A concentric and coaxial vacuum intelligent mixer

Abstract

This utility model discloses a concentric and coaxial vacuum intelligent mixer. Through the coaxial design of the mixing shaft, bearing housing, and positioning seat, the stability of the mixing process and the uniformity of axial force are ensured, reducing vibration and eccentric wear. The flexible scraper structure effectively removes material residue from the inner wall and bottom of the tank, avoiding dead corners and reducing metal friction loss. Combined with the negative pressure environment created by the vacuum pump and the coordinated temperature control of the heater and material temperature probe, precise low-temperature drying or high-temperature reaction can be achieved, preventing material oxidation or bubble formation. The pressure gauge displays the chamber pressure in real time, providing intuitive data for process monitoring.

Description

Technical Field

[0001] This utility model relates to the field of automatic production equipment technology, and in particular to a concentric and coaxial vacuum intelligent mixer. Background Technology

[0002] Currently, in fields such as chemical engineering, new materials, and powder processing, the functionality and intelligence level of mixing equipment directly affect the stability of production processes and product quality. However, existing mixing equipment generally suffers from problems such as limited functionality and structural limitations. For example, some equipment only has high-speed dispersion capabilities and lacks low-speed mixing capabilities; some equipment is not equipped with a closed vacuum system, failing to meet the requirements of volatile materials or processes requiring degassing; others lack pressure resistance, making it difficult to adapt to high-temperature or positive-pressure environments, and lack intelligent temperature control and pressure regulation systems. These functional deficiencies often prevent companies from achieving complex process conditions during the research and development of new materials due to insufficient equipment performance, severely restricting the efficiency of technological innovation and product iteration.

[0003] Furthermore, during the mixing process, the stability of the vacuum environment and the precise control of material sensitivity are crucial. Traditional equipment, due to insufficient sealing or design flaws in the vacuum system, is prone to pressure fluctuations, leading to material oxidation or reaction failure upon contact with air. Simultaneously, most equipment employs a unidirectional stirring mode, resulting in poor material mixing uniformity, especially in high-viscosity or multi-component systems, easily causing stratification and agglomeration, leading to insufficient purity and significant performance fluctuations in the finished product. These problems not only waste raw materials and manpower but also result in delivery failures due to products failing to meet customer requirements, significantly increasing the company's production costs and technical risks.

[0004] In summary, there is an urgent need for a device that integrates multiple functions, possesses high vacuum stability, intelligent control capabilities, and efficient mixing performance, in order to solve the technical bottlenecks in the research and development and production of new materials, and improve process reliability and product quality. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a concentric and coaxial vacuum intelligent mixer to solve one or more problems existing in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a concentric and coaxial vacuum intelligent mixer, comprising: a mixing shaft, the top end of which is rotatably mounted on the cover of the mixing tank via a first bearing seat, and the bottom end of which is rotatably mounted on the inner wall of the bottom of the mixing tank via a positioning seat, the first bearing seat and the positioning seat being coaxially mounted on the central axis of the mixing tank; a mixing frame, fixed on the mixing shaft, with a scraper plate on its outer edge, the scraper plate being in flexible contact with the inner wall of the mixing tank; a heater, inserted into a mounting seat on the side wall of the mixing tank, the mounting seat being located in the double-layer sandwich of the mixing tank; a material temperature probe, located at the bottom of the mixing tank and extending into the hollow cavity; a vacuum pump and a pressure gauge, the cover of the mixing tank being provided with a vacuum pump for extracting gas from the mixing tank, and a pressure gauge for displaying the pressure value inside the mixing tank cavity.

[0007] In one embodiment of the present invention, at least two dispersing units are further included, symmetrically distributed on the top of the mixing tank. Each dispersing unit includes: a dispersing motor fixed to the cover; a dispersing shaft connected to the output end of the dispersing motor via a coupling; a plurality of toothed dispersing discs arranged axially along the dispersing shaft, the toothed dispersing discs being located between the mixing shaft and the scraper plate; and a second bearing seat for rotating and supporting the dispersing shaft on the mounting flange plate of the mixing tank.

[0008] In one embodiment of the present invention, the mixing shaft is fixedly connected by an upper shaft and a lower shaft through a connecting flange sleeve. The upper shaft is rotatably mounted on a first bearing seat, and the lower shaft is rotatably supported on a positioning seat.

[0009] In one embodiment of the present invention, the mixing frame includes an extension portion and an upright portion. One end of the extension portion is connected to the mixing shaft, and the other end extends toward the inner wall of the mixing tank and connects to the upright portion. The scraper of the extension portion is attached to the bottom of the mixing tank, and the scraper of the upright portion is attached to the side wall of the mixing tank.

[0010] In one embodiment of the present invention, it further includes: a hot oil inlet, which is respectively disposed on the side wall and bottom of the mixing tank; and a discharge valve, which is installed at the center of the bottom of the mixing tank.

[0011] In one embodiment of the present invention, an oil temperature probe is provided on the side wall of the mixing tank, and the oil temperature probe is located near the hot oil inlet.

[0012] In one embodiment of the present invention, a plurality of bolt fixing seats are spaced apart on the outer side wall of the mixing tank.

[0013] In one embodiment of the present invention, a geared motor is mounted on the first bearing housing, and the output end of the geared motor is connected to a mixing shaft.

[0014] As described above, the concentric and coaxial vacuum intelligent mixer of this invention has the following beneficial effects: through the synergistic design of the coaxial double-support mixing shaft and the integrated temperature control vacuum system, a revolutionary breakthrough has been achieved in the material handling process:

[0015] 1. Significant improvement in thermal management efficiency: The direct heat exchange structure between the heater and the tank, combined with bottom temperature probe monitoring, forms a closed-loop temperature control system, ensuring that the material is heated uniformly in a constant temperature field, completely eliminating the risk of local overheating, and is especially suitable for the precision synthesis of heat-sensitive materials;

[0016] 2. A significant leap in vacuum stability: The dual-end mechanical seal technology, linked with the vacuum pump, maintains an ultra-stable negative pressure environment in the cavity during long-term operation, effectively suppressing material oxidation and volatilization, and providing reliable protection for key processes such as degassing and depressurization reactions;

[0017] 3. Innovative Hybrid Dynamic Mechanism: The concentric and coaxial drive frame drives the scraper to fit the entire perimeter, and with the forward and reverse bidirectional shear force field, the material forms a high-intensity vortex in the radial / axial direction, which instantly breaks up agglomerates and eliminates dead zones in the mixing, significantly improving the uniformity of nanoscale dispersion;

[0018] 4. Intelligent resource recycling: The integrated steam recovery system uses condensation reflux technology to capture, purify and reuse process volatiles, reducing the loss of high-value materials from the source and practicing the concept of green manufacturing.

[0019] The equipment ultimately achieves synergistic optimization of mixing efficiency, product purity, and energy consumption control, providing a foundation for breakthroughs in core materials in fields such as high-end electronic pastes and medical polymers. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of the concentric and coaxial vacuum intelligent mixer provided by this utility model;

[0022] Figure 2 A cross-sectional view of the concentric and coaxial vacuum intelligent mixer provided by this utility model.

[0023] Component designation explanation

[0024] 1. Mixing shaft; 2. First bearing housing; 3. Mixing tank; 4. Positioning seat; 5. Mixing frame; 6. Scraper; 7. Heater; 8. Material temperature probe; 9. Vacuum pump; 10. Pressure gauge; 11. Dispersion motor; 12. Dispersion shaft; 13. Toothed dispersion disc; 14. Second bearing housing; 15. Connecting flange; 16. Hot oil inlet; 17. Discharge valve; 18. Oil temperature probe; 19. Bolt fixing seat; 20. Gear motor. Detailed Implementation

[0025] This utility model provides a concentric and coaxial vacuum intelligent mixer. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. In the description of this utility model, it should be understood that the terms "up, down, left, right," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and should not be construed as limiting this utility model; in addition, the terms "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Please see Figure 1 and Figure 2 This utility model provides a concentric and coaxial vacuum intelligent mixer, comprising: a mixing shaft 1, the top end of which is rotatably mounted on the cover of a mixing tank 3 via a first bearing seat 2, and the bottom end of which is rotatably mounted on the inner wall of the bottom of the mixing tank 3 via a positioning seat 4, the first bearing seat 2 and the positioning seat 4 being coaxially mounted on the central axis of the mixing tank 3; a mixing frame 5, fixed to the mixing shaft 1, with a scraper 6 on its outer edge, the scraper 6 being in flexible contact with the inner wall of the mixing tank 3; a heater 7, inserted into a mounting seat on the side wall of the mixing tank 3, the mounting seat being located in the double-layer sandwich of the mixing tank 3; a material temperature probe 8, located at the bottom of the mixing tank 3 and extending into the hollow cavity; a vacuum pump 9 and a pressure gauge 10, the cover of the mixing tank 3 being provided with a vacuum pump 9 for extracting gas from the mixing tank 3, and a pressure gauge 10 for displaying the pressure value inside the cavity of the mixing tank 3. Specifically, a geared motor 20 is mounted on the first bearing seat 2, and the output end of the geared motor 20 is connected to the mixing shaft 1. The design of the geared motor 20 directly driving the mixing shaft 1, combined with frequency conversion control technology, achieves stepless speed regulation, which can flexibly adapt to the mixing needs of different materials (such as low-speed kneading or high-speed dispersion). The constant torque output of the motor avoids speed fluctuations caused by load changes, ensuring the continuity and uniformity of the mixing process, while reducing energy consumption and mechanical wear.

[0027] It also includes at least two dispersing units, symmetrically distributed on the top of the mixing tank 3. Each dispersing unit includes: a dispersing motor 11 fixed to the cover; a dispersing shaft 12 connected to the output end of the dispersing motor 11 via a coupling; multiple toothed dispersing discs 13 arranged axially along the dispersing shaft 12, the toothed dispersing discs 13 being located between the mixing shaft 1 and the scraper plate 6; and a second bearing seat 14 for rotatably supporting the dispersing shaft 12 on the mounting flange plate of the mixing tank 3. The two dispersing motors 11 are driven independently, that is, they can rotate forward and reverse simultaneously, or one can rotate forward and the other reverse. The specific operating states are as follows: Simultaneous forward rotation: Both dispersion shafts 12 rotate at high speed in the same direction, and the toothed dispersion disk 13 applies a shearing force to the material in the same direction, enhancing the radial flow and dispersion uniformity of the material, suitable for rapid mixing of high-viscosity materials; Simultaneous reverse rotation: Both dispersion shafts 12 rotate in opposite directions, and the toothed dispersion disk 13 forms a counter-shearing field, generating a strong turbulence effect, accelerating material refinement and bubble elimination, suitable for mixing low-viscosity or bubble-containing systems; One forward and one reverse rotation: The two dispersion shafts 12 run in different directions, forming a dynamically balanced vortex field, which can prevent the material from unidirectionally swirling and agglomerating, while simultaneously achieving multi-dimensional shearing, suitable for dispersing materials with sensitive particle size or prone to agglomeration. The dispersion motor 11 independently adjusts its speed and direction of rotation through frequency conversion speed regulation or a PLC control system. The second bearing seat 14 adopts a vacuum sealing design to ensure high-speed rotation stability and prevent media leakage. The staggered arrangement of the toothed dispersion disks 13, in conjunction with the mixing shaft 1 and the scraper plate 6, enables efficient and thorough fine mixing without dead angles in a vacuum environment. Understandably, the symmetrically distributed dispersion units generate high-intensity shear force through the toothed dispersion disc 13, significantly improving material refinement and mixing uniformity, especially suitable for high-viscosity or complex systems. The modular design of the dispersion motor 11, coupling, and dispersion shaft 12 simplifies the maintenance process. The dispersion disc is located between the mixing shaft 1 and the scraper plate 6, avoiding structural interference. The second bearing housing 14 enhances the support of the dispersion shaft 12, improving stability under high-speed operation, reducing radial runout and noise, and improving the overall reliability and service life of the equipment.

[0028] To broaden the application scenarios of the mixing shaft 1 and optimize its structure, the mixing shaft 1 consists of an upper shaft and a lower shaft fixedly connected by a connecting flange sleeve 15. The upper shaft rotatably passes through the first bearing seat 2, while the lower shaft rotatably supports the positioning seat 4. The mixing shaft 1 adopts a segmented structure (the upper and lower shafts are connected by a flange sleeve), which flexibly adapts to the size requirements of different specifications of mixing tanks 3 and facilitates partial replacement or maintenance. The design of the upper shaft passing through the first bearing seat 2 and the lower shaft being supported by the positioning seat 4 ensures the coaxiality and rigidity of the shaft system, reduces eccentric wear caused by installation errors, and meets the dual requirements of sealing and stability in a vacuum environment.

[0029] In detail, the mixing frame 5 includes an extension section and an upright section. One end of the extension section is connected to the mixing shaft 1, and the other end extends into the inner wall of the mixing tank 3 and connects to the upright section. The scraper plate 6 of the extension section is attached to the bottom of the mixing tank 3, and the scraper plate 6 of the upright section is attached to the side wall of the mixing tank 3.

[0030] The combined design of the extended and upright sections of the hybrid frame 5 enables full-coverage scraping of the tank bottom and sidewalls, effectively reducing material residue and making it particularly suitable for handling highly adhesive materials. The structure, with the extended section conforming to the tank bottom and the upright section conforming to the sidewalls, maintains tight contact even under vacuum conditions, balancing cleaning efficiency and sealing, and avoiding residue problems caused by deformation or gaps in traditional scraping structures.

[0031] It also includes: hot oil inlets 16, respectively located on the side wall and bottom of the mixing tank 3; and a discharge valve 17, installed at the center of the bottom of the mixing tank 3. Clearly, the design of the dual hot oil inlets 16 on the side wall and bottom forms a circulating heating path, ensuring uniform temperature distribution within the tank and preventing localized overheating or low-temperature zones from affecting material quality. The bottom center discharge valve 17, in conjunction with a vacuum environment, enables rapid, residue-free discharge, which is particularly suitable for high-viscosity or heat-sensitive materials, simplifying the discharge process and reducing the risk of cross-contamination.

[0032] To monitor the oil temperature in real time, an oil temperature probe 18 is installed on the side wall of the mixing tank 3, and the oil temperature probe 18 is positioned near the hot oil inlet 16. By monitoring the hot oil temperature in real time, the oil temperature probe 18 forms a closed-loop control system in conjunction with the heater 7, significantly improving heating accuracy and response speed, and preventing material deterioration or equipment damage caused by oil temperature fluctuations. The probe data can also be integrated into a safety warning mechanism, automatically cutting off the power supply when the temperature exceeds the limit, further ensuring process safety and equipment stability.

[0033] The mixing tank 3 has several bolt fixing seats 19 spaced apart on its outer side wall. This spaced bolt fixing seat 19 design on the outer side wall of the mixing tank 3 enhances the tank's pressure resistance, especially under vacuum conditions, effectively resisting internal and external pressure differences and preventing tank deformation or leakage. The standardized bolt fixing method simplifies equipment assembly and maintenance processes, improving structural reliability and long-term operational stability.

[0034] The specific working process of the concentric and coaxial vacuum intelligent mixer is as follows: After the material is added to the mixing tank 3 and the cover is closed, the vacuum pump 9 is started to extract the gas in the tank to the preset vacuum level, and the pressure gauge 10 monitors the chamber pressure in real time. The geared motor 20 drives the mixing shaft 1 to rotate, which drives the mixing frame 5 and the scraper 6 fixed on the shaft to rotate at low speed. The scraper 6 flexibly fits against the inner wall and bottom of the tank, mixing and removing material residue at the same time. The dispersion motor 11 drives the dispersion shaft 12 and the toothed dispersion disc 13 to rotate at high speed through the coupling. The dispersion disc is located between the mixing shaft 1 and the scraper 6, applying strong shear force to the material to promote fine and uniform mixing. Hot oil is injected through the side wall and bottom feed inlet, and the heater 7 provides auxiliary heating. The oil temperature probe 18 and the material temperature probe 8 are linked for feedback to accurately control the temperature of the heating medium and ensure constant temperature mixing of the material. In a vacuum environment, the mixing shaft 1, the dispersion disc and the scraper 6 work together to achieve efficient mixing and avoid material oxidation or bubble generation. After mixing is complete, turn off the vacuum pump 9 and open the bottom discharge valve 17 to discharge the material quickly using gravity or pressure difference. The scraper plate 6 further reduces residue. Clean and maintain the equipment after it cools down.

[0035] In summary, this concentric and coaxial vacuum intelligent mixer achieves a synergistic effect of efficient heat transfer and precise temperature control through integrated design. The linked configuration of its heater 7 and material temperature probe 8 significantly improves heating uniformity and maintains a constant temperature environment. The combination of a double-end mechanical seal structure and a vacuum system effectively ensures the stability of the vacuum level within the chamber, preventing material oxidation or reaction failure due to pressure fluctuations. The concentric and coaxial layout of the mixing shaft 1 and frame structure, combined with alternating forward and reverse stirring modes, creates a multi-directional impact shear effect, accelerating the material homogenization process. Furthermore, through the synergistic effect of the filter and condenser, the evaporating material is returned to the recovery tower for recycling, significantly reducing material loss while improving mixing efficiency, thus balancing process reliability and resource utilization. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial application value.

[0036] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A concentric and coaxial vacuum intelligent mixer, characterized in that, include: The mixing shaft (1) is rotatably mounted on the cover of the mixing tank (3) via the first bearing seat (2) at its top end and rotatably mounted on the inner wall of the bottom of the mixing tank (3) via the positioning seat (4) at its bottom end. The first bearing seat (2) and the positioning seat (4) are coaxially mounted on the central axis of the mixing tank (3). A mixing frame (5) is fixed on the mixing shaft (1), and a scraper (6) is provided on its outer edge. The scraper (6) is in flexible contact with the inner wall of the mixing tank (3). The heater (7) is inserted into the mounting base on the side wall of the mixing tank (3), the mounting base being located in the double-layer sandwich of the mixing tank (3); The material temperature probe (8) is located at the bottom of the mixing tank (3) and extends into the hollow cavity; A vacuum pump (9) and a pressure gauge (10) are provided on the cover of the mixing tank (3) for extracting gas from the mixing tank (3) and a pressure gauge (10) for displaying the pressure value inside the mixing tank (3).

2. The concentric and coaxial intelligent vacuum mixer according to claim 1, characterized in that, It also includes at least two dispersion units, symmetrically distributed at the top of the mixing tank (3), each dispersion unit comprising: A dispersing motor (11) fixed to the cover; The dispersing shaft (12) is connected to the output end of the dispersing motor (11) via a coupling; Multiple toothed dispersion disks (13) are arranged axially along the dispersion axis (12), and the toothed dispersion disks (13) are located between the mixing axis (1) and the scraper plate (6); The second bearing housing (14) is used to rotatably support the dispersion shaft (12) on the mounting flange of the mixing tank (3).

3. The concentric and coaxial intelligent vacuum mixer according to claim 2, characterized in that, The hybrid shaft (1) is fixedly connected by an upper shaft and a lower shaft through a connecting flange sleeve (15). The upper shaft is rotatably mounted on the first bearing seat (2), and the lower shaft is rotatably supported on the positioning seat (4).

4. The concentric and coaxial intelligent vacuum mixer according to claim 2, characterized in that, The mixing frame (5) includes an extension section and an upright section. One end of the extension section is connected to the mixing shaft (1), and the other end extends to the inner wall of the mixing tank (3) and connects to the upright section. The scraper (6) of the extension section is attached to the bottom of the mixing tank (3), and the scraper (6) of the upright section is attached to the side wall of the mixing tank (3).

5. The concentric and coaxial intelligent vacuum mixer according to claim 1, characterized in that, Also includes: Hot oil inlet (16) is located on the side wall and bottom of the mixing tank (3); The discharge valve (17) is installed at the center of the bottom of the mixing tank (3).

6. The concentric and coaxial intelligent vacuum mixer according to claim 5, characterized in that, An oil temperature probe (18) is provided on the side wall of the mixing tank (3), and the oil temperature probe (18) is located near the hot oil inlet (16).

7. The concentric and coaxial vacuum intelligent mixer according to claim 1, characterized in that, Several bolt fixing seats (19) are distributed at intervals on the outer wall of the mixing tank (3).

8. The concentric and coaxial intelligent vacuum mixer according to claim 1, characterized in that, A geared motor (20) is mounted on the first bearing housing (2), and the output end of the geared motor (20) is connected to a mixing shaft (1).

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