A precise mixing device for slurry proportioning

Abstract

This utility model discloses a slurry precise proportioning and mixing device, which includes a material cylinder, a liquid feeding unit and a solid feeding unit on the material cylinder, and a solid-liquid mixing unit inside the material cylinder. The liquid feeding unit, the solid feeding unit and the solid-liquid mixing unit are all electrically connected to a measurement and control unit. The liquid feeding unit includes a water pump connected to an external liquid storage tank. The water pump is connected to the material cylinder through a connecting pipe, and a first solenoid valve and a flow sensor are installed on the connecting pipe. The solid feeding unit includes a feeding unit, and a feeding hopper is installed below the feeding unit. A feeding valve is installed at the bottom of the feeding hopper. The feeding valve includes a valve plate that opens and closes the feeding valve by horizontal extension and retraction. A weighing platform is installed on the valve plate. The bottom of the feeding hopper is connected to the material cylinder through a material conveying unit. This solution can achieve precise control of the ratio of solid materials and liquid materials, so as to reduce the proportioning error and improve the consistency of materials.

Description

Technical Field

[0001] This utility model relates to the field of material proportioning technology, specifically to a slurry precise proportioning and mixing device. Background Technology

[0002] In the production process of MLCC ceramic thin film slurry, the precise proportioning and uniform mixing of the slurry are crucial to the quality of the final product.

[0003] In the prior art, such as in publication number CN209237765U, a stirring device for ceramic pigments is disclosed. It includes a base, a stirring tank, and a stirring rod. Starting the stirring motor drives the stirring rod to rotate, and the left and right stirring blades also rotate in opposite directions, which can stir the ceramic pigments more evenly and reduce stirring resistance. The spiral blades carry the ceramic pigments upward, transporting the ceramic pigments from the bottom to the top for further stirring, ensuring the quality of the ceramic pigments. The wear-resistant layer can increase the service life of the stirring device. Fixing the stirring rod and stirring holes can further disperse the pigments. After stirring is completed, the solenoid valve is opened to release the ceramic pigments from the stirring tank.

[0004] However, existing material mixing devices are difficult to test for mixing effect, slurry tends to accumulate at the bottom of the mixing tank, and the material ratio depends on manual premixing, which has problems such as large ratio error and low efficiency. As a result, it is difficult to accurately control the solid-liquid ratio of liquid and solid materials in the slurry, thus affecting the performance and stability of ceramic film slurry. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a slurry precise proportioning and mixing device, which solves the technical problems mentioned in the background art and realizes precise proportioning and uniform mixing of slurry.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A slurry precise proportioning and mixing device is provided, comprising a material cylinder, a liquid feeding unit and a solid feeding unit disposed on the material cylinder, and a solid-liquid mixing unit disposed inside the material cylinder, wherein the liquid feeding unit, the solid feeding unit and the solid-liquid mixing unit are all electrically connected to a measurement and control unit; the liquid feeding unit includes a water pump connected to an external liquid storage tank, the water pump being connected to the material cylinder via a connecting pipe, and a first solenoid valve and a flow sensor being disposed on the connecting pipe; the solid feeding unit includes a feeding unit, a feeding hopper disposed below the feeding unit, a feeding valve disposed at the bottom of the feeding hopper, the feeding valve including a valve plate that opens and closes the feeding valve by horizontal extension, a weighing platform disposed on the valve plate, and the bottom of the feeding hopper being connected to the material cylinder via a material conveying unit.

[0008] Furthermore, the solid-liquid mixing unit includes impeller-type mixing blades located at the bottom of the material cylinder. The impeller-type mixing blades are connected to the first motor at the top of the material cylinder via a drive shaft. Spiral mixing blades are provided on both sides of the drive shaft. The upper ends of the two spiral mixing blades are respectively connected to the second motor and the third motor at the top of the material cylinder.

[0009] Furthermore, the bottom of the impeller-type mixing blades is connected to the scraper, and the scraper slides and fits against the bottom surface of the material cylinder.

[0010] Furthermore, rotary encoders are installed on the first motor, the second motor, and the third motor.

[0011] Furthermore, a temperature sensor and several viscosity meters are installed inside the barrel, and the viscosity meters are arranged at intervals in the vertical direction of the inner wall of the barrel.

[0012] Furthermore, the feeding unit includes a storage hopper, a feeding channel is provided at the bottom of the storage hopper, a feeding impeller is fitted in the feeding channel, and the feeding impeller is drivenly connected to the feeding motor.

[0013] Furthermore, the material conveying unit includes a horizontal pipe, one end of which is connected to the bottom of the feed hopper, and the other end of which is connected to the material cylinder via an inclined slide. A spiral conveying blade is fitted inside the horizontal pipe, and one end of the spiral conveying blade is connected to the fourth motor drive.

[0014] Furthermore, an orifice plate is provided at the connection between the horizontal pipe and the inclined slide, and the other end of the spiral conveying blade is limited on the orifice plate by a bearing.

[0015] Furthermore, the spacing between the spiral conveyor blades gradually decreases along the material conveying direction.

[0016] Furthermore, a feed pipe with a second solenoid valve is provided at the bottom of the barrel.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. The liquid feeding unit of this solution achieves precise measurement and control of the liquid feeding amount through the cooperation of the first solenoid valve and the flow sensor; the solid feeding unit first achieves automatic supply of solid materials through the feeding unit, then measures the weight data of the solid materials through the weighing platform, and finally conveys the quantitative solid materials into the material cylinder through the material conveying unit, thereby achieving precise control of the ratio of solid materials and liquid materials, so as to reduce the mixing error and improve the consistency of materials.

[0019] 2. The solid-liquid mixing unit of this solution can initially mix the liquid through impeller-type mixing blades, and enhance the dispersion and mixing of solid materials through the spiral mixing blades on both sides of the drive shaft. The rotating scraper can effectively prevent solid materials from settling at the bottom of the barrel. Under the synergistic action of impeller-type mixing blades, spiral mixing blades and scraper, a composite mixing trajectory is formed, which improves the uniformity of solid material distribution and the rheological stability of the slurry, thereby achieving uniform mixing of liquid and solid materials.

[0020] 3. This solution uses several viscosity meters to collect viscosity data at different heights of the slurry in the barrel, so as to judge the uniformity of the slurry mixing. When the uniformity is not up to standard, the mixing speed of the impeller, scraper and spiral mixing blades can be increased, and the rotation speed can be monitored by a rotary encoder until the uniformity is up to standard, thereby improving the uniformity and rheological stability of the slurry.

[0021] 4. The material conveying unit of this scheme achieves stable conveying of solid materials through spiral conveying blades. The spacing of the spiral conveying blades gradually decreases along the material conveying direction, so that while conveying solid materials, the spiral conveying blades can gradually squeeze and crush the solid materials, thereby improving the degree of powdering of solid materials, which is beneficial to subsequent mixing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a mixing device for precise proportioning of slurry.

[0023] Figure 2 This is a schematic diagram of the internal structure of the barrel.

[0024] Figure 3 This is a schematic diagram of the feeding unit.

[0025] Figure 4 This is a side view of the feed hopper, feed valve, and material conveying unit.

[0026] Figure 5 This is a schematic diagram of the feed valve.

[0027] Figure 6 This is a schematic diagram of the material conveying unit.

[0028] The components include: 1. Material cylinder; 2. Water pump; 3. Connecting pipe; 4. First solenoid valve; 5. Flow sensor; 6. Discharge unit; 7. Feed hopper; 8. Feed valve; 9. Valve plate; 10. Weighing platform; 11. Material conveying unit; 12. Impeller-type stirring blade; 13. Drive shaft; 14. First motor; 15. Spiral stirring blade; 16. Second motor; 17. Third motor; 18. Scraper; 19. Rotary encoder; 20. Temperature sensor; 21. Viscometer; 22. Storage hopper; 23. Discharge channel; 24. Discharge impeller; 25. Discharge motor; 26. Horizontal pipe; 27. Inclined slide; 28. Spiral conveying blade; 29. ​​Fourth motor; 30. Orifice plate; 31. Second solenoid valve; 32. Discharge pipe; 33. Human-machine interface; 34. Miniature air pump. Detailed Implementation

[0029] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0030] like Figures 1 to 6 As shown, the slurry precise proportioning and mixing device of this scheme includes a material cylinder 1, on which a liquid feeding unit and a solid feeding unit are provided. A solid-liquid mixing unit is provided inside the material cylinder 1, and the liquid feeding unit, the solid feeding unit and the solid-liquid mixing unit are all electrically connected to the measurement and control unit. The measurement and control unit may include a human-machine interface 33 for displaying and inputting process parameters.

[0031] The liquid feeding unit includes a water pump 2 connected to an external liquid storage tank. The water pump 2 is connected to the material cylinder 1 via a connecting pipe 3, and a first solenoid valve 4 and a flow sensor 5 are installed on the connecting pipe 3. The flow sensor 5 monitors the liquid flow rate in real time and feeds back the signal to the measurement and control unit. Based on the feedback from the flow sensor 5, the measurement and control unit adjusts the opening of the first solenoid valve 4 to precisely control the liquid flow rate and ensure that the liquid enters the material cylinder at the set flow rate. When the liquid flow rate reaches the set value, the first solenoid valve 4 automatically closes to avoid adding too much liquid material, thereby ensuring the accuracy of the slurry ratio.

[0032] The solid feeding unit includes a feeding unit 6, a feeding hopper 7 is provided below the feeding unit 6, a feeding valve 8 is provided at the bottom of the feeding hopper 7, the feeding valve 8 includes a valve plate 9 that opens and closes by horizontal extension and retraction. Specifically, the valve plate 9 can be driven to extend and retract horizontally by a micro air pump 34; a weighing platform 10 is provided on the valve plate 9, and the bottom of the feeding hopper 7 is connected to the material cylinder 1 through a material conveying unit 11.

[0033] The bottom of the material cylinder 1 is funnel-shaped, and the bottom of the material cylinder 1 is equipped with a discharge pipe 32 with a second solenoid valve 31 to control the discharge of slurry.

[0034] The liquid feeding unit of this scheme achieves precise measurement and control of the liquid feeding amount through the cooperation of the first solenoid valve 4 and the flow sensor 5; the solid feeding unit first achieves automatic supply of solid materials through the feeding unit 6, then measures the weight data of the solid materials through the weighing platform 10, and finally conveys the quantitative solid materials into the material cylinder 1 through the material conveying unit 11, thereby achieving precise control of the ratio of solid materials and liquid materials, so as to reduce the mixing error and improve the consistency of materials.

[0035] As an optional implementation, the solid-liquid mixing unit includes an impeller-type mixing blade 12 located at the bottom of the material cylinder 1. The impeller-type mixing blade 12 is connected to the first motor 14 at the top of the material cylinder 1 via a drive shaft 13. Spiral mixing blades 15 are provided on both sides of the drive shaft 13. The upper ends of the two spiral mixing blades 15 are respectively connected to the second motor 16 and the third motor 17 at the top of the material cylinder 1. The bottom of the impeller-type mixing blade 12 is connected to a scraper 18. The scraper 18 slides against the bottom surface of the material cylinder 1, that is, it is tangent to the inclined surface at the bottom of the material cylinder. The inclined angle is preferably 45 degrees. A rotary encoder 19 is provided on the first motor 14, the second motor 16 and the third motor 17 to detect their rotation speed respectively.

[0036] In this embodiment, the impeller-type stirring blades 12 can perform initial stirring of the liquid, while the spiral stirring blades 15 on both sides of the drive shaft 13 can enhance the dispersion and mixing of solid materials. The rotating scraper 18 can effectively prevent solid materials from settling at the bottom of the material cylinder 1. Under the synergistic action of the impeller-type stirring blades 12, the spiral stirring blades 15 and the scraper 18, a composite stirring trajectory is formed, which improves the uniformity of solid material distribution and the rheological stability of the slurry, thereby achieving uniform stirring of liquid and solid materials.

[0037] As an optional implementation, a temperature sensor 20 and three viscosity meters 21 are installed inside the barrel 1, and the three viscosity meters 21 are arranged at intervals in the upper, middle and lower layers of the inner sidewall of the barrel 1. The temperature sensor 20 can monitor the temperature change of the mixture in real time, and the viscosity meters 21 can monitor the viscosity change of the material during the mixing process. The viscosity values ​​of each layer of the mixture are detected simultaneously during the stirring process. During operation, the three sets of viscosity data can be collected and compared by the measurement and control unit. If the viscosity difference of the three is within the preset range, it is judged as uniform mixing; otherwise, it is judged as uneven mixing. The stirring speed of the impeller stirring blade 12, scraper 18 and spiral stirring blade 15 can be increased, and the rotation speed is monitored by the rotary encoder 19 until the uniformity meets the standard, thereby improving the uniformity and rheological stability of the slurry.

[0038] As an optional implementation, the feeding unit 6 includes a storage hopper 22, which is used to collect and temporarily store the mixed material. The storage hopper 22 is installed and fixed by a support frame. A feeding channel 23 is provided at the bottom of the storage hopper 22. A feeding impeller 24 is fitted in the feeding channel 23. The feeding impeller 24 is connected to the feeding motor 25. The feeding impeller 24 rotates under the drive of the feeding motor 25 and controls the unloading rate of the material in the storage hopper 22. The weighing platform 10 can monitor the storage amount in the feeding hopper 7 in real time. When the material reaches the preset upper or lower limit, it sends a signal to the measurement and control unit to stop the feeding motor 25 and open the valve plate 9 of the feeding valve 8, thereby realizing precise control of the unloading time and unloading amount of the material.

[0039] As an optional implementation, the material conveying unit 11 includes a horizontal pipe 26, one end of which is connected to the bottom of the feed hopper 7, and the other end of which is connected to the material cylinder 1 via an inclined slide 27. A spiral conveying blade 28 is fitted inside the horizontal pipe 26, one end of which is connected to a fourth motor 29 for transmission. A perforated plate 30 is provided at the connection between the horizontal pipe 26 and the inclined slide 27, and the other end of the spiral conveying blade 28 is limited on the perforated plate 30 by a bearing. The spacing of the spiral conveying blades 28 gradually decreases along the material conveying direction.

[0040] In this embodiment, the material conveying unit 11 achieves stable conveying of solid materials through spiral conveying blades 28. The spacing of the spiral conveying blades 28 gradually decreases along the material conveying direction, so that while conveying solid materials, the spiral conveying blades 28 can gradually crush and pulverize the solid materials. The crushed solid materials pass through the perforated plate 30 and are conveyed into the material bucket through the inclined slide 27. This conveying method improves the degree of powdering of solid materials, which is beneficial to subsequent stirring and mixing.

Claims

1. A slurry precise proportioning and mixing device, characterized in that, The device includes a material cylinder, on which a liquid feeding unit and a solid feeding unit are provided. A solid-liquid stirring unit is provided inside the material cylinder, and the liquid feeding unit, the solid feeding unit, and the solid-liquid stirring unit are all electrically connected to a measurement and control unit. The liquid feeding unit includes a water pump connected to an external liquid storage tank. The water pump is connected to a material cylinder via a connecting pipe, and a first solenoid valve and a flow sensor are installed on the connecting pipe. The solid feeding unit includes a feeding unit, a feeding hopper is provided below the feeding unit, a feeding valve is provided at the bottom of the feeding hopper, the feeding valve includes a valve plate that opens and closes the feeding valve by horizontal extension and retraction, a weighing platform is provided on the valve plate, and the bottom of the feeding hopper is connected to the material cylinder through a material conveying unit.

2. The slurry precise proportioning and mixing device according to claim 1, characterized in that, The solid-liquid mixing unit includes impeller-type mixing blades located at the bottom of the material cylinder. The impeller-type mixing blades are connected to a first motor at the top of the material cylinder via a drive shaft. Spiral mixing blades are provided on both sides of the drive shaft. The upper ends of the two spiral mixing blades are respectively connected to a second motor and a third motor at the top of the material cylinder.

3. The slurry precise proportioning and mixing device according to claim 2, characterized in that, The bottom of the impeller-type stirring blade is connected to the scraper, and the scraper slides and fits against the bottom surface of the material cylinder.

4. The slurry precise proportioning and mixing device according to claim 2, characterized in that, Rotary encoders are installed on the first motor, the second motor, and the third motor.

5. The slurry precise proportioning and mixing device according to claim 2, characterized in that, The barrel is equipped with a temperature sensor and several viscosity meters, which are arranged at intervals on the vertical direction of the inner wall of the barrel.

6. The slurry precise proportioning and mixing device according to claim 1, characterized in that, The feeding unit includes a storage hopper, and a feeding channel is provided at the bottom of the storage hopper. A feeding impeller is fitted inside the feeding channel, and the feeding impeller is drivenly connected to the feeding motor.

7. The slurry precise proportioning and mixing device according to claim 1, characterized in that, The material conveying unit includes a horizontal pipe, one end of which is connected to the bottom of the feed hopper, and the other end of which is connected to the material cylinder via an inclined slide. A spiral conveying blade is fitted inside the horizontal pipe, and one end of the spiral conveying blade is connected to a fourth motor drive.

8. The slurry precise proportioning and mixing device according to claim 7, characterized in that, An orifice plate is provided at the connection between the horizontal pipe and the inclined slide, and the other end of the spiral conveying blade is limited on the orifice plate by a bearing.

9. The slurry precise proportioning and mixing device according to claim 8, characterized in that, The spacing between the spiral conveyor blades gradually decreases along the material conveying direction.

10. The slurry precise proportioning and mixing device according to claim 1, characterized in that, The bottom of the material cylinder is equipped with a feed pipe with a second solenoid valve.

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