An ultrasonic-assisted multi-stage turbulence-type cement paste mixer

Abstract

This application provides an ultrasonic-assisted multi-stage turbulence-type cement paste mixer, characterized by comprising: a base; a vertical support frame fixedly installed on the base; a sealed enclosure fixedly installed on the vertical support frame; a stirring shaft assembly connected to the sealed enclosure, the stirring shaft assembly being driven by a motor for stirring the mixture; a lifting platform slidably installed on the vertical support frame, on which a stirring tank is detachably installed, the stirring tank being raised and lowered by the up and down movement of the lifting platform to achieve a closed stirring chamber formed by the sealed enclosure; and a vibrating discharge mechanism provided at the bottom of the stirring tank, the vibrating discharge mechanism being used to assist stirring during the mixing process, prevent edge effects, assist in the discharge of cement paste, and reduce residue. This invention solves the technical problems of cement paste mixers, such as severe dust generation, uneven mixing, difficult cleaning, easy wear of transmission components, high material residue, and low automation.

Description

Technical Field

[0001] This invention relates to the field of laboratory cement mixing equipment, specifically to an ultrasonic-assisted multi-stage turbulent cement paste mixer. Background Technology

[0002] Cement paste mixers are core specialized equipment in laboratories for testing the cementitious properties of cement. Their mixing effect directly determines the uniformity of the cement paste, which in turn affects the accuracy, reliability, and repeatability of subsequent cement performance test data. Currently, the traditional cement paste mixers commonly used in laboratories have revealed numerous technical deficiencies in long-term practical application, making it difficult to meet the demands of high-precision, standardized, and automated modern building materials testing.

[0003] Traditional cement paste mixers use an open feeding and mixing structure, which easily generates local dust during the addition of cement powder. This not only causes the loss of cement materials but also pollutes the laboratory experimental environment. Furthermore, the dust can be harmful to the health of laboratory personnel if inhaled.

[0004] The mixing tank and mixing blades are a fixed fit structure, which cannot realize the axial lifting and convection of materials. During the mixing process, dead corners are easily formed at the bottom of the tank and the inner edge of the tank, resulting in uneven mixing of cement paste. This problem is more prominent in high viscosity paste and paste systems containing chemical admixtures.

[0005] The inner wall of the mixing tank and the surface of the mixing blades are prone to solidified cement slurry adhering to them. The equipment lacks a dedicated cleaning structure, making manual cleaning difficult and inefficient. Residual cement slurry will seriously affect the detection accuracy of subsequent experiments. The equipment does not have an automatic quantitative liquid injection function. During the experiment, water or chemical additives need to be weighed and added manually. Human operation error is large, making it difficult to ensure the accuracy of liquid-material ratio.

[0006] The transmission components are directly exposed to the outside, making them susceptible to blockage and wear caused by cement dust and impurities, which reduces the service life and operational stability of the equipment. During the discharge process, materials tend to stick to the bottom of the mixing tank and require manual cleaning, which increases the complexity of the experimental operation and is also prone to human error.

[0007] To address some of the aforementioned issues, existing technologies have introduced several improved cement paste mixers. For example, mixers with detachable and retractable double-bladed mixing blades allow for blade lifting and disassembly, reducing dead zones in the mixing process and facilitating cleaning. Mixers with unfolded and retractable mixing blades utilize scraper devices for mechanical blade cleaning. However, these improved devices still lack multiple functions such as dust prevention, automatic quantitative liquid injection, ultrasonic vibration-assisted discharge, and all-dimensional non-disassembly cleaning. The overall structural design still has significant room for optimization and cannot meet the comprehensive needs of high-precision cement paste preparation in laboratories. Summary of the Invention

[0008] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide an ultrasonic-assisted multi-stage turbulence-type cement paste mixer, which solves the technical problems of existing cement paste mixers such as serious dust generation, uneven mixing, difficult cleaning, easy wear of transmission components, large amount of material residue, and low degree of automation.

[0009] To achieve the above-mentioned technical objectives, the present invention provides an ultrasonic-assisted multi-stage turbulent flow cement paste mixer, comprising:

[0010] Base;

[0011] A vertical support frame is fixedly installed on the base;

[0012] A sealed enclosure is fixedly installed on the vertical support frame;

[0013] A stirring shaft assembly is connected to the sealed cover. The stirring shaft assembly is driven by a motor and is used to stir the mixture.

[0014] A lifting platform is slidably installed on the vertical support frame. A mixing tank is detachably installed on the lifting platform. A sealed cover is set on the travel path of the mixing tank. The lifting platform moves up and down to drive the mixing tank to rise and fall, so that the sealed cover can cooperate to form a closed mixing chamber. A vibration discharge mechanism is set at the bottom area of ​​the mixing tank. The vibration discharge mechanism is used to assist the mixing during the mixing process, prevent edge effects, assist in the discharge of the slurry and reduce residue.

[0015] The cleaning module includes:

[0016] Water tank, motor and pump assembly, high-pressure water pipes, and honeycomb nozzle area located inside the sealed enclosure.

[0017] The motor-driven water pump assembly is connected to the inside of the water tank via a water pipe, and the motor-driven water pump assembly is used to pump water out of the water tank;

[0018] The motor-pump assembly is connected to the honeycomb nozzle area through the high-pressure water pipe. The honeycomb nozzle area is provided with three annularly distributed nozzle regions. The nozzles are high-pressure atomizing nozzles with a spray pressure of 0.3-0.5MPa, achieving 360° high-pressure spray cleaning.

[0019] The stirring shaft assembly has multi-stage turbulence stirring blades arranged in staggered layers along the axial direction. The surface of the multi-stage turbulence stirring blades and the inner wall of the stirring tank are coated with a Teflon anti-stick coating with a thickness of 0.1-0.2 mm.

[0020] Compared with the prior art, the beneficial effects of the present invention include:

[0021] This invention achieves the core functions of dust prevention, dead-angle mixing, rapid cleaning without disassembly, and low-residue discharge by designing a dust-proof sealed feeding and mixing system, a high-efficiency uniform mixing multi-stage turbulence blade system, an integrated non-disassembly cleaning module, a precise mechanical lifting and positioning system, and an ultrasonic vibration-assisted discharge structure. At the same time, it optimizes the transmission structure design to reduce the vibration and noise of the equipment operation, improve the operational stability and service life of the equipment, and meet the high-precision, standardized, and automated cement paste preparation experimental needs of the laboratory.

[0022] According to some embodiments of the present invention, it further includes:

[0023] Cleaning module, the cleaning module includes:

[0024] Water tank, motor and pump assembly, high-pressure water pipes, and honeycomb nozzle area located inside the sealed enclosure.

[0025] The motor-driven water pump assembly is connected to the inside of the water tank via a water pipe, and the motor-driven water pump assembly is used to pump water out of the water tank;

[0026] The motor-pump assembly is connected to the honeycomb nozzle area through the high-pressure water pipe. The honeycomb nozzle area is provided with three annularly distributed nozzle regions. The nozzles are high-pressure atomizing nozzles with a spray pressure of 0.3-0.5MPa, achieving 360° high-pressure spray cleaning.

[0027] The stirring shaft assembly has multi-stage turbulence stirring blades arranged in staggered layers along the axial direction. The surface of the multi-stage turbulence stirring blades and the inner wall of the stirring tank are coated with a Teflon anti-stick coating with a thickness of 0.1-0.2 mm.

[0028] According to some embodiments of the present invention, the mating point between the sealed cover and the mixing tank adopts a concave-convex stop sealing structure, and a silicone rubber sealing ring is embedded in the stop contact surface to achieve sealing;

[0029] The top of the sealed enclosure integrates a feeding module, which includes:

[0030] The manual powder inlet is used for adding cement powder, and the automatic liquid inlet is connected to a timed metering pump. The flow rate of the timed metering pump of the automatic liquid inlet is adjustable from 0 to 500 mL / min, and is used for metered injection of water or chemical admixtures.

[0031] According to some embodiments of the present invention, the multi-stage turbulence stirring blade includes: a main shaft stirring blade, an outer wall scraping auxiliary blade and a main shaft bottom notch structure. The multi-stage turbulence stirring blade has multiple layers of staggered turbulence rods in the middle, and each layer has multiple radial turbulence rods evenly distributed. Adjacent layers are radially staggered and arranged in layers along the axial direction of the stirring shaft assembly.

[0032] The outer wall scraping auxiliary blade adopts a pin-connected stop structure. The gap between the outer wall scraping auxiliary blade and the inner wall of the mixing tank can be adjusted to 0.5-1mm. When the stirring shaft assembly rotates forward, the outer wall scraping auxiliary blade retracts due to inertia. When it rotates in reverse, the outer wall scraping auxiliary blade extends outward due to inertia and fits tightly against the inner wall of the mixing tank.

[0033] According to some embodiments of the present invention, in the low-speed forward premixing stage, the radial angle of the central staggered turbulence bar is automatically adjusted to form a 30° angle with the stirring shaft to reduce stirring resistance and avoid powder splashing; in the high-speed reverse mixing stage, the angle of the turbulence bar is automatically adjusted to be perpendicular to the stirring shaft at 90° to maximize the turbulence effect and improve the mixing uniformity of high-viscosity paste.

[0034] According to some embodiments of the present invention, it further includes:

[0035] A motor drive mechanism is used to output power to the stirring shaft assembly;

[0036] A belt drive and reduction mechanism is provided at the power output end of the motor drive mechanism. The power output end of the belt drive and reduction mechanism is connected to the stirring shaft assembly. The belt drive and reduction mechanism includes a trapezoidal tooth synchronous belt drive assembly and a planetary gear reduction and torque amplification structure. The motor drive mechanism is a variable frequency speed control motor. The belt drive and reduction mechanism realizes two stirring modes: low-speed forward rotation premixing and high-speed reverse rotation uniform mixing.

[0037] According to some embodiments of the present invention, it further includes:

[0038] The lifting guide rail mechanism is used to drive the lifting platform to lift the mixing tank, so as to cooperate with the sealed cover to form a closed mixing chamber;

[0039] The lifting guide rail mechanism, together with the ball screw drive assembly, forms a mechanical lifting and positioning system. The mechanical lifting and positioning system has two operation modes: automatic lifting and manual lifting. The manual lifting hand crank wheel is equipped with a manual locking clamp. The ball screw drive assembly is a semi-enclosed aluminum alloy protective cover structure. The lifting platform integrates a limit locking mechanism. The lifting platform and the mixing tank are fixed by limit buckles and a manual switch. A lifting motor and a transmission belt are connected to the ball screw, and the lifting motor is used to provide power output to the ball screw.

[0040] According to some embodiments of the present invention, the vibrating discharge mechanism includes a paddle-type discharge port and an ultrasonic vibration generator. The ultrasonic vibration generator is triggered simultaneously with the start of stirring and the opening of the paddle-type discharge port, so as to realize ultrasonic vibration-assisted stirring, discharge and subsequent cleaning.

[0041] According to some embodiments of the present invention, the belt drive and reduction mechanism and the ball screw drive assembly are all provided with enclosed protective covers, the bottom of the mixing tank is also provided with a manually openable and closeable paddle-type drain port, and a sealing ring is provided at the connection position between the lifting platform and the mixing tank to improve the sealing performance of the enclosed mixing chamber.

[0042] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0043] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein the abstract drawings are to be completely consistent with one of the drawings in the specification:

[0044] Figure 1 This is a side view of the overall structure of the present invention;

[0045] Figure 2 This is a schematic diagram of the overall structure of the cleaning module of the present invention;

[0046] Figure 3 This is a schematic diagram of the honeycomb nozzle structure at the sealing cover of the present invention;

[0047] Figure 4 This is a schematic diagram of the motor reduction mechanism of the present invention;

[0048] Figure 5 This is a schematic diagram of the multi-stage turbulence-causing blade deployment and retraction structure of the present invention;

[0049] Figure 6 This is a schematic diagram of the lifting guide rail mechanism of the present invention;

[0050] Figure 7 This is a schematic diagram of the sealed enclosure and feeding module structure of the present invention;

[0051] Figure 8 This is a schematic diagram of the discharge vibration module of the present invention;

[0052] Figure 9 This is a cross-sectional view of the mixing tank and discharge vibration module of the present invention;

[0053] Figure 10 This is a schematic diagram of the outer casing and control system structure of the present invention.

[0054] Explanation of reference numerals in the attached diagram: 1. Base, 2. Vertical support frame, 3. Motor drive mechanism, 4. Belt drive and reduction mechanism, 4-1. Small pulley, 4-2. Trapezoidal toothed synchronous belt, 4-3. Large pulley, 4-4. Drive shaft, 4-5. Sun gear, 4-6. Planetary gears, 4-7. Planetary carrier, 5. Stirring shaft assembly, 5-1. Main stirring shaft, 5-1-1. Threaded connection hole, 5-1-2. Flat end, 5-2. Central staggered baffle bar, 5-3. Wall scraping secondary blades, 6. Multi-stage baffle stirring blades, 7. Lifting guide rail mechanism, 7-1. Lifting device motor, 7-2. Small pulley 1, 7-3. Trapezoidal toothed synchronous belt, 7-4. Hand crank wheel, 7-5. Locking buckle, 7-6. Large pulley 1, 7-7. Lead screw, 7-8. Double guide rail slider, 7-9. 8. Screw guide rail back cover, 8. Lifting platform, 8-1. Sheet metal support platform, 8-2. Spring, 8-3. Hand switch, 8-4. Photoelectric vibration generator, 9. Sealed enclosure, 10. Mixing tank, 10-1. Male stop, 10-2. Planar limit, 11. Vibrating discharge mechanism, 12. Feeding module, 12-1. Material box, 12-2. Timed and quantitative pump, 12-3. Disposable inlet cup, 12-4. Female stop, 13. Cleaning module, 13-1. Water tank, 13-2. Motor and water pump assembly, 13-3. Sealing cover, 13-3-1. Nozzle, 13-3-2. Inlet and outlet water pipes, 13-3-3. Bearing, 13-3-4. Sealing stop, 14. Control system, 14-1. Electric drive protective shell, 14-2. System control board. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0056] It should be noted that although functional modules are divided in the system diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the system or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0057] Reference Figures 1 to 10 , Figure 1 This is a side view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the cleaning module of the present invention; Figure 3 This is a schematic diagram of the honeycomb nozzle structure at the sealing cover of the present invention; Figure 4 This is a schematic diagram of the motor reduction mechanism of the present invention; Figure 5This is a schematic diagram of the multi-stage turbulence-causing blade deployment and retraction structure of the present invention; Figure 6 This is a schematic diagram of the lifting guide rail mechanism of the present invention; Figure 7 This is a schematic diagram of the sealed enclosure and feeding module structure of the present invention; Figure 8 This is a schematic diagram of the discharge vibration module of the present invention; Figure 9 This is a cross-sectional view of the mixing tank and discharge vibration module of the present invention; Figure 10 This is a schematic diagram of the outer casing and control system structure of the present invention.

[0058] In one embodiment, the ultrasonic-assisted multi-stage turbulence-type cement paste mixer includes: a base 1; a vertical support frame 2 fixedly installed on the base 1; a sealed cover 9 fixedly installed on the vertical support frame 2; a stirring shaft assembly 5 connected to the sealed cover 9, the stirring shaft assembly 5 being driven by a motor for stirring the mixture; a lifting platform 8 slidably installed on the vertical support frame 2, on which a mixing tank 10 is detachably installed, the sealed cover 9 being positioned along the travel path of the mixing tank 10, the lifting platform 8 moving up and down driving the mixing tank 10 to rise and fall, so that the sealed cover 9 cooperates to form a closed stirring chamber; a vibration discharge mechanism 11 is provided at the bottom area of ​​the mixing tank 10, the vibration discharge mechanism 11 being used to assist stirring during the stirring process, prevent edge effects, assist in the discharge of cement paste and reduce residue.

[0059] The control system controls the lifting guide rail mechanism 7 to drive the lifting platform 8 to descend, and adds the weighed cement powder into the mixing tank 10 through the manual powder inlet at the top of the sealed cover 9. The liquid injection volume and injection time are set through the operation panel of the control system, and the timed quantitative pump 12-2 of the feeding module 12 is started to inject water or chemical admixtures into the mixing tank 10 through the automatic liquid inlet, so as to achieve precise liquid-material ratio.

[0060] After feeding, the mechanical lifting and positioning system is activated by the control system. The lifting guide rail mechanism 7 drives the lifting platform 8 to rise, so that the mixing tank 10 and the sealed cover 9 form a closed mixing chamber through the concave-convex stop structure and silicone rubber sealing ring, preventing dust from overflowing during the mixing process. According to the experimental requirements, the mixing mode is selected through the operation panel, and the motor drive mechanism 3 is started. The equipment first premixes at a low speed of 60r / min for 1 minute, and then automatically switches to a high speed of 120r / min for 2 minutes of high-speed reverse mixing. At the same time, the ultrasonic vibration is triggered to assist the mixing process. During the mixing process, the side scraper blades 5-3 extend outward and scrape off the adhering materials in real time against the inner wall of the mixing tank 10. The layered staggered turbulence rods of the multi-stage turbulence mixing blades 6 form a three-dimensional turbulence, realizing the uniform mixing of cement paste.

[0061] After mixing is completed, the motor drive mechanism 3 and the photoelectric vibration generator 8-4 automatically stop running. Then, the paddle-type discharge port at the bottom of the mixing tank 10 is opened outward, and the ultrasonic vibration generator is triggered at the same time. Under the combined action of gravity and ultrasonic vibration, the material flows out quickly from the discharge port. After the discharge is completed, the ultrasonic vibration generator is turned off and the discharge port is closed. Ultrasonic vibration can effectively reduce material residue and eliminates the need for manual cleaning. After the material discharge is completed, the cleaning module 13 is activated by the control system. The motor-pump assembly 13-2 draws water from the water tank 13-1 and delivers it to the honeycomb nozzle 13-3-1 area inside the sealed enclosure 9 through a high-pressure water pipe. The water is sprayed in a 360° high-pressure atomization onto the mixing blades and the inner wall of the mixing tank 10. At the same time, the control system controls the motor drive mechanism 3 to drive the mixing shaft assembly 5 to rotate forward at a low speed of 30 r / min. The rotating mixing blades scrape the tank wall to achieve all-round cleaning. The wastewater after cleaning is discharged through the paddle-type drain port at the bottom of the mixing tank 10. After cleaning is completed, the control system automatically shuts down the cleaning module 13 and controls the lifting platform 8 to descend, performing routine inspection and maintenance on the equipment, thus completing the entire cement paste preparation experimental process.

[0062] This invention utilizes a concave-convex stop structure to form a closed mixing chamber, combined with a sealed feeding structure, fundamentally solving the problem of dust spillage during feeding and mixing, reducing cement material loss, and effectively protecting the laboratory environment and the health of laboratory personnel. Employing a multi-stage staggered flow-disrupting mixing blade structure, a three-dimensional turbulent mixing path is formed. Combined with a liftable mixing tank 10 and wall-scraping auxiliary blades 5-3, dead zones in the mixing are completely eliminated. The wall-scraping auxiliary blades 5-3 can scrape away material adhering to the tank wall in real time, making it particularly suitable for mixing high-viscosity cement paste and cement paste systems containing admixtures, ensuring the uniformity of cement paste mixing and significantly improving the accuracy and repeatability of subsequent experimental data. Equipped with an automatic quantitative liquid injection module, the timed quantitative pump 12-2 enables precise timed and quantitative addition of water and chemical agents, with a flow rate adjustment range of 0-500 mL / min, avoiding human error and ensuring the accuracy of material proportions. It also integrates automatic lifting, automatic mixing, and ultrasonic vibration discharge functions, reducing manual operation steps and significantly improving experimental efficiency.

[0063] This invention features an integrated cleaning module 13, with Teflon anti-stick coating applied to both the blades and the tank wall to reduce slurry adhesion at the source. Combined with 360° high-pressure atomizing spray and blade rotation scraping cleaning, the cleaning method can quickly complete the all-round cleaning of the blades and mixing tank 10 without disassembling the blades, thus completely solving the industry pain point of difficult cleaning of solidified cement.

[0064] An ultrasonic vibration generator is installed at the discharge port to assist in stirring and prevent edge effects. Ultrasonic vibration is triggered synchronously during discharge, with a vibration frequency of 20-40kHz. This effectively reduces material adhesion and residue at the bottom of the mixing tank 10, lowering experimental errors and reducing the tediousness of manual cleaning, thus improving the convenience of experimental operation. A belt drive and planetary gear reduction and torque amplification structure are adopted, significantly reducing vibration and noise during equipment operation. The transmission components are enclosed with protective covers, and the lead screw 7-7 drive assembly uses a semi-enclosed aluminum alloy protective cover structure to effectively prevent dust intrusion that could cause wear or jamming. The mechanical lifting system has both automatic and manual lifting capabilities. Automatic lifting meets the needs of routine experiments, while manual lifting can be used to remove the mixing tank 10 and blades for cleaning and maintenance in case of emergencies. The sealed design of the mixing tank 10 and the lifting platform 8 prevents material leakage and corrosion of the equipment, significantly improving the operational stability and service life of the equipment. The equipment has automatic and manual modes, and parameters such as stirring speed, stirring time, and lifting height can be flexibly switched according to experimental needs. The mixing tank 10 adopts a detachable design, which is convenient for maintenance. It is suitable for various laboratory experiments related to the preparation of cement paste and has broad engineering application prospects and promotion value.

[0065] In one embodiment, the ultrasonic-assisted multi-stage turbulence-type cement paste mixer further includes a cleaning module 13, which includes a water tank 13-1, a motor-pump assembly 13-2, a high-pressure water pipe, and a honeycomb nozzle area 13-3-1 disposed inside a sealed enclosure 9. The motor-pump assembly 13-2 is connected to the interior of the water tank 13-1 via a water pipe. The sealed enclosure 9 is connected to the mixing shaft via a bearing 13-3-3. The motor-pump assembly 13-2 is used to pump water out of the water tank 13-1. 2. The honeycomb nozzle 13-3-1 area is connected to the high-pressure water pipe. The honeycomb nozzle 13-3-1 area is set with three annularly distributed nozzle 13-3-1 areas. The nozzle 13-3-1 is a high-pressure atomizing nozzle 13-3-1 with a spray pressure of 0.3-0.5MPa, realizing 360° high-pressure spray cleaning. The stirring shaft assembly 5 is provided with multi-stage turbulence stirring blades 6 in a staggered manner along the axial direction. The surface of the multi-stage turbulence stirring blades 6 and the inner wall of the stirring tank 10 are coated with a Teflon anti-stick coating with a thickness of 0.1-0.2mm.

[0066] The cleaning module 13 of this invention adopts a combination design of honeycomb nozzle 13-3-1 area and three annularly distributed nozzle 13-3-1 area, combined with a 360° high-pressure spray working mode, completely breaking through the limitation of traditional mixer cleaning that can only cover local areas. The annularly distributed nozzle 13-3-1 layout allows the cleaning water flow to form an all-round spray network inside the mixing tank 10, ensuring that key areas prone to cement slurry residue, such as the mixing shaft, multi-stage turbulence mixing blades 6, and the inner wall and bottom corners of the mixing tank 10, are precisely covered by high-pressure water flow. At the same time, the structural design of the honeycomb nozzle 13-3-1 area further optimizes the water flow distribution, avoids cleaning blind spots, and ensures that all areas inside the mixing chamber can be cleaned evenly and thoroughly, fundamentally solving the problems of cement slurry residue and cross-contamination between different batches of materials in traditional cleaning methods.

[0067] The sealed enclosure 9 and the mixing tank 10 are fitted with a concave-convex stop sealing structure, and the stop contact surface is fitted with a silicone rubber sealing ring to achieve a seal. The top of the sealed enclosure 9 integrates a feeding module 12, which includes a manual powder feed port for adding cement powder and an automatic liquid feed port connected to a timed metering pump 12-2. The flow rate adjustment range of the timed metering pump 12-2 of the automatic liquid feed port is 0-500mL / min, and it is used to quantitatively inject water or chemical admixtures.

[0068] The feeding module 12 integrated at the top of the sealed enclosure 9 is divided into a manual powder feed port and an automatic liquid feed port to adapt to the addition requirements of different materials. The manual powder feed port can flexibly complete the manual addition of cement powder, meeting the feeding requirements of non-standard ratios and small-batch tests. The automatic liquid feed port, which is equipped with a timed and quantitative pump 12-2, can inject water or chemical admixtures in a timed and quantitative manner according to the experimental ratio and production formula, avoiding the problems of metering deviation and inconsistent addition timing that occur when manually adding liquid materials.

[0069] Furthermore, the multi-stage turbulence stirring blades 6 include: main shaft stirring blades, outer wall scraping auxiliary blades 5-3, and a notch structure at the bottom of the main shaft. The multi-stage turbulence stirring blades 6 have multiple layers of staggered turbulence rods 5-2 in the middle, with multiple radial turbulence rods evenly distributed in each layer. Adjacent layers are radially staggered and arranged in layers along the axial direction of the stirring shaft assembly 5. The outer wall scraping auxiliary blades 5-3 adopt a pin-connected stop structure. The gap between the outer wall scraping auxiliary blades 5-3 and the inner wall of the stirring tank 10 can be adjusted to 0.5-1mm. When the stirring shaft assembly 5 rotates forward, the outer wall scraping auxiliary blades 5-3 retract due to inertia. When the stirring shaft assembly 5 rotates in reverse, the outer wall scraping auxiliary blades 5-3 extend due to inertia and fit tightly against the inner wall of the stirring tank 10.

[0070] The multi-stage turbulence mixing blade 6 of this invention combines multi-layer staggered turbulence rods, adjustable gap wall scraping auxiliary blades, and a forward / reverse adaptive structure to optimize performance in terms of mixing uniformity, material utilization, residue prevention, and adaptability, resulting in significant advantages. The mixing blade is equipped with multi-layered centrally staggered turbulence rods 5-2, with multiple radially distributed turbulence rods in each layer and adjacent layers radially staggered. Combined with the notch structure at the bottom of the main shaft, this creates a complex and dead-angle-free multi-stage turbulence field within the mixing chamber, breaking the laminar flow state of the cement paste and enhancing convection and shearing both internally and externally, and vertically. With ultrasonic assistance, it effectively eliminates cement particle agglomeration while avoiding the mixing blind spots common in traditional mixing blades, significantly improving the mixing uniformity of the cement paste and ensuring stable material performance.

[0071] During the low-speed forward premixing stage, the radial angle of the central staggered turbulence bar 5-2 is automatically adjusted to a 30° angle with the stirring shaft to reduce stirring resistance and prevent powder splashing. During the high-speed reverse mixing stage, the angle of the turbulence bar is automatically adjusted to a 90° perpendicular angle with the stirring shaft to maximize the turbulence effect and improve the mixing uniformity of high-viscosity paste.

[0072] Furthermore, it also includes: a motor drive mechanism 3, used to output power to the stirring shaft assembly 5; a belt drive and reduction mechanism 4, which is set at the power output end of the motor drive mechanism 3, and the power output end of the belt drive and reduction mechanism 4 is connected to the stirring shaft assembly 5. The belt drive and reduction mechanism 4 includes a trapezoidal tooth synchronous belt 7-34-2 transmission assembly and a planetary gear reduction and torque amplification structure. The motor drive mechanism 3 is a variable frequency speed control motor, and the belt drive and reduction mechanism 4 realizes two stirring modes: low-speed forward rotation premixing and high-speed reverse rotation uniform mixing.

[0073] The planetary gear reduction and torque amplification structure can effectively amplify the output torque, adapting to the mixing needs of high-viscosity cement paste, avoiding mixing jams and material stagnation. When used with a variable frequency speed control motor, it can achieve dual-mode operation of low-speed forward rotation premixing and high-speed reverse rotation uniform mixing. In the low-speed forward rotation stage, cement powder and liquid materials can be initially mixed smoothly, preventing powder splashing and agglomeration, which meets the requirements of sealed cavity and precise feeding. In the high-speed reverse rotation mode, strong torque and turbulent blades can form a strong turbulent flow field, which, together with ultrasonic action, refines material particles and improves the homogeneity of the paste.

[0074] Furthermore, it also includes: a lifting guide rail mechanism 7, used to drive the lifting platform 8 to lift the mixing tank 10, so as to cooperate with the sealed cover 9 to form a closed mixing chamber; the lifting guide rail mechanism 7, together with the ball screw 7-7 drive assembly, forms a mechanical lifting and positioning system, which has two operation modes: automatic lifting and manual lifting. The manual lifting hand crank wheel 7-4 is equipped with a manual locking clamp. The ball screw 7-7 drive assembly is a semi-enclosed aluminum alloy protective cover structure. The lifting platform 8 integrates a limit locking mechanism. The lifting platform 8 and the mixing tank 10 are fixed together by limit buckles and a hand switch 8-3; a lifting motor 7-1 and a transmission belt are set to connect to the ball screw 7-7. The lifting motor 7-1 is used to provide power output to the ball screw 7-7.

[0075] This invention features both automatic and manual lifting modes. In automatic mode, the ball screw 7-7 is driven by a motor, enabling programmed and automated lifting operations, suitable for batch continuous mixing scenarios, and improving equipment operating efficiency. The manual lifting mode is equipped with a hand crank wheel 7-4 and a manual locking clamp. In case of power failure, equipment malfunction repair, or when precise alignment is required, the height of the mixing tank 10 can be manually adjusted. The locking clamp can fix the lifting position in real time to prevent the platform from accidentally slipping, greatly enhancing the equipment's adaptability to special working conditions and operational safety.

[0076] The vibrating discharge mechanism 11 includes a paddle-type discharge port and an ultrasonic vibration generator. The ultrasonic vibration generator is triggered at the same time as the stirring is started and the paddle-type discharge port is opened, so as to realize ultrasonic vibration-assisted stirring, discharge and subsequent cleaning.

[0077] Furthermore, the belt drive and reduction mechanism 4 and the ball screw 7-7 drive assembly are all equipped with enclosed protective covers. The bottom of the mixing tank 10 is also equipped with a manually openable and closed paddle-type drain port. A sealing ring is installed at the connection position between the lifting platform 8 and the mixing tank 10 to improve the sealing performance of the enclosed mixing chamber.

[0078] In the planetary gear reduction and torque-increasing structure, the first small pulley 4-1 serves as the driving pulley, connected to the output shaft of the variable frequency speed control motor to receive motor power. The trapezoidal tooth synchronous belt 7-34-2 is simultaneously engaged with both the first small pulley 4-1 and the first large pulley 4-3, achieving synchronous power transmission. The first large pulley 4-3 is coaxially and fixedly connected to the transmission shaft 4-4, outputting the power transmitted via the synchronous belt to the subsequent reduction mechanism. The core advantage of this transmission section lies in the use of the trapezoidal tooth synchronous belt 7-34-2. Compared to ordinary flat belts, it achieves slip-free synchronous transmission, precisely controls the speed transmission accuracy, avoids fluctuations in stirring speed caused by transmission slippage, ensures the stability of material mixing during the stirring process, and reduces transmission noise, making it suitable for high-speed, high-frequency stirring operations.

[0079] The planetary gear reduction and torque amplification structure serves as the core of the secondary reduction mechanism, with its components tightly coupled in terms of connection and function: Power input end: The drive shaft 4-4 is fixedly connected to the sun gear 4-5, directly transmitting the power from the synchronous belt drive section to the sun gear 4-5 as the power input source for the planetary gear mechanism; Transmission core: The sun gear 4-5 meshes with multiple evenly distributed planet gears 4-6, and the planet gears 4-6 simultaneously mesh with the internal gear ring on the inner side of the first large pulley 4-3, realizing power diversion and reduction; Power output end: All planet gears 4-6 are rotatably mounted on the planet carrier 4-7, which is fixedly connected to the stirring shaft assembly 5, outputting the reduced and amplified power to the stirring shaft to drive the stirring blades to complete the stirring action.

[0080] The stirring shaft assembly 5 uses the main stirring shaft 5-1 as its core load-bearing base, integrating the central staggered baffle bar 5-2 and the wall-scraping auxiliary blades 5-3. The main stirring shaft 5-1 serves as the skeleton and power transmission channel of the entire assembly, playing a core positioning and load-bearing role. It has a threaded connection hole 5-1-1 at the top, which is bolted to the belt drive and reduction mechanism 4 above, ensuring that power is smoothly transmitted from the motor to the main shaft. The lower part of the main stirring shaft 5-1 has a flat opening 5-1-2 structure for engaging with the bottom vibrating discharge mechanism 11 or the support and limiting assembly to achieve circumferential positioning of the main shaft, preventing radial movement during stirring and ensuring transmission stability. Multiple mounting positions are arranged axially along the shaft body to fix the central staggered baffle bar 5-2 and the wall-scraping auxiliary blades 5-3.

[0081] Among them, the lifting guide rail mechanism 7 uses the lead screw 7-7 as the core transmission carrier to construct a dual-mode lifting system with automatic motor drive and manual emergency operation. The connection logic of each component is clear:

[0082] Automatic drive link: The lifting motor 7-1 serves as the automatic power source, with its output shaft coaxially fixed to the second small pulley 7-2. The second small pulley 7-2 engages with the second large pulley 7-6 via a trapezoidal toothed synchronous belt 7-34-2. The second large pulley 7-6 is coaxially fixed to the top of the lead screw 7-7, converting the motor power into the rotational motion of the lead screw 7-7. Manual operation link: The hand crank wheel 7-4 is installed at the top of the lead screw 7-7, and a locking buckle 7-5 is provided at the hand crank wheel 7-4 for locking the position of the lead screw 7-7 after manual operation. The lead screw 7-7 is installed through the shaft, and the lead screw guide rail cover 7-9 is fixed to the rear side of the lead screw 7-7, forming a semi-enclosed protective structure. Platform bearing link: The lead screw 7-7 and the double guide rail slider 7-8 are threadedly driven together. The double guide rail slider 7-8 is also rigidly connected to the lifting platform 8, converting the rotational motion of the lead screw 7-7 into the linear lifting motion of the slider and the platform.

[0083] The lifting platform 8 includes: a sheet metal support platform 8-1 that supports the mixing tank 10 and moves with the lifting mechanism; a spring 8-2 that ensures vibration buffering and resonance effects; a manual switch 8-3 that enables quick assembly and disassembly of the mixing tank 10; and a photoelectric vibration generator 8-4 that provides vibration-assisted material discharge and signal triggering functions. These four components work together to ensure the platform's load-bearing stability and positioning accuracy during lifting, while also improving mixing and material discharge efficiency through vibration and buffering structures. Furthermore, they simplify the maintenance of the mixing tank 10, making it highly compatible with the automated and efficient operation requirements of the entire machine.

[0084] Among them, the mixing tank 10 uses the tank body as the supporting base, and the male stop 10-1 is integrally formed along the circumference of the tank opening, which is precisely matched with the concave and convex female stop 12-4 structure of the sealed cover 9; the plane limit 10-2 is integrally set at the center of the bottom of the tank, which forms a rigid fit with the positioning structure of the lifting platform 8 and the vibration discharge mechanism 11, so as to realize the precise installation and positioning of the tank body.

[0085] The feeding module 12 includes: a disposable inlet cup 12-3 directly embedded and fixed on the top of the sealed cover 9, communicating with the inside of the mixing tank 10 to form an independent manual feeding channel; a stop female buckle 12-4 integrally formed along the lower edge of the sealed cover 9, which fits into the stop male buckle 10-1 of the mixing tank 10, and achieves a sealed connection with the silicone rubber sealing ring; and a loading box 12-1 independently installed on the side of the equipment, which is connected to the timed and quantitative pump 12-2 and the whole machine control system through a pipeline for parameter setting and operation monitoring.

[0086] The cleaning module 13 is built with the water tank 13-1 as the core of water storage, forming an integrated cleaning system. The water inlet of the motor water pump assembly 13-2 is connected to the bottom of the water tank 13-1 through a pipe to draw clean water from the tank. The water outlet extends to the inside of the sealing cover 13-3 through the inlet and outlet water pipes 13-3-2, forming a high-pressure water transmission channel.

[0087] Spraying and sealing connection: The sealing cover 13-3 serves as the carrier housing for cleaning execution. The nozzle 13-3-1 is installed inside and is connected to the motor water pump assembly 13-2 through the inlet and outlet water pipes 13-3-2 to form a high-pressure water flow delivery path; the sealing stop 13-3-4 is set at the lower edge of the sealing cover 13-3 for precise docking and sealing with the mixing tank 10.

[0088] The present invention also includes a control system 14 for precise control of the water pump, motor components and metering pump. The external components of the control system 14 include a protective shell 14-1 and a system control board 14-2.

[0089] The above is a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present invention.

[0090] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An ultrasonic-assisted multi-stage turbulence-type cement paste mixer, characterized in that, include: Base; A vertical support frame is fixedly installed on the base; A sealed enclosure is fixedly installed on the vertical support frame; A stirring shaft assembly is connected to the sealed cover. The stirring shaft assembly is driven by a motor and is used to stir the mixture. A lifting platform is slidably installed on the vertical support frame. A mixing tank is detachably installed on the lifting platform. A sealed cover is set on the travel path of the mixing tank. The lifting platform moves up and down to drive the mixing tank to rise and fall, so that the sealed cover can cooperate to form a closed mixing chamber. A vibration discharge mechanism is set at the bottom area of ​​the mixing tank. The vibration discharge mechanism is used to assist the mixing during the mixing process, prevent edge effects, assist in the discharge of the slurry and reduce residue. The cleaning module includes: Water tank, motor and pump assembly, high-pressure water pipes, and honeycomb nozzle area located inside the sealed enclosure. The motor-driven water pump assembly is connected to the inside of the water tank via a water pipe, and the motor-driven water pump assembly is used to pump water out of the water tank; The motor-pump assembly is connected to the honeycomb nozzle area via the high-pressure water pipe. The honeycomb nozzle area is provided with three ring-shaped nozzle regions to achieve 360° high-pressure spray cleaning. The stirring shaft assembly has multi-stage turbulence stirring blades arranged in staggered layers along the axial direction, and the surface of the multi-stage turbulence stirring blades and the inner wall of the stirring tank are coated with a Teflon anti-stick coating.

2. The ultrasonic-assisted multi-stage turbulence-type cement paste mixer according to claim 1, characterized in that, The joint between the sealed cover and the mixing tank adopts a concave-convex stop sealing structure, and the stop contact surface is fitted with a silicone rubber sealing ring to achieve a seal. The top of the sealed enclosure integrates a feeding module, which includes: The manual powder inlet is used for adding cement powder, and the automatic liquid inlet is connected to a timed metering pump. The flow rate of the timed metering pump of the automatic liquid inlet is adjustable from 0 to 500 mL / min, and is used for metered injection of water or chemical admixtures.

3. The ultrasonic-assisted multi-stage turbulence-type cement paste mixer according to claim 2, characterized in that, The multi-stage turbulence stirring blades include: main shaft stirring blades, outer wall scraping auxiliary blades and a notch structure at the bottom of the main shaft. The multi-stage turbulence stirring blades have multiple layers of staggered turbulence rods in the middle, and each layer has multiple radial turbulence rods evenly distributed. Adjacent layers are radially staggered and arranged in layers along the axial direction of the stirring shaft assembly. The outer wall scraping auxiliary blade adopts a pin-connected stop structure. The gap between the outer wall scraping auxiliary blade and the inner wall of the mixing tank can be adjusted to 0.5-1mm. When the stirring shaft assembly rotates forward, the outer wall scraping auxiliary blade retracts due to inertia. When it rotates in reverse, the outer wall scraping auxiliary blade extends outward due to inertia and fits tightly against the inner wall of the mixing tank.

4. The ultrasonic-assisted multi-stage turbulence-type cement paste mixer according to claim 3, characterized in that, During the low-speed forward mixing stage, the radial angle of the central staggered baffle rod is automatically adjusted to a 30° angle with the stirring shaft to reduce mixing resistance and prevent powder splashing. During the high-speed reverse mixing stage, the baffle rod angle is automatically adjusted to a 90° perpendicular angle with the stirring shaft to maximize the turbulence effect and improve the mixing uniformity of the high-viscosity paste.

5. The ultrasonic-assisted multi-stage turbulence-type cement paste mixer according to claim 4, characterized in that, Also includes: A motor drive mechanism is used to output power to the stirring shaft assembly; A belt drive and reduction mechanism is provided at the power output end of the motor drive mechanism. The power output end of the belt drive and reduction mechanism is connected to the stirring shaft assembly. The belt drive and reduction mechanism includes a trapezoidal tooth synchronous belt drive assembly and a planetary gear reduction and torque amplification structure. The motor drive mechanism is a variable frequency speed control motor. The belt drive and reduction mechanism realizes two stirring modes: low-speed forward rotation premixing and high-speed reverse rotation uniform mixing.

6. The ultrasonic-assisted multi-stage turbulence-type cement paste mixer according to claim 5, characterized in that, Also includes: The lifting guide rail mechanism is used to drive the lifting platform to lift the mixing tank, so as to cooperate with the sealed cover to form a closed mixing chamber; The lifting guide rail mechanism, together with the ball screw drive assembly, forms a mechanical lifting and positioning system. The mechanical lifting and positioning system has two operation modes: automatic lifting and manual lifting. The hand crank wheel for manual lifting is equipped with a manual locking clamp. The ball screw drive assembly is a semi-enclosed aluminum alloy protective cover structure. The lifting platform integrates a limit locking mechanism. The lifting platform and the mixing tank are fixed together by limit buckles and a manual switch. A lifting motor and a transmission belt are connected to the ball screw, with the lifting motor providing power output to the ball screw.

7. The ultrasonic-assisted multi-stage turbulence-type cement paste mixer according to claim 6, characterized in that, The vibrating discharge mechanism includes a paddle-type discharge port and an ultrasonic vibration generator. The ultrasonic vibration generator is triggered simultaneously with the start of stirring and the opening of the paddle-type discharge port, so as to realize ultrasonic vibration-assisted stirring, discharge and subsequent cleaning.

8. The ultrasonic-assisted multi-stage turbulence-type cement paste mixer according to claim 7, characterized in that, The belt drive and reduction mechanism and the ball screw drive assembly are all equipped with enclosed protective covers. The bottom of the mixing tank is also equipped with a manually openable and closeable paddle-type drain port. The connection position between the lifting platform and the mixing tank is equipped with a sealing ring to improve the sealing performance of the enclosed mixing chamber.

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