Planetary mixer with dispersion disc operating at fixed point at powder inlet position of barrel bottom

Abstract

The utility model relates to a planetary mixer with a dispersion disc operating at a fixed point at a powder inlet at the bottom of a barrel, which comprises a cross beam, a low-speed power device, a high-speed power device, a hollow shaft, a high-speed shaft, a low-speed mixing component, a high-speed dispersion component, a vacuum system, a mixing barrel and a control system, a fixed-point induction piece is installed on the driven chain wheel, and an induction switch is arranged on the cross beam and electrically connected with the control system. And when the fixed-point induction sheet is positioned below the induction switch and is detected by the induction switch, the dispersion disc of one group of high-speed dispersion components is positioned right in front of the powder inlet at the bottom of the stirring barrel. According to the stirrer, the powder inlet is designed at the bottom of the stirring barrel, meanwhile, the sensing device capable of enabling the dispersing disc to operate at a fixed point is designed, the dispersing disc is stopped right in front of the powder inlet, the dispersing disc is started to operate at the moment when powder enters liquid from the powder inlet, flying dust can be obviously reduced, and the utilization rate of the stirrer is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a planetary mixer, especially a planetary mixer with a dispersion disc fixed-point operation at the powder inlet of the barrel bottom. BACKGROUND

[0002] In the chemical, new energy electronic paste and other industries, during conventional production, the powder is delivered into the planetary mixer by pipeline after the liquid is delivered into the planetary mixer, and the powder enters the stirring barrel of the planetary mixer through the powder inlet of the upper barrel by pneumatic conveying or free-fall, but during powder feeding, the dust flies due to factors such as material density, pneumatic conveying mode, internal pressure change of the planetary mixer, etc., resulting in a large amount of dust in the planetary mixer, causing the powder to adhere to the lower part of the planetary box and the inner wall of the upper barrel, so that manual scraping is required after the powder feeding is completed. Moreover, due to the change of the internal pressure of the planetary mixer, the powder is easily delivered into the planetary box, causing the bearings, mechanical seals and other mechanical parts to be covered with dust, greatly reducing the service life of the parts and greatly shortening the equipment maintenance cycle. For some high-demand continuous production industries, it greatly affects the production capacity of a series of subsequent processes.

[0003] During unconventional production, a feeding pipe is inserted into the planetary mixer below the liquid surface, and the powder is fed by pneumatic conveying under negative pressure. This powder feeding method can cause the powder to break through the liquid surface with the gas, also resulting in a large amount of dust in the planetary mixer, causing the same problems as above. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a planetary mixer with a dispersion disc fixed-point operation at the powder inlet of the barrel bottom. The planetary mixer is designed with a powder inlet at the bottom of the stirring barrel, and an inductive device that allows the dispersion disc to operate at a fixed point is designed to stop the dispersion disc in front of the powder inlet. When the powder enters the liquid from the powder inlet, the dispersion disc starts to operate, which can significantly reduce the dust flying and improve the equipment utilization rate.

[0005] The technical solution for solving the above technical problems is: a planetary mixer with a fixed-point operation of a dispersion disc at a powder inlet of a barrel bottom, comprising a crossbeam, a low-speed power device, a high-speed power device, a hollow shaft, a high-speed shaft, a low-speed stirring assembly, a high-speed dispersion assembly, a vacuum system, a stirring barrel in communication with the vacuum system, and a control system for controlling the low-speed power device and the high-speed power device, wherein the high-speed shaft is located in the hollow shaft, a passive chain wheel is installed on the hollow shaft, the high-speed dispersion assembly comprises a dispersion shaft and a dispersion disc installed on the dispersion shaft, a powder inlet is formed in the bottom of the stirring barrel, a fixed-point sensing sheet is installed on the passive chain wheel, a sensing switch for sensing the fixed-point sensing sheet is arranged on the crossbeam, and the sensing switch is electrically connected with the control system; when the fixed-point sensing sheet is located below the sensing switch and is detected by the sensing switch, the dispersion disc of a group of high-speed dispersion assemblies is located in front of the powder inlet of the bottom of the stirring barrel.

[0006] Further, the sensing switch is a proximity switch.

[0007] Further, the sensing sheet is composed of an upper transverse detection sheet, a longitudinal support sheet and a lower transverse mounting sheet, and the lower transverse mounting sheet of the sensing sheet is installed on the passive chain wheel through a sensing sheet screw.

[0008] Further, the sensing switch is supported by a support, and the support is installed on the crossbeam through a support screw.

[0009] Further, a barrel bottom material blocking cylinder is further included, the barrel bottom material blocking cylinder is connected with the powder inlet of the bottom of the stirring barrel through a connecting pipe, the piston of the barrel bottom material blocking cylinder is in an extended state to block the powder inlet, and a barrel bottom material adjusting valve is further connected on the connecting pipe.

[0010] Further, a powder storage tank and a weighing module for weighing the weight of powder in the powder storage tank are further included, and the barrel bottom material adjusting valve is in communication with the powder storage tank through a conveying pipeline.

[0011] Further, a monitoring pressure sensor is installed on the stirring barrel, and the control system adjusts the opening angle of the barrel bottom material adjusting valve in real time according to the pressure in the stirring barrel collected by the monitoring pressure sensor.

[0012] Further, the control system collects the weight of powder in the powder storage tank through the weighing module, and controls the barrel bottom material adjusting valve and the barrel bottom material blocking cylinder to be closed according to the weight of powder.

[0013] Due to the adoption of the above technical solution, the present application has the following beneficial effects:

[0014] 1. The powder is fed from the bottom side of the mixing tank. A sensor is designed to keep the dispersing disc stationary in front of the powder inlet. After the liquid is added to the mixing tank, the powder is pneumatically conveyed through the negative pressure inside the tank, entering the mixing tank from the bottom inlet. The dispersing disc activates the moment the powder enters the liquid. The power provided by the dispersing disc and the liquid flow quickly wet and integrate the powder into the liquid. Compared to methods where the dispersing disc is not activated directly in front of the inlet, this method of activating the dispersing disc directly in front of the inlet mixes the powder and liquid, further reducing the contact between dust inside the mixing tank and the lower and upper inner walls of the planetary gearbox. It also further reduces the impact of dust on the mixer's bearings and seals, improving the equipment's uptime.

[0015] 2. The dispersing disc is positioned directly opposite the powder inlet at the bottom of the container. During operation, it quickly wets the powder and integrates it into the liquid, reducing the contact between the material and the internal parts of the mixer. This further reduces the proportion of unmixed powder, improves material consistency, and enhances production quality.

[0016] 3. Improves the efficiency of powder mixing with liquid during feeding, accelerates the powder-liquid mixing speed in the mixer, indirectly shortens the process mixing time, and improves product production efficiency.

[0017] 4. The powder feeding pipeline is connected to a sealed powder storage tank, and a bottom feeding regulating valve is installed on the pipeline to regulate the feeding flow rate. When the solid-to-gas ratio of the feed in the pipeline is unstable, the pressure in the mixing tank is stabilized, ensuring a stable pressure change rate in the tank and preventing liquid from flowing back into the pipeline, thus improving the stability of the feeding.

[0018] 5. A weighing module is installed to measure the weight of powder in the powder storage tank. Operators can monitor the powder feeding status through the weighing module. The system can automatically determine when the material addition is complete through the weighing module, and automatically open and close the valves and proceed to the next material mixing step.

[0019] The technical features of a planetary mixer with a fixed-point operation of the dispersion disc at the bottom powder inlet of the bucket, as described below, are further explained with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] Figure 1 : A schematic diagram of a planetary mixer with a fixed-point operation of the dispersion disc at the powder inlet at the bottom of the bucket according to this utility model.

[0021] Figure 2 : Figure 1 Enlarged view of part A.

[0022] Figure 3 : Figure 1 Enlarged view of part B.

[0023] Figure 4 Top view of the passive sprocket, fixed-point induction plate and induction switch of this utility model.

[0024] Figure 5 : Schematic diagram of the fixed-point sensing sheet of this utility model.

[0025] Figure 6 : A schematic diagram of the connection between the powder storage tank and the bottom feed regulating valve of this utility model.

[0026] In the diagram: 1-Connecting pipe, 2-Bottom-of-tank blocking cylinder, 3-Bottom-of-tank feed regulating valve, 4-Mixing tank, 41-Powder inlet, 5-High-speed dispersion component, 51-Dispersion shaft, 52-Dispersion disc, 6-Upper tank component, 7-Crossbeam, 8-Drive sprocket, 9-Low-speed power unit, 10-Passive pulley, 11-Passive sprocket, 12-Belt, 13-Drive sprocket, 14-High-speed power unit, 15-Planetary component, 16-Lifting component, 17-Base, 18-Discharge valve, 19-Hollow shaft, 20-High-speed shaft, 21-Induction plate screw, 22-Fixed-point induction plate, 221-Upper transverse detection plate, 222-Longitudinal support plate, 223-Lower transverse mounting plate, 23-Induction switch, 24-Bracket, 25-Bracket screw, 26-Weighing module, 27-Powder storage tank.

[0027] P represents the liquid level. Detailed Implementation

[0028] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] Example 1

[0030] A planetary mixer with a fixed-point dispersing disc at the powder inlet at the bottom of the container, such as... Figures 1-6As shown, the system includes a crossbeam 7, a low-speed power unit 9, a high-speed power unit 14, a hollow shaft 19, a high-speed shaft 20, a low-speed stirring assembly, a high-speed dispersion assembly 5, a planetary component 15, a vacuum system, a stirring tank 4 connected to the vacuum system, and a control system for controlling the operation of the low-speed and high-speed power units. The high-speed shaft 20 is located inside the hollow shaft 19, and a driven sprocket 11 is mounted on the hollow shaft 19. A driving sprocket 8 is mounted on the low-speed power unit 9. The driven sprocket 11 and the driving sprocket 8 are connected by a chain. The high-speed dispersion assembly includes a dispersion shaft 51 and a dispersion disc 52 mounted on the dispersion shaft. The dispersion shaft 51 is connected to the high-speed shaft 20 via a synchronous pulley and a synchronous belt, and is driven to rotate by the high-speed shaft 20. The high-speed shaft 20 is connected to the high-speed power unit 14 via a driven pulley 10, a belt 12, and a driving pulley 13, and is driven by the high-speed power unit 14. The bottom of the mixing tank 4 has a powder inlet 41. A fixed-point sensing plate 22 is installed on the passive sprocket 11. A sensing switch 23 for sensing the fixed-point sensing plate is provided on the crossbeam 7. The sensing switch is electrically connected to the control system. When the fixed-point sensing plate 22 is located below the sensing switch 23 and is detected by the sensing switch, a dispersion disk 52 of a high-speed dispersion component is located directly in front of the powder inlet 41 at the bottom of the mixing tank.

[0031] When the shutdown command is triggered, the low-speed stirring component and the high-speed dispersing component begin to decelerate. Once the rotational speed reaches the preset low-speed operating state, the fixed-point sensor 22 is detected below the induction switch 23. The induction switch 23 sends a signal to the control system, which then controls the shutdown. At this time, the dispersing disc 52 of one of the high-speed dispersing components is positioned directly in front of the powder inlet 41 at the bottom of the mixing tank. This ensures that the dispersing disc 52 will start directly in front of the powder inlet 41 of the mixing tank the next time the machine is started.

[0032] During the research and development process, the applicant of this application discovered that feeding powder into the bottom of the mixer can reduce the adverse effects of dust on the upper bearings and seals of the mixer to a certain extent, but it is not the optimal effect. The optimal effect is to stop the dispersing disc directly in front of the powder inlet. The dispersing disc starts operating the instant the powder enters the liquid from the powder inlet. The power provided by the dispersing disc and the flow of the liquid quickly wet the powder and integrate it into the liquid. Compared with the method of not starting the dispersing disc directly in front of the powder inlet, starting the dispersing disc directly in front of the powder inlet to mix the powder and liquid can further reduce powder and liquid flying and achieve better mixing effect.

[0033] In this embodiment, the inductive switch 23 is a proximity switch. The sensing plate 22 is composed of an integrally formed upper transverse detection plate 221, a longitudinal support plate 222, and a lower transverse mounting plate 223. The lower transverse mounting plate 223 of the sensing plate is mounted on the driven sprocket by sensing plate screws 21. The inductive switch 23 is supported by a bracket 24, which is mounted on a crossbeam by bracket screws 25. As a variation, the shape of the sensing plate and the installation method of the sensing plate and the inductive switch can be adjusted according to the actual situation, as long as the dispersing disc can operate at a fixed point at the feed inlet.

[0034] This embodiment also includes a bottom-blocking cylinder 2, which is connected to the bottom powder inlet 41 of the mixing tank via a connecting pipe 1. When the piston of the bottom-blocking cylinder 2 is extended, it blocks the powder inlet 41. A bottom-feed regulating valve 3 is also connected to the connecting pipe 1. The system also includes a powder storage tank 27 and a weighing module 26 for weighing the powder in the storage tank. The bottom-feed regulating valve 3 is connected to the powder storage tank 27 via a conveying pipe. A pressure sensor is installed on the mixing tank, and the control system adjusts the opening angle of the bottom-feed regulating valve 3 in real time based on the pressure collected by the pressure sensor. The control system collects the weight of the powder in the powder storage tank 27 via the weighing module 26 and controls the bottom-feed regulating valve 3 and the bottom-blocking cylinder 2 to close based on the powder weight.

[0035] Except for the bottom feeding component and the dispersion disc position sensing device (inductive switch and fixed point sensing plate), the structure and connection relationship of other components of this utility model are the same as those of the prior art, and will not be described in detail here.

[0036] Feeding process: During the last shutdown, the induction switch 23 sends a signal to the control system via the fixed-point sensor 22, causing the control system to stop the machine and position the dispersing disc 52 directly in front of the powder inlet 41 of the mixing tank. After the liquid material is added to the mixing tank, the mixing tank is connected to the vacuum system through the breather filter (i.e., dust collector), creating negative pressure inside the mixing tank. The pressure value inside the mixing tank is monitored in real time. When the negative pressure value reaches the set value, the bottom sealing cylinder is opened, and the angle of the bottom feed regulating valve is adjusted to maintain the pressure inside the tank within the set negative pressure range, creating negative pressure in the powder conveying pipeline. A pressure difference is generated between the left and right ends of the powder inlet at the bottom of the mixing tank, pushing the powder and gas to mix and enter the conveying pipeline. The powder is carried into the mixing tank and comes into contact with the previously added liquid. At this time, the high-speed dispersing component is activated separately. The dispersing shaft drives the dispersing disc to rotate. The power provided by the dispersing disc and the flow of liquid quickly wet the powder and integrate it into the liquid. The powder and gas separate inside the mixing tank. The gas is drawn out from the breather filter, and the powder remains inside the mixing tank. After all the powder is delivered to the mixing tank, the bottom sealing cylinder is closed, and the high-speed dispersing component also stops operating simultaneously, thus completing the powder feeding process.

Claims

1. A planetary mixer with a fixed-point dispersing disc at the bottom powder inlet, comprising a crossbeam (7), a low-speed power unit (9), a high-speed power unit (14), a hollow shaft (19), a high-speed shaft (20), a low-speed mixing component, a high-speed dispersing component (5), a vacuum system, a mixing tank (4) connected to the vacuum system, and a control system for controlling the operation of the low-speed power unit and the high-speed power unit, wherein the high-speed shaft is located inside the hollow shaft, a driven sprocket (11) is installed on the hollow shaft (19), and the high-speed dispersing component includes a dispersing shaft (51) and a dispersing disc (52) installed on the dispersing shaft, characterized in that: The bottom of the mixing tank has a powder inlet (41), a fixed-point sensing plate (22) is installed on the passive sprocket (11), and a sensing switch (23) for sensing the fixed-point sensing plate is provided on the crossbeam. The sensing switch is electrically connected to the control system. When the fixed-point sensing plate (22) is located below the sensing switch (23) and is detected by the sensing switch, a dispersion disk (52) of a high-speed dispersion component is located directly in front of the powder inlet (41) at the bottom of the mixing tank.

2. The planetary mixer with a fixed-point operation of the dispersion disc at the powder inlet at the bottom of the bucket according to claim 1, characterized in that: The inductive switch is a proximity switch.

3. A planetary mixer with a fixed-point operation of the dispersion disc at the powder inlet at the bottom of the bucket, as described in claim 1 or 2, characterized in that: The sensing plate is composed of an integrally formed upper transverse detection plate (221), a longitudinal support plate (222), and a lower transverse mounting plate (223). The lower transverse mounting plate of the sensing plate is mounted on the passive sprocket (11) by a sensing plate screw (21).

4. A planetary mixer with a fixed-point operation of the dispersion disc at the powder inlet at the bottom of the drum, as described in claim 1 or 2, characterized in that: The inductive switch (23) is supported by a bracket (24), which is mounted on a crossbeam by bracket screws (25).

5. A planetary mixer with a fixed-point operation of the dispersion disc at the powder inlet at the bottom of the drum, as described in claim 1 or 2, characterized in that: It also includes a bottom blocking cylinder (2), which is connected to the bottom powder inlet (41) of the mixing tank via a connecting pipe (1). When the piston of the bottom blocking cylinder is extended, it blocks the powder inlet. The connecting pipe is also connected to a bottom feeding regulating valve (3).

6. A planetary mixer with a fixed-point operation of the dispersion disc at the powder inlet at the bottom of the drum, as described in claim 5, is characterized in that: It also includes a powder storage tank (27) and a weighing module (26) for weighing the powder in the powder storage tank. The bottom feed regulating valve (3) is connected to the powder storage tank through a conveying pipeline.

7. A planetary mixer with a fixed-point operation of the dispersion disc at the powder inlet at the bottom of the bucket according to claim 6, characterized in that: The mixing tank is equipped with a pressure monitoring sensor, and the control system adjusts the opening angle of the bottom feed regulating valve in real time by monitoring the pressure inside the mixing tank collected by the pressure sensor.

8. A planetary mixer with a fixed-point operation of the dispersion disc at the powder inlet at the bottom of the drum, as described in claim 6, is characterized in that: The control system collects the weight of the powder in the powder storage tank through a weighing module, and controls the bottom feed regulating valve and the bottom blockage cylinder to close based on the powder weight.

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