Stirring device for high solid content slurry

Abstract

This application discloses a stirring device 100 suitable for high-solid content slurry, including a stirring tank body 101, a feed pipe assembly 102 forming a powder inlet 102a, a liquid inlet 102b, and a feed channel communicating with the stirring space; a feed spindle, a feed motor; a feed paddle; further including: a soaking pipe assembly 107 forming a soaking channel communicating with the feed channel; a plurality of soaking paddles rotatably disposed in the soaking channel with the central axis as the axis of rotation; and a plurality of soaking columns disposed between two soaking paddles. Among them, the soaking paddle includes: a connecting shaft portion for forming a non-rotatable connection with the feed spindle; and a paddle blade portion for simultaneously exerting a force along the axial direction and the centrifugal direction of the central axis on the mixture of powder and liquid in the soaking channel when the soaking paddle rotates. The beneficial aspect of this application is that it provides a stirring device suitable for high-solid content slurry that improves the mixing effect by setting soaking paddle blades and soaking columns to cooperate in pre-soaking the powder.

Description

Technical Field

[0001] This application relates to the field of stirring devices, specifically, to a stirring device suitable for high solid content slurry.Technical Background

[0002] In the fields of new energy batteries, food, pharmaceuticals, and chemicals, there are a large number of cases where powder particles and liquid need to be mixed to form slurry. Typically, stirring paddles are used to prepare slurry with medium to low solid content and viscosity.

[0003] In the field of preparing high solid content and high viscosity slurry, powder particles are trending toward finer granularity and have a larger specific surface area, with a large amount of gas adsorbed on their surfaces. This leads to difficulties in wetting the powder in liquid. If the powder and liquid are separately introduced into a mixing container and directly mixed using a stirring paddle, it is difficult to achieve uniform mixing and dispersion, and issues such as layering and agglomeration precipitation are prone to occur. The mixing effect is poor and takes a long time.Summary of the Invention

[0004] The content part of this application is used to briefly introduce the concepts, which will be described in detail in the specific implementation part later. The content part of this application does not aim to identify the key or essential features of the technical solution to be protected, nor does it aim to limit the scope of the technical solution to be protected.

[0005] To solve the technical problems mentioned in the background technology section, some embodiments of this application provide a stirring device suitable for high solid content slurry, including: a stirring tank body forming a stirring space; a feed pipe fitting forming a powder inlet, a liquid inlet, and a feed channel connected to the stirring space; a feed spindle, at least partially disposed in the feed channel; a feed motor for driving the feed spindle to rotate in the feed channel of the feed pipe fitting; a feed paddle disposed in the feed channel to stir the powder entering the feed channel through the powder inlet; wherein the feed paddle is installed on the feed spindle to rotate with the feed spindle; the stirring device also includes: an infiltration pipe fitting forming an infiltration channel connected to the feed channel; a plurality of infiltration paddles rotatably disposed in the infiltration channel around a central axis to stir the mixture of powder and liquid in the infiltration channel when rotating; a plurality of infiltration column members disposed between two infiltration paddles to divide the flow of the mixture of powder and liquid along the infiltration channel at the infiltration column members.

[0006] Furthermore, the infiltration paddle includes: a connecting shaft portion for forming a non-rotatable connection with the feed spindle; a paddle blade portion for simultaneously exerting a force in the axial direction and the centrifugal direction of the central axis on the mixture of powder and liquid in the infiltration channel when the infiltration paddle rotates; wherein the paddle blade portion is provided with a paddle surface that intersects obliquely with the central axis.

[0007] Furthermore, the feed paddle includes: a sleeve portion, for forming a non-rotatable connection with the feed spindle; a spiral portion, configured to extend approximately along a spiral line; a connecting portion, for connecting the spiral portion to the sleeve portion in a spiral manner around the sleeve portion.

[0008] Furthermore, the paddle blade portion of the soaking paddle is arranged symmetrically relative to the central axis.

[0009] Furthermore, the paddle surface of the paddle blade portion is configured with at least one curved surface.

[0010] Furthermore, the paddle surface of the paddle blade portion is divided into a forward paddle surface and a reverse paddle surface, with the forward paddle surface and the reverse paddle surface disposed on opposite sides of the paddle blade portion.

[0011] Furthermore, the paddle blade portion further includes: a transition surface, connecting between the forward paddle surface and the reverse paddle surface; wherein, the transition surface intersects obliquely with the central axis.

[0012] Furthermore, the infiltration column members are disposed between the feed spindle and the infiltration pipe fitting.

[0013] Furthermore, the infiltration column members are configured as cylindrical bodies extending in the radial direction of the central axis.

[0014] Furthermore, the stirring device includes: a soaking ring member, configured with a ring structure and fitted outside the feed spindle; one end of the soaking column is connected to the soaking pipe assembly, and the other end is connected to the soaking ring member.

[0015] Furthermore, the soaking pipe assembly includes a plurality of flange pipes, and the soaking paddle is accommodated in the space enclosed by the flange pipes.

[0016] The beneficial effect of this application is that it provides a stirring device suitable for high solid content slurry that improves the mixing effect by using infiltration paddle blades and infiltration column members to cooperate in pre-wetting the powder.Brief Description of the Drawings

[0017] The attached figures, which constitute a part of this application, are provided to further enhance the understanding of the present invention, making its other features, objectives, and advantages more apparent. The illustrative embodiments and their descriptions in the figures are used to explain the invention and do not constitute improper limitations to it.

[0018] It should be noted that, throughout the figures, identical or similar reference numerals represent identical or similar elements. It is understood that the figures are schematic, and the components and elements are not necessarily drawn to scale.

[0019] In the figures: Figure 1 is an overall schematic diagram of a mixing device according to an embodiment of the present application; Figure 2 is an internal structural schematic diagram of the mixing device shown in Figure 1; Figure 3 is a cross-sectional structural schematic diagram of the feed section in the mixing device shown in Figure 1; Figure 4 is a partial structural schematic diagram of the feed section in the mixing device shown in Figure 1; Figure 5 is a structural schematic diagram of the feed paddle in the mixing device shown in Figure 1; Figure 6 is a structural schematic diagram of the wetting paddle in the mixing device shown in Figure 1; Figure 7 is a structural schematic diagram of the flange tube, wetting column, and wetting ring combined in the mixing device shown in Figure 1; Figure 8 is a schematic diagram of the combined flange tube and its internal structure in the mixing device shown in Figure 1; Figure 9 is a structural schematic diagram of synchronous rotating components such as the dispersion disk in the mixing device shown in Figure 1; Figure 10 is a structural schematic diagram of the overall assembly consisting of the dispersion disk, dispersion column, and guide cone in the mixing device shown in Figure 1; Figure 11 is a top view structural schematic diagram of the dispersion disk in the mixing device shown in Figure 1; Figure 12 is a structural schematic diagram of the cross-sectioned overall assembly consisting of the dispersion disk, dispersion column, and guide cone in the mixing device shown in Figure 1; Figure 13 is a schematic diagram showing the flow direction of slurry inside the mixing tank of the mixing device shown in Figure 1.

[0020] The meanings of the reference numerals in the drawings are as follows: 100 - Mixing device;101 - Mixing tank body; 101a - Mixing space; 101b - Cooling interlayer;1011a - Cooling channel; 101 1b - Liquid inlet;1011c - Liquid outlet; 1011d - Material outlet; 1011 - Outer tank body; 1012 - Inner tank body; 1013 - Liquid inlet pipe; 1014 - Liquid outlet pipe;102 - Feed pipe fitting; 102a - Powder inlet;102b - Liquid inlet;102c - Feed channel;103 - Main stirring shaft; 104 - Feed paddle;1041 - Mounting portion;1042 - Spiral portion;1043 - Connection portion; 105 - Feed main shaft; 1051 - Step portion; 106 - Feed motor; 107 - Wetting pipe fitting; 107a - Wetting channel;1071 - Flange tube;108 - Wetting paddle; 1081 - Shaft connecting portion;1082 - Paddle blade portion;1082a - Forward paddle surface;1082b - Reverse paddle surface;1082c - Transition surface;1082d - Chamfer;109 - Wetting column;110 - Wetting ring;111 - End cover;112 - Bearing seat;113 - Stirring paddle;114 - Gear reducer;115 - Turbulence plate;116 - Dispersion disk;116a - Diversion channel;116b - Installation hole; 116c - Mating inner surface;1161 - Central portion;1166 - Projection;1163 - Second diversion surface;1162 - Paddle block portion;1163 - Forward diversion surface;1164 - Reverse diversion surface;1165 - Connection surface;117 - Dispersion column;1171 - Column top;1172 - Column bottom; 118 - Flow guide cone;1181 - First diversion surface;1031 - Mating outer surfaceDetailed Description of the Invention

[0021] The following will provide a more detailed description of the embodiments of the present disclosure with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be interpreted as being limited to the embodiments described here. Rather, these embodiments are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are intended for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure.

[0022] Additionally, it should be noted that for the purpose of convenience in description, only the parts related to the present application are shown in the drawings. The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.

[0023] In the description of the present application, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" are used to indicate the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings or the conventional orientation or positional relationship when the product is used, and are only for the purpose of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application. Furthermore, in the description of the present application, terms such as "first", "second", etc., are used only for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0024] In the description of the present application, it should also be noted that unless otherwise specified and defined, if terms such as "provided", "installed", "connected", "linked" are used, they should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through intermediate media. For ordinary technicians in this field, the specific meanings of these terms in the context of the present application can be understood based on the specific situation.

[0025] It should be noted that the modifiers "one" and "multiple" mentioned in this application are illustrative rather than restrictive. Technical personnel in this field should understand that unless otherwise specified in the context, they should be interpreted as "one or more."

[0026] Now, the present disclosure will be described in detail with reference to the accompanying drawings and embodiments.

[0027] As shown in Figures 1 to 3, the stirring device 100 suitable for high solid content slurry in this application includes a stirring tank body 101, a feed pipe 102, a stirring paddle 113, a stirring shaft 103, and a stirring motor (not shown in the figure).

[0028] Specifically, the stirring tank body 101 is configured to have a stirring space 101a, and the feed pipe 102 is formed with a powder inlet 102a, a liquid inlet 102b, and the stirring space 101a communicates with a feed channel 102c.Through the feed channel 102c, the powder and liquid are input into the stirring space 101a.

[0029] Specifically, the stirring paddle 113 is rotatably arranged in the stirring space 101a to stir and mix the mixture of powder and liquid in the stirring space 101a evenly. The stirring shaft 103 extends partially into the stirring space 101a and is connected to the stirring paddle 113 in a non-rotatable manner. The stirring shaft 103 rotates around a central axis under the drive (direct or indirect) of the stirring motor, thereby driving the stirring paddle 113 to rotate and stir the mixture of powder and liquid in the stirring space 101a at a high speed. After being mixed evenly, the slurry is output through an outlet 1011d, and the outlet 1011dwhich is kept closed during stirring.

[0030] In actual production, the powder entering the feed channel 102c tends to agglomerate, affecting its passage through the feed channel 102c. If the powder is directly input into the stirring space 101a, it will seriously affect the dispersion efficiency.

[0031] As an optimal solution, as shown in Figures 1 to 4, the stirring device 100 for high solid content slurry of the present application further includes: a feed paddle 104, a feed shaft 105, a feed motor 106, and a reducer 114. The feed shaft 105 extends partially into the feed channel 102c, and the feed motor 106 cooperates with the reducer 114 to drive the feed shaft 105 to rotate in the feed channel 102c. The feed paddle 104 is rotatably arranged in the feed channel 102c and mounted on the feed shaft 105 to rotate with the feed shaft 105, allowing the feed paddle 104 to stir and through the powder inlet 102a, the powder is dispersed into the feed channel 102c..

[0032] As a preferred option, as shown in Figures 2 and 4, the feed pipe 102 is formed with multiple powder inlets 102a,and the powder inlets 102a located at different circumferential positions, allowing simultaneous input of the same or different types of powders. The feed paddle 104 can disperse and uniformly mix the input powders.

[0033] As a specific solution, as shown in Figure 5, the feed paddle 104 comprises a sleeve portion 1041, a spiral portion 1042, and connecting portions 1043. The sleeve portion 1041 is mounted on the feed shaft 105 and connected to the feed shaft 105 through a key to achieve non-rotational cooperation. The feed shaft 105 is formed with a stepped portion 1051 to limit the installation position of the sleeve portion 1041 on the feed shaft 105. The spiral portion 1042 is configured to extend approximately along a spiral line, and several connecting portions 1043 are used to connect the spiral portion 1042 to the sleeve portion 1041 in a spiral manner around the sleeve portion 1041. When the connecting portions 1043 rotate, they cut and mix the powder in the feed channel 102c to achieve uniform mixing. More specifically, multiple sets of the combination of the spiral portion 1042 and the connecting portions 1043 are uniformly arranged around the central axis, improving the cutting efficiency. Both the spiral portion 1042 and the connecting portions 1043 adopt a streamlined structural design with smooth exteriors, reducing resistance to the powder and enabling rapid and uniform mixing of the powder in a small space, with less tendency for the powder to accumulate in the feed channel 102c.

[0034] In the field of preparing high solid content and high viscosity slurries, powders tend to have smaller particle sizes and larger specific surface areas, which adsorb a large amount of gas, leading to difficulties in wetting the powders in liquid and achieving uniform mixing and dispersion. This can easily lead to problems such as stratification and agglomeration precipitation. If the powders are directly input into the stirring space 101a, the mixing effect will be poor, and it will take a long time.

[0035] As an optimal solution, as shown in Figures 2 to 8, the stirring device 100 for high solid content slurry in this application further includes an impregnation pipe 107, several impregnation paddles 108, and several impregnation columns 109.

[0036] As shown in Figures 6 and 7, the impregnation pipe 107 is formed with Aafeed channel 102c that communicates with an impregnation channel 107a.. The impregnation channel 107a is located between the feed channel 102c and the stirring space 101a.

[0037] As shown in Figure 1, the liquid inlet 102b is located at a different axial position from the powder inlet 102a, and the liquid inlet 102b is positioned near the feed channel 102c contains the impregnation channel 107a, allowing the liquid input through the liquid inlet 102b to quickly enter the impregnation channel 107a.

[0038] As shown in Figure 6, the impregnation paddles 108 rotate about a central axis in the impregnation channel 107a. These impregnation paddles 108 are located at different axial positions and are used to stir the mixture of powder and liquid in the impregnation channel 107a when rotating. The axial, radial, and circumferential directions mentioned in this application refer to relative positions with the central axis as the reference.

[0039] Several impregnation columns 109 are arranged between two impregnation paddles 108. The impregnation columns 109 are configured as cylindrical bodies extending in the radial direction of the central axis, allowing the mixture of powder and liquid flowing along the impregnation channel 107a to be diverted at the impregnation columns 109. Specifically, several impregnation columns 108 located between two impregnation paddles 108 are arranged at different circumferential positions, and the impregnation columns 109 are set between the feed shaft 105 and the impregnation pipe 107.

[0040] With the above solution, the mixture of powder and liquid is diverted by multiple impregnation columns 109 under the agitation of the impregnation paddles 108, allowing the mixture to be fully agitated and the liquid to be thoroughly mixed with the powder. After continuous stirring by multiple sets of impregnation paddles 108 and impregnation columns 109, most of the impregnation process can be completed, achieving high impregnation efficiency.

[0041] More specifically, the gap between the impregnation paddles 108 and the impregnation columns 109 ranges from 3mm to 5mm, allowing the mixture of powder and liquid to be squeezed between the impregnation paddles 108 and the impregnation columns 109, accelerating the impregnation process.

[0042] As a more detailed solution, the impregnation paddles 108 include a connecting shaft portion 1081 and a paddle blade portion 1082. The connecting shaft portion 1081 is mounted on the feed shaft 105 and connected to the feed shaft 105 through a key to prevent relative rotation. Multiple impregnation paddles 108 are sequentially mounted onto the feed shaft 105. The connecting shaft portion 1081 of one impregnation paddle 108 near the mounting portion 1041 abuts against the mounting portion 1041, and an end cap 111 is connected to the end of the feed shaft 105 to completely fix the relative position of the mounting portion 1041 and the shaft. The impregnation paddles 108 and the feed paddles 104 are connected to the same feed shaft 105, ensuring that they rotate together. This guarantees that the speed of powder input into the impregnation channel 107a is roughly equivalent to the speed of the mixture output into the stirring space 101a, preventing excessive powder input from causing accumulation in the impregnation channel 107a and excessive mixture output from causing negative pressure spaces or liquid accumulation at the intersection of the impregnation channel 107a and the feed channel 102c. Additionally, this design facilitates metering control.

[0043] The paddle 108 has multiple paddle blade portions 1082 arranged at circumferential positions of the connecting shaft portion 1081, and these paddle blade portions are symmetrically arranged relative to the central axis. Each paddle blade portion 1082 is provided with a paddle surface that intersects the central axis at an angle. Therefore, when the impregnation paddles 108 rotate, they simultaneously exert axial and centrifugal forces on the mixture of powder and liquid in the impregnation channel 107a. The axial force pushes a portion of the mixture towards the impregnation columns 109, while the centrifugal force pushes another portion towards the inner wall of the impregnation pipe 107.

[0044] More specifically, the gap between the paddle blade portions 1082 and the inner wall of the impregnation pipe 107 ranges from 3mm to 5mm. This allows the mixture of powder and liquid to be pushed towards the inner wall of the impregnation pipe 107 by the centrifugal force and squeezed between the paddle blade portions 1082 and the impregnation pipe 107, further accelerating the impregnation process.

[0045] As an even more optimal solution, as shown in Figure 6, the paddle surface of the paddle blade portion 1082 is constructed with at least one curved surface to reduce resistance when the paddle surface comes into contact with the mixture, allowing the mixture to flow smoothly over the paddle surface and accelerating the mixing of the mixture. Specifically, the paddle surface of the paddle blade portion 1082 is divided into a forward paddle surface 1082a and a reverse paddle surface 1082b, which are respectively positioned on opposite sides of the paddle blade portion 1082. The forward paddle surface 1082a exerts a thrust force on the mixture, while the reverse paddle surface 1082b guides the flow of the mixture passing over the paddle blade portion 1082.

[0046] More specifically, the paddle blade portion 1082 also includes a transition surface 1082c, the transition surface 1082c is positioned between the top and bottom of the forward paddle surface 1082a and the reverse paddle surface 1082b, as shown in the figure. The transition surface 1082c intersects the central axis at an angle. With this design, a portion of the mixture pushed by the forward paddle surface 1082a flows towards the transition surface 1082c near the stirring space 101a, where this portion of the mixture is kneaded between the transition surface 1082c and the impregnation column for mixing. Additionally, near the feed channel 102c forms the transition surface 1082c the forward paddle surface 1082a, there is a cutting angle 1082d. During the rotation of the paddle blade portion 1082, the mixture in the impregnation channel 107a is segmented and allowing a portion of the mixture to flow along this side of the transition surface 1082c, further promoting the mixing of the mixture.

[0047] As shown in Figures 3, 7, and 8, as a preferred solution, the impregnation pipe 107 comprises several flange pipes 1071, the flange pipes 1071 are sequentially connected to form the impregnation pipe 107. The impregnation paddles 108 are accommodated in the space enclosed by the flange pipes 1071. With this design, the impregnation paddles 108 and the impregnation pipe 107 can be sequentially mounted onto the feed shaft 105 to complete the installation, making assembly convenient.

[0048] As a preferred solution, the stirring device 100 for high solid content slurry in this application includes an impregnation ring 110, which is constructed with a ring structure and mounted on the outer side of the feed shaft 105. One end of the impregnation column 109 is connected to the impregnation pipe 107, and the other end is connected to the impregnation ring 110. Thus, the impregnation ring 110 connects the impregnation columns 109 at the same axial position into an integral structure, enhancing the stability of the impregnation columns 109.

[0049] As shown in Figure 1, as a preferred solution, the feed pipe 102 is provided with multiple liquid inlet ports 102b,the liquid inlet ports 102b located at different circumferential positions. This design facilitates the simultaneous introduction of the same liquid or different types of liquids, allowing the liquid to be uniformly input into the impregnation pipe in the circumferential direction, enhancing the impregnation efficiency.

[0050] As shown in Figures 3 and 4, as a preferred solution,the feed shaft 105 has a partial length on which a bearing seat 112 is mounted., and the bearing seat 112 is connected to the feed pipe 102. Correspondingly, a reducer 114 is installed on the bearing seat 112. The bearing seat 112 forms an internal space for installing several bearings.

[0051] As shown in Figure 2, when the stirring paddle 113 operates at high speed to stir the mixture of powder and liquid, a lot of heat is generated, and continuous heating to a certain temperature can easily lead to the mixture changing its properties. As a preferred solution, the stirring tank body 101 also forms a cooling jacket 101b, the cooling jacket 101b is constructed with a cooling cavity 1011a, a liquid inlet 1011b, and a liquid outlet 1011c. The cooling cavity 1011a is arranged around the stirring space 101a. The liquid inlet 1011b allows coolant to flow into the cooling cavity 1011a, and the liquid outlet 1011c allows coolant to flow out of the cooling cavity 1011a. The flowing coolant continuously removes excess heat from the stirring space 101a, preventing the temperature from rising and causing the slurry to change its properties. Specifically, the stirring tank body 101 includes an outer tank body 1011 and an inner tank body 1012, and the cooling jacket 101b is constructed between the outer tank body 1011 and the inner tank body 1012.

[0052] More specifically, the stirring tank body 101 includes a liquid inlet pipe 1013 and a liquid outlet pipe 1014. The liquid inlet pipe 1013 forms the liquid inlet 1011b and extends radially to a region close to the central axis, the liquid inlet pipe 1013 extending the residence time of the coolant entering the liquid inlet 1011b leads to the cooling cavity 1011a., fully absorbing heat to improve heat dissipation efficiency.

[0053] As shown in Figures 9 to 12, as a specific solution, the stirring paddle 113 includes a dispersion disk 116, several dispersion columns 117, and a flow guide cone 118. The dispersion disk 116 is constructed with a central portion 1161 and around the central portion 1161, several paddle block portions 1162 are arranged.The central portion 1161 is constructed to be centrally symmetric relative to a central axis.

[0054] Multiple scattered pillars 117 are respectively arranged on the paddle block 1162 to rotate synchronously with the scattered pillars 117. The flow guide cone 118 is arranged at the top of the central portion 1161 and forms a first flow guide surface 1181, guiding the slurry in the upper space of the dispersion disk 116 to flow more smoothly towards the dispersion disk 116, increasing the fluidity of the mixture.

[0055] The dispersion disk 116 drives the dispersion columns 117 to rotate at high speed, forcing the mixture of powder and liquid to be sheared and dispersed by the dispersion columns 117 and thrown at high speed towards the inner wall of the inner tank body 1012. Since the rotational speed in the intermediate region near the central axis on the side of the dispersion columns 117 is low, the mixture in the upper part of the tank space inevitably descends to fill the intermediate region, increasing the fluidity of the mixture in the tank space.

[0056] The dispersion disk 116 is formed with one end of the stirring shaft 103 allows partial insertion into the mounting hole 116b.It has a mating inner surface 116c formed around the dispersion axis. The part of the stirring shaft 103 inserted into the mounting hole 116b is formed with a mating outer surface 1031 around the shaft axis. When the shaft is inserted into the mounting hole 116b and tightened, the mating outer surface 1031 and the mating inner surface 116c form an interference fit to drive the dispersion disk 116 to rotate by friction. In addition, the dispersion disk 116 is connected to the end of the stirring shaft 103 with fasteners to prevent them from separating.

[0057] More specifically, the paddle block portion 1162 is constructed with a positive flow guide surface 1163 and a reverse flow guide surface 1164, the positive flow guide surface 1163 and the reverse flow guide surface 1164 are arranged on opposite sides of one paddle block portion 1162 and both intersect with the central axis at an angle. Between one paddle block portion 1162 and the forward flow guiding surface 1163 is the reverse flow guiding surface 1164 , there is a flow guide channel 116a,and the flow guide channel 116a axially traverses the dispersion disk 116, allowing the dispersion disk 116 to guide at least part of the slurry to the bottom of the dispersion disk 116 when rotating. Specifically, the flow guide surfaces are at least partially constructed as part of a conical surface, enhancing the flow guidance effect of the flow guide surfaces.

[0058] With the above design, when the paddle block portion 1162 rotates, the positive flow guide surface 1163 cuts a portion of the mixture and pushes it towards the bottom of the tank space, promoting the flow of the mixture. The reverse flow guide surface 1164 guides the mixture passing through the flow guide channel 116a.

[0059] As shown in Figures 10 and 11, as a preferred solution, the positive flow guide surface 1163 intersects with the radial direction of the central axis at an angle, and when it rotates, it applies a radial force to the mixture flowing through the flow guide channel 116a to throw out the mixture, increasing the fluidity of the mixture. Specifically, the positive flow guide surface 1163 is constructed as a streamlined curved surface.

[0060] As a preferred solution, the reverse flow guide surface 1164 intersects with the radial direction of the central axis at an angle, guiding part of the mixture flowing through the flow guide channel 116a radially during rotation, thereby increasing the fluidity of the mixture. Specifically, the reverse flow guide surface 1164 is constructed as a streamlined curved surface, which helps reduce resistance.

[0061] As a preferred solution, the projection area of the positive flow guide surface 1163 on a projection plane perpendicular to the central axis is less than or equal to the projection area of the reverse flow guide surface 1164 on the same projection plane. This allows the paddle to gradually compress and guide the mixture when entering the flow guide channel 116a into the bottom of the dispersion disk 116 .

[0062] As a preferred solution, the top of the paddle block portion 1162 is constructed as an arc-shaped surface; the tops of several paddle block portions 1162 are constructed on the same arc-shaped surface. This can further reduce the resistance of the slurry against the dispersion disk 116.

[0063] As shown in Figures 10 and 12, as a preferred solution, the dispersion column 117 includes a column top 1171 and a column bottom 1172, where the column top 1171 is positioned above the paddle block portion 1162, and the column bottom 1172 is positioned below the paddle block portion 1162; the dispersion column 117 has at least a cylindrical surface that is parallel to the central axis.

[0064] As shown in Figures 2 and 13, as a preferred solution, the stirring device 100 further includes turbulence plates 115 and at the inner wall of the stirring tank 101, there are blocks that hinder or restrict the circumferential flow of the slurry driven by the stirring paddle 113.. Several turbulence plates 115 are arranged at different circumferential positions on the inner wall of the stirring tank, and the turbulence plates 115 extend axially. Part of the circumferentially rotating slurry comes into contact with the turbulence plates 115 and climbs upwards under the turbulence plates 115's guidance, avoiding the slurry rotating only circumferentially under the action of the dispersion disk 116 and dispersion column 117, which enhances the up-and-down tumbling of the slurry and improves the stirring effect.

[0065] Optionally, the turbulence plates 115 can be fixed or rotatably installed on the inner wall of the stirring tank. With the rotatable installation, the tilt angle of the turbulence plates 115 can be adjusted, suitable for different dispersion speeds.

[0066] As shown in Figures 9 to 12, the projection of the bottom surface of the dispersion disk 116 on a projection plane perpendicular to the dispersion axis is a straight line segment, and a kneading area is formed between the bottom surface of the dispersion disk 116 and the bottom surface of the inner tank body 1012. When the mixture enters the kneading area, its space suddenly becomes smaller, and the mixture is squeezed and kneaded by the bottom of the dispersion disk 116 and the bottom surface of the inner tank body 1012, improving the mixing effect.

[0067] The positive flow guide surface 1163 and the reverse flow guide surface 1164 are connected by a connecting surface 1165, ensuring a certain distance between the connection points of the positive flow guide surface 1163 and the reverse flow guide surface 1164, thus ensuring the passage of the mixture in the flow guide channel 116a.

[0068] A conical boss 1166 is formed at the central portion 1161, and a flow guide cone 118 is installed on the boss 1166. The boss 1166 forms a second drainage surface 1163 the second drainage surface 1163 with the same cone angle as the first drainage surface, enabling the slurry to flow smoothly from the surface of the flow guide cone 118 to the dispersion disk 116.

[0069] The first drainage surface intersects with the top surface of the dispersion disk 116 to form a drainage outer edge, and the connecting surface 1165 intersects with the top surface of the dispersion disk 116 to form a transition outer edge. At least part of the transition outer edge overlaps with the drainage outer edge, allowing the slurry flowing through the flow guide cone 118 to be directly diverted into the flow guide channel 116a, enhancing the flow effect.

[0070] The above description is only intended to illustrate some preferred embodiments of this disclosure and explain the technical principles involved. It should be understood by those skilled in the art that the scope of invention covered in the embodiments of this disclosure is not limited to the technical solutions formed by specific combinations of the technical features mentioned above, but should also include other technical solutions formed by any combinations of the technical features or their equivalents without departing from the inventive concept. For example, the above features can be replaced with technically similar features disclosed (but not limited to) in the embodiments of this disclosure to form new technical solutions.

Claims

1. A stirring device suitable for high-solid content slurry, including: A stirring tank body, forming a stirring space; A feed pipe assembly, forming a powder inlet, a liquid inlet, and a feed channel communicating with the stirring space; A feed spindle, at least partially disposed in the feed channel of the feed pipe assembly; A feed motor, for driving the feed spindle to rotate in the feed channel of the feed pipe assembly; A feed paddle, disposed in the feed channel to stir the powder entering the feed channel through the powder inlet; Wherein, the feed paddle is installed on the feed spindle to rotate with the feed spindle; characterized by: The stirring device suitable for high-solid content slurry further includes: A soaking pipe assembly, forming a soaking channel communicating with the feed channel; A plurality of soaking paddles, rotatably disposed in the soaking channel around a central axis to stir the mixture of powder and liquid in the soaking channel during rotation; A plurality of soaking columns, disposed between two soaking paddles to divide the flow of the mixture of powder and liquid flowing along the soaking channel at the soaking columns; the soaking columns are set between the feed spindle and the soaking pipe assembly; the soaking columns are configured as cylindrical bodies extending in the radial direction of the central axis.

2. The stirring device suitable for high-solid content slurry according to Claim 1 is characterized by: The soaking paddle includes: A connecting shaft portion, for forming a non-rotatable connection with the feed spindle; A paddle blade portion, for exerting a force simultaneously in the axial direction and the centrifugal direction of the central axis on the mixture of powder and liquid in the soaking channel when the soaking paddle rotates; Wherein, the paddle blade portion is provided with a paddle surface that intersects obliquely with the central axis.

3. The stirring device suitable for high-solid content slurry according to Claim 1 is characterized by: The feed paddle includes: A sleeve portion, for forming a non-rotatable connection with the feed spindle; A spiral portion, configured to extend approximately along a spiral line; A connecting portion, for connecting the spiral portion to the sleeve portion in a spiral manner around the sleeve portion.

4. The stirring device suitable for high-solid content slurry according to Claim 1 is characterized by: The paddle blade portion of the soaking paddle is arranged symmetrically relative to the central axis.

5. The stirring device suitable for high-solid content slurry according to Claim 1 is characterized by: The paddle surface of the paddle blade portion is configured with at least one curved surface.

6. The stirring device suitable for high-solid content slurry according to Claim 1 is characterized by: The paddle surface of the paddle blade portion is divided into a forward paddle surface and a reverse paddle surface, with the forward paddle surface and the reverse paddle surface disposed on opposite sides of the paddle blade portion.

7. The stirring device suitable for high-solid content slurry according to Claim 5 is characterized by: The paddle blade portion further includes: A transition surface, connecting between the forward paddle surface and the reverse paddle surface; Wherein, the transition surface intersects obliquely with the central axis.

8. The stirring device suitable for high-solid content slurry according to Claim 1 is characterized by: The stirring device includes: A soaking ring member, configured with a ring structure and fitted outside the feed spindle; One end of the soaking column is connected to the soaking pipe assembly, and the other end is connected to the soaking ring member.

9. The stirring device suitable for high-solid content slurry according to Claim 1 is characterized by: The soaking pipe assembly includes a plurality of flange pipes, and the soaking paddle is accommodated in the space enclosed by the flange pipes.

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