WO2024255581A1 - Powder-liquid mixing device and pulping system - Google Patents

Abstract

A powder-liquid mixing device (100), comprising a housing (10) and a rotor (20). The housing (10) is internally provided with a chamber (11); the housing (10) is provided with a feeding port and a discharging port (13); and the feeding port and the discharging port (13) are respectively communicated with the chamber (11), so that materials can flow from the feeding port to the discharging port (13). The rotor (20) is rotatably arranged in the chamber (11) around an axis (23) of the rotor (20) so as to mix the materials; the rotor (20) comprises a rotor base body (21) and blades (22) arranged on the outer surface of the rotor base body (21), and the outer surface of the rotor base body (21) and the inner wall surface of the housing (10) are spaced apart to form a material mixing channel (14); and the diameter of the end of the rotor base body (21) distant from the discharging port (13) is smaller than that of the end of the rotor base body (21) proximate to the discharging port (13).

Description

Powder-liquid mixing equipment and pulping system

This disclosure claims the priority of the Chinese patent disclosure filed with the Chinese Patent Office on June 16, 2023, with application number 202310722000.1 and application name “Powder-liquid mixing equipment and pulping system”, and the priority of the Chinese patent disclosure filed with the Chinese Patent Office on June 16, 2023, with application number 202321551397.4 and application name “Powder-liquid mixing equipment and pulping system”, the entire contents of which are incorporated by reference in this disclosure.

Technical Field

The present disclosure relates to the technical field of material production and processing, and more specifically, to a powder-liquid mixing device and a pulping system having the powder-liquid mixing device.

Background Art

In the related art, powder-liquid mixing equipment can utilize a rotor with blades to rotate to shear materials and achieve mixing of multiple materials. The rotor base of the existing rotor is usually cylindrical, which makes it difficult to guide the material to flow along the surface of the rotor base. During the rotation of the rotor, the material close to the surface of the rotor base is in a free fall state. During the falling process, the material is easily mixed with more air to form bubbles. When the high-speed rotating blades encounter the bubbles, they will break the bubbles and produce noise. In addition, the high-speed rotation of the rotor will cause the material to adhere to the inner wall of the chamber of the powder-liquid mixing equipment and flow downward, thereby forming a certain cavity area on the outer surface of the rotor base, which may further increase the air content in the material.

Summary of the invention

One purpose of the present disclosure is to provide a new technical solution for powder-liquid mixing equipment, which can at least solve one of the problems of poor material fluidity and high mixing noise in the powder-liquid mixing equipment in the prior art.

Another object of the present disclosure is to provide a pulping system, comprising the above-mentioned powder-liquid mixing device.

According to a first aspect of the present disclosure, a powder-liquid mixing device is provided, comprising: a shell, a chamber is arranged in the shell, the shell has a feed port and a discharge port, the feed port and the discharge port are respectively connected to the chamber so that the material flows from the feed port to the discharge port; a rotor, the rotor is rotatably arranged in the chamber around its own axis to mix the material, the rotor comprises a rotor base and blades arranged on the outer surface of the rotor base, the outer surface of the rotor base is spaced apart from the inner wall surface of the shell to form a mixing channel; wherein the rotor The diameter of one end of the sub-base away from the discharge port is smaller than the diameter of one end of the rotor base close to the discharge port.

Optionally, the axis of the rotor extends from the feed port toward the discharge port, and in the axial direction of the rotor, the diameter of the rotor base gradually increases from the feed port toward the discharge port.

Optionally, the outer contour of the rotor base is streamlined.

Optionally, the rotor base includes: a plurality of frustums, the plurality of frustums are arranged along the axial direction of the rotor, the diameter of the end of each frustum away from the discharge port is smaller than the diameter of the end of the frustum close to the discharge port; a conical cap, the conical cap is arranged at the end of the plurality of frustums away from the discharge port, the diameter of the end of the conical cap away from the discharge port is smaller than the diameter of the end of the conical cap close to the discharge port, and the plurality of frustums and the conical cap rotate synchronously around the axis of the rotor.

Optionally, a generatrix of at least one of the truncated cones is an arc line, and the arc line protrudes outward from the truncated cone.

Optionally, there is a smooth transition between the outer surfaces of adjacent frustums, and there is a smooth transition between the outer surface of the cone cap and the outer surface of the adjacent frustum.

Optionally, the angle between the generatrix of the frustum closest to the discharge port among the multiple frustums and its own axis is 1.5° to 15°.

Optionally, the angle between the generatrix of the frustum closest to the discharge port among the multiple frustums and its bottom surface is 75° to 88°.

Optionally, the taper of the frustum among the multiple frustums that is closest to the discharge port is smaller than the taper of the frustum that is farthest from the discharge port among the multiple frustums.

Optionally, the end of the conical cap away from the discharge port is formed as a rounded structure, and the end of the conical cap close to the discharge port is formed as a cylindrical end. The conical cone adjacent to the conical cap among the multiple conical cones is provided with a mounting groove on a side surface of the conical cap, and the cylindrical end extends into the mounting groove.

Optionally, a plurality of blades are provided on the outer circumferential surface of each of the frustums, and each of the frustums and the corresponding plurality of blades cooperate to form a frustum impeller, and the number of the frustum impellers is 4 to 12.

Optionally, the cross-sectional area of one end of the mixing channel away from the material discharge port is larger than the cross-sectional area of one end of the mixing channel close to the material discharge port.

Optionally, in the direction from the feed inlet to the discharge outlet, the cross-sectional area of the mixing channel gradually decreases, so that the pressure in the mixing channel gradually increases from the feed inlet to the discharge outlet.

Optionally, the powder-liquid mixing equipment also includes: a pumping impeller, which is accommodated in the chamber and coaxially arranged at one end of the rotor close to the discharge port, the pumping impeller is rotatable around its own axis, the pumping impeller includes a pumping base and a plurality of blades, the outer surface of the pumping base smoothly transitions with the outer surface of the rotor base, and the diameter of the pumping base gradually increases in the direction from the feed port toward the discharge port.

Optionally, the powder-liquid mixing equipment is a slurry mixer.

According to a second aspect of the present disclosure, there is provided a pulping system comprising the powder-liquid mixing device described in any one of the above embodiments.

According to the powder-liquid mixing device disclosed in the present invention, the rotor base of the rotor cooperates with the inner wall surface of the shell to define the mixing The material channel allows the materials to be mixed in the mixing channel, and then the diameter of the end of the rotor base away from the discharge port is smaller than the diameter of the end of the rotor base close to the discharge port. Compared with the traditional cylindrical rotor base, the shape of the rotor base disclosed in the present invention is conducive to guiding the material to flow toward the discharge port, and at the same time, it can achieve pressurization in the direction from the feed port to the discharge port to prevent the material from returning. In addition, the powder-liquid mixing device disclosed in the present invention can also reduce the air content inside the material during the flow of the material from the feed port to the discharge port to avoid causing noise, and the blades have a better effect of breaking up the agglomerates during the rotation process, which is conducive to the full mixing of the material.

Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present disclosure will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG1 is a front view of a rotor base and a pumping impeller of a powder-liquid mixing device according to an embodiment of the present disclosure;

FIG2 is a perspective view of a rotor and a pumping impeller of a powder-liquid mixing device according to an embodiment of the present disclosure;

3 is a schematic diagram of the outer contour of the rotor step of a powder-liquid mixing device guiding the flow of materials according to an embodiment of the present disclosure;

FIG4 is a front view of a cone cap of a powder-liquid mixing device according to an embodiment of the present disclosure;

FIG5 is a front view of a truncated table of a powder-liquid mixing device according to an embodiment of the present disclosure;

6 is a partial cross-sectional view of a pumping impeller of a powder-liquid mixing device according to an embodiment of the present disclosure;

FIG7 is a schematic diagram of the coordination of a housing, a rotor and a pumping impeller of a powder-liquid mixing device according to an embodiment of the present disclosure;

FIG8 is a schematic diagram of a mixing channel of a powder-liquid mixing device according to an embodiment of the present disclosure;

FIG9 is a schematic diagram of a powder-liquid mixing device performing mixing through a mixing channel according to an embodiment of the present disclosure;

FIG10 is an enlarged view of the circled portion at A in FIG9 ;

FIG. 11 is a perspective view of a powder-liquid mixing device according to an embodiment of the present disclosure.

Description of reference numerals:

Powder-liquid mixing equipment 100;

Shell 10; chamber 11; first feed port 121; second feed port 122; discharge port 13; mixing channel 14; powder area 141; liquid area 142; powder-liquid mixing area 143; slurry area 144;

Rotor 20; rotor base 21; truncated cone 211; generatrix 2111; cone cap 212; fillet structure 2121; cylindrical end 2122; blade 22; axis 23; outer contour 24;

Pumping impeller 30; pumping base 31; arc surface 311; blade 32;

A driving member 40;

Transmission mechanism 50;

First pressure impeller 1; powder dispersion impeller 2; second pressure impeller 3; powder-liquid mixing pressure impeller 4; first Slurry dispersion impeller 5; second slurry dispersion impeller 6.

DETAILED DESCRIPTION

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless otherwise specifically stated.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

The powder-liquid mixing device 100 according to an embodiment of the present disclosure will first be described in detail below with reference to the accompanying drawings.

As shown in FIGS. 1 to 11 , the powder-liquid mixing device 100 according to an embodiment of the present disclosure includes: a housing 10 and a rotor 20 .

Specifically, a chamber 11 is provided in the housing 10, and the housing 10 has a feed port and a discharge port 13, which are respectively connected to the chamber 11 so that the material flows from the feed port to the discharge port 13. The rotor 20 is rotatably arranged in the chamber 11 around its own axis 23 to mix the material, and the rotor 20 includes a rotor base 21 and blades 22 arranged on the outer surface of the rotor base 21. The outer surface of the rotor base 21 is spaced apart from the inner wall surface of the housing 10 to form a mixing channel 14. The diameter of the end of the rotor base 21 away from the discharge port 13 is smaller than the diameter of the end of the rotor base 21 close to the discharge port 13.

In other words, the powder-liquid mixing device 100 according to the embodiment of the present disclosure is mainly composed of a housing 10 and a rotor 20. The powder-liquid mixing device 100 can be used to mix materials including but not limited to two materials. For example, the powder-liquid mixing device 100 can mix a powdered material with a liquid material to form a slurry after mixing.

The housing 10 of the powder-liquid mixing device 100 defines a chamber 11, and the mixing process can be performed in the chamber 11. The housing 10 can have a feed port and a discharge port 13. Optionally, there can be multiple feed ports, and multiple materials can enter the chamber 11 through different feed ports, and the materials can be discharged from the discharge port 13 after mixing.

For example, there can be two feed ports, namely the first feed port 121 and the second feed port 122. Powdered materials can enter the chamber 11 from the first feed port 121, and liquid materials can enter the chamber 11 from the second feed port 122. The mixed slurry can be discharged from the discharge port 13.

The feed port may be disposed above the discharge port 13 so that the material can flow from the feed port to the discharge port 13 under the action of its own gravity.

The chamber 11 may be provided with a rotor 20, which may rotate about its own axis 23. The rotor 20 may be connected to a driving member 40, for example, the rotor 20 may be connected to a driving motor, and the driving motor drives the rotor 20 to rotate. The rotor 20 rotates in the chamber 11, and the materials may be stirred to mix a variety of materials.

The rotor 20 may be mainly composed of a rotor base 21 and a plurality of blades 22. The rotor base 21 may rotate around the axis 23 of the rotor 20, and a plurality of blades 22 may be provided on the outer surface of the rotor base 21, and the plurality of blades 22 and the rotor base 21 may rotate synchronously. The rotation of the plurality of blades 22 may achieve mixing of materials.

A mixing channel 14 may be formed between the outer surface of the rotor base 21 and the inner wall of the housing 10. For ease of explanation, the direction from the feed port toward the discharge port 13 may be defined as the positive direction of the first direction. In the first direction, the mixing channel 14 may have a first end and a second end, the first end of the mixing channel 14 being away from the discharge port 13, and the second end of the mixing channel 14 being close to the discharge port 13.

In the first direction, the end of the rotor base 21 away from the discharge port 13 may be the first end of the rotor base 21, and the end of the rotor base 21 close to the discharge port 13 may be the second end of the rotor base 21. In the positive direction of the first direction, the diameter of the first end of the rotor base 21 may be smaller than the diameter of the second end of the rotor base 21, so as to realize pressurization in the direction from the feed port to the discharge port 13 to prevent the material from returning.

Therefore, according to the powder-liquid mixing equipment 100 provided by the embodiment of the present disclosure, the rotor base 21 of the rotor 20 cooperates with the inner wall surface of the outer shell 10 to define a mixing channel 14, so that the materials can be mixed in the mixing channel 14, and then the diameter of the end of the rotor base 21 away from the discharge port 13 is smaller than the diameter of the end of the rotor base 21 close to the discharge port 13. Compared with the traditional cylindrical rotor base 21, the shape of the rotor base 21 disclosed in the present disclosure is conducive to guiding the material to flow toward the discharge port 13, and at the same time, it can achieve pressurization in the direction from the feed port to the discharge port 13 to prevent the material from returning.

In addition, the powder-liquid mixing equipment 100 disclosed in the present invention utilizes a structure in which the rotor base 21 has a small diameter at the end away from the discharge port 13 and a large diameter at the end close to the discharge port 13. This can also reduce the air content inside the material during the flow of the material from the feed port to the discharge port 13 to avoid causing noise, and the blades 22 have a better effect of breaking up agglomerates during rotation, which is conducive to the full mixing of the material.

In some specific embodiments of the present disclosure, the axis 23 of the rotor 20 extends from the feed port toward the discharge port 13 , and in the axial direction of the rotor 20 , the diameter of the rotor base 21 gradually increases from the feed port toward the discharge port 13 .

Specifically, the axis 23 of the rotor 20 may extend along a first direction. For example, as shown in FIG. 7 , the first direction is a vertical direction. The axis 23 of the rotor 20 may extend along the vertical direction. The cross section of the rotor base 21 may be a cross section.

In the positive direction of the first direction, the diameter of the rotor base 21 can be gradually increased, so that the cross-sectional area of the rotor base 21 can be gradually increased, so that the cross-sectional area of the mixing channel 14 is gradually reduced, thereby achieving pressurization in the direction from the feed port to the discharge port 13 to prevent the material from returning. At the same time, the air content inside the material is reduced to avoid noise, and the material is mixed more fully.

As shown in FIG9 , the powdered material can enter the powder area 141 of the mixing channel 14 through the first feed port 121, and the powder area 141 is located above the first feed port 121. The liquid material enters the chamber 11 through the second feed port 122, and the liquid material is located in the liquid area 142 before entering the second feed port 122. The powdered material and the liquid material are mixed in the powder-liquid mixing area 143 of the mixing channel 14, and the powder-liquid mixing area 143 is located below the second feed port 122. The slurry formed after mixing is located in the slurry area 144, and the slurry area 144 is located on the first side of the powder-liquid mixing area 143, and the slurry area 144 can be connected to the discharge port 13.

As shown in FIG10 , L1 is the distance between the outer surface of the rotor base 21 and the inner wall of the housing 10, and L2 is the difference between the distance between the conventional rotor base 21 and the inner wall of the housing 10 and L1. P1 is the pressure between the rotor base 21 and the inner wall of the housing 10, and P2 is the pressure between the conventional rotor base 21 and the inner wall of the housing 10. By adopting the rotor base 21 of this embodiment, the space where the material flows through can be reduced compared with the conventional structure, and P1>P2 forms a pressure difference. Combined with the powder-liquid mixing area 143 shown in FIG9 , after the pressure above the powder-liquid mixing area 143 increases, the material in the powder-liquid mixing area 143 will not return upwards compared with the pressure area corresponding to P2.

According to some optional embodiments of the present disclosure, the outer contour 24 of the rotor base 21 is streamlined. For example, the outer contour 24 of the rotor base 21 may be parabolic.

It should be noted that the rotor base 21 may be the portion of the rotor 20 excluding the blades 22 , and the outer contour 24 of the rotor base 21 may be the contour of the portion of the rotor 20 excluding the blades 22 .

Specifically, the orthographic projection of the rotor base 21 in a plane parallel to its own axis has an outer edge, which may include a first edge and a second edge. The first edge may correspond to the bottom surface of the rotor base 21, and the bottom surface of the rotor base 21 may be a plane perpendicular to the axis of the rotor base 21, so the first edge may be a straight line. The second edge The first edge may correspond to a surface of the rotor base 21 except the bottom surface, and the second edge may be formed as an outer contour 24 of the rotor base 21. The material may flow downward along the outer contour 24 of the rotor base 21.

Setting the outer contour 24 of the rotor base 21 to be streamlined can improve the overall flow kinetic energy of the material when it flows along the outer surface of the rotor base 21. When the rotor 20 rotates at a constant speed, the shear rate on the side of the rotor base 21 can gradually increase along the streamline curve, thereby gradually increasing the shear effect on the material, so that the dispersion and flow effect of the material are better.

When the material flows along the streamlined outer contour 24 of the rotor base 21, it conforms to the fluid flow characteristics, so that the material can fit the outer surface of the rotor base 21 without generating any extra gaps, thereby avoiding the mixing of extra air in the material and reducing the number of bubbles in the material. When the blades 22 shear the material during the rotation process, fewer bubbles are destroyed, which is beneficial to reducing the noise generated by the mixing.

According to some other embodiments of the present disclosure, the rotor base 21 includes: a plurality of frustums 211 and conical caps 212 .

The plurality of truncated cones 211 are arranged along the axis 23 of the rotor 20, and the diameter of the end of each truncated cone 211 away from the discharge port 13 is smaller than the diameter of the end close to the discharge port 13. The cone cap 212 is provided at the end of the plurality of truncated cones 211 away from the discharge port 13, and the diameter of the end of the cone cap 212 away from the discharge port 13 is smaller than the diameter of the end of the cone cap 212 close to the discharge port 13. The plurality of truncated cones 211 and the cone cap 212 rotate synchronously around the axis 23 of the rotor 20.

Specifically, the rotor base 21 can be mainly composed of a plurality of truncated cones 211 and cone caps 212. The cooperation of the plurality of truncated cones 211 and cone caps 212 can form the rotor base 21 into a cone-like body. The plurality of truncated cones 211 and cone caps 212 can rotate synchronously.

A plurality of truncated cones 211 may be stacked together along a first direction. In the first direction, a first end of each truncated cone 211 is away from the discharge port 13, and a second end of each truncated cone 211 is close to the discharge port 13. The diameter of the first end of each truncated cone 211 is smaller than the diameter of the second end of each truncated cone 211.

The cone cap 212 can be arranged at one end of the plurality of cones 211 away from the discharge port 13. For example, the cone cap 212 can be connected to the upper end surface of a cone 211 farthest from the discharge port 13 among the plurality of cones 211. The cone cap 212 can be a cone-like body. The end of the cone cap 212 away from the discharge port 13 can be the first end of the cone cap 212, and the end of the cone cap 212 close to the discharge port 13 can be the second end of the cone cap 212. The diameter of the first end of the cone cap 212 can be smaller than the diameter of the second end of the cone cap 212, so as to cooperate with the plurality of cones 211 to realize that the diameter of the rotor base 21 in the positive direction of the first direction gradually increases, so as to achieve the purpose of positive pressure, reducing bubbles and uniform mixing.

In some optional embodiments, each frustum 211 and cone cap 212 may be processed in sections, and a plurality of frustums 211 and cone caps 212 may be assembled to form a rotor base 21 , and blades 22 may be mounted on the rotor base 21 to form a rotor 20 . Optionally, there may be various types of blades 22 according to different functional requirements, and the same or different blades 22 may be installed on different truncated cones 211 .

The upper and lower surfaces of the processed truncated cone 211 are flat, and the parallelism of the two is within a preset range. The upper and lower surfaces of the truncated cone 211 can be circular, and the deviation of the diameter of the upper and lower surfaces of the truncated cone 211 can be controlled within a deviation range of ±0.05 mm, so that after the plurality of truncated cones 211 and the cone caps 212 are assembled into the rotor base 21, the outer surface of the rotor base 21 is an approximately smooth curved surface.

According to some optional embodiments of the present disclosure, a generatrix 2111 of at least one truncated cone 211 is an arc line, and the arc line protrudes outward from the truncated cone 211 .

Specifically, the cross section obtained by cutting the truncated cone 211 along any plane where the axis 23 of the rotor 20 is located can be approximated to a trapezoid, and the outer contour 24 line between the upper base and the lower base of the trapezoid can be the generatrix 2111 of the truncated cone 211. The generatrix 2111 of the truncated cone 211 can be an arc line, and the arc line can protrude toward the outside of the truncated cone 211. The arc line can be designed as a large radius arc so that the arc line can be approximated to a straight line.

By setting the generatrix 2111 of the truncated cone 211 as an arc line, it is beneficial to make the outer contour 24 of the rotor base 21 streamlined, so that the overall flow kinetic energy of the material flowing along the outer surface of the rotor base 21 is better.

In some specific embodiments of the present disclosure, there is a smooth transition between the outer surfaces of adjacent cones 211, and a smooth transition between the outer surface of the conical cap 212 and the outer surface of the adjacent cone 211, which is conducive to achieving a streamlined design of the outer contour 24 of the rotor base 21 and avoiding the formation of a sharp turning point on the outer surface of the rotor base 21 that affects the fluidity of the material.

According to some optional embodiments of the present disclosure, the angle between the generatrix 2111 of the truncated cone 211 closest to the discharge port 13 among the multiple truncated cones 211 and its own axis is 1.5° to 15°.

As shown in FIG1 , the axis of the truncated cone 211 coincides with the axis 23 of the rotor 20. The angle between the generatrix 2111 of the bottommost truncated cone 211 and the axis 23 of the rotor 20 is β, and the value of β is 1.5° to 15°. Compared with the vertically extending outer surface of the conventional cylindrical rotor base 21, when β is within the above range, the outer surface of the rotor base 21 can form a relatively gentle inclined surface, which is conducive to controlling the pressure at various locations of the mixing channel 14 within a reasonable range, and avoiding excessive pressure in the mixing channel 14, resulting in poor flow or material blockage.

Optionally, when the busbar 2111 is an arc, the angle between the busbar 2111 and the axis of the cone 211 can be the angle between the tangent of the point where the busbar 2111 is closest to the discharge port 13 and the axis of the cone 211, or the angle between the line between the two endpoints of the busbar 2111 and the axis of the cone 211.

According to some other embodiments of the present disclosure, the angle between the generatrix 2111 of the truncated cone 211 closest to the discharge port 13 among the multiple truncated cones 211 and its bottom surface is 75° to 88°.

As shown in Fig. 1, the angle between the generatrix 2111 of the bottommost truncated cone 211 and its bottom surface can be α, and the value of α is 75° to 88°. When α is within this range, the outer surface of the rotor base 21 can form a relatively gentle inclined surface, which is conducive to controlling the pressure at various locations of the mixing channel 14 within a reasonable range, and avoiding excessive pressure in the mixing channel 14 resulting in poor flow or material blockage.

Optionally, when the busbar 2111 is an arc, the angle between the busbar 2111 and the bottom surface of the cone 211 can be the angle between the tangent of the point where the busbar 2111 is closest to the discharge port 13 and the bottom surface of the cone 211, or the angle between the line between the two endpoints of the busbar 2111 and the bottom surface of the cone 211.

In some specific embodiments of the present disclosure, the taper of the frustum 211 closest to the discharge port 13 among the multiple frustums 211 is smaller than the taper of the frustum 211 farthest from the discharge port 13 among the multiple frustums 211 .

Specifically, the taper of the truncated cone 211 may be the ratio between the diameter difference between the upper and lower bottom surfaces of the truncated cone 211 and the height of the truncated cone 211. The greater the taper of the truncated cone 211, the smaller the inclination angle of the generatrix 2111 of the truncated cone 211 relative to its bottom surface.

As shown in FIG1 , the taper of the topmost cone 211 is smaller than the taper of the bottommost cone 211, so that the outer contour 24 of the rotor base 21 can be formed into a shape approximately parabolic as shown in FIG3 , so that the flow kinetic energy of the material when flowing along the outer surface of the rotor base 21 is better, which conforms to the fluid flow characteristics, is conducive to reducing bubbles in the material, and reduces the noise generated by mixing.

According to some optional embodiments of the present disclosure, the end of the conical cap 212 away from the discharge port 13 is formed as a rounded structure 2121, and the end of the conical cap 212 close to the discharge port 13 is formed as a cylindrical end 2122. Among the multiple conical cones 211, the conical cone 211 adjacent to the conical cap 212 is provided with a mounting groove facing one side of the conical cap 212, and the cylindrical end 2122 extends into the mounting groove.

As shown in FIG4 , the first end of the cone cap 212 may be a rounded structure 2121, and the rounded structure 2121 may have a spherical surface facing the first feed port 121. The second end of the cone cap 212 may be a cylindrical end 2122, and the upper surface of the topmost frustum 211 may be provided with a mounting groove, which may be adapted to the cylindrical end 2122, and the arc end may be inserted into the mounting groove to achieve assembly of the cone cap 212 and the frustum 211.

In this embodiment, the first end of the cone cap 212 is provided with a rounded structure 2121, so that the surface of the cone cap 212 can be formed into a smooth surface, which is conducive to the smooth flow of materials along the surface of the cone cap 212 and conforms to the fluid flow characteristics. The second end of the cone cap 212 is provided with a cylindrical end 2122, which is conducive to the clamping processing between the cone cap 212 and the round table 211.

According to some other embodiments of the present disclosure, a plurality of blades 22 are provided on the outer circumferential surface of each cone 211 , and each cone 211 and the corresponding plurality of blades 22 cooperate to form an impeller of the cone 211 , and the number of the impellers of the cone 211 is 4 to 12.

Specifically, the rotor 20 may include a plurality of truncated cone 211 impellers, each of which may be composed of a truncated cone 211 and a plurality of blades 22. The number of truncated cone 211 impellers may be 4 to 12. A number less than 4 may result in poor mixing effect, and a number greater than 12 may result in the powder-liquid mixing device 100 being too complicated and costly. Setting the number of truncated cone 211 impellers to 4 to 12 may simplify the powder-liquid mixing device 100 and reduce the cost of the powder-liquid mixing device 100 while ensuring sufficient mixing.

For example, as shown in FIG1 , the number of impellers of the truncated cone 211 may be 6. The 6 impellers of the truncated cone 211 may be, from top to bottom, the first pressure-feeding impeller 1, the powder dispersion impeller 2, the second pressure-feeding impeller 3, the powder-liquid mixing pressure-feeding impeller 4, the first slurry dispersion impeller 5, and the second slurry dispersion impeller 6. A plurality of blades 22 may be provided on the cone cap 212, and the cone cap 212 and the corresponding blades 22 may cooperate to form a stirring and dispersing wheel. Among them, the first pressure-feeding impeller 1, the powder dispersion impeller 2, and the second pressure-feeding impeller 3 may correspond to the powder area. The powder-liquid mixing pressure-feeding impeller 4 may correspond to the powder-liquid mixing area 143. The first slurry dispersion impeller 5 and the second slurry dispersion impeller 6 may correspond to the slurry area 144.

In some specific embodiments of the present disclosure, the surface roughness of the outer surface of the rotor base 21 is 0.3 μm to 0.4 μm. Specifically, during the machining of the rotor base 21, the outer peripheral surface of each truncated cone 211 of the rotor base 21 and the outer surface of the cone cap 212 can be polished to 300 meshes, so that the surface roughness of the outer surface of the rotor base 21 is controlled to be 0.3 μm to 0.4 μm, so that the slurry is not easy to adhere to the surface of the rotor base 21.

According to one embodiment of the present disclosure, the cross-sectional area of the end of the mixing channel 14 away from the material outlet 13 is larger than the cross-sectional area of the end of the mixing channel 14 close to the material outlet 13 .

Specifically, the cross section of the mixing channel 14 may be a cross section obtained by cutting the mixing channel 14 with a plane perpendicular to the first direction. In the positive direction of the first direction, the area of the cross section of the first end of the mixing channel 14 may be greater than the area of the cross section of the second end of the mixing channel 14. Since the smaller the cross-sectional area of the mixing channel 14, the greater the pressure of the mixing channel 14 at that location. Therefore, the pressure at the first end of the mixing channel 14 is greater than the pressure at the second end of the mixing channel 14. In other words, a pressure difference may be formed between the first end and the second end of the mixing channel 14, which is conducive to pressurizing the mixing channel 14 in the positive direction of the first direction and preventing the material from returning to the feed port.

In addition, by setting the cross-sectional area of the first end of the mixing channel 14 to be larger than the cross-sectional area of the second end of the mixing channel 14, the material can be squeezed during the movement of the material from the feed port to the discharge port 13, thereby reducing the air content inside the material and avoiding noise caused by bubble breakage. At the same time, squeezing is also conducive to the full mixing of the material, so that the blade 22 has a better effect of breaking up the agglomerates during the rotation process.

In some specific embodiments, the portion of the chamber 11 formed by the housing 10 for accommodating the rotor 20 may be substantially cylindrical, and by setting the diameter of the first end of the rotor base 21 to be smaller than the diameter of the second end of the rotor base 21, The cross-section area of the first end of the rotor base 21 is smaller than the cross-section area of the second end of the rotor base 21. The cross-section of the rotor base 21 may be a cross-section obtained by cutting the rotor base 21 with a plane perpendicular to the first direction.

The larger the cross-sectional area of the rotor base 21, the smaller the cross-sectional area of the mixing channel 14. Therefore, by limiting the diameters of the two ends of the rotor base 21, the cross-sectional area of the first end of the mixing channel 14 can be made larger than the cross-sectional area of the second end of the mixing channel 14.

In some optional embodiments, the first direction may be a vertical downward direction, the first feed port 121 and the second feed port 122 are both located on the upper side of the discharge port 13, and the first feed port 121 may be located on the upper side of the second feed port 122. The rotating shaft of the rotor 20 may extend in the vertical direction. The cross section of the mixing channel 14 may be a cross section of the mixing channel 14.

According to one embodiment of the present disclosure, in the direction from the feed port to the discharge port 13 , the cross-sectional area of the mixing channel 14 gradually decreases, so that the pressure in the mixing channel 14 gradually increases from the feed port to the discharge port 13 .

In other words, in the positive direction of the first direction, the cross-sectional area of the mixing channel 14 can gradually decrease, so that the pressure in the mixing channel 14 gradually increases. For example, as shown in FIG8 , the cross-sectional area of the mixing channel 14 gradually decreases from top to bottom.

By setting the cross-sectional area of the mixing channel 14 to gradually decrease in the positive direction of the first direction, the space through which the material flows toward the discharge port 13 can be gradually reduced. By using the structure of the mixing channel 14 to form positive pressure feeding, a significant pressure gradient can be formed in the mixing channel 14, effectively preventing the material from returning to the feed port. In addition, the structure of the gradually decreasing cross-sectional area of the mixing channel 14 is also conducive to more complete mixing of the material in the mixing channel 14, and the blades 22 have a better effect of breaking up the agglomerates.

In some optional embodiments, in the positive direction of the first direction, the inner wall surface of the housing 10 may be inclined inwardly so that the diameter of the mixing channel 14 gradually decreases. For example, the chamber 11 formed by the housing 10 may be roughly in the shape of a trumpet with an opening facing downward to match the shape of the rotor base 21, further reducing the cross-sectional area of the mixing channel 14 in the positive direction of the first direction, and increasing the pressure on the material when it flows toward the discharge port 13.

According to some optional embodiments of the present disclosure, the powder-liquid mixing equipment 100 also includes: a pumping impeller 30, which is accommodated in the chamber 11 and coaxially arranged at one end of the rotor 20 close to the discharge port 13, and the pumping impeller 30 is rotatable around its own axis. The pumping impeller 30 includes a pumping base 31 and a plurality of blades 32, and the outer surface of the pumping base 31 smoothly transitions with the outer surface of the rotor base 21, and the diameter of the pumping base 31 gradually increases in the direction from the feed port toward the discharge port 13.

Specifically, a pumping impeller 30 may be provided at the bottom end of the rotor base 21. The pumping impeller 30 may be coaxially arranged with the rotor 20 and rotate synchronously with the rotor 20. When the pumping impeller 30 rotates, negative pressure may be formed to suck the material. The material is adsorbed toward the direction close to the discharge port 13.

The pumping impeller 30 is mainly composed of a pumping base 31 and blades 32. The pumping base 31 can be coaxially arranged with the rotor base 21 and rotate synchronously with the rotor base 21. The blades 32 can be distributed on the outer peripheral surface of the pumping base 31.

The outer surface of the pumping base 31 and the outer surface of the rotor base 21 can be smoothly transitioned to conform to the flow characteristics of the fluid and improve the smoothness of the material flow.

The outer contour 24 of the pumping base 31 may be streamlined, so that the outer surface of the impeller base fits the flow characteristic curve of the fluid, allowing the slurry to flow more smoothly between the pumping impeller 30 and the inner wall surface of the housing 10 .

In the positive direction of the first direction, the diameter of the pumping base 31 may gradually increase, so that when the material flows from the upper side of the pumping base 31 to the lower side of the pumping base 31, the pressure on the material may gradually increase, which is conducive to the downward flow of the material.

According to some other embodiments of the present disclosure, the outer surface of the pumping base 31 is formed as an inwardly concave arc surface 311 .

The outer surface of the pumping base 31 may be the outer peripheral surface of the pumping base 31. The outer surface of the pumping base 31 may be an arcuate surface 311. As shown in FIG6 , the waistline of the cross section obtained by cutting the pumping base 31 along any plane where the axis 23 of the rotor 20 is located may be composed of a plurality of arcs, the plurality of arcs are tangent to each other in sequence, and the radii of the plurality of arcs may be R1, R2, and R3, respectively. Each arc may be recessed toward the inner side of the pumping base 31. The cross section of the pumping base 31 may be horn-shaped, and the opening of the horn may be toward the lower side of the pumping base 31.

In some other disclosed embodiments, the powder-liquid mixing equipment 100 may further include a driving member 40 and a transmission mechanism 50, wherein the driving member 40 is connected to the transmission mechanism 50, and the transmission mechanism 50 connects the rotor 20 and the pumping impeller 30, and the driving member 40 drives the rotor 20 and the pumping impeller 30 to rotate through the transmission mechanism 50.

According to some specific embodiments of the present disclosure, the powder-liquid mixing device 100 is a slurry mixer. The slurry mixer can mix powdered materials with liquid materials to form slurry. Optionally, the slurry mixer can be used to mix raw materials required for producing power batteries.

The embodiment of the present disclosure also provides a pulping system, which includes a powder-liquid mixing device 100 according to any of the above embodiments. Among them, the pulping system can be used to prepare powder-liquid mixed slurry. Since the powder-liquid mixing device 100 according to the embodiment of the present disclosure has the above technical effects, the pulping system according to the embodiment of the present disclosure also has the corresponding technical effects, that is, it is conducive to guiding the material to flow toward the discharge port 13, and at the same time, it can realize pressurization in the direction from the feed port to the discharge port 13 to prevent the material from returning. In addition, the air content inside the material can be reduced in the process of the material flowing from the feed port to the discharge port 13 to avoid causing noise, and the blades 22 can break up the material during the rotation process. Agglomerates have better effects and are conducive to the full mixing of materials.

Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (16)

A powder-liquid mixing device, characterized in that it comprises: A housing is provided with a chamber therein, the housing has a feed inlet and a discharge outlet, the feed inlet and the discharge outlet are respectively connected to the chamber so that the material flows from the feed inlet to the discharge outlet; and A rotor, the rotor is rotatably disposed in the chamber around its own axis to mix materials, the rotor comprises a rotor base and blades disposed on the outer surface of the rotor base, the outer surface of the rotor base is spaced apart from the inner wall surface of the shell to form a mixing channel; Wherein, the diameter of one end of the rotor base body away from the discharge port is smaller than the diameter of one end of the rotor base body close to the discharge port. The powder-liquid mixing equipment according to claim 1 is characterized in that the axis of the rotor extends from the feed port toward the discharge port, and in the axial direction of the rotor, the diameter of the rotor base gradually increases from the feed port to the discharge port. The powder-liquid mixing equipment according to claim 2 is characterized in that the outer contour of the rotor base is streamlined. The powder-liquid mixing equipment according to claim 2 or 3, characterized in that the rotor base comprises: A plurality of frustums, wherein the plurality of frustums are arranged along the axis direction of the rotor, and the diameter of an end of each frustum away from the discharge port is smaller than the diameter of an end of each frustum close to the discharge port; and A cone cap is arranged at one end of the multiple frustums away from the discharge port, the diameter of the end of the cone cap away from the discharge port is smaller than the diameter of the end of the cone cap close to the discharge port, and the multiple frustums and the cone cap rotate synchronously around the axis of the rotor. The powder-liquid mixing equipment according to claim 4 is characterized in that the generatrix of at least one of the truncated cones is an arc line, and the arc line protrudes outward from the truncated cone. The powder-liquid mixing equipment according to claim 4 or 5 is characterized in that there is a smooth transition between the outer surfaces of adjacent frustums, and there is a smooth transition between the outer surface of the cone cap and the outer surface of the adjacent frustum. The powder-liquid mixing equipment according to any one of claims 4 to 6 is characterized in that the angle between the generatrix of the frustum closest to the discharge port among the multiple frustums and its own axis is 1.5° to 15°. The powder-liquid mixing equipment according to any one of claims 4 to 7 is characterized in that the angle between the generatrix of the frustum closest to the discharge port among the multiple frustums and its bottom surface is 75° to 88°. The powder-liquid mixing equipment according to any one of claims 4 to 8 is characterized in that the taper of the frustum closest to the discharge port among the multiple frustums is smaller than the taper of the frustum farthest from the discharge port among the multiple frustums. The powder-liquid mixing equipment according to any one of claims 4 to 9 is characterized in that the end of the cone cap away from the discharge port is formed as a rounded structure, the end of the cone cap close to the discharge port is formed as a cylindrical end, and the cone adjacent to the cone cap among the multiple cones is provided with a mounting groove toward a side of the cone cap, and the cylindrical end extends into the mounting groove. The powder-liquid mixing equipment according to any one of claims 4 to 10 is characterized in that a plurality of blades are provided on the outer circumferential surface of each of the frustums, and each of the frustums and the corresponding plurality of blades cooperate to form a frustum impeller, and the number of the frustum impellers is 4 to 12. The powder-liquid mixing equipment according to any one of claims 1 to 11 is characterized in that the cross-sectional area of the end of the mixing channel away from the discharge port is larger than the cross-sectional area of the end of the mixing channel close to the discharge port. The powder-liquid mixing equipment according to claim 12 is characterized in that, in the direction from the feed port to the discharge port, the cross-sectional area of the mixing channel gradually decreases, so that the pressure in the mixing channel gradually increases from the feed port to the discharge port. The powder-liquid mixing device according to any one of claims 1 to 13, characterized in that it also includes: A pumping impeller is contained in the chamber and is coaxially arranged at one end of the rotor close to the discharge port. The pumping impeller is rotatable around its own axis. The pumping impeller comprises a pumping base and a plurality of blades. The outer surface of the pumping base smoothly transitions with the outer surface of the rotor base. In the direction from the feed port to the discharge port, the diameter of the pumping base gradually increases. The powder-liquid mixing equipment according to any one of claims 1 to 14 is characterized in that the powder-liquid mixing equipment is a slurry mixer. A pulping system, characterized by comprising: the powder-liquid mixing equipment described in any one of claims 1-15.