Powder-liquid mixing equipment

Abstract

The utility model discloses powder-liquid mixing equipment which comprises a shell, an air supply paddle, a scattering mechanism, a mixing impeller, a pumping impeller, a dispersing mechanism and a motor, the motor is connected with the shell, and the air supply paddle, the scattering mechanism, the mixing impeller and the pumping impeller are all connected with an output shaft of the motor; an air inlet channel, a scattering area, an infiltration area and a dispersing area which are sequentially communicated from top to bottom are arranged in the shell, the scattering mechanism is located in the scattering area and used for scattering powder, and the air supply paddle is located above the scattering mechanism, arranged at the air inlet channel and used for supplying air downwards. The infiltration area is used for infiltrating powder and liquid into slurry, the mixing impeller is located in the infiltration area, a plurality of through holes are formed in blades of the mixing impeller, the slurry penetrates through the through holes so as to shear and disperse the slurry, and the pumping impeller is used for driving the slurry to be discharged to the outside after being dispersed by the dispersing mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of powder-liquid mixing, in particular to a powder-liquid mixing device. Background Art

[0002] In the preparation of lithium-ion battery slurry, slurry is a high-viscosity and high-solid content mixture made by mixing powder and liquid. Generally speaking, the whole mixing process can be divided into three stages: breaking up, infiltration and dispersion. In the breaking up stage, the powder changes from a large mass to a dispersed state dispersed in the air or other gases after being stirred by the breaking mechanism; in the infiltration stage, the dispersed powder contacts the liquid and is initially mixed into slurry; in the dispersion stage, the slurry is sheared and dispersed by the dispersion mechanism to make the slurry more evenly dispersed.

[0003] The powder-liquid mixing equipment of the prior art has the following serious problems:

[0004] 1. The equipment is prone to shaking, making loud noises and consuming high energy;

[0005] 2. After the powder is broken up, there will be a phenomenon of powder accumulation on the top of the powder to form a hard lump;

[0006] 3. There is splashing of liquid;

[0007] 4. When making high-solid slurry, the high-efficiency pulping machine is very easy to get blocked;

[0008] Fifth, there is a lot of pulp remaining at the bottom of the pulping machine, which cannot be completely discharged and there is a phenomenon of agglomeration.

[0009] Under the condition of the same solid content, how to achieve more energy saving, reduce vibration and noise during equipment operation, increase stability, reduce clogging and improve dispersion effect is a technical challenge for powder-liquid mixing equipment. Utility Model Content

[0010] The purpose of the utility model is to provide a powder-liquid mixing device, which mainly solves the technical problems of how to achieve more energy saving when processing the same solid content, and how to make the equipment have lower vibration and noise, higher stability, less prone to material blockage and improved dispersion effect during operation.

[0011] To achieve this purpose, the utility model adopts the following technical solutions:

[0012] A powder-liquid mixing device comprises a housing, an air supply paddle, a dispersing mechanism, a mixing impeller, a pumping impeller, a dispersing mechanism and a motor, wherein the motor is connected to the housing, and the air supply paddle, the dispersing mechanism, the mixing impeller and the pumping impeller are all connected to the output shaft of the motor;

[0013] The shell is provided with an air inlet passage, a breaking up area, an infiltration area and a dispersion area which are connected in sequence from top to bottom. The breaking up mechanism is located in the breaking up area and is used to break up the powder. The air supply paddle is located above the breaking up mechanism and is provided at the air inlet passage. When the air supply paddle rotates with the breaking up mechanism, it is used to supply air downward. The infiltration area is used for powder and liquid to infiltrate each other into slurry. The mixing impeller is located in the infiltration area. A plurality of through holes are provided on the blades of the mixing impeller. The through holes are used for the slurry to pass through so as to shear and disperse the slurry. The pumping impeller and the dispersion mechanism are both located in the dispersion area. The pumping impeller is used to drive the slurry to be dispersed by the dispersion mechanism and then discharged to the outside.

[0014] In one of the technical solutions, the powder-liquid mixing equipment also includes a rotating shaft, the air supply paddle, the breaking up mechanism, the mixing impeller, the pumping impeller and part of the dispersion mechanism are all connected to the rotating shaft, the rotating shaft is connected to the output shaft of the motor, a first bearing is installed between the bottom end of the rotating shaft and the shell, a second bearing is installed between the top end of the rotating shaft and the shell, a seal is provided at an adjacent position below the second bearing of the shell, the seal is used to separate the second bearing and the breaking up area, an isolation channel is provided between the seal and the air inlet channel, and the top end of the isolation channel is higher than the seal.

[0015] In one of the technical solutions, a labyrinth sealing structure is provided on the path of the air inlet channel.

[0016] In one of the technical solutions, the scattering mechanism includes a plurality of scattering blades arranged in sequence, and the scattering blades are provided with a plurality of inclined scattering plates on the circumferential outer wall, and the inclination angle of the scattering plates is between 40° and 70°.

[0017] In one of the technical solutions, the powder-liquid mixing device further comprises a feeding screw, which is arranged between the breaking mechanism and the mixing impeller and rotates synchronously with the mixing impeller, and the feeding screw is provided with a plurality of inclined feeding pieces on the circumferential outer wall, and when the feeding screw rotates, the feeding pieces are used to push the upper powder downward, and the bottom surface of the feeding piece serves as a blocking surface for blocking the slurry below from splashing upward;

[0018] The number of the feeding sheets is greater than or equal to the number of the blades on the mixing impeller, and the top end of each blade on the mixing impeller is connected to the bottom end of a corresponding feeding sheet.

[0019] In one of the technical solutions, the powder-liquid mixing equipment further includes a speed-adjustable screw-type powder feeding mechanism, which is connected to the shell and is used to drive the powder into the dispersing area.

[0020] In one of the technical solutions, a liquid inlet cavity is further provided inside the shell, and a plurality of guide blocks arranged circumferentially at intervals are convexly provided in the liquid inlet cavity, and an inclined guide surface is provided on the guide block, and the guide surface is used to guide the liquid to gradually enter the wetting area. An arc-shaped liquid guide surface is provided on the inner wall of the shell at the wetting area, and the liquid guide surface extends downward toward the dispersion area.

[0021] In one of the technical solutions, the dispersion mechanism includes a rotating cutter disc and a baffle, the baffle is fixedly connected to the housing, and the rotating cutter disc is connected to the output shaft of the motor;

[0022] The baffle includes a main body and two circles of ribs protruding from the main body, an annular flow channel groove is arranged between the two circles of ribs, the rotating cutter disc includes a connected base and an annular boss, the boss is embedded in the flow channel groove, a plurality of penetrating notches are arranged on the two circles of ribs, a plurality of penetrating shear holes are arranged on the boss, and a circle of labyrinth sealing structure is arranged on the bottom of the base.

[0023] In one of the technical solutions, when the rotating cutter disc rotates to any position relative to the baffle, the penetration direction of any of the notches and the penetration direction of any of the shear holes are not on the same straight line.

[0024] In one of the technical solutions, the number of blades on the pumping impeller is greater than or equal to the number of blades on the mixing impeller, and the bottom end of each blade on the mixing impeller is connected to the top end of the blade on the corresponding pumping impeller.

[0025] Compared with the prior art, the powder-liquid mixing device provided by the utility model has at least the following beneficial effects:

[0026] During operation, the powder enters the dispersing area, and the liquid enters the wetting area. The dispersing mechanism rotates under the drive of the motor and disperses the powder. The powder changes from a large mass to a dispersed state through the stirring of the dispersing mechanism. Then the dispersed powder and the liquid are infiltrated and contacted with each other, thereby initially mixing into a slurry. During the mutual infiltration of the powder and the liquid, the mixing impeller is also driven by the motor to rotate. After passing through multiple through holes on the mixing impeller, the slurry is sheared and dispersed to a certain extent. Finally, the pumping impeller drives the slurry into the dispersing mechanism, and the dispersing mechanism also shears and disperses the slurry. The slurry is discharged outward by the thrust of the pumping impeller. This solution adopts a top-in and bottom-out method, so that the slurry at the bottom is easier to discharge outward instead of remaining at the bottom.

[0027] Specifically, this solution focuses on optimizing the infiltration process in the three stages of the mixing process. During the mixing process, the through holes on the mixing impeller blades are used to shear the slurry, so that the powder is evenly infiltrated and dispersed, the appearance of powder clumps is reduced, and the mixing efficiency of the powder and liquid is accelerated. Moreover, the slurry will pass through the through holes for many times, which greatly extends the mixing path of the powder and liquid, making the slurry mixing more uniform. In addition, using the mixing impeller to disperse in advance is equivalent to sharing the pressure of the subsequent dispersing mechanism and the pumping impeller. The dispersion of the previous mixing impeller belongs to the shearing in the rotation direction, so it requires low energy consumption. In other words, by setting the mixing impeller, the energy consumption of the subsequent dispersing mechanism and the energy consumption of the pumping impeller can be reduced. Therefore, while improving the dispersion effect of the high-solid content slurry, the power of the powder-liquid mixing equipment also becomes lower.

[0028] In addition, the present solution also arranges an air supply paddle above the dispersing mechanism and an air inlet channel at the top of the shell, so that outside air can enter the shell from the air inlet channel. When the air supply paddle rotates with the dispersing mechanism, the air supply paddle will force outside air to enter the shell and supply air to the dispersing area below, so that the dispersed powder in the dispersing area will not accumulate and agglomerate upward in large quantities. At the same time, it also accelerates the speed of powder infiltration and further improves the dispersion effect of the slurry. Moreover, the wind entering the shell from the air inlet channel can also weaken the cavity cavitation phenomenon that occurs when each impeller is running, reducing the vibration problem of the equipment caused by cavity cavitation, and making the equipment vibrate and make less noise when working. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 A schematic plan view of a powder-liquid mixing device provided in an embodiment of the present application;

[0031] Figure 2 An internal structure diagram of a powder-liquid mixing device provided in an embodiment of the present application;

[0032] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0033] Figure 4 for Figure 2 A partial enlarged view of point B in the middle;

[0034] Figure 5A schematic diagram of the structure of the dispersing mechanism, the air supply paddle and the feeding screw provided in the embodiment of the present application when they cooperate;

[0035] Figure 6 A schematic diagram of the structure of a mixing impeller provided in an embodiment of the present application;

[0036] Figure 7 A top view of the liquid inlet cavity inside the housing provided in an embodiment of the present application;

[0037] Figure 8 A front view schematic diagram of the liquid inlet cavity and the wetting area inside the shell provided in an embodiment of the present application;

[0038] Fig. 9 A schematic diagram of the structure of a rotating cutter disc and a pumping impeller provided in an embodiment of the present application;

[0039] Fig.10 A schematic diagram of the structure of the baffle provided in the embodiment of the present application;

[0040] Fig.11 A schematic diagram of the structure of the rotating cutter disc and the baffle plate provided in an embodiment of the present application when they cooperate with each other.

[0041] Among them, the reference numerals in the figure are:

[0042] 1. Shell; 11. Air inlet channel; 111. First labyrinth seal structure; 12. Scattering area; 13. Wetting area; 14. Dispersing area; 15. Liquid inlet; 16. Liquid outlet; 17. Seal; 18. Isolation channel; 19. Liquid inlet chamber; 2. Screw powder supply mechanism; 3. Air supply paddle; 4. Scattering mechanism; 41. Scattering blade; 411. Scattering sheet; 5. Mixing impeller; 51. Through hole; 6. Pumping impeller; 7. Dispersing mechanism; 7 1. Rotating cutter disc; 711. Base; 712. Boss; 7121. Shear hole; 713. Radial protrusion; 72. Baffle; 721. Main body; 722. Sidewall; 7221. Notch; 723. Flow channel; 8. Motor; 9. Rotating shaft; 10. First bearing; 20. Second bearing; 30. Feeding screw; 301. Feeding sheet; 40. Guide block; 401. Guide surface; 100. Liquid guide surface; 200. Second labyrinth seal structure. DETAILED DESCRIPTION

[0043] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0045] It should be understood that the orientations or positional relationships indicated by terms such as "upper", "lower", "top", "bottom", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience 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, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0048] Please also read Figures 1 to 6 The present embodiment provides a powder-liquid mixing device, which includes a shell 1, a screw powder feeding mechanism 2, an air supply paddle 3, a breaking mechanism 4, a mixing impeller 5, a pumping impeller 6, a dispersing mechanism 7, a motor 8 and a rotating shaft 9.

[0049] Among them, the shell 1 is provided with an air inlet channel 11, a breaking up area 12, an infiltration area 13 and a dispersion area 14 which are connected in sequence from top to bottom. The above-mentioned screw powder feeding mechanism 2 is connected to the outside of the shell 1 and is used to automatically drive the powder into the breaking up area 12. The screw powder feeding mechanism 2 is a prior art, which has a speed regulation function. The powder feeding speed can be adjusted according to the actual solid content of production and the melting speed of different liquids. The motor 8 is connected to the outside of the shell 1, and the rotating shaft 9 is connected to the output shaft of the motor 8. The rotating shaft 9 extends into the interior of the shell 1. The above-mentioned air supply paddle 3, breaking up mechanism 4, mixing impeller 5, pumping impeller 6 and dispersion mechanism 7 are all connected to the rotating shaft 9 to rotate synchronously with the rotating shaft 9. In addition, the breaking up mechanism 4 is arranged in the breaking up area 12. The breaking up mechanism 4 is used to break up the incoming powder so that the powder is broken up into a dispersed state. The air supply paddle 3 is located above the breaking up mechanism 4 and is arranged at the air inlet channel 11. The air inlet channel 11 is connected to the outside air. When the air supply paddle 3 is in a rotating state, the air supply paddle 3 drives the outside air to enter and blow downward, so that the dispersed powder located in the breaking up area 12 will not accumulate and agglomerate upward in large quantities. A liquid inlet 15 and a liquid outlet 16 are provided on the outer wall of the shell 1, wherein the liquid inlet 15 is connected to the infiltration area 13, and the liquid inlet 15 is used to allow external liquid to enter the infiltration area 13, and the powder and the liquid are initially infiltrated into slurry in the infiltration area 13, and the mixing impeller 5 is located in the infiltration area 13, and a plurality of through holes 51 are provided on the blades of the mixing impeller 5. When the mixing impeller 5 rotates, the slurry will pass through the plurality of through holes 51 on the mixing impeller 5, and the hole walls of the through holes 51 shear the slurry to improve the efficiency of the powder and the liquid in the infiltration area 13. The liquid outlet 16 is connected to the dispersion area 14, and the pumping impeller 6 and the dispersion mechanism 7 are both located in the dispersion area 14. The pumping impeller 6 is used to drive the slurry to be sheared and dispersed by the dispersion mechanism 7 and then discharged to the outside along the liquid outlet 16.

[0050] The complete working process can be summarized as follows: the screw powder feeding mechanism 2 drives the powder to enter the dispersing area 12 according to the preset speed, and the dispersing mechanism 4 rotates and disperses the powder under the drive of the motor 8. The powder changes from a large agglomerate to a dispersed state through the stirring of the dispersing mechanism 4. At the same time, the liquid also enters the wetting area 13 from the liquid inlet 15. The dispersed powder and the liquid are infiltrated and contacted with each other in the wetting area 13, and are initially mixed into a slurry. During the mutual infiltration of the powder and the liquid, the mixing impeller 5 rotates under the drive of the motor, and the slurry is sheared and dispersed to a certain extent after passing through the multiple through holes 51 on the mixing impeller 5. Finally, the pumping impeller 6 drives the slurry into the dispersing mechanism 7, and the dispersing mechanism 7 also shears and disperses the slurry. The slurry is thrust by the pumping impeller 6 and is discharged outward along the liquid outlet 16.

[0051] Specifically, this solution adopts a top-in-bottom-out method, so that the slurry at the bottom is easier to discharge outward instead of remaining at the bottom; secondly, this solution focuses on optimizing the infiltration process in the three stages of the mixing process. During the mixing process, the through holes 51 on the blades of the mixing impeller 5 are used to shear the slurry, so that the powder is evenly infiltrated and dispersed, the appearance of powder clumps is reduced, and the mixing efficiency of the powder and liquid is accelerated. Moreover, the slurry will pass through the through holes 51 many times, which greatly extends the mixing path of the powder and liquid, making the slurry mixing more uniform; in addition, using the mixing impeller 5 to disperse in advance is equivalent to sharing the pressure of the subsequent dispersing mechanism 7 and the pumping impeller 6. The dispersion of the previous mixing impeller 5 belongs to shearing in the rotation direction, so it does not require high energy consumption. In other words, by setting the mixing impeller 5, the energy consumption of the subsequent dispersing mechanism 7 and the pumping impeller 6 can be reduced. Therefore, while improving the dispersion effect of high-solid content slurry, the power of the powder-liquid mixing equipment also becomes lower. In addition, the present solution also arranges an air supply slurry 3 above the dispersing mechanism 4. The air supply slurry 3 not only prevents the dispersed powder in the dispersing area 12 from accumulating and agglomerating upward in large quantities, but also accelerates the infiltration speed of the powder in the infiltration area 13 and further improves the dispersion effect of the slurry. Moreover, the wind entering the shell 1 from the air inlet channel 11 can also weaken the cavity cavitation phenomenon that occurs when each impeller is running, thereby reducing the vibration problem of the equipment caused by cavity cavitation, and making the equipment vibrate and make less noise when working.

[0052] In this embodiment, a first bearing 10 is installed between the bottom end of the rotating shaft 9 and the shell 1, and a second bearing 20 is installed between the top end of the rotating shaft 9 and the shell 1. By arranging bearings at both ends of the rotating shaft 9, the rotating shaft 9 can still have high rotation stability when simultaneously loading multiple components such as the air supply paddle 3, the breaking mechanism 4, the mixing impeller 5, the pumping impeller 6 and the dispersion mechanism 7, thereby solving the problem of the rotating shaft 9 consuming some useless work due to unstable shaking and reducing the actual power required by the motor 8.

[0053] In this embodiment, a seal 17 is provided at an adjacent position below the second bearing 20 of the shell 1. The seal 17 is used to separate the second bearing 20 and the scattering area 12 to prevent the powder in the scattering area 12 from entering the second bearing 20 and affecting the rotation of the rotating shaft 9. At the same time, it also prevents the dust dropped by the second bearing 20 due to rotation from entering the scattering area 12, that is, prevents wear foreign matter from entering the scattering area 12, so that wear foreign matter will not be introduced in the process of mixing liquid and powder. In addition, an isolation channel 18 is provided between the seal 17 and the air inlet channel 11, and the top of the isolation channel 18 is higher than the seal 17, so that the wear foreign matter generated by the rotation of the top will not enter the dispersion area 12 along the air inlet channel 11, thereby ensuring that the liquid and powder will not introduce wear foreign matter in the process of mixing into a slurry. Moreover, by providing the isolation channel 18, it can also be difficult for the powder in a dispersed state to enter the second bearing 20 upward, thereby further ensuring the reliability that the top of the rotating shaft 9 can rotate relative to the shell 1 for a long time and the reliability that wear foreign matter will not be introduced into the dispersion area 12.

[0054] See also Figure 3 A first labyrinth sealing structure 111 is provided on the path of the air inlet channel 11. The first labyrinth sealing structure 111 is used to block liquid and powder, so as to further ensure that the powder in the dispersed state located in the scattering area 12 is difficult to enter upward into the sealing member 17, thereby further ensuring that the top end of the rotating shaft 9 can rotate relative to the housing 1 for a long time, and further ensuring the reliability that no wear foreign matter will be introduced into the scattering area 12.

[0055] See also Figure 5 The scattering mechanism 4 specifically includes a plurality of scattering blade discs 41 arranged in sequence, each scattering blade disc 41 is fixed on the rotating shaft 9, and each scattering blade disc 41 is convexly provided with a plurality of inclined scattering pieces 411 on the circumferential outer wall, and the inclination angle of each scattering piece 411 is between 40° and 70°. When the rotating shaft 9 rotates, the plurality of scattering blade discs 41 will rotate along with the rotating shaft 9, and the rotating scattering pieces 411 will scatter the powder, so that the powder changes from large clumps to a dispersed state.

[0056] Please also read Figure 4 and Figure 5In this embodiment, a feeding screw 30 is arranged between the dispersing mechanism 4 and the mixing impeller 5. The feeding screw 30 is also fixed on the rotating shaft 9, so that the feeding screw 30 also rotates synchronously with each dispersing blade disc 41 and the mixing impeller 5. Specifically, a plurality of inclined feeding pieces 301 are convexly provided on the circumferential outer wall of the feeding screw 30. When the feeding screw 30 rotates, the feeding pieces 301 push the upper powder downward for transportation. The bottom surface of the feeding piece 301 can also be used as a blocking surface for blocking the slurry below from splashing upward. The multiple feeding pieces 301 on the feeding screw 30 cover the complete circular area together (that is, in each of the two adjacent feeding pieces 301, the top end of one feeding piece 301 falls on the bottom end position of the other feeding piece 301 when projected in the vertical direction), thereby further ensuring that the slurry below will not splash upward to the dispersing area 12. More specifically, the number of the feed sheets 301 is greater than or equal to the number of blades on the mixing impeller 5, and the top of each blade on the mixing impeller 5 is connected to the bottom of a corresponding feed sheet 301, so that most of the powder can continue to be transported downward along the blades on the mixing impeller 5 after leaving the feed sheet 301, thereby avoiding the phenomenon that the powder directly falls into the infiltration area 13 and causes a large amount of slurry to splash upward. Similarly, the number of blades on the pumping impeller 6 is greater than or equal to the number of blades on the mixing impeller 5, and the bottom of each blade on the mixing impeller 5 is connected to the top of the blade on the corresponding pumping impeller 6, so that most of the slurry can continue to be transported to the dispersion area 14 along the blades on the pumping impeller 6 after leaving the blades on the mixing impeller 5, thereby reducing the liquid splashing phenomenon generated by the slurry located in the infiltration area 13 during the transportation process to the dispersion area 14, thereby ensuring the stability of the powder and liquid from the infiltration stage to the dispersion stage.

[0057] Please also read Figure 1 , Figure 7 and Figure 8A liquid inlet cavity 19 is also provided in the shell 1, and the liquid inlet cavity 19 is provided between the liquid inlet port 15 and the infiltration area 13, so that the liquid enters the liquid inlet cavity 19 after entering the liquid inlet port 15 and then enters the infiltration area 13. Specifically, a plurality of guide blocks 40 arranged at intervals along the circumferential direction are convexly provided in the liquid inlet chamber 19. The plurality of guide blocks 40 arranged at intervals along the circumferential direction can make the liquid flow in a ring after entering the liquid inlet 15, so as to provide a certain buffer for the liquid, and prevent the liquid from directly rushing into the wetting area 13 and causing a large amount of liquid splashing. An inclined guide surface 401 is provided on the guide block 40, and the guide surface 401 is used to guide the liquid to gradually enter the wetting area 13, so as to reduce the phenomenon of liquid splashing in the wetting area 13. In other words, the plurality of guide blocks 40 arranged at intervals along the circumferential direction together constitute a structure similar to the shape of a volute. The kinetic energy of the liquid gradually decreases after entering from the liquid inlet 15, which conforms to the law that the kinetic energy of the liquid flow gradually decreases, and plays a role in keeping the flow rate of the liquid from the outlets of each guide block 40 consistent. In addition, the shell 1 is also provided with an arc-shaped liquid guiding surface 100 on the inner wall at the infiltration area 13, and the liquid guiding surface 100 extends downward to the dispersion area 14. By providing the arc-shaped liquid guiding surface 100, the liquid splashing phenomenon when the slurry flows from the infiltration area 13 to the dispersion area 14 can be reduced, thereby further ensuring the stability of the powder and liquid from the infiltration stage to the dispersion stage.

[0058] Please also read Figure 4 and Figures 9 to 11 The dispersion mechanism 7 specifically includes a rotating blade disc 71 and a baffle 72. The baffle 72 is fixedly connected to the housing 1. The rotating blade disc 71 is fixedly connected to the rotating shaft 9. The baffle 72 includes a main body 721 and two ribs 722 protruding from the main body 721. The two ribs 722 are both annular, and the two ribs 722 are arranged at intervals so that an annular flow channel groove 723 is formed between the two ribs 722. A plurality of transversely penetrating notches 7221 are provided on the two ribs 722. The rotating blade disc 71 includes a main body 721 and two ribs 722 protruding from the main body 721. The base 711 and the annular boss 712 are connected, and the boss 712 is embedded in the flow channel groove 723 and is arranged around the outer periphery of the above-mentioned pumping impeller 6. During installation, the pumping impeller 6 can be fixed on the base 711 in advance, and then the rotating blade 71 with the pumping impeller 6 is installed on the rotating shaft 9. The boss 712 is provided with a plurality of transversely penetrating shearing holes 7121. When the rotating blade 71 rotates relative to the baffle 72, the rotating blade 71 and the baffle 72 can shear the slurry together. In addition, when the rotating blade 71 rotates to any position relative to the baffle 72, the penetration direction of any notch 7221 and the penetration direction of any shearing hole 7121 are not in the same straight line, thereby preventing the slurry from being discharged outward without being sheared together by the rotating blade 71 and the baffle 72, ensuring that the slurry can be discharged outward only after being sheared together by the rotating blade 71 and the baffle 72, so as to further improve the dispersion effect of the slurry.

[0059] Please refer again Figure 4 A circle of second labyrinth sealing structure 200 is arranged at the bottom of the base 711, and the outer diameter of the second labyrinth sealing structure 200 is approximately equal to two-thirds of the outer diameter of the base 711. The layout of the second labyrinth sealing structure 200 is low on both sides and high in the middle, which plays a role in blocking the slurry from approaching the center at the bottom of the base 711. In addition, a plurality of circumferentially arranged radial protrusions 713 are also arranged at the bottom of the rotating cutter disc 71. The radial protrusions 713 are located on the outside of the second labyrinth sealing structure 200. When running, the radial protrusions 713 can be offset by the immersion of the slurry to discharge the slurry deposited at the bottom outward, thereby avoiding the problem of excessive deposition of slurry at the bottom causing the rotation of the shaft 9 to be stuck, ensuring that the equipment can operate stably for a long time and extending the equipment maintenance cycle.

[0060] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for the purpose of explaining the principles of the present invention, and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementation methods of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A powder-liquid mixing device, It is characterized in that It includes a housing, an air supply paddle, a scattering mechanism, a mixing impeller, a pumping impeller, a dispersing mechanism and a motor, wherein the motor is connected to the housing, and the air supply paddle, the scattering mechanism, the mixing impeller and the pumping impeller are all connected to the output shaft of the motor; The shell is provided with an air inlet passage, a breaking up area, an infiltration area and a dispersion area which are connected in sequence from top to bottom. The breaking up mechanism is located in the breaking up area and is used to break up the powder. The air supply paddle is located above the breaking up mechanism and is provided at the air inlet passage. When the air supply paddle rotates with the breaking up mechanism, it is used to supply air downward. The infiltration area is used for powder and liquid to infiltrate each other into slurry. The mixing impeller is located in the infiltration area. A plurality of through holes are provided on the blades of the mixing impeller. The through holes are used for the slurry to pass through so as to shear and disperse the slurry. The pumping impeller and the dispersion mechanism are both located in the dispersion area. The pumping impeller is used to drive the slurry to be dispersed by the dispersion mechanism and then discharged to the outside.

2. The powder-liquid mixing device according to claim 1, It is characterized in that The powder-liquid mixing equipment also includes a rotating shaft, and the air supply paddle, the breaking up mechanism, the mixing impeller, the pumping impeller and part of the dispersion mechanism are all connected to the rotating shaft, and the rotating shaft is connected to the output shaft of the motor. A first bearing is installed between the bottom end of the rotating shaft and the shell, and a second bearing is installed between the top end of the rotating shaft and the shell. The shell is provided with a seal at an adjacent position below the second bearing, and the seal is used to separate the second bearing and the breaking up area. An isolation channel is provided between the seal and the air inlet channel, and the top end of the isolation channel is higher than the seal.

3. The powder-liquid mixing device according to claim 2, It is characterized in that A labyrinth sealing structure is arranged on the path of the air inlet channel.

4. The powder-liquid mixing device according to claim 1, It is characterized in that The scattering mechanism comprises a plurality of scattering blades arranged in sequence, and the scattering blades are provided with a plurality of inclined scattering plates on the circumferential outer wall, and the inclination angle of the scattering plates is between 40° and 70°.

5. The powder-liquid mixing device according to claim 1, It is characterized in that The powder-liquid mixing device further comprises a feeding screw, which is arranged between the dispersing mechanism and the mixing impeller and rotates synchronously with the mixing impeller. The feeding screw is provided with a plurality of inclined feeding pieces on the circumferential outer wall. When the feeding screw rotates, the feeding pieces are used to push the upper powder to be transported downward, and the bottom surface of the feeding piece serves as a blocking surface for blocking the slurry below from splashing upward. The number of the feeding sheets is greater than or equal to the number of the blades on the mixing impeller, and the top end of each blade on the mixing impeller is connected to the bottom end of a corresponding feeding sheet.

6. The powder-liquid mixing device according to claim 1, It is characterized in that The powder-liquid mixing device further comprises a speed-adjustable screw-type powder feeding mechanism, which is connected to the housing and is used to drive the powder into the dispersing area.

7. The powder-liquid mixing device according to claim 1, It is characterized in that A liquid inlet cavity is also provided inside the shell, and a plurality of guide blocks arranged at intervals along the circumferential direction are convexly provided in the liquid inlet cavity. An inclined guide surface is provided on the guide block, and the guide surface is used to guide the liquid to gradually enter the wetting area. An arc-shaped liquid guide surface is provided on the inner wall of the shell at the wetting area, and the liquid guide surface extends downward toward the dispersion area.

8. The powder-liquid mixing device according to claim 1, It is characterized in that The dispersion mechanism includes a rotating cutter disc and a baffle, wherein the baffle is fixedly connected to the housing, and the rotating cutter disc is connected to the output shaft of the motor; The baffle includes a main body and two circles of ribs protruding from the main body, an annular flow channel groove is arranged between the two circles of ribs, the rotating cutter disc includes a connected base and an annular boss, the boss is embedded in the flow channel groove, a plurality of penetrating notches are arranged on the two circles of ribs, a plurality of penetrating shear holes are arranged on the boss, and a circle of labyrinth sealing structure is arranged on the bottom of the base.

9. The powder-liquid mixing device according to claim 8, It is characterized in that When the rotating cutter disc rotates to any position relative to the baffle, the penetration direction of any of the notches and the penetration direction of any of the shear holes are not on the same straight line.

10. The powder-liquid mixing device according to claim 1, It is characterized in that The number of blades on the pumping impeller is greater than or equal to the number of blades on the mixing impeller, and the bottom end of each blade on the mixing impeller is connected to the top end of a corresponding blade on the pumping impeller.

Images