Stirring machine upper cover assembly and stirring machine

Abstract

The invention provides a stirrer upper cover assembly and a stirrer, and relates to the technical field of stirring devices. The stirrer upper cover assembly provided by the embodiment of the invention comprises an upper cover and a base plate, the friction coefficient of the material of the base plate is lower than that of the material of the upper cover, and the base plate is detachably installed on one side of the inner wall of the upper cover so as to shield cleaning dead corners in the upper cover. According to the stirrer upper cover assembly provided by the embodiment of the invention, the base plate is mounted on one side of the inner wall of the upper cover, and cleaning dead corners in the upper cover can be shielded by the base plate, so that slurry is prevented from splashing and adhering to the cleaning dead corners of the upper cover, and the cleaning dead corners of the upper cover do not need to be cleaned; the inner wall of the cleaning dead angle of the upper cover cannot be scratched, so that metal filings fall off, the friction coefficient of the material of the base plate is lower than that of the material of the upper cover, slurry splashed to the base plate is easy to clean, and dry material impurities cannot be generated to pollute the slurry.

Description

Technical Field

[0001] This invention relates to the field of mixing device technology, and in particular to a mixer cover assembly and a mixer. Background Technology

[0002] In the lithium battery production process, a mixer is needed to stir the cell slurry. Existing mixers include a mixing tank and a stirring blade installed inside the mixing tank. To prevent the slurry from contacting the inner wall of the mixing tank and the stirring blade, thereby reducing the iron content in the slurry, the inner wall of the existing mixing tank and the stirring blade are coated with a Teflon layer.

[0003] The top of the mixing tank is covered with a lid, but the inner wall of the lid is usually not coated with Teflon. This makes it difficult to clean the slurry after it splashes into the dead corners of the lid. This not only produces dry material impurities, but also easily scratches the inner wall of the dead corners of the lid when cleaning it, resulting in metal shavings falling from the dead corners of the lid and contaminating the slurry. Summary of the Invention

[0004] The purpose of this invention is to provide a mixer cover assembly and a mixer to alleviate the technical problem in the prior art where, during the lithium battery production process, the cell slurry inside the mixer splashes into the cleaning dead corners of the mixing tank cover and is difficult to clean. This not only produces dry material impurities but also easily scratches the inner wall of the cleaning dead corners of the cover during cleaning, resulting in metal shavings falling from the cleaning dead corners of the cover and contaminating the slurry.

[0005] In a first aspect, the present invention provides a mixer cover assembly, the mixer cover assembly comprising a cover and a pad; The friction coefficient of the pad material is lower than that of the top cover material. The pad is detachably installed on one side of the inner wall of the top cover to cover the cleaning dead corners inside the top cover.

[0006] In an optional embodiment, the pad is snapped into the top cover.

[0007] In an optional embodiment, the top cover is groove-shaped, and the inner peripheral wall of the top cover is provided with an annular groove extending circumferentially thereon. The outer edge of the pad is engaged in the groove to cover the cleaning dead corner between the inner peripheral wall of the top cover and the bottom of the groove.

[0008] In an optional embodiment, the pad is provided with a through hole for the mixing shaft of the mixer to pass through.

[0009] In an optional embodiment, a gap is provided between the inner wall of the through hole and the outer wall of the stirring shaft.

[0010] In an optional embodiment, the gap between the through hole and the stirring shaft is 1-2 mm.

[0011] In an optional embodiment, the pad is made of perfluoroether.

[0012] In an optional embodiment, the pad includes multiple plates, which are spliced ​​together to form the pad, and any two adjacent plates in a set are detachably connected.

[0013] In an optional embodiment, two adjacent plates are detachably connected by a plug-in structure, the plug-in structure including a plug-in protrusion and a plug-in groove; In two adjacent plates, one plate has the insertion protrusion on its side and the other plate has the insertion groove on its side. The insertion protrusion is inserted into the insertion groove in a direction parallel to the pad.

[0014] In a second aspect, the present invention provides a mixer, the mixer including the mixer cover assembly described in any of the foregoing embodiments.

[0015] The mixer cover assembly provided by this invention includes a cover and a pad. The friction coefficient of the pad material is lower than that of the cover material. The pad is detachably installed on one side of the inner wall of the cover to cover the cleaning dead corners inside the cover. The mixer cover assembly provided by this invention is applied to a mixer, specifically, the mixer is used to stir the cell slurry during lithium battery production. The mixer typically includes a tank with an opening at the top. The mixer cover assembly provided in this embodiment is installed on the opening at the top of the tank to seal the tank. During the stirring of the cell slurry inside the tank using the mixer, the pad must first be installed on one side of the inner wall of the cover. At this time, the pad can cover the cleaning dead corners inside the cover. During slurry mixing, the pad prevents slurry from splashing into the cleaning dead corners of the top cover. Therefore, when cleaning the mixer after mixing, there is no need to clean these dead corners. This invention eliminates the problem of difficult-to-clean cleaning dead corners, prevents the accumulation of dry impurities in these areas, and avoids scratching the inner walls of these corners during cleaning. This effectively reduces slurry contamination during subsequent mixing operations. Furthermore, because the pad material has a lower coefficient of friction than the top cover material, and the pad and top cover are detachably connected, cleaning the pad is not only easy, but it is also easy to remove and clean it separately, effectively reducing the difficulty of cleaning the mixer.

[0016] Compared with the prior art, the mixer cover assembly provided by the present invention can cover the cleaning dead corners inside the cover by installing a pad on one side of the inner wall of the cover, thereby preventing slurry from splashing and adhering to the cleaning dead corners of the cover. There is no need to clean the cleaning dead corners of the cover, and there is no situation where the inner wall of the cleaning dead corners of the cover is scratched and metal shavings fall off. Moreover, since the friction coefficient of the pad material is lower than that of the cover material, the slurry splashed onto the pad is easy to clean and will not produce dry material impurities that contaminate the slurry.

[0017] The mixer provided by the present invention includes the above-mentioned mixer cover assembly, and thus the mixer and the above-mentioned mixer cover assembly can achieve the same technical effect. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A partial structural diagram of a mixer including a mixer cover assembly, provided for an embodiment of the present invention; Figure 2 A top view of the pad provided in an embodiment of the present invention; Figure 3 This is a top view of the plate provided in an embodiment of the present invention.

[0020] Icons: 1-Top cover; 10-Feed pipe; 2-Plate; 20-Through hole; 21-Plate body; 210-Notch; 3-Stirring shaft; 30-Main shaft for twisted pulp; 300-Twisted pulp; 31-Main shaft for dispersion; 310-Dispersion disc. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] Example: like Figures 1-2 As shown, the mixer cover assembly provided in this embodiment of the invention includes a cover 1 and a pad 2; the friction coefficient of the material of the pad 2 is lower than that of the material of the cover 1, and the pad 2 is detachably installed on one side of the inner wall of the cover 1 to cover the cleaning dead corner inside the cover 1.

[0028] The mixer cover assembly provided in this embodiment of the invention is applied to a mixer. Specifically, the mixer is used to stir the cell slurry during the lithium battery production process. The mixer typically includes a tank with an opening at the top. The mixer cover assembly provided in this embodiment of the invention is installed on the opening at the top of the tank to seal the tank.

[0029] like Figure 1As shown, during the process of using a mixer to stir the battery cell slurry inside the tank, the pad 2 needs to be installed on one side of the inner wall of the top cover 1. At this time, the pad 2 can cover the cleaning dead corners inside the top cover 1. When stirring the slurry, the pad 2 can prevent the slurry from splashing into the cleaning dead corners of the top cover 1. Therefore, it is not necessary to clean the cleaning dead corners of the top cover 1 during the cleaning process of the mixer after stirring. Thus, the mixer top cover assembly provided in this embodiment of the invention will not cause the problem of the cleaning dead corners of the top cover 1 being difficult to clean. No dry material impurities will be generated in the cleaning dead corners of the top cover 1, and the inner wall of the cleaning dead corners will not be scratched during the cleaning process of the top cover 1. In subsequent stirring operations, it can effectively reduce the contamination of the slurry.

[0030] Furthermore, since the friction coefficient of the material of the pad 2 is lower than that of the material of the cover 1, and the pad 2 and the cover 1 are detachably connected, it is not only easy to clean the pad 2 during the cleaning process of the mixer, but also easy to remove the pad 2 and clean it separately, thereby effectively reducing the difficulty of cleaning the mixer.

[0031] It should be noted that even if there is slurry adhering to the non-cleaning dead corner area on the inner wall of the top cover 1 after the mixing operation is completed, the cleaning operation of the top cover 1 is easy to carry out because the cleaning of the non-cleaning dead corner area on the inner wall of the top cover 1 is not difficult, and there will be no dry material impurities adhering to the inner wall of the top cover 1 or scratches on the inner wall.

[0032] Compared with the prior art, the mixer cover assembly provided in this embodiment of the invention can cover the cleaning dead corners inside the cover 1 by installing a pad 2 on one side of the inner wall of the cover 1. This prevents slurry from splashing and adhering to the cleaning dead corners of the cover 1, eliminating the need to clean the cleaning dead corners of the cover 1 and preventing scratches on the inner wall of the cleaning dead corners of the cover 1 that could cause metal shavings to fall off. Furthermore, since the friction coefficient of the pad 2 material is lower than that of the cover 1 material, the slurry splashed onto the pad 2 is easy to clean and will not produce dry material impurities that contaminate the slurry.

[0033] It should be noted that, in order to facilitate cleaning of the mixer, the inner wall of the mixer tank and the inner wall of the top cover 1 can be coated with a smooth coating made of a low-friction coefficient material such as Teflon. The smooth coating is used to prevent the slurry from adhering to the inner wall of the tank and the inner wall of the top cover, thereby improving the ease of cleaning the slurry.

[0034] When the inner wall of the cover 1 is coated with a smooth coating made of Teflon, the coefficient of friction of the material of the pad 2 can be lower than that of Teflon.

[0035] There are several ways to detachably connect the pad 2 and the top cover 1, such as by fasteners like screws or magnetic connection. Alternatively, to reduce damage to the top cover 1 and improve the connection stability between the top cover 1 and the pad 2, the pad 2 and the top cover 1 can be interlocked.

[0036] There are also various snap-fit ​​methods, such as using snap-fit ​​components like elastic snap pins to achieve the snap-fit ​​between the pad 2 and the top cover 1.

[0037] In one embodiment, the top cover 1 is groove-shaped, and the inner peripheral wall of the top cover 1 is provided with an annular groove extending along its circumference. The outer edge of the pad 2 is engaged in the groove to cover the cleaning dead corner between the inner peripheral wall of the top cover 1 and the bottom of the groove.

[0038] To further improve the snap-fit ​​stability between the top cover 1 and the pad 2 and to prevent slurry from entering the slot, the edge of the pad 2 can be interference-fitted with the slot.

[0039] Furthermore, the slot can be set at the bottom of the slot on the inner peripheral wall of the upper cover 1, so that the pad 2, which is engaged in the slot, can fit against the bottom of the slot of the upper cover 1. At this time, the bottom of the slot of the upper cover 1 can generate friction between the pad 2 and the pad 2, which can further improve the installation stability of the pad 2 inside the upper cover 1 during the stirring operation.

[0040] In one embodiment, such as Figure 2 As shown, the pad 2 is provided with a through hole 20 for the mixing shaft 3 of the mixer to pass through.

[0041] It should be noted that, in order to achieve the mixing function of the mixer, such as Figure 1 As shown, the mixer typically includes a stirring shaft 3, which is usually installed at the top cover 1 of the mixer's top cover assembly. Thus, after the mixer's top cover assembly is installed on the top of the mixer's tank, the stirring shaft 3 extends into the tank. Furthermore, the mixer typically includes a rotary drive device, which is usually installed above the top cover 1, and its output end is fixedly connected to the stirring shaft 3. When the rotary drive device is activated, the stirring shaft 3 rotates within the tank, thereby stirring the slurry within the tank.

[0042] Therefore, a through hole 20 is made in the pad 2 for the mixing shaft 3 of the mixer to pass through, which can prevent the pad 2 from obstructing the installation and rotation process of the mixing shaft 3.

[0043] The rotary drive device can be a motor or a rotary cylinder.

[0044] To further improve the mixing effect of the slurry, such as Figure 1 As shown, the mixer typically has multiple mixing shafts 3, which are divided into a main mixing shaft 30 for slurry preparation and a main dispersing shaft 31 for dispersion. The main mixing shaft 30 is equipped with slurry 300, and one side of the main dispersing shaft 31 is connected to a dispersing rod. Multiple dispersing discs 310 are installed on the dispersing rod at intervals along its axial direction. Correspondingly, the pad 2 needs to have multiple through holes 20, each corresponding to one of the multiple mixing shafts 3.

[0045] like Figure 1 As shown, the blades of the twisted pulp 300 are a continuous spiral or a twisted structure similar to a braid. The twisted pulp 300 helps to generate axial flow when rotating, thereby realizing the up-and-down tumbling, shearing and uniform mixing of the pulp in the tank.

[0046] The dispersing disc 310 is a continuous, flat disc with an alternating serrated structure on its outer edge. The dispersing disc 310 is used to generate shearing force and impact, which can realize the crushing, dispersing, mixing and emulsifying of the slurry, thereby improving the mixing effect of the slurry.

[0047] The upper cover 1 can be equipped with multiple rotary drive devices. The bottom side of the upper cover 1 has through holes for the output ends of the multiple rotary drive devices to pass through. The output ends of the multiple rotary drive devices are connected to the multiple stirring shafts 3 one by one by fasteners such as fixing screws. Thus, not only is there a cleaning dead corner between the inner circumferential wall of the upper cover 1 and the bottom of the tank, but the connection between the output end of the rotary drive device and the stirring shaft 3 on the bottom side of the upper cover 1 (the fixing screw) is also a cleaning dead corner. At this time, the pad 2 can not only cover the connection position between the inner circumferential wall of the upper cover 1 and the bottom of the tank, but also cover the connection position between the output end of the rotary drive device and the stirring shaft 3. This prevents the slurry from splashing to the connection position between the output end of the rotary drive device and the stirring shaft 3 during the operation of the mixer. This effectively prevents the connection position between the output end of the rotary drive device and the stirring shaft 3 from being difficult to clean and leaving dry material, or from requiring too much force and tools during cleaning and causing metal shavings to fall off. This effectively protects the slurry in the tank and prevents the slurry from being contaminated and affecting the performance of the battery cell.

[0048] In one embodiment, such as Figure 1 As shown, a feed inlet can be provided on the circumferential side wall of the upper cover 1. The feed inlet is lower than the pad 2, and a feed pipe 10 is connected to the feed inlet.

[0049] The feed pipe 10 is used to introduce slurry into the tank. Since the feed port is lower than the pad plate 2, it can prevent the slurry from entering between the pad plate 2 and the bottom of the upper cover 1 and producing dry slurry, thereby preventing the difficulty of cleaning the slurry.

[0050] like Figure 1 and Figure 2 As shown, a gap is provided between the inner wall of the through hole 20 and the outer wall of the stirring shaft 3.

[0051] The gap between the inner wall of the through hole 20 and the outer wall of the stirring shaft 3 can prevent the stirring shaft 3 from rubbing against the pad 2 at the through hole 20 for a long time during the operation of the mixer, thereby preventing the pad 2 from wearing and shedding powder due to long-term friction, and thus effectively preventing the powder from the pad 2 from affecting the performance of the slurry in the tank.

[0052] Furthermore, the gap between the through hole 20 and the stirring shaft 3 is 1-2 mm.

[0053] The gap between the through hole 20 and the stirring shaft 3 is 1-2 mm, which can not only effectively prevent the stirring shaft 3 from rubbing against the pad 2 and causing powder to fall off, but also effectively prevent the gap between the stirring shaft 3 and the pad 2 from being too large and allowing too much slurry to enter, thereby effectively preventing the pad 2 from becoming more difficult to clean.

[0054] In one embodiment, both the through hole 20 and the stirring shaft 3 can be cylindrical, and correspondingly, the diameter of the through hole 20 can be 1-2 mm larger than the diameter of the stirring shaft 3.

[0055] The material of the pad 2 can be selected according to actual needs. For example, the material of the pad 2 can be perfluoroether.

[0056] Compared to Teflon, perfluoroether has better high-temperature resistance and higher chemical stability (perfluoroether can be used for a long time in high-temperature environments of 260-290℃, and maintains low permeability, flame retardancy and electrical insulation at high temperatures. Perfluoroether can withstand more than 1,600 kinds of strong acids, strong alkalis and organic solvents; while Teflon can only withstand a maximum temperature of 200℃, and it is easily deformed at high temperatures and is also more sensitive to some strong oxidants). Therefore, when the pad 2 is made of perfluoroether, the service life of the pad 2 can be effectively extended. At the same time, it can prevent Teflon material from being easily damaged and falling off after long-term use and falling into the slurry to form impurities, thereby effectively ensuring the performance of the slurry and the battery cell.

[0057] In addition, compared to Teflon, perfluoroether has a lower coefficient of friction, which can further prevent a large amount of slurry from adhering to the surface of the pad 2, while effectively reducing the difficulty of cleaning the pad 2.

[0058] In one embodiment, such as Figure 2 and Figure 3 As shown, the pad 2 includes multiple plates 21, which are spliced ​​together to form the pad 2, and any two adjacent plates 21 in a group can be detachably connected.

[0059] When the pad 2 is formed by splicing together multiple detachably connected plates 21, the multiple plates 21 can be installed sequentially inside the upper cover 1, thereby realizing the installation process of the pad 2 inside the upper cover 1. Correspondingly, when removing the pad 2 from the upper cover 1, the multiple plates 21 can be removed sequentially from the upper cover 1, thereby realizing the overall disassembly process of the pad 2.

[0060] It can be seen that, compared to a single pad 2, when the pad 2 is formed by splicing together multiple detachable and connected plates 21, the ease of installation and removal of the pad 2 inside the upper cover 1 can be effectively improved.

[0061] It should be noted that when the pad 2 has a through hole 20, such as Figure 3 As shown, notches 210 can be provided on the adjacent sides of two adjacent plates 21. When two adjacent plates 21 are spliced ​​together, the notches 210 on the adjacent sides of the two plates 21 can be spliced ​​to form a through hole 20.

[0062] When the through hole 20 is formed by splicing the notch 210, it is easy for the stirring shaft 3 to pass through the through hole 20 on the pad 2, effectively preventing the stirring shaft 3 from obstructing the installation and removal process of the pad 2 inside the upper cover 1, and further improving the ease of installation and removal of the pad 2.

[0063] The number of plates 21 is not limited and can be selected according to actual needs, for example... Figure 2 As shown, there can be four plates 21.

[0064] Furthermore, there are no restrictions on the overall shape of the pad 2; the overall shape of the pad 2 needs to be selected according to the shape of the upper cover 1. Since the bottom of the groove of the upper cover 1 is usually circular, the pad 2 can also be circular. Correspondingly, when the pad 2 includes four plates 21, each plate 21 can be a sector with an inner angle of 90 degrees.

[0065] Based on this, the notch 210 can be set on the two right-angled sides of the plate 21. When the four fan-shaped plates 21 are spliced ​​together to form the pad 2, the notches 210 on the two adjacent plates 21 can be spliced ​​together to form the through hole 20.

[0066] There are several ways to detach two adjacent plates 21, such as by snap-fit ​​or by suction cup.

[0067] In one embodiment, two adjacent plates 21 are detachably connected by a plug-in structure, which includes a plug-in protrusion and a plug-in groove. In the two adjacent plates 21, one plate 21 has a plug-in protrusion on its side and the other plate 21 has a plug-in groove on its side. The plug-in protrusion is inserted into the plug-in groove in a direction parallel to the pad 2.

[0068] Compared to clips and suction cups, the plug-in structure can effectively improve the ease of installation and removal between two adjacent plates 21 while ensuring the connection stability between them. It also effectively ensures the smoothness of the surface of the pad 2 and prevents the formation of dry material impurities in the cleaning dead corners on the surface of the pad 2.

[0069] It should also be noted that when any two adjacent plates 21 are connected to each other through a plug-in structure, and the outer edge of the pad 2 is engaged in the slot of the inner peripheral wall of the top cover 1, since the plug-in protrusion is inserted into the plug-in groove in a direction parallel to the pad 2, the plug-in structure can also interact with the slot at this time, effectively improving the plug-in stability between the two adjacent plates 21, and effectively improving the engagement stability of the pad 2 in the slot.

[0070] Furthermore, when the pad 2 includes four plates 21, and each plate 21 is a fan-shaped structure with an inner angle of 90 degrees, the insertion protrusions or insertion grooves on the side of the plate 21 can be provided on the two right-angled side edges of the plate 21.

[0071] To effectively improve the connection stability between two adjacent plates 21, two connection structures can be provided between any two adjacent plates 21, and the two connection structures are located on both sides of the through hole 20 respectively.

[0072] In addition, to improve the insertion balance between two adjacent plates 21 and thus improve the insertion stability between the plates 21, one of the two adjacent plates 21 has an insertion protrusion and an insertion groove on both sides of a notch 210 on one right-angled side, and the other has an insertion protrusion and an insertion groove on both sides of a notch 210 on the other right-angled side; correspondingly, the other plate 21 has an insertion groove and an insertion protrusion on both sides of a notch 210 on one right-angled side, and the other has an insertion groove and an insertion protrusion on both sides of a notch 210 on the other right-angled side.

[0073] Among them, any set of matching plug protrusions and plug grooves can be interference-fitted, and the interference fit can further improve the plugging stability between two adjacent plates 21.

[0074] To further improve the stability of the connection between the protrusion and the groove, the protrusion can be cylindrical in shape, with a spherical plug at its free end. Correspondingly, the bottom of the groove has a recess that matches the spherical plug, and the cross-sectional area of ​​the recess is larger than that of the groove. When the protrusion is inserted into the groove, the spherical plug must first be squeezed through the groove and then enter the recess. At this point, the connection between the recess and the groove can limit the movement of the spherical plug, preventing it and the protrusion from detaching from the groove.

[0075] like Figure 1 As shown, an embodiment of the present invention also provides a mixer, which includes the above-described mixer cover assembly.

[0076] The mixer provided in this embodiment of the invention also includes a tank, a stirring shaft 3, and a rotary drive device. The upper cover 1 of the mixer upper cover assembly covers the opening at the top of the tank. The rotary drive device is installed above the upper cover 1, and the top of the upper cover 1 is provided with a through hole for the output end of the rotary drive device to pass through. The stirring shaft 3 is installed inside the tank, and one end of the stirring shaft 3 is fixedly connected to the output end of the rotary drive device. The rotary drive device is used to drive the stirring shaft 3 to rotate in order to stir the slurry in the tank.

[0077] To improve the mixing effect of the slurry, there can be multiple mixing shafts 3. The multiple mixing shafts 3 include at least one twisted slurry main shaft 30 and at least one dispersion main shaft 31. Twisted slurry 300 is installed on the twisted slurry main shaft 30. A dispersion rod is connected to one side of the dispersion main shaft 31. Multiple dispersion discs 310 are provided on the dispersion rod at intervals along its axial direction.

[0078] As mentioned earlier, the blades of the spiral slurry 300 have a continuous spiral or a twisted structure resembling a braid. The spiral slurry 300 facilitates axial flow during rotation, thereby enabling the slurry to tumble, shear, and mix uniformly within the tank. The dispersing disc 310 is a continuous, flat disc with alternating serrated edges on its outer edge. The dispersing disc 310 generates shearing and impact forces, enabling the slurry to be crushed, dispersed, mixed, and emulsified, thus improving the mixing effect of the slurry.

[0079] Furthermore, there can be multiple rotary drive devices, and the output ends of the multiple rotary drive devices are connected one-to-one with the multiple stirring shafts 3. Alternatively, there can be one rotary drive device, in which case the output end of the rotary drive device is connected to multiple transmission mechanisms, and the multiple transmission mechanisms are connected one-to-one with the multiple stirring shafts 3.

[0080] The rotary drive device can be a motor or rotary cylinder or other device capable of outputting rotary driving force.

[0081] It should be noted that, since the mixer provided in this embodiment of the invention includes the above-mentioned mixer cover assembly, the mixer can also use the pad 2 detachably installed on one side of the inner wall of the cover 1 to cover the cleaning dead corner inside the cover 1, thereby preventing the slurry from splashing and adhering to the cleaning dead corner of the cover 1. There is no need to clean the cleaning dead corner of the cover 1, and there will be no situation where the inner wall of the cleaning dead corner of the cover 1 is scratched and metal shavings fall off. In addition, since the friction coefficient of the pad 2 material is lower than that of the cover 1 material, it is also easy to clean the slurry splashed onto the pad 2, and no dry material impurities will be generated to contaminate the slurry.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mixer cover assembly, characterized in that, The mixer cover assembly includes a cover (1) and a pad (2); The friction coefficient of the material of the pad (2) is lower than that of the material of the cover (1). The pad (2) is detachably installed on one side of the inner wall of the cover (1) to cover the cleaning dead corner inside the cover (1).

2. The mixer cover assembly according to claim 1, characterized in that, The pad (2) is snapped together with the top cover (1).

3. The mixer cover assembly according to claim 2, characterized in that, The upper cover (1) is groove-shaped, and the inner peripheral wall of the upper cover (1) is provided with an annular groove extending along its circumference. The outer edge of the pad (2) is engaged in the groove to cover the cleaning dead corner between the inner peripheral wall of the upper cover (1) and the bottom of the groove.

4. The mixer cover assembly according to claim 2, characterized in that, The pad (2) is provided with a through hole (20) through which the stirring shaft (3) of the mixer passes.

5. The mixer cover assembly according to claim 4, characterized in that, A gap is provided between the inner wall of the through hole (20) and the outer wall of the stirring shaft (3).

6. The mixer cover assembly according to claim 5, characterized in that, The gap between the through hole (20) and the stirring shaft (3) is 1-2 mm.

7. The mixer cover assembly according to any one of claims 1-6, characterized in that, The material of the pad (2) is perfluoroether.

8. The mixer cover assembly according to any one of claims 1-6, characterized in that, The pad (2) includes multiple plates (21), which are spliced ​​together to form the pad (2), and any two adjacent plates (21) can be detachably connected.

9. The mixer cover assembly according to claim 8, characterized in that, The two adjacent plates (21) are detachably connected by a plug-in structure, which includes a plug-in protrusion and a plug-in groove; In two adjacent plates (21), one plate (21) has the insertion protrusion on its side and the other plate (21) has the insertion groove on its side. The insertion protrusion is inserted into the insertion groove in a direction parallel to the pad (2).

10. A mixer, characterized in that, The mixer includes the mixer cover assembly as described in any one of claims 1-9.

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