A mixing blade for a powder mixer

Abstract

The application discloses a stirring blade of a powder mixer, which comprises a mounting sleeve used for being connected with a stirring main shaft, a scraping mechanism, the scraping mechanism comprising at least one scraping piece, the scraping piece comprising a mounting seat and a scraping plate, the mounting seat being fixedly arranged on the mounting sleeve, and the scraping plate being detachably arranged on the mounting seat, and a mixing mechanism, the mixing mechanism comprising at least one mixing piece, any mixing piece comprising a base and a mixing blade, the base being fixedly arranged on the mounting sleeve, and the mixing blade being detachably arranged on the base. The stirring blade of the powder mixer can accurately adjust the mounting position and angle of the scraping plate according to the size of the inner wall of a stirring tank body, ensures that the scraping plate can closely adhere to the tank wall in the rotating process, and completely removes the residual powder in the gap between the traditional stirring blade and the tank wall.

Description

Technical Field

[0001] This utility model relates to the field of mixing equipment technology, specifically to a mixing blade for a powder mixer. Background Technology

[0002] In numerous fields such as chemical, food, pharmaceutical, and new energy, powder mixers serve as core equipment for material mixing and reaction. The performance of their mixing blades directly determines production efficiency, material mixing uniformity, and equipment operation and maintenance costs. Whether it's the dissolution and mixing of chemical raw materials, the homogenization and dispersion of food seasonings, or the stabilization treatment of pharmaceutical preparations, all rely on the rotational motion of the mixing blades to achieve thorough mixing and dispersion of powders.

[0003] Due to the inherent gravity of the powder and its adhesion to the tank wall, two typical problems easily occur during the mixing process: First, some powder will deposit at the bottom of the mixing tank, forming a buildup layer. Traditional blade rotation alone cannot fully integrate this layer with the powder above, resulting in low mixing efficiency and requiring extended mixing time to achieve the desired mixing effect. Second, a safety gap must be reserved between the mixing blades and the inner wall of the tank to avoid friction and wear. This gap area becomes a dead zone for powder retention. The retained powder cannot participate in effective mixing and will cross-contaminate with new materials in subsequent production, seriously affecting the stability of product quality. Utility Model Content

[0004] In order to solve the technical problems existing in the prior art, this application provides a mixing blade for a powder mixer.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a mixing blade for a powder mixer, comprising: a mounting sleeve for connecting to a mixing main shaft; a scraping mechanism, comprising at least one scraping element, the scraping element comprising a mounting base and a scraping plate, the mounting base being fixedly mounted on the mounting sleeve, and the scraping plate being detachably mounted on the mounting base; and a mixing mechanism, comprising at least one mixing element, any mixing element comprising a base and a mixing blade, the base being fixedly mounted on the mounting sleeve, and the mixing blade being detachably mounted on the base.

[0006] In some embodiments of this utility model, the scraping component includes a bottom scraper, an inclined scraper, and a side scraper connected in sequence from end to end. The end of the bottom scraper away from the inclined scraper is connected to the mounting base. One side of the bottom scraper abuts against the bottom of the powder mixer. The inclined scraper abuts against the conical part of the powder mixer. The side scraper abuts against the inner wall of the powder mixer.

[0007] In some embodiments of this utility model, the mounting base is inclinedly disposed on the mounting sleeve, and the angle between the mounting direction of the mounting base and the central axis of the mounting sleeve is 10°-30°.

[0008] In some embodiments of this utility model, there are three mixing components, which are spirally arranged on the outer side wall of the mounting sleeve.

[0009] In some embodiments of this utility model, the inner wall of the mounting sleeve has several protrusions that are adapted to the outer wall of the stirring spindle.

[0010] In some embodiments of this utility model, the base has a receiving groove, and the mixing blade can extend into the receiving groove. The size of the receiving groove is adapted to the outer contour of the mixing blade, and the base and the mixing blade are connected by bolts.

[0011] Beneficial effects: 1. The scraping mechanism features a detachable design for the scraping plate and mounting base, allowing for precise adjustment of the scraping plate's installation position and angle according to the inner wall dimensions of the mixing tank. This ensures that the scraping plate fits tightly against the tank wall during rotation, thoroughly removing residual powder from the gap between the traditional mixing blades and the tank wall.

[0012] 2. The independent design of the mixing blades and base in the mixing mechanism allows for flexible selection and installation of different shapes and numbers of mixing blades based on the particle size, specific gravity, and other characteristics of the powder. During the mixing process, the mixing blades exert multi-directional shearing and dispersing forces on the powder, effectively breaking up powder clumps and enabling the powder to form a three-dimensional circulating flow within the tank. This significantly improves the uniformity of mixing and avoids product performance differences caused by uneven mixing.

[0013] 3. The detachable connection structure between the scraper and the mounting base, and between the mixing blade and the base, means that when the scraper or mixing blade is damaged due to wear or corrosion, it is not necessary to replace the entire blade assembly; only the damaged parts need to be replaced, which can effectively reduce the cost of operating the equipment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a structural illustration of an embodiment of this application. Figure 1 ; Figure 2 This is a structural illustration of an embodiment of this application. Figure 2 ; Figure 3 This is a schematic diagram of the scraping plate according to an embodiment of this application; In the figure: 1-mounting sleeve; 2-mounting base; 3-scraper; 301-bottom scraper; 302-inclined scraper; 303-side scraper; 4-base; 5-mixing blade; 6-protrusion; 7-accommodating groove. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0018] 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.

[0019] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for 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 limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0021] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Example

[0022] Please refer to Figures 1-3 This embodiment provides a mixing blade for a powder mixer, comprising: a mounting sleeve 1 for connecting to a mixing spindle; a scraping mechanism including at least one scraping component, the scraping component including a mounting base 2 and a scraping plate 3, the mounting base 2 being fixedly mounted on the mounting sleeve 1, and the scraping plate 3 being detachably mounted on the mounting base 2; and a mixing mechanism including at least one mixing component, any mixing component including a base 4 and a mixing blade 5, the base 4 being fixedly mounted on the mounting sleeve 1, and the mixing blade 5 being detachably mounted on the base 4.

[0023] In this embodiment, the mounting sleeve 1 is used to connect to the stirring spindle, which is driven by an external motor to rotate. The mounting sleeve 1 is fixedly installed on the stirring spindle, serving as the mounting base for all functional components. When the spindle rotates, the mounting sleeve 1 drives all mechanisms on it to rotate together. The scraping mechanism and mixing mechanism installed on the mounting sleeve 1 rotate accordingly, starting to process the powder in the container.

[0024] Furthermore, the aforementioned scraping mechanism is used to scrape off the powder adhering to the inner wall of the mixing tank. Specifically, the aforementioned mounting base 2 is securely fixed to the mounting sleeve 1 with bolts, providing robust support. The aforementioned scraper plate 3 is detachably mounted at the end of the mounting base 2 via bolt connection. The shape of its working end closely conforms to the shape of the inner wall of the mixing tank. As the main shaft rotates, the scraper plate 3 moves in a circular motion against the inner wall of the mixing tank under the action of centrifugal force. During the movement, the working edge of the scraper plate 3 scrapes off the powder adhering to the inner wall. This powder may adhere to the wall due to moisture, static electricity, or its inherent properties. If not cleaned in time, it will form hard lumps, affecting the mixing uniformity and causing material waste.

[0025] In traditional mixers, the area near the inner wall is a low-speed flow zone where materials struggle to participate in the main mixing process. A scraping mechanism forcibly removes material from these areas and pushes it into the active mixing zone in the center of the mixing tank, ensuring that all materials are effectively processed.

[0026] In this embodiment, the aforementioned mixing mechanism is used to achieve macroscopic convection and microscopic diffusion of the powder, ensuring a uniform distribution of its components. Specifically, the base 4 is welded and fixed to the mounting sleeve 1, but its installation angle and position are specially designed to optimize the flow pattern. The aforementioned mixing blades 5 are detachably mounted on the base 4. The blades have various shapes, and their inclination angle and curvature determine the direction and force of pushing the material.

[0027] The rotating mixing blades 5 apply a force to the powder. Depending on the blade's installation angle, this force can be decomposed into axial and radial forces, specifically: Axial force: Propelling the powder along the direction of the mixing shaft. For example, a blade with a helical angle will push the material from the bottom to the top, or from the top to the bottom.

[0028] Radial force: Propelling the powder along the radius of the mixing drum, throwing the material at the center towards the drum wall, or drawing the material from the outside towards the center. By rationally arranging multiple mixing components, a three-dimensional and complex material circulation flow field can be formed inside the drum.

[0029] As powder flows across the blade surface or slides between powder layers at different speeds, a shearing effect is generated. This helps break up powder clumps and increases the contact interface between particles, further achieving uniform distribution through microscopic diffusion.

[0030] Please refer to Figures 1-3 In some embodiments of this example, the scraping component includes a bottom scraper 301, an inclined scraper 302, and a side scraper 303 connected in sequence. The end of the bottom scraper 301 away from the inclined scraper 302 is connected to the mounting base 2. One side of the bottom scraper 301 abuts against the bottom of the powder mixer. The inclined scraper 302 abuts against the conical part of the powder mixer. The side scraper 303 abuts against the inner wall of the powder mixer.

[0031] In this embodiment, the scraping component is a composite scraper arm composed of three scrapers connected end to end: a bottom scraper 301, an inclined scraper 302, and a side scraper 303. The bottom scraper 301 is connected to the mounting base 2 at one end and mainly covers the flat or rounded bottom area of ​​the mixing tank to prevent powder accumulation at the bottom, especially to remove material from the central area. The inclined scraper 302 connects the bottom scraper 301 and the side scraper 303, closely conforming to the conical wall of the mixing tank to solve the problem of material retention and adhesion most easily occurring in the conical transition area. The side scraper 303 is located at the outermost end, abutting against the vertical wall area of ​​the mixing tank, and is used to scrape off the adhering material on the vertical wall and guide it downwards. The three scrapers are connected end to end to form a continuous, dead-angle-free scraping edge, which can smoothly scrape the entire path from the bottom center to the upper part of the side wall. Each part comes into contact with the corresponding area of ​​the barrel wall. During the mixing process, the scraper can always fit tightly against the barrel wall under centrifugal force or its own elastic design, achieving the best scraping effect.

[0032] Please refer to Figure 1 and Figure 2 In some embodiments of this example, the mounting base 2 is inclinedly disposed on the mounting sleeve 1, and the angle between the mounting direction of the mounting base 2 and the central axis of the mounting sleeve 1 is 10°-30°.

[0033] It should be noted that if the mounting base 2 is parallel to the main shaft, i.e., the included angle is 0°, the entire scraping mechanism will rotate in a two-dimensional plane perpendicular to the main shaft. Its main function is radial scraping, pushing the material away from the barrel wall.

[0034] In this embodiment, when the mounting direction of the mounting base 2 forms an angle of 10°-30° with the axis of the main shaft, the entire motion trajectory of the scraper changes from a plane to a three-dimensional, conical spatial curved surface. Specifically, by introducing an axial force component, the direction of motion of the scraper during rotation can be decomposed into two main components: Radial component: Perpendicular to the main axis, responsible for scraping material off the barrel wall.

[0035] Axial component: Parallel to the main shaft, responsible for pushing materials along the direction of the main shaft.

[0036] The top of the aforementioned mounting base 2 is further away from the main shaft than its bottom. As it rotates, the inclined scraper generates an upward lifting force on the material. The scraped material no longer simply falls inwards but is guided along the inclined scraper surface and thrown into the upper space. This upward flow of material, in conjunction with the specially designed mixing blades 5 for pushing material downwards, forms a strong, orderly axial circulation within the mixing tank. The material is lifted to the top by the scraping mechanism and then pressed back to the bottom by the mixing mechanism, repeating this cycle. This mixing efficiency is far superior to that of disordered turbulent flow.

[0037] Please refer to Figure 1 and Figure 2 In some embodiments of this example, there are three mixing components, which are spirally arranged on the outer side wall of the mounting sleeve 1.

[0038] In this embodiment, the mixing components are arranged in a spiral pattern, with the spiral direction designed to push the material from the top to the bottom of the mixing tank. The upper mixing components capture the material on the surface and push it downwards along the spiral direction. The middle mixing components continue to push, and the bottom mixing components finally push the material to the bottom of the tank. This downward thrust works perfectly with the previously mentioned inclined scraping mechanism. The scraping mechanism scrapes up and sends the material from the bottom and edges upwards, while the mixing components push the material from the top and center downwards. This up-and-down motion forms a strong vertical circulation loop that runs through the entire tank, achieving efficient mixing.

[0039] Please refer to Figure 1 and Figure 2 In some embodiments of this example, the inner wall of the mounting sleeve 1 has a plurality of protrusions 6 that are adapted to the outer wall of the stirring spindle.

[0040] In this embodiment, several protrusions 6 on the inner side of the mounting sleeve 1 are adapted to the outer groove of the stirring spindle. The protrusions 6 and the groove constitute a multi-tooth meshing system. Unlike traditional single-key connections with only one or two small contact points, this multi-protrusion system significantly increases the contact area for power transmission. The torque is evenly distributed through the sides of all these protrusions 6. When the spindle starts to rotate, the side of the groove on the spindle immediately pushes the side of the protrusions 6 inside the mounting sleeve 1. Due to the large contact area, the pressure per unit area is very small, thus achieving extremely smooth, efficient, and slip-free torque transmission.

[0041] Please refer to Figure 2 In some embodiments of this example, the base 4 has a receiving groove 7, and the mixing blade 5 can extend into the receiving groove 7. The size of the receiving groove 7 is adapted to the outer contour of the mixing blade 5. The base 4 and the mixing blade 5 are connected by bolts.

[0042] In this embodiment, the high-precision fitting receiving groove 7 provides precise positioning and a large bearing contact area for the mixing blade 5, realizing the uniform distribution and efficient transmission of the working load; and the bolt connection provides a huge clamping force to securely lock the blade in the groove and prevent it from falling off.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A mixing blade for a powder mixer, characterized in that, include: Mounting sleeve (1), the mounting sleeve (1) is used to connect with the stirring spindle; The scraping mechanism includes at least one scraping component, which includes a mounting base (2) and a scraping plate (3). The mounting base (2) is fixedly mounted on the mounting sleeve (1), and the scraping plate (3) is detachably mounted on the mounting base (2). A mixing mechanism, the mixing mechanism including at least one mixing element, each of the mixing elements including a base (4) and a mixing blade (5), the base (4) being fixedly disposed on the mounting sleeve (1), and the mixing blade (5) being detachably disposed on the base (4).

2. The mixing blade of a powder mixer according to claim 1, characterized in that, The scraping component includes a bottom scraper (301), an inclined scraper (302), and a side scraper (303) connected in sequence from end to end. The end of the bottom scraper (301) away from the inclined scraper (302) is connected to the mounting base (2). One side of the bottom scraper (301) abuts against the bottom of the powder mixer. The inclined scraper (302) abuts against the conical part of the powder mixer. The side scraper (303) abuts against the inner wall of the powder mixer.

3. The mixing blade of a powder mixer according to claim 1, characterized in that, The mounting base (2) is inclined on the mounting sleeve (1), and the angle between the mounting direction of the mounting base (2) and the central axis of the mounting sleeve (1) is 10°-30°.

4. The mixing blade of a powder mixer according to claim 1, characterized in that, There are three mixing components, which are spirally arranged on the outer side wall of the mounting sleeve (1).

5. The mixing blade of a powder mixer according to claim 1, characterized in that, The inner wall of the mounting sleeve (1) has several protrusions (6) that are adapted to the outer wall of the stirring spindle.

6. The mixing blade of a powder mixer according to claim 1, characterized in that, The base (4) has a receiving groove (7), and the mixing blade (5) can extend into the receiving groove (7). The size of the receiving groove (7) is adapted to the outer contour of the mixing blade (5). The base (4) and the mixing blade (5) are connected by bolts.

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