High-efficiency stirring equipment based on special-shaped blades

Abstract

This utility model discloses a high-efficiency mixing device based on irregularly shaped blades, belonging to the field of material mixing and stirring technology. It includes a mixing tank, a mixing shaft, and multiple mixing blade assemblies mounted on the mixing shaft. Each mixing blade assembly includes a hub and irregularly shaped blades. The irregularly shaped blades have a three-dimensional bent structure, consisting of a root fixed section, a middle twisted section, and an end bent section connected sequentially. The middle twisted section is twisted relative to the root fixed section along the stirring direction, and the end bent section bends towards the bottom of the tank along the middle twisted section. The structure protected by this utility model enables the blades to simultaneously generate strong radial shear flow and axial thrust flow during rotation, forming a highly efficient, dead-zone-free three-dimensional circulating flow field, significantly improving mixing efficiency and quality. It is particularly suitable for mixing high-viscosity or easily settling materials, while also offering energy-saving and consumption-reducing advantages.

Description

Technical Field

[0001] This utility model relates to the field of material mixing and stirring, and in particular to a high-efficiency stirring device based on irregularly shaped blades. Background Technology

[0002] Mixing equipment is a common device used in industries such as chemical, food, pharmaceutical, and environmental protection for mixing, stirring, and homogenizing materials. Traditional mixing equipment mostly uses standard types of mixing blades such as straight-blade impellers, inclined-blade impellers, and turbine impellers. These blades often have the following problems during the mixing process: Traditional blades can only form a planar flow field in one direction (such as radial or axial). Materials are prone to stagnation and dead zones at the bottom of the mixing tank, the tank wall and the gap between the blades. Especially for high-viscosity materials (such as coatings and adhesives) or mixed systems containing solid particles, agglomeration and clumping are likely to occur, resulting in insufficient mixing uniformity and low efficiency.

[0003] Therefore, a high-efficiency mixing device based on irregularly shaped blades is proposed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency mixing device based on irregularly shaped blades to solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides a high-efficiency stirring device based on irregularly shaped blades, including a stirring tank, a stirring shaft, and a plurality of stirring blade assemblies disposed on the stirring shaft. The stirring blade assembly includes a hub and irregularly shaped blades. The irregularly shaped blades are three-dimensional bent structures, and each irregularly shaped blade consists of a root fixed section, a middle twisted section, and an end bent section connected in sequence. The middle twisted section is twisted relative to the root fixed section along the stirring direction, and the end bent section is bent towards the bottom of the tank along the middle twisted section.

[0006] Preferably, the torsion angle of the middle twisted section is 30~50°, and the bending angle of the end bent section is 100~120°.

[0007] Preferably, the tip of the end-bent section is provided with multiple arc-shaped protrusions.

[0008] Preferably, the surface of the irregularly shaped blade is coated with polytetrafluoroethylene.

[0009] Preferably, the hub is connected to the stirring shaft, and the root fixing section of the irregular blade is connected to the hub.

[0010] Preferably, a drive motor is installed at the top center of the mixing tank via a mounting flange, and the output shaft of the drive motor extends vertically downward into the mixing tank and is connected to the mixing shaft via a coupling.

[0011] Preferably, the inner wall of the mixing tank is uniformly provided with multiple guide plates.

[0012] Therefore, the high-efficiency stirring device based on irregularly shaped blades with the above-described structure has the following beneficial effects: (1) The twisted section in the middle of the irregular blade can generate strong radial and tangential flow when rotating, which forms efficient shearing of the material; while the bent section at the end is like an inclined propeller, which can generate strong axial flow, especially the flow field rushing downwards to the bottom of the tank, which forces the material at the bottom of the tank to roll upwards, forming a strong overall circulation and eliminating the mixing dead zone.

[0013] (2) This utility model only creatively improves the blades in the traditional mixing equipment structure, without adding complex auxiliary parts. It is convenient to manufacture, install and maintain, and has high reliability. Moreover, due to the structure of the blades, the mixing efficiency is significantly improved. Under the condition of achieving the same mixing uniformity, the required mixing time is greatly shortened, thereby effectively reducing the total energy consumption of the equipment.

[0014] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a cross-sectional view of an embodiment of the present utility model; Figure label: 1. Mixing tank; 2. Mixing shaft; 3. Baffle plate; 4. Hub; 5. Irregular blades; 51. Root fixed section; 52. Middle twisted section; 53. End bent section. Detailed Implementation

[0016] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0017] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0018] Example like Figure 1 , Figure 2 As shown, this utility model provides a high-efficiency mixing device based on irregularly shaped blades 5, including a mixing tank 1, a mixing shaft 2, and multiple mixing blade assemblies arranged on the mixing shaft 2. The mixing tank 1 serves as the core container for material mixing, used to hold the materials to be mixed (such as high-viscosity liquids, materials containing particles, etc.), and also provides a mounting support foundation for components such as the drive motor, mixing shaft 2, and guide plate 3. The tank wall structure must ensure sealing and pressure resistance to prevent material leakage or structural deformation during mixing. The mixing tank 1 has a feed inlet at the upper end and a discharge outlet at the lower end, both of which are conventional features in this field.

[0019] An installation interface is reserved at the center of the top of the mixing tank 1. The drive motor is fixed by the installation flange. The output shaft of the drive motor extends vertically downward into the mixing tank 1 and is connected to the mixing shaft 2 by a coupling. The drive motor is equipped with a variable frequency speed control motor with a speed range of 50~500r / min. It outputs torque through the output shaft to drive the mixing shaft 2 and the mixing blade assembly to rotate, thereby realizing the mixing of materials.

[0020] Multiple guide plates 3 are evenly arranged around the inner wall of the mixing tank 1. They are fixed to the tank wall by welding or bolts. The plates are set vertically or slightly inclined (in the direction of stirring). The height needs to cover the main stirring area. The thickness of the guide plate 3 is 3~4mm to avoid collision with the blades. It is used to suppress the "follow-rotation phenomenon" of the material rotating synchronously with the blades during the stirring process, so as to avoid the material rotating synchronously with the blades and causing mixing failure, thereby improving the stirring efficiency.

[0021] The stirring blade assembly includes a hub 4 and irregular blades 5. The hub 4 can be connected to the stirring shaft 2 by a flat key and screws. The root fixing section 51 of the irregular blade 5 is welded to the hub 4. The irregular blade 5 is a three-dimensional bent structure, formed by one-time stamping and bending of high-strength stainless steel plate. The irregular blade 5 consists of the root fixing section 51, the middle twisting section 52, and the end bending section 53 connected in sequence. The root fixing section 51 is completely welded to the outer surface of the hub 4. The middle twisting section 52 is located between the root fixing section 51 and the end bending section 53, and is integrally formed with the two (without splicing seam). It is the functional core area of ​​the blade. It has a three-dimensional spiral twisted surface. Its twist angle is 40° relative to the root fixing section 51 (plane) and twists along the rotation direction (tangential direction) of the stirring shaft 2. The twist angle is linearly gradual along the radial direction of the blade (from the root to the tip). The twist angle at the root is 40° and the twist angle at the tip gradually transitions to 0°, forming a gradual spiral surface with "strong twist at the root and weak twist at the tip". The cross-sectional shape is similar to the streamlined cross-section of an aircraft airfoil, and the thickness gradually changes along the radial direction to reduce the resistance to material flow.

[0022] The end bending section 53 is located on the outermost side of the blade and is integrally formed with the middle twisted section 52. It is the flow guiding end of the blade. It bends 110° towards the bottom of the tank along the end of the middle twisted section 52 so that the blade tip points towards the bottom of the tank.

[0023] During operation, the drive motor starts, driving the stirring shaft 2 and the irregularly shaped stirring blade assembly to rotate at high speed. The middle twisting section 52 mainly shears and disperses the fluid, while the end bending section 53 forcefully pushes the fluid to the bottom of the tank. After impacting the bottom of the tank, the fluid returns upward along the tank wall, thus forming a strong, dead-zone-free three-dimensional circulating flow field in the mixing tank 1, achieving rapid and efficient mixing of materials.

[0024] The principle of this structure is as follows: the middle twisted section 52 is twisted 40° relative to the root fixed section 51 in the stirring direction. When rotating, its inclined blade surface will generate radial shear force and axial thrust force on the surrounding materials. The radial shear force breaks the initial agglomeration state of the materials and diffuses the materials towards the inner wall of the mixing tank 1, avoiding the materials from concentrating in the core area. The axial thrust force guides some materials to flow up and down along the stirring shaft 2, breaking the limitation of traditional planar blades that only diffuse radially, and laying the foundation for a three-dimensional flow field.

[0025] The end bending section 53 bends 110° towards the bottom of the tank along the middle twisting section 52, with the blade tip pointing directly to the bottom of the tank. When rotating, it generates a strong downward guiding force, which forces the material near the wall of the mixing tank 1 (the area that is prone to stagnation in traditional equipment) to the bottom of the tank, avoiding the formation of static dead zones at the bottom of the tank. After being blocked by the bottom of the tank, the material pushed to the bottom of the tank will rebound upward along the tank wall (in conjunction with the guide plate 3), forming a complete circulation channel of "bottom → wall → top → shaft core → bottom" with the axial material pushed by the middle twisting section 52, and finally constructing a three-dimensional flow field without dead zones in the tank. At the same time, the guide plate 3 blocks the material rotating with the blade, forcing the material to change its flow direction and forming cross-turbulence with the circulating material in the three-dimensional flow field, further enhancing the shearing and mixing effect.

[0026] In addition, the tip of the end bending section 53 is provided with multiple arc-shaped protrusions, which are integrally formed with the tip of the end bending section 53. When rotating, it can break up agglomerates in the material (such as particle agglomeration and clumps of sticky materials), so as to avoid agglomerates affecting the mixing uniformity; at the same time, it can enhance the turbulence effect of the tip and improve the local stirring intensity.

[0027] The surface of the irregular blade 5 is coated with a polytetrafluoroethylene coating through processes such as spraying and sintering. This prevents sticky materials from adhering to the blade surface (reducing cleaning difficulty) and at the same time resists the corrosion of the blade by acid, alkali and other corrosive materials, thus extending the service life of the blade.

[0028] Therefore, this utility model provides a high-efficiency mixing device based on irregularly shaped blades with the above-mentioned structure. Through the three-section irregularly shaped blades consisting of a root fixed section, a middle twisted section, and an end bent section, combined with a guide plate and a variable frequency motor, it simultaneously generates strong shear flow and high-efficiency circulating flow, which greatly improves mixing efficiency and quality and reduces energy consumption.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A high-efficiency mixing device based on irregularly shaped blades, characterized in that: The device includes a mixing tank, a mixing shaft, and multiple mixing blade assemblies mounted on the mixing shaft. Each mixing blade assembly includes a hub and irregularly shaped blades. The irregularly shaped blades are three-dimensionally bent structures, consisting of a root fixed section, a middle twisted section, and an end bent section connected in sequence. The middle twisted section is twisted relative to the root fixed section along the mixing direction, and the end bent section bends towards the bottom of the mixing tank along the middle twisted section.

2. A high efficiency mixing equipment based on profiled blades as claimed in claim 1, wherein: The twist angle of the middle twisted section is 30~50°, and the bending angle of the end bending section is 100~120°.

3. The high-efficiency stirring device based on irregularly shaped blades according to claim 1, characterized in that: The tip of the blade in the end-bending section is provided with multiple arc-shaped protrusions.

4. The high-efficiency stirring device based on irregularly shaped blades according to claim 1, characterized in that: The surface of the irregularly shaped blade is coated with polytetrafluoroethylene.

5. The high-efficiency stirring device based on irregularly shaped blades according to claim 1, characterized in that: The hub is connected to the stirring shaft, and the root fixing section of the irregular blade is connected to the hub.

6. The high-efficiency stirring device based on irregularly shaped blades according to claim 1, characterized in that: A drive motor is installed at the top center of the mixing tank via a mounting flange. The output shaft of the drive motor extends vertically downward into the mixing tank and is connected to the mixing shaft via a coupling.

7. The high-efficiency stirring device based on irregularly shaped blades according to claim 1, characterized in that: The mixing tank has multiple guide plates evenly arranged around its inner wall.

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