ribbon blender

Abstract

The utility model belongs to the technical field of stirring equipment, and relates to a screw belt type stirrer, which comprises a stirring shaft, a supporting rod connected with the stirring shaft, and a screw belt component connected with the supporting rod. A spoiler structure for generating local vortex flow during stirring is arranged on the screw belt component. The spoiler structure is a flow guide groove formed on the surface of the screw belt component. The flow guide groove continuously extends or is discontinuously distributed along the surface of the screw belt component. The discontinuously distributed flow guide grooves are arrayed or staggered on the surface of the screw belt component. The stirrer can optimize the fluid dynamic field during work, synchronously realize synergistic effect of macro flow and micro shear, and significantly improve the mixing performance and energy efficiency of the equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of mixing equipment, and relates to a ribbon mixer. Background Technology

[0002] In industries such as chemical, food, and pharmaceutical, ribbon agitators are widely used for mixing high-viscosity materials. Traditional ribbon agitators typically employ simple ribbon-shaped helical blades, relying primarily on the blades to propel the material through overall circulation during mixing. However, this type of structure is prone to creating mixing dead zones, insufficient local shear force, low mixing efficiency, and high energy consumption when mixing high-viscosity or non-Newtonian fluids.

[0003] In addition, traditional spiral blades have a simple rectangular cross-section, which limits their ability to guide and shear fluids, making it difficult to achieve efficient and uniform mixing. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a ribbon agitator that optimizes the fluid dynamic field during operation, simultaneously achieving synergistic effects of macroscopic flow and microscopic shear, thereby significantly improving the mixing performance and energy efficiency of the equipment.

[0005] According to the technical solution of this utility model: a spiral ribbon mixer includes a stirring shaft, a support rod connected to the stirring shaft, and a spiral ribbon component connected to the support rod, characterized in that: the spiral ribbon component is provided with a turbulence structure for generating local eddies during stirring.

[0006] As a further improvement of this utility model, the turbulence structure is a flow guide groove formed on the surface of the spiral ribbon component.

[0007] As a further improvement of this utility model, the guide groove extends continuously or is distributed intermittently along the surface of the spiral belt component.

[0008] As a further improvement of this utility model, the intermittently distributed guide grooves are arranged in an array or staggered distribution on the surface of the spiral belt component.

[0009] As a further improvement of this utility model, the depth of the guide groove gradually changes from the near-axial end to the far-axial end of the spiral belt component.

[0010] As a further improvement of this utility model, the turbulence structure is a raised strip or turbulence hole fixed to the surface of the spiral ribbon component.

[0011] As a further improvement of this utility model, the number of the spiral ribbon components is at least one.

[0012] As a further improvement of this utility model, the number of spiral ribbon components is two, and the spiral directions of the two spiral ribbon components are the same.

[0013] As a further improvement of this utility model, the support rod is provided with multiple layers on the stirring shaft, and the spiral ribbon component is connected to the support rod of the first layer, and / or the bottom layer, and / or the middle layer from top to bottom.

[0014] As a further improvement of this utility model, the cross-sectional shape of the turbulence structure is one of the following: arc shape, triangle shape, trapezoid shape, rectangle shape, or a shape composed of a lower triangle and an upper rectangle.

[0015] The technical advantages of this invention are as follows: This invention has a reasonable and ingenious structure. During operation, the spiral blades drive the material to move, and the guide channel guides the fluid to form local turbulence, which enhances the mixing and shearing effect. It is especially suitable for the mixing process of high-viscosity and easily agglomerated materials. Attached Figure Description

[0016] Figure 1 This is the front view of the present invention.

[0017] Figure 2 for Figure 1 Top view.

[0018] Figure 3 for Figure 1 The left view.

[0019] Figure 4 This is a perspective view of the present invention.

[0020] Figure 5 This is a schematic diagram of the first cross-sectional shape of the guide channel.

[0021] Figure 6 This is a schematic diagram of the second cross-sectional shape of the guide channel.

[0022] Figure 7 This is a schematic diagram of the third cross-sectional shape of the guide channel.

[0023] Figure 8 This is a schematic diagram of the fourth cross-sectional shape of the guide channel.

[0024] Figure 9 This is a schematic diagram of the fifth cross-sectional shape of the guide channel. Detailed Implementation

[0025] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0027] Figure 1-9 The components include a stirring shaft 1, a support rod 2, a spiral blade 3, and a guide channel 3-1.

[0028] The core concept of this utility model is to set a turbulence structure on the spiral ribbon component of the ribbon mixer. Through this structure, local eddies are induced in the main circulating flow field, thereby simultaneously enhancing macroscopic mixing and microscopic shearing, effectively solving the problems of mixing dead angle, insufficient shear force and high energy consumption mentioned in the background technology.

[0029] Example 1: Double ribbon agitator with continuous guide grooves like Figure 1-9 As shown, this embodiment provides a typical double-ribbon agitator. It includes a stirring shaft 1, multiple layers of support rods 2, and two helical ribbon components (helical blades 3 in this embodiment). The support rods 2 are arranged in multiple layers at intervals along the axial direction of the stirring shaft 1, and each layer includes two support rods symmetrically arranged on both radial sides of the stirring shaft 1.

[0030] On the working surfaces of both helical blades 3, continuously extending guide grooves 3-1 are machined. These guide grooves 3-1 are arranged in parallel, and their extension direction is basically consistent with the generatrix direction of the helical blades 3. In this embodiment, the cross-sectional shape of the guide grooves 3-1 is arc-shaped. The two helical blades 3 have the same helical direction, both starting from the uppermost support rod and spiraling downwards to the bottom.

[0031] like Figure 1-9 As shown, the working principle of this invention is as follows: When the agitator rotates, the spiral blades 3 drive the high-viscosity material to undergo strong axial circulation, achieving macroscopic mixing. Simultaneously, the material flowing over the surface of the spiral blades 3 enters the guide channel 3-1, where it is guided and generates secondary flows and local eddies perpendicular to the main flow direction. These eddies significantly enhance the shearing action and interface renewal frequency between fluid micro-elements, effectively breaking up material agglomerates and solving the problem of weak local shearing force in traditional ribbon agitators. This results in more uniform mixing in a shorter time and with lower energy consumption.

[0032] Example 2: Ribbon Agitator with Intermittent Staggered Guide Grooves Based on Embodiment 1, this embodiment modifies the arrangement of the guide channels 3-1. The guide channels 3-1 are discontinuously distributed, meaning they are a series of short, discontinuous channels. Furthermore, these short channels are staggered on the surface of the spiral blade 3, meaning adjacent "rows" of guide channels are not on the same straight line.

[0033] This staggered distribution design can generate a more complex and irregular vortex field, further optimize the flow field structure, avoid new "streamlined" dead angles that may be generated by regular arrangement, and make the mixing more thorough and uniform.

[0034] Example 3: Variable Depth Guide Channel Ribbon Agitator This embodiment focuses on demonstrating the depth variation of the guide groove 3-1. The depth of the guide groove 3-1 gradually increases from the near-axial end (inner side) of the spiral blade 3 to the far-axial end (outer side).

[0035] The design consideration is that when the agitator rotates, the linear velocity on the outer side is much greater than that on the inner side, resulting in a stronger shearing capacity. By setting deeper guide channels on the outer side, stronger and larger-scale vortices can be generated in this high-energy region, thereby making fuller use of the agitation energy and maximizing energy efficiency.

[0036] Example 4: Ribbon agitator with raised turbulence structure This embodiment demonstrates another implementation of the turbulence structure. Unlike the embodiments described above, the turbulence structure in this embodiment is not a recessed guide channel, but rather raised strips welded to the surface of the helical blade 3. These raised strips can be continuous or discontinuous. When material flows past the raised strips, it is forcibly lifted and bypassed, thereby generating intense eddies and wakes behind the raised strips, which can also achieve the effect of enhancing local shearing and mixing.

[0037] Example 5: Implementation methods for single spiral ribbons and different connection positions This embodiment demonstrates the flexibility in the number and connection position of the helical ribbon components. There is one helical ribbon component. This single helical ribbon component can be connected to the bottommost support rod and extend upwards in a spiral pattern. This structure is suitable for applications with small mixing chambers or materials with specific properties.

[0038] In addition, the spiral ribbon component can also be connected to the struts of the middle layer, or, depending on the actual process requirements, to the struts of the top, bottom and middle layers at the same time to form a composite structure.

[0039] Based on any of the above embodiments, the connection method between the support rod 2 and the stirring shaft 1 can be further optimized, such as... Figure 1-4 As shown, radially symmetrical connecting rods 4 are welded to the surface of the stirring shaft 1. These connecting rods 4 are arranged regularly along the axial and circumferential directions of the stirring shaft 1, and their positions correspond one-to-one with the designed installation positions of each layer of support rods 2.

[0040] The inner end of the support rod 2 (i.e. the end closest to the stirring shaft 1) is provided with a first flange that mates with the second flange of the connecting rod 4. The first flange and the second flange are locked together by bolts and nuts, so that the support rod 2 can be firmly locked onto the stirring shaft 1.

[0041] The above embodiments are merely several specific implementations of this utility model and are not intended to limit the scope of protection of this utility model. Those skilled in the art should understand that: The turbulence structure is not limited to guide grooves and protrusions, but can also be other structures that can generate eddies, such as turbulence holes.

[0042] The cross-sectional shape of the guide channel can be any feasible shape, such as an arc, triangle, trapezoid, rectangle, or a combination thereof.

[0043] The specific structure of the spiral belt component can be a continuous ribbon blade, or other similar components that can achieve the spiral pushing function.

[0044] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A ribbon agitator, comprising a stirring shaft (1), a support rod (2) connected to the stirring shaft (1), and a spiral ribbon component connected to the support rod (2), characterized in that: The spiral ribbon component is provided with a turbulence structure for generating local eddies during stirring.

2. The ribbon agitator as described in claim 1, characterized in that: The turbulence structure is a flow guide groove (3-1) formed on the surface of the spiral ribbon component.

3. The ribbon agitator as described in claim 2, characterized in that: The guide groove (3-1) extends continuously or is distributed intermittently along the surface of the spiral ribbon component.

4. The ribbon agitator as described in claim 3, characterized in that: The intermittently distributed guide grooves (3-1) are arranged in an array or staggered distribution on the surface of the spiral ribbon component.

5. The ribbon agitator as described in claim 2, characterized in that: The depth of the guide groove (3-1) gradually changes from the near-axis end to the far-axis end of the spiral belt component.

6. The ribbon agitator as described in claim 1, characterized in that: The turbulence structure is a raised strip or turbulence hole fixed to the surface of the spiral ribbon component.

7. The ribbon agitator as described in claim 1, characterized in that: The number of the spiral ribbon components is at least one.

8. The ribbon agitator as described in claim 7, characterized in that: The number of spiral ribbon components is two, and the spiral directions of the two spiral ribbon components are the same.

9. The ribbon agitator as described in claim 1, characterized in that: The support rod (2) is provided with multiple layers on the stirring shaft (1), and the spiral ribbon component is connected to the support rod (2) from the top to the bottom layer, and / or the bottom layer, and / or the middle layer.

10. The ribbon agitator according to any one of claims 1-9, characterized in that: The cross-sectional shape of the disturbance structure is one of the following: arc-shaped, triangular, trapezoidal, rectangular, or a combination of a lower triangle and an upper rectangle.

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