Linear helical frame stirrer

Abstract

The utility model belongs to the technical field of mixed stirring equipment relates to a linear spiral frame type stirrer, the stirring frame includes the horizontal paddle of installation in the lower end of stirring shaft, the top of horizontal paddle is provided at least one layer of inclined paddle, the both corresponding ends of horizontal paddle and inclined paddle are connected through a flexible connecting piece respectively, and the stirring frame is formed by surrounding horizontal paddle, inclined paddle and two connecting pieces, the connecting piece is one of spring, elastic rubber rod, the inclined paddle includes two half split inclined paddles that are separately arranged in the radial two sides of stirring shaft, the half split inclined paddle has an oblique setting working face and first clasp that is integrally connected in one end of working face, and two half split inclined paddles are fixedly connected to stirring shaft through first clasp. The stirrer combines the wide wall scraping range of frame type stirring with the strong axial conveying capacity of spiral blade, realizes the efficient, dead angle free, low energy consumption mixing to medium high viscosity fluid.

Description

Technical Field

[0001] This utility model belongs to the technical field of mixing and stirring equipment, and relates to a linear spiral frame stirrer. Background Technology

[0002] In industries such as chemical, food, pharmaceutical, and environmental protection, mixing equipment is a key device for material mixing, reaction, mass transfer, and heat transfer. For medium- to high-viscosity fluids or non-Newtonian fluids, traditional radial flow agitators (such as straight-blade turbines) or axial flow agitators (such as propellers) often suffer from problems such as low mixing efficiency, the easy formation of mixing dead zones, and high energy consumption.

[0003] While existing frame-type agitators can stir materials close to the vessel wall and reduce dead zones, they are typically based on a simple frame structure, resulting in weak axial circulation and driving force for materials, and there is still room for improvement in overall mixing efficiency. On the other hand, simple spiral ribbon agitators can promote axial flow, but their stirring effect in the near-axial region is limited, and their structural rigidity is sometimes insufficient.

[0004] Therefore, there is an urgent need for a new type of mixer that combines the wall-scraping characteristics of a frame mixer with the strong axial conveying capacity of a spiral blade, while also possessing better structural rigidity and mixing efficiency. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a linear spiral frame mixer that organically combines the wide wall-scraping range of frame mixing with the strong axial conveying capacity of spiral blades, achieving efficient, dead-angle-free, and low-energy-consumption mixing of medium-to-high viscosity fluids.

[0006] According to the technical solution of this utility model: a linear spiral frame stirrer includes a stirring shaft and a stirring frame driven by the stirring shaft, characterized in that: the stirring frame includes a horizontal blade installed at the lower end of the stirring shaft, and at least one layer of inclined blades is arranged above the horizontal blades, and the corresponding ends of the horizontal blades and the inclined blades are respectively connected by a flexible connector, and the horizontal blades, the inclined blades and the two connectors surround to form a stirring frame.

[0007] As a further improvement of this utility model, the connecting member is one of a spring or an elastic rubber rod.

[0008] As a further improvement of this utility model, the inclined blade includes two semi-sloping blades placed on both sides of the stirring shaft in the radial direction. Each semi-sloping blade has an inclined working surface and a first clamp integrally connected to one end of the working surface. The two semi-sloping blades are fixedly connected to the stirring shaft by the first clamp.

[0009] As a further improvement of this utility model, the inclination angle of the working surface is 30°-60° relative to the axis of the stirring shaft.

[0010] As a further improvement of this utility model, a positioning rod component is detachably connected to the other end of the working surface, and the positioning rod component is fixedly connected to one end of the connecting member.

[0011] As a further improvement of this utility model, the vertical plate of the horizontal blade is arranged parallel to the axis of the stirring shaft, and the connecting rod fixed at the outer end of the horizontal blade is fixedly connected to the other end of the connecting member.

[0012] As a further improvement of this utility model, the horizontal blade includes two half-sectioned horizontal blades placed on both sides of the stirring shaft in the radial direction. The half-sectioned horizontal blades also include a horizontal plate that is perpendicular to the vertical plate and integrally connected to it.

[0013] As a further improvement of this utility model, one end of the semi-sectioned blade is provided with an integrally connected second clamp, and the other end of the semi-sectioned blade is provided with an upwardly bent portion, and the connecting rod is fixedly connected to the upper end of the bent portion.

[0014] As a further improvement of this utility model, the stirring shaft is provided with two or more layers of inclined blades.

[0015] As a further improvement of this utility model, the outer edge of the horizontal blade and / or the oblique blade is provided with a detachable scraper.

[0016] The technical advantages of this invention are as follows: This invention addresses the shortcomings of existing technologies by combining radial shearing and forced directional axial circulation, enabling the entire material in the reactor to quickly reach a uniform state in three-dimensional space, significantly shortening the mixing time. The linear spiral outer frame blades (springs) are tightly attached to the reactor wall, effectively eliminating dead zones in mixing and heat transfer near the wall, making it particularly suitable for materials that are prone to deposition and have high viscosity. Continuous wall scraping action disrupts the stagnant boundary layer on the wall, greatly enhancing the heat transfer effect of the reactor wall, making it suitable for chemical reaction processes requiring strict temperature control. By optimizing the flow field structure, it requires lower speed and less power than traditional agitators to achieve the same mixing effect, resulting in significant energy savings. The external spiral frame and internal blade structure form a stable frame support through clamps and connecting rods, providing high overall rigidity and smooth operation, making it suitable for large-scale mixing equipment. Attached Figure Description

[0017] Figure 1 This is the front view of the present invention.

[0018] Figure 2 for Figure 1 Top view.

[0019] Figure 3 for Figure 1 The left view.

[0020] Figure 4This is a perspective view of the present invention. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0022] 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.

[0023] Figure 1-4 The components include a stirring shaft 1, a first clamp 2, an inclined blade 3, a half-section inclined blade 3-1, a working surface 3-11, a positioning rod component 3-12, a flexible connector 4, a horizontal blade 5, a connecting rod 5-1, a half-section horizontal blade 5-2, a vertical plate 5-21, a horizontal plate 5-22, a second clamp 5-23, etc.

[0024] like Figure 1-4 As shown in this embodiment, the present invention provides a linear spiral frame stirrer suitable for mixing medium-to-high viscosity fluids. Its core lies in transforming a basic frame structure into a dynamic stirring frame that can adapt to the inner wall of the vessel and simultaneously stimulate strong axial circulation through flexible connectors.

[0025] Two semi-slanted blades 3-1 are symmetrically fixed to the stirring shaft 1 by the first clamp 2. The working surface 3-11 of the semi-slanted blades 3-1 forms an inclination angle of 45° with the axis of the stirring shaft 1 (preferred within the range of 30°-60° in this invention), which is key to generating strong axial thrust. At the outer end of the working surface 3-11, a positioning rod component 3-12 is detachably installed by bolts.

[0026] The two semi-splitter blades 5-2 are symmetrically fixed to the bottom end of the stirring shaft 1 by the second clamp 5-23. The semi-splitter blades 5-2 are composed of a vertical plate 5-21 and a horizontal plate 5-22, and their outer ends are bent upward and fixed with a connecting rod 5-1.

[0027] The frame is closed using two flexible connectors 4 (in this embodiment, metal springs covered with food-grade PVC sheaths). One end of the spring is connected to the positioning rod component 3-12 of the inclined blade, and the other end is connected to the connecting rod 5-1 of the horizontal blade. Thus, the horizontal blade 5, the inclined blade 3, and the two springs 4 together form a complete, elastic stirring frame. The connectors 4 can also be elastic rubber rods.

[0028] like Figure 1-4 As shown, the working process and principle of this utility model are as follows: when the stirring shaft 1 is driven to rotate by the driving device, the entire stirring frame rotates accordingly.

[0029] The inclined working surface 3-11 generates a continuous axial force on the material when rotating, like a discontinuous spiral surface, conveying the material from the bottom of the vessel upwards or from the top of the vessel downwards (the conveying direction depends on the combination of the rotation direction of the stirring shaft and the orientation of the inclined surface), thereby forming a strong axial main circulation in the vessel, effectively solving the problem of weak axial flow in traditional frame agitators.

[0030] Due to the presence of the flexible connector 4, the stirring frame can deform slightly under centrifugal force, allowing the outer edges of the horizontal blade 5 and the inclined blade 3 (preferably equipped with PTFE scrapers) to always rotate in contact with the vessel wall, continuously scraping away the stagnant material layer on the wall surface. This not only eliminates mixing dead zones but also greatly improves the heat transfer efficiency of the jacket.

[0031] Despite the use of flexible connectors, the "horizontal blade-spring-slanted blade" structure forms a stable structure, and is fixed to the stirring shaft by upper and lower clamps, ensuring the smooth operation of the overall frame when subjected to the torque of high-viscosity materials.

[0032] To further improve mixing efficiency, two layers of inclined blades 3 can be installed on the stirring shaft 1, with the upper and lower layers spiraling in opposite directions. In this way, one layer pushes the material upward and the other layer pushes the material downward, which can create more intense vertical convection in the vessel and achieve better mixing effect.

[0033] 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 linear spiral frame stirrer, comprising a stirring shaft (1) and a stirring frame driven by said stirring shaft (1), characterized in that: The stirring frame includes a horizontal blade (5) installed at the lower end of the stirring shaft (1), and at least one layer of oblique blades (3) is arranged above the horizontal blade (5). The corresponding ends of the horizontal blade (5) and the oblique blades (3) are connected by a flexible connector (4). The horizontal blade (5), the oblique blades (3) and the two connectors (4) surround each other to form a stirring frame.

2. The linear spiral frame stirrer as described in claim 1, characterized in that: The connector (4) is one of a spring or an elastic rubber rod.

3. The linear spiral frame stirrer as described in claim 1, characterized in that: The inclined blade (3) includes two semi-slit inclined blades (3-1) placed on both sides of the stirring shaft (1) in the radial direction. The semi-slit inclined blade (3-1) has an inclined working surface (3-11) and a first clamp (2) integrally connected to one end of the working surface (3-11). The two semi-slit inclined blades (3-1) are fixedly connected to the stirring shaft (1) by the first clamp (2).

4. The linear spiral frame stirrer as described in claim 3, characterized in that: The tilt angle of the working surface (3-11) relative to the axis of the stirring shaft (1) is 30°-60°.

5. The linear spiral frame stirrer as described in claim 3, characterized in that: The other end of the working surface (3-11) is detachably connected to a positioning rod component (3-12), which is fixedly connected to one end of the connector (4).

6. The linear spiral frame stirrer as described in claim 1, characterized in that: The vertical plate (5-21) of the horizontal blade (5) is arranged parallel to the axis of the stirring shaft (1), and the connecting rod (5-1) fixed at the outer end of the horizontal blade (5) is fixedly connected to the other end of the connecting piece (4).

7. The linear spiral frame stirrer as described in claim 6, characterized in that: The horizontal blade (5) includes two half-section horizontal blades (5-2) placed on the radial sides of the stirring shaft (1). The half-section horizontal blades (5-2) also include a horizontal plate (5-22) that is perpendicular to and integrally connected to the vertical plate (5-21).

8. The linear spiral frame stirrer as described in claim 7, characterized in that: One end of the semi-splitter blade (5-2) is constructed with an integrally connected second clamp (5-23), and the other end of the semi-splitter blade (5-2) is constructed with an upwardly bent portion, and the connecting rod (5-1) is fixedly connected to the upper end of the bent portion.

9. The linear spiral frame stirrer as described in claim 1, characterized in that: The stirring shaft (1) is provided with two or more layers of inclined blades (3).

10. The linear spiral frame stirrer as described in claim 1, characterized in that: The outer edges of the horizontal blade (5) and / or the oblique blade (3) are provided with removable scrapers.

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