A solid-liquid mixing agitator paddle

Abstract

The present invention belongs to the technical field of stirring equipment, and particularly relates to a solid-liquid mixing stirring paddle, which comprises a hub and at least two main blades. The main blades are obliquely installed on the circumferential surface of the hub by blade connecting blocks. The main blade comprises an upper side, a downwardly curved curved surface and a lower side plane. An auxiliary blade that is folded downward is provided on the outer side edge of the plane. In the present invention, the inclination angle and chord width of the curved surface part gradually change, so that the suction effect along the entire length of the blade is uniform and the best velocity effect is obtained at each point on the blade; the upper part of the main blade adopts a curved surface, so as to generate an efficient downward suction effect with the smallest driving force, and finally obtain a smooth movement of the fluid medium, reducing the energy consumption; the lower part area of the main blade is a plane, which is beneficial to the fixation of the main blade and the blade connecting block, and at the same time reduces the manufacturing cost; the use of the auxiliary blade strengthens the suction effect at the center of the blade, effectively eliminates the poor mixing in the center area at the bottom of the stirring, and prevents central deposition.

Description

Technical Field

[0001] The present invention belongs to the technical field of stirring equipment, and particularly relates to a solid-liquid mixing stirring paddle. Background Art

[0002] High efficiency of the stirring paddle has always been the goal pursued by the stirring industry. The stirring paddle is an important component of the stirring equipment. A good stirring paddle can greatly improve the stirring efficiency, shorten the reaction time, increase the yield of the finished product, and improve the product quality. However, in the prior art, it is often impossible to achieve both high efficiency and low energy consumption for the stirring paddle. Summary of the Invention

[0003] The present invention aims to provide a solid-liquid mixing stirring paddle, which ensures low energy consumption while guaranteeing the stirring efficiency.

[0004] According to the technical solution of the present invention, the solid-liquid mixing stirring paddle includes a hub and at least two main blades. The main blades are obliquely installed on the circumferential surface of the hub by blade connecting blocks. The main blade includes an upper side, a curved surface that bends downward, and a lower flat side. The outer side edge of the flat side is provided with an auxiliary blade that turns downward.

[0005] Further, the chord width of the curved surface gradually increases and then gradually decreases along the length direction of the main blade, and the inclination angle of the curved surface gradually decreases along the length direction of the main blade.

[0006] Further, the flat side extends from the inner end of the curved surface to the middle part, and the area of the flat side is 1 / 4 of the area of the main blade.

[0007] Further, the blade connecting block includes a first connecting plate connecting the inner end of the flat side and a second connecting plate perpendicular to the first connecting plate. The inner end faces of the first connecting plate and the second connecting plate are connected to the hub.

[0008] Further, the inclination angle at the connection between the inner end of the main blade and the hub is 45°.

[0009] Further, the curved surface is a cylindrical curved surface or a conical curved surface.

[0010] Further, the length of the auxiliary blade is 1 / 2 of the length of the lower side of the main blade.

[0011] Further, the included angle between the auxiliary blade and the end face of the hub is 45° - 90°.

[0012] The beneficial effects of the present invention are as follows:

[0013] The inclination angle and the chord width of the curved surface part of the main blade change along the length direction of the blade, so that the suction effect of the blade is uniform along the entire length and the best velocity effect is obtained at each point on the blade;

[0014] The upper region of the main blade is a cylindrical or conical curved surface, and the curved surface of the blade faces downward, so as to generate an efficient downward suction effect with the least driving force, ultimately obtaining a smooth movement of the fluid medium and reducing energy consumption;

[0015] The lower region of the main blade is a plane, which is beneficial to fixing the main blade and the blade connecting block, and at the same time reduces the manufacturing cost;

[0016] Auxiliary blades are provided on the main blade, and the included angle between the auxiliary blade and the end face of the hub is 45°-90°, which strengthens the suction effect at the center of the blade, effectively eliminates the poor mixing in the central region at the bottom of the stirring, and prevents central deposition. Brief Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the present invention.

[0018] Figure 2 is Figure 1 the top view of

[0019] Figure 3 It is an axonometric view of the present invention.

[0020] Description of the reference numerals: 1 - hub, 2 - blade connecting block, 3 - main blade, 3.1 - curved surface, 3.2 - plane, 4 - auxiliary blade. Detailed Description of the Invention

[0021] The present invention will be further described below in conjunction with specific embodiments and the drawings.

[0022] As shown in the figure: A solid-liquid mixing agitator is installed in the tank body, including a hub 1 and at least two main blades 3. An installation hole for connecting the stirring shaft is provided at the center of the hub 1. The ratio of the diameter of the agitator to the diameter of the tank is 0.25 - 0.75, and when the diameter ratio is 0.35 - 0.45, the best flow field is achieved. The main blade 3 is obliquely installed on the circumferential surface of the hub 1 by using the blade connecting block 2. In the illustrated embodiment, there are three main blades 3, which are evenly welded on the circumferential surface of the hub 1. The main blade 3 includes an upper side, a downwardly curved curved surface 3.1 and a lower side plane 3.2. The curved surface 3.1 can be a cylindrical or conical curved surface. Preferably, the arc length of the curved surface 3.1 is 0.4 - 0.6 times the overall diameter of the stirring paddle. An auxiliary blade 4 is provided on the outer side of the inner end of the plane 3.2 and is turned downward.

[0023] Specifically, the chord width of the curved surface 3.1 gradually increases and then decreases along the length direction of the main blade 3, and the inclination angle of the curved surface 3.1 gradually decreases along the length direction of the main blade 3, so that the suction effect of the blade along the entire length is uniform and the best velocity effect is obtained at each point on the blade. The plane 3.2 extends from the inner end of the curved surface 3.1 to the middle part. The area of the plane 3.2 is 1 / 4 of the area of the main blade 3, and the area of the curved surface 3.1 is 3 / 4 of the area of the main blade 3. The blade connection block 2 includes a first connection plate connecting the inner end of the plane 3.2 and a second connection plate perpendicular to the first connection plate. The inner end faces of the first connection plate and the second connection plate are connected to the hub 1. The blade connection block 2 is connected at the plane structure, which is convenient for welding and has a low manufacturing cost. The inclination angle at the connection between the inner end of the main blade 3 and the hub 1 is 45°, that is, the inclination angle between the inner end face of the plane 3.2 and the end face of the hub 1 is 45°. The length of the auxiliary blade 4 is 1 / 2 of the length of the lower side of the main blade 3, and the included angle between the auxiliary blade 4 and the end face of the hub 1 is 45° - 90°, which strengthens the suction effect at the center of the blade, effectively eliminates the poor mixing in the central area at the bottom of the stirring, and prevents central deposition. Preferably, the included angle is 90°.

[0024] The structure of the present invention is simple, with low manufacturing cost, good mixing effect, low energy consumption, and at the same time, it can avoid central deposition.

Claims

1. A solid-liquid mixing agitator paddle, comprising a hub (1) and at least two main blades (3), characterized in that, the main blades (3) are obliquely installed on the circumferential surface of the hub (1) by blade connection blocks (2), the main blades (3) include an upper side, a downwardly curved surface (3.1) and a lower side plane (3.2), and an auxiliary blade (4) that is folded downward is provided on the outer side edge of the plane (3.2); the chord width of the curved surface (3.1) gradually increases and then gradually decreases along the length direction of the main blade (3), and the inclination angle of the curved surface (3.1) gradually decreases along the length direction of the main blade (3); the curved surface (3.1) is a cylindrical curved surface or a conical curved surface; the length of the auxiliary blade (4) is 1 / 2 of the length of the lower side of the main blade (3); the included angle between the auxiliary blade (4) and the end face of the hub (1) is 45°-90°.

2. The solid-liquid mixing agitator paddle according to claim 1, characterized in that, the plane (3.2) extends from the inner end of the curved surface (3.1) to the middle, and the area of the plane (3.2) is 1 / 4 of the area of the main blade (3).

3. The solid-liquid mixing agitator paddle according to claim 1, characterized in that, the blade connection block (2) includes a first connection plate connecting the inner end of the plane (3.2) and a second connection plate perpendicular to the first connection plate, and the inner end faces of the first connection plate and the second connection plate are connected to the hub (1).

4. The solid-liquid mixing agitator paddle according to claim 1, characterized in that, the inclination angle at the connection between the inner end of the main blade (3) and the hub (1) is 45°.

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