KR102326378B1 - Mixing device having impeller - Google Patents

Abstract

An agitator provided with an impeller is disclosed. An agitator provided an impeller according to an aspect of the present invention comprises an upper impeller coupled to an agitator shaft. The upper impeller comprises a hub coupled to the agitator shaft, and a plurality of impeller blades coupled at regular intervals around the hub and having the same shape. According to the present invention, an entire tank can be agitated uniformly.

Description

Agitator equipped with an impeller {MIXING DEVICE HAVING IMPELLER}

The present invention relates to an agitator having an impeller capable of effectively generating a downflow.

Among the water treatment processes, the stirring process is a unique combination of physical and chemical phenomena. In water treatment, it is an essential process to remove fine particulate matter as an important operation. This is a process for preventing and preventing aging sludge destruction.

There is a big difference in the quality of the treated water depending on what type of impeller is used in the water purification and sewage treatment process. In addition, the amount of energy consumed for rotating the impeller varies according to the structure of the impeller, and the difficulty of manufacturing the impeller is determined. Therefore, in order to obtain an optimal stirring effect, it is necessary to use an impeller having a shape suitable for the characteristics of the raw water to be treated.

On the other hand, when the size of the tank is large or the amount of raw water to be treated is large, a stirrer in which two or more impellers are combined on one rotating shaft is used. Republic of Korea Patent Registration No. 1819580 discloses a condenser having two impellers spaced apart from each other at regular intervals up and down. The coagulator described in the prior literature has a different shape of the upper impeller and the lower impeller, and while a vortex is formed by the lower impeller, the fine flocs float and move to the upper part, and the flocs are destroyed by the upper impeller. As such, the upper impeller described in the prior document causes the fluid flow in the vertical direction while crushing the floating flocs.

Although the stirrer described in the prior literature as described above is suitable for the purpose of pulverizing flocs, it has a problem in that it is difficult to uniformly stir the entire tank.

Therefore, the present invention has been derived to solve the above-described problems, and it is intended to provide a stirrer capable of uniformly stirring the entire tank by effectively inducing downflow.

Other objects of the present invention will become clearer through the examples described below.

A stirrer having an impeller according to an aspect of the present invention includes an upper impeller and a lower impeller coupled to the upper and lower portions of the stirrer shaft at regular intervals, and the upper impeller includes a hub coupled to the stirrer shaft, and around the hub It includes a plurality of impeller blades coupled at regular intervals and having the same shape, the impeller blades having a first blade coupled with an inclination angle to the hub, a second blade extending from the end of the first blade, and a second blade a third wing extending from the end of the wing and a fourth wing extending from the end of the third wing, the fourth wing is positioned higher than the third wing, and the third wing is positioned higher than the second wing, The second wing is positioned higher than the first wing, the bending angle of the first wing and the second wing is formed larger than the bending angle of the second wing and the third wing, and the bending angle of the second wing and the third wing is The third wing and the fourth wing are formed to be larger than the bending angle, the first wing has a first leading edge and a first trailing edge, and the first leading edge is formed shorter than the first trailing edge, The second wing has a second leading edge and a second trailing edge, the second leading edge is formed shorter than the second trailing edge, and the third wing has a third leading edge and a third trailing edge. and the third leading edge is formed longer than the third trailing edge, the fourth wing has a fourth leading edge and a fourth trailing edge, and the fourth leading edge is formed longer than the fourth trailing edge. and the first leading edge and the first trailing edge are bent in the rotational direction, the fourth leading edge is bent in the opposite direction of rotation, and the first wing and the second wing are connected by a straight first bent portion, The second wing and the third wing are connected by a second bent part of a straight line, the third wing and the fourth wing are connected by a third bent part of a straight line, and the length of the third bent part is greater than that of the second bent part. It is formed to be large, and the length of the second bent part is formed to be larger than the length of the first bent part.

The stirrer according to the present invention may have one or more of the following embodiments. For example, the lower impeller may have hydrofoil impeller blades.

According to the problem solving means of the present invention as described above, various effects including the following items can be expected. However, the present invention is not established only when all of the following effects are exhibited.

The present invention can provide a stirrer capable of effectively generating a downflow to uniformly stir the entire tank.

1 to 3 are views illustrating an upper impeller according to a first embodiment of the present invention.
4 is a view illustrating a stirrer according to a first embodiment of the present invention.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings, and in the description with reference to the accompanying drawings, the same or corresponding components are given the same reference numbers regardless of the reference numerals, and duplicates thereof A description will be omitted.

1 to 3 are views illustrating an upper impeller 100 according to a first embodiment of the present invention, and FIG. 4 is a view illustrating a stirrer 160 according to a first embodiment of the present invention.

For reference, the arrow in FIG. 2 indicates the rotation direction of the upper impeller 100 , and the arrow in FIG. 4 indicates the flow of fluid generated by the rotation of the agitator 160 .

1 to 4 , the upper impeller 100 according to the present invention is coupled to the upper portion of the lower impeller 162 in the agitator shaft 166 to induce a downflow. The upper impeller 100 is provided with four impeller blades 120 around the hub 110, the impeller blades 120 are disposed at an angle of 90 degrees and all have the same size and shape.

The hub 110 has a hollow cylindrical shape with both an upper end and a lower end open, and a rib 112 protruding outward is provided around the hub 110 . The rib 112 has a square plate shape and is disposed in the same direction and angle as the impeller blade 120 . And a bolt 114 for coupling with the impeller blade 120 is fastened to the rib 112 . The rib 112 may be formed on the outer circumferential surface of the hub 110 at an angle of 45 degrees in the longitudinal direction thereof.

The rib 112 may have a rectangular plate shape having a constant thickness, and the first wing 122 of the impeller wing 120 is coupled to the lower surface thereof.

The impeller blade 120 includes a first blade 122 , a second blade 130 , a third blade 138 and a fourth blade 146 each having different sizes and shapes.

The first wing 122 is coupled to the rib 112 by a bolt 114 . And the first wing 122 has a flat plate shape and has a first leading edge 124 and a first trailing edge 126 . Here, a plane in which the flat plate shape of the first wing 122 is positioned in space will be referred to as a first plane. That is, the first wing 122 is composed of a flat member parallel to the first plane. The first leading edge 124 corresponds to the front with respect to the rotation direction of the upper impeller 100 and the first trailing edge 126 corresponds to the rear. In addition, the first wing 122 is continuously formed with the second wing 130 by the first bent portion 128 .

The first leading edge 124 has a shape in which a middle portion in the longitudinal direction is bent in the rotation direction of the upper impeller 100 . In addition, the first trailing edge 126 also has a shape in which a middle portion in the longitudinal direction is bent in the rotation direction. In addition, the first trailing edge 126 is formed to be longer than the first leading edge 124 .

Since the first wing 122 has a planar shape, it may have an inclination angle of 45 degrees as in the rib 122 (see FIG. 3 ). Here, the inclination angle represents an angle formed with respect to the plane a of FIG. 3 .

The first bent part 128 is a connection part between the first wing 122 and the second wing 130 , and the second wing 130 is attached to the first wing 122 with respect to the first bent part 128 . It is bent downward at a certain angle with respect to (see FIG. 3). Accordingly, the second wing 130 has a smaller inclination angle than the first wing 122 .

The second wing 130 has a flat plate shape and has a second leading edge 132 and a second trailing edge 134 . Here, a plane in which the flat plate shape of the second wing 130 is located in the space will be referred to as a second plane. That is, the second wing 130 is composed of a flat member parallel to the second plane. 3 , the second plane is not parallel to the first plane. Both the second leading edge 132 and the second trailing edge 134 have a straight shape that is not bent, and the second leading edge 132 has a shorter length than the second trailing edge 134 . The second wing 130 is continuously formed at the end of the first wing 122 and is positioned higher than that of the first wing 122 .

A third wing 138 is continuously formed at an end of the second wing 130 , and a connection portion between the second wing 130 and the third wing 138 corresponds to the second bent portion 136 . The second bent portion 136 has a linear shape and is longer than the first bent portion 128 . And the second wing 130 and the third wing 138 are bent at a predetermined angle based on the second bent part 136 , and the angle of the bending is the first wing based on the first bent part 128 . (122) and formed smaller than the bent portion of the second wing (130).

The third wing 138 has a flat plate shape and has a third leading edge 140 and a third trailing edge 142 . Here, a plane in which the flat plate shape of the third wing 138 is positioned in space will be referred to as a third plane. That is, the third wing 138 is composed of a flat member parallel to the third plane. 3 , the third plane is not parallel to any of the first and second planes. Both the third leading edge 140 and the third trailing edge 142 have a straight shape that is not bent, and the third leading edge 140 is formed longer than the third trailing edge 142 . The third wing 138 is continuously formed at the end of the second wing 130 and is positioned higher than that of the second wing 130 .

A fourth wing 146 is continuously formed at an end of the third wing 138 , and a connection portion between the third wing 138 and the fourth wing 146 corresponds to the third bent portion 144 . The third bent portion 144 has a linear shape and is longer than the second bent portion 136 . And the third wing 138 and the fourth wing 146 are bent at a certain angle based on the third bent part 144 , and the angle of the bending is the second wing based on the second bent part 136 . (130) and the third blade 138 is formed smaller than the bent portion.

The fourth wing 146 has a flat plate shape and has a fourth leading edge 148 and a fourth trailing edge 150 . Here, a plane in which the flat plate shape of the fourth wing 146 is positioned in space will be referred to as a fourth plane. That is, the fourth wing 146 is composed of a flat member parallel to the fourth plane. 3 , the fourth plane is not parallel to any of the first to third planes. The fourth trailing edge 150 has a straight shape that is not bent, and the fourth leading edge 148 is longer than the fourth trailing edge 142 . In addition, the fourth wing 146 is positioned higher than the third wing 138 .

The fourth leading edge 148 is bent in a direction opposite to the rotation, and the bending point is formed adjacent to the third bent portion 144 compared to the end of the fourth wing 146 .

The impeller blade 120 having the configuration as described above forms a downward flow that moves the fluid to the lower portion by rotation.

5, the stirrer 160 according to the first embodiment of the present invention is inserted into the tank 168 to stir the fluid, and the upper impeller 100 and the lower impeller 162 are the stirrer shafts ( 166) has a structure combined with a certain interval on the top and bottom. The upper impeller 100 forms a downward flow that draws the surrounding fluid and moves it in the direction of the lower impeller 162 positioned below the upper impeller 100 . And the lower impeller 162 stirs the fluid moving downward by the upper impeller 100 so that it moves in the lateral direction and upward. A smooth fluid flow can be formed in the tank 168 by the upper impeller 100 and the lower impeller 162 as described above.

The lower impeller 162 may correspond to an impeller having a hydrofoil shape.

The stirrer 160 according to this embodiment is provided with the upper impeller 100 having the shape illustrated in FIGS. 1 to 4 to form a downflow, thereby forming a smooth fluid flow inside the tank 168 even with a small power requirement. can do.

Although the above has been described with reference to one embodiment of the present invention, those of ordinary skill in the art can variously change the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below. It will be appreciated that modifications and variations are possible.

100: upper impeller
120: impeller wing
160: agitator
162: lower impeller

Claims (2)

Including an upper impeller coupled to the agitator shaft,
The upper impeller includes a hub coupled to the agitator shaft, and a plurality of impeller blades coupled at regular intervals around the hub and having the same shape,
The impeller blade includes a first wing coupled to the hub at an inclination angle and composed of a flat member parallel to a first plane, and a second wing extending from an end of the first wing and composed of a flat member parallel to a second plane. and a third wing extending from an end of the second wing and comprising a flat member parallel to a third plane, and a fourth wing extending from an end of the third wing and comprising a flat member parallel to a fourth plane do,
The fourth wing is positioned higher than the third wing, the third wing is positioned higher than the second wing, and the second wing is positioned higher than the first wing,
The first wing and the second wing are connected by a first bent part of a straight line, the second wing and the third wing are connected by a second bent part of a straight line, and the third wing and the fourth wing are connected by a straight second bent part The wings are connected by a straight third bend,
The bending angle between the first wing and the second wing is formed to be larger than the bending angle between the second wing and the third wing, and the bending angle between the second wing and the third wing is the third Is formed larger than the bending angle between the blade and the fourth blade, the angle formed by the first blade with respect to the plane (a) orthogonal to the shaft of the stirrer is greater than the angle formed by the second blade, and the second blade is The angle formed by the third wing is greater than the angle formed by the third wing is formed larger than the angle formed by the fourth wing,
The first wing has a first leading edge and a first trailing edge, wherein the first leading edge is formed shorter than the first trailing edge,
The second wing has a second leading edge and a second trailing edge, and the second leading edge is formed shorter than the second trailing edge,
The third wing has a third leading edge and a third trailing edge, the third leading edge is formed longer than the third trailing edge,
The fourth wing has a fourth leading edge and a fourth trailing edge, and the fourth leading edge is formed longer than the fourth trailing edge,
The first leading edge and the first trailing edge are bent in a direction of rotation so that the first wing forms a concave hexagon on one plane, and the fourth leading edge is bent in a direction opposite to the rotation so that the fourth wing is to form a convex pentagon on one plane,
The length of the third bent part is formed to be larger than the second bent part, and the length of the second bent part is formed to be larger than the length of the first bent part,
The angle of the first bent portion with respect to the second leading edge in the second plane is formed to be greater than the angle of the second bent portion with respect to the third leading edge in the third plane, and the third angle in the third plane The agitator having an impeller in which the angle of the second bent portion with respect to the leading edge is smaller than the angle of the third bent portion with respect to the fourth leading edge in the fourth plane. According to claim 1,
Agitator having an impeller, characterized in that the upper impeller is configured alone or is provided with a multi-stage axial or radial flow lower impeller at the lower portion.

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