CN1167496C - bowl mixer - Google Patents

Abstract

The present invention relates to a high-efficiency bowl stirring apparatus which comprises a stirring shaft, a shaft sleeve of the stirring shaft and at least one blade arranged on the shaft sleeve of the stirring shaft. The high-efficiency bowl stirring apparatus is characterized in that the blade presents in a conic structure and comprises a circular disk fixedly arranged on the shaft sleeve, the circular disk is provided with a plurality of liquid flow holes, at least two blade lobes are arranged under the circular disk, and the blade lobes are formed by downward vertically extending along the lower side surface of the circular disk. Because the present invention can generate various forms of liquid flow comprising axial flow and can also combine the blades for use, and the present invention causes liquid in a container to generate turbulent flow and intensifies mixing effect, various materials can be thoroughly mixed and stirred. The present invention is very practical.

Description

bowl mixer

The invention relates to a mixer, in particular to a high-efficiency bowl mixer with high mixing efficiency.

The agitator is generally installed in the agitator, and together with the agitation container completes chemical reactions such as dispersion, emulsification, mixing, dissolution, absorption, extraction, and heat transfer, so the agitator is widely used in chemical industry, daily chemical industry, food and other industries.

In a mixing vessel, the liquid in the vessel is made to flow by the operation of the agitator. According to the type of liquid flow, it can be divided into three main types: first, tangential flow type, which means that the direction of liquid flow in the container is parallel to the direction of blade movement; second, radial flow type, The radial flow pattern is due to the action of centrifugal force, the liquid is discharged from the blades to form a radial liquid flow; third, the axial flow pattern, the axial flow pattern refers to the liquid flow direction parallel to the rotation axis.

Among the above three types of liquid flow, axial flow is a more important and effective flow pattern, and it is a preferred flow pattern with high mixing efficiency in the cosmetics and cleaning products industry. However, in the actual production process, the liquid flow pattern produced in any agitator is expected to be a combination of the three flow patterns, because in different situations, the contributions of various flow patterns are different. In any mixing equipment, even in any kind of agitator, the flow pattern is expected to be a combination of three flow patterns, and in any mixing equipment, the liquid flow pattern formed when stirring and mixing has nothing to do with the mixing vessel The size and shape of the mixer, as well as the speed, shape and type of the blades and mixing devices used are closely related.

The prior art stirrer (see also shown in Fig. 3) usually is made up of stirring shaft 1 and the blade 2 that is positioned on the stirring shaft 1, and the stirrer is driven to rotate by motor in the mixing container 3, and paddle 2 just will be positioned at mixing originally. The powder on the upper part of container 3 is brought down and mixed with other materials to form a uniform liquid. However, in the actual production process, there is still a phenomenon of uneven stirring. The reasons are:

1. The liquid does not produce axial flow.

Because its paddle 2 of prior art agitator is paddle type structure, so this paddle 2 makes the flow of liquid only produce the flow of vortex form with the rotation of electric motor, does not produce the flow of axial flow, so the material in mixing container 3 stirs uneven;

2. The location of the agitator is difficult to fit.

Because the paddle 2 of the prior art agitator is a paddle structure, it is difficult to form complete mixing and stirring in the mixing container 3, so when the paddle 2 is at the upper position in the mixing container 3, for high viscosity, high specific gravity materials or Liquid can only produce laminar flow, and mixing is difficult; and therefore when the paddle 2 is at the lower position in the mixing container 3, for powder or flocculent floating materials with lighter specific gravity, it is difficult for the agitator to remove the floating material floating on the upper layer of the liquid. The material or liquid is brought down for mixing and stirring, so it cannot complete the real mixing and stirring work.

The object of the present invention is to provide an improved bowl mixer which can fully mix and stir the materials in the mixing container.

The purpose of the present invention is achieved like this:

A bowl type agitator comprises a stirring shaft and its sleeve, and at least one paddle arranged on the stirring shaft sleeve; its characteristics are:

The paddle includes a disc fixed on the shaft sleeve; a plurality of liquid flow holes are arranged on the disc; at least two paddles are arranged under the disc, and the paddles are arranged along the circular The lower side of the disc is formed by vertically extending downward.

In the above-mentioned bowl mixer, wherein, the inner end of the paddle is fixedly connected to the side wall of the shaft sleeve.

In the above-mentioned bowl agitator, wherein, the paddle is in a conical structure, and the angle α between the paddle flap and the side wall of the stirring shaft sleeve is in the range of 45° to 75°.

In the above-mentioned bowl mixer, wherein, the optimal angle α between the paddle vane and the side wall of the stirring shaft sleeve is 60°.

In the above bowl mixer, wherein, the liquid flow hole is a circular through hole with a certain size.

In the above-mentioned bowl mixer, one paddle is respectively arranged at appropriate positions above and below the stirring shaft.

In the above-mentioned bowl mixer, wherein, the two paddles are arranged in the form of a structure in which the conical surfaces are upward and downward respectively.

Compared with the prior art, the bowl mixer of the present invention has the following advantages and positive effects due to the adoption of the above-mentioned technical scheme:

1. The liquid can generate axial flow in the container.

In the present invention, because the paddles are conical, the height of the blades is deep inside and shallow outside. When the paddles rotate with the stirring shaft, the liquid in the container is thrown outward and upward due to the centrifugal force, and a partial The vacuum sucks the liquid downward from the liquid flow hole of the disc, and the liquid flow moves axially along with it, and makes the liquid flow from top to bottom to the inner wall of the container and then flows back upwards, forming a complete axial flow.

2. The location of the agitator can be arranged according to special circumstances.

In the present invention, if the paddles are installed in the opposite direction, completely opposite liquid flow patterns can be formed. Therefore, according to different situations, paddles with conical surfaces facing each other can be arranged at the appropriate position of the stirring shaft, so that containers with special conditions can be mixed with materials. Get well mixed and stirred.

The purpose, specific structural features and advantages of the present invention can be further understood through the following description of an embodiment of the bowl mixer of the present invention in conjunction with the accompanying drawings. Among them, the attached figure is:

Fig. 1 is the overall structural representation of the bowl mixer proposed according to the present invention;

Fig. 2 is a schematic structural view of the paddle part in the bowl mixer of the present invention;

Fig. 3 is a structural schematic diagram of a stirrer in the prior art.

As shown in Figure 1, this is a schematic diagram of the overall structure of the bowl mixer of the present invention. The present invention consists of a stirring shaft 10 and a paddle 20 arranged on the stirring shaft 10, a shaft sleeve 11 is arranged on the stirring shaft 10, and the paddle 20 is arranged on the stirring shaft 10 by being connected with the shaft sleeve 11 .

As shown in FIG. 2 , this is a structural schematic diagram of the paddle part in the bowl mixer of the present invention. The paddle 20 is composed of a disc 21 and a paddle lobe 23 fixedly arranged under the disc 21 . in,

The disc 21 is sleeved outside the shaft sleeve 11 of the stirring shaft 10, and is tightly fixedly combined with the outer wall of the shaft sleeve 11; the disc 21 is provided with a plurality of liquid flow holes 22, and the liquid flow holes 22 can be In various forms, in the present invention, what the liquid flow hole adopted is a circular through hole with a certain size, in order to provide a channel for the unobstructed flow of the upper liquid in the container;

The paddle 23 is arranged under the disk 21, and the paddle 23 is formed by extending vertically downward along the lower side 211 of the disk 21. Fixedly connected together, therefore, disc 21 and paddle petal 23 and the shaft sleeve 11 outside stirring shaft 10 can be integrally formed, and in the present invention, disc 21 and paddle petal 23 are all connected with stirring shaft 10 by welding The shaft sleeves 11 are connected together; the paddle petals 23 can be regular rectangles or irregular rectangles. In the present invention, the paddle petals 23 adopt a trapezoidal shape, that is, the paddle petals 23 and the stirring shaft 10 shaft sleeve 11 The angle α between the side walls is less than 90°, generally in the range of 45° to 75°, preferably around 60°, so that the entire blade 20 has a conical structure; And, paddle leaf 23 is provided with at least two petals, and in actual use, how many petals of paddle petal 23 and how many liquid flow holes 22 are arranged are determined according to the size of stirring container and stirrer, and under normal circumstances, paddle The number of vanes 23 is basically the same as the number of liquid flow holes 22, thereby forming an effective liquid flow pattern in the container.

In special cases, such as the liquid mixing container is relatively large, or there are many types of materials and the specific gravity of each material is not the same, in order to safely mix and stir the materials in the container, it can be adjusted at the appropriate position above and below the stirring shaft 10. One paddle 20 is arranged at each place, and the two paddles 20 can be arranged in a structure with conical surfaces going up and down respectively, so that the containers and materials under special conditions can be fully mixed and stirred.

The invention works like this:

When the motor drives the stirring shaft 10 to rotate, the paddle 20 on the shaft sleeve 11 of the stirring shaft 10 also rotates thereupon. 20 is in the shape of a cone, and its height is deep inside and shallow outside. The paddle petal 23 causes the liquid to be thrown outward and upward under the action of centrifugal force, and a partial vacuum is formed at the center of the container and the position of the paddle petal 23. At this time, the disc The liquid flow hole 22 on the 21 will have a liquid flow suction, and the liquid flow will move axially after passing through the liquid flow hole 22, so that the liquid flow will flow from top to bottom to the inner wall of the container and then return upward; when the rotational speed changes, the liquid flow will Streams will also be different.

However, when the paddle 20 is installed backwards (that is, the paddle lobe 23 is upward), a completely opposite flow pattern to the above-mentioned liquid flow can be obtained at this time, at this time, the liquid will splash and then generate a vortex.

And when two paddles 20 are arranged on the same stirring shaft 10 and used in combination at the same time, the tapered surfaces of the two paddles 20 can be arranged upwards and downwards respectively, that is, the paddle petals 23 of the upper paddle 20 are arranged downwards. , and the paddle petals 23 of the lower paddle 20 are set upward, at this time, a variety of liquid flow patterns can be produced, which makes the stirring and mixing effect better, so that various materials with different specific gravity can be easily and easily mixed in a large container Get well mixed and stirred.

In summary, the bowl agitator of the present invention conforms to the principles of engineering mechanics and fluid mechanics, so that the liquid can generate various types of liquid flow including axial flow in the container, so even for high viscosity, high specific gravity The liquid can not only produce laminar flow, but also can easily and easily achieve uniform mixing; at the same time, because of its special structure, it can easily strengthen the mixing effect in the container, so that the container with special conditions can be combined with The material is fully mixed and stirred, so it is very practical.

Claims (7)

1. A bowl type stirrer comprises a stirring shaft (10), a shaft sleeve (11) of the stirring shaft, and at least one blade (20) arranged on the shaft sleeve (11) of the stirring shaft (10); the method is characterized in that:

the paddle (20) comprises a disc (21) fixedly arranged on the shaft sleeve (11); a plurality of liquid flow holes (22) are arranged on the disc (21); at least two blades (23) are arranged below the disc (21), and the blades (23) are formed by extending downwards and vertically along the lower side surface (211) of the disc (21).

2. The bowl mixer of claim 1 wherein: the inner side end of the paddle (22) is fixedly connected with the side wall of the shaft sleeve (11).

3. The bowl mixer according to claim 1 or 2, wherein: the paddle (20) is in a conical structure, and the included angle alpha between the paddle blade (23) and the side wall of the shaft sleeve (11) of the stirring shaft (10) ranges from 45 degrees to 75 degrees.

4. The bowl mixer of claim 3 wherein: the optimal angle of an included angle alpha between the paddle blade (23) and the side wall of the shaft sleeve (11) of the stirring shaft (10) is 60 degrees.

5. The bowl mixer of claim 1 wherein: the liquid flow hole (22) is a circular through hole with a certain size.

6. The bowl mixer of claim 1 wherein: the upper and lower proper positions of the stirring shaft (10) are respectively provided with a blade (20).

7. The bowl mixer of claim 6, wherein: the two blades (20) are arranged in a structural form that conical surfaces respectively face upwards and downwards.

Images