JPH0377637A - Production of mixer - Google Patents

Abstract

PURPOSE:To perform effective mixing treatment by providing a stage for forming a stirring body element, a stage for forming a long-sized stirring body and a stage for connecting the stirring body to a vibration source. CONSTITUTION:A mixture of two or more kinds of fluid being an object to be mixed is introduced through an inflow port 12 and also passed through the inside of a casing 10 toward an outflow port 14. In this state, a stirring body 20 is vertically vibrated by a vibration source 30. Therein the fluid passed through the inside of the casing 10 is sufficiently mixed by contact with the vibrated stirring body 20. In the production of the stirring body 20, a stirring body element 200 is produced. The stirring body element 200 is constituted of a short-sized shaft part 222 and a spiral blade 224 fitted around the shaft part 222. The stirring body 20 is obtained by connecting a plurality of stirring body elements 200. Thereby effective mixing is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of manufacturing a mixing device for mixing fluids, and particularly to an improvement in the manufacturing process of a stirring body thereof.

[Prior Art] Conventionally, various types of mixing devices have been used in chemical reaction processes such as pH 1 adjustment and redox reactions. In addition, with the development of biotechnology in recent years,
The importance of stirring and mixing in biochemical fields such as microbial culture is also increasing.

Static mixers are widely used as devices for performing such liquid-liquid mixing and gas-liquid mixing. In this static mixer, stirring bodies of various shapes are arranged in a pipe through which fluids to be mixed flow, and the mixing of the fluids is promoted by the turbulent flow generated by the stirring bodies. For example, a pipe in which a stirrer made of a cut screw is placed inside the pipe is used.

Furthermore, a stirring body placed inside the pipe was attached to one Yuzu,
It has also been proposed to vibrate reciprocatingly to promote mixing, and the stirring body in such a mixing device has a spiral stirring blade, and a plurality of openings in this spiral blade are arranged in phase with the next stage. Those provided differently are known to have a high stirring and mixing effect.

This is because if such a stirring body is used, the fluid flowing from both the spiral passage formed by the spiral blades and the passage formed by the openings will flow between the spiral blades (each stage) in the axial direction of the stirring body. The mixing effect is enhanced by collision, and the area of the spiral blades existing in the axial direction becomes considerably large, and the probability that the fluid comes into contact with the surface of the spiral blades due to the axial vibration of the stirring body is greatly increased. This is thought to be because the mixing promotion effect caused by body vibration can be increased.

[Problems to be Solved by the Invention] As described above, a mixing device having a spiral blade having an opening can perform a very effective mixing process of fluids. However, the problem with spiral blades is that they are extremely difficult to manufacture.

That is, it is difficult to manufacture a stirring body having a spiral blade with an opening formed therein by molding, and it is even more difficult to form an opening in the spiral blade afterwards. Therefore, normally, after an opening is formed in a predetermined position, a spiral blade is manufactured, and then this is fixed to the shaft by welding or joining with an electron gun.

However, with this method, it takes a long time to fix the blade to the shaft, and since the spiral blade is basically one piece, it is difficult to form an opening in it, and it is difficult to securely fix the blade to the shaft. The problem was that it was difficult to do.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method for manufacturing a mixing device including a spiral blade, which is a simple manufacturing process.

[Means for Solving the Problems] A method for manufacturing a mixing device according to the present invention includes a short shaft, a tool attached around the shaft and having a starting end and a terminal end at a predetermined axial phase, and a plurality of A step of forming a stirrer element with a ribbon-shaped spiral blade having an opening, and a step of connecting a plurality of stirrer elements in a coaxial manner so that the beginning and end of the spiral blades are continuous, and forming a long stirrer element. The stirring body is housed in a cylindrical casing, and the stirring body is connected to a vibration source that vibrates in the axial direction of the stirring body.

[Operation] According to the present invention, first, a stirrer element having a short shaft portion and a spiral blade having a plurality of corresponding openings is formed. Then, by connecting these stirring body elements, a stirring body is formed. Therefore, the stirring body can be manufactured very easily.

The starting end and the ending end of the spiral blade in the stirrer element have different phases in the circumferential direction. Therefore, when the stirrer element is connected, the phase of the spiral blade can be automatically changed, and the phase of the opening formed here can also be changed.

Short-circuiting of the fluid flow through the openings in the mixing device can then be prevented.

E Example] Hereinafter, a method for manufacturing a mixing device according to the present invention will be described based on the drawings.

FIG. 1 is an overall configuration diagram showing the right half of the mixing device according to the present invention as a sectional view.

In the figure, a casing 10 is formed into a cylindrical shape, and its lower opening is an inlet 12. Further, an outflow port 14 is formed in the upper part of the casing 10,
The fluid that flows in from the inlet 12 passes through the casing 10 and is discharged from the outlet 14.

On the other hand, inside the casing 10, a stirring body 2° is inserted and arranged. This stirring body 2o consists of a shaft portion 22 and a spiral blade 24.

The shaft portion 22 extends upward from the casing 1o and is connected to the vibration source 30.

The vibration source 30 includes a pair of motors 40 and a cam mechanism 50 attached to an output shaft 42 of the motors 40.

The cam mechanism 50 includes a rotating part 52 to which the output shaft 42 is eccentrically attached, and a swinging part 54 that swings by the eccentric rotation of the rotating part 52. Therefore, the swinging section 5
4 is transmitted to the shaft portion 22 via the connecting portion 56 as vertical vibration.

Furthermore, the connecting portion 60 between the casing 10 and the vibration source 30 includes
Two diaphragms 62 and 64 are provided to prevent fluid flowing within the casing 10 from entering towards the vibration source 30.

Here, the two diaphragms 62 and 64 are connected by a vibration-like connecting member 40 so that they can move together over a certain range, and the upper diaphragm 64 is pushed downward by a predetermined pressure by a biasing member 72. is being energized towards. Therefore, even if the pressure inside the casing 10 increases to some extent, it can be counteracted by the biasing force of the biasing member 72.

The biasing member 72 includes a screw 74 and a spring 76, and the biasing force can be adjusted by moving the screw 74.

In the mixing device having such a configuration, when performing mixing, a mixture of two or more fluids to be mixed flows in from the inlet 12 and flows through the casing 10 toward the outlet 14. In this state, the stirring body 20 is vertically vibrated by the vibration source 30. Therefore, the fluid flowing inside the casing 10 is caused by the vibrating agitator 2
The mixture is thoroughly mixed by contact with 0.

Here, the characteristic feature of the present invention is that the stirring body 20 is composed of a plurality of stirring body elements, and this will be explained based on FIG. 2. Here, FIG. 2(A) is a front view, and FIG. 2(B) is a side view sectional view.

In manufacturing the stirring body 20, first, a predetermined stirring element 2 is prepared.
Manufacture 00.

The stirring element 200 includes a short shaft portion 222 and this shaft portion 222.
It consists of a spiral blade 224 attached around the periphery.

In this example, one phase (36
Spiral blade 224 of 315@min which is 45° short of 0°) min.
is installed.

This spiral blade 224 also has one opening 23 on the outer periphery.
0, half-sized openings 232a, b are provided at the starting end 224a and the ending end 224b. Furthermore, two openings 240 and 242 are provided on the inner circumference.

That is, as is clear from FIG. 2, the openings 240, 23 are spaced apart by 75° counterclockwise from the starting end 224a.
0,242, and the terminal end 224b is located 90" away from this frontage 242. Therefore, the starting end 224
The a terminal 224b is separated in phase by 45°.

In this way, since the spiral blade 222 has a length of 315 degrees, which is shorter than one phase, the work of forming the openings 230, 240, and 242 becomes very easy. That is, the stirrer element 200 can be easily manufactured by indie-excidine molding or the like.

In addition, an opening 230°240.24 is provided at a predetermined position of a donut-shaped disk having an opening corresponding to the shaft portion 222 in the center.
After removing the 2nd shape, a part of it was removed by 45°, and
Shift the cut end in a direction perpendicular to the disk surface and create a spiral blade 2
24 may be formed.

In this way, the opening 230 for the spiral blade 224
, 232 g, 232 b, 240.242 can be formed very easily.

A stirring body 20 is obtained by connecting a plurality of stirring body elements 200 obtained in this manner, and a convex portion 250 and a recessed portion 252 are formed at the end of the shaft portion 222 of the stirring body element. The convex portion 2501 and concave portion 252 are
It is formed to a corresponding size and its phase is 45″.
It's off. Therefore, when the stirring body elements 200 are stacked, each stirring body element 200 is connected with a phase shift of 45°. On the other hand, the starting end 224 of the spiral blade 224
Since the phases of a and the terminal end 224b are shifted by 45'',
End 2 of spiral blade 224 in one stirring element 200
24b is the starting end 224a of the stirring element 200 from the next stirring.
will be connected to.

Therefore, each opening 230 to 2 formed in the spiral blade 224
42 also has a different phase in each stirring element. Therefore, by manufacturing a large number of identical stirring elements and connecting them, it is possible to very easily produce a stirring body having spiral blades with openings having different phases.

Further, since openings 232a and 232b, which are half the size, are formed at the starting ends 224a and 224b of the spiral blade 224, respectively, when the stirrer element 200 is connected, an opening the same size as the opening 230 is formed at the connection part. 232 can be formed.

Note that the connection of the stirring body element 200 is simply that of the stirring body element 200.
0 may be laminated and bonded or welded, or as shown in FIG. 3, the stirring element 200 may be inserted into the shaft 300 and laminated.

According to such a method, the stirring body elements 200 can be stacked very efficiently. Alternatively, after the collar part 310 is provided at the lower end of the 111300 and the threaded part 320 is provided at the upper end, and the stirring element 200 is stacked, a bag nut is screwed into the threaded part 32G and the stirring element 200 is fixed by caulking. good.

When the stirring body 20 is formed in this way, a mixing device can be manufactured by housing it in a separately manufactured casing 10 and connecting it to the vibration source 30 and the like.

Further, in the above example, the spiral blade 224 has a 315°
Although the phase is shifted by 45@ with minutes as one unit, this angle may be set to any number of degrees, and one unit may be slightly larger than 360. Furthermore, one unit may be (36ON+Δ) minutes (here, N is an arbitrary integer, and Δ is an angle corresponding to the phase shift). In this way, the spiral blade 22
By making the phases of the starting and ending ends 224a and 4 of the stirrer 224 different with respect to the shaft portion 222, it is possible to easily obtain a stirring body 20 with different opening phases by connecting a large number of stirring body elements 200. Note that when one unit is made up of several phases, it is necessary to make the phases of a plurality of apertures in the unit different.

[Effects of the Invention] As explained above, according to the present invention, it is possible to efficiently manufacture a mixing device that has spiral blades in which openings serving as phase tools are sequentially formed and is capable of performing effective mixing. can.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional view showing the overall configuration of a mixing device manufactured according to the present invention, FIG. 2 is a configuration diagram showing the configuration of an agitator element 200, and FIG. 3 explains a method for manufacturing the agitator 20. FIG. lO... Casing 20... Stirring body 22,222... Shaft portion 24,224... Spiral blade 224a... Spiral blade starting end 224b... Spiral blade terminal end 30... Vibration source 200...・ Stirring element (A)

Claims (1)

[Claims] (1) A stirring element is formed by a short shaft and a ribbon-shaped spiral blade that is attached around the shaft and has a starting end and a terminal end that differ in axial phase by a predetermined angle and has multiple openings. a step of coaxially connecting a plurality of stirring body elements so that the beginning and end of their spiral blades are continuous to form a long stirring body; and housing the stirring body in a cylindrical casing. With,
A method for manufacturing a mixing device, comprising: connecting a stirring body to a vibration source that vibrates in the axial direction.