JPH0325214B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a mixer device, in particular, a conduit in which the stirring blades are basically stationary, and when the fluid to be mixed flows, the fluid is moved by each stirring blade. The present invention relates to an improvement of a static stirring type mixer device that performs a desired stirring action while repeating division and merging.

[Prior Art] Uniform stirring and mixing of multiple types of fluids, mainly liquids, gases, and powders, is extremely important in various industrial fields, especially in chemical processing and food processing. A mixer device that provides uniform mixing is desired.

Generally, mixing is carried out by driving stirring blades in a mixing tank with a motor, etc., but conventional methods also do not require any driving source and simply follow the flow of the fluid to be mixed naturally. A stationary stirring type mixer device is well known, in which a large number of stirring blades are arranged in a conduit that guides the fluid to be mixed, and division and merging are repeated in sequence according to the flow of the fluid, and even if it is a short conduit. It also provides an efficient mixing effect and has been put into practical use in various fields.

[Problems to be Solved by the Invention] The above-mentioned static stirring mixer device has the advantage of not requiring any driving source and can provide a mixing action that is sufficiently efficient for practical use. In order to mix various types of paints in the food industry or in the fine chemical industry, there have been cases where conventional static mixing mixers have not been able to provide a sufficiently satisfactory effect in order to achieve a more uniform and finer particle size mixture than before. .

On the other hand, stirring blades driven by motors have the problem of imparting large kinetic energy to the fluid to be mixed, which adversely affects its chemical properties. A new mixer device that solves all the problems was desired.

The present invention was made in view of the above-mentioned conventional problems, and its purpose is to improve the mixing characteristics of a static mixer device and to provide an improved static mixer that can efficiently perform uniform stirring of fine particles. The purpose of the present invention is to provide a mold mixer device.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a conduit for guiding fluids to be mixed, a stirring body provided in the conduit and having a plurality of stirring blades, and a conduit or stirring body. a vibration source that provides two or more different types of fibrillating motions in accordance with electrical input signals, the stirring body is fibrillated in a composite mode within the conduit to promote the stirring action of the fluid to be mixed. Features.

In the present invention, the compound fibrillation motion can be selected in various ways depending on the properties of the fluid to be mixed, and the fibrillation frequency and mode can be set appropriately. According to the above, the conduit and the stirring blade itself are basically static stirring types, and stirring is performed by splitting and merging the fluid to be mixed when flowing, but in addition to these large stirring effects, the conduit or the stirring blade itself Since compound fibrillation motion is performed by a vibration source, the agitation at the time of division and merging becomes extremely fine and uniform agitation, and when applied to foods, agitation with a smooth texture without roughness can be obtained, and it is also useful in the fine chemical field. It is extremely suitable for stirring especially polymers.

For example, when whipping fresh cream in the food sector, fresh cream and nitrogen gas are introduced into a conduit as fluids to be mixed, and the fibrillating motion allows the whipping of the fresh cream to be carried out extremely uniformly. This technology can also be applied to other manufacturing processes such as ice cream.

Further, even when mixing other fruits with yogurt, it is possible to obtain a uniform and good mixing effect that does not destroy the fruits.

In addition, as another example of food applications, the mixer device of the present invention is extremely useful in a process where wine is introduced into a conduit and the oxygen in the wine is pushed out by mixing with nitrogen gas to prevent the wine from oxidizing. By mixing wine and nitrogen gas, it is possible to remove oxygen and prevent wine from oxidizing without adding an antioxidant.

Further, as another example of application of the present invention, it can be used for mixing paints when color matching or mixing inks.

In the present invention, any method can be selected as the vibration source, but an electromagnetic drive type vibration source or an ultrasonic vibration source that can be easily electrically processed is mainly suitable.

Further, in the present invention, the vibration source is a single vibration source fixed to a conduit, a stirring blade, or the entire device integrated with these, and a high-frequency vibration and a low-frequency vibration are combined in this single vibration source. supply,
It is possible to obtain the above-mentioned efficient mixing action in a composite mode of vibrations having different frequencies. Also,
In the present invention, by connecting separate driving sources to the conduit and the stirring blade, for example, applying high frequency vibration to the conduit and low frequency vibration to the stirring blade, efficiency is achieved in this compound fibrillation motion mode. It can also provide good stirring action.

Further, according to the present invention, the frequency can be repeatedly or intermittently changed from low frequency to high frequency to a single driving source, and even a combination of temporally different frequencies can provide good results. It is also possible to provide complex vibration modes.

[Embodiments] Preferred embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an embodiment in which a mixer device according to the present invention is driven by an electromagnetically driven vibration source.

The conduit 10 has a cylindrical shape and is made of a material that is not affected by the fluids to be mixed, such as plastics such as vinyl chloride or stainless steel. In the embodiment, in order to mix two different fluids, the conduit 10 has a Two introduction holes 10a and 10b are provided. And both introduction holes 10a, 10
Branch pipes 12 and 14 are airtightly fixed to b, respectively, and different types of fluids to be mixed, denoted by symbols A and B, respectively, flow from the branch pipes 12 and 14 to the conduit 10.
be guided towards.

Each of the branch pipes 12 and 14 is connected to a flow path (not shown) through flanges 16 and 18, respectively, and in the embodiment, the mixed fluids A and B are discharged naturally from the flow path or are pumped under pressure. and is fed into the conduit 10.

A flange 20 is fixed to the other end of the conduit 10, and is airtightly connected to a downstream conduit, not shown, as is well known, and the mixed fluid is guided to the next step.

A stirring body 24 having a plurality of stirring blades 22 is provided in the conduit 10, which in this embodiment essentially forms a conventional static stirring element as such; It is characterized in that it is supported within the conduit 10 so as to be freely defibrillable.

That is, like the aforementioned conduit 10, the stirring body 24 is made of plastic or stainless steel that is not affected by the fluid to be mixed, and its shaft portion 24a
One end has a slider portion 24b that fits with the inner diameter of the conduit 10, and the other end is provided with a small-diameter support shaft 24c, which supports the conduit 10.
It is supported by a bearing 26 fixed in 0.

Therefore, it is understood that the stirring body 24 is supported within the conduit 10 so as to be able to vibrate finely as desired in the axial direction or rotational direction.

A plurality of stirring blades 22 are fixed to the stirring body 24 as in the conventional case, and the stirring blades 22 of the embodiment
has a half-moon shape.

FIG. 2 shows the fixed state of the stirring body shaft 24a and each stirring blade 22 in the embodiment as seen from the axial direction. The blades are fixed symmetrically on both sides of the blade, and adjacent blades are aligned with a phase difference of 60 degrees.

As is clear from FIG. 2, according to this embodiment, the stirring blades 22 are provided at a considerably large proportion to the opening area of the flow path, and as will be described later,
When each stirring blade 22 makes a fibrillating motion, when the fluid divided by the adjacent blades receives vibration due to the fibrillation of the blade 22, the vibrations given by the adjacent blades interfere with each other. Together, it becomes possible to obtain an extremely fine stirring action.

As described above, according to this embodiment, the stirring body 24
is rotatably supported within the conduit 10,
In this embodiment, in order to actually drive the stirring body 24, a vibration source 28 is provided at one end of the conduit 10, and the vibration source 28 in this embodiment is an electromagnetically driven vibration source.

The vibration source 28 of the embodiment includes a diaphragm 30 for transmitting vibrations to the stirring body 24, and the diaphragm 30 made of a thin metal plate has an outer circumference that is similar to the conduit 10.
The flange 32 and the fixing ring 3 are airtightly fixed to the
It is firmly sandwiched and supported between 4 and 4. Of course, gaskets 3 are provided at both ends of the diaphragm 30.
6 is provided to prevent fluid leakage.

The inner periphery of the diaphragm 30 is fixed to the slider portion 24b of the stirring body 24, and for this purpose, a stator 38 is screwed and fixed to the end of the flange portion 24b, and the diaphragm 30 is firmly fixed by the stator 38. It is fixed to the end of the flange portion 24b.

The diaphragm 30 allows the stirring body 24 to freely move in the axial direction due to its flexibility, and also allows the stirring body 24 to move freely in the axial direction due to its fixed position on the flange 32.
can be positioned and held approximately in a predetermined position. A movable coil 40 for forming a vibration source is fixed to the stator 38 by an insulating support frame 42, and a desired drive current is supplied to the movable coil 40 from an external drive circuit to be described later. It is preferable to supply this drive current through, for example, a flexible printed circuit board disposed on the surfaces of the stator 38 and the diaphragm 30, so that the movable coil 40 can be supplied as desired without impairing the flexibility of the diaphragm 30. Drive current can be supplied.

On the other hand, a core 44 is fixed at a position facing the moving coil 40, and this core 44 is integrally fixed to the fixed ring 34 via a disk yoke 46, a ring magnet 48, and a ring yoke 50. . Each of the yokes 46 and 50 is made of a magnetic material, and the ring magnet 48 is magnetized in its axial direction, so that a desired magnetic gap is formed between the inner circumference of the ring yoke 50 and the outer circumference of the right end of the core 44. Since the moving coil 40 is disposed within this magnetic gap, as described above, by supplying the complex alternating current to the moving coil 40, the moving coil 40 undergoes complex vibration in the axial direction. As a result, the stirring body 24 provided within the conduit 10 undergoes a fibrillating movement in the axial direction.

In this embodiment, the composite alternating current supplied to the moving coil 40 consists of superimposed alternating currents from two externally provided alternating current sources 60 and 62.

Both AC sources 60 and 62 each consist of a low frequency source and a high frequency source, for example, a normal commercial frequency of 50Hz.
The frequencies are selected as sufficiently different frequencies from the frequency range from 1 KHz to about 1 KHz.

Therefore, according to this embodiment, the stirring body 24 having the stirring blades 22 performs a fibrillating motion in a complex vibration mode by the composite alternating current supplied from the two alternating current sources 60 and 62. This makes it possible to perform an efficient stirring action.

Normally, the stirring body 24 is caused to move along the axial direction of the low frequency AC source 6 by the vibration of the compound mode.
Large axial movement due to 0 and the high frequency AC source 6
2 in combination with a small axial movement, thereby achieving uniform agitation.

Basically, the movement of the vibration source 28 is a reciprocating motion along the axial direction of the stirring body 24, but the fibrillation mode is controlled by the unsprung load side of the diaphragm 30, that is, the mass of the stirring body 24 and the structure of the shaft support. It is also possible to create a mode in which not only movement along the axial direction but also a predetermined twist is given to the stirring body 24,
The stirring blades 24 shown in FIG. 2 can also be driven in the circumferential direction according to the desired mode.

As described above, according to this embodiment, the vibration source 28
By supplying a predetermined composite alternating current to the moving coil 40 of the stirring body 24 or the stirring blade 2
2 makes a fibrillating motion in the axial direction or circumferential direction within the conduit 10 in a compound mode, and the mixed fluids A and B guided into the conduit 10 are stirred not only by the static stirring action of the stirring blade 22 but also by the fibrillating motion. It becomes possible to stir and mix efficiently.

In the embodiments described above, an electromagnetically driven vibration source using a movable coil is shown, but it is also possible to fix the coil and arrange the permanent magnet on the movable side.

Further, although the vibration source in the above embodiment is an electromagnetically driven vibration source, it is also possible to use an ultrasonic vibration source in the present invention.

In the case of an ultrasonic vibration source, a piezoelectric vibrator made of barium titanate or the like is attached to the diaphragm 30 shown in FIG. The piezoelectric vibrator vibrates due to the piezoelectric effect, and this vibration is transmitted to the stirring body 24 to perform the desired mixing and stirring action.

FIG. 3 shows another embodiment of the mixer device according to the invention, in which the conduit 1
Separate vibration sources are connected to the stirring body 10 and the stirring body 124, respectively.

In the figure, the conduit 110 is shown at its branch 112.
The fluids to be mixed are indicated by arrows A and B from 114 and 114, respectively.
The stirring body 124 described above is supported in the conduit 110 so as to be able to be fibrillated.

The stirring body 124 in the embodiment is provided with different stirring blades 122a and 122b in its axial direction, and the introduced fluids A and B are mixed by stirring coarsely and then finely in sequence.

In this embodiment, a coil 172 is fixed to the outer tube of the conduit 110 via a holder 170, and a relatively low frequency alternating current is supplied to the coil 172 from a drive source 174.

On the other hand, a ring-shaped magnet 1 is placed on the substrate side of the device at a position close to the coil 172.
76 is provided with a yoke 178, and due to the electromagnetic action between the coil 172 and the ring-shaped magnet 176, the conduit 110 is caused to fibrillate at a relatively low frequency in accordance with the alternating current from the drive source 174. It is understood that

On the other hand, the stirring body 124 is provided with an ultrasonic horn 180 on its shaft.
82 has ultrasonic transducers 182 and 184 attached to its base, and an ultrasonic drive signal from an ultrasonic oscillation source 186 is supplied to both transducers 182 and 184, thereby generating ultrasonic waves from the ultrasonic horn 180. The vibration is transmitted to the stirring body 124, and each stirring blade 122a, 122b of the stirring body 124 can be fibrillated at high frequency.

Therefore, according to this embodiment, by combining the coarse low frequency vibrations of the conduit 110 and the fine high frequency vibrations of the stirring body 124, it is possible to obtain a mixed mode stirring action suitable for stirring.

As described above, according to the present invention, two or more different types of vibrations are applied to the conduit and stirring body of the mixer device, and in the embodiments, the vibrations are shown as ultrasonic and electromagnetically driven vibrations. However, it is also possible to use any other vibration means such as motor rotation for these vibrations in the present invention.

Furthermore, the two or more types of different vibrations may be provided by applying two types of electrical supply signals to a single vibration source, or by supplying one type of vibration to a single vibration source continuously or intermittently. It may be applied while changing the frequency.

Further, in the present invention, two or more types of vibration sources may be provided, and each may be connected to the conduit or the stirring body alone or separately.

In the present invention, the vibration device for vibrating either or both of the conduit and the stirring body described above may be not only the electromagnetic drive type or the ultrasonic drive type described above, but also any other drive mechanism. Can be done.

For example, in this type of drive mechanism, a motor is installed on the base side, a cam is installed on the main shaft of the motor,
On the other hand, it is possible to fix a cam follower on the conduit or stirring body side, bring the cam rotationally driven by the motor into contact with the cam follower on the driven side, and apply desired vibration to the conduit or stirring body by the rotation of the motor. can.

According to this embodiment, it is possible to provide vibration in a relatively low frequency range where the vibration frequency itself is not very high, and it is also possible to set the vibration stroke sufficiently large compared to ultrasonic vibration or electromagnetic vibration. Such a low frequency, large stroke vibration excitation device can be arbitrarily provided depending on the type of fluid to be used.

[Effects of the Invention] As explained above, according to the present invention, a compound fibrillation motion is applied from a vibration source to the stirring body, which is a static stirring element, disposed in the conduit and to the conduit, thereby causing the fluid to flow. When a static stirring action is performed by repeating division and merging with the stirring blade, the compound fibrillation motion imparts the desired vibration to the liquid, and as a result, the effect of the static stirring and mixing action can be significantly enhanced. ,
A mixer device can be obtained which is particularly useful for mixing fine particles.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a preferred first embodiment of the mixer device according to the present invention, which uses an electromagnetically driven vibration source;
FIG. 2 is a cross-sectional view of the stirring body in FIG. 1 as viewed from the axial direction, and FIG. 3 is a cross-sectional view of a main part of a second preferred embodiment of the mixer device according to the present invention. 10, 110... conduit, 22, 122a, 12
2b... Stirring blade, 24,124... Stirring body, 2
8, 60, 62, 174, 186... vibration source.

Claims (1)

[Scope of Claims] 1. A conduit that guides a fluid to be mixed, a stirring body provided in the conduit and having a plurality of stirring blades, and two or more different types of fine particles arranged in the conduit or the stirring body according to an electrical input signal. 1. A mixer device comprising: a vibration source that provides a dynamic motion; the mixer device is characterized in that the mixer device is characterized in that the mixer device includes a vibration source that provides a dynamic motion, and that fibrillates an agitator in a conduit in a compound mode to promote a stirring action of a fluid to be mixed. 2. The mixer device according to claim 1, wherein the vibration source is composed of a single vibration source, and the vibration frequency thereof changes sequentially.