JP2513475B2 - Liquid mixing and ejection method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for mixing and ejecting or ejecting liquid and a device therefor.

[Conventional technology]

Originally, it is extremely rare to use a single liquid as it is in discharging and ejecting or spraying a liquid, and most of the liquids are mixed with a plurality of types of liquids. In addition, the mixing operation of the plurality of kinds of liquids is generally performed as a preliminary operation before being charged in the spouting machine or the applicator. Because it is very difficult to maintain a precise mixing ratio and to obtain a uniform dispersion, and if you do not rely on specialized equipment and its special work, you will not get a satisfactory mixed liquid. Is.

However, recently, there are many cases in which the mixing work must be performed immediately before the ejection or the ejection. For example, it is a case of handling a two-component mixed curable resin or the like. In these cases, this was done just before the gun, that is, with the mixer directly connected to the gun. Here are some examples.

(1) Gun with static mixer See Fig. 10. A baffle plate type mixer 161 has a discharge gun 167 directly connected to one end thereof. Pressurized two kinds of liquids Q and P flow in from one inlet, both liquids merge and move to the downstream, and are mixed by the baffle plates 162A, 162B. . However, its mixing effect is very low and it has to be repeated several times. Since the mixing effect increases as the number of times increases, the length of the mixer can be as short as 300 mm and as long as 1000 mm. This length is the length of the mixing chamber, and such a length causes various problems. Firstly, the liquid in the mixing chamber is incompletely mixed, and a large amount of the liquid causes a large amount of waste. Secondly, they may react during the long journey and cannot be discharged. Third, cleaning is difficult. Fourth, the mixer is generally not heated to prevent reaction and was not suitable for use in high-viscosity paints or in winter.

(2) Gun with rotary agitator mixer See FIG. 11. A discharge gun 177 is directly connected to one end of a horizontal stirring blade mixer 171. The volume of the stirring tank needs to be at least 500 cc, and in this case as well, there is much waste. In addition, the seal for the high-speed rotating part of the stirring blade 17
5 was also easily damaged and was difficult to maintain.

[Problems to be solved]

In the above-mentioned conventional method, it is judged that further improvement means is difficult due to their structure. Therefore, the present inventor examined the improvement measures from the viewpoint completely different from the above-mentioned conventional method.

The motive of the present invention was to shorten the mixing process and the mixing time and to reduce and simplify the apparatus.

[Means for solving problems]

The gist of the present invention is to pass two kinds of liquids to be mixed through respective narrower channels, that is, bottleneck passages, and to face the outlets of the bottleneck passages, and at least one of both outflow streams thereof. A method and a device for mixing them by colliding them at a flow velocity of 30 m / sec or more and then discharging or jetting them from a nozzle.

There are two kinds of methods of the present invention, and the respective items will be described separately.

(1) Basic method See FIG. Two pressurized liquids A and B
To the flow paths 1 and 2 respectively, and squeeze them to form the bottleneck 3 and 4, and the outlets of these bottleneck are faced to each other so that the outflows A ₁ and B ₁ having the increased flow velocity collide with each other. , Thereby mixing both liquids, guiding the mixed liquid AB ₁ to one flow path 6, and passing it through the discharge flow path 6 in the gun 10,
This is a method of ejecting or ejecting the mixed liquid from the nozzle 7.

The head-on collision of the liquid means that the directions of the outflows from both bottlenecks are opposite to each other and are in a straight line as shown in FIG. In this case, the collision force generated is
It is significantly larger than the static type and the stirring type described above. Especially when the flow velocity is 30 m / sec or more, it becomes remarkable. Both liquids are crushed into each other by the force of the large collisions, and become fine dust and are disturbed. That is, mixing is performed. Since these hydrodynamic calculations have too many unknown factors and are extremely difficult to calculate,
Omitted for the time being.

However, the force generated at the time of the above collision, that is, the amount and speed of the outflow from the bottleneck, is the pressure applied to the liquid, the shape of the bottleneck,
It depends on the size and length of the cross-sectional area, the characteristics of the liquid, and the temperature. Therefore, when changing the mixing ratio of both liquids, the above-mentioned factor may be changed.

Further, in the above-mentioned frontal collision, if there is a significant difference between the forces of the two outflows, the outlet of the bottleneck having the smaller force is directly pressed to cause the outflow. In order to prevent this, it is sufficient that the two outflow streams are not placed on the same straight line. That is, these outflow directions may be avoided by crossing each other and colliding. As a result, it is possible to avoid a direct impact on the exit of the bottleneck with a large force. The cross-over collision described above is as shown in FIG. That is, the two outflow directions that face each other intersect and intersect. However, in the cross collision, the force generated is comparatively small as compared with the case of the above-mentioned front collision, so that the mixing effect is inevitably lowered.

(2) Development of Basic Method The present invention is a method of repeating the above-mentioned basic plural times to perform mixing in a multi-stage manner and then discharging or jetting from a nozzle.

See FIG. Pressurized two kinds of liquid C, D,
They flow into the respective flow paths 11 and 12, and these flow paths are narrowed to form the bottleneck 13 and 14, through which the flow velocity is increased, and the outlets of these bottleneck are made to face each other so that their outflow
C ₁ and D ₁ are made to collide head-on, and thereby both liquids C and D are mixed to form a primary mixed liquid CD ₁ , one of which is guided to the flow path 16, and the primary mixed liquid CD ₁ is divided into two. It divides into the flow paths 17 and 18, and these flow paths are narrowed through the entrance flow paths 21 and 22, and the narrow paths 23 and 24 are again drawn.
Through a head-on collision of their outflows, thereby remixing the above primary mixed liquid CD ₁ into a secondary mixed liquid CD ₂ , which is It is led to the flow path 25, and if necessary, the same operation as described above is repeated again to obtain a third-order mixed liquid CD ₃ , a fourth-order mixed liquid CD ₄ ... It is a method of discharging or jetting from them.

Incidentally, in the frontal collision in the upper side, when the velocity of both outflows is low, the desired mixing effect was not obtained, and as a result of the experiment, one of them was at least 30 m / sec or more. It turned out to be desirable.

Also, the ones that were effective as a liquid when handled experimentally were:
Dissolution type coating material, emulsion type coating material, main component of two-component curable resin or its curing agent,
Examples include catalysts and solvents.

Of the above liquids, not only those having a relatively high viscosity, but when adjusting the mixing ratio precisely, it is also possible to increase the flow rate of the outflow from the bottleneck by lowering the viscosity of the supply liquid as described above. Therefore, at least one of the liquids to be mixed may be heated to a temperature higher than room temperature.

Next, the basic structure of the apparatus leading to the basic method of the present invention will be described. See FIG.

(3) Two automatic opening / closing valves 51A and 51B for supplying liquid are mounted on the body 60 of the apparatus. The outlet flow passages 58A, 58B of these valves communicate with two receiving flow passages 59A, 59B provided in the body 60, and they are two inlet flow passages on the impingement mixing plate 61 in the gun body. Connected to 64A, 64B.

The structure of the collision mixing plate 61 is cylindrical and is divided into upper and lower parts. The upper portion is a slit plate 62, and the upper surface is provided with the above-described two entry channels 664A and 64B penetrating approximately symmetrically around the center point on the plate toward the outer periphery. And at the center of the lower surface of the plate, a blind hole having a depth D ₁ is provided as a part of the mixing chamber, and on the center line connecting the blind hole and the two inflow channels 64A, 64B. Is provided with two slits 65 and 66. Next, the lower part is a mixing plate 63, and a mixing chamber 67 having a depth D ₂ which is a hole having the same diameter as the blind hole 67 _S is provided in the center thereof, and a lower particle flow path 68 is provided below the mixing chamber 67. Is provided.

The flow-down flow path of the collision mixing plate is connected to the discharge flow path 69 in the body 100, and further connected to the nozzle 70 and the like.

Next, the structure of the apparatus, which is a further development of the main body method, will be described. See FIGS. 6 and 7.

(4) Two automatic opening / closing valves 91A and 91B for supplying liquid are mounted on the body 100 of the apparatus. The outlet passages 98A, 98B of these valves communicate with two receiving passages 99A, 99B provided in the body 100, and they are on a first collision mixing plate 101 provided in the gun body 100. It communicates with the two entry channels 104A and 104B.

The structure of the first collision mixed liquid 101 is a cylindrical shape, the upper surface of the two inflow passages 104A, 104B described above are approximately symmetrical to the outer periphery of the plate about a center point on the plate. It is provided through. In addition, a blind hole having a depth D ₃ as a part 107 _S of the mixing chamber is provided at the center of the lower surface of the plate, and the blind hole is connected to the two entrance channels 104A and 104B. Two slits 105 and 106 are provided on the center line.

Next, the second collision mixing plate 111 is connected to the lower surface of the first collision mixing plate 101. The structure of the plate is the same as that of the first collision mixing plate 101, that is, the plate is provided with a branch flow path of a flow-down flow path from the mixing chamber above the plate. It is a thing. That is, a hole having the same diameter as a part (blind hole) 107 _S of the mixing chamber on the lower surface of the first collision mixing plate 101 is opened downward with a depth D ₄ on the upper surface of the second collision mixing plate 111. Let this be a mixing chamber 107. Further, below the mixing chamber 107, a single downflow channel 108 is opened with a certain depth D ₅ , and a branched flow is distributed to the right and left in a straight line to the downflow channel 108 at right angles. Road 113A, 1
13B are provided, and the branch flow passages 113A and 113B have downward entrance passages 114A and 114B which have a certain length L and which face downward at right angles. The subsequent process is the same as that of the first collision mixing plate 101. That is, at the center of the lower surface of the plate, a part of the mixing chamber 11
Is blind holes provided as 7 _S,該盲hole and the two entrance passages
On the center line between 114A and 114B, two slits 115 and 116
Is provided. When the second collision mixing plate 111 is connected to the first collision mixing plate 101, the slits, that is, 105, 106 and 115, 116 are stacked so as to intersect with each other.

As described above, the two collision mixing plates are connected in an overlapping manner. However, if necessary, a plurality of collision mixing plates 121 having the same structure, a fourth collision mixing plate 131, a fifth collision mixing plate 141, ... The collision-mixing plates of (1) and (2) are overlapped and connected, and are incorporated into the body 100.

Mixing chamber on the last impingement mixing plate connected as described above
A flow-down flow path 148 is connected to the discharge flow path 149 in the body 100 from the flow path 147, and is subsequently connected to the nozzle 150 and the like.

It should be noted that the directions of the plurality of slits are, when viewed in a plan view, crossed and stacked (8th embodiment).
Alternatively, they may be stacked on the same straight line (see FIG. 9) when these directions are viewed in plan.

The cross-sectional shape of the slit is preferably triangular or quadrangular. The former has advantages such as easy fabrication, and the latter has a small cross-sectional resistance.

[Action]

(1) Above [Means for Solving Problems] (3)
The operation of the device in the basic structure of the paragraph will be described.

Please refer to FIG. 5 again. The two types of liquids A and B pressurized to the required pressure pass through the receiving channels 59A and 59B in the body 60 via the respective automatic opening / closing valves 51A and 51B, and the collision mixing plate 6
Reach one. Then, the thin slits 65 and 66 pass through the inside of the two inflow passages 64A and 64B on the upper portion of the plate, that is, the upper surface of the slit plate 62, respectively, and pass through them. At that time, the flow velocities of the respective liquids were increased (around 30 m / sec), and the two types of liquids A and B that flowed out from the slit holes 65 and 66 facing each other.
Collides head-on with two outflows A ₁ and B ₁ . At this time, both liquids A and B have high velocities and large momentums, the liquids A and B are crushed into fine dust by their forces, and the liquids A and B are mixed by turbulent flow due to collision. The mixed liquid AB ₁ thus mixed is pushed by the subsequent mixed liquid from the mixing chamber 67, flows out to the downflow passage 68, and then passes through the discharge passage 69 in the body 60, and the nozzle 70 connected thereto. Etc. are discharged or ejected.

(2) Above [Means for Solving Problems] (4)
The action of the gun in the expanded structure of the term is described.

See FIGS. 6 and 7. The two types of liquid C and D pressurized to the required pressure are the automatic opening / closing valves 91A and 91B, respectively.
Through the receiving flow paths 99A and 99B in the body 100 of the apparatus to reach the first collision mixing plate 101. Then, they enter the entry channels 104A and 104B on the plate, and enter the narrow slit holes 105 and 106 at the end thereof. While passing through the same slit,
The liquids C and D are accelerated and flow out into the mixing chamber 107 through the slit holes facing each other. At the same time, these outflows C ₁ and D ₁ collide head-on with each other. At this time, both are high speed and both have large momentum, the liquids C and D are crushed into fine dust by their force, and the flowing liquids C and D are mixed by the turbulent flow due to the collision. The fitting liquid CD ₁ thus mixed is pushed out of the mixing chamber 107 by the succeeding mixed liquid CD ₁ and flows out into the downflow passage 108. The mixed liquid CD ₁ passes through the branched flow passages 113A and 113B, which are distributed to the left and right, and enters the inflow passages 114A and 11B, respectively. And at that end, and as in the case above, the slit holes 115, 116
Enter. After that, similarly to the above, after exiting the slit holes respectively, the secondary mixing is performed by frontal collision. The above is the first collision mixing plate 101 and the second collision mixing plate 1
Depending on the mixed liquid CD ₂ obtained with 11, remixing may sometimes be required. At that time, the third collision mixing plate 121 having the same structure as the second collision mixing plate 111 or further the fourth and fifth collision mixing plates 131, 141 are passed to obtain the same mixing effect as described above. . As described above, the mixed liquid CD _X obtained in a sufficiently satisfactory state exits the collision mixing plate, enters the discharge flow path 149 in the body 100, and enters the atmosphere from the nozzle 150 connected thereto. It is discharged or ejected.

Although the method for mixing and ejecting liquid and the apparatus for ejecting the same according to the present invention have been described in detail above, the present invention shows that the liquid is, for example, a dissolved coating agent or an emulsion type coating material, or a main component in a two-liquid mixed curing positive resin. Alternatively, it can be applied to a curing agent, a catalyst, a solvent and the like.

〔The invention's effect〕

According to the method and apparatus of the present invention, two kinds of liquids can be added to 0.5 to 2.0.
Mixing can be done most effectively in a small-volume mixing chamber called cc, and the desired mixing can be done by repeating it several times if necessary, and it is only possible to set a precise minute amount of mixing ratio. In addition, since there is no moving part, the structure is simple and the maintenance is easy, the heat loss is small, and the high temperature liquid can be discharged or ejected, which contributes to the improvement of quality and the efficiency of work.

[Brief description of drawings]

FIG. 1 is an explanatory view of a basic method of the present invention. FIG. 2 is a developed method of the method of the present invention. FIG. 3 is an explanatory view of a frontal collision.
Fig. 5 is an explanatory view of cross collision. Fig. 5 is a sectional view of the basic structure of the present invention. Fig. 6 is a sectional view of a structure in which the basic structure of the present invention is developed. Fig. 7 is the same as the above "E"-"F" sectional view. FIG. 8 is a plan view of the stacking collision mixing plates in which the slit holes are crossed. FIG. 9 is a plan view of the collision mixing plates in which the slit holes are stacked in parallel. FIG. 10 is a conventional static type. Mixing and Discharging Device Fig. 11 is a conventional stirring type mixing and discharging device. Description of main symbols 1,2,6,11,12,17,18,21,22,25,46, ... Flow path 3,4,13 , 14,23,24 …… Bottle 7,47,70,150 …… Nozzle 51A, 51B, 91A, 91B …… Automatic opening / closing valve for liquid 58A, 58B, 98A, 98B …… Valve outlet flow path 59A, 59B, 99A , 99B …… Reception channel 61 …… Collision mixing plate 62 …… Slit plate 63 …… Mixing plate 64A, 64B, 104A, 104B, 114A, 114B …… Ingress channel 65,66,105,106,115,116 …… Slit 67,107,117… … Mixing room 67 _S , 107 _S , 117 _S …… Part of mixing room 68,108,118 …… Downflow channel 69,149, …… Discharge channel 70,150, …… Nozzle 101 …… First collision mixing plate 111 …… Second collision mixing plate 121 …… Third collision mixing plate 131 …… Fourth collision mixing plate 141 …… Fifth collision mixing plate A, B, C, D …… Liquid A ₁ , B ₁ , C ₁ , D ₁ , CD _1a , CD _1b・_・・ Outflow AB ₁ , CD ₁ , CD ₂ , CD _X ...... Mixed liquid

Claims (5)

(57) [Claims] 1. Two kinds of pressurized liquids (A, B) are made to flow into respective flow paths (1, 2), and these flow paths are narrowed down, and bottleneck (3,
4) and the flow velocity is increased accordingly, and at least one of the outflows (A ₁ , B ₁ ) from them collides with each other at a flow velocity of 30 m / sec or more, thereby causing both liquids (A, B) is mixed (AB ₁ ) and then discharged or jetted from a nozzle (7) through a single flow path (6). 2. A patent characterized in that at least one of the two pressurized liquids (A, B) is a liquid heated to a temperature higher than room temperature. The method for mixing and ejecting or ejecting liquid according to claim 1. 3. Two pressurized liquids (C, D) are made to flow into respective flow passages (11, 12), and these flow passages are squeezed to form bottleneck (13, 14). The flow velocity is increased and at least one of the outflows (C ₁ , D ₁ ) from them is made to collide with each other at a flow velocity of 30 m / sec or more, whereby both liquids (C, D) are mixed (CD ₁ ) and then lead it to one channel (16), which is then re-routed to two channels (17,1).
8) Divide it into each flow path (21, 22), narrow down these flow paths again to form a bottleneck (23, 24), thereby increasing the flow velocity, and those bottleneck (23, 24). Outflow flow (CD _1a , C _1b ) from the outlet of 24) is collided, thereby remixing the mixed liquid (CD ₁ ) (CD ₂ ), and then leading to one flow path (25), If necessary, the same operation as described above is repeated, and after mixing (CD _X ), the liquid is ejected or ejected from the nozzle (47) through one flow path (46), and a liquid ejection or ejection method. 4. At least one of the two pressurized liquids (C, D) is a liquid heated to a temperature higher than room temperature. A method for mixing and ejecting or ejecting liquid according to claim 3. 5. A liquid mixing / discharging or jetting device comprising: (a) two liquid automatic opening / closing valves (51A, 51B); and (b) said liquid automatic opening / closing valves (51A, 51B). The flow passages (59A, 59B) communicating with the outlet flow passages (58A, 58B) are provided, and (c) the flow passages (59A, 59B) are respectively provided in the collision mixing plate (6).
1) Communicate with the upper two receiving channels (64A, 64B), and (d) The collision mixing plate (61) is cylindrical and divided into upper and lower parts, and the upper part is a slit plate (62). ), The two receiving channels (64A, 64B) are opened as through holes substantially symmetrically toward the outer periphery around the center point on the plate, and the central portion of the lower surface of the collision mixing plate (61) is A blind hole is provided as a part of the mixing chamber (67 _S ), and a slit (65 _S ) is provided between the part of the mixing chamber (67 _S ) and the two receiving channels (64A, 64B). , 66), and the collision mixing plate (6
The lower part of 1) serves as a mixing plate (63), which is part of the mixing chamber (6
7 _S ) A hole having the same diameter as that of the mixing chamber (67), and a descending flow path (68) connected to the mixing chamber (67) is provided below the mixing chamber (67), (e) The descending flow path in the collision mixing plate (61). The (68) communicates with the discharge flow path (69) in the body (60) and further the nozzle (7
0), and a device for mixing and ejecting or ejecting liquid.