JP2014009671A - Two-liquid mixer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a function directly adjusting a flow rate of an undiluted solution in a mixer.SOLUTION: A flange member 8 fitting with a nipple member 9 has a seal end surface. By a screw 9b formed on the nipple member, the seal end surface moves in an axial direction with rotations of the flange member 8, and a clearance C between the seal end surface of a counterpart seal end surface 7a of a throttle pipe 7 is changed. A degree of negative pressure of a negative pressure chamber 12 formed on an outer periphery of the throttle pipe 7, and a flow rate of an undiluted solution flowing into an intermediate opening portion B from the clearance C can be controlled by the clearance C.

Description

  The present invention relates to a two-component mixer that sucks and mixes a stock solution by the ejector effect of a main solution, and directly discharges the mixed solution to the atmosphere.

Currently, two-component mixers that are actually used include a coolant dilution device that dilutes cutting oil and water and a car wash nozzle that dilutes detergent and water.
In general, a liquid in which the main liquid is water and the stock solution is more viscous than water is often used. For this reason, there is a problem that the suction amount cannot be made too large due to the influence of the orifice diameter D of the adjusting valve for adjusting the suction amount of the stock solution and the inner diameter and length of the stock solution side hose, and high concentration mixing cannot be performed.

Further, an ejector mixer used for car washing and coolant dilution has a configuration as described in Patent Document 1. That is, this is an example in which there is no large opening that conducts to the atmosphere, and the intermediate opening instead extends long. In the mixer having such a configuration, since the liquid mixture is discharged to the atmosphere at a stretch from the intermediate opening, the flow rate of the liquid mixture is maintained at a considerably high speed, and the strength of the water pressure is used for applications such as car washing. Often.
On the other hand, in the case of coolant dilution equipment, unlike car washing, there are many cases in which the mixture is replenished directly to the coolant tank attached to the processing machine, and the coolant mixture is gently poured so that it does not scatter from the supply port. It is desirable to supply the tank. Therefore, as shown in FIG. 1, after the mixed solution passes through the intermediate opening, the passage is gradually enlarged, and the mixed solution is led to the large opening on the atmosphere side to reduce the flow velocity.
In any of the mixers, as in Patent Document 2, the amount of the undiluted solution sucked up is mostly controlled by a regulating valve. Further, needle valves and ball valves are used as these regulating valves, but the passage is limited by an orifice or a ball hole on the inner diameter side. For this reason, the resistance of sucking up the stock solution is increased, and the amount of suction is limited.
For these reasons, the concentration range of the main solution and the stock solution cannot be increased. In particular, although low density can be adjusted, it is difficult to adjust to high density.

  Therefore, in such an open-air type mixer, a mixer with an adjustment function capable of adjusting the concentration in a wide range is desired.

Patent Publication 2002-273640 Registered Utility Model No. 3174379

  For this purpose, an existing valve such as a needle valve or a ball valve that restricts the passage is not used as the adjustment valve. Instead, the function of directly adjusting the flow rate of the stock solution between the main liquid passage and the mixed liquid passage having a large flow area of the mixer is provided in the mixer.

  In the mixer shown in FIG. 2, the pumping amount of the stock solution is adjusted by changing the interval C from the outlet end of the nozzle on the main passage to the inlet end of the flange member as appropriate.

In order to achieve the above-mentioned object, the flange member 8 fitted to the two-apple member 9 has a seal end surface 8a, and the seal end surface 8a is also rotated along with its own rotation by a screw 9b formed on the two-apple member. It is configured to move in the axial direction. That is, the distance C between the seal end surface 8a and the mating seal end surface 7a of the throttle tube 7 changes.
By the interval C, the degree of negative pressure in the negative pressure chamber 12 formed on the outer periphery of the throttle tube 7 and the amount of the stock solution flowing into the interval C are variably controlled. When the interval C is zero, the stock solution 16 is not sucked up, and when the interval C is fully open, the maximum stock solution flow rate flows in.

By directly changing the interval C on the main passage, the flow path of the main solution and stock solution is not extremely narrowed, so the amount of the stock solution to be pumped can be changed greatly, and a wide range of concentration adjustments are possible. Can do.
The mixer parts, such as the two-apple member 9 of the mixer, the seal end surface 8a of the flange member 8, and the seal end surface 7a of the throttle tube 7, have a simple structure.
Since the concentration adjustment operation can be performed only by the rotation of the two-apple member 9 serving as the jet outlet, the adjustment while observing the mixed state and color of the mixed liquid 18 becomes easy.

FIG. 1 shows a conventional ejector mixer and a needle valve. FIG. 2 shows an embodiment of the present invention. FIG. 3 shows another embodiment of the present invention.

    The concentration adjustment range of the undiluted solution relative to the main solution can be increased with an open-air two-component liquid mixture device. Then, the two-pull member can be rotated by hand and operated while looking at the state of the mixed solution, and a two-component mixer that is easy to handle can be realized.

FIG. 1 shows a cross section of a conventional ejector mixer and a needle valve. Reference numeral 1 denotes a two-component mixer body. The high-pressure liquid from the tap water becomes a high-speed fluid at the throttle, and the ejector effect that sucks up the undiluted solution by the Bernoulli's theorem is proportional to the flow velocity and the pressure in the negative pressure chamber decreases to lower than atmospheric pressure. Get out. In the negative pressure chamber, the liquid is mixed with the undiluted solution, and the mixed liquid enters the gradually expanding opening, and the pressure rises to atmospheric pressure and is discharged. The needle valve located between the stock solution and the mixer is configured to adjust the suction amount of the stock solution by restricting the flow path of the orifice D. Although a ball valve may be used, a needle valve is often used because it is difficult to finely adjust the flow rate.
However, when the orifice diameter D is small and the viscosity is high as compared with the general flow path, the resistance of the undiluted solution is increased.

FIG. 2 shows a cross section of an embodiment of the present invention.
The entire two-component mixer system includes a mixer main body 1, tap water 17 that supplies high-pressure liquid to the water supply port 6 of the mixer 1, a raw solution 16, and a raw solution flow rate adjustment mechanism 2. The mixer main body 1 includes a union member 4 having a high-pressure liquid supply port 6, and a throttle tube 7 fitted to the union member 4 and having a throttle portion 5 having a diameter A. The throttle tube 7 has a seal end face 7a. The intermediate opening 11 includes a flange member 8 having a diameter B, and a two-apple member 9 having a large opening 10. The flange member 8 is fitted in the axial direction on the inner diameter side of the two-apple member 9, and has a seal end face 8a. Further, a pin member 13 is arranged in the diametrical direction along the axial extension of the two-apple member 9. In addition, the cheese member 3 which is the main body of the mixer 1 has a configuration in which the union member 4 and the two-apple member 9 are coupled with screws, and on the inner wall side of the cheese member 3, the throttle tube A negative pressure chamber 12 is formed at the outer periphery of 7 and the end face of the flange tube 8.
In addition, the stock solution flow rate adjusting mechanism 2 can be moved in the axial direction integrally with the flange member 8 and the seal end face 8a by the rotation of the two-apple member 9 by means of a screw 9a formed on the two-apple member 9. And it is the structure which controls the space | interval C with the other seal end surface 7a formed in the said throttle pipe 7. FIG. Further, the stopper member 19 screwed to the body portion 3 of the mixer with a screw 21 has a function of stopping the axial movement at the shoulder portion 9a so that the two-apple member 9 does not unintentionally come off due to screw rotation. Have The stopper 19 is formed with a pointer 19a, and the rotational position of the nipple member 9 can be read by a mark 9c stamped on the circumferential side surface of the two-apple member 9. Further, when the rotation stop disk 22 is screwed to the screw 9b of the two-apple member 9, and the rotation of the two-apple member 9 is to be fixed, the end face of the body 3 is hardly contacted and fixed by friction. It is configured.

FIG. 3 shows a cross section of another embodiment.
The main difference from FIG. 2 is that the flange member 8 fitted axially to the two-piece member 9 has a sealing surface 8a in the taper space 11, and the throttle tube 7 has a taper-shaped sealing surface 7a. The sealing surface moves in the range of the interval C by the screw rotation of the two-apple member 9. Thus, if the sealing surface is tapered, fine control of the flow rate of the stock solution is facilitated.

  This stock solution flow rate adjusting mechanism can also be applied to high-speed car wash and coolant solution diluting devices, and is suitable for the intended purpose of mixing the main solution and stock solution at a predetermined concentration and releasing the mixture solution to the atmosphere.

DESCRIPTION OF SYMBOLS 1 Mixer main body 2 Stock solution flow control mechanism 3 Body 4 Union member 5 Restriction part 7 Restriction pipe 8 Flange member 9 Two-pple member 10 Large opening part 11 Middle opening part 12 Negative pressure chamber 13 Pin member 16 Stock solution

Claims (1)

  In a two-component mixer having a constricted portion A and a slightly large opening B on a concentric shaft, the stock solution is sucked and mixed by the ejector effect of the main solution, and the mixed solution is directly discharged to the atmosphere. The flange member has the other end face or theta-like seal surface, and the seal surface is reciprocated in the axial direction by the screw rotation of the two-piece member within the range of the interval C, so that the stock solution A two-component mixer characterized by controlling the pumping flow rate.

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