JPH10216491A - Liquid mixer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable manufacturing cost and using in low pressure line by holding a clearance in which a cylindrical surface flow of thin thickness is obtained between a columnar block on which surface a spiral groove is formed and the inner wall of a cylindrical casing to hold the columnar block. SOLUTION: Liquid A and liquid B injected from injection ports 3, 4 respectively are turned into a turning flow turning in the same direction around a base column 10a of a block 10 in an annular mixing chamber, and by injection pressure, a part thereof is turned into a surface flow or a peripheral surface flow flowing in the axial direction of the columnar block 10 mainly in a clearance path G between the columnar block 10 and the inner wall of a casing 1, and the other part thereof is turned into a spiral flow guided by a spiral groove 13. The surface flow and the spiral flow are mixed as they flow, and the mixed flow passes through a contraction path H by a conical liquid collecting cone 16 at the head of the columnar block 10 and reaches a discharge port 9. As a result, manufacturing cost is made low and the device can be used in a low pressure line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixing device for mixing two or more liquids having different specific gravities or viscosities in a flow direction.

[0002]

2. Description of the Related Art The present inventor has developed a liquid mixing apparatus in which a mixing block having a large number of cross paths engraved on a cylindrical peripheral surface in the form of a stitch is brought into close contact with the inner surface of a cylindrical case or an elastic cylinder. No. 150791). Although this apparatus has excellent mixing performance in a high pressure range, it has a disadvantage that the manufacturing cost of the mixing block is high. The basic idea of the above device is to make the mixed liquid collide in a large number of intersections and mechanically mix them.In order to collide efficiently, the leakage around the intersection should be minimized. Is what you do.

[0003]

However, it was accidentally discovered that even if there is a leak, if the leak is within a certain range, an imperfect but fairly good mixed state can be obtained. It has been found that a spiral groove that can be easily manufactured can be adopted instead of the road. The present invention has been developed based on this finding, and the present invention is to provide a liquid mixing apparatus which is inexpensive to manufacture and can be used in a low pressure pipeline.

[0004]

SUMMARY OF THE INVENTION The present invention comprises forming a thin cylindrical surface flow along a surface of a cylindrical body in a cylindrical casing and generating a spiral flow substantially orthogonal to the surface flow. The helical flow mixes the surface flow so as to be continuously cut, and the apparatus is configured such that a cylindrical block is supported while maintaining a gap for obtaining a thin cylindrical surface flow between the inner surface and a cylindrical casing. And a spiral groove is formed on the surface of the cylindrical block. When the viscosity difference or specific gravity difference of the liquid to be mixed is large, small projections are provided in the spiral groove.

[0005]

In the drawings, 1 is a cylindrical casing, 2 is a base, 3 is an A liquid inlet, 4 is a B liquid inlet, 5 is a premixing chamber, and 6 is a support hole. Reference numeral 7 denotes a head, which is provided with a conical liquid collecting chamber 8 and a mixed liquid outlet 9. Reference numeral 10 denotes a cylindrical block housed and held in the empty space 1a of the cylindrical casing, and has a base column 10a and a mounting base end 11 connected to each other, and the base end 11 is detachable from the support hole 6 of the case. And is supported. The inlets 3 and 4 are cylindrical 10a
Are provided in the circumferential tangential direction, thereby generating a swirling flow in the mixing chamber. G is a gap between the peripheral surface 12 of the cylindrical block and the inner wall of the casing and serves as an axial surface flow passage. When the liquid to be mixed is a high-viscosity liquid such as a resin liquid, the passage gap G of the surface flow is 5/100 to 20/100 m.
m and 1/100 to 5 / in the case of a low-viscosity liquid such as a solvent.
It is good to be 100 mm. The size of the cylindrical block 10 varies depending on the flow rate and viscosity of the mixed solution, but is, for example, 30 mm in diameter and about 50 mm in length. The shape and cross-sectional area of the spiral groove are, for example, M30 to M50 coarse threads. The cross-sectional area of the groove 13 is approximately 4 to 30 mm ² . The angle of the thread 14 is in the range of 30 ° to 60 °.
In FIG. 2 and subsequent figures, reference numeral 15 denotes a protrusion protruding into the spiral groove 13. The projections protruding into the grooves disturb the helical flow when it is relatively difficult to mix, and it is a means to assist mixing, so it may be a regular flathead screw or a round bar screw, and the arrangement is regular in the circumferential direction Alternatively, it is not necessary to make the intervals constant, and the arrangement density and the like are experimentally determined depending on the liquid to be mixed.

[0006]

The liquid A and the liquid B injected from the respective inlets in the above-described apparatus are turned into a swirling flow around the base cylinder 11a of the block 10 in the same direction in the annular mixing chamber.
Due to the injection pressure, part of the swirling flow becomes a surface flow or a peripheral flow mainly flowing in the gap passage G between the cylindrical block and the inner wall of the casing in the axial direction of the block, and the other part is guided to the spiral groove 13. It becomes a spiral flow. The superficial flow and the spiral flow are mixed as they flow, and reach the discharge port 9 through the constriction passage H formed by the conical liquid collecting cone 16 provided at the tip of the cylindrical block. The mixing capacity of the apparatus of the present invention is proportional to the length of the cylindrical block 10 if the configuration of the apparatus and the mixing conditions are constant, but the mixing pressure increases with the length. The maximum length is 3 to 5 times, and at most 10 times. The protrusions 15 in the groove disturb the helical flow and consequently promote mixing with the surface flow,
Block length can be shortened. Note that the cylindrical block may be divided and accommodated in several pieces.

[0007]

[Embodiment 1] A cylindrical block having an outer diameter of 29.8φ and a screw portion length of 140mm having a thread groove engraved with the same specification as the M30 coarse thread was mounted in a cylindrical casing having an inner diameter portion of 30.0φ and an inner diameter portion of 160mm. Solution A with a viscosity of 1200 cps
cc / sec and supply 2 c of B liquid with viscosity 150 cps
When the mixture was supplied at c / sec and continuously mixed, the mixing pressure was 8
A homogeneous mixture was obtained at Kg / cm ² G.

[0008]

Example 2 The same mixing apparatus as in Example 1 was used with a viscosity of 2000 c.
A liquid of ps is supplied at 3 cc / sec and B liquid of viscosity 110 cps is supplied at 1 cc / sec, and the mixing pressure is 2 kg / cm ² G.
A mixed solution was obtained.

[0009]

Embodiment 3 In Embodiment 1, the lengths of the cylindrical block and the cylindrical casing are each reduced by 30 mm, and 28 slotted flat head screws are projected in the spiral groove of the cylindrical block so as to be distributed almost evenly. When the solution A and the solution B were supplied at the same flow rate, an equivalent mixed solution was obtained at a pressure of 8 kg / cm ² G or less.

[Brief description of the drawings]

FIG. 1 is a vertical side view of the present apparatus.

FIG. 2 is a side view of a cylindrical block provided with protrusions in grooves.

FIG. 3 is a sectional view taken along the line AA of FIG. 1;

FIG. 4 is a partially enlarged sectional view of a spiral groove.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical casing 2 Base 3, 4 Injection port of liquid to be mixed 5 Premixing chamber 7 Top part 8 Collection chamber 9 Outlet 10 Cylindrical block 10a Base cylinder 12 Block peripheral surface 13 Spiral groove 15 Projection 16 Conical liquid collection cone G Surface layer Flow passage gap H Throttle passage

Claims (3)

[Claims] 1. A liquid mixing apparatus comprising a cylindrical block supported with a gap for obtaining a thin cylindrical surface flow between the inner wall of a cylindrical casing and a spiral groove formed on the surface of the cylindrical block. . 2. The liquid mixing apparatus according to claim 1, wherein a small projection having a height such that the head does not reach the top of the groove wall is provided in the spiral groove. 3. A base cylinder having a diameter smaller than that of the cylindrical block is continuously provided on the side of the cylindrical block to be mixed with the liquid to be mixed, and a liquid injection port is provided in a circumferential tangential direction of the base cylinder. Or the liquid mixing device according to 2.