JPH0549887A - Static type fluid mixer and its production - Google Patents

Abstract

PURPOSE:To provide the static type fluid mixer which is high in the efficiency of mixing high-viscosity materials, granular substances, concrete, etc., has excellent wear resistance and corrosion resistance, and is low in cost. CONSTITUTION:This static type fluid mixer 1 has a passage pipe 2 in which fluids FA and FB flow and plural pieces of vane bodies 3, 4 which rotate spirally on the inner peripheral surface of this passage pipe 2. The fluids FA and FB are mixed with high efficiency without generating troubles, such as stagnating and clogging, in the mixer in this way. This mixer can be produced at the low cost from a stage for joining the spiral vane bodies 3, 4 on the inner peripheral surfaces of the passage pipes 2a, 2b longitudinally divided to plural pieces and a stage for joining the divided planes of the passage pipes 2a, 2b to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static fluid mixer for mixing two or more kinds of fluids without a mechanical moving part for mixing and a method for producing the same, and more specifically, mixing and dispersion. , A static fluid mixer used in processes such as emulsification, gas absorption, dilution and dissolution, and a manufacturing method. In particular, the present invention relates to a static fluid mixer and a manufacturing method that are optimal when used in a laminar flow region for mixing solids such as powder, gravel, and concrete, and for mixing highly viscous substances.

[0002]

2. Description of the Related Art A static fluid mixer of this type has mechanical moving parts for chemical reaction devices and biological reaction devices in many fields such as chemical industry, food industry, pollution control industry, and electronics industry. Many are used as mixers that do not have. As a manufacturing method of this fluid mixer, there is a method of inserting right-handed or left-handed spiral blades into a pipe and fixing adjacent blades by means such as welding or brazing ( Japanese Patent Publication No. 44-8290). There is also a technique in which a right-handed or left-handed spiral blade is inserted into a pipe, and adjacent blades are locked or fitted to each other and placed in the pipe (West German publication number 2262016). .. Further, there is also one in which a right-handed or left-handed spiral blade is placed between adjacent blades and inserted into a pipe, and the blades are fixed and connected by the support (US Pat.
953,002). Furthermore, there is also one in which a baffle plate twisted to the right or left is inserted into a tubular housing, and concave grooves formed on both end projections of the baffle plate are engaged with each other to connect the two (Patent Publication 1- 31928). Further, there is also one in which a mixer element is manufactured by casting plastics or metal in a lost wax type mold, and the mixer element is arranged in a casing (Japanese Patent Publication No. 57-4369).

[0003]

However, the conventional static fluid mixer described above does not always have sufficient fluid mixing efficiency when mixing a high-viscosity substance, powder or the like. There is. In particular, when it is used for mixing concrete, gravel, etc., it causes blockage in the mixer and mixing is difficult. Furthermore, the mixer element (Japanese Patent Publication No. 57-
The mixer according to No. 4369) has a small effective cross-sectional area of the fluid passage through which the fluid flows. Therefore, when it is used for mixing a high-viscosity substance and powdery particles, the mixer has a joint surface between adjacent mixer elements. However, stagnation or retention of the fluid easily occurs and troubles such as clogging of the fluid passage are likely to occur. Further, since the manufacturing process is performed in a complicated process, there is a drawback that the manufacturing cost becomes high. Furthermore, each of the above-mentioned manufacturing means has a drawback that manufacturing is not easy. In particular, when the blades are welded or brazed to each other, the mechanical strength of the joint is weak, and there is a drawback that the welded portion is broken or broken when a torsional stress is applied. There is also a problem that the manufacturing cost is high in the case of a large size. Further, even if the inner surface of the mixer is coated with rubber, plastics, ceramics or the like in order to improve the abrasion resistance and the corrosion resistance of the mixer, it is difficult because the manufacturing process is complicated. The present invention has been made in view of the above problems, and is a static fluid suitable for mixing powders, highly viscous substances, fluids such as concrete, and having excellent wear resistance, corrosion resistance, and torsion stress. An object of the present invention is to provide a mixer and a manufacturing method of a fluid mixer which can be manufactured easily and at low cost.

[0004]

A static fluid mixer according to the present invention has a passage pipe through which a fluid flows, and a plurality of blades spirally rotating on the inner peripheral surface of the passage pipe. .. Further, a method of manufacturing a static fluid mixer according to the present invention comprises a step of joining a spiral blade body to an inner peripheral surface of a passage tube divided into a plurality of pieces in a longitudinal direction, and a division surface of the passage tube. And a step of joining them to each other.

[0005]

According to the present invention, as shown in FIG. 1, in the mixer 1, a plurality of spiral blades 3 and 4 are joined to the inner peripheral surface of the passage tube 2. The blade 3 is twisted to the right (clockwise) by 90
° twisted. The blade body 4 is twisted leftward (counterclockwise) by 90 °. Further, as shown in FIGS. 2 and 3, the central portion of the mixer 1 has openings 6 and 7 with a constant width in the longitudinal direction. Further, space portions 5 are provided at a constant interval between the blade body 3 and the blade body 4. Furthermore, the blade body 3 and the edge of the blade body 4 are arranged alternately at right angles to each other with the space portion 5 interposed therebetween. The openings 6 and 7
May be straight or curved in the longitudinal direction. Further, it may be tapered with different opening cross-sectional areas. The number of blades 3 and 4 in the same twisting direction is not limited to two, and may be one or two or more. Further, the mixer 1 may be configured by arranging the blade bodies 3 and the blade bodies 4 continuously adjacent to each other and alternately without providing the space portion 5 between the blade bodies 3 and 4. .. The twisting angles of the blades 3 and 4 are not limited to 90 ° and can be set arbitrarily. According to the present invention, when two or more kinds of fluids FA and FB flow into the mixer 1, some of the fluids flow while rotating clockwise along the blade body 3 joined in the passage tube 2, The fluid merges in the space portion 5, and a part of the other fluid undergoes a shearing action in the longitudinal direction of the opening 7 of the blade body 3. Further, the merged fluids FA and FB are divided at the upstream edge of the blade body 4 so that a part of the fluid flows while rotating counterclockwise along the blade body 4, and likewise, of the blade body 4. The opening 7 receives a shearing action. As described above, the two or more kinds of fluids FA and FB are stirred and mixed in the mixer 1 with high efficiency without causing troubles such as adhesion, retention and blockage while repeating division, merging, dislocation and shearing action. It Further, in the manufacturing method of the present invention, first, the spiral blades 3, 4 are bonded or welded to a predetermined position on the inner peripheral surfaces of the divided semi-cylindrical passage tubes 2a, 2b. Then, the semi-same tubular passage tubes 2a and 2b are joined to each other at the dividing surface 8 by welding or the like. In this case, the divided surfaces 8 may be joined and fixed by means such as a fastening tool so that they can be opened and closed without being welded to each other. The blades 3 and 4 are easily manufactured by means of forging, casting, injection molding or the like. In this way, the high performance static fluid mixer 1 can be manufactured very easily. Further, when the inner surface of the mixer is coated with rubber, plastics, ceramics or the like, the semi-cylindrical passage pipes 2a, 2b are provided.
The inner surface and the surfaces of the joined blades 3 and 4 can be easily covered by a means such as coating, thermal spraying or vapor deposition. In this way, a static fluid mixer having excellent wear resistance and corrosion resistance can be easily manufactured at low cost.

[0006]

EXAMPLES Next, examples of the static fluid mixer according to the present invention will be described more specifically. FIG. 4 is a schematic system diagram when the static fluid mixer of the present invention is used for mixing concrete and a quick-setting admixture. cement,
Concrete consisting of gravel, water, etc. is pumped through the concrete pump 9 through the concrete supply line 10 into the static fluid mixer 14 by a fixed amount. On the other hand, the quick-setting agent that solidifies the concrete in a short time is pressure-fed into the mixer 14 from the quick-setting agent tank 11 through the quick-setting agent pump 12 and the quick-setting agent supply line 13. In the mixer 14, the concrete and the quick-setting agent that have been pressure-fed are continuously stirred and mixed by repeating the splitting, merging, shifting, and shearing actions by the spiral right and left twisted blade bodies 3 and 4 having openings. Thus, a mixed composition of homogeneous concrete and a setting agent can be produced. In this way, when applied to the mixing of concrete and the quick-setting admixture, the blade bodies 3 and 4 in the mixer 14 have a simple shape and therefore have a small flow resistance, and since there is no stagnation portion, the retention of concrete, There is no trouble due to blockage, and highly efficient mixing is possible. Furthermore, according to this manufacturing method, since the required amount can be mixed immediately before use, the loss of raw materials is reduced. When this mixed composition is used for spraying, it cures immediately after spraying. Therefore, the sprayed concrete layer can be thickly constructed, and the splashing of the concrete from the sprayed surface is reduced, so that the loss amount of the concrete is reduced.
And the working environment also improves. Furthermore, by joining with a means such as a flange so that the joining surface of the passage pipe can be removed, the inside of the mixer after use can be easily washed. In addition, rubber, plastics, which improve wear resistance,
The coating treatment with ceramics or the like can be easily performed. The application according to the present invention is not limited to the above-mentioned examples, but an admixture or a fluidizing agent for producing dense concrete, a chemical agent for preventing rusting of reinforcing bars, a chemical agent for suppressing dust generated during spraying work, etc. Is also available. Further, it can be used for continuous spraying method of resin mortar, production of lightweight cellular concrete, solidification of sewage sludge, transportation of slurry of earth and sand, transportation of mixed fuel slurry of coal and heavy oil. FIG. 5 is a schematic system diagram when applied to the mixing of iron powders having different particle diameters using the mixer of the present invention. The iron powders having different particle diameters are supplied from the hoppers 15 and 16 through the powder quantitative feeders 17 and 18 to the hoppers 19, respectively, and supplied to the hopper 19 by gravity drop. While each iron powder falls in the mixer 20 by gravity, it is continuously stirred and mixed by repeating the division, merging, dislocation, and shearing action by the spiral blade body provided in the passage tube. According to the present invention, according to the customer's specifications, iron powder with different particle size distribution,
It can be easily and continuously manufactured in a short time. In this case, by using a large number of raw material hoppers, it is possible to easily produce iron powder having a variety of particle size distributions. Further, since power for mixing is not required, the energy saving effect is high and the volume of the mixer is small. Furthermore, since the mixture can be continuously mixed in a closed system, it is possible to prevent environmental pollution due to dust scattering and prevent contamination of the mixed substance from the outside. Furthermore, by performing Teflon lining inside the mixer, it can be used for mixing powder particles having strong adhesion. In addition, the method of supplying the powdery or granular material to the mixer is not limited to the gravity drop method, but may be pneumatically transported and supplied to the mixer for use.

[0007]

INDUSTRIAL APPLICABILITY According to the present invention, a highly viscous substance, powder,
A static fluid mixer that can be used for mixing concrete and the like, has excellent wear resistance and corrosion resistance, and is easy to maintain can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a static fluid mixer according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of the fluid mixer of the present invention.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a system diagram of mixing concrete and a quick-setting admixture, which is an application example of the static fluid mixer of the present invention.

FIG. 5 is a system diagram of mixing of iron powders having different particle diameters.

[Explanation of symbols]

 1, 14, 20; static fluid mixer 2, 2a, 2b; passage tubes 3, 4; blade body 5; space portion 6, 7; opening portion 8; split surface

Claims (3)

[Claims] 1. A static fluid mixer comprising: a passage pipe through which a fluid flows; and a plurality of blades that spirally rotate on an inner peripheral surface of the passage pipe. 2. The inner surface of the passage tube and the surface of the blade body are
The static fluid mixer according to claim 1, which is coated with rubber, plastics, or ceramics. 3. A step of joining a spiral blade to the inner peripheral surface of the passage tube divided into a plurality of pieces in the longitudinal direction, and a step of joining the divided surfaces of the passage tube. A method for manufacturing a static fluid mixer, comprising: