JPS5913248B2 - pipe mixer - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a flow type non-stirring mixer with extremely low pressure loss, and in particular, to an excellent product that has good workability and can be reduced in cost. be.

Traditionally, non-stirring type pipe mixers have been used because of their space and efficiency advantages, such as being able to continuously mix the fluid to be treated between the valley plant equipment by simply interposing it between each plant equipment. Hiro< Recruitment is being carried out.

As is well known, since the seed pipe mixer mixes, divides, etc. the flow by providing a bulkhead or a variable current plate against the flow, the pressure drop before and after the pipe mixer increases. The problem was how to reduce the pressure loss.

As a pipe mixer based on the prior art, for example, a static mixer manufactured by Kenix Co., Ltd. has been adopted as a device that effectively solves the above-mentioned problems.

As is well known, the theoretical basis of this static mixer is that the alternating current plates of each unit installed in the duct are shaped like a single plate with both ends bent 900 degrees. However, considering the above-mentioned bending process from the viewpoint of material mechanics, it is found that due to the bending process, the workpiece plate is subjected to a compressive action near its center and a tensile action near its side edges. As far as it is concerned, apart from small diameter pipe units, large diameter pipe mixer units have the drawback that they are almost impossible to press, sheet metal, etc. .

Therefore, in molding the unit of the large-diameter pipe mixer, it is generally necessary to go through complicated processing such as casting, which has the disadvantage of being extremely expensive. 20Also, there is also a mixing blade equipped with a fan as shown in Japanese Utility Model Publication No. 35-8955, but this type of blade rotates the fan and does not involve a stirring action. It also had the disadvantage of requiring separate power for that purpose.

25 In view of the problems of the pipe mixer based on the prior art, the purpose of the present invention is to eliminate the above-mentioned drawbacks and eliminate the disadvantages, as well as to create an excellent product with less pressure loss and rich workability. The purpose of the present invention is to provide a pipe mixer with a new construction.

30 The structure of the present invention in accordance with the above object is such that in a pipe mixer, the current transformation plate of the mixing unit installed inside the duct having a circular cross section is in the expanded state, that is, in the state of the processed original plate, so that the outer periphery forms a parabola. The unit is formed by only bending by bending the curved surface 35 times along the directrix of the parabola against the flow direction so that the outer peripheral edge comes into contact with the inner surface of the duct when curved. The interior of the duct can be easily defined, and when mixing the fluid to be treated,
The current of the fluid to be treated is smoothly changed by the balanced current changing plate of the mixing unit while being perpendicular to the directrix, and then in the next stage unit, the current changing plate of the previous stage is used. The gist of this is that the flow is transformed in the opposite direction by a symmetrical transformation surface, and the process is repeated to mix the mixture.

Next, embodiments of the present invention will be described below based on the drawings.

In Fig. 1, reference numeral 1 denotes a pipe mixer that is appropriately installed between plant equipment, etc., and the figure shows a part of it. A plurality of units 3 are installed inside.

The mixing unit 3 is made up of a four-leaf current variable plate 4 fixedly attached to a shaft 5, and the current variable plate 4, in its unfolded state as shown in FIGS. 2, 3, and 9, Each outer peripheral edge 7 that contacts the inner surface 6 is formed to form a parabola It is curved against A.

Further, the mixing unit 3' following the mixing unit 3 is fixed to the shaft 5 so that its curved direction is symmetrical and the phases of the current changing plates 4 are at the same position. Furthermore, the next mixing unit 3 is fixed to the shaft 5 in the same phase as the mixing unit 3 described above. To form the pipe mixer 1 having the above configuration, shearing is performed in the unfolded state as shown in FIG. The mixing units 3, 3', etc. thus formed can be alternately installed in the duct 2 by pressing, so that it is extremely easy to form a current converting unit particularly for a large-diameter duct. In the above configuration, when several types of liquids to be treated are mixed in advance and fed under pressure to the pipe mixer 1, the liquids to be treated are mixed in the mixing unit by the respective current changing plates 4. Then, by the current transformation curved surface 8 along the lines α, α, etc. parallel to the directrix λ of the parabola on the outer peripheral edge 7 of the current transformation plate 4, the current transformation plate 4 is arranged in a quadratic plane so as to be orthogonal to the directrix λ. The flow of the liquid to be treated, which is current-transformed and not transformed three-dimensionally but with a small resistance, is directed to the back side of the current-variable plate 4 in the next phase of the current-variable plate 4. Flow into.

Then, the liquid to be treated that has flowed into the rear side flows through the current changing plate 4 of the next phase with a small pressure loss without generating back pressure, and moves to the next stage AC unit 3', and is transferred to the mixing unit 3. The current is transformed in the reverse direction by the current variable plate 4 in the second phase in the same manner as in the previous mixing unit 3, and the rear surface of the current variable plate 4 in the next phase of the mixing unit 3' is The mixing unit 9 is moved to the subsequent unit 3'' etc. while gradually increasing the mixing degree.In addition to the above embodiment, as shown in Figs. 10, and in that case as well, in order to make the outer peripheral edge 12 of the current changing plate 10 contact the inner wall surface 11 of the duct, the line α passing through the large diameter of the duct
The outer circumferential edge 12 is formed into a parabola so that the point ' is parallel to the parabolic directrix, and the current variable plate 10 is formed by a curved process parallel to the directrix.

Furthermore, as another embodiment, the mixing unit 13 may be constructed from a two-leaf current transformation plate 14 as shown in FIGS. Board 14
In order to make the outer peripheral edge 17 of the tag abut against each other, the outer peripheral edge 17 is formed into a parabola so that the line α passing through the large diameter of the tag opening 5 is parallel to the directrix of the parabola. The current changing plate 10 may be curved parallel to the line so that the current changing direction is alternately reversed around the shaft 18. In the above embodiment, each mixing unit 3, 13, etc. is fixed to the shaft 5, 18, etc.;
, 18, etc., the posture of the mixing units 3, 13, etc. can be maintained by the outer peripheral edges 7, 17, etc.

As described above, according to the present invention, in a pipe mixer that is installed between plant equipment and performs continuous mixing of gas-liquid, liquid-liquid, solid-liquid, etc., a plurality of mixing devices are installed in a duct with a circular cross section. When forming a unit such that each mixing unit consists of at least two current transformation plates so that the current transformation curved surface of the current transformation plates opposes the flow direction, the current transformation plates of each mixing unit are mutually connected to each other. A symmetrical curved arrangement is made, in which case the current transformation plate is formed so that its outer peripheral edge forms a parabola in the unfolded state, and is curved along the directrix to come into contact with the inner surface of the duct. Since the above-mentioned mixing unit molding can be done by shearing, pressing, etc. in one piece,
Moreover, since it can be mass-produced and can be processed very easily, it has the advantage of being inexpensive.

In addition, since the plate material is simply curved and used, and the direction of the curve is also along the directrix of the parabola, the flow of the liquid to be treated is also created in a quadratic plane, causing disturbance. , without creating vortices, etc., and without creating back pressure on the mixing unit.
There is also an economical advantage that the pump for transferring the liquid to be processed is also required to have a small output.

Furthermore, since the current transformation curved surfaces of the current transformation plates of each unit are arranged alternately so that they are in opposite directions, the flow of the liquid to be treated can be reversed without creating back pressure, thereby minimizing pressure loss and causing reverse current transformation. This allows for highly efficient mixing.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an explanatory view of an assembled part, FIG. 2 is an explanatory expanded view of the mixing unit, FIG. 3 is an explanatory longitudinal cross-sectional view, and FIGS. Fig. 4 is a developed explanatory view of a three-lobed mixing unit, Fig. 5 is an explanatory longitudinal cross-sectional view, and Fig.
, 8 show still another embodiment, FIG. 6 is a developed explanatory view of the two-leaf mixing unit, FIG. 7 is an explanatory longitudinal cross-sectional view, and FIG. 8 is an explanatory view of the assembled part. It is an explanatory diagram of the flow plate formation principle. 2, 15... Duct, 3, 13... Mixing unit, 4, 10, 14... Current transformation plate, 8.
...Current transformation surface, 1... Pipe mixer, 7,
12, 17...outer edge, λ... directrix,
6, 11, 16...Inner surface of the duct.

Claims (1)

[Claims] 1. In a pipe mixer in which a plurality of mixing units installed in a duct having a circular cross section each consist of at least two current transformation plates, and the current transformation plates have a current transformation curved surface against the flow direction, each of the above-mentioned mixing The current variable plates of the units are arranged in an inverted relationship with each other, and furthermore, the current variable plates are formed so as to form a parabola at the outer peripheral edge in the expanded state, and are curved along the directrix. A pipe mixer, characterized in that the mixer is formed so as to come into contact with the inner surface of the duct.