JP2004016970A - Pipe for agitation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe for agitation through which two or more kinds of fluids pass while being agitated and which prevents a short-cut of the fluids and can agitate them effectively. <P>SOLUTION: An agitation element 2 is composed of the a first spiral 21 which revolves the fluids spirally in one direction around the axis in the approximately entire length strip 1 of a housing and a second spiral strip 22 which is installed on the peripheral side of the strip 21 while being wound and revolves the fluids spirally in another direction around the axis in the approximately entire length 1 of the housing. The outer fringe part of the first strip 21 and the inner fringe part of the second strip 22 are fixed while being caught mutually. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a stirring pipe for allowing a plurality of types of fluids to flow while stirring.
[0002]
[Prior art]
Conventionally, as a stirring pipe for allowing a plurality of kinds of fluids to flow while stirring, a pipe-shaped housing 101 is inserted into the housing 101 over substantially the entire length in the axial direction as shown in FIG. And a stirring element 102 fixed as required.
[0003]
The conventional stirring element 102 includes a plurality of torsion pieces 121 formed in one direction around the axis of the housing 101 and a plurality of torsion pieces 122 formed in the other direction alternately in the axial direction. The plurality of fluids M1 and M2 flowing from one end opening 101a of the housing 101 are swirled in one direction as shown by an arrow C in FIG. By turning in the opposite direction as shown by the arrow d and repeating this, a stirring action is given and the housing 101 is caused to flow out from the other end opening 101b.
[0004]
In the above-mentioned conventional stirring pipe, the twisting piece 121 for turning in one direction and the twisting piece 122 for turning in the other direction must be alternately inserted into the housing 101 as the stirring element 102, so that the assembling work is complicated. There was a problem that. In addition, since the fluids M1 and M2 flowing into the housing 101 are alternately changed into a one-way swirling flow and another direction swirling flow, the direction change hinders the flow, and the flow time in the housing 101, that is, the agitation time. There is also a problem that the time spent for this is increased.
[0005]
As a solution to the above-mentioned problem in the conventional stirring pipe, as shown in FIG. 7, the present applicant spirally rotates the fluids M1 and M2 in one direction around the axis X over substantially the entire length of the housing 201. A spiral strip 221 to be wound, and a spiral cord wound around the outer circumference of the spiral strip 221 to spirally rotate the fluids M1 and M2 in the other direction around the axis X over substantially the entire length of the housing 201. The body 222 was developed and has already been registered as a utility model (Japanese Utility Model Application No. 5-25992).
[0006]
In this newly developed stirring pipe, a plurality of types of fluids M1 and M2 flowing into the housing 201 are guided by the spiral strip 221 on the inner peripheral side a thereof and are directed in one direction around the axis X. A swirling flow is formed, and the outer peripheral side b of the fluids M1 and M2 is guided by the spiral cord body 222 to form a swirling flow around the axis X in the other direction. Therefore, the fluids M1 and M2 are stirred by interference between the inner peripheral side and the outer peripheral side, and the continuity of the swirling flow in the housing 201 is maintained, so that the stirring time is reduced. In addition, there is an advantage that the spiral band plate 221 and the spiral cord body 222 can be easily assembled simply by being integrated and inserted into the housing 201.
[0007]
[Problems to be solved by the invention]
However, in the illustrated example of the newly developed stirring pipe, the width of the outer spiral cord 222 is considerably narrower than that of the inner spiral strip 221, and the outer peripheral portion of the spiral strip 221 is spirally connected to the outer spiral cord 222. Since the inner edge of the string 222 is only in point contact, the fluid flows (shortcuts) in a short-circuit manner through the gap near the contact portion between the spiral strip 221 and the spiral string 222. However, there is a problem that a sufficient stirring effect cannot be obtained depending on the type of fluid. Therefore, the present invention provides a stirring pipe that maintains the continuity of the swirling flow in the housing, is easy to assemble, hardly causes short-circuit flow of fluid, and can obtain an excellent stirring effect. It is an issue.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the present invention employs the following configuration. That is, the stirring pipe according to the present invention includes a pipe-shaped housing, and a stirring element that is inserted into the housing over substantially the entire length in the axial direction thereof and stirs a plurality of types of fluids that flow into the housing. A first helical strip for spirally rotating the fluid in one direction around the axis over substantially the entire length of the housing; and a stirring element provided in a state wound around the outer circumference of the helical strip. A second helical strip for spirally rotating the fluid in the other direction about the axis over substantially the entire length of the housing, and an outer edge of the first helical strip and a second helical strip. It is characterized in that the belt and the inner edge of the band plate are fixed to each other in a state where they are cut into each other.
[0009]
In this stirring pipe, the stirring element is constituted by a first spiral strip for rotating the fluid in one direction and a second spiral strip for rotating the fluid in the opposite direction. Since the outer edge of the spiral strip and the inner edge of the second spiral strip are fixed to each other in a state where they bite into each other, a large gap does not occur in the contact portion between the two and the fluid flows in both spiral strips. The swirl is sufficiently swirled by the strip, and both swirling flows effectively interfere with each other. For this reason, sufficient stirring is performed.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described. FIG. 1 shows a stirring pipe according to the present invention. The stirring pipe comprises a pipe-shaped housing 1 made of a corrosion-resistant metal material such as stainless steel, and an axial center inside the housing 1. And a stirring element 2 inserted over substantially the entire length in the direction. Flanges 3 and 4 are provided at both ends of the housing 1 in the X direction.
[0011]
The stirring element 2 is wound around a first spiral strip (inner spiral blade) 21 disposed on the axis X of the housing 1 and an outer peripheral portion of the first spiral strip 21. A second spiral strip (outer spiral blade) 22. In the illustrated example, the width w of the second spiral strip 22 is smaller than the width w of the first spiral strip 21. This is in order to obtain a good circulation state and to generate an effective swirling flow. However, if the widths of the first and second spiral strips are optimal according to the use conditions and the like. Good.
[0012]
The first helical strip 21 is formed by twisting a metal strip such as stainless steel around the axis X, and the first spiral strip 21 flows from an opening 1 a provided at one end of the housing 1. The fluids M1 and M2 are swirled around the axis. The second spiral strip 22 is also formed by twisting a metal strip such as stainless steel. The second spiral strip 22 is formed on the outer periphery of the first spiral strip 21. The fluid M1 and M2 are formed in a state of being spirally wound around the portion, and are configured to swirl the fluids M1 and M2 in a direction opposite to the second spiral strip 21.
[0013]
The second spiral strip 22 is wound around the outer periphery of the first spiral strip 21, and the outer peripheral portion of the first spiral strip 21 and the second spiral strip are connected to each other. The inner edge of the plate 22 is welded and fixed so as to bite each other. For this reason, the inner diameter of the second spiral strip 22 which is the outer spiral blade is smaller than the outer diameter of the first spiral strip 21 which is the inner spiral blade. Are partially duplicated. The amount of overlap, that is, the length t that bites into each other is usually not more than 1/3 of the width w of the second spiral strip 22, and depends on the size of the spiral strip. It is several mm (for example, about 2 to 6 mm). The point is that the size should be such that a shortcut is unlikely to occur.
[0014]
One end of the stirring element 2 is provided with a flange 5 as shown in FIGS. The flange 5 has a ring shape made of a plate material of the same material as the spiral strips 21 and 22, and a diametrical frame 6 is integrally formed in a hollow portion through which fluid flows. An end of the first spiral strip 21 is fixed to the frame 6 by welding.
[0015]
A cylindrical housing 1 is fitted outside the stirring element 2. The cylindrical housing 1 is integrally provided with outward flanges 3 and 4 at both ends, and the stirring element 2 is inserted from one end side where the flange 5 is not provided through one opening 1a. Is fixed to the outer surface of the flange 3 of the housing 1 by fixing means such as welding or bolts. As described above, since the two spiral strips 21 and 22 are fixed in a state where they bite each other, simply fixing one end of the stirring element 2 to the housing 1 allows the two spiral strips to be fixed to the housing 1. Strongly supported within.
[0016]
When a plurality of types of fluids M1 and M2 are caused to flow from the opening 1a provided at one end of the housing 1 in the stirring pipe P configured as described above, these fluids M1 and M2 are formed on the inner peripheral side thereof. The portion is guided by the first spiral strip 21 of the stirring element 2 as shown by an arrow a in FIG. 4 to form a swirling flow spirally swirling in one direction around the axis X of the housing 1. The outer peripheral portion of the seed fluids M1 and M2 forms a swirling flow guided by the second spiral strip 22 and swirled in the opposite direction about the axis X, as shown by the arrow b.
[0017]
While the inner peripheral side portion a and the outer peripheral side portion b of these plural kinds of fluids M1 and M2 spirally rotate in opposite directions and flow toward the other end, the inner peripheral side portion a and the outer peripheral portion b The side portions b interfere with each other, and both fluids are agitated and flow out of the opening 1b provided at the other end of the housing 1.
[0018]
The second spiral strip 22 is fixed in a state of being wound around the outer periphery of the first spiral strip 21, but the outer edge of the first spiral strip 21 and the second spiral strip are fixed to each other. Since the inner edge portions of the strip-shaped strips 22 bite each other, there is no gap between the contact portions of the strip-shaped strips 22 so that a short-cut occurs. Will be forced to interfere at this point. For this reason, effective stirring is performed.
[0019]
As shown in FIG. 5, for example, this stirring pipe P is interposed between ordinary pipe pipes P, P having no stirring element 2, and used for stirring and mixing a fluid. These pipes P, P are joined by bolts or the like in a state where the pipes P, P are butted with the gasket 10 interposed between the flanges 4, 3 provided at their respective ends. More precisely, the gasket 10 is overlapped between one flange 3 of the stirring pipe P and the flange 5 of the stirring element 2, and the gasket 10 is also overlapped between the flange 5 and the other flange 4. The five members 3, 10, 5, 10, and 4 are watertightly connected by bolts and nuts 25.
[0020]
The stirrer pipe P can be assembled simply by inserting the stirrer element 2 formed by combining the two spiral strips into the cylindrical housing 1 and fixing the same. Further, the fluid flowing into the housing flows to the other end of the housing while being swirled in the opposite directions by the two spiral strips 21 and 22, so that the flow is smoothly performed and the stirring time is unduly long. Is prevented. In addition, the two spiral strips 21 and 22 are formed in a shape that bites into each other, and the swirling flows in the opposite directions by the two spiral strips are forcibly caused to interfere at the contact portions of the two, so that the fluid is They are sufficiently stirred and mixed.
[0021]
The materials of the spiral strips 21 and 22 and the housing 1 are not limited to those described above, and can be appropriately selected from other materials having appropriate rigidity. The number of twists around, the twist angle, the number of turns, and the like can be appropriately set so as to obtain effective stirring.
[0022]
【The invention's effect】
As is clear from the above description, the stirring pipe according to the present invention includes a stirring element inserted into a pipe-shaped housing, a first spiral band plate located inside, and a first spiral band. Since it is composed of the second helical strip wound around the outer periphery of the plate, assembly can be performed simply by inserting the two into the housing as a single unit, and the assembling work can be simplified. Further, since the fluid flowing into the housing continuously flows over the entire length of the housing, the stirring time can be reduced without impairing the stirring performance. Furthermore, the stirring pipe of the present invention is fixed such that the outer edge of the inner spiral strip and the inner edge of the outer spiral strip are biting each other, and both are partially viewed in the axial direction. Because of the overlap, the short-cut flow does not occur at the contact portion between the two spiral strips, and the swirling flows are forcibly interfered with each other, so that effective stirring can be obtained.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view illustrating an embodiment of the present invention.
FIG. 2 is a view on arrow A of the stirring element.
FIG. 3 is a view on arrow B of the stirring element.
FIG. 4 is an explanatory diagram schematically showing a flow of a fluid.
FIG. 5 is an explanatory diagram of how to use a stirring pipe.
FIG. 6 is a longitudinal sectional view of a conventional stirring pipe.
FIG. 7 is a longitudinal sectional view of the improved product.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing 2 Stirring element 3 Flange 4 Flange 5 Flange 21 First spiral strip 22 Second spiral strip

Claims (3)

A pipe-shaped housing, and a stirring element inserted into the housing over substantially the entire length in the axial direction thereof to stir a plurality of types of fluids flowing into the housing. A first helical strip that spirals in one direction around the axis over its entire length, and a first helical strip wound around the outer circumference of the helical strip, the fluid flowing through the axial center over substantially the entire length of the housing. A second helical strip that is helically swiveled in another direction around the outer circumference of the first helical strip and an inner edge of the second helical strip. A stirring pipe which is fixed in a state. The stirring pipe according to claim 1, wherein the width of the second spiral strip is smaller than the width of the first spiral strip. The stirring pipe according to claim 1, wherein a flange is provided at one end of the stirring element, and the flange is fixed so as to overlap with a flange provided at an end of the housing.

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