JPH0687959B2 - mixer - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixer, and more particularly to a mixer obtained by mixing several kinds of fluids flowing in a flow path of a pipe while flowing in the pipe.

[Conventional technology]

Generally, a mixer is known in which a plurality of mixing elements are housed in the flow path of a tubular body, and several kinds of fluids flowing in the flow path are mixed by these mixing elements.

Conventional mixers of this kind are twisted right around the outside,
It has multiple mix increments with either a left-handed spiral wing. These mixing elements are arranged in series in the flow passage of the pipe in a right-handed twist and a left-handed twist, and the fluid flowing in the flow passage of the pipe body is subjected to the right-handed and left-handed inversion forces alternately, and its blades are rotated. It gradually mixes as it flows through the space.

[Problems to be Solved by the Invention]

However, in conventional mixers, one spiral blade
The number of blades is about one or two, and structurally, too many blades cannot be formed on the outer peripheral portion, so that there is a problem that the fluid mixing efficiency is not so good. In order to solve this, conventionally, many mixing elements are arranged in series in the flow path of the pipe body to repeat fluid mixing, but this increases the overall length of the pipe body and the mixer. There is a problem that it will lead to the increase in size.

Therefore, an object of the present invention is to solve the problems of the above-mentioned conventional techniques and to provide a mixer capable of significantly improving the mixing efficiency of fluids without increasing the overall length of the tubular body. .

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the invention according to claim 1 is a mixing element in which a mixing element is housed in a channel of a tubular body, and the fluid flowing in the channel is mixed by the mixing element. Has an inlet chamber communicating with the upstream side at its outer peripheral portion and an outlet chamber communicating with the downstream side at its inner peripheral portion, and its peripheral wall portion has an inlet chamber and an outlet chamber at axial intervals. There is at least two rows of communication holes that communicate with each other, and among the communication holes of each row, the first communication hole on the upstream side is perforated so as to impart the first direction turning force to the fluid, and the second communication hole on the downstream side. Is characterized in that it is perforated so as to apply a second direction turning force substantially opposite to the first direction turning force to the fluid.

The invention according to claim 2 has a third communication hole, which is located between the first communication hole and the second communication hole and which communicates the inlet chamber and the outlet chamber, in the peripheral wall portion of the mixing element, The third communication hole is characterized in that it is formed so as to impart a radial jet force to the fluid.

[Work]

According to the invention described in claim 1, the fluid flowing into the outlet chamber through the first communication hole on the upstream side receives the first direction swirling force in the vertical plane orthogonal to the flow in the flow path, and first, this process The fluid passing through the second communication hole on the downstream side is swirled in the second direction and sufficiently stirred in this process. It collides with the flow that has received the first-direction turning force, and acts so as to cancel this first-direction turning force, so that the flow in the outlet chamber becomes a laminar flow. Therefore, the fluid from the upstream side is sufficiently stirred and mixed,
It becomes a laminar flow and is discharged downstream.

According to the second aspect of the invention, the fluid that has passed through the third communication hole is ejected in the radial direction and collides with the fluid that is sufficiently stirred on the upstream side and flows. In this process, the fluids are diffused and mixed, and thus the mixing efficiency is higher than that described above because the fluids are diffused.

〔Example〕

Hereinafter, an embodiment of a mixer according to the present invention will be described with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a tubular body, and female threads 1a, 1a are formed at both ends of the tubular body 1 for connecting a pipeline. An annular seat portion 1b is integrally formed on the inner circumference of the tubular body 1, and is positioned in the annular seat portion 1b.
The individual mixing elements 2 are stored in order.

As is apparent from FIG. 2, this mixing element 2 is a member integrally having a collar portion 2a and a cylindrical portion 2b, and the outer peripheral portion of the collar portion 2a is fitted to the inner peripheral portion of the tubular body 1. Have been combined. Further, a sleeve 3 for regulating the interval between the mixing elements 2 is interposed between the mixing elements 2, and the outer peripheral portion of the sleeve 3 is fitted to the inner peripheral portion of the tubular body 1.

The mixing element 2 has an inlet chamber communicating with the upstream side on the outer peripheral portion thereof, and in this example, the inner peripheral portion of the tubular body 1 or the inner peripheral portion of the sleeve 3 and the outer peripheral portion of the tubular portion 2b. An annular inlet chamber 5 is formed between them. Further, the mixing element 2 has an outlet chamber communicating with the downstream side on the inner peripheral portion thereof, and in this example, an outlet chamber 7 having a circular cross section is bored inside the cylindrical portion 2b.

Three rows of communication holes 11, 12, 13 for communicating the inlet chamber 5 and the outlet chamber 7 are provided in the peripheral wall portion of the cylindrical portion 2b of the mixing element 2 at intervals in the axial direction. Of the communication holes in each row, the first communication hole 11 on the upstream side is drilled along the tangential direction of the inner circumference circle 15 as shown in FIG. 3, and the second communication hole 13 on the downstream side is As shown in FIG. 5, the inner circumferential circle 15 is bored substantially along the tangential direction and in a direction substantially opposite to the first communication hole 11. Further, as shown in FIG. 4, the third communication hole 12 located in the middle of the first and second communication holes 11 and 13 is bored substantially along the radial direction of the inner circumference circle 15.

Next, the operation of this embodiment will be described.

This kind of mixer is connected in the middle of the piping system, and several kinds of fluids supplied from the upstream side are mixed while passing through the three mixing elements 2 and discharged to the downstream side. It

More specifically, the supplied fluid is temporarily stored in the inlet chamber 5 and then discharged to the outlet chamber 7 through the three rows of communication holes 11, 12, and 13.

The fluid discharged into the outlet chamber 7 through the first communication hole 11 on the upstream side is first in the clockwise direction in the drawing as shown in FIG. 3 in the vertical plane orthogonal to the flow in the flow path 1c. It receives a directional turning force and is first thoroughly agitated in this process. Next, as shown in FIG. 4, the fluid that has passed through the third communication hole 12 is ejected in the radial direction of the inner circumferential circle 15, is sufficiently stirred on the upstream side, collides with the flowing fluid, and diffuses. Mixed.

As shown in FIG. 5, the fluid that has passed through the second communication hole 13 on the downstream side receives the second direction turning force in the counterclockwise direction in the figure, is sufficiently agitated in this process, and this flow is In the outlet chamber 7, it collides with the flow that has received the first-direction turning force on the upstream side, and acts so as to cancel the first-direction turning force.

Thus, according to this embodiment, the mixing element 2 is provided with three rows of communication holes 11, 12 and 13 extending in three directions. Through these three rows of communication holes, fluid agitation, diffusion, Since the mixing is performed, the mixing efficiency of the mixer is remarkably improved as compared with the conventional one. And according to this,
Since the flow toward the downstream side becomes a flow with little turbulence, there is an advantage that a device for laminarizing the flow is not required downstream of this mixer.

In this embodiment, the number of communication holes is 12 each, and the number of communication holes is 3, so that the total number of holes of one mixing element 2 is 36, and the fluid is mixed in 36 divisions. become. On the other hand, in the conventional case, the total number of spiral blades on the outer peripheral portion of the mixing element is at most two, so that one mixing element only divides the fluid into two parts.

As is clear from this comparison, in the present embodiment, the number of divided fluids is significantly increased, so that the mixing efficiency of fluids can be significantly improved as compared with the conventional one.
Therefore, the mixer can be manufactured extremely compactly.

In this embodiment, for example, if the number of communicating holes is n and the row of communicating holes is l, the total number of holes is n × l, and the fluid is mixed in n × l division. Become. That is, this mixer can easily improve the mixing efficiency by increasing the numbers of n and l.

If the number of mixing elements 2 is increased and m mixing elements 2 are housed in the tube body 1 in series, the total number of holes is n × l × m, but every time the mixing elements 2 pass through. Since the fluid is finely divided, the fluids are mixed in (n × l) m divisions in these processes. In this way, this mixer can dramatically improve the mixing efficiency by increasing the number of mixing elements 2.

The present invention has been described above based on the embodiment, but the present invention is not limited to this.

For example, the third communication hole 12 may be omitted. As described above, the third communication hole 12 causes the fluid to be ejected in the radial direction of the inner circumferential circle 15 and collide with the fluid flowing from the upstream side,
This is for diffusing and mixing this. Therefore, even if the third communication hole 12 is omitted, the first and second communication holes 1
As long as 1 and 13 are perforated, the diffusion process is eliminated, but the fluids can be mixed well and the mixed fluid with little turbulence can be discharged downstream.

〔The invention's effect〕

As is clear from the above description, according to the invention of claim 1, the mixing element has an inlet chamber communicating with an upstream side at an outer peripheral portion thereof and an outlet chamber communicating with a downstream side at an inner peripheral portion thereof. The peripheral wall portion has at least two rows of communication holes, which communicate with the inlet chamber and the outlet chamber, at intervals in the axial direction, and the first communication hole on the upstream side of the communication holes of each row. Is perforated so as to impart a first direction swirl force to the fluid, and the second communication hole on the downstream side is perforated so as to impart a second direction swirl force substantially opposite to the first direction swirl force to the fluid, Since the fluid supplied from the upstream side flows from the inlet chamber to the outlet chamber through the first and second communication holes, it is sufficiently agitated and mixed in this process, and the swirling forces in the first and second directions collide with each other to cause mutual stirring. Since the turning force is canceled out, it becomes a laminar flow and is discharged to the downstream side.

According to the second aspect of the invention, the peripheral wall portion of the mixing element is provided with a third communication hole which is located between the first communication hole and the second communication hole and which communicates the inlet chamber and the outlet chamber. Have,
Since the third communication hole is bored so as to impart a radial jet output to the fluid, the fluid ejected into the outlet chamber through the third communication hole collides with the flow to which the first direction swirl force is imparted. The fluids are mixed very efficiently because they are diffusively mixed.

[Brief description of drawings]

1 is a vertical sectional view showing an embodiment of the mixer according to the present invention, FIG. 2 is a front view of a mixing element, FIG. 3 is a sectional view taken along the line III-III of FIG. 2, and FIG. 4 is a sectional view of FIG. IV-IV sectional view, FIG. 5 is a VV sectional view of FIG. 1 ... Tube, 1c ... Flow path, 2 ... Mixing element, 3 ... Sleeve, 5 ... Inlet chamber, 7 ... Outlet chamber, 11
...... First communication hole, 12 ...... Third communication hole, 13 ...... Second communication hole.

Claims (2)

[Claims] 1. In a mixer in which a mixing element is housed in a flow passage of a tubular body, and the fluid flowing in the flow passage is mixed by the mixing element, the mixing element is connected to an outer peripheral portion thereof on an upstream side. At least two rows that communicate with the inlet chamber and the outlet chamber at intervals in the axial direction on the peripheral wall portion. Of the communication holes of each row, the first communication hole on the upstream side is bored so as to impart the first direction swirl force to the fluid, and the second communication hole on the downstream side.
A mixer characterized in that the communication hole is bored so as to impart a second-direction swirl force, which is substantially opposite to the first-direction swirl force, to the fluid. 2. The peripheral wall portion of the mixing element includes:
There is a third communication hole that is located between the first communication hole and the second communication hole and that communicates the inlet chamber and the outlet chamber, and the third communication hole imparts a radial jet output to the fluid. The mixer according to claim 1, wherein the mixer is perforated as described above.