JPS6119789Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for mixing two gases.

Conventionally, as shown in FIG. 1, a gas mixing device includes a first gas flow pipe 1 and a second gas ejection pipe 2 having a jet nozzle 2A disposed concentrically within the flow pipe 1.
There is also a device consisting of a stirring blade 3 disposed concentrically with the flow pipe 1 downstream of the jet pipe 2, but in this conventional device, the shape of the stirring blade 3 is complicated and expensive. There is a drawback. Furthermore, as shown in FIG. 2, there is a device in which a header 5 having an injection hole 4 is arranged concentrically with the flow tube 1 inside the flow tube 1, but in this conventional device, a large number of injection holes 4 are not formed. However, this case also has the disadvantage of being expensive.

Therefore, the present invention provides a gas mixing device that eliminates such drawbacks, and its feature is that the ejection port of the second gas ejection pipe is placed in the first gas flow pipe in a concentric manner with the flow pipe. A funnel-shaped cone, which is disposed downstream of the ejection pipe in the flow pipe, has an opening at one end that is smaller in diameter than the ejection port, and whose side wall extends outward from the opening at one end toward the opening at the other end. This is due to the fact that it is arranged concentrically with the flow pipe,
According to this configuration, the structure is extremely simple and inexpensive, and two types of gases can be completely mixed using the Karman vortex.

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. That is, the ejection port 2A of the second gas ejection pipe 2 is disposed in the first gas flow pipe 1 so as to be concentric with the flow pipe 1, and one end opening 6A is provided downstream of the ejection pipe 2 in the flow pipe 1. A funnel-shaped cone 6 is arranged concentrically with the flow pipe 1, and has a smaller diameter than the spout 2A, and the side wall extends outward from the opening 6A at one end toward the opening 6B at the other end. It is in.

In the above configuration, a part of the second gas ejected from the ejection port 2A of the ejection pipe 2 linearly enters the cone 6 from the one end opening 6A and continues as it is. Therefore, the inside of the cone 6 is in a reduced pressure state.
In addition, the remainder of the second gas spreads outward along the outer circumferential surface of the cone 6, and during this time, it is mixed with the first gas, and between the other end opening 6B of the cone 6 and the inner circumferential surface of the flow pipe 1. A Karman vortex is generated when the gas passes through the narrow ring-shaped space, and both the first and second gases are completely mixed.

The concentration distribution on the A-A cross section in Figure 3 is as shown in Figure 4a, and when the concentration distribution A outside the cone 6 and the concentration distribution B inside the cone 6 are combined, Figure 4b
become that way.

As described above, the gas mixing device of the present invention has an extremely simple structure, is inexpensive, and is capable of completely mixing two types of gases using Karma vortices.

[Brief explanation of the drawing]

FIGS. 1 and 2 are schematic vertical sectional views showing conventional examples, respectively. 3 and 4 show an embodiment of the present invention, FIG. 3 is a schematic vertical sectional view, and FIG.
Figures a and b are gas concentration distribution maps. 1...Flow pipe, 2...Ejection pipe, 2A...Ejection port, 6...Cone, 6A...One end opening, 6B...
...Other end opening.

Claims (1)

[Scope of utility model registration request] The ejection port of the second gas ejection pipe is disposed in the first gas flow pipe concentrically with the flow pipe, and one end opening on the downstream side of the ejection pipe in the flow pipe has a smaller diameter than the ejection port, and the side wall has a smaller diameter than the ejection port. A gas mixing device characterized in that a funnel-shaped cone that spreads outward from the opening at one end toward the opening at the other end is arranged concentrically with the flow pipe.