JPH0312395Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to an aeration device.

(Prior Art) Conventionally, for example, as shown in FIG.
The water 102 is circulated by the pump 104, and the water 1
In a system for purifying 02 using a purifying device 106, there is a method in which the purifying action of the purifying device 106 is performed using aerobic microorganisms. In order to actively maintain the activity of such aerobic microorganisms, the bathtub 100
Alternatively, it is necessary to mix air into the middle of the pipes 108 and 110, that is, into the flow path.
For that purpose, an aeration device 11 as shown in FIG.
2 is used. This aeration device 112 is of a type that is attached to the water inlet 114 of the bathtub 100, and the water sent from the direction of arrow B flows through the inflow channel 1.
Since the front part of the tube 16 is tapered, the flow velocity increases and the pressure decreases. At this time, gas introduction path 1
Air is introduced into the air chamber 120 from 18,
The air in the air chamber 120 is mixed with the water 102 whose pressure has decreased, and the water 102 flows out from the outflow path 122 in the direction of arrow C.

An outflow portion 124 having an outflow path 122 is screwed onto the main body 126, and the amount of air mixed into the water 102 is adjusted by rotating the outflow portion 124 to change the volume of the air chamber 120. A gasket 128 is provided on the inner end surface of the outflow portion 124, and the opening 130 of the gas introduction path 118 is closed with the inner end surface of the gasket 128 when air is blocked.

(Problems to be solved by the invention) However, the above aeration device has the following problems.

When it is desired to stop air from entering the flow path, a gasket 128 provided on the inner end surface of the outflow portion 124 is used.
to close the opening 130 of the gas introduction path 118.
Therefore, the vicinity of the rim of the opening 130 and the gasket 12
Since the end faces of 8 are closed by surface contact, the pressure contact force is small and gaps are likely to occur. If a gap is created, air will enter through the gap. Therefore, there is a problem in that strong surface contact must be ensured to eliminate the gap between the two. In addition, the amount of air mixed in the air chamber 12
Since the volume is adjusted to 0, the outer periphery of the piston part 132 of the outflow part 124 and the packing 128 is connected to the inner wall 13.
4, there is a problem that the outflow portion 124 cannot be rotated smoothly due to the sliding resistance in addition to the screw resistance.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an aeration device that can reliably and easily isolate an air chamber from an inflow path and a fluid outflow path.

(Means for Solving the Problems) In order to solve the above problems, the present invention has the following configuration.

That is, an aeration device for mixing gas into a fluid in the middle of a flow path includes a main body provided with an air chamber inside, and a tip portion provided inside the main body on the fluid inflow side with respect to the air chamber. an inflow portion that protrudes into the air chamber and has an inflow passage formed so that its cross-sectional area gradually decreases in the direction of the air chamber; an outflow section with a distal end that can be protruded and retracted, and an outflow section that is provided with an outflow path that can be connected to the inflow path; When the passageway and the outflow passage are connected, the protruding tip mouth edge comes into contact with the air chamber of the outflow passage or the inflow passage, and the seal connects the inflow passage and the outflow passage airtight, and the gas is introduced into the air chamber. It is characterized by comprising a gas introduction part for introducing gas.

(effect) The operation will be explained with reference to FIG.

The outflow portion 42 is rotated to cause the inner end surface 52 of the outflow portion 42 to protrude into the air chamber 34. Then, the inner end surface 57 of the gasket 40 fitted over the tip 38 of the inflow part 26 protruding into the air chamber 34 and the outflow part 42
The inner end surfaces 52 of the two gradually approach each other and eventually come into pressure contact. Then, the inflow path 30 and the outflow path 44 are connected and hermetically sealed off from the air chamber 34.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the configuration will be explained.

FIG. 1 shows a sectional view of an embodiment of the aeration device 10 attached to the water inlet 14 of the bathtub 12.

In the figure, 16 is a main body, and a female thread 20 is carved on the inner circumferential surface of an opening 18 on the inflow side (left side in the drawing). Similarly, a female thread 24 is also formed on the inner peripheral surface of the opening 22 on the outflow side (right side in the drawing).

Reference numeral 26 denotes an inflow portion, which has a male threaded portion 28 carved on its outer periphery and is screwed into the inflow side opening 18 of the main body 16 . When screwing the inflow part 26, the male thread part 2
8 through a water leakage prevention tape (not shown).

Reference numeral 30 denotes an inflow passage, which is a passage through which water flows into the main body 16, and is formed in a tapered portion 32 whose cross section gradually narrows toward the front (to the right in the drawing). The space between the inflow part 26 and the main body 16 is an air chamber 34, and gas is sent to this air chamber 34 through a gas introduction path 36, which is a gas introduction part bored in the inflow part 26. A tip 38 of the inflow portion 26 protrudes into the air chamber 34, and a packing 40 made of an elastic material such as rubber is fitted around the outer periphery. Water is sent to the inflow portion 26 from the direction of arrow A via a return path (not shown).

Reference numeral 42 denotes an outflow portion, in which an outflow passage 44 is bored in the center, and a male threaded portion 46 is carved in the outer periphery. The outflow portion 42 is screwed into a male threaded portion 50 carved on the inner circumferential surface of a connecting portion 48 provided inside the main body 16 in a double cylindrical shape. Therefore, by rotating the outflow portion 42, the inner end surface 52 of the outflow portion 42 can protrude into and out of the air chamber 34. The inner diameter of the opening 54 on the inner end surface 52 of the outflow portion 42 is
The outer diameter of the inner end surface 56 of the tip portion 38 of the inflow portion 26 is slightly larger than the outer diameter of the inner end surface 56 of the tip portion 38 of the inflow portion 26. Pressure welding is possible.

Reference numeral 58 denotes a fixture, which is screwed onto the outflow side opening 22 of the main body 16, and clamps and fixes the aeration device 10 to the water inlet 14 of the bathtub 12 via rubber gaskets 60, 62.

The operation of the aeration device 10 configured in this way will be explained.

Inflow path 30 from the direction of arrow A from a return pipe (not shown)
water is sent to At the same time, gas is fed into the gas introduction path 36 via the tube 64 by an air feeding means (not shown).

The flow velocity of water entering the inflow path 30 increases at the tapered portion 32, and the water pressure decreases at the outlet of the inflow path 30 compared to the inlet of the inflow path 30. Therefore, the air chamber 34
The gas inside is sucked into the water from all around the water flow and mixed in. The amount of mixed gas is determined by the inner end surface 5 of the outflow portion 42.
2 and the inner end surface 56 of the tip 38 of the inlet 26 protruding into the air chamber 34. The larger the value of x, the larger the amount of gas mixed in. The gas-mixed water is sent into the bathtub 12 via the outflow path 44.

If you want to stop mixing gas into the water, rotate the outflow part 44 and insert the inner end surface 52 into the gasket 40.
is pressed against the inner end surface 57 of. Then, since the inner end surface 52 of the outflow portion 42 has a thinner mouth edge, the gasket 4
The pressure acting on the inner end surface 57 of the outflow portion 42 becomes higher, the inner end surface 52 of the outflow portion 42 is pressed against the packing 40, and there is no gap, and the inflow path 30 and the outflow path 44 are
It is airtightly isolated from the air chamber 34, and air mixing into the water is stopped.

Various preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-mentioned embodiments.For example, the gas introduction part may be provided on the main body side, without departing from the spirit of the invention. Of course, many further modifications can be made within the range.

(Effect of the invention) When the aeration device according to the invention is used, the pressure contact force between the inflow part and the packing is strong, so when it is desired to stop the mixing of gas into the liquid, it is necessary to reliably connect the inflow path and the outflow path airtightly. can. Furthermore, when moving the inflow section to adjust the gas mixture path, only the frictional resistance of the threaded portion due to the screwing is generated, so that it can be easily moved.

[Brief explanation of the drawing]

Fig. 1 is a side cross-sectional view showing the installation state of an aeration device according to an embodiment of the present invention, Fig. 2 is an explanatory view showing a purification system with the aeration device attached, and Fig. 3
The figure is a side sectional view of a conventional aeration device. DESCRIPTION OF SYMBOLS 10... Aeration device, 16... Main body, 26... Inflow part, 30... Inflow path, 34... Air chamber, 36...
...Gas introduction path, 38...Inflow section tip, 40...
Patsukin, 42...outflow section, 44...outflow path.

Claims (1)

[Scope of Claim for Utility Model Registration] An aeration device for mixing gas into a fluid in the middle of a flow path, comprising: a main body provided with an air chamber inside; There is an inflow section in which a tip protrudes into the air chamber and an inflow path is formed so that the cross-sectional area gradually decreases in the direction of the air chamber; an outflow section with a tip end protruding into and out of the air chamber and an outflow path that can be connected to the inflow path formed therein; and end surfaces of the inflow path or the outflow path on opposing sides. a gasket, which is disposed in the inflow passageway and the outflow passageway, and when the inflow passageway and the outflow passageway are connected, the protruding tip mouth edge comes into contact with the air chamber of the outflow passageway or the inflow passageway, thereby airtightly connecting the inflow passageway and the outflow passageway; An aeration device comprising: a gas introduction section for introducing gas into the air chamber.