JPS5820297A - Aerator - Google Patents

Abstract

PURPOSE:To inhibit the tie-up of foreign matter in a passage, by forming a plurality of independent protuberances, projecting toward the passage, at one of inner and outer casings, and providing the protuberances with sparger holes for spraying oxygen-contg. gas. CONSTITUTION:When an underwater motor 5 is driven, a liquid is purified. In this case, sparger holes 31 are formed at the protuberances 30 of an inner casing, so that foreign matter is not stagnated unlike a conventional sparger. Even if the foreign matter is stagnated, the foreign matter is let flow by a liquid stream since the protuberances are smoothly formed. Consequently, the sparger holes 31 and a passage 8 are not plugged by the foreign matter. In addition, since the inner casing 6 doubles as a gas chamber 24, the constitution is simplified without necessity of a sealing means or the like. Moreover, it is enough to open a main supply passage 40 to the gas chamber 24, so that piping can be easily done.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an all-in-one device in which flow channels are formed in the walls of inner and outer casings, and oxygen-containing gas is injected into the flow channels.

Various such aeration devices are known. For example, a typical conventional aeration device B shown in FIG. It is designed to be hung and installed on the bottom of the treatment tank. Since the warm-up device 1fB is thus used in liquid, the submersible motor 5 is used as the motor of the drive unit A, and the impeller 4 is rotationally driven by the submersible motor 5. The casing part C consists of an inner casing 6 and an outer casing 7, both casings 6.7
A flow path 8 is formed in the darkness. Both casings 6.7 are flared downwards.

The aeration device B configured in this way has a submersible motor 5.
When activated, the blades 114 are driven to rotate, and the liquid to be treated is sucked in through the suction port 9 above the channel 8, and then discharged radially outward through the discharge port 10.

A suitable number of aeration tubes 11 protrude from the flow path 8, and oxygen-containing gas such as air supplied from the supply tube 12 is injected from the aeration tube 11 into the liquid to be treated via an annular collecting tube 13. It has become.

By the way, in the conventional blowing device having such a structure, the air diffuser 11 protrudes into the flow path 8, so foreign matter such as dust in the processing liquid gets caught in the air diffuser 11 and blocks the flow path 8. It also has the disadvantage that manufacturing a pipe-shaped air diffuser requires drilling a number of holes and performing 7-lunge welding, and installation requires time and effort such as machining the surface. Ta. Furthermore, since the air diffuser 11 is installed at a location where the upper casing 7 is curved inward as shown in the figure, installation at this curved portion is difficult to process, and also requires multiple air diffuser pipes 11. When attaching to the collecting pipe 13, welding was performed to match the actual item, resulting in poor workability.

Therefore, an object of the present invention is to provide a one-shot device that does not allow foreign matter to get caught in the flow path and is easy to manufacture and process.

In addition, in conventional aeration equipment of this type, the compressor or blower was used as a supply source of oxygen-containing gas, which was connected to the aeration pipe, so when the compressor or blower stopped, the pressure inside the supply pipe decreased. However, there is a drawback that the liquid to be treated flows back into these pipes, and foreign matter in the liquid blocks the pipes. In particular, when the gas injection holes are made into many small holes in order to disperse the gas into the liquid over a wide range, they tend to become clogged. Therefore, another object of the present invention is to provide and provide an aeration system that does not cause backflow of the liquid to be treated even when the compressor or blower is stopped.

According to the present invention, the outer casing or the inner casing is provided with a protrusion projecting toward the flow path, and the aeration holes are formed in the protrusion. Also, a check valve is provided in the main supply pipe for oxygen-containing gas.

The present invention will be described in detail below with reference to FIGS. 2 to 4.

In FIG. 2, the same components as those of the conventional one-shot device shown in FIG. 1 are denoted by the same reference numerals.

Both casings have a trumpet shape, and the diameter increases downward, and the liquid to be treated is discharged radially outward in an oblique radius. This is the same as the conventional example.

According to the present invention, as shown in FIG.
It has a portion 23 bent radially inward at its lower end, and a gas chamber 24 surrounded by the ceiling portion 22, the curved portion 21, the bent portion 23, etc. It is formed. Further, the inner casing 6 is provided with a plurality of mounting seats 25 (four in the illustrated embodiment), and these mounting seats 25 allow the inner and outer casings 6.7
are integrated by screwing bolts into bolt holes 26 via appropriate brackets. This bracket serves to restrict the discharge port and give a flow velocity to the discharge flow. Further, a notch 27 is formed in a part of the circumference of the inner casing, and a main supply pipe 40, which will be described later, opens into the air chamber 24 through this notch 27. As shown in FIGS. 3 and 4, a plurality of protrusions 30 that smoothly protrude toward the flow path 8 are formed in a part of the curved portion 21 of the inner casing 6 so as not to be continuous on the circumference. has been done. These protrusions 3
0 are circumferentially arranged at equal distances from the center O of the inner casing 6 when viewed in plan.

A diffuser hole 31 is formed in each of these protrusions 30 . 'According to the present invention, the processing of the diffuser holes can be easily performed. That is, as shown in FIG. 4, the slit-shaped air diffusion holes 31 are formed in each of the protrusions 30 simply by rotating the inner casing 6 with a lathe or the like and applying the tool 32 to the protrusions. In the illustrated embodiment, a plurality of protrusions 30 are formed on the inner casing 6', but it is clear that the protrusions 30 may be provided on the outer casing 7.

A main supply pipe 40 for supplying an oxygen-containing gas, for example, air, to the gas chamber 24 has a lower end 41 bent into an abbreviated shape. The terminal end portion 42 extends into the air chamber 24 formed by the inner casing 6 and opens above the air diffuser hole 31 . Further, the upper part of the main supply pipe 40 extends horizontally above the liquid surface W to be treated, and is connected to a high pressure source 43 such as a compressor or a blower. In the illustrated embodiment, the check valve 44 has a horizontally extending portion 45.
It is provided in εX.

The aeration device according to the present invention is configured as described above,
When the underwater motor 5 is started, the liquid is purified as described above. According to the present invention, since the air diffuser hole 31 is formed in the protrusion 30 of the inner casing, unlike the conventional air diffuser pipe, foreign matter in the liquid to be treated does not get caught. Further, even if the foreign matter is caught, the protrusion is formed smoothly, so that the foreign matter will be washed away by the liquid flow and will not block the air diffuser hole 31 or the flow path 8. Further, since the air diffuser holes 31 can be formed by cutting, they can be formed more easily than the conventional pipe-shaped air diffusers 9 and 11 (FIG. 1), and the workability is good. Furthermore, since the inner casing 6 also serves as the gas chamber 24, the structure is simple and no sealing means or the like is required. The main supply tube 40 includes a gas chamber 24,
Since it is only necessary to open the main supply pipe 40, the piping becomes easy, and the main supply pipe 40 can be used as a guide to move the aeration apparatus main body in the vertical direction.

Further, according to the present invention, since the main supply pipe 40 is provided with the check valve 44, even if the high pressure source 43 becomes low pressure, the liquid level in the gas chamber 24 of the inner casing 6 will rise by a distance of 11h. (When gas is injected from the diffuser hole 31, the liquid level is below the diffuser hole by a distance equal to the head velocity loss at the diffuser hole.) Due to the action of the check valve, it will not rise any further. , are suspended at the position of the air diffuser hole 31. Therefore the main supply pipe 4
Since the position of the open end 42 of 0 is above the position of the air diffuser hole 31, there is no possibility that the liquid to be treated flows back into the supply pipe, and no blockage occurs.

The snow covering according to the present invention is carried out as described above, but
Various modifications are possible without being limited to this embodiment. For example, instead of providing the check valve 44 in the horizontal portion 45 of the main supply pipe 40, it is also possible to provide it in a portion submerged in the liquid, although this poses a management problem. Further, when the protrusion 30 is formed on the outer casing 7, it is necessary to separately provide a gas chamber although it is not shown.

[Brief explanation of the drawing]

Figure 1 is a side view partially showing a conventional aeration device;
The drawings are a side view similar to FIG. 1 showing an embodiment of the present invention, FIG. 3 is a plan view of the inner casing, and FIG. 4 is a cross-sectional side view of the inner casing, also showing the cutting state. 5... Submersible motor 6... Inner casing 7... Outer casing 8...
・Flow path 30... Protrusion 31...
・Air diffuser hole 40... Main supply pipe 44...
・Check valve patent applicant: Eifa Seisakusho Co., Ltd. 9- Figure 1 Figure 2 Figure 3 Figure 2 Be No. 4 WJ

Claims (3)

[Claims] (1) In aeration @ stomach, where a flow path for the liquid to be treated is formed between the inner and outer casings, and oxygen-containing gas is injected into the liquid in the flow path, either -Ba casing has a flow path side 1. An aeration device characterized in that a plurality of independent protrusions protruding from each other are formed, and diffuser holes for injection of oxygen-containing gas are formed in the protrusions. (2) The aeration device according to claim 1, wherein the casing in which the diffuser holes for injection of oxygen-containing gas are formed is an inner casing. (3) In an aeration device in which a flow path for the liquid to be treated is formed between the inner and outer casings, and an oxygen-containing gas is injected into the flow path to the liquid to be treated, one of the casings has a flow path toward the flow path side. A plurality of independent protrusions are formed, and diffuser holes for injection of oxygen-containing gas are formed in the protrusions, and a check valve is provided in the main supply pipe for supplying the oxygen-containing gas to these diffuser holes. An all-in-one device characterized by being interposed with.