JPH057890A - Aerator provided with air suction adjusting mechanism - Google Patents
Aerator provided with air suction adjusting mechanismInfo
- Publication number
- JPH057890A JPH057890A JP19257991A JP19257991A JPH057890A JP H057890 A JPH057890 A JP H057890A JP 19257991 A JP19257991 A JP 19257991A JP 19257991 A JP19257991 A JP 19257991A JP H057890 A JPH057890 A JP H057890A
- Authority
- JP
- Japan
- Prior art keywords
- cover
- hollow shaft
- propeller
- bearing
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はプロペラの回転より生じ
る負圧を利用して空気を吸い込む自吸式曝気機に於て、
中空軸の軸受を汚水中の夾雑物にて閉鎖しないようにな
した吸気量調整機構付曝気機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-priming aerator which sucks air by utilizing a negative pressure generated by rotation of a propeller,
The present invention relates to an aerator with an intake air amount adjusting mechanism that prevents a bearing of a hollow shaft from being closed by contaminants in dirty water.
【０００２】[0002]
【従来の技術】下端にプロペラを取り付けた中空軸上端
にモータを接続し、かつこの中空軸をカバーで覆い、こ
のカバー下端に中空軸のプロペラを突出させ、かつこの
中空軸を軸受を介してカバーに回動自在に支持した自吸
式曝気機がある。これはモータにてプロペラを回転させ
ることによりプロペラ先端水域に負圧を発生させ、この
負圧を中空軸内より空気を吸入して水中に散気させるよ
うになしている。2. Description of the Related Art A motor is connected to the upper end of a hollow shaft having a propeller attached to the lower end, and the hollow shaft is covered with a cover. There is a self-priming aerator that is rotatably supported by a cover. In this system, a negative pressure is generated in the water area at the tip of the propeller by rotating the propeller with a motor, and this negative pressure sucks air from the hollow shaft and diffuses it into the water.
【０００３】[0003]
【発明が解決しようとする課題】従来の自吸式曝気機に
おいてその吸気量を調整するものとしてバルブを設け、
このバルブの開閉操作をしている。しかしバルブを閉じ
るとカバー内が負圧となり、このカバー内負圧に応じて
汚水がカバー下端より軸受を経てカバー内へ侵入してく
る。この時中空軸を軸支した軸受に汚水中に含有する夾
雑物等が付着し、軸受が閉塞され、モータに過負荷を与
えたり軸受を破損したりする。In the conventional self-priming aerator, a valve is provided to adjust the amount of intake air,
I am opening and closing this valve. However, when the valve is closed, the inside of the cover becomes a negative pressure, and sewage enters the inside of the cover through the bearing from the lower end of the cover according to the negative pressure inside the cover. At this time, foreign matters contained in dirty water adhere to the bearing that supports the hollow shaft, and the bearing is blocked, which may overload the motor or damage the bearing.
【０００４】本発明はカバーに設けた吸気量調整用のバ
ルブを閉じたとき、カバー内に生じる負圧によっても汚
水が中空軸の軸支用の軸受を通過せず、軸受の閉鎖が生
じないようになすことを目的とする。According to the present invention, when the valve for adjusting the amount of intake air provided in the cover is closed, the sewage does not pass through the bearing for supporting the hollow shaft and the bearing is not closed even by the negative pressure generated in the cover. The purpose is to do so.
【０００５】[0005]
【課題を解決するための手段】本発明は上記目的を達成
するためになしたもので、プロペラを下端に設けた中空
軸にモータを接続し、このプロペラを回転させてプロペ
ラ先端水域に発生する負圧を利用して中空軸に穿設した
吸気孔より空気を吹き込む曝気機に於て、前記中空軸を
覆い、かつ下端が水面下にあるようにしてカバーを設け
るとともにこのカバーには、水面上方位置に吸気量制御
弁を、水中部に差圧調整用孔を夫々設け、さらにこのカ
バーに中空軸支持用の軸受より上方位置にシール機構を
設けたことを要旨とする。The present invention has been made to achieve the above object. A motor is connected to a hollow shaft having a propeller at its lower end, and the propeller is rotated to generate in the propeller tip water area. In an aerator in which air is blown from an intake hole formed in a hollow shaft by using negative pressure, a cover is provided so that the hollow shaft is covered and the lower end is below the water surface. The gist of the present invention is that an intake air amount control valve is provided at an upper position, a differential pressure adjusting hole is provided at an underwater portion, and a sealing mechanism is provided at a position above the bearing for supporting the hollow shaft in the cover.
【０００６】[0006]
【作用】嫌気運転時、プロペラ先端水域に発生する負圧
にてカバー内に負圧が発生しても、シール機構より上方
で、かつ水中に開口した差圧調整孔より汚水がカバー内
に侵入し、これによりシール機構より下方にある軸受内
にはこの差圧の影響を受けない。このため軸受内を汚水
が流下することがなく、夾雑物にて詰まることがないの
で、円滑な運転が行える。[Operation] During anaerobic operation, even if negative pressure occurs in the cover due to the negative pressure generated in the water area at the tip of the propeller, sewage enters the cover above the sealing mechanism and through the differential pressure adjustment hole that opens into the water. However, as a result, the bearing located below the sealing mechanism is not affected by this pressure difference. Therefore, dirty water does not flow down in the bearing and is not clogged with foreign matters, so that smooth operation can be performed.
【０００７】[0007]
【実施例】以下本発明を図示の実施例にもとづいて説明
する。図において１は所要径と長さを有する中空軸で、
この中空軸１の上端にモータ２を接続し、下端には汚水
を撹拌曝気するのに適した形状を有するプロペラ５を取
り付けると共にこの中空軸１の下端を除いてほぼ全長を
覆うようにしてカバー３を配設し、このカバー３の上端
をモータ２のハウジングと固定する。The present invention will be described below with reference to the illustrated embodiments. In the figure, 1 is a hollow shaft having a required diameter and length,
A motor 2 is connected to the upper end of the hollow shaft 1, and a propeller 5 having a shape suitable for stirring and aerating sewage is attached to the lower end of the hollow shaft 1 and covers almost the entire length of the hollow shaft 1 except the lower end. 3 is provided and the upper end of the cover 3 is fixed to the housing of the motor 2.
【０００８】カバー３内の中空軸１で、常に水面上方位
置にあるようにして吸気口１Ｈを穿孔し、カバー下端部
に軸受６を設けて、この軸受６にて前記中空軸１の下部
を回動自在に支持するとともに、カバー下端より突出す
る中空軸下端外周に所望のプロペラ５を設ける。そして
このカバー３には常に水面より上方となる位置に弁取付
部８を穿設し、この弁取付部８に吸気量調整弁９を設け
るとともにカバーの水面より下方位置すなわち常に水中
にある位置に差圧調整孔７を穿設する。In the hollow shaft 1 in the cover 3, the intake port 1H is perforated so that it is always above the water surface, and a bearing 6 is provided at the lower end of the cover. A desired propeller 5 is provided on the outer periphery of the lower end of the hollow shaft which is rotatably supported and projects from the lower end of the cover. The cover 3 is provided with a valve mounting portion 8 at a position which is always above the water surface, and an intake amount adjusting valve 9 is provided at the valve mounting portion 8 and is located below the water surface of the cover, that is, at a position always under water. The differential pressure adjusting hole 7 is formed.
【０００９】さらにカバー３内には軸受６より上方位置
にシール機構４を設け、中空軸１は回動可能なるもこの
シール機構４にてカバー３内を上室と下室に仕切り、カ
バー３の上下両室の導通を遮断し、これによりカバー３
内特にカバー上室内と下室内の差圧の影響を受けないよ
うにする。Further, a seal mechanism 4 is provided in a position above the bearing 6 in the cover 3, and the hollow shaft 1 is rotatable, but the seal mechanism 4 partitions the interior of the cover 3 into an upper chamber and a lower chamber. The electrical connection between the upper and lower chambers of the
Be especially careful not to be affected by the pressure difference between the upper and lower chambers of the cover.
【００１０】従って上述の如く構成したる曝気機におい
て、好気運転をする際、吸気量調整弁９を開いてモータ
を駆動すると中空軸１を介してプロペラ５が回動し、こ
れによりプロペラ先端水域に発生する負圧にて前記弁９
より大気の空気はカバー３内を経てさらに吸気口１Ｈよ
り中空軸１内を経て中空軸下端の散気口より水中へ微細
な気泡となって放出され、汚水の撹拌曝気が行われる。
この時、弁９の開閉度を調整することにより吸気量が調
整される。またカバー３内の圧力Ｐは大気圧か大気圧に
近い圧力を保つ。Therefore, in the aerator constructed as described above, during aerobic operation, when the intake air amount adjusting valve 9 is opened and the motor is driven, the propeller 5 rotates via the hollow shaft 1 and thereby the propeller tip. The negative pressure generated in the water causes the valve 9
More atmospheric air passes through the cover 3, further through the intake port 1H, through the hollow shaft 1, through the air diffuser at the lower end of the hollow shaft as fine bubbles into the water, and aeration and aeration of the dirty water is performed.
At this time, the intake amount is adjusted by adjusting the opening / closing degree of the valve 9. The pressure P in the cover 3 is maintained at atmospheric pressure or a pressure close to atmospheric pressure.
【００１１】嫌気運転を行うには上記吸気量調整弁９を
閉じてモータの駆動にてプロペラ５を回転させると汚水
はこの回転するプロペラにて撹拌されるが、曝気すなわ
ち吸気はされない。しかしこのプロペラの回転にてプロ
ペラ先端水域には負圧は発生し、この負圧はカバー３内
の空気を吸引する。従って嫌気運転時カバー３内の圧力
Ｐは負圧となる。しかしこのカバー３には水中に開口す
る差圧調整孔７が穿設されているので、カバー内に生じ
る負圧にて該孔７より汚水がカバー内に侵入し、これに
よりカバー内圧力Ｐは好気運転時と同様大気圧もしくは
大気圧に近い状態となる。またこの場合、カバー内はシ
ール機構４にてカバー内の上室と軸受６を有する下室と
は圧力的に分離されているので、カバー内に発生する負
圧にてもカバー端より軸受を通過して汚水は侵入するこ
とがない。このため軸受は汚水中の夾雑物が付着し、か
つ閉鎖するのを未然に防止できる。To perform the anaerobic operation, when the intake amount adjusting valve 9 is closed and the propeller 5 is rotated by driving the motor, the dirty water is agitated by the rotating propeller, but aeration, that is, intake is not performed. However, due to the rotation of the propeller, a negative pressure is generated in the water area at the tip of the propeller, and this negative pressure sucks the air in the cover 3. Therefore, the pressure P in the cover 3 during anaerobic operation becomes a negative pressure. However, since the cover 3 is provided with the differential pressure adjusting hole 7 that opens into the water, the negative pressure generated in the cover causes the dirty water to enter the cover through the hole 7, whereby the pressure P in the cover is reduced. As in aerobic operation, the atmospheric pressure or a state close to atmospheric pressure is reached. Further, in this case, since the upper chamber in the cover and the lower chamber having the bearing 6 are pressure-separated from each other in the cover by the seal mechanism 4, even if the negative pressure generated in the cover causes the bearing to move from the cover end. No sewage will enter through it. Therefore, the bearing can be prevented from adhering and closing the contaminants in the dirty water.
【００１２】[0012]
【発明の効果】本発明によるときは、嫌気運転時におい
てもカバー内は差圧調整孔より汚水の侵入し、軸受内を
汚水が通過しないため軸受内に夾雑物が侵入して詰まり
が生じないので、嫌気運転を円滑に行える利点を有す
る。According to the present invention, even during anaerobic operation, dirty water enters the inside of the cover through the differential pressure adjusting hole and does not pass through the inside of the bearing, so that contaminants do not enter the bearing and clogging does not occur. Therefore, there is an advantage that anaerobic driving can be performed smoothly.
【図１】本発明曝気機の断面図である。FIG. 1 is a sectional view of an aerator of the present invention.
１ 中空軸 １Ｈ 吸気孔 ２ モータ ３ カバー ４ シール機構 ５ プロペラ ６ 軸受 ７ 差圧調整孔 ９ 吸気量調整弁 1 Hollow shaft 1H Intake hole 2 Motor 3 Cover 4 Sealing mechanism 5 Propeller 6 Bearing 7 Differential pressure adjusting hole 9 Intake amount adjusting valve
Claims (1)
を接続し、このプロペラを回転させてプロペラ先端水域
に発生する負圧を利用して中空軸に穿設した吸気孔より
空気を吹き込む曝気機に於て、前記中空軸を覆い、かつ
下端が水面下にあるようにしてカバーを設けるとともに
このカバーには、水面上方位置に吸気量制御弁を、水中
部に差圧調整用孔を夫々設け、さらにこのカバーに中空
軸支持用の軸受より上方位置にシール機構を設けたこと
を特徴とする吸気量調整機構付曝気機。Claim: What is claimed is: 1. A suction shaft formed in a hollow shaft by connecting a motor to a hollow shaft provided with a propeller at a lower end, and rotating the propeller to utilize a negative pressure generated in a water area at the tip of the propeller. In an aerator in which air is blown through a hole, a cover is provided so as to cover the hollow shaft and the lower end is below the water surface. An aerator with an intake air amount adjusting mechanism, characterized in that each pressure adjusting hole is provided, and further, a sealing mechanism is provided on the cover above the bearing for supporting the hollow shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19257991A JP3096493B2 (en) | 1991-07-05 | 1991-07-05 | Aeration machine with intake volume adjustment mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19257991A JP3096493B2 (en) | 1991-07-05 | 1991-07-05 | Aeration machine with intake volume adjustment mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH057890A true JPH057890A (en) | 1993-01-19 |
| JP3096493B2 JP3096493B2 (en) | 2000-10-10 |
Family
ID=16293633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19257991A Expired - Fee Related JP3096493B2 (en) | 1991-07-05 | 1991-07-05 | Aeration machine with intake volume adjustment mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3096493B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10120111A1 (en) * | 2001-04-25 | 2002-11-07 | Fachhochschule Oldenburg Ostfr | Delivery of oxygen into the depths of water, and other liquids, uses a free stream of a gas-rich fluid passed into the lower levels |
| WO2006102802A1 (en) * | 2005-03-30 | 2006-10-05 | Shulin Sun | An actived dissolved oxygen aerator |
| JP2007229692A (en) * | 2006-03-03 | 2007-09-13 | Towa Koso Kk | Waste water treatment tank and wet coating booth |
| CN102417233A (en) * | 2011-09-29 | 2012-04-18 | 太原卫安环保科技有限公司 | Hydrodynamic cavitation oxygenation aerator |
-
1991
- 1991-07-05 JP JP19257991A patent/JP3096493B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10120111A1 (en) * | 2001-04-25 | 2002-11-07 | Fachhochschule Oldenburg Ostfr | Delivery of oxygen into the depths of water, and other liquids, uses a free stream of a gas-rich fluid passed into the lower levels |
| WO2006102802A1 (en) * | 2005-03-30 | 2006-10-05 | Shulin Sun | An actived dissolved oxygen aerator |
| JP2007229692A (en) * | 2006-03-03 | 2007-09-13 | Towa Koso Kk | Waste water treatment tank and wet coating booth |
| CN102417233A (en) * | 2011-09-29 | 2012-04-18 | 太原卫安环保科技有限公司 | Hydrodynamic cavitation oxygenation aerator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3096493B2 (en) | 2000-10-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |