JPH08296582A - Submerged pump - Google Patents
Submerged pumpInfo
- Publication number
- JPH08296582A JPH08296582A JP12588695A JP12588695A JPH08296582A JP H08296582 A JPH08296582 A JP H08296582A JP 12588695 A JP12588695 A JP 12588695A JP 12588695 A JP12588695 A JP 12588695A JP H08296582 A JPH08296582 A JP H08296582A
- Authority
- JP
- Japan
- Prior art keywords
- pump
- suction port
- annular
- suction
- water level
- 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
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【発明の技術分野】本発明は、超低水位での排水を確実
に行わせると共に通常水位での排水をも有効に行わせる
水中ポンプに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a submersible pump that reliably discharges water at an extremely low water level and also effectively discharges water at a normal water level.
【０００２】[0002]
【従来技術とその問題点】一般に水中ポンプは、その据
付床面から排水可能な最低水位というものが、ストレー
ナスタンドの高さ等により制約せられ、低水位での完全
な排水ができず、数cmの残水を生じるというのが実情で
あった。[Prior art and its problems] Generally, the minimum water level that can be drained from the floor of the installed submersible pump is restricted by the height of the strainer stand, etc., and complete drainage at a low water level is not possible. The reality was that it produced a cm of residual water.
【０００３】その対策として吸込口の開口位置を極力低
くし、低水位排水を行わせるようにしたものも存在する
が、この構造では低水位排水専用となり、通常水位での
排水能力は著しく低下するという欠点がある。As a countermeasure against this, there is also a structure in which the opening position of the suction port is made as low as possible to perform low-level drainage. However, this structure is exclusively for low-level drainage, and the drainage capacity at normal level drops significantly. There is a drawback that.
【０００４】[0004]
【発明の目的】本発明の目的は、上述のような従来の欠
点を払拭して、残水を生じることなく超低水位での排水
が完全に行われ、しかも通常水位での排水効率にも何ら
支障を生じることなく有効に機能する水中ポンプを提供
することにある。SUMMARY OF THE INVENTION The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, to completely drain water at an ultra-low water level without producing residual water, and to improve the drainage efficiency at a normal water level. It is to provide a submersible pump that functions effectively without causing any trouble.
【０００５】[0005]
【発明の構成】本発明水中ポンプにおいては、中央にポ
ンプ吸込口を有するサクションカバーの下底面およびイ
ンペラを収容するポンプケーシングの外周面からそれぞ
れ若干の間隔を保有して環状ストレーナを嵌装させ、該
ストレーナの下底面を構成する底板の中央部に前記ポン
プ吸込口と対向する底部吸水孔を穿設すると共にその下
方に浅い通水路を保有させ且つストレーナの周壁に多数
の側部吸水孔を配設し、前記ポンプ吸込口を包囲してサ
クションカバーの下面より導下された環状ベローズの下
縁部を前記底部吸込孔の穿設部よりも外方において底板
上へ内屈状に圧接させて逆流防止構造の環状吸込口を構
成した。In the submersible pump of the present invention, an annular strainer is fitted with a slight distance from the lower bottom surface of the suction cover having a pump suction port at the center and the outer peripheral surface of the pump casing accommodating the impeller. A bottom water absorption hole facing the pump suction port is formed in the center of the bottom plate constituting the lower bottom surface of the strainer, and a shallow water passage is provided below the bottom water absorption hole, and a large number of side water absorption holes are arranged on the peripheral wall of the strainer. The lower edge of the annular bellows that surrounds the pump suction port and is guided down from the lower surface of the suction cover, and presses the bottom edge of the annular bellows inwardly on the bottom plate outside the hole of the bottom suction hole. An annular suction port with a backflow prevention structure was constructed.
【０００６】[0006]
【実施例】以下実施例の図面により説明をする。Embodiments will be described below with reference to the drawings of the embodiments.
【０００７】１はモータケーシング、２はモータケーシ
ング１内に形成されるモータ室、３は例えばアルミダイ
キャスト等で作られたオイルケーシングであって、その
下壁中央部にはポンプ軸４の貫通孔５が穿設されてお
り、周壁上縁部をモータケーシング１の下面に結合させ
ることにより内部にオイル室６が形成される。７はオイ
ルケーシング３の下壁周辺部に係止するよう合成ゴムま
たはそれと均等の材質で作られたポンプケーシング、８
は後記上壁構成部材９の外周縁を支承するようポンプケ
ーシング７の周壁内周面上縁に繞設された支持座、１０
は前記貫通孔５の周辺部裏面に凸設された環状縁であっ
て、その外周面は後記上壁構成部材９の内周面に対向す
る。該上壁構成部材９は合成ゴムまたはそれと均等の材
質で作られ、その内周面は波形の凹凸面に形成されて前
記環状縁１０の外周面との圧合を容易ならしめ、外周縁
は前記支持座８に係止してオイルケーシング３の下壁裏
面に添設される。前記ポンプケーシング７の周壁には上
面開口径が下面開口径よりも大径のコーン状竪孔１１‥
‥１１が配設せられ、該コーン状竪孔１１‥‥１１と対
向するテーパー状柱体１２‥‥１２を前記オイルケーシ
ング３の下壁周辺部に配設し、該テーパー状柱体１２‥
‥１２には後記サクションカバー１３の周辺部に配設さ
れた透孔１４‥‥１４と同心状に対向するネジ孔１５‥
‥１５を下端面から穿設する。上記サクションカバー１
３はポンプケーシング７の下壁構成部材でもあり、中央
にポンプ吸込口１６を有し周辺部には前記テーパー状柱
体１２‥‥１２の下端部と嵌合する透孔１４‥‥１４が
配設され、その上面周辺部を前記ポンプケーシング７の
周壁下縁に定着させることにより渦流室１７が形成せら
れ、その内部にはポンプ軸４の下端に嵌着されたインペ
ラ１８が収容される。１９は周壁要所に多数の側部吸水
孔２０‥‥２０を配設した環状ストレーナ、２１は環状
ストレーナ１９下底面を構成する底板であり、その中央
部には前記ポンプ吸込口１６と対向する底部吸水孔２２
‥‥２２が配設され、周辺部にはサクションカバー１３
の下面周辺部への当接座となる上向段部２３‥‥２３
と、接地座となる下向段部２４‥‥２４とが要所に配設
されて中央部下面に浅い通水路Ｓを保有させ、且つ上向
段部２３‥‥２３にはテーパー状柱体１２‥‥１２のネ
ジ孔１５‥‥１５と同心状に対向するボルト挿通孔２５
‥‥２５が穿設されている。２６は前記ポンプ吸込口１
６を包囲してサクションカバー１３の下面より導下され
た環状のベローズであり、その下縁部は若干小径に狭窄
されるがその内径は、前記底部吸込孔２２‥‥２２の開
口位置よりも外方において底板２１上へ対向するよう設
定されている。Reference numeral 1 is a motor casing, 2 is a motor chamber formed in the motor casing 1, 3 is an oil casing made of, for example, aluminum die casting, and a pump shaft 4 penetrates through a central portion of a lower wall thereof. A hole 5 is formed, and an oil chamber 6 is formed inside by connecting the upper edge of the peripheral wall to the lower surface of the motor casing 1. 7 is a pump casing made of synthetic rubber or a material equivalent to it so as to be locked around the lower wall of the oil casing 3, 8
Is a support seat provided on the upper edge of the inner peripheral surface of the peripheral wall of the pump casing 7 so as to support the outer peripheral edge of the upper wall component 9.
Is an annular edge projectingly provided on the rear surface of the peripheral portion of the through hole 5, the outer peripheral surface of which faces the inner peripheral surface of the upper wall constituent member 9 described later. The upper wall constituting member 9 is made of synthetic rubber or a material equivalent thereto, and the inner peripheral surface thereof is formed into a corrugated uneven surface to facilitate the pressure fitting with the outer peripheral surface of the annular edge 10, and the outer peripheral edge is It is attached to the support seat 8 and is attached to the back surface of the lower wall of the oil casing 3. The peripheral wall of the pump casing 7 has a cone-shaped vertical hole 11 having an upper surface opening diameter larger than a lower surface opening diameter.
11 are provided, and the tapered columnar bodies 12 ... 12 facing the cone-shaped vertical holes 11 ... 11 are disposed around the lower wall of the oil casing 3, and the tapered columnar bodies 12.
12 are screw holes 15 concentrically opposed to through holes 14 provided in the peripheral portion of a suction cover 13 described later.
15 is drilled from the lower end surface. Above suction cover 1
Reference numeral 3 is also a lower wall constituent member of the pump casing 7, and has a pump suction port 16 at the center and through holes 14 ... 14 which are fitted to the lower ends of the tapered columnar bodies 12 ... The swirl chamber 17 is formed by fixing the peripheral portion of the upper surface to the lower edge of the peripheral wall of the pump casing 7, and the impeller 18 fitted to the lower end of the pump shaft 4 is housed in the swirl chamber 17. Reference numeral 19 denotes an annular strainer in which a large number of side water absorption holes 20 ... 20 are arranged in the peripheral wall, and 21 denotes a bottom plate which constitutes the lower bottom surface of the annular strainer 19, and the central portion thereof faces the pump suction port 16. Bottom water absorption hole 22
22 is provided, and the suction cover 13 is provided on the periphery.
Upward step portion 23 ...
, And downward step portions 24, ... 24 serving as grounding seats are arranged at important points so that a shallow water passage S is held on the lower surface of the central portion, and the upward step portions 23. 12 ... 12 screw holes 15 ... bolt insertion holes 25 concentrically opposed to 15
........................ 25 is drilled. 26 is the pump suction port 1
6 is an annular bellows which surrounds 6 and is guided down from the lower surface of the suction cover 13. The lower edge of the bellows is narrowed to a slightly smaller diameter, but its inner diameter is smaller than the opening position of the bottom suction holes 22 ... It is set to face the bottom plate 21 outward.
【０００８】上述の構成において、各コーン状竪孔１１
‥‥１１内にテーパー状柱体１２‥‥１２を嵌合させ、
サクションカバー１３の周辺部に配設されている透孔１
４‥‥１４をテーパー状柱体１２‥‥１２の下端部へ嵌
合させ、上向段部２３‥‥２３に配設されたボルト挿通
孔２５‥‥２５をネジ孔１５‥‥１５と合致させ、各ボ
ルト挿通孔２５‥‥２５より締付ボルト２７‥‥２７を
挿通してそれぞれネジ孔１５‥‥１５に螺着する。この
ようにして締付ボルト２７‥‥２７を螺着することによ
り、サクションカバー１３および環状ストレーナ１９と
共にポンプケーシング７をオイルケーシング３へ結合さ
せることができ、サクションカバー１３の下底面および
ポンプケーシング７の周壁外周面からそれぞれ若干の間
隔を保有して環状ストレーナ１９が嵌装せられる。そし
てサクションカバー１３の下面より導下された環状ベー
ローズ２６の下縁部が底部吸込孔２２‥‥２２の穿設部
よりも外方における底板２１上へ内屈状に圧接して該圧
接部に逆流防止構造の環状吸込口２８が構成せられるこ
とになり、環状ストレーナ１９の側部吸水孔２０‥‥２
０から環状吸込口２８を経てポンプ吸込口１６へ至る第
１の流通経路と、底板２１下面の浅い通水路Ｓから底部
吸水孔２２‥‥２２を通ってポンプ吸込口１６に至る第
２の流通経路が形成される。In the above structure, each cone-shaped vertical hole 11
Fit the tapered columnar body 12 ... into the inside of 11
Through-hole 1 provided around the suction cover 13
14 is fitted to the lower end portion of the tapered columnar body 12 ... 12, and the bolt insertion holes 25 ... 25 arranged in the upward step portions 23 ... 23 are aligned with the screw holes 15 ... 15. Then, the tightening bolts 27 ... 27 are inserted from the respective bolt insertion holes 25 ... 25 and screwed into the screw holes 15. By screwing the tightening bolts 27 ... 27 in this way, the pump casing 7 can be coupled to the oil casing 3 together with the suction cover 13 and the annular strainer 19, and the lower bottom surface of the suction cover 13 and the pump casing 7 can be connected. The annular strainers 19 are fitted to the outer peripheral surface of the peripheral wall at a slight distance from each other. The lower edge of the annular bellows 26 guided from the lower surface of the suction cover 13 is inwardly pressure-contacted to the bottom plate 21 outside the hole of the bottom suction holes 22 ... Since the annular suction port 28 having the backflow prevention structure is configured, the side water absorption holes 20 ... 2 of the annular strainer 19 are formed.
0 to the pump suction port 16 via the annular suction port 28 and the second flow path from the shallow water passage S on the bottom surface of the bottom plate 21 to the pump suction port 16 through the bottom water suction holes 22 ... A path is formed.
【０００９】[0009]
【作用】水中ポンプの停止時には、環状ベローズ２６の
下縁部がその弾力により底板２１上に圧接して、逆流防
止構造の環状吸込口２８は閉塞状態に保たれている。し
かし所定の上昇水位で水中ポンプを起動させると、イン
ペラ１８の下部に負圧が発生して環状ベローズ２６の下
縁部は底板２１上から浮き上がり、環状吸込口２８を開
口させて通水状態となるので、環状ストレーナ１９の側
部吸水孔２０‥‥２０より吸い込まれた水は環状吸込口
２８を通過しポンプ吸込口１６より渦流室１７内を経て
ポンプ吐出口２９から排水される。そして排水の進行に
より水位が次第に低下して側部吸水孔２０‥‥２０が水
面上へ露出する低水位ｌ1まで達すると、環状ベローズ
２６の下縁部が底板２１上に押し付けられて環状吸込口
２８を閉塞するので、側部吸水孔２０‥‥２０からポン
プ吸込口１６へ至る第１の流通経路は遮断され、底板２
１下面の通水路Ｓから底部吸水孔２２‥‥２２を通って
吸い込まれた水がポンプ吸込口１６より渦流室１７内を
経てポンプ吐出口２９から排出されるのであるが、この
間環状ベローズ２６による逆流防止機能が働いているた
め、側部吸水孔２０‥‥２０が水面上に露出していても
低水位での排水は、上記底部吸水孔２２‥‥２２からポ
ンプ吸込口１６へ至る第２の流通路により支障なく、渇
水状態となる超低水位ｌ2まで行われるのである。When the submersible pump is stopped, the lower edge of the annular bellows 26 is pressed against the bottom plate 21 by its elasticity, and the annular suction port 28 of the backflow prevention structure is kept closed. However, when the submersible pump is started at a predetermined rising water level, a negative pressure is generated in the lower part of the impeller 18, the lower edge of the annular bellows 26 floats above the bottom plate 21, and the annular suction port 28 is opened to allow water to flow. Therefore, the water sucked from the side water absorption holes 20 ... 20 of the annular strainer 19 passes through the annular suction port 28 and is discharged from the pump suction port 16 through the swirl chamber 17 and the pump discharge port 29. When the water level gradually decreases due to the progress of the drainage and reaches the low water level l 1 where the side water absorption holes 20 ... 20 are exposed above the water surface, the lower edge of the annular bellows 26 is pressed against the bottom plate 21 and the annular suction is performed. Since the port 28 is closed, the first flow path from the side water absorption holes 20 ... 20 to the pump suction port 16 is blocked, and the bottom plate 2
1. The water sucked from the water passage S on the lower surface 1 through the bottom water suction holes 22 ... 22 is discharged from the pump suction port 16 through the swirl chamber 17 and the pump discharge port 29. Since the backflow prevention function is working, even if the side water absorption holes 20 ... 20 are exposed above the water surface, the drainage at a low water level is the second water from the bottom water absorption holes 22 ... 22 to the pump suction port 16. With the flow passage of No. 2, there is no hindrance, and it is performed up to the ultra-low water level l 2 in which a drought condition occurs.
【００１０】[0010]
【発明の効果】本発明水中ポンプによれば、通常水位か
ら超低水位までの排水が有効・確実に行われるという利
点がある。しかも本発明の実施に当たっては、既成の水
中ポンプを利用してサクションカバーの下面に環状ベロ
ーズを付設し且つ環状ストレーナの底板中央に底部吸込
孔を付加するという僅かな改造により行い得るので、産
業上の利用価値は多大である。According to the submersible pump of the present invention, there is an advantage that the drainage from the normal water level to the ultra-low water level is effectively and surely performed. Moreover, in carrying out the present invention, it is possible to carry out a slight modification by using an existing submersible pump to attach an annular bellows to the lower surface of the suction cover and to add a bottom suction hole to the center of the bottom plate of the annular strainer. The utility value of is enormous.
【図１】本発明水中ポンプの要部縦断側面図である。FIG. 1 is a vertical sectional side view of a main part of a submersible pump of the present invention.
【図２】本発明水中ポンプにおけるオイルケーシングの
縦断側面図である。FIG. 2 is a vertical sectional side view of an oil casing in the submersible pump of the present invention.
【図３】本発明水中ポンプにおけるポンプケーシング上
壁構成部材の縦断側面図である。FIG. 3 is a vertical sectional side view of a pump casing upper wall constituent member in the submersible pump of the present invention.
【図４】本発明水中ポンプにおけるポンプケーシング周
壁の縦断側面図である。FIG. 4 is a vertical sectional side view of a peripheral wall of a pump casing in the submersible pump of the present invention.
【図５】本発明水中ポンプにおけるサクションカバーお
よび環状ベローズの縦断側面図である。FIG. 5 is a vertical sectional side view of a suction cover and an annular bellows in the submersible pump of the present invention.
【図６】本発明水中ポンプにおける環状ストレーナの縦
断側面図である。FIG. 6 is a vertical sectional side view of an annular strainer in the submersible pump of the present invention.
７ ポンプケーシング １３ サクションカバー １６ ポンプ吸込口 １８ インペラ １９ 環状ストレーナ ２０ 側部吸水孔 ２１ 底板 ２２ 底部吸水孔 ２６ 環状ベローズ ２８ 環状吸込口 Ｓ 浅い通水路 7 Pump casing 13 Suction cover 16 Pump suction port 18 Impeller 19 Annular strainer 20 Side water absorption hole 21 Bottom plate 22 Bottom water absorption hole 26 Annular bellows 28 Annular suction port S Shallow water passage
Claims (1)
バーの下底面およびインペラを収容するポンプケーシン
グの外周面からそれぞれ若干の間隔を保有して環状スト
レーナを嵌装させ、該ストレーナの下底面を構成する底
板の中央部に前記ポンプ吸込口と対向する底部吸水孔を
穿設すると共にその下方に浅い通水路を保有させ且つス
トレーナの周壁に多数の側部吸水孔を配設し、前記ポン
プ吸込口を包囲してサクションカバーの下面より導下さ
れた環状ベローズの下縁部を前記底部吸込孔の穿設部よ
りも外方において底板上へ内屈状に圧接させて逆流防止
構造の環状吸込口を構成したことを特徴とする水中ポン
プ。1. An annular strainer is fitted at a slight distance from the lower bottom surface of a suction cover having a pump suction port at the center and the outer peripheral surface of a pump casing accommodating an impeller, to form the lower bottom surface of the strainer. A bottom water absorption hole facing the pump suction port is formed in the center of the bottom plate, a shallow water passage is provided below the bottom water absorption hole, and a large number of side water absorption holes are provided on the peripheral wall of the strainer. The annular suction port of the backflow prevention structure is formed by pressing the lower edge of the annular bellows that surrounds the lower part of the suction cover and is guided inwardly on the bottom plate outside the hole of the bottom suction hole. A submersible pump characterized by being configured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12588695A JP3589741B2 (en) | 1995-04-25 | 1995-04-25 | underwater pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12588695A JP3589741B2 (en) | 1995-04-25 | 1995-04-25 | underwater pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08296582A true JPH08296582A (en) | 1996-11-12 |
| JP3589741B2 JP3589741B2 (en) | 2004-11-17 |
Family
ID=14921363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12588695A Expired - Lifetime JP3589741B2 (en) | 1995-04-25 | 1995-04-25 | underwater pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3589741B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001173593A (en) * | 1999-12-22 | 2001-06-26 | Tsurumi Mfg Co Ltd | Shaft seal unit for electromotive pump |
| JP2001173592A (en) * | 1999-12-22 | 2001-06-26 | Tsurumi Mfg Co Ltd | Electromotive pump |
| JP2002021768A (en) * | 2000-07-04 | 2002-01-23 | Tsurumi Mfg Co Ltd | Suction cover in submergible pump and fixing structure for strainer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100852539B1 (en) * | 2007-08-29 | 2008-08-14 | 대우조선해양 주식회사 | Lng supply assistance device with means for preventing backward flow |
-
1995
- 1995-04-25 JP JP12588695A patent/JP3589741B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001173593A (en) * | 1999-12-22 | 2001-06-26 | Tsurumi Mfg Co Ltd | Shaft seal unit for electromotive pump |
| JP2001173592A (en) * | 1999-12-22 | 2001-06-26 | Tsurumi Mfg Co Ltd | Electromotive pump |
| JP2002021768A (en) * | 2000-07-04 | 2002-01-23 | Tsurumi Mfg Co Ltd | Suction cover in submergible pump and fixing structure for strainer |
| JP4518636B2 (en) * | 2000-07-04 | 2010-08-04 | 株式会社鶴見製作所 | Suction cover and strainer fixing structure in submersible pumps |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3589741B2 (en) | 2004-11-17 |
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