JP2569630Y2 - Centrifugal pump - Google Patents

Centrifugal pump

Info

Publication number
JP2569630Y2
JP2569630Y2 JP1997003020U JP302097U JP2569630Y2 JP 2569630 Y2 JP2569630 Y2 JP 2569630Y2 JP 1997003020 U JP1997003020 U JP 1997003020U JP 302097 U JP302097 U JP 302097U JP 2569630 Y2 JP2569630 Y2 JP 2569630Y2
Authority
JP
Japan
Prior art keywords
suction cover
pump
centrifugal pump
pump casing
recessed
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.)
Expired - Fee Related
Application number
JP1997003020U
Other languages
Japanese (ja)
Other versions
JPH09435U (en
Inventor
静夫 田中
泰人 窪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsurumi Manufacturing Co Ltd
Original Assignee
Tsurumi Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tsurumi Manufacturing Co Ltd filed Critical Tsurumi Manufacturing Co Ltd
Priority to JP1997003020U priority Critical patent/JP2569630Y2/en
Publication of JPH09435U publication Critical patent/JPH09435U/en
Application granted granted Critical
Publication of JP2569630Y2 publication Critical patent/JP2569630Y2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

【考案の詳細な説明】 【0001】 【産業上の利用分野】本考案は、渦巻ポンプに関するも
のである。 【0002】 【従来の技術】渦巻ポンプを汚水中で使用した場合、吸
水中に混在する夾雑物によって渦流室内に閉塞を生じる
ことが多く、特に繊維状の長物が、水切り部に引掛かり
易いのである。水切り部の突出を短くしてその先端に丸
味を持たせた形状とすれば、夾雑物は通過し易くなる
が、これは反面ポンプ性能を犠牲にすることにもなるの
で、清水中で使用するポンプには不適当である。 【0003】従来の渦巻ポンプは、汚水中で使用される
ものは当初から汚水用として設計されており、清水中で
使用されるものは当初から清水用として設計されてい
る。 【0004】 【考案が解決しようとする課題】汚水用に設計されたも
のを清水用に適したように変更したり、清水用に設計さ
れたものを汚水用に適したように改造することも、従来
のケーシング構造では困難である。 【0005】本考案の目的は、渦流室内部が清水用に適
した状態と、汚水用に適した状態とに変更し得られる渦
巻ポンプを提供することにある。 【0006】 【問題を解決するための手段】本考案に係る渦巻ポンプ
においては、吸込カバーの外縁部分を上下に凸出させて
ポンプケーシング周壁に形成し、一方の周壁をポンプケ
ーシング上壁の周辺部へ接続させることにより吸込カバ
ーの一面上に渦流室を凹設させ、また、他方の周壁をポ
ンプケーシング上壁の周辺部へ接続させることにより吸
込カバーの他面上に渦流室を凹設させ、かつ、吸込カバ
ーの一面上に凹設される渦流室における水切り部の突出
長さを、吸込カバーの他面上に凹設される渦流室におけ
る水切り部の突出長さよりも短く形成して、その先端に
丸みを持たせている。 【0007】 【実施例】以下実施例の図面により説明をする。 【0008】1はポンプケーシング上壁、2はポンプケ
ーシング上壁1の下方においてモーター軸3に嵌着され
た羽根車、4は羽根車2の羽根板下縁2eと裏返し自在
に対向する吸込カバーであって、中央部に吸込孔5を穿
設し、外縁部分を上下に凸出させてポンプケーシング周
壁6a,6bに形成し、各周壁6a,6bの端縁部をポ
ンプケーシング上壁1の周辺部下縁への取付部に形成す
る。そして図1のように吸込カバー4の一面4aを羽根
車2の羽根板下縁2eに対向させ、一方の周壁6aをポ
ンプケーシング上壁1の周辺部下縁へ接続させることに
より吸込カバー4の一面4a上に渦流室7aが凹設され
る。また、図2のように吸込カバー4の他面4bを羽根
車2の羽根板下縁2eに対向させ、他方の周壁6bをポ
ンプケーシング上壁1の周辺部下縁へ接続させることに
より吸込カバー4の他面4b上に渦流室7bが凹設され
る。ただし、吸込カバー4の一面4a上に凹設される渦
流室7aにおける水切り部13aの突出長さを、吸込カ
バー4の他面4b上に凹設される渦流室7bにおける水
切り部13bの突出長さよりも短く形成して、その先端
に丸みを持たせておくのである。更に要すれば、渦流室
7aにおける減速のための円周部分12aを渦流室7b
におけるそれよりも若干外側へ拡げた態様に形成する。
従って図1の場合には、ポンプ性能は若干低下するが夾
雑物は通過し易く、繊維状の長物などが水切り部13a
に引掛かることを防止し得られるので、汚水用として好
適な渦巻ポンプが構成されたことになる。他方、図2の
場合には、夾雑物の通過性は良好と言えず、繊維状の長
物などが水切り部13bに引掛かるおそれもあるので汚
水用には不向きであるが、清水用としては図1の場合よ
りもポンプ性能に優るものである。 【0009】8‥‥8は取付ボルト、9‥‥9はポンプ
ケーシング周壁6aおよび6bの取付部に配設されたボ
ルト挿通孔、10‥‥10はポンプケーシング上壁1の
周辺部にその下縁から穿設されたネジ孔である。 【0010】前述のようにして一方の周壁6aをポンプ
ケーシング上壁1の周辺部下縁へ対向させた場合には、
吸込カバー4の一面4a上において水切り部13aが短
く先端に丸味を持った態様となっている渦流室7aが形
成せられ、また、他方の周壁6bをポンプケーシング上
壁1の周辺部下縁へ対向させた場合には、吸込カバー4
の他面4b上において水切り部13bが普通の態様とな
っている渦流室7bが形成せられる。これらいずれかの
状態により、取付ボルト8‥‥8をボルト挿通孔9‥‥
9からネジ孔10‥‥10へ螺着して、吸込カバー4と
一体のポンプケーシング周壁6a,6bをポンプケーシ
ング上壁1の周辺部下縁へ着脱自在に定着させるのであ
る。 【0011】そして図1の使用例においては汚水用とし
て好適な渦巻ポンプが構成せられるが、この使用例にお
ける吸込カバー4を取り外してこれを裏返し、他面4b
を羽根板下縁2eに対向させた図2の状態により再び吸
込カバー4を定着させると、清水用として好適な渦巻ポ
ンプが構成されるのである。 【0012】図8および図9に例示されたストレーナー
14は、本考案渦巻ポンプに附設して好適なものであ
り、多数の通水用細孔15‥‥15を穿設した固形物流
入阻止板16を環状板17の一方の端縁寄りに横設し、
固形物流入阻止板16の通水用細孔15‥‥15よりも
粗目の通水口18を環状板17の周側部に開設してな
り、固形物流入阻止板16の一面16aを吸込カバー4
の下面へ対向させて定着することにより通水口18から
通水用細孔15‥‥15を経てポンプ吸込口5に至る通
水路が構成せられ、また、固形物流入阻止板16の他面
16bを吸込カバー4の下面へ対向させて定着すること
により通水口18から吸込カバー4の下面を経てポンプ
吸込口5に至る通水路が構成される。 【0013】上記ストレーナー14を本考案渦巻ポンプ
に附設するについて、固形物流入阻止板16の一面16
aを吸込カバー4の下面へ対向させて定着した場合に
は、渦巻ポンプの駆動時において、汚水中に混在してい
る大きな固形物は固形物流入阻止板16により遮断さ
れ、通水用細孔15‥‥15により濾された水および微
小な固形物のみがポンプ吸込口5から吸い込まれるの
で、清水用として図2のように構成された渦巻ポンプへ
の附設態様として好適である。また、固形物流入阻止板
16の他面を吸込カバー4の下面へ対向させて定着した
場合には、渦巻ポンプの駆動時において、ポンプ吸込口
5を通過し得ないような極く大形の固形物のみが環状板
17により阻止せられ、その余りの固形物は水と共に粗
目の通水口18を通ってポンプ吸込口5から吸い込まれ
るので、汚水用として図1のように構成された渦巻ポン
プへの附設態様として好適である。 【0014】 【考案の効果】本考案によれば、吸込カバーの取付面を
変更するだけの簡単な作業により、渦巻ポンプの用途に
従い、渦流室の内部を清水用に適した状態と、汚水用に
適した状態とに変更し得るので、極めて便利である。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal pump. 2. Description of the Related Art When a centrifugal pump is used in sewage, clogging often occurs in a vortex chamber due to impurities mixed in with water absorption, and particularly, a long fibrous material tends to catch on a drain section. is there. If the projecting part of the drainer is made shorter and its tip has a rounded shape, impurities can easily pass through, but this will also sacrifice pump performance, so use it in fresh water. Not suitable for pumps. A conventional centrifugal pump used in sewage is designed for sewage from the beginning, and a pump used in fresh water is designed for sewage from the beginning. [0004] It is also possible to change a material designed for sewage to be suitable for fresh water, or to modify a material designed for sewage to be suitable for sewage. However, it is difficult with the conventional casing structure. [0005] An object of the present invention is to provide a centrifugal pump in which the inside of a vortex chamber can be changed between a state suitable for fresh water and a state suitable for sewage. In the centrifugal pump according to the present invention, the outer peripheral portion of the suction cover is formed so as to protrude up and down on the peripheral wall of the pump casing, and one peripheral wall is formed around the upper wall of the pump casing. To form a swirl chamber on one surface of the suction cover, and connect the other peripheral wall to the periphery of the upper wall of the pump casing to form a swirl chamber on the other surface of the suction cover. And, the projecting length of the drain portion in the vortex chamber recessed on one surface of the suction cover is formed shorter than the projecting length of the drain portion in the vortex chamber recessed on the other surface of the suction cover, The tip is rounded. An embodiment will be described below with reference to the drawings. Reference numeral 1 denotes an upper wall of the pump casing, 2 denotes an impeller fitted to the motor shaft 3 below the upper wall 1 of the pump casing, and 4 denotes a suction cover which faces the lower edge 2e of the impeller 2 so as to be able to turn over. In addition, a suction hole 5 is formed in the center, and the outer edge portion is formed so as to protrude up and down on the pump casing peripheral walls 6a and 6b. Formed on the lower edge of the periphery. As shown in FIG. 1, one surface 4a of the suction cover 4 is opposed to the lower edge 2e of the blade plate of the impeller 2, and one peripheral wall 6a is connected to the lower edge of the peripheral portion of the upper wall 1 of the pump casing. A swirl chamber 7a is recessed on 4a. 2, the other surface 4b of the suction cover 4 faces the lower edge 2e of the blade plate of the impeller 2, and the other peripheral wall 6b is connected to the lower edge of the peripheral portion of the upper wall 1 of the pump casing. The swirl chamber 7b is recessed on the other surface 4b. However, the projecting length of the water drain portion 13a in the swirl chamber 7a recessed on one surface 4a of the suction cover 4 is set to the projecting length of the water drain portion 13b in the swirl chamber 7b recessed on the other surface 4b of the suction cover 4. It is made shorter than that, and its tip is rounded. If necessary, the circumferential portion 12a for deceleration in the vortex chamber 7a is replaced with the vortex chamber 7b.
Is formed in a mode that is slightly outwardly expanded from that in.
Therefore, in the case of FIG. 1, although the pump performance is slightly lowered, impurities are easily passed through, and the fibrous long material and the like appear in the draining portion 13a.
Therefore, a centrifugal pump suitable for sewage is configured. On the other hand, in the case of FIG. 2, the permeability of the contaminants is not good, and there is a possibility that the fibrous long material may be caught on the draining portion 13b. The pump performance is better than the case of 1. 8 ‥‥ 8 is a mounting bolt, 9 ‥‥ 9 is a bolt insertion hole provided in the mounting portion of the pump casing peripheral walls 6a and 6b, and 10 ‥‥ 10 is a peripheral part of the upper wall 1 of the pump casing. It is a screw hole drilled from the edge. As described above, when one of the peripheral walls 6a is opposed to the lower edge of the peripheral portion of the upper wall 1 of the pump casing,
On one surface 4a of the suction cover 4, a swirl chamber 7a having a short draining portion 13a and a rounded tip is formed, and the other peripheral wall 6b faces the lower edge of the peripheral portion of the upper wall 1 of the pump casing. If you do, the suction cover 4
On the other surface 4b, a vortex chamber 7b in which the draining portion 13b has a normal mode is formed. In any of these states, the mounting bolts 8 # 8 are inserted into the bolt insertion holes 9 #.
The screw 9 is screwed into the screw holes 10 # 10, and the pump casing peripheral walls 6a, 6b integral with the suction cover 4 are detachably fixed to the lower edge of the peripheral portion of the pump casing upper wall 1. In the example of use of FIG. 1, a centrifugal pump suitable for sewage is formed, but the suction cover 4 in this example of use is removed and turned over, and the other surface 4b
When the suction cover 4 is fixed again in the state shown in FIG. 2 where the suction pump faces the lower edge 2e of the blade, a spiral pump suitable for fresh water is formed. The strainer 14 illustrated in FIGS. 8 and 9 is suitable for being attached to the centrifugal pump according to the present invention, and has a solid inflow prevention plate having a large number of water passage holes 15 # 15. 16 is placed laterally near one edge of the annular plate 17,
A water inlet 18 coarser than the water passage holes 15 and 15 of the solid inflow prevention plate 16 is formed on the peripheral side of the annular plate 17, and one surface 16 a of the solid inflow prevention plate 16 is connected to the suction cover 4.
A water passage from the water inlet 18 to the pump suction port 5 through the water passage holes 15 # 15 is formed by being fixed to the lower surface of the solid body. Is fixed to the lower surface of the suction cover 4 so as to face the lower surface of the suction cover 4, thereby forming a water passage from the water inlet 18 to the pump suction port 5 through the lower surface of the suction cover 4. The above-described strainer 14 is attached to the centrifugal pump of the present invention.
a is fixed to the lower surface of the suction cover 4 so as to face the lower surface of the suction cover 4, the large solid matter mixed in the sewage is blocked by the solid matter inflow prevention plate 16 when the centrifugal pump is driven, and Since only water and fine solids filtered through 15/15 are sucked from the pump suction port 5, it is suitable as a mode for attaching to a centrifugal pump configured as shown in FIG. 2 for fresh water. When the other surface of the solid substance inflow prevention plate 16 is fixed to the lower surface of the suction cover 4 so as to be opposed to the lower surface of the suction cover 4, an extremely large size that cannot pass through the pump suction port 5 when the centrifugal pump is driven. Only the solid matter is blocked by the annular plate 17, and the remaining solid matter is sucked from the pump suction port 5 through the coarse water passage 18 together with the water, so that the centrifugal pump configured as shown in FIG. This is suitable as a mode of attachment to the device. According to the present invention, according to the present invention, the inside of the vortex chamber is suitable for fresh water and the state for sewage can be changed according to the use of the vortex pump by a simple operation of changing the mounting surface of the suction cover. This is extremely convenient because it can be changed to a state suitable for

【図面の簡単な説明】 【図1】渦流室の内部が汚水用に適した状態となるよう
組み立てられた本考案渦巻ポンプの要部縦断側面図であ
る。 【図2】渦流室の内部が清水用に適した状態となるよう
組み立てられた本考案渦巻ポンプの要部縦断側面図であ
る。 【図3】本考案渦巻ポンプにおける吸込カバーおよびポ
ンプケーシング周壁部分の一面から見た平面図である。 【図4】図3のA−A線における縦断側面図である。 【図5】本考案渦巻ポンプにおける吸込カバーおよびポ
ンプケーシング周壁部分の他面から見た平面図である。 【図6】図5のB−B線における縦断側面図である。 【図7】本考案渦巻ポンプにおける吸込カバーの一面に
形成された渦巻室の水切り部と、吸込カバーの他面に形
成された渦巻室の水切り部との比較を示した説明図であ
る。 【図8】本考案渦巻ポンプに附設して好適なストレーナ
ーの平面図である。 【図9】図8のC−C線における縦断側面図である。 【符号の説明】 1 ポンプケーシング上壁 4 吸込カバー 4a 吸込カバーの一面 4b 吸込カバーの他面 6a ポンプケーシングの一方の周壁 6b ポンプケーシングの他方の周壁 7a 吸込カバーの一面上に凹設された渦流室 7b 吸込カバーの他面上に凹設された渦流室 11 吐出口 13a 一方の渦流室における水切り部 13b 他方の渦流室における水切り部
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional side view of a main part of a centrifugal pump of the present invention assembled so that the inside of a vortex chamber is suitable for sewage. FIG. 2 is a longitudinal sectional side view of a main part of the centrifugal pump of the present invention assembled so that the inside of the vortex chamber is in a state suitable for fresh water. FIG. 3 is a plan view of the suction cover and the peripheral wall of the pump casing of the centrifugal pump according to the present invention; FIG. 4 is a longitudinal sectional side view taken along line AA of FIG. 3; FIG. 5 is a plan view of the suction cover and the peripheral wall of the pump casing of the centrifugal pump according to the present invention, as viewed from the other surface. FIG. 6 is a longitudinal sectional side view taken along line BB of FIG. 5; FIG. 7 is an explanatory view showing a comparison between a drain portion of a volute chamber formed on one surface of the suction cover and a drain portion of a volute chamber formed on the other surface of the suction cover in the volute pump of the present invention. FIG. 8 is a plan view of a strainer preferably attached to the centrifugal pump according to the present invention. FIG. 9 is a vertical sectional side view taken along line CC of FIG. 8; DESCRIPTION OF SYMBOLS 1 Upper wall of pump casing 4 Suction cover 4a One surface 4b of suction cover The other surface 6a of suction cover One peripheral wall 6b of pump casing The other peripheral wall 7a of pump casing Eddy current recessed on one surface of suction cover Chamber 7b Swirling chamber 11 recessed on the other surface of the suction cover Discharge port 13a Drain section 13b in one swirl chamber Drain section in the other swirl chamber

Claims (1)

(57)【実用新案登録請求の範囲】 吸込カバー(4)の外縁部分を上下に凸出させてポンプ
ケーシング周壁(6a,6b)に形成し、一方の周壁
(6a)をポンプケーシング上壁(1)の周辺部へ接続
させることにより吸込カバー(4)の一面(4a)上に
渦流室(7a)を凹設させ、また、他方の周壁(6b)
をポンプケーシング上壁(1)の周辺部へ接続させるこ
とにより吸込カバー(4)の他面(4b)上に渦流室
(7b)を凹設させ、かつ、吸込カバー(4)の一面
(4a)上に凹設される渦流室(7a)における水切り
部(13a)の突出長さを、吸込カバー(4)の他面
(4b)上に凹設される渦流室(7b)における水切り
部(13b)の突出長さよりも短く形成して、その先端
に丸みを持たせたことを特徴とする渦巻ポンプ。
(57) [Claims for Registering Utility Model] The outer peripheral portion of the suction cover (4) is formed so as to protrude up and down on the peripheral wall of the pump casing (6a, 6b), and one peripheral wall (6a) is formed on the upper wall of the pump casing (6a). The vortex chamber (7a) is recessed on one surface (4a) of the suction cover (4) by being connected to the peripheral portion of 1), and the other peripheral wall (6b) is formed.
Is connected to the peripheral portion of the upper wall (1) of the pump casing, so that the swirl chamber (7b) is recessed on the other surface (4b) of the suction cover (4), and one surface (4a) of the suction cover (4) is formed. The protrusion length of the drain section (13a) in the vortex chamber (7a) recessed above is determined by the drain section (13) in the vortex chamber (7b) recessed on the other surface (4b) of the suction cover (4). A centrifugal pump characterized by being formed shorter than the protruding length of 13b) and having a rounded tip.
JP1997003020U 1997-04-03 1997-04-03 Centrifugal pump Expired - Fee Related JP2569630Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1997003020U JP2569630Y2 (en) 1997-04-03 1997-04-03 Centrifugal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1997003020U JP2569630Y2 (en) 1997-04-03 1997-04-03 Centrifugal pump

Publications (2)

Publication Number Publication Date
JPH09435U JPH09435U (en) 1997-08-15
JP2569630Y2 true JP2569630Y2 (en) 1998-04-28

Family

ID=17904901

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1997003020U Expired - Fee Related JP2569630Y2 (en) 1997-04-03 1997-04-03 Centrifugal pump

Country Status (1)

Country Link
JP (1) JP2569630Y2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005240766A (en) * 2004-02-27 2005-09-08 Shin Meiwa Ind Co Ltd Liquid pump
KR101312498B1 (en) * 2013-02-22 2013-10-01 이정기 Submerged drainage grinder pump, pipe transfer vortex accelerator, and sewage transfer system using the same

Also Published As

Publication number Publication date
JPH09435U (en) 1997-08-15

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