JPH02141695U - - Google Patents

Info

Publication number
JPH02141695U
JPH02141695U JP5022189U JP5022189U JPH02141695U JP H02141695 U JPH02141695 U JP H02141695U JP 5022189 U JP5022189 U JP 5022189U JP 5022189 U JP5022189 U JP 5022189U JP H02141695 U JPH02141695 U JP H02141695U
Authority
JP
Japan
Prior art keywords
hole
full
water level
impeller
vertical shaft
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
Application number
JP5022189U
Other languages
Japanese (ja)
Other versions
JP2524872Y2 (en
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 filed Critical
Priority to JP1989050221U priority Critical patent/JP2524872Y2/en
Publication of JPH02141695U publication Critical patent/JPH02141695U/ja
Application granted granted Critical
Publication of JP2524872Y2 publication Critical patent/JP2524872Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • Control Of Non-Positive-Displacement Pumps (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図及び第２図は本考案の異なつた実施例を
示す立軸ポンプの縦断面図、第３図及び第４図は
水位変化に対する空気吸入量と排水量の変動を示
す線図、第５図は従来例を示す立軸ポンプの縦断
面図である。 １……吸込水槽、２……羽根車、３，１３……
ポンプ、４，１４……吸込管、５……貫通孔、６
……空気管、６ａ……開口。 Figures 1 and 2 are vertical sectional views of vertical shaft pumps showing different embodiments of the present invention, Figures 3 and 4 are diagrams showing changes in air intake and displacement with respect to changes in water level, and Figure 5. 1 is a vertical sectional view of a conventional vertical shaft pump. 1... Suction water tank, 2... Impeller, 3, 13...
Pump, 4, 14...Suction pipe, 5...Through hole, 6
...Air pipe, 6a...opening.

Claims (1)

【実用新案登録請求の範囲】 １ 最低運転水位以下に羽根車を位置させるよう
にした立軸ポンプにおいて、羽根車入口側の吸込
管に貫通孔を設け、該貫通孔に、最高水位の上方
に開口して外気に通じる空気管を取付け、最低運
転水位以下で安定的に空気を流入して排水量を低
下させるようにし、上記貫通孔近くまで水位が低
下したとき羽根車入口に空気溜りが生じ排水を停
止して待機状態とすることにより、外的制御を行
なうことなく全速待機運転を可能にしたことを特
徴とする全速待機運転ポンプ。 ２ 小口径で没水が浅い立軸ポンプでは、羽根車
の入口側に設ける貫通孔を、吸込管の流速が遅く
なる流入口附近に設けたことを特徴とする請求項
１記載の全速待機運転ポンプ。 ３ 大口径で没水が深い立軸ポンプでは、吸込管
の貫通孔部に絞りを設けたことを特徴とする請求
項１記載の全速待機運転ポンプ。[Scope of claim for utility model registration] 1. In a vertical shaft pump in which the impeller is positioned below the minimum operating water level, a through hole is provided in the suction pipe on the impeller inlet side, and an opening is provided in the through hole above the maximum water level. An air pipe leading to the outside air is installed to reduce the amount of drainage by stably inflowing air below the minimum operating water level, and when the water level drops to near the above-mentioned through hole, an air pocket forms at the impeller inlet, preventing drainage. A full-speed standby pump characterized in that by stopping and entering a standby state, full-speed standby operation is possible without external control. 2. The full-speed standby pump according to claim 1, wherein in a vertical shaft pump with a small diameter and shallow submergence, the through hole provided on the inlet side of the impeller is provided near the inlet where the flow velocity of the suction pipe is slow. . 3. The full-speed standby pump according to claim 1, characterized in that in a vertical shaft pump with a large diameter and deeply submerged in water, a restriction is provided in the through hole of the suction pipe.
JP1989050221U 1989-05-01 1989-05-01 Full-speed standby operation pump Expired - Lifetime JP2524872Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989050221U JP2524872Y2 (en) 1989-05-01 1989-05-01 Full-speed standby operation pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989050221U JP2524872Y2 (en) 1989-05-01 1989-05-01 Full-speed standby operation pump

Publications (2)

Publication Number Publication Date
JPH02141695U true JPH02141695U (en) 1990-11-29
JP2524872Y2 JP2524872Y2 (en) 1997-02-05

Family

ID=31568586

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989050221U Expired - Lifetime JP2524872Y2 (en) 1989-05-01 1989-05-01 Full-speed standby operation pump

Country Status (1)

Country Link
JP (1) JP2524872Y2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000027788A (en) * 1998-07-15 2000-01-25 Hitachi Ltd Method for operating vertical shaft pump, and vertical shaft pump
JP2021014815A (en) * 2019-07-12 2021-02-12 株式会社石垣 Pump gate using vertical shaft submerged pump

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0278791A (en) * 1988-09-14 1990-03-19 Hitachi Ltd Vertical shaft pump

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0278791A (en) * 1988-09-14 1990-03-19 Hitachi Ltd Vertical shaft pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000027788A (en) * 1998-07-15 2000-01-25 Hitachi Ltd Method for operating vertical shaft pump, and vertical shaft pump
JP2021014815A (en) * 2019-07-12 2021-02-12 株式会社石垣 Pump gate using vertical shaft submerged pump

Also Published As

Publication number Publication date
JP2524872Y2 (en) 1997-02-05

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term