JPH0325889U

JPH0325889U -

Info

Publication number: JPH0325889U
Application number: JP8541689U
Authority: JP
Priority date: 1989-07-20
Filing date: 1989-07-20
Publication date: 1991-03-18
Anticipated expiration: 2004-07-20
Also published as: JPH0736145Y2

Description

[Brief explanation of drawings]

第１図は、本考案の立軸ポンプの第１の実施例
の縦断面図であり、第２図は、水位とポンプの運
転状態と落水弁開度を示す図であり、第３図は、
本考案の立軸ポンプの第２の実施例の要部縦断面
図であり、第４図は、本考案の立軸ポンプの第３
の実施例の縦断面図であり、第５図は、本考案の
立軸ポンプの第４の実施例の縦断面図であり、第
６図は、本考案の立軸ポンプの第５の実施例の要
部縦断面図であり、第７図は、本考案の立軸ポン
プの第６の実施例の要部縦断面図であり、第８図
は、従来の立軸ポンプで揚水管から落水しない状
態の縦断面図である。１…吸込ベルマウス、２…水位、３…羽根車ケ
ーシング、５…羽根車、１０…落水孔、１１…落
水用配管、１２，２０，３０…落水弁、１６…ば
ね、４０…水位検出手段、５１…圧力検出手段、
７０…吸気孔、７１…吸気用配管、７２…吸気弁
。 FIG. 1 is a vertical cross-sectional view of the first embodiment of the vertical shaft pump of the present invention, FIG. 2 is a diagram showing the water level, the operating state of the pump, and the opening of the drop valve, and FIG.
FIG. 4 is a vertical sectional view of the main part of the second embodiment of the vertical shaft pump of the present invention, and FIG.
FIG. 5 is a longitudinal sectional view of a fourth embodiment of the vertical shaft pump of the present invention, and FIG. 6 is a longitudinal sectional view of the fifth embodiment of the vertical shaft pump of the present invention. FIG. 7 is a vertical cross-sectional view of the main part of the sixth embodiment of the vertical shaft pump of the present invention, and FIG. 8 is a vertical cross-sectional view of the main part of the sixth embodiment of the vertical shaft pump of the present invention. FIG. DESCRIPTION OF SYMBOLS 1... Suction bell mouth, 2... Water level, 3... Impeller casing, 5... Impeller, 10... Falling hole, 11... Falling water piping, 12, 20, 30... Falling valve, 16... Spring, 40... Water level detection means , 51...pressure detection means,
70...Intake hole, 71...Intake piping, 72...Intake valve.

Claims

[Claims for Utility Model Registration] 1. A water drop hole is bored in an impeller casing that houses an impeller at a position higher than the impeller, and this water hole is communicated with the outside of the impeller casing via a water drop valve that can be opened and closed. and the vertical shaft pump is configured to control opening and closing of the drop valve according to the discharge pressure of the impeller within the impeller casing. 2. The vertical shaft pump according to claim 1, wherein the water suction well is provided with water level detection means for detecting the water level, and instead of controlling the opening and closing of the water drop valve according to the discharge pressure, the water water drop valve is controlled according to the water level of the water intake well. A vertical shaft pump characterized by being configured to control opening and closing. 3. A drop hole is bored at a position higher than the impeller in the impeller casing that houses the impeller, and the drop hole is communicated with the outside of the impeller casing via a drop valve that can be opened and closed, and the lower end of the impeller casing is An intake hole is bored at a position near the impeller inlet level of a suction bell mouth connected to the intake well, and this intake hole is communicated with the outside of the suction bell mouth via an intake valve that can be opened and closed to detect the water level in the water intake well. 1. A vertical shaft pump, characterized in that a water level detecting means is provided, and the falling water valve and the intake valve are controlled to open and close in accordance with the water level of the water intake well.