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Title:
METHOD AND DEVICE FOR AUTOMATIC CIRCULATION IN WASTE WATER PUMP STATION
Document Type and Number:
Japanese Patent JPH02252994
Kind Code:
A
Abstract:

PURPOSE: To secure the valve operation having high reliability with a simple structure by constituting a mixing valve provide so as to be communicated with a pump unit from a valve element to be operated through a diaphragm and for sealing a valve seat, in a pump station for partially constituting a municipal sewage device.

CONSTITUTION: In a submerged pump unit 2 connected to a pressure pipe 3, a mixing valve 6 is provided on a pump housing 4 having an inlet 5. This mixing valve 6 is provided with a cylindrical part 7 and an outlet nozzle 8, and a bellow 14 is provided so as to be communicated with the cylindrical part. The bellow 14 surrounds a valve cup 12, the valve cup 12 houses a diaphragm 11 having a valve ball 9, and the valve ball 9 closed the cylindrical part 7 when it is separated from the diaphragm 11 and pressed against a seat 10 of the cylindrical part 7. An opening 13 for allowing oil as a damping medium housed in the bellow 14 to flow is formed in a space between the valve cup 12 and the diaphragm 11.


Inventors:
FUORUKE RANDOKUISUTO
Application Number:
JP1344490A
Publication Date:
October 11, 1990
Filing Date:
January 23, 1990
Export Citation:
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Assignee:
FLAEKT AB
International Classes:
B01F5/02; B01F7/00; B01F15/02; E03F5/22; F04D13/16; F16K17/34; (IPC1-7): E03F5/22; F04D13/16; F16K17/34
Domestic Patent References:
JPS6439430A1989-02-09
JPS63161921U1988-10-21
JPS4946309U1974-04-23
JPS5828170U1983-02-23
Attorney, Agent or Firm:
Akira Asamura (3 outside)