Title:
METHOD AND DEVICE FOR CONTROLLING LIQUID LEVEL
Document Type and Number:
Japanese Patent JPS5850011
Kind Code:
A
Abstract:
PURPOSE:To prevent the flow-out of sludge from a sedimentation basin, by controlling the liquid level of a lower layer independently of the liquid level of a lower layer in the sedimentation basin for sewage disposal. CONSTITUTION:When a boundary 13 of a sludge unseparated liquid layer 12 in a sedimentation basin 5 does not reach a detector 7, a flow-in tank controlling circuit 15 of an ordinary flow-in tank 1 is operated, and the operation of a pump is controlled by a low-level/high-level switch 2. When this layer 12 rises and the boundary 13 shields a phototransistor 8 and a light source 10, a relay is turned on, and a motor operation controlling circuit 16 is switched to a circuit passing through an FF. If a phototransistor 8' and a light source 10' of a high-level detector 17 are not shielded by the layer 12, the relay contact is turned on. Thus, the relay contact is intermittently turned on and off repeatedly to operate the pump intermittently, thereby preventing the unlimited rise of the layer 12.
Inventors:
MORIYA TOSHIZOU
Application Number:
JP14786981A
Publication Date:
March 24, 1983
Filing Date:
September 21, 1981
Export Citation:
Assignee:
FURUHATA SAKAE
MORIYA TOSHIZOU
MORIYA TOSHIZOU
International Classes:
B01D21/30; G05D9/12; (IPC1-7): B01D21/24; G05D9/00
Domestic Patent References:
| JP52110766B |
Attorney, Agent or Firm:
Koya Konno