Title:
フロート式レベルスイッチユニット及びそれを備えた原水槽
Document Type and Number:
Japanese Patent JP7440873
Kind Code:
B2
Abstract:
To provide (i) a float-type level switch unit having a simple configuration and (ii) a raw water tank equipped with the same, so that there is no risk of backflow of wastewater resulting from malfunction of raw water pumps, even when a level switch is entangled with oil lumps contained in wastewater due to long-term use.SOLUTION: There is provided a float-type level switch unit installed in a raw water tank 1 equipped with two raw water pumps, in which four level switches consisting of a level switch 2 for stopping the raw water pump, a level switch 3 for starting one raw water pump, a level switch 4 for starting two raw water pumps simultaneously, and a level switch for alarming 5 are arranged in the tank 1 at appropriate intervals in the vertical direction from bottom to top. The level switch for alarming 5 is installed such that the lower turning end level of a float 9 thereof is above the normal maximum water level of the raw water tank 1.SELECTED DRAWING: Figure 1
Inventors:
Masayuki Asaki
Masaki Ishikawa
Kenichiro Hosoyama
Masaki Ishikawa
Kenichiro Hosoyama
Application Number:
JP2022063036A
Publication Date:
February 29, 2024
Filing Date:
April 05, 2022
Export Citation:
Assignee:
Nexeria East Japan Co., Ltd.
Nishihara Neo Co., Ltd.
Nishihara Neo Co., Ltd.
International Classes:
F04B49/025; C02F1/00; F04B49/04
Domestic Patent References:
| JP2008275369A | ||||
| JP6076664U | ||||
| JP2018076850A |
Foreign References:
| US20140366627 |
Attorney, Agent or Firm:
Haruo Saito
Takahiro Saito
Takahiro Saito