JPS57195887A - Water cutoff relay with incorporated overflow alarm unit - Google Patents

Water cutoff relay with incorporated overflow alarm unit

Info

Publication number
JPS57195887A
JPS57195887A JP7932881A JP7932881A JPS57195887A JP S57195887 A JPS57195887 A JP S57195887A JP 7932881 A JP7932881 A JP 7932881A JP 7932881 A JP7932881 A JP 7932881A JP S57195887 A JPS57195887 A JP S57195887A
Authority
JP
Japan
Prior art keywords
alarm unit
water
overflow alarm
overflow
relay
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.)
Pending
Application number
JP7932881A
Other languages
Japanese (ja)
Inventor
Yoshihiko Yamamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7932881A priority Critical patent/JPS57195887A/en
Publication of JPS57195887A publication Critical patent/JPS57195887A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

PURPOSE:To attain a major cost decrease by integrating a overlfow alarm unit and a water cutoff relay so that the product can be made compact and the number of parts can be reduced remarkably. CONSTITUTION:When the water level rises to reach near a overflow port 10, a float 4 which has been so far responding freely to the water level is fixed by the section of a retaining ring 6 of a contact bar 3, then the added buoyancy of floats a, b pushes a stem 11 of a relay section 1. As a result, the pushing pressure, surpassing a resisting power of a spring 14, further raises the stem 11, which has been positioned at the middle point of a switch 12 in a normal operation, so that it pushes the button of a microswitch b13 and turns an overflow alarm unit 15 on. The overflow alarm unit 15 is connected to a buzzer for reporting, and a solenoid valve is provided on a water pipe connected to a pole tap 9 so as to cutoff the water feeding. Thus, by integrating the overflow alarm unit 15 and the water cutoff relay 1, the product can be made compact and the number of parts can be reduced remarkably.
JP7932881A 1981-05-27 1981-05-27 Water cutoff relay with incorporated overflow alarm unit Pending JPS57195887A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7932881A JPS57195887A (en) 1981-05-27 1981-05-27 Water cutoff relay with incorporated overflow alarm unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7932881A JPS57195887A (en) 1981-05-27 1981-05-27 Water cutoff relay with incorporated overflow alarm unit

Publications (1)

Publication Number Publication Date
JPS57195887A true JPS57195887A (en) 1982-12-01

Family

ID=13686814

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7932881A Pending JPS57195887A (en) 1981-05-27 1981-05-27 Water cutoff relay with incorporated overflow alarm unit

Country Status (1)

Country Link
JP (1) JPS57195887A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6017280A (en) * 1984-06-11 1985-01-29 Matsushita Electric Ind Co Ltd Pump unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6017280A (en) * 1984-06-11 1985-01-29 Matsushita Electric Ind Co Ltd Pump unit

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