JPS55156283A - Operation control circuit of storage pump - Google Patents

Operation control circuit of storage pump

Info

Publication number
JPS55156283A
JPS55156283A JP6273179A JP6273179A JPS55156283A JP S55156283 A JPS55156283 A JP S55156283A JP 6273179 A JP6273179 A JP 6273179A JP 6273179 A JP6273179 A JP 6273179A JP S55156283 A JPS55156283 A JP S55156283A
Authority
JP
Japan
Prior art keywords
storage pump
closed
pump
contact point
case
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
JP6273179A
Other languages
Japanese (ja)
Inventor
Hiroshi Kusumi
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 Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co 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 Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP6273179A priority Critical patent/JPS55156283A/en
Publication of JPS55156283A publication Critical patent/JPS55156283A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To improve security of a storage pump and prevent reduction of its operation efficiency by controlling the storage pump to halt in case of insufficient priming at start of the pump or the continue its operation even when pumped water is cut off.
CONSTITUTION: In case of insufficient priming from improper operation, or clogging of a storage pump, a contact point T3a is closed because a conduit will not opened at the predetermined time of a limit timer T3. As a contact point T1a has been closed, a storage pump 1 is automatically stopped, thereby to improve security. In case of reduction of flow rate from false operation, a limit switch IS is temporally closed to electrify the limit timer T3. However, its contact point is not directly closed. Opening an intake port within the predetermined time of the timer opens the limit switch LS, which feasible to work the storage pump 1 sequentially.
COPYRIGHT: (C)1980,JPO&Japio
JP6273179A 1979-05-23 1979-05-23 Operation control circuit of storage pump Pending JPS55156283A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6273179A JPS55156283A (en) 1979-05-23 1979-05-23 Operation control circuit of storage pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6273179A JPS55156283A (en) 1979-05-23 1979-05-23 Operation control circuit of storage pump

Publications (1)

Publication Number Publication Date
JPS55156283A true JPS55156283A (en) 1980-12-05

Family

ID=13208799

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6273179A Pending JPS55156283A (en) 1979-05-23 1979-05-23 Operation control circuit of storage pump

Country Status (1)

Country Link
JP (1) JPS55156283A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03281999A (en) * 1990-03-30 1991-12-12 Hitachi Ltd Pump device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03281999A (en) * 1990-03-30 1991-12-12 Hitachi Ltd Pump device

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