JPS5735175A - Automatic adjustment unit for amount of closing oil for concrete pump - Google Patents

Automatic adjustment unit for amount of closing oil for concrete pump

Info

Publication number
JPS5735175A
JPS5735175A JP10800880A JP10800880A JPS5735175A JP S5735175 A JPS5735175 A JP S5735175A JP 10800880 A JP10800880 A JP 10800880A JP 10800880 A JP10800880 A JP 10800880A JP S5735175 A JPS5735175 A JP S5735175A
Authority
JP
Japan
Prior art keywords
amount
closing oil
oil
lead switch
sustained
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.)
Granted
Application number
JP10800880A
Other languages
Japanese (ja)
Other versions
JPS5916106B2 (en
Inventor
Shintaro Senda
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.)
Niigata Engineering Co Ltd
Original Assignee
Niigata Engineering 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 Niigata Engineering Co Ltd filed Critical Niigata Engineering Co Ltd
Priority to JP10800880A priority Critical patent/JPS5916106B2/en
Publication of JPS5735175A publication Critical patent/JPS5735175A/en
Publication of JPS5916106B2 publication Critical patent/JPS5916106B2/en
Expired legal-status Critical Current

Links

Landscapes

  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Reciprocating Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To easily adjust the amount of plugged oil by detecting the upper and lower dead centers of an oil hydraulic piston and thereby automatically adjusting the amount of closing oil of a two row-hydraulic reciprocating concrete transfer pump properly.
CONSTITUTION: When a pushbutton switch PB is depressed while a pump, constant open contacts Ra1W3 are self-sustained. When a piston reaches the lower dead center, a lead switch Lsa is turned on by the action of a magnet 11c or 11d in a cylinder, and an electric current flows to a secondary relay Rb. Constant open contacts Rb1 to Rb2 are also self-sustained. A solenoid valve SOL is opened and a pilot check valve 12 is actuated, thereby discharging closing oil. When the amount of closing oil is decreased and the pistons 11a and 11b come to the upper dead center, a lead switch Lsb or a lead switch Lsc is turned on by the action of the magnets 11c and 11d, thereby turning off the solenoid valve SOL and stopping the discharge of the closing oil for the pilot check valve 12.
COPYRIGHT: (C)1982,JPO&Japio
JP10800880A 1980-08-06 1980-08-06 Automatic adjustment device for concrete pump oil closing amount Expired JPS5916106B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10800880A JPS5916106B2 (en) 1980-08-06 1980-08-06 Automatic adjustment device for concrete pump oil closing amount

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10800880A JPS5916106B2 (en) 1980-08-06 1980-08-06 Automatic adjustment device for concrete pump oil closing amount

Publications (2)

Publication Number Publication Date
JPS5735175A true JPS5735175A (en) 1982-02-25
JPS5916106B2 JPS5916106B2 (en) 1984-04-13

Family

ID=14473644

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10800880A Expired JPS5916106B2 (en) 1980-08-06 1980-08-06 Automatic adjustment device for concrete pump oil closing amount

Country Status (1)

Country Link
JP (1) JPS5916106B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57104003U (en) * 1980-12-18 1982-06-26
JPS57137702A (en) * 1981-02-16 1982-08-25 Mitsubishi Heavy Ind Ltd Automatic adjusting device of piston stroke of double row double-acting type hydraulic cylinder
JPS58144081U (en) * 1982-03-24 1983-09-28 石川島播磨重工業株式会社 Concrete pump hydraulic cylinder stroke automatic adjustment device
JPS59105065U (en) * 1982-12-29 1984-07-14 石川島播磨重工業株式会社 Sealed circuit oil replenishment device for reciprocating pumps
CN104454709A (en) * 2014-10-21 2015-03-25 安徽星马专用汽车有限公司 Concrete pumping equipment and reversing method for pumping oil cylinder of concrete pumping equipment
CN104533860A (en) * 2014-12-26 2015-04-22 三一汽车制造有限公司 Pumping mechanism oil supplementing control system and concrete pumping machine
CN112144881A (en) * 2020-09-24 2020-12-29 广州奕极机电科技有限公司 Construction machinery hand is with mixing earth clearance ware
KR20210060889A (en) 2019-11-19 2021-05-27 주식회사 현대에버다임 Pumping system of drive cylinder to concrete pump truck

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57104003U (en) * 1980-12-18 1982-06-26
JPS6337499Y2 (en) * 1980-12-18 1988-10-04
JPS57137702A (en) * 1981-02-16 1982-08-25 Mitsubishi Heavy Ind Ltd Automatic adjusting device of piston stroke of double row double-acting type hydraulic cylinder
JPS6233443B2 (en) * 1981-02-16 1987-07-21 Mitsubishi Heavy Ind Ltd
JPS58144081U (en) * 1982-03-24 1983-09-28 石川島播磨重工業株式会社 Concrete pump hydraulic cylinder stroke automatic adjustment device
JPS59105065U (en) * 1982-12-29 1984-07-14 石川島播磨重工業株式会社 Sealed circuit oil replenishment device for reciprocating pumps
CN104454709A (en) * 2014-10-21 2015-03-25 安徽星马专用汽车有限公司 Concrete pumping equipment and reversing method for pumping oil cylinder of concrete pumping equipment
CN104533860A (en) * 2014-12-26 2015-04-22 三一汽车制造有限公司 Pumping mechanism oil supplementing control system and concrete pumping machine
KR20210060889A (en) 2019-11-19 2021-05-27 주식회사 현대에버다임 Pumping system of drive cylinder to concrete pump truck
CN112144881A (en) * 2020-09-24 2020-12-29 广州奕极机电科技有限公司 Construction machinery hand is with mixing earth clearance ware
CN112144881B (en) * 2020-09-24 2021-05-07 广州奕极机电科技有限公司 Construction machinery hand is with mixing earth clearance ware

Also Published As

Publication number Publication date
JPS5916106B2 (en) 1984-04-13

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