JPS5735175A - Automatic adjustment unit for amount of closing oil for concrete pump - Google Patents
Automatic adjustment unit for amount of closing oil for concrete pumpInfo
- 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
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
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)
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 |
-
1980
- 1980-08-06 JP JP10800880A patent/JPS5916106B2/en not_active Expired
Cited By (11)
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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