CN102942117A - Handle inhibition protection system for condition with lowering of empty hook of crane - Google Patents
Handle inhibition protection system for condition with lowering of empty hook of crane Download PDFInfo
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- CN102942117A CN102942117A CN2012104697190A CN201210469719A CN102942117A CN 102942117 A CN102942117 A CN 102942117A CN 2012104697190 A CN2012104697190 A CN 2012104697190A CN 201210469719 A CN201210469719 A CN 201210469719A CN 102942117 A CN102942117 A CN 102942117A
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- electromagnetic valve
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- lowering
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Abstract
The invention relates to a handle inhibition protection system for a condition with lowering of an empty hook of a crane. The handle inhibition protection system consists of a control circuit and a hydraulic system and comprises an empty hook lowering button, a relay, an empty hook lowering enabling/disabling solenoid valve, a clutch enabling/disabling solenoid valve, a winch lifting limitation solenoid valve and a winch lowering limitation solenoid valve. The solenoid valves are energized at the same time through actions of contacts of the relay to make the handle fail, and the purpose of safety protection of handle inhibition can be achieved. When the condition with the empty hook is released, the winch lowering limitation solenoid valve is de-energized, and operation of the handle can be restored. Error operations of operating personnel can be avoided, hidden safety risks can be reduced, and the safety of the empty hook system can be improved. Moreover, prior to implementation of actions of the empty hook, actions of a main winch and an auxiliary winch are inhibited, that is, the output shaft is static, static friction between friction plates of a clutch can be ensured, and the service life of the friction plates can be prolonged.
Description
One, technical field
The handle that the present invention relates under a kind of hoisting crane hollow hook lowering operating mode is forbidden protection system, at hollow hook lowering operating mode lower handle quiescing actuating unit, reaches the purpose of safety guard-safeguard.
Two, background technology
The problem that exists under the existing hoisting crane hollow hook lowering operating mode is: when the hollow hook lowering action executing, power-transfer clutch is in disengaged position, and pilot handle is not under an embargo, and operating personal still can operate, and causes the accident easily.And before having the hollow hook lowering action executing, be dynamic friction between power-transfer clutch and the friction lining, shortened like this life-span of friction lining.
Three, summary of the invention
The handle that the purpose of this invention is to provide under a kind of hoisting crane hollow hook lowering operating mode is forbidden protection system; to solve the in actual applications problem of maloperation of traditional form; thereby reduce the generation of the safety misadventure that causes because of throw-out-of clutch; and before the hollow hook lowering action executing; static friction completely between power-transfer clutch and the friction lining, the life-span of having improved friction lining.
The technical solution used in the present invention is: the handle under the hoisting crane hollow hook lowering operating mode forbids that protection system is comprised of control circuit and hydraulic efficiency pressure system, comprises that in hydraulic efficiency pressure system hollow hook lowering electromagnetic valve, power-transfer clutch enable/forbid electromagnetic valve, the spacing electromagnetic valve of hoisting and elevator descending spacing electromagnetic valve.Control circuit is to succeed electric apparatus coil K by hollow hook lowering button Sb by power supply respectively behind fuse FU, K.1 connect hollow hook lowering electromagnetic valve coil Y2 and power-transfer clutch in parallel by relay contact and enable/forbid electromagnetic valve coil Y3, K.2 meet elevator descending spacing electromagnetic valve coil Y1 by relay contact, K.3 meet the spacing electromagnetic valve coil Y4 of hoisting by relay contact; Relay coil K and electromagnetic valve coil Y1, Y2, Y3, Y4 other end ground connection.On relay coil K and electromagnetic valve coil Y1, Y2, Y3, Y4 respectively and be connected to flywheel diode V1, V2, V3, V4.
The present invention sets up sky hook master cock Sb and relay K in control circuit, by relay contact K.1, K.2, K.3 make hollow hook lowering electromagnetic valve coil Y2, power-transfer clutch enable/forbid electromagnetic valve coil Y3, the spacing electromagnetic valve coil Y4 of hoisting, elevator descending spacing electromagnetic valve coil Y1 simultaneously electric, simultaneously in hydraulic efficiency pressure system, caliper brake and reductor braking device oil circuit are kept apart, utilize the spacing electromagnetic valve of hoisting, elevator descending spacing electromagnetic valve to get the electric handle action inefficacy that makes, just can reach the purpose that handle is forbidden safety guard-safeguard; When empty hook operating mode was removed, elevator was transferred spacing electromagnetic valve dead electricity, and handle is just resumed work.
The present invention can prevent the operating personal misoperation, reduces the generation of potential safety hazard, has improved empty hook Security of the system.And before carrying out empty hook action, the action of major-minor elevator is forbidden, and namely output shaft is static, has guaranteed between the clutch-lining it is static friction, can improve like this life-span of friction lining.
Four, description of drawings
Fig. 1 is schematic circuit diagram of the present invention;
Fig. 2 is hydraulic system principle figure of the present invention.
Five, the specific embodiment
Handle under the hoisting crane hollow hook lowering operating mode forbids that protection system is comprised of control circuit and hydraulic efficiency pressure system, control circuit is to succeed electric apparatus coil K by hollow hook lowering button Sb by power supply respectively behind fuse FU, K.1 connect hollow hook lowering electromagnetic valve coil Y2 and power-transfer clutch in parallel by relay contact and enable/forbid electromagnetic valve coil Y3, K.2 meet elevator descending spacing electromagnetic valve coil Y1 by relay contact, K.3 meet the spacing electromagnetic valve coil Y4 of hoisting by relay contact; On relay coil K and electromagnetic valve coil Y1, Y2, Y3, Y4 respectively and be connected to flywheel diode V1, V2, V3, V4, relay coil K and electromagnetic valve coil Y1, Y2, Y3, Y4 other end ground connection.
Hydraulic efficiency pressure system connects main safety valve 15 oil inlets and multiple directional control valve 13 oil inlets by plunger main pump 16 oil outlets, guide's gear type pump 2 oil outlets connect the oil inlet of check valve and filter 3, the oil outlet of check valve and filter 3 connects the oil inlet of guide's reducing valve 4, the oil outlet of guide's reducing valve 4 connects the oil inlet of pilot handle control cock 5, be lifted out hydraulic fluid port through pilot handle control cock 5 and connect spacing electromagnetic valve 6 oil inlets of hoisting, pilot handle control cock 5 decline oil outlets connect elevator descending spacing electromagnetic valve 14 oil inlets, fuel-displaced connection shuttle valve 7 oil inlets that the spacing electromagnetic valve 6 of hoisting is connected with elevator descending spacing electromagnetic valve, shuttle valve 7 oil outlets are received reductor braking device oil cylinder, then the oil outlet of the spacing electromagnetic valve 6 of hoisting and elevator descending spacing electromagnetic valve 14 is received respectively multiple directional control valve 13 again and is promoted port for drawdown, multiple directional control valve 13 promotes mouthful A and port for drawdown B connecting balanced valve 12 and motor 11 and promotes port for drawdown, the oil outlet of check valve and filter 3 connects the oil inlet of sky hook by pass valve 1 oil inlet and hollow hook lowering electromagnetic valve 8, the oil outlet of hollow hook lowering electromagnetic valve 8 connects power-transfer clutch and enables/forbid electromagnetic valve 9 oil inlets, power-transfer clutch is enabled/is forbidden electromagnetic valve 9 oil outlets and connects power-transfer clutch and braking Foot braking valve 10 oil inlets, and braking Foot braking valve 10 oil outlets connect the caliper brake oil cylinder.
Hollow hook lowering button Sb is placed on the interior control panel of operator's compartment or on the pilot handle, when device operator will operate the hollow hook lowering action, at first press the hollow hook lowering button Sb that is positioned on the operator's compartment control panel or on the pilot handle, relay coil K gets electric, relay normally open contact K.1, K.2, K.3 action, and step on braking Foot braking valve 10 in the hydraulic efficiency pressure system, according to above-mentioned electrical principle, K.1 open contact is closed, connect Y2, the Y3 electromagnetic valve coil, namely electromagnetic valve 8 is enabled/forbidden to hollow hook lowering, electromagnetic valve 9 actions are enabled/forbidden to power-transfer clutch, hoisting speed reducer throw-out-of clutch, caliper brake clamp and make the elevator braking; K.2 open contact is closed, connects the Y1 electromagnetic valve coil, i.e. the pilot handle oil circuit is cut off in elevator descending spacing electromagnetic valve 14 actions, so that the down maneuver of elevator lost efficacy, prevents misoperation, reduces hidden danger; K.3 open contact is closed, connects the Y3 electromagnetic valve coil, i.e. the pilot handle oil circuit is cut off in spacing electromagnetic valve 6 actions of hoisting, so that the lifting of elevator action was lost efficacy, prevents misoperation, reduces hidden danger.
Claims (3)
1. the handle under the hoisting crane hollow hook lowering operating mode is forbidden protection system, formed by control circuit and hydraulic efficiency pressure system, in hydraulic efficiency pressure system, comprise the hollow hook lowering electromagnetic valve, electromagnetic valve is enabled/forbidden to power-transfer clutch, the spacing electromagnetic valve of hoisting and elevator descending spacing electromagnetic valve, it is characterized in that: control circuit is to succeed electric apparatus coil (K) by hollow hook lowering button (Sb) by power supply respectively behind fuse (FU), connect hollow hook lowering electromagnetic valve coil (Y2) and power-transfer clutch in parallel by relay contact (K.1) and enable/forbid electromagnetic valve coil (Y3), connect elevator descending spacing electromagnetic valve coil (Y1) by relay contact (K.2), connect the spacing electromagnetic valve coil of hoisting (Y4) by relay contact (K.3); Relay coil (K) and electromagnetic valve coil (Y1, Y2, Y3, Y4) other end ground connection.
2. the handle under the described hoisting crane hollow hook lowering operating mode is forbidden protection system according to claim 1, it is characterized in that: on relay coil (K) and electromagnetic valve coil (Y1, Y2, Y3, Y4) respectively and be connected to flywheel diode (V1, V2, V3, V4).
3. the handle under the described hoisting crane hollow hook lowering operating mode is forbidden protection system according to claim 1; it is characterized in that: hydraulic efficiency pressure system connects main safety valve (15) oil inlet and multiple directional control valve (13) oil inlet by plunger main pump (16) oil outlet; guide's gear type pump (2) oil outlet connects the oil inlet of check valve and filter (3); the oil outlet of check valve and filter (3) connects the oil inlet of guide's reducing valve (4); the oil outlet of guide's reducing valve (4) connects the oil inlet of pilot handle control cock (5); be lifted out hydraulic fluid port through pilot handle control cock (5) and connect the spacing electromagnetic valve of hoisting (6) oil inlet; pilot handle control cock (5) decline oil outlet connects elevator descending spacing electromagnetic valve (14) oil inlet; the spacing electromagnetic valve of hoisting (6) is connected 14 with elevator descending spacing electromagnetic valve) fuel-displaced connection shuttle valve (7) oil inlet; shuttle valve (7) oil outlet is received reductor braking device oil cylinder; then the oil outlet of the spacing electromagnetic valve of hoisting (6) and elevator descending spacing electromagnetic valve (14) is received respectively multiple directional control valve (13) again and is promoted port for drawdown; multiple directional control valve (13) promotes mouthful A and port for drawdown B connecting balanced valve (12) and motor (11) and promotes port for drawdown; the oil outlet of check valve and filter (3) connects the oil inlet of sky hook by pass valve (1) oil inlet and hollow hook lowering electromagnetic valve (8); the oil outlet of hollow hook lowering electromagnetic valve (8) connects power-transfer clutch enables/forbids electromagnetic valve (9) oil inlet; power-transfer clutch is enabled/is forbidden electromagnetic valve (9) oil outlet and connects power-transfer clutch and braking Foot braking valve (10) oil inlet, and braking Foot braking valve (10) oil outlet connects the caliper brake oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104697190A CN102942117A (en) | 2012-11-20 | 2012-11-20 | Handle inhibition protection system for condition with lowering of empty hook of crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104697190A CN102942117A (en) | 2012-11-20 | 2012-11-20 | Handle inhibition protection system for condition with lowering of empty hook of crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102942117A true CN102942117A (en) | 2013-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104697190A Pending CN102942117A (en) | 2012-11-20 | 2012-11-20 | Handle inhibition protection system for condition with lowering of empty hook of crane |
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| Country | Link |
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| CN (1) | CN102942117A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696996A (en) * | 2013-12-31 | 2014-04-02 | 太原重工股份有限公司 | Crane and hydraulic control system thereof |
| CN103723645A (en) * | 2014-01-20 | 2014-04-16 | 安徽柳工起重机有限公司 | Quick release winch control system of dynamic compactor |
| CN112357772A (en) * | 2020-11-20 | 2021-02-12 | 中船华南船舶机械有限公司 | Upper limiting method for lifting hook |
| CN113816290A (en) * | 2021-11-24 | 2021-12-21 | 徐工集团工程机械股份有限公司建设机械分公司 | Intelligent control valve and system for realizing heavy-load constant-speed lowering |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2194897Y (en) * | 1993-05-06 | 1995-04-19 | 沈国才 | Protecting device for mining hoist |
| JP2002128472A (en) * | 2000-10-24 | 2002-05-09 | Sumitomo Heavy Industries Construction Crane Co Ltd | Hydraulic circuit for mobile crane |
| CN2555382Y (en) * | 2002-06-28 | 2003-06-11 | 河南石油勘探局南阳石油机械厂 | Lifting system positioning brake device of petroleum drilling repairing equipment |
| CN202072410U (en) * | 2011-05-19 | 2011-12-14 | 青岛港（集团）有限公司 | Protective circuit and protective system capable of preventing lifting hook from falling |
| CN202296970U (en) * | 2011-08-14 | 2012-07-04 | 泰安创时代金港机械有限公司 | Idle hook landing clutching and braking system for caterpillar crane |
| CN202897902U (en) * | 2012-11-20 | 2013-04-24 | 抚顺起重机制造有限责任公司 | Protection system for preventing handle from working under crane empty-hook-lowering working condition |
-
2012
- 2012-11-20 CN CN2012104697190A patent/CN102942117A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2194897Y (en) * | 1993-05-06 | 1995-04-19 | 沈国才 | Protecting device for mining hoist |
| JP2002128472A (en) * | 2000-10-24 | 2002-05-09 | Sumitomo Heavy Industries Construction Crane Co Ltd | Hydraulic circuit for mobile crane |
| CN2555382Y (en) * | 2002-06-28 | 2003-06-11 | 河南石油勘探局南阳石油机械厂 | Lifting system positioning brake device of petroleum drilling repairing equipment |
| CN202072410U (en) * | 2011-05-19 | 2011-12-14 | 青岛港（集团）有限公司 | Protective circuit and protective system capable of preventing lifting hook from falling |
| CN202296970U (en) * | 2011-08-14 | 2012-07-04 | 泰安创时代金港机械有限公司 | Idle hook landing clutching and braking system for caterpillar crane |
| CN202897902U (en) * | 2012-11-20 | 2013-04-24 | 抚顺起重机制造有限责任公司 | Protection system for preventing handle from working under crane empty-hook-lowering working condition |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696996A (en) * | 2013-12-31 | 2014-04-02 | 太原重工股份有限公司 | Crane and hydraulic control system thereof |
| CN103723645A (en) * | 2014-01-20 | 2014-04-16 | 安徽柳工起重机有限公司 | Quick release winch control system of dynamic compactor |
| CN103723645B (en) * | 2014-01-20 | 2016-09-21 | 安徽柳工起重机有限公司 | Quick release winch control system of dynamic compactor |
| CN112357772A (en) * | 2020-11-20 | 2021-02-12 | 中船华南船舶机械有限公司 | Upper limiting method for lifting hook |
| CN113816290A (en) * | 2021-11-24 | 2021-12-21 | 徐工集团工程机械股份有限公司建设机械分公司 | Intelligent control valve and system for realizing heavy-load constant-speed lowering |
| CN113816290B (en) * | 2021-11-24 | 2022-02-18 | 徐工集团工程机械股份有限公司建设机械分公司 | Intelligent control valve and system for realizing heavy-load constant-speed lowering |
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Application publication date: 20130227 |