CN105605001A - Hydraulic safety valve set for closed winch - Google Patents

Hydraulic safety valve set for closed winch Download PDF

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Publication number
CN105605001A
CN105605001A CN201610152815.0A CN201610152815A CN105605001A CN 105605001 A CN105605001 A CN 105605001A CN 201610152815 A CN201610152815 A CN 201610152815A CN 105605001 A CN105605001 A CN 105605001A
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CN
China
Prior art keywords
valve
pressure
motor
logical
port
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Granted
Application number
CN201610152815.0A
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Chinese (zh)
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CN105605001B (en
Inventor
陈栋
叶建华
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Shanghai Zhenghua Heavy Industries Co Ltd
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Shanghai Zhenghua Heavy Industries Co Ltd
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Priority to CN201610152815.0A priority Critical patent/CN105605001B/en
Publication of CN105605001A publication Critical patent/CN105605001A/en
Application granted granted Critical
Publication of CN105605001B publication Critical patent/CN105605001B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C15/00Safety gear
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54Safety gear

Abstract

The invention discloses a hydraulic safety valve set for a closed winch. System composition is simple, safety protection on the closed pump-driven winch can be achieved, the function of the hydraulic safety valve set is equivalent to that of a balance valve in an open system and is also equivalent to that of a brake composed of a hydraulic valve, and safety protection is added for the closed winch. According to the technical scheme, based on the switch-on and switch-off characteristics of a logical valve, a hydraulic operated directional valve is used for controlling the pressure of a control port of the logical valve so as to control the switch-on and switch-off of the logical valve; after the winch stops, the logical valve is used for locking an oil way of the high-pressure side of a motor of the winch, and a check valve oil supplement circuit is arranged on the low-pressure side of the motor; after a brake is started, the oil supplement circuit is used for supplementing oil to the low-pressure side of the motor if a hook head descends slowly so that the risk that the hook head falls suddenly after oil on the low-pressure side leaks completely through the motor can be avoided.

Description

A kind of enclosed elevator deadweight safety valve group
Technical field
The present invention relates to Fluid Transmission and Control technology, relate in particular to a kind of enclosed elevator deadweight safety valve group.
Background technology
The crane that existing employing enclosed pump drives, if break down or when pipeline leakage need to overhaul, brakingDevice locking, at this moment brake bears very large power, and in safeguard protection, only has this one brake, because not havingThe protection of balanced valve in open system, so if surprisingly open brake or misfunctioning of brake after dead haltNot braking, gib head can fall, and has caused very large security risk.
Summary of the invention
Below provide the brief overview of one or more aspects so that the basic comprehension to these aspects to be provided. This general introductionDetailed the combining of the not all aspect contemplating look at, and neither is intended to point out out the key of all aspects or determinesQualitative key element is the non-scope of attempting to define any or all aspect also. Its unique object be will be in simplified form toSome concepts that go out one or more aspects are thought the order of the more detailed description providing after a while.
The object of the invention is to address the above problem, provide a kind of enclosed elevator deadweight safety valve group, systemComposition is simple, can realize the safeguard protection of the elevator winch of enclosed pump driving, is equivalent to balanced valve in open systemFunction, " brake " that is also equivalent to be formed by hydraulic valve, give enclosed elevator increased by one safeguard protection.
Technical scheme of the present invention is: the present invention has disclosed a kind of enclosed elevator deadweight safety valve group, valve group outsideConnecting motor, comprises hydraulic control switching valve, damping, logical valve, overflow valve, check valve, wherein overflow in valve groupThe high-pressure side of the first end connecting motor of valve, the low-pressure side of the second end connecting motor of overflow valve, of check valveOne end connects the second end of overflow valve, and the second end of check valve connects the repairing oil circuit for the repairing of motor low-pressure side,The first port of logical valve connects enclosed pump oil sources, and the second port of logical valve connects the first end of overflow valve, patrolsThe 3rd port of collecting valve connects pilot operated directional control valve by damping.
According to an embodiment of enclosed elevator deadweight safety valve group of the present invention, the first port of logical valve is as risingRise oil-in, the second port of logical valve is connected with the high-pressure side of motor, and the control of the 3rd port of logical valve is pressedPower derives from the second port of logical valve, to ensure the closing without leakage of the first port of logical valve.
According to an embodiment of enclosed elevator deadweight safety valve group of the present invention, check valve is positioned at the low-pressure side of motor,Form check valve feed circuit, the low-pressure side of motor obtains repairing by check valve feed circuit.
According to an embodiment of enclosed elevator deadweight safety valve group of the present invention, by pilot operated directional control valve and damping controlThe pressure of the 3rd port of logical valve processed, with the keying of control logic valve, after elevator stops, logical valve blocksThe on high-tension side oil circuit of hoist motor.
According to an embodiment of enclosed elevator deadweight safety valve group of the present invention, logical valve uses as balanced valve,Or use as hydraulic braking.
The present invention contrasts prior art following beneficial effect: the present invention is applicable to the liquid that adopts enclosed pump to drivePressing system, valve group is equivalent to the balanced valve function in open system. Valve group has the function of brake, even winchBrake is all opened, and gib head also can not fall suddenly. By suitable connection, can realize brake and open rear hookSlow decreasing or do not decline.
Brief description of the drawings
Fig. 1 shows the structure chart of the preferred embodiment of enclosed elevator deadweight safety valve group of the present invention.
Detailed description of the invention
After reading in conjunction with the following drawings the detailed description of embodiment of the present disclosure, this can be understood betterBright above-mentioned feature and advantage. In the accompanying drawings, each assembly is not necessarily drawn in proportion, and has similarlyThe assembly of correlation properties or feature may have identical or close Reference numeral.
Fig. 1 shows the structure of the preferred embodiment of enclosed elevator deadweight safety valve group of the present invention. Refer to figure1, the outside connecting motor 6 of the enclosed elevator deadweight safety valve group of the present embodiment, in valve group, comprise hydraulic control switching valve 1,Damping 2, logical valve 3, overflow valve 4, check valve 5. The B1 mouth of valve group connects the low-pressure side of motor 6, A1 mouthConnect the high-pressure side of motor 6. The A mouth of valve group and B mouth connect enclosed pump oil sources, and S mouth connects repairing oil circuit for motorLow-pressure side repairing, T mouth connected tank, X mouth connects oil circuit control. The height of the first end connecting motor 6 of overflow valve 4Press side, the low-pressure side of the second end connecting motor 6 of overflow valve 4. The first end of check valve 5 connects overflow valve 4The second end, the second end of check valve 5 connects for the repairing oil circuit S of motor low-pressure side repairing. Logical valve 3The first port LA connect enclosed pump oil sources A, the second port LB of logical valve 3 connects first of overflow valve 4End, the 3rd port x 2 of logical valve 3 connects pilot operated directional control valve 1 by damping 2.
The design principle of the valve group of the present embodiment is as follows. Utilize the keying feature of logical valve 3, use liquid controlled reversingThe control mouth (the 3rd port x 2) of valve 1 control logic valve 3 thus the keying of pressure control logic valve 3, volumeAfter raising and stopping, utilizing logical valve 3 to block the on high-tension side oil circuit of hoist motor. And in motor low-pressure side, list is setTo valve 5 feed circuits, when opening after brake, if gib head slow decreasing by feed circuit to motor low pressureSide repairing, prevents that low-pressure side oil from leaking by motor the risk that gib head falls suddenly after oil leakage light. Logical valve 3 is logicalCross the function use that balanced valve in open system is used as in suitable connection, be also equivalent to liquid braking device and play braking workCan (having increased by one safety arrestment to system), alleviated the burden of brake simultaneously.
In the time that elevator winch is out of service, the control oil sources off-load of valve group X mouth. The LA mouth conduct of logical valve 3The oil-in that hoists, LB mouth is connected with motor high-pressure side, and the controlled pressure of the control mouth X2 of logical valve 3 derives fromLB mouth. Now LA mouth is to LB mouth one-way conduction, and LB mouth is closed without leakage to LA mouth.
Providing previous description of the present disclosure is for making any person skilled in the art all can make or use thisOpen. To be all apparent for a person skilled in the art to various amendments of the present disclosure, and hereinDefined generic principles can be applied to other variants and can not depart from spirit or scope of the present disclosure. Thus,The disclosure is not intended to be defined to example described herein and design, but should be awarded and institute hereinThe widest scope that disclosed principle and novel features are consistent.

Claims (5)

1. an enclosed elevator deadweight safety valve group, is characterized in that, the outside connecting motor of valve group (6), valve groupInside comprise hydraulic control switching valve (1), damping (2), logical valve (3), overflow valve (4), check valve (5), itsThe high-pressure side of the first end connecting motor (6) of middle overflow valve (4), the second end connecting motor of overflow valve (4)(6) low-pressure side, the first end of check valve (5) connects the second end of overflow valve (4), check valve (5)The second end connect for the repairing oil circuit of motor low-pressure side repairing, the first port of logical valve (3) connects enclosedPump oil sources, the second port of logical valve (3) connects the first end of overflow valve (4), the 3rd of logical valve (3)Port connects pilot operated directional control valve (1) by damping (2).
2. enclosed elevator deadweight safety valve group according to claim 1, is characterized in that logical valve (3)The first port as the oil-in that hoists, the second port of logical valve (3) is connected with the high-pressure side of motor (6),The controlled pressure of the 3rd port of logical valve (3) derives from the second port of logical valve (3), to ensure logicClosing without leakage of the first port of valve (3).
3. enclosed elevator deadweight safety valve group according to claim 1, is characterized in that check valve (5)Be positioned at the low-pressure side of motor (6), form check valve feed circuit, the low-pressure side of motor (6) is passed through check valveFeed circuit obtains repairing.
4. enclosed elevator deadweight safety valve group according to claim 1, is characterized in that, changes by hydraulic controlTo the pressure of the 3rd port of valve (1) and damping (2) control logic valve (3), with control logic valve (3)Keying, after elevator stops, logical valve (3) blocks hoist motor on high-tension side oil circuit.
5. according to the enclosed elevator deadweight safety valve group described in any one in claim 1 to 4, it is characterized in that,Logical valve (3) uses as balanced valve, or uses as hydraulic braking.
CN201610152815.0A 2016-03-17 2016-03-17 A kind of enclosed elevator hydraulic safe valve group Active CN105605001B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610152815.0A CN105605001B (en) 2016-03-17 2016-03-17 A kind of enclosed elevator hydraulic safe valve group

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610152815.0A CN105605001B (en) 2016-03-17 2016-03-17 A kind of enclosed elevator hydraulic safe valve group

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CN105605001A true CN105605001A (en) 2016-05-25
CN105605001B CN105605001B (en) 2017-08-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107676316A (en) * 2017-11-07 2018-02-09 燕山大学 A kind of braking control system and control method applied to hydraulic open system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000186704A (en) * 1998-12-22 2000-07-04 Yutani Heavy Ind Ltd Return oil circuit for hydraulic circuit
US6253658B1 (en) * 1998-11-25 2001-07-03 Kayaba Industry Co., Ltd. Hydraulic control system
CN101537984A (en) * 2009-04-21 2009-09-23 上海三一科技有限公司 Hoist motor closed type hydraulic system for preventing pipelines from bursting and control method thereof
CN102900718A (en) * 2012-09-28 2013-01-30 徐工集团工程机械股份有限公司 Changeover valve device for hydraulic system and hydraulic system for crawler crane
CN104477798A (en) * 2014-12-10 2015-04-01 中联重科股份有限公司 Amplitude-variable control system of main arm of crane and crane
CN205401279U (en) * 2016-03-17 2016-07-27 上海振华重工(集团)股份有限公司 Closed hoist deadweight safety valve group

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6253658B1 (en) * 1998-11-25 2001-07-03 Kayaba Industry Co., Ltd. Hydraulic control system
JP2000186704A (en) * 1998-12-22 2000-07-04 Yutani Heavy Ind Ltd Return oil circuit for hydraulic circuit
CN101537984A (en) * 2009-04-21 2009-09-23 上海三一科技有限公司 Hoist motor closed type hydraulic system for preventing pipelines from bursting and control method thereof
CN102900718A (en) * 2012-09-28 2013-01-30 徐工集团工程机械股份有限公司 Changeover valve device for hydraulic system and hydraulic system for crawler crane
CN104477798A (en) * 2014-12-10 2015-04-01 中联重科股份有限公司 Amplitude-variable control system of main arm of crane and crane
CN205401279U (en) * 2016-03-17 2016-07-27 上海振华重工(集团)股份有限公司 Closed hoist deadweight safety valve group

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107676316A (en) * 2017-11-07 2018-02-09 燕山大学 A kind of braking control system and control method applied to hydraulic open system

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