CN103438037B - A kind of scissors type altitude job platform lifting and down maneuver hydraulic system - Google Patents

A kind of scissors type altitude job platform lifting and down maneuver hydraulic system Download PDF

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Publication number
CN103438037B
CN103438037B CN201310338150.9A CN201310338150A CN103438037B CN 103438037 B CN103438037 B CN 103438037B CN 201310338150 A CN201310338150 A CN 201310338150A CN 103438037 B CN103438037 B CN 103438037B
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CN
China
Prior art keywords
valve
elevating ram
throttle
directional control
solenoid directional
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Expired - Fee Related
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CN201310338150.9A
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Chinese (zh)
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CN103438037A (en
Inventor
岳奇
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Hunan Xingbang Intelligent Equipment Co., Ltd
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Hunan Sinoboom Heavy Industry Co Ltd
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Priority to CN201310338150.9A priority Critical patent/CN103438037B/en
Publication of CN103438037A publication Critical patent/CN103438037A/en
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Publication of CN103438037B publication Critical patent/CN103438037B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention discloses the lifting of a kind of scissors type altitude job platform and down maneuver hydraulic system, the outlet of the first one-way valve (2) is with manual function 2/2-way solenoid directional control valve (3) to be connected with the rodless cavity and first of lower elevating ram (9), first band manual function 2/2-way solenoid directional control valve (3) is connected with one end of first throttle valve (1), the rod chamber of lower elevating ram (9) is connected with fuel tank (10) with the other end of first throttle valve (1), the outlet of the second one-way valve (6) is connected with the import of the rodless cavity of upper elevating ram (8) and 2/2-way solenoid directional control valve (11), the outlet of 2/2-way solenoid directional control valve (11) is connected with one end of second throttle (5), the rod chamber of upper elevating ram (8) is connected with fuel tank (10) with the other end of second throttle (5), relief valve (7) is connected with between the rodless cavity of upper elevating ram (8) and fuel tank (10).Elevating ram rod chamber of the present invention is full of hydraulic oil all the time, and protection oil cylinder inner seal, extends the working life of oil cylinder, and emergent step-down operation is simple.

Description

A kind of scissors type altitude job platform lifting and down maneuver hydraulic system
Technical field
The present invention relates to a kind of high-altitude operation vehicle, particularly relate to a kind of scissors type aerial lift device (two elevating ram aerial work platform) working platform and rise and decline hydraulic system.
Background technique
The usual elevating ram rodless cavity of two elevating ram scissor aerial work platform and rod chamber oil circuit all separate, time platform declines, elevating ram rodless cavity hydraulic oil is by oil-feed hydralic hose oil sump tank, rod chamber produces negative pressure by suction capacity from oil suction in hydraulic oil container, because scissors type high-altitude operation vehicle is vertical rising and decline operating mode, lift height is higher larger from suction drag, suction capacity is poorer, cause elevating ram rod chamber to produce and inhale sky, injury is produced to Sealing, suck in air containing water simultaneously, oil cylinder rodless cavity wall and piston rod corrosion can be made.When using emergent decline, complex operation, needs to pull two spools simultaneously.
Summary of the invention
Technical problem to be solved by this invention is to provide one makes elevating ram rod chamber be full of hydraulic oil all the time; protection oil cylinder inner seal; extend the working life of oil cylinder, emergent step-down operation simple scissors type altitude job platform lifting and down maneuver hydraulic system.
In order to solve the problems of the technologies described above, scissors type altitude job platform provided by the invention lifting and down maneuver hydraulic system, comprise the first one-way valve, second one-way valve, first throttle valve, second throttle, first band manual function 2/2-way solenoid directional control valve, lower elevating ram, upper elevating ram and fuel tank, the import Bonding pressure oil of the first described one-way valve and the second described one-way valve, the outlet of the first described one-way valve is with the import of manual function 2/2-way solenoid directional control valve to be connected with the rodless cavity and described first of described lower elevating ram, the outlet of the first described band manual function 2/2-way solenoid directional control valve is connected with one end of described first throttle valve, the rod chamber of described lower elevating ram is connected with the other end of described first throttle valve, the other end of described first throttle valve is connected with described fuel tank, the outlet of the second described one-way valve is connected with the import of the rodless cavity of described upper elevating ram and the second 2/2-way solenoid directional control valve, the outlet of the second described 2/2-way solenoid directional control valve is connected with one end of described second throttle, the rod chamber of described upper elevating ram is connected with the other end of described second throttle, the other end of described second throttle is connected with described fuel tank, relief valve is connected with between the rodless cavity of described upper elevating ram and described fuel tank.
First throttle valve, the first one-way valve and the first band manual function 2/2-way solenoid directional control valve are integrated in the first valve block, and the second one-way valve, second throttle, the second 2/2-way solenoid directional control valve and relief valve are integrated in the second valve block.
The outlet of the first described one-way valve is also connected with overweight sensor.
Adopt the lifting of scissors type altitude job platform and the down maneuver hydraulic system of technique scheme, platform is elevating ram rodless cavity oil suction difficulty when down maneuver.Platform is when down maneuver, cylinder rod chamber is communicated with rodless cavity with 2/2-way solenoid directional control valve by the first band manual function 2/2-way solenoid directional control valve, the negative pressure that the resistance that rodless cavity hydraulic oil is out produced by pipeline and rod chamber produce directly is pressed into elevating ram rod chamber, shorten the oil suction distance of elevating ram greatly, elevating ram rod chamber is made to be filled with hydraulic oil all the time, during stock idle, can not to oil cylinder internal corrosion.This hydraulic solution another realizes manual-operated emergent decline function, by pulling an emergent bracing wire of being with manual function 2/2-way solenoid directional control valve to be connected with first, platform is declined.
Compared with prior art; the invention has the advantages that: the oil suction distance shortening elevating ram; elevating ram rod chamber is made to be filled with hydraulic oil all the time; protect oil cylinder inner seal; thus extend the working life of oil cylinder, the another emergent decline using single cord to achieve two elevating ram scissors type altitude job platform.
Accompanying drawing explanation
Fig. 1 is existing hydraulic system principle figure.
Fig. 2 is the structural representation of invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
See Fig. 1, existing hydraulic system comprises first throttle valve 1, second throttle 5, first one-way valve 2, second one-way valve 6, first band manual function 2/2-way solenoid directional control valve 3, second band manual function 2/2-way solenoid directional control valve 4, upper elevating ram 8, lower elevating ram 9 and fuel tank 10, when cutting forklift lifting action, pressure oil enters upper and lower elevating ram respectively by the first band manual function 2/2-way solenoid directional control valve 3 and the second band manual function 2/2-way solenoid directional control valve 4 again respectively by the first one-way valve 2 and the second one-way valve 6, the rod chamber hydraulic oil oil sump tank 10 of upper elevating ram 8 and lower elevating ram 9.When scissor car down maneuver, first band manual function 2/2-way solenoid directional control valve 3 and the second band manual function 2/2-way solenoid directional control valve 4 simultaneously electric, platform declines by Action of Gravity Field, the rodless cavity hydraulic oil of upper elevating ram 8 and lower elevating ram 9 is respectively by the first band manual function 2/2-way solenoid directional control valve 3, second band manual function 2/2-way solenoid directional control valve 4, first throttle valve 1 and second throttle 5 oil sump tank 10, first throttle valve 1 and second throttle 5 control rate of descent, rod chamber produces negative pressure simultaneously, at a distance from fuel tank 10 oil suction or suction filtered air, when using emergent decline function, need to pull the first band manual function 2/2-way solenoid directional control valve 3 and the second band manual function 2/2-way solenoid directional control valve 4 simultaneously, platform is declined, complex operation.
See Fig. 2, first throttle valve 1, first one-way valve 2 and the first band manual function 2/2-way solenoid directional control valve 3 are integrated in the first valve block 13, second one-way valve 6, second throttle 5, second 2/2-way solenoid directional control valve 4 and relief valve 7 are integrated in the second valve block 14, the import Bonding pressure oil of the first one-way valve 2 and the second one-way valve 6, the outlet of the first one-way valve 2 is with the import of manual function 2/2-way solenoid directional control valve 3 to be connected with the rodless cavity and first of lower elevating ram 9, the outlet of the first one-way valve 2 is also connected with overweight sensor 12, the outlet of the first band manual function 2/2-way solenoid directional control valve 3 is connected with one end of first throttle valve 1, the rod chamber of lower elevating ram 9 is connected with the other end of first throttle valve 1, the other end of first throttle valve 1 is connected with fuel tank 10, the outlet of the second one-way valve 6 is connected with the import of the rodless cavity of upper elevating ram 8 and the second 2/2-way solenoid directional control valve 4, the outlet of the second 2/2-way solenoid directional control valve 4 is connected with one end of second throttle 5, the rod chamber of upper elevating ram 8 is connected with the other end of second throttle 5, the other end of second throttle 5 is connected with fuel tank 10, relief valve 7 is connected with between the rodless cavity of upper elevating ram 8 and fuel tank 10.
See Fig. 2, pressure oil enters the rodless cavity of lower elevating ram 9 by the CSE mouth of the first valve block 13 and the first one-way valve 2, first band manual function 2/2-way solenoid directional control valve 3 is in normal position, the rod chamber hydraulic oil of lower elevating ram 9 passes through the B mouth oil sump tank 10 of the first valve block 13, simultaneously pressure oil enters the rodless cavity of upper elevating ram 8 by the CSE mouth of the second valve block 14 and the second one-way valve 6, second 2/2-way solenoid directional control valve 4 is in normal position, the rod chamber hydraulic oil of upper elevating ram 8 passes through the B mouth oil sump tank 10 of the second valve block 14, upper elevating ram 8 and lower elevating ram 9 have stretched out platform raising action simultaneously.Platform declines and relies on Action of Gravity Field, first band manual function 2/2-way solenoid directional control valve 3 and the second 2/2-way solenoid directional control valve 4 simultaneously electric, the rodless cavity hydraulic oil of lower elevating ram 9 enters return tube by the first band manual function 2/2-way solenoid directional control valve 3 and first throttle valve 1, this at present elevating ram 9 rod chamber produce negative pressure, return tube hydraulic oil is pressed into the rod chamber of lower elevating ram 9, the rodless cavity hydraulic oil of upper elevating ram 8 enters return tube by the second 2/2-way solenoid directional control valve 4 and second throttle 5, the rod chamber of upper elevating ram 8 produces negative pressure, return tube hydraulic oil is pressed into the rod chamber of elevating ram 8, upper elevating ram 8 and lower elevating ram 9 are retracted simultaneously, complete platform down maneuver.The present invention can use 10m and 12m scissor aerial work platform, and this scheme ensures that the rodless cavity of elevating ram and rod chamber are full of hydraulic oil all the time, is conducive to protecting cylinder seal, extends oil cylinder working life.This system another, also with manual-operated emergent decline function, when single car load electricity exhausts or when electrical control was lost efficacy, can manually make platform decline.First is with manual function 2/2-way solenoid directional control valve 3 to have manually pulls spool function, and its spool end is threaded, and connects an emergent bracing wire.When manually pulling emergent bracing wire, the rodless cavity hydraulic oil of lower elevating ram 9 enters return tube by the first band manual function 2/2-way solenoid directional control valve 3 and first throttle valve 1, the rodless cavity hydraulic oil of upper elevating ram 8 then enters return tube by relief valve 7, easy and simple to handle.

Claims (3)

1. scissors type altitude job platform lifting and down maneuver hydraulic system, comprise the first one-way valve (2), second one-way valve (6), first throttle valve (1), second throttle (5), first band manual function 2/2-way solenoid directional control valve (3), lower elevating ram (9), upper elevating ram (8) and fuel tank (10), it is characterized in that: the import Bonding pressure oil of described the first one-way valve (2) and described the second one-way valve (6), the outlet of described the first one-way valve (2) is with the import of manual function 2/2-way solenoid directional control valve (3) to be connected with the rodless cavity and described first of described lower elevating ram (9), the outlet of the first described band manual function 2/2-way solenoid directional control valve (3) is connected with one end of described first throttle valve (1), the rod chamber of described lower elevating ram (9) is connected with the other end of described first throttle valve (1), the other end of described first throttle valve (1) is connected with described fuel tank (10), the outlet of described the second one-way valve (6) is connected with the import of the rodless cavity of described upper elevating ram (8) and the second 2/2-way solenoid directional control valve (4), the outlet of the second described 2/2-way solenoid directional control valve (4) is connected with one end of described second throttle (5), the rod chamber of described upper elevating ram (8) is connected with the other end of described second throttle (5), the other end of described second throttle (5) is connected with described fuel tank (10), relief valve (7) is connected with between the rodless cavity of described upper elevating ram (8) and described fuel tank (10).
2. scissors type altitude job platform according to claim 1 lifting and down maneuver hydraulic system, it is characterized in that: first throttle valve (1), the first one-way valve (2) and the first band manual function 2/2-way solenoid directional control valve (3) are integrated in the first valve block (13), and the second one-way valve (6), second throttle (5), the second 2/2-way solenoid directional control valve (4) and relief valve (7) are integrated in the second valve block (14).
3. scissors type altitude job platform according to claim 1 and 2 lifting and down maneuver hydraulic system, is characterized in that: the outlet of described the first one-way valve (2) is also connected with overweight sensor (12).
CN201310338150.9A 2013-08-06 2013-08-06 A kind of scissors type altitude job platform lifting and down maneuver hydraulic system Expired - Fee Related CN103438037B (en)

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Publication number Priority date Publication date Assignee Title
CN105114379B (en) * 2015-09-30 2017-05-10 湖南星邦重工有限公司 Lifting platform and hydraulic system thereof
CN106006501B (en) * 2016-08-08 2019-04-02 湖南星邦重工有限公司 Hoistable platform and its hydraulic lifting system
CN106762880A (en) * 2016-12-28 2017-05-31 中国航空工业集团公司西安飞机设计研究所 A kind of airplane tail pillar hydraulic pressure folding and unfolding control system
CN107269603B (en) * 2017-07-02 2018-11-02 盐城雄鹰精密机械有限公司 Lifting hydraulic system is forbidden in the walking of lift truck
CN107313998B (en) * 2017-07-17 2019-06-18 湖南三一港口设备有限公司 A kind of hydraulic energy-saving system and front handling mobile crane

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CN203096585U (en) * 2013-01-31 2013-07-31 徐州徐工筑路机械有限公司 Hydraulic system of bituminous pavement maintenance truck

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CN202881826U (en) * 2012-09-07 2013-04-17 徐州万邦道路工程装备服务股份公司 Hydraulic control device for screed of paver
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Address after: 410600 No.128, Jinzhou Avenue East, Ningxiang high tech Development Zone, Changsha City, Hunan Province

Patentee after: Hunan Xingbang Intelligent Equipment Co., Ltd

Address before: 410600, Hunan state industrial park, 128 East Jinzhou Avenue, Jinzhou new district, Hunan, Changsha

Patentee before: Hunan Sinoboom Heavy Industry Co., Ltd.

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Granted publication date: 20160323

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CF01 Termination of patent right due to non-payment of annual fee