CN101251134A - Leak-proof design for maintenance of electrohydraulic servo valve - Google Patents

Leak-proof design for maintenance of electrohydraulic servo valve Download PDF

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Publication number
CN101251134A
CN101251134A CNA2008100494684A CN200810049468A CN101251134A CN 101251134 A CN101251134 A CN 101251134A CN A2008100494684 A CNA2008100494684 A CN A2008100494684A CN 200810049468 A CN200810049468 A CN 200810049468A CN 101251134 A CN101251134 A CN 101251134A
Authority
CN
China
Prior art keywords
valve
servo valve
electro
maintenance
oil
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.)
Pending
Application number
CNA2008100494684A
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Chinese (zh)
Inventor
李兰生
刘艳萍
曾庆明
安宁
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.)
China Nonferrous Metals Processing Technology Co Ltd
Original Assignee
China Nonferrous Metals Processing Technology 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 China Nonferrous Metals Processing Technology Co Ltd filed Critical China Nonferrous Metals Processing Technology Co Ltd
Priority to CNA2008100494684A priority Critical patent/CN101251134A/en
Publication of CN101251134A publication Critical patent/CN101251134A/en
Pending legal-status Critical Current

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Abstract

A leak prevention design is used in the overhaul of an electro-hydraulic servo valve, wherein all the oil inlet ways and the oil outlet ways of an electro-hydraulic servo valve (1) are communicated with check valves (2) of the same number as the oil inlet ways and the oil outlet ways; when a user needs to take down or close a broken-down electro-hydraulic servo valve (1), all valve positions of the check valves (2) are closed at first to cut off all oil ways of the electro-hydraulic servo valve (1), thereby preventing the overflow of the oil in a pipe or the abnormal operation of other servo valves; when the maintenance and reinstallation of the electro-hydraulic servo valve (1) are completed, all valve positions of the check valves (2) are opened to restore the normal use of the electro-hydraulic servo valve (1). The leak prevention design has the advantages that: the check valves which is of the same number as the oil inlet ways and the oil outlet ways can be plate type ball valves or plug-in check valves; the connecting size of the electro-hydraulic servo valve (1) is identical to those of the solepieces of the plate type ball valves and the check valves (2); therefore, the tight connecting mode, which ensures a more compact overall structure and convenient installation and maintenance, completely solves the problems of oil overflow, etc. and is environment friendly and economical.

Description

A kind of leak free design when being used for maintenance of electrohydraulic servo valve
Technical field
The invention belongs to electro-hydraulic servo hydraulics field, especially a kind of leak free design when being used for maintenance of electrohydraulic servo valve.
Background technique
In the electro-hydraulic servo hydraulic system of using at present, generally all be that electrohydraulic control is directly installed on the manifold block, oil circuit does not have leak free design during maintenance of electrohydraulic servo valve.Along with the enhancing of environment and occupational health consciousness and to the emergent preparation of equipment operation, people have proposed more and more high requirement to application of hydraulic system.Electrohydraulic control is as a kind of high-accuracy hydraulic element, and its turbidity test to hydraulic oil require quite high.In use,, often make servovalve frequent stuck or malfunctioning, like this, have to change servovalve owing to the turbidity test reason of fluid.When tearing valve open, a considerable amount of fluid will overflow from the hydraulic fluid port of junction surface in the system at every turn, befouling environment and wasting energy not only, and also can bring more serious consequence in some particular application.As depressing in the Hydrauservo System at Aluminium Cold Rolling machine and aluminium foil mill, because servovalve is installed on the manifold block of mill housing two side lower parts, when tearing valve open at every turn, the hydraulic oil that overflows will be sneaked in technological lubrication medium such as the rolling kerosene, the technological lubrication medium is polluted, thereby have a strong impact on the surface quality of aluminium strip paper tinsel processing.In the electro-hydraulic servo hydraulic system of a plurality of servovalve parallel operations,, will cause other servovalve can not proper functioning if wherein certain servovalve breaks down; And in the system of leak free design is arranged, by the whole stop valves on the oil circuit of closing fault servovalve immediately, but other servovalve proper functioning still.
Summary of the invention
For addressing the above problem, the invention provides a kind of leak free design when being used for maintenance of electrohydraulic servo valve, the excessive problem of fluid when using this leak free design can solve maintenance of electrohydraulic servo valve or replacing, in the electro-hydraulic servo hydraulic system of a plurality of servovalve parallel operations, by the whole stop valves on the oil circuit of closing fault servovalve immediately, but other servovalve is proper functioning still, excessive fluid is entered in the technological lubrication medium, thereby improve band paper tinsel machined surface quality, be specially adapted to iron and steel, non-ferrous metal processing industry.
For achieving the above object, the present invention adopts following technological scheme:
Described leak free design when being used for maintenance of electrohydraulic servo valve is that all of electrohydraulic control all are communicated with the stop valve that equates into and out of oil circuit quantity into and out of oil circuit; When needs are pulled down or during the closing fault electrohydraulic control, earlier all valve position of stop valve closed, thereby cut off whole oil circuits of electrohydraulic control, avoid the excessive or fault servovalve of fluid in the pipeline to cause other servovalve cisco unity malfunction; Finish when electrohydraulic control keeps in repair back dress, all valve position of stop valve are opened again, electrohydraulic control can normally use.
Described leak free design when being used for maintenance of electrohydraulic servo valve, it can be board-like ball valve with the connection stop valve that equates into and out of oil circuit quantity, also can be the plug-in type stop valve.
Described leak free design when being used for maintenance of electrohydraulic servo valve, its stop valve sole piece is identical with the Conncetion cimension of electrohydraulic control.
Owing to adopt as above technological scheme, the present invention has following superiority:
1, its electrohydraulic control of leak free design of the present invention is identical with the Conncetion cimension of stop valve sole piece, and this tight Placement makes its overall structure compact more, and installation and maintenance is got up very convenient, has thoroughly stopped the excessive problem of fluid, environmental protection and saving.
2, in the electro-hydraulic servo hydraulic system of a plurality of servovalve parallel operations, by the whole stop valves on the oil circuit of closing fault servovalve immediately, but other servovalve proper functioning still, system can realize emergent the use.
Description of drawings
Fig. 1 is a leak free design principle schematic of the present invention.
Among the figure: the 1-electrohydraulic control; The 2-stop valve.
Embodiment
In Fig. 1: the leak free design when being used for maintenance of electrohydraulic servo valve of the present invention is that all of electrohydraulic control (1) all are communicated with the stop valve that equates into and out of oil circuit quantity (2) into and out of oil circuit; When needs are pulled down or during closing fault electrohydraulic control (1), earlier all valve position of stop valve (2) closed, thereby cut off whole oil circuits of electrohydraulic control (1), avoid fluid in the pipeline excessive or cause other servovalve cisco unity malfunction; Finish when electrohydraulic control (1) keeps in repair back dress, all valve position of stop valve (2) are opened again, electrohydraulic control (1) can normally use.With the stop valve that equates into and out of oil circuit quantity can be board-like ball valve, also can be the plug-in type stop valve.
Electrohydraulic control (1) is consistent with the Conncetion cimension of board-like ball valve, stop valve (2) sole piece, and this close-coupled mode makes its overall structure compact more, and installation and maintenance is got up very convenient, has thoroughly stopped the excessive problem of fluid etc., environmental protection and saving.

Claims (3)

1. leak free design when being used for maintenance of electrohydraulic servo valve is characterized in that: all of electrohydraulic control (1) all are communicated with the stop valve that equates into and out of oil circuit quantity (2) into and out of oil circuit; When needs are pulled down or during closing fault electrohydraulic control (1), earlier all valve position of stop valve (2) closed, thereby cut off whole oil circuits of electrohydraulic control (1), avoid fluid in the pipeline excessive or cause other servovalve cisco unity malfunction in the system; Finish when electrohydraulic control (1) keeps in repair back dress, all valve position of stop valve (2) are opened again, electrohydraulic control (1) can normally use.
2. the leak free design when being used for maintenance of electrohydraulic servo valve as claimed in claim 1, it is characterized in that: it can be board-like ball valve with electrohydraulic control into and out of the connection stop valve (2) that oil circuit quantity equates, also can be the plug-in type stop valve.
3. the leak free design when being used for maintenance of electrohydraulic servo valve as claimed in claim 1, it is characterized in that: its stop valve (2) sole piece is identical with the Conncetion cimension of electrohydraulic control.
CNA2008100494684A 2008-03-26 2008-03-26 Leak-proof design for maintenance of electrohydraulic servo valve Pending CN101251134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2008100494684A CN101251134A (en) 2008-03-26 2008-03-26 Leak-proof design for maintenance of electrohydraulic servo valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2008100494684A CN101251134A (en) 2008-03-26 2008-03-26 Leak-proof design for maintenance of electrohydraulic servo valve

Publications (1)

Publication Number Publication Date
CN101251134A true CN101251134A (en) 2008-08-27

Family

ID=39954683

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2008100494684A Pending CN101251134A (en) 2008-03-26 2008-03-26 Leak-proof design for maintenance of electrohydraulic servo valve

Country Status (1)

Country Link
CN (1) CN101251134A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102720232A (en) * 2012-06-15 2012-10-10 江苏柳工机械有限公司 Damping device of swing arms of slipping steering loaders
CN110566530A (en) * 2019-09-06 2019-12-13 烟台中宇航空液压有限公司 Oil leakage prevention device for electro-hydraulic servo valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102720232A (en) * 2012-06-15 2012-10-10 江苏柳工机械有限公司 Damping device of swing arms of slipping steering loaders
CN102720232B (en) * 2012-06-15 2014-10-29 江苏柳工机械有限公司 Damping device of swing arms of slipping steering loaders
CN110566530A (en) * 2019-09-06 2019-12-13 烟台中宇航空液压有限公司 Oil leakage prevention device for electro-hydraulic servo valve

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Open date: 20080827