CN1079277A - Electric liquid proportional logic multiway valve - Google Patents
Electric liquid proportional logic multiway valve Download PDFInfo
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- CN1079277A CN1079277A CN 92108152 CN92108152A CN1079277A CN 1079277 A CN1079277 A CN 1079277A CN 92108152 CN92108152 CN 92108152 CN 92108152 A CN92108152 A CN 92108152A CN 1079277 A CN1079277 A CN 1079277A
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Abstract
Electric liquid proportional logic multiway valve belongs to engineering machinery hydraulic drive technology field.The technical problem that solves is that the Logical Multiplex valve with electro-hydraulic proportion reversing valve and particular design is combined into electric liquid proportional logic multiway valve.The major technique feature is only with an electric-hydraulic proportion element (electrohydraulic proportional variable pump or electro-hydraulic proportion reversing valve), leads through the Logical Multiplex valve, can distinguish all executive components (oil hydraulic motor and oil hydraulic cylinder) in the control hydraulic system; Carry out composite move or hold concurrently when wanting open type and closed circuit as need, can adopt two groups of electric liquid proportional logic multiway valves.Be applicable to polytype engineering machinery, as hydraulic hoist, loader etc.
Description
The invention belongs to engineering machinery hydraulic drive technology field.
Domestic large and medium-sized engineering machinery hydraulic transmission at present rests on the level of hydraulic proportional control always, domesticly promptly entered electric-hydraulic proportion control from the later stage eighties, in fact also just the electro-hydraulic proportional multi-way valve is replaced the hydraulic proportional multi-way valve, but multi-way valve is still corresponding one by one with executive component, the result still is that structure is huge, the cable tubing complexity, the cost costliness.
Purpose of the present invention: only adopt an electro-hydraulic proportion reversing valve to handle a plurality of executive components, expensive electro-hydraulic proportion reversing valve of economization and connecting pipeline.
The present invention is a kind of electric liquid proportional logic multiway valve, is exclusively used in engineering machinery and forms electric-hydraulic proportion logic control system (automobile mode crane hydraulic system) by hoist oil hydraulic motor and (10) rotary motor of (1) transfer case, (2) constant output pump, (3) electro-hydraulic proportion reversing valve, (4) pressure compensator, (5) Logical Multiplex valve, (6) crane telescopic cylinder, (7) luffing oil hydraulic cylinder, (8) permanent power electrohydraulic proportional variable pump, (9).Particular design Logical Multiplex valve (5) during it is formed conspires to create integral body by some logic break-make valve blocks with screw rod and constitutes the Logical Multiplex valve, and electro-hydraulic proportion reversing valve and Logical Multiplex valve are combined into electric liquid proportional logic multiway valve.Its working principle: with an electric-hydraulic proportion control unit (electrohydraulic proportional variable pump or electro-hydraulic proportion reversing valve), lead through the Logical Multiplex valve, can be with an one control lever all executive components (oil hydraulic motor and oil hydraulic cylinder) in the control hydraulic system respectively, and make it all have the double grading of electric-hydraulic proportion control and logic control; Carry out composite move or hold concurrently when wanting open type and closed circuit at needs, then adopt two groups of electric liquid proportional logic multiway valves to realize.The Logical Multiplex valve constitutes Logical Multiplex valve valve block by 2 hydraulic control cone valves (11), 4 one-way valves (12), 2 relief valves (13) and 1 electromagnetism two-position valve (14), and the several requirements according to action of the valve block of Logical Multiplex valve can be set up arbitrarily.
Electric liquid proportional logic multiway valve is the control maincenter of construction machinery hydraulic system.The present invention is according to principles such as control technique such as electromechanical integration control in modern age, servo (ratio) control and logic controls.The Logical Multiplex valve that electro-hydraulic proportion reversing valve and the inventor are designed voluntarily is combined into electric liquid proportional logic multiway valve.Its characteristics are only to need to adopt an electric-hydraulic proportion control unit, through Logical Multiplex valve guiding, can distinguish all executive components in the control hydraulic system, and make each executive component all have the dual superiority of electric-hydraulic proportion control and logic control.The present invention can be widely used in polytype engineering machinery, for example hydraulic hoist, hydraulic shovel, hydraulic loader or the like, and then superiority will be more outstanding in particular for large and medium-sized machinery.
Conceptual design and working principle: accompanying drawing 1 is used for the schematic representation of hydraulic hoist for electric liquid proportional logic multiway valve.Complete machine adopts double pump double loop hydraulic system.Transfer case (1) left side is an open circuit, by constant output pump (2) to electro-hydraulic proportion reversing valve (3) fuel feeding, because it is minimum that constant output characteristic and electric-hydraulic proportion control action are reduced to the spill losses in this loop, selector valve has pressure compensator (4), it makes pressure reduction before and after the selector valve restriction remain constant about 6bar, not only make restriction loss be kept to minimum, and can not be subjected to induced pressure to change interference by regime flow.Selector valve is controlled crane telescopic cylinder (6) and derricking cylinder (7) respectively through Logical Multiplex valve (5).
The Logical Multiplex valve is to conspire to create integral body by some logic break-make valve blocks with bolt to constitute multi-way valve.Logic break-make valve block (5) is shown in Fig. 2 (detailed drawing), be that two hydraulic control cone valves of employing (11) lock respectively, oil circuit, the cone valve sensitivity, sealing is reliable, by four one-way valves (12) will be cut in four oil circuits pressure relatively the highest pressure oil cause cone valve and behind valve pushed against.During beginning, all logic break-make valve blocks all are in these states, and all oil circuit is obstructed, and executive component is neither moving.When a certain executive component of need is worked, as long as press corresponding push button, the electromagnetism two-position valve (14) in the corresponding valve block is connect electricity, make cone valve release behind, so pressure oil is opened cone valve and linked up oil circuit from the front, electro-hydraulic proportion reversing valve can be handled corresponding executive component.Each valve block all is with two relief valves (13), makes pressure regulation or overload protection and uses.For example derricking cylinder rises the arm side and is adjusted to 250bar, only needs about 10bar and fall the arm side, reduces the pressure loss as far as possible.When turning round by the electricity of another valve block, last valve block is jumped button outage locking automatically.Press main switch at last, then all valve block outages, whole electric liquid proportional logic multiway valve restores awaits orders.
Transfer case shown in the accompanying drawing 1 (1) right side is a closed circuit, and it forms pump control volume speed-modulating loop by a permanent power electrohydraulic proportional variable pump (8) and Logical Multiplex valve, also is to control several executive components with electric-hydraulic proportion element one one control lever.The working principle of its electric liquid proportional logic multiway valve is with preceding identical.
Executive component when separation transfer case both sides when for example the luffing oil hydraulic cylinder needs composite move with the oil hydraulic motor (9) that hoists, can be handled the operating handle of both sides simultaneously and realize.When carrying out composite move as the lifting motor (9) of need homonymy and rotary motor (10), can in the multi-way valve of left side, set up a valve block in advance, oil is caused the right side oil circuit that hoists, and this just is transferred to the left side to the operating handle that hoists, so that carry out composite move with the rotary motor on right side.Such transfer also can reach the purpose that quicken at the interflow.In a word, the several requirements according to action of the valve block of left and right sides Logical Multiplex valve can be set up arbitrarily, and operating handle has only one of a side all the time.Certainly, the machinery that need not composite move only uses an one-sided one control lever also just much of that.This is of the present invention one big characteristics.
Major advantage of the present invention and effect:
1. the present invention has used a series of modern control technology such as electromechanical integration, proportional control and logic control, and advanced design is novel.
2. adopt an electro-hydraulic proportion reversing valve to handle a plurality of executive components, greatly economization expensive electro-hydraulic proportion reversing valve and connecting pipeline, remarkable in economical benefits.
3. simple relatively, the reliable performance of electric liquid proportional logic multiway valve structure, use are flexible, easy to maintenance.
4. logical valve adopts cone valve break-make oil circuit, good airproof performance, and reliable lock is avoided interior leakage, and cone valve is active in one's movements simultaneously, is particularly conducive to big flow heavy caliber passage.
5. the electric liquid proportional logic multiway valve applicability is strong, can be in order to satisfy the needs of polytype engineering machinery, for example: single pump single loop or double pump double loop; Valve control system or pump control system; Open circuit or closed circuit; Shunting or interflow; Single action or composite move; Throttle grverning or volumetric speed control etc.In addition, can also realize the conversion of operating handle.
6. electric liquid proportional logic multiway valve is owing to adopt the pump of minimum number, thereby the total load power that hangs over the pump on the transfer case is for minimum, the sky stream loss of pump and the linear loss minimum of pipeline; Owing to adopt the control of permanent power and variable pump and electric-hydraulic proportion, make the spill losses of system reduce to minimum; Because electro-hydraulic proportion reversing valve has pressure compensator, so the restriction loss of system is minimum; Because adopting cone valve is on-off valve, its good airproof performance, the earial drainage loss is little; Owing to be equipped with pressure adjustment relief valve on every oil circuit of Logical Multiplex valve, regulate by actual demand separately, to reduce unnecessary throttling and spill losses.Therefore, the energy-saving effect highly significant of the hydraulic system of forming by electric liquid proportional logic multiway valve.
Description of drawings:
Fig. 1. truck with crane electric liquid proportional logic multiway valve hydraulic control system schematic diagram.
Fig. 2. Logical Multiplex valve valve block schematic diagram (parts 5 detailed drawings)
Part number in addition: 1. transfer case, 2. constant output pump, 3. electro-hydraulic proportion reversing valve, 4. pressure compensator, 5. Logical Multiplex valve, 6. crane telescopic cylinder, 7. luffing oil hydraulic cylinder, 8. permanent power electrohydraulic proportional variable pump, 9. hoist oil hydraulic motor, 10. rotary motor, 11. hydraulic control cone valves, 12. one-way valves, 13. relief valves, 14. electromagnetism two-position valves.
Claims (2)
1, a kind of electric liquid proportional logic multiway valve, be exclusively used in engineering machinery by (1) transfer case, (2) constant output pump, (3) electro-hydraulic proportion reversing valve, (4) pressure compensator, (5) Logical Multiplex valve, (6) crane telescopic cylinder, (7) luffing oil hydraulic cylinder, (8) permanent power electrohydraulic proportional variable pump, (9) hoist oil hydraulic motor and (10) rotary motor formed automobile formula crane hydraulic system, it is characterized in that particular design Logical Multiplex valve (5), conspire to create integral body by some logic break-make valve blocks with bolt and constitute the Logical Multiplex valve, and electro-hydraulic proportion reversing valve and Logical Multiplex valve be combined into electric liquid proportional logic multiway valve, with an electric-hydraulic proportion control unit (electrohydraulic proportional variable pump or electro-hydraulic proportion reversing valve), footpath Logical Multiplex valve guiding, can be with an one control lever all executive components (oil hydraulic motor and oil hydraulic cylinder) in the control hydraulic system respectively, and make it all have the double grading of electric-hydraulic proportion control and logic control; Carry out composite move or hold concurrently when wanting open type and closed circuit at needs, then adopt two groups of electric liquid proportional logic multiway valves to realize.
2, electric liquid proportional logic multiway valve as claimed in claim 1, it is characterized in that the Logical Multiplex valve constitutes Logical Multiplex valve valve block by 2 hydraulic control cone valves (11), 4 one-way valves (12), 2 relief valves (13) and 1 electromagnetism two-position valve (14), the several requirements according to action of the valve block of Logical Multiplex valve can be set up arbitrarily.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92108152 CN1079277A (en) | 1992-05-23 | 1992-05-23 | Electric liquid proportional logic multiway valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92108152 CN1079277A (en) | 1992-05-23 | 1992-05-23 | Electric liquid proportional logic multiway valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1079277A true CN1079277A (en) | 1993-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92108152 Pending CN1079277A (en) | 1992-05-23 | 1992-05-23 | Electric liquid proportional logic multiway valve |
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| Country | Link |
|---|---|
| CN (1) | CN1079277A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044634C (en) * | 1996-11-13 | 1999-08-11 | 中国人民解放军第二炮兵工程学院 | Hydraulic system for large erecting equipment |
| CN101493104B (en) * | 2009-02-23 | 2011-06-15 | 三一重机有限公司 | Rotary logical valve for protecting rotary motor |
| CN109630504A (en) * | 2018-12-26 | 2019-04-16 | 太原理工大学 | A kind of pressure compensated oil inlet and outlet autonomous control system of band |
| CN112664492A (en) * | 2019-10-16 | 2021-04-16 | 沈阳新松机器人自动化股份有限公司 | Double-valve-group parallel control hydraulic system |
-
1992
- 1992-05-23 CN CN 92108152 patent/CN1079277A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044634C (en) * | 1996-11-13 | 1999-08-11 | 中国人民解放军第二炮兵工程学院 | Hydraulic system for large erecting equipment |
| CN101493104B (en) * | 2009-02-23 | 2011-06-15 | 三一重机有限公司 | Rotary logical valve for protecting rotary motor |
| CN109630504A (en) * | 2018-12-26 | 2019-04-16 | 太原理工大学 | A kind of pressure compensated oil inlet and outlet autonomous control system of band |
| CN109630504B (en) * | 2018-12-26 | 2021-01-26 | 太原理工大学 | Oil inlet and outlet independent control system with pressure compensation function |
| CN112664492A (en) * | 2019-10-16 | 2021-04-16 | 沈阳新松机器人自动化股份有限公司 | Double-valve-group parallel control hydraulic system |
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| C06 | Publication | ||
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |