CN104033438A - Multi-functional hydraulic-jamming preventing pilot valve for electro-hydraulic directional valve - Google Patents
Multi-functional hydraulic-jamming preventing pilot valve for electro-hydraulic directional valve Download PDFInfo
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- CN104033438A CN104033438A CN201410251458.4A CN201410251458A CN104033438A CN 104033438 A CN104033438 A CN 104033438A CN 201410251458 A CN201410251458 A CN 201410251458A CN 104033438 A CN104033438 A CN 104033438A
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Abstract
The invention discloses a multi-functional hydraulic-jamming preventing pilot valve for an electro-hydraulic directional valve, which is characterized in that the pilot valve is formed by connecting a first two-position three-way cartridge valve (1) and a second two-position three-way cartridge valve (2) with a control oil-way valve block (3); each of the first two-position three-way cartridge valve (1) and the second two-position three-way cartridge valve (2) is provided with oil ports (C, D and E) and a valve element (F); the control oil-way valve block (3) is provided with control oil ways (H, I, J and K) and oil ways (P, T, A and B);a first process hole plug (6) is arranged on an end part of the control oil way (K); a second process hole plug (5) is arranged at an end part of each of the control oil ways (H, J and I). The multi-functional hydraulic-jamming preventing pilot valve has the advantages of simple structure, high simplicity in mounting, high flexibility in operation, no need of changing the original valve and the like, the failure diagnosis difficulty is reduced to certain extent, and the cost of manpower and material resources for the maintenance is reduced.
Description
Technical field:
The present invention relates to technical field of metallurgical machinery, is a kind of multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve specifically, is widely used in the secondary electro-hydraulic reversing valve in hydraulic system in metallurgical machinery.
Background technique:
At present, in some metallurgical machineries, hydraulic system is complicated, main line hydraulic system 8 covers as total in PQF Hot Line, 70 of valve platforms, electric liquid reversing control valve group is more than 400 groups nearly, and electro-hydraulic reversing valve all adopts the 4WEH type selector valve of German BOSCH-REXROTH company, for control liquid stream unlatching, stop and direction, such valve working stability is reliable, action is accurate, automaticity is high, long service life, has effectively met device action demand, has become the hydraulic control component being most widely used.But two defects (described model is BOSCH-REXROTH standard) below main existence in production application:
1, the general employing of the pilot valve of 4WEH type secondary electro-hydraulic reversing valve is 4WE6 type electromagnetism direct-acting type direction sliding valve, the switching that realizes valve core of main valve is switched in action by guide's spool, thereby realize the commutation action of oil cylinder, pilot valve core material is generally all the suitable material such as hydraulic pressure cast iron, nodular cast iron, in pilot valve body, can be processed into two or more annular passs.Pilot valve is exactly that gap by motion spool and valve channel seals, the degree of sealing depends primarily on the size in gap, therefore, rising along with working pressure, gap must reduce, or covering degree must increase, to reach good sealing effect, but in fact just because of the high-precision requirement little to gap, make spool be prone to error in geometrical form and concentricity and change the radially unbalanced hydraulic coupling of spool causing, thereby cause the clamping situation of spool, as: spool machining error and with back taper, the spool that installation causes is in valve opening medium dip, the uneven radial force that spool high voltage terminal has different portion projection (or in fluid impurity) etc. to cause, uneven radial force be spool to valve opening near after, produce the frictional force that hinders valve core movement, after certain interval of time, axially in clamping, increase suddenly, even after pressure release, still stick to closely on hole wall, this is the blocking action due to the polar molecule in fluid, under high pressure, clamping force can increase along with the time, and finally reached a maximum value.The reasons such as additional drag while simultaneously moving due to other relevant machining errors, the spool of valve all easily cause the clamping of spool, claim that this is the spool clamping that radial force imbalance causes, this is this valve " congenital gene defect ", although the raising along with correlation technique levels such as spool design technology, processing technique, lube purification technology, the less appearance of this kind of clamping phenomenon, but still can be accidental, now hand is disclosed emergency operation and also cannot be moved, normal after replacing guide step valve, affected to a certain extent the production of producing line.
2, in the hydraulic applications of iron and steel enterprise, generally there is the feature that electro-hydraulic reversing valve model is many, main common electro-hydraulic reversing valve has " spring reset " (4WEH ... / ...) and " hydraulic reposition " (4WEH ... / H ...) two classes, this two classes selector valve has again dividing of 2 valves and 3 valves, the pilot-actuated valve of its common correspondence has three kinds: " three-position valve Y type meta (4WE6J ...) " " three-position valve P type meta 4WE6M ... " " two-position valve 4WE6D ... " different pilot valve corresponding to electro-hydraulic reversing valve, cause the on-the-spot management at hydrovalve, the replacing of pilot valve, the preparation of spare part all has certain complexity, be not easy to daily equipment control, when having increased expense, also increased workload.
Summary of the invention:
The object of the invention is to overcome the deficiency of above-mentioned prior art, and a kind of multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve is provided; Mainly solve core hydraulic that existing electro-hydraulic reversing valve causes because of radial force imbalance stuck and because of problems such as the management inconvenience increasing expense of hydrovalve and pilot valve and workloads.
Technological scheme of the present invention is: a kind of multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve, its special way is, by the first two-position three way cartridge valve and the second two-position three way cartridge valve and oil circuit control valve piece, be formed by connecting, on the first two-position three way cartridge valve and the second two-position three way cartridge valve, establish respectively hydraulic fluid port C, D, E and spool F; On described oil circuit control valve piece, establish oil circuit control H, I, J, K and oil circuit P, T, A, B; Oil circuit control K connects hydraulic fluid port D on the first two-position three way cartridge valve and the oil circuit A intercommunication of oil way valve block; Oil circuit control J connects hydraulic fluid port D on the second two-position three way cartridge valve and the oil circuit B intercommunication of oil way valve block; Oil circuit control H on oil circuit control valve piece connects hydraulic fluid port C and the oil circuit P intercommunication connecting on the first two-position three way cartridge valve 1 and the second two-position three way cartridge valve 2, and the oil circuit control on oil circuit control valve piece connects hydraulic fluid port E and the oil circuit T intercommunication connecting on the first two-position three way cartridge valve and the second two-position three way cartridge valve; Other oil circuits, hydraulic fluid port all do not communicate; The first auxiliary hole plug is established in the end of oil circuit control K, and the second auxiliary hole plug is established respectively in the end of oil circuit control H, J, I.
A kind of multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve of the present invention, its main feature is by two two-position three way cartridge valves, to control respectively foundation and the pressure release of the control-oil pressure at its main valve plug two ends, the control oil that is about to main valve plug one end is discharged into T mouth or will controls oil and introduce main valve plug end, thereby realize the action control of main valve plug, and finally realize the commutation of working connection.
Compared with the prior art a kind of multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve of the present invention has outstanding substantive distinguishing features and remarkable progress: 1, two of pilot valve modes that the gap that to control spool be not conventional pilot valves by motion spool and valve channel seals, but realize the open and close between oil circuit by the mode of conical surface seal, gap between spool and valve core channel is larger, is difficult to produce the clamping fault of hydraulic valve core; 2, pilot valve has changed a spool control guide oil condition, and turn, by two spools, control respectively main valve plug two ends control oil condition, realized the multifunctional general of hydraulic reposition, spring reset, two, three electro-hydraulic reversing valve pilot valves, change traditional inhomogeneity electro-hydraulic reversing valve and joined the situation of inhomogeneity pilot valve, alleviated the management of hydrovalve, the preparation difficulty of the replacing of pilot valve, spare part; 3, because pilot valve adopts the very ripe two-position three way cartridge valve of technology, part adds and guarantees precision man-hour, be combined into a high-precision pilot valve device, have simple in structure, install simple and easyly, flexible operation, without advantage such as change original valve member etc., alleviate to a certain extent the difficulty of fault judgement, reduced the manpower and materials cost of plant maintenance.
Accompanying drawing explanation:
Fig. 1 is the structural representation of two-position three way cartridge valve of the present invention;
Fig. 2 is that oil circuit of the present invention moves towards schematic diagram;
Fig. 3 is control principle drawing of the present invention;
Fig. 4 is use installation diagram of the present invention.
Embodiment:
For Comprehension and Implementation better, below in conjunction with accompanying drawing, provide specific embodiment and describe the present invention in detail; Illustrated embodiment is only for explaining the present invention, not for limiting the scope of the invention.
Embodiment 1, referring to Fig. 1,2,4, adopts ripe parts the first two-position three way cartridge valve 1, the second two-position three way cartridge valve 2, has hydraulic fluid port C, D, E and spool F on valve; The first two-position three way cartridge valve 1, the second two-position three way cartridge valve 2 are connected with oil circuit control valve piece 3, on oil circuit control valve piece 3, have oil circuit control H, I, J, K and oil circuit P, T, A, B; Oil circuit control K connects hydraulic fluid port D on the first two-position three way cartridge valve 1 and the oil circuit A intercommunication of oil way valve block 3, oil circuit control J connects hydraulic fluid port D on the second two-position three way cartridge valve 2 and the oil circuit B intercommunication of oil way valve block 3, oil circuit control H on oil circuit control valve piece 3 connects hydraulic fluid port C and the oil circuit control P intercommunication connecting on the first two-position three way cartridge valve 1 and the second two-position three way cartridge valve 2, and the oil circuit control I on oil circuit control valve piece 3 connects hydraulic fluid port E and oil circuit control (T) intercommunication connecting on the first two-position three way cartridge valve 1 and the second two-position three way cartridge valve 2; Other oil circuits, hydraulic fluid port all do not communicate; The first auxiliary hole plug 6 is installed in the end of oil circuit control K, and 5 three of the second auxiliary hole plugs are installed respectively in the end of oil circuit control H, J, I; In valve all must not electric situation, intercommunication between the hydraulic fluid port D of the first two-position three way cartridge valve 1 and the second two-position three way cartridge valve 2 and hydraulic fluid port E, inclusion seal between hydraulic fluid port D and hydraulic fluid port C, obtains electric situation contrary; Pilot valve 7 of the present invention is linked together by bolt 4 with selector valve main valve 8.
A kind of multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve of the present invention, its control principle (is shown in Fig. 3, the internal control internal drainage type three position directional valve of take is example): two-position three way cartridge valve 1, 2 control loops that form are pilot valve, P, T is main inlet and outlet of fuel channel, A, B is vent line, a, o, b is three function positions of selector valve, x, y enters for controlling oil, oil circuit, 1DT, 2DT is the electromagnet of two-position three way cartridge valve, when this selector valve main valve 8 is spring reset type selector valve, as need main valve plug to rest on meta, 1DT, 2DT is in power failure state, the fluid at main valve plug two ends is by the direct oil sump tank of two-position three way cartridge valve, selector valve main valve 8 remains on meta O position by spring, as need selector valve main valve 8 to rest on a position, realize the Control function of a position, electromagnet, 2DT obtains electric, 1DT dead electricity, control oil and through two-position three way cartridge valve 2, arrive the b end of main valve plug, the pressure oil of main valve plug a end is through two-position three way cartridge valve 1 oil sump tank simultaneously, pressure oil promotes main valve plug and arrives a end, realize the Control function of a position, same principle, realize the Control function of b position, 1DT obtains electric, 2DT dead electricity.
For hydraulic reposition type electro-hydraulic reversing valve, as need main valve plug to rest on meta, 1DT, 2DT is in obtaining electricity condition, main valve plug two ends are by two-position three way cartridge valve 1, 2 introduce control oil, main valve remains on meta O position by hydraulic coupling, as need main valve plug to rest on a position, realize the Control function of a position, electromagnet, 2DT obtains electric, 1DT dead electricity, control oil and through two-position three way cartridge valve 2, arrive the b end of main valve plug, the pressure oil of main valve plug a end is through two-position three way cartridge valve 1 oil sump tank simultaneously, pressure oil promotes main valve plug and arrives a end, realize the Control function of a position, same principle, realize the Control function of b position, 1DT obtains electric, 2DT dead electricity.
For two electro-hydraulic reversing valves, difference is only the meta control mode not having in the above, and other are similar, realize a position function, and 2DT obtains electric, and 1DT dead electricity realizes b position function, and 1DT obtains electric, 2DT dead electricity.
The above is internal control internal drainage type, for other external control formula, external control internal drainage type, the internal control formula that leaks that leaks, because domestic and international electro-hydraulic reversing valve changes, control screw plug that oil opens all in main valve level, and the present invention there is no direct relation, so control mode is as above-mentioned identical.
Claims (1)
1. a multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve, it is characterized in that, by the first two-position three way cartridge valve (1) and the second two-position three way cartridge valve (2), be formed by connecting with oil circuit control valve piece (3), on the first two-position three way cartridge valve (1) and the second two-position three way cartridge valve (2), establish respectively hydraulic fluid port (C, D, E) and spool (F); On described oil circuit control valve piece (3), establish oil circuit control (H, I, J, K) and oil circuit (P, T, A, B); Hydraulic fluid port (D) on oil circuit control (K) perforation the first two-position three way cartridge valve (1) and oil circuit (A) intercommunication of oil way valve block (3); Hydraulic fluid port (D) on oil circuit control (J) perforation the second two-position three way cartridge valve (2) and oil circuit (B) intercommunication of oil way valve block (3); Oil circuit control (H) on oil circuit control valve piece (3) connects the hydraulic fluid port (C) and oil circuit (P) intercommunication connecting on the first two-position three way cartridge valve (1) and the second two-position three way cartridge valve (2), and the oil circuit control (I) on oil circuit control valve piece (3) connects the hydraulic fluid port (E) and oil circuit (T) intercommunication connecting on the first two-position three way cartridge valve (1) and the second two-position three way cartridge valve (2); Other oil circuits, hydraulic fluid port all do not communicate; The first auxiliary hole plug (6) is established in the end of oil circuit control (K), and the second auxiliary hole plug (5) is established respectively in the end of oil circuit control (H, J, I).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410251458.4A CN104033438B (en) | 2014-06-09 | 2014-06-09 | A kind of multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410251458.4A CN104033438B (en) | 2014-06-09 | 2014-06-09 | A kind of multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve |
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| CN104033438A true CN104033438A (en) | 2014-09-10 |
| CN104033438B CN104033438B (en) | 2016-03-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065357A (en) * | 2015-08-07 | 2015-11-18 | 中山市文天长液压机械有限公司 | Electro-hydraulic directional valve |
| CN105201947A (en) * | 2015-10-19 | 2015-12-30 | 中国石油大学(北京) | Electrohydraulic reversing valve capable of maintaining valve position under hydraulic pressure |
| CN105605015A (en) * | 2016-02-29 | 2016-05-25 | 宁波高新区微动科技有限公司 | Integrated multi-way oil rotary distributor |
| CN110594227A (en) * | 2019-09-27 | 2019-12-20 | 昆山海芯机电科技有限公司 | Two-position three-way reversing valve with self-locking gas circuit |
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| US4986072A (en) * | 1989-08-31 | 1991-01-22 | Kabushiki Kaisha Kobe Seiko Sho | Hydraulic actuator circuit with flow-joining control |
| US5485724A (en) * | 1992-05-22 | 1996-01-23 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system |
| CN1160823A (en) * | 1996-03-30 | 1997-10-01 | 三星重工业株式会社 | Flow confluence apparatus for heavy equipment |
| CN201111563Y (en) * | 2007-09-27 | 2008-09-10 | 天津市天锻压力机有限公司 | Hydraulic integration liftout valve block |
| CN202789805U (en) * | 2012-08-21 | 2013-03-13 | 山东泰丰液压股份有限公司 | Hydraulic control device of electro-hydraulic feedback proportional throttling cartridge valve |
| CN103277541A (en) * | 2013-06-26 | 2013-09-04 | 杭州爱力领富科技有限公司 | Modularized electrohydraulic multi-way valve adopting novel combined slide valve and MINISO CVs |
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2014
- 2014-06-09 CN CN201410251458.4A patent/CN104033438B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4986072A (en) * | 1989-08-31 | 1991-01-22 | Kabushiki Kaisha Kobe Seiko Sho | Hydraulic actuator circuit with flow-joining control |
| US5485724A (en) * | 1992-05-22 | 1996-01-23 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system |
| CN1160823A (en) * | 1996-03-30 | 1997-10-01 | 三星重工业株式会社 | Flow confluence apparatus for heavy equipment |
| CN201111563Y (en) * | 2007-09-27 | 2008-09-10 | 天津市天锻压力机有限公司 | Hydraulic integration liftout valve block |
| CN202789805U (en) * | 2012-08-21 | 2013-03-13 | 山东泰丰液压股份有限公司 | Hydraulic control device of electro-hydraulic feedback proportional throttling cartridge valve |
| CN103277541A (en) * | 2013-06-26 | 2013-09-04 | 杭州爱力领富科技有限公司 | Modularized electrohydraulic multi-way valve adopting novel combined slide valve and MINISO CVs |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065357A (en) * | 2015-08-07 | 2015-11-18 | 中山市文天长液压机械有限公司 | Electro-hydraulic directional valve |
| CN105201947A (en) * | 2015-10-19 | 2015-12-30 | 中国石油大学(北京) | Electrohydraulic reversing valve capable of maintaining valve position under hydraulic pressure |
| CN105201947B (en) * | 2015-10-19 | 2017-04-12 | 中国石油大学(北京) | Electrohydraulic reversing valve capable of maintaining valve position under hydraulic pressure |
| CN105605015A (en) * | 2016-02-29 | 2016-05-25 | 宁波高新区微动科技有限公司 | Integrated multi-way oil rotary distributor |
| CN110594227A (en) * | 2019-09-27 | 2019-12-20 | 昆山海芯机电科技有限公司 | Two-position three-way reversing valve with self-locking gas circuit |
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| CN104033438B (en) | 2016-03-02 |
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