CN104033438B - A kind of multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve - Google Patents
A kind of multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve Download PDFInfo
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- CN104033438B CN104033438B CN201410251458.4A CN201410251458A CN104033438B CN 104033438 B CN104033438 B CN 104033438B CN 201410251458 A CN201410251458 A CN 201410251458A CN 104033438 B CN104033438 B CN 104033438B
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Abstract
The invention discloses a kind of multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve, be characterized in, be formed by connecting with oil circuit control valve block (3) by the first two-position three way cartridge valve (1) and the second two-position three way cartridge valve (2), the first two-position three way cartridge valve (1) and the second two-position three way cartridge valve (2) establish hydraulic fluid port (C, D, E) and spool (F) respectively; Described oil circuit control valve block (3) is established oil circuit control (H, I, J, K) and oil circuit (P, T, A, B); The first auxiliary hole plug (6) is established in the end of oil circuit control (K), and the end of oil circuit control (H, J, I) establishes the second auxiliary hole plug (5) respectively; There is structure simple, installing simple and easy, flexible operation, without the need to changing the advantages such as original valve member, alleviating the difficulty of breakdown judge to a certain extent, decrease the manpower and materials cost of plant maintenance.
Description
Technical field:
The present invention relates to technical field of metallurgical machinery, a kind of multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve, is widely used in the secondary electro-hydraulic reversing valve in metallurgical machinery in hydraulic system specifically.
Background technique:
At present, in some metallurgical machineries, hydraulic system is complicated, overlap as PQF Hot Line has main line hydraulic system 8, valve platform 70, electric liquid reversing control valve group reaches more than 400 groups, and electro-hydraulic reversing valve all adopts the 4WEH type selector valve of German BOSCH-REXROTH company, for controlling the unlatching of liquid stream, stopping and direction, such valve working stability is reliable, action is accurate, automaticity is high, long service life, effectively meets device action demand, has become the hydraulic control component be most widely used.But two defects (described model is BOSCH-REXROTH standard) below main existence in production application:
What 1, the pilot valve of 4WEH type secondary electro-hydraulic reversing valve generally adopted is 4WE6 type electromagnetism direct-acting type direction sliding valve, the switching realizing valve core of main valve is switched by the action of pilot valve, thus 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, can be processed into two or more annular pass in pilot valve body.Pilot valve is exactly sealed by the gap of motion spool and valve channel, the degree of sealing depends primarily on the size in gap, therefore, along with the rising of 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, spool is easily occurred, and error in geometrical form and concentricity change the radial unbalanced hydraulic coupling of the spool caused, thus 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 is that spool is after valve opening is close, produce the frictional force hindering valve core movement, after certain interval of time, axially increase suddenly in clamping, even still stick to closely on hole wall after pressure release, 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 reaches a maximum value.Simultaneously because the reasons such as additional drag when other relevant machining errors of valve, spool move all easily cause the clamping of spool, this is claimed to be the spool clamping that radial force imbalance causes, this is this valve " congenital gene defect ", although along with the raising of the 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 run, normal after changing guide's step valve, have impact on the production of producing line to a certain extent.
2, in the hydraulic applications of iron and steel enterprise, generally there is the feature that electro-hydraulic reversing valve model is many, mainly common electro-hydraulic reversing valve has " spring reset " (4WEH ... / ...) and " hydraulic reposition " (4WEH ... / H ...) two classes, this two classes selector valve have again 2 valves and 3 valves point, 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 ... " the pilot valve that different electro-hydraulic reversing valves is corresponding different, 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, workload is too increased while adding expense.
Summary of the invention:
The object of the invention is the deficiency overcoming above-mentioned prior art, and a kind of multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve is provided; Mainly solve existing electro-hydraulic reversing valve because the core hydraulic that causes of radial force imbalance is stuck and increase the problem such as expense and workload because of the management inconvenience of hydrovalve and pilot valve.
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, be formed by connecting by the first two-position three way cartridge valve and the second two-position three way cartridge valve and oil circuit control valve block, first two-position three way cartridge valve is established a C hydraulic fluid port, a D hydraulic fluid port, an E hydraulic fluid port and the first spool, the second two-position three way cartridge valve is established the 2nd C ' hydraulic fluid port, the 2nd D ' hydraulic fluid port, the 2nd E ' hydraulic fluid port and the second spool; Described oil circuit control valve block is established the 3rd H oil circuit control, the 3rd I oil circuit control, the 3rd J oil circuit control, the 3rd K oil circuit control and the 3rd P oil circuit, the 3rd T oil circuit, the 3rd A oil circuit, the 3rd B oil circuit; A D hydraulic fluid port on the through first two-position three way cartridge valve of 3rd K oil circuit control and the 3rd A oil circuit intercommunication of oil way valve block; The 2nd D ' hydraulic fluid port on the through second two-position three way cartridge valve of 3rd J oil circuit control and the 3rd B oil circuit intercommunication of oil way valve block; The 3rd H oil circuit control through connection first two-position three way cartridge valve on oil circuit control valve block and the C hydraulic fluid port on the second two-position three way cartridge valve and the 2nd C ' hydraulic fluid port and the 3rd P oil circuit intercommunication, the 3rd I oil circuit control through connection first two-position three way cartridge valve on oil circuit control valve block and the E hydraulic fluid port on the second two-position three way cartridge valve and the 2nd E ' hydraulic fluid port and the 3rd T oil circuit intercommunication; Other oil circuits, hydraulic fluid port all do not communicate; The first auxiliary hole plug is established in the end of the 3rd K oil circuit control, and the end of the 3rd H oil circuit control, the 3rd I oil circuit control, the 3rd J oil circuit control establishes the second auxiliary hole plug respectively.
The multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve of one of the present invention, its main feature is the foundation and the pressure release that are controlled the control-oil pressure at its main valve plug two ends by two two-position three way cartridge valves respectively, control oil by main valve plug one end is discharged into T mouth or will controls oil introduces main valve plug end, thus 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: mode that to be not conventional pilot valves sealed by the gap of motion spool and valve channel that 1, two of pilot valve control spools, but realize the open and close between oil circuit by the mode of conical surface seal, gap between spool and valve core channel is comparatively large, is difficult to the clamping fault producing hydraulic valve core; 2, pilot valve changes a spool and controls guide's oil condition, and turn by two spools control bound core two ends control oil condition respectively, achieve the multifunctional general of hydraulic reposition, spring reset, two, three electro-hydraulic reversing valve pilot valves, change the situation that traditional inhomogeneity electro-hydraulic reversing valve joins inhomogeneity pilot valve, alleviate the management of hydrovalve, the replacing of pilot valve, the preparation difficulty of spare part; 3, because pilot valve adopts the two-position three way cartridge valve that technology is very ripe, part adds and ensures precision man-hour, be combined into a high-precision pilot valve device, there is structure simple, install simple and easy, flexible operation, without the need to changing the advantages such as original valve member, alleviate the difficulty of breakdown judge to a certain extent, decrease the manpower and materials cost of plant maintenance.
Accompanying drawing illustrates:
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:
In order to Comprehension and Implementation better, provide specific embodiment below in conjunction with accompanying drawing and describe the present invention in detail; Illustrated embodiment, only for explaining the present invention, is not for limiting the scope of the invention.
Embodiment 1, see Fig. 1,2,4, adopts ripe parts first two-position three way cartridge valve 1, second two-position three way cartridge valve 2, valve has hydraulic fluid port C, D, E and spool F; First two-position three way cartridge valve 1, second two-position three way cartridge valve 2 is connected with oil circuit control valve block 3, oil circuit control valve block 3 has oil circuit control H, I, J, K and oil circuit P, T, A, B; Hydraulic fluid port D on the through first two-position three way cartridge valve 1 of oil circuit control K and the oil circuit A intercommunication of oil way valve block 3, hydraulic fluid port D on the through second two-position three way cartridge valve 2 of oil circuit control J and the oil circuit B intercommunication of oil way valve block 3, oil circuit control H through connection first two-position three way cartridge valve 1 on oil circuit control valve block 3 and the hydraulic fluid port C on the second two-position three way cartridge valve 2 and oil circuit control P intercommunication, the oil circuit control I through connection first two-position three way cartridge valve 1 on oil circuit control valve block 3 and the hydraulic fluid port E on the second two-position three way cartridge valve 2 and oil circuit control T intercommunication; 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 the end of oil circuit control H, J, I installs the second auxiliary hole plug 5 three respectively; All must not in electric situation at valve, 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 then contrary; Pilot valve 7 of the present invention is linked together by bolt 4 with selector valve main valve 8.
The multi-functional anti-hydraulic lock electro-hydraulic reversing valve pilot valve of one of the present invention, its control principle is (see Fig. 3, for internal control internal drainage type three position directional valve): two-position three way cartridge valve 1, the control loop of 2 compositions is 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, meta is rested on as needed main valve plug, 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, a position is rested on as needed selector valve main valve 8, realize the Control function of a position, electromagnet, 2DT obtains electric, 1DT dead electricity, control oil arrives main valve plug b end through two-position three way cartridge valve 2, 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, meta is rested on as needed main valve plug, 1DT, 2DT is in obtain 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, a position is rested on as needed main valve plug, realize the Control function of a position, electromagnet, 2DT obtains electric, 1DT dead electricity, control oil arrives main valve plug b end through two-position three way cartridge valve 2, 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 do not had in the above, and other are similar, and namely realize a position function, 2DT obtains electric, 1DT dead electricity, and realize b position function, 1DT obtains electric, 2DT dead electricity.
The above is internal control internal drainage type, leak formula, external control internal drainage type, the internal control of external control for other leaks formula, control the oily screw plug opened all in main valve level because domestic and international electro-hydraulic reversing valve changes, and the present invention there is no direct relation, therefore 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, be formed by connecting with oil circuit control valve block (3) by the first two-position three way cartridge valve (1) and the second two-position three way cartridge valve (2), first two-position three way cartridge valve (1) is established a C hydraulic fluid port (C), a D hydraulic fluid port (D), an E hydraulic fluid port (E) and the first spool (F), the second two-position three way cartridge valve (2) is established the 2nd C ' hydraulic fluid port (C '), the 2nd D ' hydraulic fluid port (D '), the 2nd E ' hydraulic fluid port (E ') and the second spool (F '); Described oil circuit control valve block (3) is established the 3rd H oil circuit control (H), the 3rd I oil circuit control (I), the 3rd J oil circuit control (J), the 3rd K oil circuit control (K) and the 3rd P oil circuit (P), the 3rd T oil circuit (T), the 3rd A oil circuit (A), the 3rd B oil circuit (B); 3rd A oil circuit (A) intercommunication of the D hydraulic fluid port (D) on the through first two-position three way cartridge valve (1) of the 3rd K oil circuit control (K) and oil way valve block (3); 3rd B oil circuit (B) intercommunication of the 2nd D ' hydraulic fluid port on the through second two-position three way cartridge valve (2) of the 3rd J oil circuit control (J) (D ') and oil way valve block (3); The 3rd H oil circuit control (H) through connection first two-position three way cartridge valve (1) on oil circuit control valve block (3) and the C hydraulic fluid port (C) on the second two-position three way cartridge valve (2) and the 2nd C ' hydraulic fluid port (C ') and the 3rd P oil circuit (P) intercommunication, the 3rd I oil circuit control (I) through connection first two-position three way cartridge valve (1) on oil circuit control valve block (3) and the E hydraulic fluid port (E) on the second two-position three way cartridge valve (2) and the 2nd E ' hydraulic fluid port (E ') and the 3rd T oil circuit (T) intercommunication; Other oil circuits, hydraulic fluid port all do not communicate; The first auxiliary hole plug (6) is established in the end of the 3rd K oil circuit control (K), and the end of the 3rd H oil circuit control (H), the 3rd I oil circuit control (I), the 3rd J oil circuit control (J) establishes the second auxiliary hole plug (5) respectively.
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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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| 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 CN104033438A (en) | 2014-09-10 |
| CN104033438B true CN104033438B (en) | 2016-03-02 |
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| CN105065357B (en) * | 2015-08-07 | 2017-03-15 | 中山市文天长液压机械有限公司 | A kind of electro-hydraulic reversing valve |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4986072A (en) * | 1989-08-31 | 1991-01-22 | Kabushiki Kaisha Kobe Seiko Sho | Hydraulic actuator circuit with flow-joining control |
| JPH06123123A (en) * | 1992-05-22 | 1994-05-06 | Hitachi Constr Mach Co Ltd | Hydraulic driving device |
| KR0185493B1 (en) * | 1996-03-30 | 1999-04-01 | 토니헬샴 | Flow merging 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 |
| CN103277541B (en) * | 2013-06-26 | 2015-07-08 | 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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