CN101893013A - Four-way reversing valve capable of retracting single-action hydraulic cylinder into piston with zero load - Google Patents
Four-way reversing valve capable of retracting single-action hydraulic cylinder into piston with zero load Download PDFInfo
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- CN101893013A CN101893013A CN 201010241337 CN201010241337A CN101893013A CN 101893013 A CN101893013 A CN 101893013A CN 201010241337 CN201010241337 CN 201010241337 CN 201010241337 A CN201010241337 A CN 201010241337A CN 101893013 A CN101893013 A CN 101893013A
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- oil
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- 239000012530 fluid Substances 0.000 claims description 81
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 67
- 239000002828 fuel tank Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000017105 transposition Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
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Abstract
The invention discloses a four-way reversing valve capable of retracting a single-action hydraulic cylinder into a piston with zero load, which has simple structure and can offset the friction of a cylinder body and the piston and other resistances of a system by relying on the pulling force produced by a hydraulic pump due to the inherent oil absorption pressure feature and further pull the piston back, so that the four-way reversing valve can overcome the defects that a machine using the single-action cylinder can not be retracted into the piston and only needs to be forced by relying on external force, thereby increasing the labor intensity, reducing the working efficiency and the like. The reversing valve mainly comprises a valve body and a valve core, and is characterized in that an oil port A on the valve body is connected with the hydraulic cylinder, the oil port A on the valve body is communicated with an oil port B on the valve body through the valve core, and the oil port B on the valve body is communicated with an oil suction port I of a hydraulic pump for sucking oil out of the hydraulic cylinder and pulling the piston back; an oil port P on the valve body is connected with an oil outlet U of the hydraulic pump; and the oil port P on the valve body is communicated with an oil port T on the valve body through the valve core, the oil port T on the valve body is connected with an oil tank, and the hydraulic pump sends the oil which is sucked out of the hydraulic cylinder into the oil tank.
Description
Technical field
The present invention relates to hydraulic machinery, relate in particular to the machinery that needs unloaded withdrawal piston when using single-action hydraulic cylinder.
Background technique
Use the hydraulic machinery of single-action hydraulic cylinder in the market, use be one-way valve, can not make oil hydraulic cylinder unloaded withdrawal piston under the effect of oil hydraulic pump, can only rely on outside application of force withdrawal, increase labor intensity, reduce working efficiency; The hydraulic machinery of working continuously now, no matter be carrying withdrawal piston, or zero load or underloading withdrawal piston, can only use double-acting hydraulic cylinder to finish, make machine-building complexity, the cost of zero load or underloading withdrawal piston higher.
Summary of the invention
The present invention seeks in order to overcome above shortcoming, a kind of four-way change-over valve of novel structure is provided, the pulling force that utilizes the intrinsic oil suction pressure of oil hydraulic pump to be produced on the single-action hydraulic cylinder piston balances out the frictional force between cylinder body and the piston and the resistance of the component of a system piston is pulled back.
The technical solution used in the present invention is:
Can make the four-way change-over valve of the unloaded withdrawal of single-action hydraulic cylinder piston, mainly comprise: valve body and spool; Mainly be provided with oil duct I and hydraulic fluid port A, hydraulic fluid port B, hydraulic fluid port T, hydraulic fluid port P on the described valve body; Mainly be provided with oil duct II and oil duct III on the described spool; Mainly be provided with hydraulic fluid port C, hydraulic fluid port D, hydraulic fluid port E and hydraulic fluid port F on the described oil duct II; Mainly be provided with hydraulic fluid port G and hydraulic fluid port H on the described oil duct III; It is characterized in that: when described four-way change-over valve was in end position state, the hydraulic fluid port A on the valve body communicated with hydraulic fluid port B on the valve body by the hydraulic fluid port on the spool, oil duct, and the hydraulic fluid port P on the valve body communicates with hydraulic fluid port T on the valve body by the hydraulic fluid port on the spool, oil duct.
Can make the four-way change-over valve of the unloaded withdrawal of single-action hydraulic cylinder piston, be to be in the hydraulic system that connects under the state of position, end at four-way change-over valve, utilizes the intrinsic oil suction pressure characteristic acting in conjunction of oil hydraulic pump to finish; Described hydraulic system mainly comprises four-way change-over valve, single-action hydraulic cylinder, oil hydraulic pump, fuel tank; The unloaded withdrawal of described single-action hydraulic cylinder piston, be to utilize under the piston area s2 acting in conjunction of oil suction pressure p2 that oil hydraulic pump produces and single-action hydraulic cylinder, the suction f2 (f2=p2*s2) of generation overcomes and piston is pulled back after the frictional force of single-action hydraulic cylinder piston; It is characterized in that: described four-way change-over valve is in the position, end, hydraulic fluid port A on the valve body links to each other with single-action hydraulic cylinder, hydraulic fluid port A on the valve body communicates with hydraulic fluid port B on the valve body by the hydraulic fluid port on the spool, oil duct, hydraulic fluid port B on the valve body communicates with the inlet port I of oil hydraulic pump, oily sucking-off in the single-action hydraulic cylinder retracts piston; Hydraulic fluid port P on the valve body links to each other with the oil outlet U of oil hydraulic pump, and the hydraulic fluid port P on the valve body communicates with hydraulic fluid port T on the valve body by the hydraulic fluid port on the spool, oil duct, and the hydraulic fluid port T on the valve body links to each other with fuel tank, and oil hydraulic pump goes out to send into fuel tank to oil pressure.
The invention has the beneficial effects as follows:
1, this four-way change-over valve can make the unloaded withdrawal of single-action hydraulic cylinder piston under the effect of oil hydraulic pump, is specially adapted to the simple and mechanical of track lifting and lining tool, jack, top pick and other usefulness horizontal hydraulic cylinder, increases work efficiency, and reduces labor intensity;
2, also can transform those and be forced to use the hydraulic machinery that double-acting hydraulic cylinder is finished needs zero load, underloading or horizontal cylinders withdrawal piston, become the machinery that uses single-action hydraulic cylinder, make and make simple, saving cost.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a structure principal section schematic representation of the present invention.
Fig. 2 is the A-A sectional drawing among Fig. 1.
Fig. 3 is an embodiment of the present invention hydraulic principle schematic representation.
Among the figure: 1-four-way change-over valve, 11-valve body, 12-spool, 111-oil duct I, 121-oil duct II, 122-oil duct III, 1111-hydraulic fluid port A, 1112-hydraulic fluid port B, 1113-hydraulic fluid port T, 1114-hydraulic fluid port P, 1211-hydraulic fluid port C, 1212-hydraulic fluid port D, 1213-hydraulic fluid port E, 1214-hydraulic fluid port F, 1221-hydraulic fluid port G, 1222-hydraulic fluid port H, the 2-single-action hydraulic cylinder, 21-piston, 3-oil hydraulic pump, 31-inlet port I, 32-oil outlet U, 4-fuel tank.
Embodiment
As shown in Figures 1 to 3, can make the four-way change-over valve 1 of single-action hydraulic cylinder 2 unloaded withdrawal pistons 21, be to be in the hydraulic system that connects under the state of position, end at four-way change-over valve 1, utilizes oil hydraulic pump 3 intrinsic oil suction pressure characteristics actings in conjunction to finish; Described four-way change-over valve 1 embodiment is a three-position four-way valve (also can adopt two-position four-way valve), and four-way change-over valve 1 mainly comprises: valve body 11 and spool 12; Mainly be provided with oil duct I111 on the described valve body 11, mainly be provided with hydraulic fluid port A1111, hydraulic fluid port B1112, hydraulic fluid port T1113, hydraulic fluid port P1114 on the oil duct I111; Mainly be provided with oil duct II121 and oil duct III122 on the described spool 12; Mainly be provided with hydraulic fluid port C1211, hydraulic fluid port D1212, hydraulic fluid port E1213 and hydraulic fluid port F1214 on the described oil duct II121; Mainly be provided with hydraulic fluid port G1221 and hydraulic fluid port H1222 on the described oil duct III122; The described single-action hydraulic cylinder 2 unloaded four-way change-over valves 1 of withdrawing pistons 21 that can make are to be in position, selector valve end state, finish under the effect of oil hydraulic pump 3; It is characterized in that: the hydraulic fluid port A1111 on the valve body 11, oil duct I111 communicate with hydraulic fluid port B1112 on the valve body 11 by the hydraulic fluid port F1214 on the spool 12, oil duct II121, hydraulic fluid port E1213, and the hydraulic fluid port P1114 on the valve body 11 communicates with hydraulic fluid port T1113 on the valve body 11 by the hydraulic fluid port G1221 on the spool 12, oil duct III122, hydraulic fluid port H1222.
Can make the four-way change-over valve 1 of single-action hydraulic cylinder 2 unloaded withdrawal pistons 21, be to be in the hydraulic system that connects under the state of position, end at four-way change-over valve 1, utilizes oil hydraulic pump 3 intrinsic oil suction pressure characteristic actings in conjunction to finish; Described hydraulic system mainly comprises four-way change-over valve 1, single-action hydraulic cylinder 2, oil hydraulic pump 3, fuel tank 4; It is characterized in that: the hydraulic fluid port A1111 on the described four-way change-over valve 1 links to each other with single-action hydraulic cylinder 2; Hydraulic fluid port B1112 on the described four-way change-over valve 1 links to each other with the inlet port I31 of oil hydraulic pump 2; Hydraulic fluid port P1114 on the described four-way change-over valve 1 links to each other with the oil outlet U32 of oil hydraulic pump 3; Hydraulic fluid port T1113 on the described four-way change-over valve 1 links to each other with fuel tank 4.
Retract piston 21 when the zero load in order to reach described single-action hydraulic cylinder 2, the concrete annexation of hydraulic system is as follows: the inlet port I31 on the described oil hydraulic pump 3 links to each other with hydraulic fluid port B1112 on the valve body 11, hydraulic fluid port B1112 on the valve body 11 is by the hydraulic fluid port E1213 on the spool 12, oil duct II121, oil duct I111 on hydraulic fluid port F1214 and the valve body 11, hydraulic fluid port A1111 communicates, hydraulic fluid port A1111 and single-action hydraulic cylinder 2 on the valve body 11 join, utilize the intrinsic oil suction pressure p2 characteristic of oil hydraulic pump 3, oily sucking-off, produce suction f2 (f2=p2*s2) on the piston 21 area s2 of single-action hydraulic cylinder 2, f2 after overcoming piston 21 frictional force of single-action hydraulic cylinder 2 pulls back piston 21; Oil outlet U32 on the described oil hydraulic pump 3 links to each other with hydraulic fluid port P1114 on the valve body 11, hydraulic fluid port P1114 on the valve body 11 communicates with hydraulic fluid port T1113 on the valve body 11 by the hydraulic fluid port G1221 on the spool 12, oil duct III122, hydraulic fluid port H1222, hydraulic fluid port T1113 and fuel tank 4 on the valve body 11 join, and oil hydraulic pump 3 is pressed into fuel tank 4 to the oil that sucks by oil outlet U32.
Shown in Fig. 3 embodiment, when described four-way change-over valve 1 was in the first state, oil hydraulic pump 3 from fuel tank 4 oil suctions, was pressure the hydraulic oil of p1 send into single-action hydraulic cylinder 2 through oil outlet U32 through inlet port I31, and piston 21 is stretched out; When described four-way change-over valve 1 is in the meta state, shown slide valve function (also can manufacture the slide valve function of other patterns) effect down, the piston 21 of single-action hydraulic cylinder 2 is freely fallen after rise under the compressing of load, and piston 21 is the hydraulic oil pressure oil sump tank 4 in the oil hydraulic cylinder; When described four-way change-over valve 1 was in position, end state, oil hydraulic pump 3 the hydraulic oil sucking-off of single-action hydraulic cylinder 3, was sent into fuel tank 4 through oil outlet U32 through inlet port I31, and the piston 21 of single-action hydraulic cylinder 3 retracts under the oil suction pressure p2 of oil hydraulic pump 3 effect; By four-way change-over valve 1 transposition to the position, end from the first place, single-action hydraulic cylinder 2 has been finished piston 21 from reaching the overall process of withdrawal under the effect of oil hydraulic pump 3.
The transposition of four-way change-over valve 1 is to be finished by the control mechanism of selector valve, and that the maneuverability pattern of control mechanism can manufacture as required is manual, electronic, surge, motor-driven, pneumatic, various forms such as electricity surges.
Claims (1)
1. can make the four-way change-over valve of the unloaded withdrawal of single-action hydraulic cylinder piston, mainly comprise: valve body and spool; Mainly be provided with oil duct I and hydraulic fluid port A, hydraulic fluid port B, hydraulic fluid port T, hydraulic fluid port P on the described valve body; Mainly be provided with hydraulic fluid port and oil duct on the described spool; It is characterized in that: when described four-way change-over valve was in end position state, the hydraulic fluid port A on the valve body communicated with hydraulic fluid port B on the valve body by the hydraulic fluid port on the spool, oil duct, and the hydraulic fluid port P on the valve body communicates with hydraulic fluid port T on the valve body by the hydraulic fluid port on the spool, oil duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010241337 CN101893013A (en) | 2010-07-26 | 2010-07-26 | Four-way reversing valve capable of retracting single-action hydraulic cylinder into piston with zero load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010241337 CN101893013A (en) | 2010-07-26 | 2010-07-26 | Four-way reversing valve capable of retracting single-action hydraulic cylinder into piston with zero load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101893013A true CN101893013A (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010241337 Pending CN101893013A (en) | 2010-07-26 | 2010-07-26 | Four-way reversing valve capable of retracting single-action hydraulic cylinder into piston with zero load |
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| CN (1) | CN101893013A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2134569C3 (en) * | 1970-07-06 | 1979-04-19 | Abex Corp., New York, N.Y. (V.St.A.) | Hydraulic speed control |
| CN1312216A (en) * | 2000-03-06 | 2001-09-12 | 胡宣哲 | Fully automatic hydraulic jack |
| CN2448971Y (en) * | 2000-11-06 | 2001-09-19 | 徐述铎 | Vacuum oil pumping machine |
| CN1739035A (en) * | 2003-01-17 | 2006-02-22 | 医疗物理有限公司 | Pump system and method for delivering hyperpolarized gas |
| CN101303005A (en) * | 2008-06-26 | 2008-11-12 | 中国地质大学（武汉） | Hydraulic cylinder automatic reciprocating air compressor |
| WO2009152402A2 (en) * | 2008-06-13 | 2009-12-17 | Carrier Corporation | Four-way reversing valve |
| CN101634318A (en) * | 2008-07-25 | 2010-01-27 | 通用汽车环球科技运作公司 | Torque transmitting device actuation system using a piezoelectric pump |
| JP2010503798A (en) * | 2006-09-14 | 2010-02-04 | ルーク ラメレン ウント クツプルングスバウ ベタイリグングス コマンディートゲゼルシャフト | Hydraulic system for supplying hydraulic fluid to the consumer |
| CN201723522U (en) * | 2010-07-26 | 2011-01-26 | 张长友 | Four-way reversing valve capable of leading piston of single-action hydraulic cylinder to retract in no-load state |
-
2010
- 2010-07-26 CN CN 201010241337 patent/CN101893013A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2134569C3 (en) * | 1970-07-06 | 1979-04-19 | Abex Corp., New York, N.Y. (V.St.A.) | Hydraulic speed control |
| CN1312216A (en) * | 2000-03-06 | 2001-09-12 | 胡宣哲 | Fully automatic hydraulic jack |
| CN2448971Y (en) * | 2000-11-06 | 2001-09-19 | 徐述铎 | Vacuum oil pumping machine |
| CN1739035A (en) * | 2003-01-17 | 2006-02-22 | 医疗物理有限公司 | Pump system and method for delivering hyperpolarized gas |
| JP2010503798A (en) * | 2006-09-14 | 2010-02-04 | ルーク ラメレン ウント クツプルングスバウ ベタイリグングス コマンディートゲゼルシャフト | Hydraulic system for supplying hydraulic fluid to the consumer |
| WO2009152402A2 (en) * | 2008-06-13 | 2009-12-17 | Carrier Corporation | Four-way reversing valve |
| CN101303005A (en) * | 2008-06-26 | 2008-11-12 | 中国地质大学（武汉） | Hydraulic cylinder automatic reciprocating air compressor |
| CN101634318A (en) * | 2008-07-25 | 2010-01-27 | 通用汽车环球科技运作公司 | Torque transmitting device actuation system using a piezoelectric pump |
| CN201723522U (en) * | 2010-07-26 | 2011-01-26 | 张长友 | Four-way reversing valve capable of leading piston of single-action hydraulic cylinder to retract in no-load state |
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| PB01 | Publication | ||
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Application publication date: 20101124 |