CN103557197A - Oil quick-returning-discharging circuit for oil cylinder of hydraulic machine - Google Patents
Oil quick-returning-discharging circuit for oil cylinder of hydraulic machine Download PDFInfo
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- CN103557197A CN103557197A CN201310588160.8A CN201310588160A CN103557197A CN 103557197 A CN103557197 A CN 103557197A CN 201310588160 A CN201310588160 A CN 201310588160A CN 103557197 A CN103557197 A CN 103557197A
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Abstract
The invention relates to an oil return circuit for an oil cylinder, in particular to an oil quick-returning-discharging circuit for an oil cylinder of a hydraulic machine. The oil quick-returning-discharging circuit comprises the oil cylinder and a main reversing valve, wherein the oil cylinder is vertically arranged; the main reversing valve is provided with a first oil outlet, a second oil outlet, an oil inlet and an oil return opening; the first oil outlet of the main reversing valve is connected with the lower cavity of the oil cylinder through an oil pipe; the oil return opening of the main reversing valve is connected with an oil tank through an oil pipe. The oil quick-returning-discharging circuit is characterized in that the lower cavity of the oil cylinder is connected with the oil inlet of the main reversing valve through an oil pipe; the second oil outlet of the main reversing valve is connected with the oil tank through an oil pipe. The oil quick-returning-discharging circuit can achieve the oil quick-returning effect of the oil cylinder of the hydraulic machine under the condition that the diameters of the first oil outlet and the oil return opening of the main reversing valve are not enlarged and no special oil return electromagnetic valve is additionally arranged, so that the manufacturing cost is lowered.
Description
Technical field
The present invention relates to a kind of oil cylinder and move back oil return line, is that hydraulic press cylinder is return quick oil-discharging loop specifically.
Background technique
Hydraulic press is normally controlled the number of compressed oil in oil cylinder cavity of resorption and is carried out pilot pressure, in order to realize this control, the oil cylinder cavity of resorption of hydraulic press all needs to carry out oil suction and oil extraction, and in order to improve the working efficiency of hydraulic press, the oil cylinder cavity of resorption of hydraulic press needs quick oil-discharging conventionally.
At present, the hydraulic press cylinder in industry is return oil-discharging circuit, comprises oil cylinder and main reversing valve, and oil cylinder is vertical; Main reversing valve has the first oil outlet, the second oil outlet, filler opening and return opening; The first oil outlet of main reversing valve is connected with oil cylinder cavity of resorption by oil pipe, and the return opening of main reversing valve is connected with fuel tank by oil pipe, and the filler opening of main reversing valve is only for being connected with the oil pump to this loop pump oil; In main reversing valve when energising,, the oil circuit in main reversing valve is respectively return opening from the first oil outlet of main reversing valve to main reversing valve, the second oil outlet from the filler opening of main reversing valve to main reversing valve.This hydraulic press cylinder is return oil-discharging circuit and is normally increased the bore of the first oil outlet and return opening on main reversing valve or set up the oil return solenoid valve that special oil return is used in order to realize the effect of quick oil return, and the filler opening of main reversing valve cuts little ice when the oil return of oil cylinder cavity of resorption.But the bore of the first oil outlet and return opening is subject to the restriction of valve body size on main reversing valve, can not infinitely increase, and set up the oil return solenoid valve that special oil return uses, can make the manufacture cost of hydraulic press oil-discharging circuit increase.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of hydraulic press cylinder and returns quick oil-discharging loop, this oil-discharging circuit can be in the situation that do not increase the bore of the first oil outlet and return opening on main reversing valve and do not set up the oil return solenoid valve that special oil return is used, the quick oil-discharging effect that just can realize hydraulic press cylinder, has reduced manufacture cost.
For addressing the above problem, take following scheme:
Hydraulic press cylinder of the present invention is return quick oil-discharging loop and is comprised oil cylinder and main reversing valve, and oil cylinder is vertical.Main reversing valve has the first oil outlet, the second oil outlet, filler opening and return opening.The first oil outlet of main reversing valve is connected with oil cylinder cavity of resorption by oil pipe, and the return opening of main reversing valve is connected with fuel tank by oil pipe.Be characterized in that oil cylinder cavity of resorption is connected by the filler opening of oil pipe and main reversing valve, the second oil outlet of main reversing valve is connected with fuel tank by oil pipe.
To the further improvement project of the present invention, be that the height of described oil cylinder position is higher than the height of fuel tank position.Two position four-way solenoid valve positions are between oil cylinder position and fuel tank position.Improved like this advantage is to be more conducive to oil from oil cylinder, to enter into fuel tank.
Adopt above scheme, have the following advantages:
The first oil outlet of returning the main reversing valve in quick oil-discharging loop due to hydraulic press cylinder of the present invention is connected with oil cylinder cavity of resorption by oil pipe, the return opening of main reversing valve is connected with fuel tank by oil pipe, oil cylinder cavity of resorption is connected by the filler opening of oil pipe and main reversing valve simultaneously, and the second oil outlet of main reversing valve is connected with fuel tank by oil pipe.During oil return, oil in oil cylinder enters in the first oil outlet and filler opening on main reversing valve by oil pipe, main reversing valve is controlled and to be entered into return opening and the second oil outlet that the first oil outlet of main reversing valve and the oil content of filler opening do not flow to main reversing valve, and the oil content that enters into return opening and the second oil outlet does not enter into fuel tank by the oil pipe being connected with them.So just there are two oil pipe oil returns at the same time, in the situation that do not increase the bore of the first oil outlet and return opening on main reversing valve or set up the oil return solenoid valve that special oil return uses and just improved the efficiency of oil return, avoided increasing the bore of first oil outlet and return opening on main reversing valve, be subject to the problem of main reversing valve body size restriction, avoided setting up the problem that oil return solenoid valve that special oil return uses increases hydraulic press oil-discharging circuit manufacture cost.
Accompanying drawing explanation
Fig. 1 is the structure principle chart that hydraulic press cylinder of the present invention is return quick oil-discharging loop.
Embodiment
Below in conjunction with accompanying drawing, the hydraulic press cylinder of invention being return to quick oil-discharging loop is described in further detail.
As shown in Figure 1, hydraulic press cylinder of the present invention is return quick oil-discharging loop and is comprised oil cylinder 1 and main reversing valve 2, and oil cylinder 1 is vertical.Main reversing valve 2 has the first oil outlet B, the second oil outlet A, oil inlet P and oil return inlet T.The first oil outlet B of main reversing valve 2 is connected with oil cylinder 1 cavity of resorption by oil pipe, the oil inlet P of main reversing valve 2 is connected with oil cylinder 1 cavity of resorption by oil pipe, the oil return inlet T of main reversing valve 2 is connected with fuel tank 3 by oil pipe, and the second oil outlet A of main reversing valve 2 is connected with fuel tank 3 by oil pipe.The height of 1 position of oil cylinder described in the present embodiment is higher than the height of fuel tank 3 positions; Described main reversing valve 2 positions are between oil cylinder 1 position and fuel tank 3 positions.
During work, effect due to weight on oil cylinder 1 piston rod, oil in oil cylinder 1 enters in the first oil outlet B and oil inlet P on main reversing valve 2 by oil pipe, main reversing valve 2 is controlled and is entered into oil return inlet T and the second oil outlet A that the first oil outlet B of main reversing valve 2 and the oil content of oil inlet P do not flow to main reversing valve 2, and the oil content that enters into oil return inlet T and the second oil outlet A does not enter into fuel tank 3 by the oil pipe being connected with them.
Claims (2)
1. hydraulic press cylinder is return quick oil-discharging loop, comprises oil cylinder (1) and main reversing valve (2), and oil cylinder (1) is vertical; Main reversing valve (2) has the first oil outlet (B), the second oil outlet (A), filler opening (P) and return opening (T); First oil outlet (B) of main reversing valve (2) is connected with oil cylinder (1) cavity of resorption by oil pipe, and the return opening (T) of main reversing valve (2) is connected with fuel tank (3) by oil pipe; It is characterized in that oil cylinder (1) cavity of resorption is connected by the filler opening (P) of oil pipe and main reversing valve (2), second oil outlet (A) of main reversing valve (2) is connected with fuel tank (3) by oil pipe.
2. hydraulic press cylinder as claimed in claim 1 is return quick oil-discharging loop, it is characterized in that the height of described oil cylinder (1) position is higher than the height of fuel tank (3) position; Described main reversing valve (2) position is between oil cylinder (1) position and fuel tank (3) position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310588160.8A CN103557197B (en) | 2013-11-21 | 2013-11-21 | Oil quick-returning-disccircuit circuit for oil cylinder of hydraulic machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310588160.8A CN103557197B (en) | 2013-11-21 | 2013-11-21 | Oil quick-returning-disccircuit circuit for oil cylinder of hydraulic machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103557197A true CN103557197A (en) | 2014-02-05 |
| CN103557197B CN103557197B (en) | 2015-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310588160.8A Active CN103557197B (en) | 2013-11-21 | 2013-11-21 | Oil quick-returning-disccircuit circuit for oil cylinder of hydraulic machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822628A (en) * | 2016-04-27 | 2016-08-03 | 安徽合力股份有限公司 | Pneumatic oil discharge system of hydraulic oil cylinder |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1401374A (en) * | 1972-02-22 | 1975-07-16 | Putzmeister Interholding Gmbh | Apparatus for damping the pressure increase of hydrostatic drives |
| JPS58174703A (en) * | 1982-04-03 | 1983-10-13 | Kato Seisakusho:Kk | Speed control device for actuator |
| JPH06307407A (en) * | 1993-04-20 | 1994-11-01 | Furukawa Co Ltd | Valve block for hydraulic cylinder |
| JPH1121941A (en) * | 1997-07-01 | 1999-01-26 | Yutani Heavy Ind Ltd | Hydraulic controller for hydraulic backhoe |
| JP2001317504A (en) * | 2000-05-01 | 2001-11-16 | Shin Caterpillar Mitsubishi Ltd | Cylinder actuator control method and device |
| CN1836110A (en) * | 2003-08-20 | 2006-09-20 | 株式会社小松制作所 | Hydraulic drive control device |
| CN102562700A (en) * | 2012-01-20 | 2012-07-11 | 锦州市力特缸泵阀液压制造有限公司 | Combined-type multi-way reversing valve for coal-mine full-hydraulic underground drilling machine |
| CN203560194U (en) * | 2013-11-21 | 2014-04-23 | 无锡市蓝力机床有限公司 | Retreating type rapid oil discharging circuit of oil cylinder of hydraulic machine |
-
2013
- 2013-11-21 CN CN201310588160.8A patent/CN103557197B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1401374A (en) * | 1972-02-22 | 1975-07-16 | Putzmeister Interholding Gmbh | Apparatus for damping the pressure increase of hydrostatic drives |
| JPS58174703A (en) * | 1982-04-03 | 1983-10-13 | Kato Seisakusho:Kk | Speed control device for actuator |
| JPH06307407A (en) * | 1993-04-20 | 1994-11-01 | Furukawa Co Ltd | Valve block for hydraulic cylinder |
| JPH1121941A (en) * | 1997-07-01 | 1999-01-26 | Yutani Heavy Ind Ltd | Hydraulic controller for hydraulic backhoe |
| JP2001317504A (en) * | 2000-05-01 | 2001-11-16 | Shin Caterpillar Mitsubishi Ltd | Cylinder actuator control method and device |
| CN1836110A (en) * | 2003-08-20 | 2006-09-20 | 株式会社小松制作所 | Hydraulic drive control device |
| CN102562700A (en) * | 2012-01-20 | 2012-07-11 | 锦州市力特缸泵阀液压制造有限公司 | Combined-type multi-way reversing valve for coal-mine full-hydraulic underground drilling machine |
| CN203560194U (en) * | 2013-11-21 | 2014-04-23 | 无锡市蓝力机床有限公司 | Retreating type rapid oil discharging circuit of oil cylinder of hydraulic machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822628A (en) * | 2016-04-27 | 2016-08-03 | 安徽合力股份有限公司 | Pneumatic oil discharge system of hydraulic oil cylinder |
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|---|---|
| CN103557197B (en) | 2015-11-11 |
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Address after: 214174 Jiangsu province Wuxi city Huishan District Yanqiao Jade Weir Road No. 98 Patentee after: Wuxi blue force Intelligent Equipment Co., Ltd. Address before: 214174 Jiangsu province Wuxi city Huishan District Yanqiao Jade Weir Road No. 98 Patentee before: Wuxi Lanli Machine Tool Co., Ltd. |