CN102287418B - Hydraulic cylinder control device capable of realizing accurate half-way stoppage - Google Patents
Hydraulic cylinder control device capable of realizing accurate half-way stoppage Download PDFInfo
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- CN102287418B CN102287418B CN201110171827.5A CN201110171827A CN102287418B CN 102287418 B CN102287418 B CN 102287418B CN 201110171827 A CN201110171827 A CN 201110171827A CN 102287418 B CN102287418 B CN 102287418B
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Abstract
The invention relates to a hydraulic cylinder control device capable of realizing accurate half-way stoppage, belonging to the technical field of a hydraulic machine. The hydraulic cylinder control device comprises a multi-port hydraulic cylinder (1), a main electromagnetic reversing valve (2), a branch electromagnetic reversing valve (3), a hydraulic pipeline (4) and a plurality of proximity switches (5), and is characterized in that the hydraulic cylinder (1) is provided with 3-7 ports, each port is connected with the branch electromagnetic reversing valve (3) through the hydraulic pipeline (4) and is then connected with the main reversing valve (2), the branch electromagnetic reversing valve (3) is used for controlling connection and disconnection of each port,, the main electromagnetic reversing valve (2) is used for controlling the movement direction of the cylinder, and the proximity switches (5) are arranged at each stop position of the hydraulic cylinder. The invention has the advantages that: accurate stoppage can be achieved during operation, the influence of the performance of a hydraulic system and an electric control system can be avoided, the hydraulic cylinder control device can be used in important working situations and poor working environments and can operate reliably, and the accident rate can be reduced.
Description
Technical field
The invention belongs to the hydraulic machinery technical field, provide and be to provide a kind of accurately oil hydraulic cylinder of off-position control device of realizing midway, the executive component of mechanical-electrical-hydraulic integration (oil hydraulic cylinder), be applied to stop three above positions the also machinery of stable position, be particularly suitable for the occasion of multi-cylinder interlock under these conditions.All use the field of Driven by Hydraulic Cylinder can be widely used in mine, metallurgy, machinery, chemical industry, engineering, logistics etc.
Background technique
In current hydraulic driving system, when the needs oil hydraulic cylinder stops halfway, generally in corresponding position, position limit switch (or approach switch) is set, after switch detects signal, by PLC, control the solenoid valve commutation, make the oil hydraulic cylinder stop motion.Positioning precision can be subject to the impact of the fluctuations such as hydraulic fluid temperature, pressure, switch performance.The high occasion for precision prescribed, can also adopt magnetic scale or Linear displacement transducer etc.But all easily because the performance shakiness of electric elements causes fault, cause user cost higher with upper type.
Occasion in multi-cylinder interlock generally arranges throttle valve on two in-lines of each oil hydraulic cylinder, and the flow by modulating valve makes the speed of each cylinder roughly the same, thereby the position that each cylinder is stopped is roughly accurate.But because the characteristic of oil hydraulic cylinder and throttle valve in use can change, so, must regularly to valve, be adjusted, to maintain the normal use of equipment, but be difficult to the generation of stopping accident fully.
Summary of the invention
The present invention aims to provide and a kind ofly can realize that midway accurately the oil hydraulic cylinder of off-position is controlled device, overcomes the impact of the performance variation of the velocity variations of cylinder or Detecting element on stop position fully.
The present invention includes oil hydraulic cylinder 1 (for hydraulic cylinder with multiple fluid ports), 3-position 4-way master solenoid directional control valve 2, bi-bit bi-pass and prop up solenoid directional control valve 3, hydraulic pipe line 4 and approach switch 5, oil hydraulic cylinder 1 has 3～7 hydraulic fluid ports, each hydraulic fluid port props up solenoid directional control valve 3 by hydraulic pipe line 4 and bi-bit bi-pass and is connected, then with 3-position 4-way master solenoid directional control valve 2, be connected, bi-bit bi-pass props up the break-make that solenoid directional control valve 3 is controlled each hydraulic fluid port, the moving direction of 3-position 4-way master solenoid directional control valve 2 control cylinders, approach switch 5 is arranged on each stop position of oil hydraulic cylinder.
Oil hydraulic cylinder 1 of the present invention comprises cylinder body, piston, piston rod, on cylinder body except two hydraulic fluid ports at two ends, correspondingly with the position that need to stop at middle part be designed with 1～5 hydraulic fluid port, piston has the twice oil sealing, and twice oil sealing spacing just seals the middle part hydraulic fluid port.
Generally, the pipeline that oil hydraulic cylinder 1 middle part hydraulic fluid port picks out is converged into by two-way near the valve platform, props up by 1 bi-bit bi-pass two output oil ports that solenoid directional control valve 3 is connected to 3-position 4-way master solenoid directional control valve 2 respectively; The hydraulic fluid port pipeline at oil hydraulic cylinder two ends also props up by a bi-bit bi-pass two output oil ports that solenoid directional control valve 3 is connected to 3-position 4-way master solenoid directional control valve 2 separately.
Described approach switch 5 is arranged on oil hydraulic cylinder, corresponding with each stop position of piston of designing requirement, for judging the position at piston place.
When only having a middle hydraulic fluid port, by prop up solenoid directional control valve 6 with two two-position three ways, replace four bi-bit bi-pass to prop up the break-make selection that solenoid directional control valve 3 is controlled respectively middle hydraulic fluid port and two ends hydraulic fluid port, realize the accurate off-position in neutral position.
When multi-cylinder links, the mode that each oil hydraulic cylinder 1 adopts parallel connection, realize that by each corresponding hydraulic fluid port is linked togather each oil hydraulic cylinder is at the accurate off-position in identical position.
The present invention has the following advantages:
1. can realize the accurate off-position midway at stroke, not be subject to the impact of hydraulic system and automatical control system performance.Can be for important workplace and severe working environment, reliable operation, reduce accident rate.
2. the occasion linked at multi-cylinder, because each cylinder can be realized accurate off-position midway, for them, in the synchronous requirement aspect speed, will relax, even after work a period of time, variation has all occurred in the speed of each cylinder, but, as long as do not reach the degree that affects work rhythm, still can normally use.Like this, both reduce workman's labor intensity, improved again the working life of equipment, greatly reduced the working service cost.
3. with using expensive Linear displacement transducer, syncmotor etc., compare, the design can save equipment purchasing cost and user cost.
The accompanying drawing explanation
The control principle drawing that Fig. 1 is single four hydraulic fluid port oil hydraulic cylinders.Prop up solenoid directional control valve 3,1 cover hydraulic pipe line 4 and 4 approach switchs 5 form by 2,6 bi-bit bi-pass of 1,1 3-position 4-way master solenoid directional control valve of 1 oil hydraulic cylinder.
The control principle drawing that Fig. 2 is single three hydraulic fluid port oil hydraulic cylinders.Prop up solenoid directional control valve 6,1 cover hydraulic pipe line 4 and 3 approach switchs 5 form by 2,2 two-position three ways of 1,1 3-position 4-way master solenoid directional control valve of 1 oil hydraulic cylinder.
The control principle drawing that Fig. 3 is 3 three hydraulic fluid port oil hydraulic cylinders.Prop up solenoid directional control valve 6,1 cover hydraulic pipe line 4 and 3 approach switchs 5 form by 2,2 two-position three ways of 1,1 3-position 4-way master solenoid directional control valve of 3 (can be more) oil hydraulic cylinders.
Specific embodiment
The present invention includes oil hydraulic cylinder 1 (for hydraulic cylinder with multiple fluid ports), 3-position 4-way master solenoid directional control valve 2, bi-bit bi-pass and prop up solenoid directional control valve 3, hydraulic pipe line 4 and approach switch 5, it is characterized in that, oil hydraulic cylinder 1 has 3～7 hydraulic fluid ports, each hydraulic fluid port props up solenoid directional control valve 3 by hydraulic pipe line 4 and bi-bit bi-pass and is connected, then with 3-position 4-way master solenoid directional control valve 2, be connected, bi-bit bi-pass props up the break-make that solenoid directional control valve 3 is controlled each hydraulic fluid port, the moving direction of 3-position 4-way master solenoid directional control valve 2 control cylinders, approach switch 5 is arranged on each stop position of oil hydraulic cylinder.
The difference of oil hydraulic cylinder of the present invention and general oil hydraulic cylinder is, general oil hydraulic cylinder only has two hydraulic fluid ports, an oil-feed, an oil extraction, and oil hydraulic cylinder 1 of the present invention has 3～7 hydraulic fluid ports, the hydraulic fluid port position that middle part has more is corresponding with the position that needs Halfway Stopping of equipment requirement, and piston has the twice oil sealing, and its spacing can just cover the middle part hydraulic fluid port.The pipeline that the middle part hydraulic fluid port picks out is converged into by two-way near the valve platform, props up by a bi-bit bi-pass two output oil ports that solenoid directional control valve 3 is connected to 3-position 4-way master solenoid directional control valve 2 respectively.Also be provided with separately bi-bit bi-pass on the hydraulic fluid port pipeline at oil hydraulic cylinder 1 two ends and prop up solenoid directional control valve 3.The quantity that bi-bit bi-pass props up solenoid directional control valve 3 determines by the quantity of oil hydraulic cylinder middle part hydraulic fluid port, and the quantity of establishing oil hydraulic cylinder 1 middle part hydraulic fluid port is n, and to prop up the quantity of solenoid directional control valve 3 be 2n+2 to bi-bit bi-pass.Approach switch 5 is arranged on oil hydraulic cylinder, corresponding with each stop position of piston of designing requirement, for judging the position at piston place.Approach switch all is connected with PLC with solenoid valve.
Working principle is as follows: as shown in Figure 1, when the piston of oil hydraulic cylinder 1 during in retracted position, intermediate duct and the bi-bit bi-pass on the rod chamber pipeline that order is connected with rodless cavity prop up solenoid directional control valve 3 in closed condition, and the bi-bit bi-pass on the intermediate duct be connected with rod chamber and rodless cavity pipeline props up solenoid directional control valve 3 on state.When oil hydraulic cylinder advances, rodless cavity oil-feed, intermediate duct oil return.When going to neutral position, oil outlet in the middle of piston itself seals, oil hydraulic cylinder stops automatically.Return stroke is similar.
When oil hydraulic cylinder 1 piston is positioned at neutral position, make solenoid directional control valve 3 on two intermediate duct all in closed condition, the bi-bit bi-pass on the pipeline of two ends props up solenoid directional control valve 3 on state.Oil hydraulic cylinder advances or while retreating, oil-feed of two ends hydraulic fluid port, an oil return.When going to limit position, oil hydraulic cylinder stops automatically.
Described hydraulic cylinder with multiple fluid ports comprises cylinder body, piston, piston rod, on cylinder body, except two hydraulic fluid ports at two ends, correspondingly with the position that need to stop at middle part also is designed with 1～5 hydraulic fluid port.
The Fig. 1 of take is elaborated as example: as shown in Figure 1, when the piston of oil hydraulic cylinder 1, during in retracted position, the S0 of approach switch 5 has signal in place, and 6 bi-bit bi-pass prop up B1 in solenoid directional control valve 3 and B3 on state, and all the other 4 in closed condition.During oil hydraulic cylinder 1 piston-advance, 2 actions of 3-position 4-way master solenoid directional control valve, rodless cavity oil-feed, the first intermediate duct oil return.When going to the first neutral position, piston itself seals the first middle oil outlet, and oil hydraulic cylinder stops automatically, and signal in place appears in the S2 of approach switch 5.When oil hydraulic cylinder 1 need to move on, 6 bi-bit bi-pass prop up B1 in solenoid directional control valve 3 and B5 on state, and all the other 4 in closed condition.The rodless cavity oil-feed, the second intermediate duct oil return.When going to the second neutral position, piston itself seals the second middle oil outlet, and oil hydraulic cylinder stops automatically, and signal in place appears in the S3 of approach switch 5.When oil hydraulic cylinder 1 need to move on, 6 bi-bit bi-pass prop up B1 in solenoid directional control valve 3 and B6 on state, and all the other 4 in closed condition.The rodless cavity oil-feed, the rod chamber oil return.When going to while stretching out limit position, oil hydraulic cylinder stops automatically, and signal in place appears in the Sl of approach switch 5.Return stroke is similar, and the piston of oil hydraulic cylinder 1 is in stretching out limit position, and the S1 of approach switch 5 has signal in place, and 6 bi-bit bi-pass prop up B4 in solenoid directional control valve 3 and B6 on state, and all the other 4 in closed condition.When oil hydraulic cylinder 1 piston retreats, 2 actions of 3-position 4-way master solenoid directional control valve, rod chamber oil-feed, the second intermediate duct oil return.When going to the second neutral position, piston itself seals the second middle oil outlet, and oil hydraulic cylinder stops automatically, and signal in place appears in the S3 of approach switch 5.When oil hydraulic cylinder 1 need to continue to retreat, 6 bi-bit bi-pass prop up B2 in solenoid directional control valve 3 and B6 on state, and all the other 4 in closed condition.The rod chamber oil-feed, the first intermediate duct oil return.When going to the first neutral position, piston itself seals the first middle oil outlet, and oil hydraulic cylinder stops automatically, and signal in place appears in the S2 of approach switch 5.When oil hydraulic cylinder 1 need to continue to retreat, 6 bi-bit bi-pass prop up B1 in solenoid directional control valve 3 and B6 on state, and all the other 4 in closed condition.The rod chamber oil-feed, the rodless cavity oil return.When going to retracted position, oil hydraulic cylinder stops automatically, and signal in place appears in the S0 of approach switch 5.。
As shown in Figure 2, when only having a middle hydraulic fluid port, prop up solenoid directional control valve 6 with two two-position three ways and replace four two-position three ways to prop up the break-make selection that solenoid directional control valve 3 is controlled respectively middle hydraulic fluid port and two ends hydraulic fluid port, just can realize.
As shown in Figure 3, in the occasion of multi-cylinder interlock, each oil hydraulic cylinder adopts the mode of parallel connection, and each corresponding hydraulic fluid port is linked togather and gets final product.
Claims (4)
1. can realize that midway accurately the oil hydraulic cylinder of off-position is controlled device for one kind, comprise that oil hydraulic cylinder (1), 3-position 4-way master solenoid directional control valve (2), bi-bit bi-pass prop up solenoid directional control valve (3), hydraulic pipe line (4), approach switch (5); It is characterized in that, oil hydraulic cylinder (1) has 3～7 hydraulic fluid ports, each hydraulic fluid port props up solenoid directional control valve (3) by hydraulic pipe line (4) and bi-bit bi-pass and is connected, then with 3-position 4-way master solenoid directional control valve (2), be connected, bi-bit bi-pass props up the break-make that solenoid directional control valve (3) is controlled each hydraulic fluid port, the moving direction of 3-position 4-way master solenoid directional control valve (2) control cylinder, approach switch (5) is arranged on each stop position of oil hydraulic cylinder;
Described oil hydraulic cylinder (1) comprises cylinder body, piston, piston rod, on cylinder body except two hydraulic fluid ports at two ends, correspondingly with the position that need to stop at middle part be designed with 1～5 hydraulic fluid port, piston has the twice oil sealing, and twice oil sealing spacing just seals the middle part hydraulic fluid port;
Described approach switch (5) is corresponding with each stop position of piston of designing requirement, for judging the position at piston place.
2. oil hydraulic cylinder as claimed in claim 1 is controlled device, it is characterized in that, the pipeline that oil hydraulic cylinder (1) middle part hydraulic fluid port picks out is converged into by two-way near the valve platform, props up by 1 bi-bit bi-pass two output oil ports that solenoid directional control valve (3) is connected to 3-position 4-way master solenoid directional control valve (2) respectively; The hydraulic fluid port pipeline at oil hydraulic cylinder two ends also props up by a bi-bit bi-pass two output oil ports that solenoid directional control valve (3) is connected to 3-position 4-way master solenoid directional control valve (2) separately.
3. oil hydraulic cylinder as claimed in claim 1 is controlled device, when only having a middle hydraulic fluid port, by prop up solenoid directional control valve (6) with two two-position three ways, replace four bi-bit bi-pass to prop up the break-make selection that solenoid directional control valve (3) is controlled respectively middle hydraulic fluid port and two ends hydraulic fluid port, realize the accurate off-position in neutral position.
4. oil hydraulic cylinder as claimed in claim 1 is controlled device, and when multi-cylinder links, the mode that each oil hydraulic cylinder (1) adopts parallel connection, realize that by each corresponding hydraulic fluid port is linked togather each oil hydraulic cylinder is at the accurate off-position in identical position.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110171827.5A CN102287418B (en) | 2011-06-24 | 2011-06-24 | Hydraulic cylinder control device capable of realizing accurate half-way stoppage |
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| CN201110171827.5A CN102287418B (en) | 2011-06-24 | 2011-06-24 | Hydraulic cylinder control device capable of realizing accurate half-way stoppage |
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| CN102287418B true CN102287418B (en) | 2014-01-01 |
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| CN103059879A (en) * | 2012-10-17 | 2013-04-24 | 南京梅山冶金发展有限公司 | Control method for middle position of coking coal stroke of hydraulic pressure exchanger |
| CN108035926B (en) * | 2017-12-13 | 2019-07-02 | 安徽天水液压机床科技有限公司 | A kind of application method of multi-cylinder linkage hydraulic system of hydraulic machine |
| CN108788454A (en) * | 2018-08-21 | 2018-11-13 | 佛山市宏石激光技术有限公司 | A kind of single hydraulic cylinder lifting board |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2665696Y (en) * | 2003-11-25 | 2004-12-22 | 肖勇 | Crude oil sampler |
| CN101749301A (en) * | 2008-12-18 | 2010-06-23 | 中集车辆（集团）有限公司 | Hydraulic cylinder device and hydraulic cylinder behavior control system with same |
| CN201529667U (en) * | 2009-11-02 | 2010-07-21 | 秦皇岛首秦金属材料有限公司 | Rolling mill water tank lifting alarm device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040103780A1 (en) * | 2002-12-02 | 2004-06-03 | Shteynberg Mark Y. | Hydropneumatic hybrid cylinder with tandem pistons and dampening hydraulic chambers disposed between them |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2665696Y (en) * | 2003-11-25 | 2004-12-22 | 肖勇 | Crude oil sampler |
| CN101749301A (en) * | 2008-12-18 | 2010-06-23 | 中集车辆（集团）有限公司 | Hydraulic cylinder device and hydraulic cylinder behavior control system with same |
| CN201529667U (en) * | 2009-11-02 | 2010-07-21 | 秦皇岛首秦金属材料有限公司 | Rolling mill water tank lifting alarm device |
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