CN202789805U - Hydraulic control device of electro-hydraulic feedback proportional throttling cartridge valve - Google Patents
Hydraulic control device of electro-hydraulic feedback proportional throttling cartridge valve Download PDFInfo
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- CN202789805U CN202789805U CN201220415382.0U CN201220415382U CN202789805U CN 202789805 U CN202789805 U CN 202789805U CN 201220415382 U CN201220415382 U CN 201220415382U CN 202789805 U CN202789805 U CN 202789805U
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Abstract
The utility model relates to a hydraulic control device of an electro-hydraulic feedback proportional throttling cartridge valve, in particular to a hydraulic control device for proportionally controlling the flow by a large flow pilot valve in engineering machinery. The device is in such a structure that an oil inlet and an oil outlet of a main valve are respectively arranged on the side face of a main valve sleeve, one end of a throttling groove of the main valve is communicated with a number 2 one-way valve while the other end of the throttling groove of the main valve is communicated with a cavity of the main valve, a displacement feedback rod of a control cover plate axial device and a displacement sensor. A pilot valve core is arranged in an axial hole of the pilot valve body, and a pivot spring is arranged between the pilot valve cover and a blind nut. A control oil opening is communicated with a number 1 one-way valve which is communicated with the cavity of the main valve. The control oil opening is communicated with a working oil opening of the pilot valve, the oil inlet of the pilot valve is communicated with the cavity of the main valve, and the pilot oil turn opening is communicated with one end of the pilot valve core. The hydraulic control device of the electro-hydraulic feedback proportional throttling cartridge valve has the effect of simple structure, convenience in operation, instantaneous start, proportional control, electro-hydraulic closed loop feedback control, high linearity, and online detection of position of the main valve core, and can be widely applied to the hydraulic control system in the engineering machinery industry.
Description
Technical field
The utility model relates to the hydraulic control device equipment of large-flow-rate pilot valve proportional control flow in a kind of electric liquid feedback ratio the throttle cartridge valve hydraulic control device, particularly engineering machinery.
Background technique
At present, what used throttle valve adopted mostly in the hydraulic machinery is Manual structure, can not adopt computer control, the computer-controlled proportional throttle valve of employing is also arranged, but complex structure, control mode is to adopt two ACTIVE CONTROL, the guide who controls this valve partly is servovalve, although control accuracy is high, cost is also higher, can not adapt to most of occasions, and can not reliably close during the fluid reverse flow, affect the hydraulic system trouble free service, and complex structure, external form is bulky, it is larger to take up room, and the control section complex structure is high to the turbidity test requirement of fluid, cause rate of fault high, maintenance is inconvenient.
Summary of the invention
The purpose of this utility model provides a kind of electric liquid feedback ratio throttle cartridge valve hydraulic control device, and it is that pilot stage adopts hydraulic pilot valve control, and main adopts the cartridge valve mode of structure; Be provided with the dynamic hydraulic damping between pilot stage and the main, main valve plug is provided with displacement transducer, the position feedback of displacement transducer feedback main valve is to amplifier, carry out closed loop control, reach the spool ratio and open, response rapidly, oppositely closed safe is reliable, the linearity is high, and the ring that stagnates is little, and realization spool ratio is opened the purpose that hydraulic control is oppositely closed rapidly in response.
The utility model electric liquid feedback ratio throttle cartridge valve hydraulic control device takes following technological scheme to realize: it is by the main valve filler opening, main valve housing, the main valve oil outlet, main valve plug, the main valve throttling groove, the main valve cavity volume, guide's return opening, blind nut, guide's spring, guide's spool, guide valve blocks, amplifier, proportion electro-magnet, displacement transducer, the Displacement Feedback bar, the pilot valve filler opening, the control cover plate, the number one one-way valve, the pilot valve actuator port, control port, No. second one-way valve and cross throttling groove consist of, the side of main valve housing arranges respectively main valve filler opening and main valve oil outlet, device main valve plug in the axial bore of main valve housing, one-way valve is set in the main valve plug axial bore No. second, main valve plug one end arranges cross throttling groove, the main valve plug the other end arranges the main valve throttling groove, main valve throttling groove one end is communicated with No. second one-way valve, the main valve throttling groove the other end is communicated with the main valve cavity volume, the control cover board arrangement is in the main valve housing upper end, control cover plate axial device Displacement Feedback bar and displacement transducer, Displacement Feedback bar one end connects main valve plug, the Displacement Feedback bar the other end is nested with in the displacement transducer axial bore, control cover plate side arranges guide valve blocks, device pilot valve core in the guide valve blocks axial bore, guide's spool one end device blind nut, device guide spring between guide's spool and the blind nut, guide's spool the other end device proportion electro-magnet, the proportion electro-magnet side arranges amplifier, control cover plate both sides arrange respectively control port and guide's return opening, control port is communicated with the number one one-way valve, the number one one-way valve is communicated with the main valve cavity volume, control port is communicated with the pilot valve actuator port, the pilot valve filler opening is communicated with the main valve cavity volume, guide's return opening is communicated with guide's spool one end, realizes the effect of the hydraulic control of electric liquid feedback ratio throttle cartridge valve in the large-flow-rate pilot valve proportional control flow.
Working procedure of the present utility model is as follows: when amplifier does not have signal, the proportion electro-magnet attonity, guide's spool is in closed condition, pressure oil enters the main valve throttling groove through No. second one-way valve, pressure oil enters the main valve cavity volume by the main valve throttling groove, pressure oil enters the number one one-way valve, this moment, the number one one-way valve was closed condition, pressure oil enters guide's spool simultaneously, because guide's spool is closed condition, so pressure oil enters to produce behind the main valve cavity volume and pressed, because the area of guide's cavity volume is greater than the area of main valve filler opening, so main valve plug is in closed condition.When amplifier has certain signal, proportion electro-magnet produces certain thrust promotion guide spool and moves, overcome the power of guide's spring, guide's spool moves certain distance, the pilot valve filler opening is opened certain opening to the path of pilot valve actuator port, pressure oil in the main valve cavity volume enters control port by this opening, release a part of pressure of main valve cavity volume, when the pressure in the main valve cavity volume little to a certain degree the time, main valve plug is just opened certain distance, this moment, the opening of main valve throttling groove also and then became large, until the flow that the flow that the main valve throttling groove passes through and guide's spool pass through is when suitable, main valve plug just is in state of equilibrium, the displacement amount of main valve plug can feed back to amplifier through displacement transducer, amplifier can carry out infinitesimal calculus relatively to this signal and instruction signal, carries out closed loop control, realizes ratio throttling control flow.When electrical signal reduces to suddenly zero, and when the pressure of main valve oil outlet was high, the pressure oil of main valve oil outlet entered the main valve cavity volume by the number one one-way valve, and the pressure of main valve cavity volume raises, so that main valve plug is closed rapidly, the like this safe operation of assurance equipment reaches the spool ratio and opens, and response rapidly, closed safe is reliable, the linearity is high, and the ring that stagnates is little, realizes the effect of hydraulic control in the large-flow-rate pilot valve proportional control flow.
The effect of the utility model electric liquid feedback ratio throttle cartridge valve hydraulic control device is simple in structure, easy to operate, instantaneous unlatching, proportional control, the spool realization is safe and reliable closes and opens, adopt electric liquid closed-loop feedback control, the linearity is high, and the ring that stagnates is little, and control degree and reliability are high, detect online the position of main valve plug, be widely used in the hydraulic control device equipment of construction machinery industry.
Description of drawings
The utility model electric liquid feedback ratio throttle cartridge valve hydraulic control device will be described in further detail with reference to Figs..
Fig. 1 is the structural representation of the utility model electric liquid feedback ratio throttle cartridge valve hydraulic control device.
Fig. 2 is the hydraulic control system structural representation of the utility model electric liquid feedback ratio throttle cartridge valve hydraulic control device.
1-main valve oil-in, 2-main valve housing, 3-main valve oil-out, 4-main valve plug, 5-main valve throttling channel, 6-main valve cavity volume, 7-guide oil return opening, 8-blind nut, 9-guide spring, 10-guide spool, 11-guide valve blocks, 12-amplifier, 13-proportion electro-magnet, 14-displacement transducer, 15-Displacement Feedback bar, 16-pilot valve oil-in 17-21-No. the second check valve of control cover plate 18-number one check valve 19-pilot valve actuator port 20-control port, 22-cross throttling channel.
Embodiment
With reference to Fig. 1,2, the utility model electric liquid feedback ratio throttle cartridge valve hydraulic control device: it is by main valve filler opening 1, main valve housing 2, main valve oil outlet 3, main valve plug 4, main valve throttling groove 5, main valve cavity volume 6, guide's return opening 7, blind nut 8, guide's spring 9, guide's spool 10, guide valve blocks 11, amplifier 12, proportion electro-magnet 13, displacement transducer 14, Displacement Feedback bar 15, pilot valve filler opening 16, control cover plate 17, number one one-way valve 18, pilot valve actuator port 19, control port 20, No. second one-way valve 21 and cross throttling groove 22 consist of, the side of main valve housing 2 arranges respectively main valve filler opening 1 and main valve oil outlet 3, device main valve plug 4 in the axial bore of main valve housing 2, one-way valve 21 is set No. second in main valve plug 4 axial bores, main valve plug 4 one ends arrange cross throttling groove 22, main valve plug 4 the other ends arrange main valve throttling groove 5, main valve throttling groove 5 one ends are communicated with No. second one-way valve 21, main valve throttling groove 5 the other ends are communicated with main valve cavity volume 6, control cover plate 17 devices are in main valve housing 2 upper ends, control cover plate 17 axial device Displacement Feedback bar 15 and displacement transducers 14, Displacement Feedback bar 15 1 ends connect main valve plug 4, Displacement Feedback bar 15 the other ends are nested with in displacement transducer 14 axial bores, control cover plate 17 sides arrange guide valve blocks 11, device pilot valve core 10 in guide valve blocks 11 axial bores, guide's spool 10 1 end device blind nuts 8, device guide spring 9 between guide's spool 10 and the blind nut 8, guide's spool 10 the other end device proportion electro-magnets 13, proportion electro-magnet 13 sides arrange amplifier 12, control cover plate 17 both sides arrange respectively control port 20 and guide's return opening 7, control port 20 is communicated with number one one-way valve 18, number one one-way valve 18 is communicated with main valve cavity volume 6, control port 20 is communicated with pilot valve actuator port 19, pilot valve filler opening 16 is communicated with main valve cavity volume 6, guide's return opening 7 is communicated with guide's spool 10 1 ends, realizes the effect of the hydraulic control of electric liquid feedback ratio throttle cartridge valve in the large-flow-rate pilot valve proportional control flow.
The embodiment of the utility model electric liquid feedback ratio throttle cartridge valve hydraulic control device, working procedure of the present utility model is as follows: when amplifier 12 does not have signal, proportion electro-magnet 13 attonitys, guide's spool 10 is in closed condition, pressure oil enters main valve throttling groove 5 through No. second one-way valve 21, pressure oil enters main valve cavity volume 6 by main valve throttling groove 5, pressure oil enters number one one-way valve 18, number one one-way valve 18 is closed conditions at this moment, pressure oil enters guide's spool 10 simultaneously, because guide's spool 10 is closed conditions, so pressure oil enters the 6 rear generations of main valve cavity volume and is pressed, because the area of guide's cavity volume 6 is greater than the area of main valve filler opening 1, so main valve plug 4 is in closed condition.When amplifier 12 has certain signal, proportion electro-magnet 13 produces certain thrust promotion guide spool 10 and moves, overcome the power of guide's spring 9, guide's spool 10 moves certain distance, pilot valve filler opening 16 is opened certain opening to the path of pilot valve actuator port 19, pressure oil in the main valve cavity volume 6 enters control port 20 by this opening, release a part of pressure of main valve cavity volume 6, when the pressure in the main valve cavity volume 6 little to a certain degree the time, main valve plug 4 is just opened certain distance, the opening of main valve throttling groove 5 also and then becomes large at this moment, until the flow that the flow that main valve throttling groove 5 passes through and guide's spool 10 pass through is when suitable, main valve plug 4 just is in state of equilibrium, the displacement amount of main valve plug 4 can feed back to amplifier 13 through displacement transducer 14, amplifier 13 can carry out infinitesimal calculus relatively to this signal and instruction signal, carries out closed loop control, realizes ratio throttling control flow.When electrical signal reduces to suddenly zero, and when the pressure of main valve oil outlet 3 was high, the pressure oil of main valve oil outlet 3 entered main valve cavity volume 6 by number one one-way valve 18, and the pressure of main valve cavity volume 6 raises, so that main valve plug 4 is closed rapidly, the like this safe operation of assurance equipment reaches the spool ratio and opens, and response rapidly, closed safe is reliable, the linearity is high, and the ring that stagnates is little, realizes the effect of hydraulic control in the large-flow-rate pilot valve proportional control flow.
Claims (1)
1. electric liquid feedback ratio throttle cartridge valve hydraulic control device, it is by main valve filler opening (1), main valve housing (2), main valve oil outlet (3), main valve plug (4), main valve throttling groove (5), main valve cavity volume (6), guide's return opening (7), blind nut (8), guide's spring (9), guide's spool (10), guide valve blocks (11), amplifier (12), proportion electro-magnet (13), displacement transducer (14), Displacement Feedback bar (15), pilot valve filler opening (16), control cover plate (17), number one one-way valve (18), pilot valve actuator port (19), control port (20), No. second one-way valve (21) and cross throttling groove (22) consist of, the side that it is characterized in that main valve housing (2) arranges respectively main valve filler opening (1) and main valve oil outlet (3), device main valve plug (4) in the axial bore of main valve housing (2), in main valve plug (4) axial bore No. second one-way valve (21) is set, main valve plug (4) one ends arrange cross throttling groove (22), main valve plug (4) the other end arranges main valve throttling groove (5), main valve throttling groove (5) one ends are communicated with No. second one-way valve (21), main valve throttling groove (5) the other end is communicated with main valve cavity volume (6), control cover plate (17) device is in main valve housing (2) upper end, control cover plate (17) axial device Displacement Feedback bar (15) and displacement transducer (14), Displacement Feedback bar (15) one ends connect main valve plug (4), Displacement Feedback bar (15) the other end is nested with in displacement transducer (14) axial bore, control cover plate (17) side arranges guide valve blocks (11), device pilot valve core (10) in guide valve blocks (11) axial bore, guide's spool (10) one end device blind nuts (8), device guide's spring (9) between guide's spool (10) and the blind nut (8), guide's spool (10) the other end device proportion electro-magnet (13), proportion electro-magnet (13) side arranges amplifier (12), control cover plate (17) both sides arrange respectively control port (20) and guide's return opening (7), control port (20) is communicated with number one one-way valve (18), number one one-way valve (18) is communicated with main valve cavity volume (6), control port (20) is communicated with pilot valve actuator port (19), pilot valve filler opening (16) is communicated with main valve cavity volume (6), guide's return opening (7) is communicated with guide's spool (10) one ends, realizes the hydraulic control of electric liquid feedback ratio throttle cartridge valve in the large-flow-rate pilot valve proportional control flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220415382.0U CN202789805U (en) | 2012-08-21 | 2012-08-21 | Hydraulic control device of electro-hydraulic feedback proportional throttling cartridge valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220415382.0U CN202789805U (en) | 2012-08-21 | 2012-08-21 | Hydraulic control device of electro-hydraulic feedback proportional throttling cartridge valve |
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|---|---|
| CN202789805U true CN202789805U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220415382.0U Expired - Lifetime CN202789805U (en) | 2012-08-21 | 2012-08-21 | Hydraulic control device of electro-hydraulic feedback proportional throttling cartridge valve |
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| CN (1) | CN202789805U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788056A (en) * | 2012-08-21 | 2012-11-21 | 山东泰丰液压股份有限公司 | Hydraulic control system of electro-hydraulic feedback proportion throttle cartridge valve |
| CN104033438A (en) * | 2014-06-09 | 2014-09-10 | 烟台宝钢钢管有限责任公司 | Multi-functional hydraulic-jamming preventing pilot valve for electro-hydraulic directional valve |
| CN105003477A (en) * | 2015-06-19 | 2015-10-28 | 太原理工大学 | Motor cooperative control pilot-operated electro-hydraulic valve |
| CN105570222A (en) * | 2016-02-17 | 2016-05-11 | 武汉市航天汉诺优科技有限公司 | Numerical-control spinning-core type proportional cartridge valve |
| CN106855070A (en) * | 2016-12-19 | 2017-06-16 | 武汉船用机械有限责任公司 | A kind of proportional flow inserted valve and its control method |
| CN108757621A (en) * | 2018-08-14 | 2018-11-06 | 三河沃达液压控制系统有限公司 | Indirect control formula digital servo valve |
| CN115839357A (en) * | 2023-02-10 | 2023-03-24 | 青岛力克川液压机械有限公司 | Delay brake control valve for hydraulic rotary motor |
-
2012
- 2012-08-21 CN CN201220415382.0U patent/CN202789805U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788056A (en) * | 2012-08-21 | 2012-11-21 | 山东泰丰液压股份有限公司 | Hydraulic control system of electro-hydraulic feedback proportion throttle cartridge valve |
| CN104033438A (en) * | 2014-06-09 | 2014-09-10 | 烟台宝钢钢管有限责任公司 | Multi-functional hydraulic-jamming preventing pilot valve for electro-hydraulic directional valve |
| CN105003477A (en) * | 2015-06-19 | 2015-10-28 | 太原理工大学 | Motor cooperative control pilot-operated electro-hydraulic valve |
| CN105570222A (en) * | 2016-02-17 | 2016-05-11 | 武汉市航天汉诺优科技有限公司 | Numerical-control spinning-core type proportional cartridge valve |
| CN105570222B (en) * | 2016-02-17 | 2017-09-22 | 武汉市汉诺优电控有限责任公司 | Core type proportional cartridge valve is revolved in a kind of numerical control |
| CN106855070A (en) * | 2016-12-19 | 2017-06-16 | 武汉船用机械有限责任公司 | A kind of proportional flow inserted valve and its control method |
| CN106855070B (en) * | 2016-12-19 | 2018-07-31 | 武汉船用机械有限责任公司 | A kind of proportional flow inserted valve and its control method |
| CN108757621A (en) * | 2018-08-14 | 2018-11-06 | 三河沃达液压控制系统有限公司 | Indirect control formula digital servo valve |
| CN115839357A (en) * | 2023-02-10 | 2023-03-24 | 青岛力克川液压机械有限公司 | Delay brake control valve for hydraulic rotary motor |
| CN115839357B (en) * | 2023-02-10 | 2024-01-12 | 青岛力克川液压机械有限公司 | Delay brake control valve for hydraulic rotary motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 272000 Shandong city of Jining province high tech Zone Haichuan Road No. 66 Patentee after: SHANDONG TAIFENG INTELLIGENT CONTROL CO.,LTD. Address before: 272000 Shandong city of Jining province high tech Zone Haichuan Road No. 66 Patentee before: SHANDONG TAIFENG HYDRAULIC Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |