CN103982476B - A kind of hydraulic control circuit - Google Patents
A kind of hydraulic control circuit Download PDFInfo
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- CN103982476B CN103982476B CN201410227467.XA CN201410227467A CN103982476B CN 103982476 B CN103982476 B CN 103982476B CN 201410227467 A CN201410227467 A CN 201410227467A CN 103982476 B CN103982476 B CN 103982476B
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- valve
- selector valve
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- pipeline
- oil
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- 238000005516 engineering process Methods 0.000 claims abstract description 35
- 230000010363 phase shift Effects 0.000 claims abstract description 35
- 239000002828 fuel tank Substances 0.000 claims abstract description 27
- 238000006073 displacement reaction Methods 0.000 claims abstract description 15
- 239000003921 oil Substances 0.000 description 96
- 239000012530 fluid Substances 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a kind of hydraulic control circuit, comprise fuel tank, the first selector valve, the second selector valve, one-way valve, Pilot operated check valve, digital phase-shift technology and controller etc.; Oil cylinder comprises the first cavity and the second cavity; Fuel tank is communicated with oil pump, and oil pump is communicated with the first selector valve by the first pipeline; One-way valve and Pilot operated check valve are forward connected between the first selector valve and the first cavity of oil cylinder successively, first selector valve is communicated with the control mouth of Pilot operated check valve, one-way valve is communicated with Pilot operated check valve by the second pipeline, and the second pipeline is provided with digital phase-shift technology; Second cavity of oil cylinder is communicated with the second selector valve, the second selector valve and the second pipeline connection, the second selector valve and the first pipeline connection; Displacement detector is connected with the piston rod of oil cylinder; First selector valve, the second selector valve, digital phase-shift technology etc. are all connected with controller.Technical solution of the present invention is simplified, and can realize the adjustable and quick oil return of unloading rate, meet the demand of real operating mode, practical.
Description
Technical field
The present invention relates to hydraulic control system field, especially, relating to a kind of for regulating the hydraulic control circuit of unloading rate.
Background technique
In hydraulic system, often can need some functions, if do not needed oil hydraulic pump fuel feeding, need oil hydraulic cylinder or quit work in the oil hydraulic motor short time, or executive component can in the slack-off situation such as even not work of movement velocity in section sometime, we usually require oil hydraulic pump not export fluid or only need hydraulic oil that flow is less or carry out fast pressure relief, so most fluid that oil hydraulic pump exports flow back to fuel tank through relief valve, fluid can be caused like this to generate heat, increase the consumption of energy, but also the performance of hydraulic system and the working life of hydraulic element can be affected.
In prior art, this thing happens usually to adopt hydraulic unloading loop to avoid, and mainly contains following several mode:
Adopt selector valve off-load, when this kind of unloading way switches, compression shock is large, the one-way valve simultaneously needing placement one common in oil circuit, and easily produce impact phenomenon during valve commutation, practicability is not strong.
Adopt relief valve off-load, this kind of unloading way must form combination valve by a two position two-way valve in parallel in the loop, and the structure of relief valve is necessary for leading type structure simultaneously, only in this way arrange in pairs or groups, could realize oil hydraulic pump off-load, there is retardation phenomenon in this loop, and degree of accuracy is not high.
Adopt sequence valve off-load, this kind of unloading way mainly utilizes the height of oil circuit pressure to change the unlatching handling sequence valve, makes oil hydraulic pump by pilot sequencing valve off-load, controls precision require high to the change of working connection pressure, easily there is pilot sequencing valve misoperation, affect oil hydraulic pump off-load.
Therefore, design that a kind of structure is simplified, hydraulic control circuit that easy-to-operat and unloading rate can regulate is significant.
Summary of the invention
The hydraulic control circuit that the object of the invention is to provide that a kind of structure of knot is simplified, easy-to-operat and unloading rate can regulate, concrete technological scheme is as follows:
A kind of hydraulic control circuit, comprises fuel tank, the first selector valve, the second selector valve, one-way valve, Pilot operated check valve, digital phase-shift technology, oil cylinder, oil pump, displacement detector and controller;
Described oil cylinder comprises the first cavity and the second cavity, and described displacement detector is connected with the piston rod of described oil cylinder;
Described fuel tank is communicated with described oil pump, and described oil pump is communicated with the pressure oil port of described first selector valve by the first pipeline;
Described one-way valve and described Pilot operated check valve are forward connected between an actuator port of described first selector valve and the first cavity of described oil cylinder successively, another actuator port of described first selector valve is communicated with the control mouth of described Pilot operated check valve, described one-way valve is communicated with described Pilot operated check valve by the second pipeline, described digital phase-shift technology and described second pipeline connection; Second cavity of described oil cylinder is communicated with an actuator port of described second selector valve, another actuator port of described second selector valve and described second pipeline connection, the pressure oil port of described second selector valve and described first pipeline connection; Described second selector valve is J type two position and four-way reversing valve;
Described first selector valve, the second selector valve, digital phase-shift technology and displacement detector are all connected with described controller.
Preferred in above technological scheme, the pipeline between the actuator port of described first pipeline and described first selector valve and the control mouth of described Pilot operated check valve is equipped with relief valve.
Preferred in above technological scheme, described controller comprises PLC.
Preferred in above technological scheme, described first inside cavity is provided with pressure transducer, and described pressure transducer is connected with described controller.
Preferred in above technological scheme, described first pipeline is also provided with pressure gauge, and described pressure gauge is connected with described controller.
In order to reach better technique effect, be also provided with air filter, described air filter is connected with described fuel tank.
The present invention has following beneficial effect:
(1) hydraulic control circuit of the present invention comprises fuel tank, the first selector valve, the second selector valve, one-way valve, Pilot operated check valve, digital phase-shift technology, oil cylinder, oil pump, displacement detector and controller, and overall structure is simplified; The control to Pilot operated check valve is realized, the opening state of control break Pilot operated check valve by the combination of the first selector valve, Pilot operated check valve and controller, thus the flow direction changing pressure oil; By the combination of the first selector valve, Pilot operated check valve, one-way valve, digital phase-shift technology and controller, make oil cylinder when off-load, pressure oil can only flow back to fuel tank from digital phase-shift technology, but because digital phase-shift technology is in the working pressure of setting, pressure oil in oil cylinder cannot fast discharging, slowly can only regulate when step-down at digital phase-shift technology and slowly unload, the speed of unloading can be controlled by digital phase-shift technology, can realize the release speed needing employing different according to actual conditions; Making the pressure oil in oil cylinder without the need to directly flowing back to fuel tank through digital phase-shift technology by the commutation of the second selector valve, realizing quick oil return; Adopt controller to control, realize automation mechanized operation, increase work efficiency.
(2) in the present invention, the first pipeline is provided with relief valve, for limiting the maximum pressure of system when oil pump is opened; Pipeline between the actuator port of the first selector valve and the control mouth of Pilot operated check valve is provided with relief valve, for controlling the pressure opening Pilot operated check valve and restriction B chamber, improves the Security of integrated hydraulic control loop.
(3) middle controller of the present invention comprises PLC, by programming in PLC, realize the sequence of movement, actuation time etc. of the first selector valve in whole hydraulic control circuit, the second selector valve, digital phase-shift technology, pressure transducer and displacement detector, realize automatically controlling.
(4) in the present invention, the first inside cavity of oil cylinder is provided with pressure transducer, the pressure condition of monitoring oil cylinder rodless cavity inside; First pipeline is also provided with pressure gauge, is convenient to obtain the related pressure data on oil circuit, improves the safety of system.
(5) be also provided with air filter in the present invention, air filter is connected with fuel tank, filters the dust etc. in air, plays the effect of purification fluid, reduces harmful matter to the infringement of equipment each in hydraulic control circuit.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the overall structure schematic diagram of the hydraulic control circuit of the preferred embodiment of the present invention 1;
1-fuel tank, 2-first selector valve, 3-second selector valve, 4-one-way valve, 5-Pilot operated check valve, 6-digital phase-shift technology, 7-oil cylinder, 8-oil pump, 9-motor, 10-relief valve, 11-pressure transducer, 12-pressure gauge, 13-air filter.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can limit according to claim and cover is implemented.
Embodiment 1:
A kind of hydraulic control circuit, refer to Fig. 1, specifically comprise fuel tank 1, first selector valve 2, second selector valve 3, one-way valve 4, Pilot operated check valve 5, digital phase-shift technology 6, oil cylinder 7, oil pump 8, displacement detector (not shown) and controller (not shown), described second selector valve 3 is J type two position and four-way reversing valve, and overall structure is simplified.
Described oil cylinder 7 comprises the first cavity A and the second cavity B, piston rod is provided with in described oil cylinder 7, described first cavity A is rodless cavity, and described displacement detector is connected with the piston rod of described oil cylinder 7, for the collection of the situation of movement and Mobile data of monitoring piston rod.
Described fuel tank 1 is communicated with described oil pump 8, and described oil pump 8 is connected with motor 9, and motor 9 oil feed pump 8 provides power; Described oil pump 8 is communicated with the pressure oil port of described first selector valve 2 by the first pipeline 01.
Between the actuator port that described one-way valve 4 and described Pilot operated check valve 5 are forward connected on described first selector valve 2 successively and the first cavity A of described oil cylinder 7, another actuator port of described first selector valve 2 is communicated with the control mouth of described Pilot operated check valve 5, described one-way valve 4 is communicated with described Pilot operated check valve 5 by the second pipeline 02, and described digital phase-shift technology 6 is communicated with described second pipeline 02; Second cavity B of described oil cylinder 7 is communicated with an actuator port of described second selector valve 3, and another actuator port of described second selector valve 3 is communicated with described second pipeline 02, and the pressure oil port of described second selector valve 3 is communicated with described first pipeline 01.
Described first pipeline 01 is provided with relief valve 10, for monitoring pressure when oil pump is opened on oil circuit; Pipeline between the actuator port of described first selector valve 2 and the control mouth of described Pilot operated check valve 5 is provided with relief valve 10, for the pressure of monitoring on Pilot operated check valve oil circuit control and on oil cylinder backhaul oil circuit, improves the Security of integrated hydraulic control loop.
First cavity A inside of described oil cylinder 7 is provided with pressure transducer 11, for the collection of the pressure condition and data of monitoring oil cylinder rodless cavity inside; Described first pipeline 01 is also provided with pressure gauge 12, is convenient to obtain the related pressure data on oil circuit, improves the safety of system.
Described first selector valve 2, second selector valve 3, digital phase-shift technology 6, relief valve 10, pressure transducer 11, pressure gauge 12 and displacement detector are all connected with described controller, described controller comprises PLC, programme in PLC, realized the sequence of movement, actuation time etc. of the first selector valve 2, second selector valve 3, digital phase-shift technology 6 etc. by the related data of the pressure transducer 11, pressure gauge 12 and the displacement detector that receive, realize automation mechanized operation.
Air filter 13 is also provided with in hydraulic control circuit of the present invention, described air filter 13 is connected with described fuel tank 1, and air filter is connected with fuel tank, filters the dust etc. in air, play the effect of purification fluid, reduce harmful matter to the infringement of equipment each in hydraulic control circuit.
The specific works principle of hydraulic control circuit of the present invention is as follows:
(1) start oil pump 8 by motor 9, because mediate position and the second selector valve 3 of the first selector valve 2 is in off state, fluid can only flow back in fuel tank 1 through the first selector valve 2, and now system does not have pressure;
(2) when the first cavity A in oil cylinder 7 needs oil-feed, first selector valve 2 is switched to left position, second selector valve 3 does not carry out action, be in off state, two oil circuits are formed altogether: oil circuit is that the fluid in fuel tank 1 flows through oil pump 8 successively in hydraulic control circuit, first selector valve 2, one-way valve 4, Pilot operated check valve 5 enters in the first cavity A of oil cylinder 7, another oil circuit is that the fluid in fuel tank 1 flows through oil pump 8 successively, flow back in fuel tank 1 after one-way valve 4 and digital phase-shift technology 6, now digital phase-shift technology 6 is not closed, hydraulic control circuit internal pressure is not set up, oil cylinder 7 cannot work, when PLC control figure relief valve 6 slowly pressurizes, piston rod in oil cylinder 7 moves to the second cavity B direction under oil pressure effect, when the pressure that controller to be detected by pressure transducer in oil cylinder 7 rises to certain numerical value, PLC control figure relief valve 6 no longer pressurizes in order to avoid cause the pressure adjusting in oil cylinder 7 too high, when no longer changing after the piston rod in oil cylinder 7 meets obstructions, the pressure increase of its inside is to a certain steady state value, and PLC control figure relief valve 6 carries out normal pressurization work,
(3) when the displacement of the pressure in oil cylinder 7 or its piston rod reaches desired value, hydraulic control circuit quits work, now oil cylinder 7 is in packing state, when oil cylinder 7 is because leaking the pressure drop causing its inside to keep, hydraulic control circuit recovers fuel feeding, thus ensures that oil cylinder 7 internal pressure returns to the pressure of required pressurize;
(4) when oil cylinder 7 needs off-load, first selector valve 2 is switched to right position, second selector valve 3 does not carry out action, be in off state, pressure oil opens Pilot operated check valve 5 through the first selector valve 2, pressure oil in oil cylinder 7 in first cavity A can only flow back to fuel tank 1 from digital phase-shift technology 6 because of the closedown of one-way valve 4, because digital phase-shift technology 6 is in the working pressure of setting, cause pressure oil in oil cylinder 7 cannot fast discharging, slowly can only regulate when step-down at digital phase-shift technology 6 and slowly unload, the speed of unloading can be regulated by PLC control figure relief valve 6;
(5) when the quick oil return of needs, the second selector valve 3 switches to left position, and the pressure oil in oil cylinder 7 in first cavity A, without the need to directly flowing back to fuel tank through described second selector valve 3 through digital phase-shift technology 6, realizes quick oil return.
Wherein, relief valve 10 when hydraulic control circuit works for limit system when oil pump is opened maximum pressure, for controlling to open the pressure of Pilot operated check valve and restriction B chamber, improve the Security of system.
Adopt hydraulic control circuit of the present invention, comprise fuel tank, the first selector valve, the second selector valve, one-way valve, Pilot operated check valve, digital phase-shift technology, oil cylinder, oil pump, displacement detector and controller, overall structure is simplified; The control to Pilot operated check valve is realized, the opening state of control break Pilot operated check valve by the combination of the first selector valve, Pilot operated check valve and controller, thus the flow direction changing pressure oil; By the combination of the first selector valve, Pilot operated check valve, one-way valve, digital phase-shift technology and controller, make oil cylinder when off-load, pressure oil can only flow back to fuel tank from digital phase-shift technology, but because digital phase-shift technology is in the working pressure of setting, pressure oil in oil cylinder cannot fast discharging, slowly can only regulate when step-down at digital phase-shift technology and slowly unload, the speed of unloading can be controlled by digital phase-shift technology, can realize the release speed needing employing different according to actual conditions; Making the pressure oil in oil cylinder without the need to directly flowing back to fuel tank through digital phase-shift technology by the commutation of the second selector valve, realizing quick oil return; Adopt controller to control, realize automation mechanized operation, increase work efficiency.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a hydraulic control circuit, is characterized in that: comprise fuel tank (1), the first selector valve (2), the second selector valve (3), one-way valve (4), Pilot operated check valve (5), digital phase-shift technology (6), oil cylinder (7), oil pump (8), displacement detector and controller;
Described oil cylinder (7) comprises the first cavity (A) and the second cavity (B), and described displacement detector is connected with the piston rod of described oil cylinder (7);
Described fuel tank (1) is communicated with described oil pump (8), and described oil pump (8) is communicated with by the pressure oil port of the first pipeline (01) with described first selector valve (2);
Between the actuator port that described one-way valve (4) and described Pilot operated check valve (5) are forward connected on described first selector valve (2) successively and first cavity (A) of described oil cylinder (7), another actuator port of described first selector valve (2) is communicated with the control mouth of described Pilot operated check valve (5), described one-way valve (4) is communicated with described Pilot operated check valve (5) by the second pipeline (02), and described digital phase-shift technology (6) is communicated with described second pipeline (02); Second cavity (B) of described oil cylinder (7) is communicated with an actuator port of described second selector valve (3), another actuator port of described second selector valve (3) is communicated with described second pipeline (02), and the pressure oil port of described second selector valve (3) is communicated with described first pipeline (01); Described second selector valve (3) is J type two position and four-way reversing valve;
Described first selector valve (2), the second selector valve (3), digital phase-shift technology (6) and displacement detector are all connected with described controller.
2. hydraulic control circuit according to claim 1, is characterized in that: the pipeline between the actuator port of described first pipeline (01) and described first selector valve (2) and the control mouth of described Pilot operated check valve (5) is equipped with relief valve (10).
3. hydraulic control circuit according to claim 1, is characterized in that: described controller comprises PLC.
4. hydraulic control circuit according to claim 1, is characterized in that: described first cavity (A) inside is provided with pressure transducer (11), and described pressure transducer (11) is connected with described controller.
5. hydraulic control circuit according to claim 1, is characterized in that: described first pipeline (01) is also provided with pressure gauge (12), and described pressure gauge (12) is connected with described controller.
6. the hydraulic control circuit according to claim 1-5 any one, is characterized in that: be also provided with air filter (13), and described air filter (13) is connected with described fuel tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410227467.XA CN103982476B (en) | 2014-05-27 | 2014-05-27 | A kind of hydraulic control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410227467.XA CN103982476B (en) | 2014-05-27 | 2014-05-27 | A kind of hydraulic control circuit |
Publications (2)
| Publication Number | Publication Date |
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| CN103982476A CN103982476A (en) | 2014-08-13 |
| CN103982476B true CN103982476B (en) | 2016-02-10 |
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| CN201410227467.XA Expired - Fee Related CN103982476B (en) | 2014-05-27 | 2014-05-27 | A kind of hydraulic control circuit |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314905B (en) * | 2014-10-14 | 2017-03-15 | 湖南联智桥隧技术有限公司 | Prestressing force intelligent tensioning hydraulic system, prestress tensioning equipment and its control method |
| CN104454697B (en) * | 2014-10-17 | 2016-08-24 | 北京航天益森风洞工程技术有限公司 | Big load quick insertion mechanism's high-speed driving and localization method |
| CN107745020B (en) * | 2017-11-16 | 2023-08-01 | 安徽德系重工科技有限公司 | Hydraulic system of four-roller corrugated plate bending machine |
| CN113153847B (en) * | 2021-04-19 | 2023-03-28 | 无锡贝斯特精机股份有限公司 | Hydraulic control system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56141403A (en) * | 1980-04-07 | 1981-11-05 | Daikin Ind Ltd | Fluid controller |
| JPS6469803A (en) * | 1987-09-11 | 1989-03-15 | Kayaba Industry Co Ltd | Control apparatus for cylinder |
| EP0597109B1 (en) * | 1992-03-09 | 1996-12-18 | Hitachi Construction Machinery Co., Ltd. | Hydraulically driving system |
| CN201914647U (en) * | 2010-12-24 | 2011-08-03 | 广州市环境卫生机械设备厂 | Hydraulic circuit for regulating speed of lifting frame |
| CN202194873U (en) * | 2011-08-18 | 2012-04-18 | 湖南联智桥隧技术有限公司 | Servo pressure maintaining and speed regulation hydraulic circuit |
| CN202273926U (en) * | 2011-09-28 | 2012-06-13 | 山东科技大学 | Heightening system for coal mining machine |
| CN203879824U (en) * | 2014-05-27 | 2014-10-15 | 湖南联智桥隧技术有限公司 | Hydraulic control loop |
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2014
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| CN103982476A (en) | 2014-08-13 |
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Denomination of invention: An hydraulic control circuit for continuously-variariable-transmission Effective date of registration: 20190701 Granted publication date: 20160210 Pledgee: Bank of Communications Co.,Ltd. Hunan Branch Pledgor: Hunan Lianzhi Bridge and Tunnel Technology Co.,Ltd. Registration number: 2019430000061 |
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Date of cancellation: 20200928 Granted publication date: 20160210 Pledgee: Bank of Communications Co.,Ltd. Hunan Branch Pledgor: HUNAN LIANZHI BRIDGE AND TUNNEL TECHNOLOGY Co.,Ltd. Registration number: 2019430000061 |
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