CN103016460B - Photoelectric automatic exhaust valve for hydraulic system - Google Patents
Photoelectric automatic exhaust valve for hydraulic system Download PDFInfo
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- CN103016460B CN103016460B CN201210537225.1A CN201210537225A CN103016460B CN 103016460 B CN103016460 B CN 103016460B CN 201210537225 A CN201210537225 A CN 201210537225A CN 103016460 B CN103016460 B CN 103016460B
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- valve
- solenoid valve
- exhaust valve
- front cover
- hydraulic system
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- 238000013016 damping Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 6
- 239000003921 oil Substances 0.000 abstract description 4
- 239000010720 hydraulic oil Substances 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 3
- 210000000416 exudates and transudate Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention discloses a photoelectric automatic exhaust valve for a hydraulic system. The photoelectric automatic exhaust valve mainly consists of a prism, a sensor, a solenoid valve, a valve body and a control circuit. The photoelectric automatic exhaust valve is arranged on a hydraulic oil tank or a hydraulic cylinder and is connected with the hydraulic system through a small hole with a filter screen, and part of oil and gas can enter the exhaust valve. The prism is mainly used for detecting a liquid level in the valve, and the sensor is used for detecting the temperature, pressure and other parameters in the valve. When exhaust conditions are satisfied, the solenoid valve is controlled by the circuit to open a through hole between the exhaust valve and the outside, and thus gas in the system can be discharged through the exhaust valve. In a mode with no manual operation, air in the hydraulic system can be automatically discharged out of the hydraulic system without oil leakage. Due to photoelectric sensing and circuit control, the parameters in the valve can be detected accurately, and the gas discharge can be controlled accurately.
Description
Technical field
The present invention relates to a kind of photoelectric automatic exhaust valve, particularly relate to a kind of automatic control pressure vent for optical-electrical hydraulic system.
Background technique
If hydraulic system inside exists too many gas, very large harm can be caused to system.And in the fluid of hydraulic system, understand entrained air or other gas unavoidably, therefore, just need to seek one by the method for these gas exudate pressing systems.Automatic control pressure vent is the main selection processing problems at present, it avoid the error that manual operator is shone because of carelessness; Also be applicable to artificial unworkable occasion simultaneously.General automatic control pressure vent needs engaging pressure to control, and is uniquely fixed by contained spring, but contained spring is difficult to regulate; Exist simultaneously and cannot carry out outside condition monitoring, and the feature that remote control ability is weak.So the automatic control ability of general automatic control pressure vent is inadequate.
Summary of the invention
The object of the invention is to be for the deficiencies in the prior art, a kind of photoelectric automatic exhaust valve for hydraulic system is provided, pressurized fuel tank in hydraulic system and the air in oil cylinder or other gas exudate pressing systems can not make fluid leak outside by the present invention automatically, do not need engaging pressure, can control to combine by automatic and manual operation, be applicable to telecontrol simultaneously.
The object of the invention is to be achieved through the following technical solutions: a kind of photoelectric automatic exhaust valve for hydraulic system, it comprises: prism, photocurrent generator, photelectric receiver, control circuit, solenoid valve, temperature transducer, pressure transducer, filter screen, valve body, front cover, rear end cover and seal ring; Wherein, described valve body, front cover are connected successively with rear end cover, form the housing of photoelectric automatic exhaust valve; Sealed volume is formed between valve body and front cover, temperature transducer and pressure transducer are fixed in sealed volume, prism passes front cover and stretches in sealed volume, and photocurrent generator and photelectric receiver are all vertically fixed on above the prism in rear end cover, and are all connected with control circuit; Solenoid valve to be fixed between front cover and rear end cover and to communicate with sealed volume; Solenoid valve, temperature transducer are all connected with control circuit with pressure transducer; Valve body has the entrance of sealed volume, filter screen is installed in ingress, and the bottom of valve body also has seal groove, installs seal ring in it.
Further, also comprise one and be arranged on the first pad between solenoid valve and front cover; Described first pad has damping hole, connects with solenoid valve.
Further, the second pad of a support filter screen is also comprised.
Further, described control circuit comprises single-chip microcomputer, proportional amplifier, resistance R and three signal conditioner, three I/O mouths of single-chip microcomputer are connected with temperature transducer respectively by the first signal conditioner, be connected with pressure transducer by secondary signal conditioner, the negative electrode of photelectric receiver and one end of resistance R is connected by the 3rd signal conditioner, the anode of photocurrent generator is connected with the anode of photelectric receiver, the negative electrode of photocurrent generator and the equal ground connection of the other end of resistance R.The input end of proportional amplifier is connected with single-chip microcomputer I/O, and output terminal is connected with solenoid valve.
The invention has the beneficial effects as follows: the present invention is used for the photoelectric automatic exhaust valve of hydraulic system, and outlet valve is exhausted relevant with liquid level height, and have nothing to do with system engaging pressure; Multiple parameter is Measurement & Control simultaneously, improves this invention stability; Adopt automatically controlled, outlet valve reaction velocity is fast, and automaticity is high; Manual and electric can be selected voluntarily, provides initial and controls and emergency situations process; Circuit is arranged on outlet valve outside, and performance-adjustable is strong.
Below in conjunction with drawings and the embodiments, the present invention is further detailed explanation:
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention for the photoelectric automatic exhaust valve of hydraulic system;
Fig. 2 is the structural drawing of control circuit;
Fig. 3 is software control flow chart;
In figure, prism 1, photocurrent generator 2, photelectric receiver 3, control circuit 4, solenoid valve 5, temperature transducer 6, pressure transducer 7, filter screen 8, valve body 9, front cover 10, rear end cover 11, attachment screw 12, seal ring 13, first pad 14, second pad 15.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
The photoelectric automatic exhaust valve that the present invention is used for hydraulic system comprises: prism 1, photocurrent generator 2, photelectric receiver 3, control circuit 4, solenoid valve 5, temperature transducer 6, pressure transducer 7, filter screen 8, valve body 9, front cover 10, rear end cover 11, seal ring 13.
Valve body 9, front cover 10 are connected successively with rear end cover 11, are configured for the housing of the photoelectric automatic exhaust valve of hydraulic system.Sealed volume is formed between valve body 9 and front cover 10, temperature transducer 6 and pressure transducer 7 are fixed in sealed volume, prism 1 passes front cover 10 and stretches in sealed volume, photocurrent generator 2 and photelectric receiver 3 are all vertically fixed on above the prism 1 in rear end cover 11, and are all connected with control circuit 4.Solenoid valve 5 to be fixed between front cover 10 and rear end cover 11 and to communicate with sealed volume, installs the first pad 14 between solenoid valve 5 and front cover 10.Solenoid valve 5, temperature transducer 6 are all connected with control circuit 4 with pressure transducer 7.The Spielpassung of solenoid valve 5 inside and spool aperture connect sealed volume and air.Valve body 9 has the entrance of sealed volume, filter screen 8 is installed in ingress, and filter screen 8 is supported by the second pad 15.The bottom of valve body 9 also has seal groove, installs seal ring 13 in it.
Valve body 9 is connected with fuel tank or cylinder body by screw 12, and seal ring 13 is revealed for preventing fluid, and the first pad 14 supports filter screen 8, filters oil residue, improves outlet valve cleaning inside degree.The sealed volume that prism 1 is installed between valve body 9 and front cover 10 is inner.Photocurrent generator 2 is vertically arranged on above prism, is delivered to the left-half of prism 1, reflects for generation of light; When meeting liquid level condition, light reflection to photelectric receiver 3, and is passed to control circuit by prism 1.Temperature transducer 6 and pressure transducer 7 are placed in the sealed volume between valve body 9 and front cover 10, measuring system internal pressure and temperature parameter, and pass to control circuit.First pad 14, with damping hole, connects with solenoid valve 5.Control circuit 4 is connected by wire with photocurrent generator 2, photelectric receiver 3, solenoid valve 5, temperature transducer 6, pressure transducer 7, the signal of receiving sensor, the openings of sizes of Controlling solenoid valve 5 and control time.
As shown in Figure 2, control circuit 4 comprises single-chip microcomputer, proportional amplifier, resistance R and three signal conditioner, three I/O mouths of single-chip microcomputer are connected with temperature transducer 6 respectively by the first signal conditioner, be connected with pressure transducer 7 by secondary signal conditioner, the negative electrode of photelectric receiver and one end of resistance R is connected by the 3rd signal conditioner, the anode of photocurrent generator 2 is connected with the anode of photelectric receiver 3, the negative electrode of photocurrent generator 2 and the equal ground connection of the other end of resistance R.The input end of proportional amplifier is connected with single-chip microcomputer I/O, and output terminal is connected with solenoid valve 5.
As shown in Figure 3, the I/O mouth of single-chip microcomputer accepts from photelectric receiver 3, the signal of temperature transducer 6 and pressure transducer 7.Once three signals of input meet simultaneously, another I/O mouth control ratio amplifier of single-chip microcomputer, and then drived control electromagnetic valve work time and opening degree, Exhaust Gas.Once exceed the operating time of single-chip microcomputer setting, or the signal of temperature transducer 6 and pressure transducer 7 does not satisfy condition, and wait state got back to by single-chip microcomputer, waits for that condition meets next time and carries out.
Working procedure of the present invention is as follows: just started to be full of fluid in sealed volume, and solenoid valve 5 spool is mainly by spring force balance cavity volume internal pressure; The light that photocurrent generator 2 produces simultaneously is reflected by prism 1, and photelectric receiver 3 does not have input signal, and all the other parameters are normal; Control circuit 4 does not export the signal of Controlling solenoid valve 5, and solenoid valve 5 is in closed condition.Along with the work of hydraulic system, start to accumulate gas in fuel tank or oil hydraulic cylinder.Gas, by the aperture below valve body 9, through filtering 8 nets, enters the sealed volume of this outlet valve.Gas build at leisure, in sealed volume, liquid level declines; When liquid level drops to setting height, there is total reflection at prism 1 place in the light that photocurrent generator 2 produces, photelectric receiver 3 receives light signal, and by signal transmission to the single-chip microcomputer in control circuit 4.If temperature transducer 6 and pressure transducer 7 meet setting value in single-chip microcomputer simultaneously, control circuit 4 drives solenoid valve 5 opening, and gas is exhausted by the damping hole of the first pad 14 and the passage of solenoid valve 5 indoor design connection sealed volume and air.Openings of sizes and the opening of single-chip microcomputer passing ratio amplifier Controlling solenoid valve 5 are held time, and gas is discharged.After gas is discharged, in sealed volume, liquid level raises, and become refraction by the light of prism 1 again from total reflection, photelectric receiver 3 can not receive input signal.Or the predetermined delay time of single-chip microcomputer or temperature, pressure and other parameters do not meet pre-provisioning request, and solenoid valve 5 quits work, spool is by spring balancing to original operating position, and whole system is closed, and exhaust completes, and wait is vented next time.
Above-mentioned embodiment is used for explaining and the present invention is described, instead of limits the invention, and in the protection domain of spirit of the present invention and claim, any amendment make the present invention and change, all fall into protection scope of the present invention.
Claims (1)
1. the photoelectric automatic exhaust valve for hydraulic system, it is characterized in that, it comprises: prism (1), photocurrent generator (2), photelectric receiver (3), control circuit (4), solenoid valve (5), temperature transducer (6), pressure transducer (7), filter screen (8), valve body (9), front cover (10), rear end cover (11) and seal ring (13); Wherein, described valve body (9), front cover (10) are connected successively with rear end cover (11), form the housing of photoelectric automatic exhaust valve; Sealed volume is formed between valve body (9) and front cover (10), temperature transducer (6) and pressure transducer (7) are fixed in sealed volume, prism (1) is through front cover (10) and stretch in sealed volume, photocurrent generator (2) and photelectric receiver (3) are all vertically fixed on prism (1) top in rear end cover (11), and are all connected with control circuit (4); Solenoid valve (5) to be fixed between front cover (10) and rear end cover (11) and to communicate with sealed volume; Solenoid valve (5), temperature transducer (6) are all connected with control circuit (4) with pressure transducer (7); Valve body (9) has the entrance of sealed volume, filter screen (8) is installed in ingress, and the bottom of valve body (9) also has seal groove, installs seal ring (13) in it; This photoelectric automatic exhaust valve also comprises the second pad (15) that first pad (14) and be arranged between solenoid valve (5) and front cover (10) supports filter screen (8); Described first pad (14) has damping hole, connects with solenoid valve (5); Described control circuit (4) comprises single-chip microcomputer, proportional amplifier, resistance R and three signal conditioner, three I/O mouths of single-chip microcomputer are connected with temperature transducer (6) respectively by the first signal conditioner, be connected with pressure transducer (7) by secondary signal conditioner, the negative electrode of photelectric receiver and one end of resistance R is connected by the 3rd signal conditioner, the anode of photocurrent generator (2) is connected with the anode of photelectric receiver (3), the negative electrode of photocurrent generator (2) and the equal ground connection of the other end of resistance R; The input end of proportional amplifier is connected with single-chip microcomputer I/O, and output terminal is connected with solenoid valve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210537225.1A CN103016460B (en) | 2012-12-13 | 2012-12-13 | Photoelectric automatic exhaust valve for hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210537225.1A CN103016460B (en) | 2012-12-13 | 2012-12-13 | Photoelectric automatic exhaust valve for hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103016460A CN103016460A (en) | 2013-04-03 |
| CN103016460B true CN103016460B (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210537225.1A Active CN103016460B (en) | 2012-12-13 | 2012-12-13 | Photoelectric automatic exhaust valve for hydraulic system |
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| Country | Link |
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| CN (1) | CN103016460B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105317782B (en) * | 2015-11-20 | 2017-03-29 | 常州海宏液压设备有限公司 | Automatic aerofluxuss dredging vessel jack-up hydraulic ram |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5278426A (en) * | 1993-01-21 | 1994-01-11 | Barbier William J | Optical liquid level sensor for pressurized systems utilizing prismatic element |
| US6047720A (en) * | 1995-07-28 | 2000-04-11 | Asg Luftfahrttechnik Und Sensorik Gmbh | Automatic air-vent valve for hydraulic systems |
| US6199574B1 (en) * | 1997-10-02 | 2001-03-13 | Stant Manufacturing Inc. | Electronic fill limit control |
| CN101270812A (en) * | 2007-03-22 | 2008-09-24 | 航天科工海鹰集团有限公司 | Stepped control type flux valve |
| WO2009124009A1 (en) * | 2008-03-31 | 2009-10-08 | Parker-Hannifin Corporation | Automatic air bleed valve for a closed hydraulic system |
| CN102563190A (en) * | 2012-02-03 | 2012-07-11 | 深圳乐满油气技术有限公司 | Pneumatic positioning actuator with intermittent gas supply |
| US8235027B2 (en) * | 2006-11-16 | 2012-08-07 | Aai Corporation | Vent-on-demand fuel sump and fuel system having such a fuel sump |
| CN203023180U (en) * | 2012-12-13 | 2013-06-26 | 浙江大学 | Photoelectric automatic air exhaust valve for hydraulic system |
-
2012
- 2012-12-13 CN CN201210537225.1A patent/CN103016460B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5278426A (en) * | 1993-01-21 | 1994-01-11 | Barbier William J | Optical liquid level sensor for pressurized systems utilizing prismatic element |
| US6047720A (en) * | 1995-07-28 | 2000-04-11 | Asg Luftfahrttechnik Und Sensorik Gmbh | Automatic air-vent valve for hydraulic systems |
| US6199574B1 (en) * | 1997-10-02 | 2001-03-13 | Stant Manufacturing Inc. | Electronic fill limit control |
| US8235027B2 (en) * | 2006-11-16 | 2012-08-07 | Aai Corporation | Vent-on-demand fuel sump and fuel system having such a fuel sump |
| CN101270812A (en) * | 2007-03-22 | 2008-09-24 | 航天科工海鹰集团有限公司 | Stepped control type flux valve |
| WO2009124009A1 (en) * | 2008-03-31 | 2009-10-08 | Parker-Hannifin Corporation | Automatic air bleed valve for a closed hydraulic system |
| CN102563190A (en) * | 2012-02-03 | 2012-07-11 | 深圳乐满油气技术有限公司 | Pneumatic positioning actuator with intermittent gas supply |
| CN203023180U (en) * | 2012-12-13 | 2013-06-26 | 浙江大学 | Photoelectric automatic air exhaust valve for hydraulic system |
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| CN103016460A (en) | 2013-04-03 |
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| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ouyang Xiaoping Inventor after: Yang Jinjiang Inventor after: Wang Junhui Inventor before: Ouyang Xiaoping Inventor before: Wang Junhui |
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Free format text: CORRECT: INVENTOR; FROM: OUYANG XIAOPING WANG JUNHUI TO: OUYANG XIAOPING YANG JINJIANG WANG JUNHUI |
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| C14 | Grant of patent or utility model | ||
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