CN101307840A - Water impact preventing control valve core control system - Google Patents
Water impact preventing control valve core control system Download PDFInfo
- Publication number
- CN101307840A CN101307840A CNA2008100626363A CN200810062636A CN101307840A CN 101307840 A CN101307840 A CN 101307840A CN A2008100626363 A CNA2008100626363 A CN A2008100626363A CN 200810062636 A CN200810062636 A CN 200810062636A CN 101307840 A CN101307840 A CN 101307840A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000006073 displacement reaction Methods 0.000 claims abstract description 15
- 239000002828 fuel tank Substances 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 238000009530 blood pressure measurement Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 1
- 230000037361 pathway Effects 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000032696 parturition Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
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Abstract
The invention discloses a water hammer preventing operating valve core control system, comprising a motor, a pump, an oil/water tank, a filter, a safety valve, a check valve, a pressure reducing valve, a proportional overflow valve, a servo valve, a hydraulic cylinder, a pressure difference sensor and a pressure difference controller. An inlet of the proportional overflow valve is connected with a cavity of a spring cylinder; a spring of the spring cylinder is compressed through a piston rod, and the control pressure of the proportional overflow valve is converted into the displacement control of a throttle valve core, so as to realize the switching speed controllability of a water hammer preventing operating valve core. Two pressure measurement points of the pressure difference sensor are connected with an inlet and an outlet of the throttle valve core, so as to give pressure difference feedback to the pressure difference controller; the opening degree of the a regulating valve core through the hydraulic cylinder controlled by the servo valve, the fore-and-aft pressure difference of the throttle valve core is controlled by a closed ring, so as to realize the speed regulation on a main liquid pathway. The control system can realize the low-speed control system switching of the throttle valve core, so as to effectively inhibit and weaken water hammer.
Description
Technical field
The present invention relates to fluid pressure actuator, especially relate to a kind of water impact preventing control valve core control system.
Background technique
In industrial fields such as water conservancy, nuclear power, medium transport, the switching of big flow operating mode down-off control valve is easy to generate the water hammer with serious harm.The spool switch speed of controlling big flow control valve be the important measures of control water attack harm, particularly spool switch to control at a slow speed and keep the speed regulating control of pressure reduction all be the key of the big flow control valve of high-performance.In recent years along with industrial development is more and more higher to the requirement of Water Hammer Control in nuclear power and the water conservancy machinery, and relevant traditional slow control spool technology can't practical requirement.
Summary of the invention
The object of the present invention is to provide a kind of water impact preventing control valve core control system, be used for the flow control under the big flow operating mode, control system as anti-water attack spool manipulation, the speed regulating control of controlling at a slow speed and keeping the throttling valve core inlet outlet pressure differential that the control spool switches, realize the speed governing of control water attack harm and large flow pipe road system, be applicable to the high-performance flow control of the fluid system that water attack harm is serious.
The technical solution adopted for the present invention to solve the technical problems is:
Comprise fuel tank or water tank, filter, motor, pump, safety valve, proportional pressure control valve, one-way valve, reduction valve, servovalve, spring cylinder, oil hydraulic cylinder, differential pressure pickup, differential pressure controller; The inlet of the pump that motor drags is connected with fuel tank or water tank by filter, be divided into two-way behind delivery side of pump attachment security valve inlet and the one-way valve, one the tunnel connects a chamber of proportional pressure control valve inlet and spring cylinder, another road connects the inlet of reduction valve, the outlet of reduction valve connects the P mouth of servovalve, the A of servovalve, B, T mouth connect two chambeies and the fuel tank or the water tank of oil hydraulic cylinder respectively, the outlet of safety valve and proportional pressure control valve and equal connected tank of the spring chamber of spring cylinder or water tank; Spring cylinder is connected throttling valve core and adjusting pressuring valve core respectively with the output piston bar of oil hydraulic cylinder.
Differential pressure controller comprises pressure differential resetting signal and addition unit, two pressure-measuring points of differential pressure pickup connect the entrance and exit of throttling valve core, the pressure difference signal output that records is connected to the addition unit of differential pressure controller, addition unit is connected with the pressure differential resetting signal, and the deviation signal output that obtains is connected to servovalve formation close-loop feedback control.
In the spring chamber of described spring cylinder spring is housed, the piston rod that is promoted by proportional pressure control valve inlet set pressure is pressed on the spring, and piston rod stretches out the outer part of spring cylinder and connects throttling valve core, and the other end connects displacement transducer.
The spring of described spring cylinder or place outside the cylinder body of spring cylinder, an end and the cylinder body of spring are affixed, and the other end is pushed by piston rod or stretches, and piston rod passes spring and is connected with throttling valve core, and the other end of piston rod connects displacement transducer.
The beneficial effect that the present invention has is:
(1) adopts the proportional pressure control valve pilot pressure, be converted to displacement, can realize spool control at a slow speed by spring, the corresponding throttling valve core change in displacement of variation in pressure, can require the setting pressure variance ratio according to the spool control rate, flexible, and realize the control at a slow speed that spool switches easily.
(2) utilize closed loop control to realize the stable control of pressure reduction, have the control accuracy height, the characteristics that antijamming capability is strong, it is stable to be specially adapted to the pressure reduction of surge pressure wave movable property when giving birth to.
(3) the hydraulic driving part should design overpressure protector, prevents to surpass load damage valve rod; Proportional pressure control valve is used for the control of throttling valve core displacement on the one hand, can prevent system overload damage valve rod on the other hand, has the function of superpressure overload protection
(4) reduction valve is used to regulate the pressure of servovalve P mouth, for regulating the servovalve working pressure, keeps stabilization of operating point to have effect preferably.
(5) this spool control system has advantage simple in structure, that operating range is big, performance is high, is suitable for seriation and modularization production.
(6) spring cylinder of control node flow valve core has displacement transducer, can detect the aperture of throttling valve core in real time, has intuitive and reliable characteristics.
(7) this spool control system also can adapt to the application of special occasions such as nuclear power system etc. by pump, valve, oil hydraulic cylinder, pipeline etc. are replaced by water hydraulic element and rust preventive material.
Description of drawings
Accompanying drawing is a structural principle schematic representation of the present invention.
Among the figure: 1. fuel tank or water tank, 2. filter, 3. motor, 4. pump, 5. safety valve, 6. proportional pressure control valve, 7. one-way valve, 8. reduction valve, 9. servovalve, 10. displacement transducer, 11. spring cylinders, 11-1. piston rod, 11-2. spring, 11-3. cylinder body, 12. oil hydraulic cylinders, 13. throttling valve core, 14. adjusting pressuring valve cores, 15. differential pressure pickups, 16. the pressure differential resetting signal, 17. summing points, 18. differential pressure controllers.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in drawings, water impact preventing control valve core control system of the present invention comprises: comprise fuel tank or water tank 1, filter 2, motor 3, pump 4, safety valve 5, proportional pressure control valve 6, one-way valve 7, reduction valve 8, servovalve 9, spring cylinder 11, oil hydraulic cylinder 12, differential pressure pickup 15 and differential pressure controller 18; The inlet of the pump 4 that motor 3 drags is connected with fuel tank or water tank 1 by filter 2, be divided into two-way behind outlet attachment security valve 5 inlets of pump 4 and the one-way valve 7, one the tunnel connects a chamber of proportional pressure control valve 6 inlets and spring cylinder 11, another road connects the inlet of reduction valve 8, the outlet of reduction valve 8 connects the P mouth of servovalve 9, the A of servovalve 9, B, T mouth connect two chambeies and the fuel tank/water tank 1 of oil hydraulic cylinder 12 respectively, and the outlet of safety valve 5 and proportional pressure control valve 6 and the spring chamber of spring cylinder 11 all take back fuel tank/water tank 1; Spring cylinder 11 is connected throttling valve core 13 and adjusting pressuring valve core 14 respectively with the output piston bar of oil hydraulic cylinder 12, promotes throttling valve core 13 and adjusting pressuring valve core 14 and move flow area separately on the change primary path respectively.The safety valve 5 in the outlet port of pump 4 is used to protect pump 4, and proportional pressure control valve 6 is the pressure in Regulation spring cylinder 11 1 chambeies on the one hand, can prevent system overload damage valve rod on the other hand, and reduction valve 8 is used to regulate the P mouth pressure of servovalve 9.
Spring 11-2 is housed in the spring chamber of spring cylinder 11, as shown in drawings, the piston rod 11-1 that is promoted by proportional pressure control valve 6 inlet set pressures passes through pressure spring 11-2, the pressure of proportional pressure control valve 6 control is converted to displacement and by the piston rod 11-1 output of spring cylinder 11 and promote throttling valve core 13 actions, to change the throttle orifice flow area of control valve.The other end of the piston rod 11-1 of spring cylinder 11 is connected with displacement transducer 10, can detect the displacement of throttling valve core 13 in real time.
The spring 11-2 of spring cylinder 11 or place cylinder body 11-3 outside, spring 11-2 one end and cylinder body 11-3 are affixed, and the other end is pushed by piston rod 11-1 or stretches, and piston rod 11-1 still passes spring 11-2 and is connected with throttling valve core 13.
The control signal of scaling up relief valve 6, the pressure in one chamber of proportional pressure control valve 6 inlet and the spring cylinder 11 that is attached thereto rises, the decrement of the piston rod 11-1 pressure spring 11-2 of spring cylinder 11 increases and promotes throttling valve core 13, and then reduces the throttle orifice flow area; Otherwise, when the input signal that reduces proportional pressure control valve 6, the pressure in one chamber of proportional pressure control valve 6 inlet and the spring cylinder 11 that is attached thereto descends, and the decrement of the piston rod 11-1 pressure spring 11-2 of spring cylinder 11 reduces and spur throttling valve core 13, and then increase throttle orifice flow area.Like this, can control the valve port flow area of throttling valve core 13 by the control signal that changes proportional pressure control valve 6, the adjusting size of the valve port flow area of throttling valve core 13 and governing speed can be by the control signal controls of proportional pressure control valve 6, and, by spring 11-2 the pilot pressure of proportional pressure control valve 6 is converted to displacement, can realize the switching controls at a slow speed of throttling valve core 13, reach the purpose of anti-water attack.The switch speed of throttling valve core 13 is by the rate of change regulation and control of the control signal of proportional pressure control valve 6, and its operating range is big, the control performance height.
The inlet of proportional pressure control valve 6 connects one-way valve 7, the inlet of reduction valve 8 and a chamber of spring cylinder 11 of pump discharge, is used for the control of throttling valve core 13 displacements on the one hand, can prevent system overload damage valve rod on the other hand, has the function of superpressure overload protection.Reduction valve 8 is used to regulate the P mouth pressure of servovalve 9, can regulate servovalve 9 working pressures, keeps its stabilization of operating point.
Claims (3)
1, a kind of water impact preventing control valve core control system is characterized in that: comprise fuel tank or water tank (1), filter (2), motor (3), pump (4), safety valve (5), proportional pressure control valve (6), one-way valve (7), reduction valve (8), servovalve (9), spring cylinder (11), oil hydraulic cylinder (12), differential pressure pickup (15), differential pressure controller (18); The inlet of the pump (4) that motor (3) drags is connected with fuel tank or water tank (1) by filter (2), be divided into two-way behind outlet attachment security valve (5) inlet of pump (4) and the one-way valve (7), one the tunnel connects a chamber of proportional pressure control valve (6) inlet and spring cylinder (11), another road connects the inlet of reduction valve (8), the outlet of reduction valve (8) connects the P mouth of servovalve (9), the A of servovalve (9), B, the T mouth connects two chambeies and the fuel tank or the water tank (1) of oil hydraulic cylinder (12), the outlet of safety valve (5) and proportional pressure control valve (6) and the equal connected tank of spring chamber of spring cylinder (11) or water tank (1) respectively; Spring cylinder (11) is connected throttling valve core (13) and adjusting pressuring valve core (14) respectively with the output piston bar of oil hydraulic cylinder (12), described differential pressure controller (18), comprise pressure differential resetting signal (16) and addition unit (17), two pressure-measuring points of differential pressure pickup (15) connect the entrance and exit of throttling valve core (13), the pressure difference signal output that records is connected to the addition unit (17) of differential pressure controller (18), addition unit (17) is connected with pressure differential resetting signal (16), and the deviation signal output that obtains is connected to servovalve (9) formation close-loop feedback control.
2. a kind of water impact preventing control valve core control system according to claim 1, it is characterized in that: spring (11-2) is housed in the spring chamber of described spring cylinder (11), the piston rod (11-1) that is promoted by proportional pressure control valve (6) inlet set pressure is pressed on the spring (11-2), piston rod (11-1) stretches out the outer part of spring cylinder (11) and connects throttling valve core (13), and the other end connects displacement transducer (10).
3. a kind of water impact preventing control valve core control system according to claim 1, it is characterized in that: the spring (11-2) of described spring cylinder (11) or place outside the cylinder body (11-3) of spring cylinder (11), one end of spring (11-2) and cylinder body (11-3) are affixed, the other end is by piston rod (11-1) pushing or stretching, piston rod (11-1) passes spring (11-2) and is connected with throttling valve core (13), and the other end of piston rod (11-1) connects displacement transducer (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100626363A CN101307840B (en) | 2008-06-27 | 2008-06-27 | Water impact preventing control valve core control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100626363A CN101307840B (en) | 2008-06-27 | 2008-06-27 | Water impact preventing control valve core control system |
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| Publication Number | Publication Date |
|---|---|
| CN101307840A true CN101307840A (en) | 2008-11-19 |
| CN101307840B CN101307840B (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100626363A Expired - Fee Related CN101307840B (en) | 2008-06-27 | 2008-06-27 | Water impact preventing control valve core control system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536930A (en) * | 2010-12-28 | 2012-07-04 | 中国船舶重工集团公司第七一三研究所 | Closed loop secondary speed control device controlled by guide operation flow |
| CN102758808A (en) * | 2012-07-26 | 2012-10-31 | 徐州徐工挖掘机械有限公司 | Pilot oil source control block of front high-pressure filter |
| CN103180647A (en) * | 2010-09-09 | 2013-06-26 | 基伊埃图亨哈根有限公司 | Diagnostic method for poppet valves and measuring device for carrying out said method |
| CN103727285A (en) * | 2013-12-31 | 2014-04-16 | 超达阀门集团股份有限公司 | Valve for controlling driving device with servo valve |
| CN104595273A (en) * | 2015-01-14 | 2015-05-06 | 柳州柳工挖掘机有限公司 | Refined operation hydraulic system of engineering machinery |
| CN107269864A (en) * | 2017-07-10 | 2017-10-20 | 太原理工大学 | A kind of gate valve and gate valve control method |
| CN107802898A (en) * | 2017-11-22 | 2018-03-16 | 成都理工大学 | A kind of thoracic duction instrument |
| CN109642685A (en) * | 2016-08-30 | 2019-04-16 | 韩国水力原子力株式会社 | Use the method and apparatus of locator Model Diagnosis pneumatic control valve |
| CN111188935A (en) * | 2018-11-14 | 2020-05-22 | 中国石油化工股份有限公司 | Flame detection-based emergency cut-off angular travel valve device and using method |
-
2008
- 2008-06-27 CN CN2008100626363A patent/CN101307840B/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103180647A (en) * | 2010-09-09 | 2013-06-26 | 基伊埃图亨哈根有限公司 | Diagnostic method for poppet valves and measuring device for carrying out said method |
| CN102536930B (en) * | 2010-12-28 | 2015-11-11 | 中国船舶重工集团公司第七一三研究所 | A kind of closed loop secondary arrangements for speed regulation of pilot operated flow control |
| CN102536930A (en) * | 2010-12-28 | 2012-07-04 | 中国船舶重工集团公司第七一三研究所 | Closed loop secondary speed control device controlled by guide operation flow |
| CN102758808A (en) * | 2012-07-26 | 2012-10-31 | 徐州徐工挖掘机械有限公司 | Pilot oil source control block of front high-pressure filter |
| CN102758808B (en) * | 2012-07-26 | 2015-03-11 | 徐州徐工挖掘机械有限公司 | Pilot oil source control block of front high-pressure filter |
| CN103727285A (en) * | 2013-12-31 | 2014-04-16 | 超达阀门集团股份有限公司 | Valve for controlling driving device with servo valve |
| CN104595273A (en) * | 2015-01-14 | 2015-05-06 | 柳州柳工挖掘机有限公司 | Refined operation hydraulic system of engineering machinery |
| CN109642685A (en) * | 2016-08-30 | 2019-04-16 | 韩国水力原子力株式会社 | Use the method and apparatus of locator Model Diagnosis pneumatic control valve |
| CN107269864A (en) * | 2017-07-10 | 2017-10-20 | 太原理工大学 | A kind of gate valve and gate valve control method |
| WO2019010708A1 (en) * | 2017-07-10 | 2019-01-17 | 太原理工大学 | Gate valve and gate valve control method |
| CN107269864B (en) * | 2017-07-10 | 2021-07-02 | 太原理工大学 | Gate valve and gate valve control method |
| CN107802898A (en) * | 2017-11-22 | 2018-03-16 | 成都理工大学 | A kind of thoracic duction instrument |
| CN111188935A (en) * | 2018-11-14 | 2020-05-22 | 中国石油化工股份有限公司 | Flame detection-based emergency cut-off angular travel valve device and using method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101307840B (en) | 2010-06-16 |
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Granted publication date: 20100616 Termination date: 20130627 |