CN103335158B - The multi-control positive displacement of one machine is without electric snap switch electro-hydraulic device - Google Patents
The multi-control positive displacement of one machine is without electric snap switch electro-hydraulic device Download PDFInfo
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- CN103335158B CN103335158B CN201310297937.5A CN201310297937A CN103335158B CN 103335158 B CN103335158 B CN 103335158B CN 201310297937 A CN201310297937 A CN 201310297937A CN 103335158 B CN103335158 B CN 103335158B
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Abstract
The multi-control positive displacement of one machine is without electric snap switch electro-hydraulic device, comprise control system, hydraulic system and actuator, described hydraulic system is modular structure, comprises fuel tank assembly, main valve group, valve group, described actuator is servo cushion cylinder, and servo cushion cylinder exports connection control valve; Described fuel tank assembly exports and connects main valve group, and main valve group exports and connects servo cushion cylinder through valve group, and described main valve group is provided with pressure transmitter, accumulator.Solve control valve and realize the problem of larger open and close valve with less space, less kinetic energy.Have operate steadily, reliable operation, volume are little, validity is high, easy to operate, low-cost feature, and floor space is little, can realize the many valves of a machine and control.
Description
Technical field
Model utility of the present invention relates to a kind of valve electrofluidic control device, and particularly a kind of high temperature pump gateway valve multiple spot positive displacement is without electric snap switch electrofluidic control device.
Background technique
At present, petrochemical industry, electric power, metallurgy high temperature pumps entrance manually-operated gate, and accident is shutted off power in emergency operating difficulties, cannot turn off fast.So far Frequent Accidents sets off an explosion, and the safety of production and device when shutting off power in emergency in order to ensure pressure piping accident, eliminate safe hidden trouble generation, stops accident.Therefore petrochemical industry, electric power, metallurgical pressure piping and high temperature pump gateway valve, transform without electric snap switch control gear.Avoid the massive losses of the personnel that cause and property.
Summary of the invention
Its object of the present invention is just to provide the multi-control positive displacement of a machine without electric snap switch electro-hydraulic device, solves control valve and realizes the problem of larger open and close valve with less space, less kinetic energy.Have operate steadily, reliable operation, volume are little, validity is high, easy to operate, low-cost feature, and floor space is little, can realize the many valves of a machine and control.
Realize above-mentioned purpose and the technological scheme taked, comprise control system, hydraulic system and actuator, described hydraulic system is modular structure, comprises fuel tank assembly, main valve group, valve group, described actuator is servo cushion cylinder, and servo cushion cylinder exports connection control valve, described fuel tank assembly exports and connects main valve group, main valve group exports and connects servo cushion cylinder through valve group, described main valve group is provided with pressure transmitter, accumulator, described fuel tank assembly YZ comprises level meter FL, fuel tank YX, air-strainer Y, return filter L2, heat exchanger CW, described main valve group ZZ comprises filter L1, throttle valve (M2, M3), one-way valve (V1, V2, V3), pilot operated compound relief valve AV1, output throttling valve (M4, M5), described valve group FZ1 comprises manual fuel tank unloading valve MV1, reduction valve AV2, oil cylinder rodless end solenoid valve DV1, Pilot operated check valve (CV1, CV2), oil cylinder rod end solenoid valve DV2, bypass one-way valve V4, valve group outlet shutoff valve (M12, M13), described fuel tank assembly YZ outlet connects through high-pressure stop valve M1 the oil hydraulic pump P controlled by motor M, oil hydraulic pump P exports the entrance point connecting main valve group ZZ filter L1, pilot operated compound relief valve AV1, main valve group ZZ filter L1 output terminal is through one-way valve V1 Bonding pressure table G, accumulator ZL1, pressure transmitter Pt, main valve group ZZ pilot operated compound relief valve AV1 flow-off one tunnel connects fuel tank assembly YZ heat exchanger CW, return filter L2, and another road is through output throttling valve M5 connection valve group FZ1 oil cylinder rod end solenoid valve DV2, described fuel tank assembly YZ exports one-way valve V2, V3 of connecting two series connection through hand pump SP, one-way valve V2, V3 common port of series connection is through output throttling valve M4 connection valve group FZ1 oil cylinder rodless end solenoid valve DV1, and one-way valve V2, V3 output terminal of two series connection is connected in parallel on the one-way valve V1 output terminal be connected with filter L1, described valve group FZ1 comprises oil inlet P 1, oil outlet A1, oil return import B1, oil return outlet T1, oil inlet P 1 is connected with oil cylinder rodless end solenoid valve DV1, oil outlet A1 is connected with servo cushion cylinder SG1 rear end, oil return import B1 connects oil cylinder rod end solenoid valve DV2 through Pilot operated check valve CV2, and oil cylinder rod end solenoid valve DV2 output terminal connects oil return outlet T1.
beneficial effect
Compared with prior art the present invention has the following advantages.
1) this device can power-off at the scene, personnel to when not on-the-spot, realize the control to valve recloser;
2) have operate steadily, reliable operation, volume are little, validity is high, easy to operate, low-cost feature, and floor space is little, can realize the many valves of a machine and control;
3) solve atmospheric control response comparatively slow, control accuracy is not good enough, and Frequent Troubles, stopped the supple of gas or steam without electricity and caused the out of contior situation of valve winter;
4) solve electric control system to surpass force square fault and can not work, overtemperature protection affects device and normally opens, and forced outage cannot cause damage by switch valve.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is this device Hydraulic System Principle schematic diagram;
Fig. 2 is this apparatus control system electricity principle schematic;
Fig. 3 is this device control valve switching logic schematic diagram.
Embodiment
This device comprises control system, hydraulic system and actuator, as shown in Figure 1, described hydraulic system is modular structure, comprises fuel tank assembly YZ, main valve group ZZ, valve group FZ1, described actuator is servo cushion cylinder SG1, and servo cushion cylinder SG1 exports connection control valve; Described fuel tank assembly YZ exports and connects main valve group ZZ, and main valve group ZZ exports and connects servo cushion cylinder SG1 through valve group FZ1, and described main valve group ZZ is provided with pressure transmitter Pt, accumulator ZL1.
As shown in Figure 1, described fuel tank assembly YZ comprises level meter FL, fuel tank YX, air-strainer Y, return filter L2, heat exchanger CW, described main valve group ZZ comprises filter L1, throttle valve (M2, M3), one-way valve (V1, V2, V3), pilot operated compound relief valve AV1, output throttling valve (M4, M5), and described valve group FZ1 comprises manual fuel tank unloading valve MV1, reduction valve AV2, oil cylinder rodless end solenoid valve DV1, Pilot operated check valve (CV1, CV2), oil cylinder rod end solenoid valve DV2, bypass one-way valve V4, valve group outlet shutoff valve (M12, M13); Described fuel tank assembly YZ outlet connects through high-pressure stop valve M1 the oil hydraulic pump P controlled by motor M, oil hydraulic pump P exports the entrance point connecting main valve group ZZ filter L1, pilot operated compound relief valve AV1, main valve group ZZ filter L1 output terminal is through one-way valve V1 Bonding pressure table G, accumulator ZL1, pressure transmitter Pt, main valve group ZZ pilot operated compound relief valve AV1 flow-off one tunnel connects fuel tank assembly YZ heat exchanger CW, return filter L2, and another road is through output throttling valve M5 connection valve group FZ1 oil cylinder rod end solenoid valve DV2; Described fuel tank assembly YZ exports one-way valve V2, V3 of connecting two series connection through hand pump SP, one-way valve V2, V3 common port of series connection is through output throttling valve M4 connection valve group FZ1 oil cylinder rodless end solenoid valve DV1, and one-way valve V2, V3 output terminal of two series connection is connected in parallel on the one-way valve V1 output terminal be connected with filter L1; Described valve group FZ1 comprises oil inlet P 1, oil outlet A1, oil return import B1, oil return outlet T1, oil inlet P 1 is connected with oil cylinder rodless end solenoid valve DV1, oil outlet A1 is connected with servo cushion cylinder SG1 rear end, oil return import B1 connects oil cylinder rod end solenoid valve DV2 through Pilot operated check valve CV2, and oil cylinder rod end solenoid valve DV2 output terminal connects oil return outlet T1.
As shown in Figure 2, described control system comprises PLC CPU224XP, A/D acquisition module EM231, I/O module EM222, displacement transducer, signal isolator and switch power, ups power.
Described valve group FZ1 and servo cushion cylinder SG1 can be one group, also can be many groups, can expand, realize multiparty control; Described accumulator ZL1, ZL2 are provided with two parallel connections.
Its principle of this device utilizes volume pressurising accumulation of energy, when nobody, without high temperature pump gateway valve when electric situation, automatically can realize multiple stage and automatically control open and close valve fast simultaneously, the multiple spot volume that control accident occurs is without electric snap switch electrofluidic control device.
This device comprises control system, hydraulic system and actuator, and control system critical piece comprises programmable controller PLC, A/D acquisition module EM231, I/O module EM222, displacement transducer, signal isolator and switch power, ups power; Hydraulic system critical piece comprises fuel tank assembly YZ, motor D, oil hydraulic pump P, hand pump SP, main valve group ZZ, accumulator ZL1 and ZL2, pointer pressure G, pressure transmitter Pt, valve group FZ1 ~ FZ4 and servo cushion cylinder SG1 ~ SG4; Actuator is converted to valve body switch action component cylinder movement.
System pressure transmitter Pt gathers current system pressure, then pressure signal is delivered in PLC control system, when system pressure is lower than low pressure limit (can arrange), control system controls motor-pump assembly and starts, hydraulic oil supercharging from fuel tank YX inspiration oil hydraulic pump P, high pressure oil after supercharging enters accumulation of energy in accumulator ZL1, ZL2 after filter L1 filters, and high pressure oil constantly enters accumulator ZL1, ZL2, and simultaneity factor pressure constantly rises, when PLC control system detected pressures reaches upper pressure limit (can arrange), control system controls to cut off motor-pump assembly power supply, and motor-pump assembly quits work, and system pressure enters packing state, the power fluid force feed needed during whole system work is just provided by accumulator ZL1, ZL2, when valve needs action, accumulator ZL1, ZL2 release portion pressure-driven cylinder action, system pressure declines simultaneously, when PLC control system detects pressure drop to lower limit (can arrange), control system controls again motor-pump assembly and starts, and system enters pressurized state again, whole process circulation perseveration, send valve opening when control room or close valve instruction, after electrofluidic control device controller receives instruction, analyze the action that present instruction needs to perform, corresponding oil cylinder rodless end solenoid valve DV1 in the DO port control valve group FZ1 ~ FZ4 of control PLC again, oil cylinder rod end solenoid valve DV2 opens or closes hydraulic control cylinder and stretches out or retraction piston rod, cylinder piston rod drives actuator drive on-the-spot valve to open or close again, when control system is due to outside cause, when losing power supply, (ups power in control system starts supply electric power, this mainly meets charged control valve Electrical Safety, this power supply of dead electricity need not, UPS Electric Design capacity is 7 ampere-hours, can guarantee that system accepts user instruction action to setting safe condition, even after system UPS electric power also lost efficacy) oil cylinder rodless end solenoid valve DV1, the whole dead electricity of oil cylinder rod end solenoid valve DV2, accumulator ZL1, hydraulic oil in ZL2 exports from pipeline, be example through below one-way valve V2(and valve group FZ1), hydraulic oil enters a mouth of oil cylinder rodless end solenoid valve DV1 through output throttling valve M4, go out from b mouth, by Pilot operated check valve CV1, open Pilot operated check valve CV2 simultaneously, hydraulic oil after Pilot operated check valve CV1 through reduction valve AV2 step-down, limit oil pressure thus restriction pass valve moment, hydraulic oil enters servo cushion cylinder SG1 rear end by stop valve M12, oil cylinder is driven to stretch out piston rod, piston rod band actuator closes valve site, hydraulic oil flows out from servo cushion cylinder SG1 rod end hydraulic fluid port, through stop valve M13, Pilot operated check valve CV2, enter the b mouth of oil cylinder rod end solenoid valve DV2, flow out through c mouth, hydraulic oil is through output throttling valve M5, heat exchanger CW, filter L2 flows back to fuel tank YX, possess manual operation function, after opening manual fuel tank unloading valve MV1, i.e. handwheel execute-in-place valve in available actuator, if oil cylinder rodless end solenoid valve DV1, oil cylinder rod end solenoid valve DV2 install regular tap solenoid valve, possesses simple switch function, if proportion of installation modulating valve, possesses fine adjustment valve position function, if install oil cylinder rodless end solenoid valve DV1(to lead to without a mouth during electricity and b oral groove), realize volume without the fast quick-closing valve function of electricity, if installed without a mouth during electricity and c oral groove electric change valve DV1, realize without Lock function during electricity, according to scene control valve quantity N simultaneously, the quantity N of FZ1 ~ FZn valve group is installed, possesses extensibility.
1, control system
Use discontinuous pattern of pressure.Because valve site time of movement is few, operating frequency is less than 10Hz, and system pressure is almost lossless.In order to reduce control system energy consumption, pressure transmitter Pt gathers current system pressure, then pressure signal is delivered in PLC control system, when system pressure is lower than low pressure limit (can arrange), control system control pump unit starting, hydraulic oil supercharging from fuel tank YX inspiration feed liquor press pump P, the high pressure oil after supercharging enters accumulation of energy in accumulator ZL1, ZL2 after filter L1 filters, and accumulator ZL1, ZL2 system pressure rises; When system pressure reaches upper pressure limit (can arrange), control system cutting-off liquid press pump P power supply, quit work, system pressure enters packing state; Whole system work kinetic energy is provided by accumulator ZL1, ZL2, when valve needs action, accumulator ZL1, ZL2 release portion pressure-driven cylinder action, system pressure declines simultaneously, when PLC control system detects pressure to lower limit (can arrange), control system is controller pump startup again, and system enters pressurized state again, and the controller in control system completes whole process circulation perseveration automatically.
Discontinuous pattern of pressure is have a lot of benefit for the operating mode that operating frequency is few.The first, energy saving of system lowers consumption, and whole pressure process is normally no more than 1 minute, and contrast pump 24 continuous throughout the twenty-four hour24 mode, discontinuous pattern of pressure power consumption is almost negligible.The second, due to pump intermittent pressurized, the temperature of system liquid force feed can not raise, and ensure that the sealing of hydraulic system, and the long-term operation of device adds the working life of system sealing and hydraulic component.
On-the-spot number deck valve door can be controlled simultaneously, also can arbitrary extension, the pressure oil in system dynamic pressure source is provided by accumulator ZL1, ZL2, kinetic energy pressure oil flows out from accumulator ZL1, ZL2, export toward each valve group FZ1 ~ FZ4 after one-way valve V2, for valve group FZ1, other valve group principles of work and power are identical, after hydraulic oil to output throttling valve M4:
1) when valve site is failure to actuate, DV1 is often charged for oil cylinder rodless end solenoid valve, and pressure oil is ended by oil cylinder rodless end solenoid valve DV1 and oil cylinder rod end solenoid valve DV2, oil cylinder SG1 two ends not liquid in-out force feeds, oil cylinder SG1 is failure to actuate, and it is motionless that valve position is locked in certain position;
2) when on-the-spot valve needs to cut out, oil cylinder rodless end solenoid valve DV1, oil cylinder rod end solenoid valve DV2 dead electricity, pressure oil is through oil cylinder rodless end solenoid valve DV1, open Pilot operated check valve CV1 simultaneously, pressure oil is after reduction valve AV2 reduces pressure, oil hydraulic cylinder SG1 rear end is entered through stop valve M12, promote hydraulic cylinder piston rod throttle down, the low pressure oil of oil hydraulic cylinder SG1 rod end is through stop valve M12, Pilot operated check valve CV2, oil cylinder rod end solenoid valve solenoid valve DV2, throttle valve M5, after heat exchanger CW, get back to fuel tank YX through filter L2;
3) when on-the-spot valve needs to open, DV2 is charged for oil cylinder rodless end solenoid valve DV1, oil cylinder rod end solenoid valve, pressure oil is through oil cylinder rod end solenoid valve DV2, open Pilot operated check valve CV2 simultaneously, pressure oil enters oil cylinder SG1 rod end through stop valve M13, promote hydraulic cylinder piston rod and open valve, the pressure oil of oil cylinder SG1 rear end is through stop valve M12, one-way valve V4, Pilot operated check valve CV1, oil cylinder rodless end solenoid valve DV1, throttle valve M5, after heat exchanger CW, get back to fuel tank YX through filter L2.
2, valve control mode
2.1 telecontrol
Control room uses under needing operated valve action situation, by control room DCS control valve action.
2.2 on-the-spot crawl operations
Use under needing execute-in-place valve event situation.Scene is pressed on electric control box panel after switch button, valve event.
2.3 on-site manual oil hydraulic pump operations
Use when motor-pump assembly cisco unity malfunction.Press switch button on electric control box panel, then operate hydraulic hand-pump SP, drive valve site action.
2.4 on-the-spot operated by handwheel
Use in control cabinet cisco unity malfunction situation at the scene.On-the-spot operated by handwheel is the independent operation of throwing off control cabinet, utilizes armstrong's patent mode to the control mode of valve direct control.
Before on-the-spot operated by handwheel, please unloading valve MV1 handle in the manifold block corresponding to respective valve is switched to open mode position.
2.5 self-insurance operations
According to user's site technique, self-insurance operation can require that combination is without Power Capacity formula (or charged positive displacement can require to order goods according to user's site technique) operation logic.
1) without Power Capacity formula:
Control room dead electricity, on-the-spot electrically dead electricity, or under field accident causes control signal to lose (out of control) situation, valve group FZx(x represents Any Digit) in the whole dead electricity of solenoid valve, positive displacement pressure accumulation accumulator:
When control system receives self-insurance control signal, the whole dead electricity of the solenoid valve in the control unit corresponding to valve site, the high pressure oil in accumulator ZL1, ZL2 enters oil cylinder rodless cavity, controls valve site and closes.
Positive displacement dead electricity fast switching logic, as shown in Figure 3.
3, technical parameter
Technical order
| Switch valve speed | 0 ~ 60 mm/s(adjustable) |
| Fast switching time | Valve port footpath ÷ switch valve speed, the fastest < 5s |
| Force moment protection | 0 ~ 20kN(can each valve adjust separately) |
| Quick closing valve buffer distance | ≤15mm |
| The linearity | <0.1% |
| Repeatability | <0.1% |
| Sensitivity | <0.1% |
Running parameter
Claims (1)
1. the multi-control positive displacement of a machine is without electric snap switch electro-hydraulic device, comprise control system, hydraulic system and actuator, described hydraulic system is modular structure, comprise fuel tank assembly YZ, main valve group ZZ, valve group FZ1, described actuator is servo cushion cylinder SG1, and servo cushion cylinder SG1 exports connection control valve, described fuel tank assembly YZ exports and connects main valve group ZZ, main valve group ZZ exports and connects servo cushion cylinder SG1 through valve group FZ1, described main valve group ZZ is provided with pressure transmitter Pt, accumulator ZL1, it is characterized in that, described fuel tank assembly YZ comprises level meter FL, fuel tank YX, air-strainer Y, return filter L2, heat exchanger CW, described main valve group ZZ comprises filter L1, throttle valve (M2, M3), one-way valve (V1, V2, V3), pilot operated compound relief valve AV1, output throttling valve (M4, M5), described valve group FZ1 comprises manual fuel tank unloading valve MV1, reduction valve AV2, oil cylinder rodless end solenoid valve DV1, Pilot operated check valve (CV1, CV2), oil cylinder rod end solenoid valve DV2, bypass one-way valve V4, valve group outlet shutoff valve (M12, M13), described fuel tank assembly YZ outlet connects through high-pressure stop valve M1 the oil hydraulic pump P controlled by motor M, oil hydraulic pump P exports the entrance point connecting main valve group ZZ filter L1, pilot operated compound relief valve AV1, main valve group ZZ filter L1 output terminal is through one-way valve V1 Bonding pressure table G, accumulator ZL1, pressure transmitter Pt, main valve group ZZ pilot operated compound relief valve AV1 flow-off one tunnel connects fuel tank assembly YZ heat exchanger CW, return filter L2, and another road is through output throttling valve M5 connection valve group FZ1 oil cylinder rod end solenoid valve DV2, described fuel tank assembly YZ exports one-way valve V2, V3 of connecting two series connection through hand pump SP, one-way valve V2, V3 common port of series connection is through output throttling valve M4 connection valve group FZ1 oil cylinder rodless end solenoid valve DV1, and one-way valve V2, V3 output terminal of two series connection is connected in parallel on the one-way valve V1 output terminal be connected with filter L1, described valve group FZ1 comprises oil inlet P 1, oil outlet A1, oil return import B1, oil return outlet T1, oil inlet P 1 is connected with oil cylinder rodless end solenoid valve DV1, oil outlet A1 is connected with servo cushion cylinder SG1 rear end, oil return import B1 connects oil cylinder rod end solenoid valve DV2 through Pilot operated check valve CV2, and oil cylinder rod end solenoid valve DV2 output terminal connects oil return outlet T1.
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| CN201310297937.5A CN103335158B (en) | 2013-07-16 | 2013-07-16 | The multi-control positive displacement of one machine is without electric snap switch electro-hydraulic device |
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| CN201310297937.5A CN103335158B (en) | 2013-07-16 | 2013-07-16 | The multi-control positive displacement of one machine is without electric snap switch electro-hydraulic device |
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| CN103335158B true CN103335158B (en) | 2015-09-02 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107940074A (en) * | 2017-12-08 | 2018-04-20 | 中国船舶重工集团公司第七〇九研究所 | A kind of marine valve hydraulic operation platform and control system |
| CN108167508A (en) * | 2017-12-25 | 2018-06-15 | 保定市新华石化设备制造有限公司 | Electro-hydraulic valve emergent cut-out apparatus |
| CN112606901A (en) * | 2020-11-19 | 2021-04-06 | 湖南中车智行科技有限公司 | Multi-cylinder hydraulic system and axle steering device |
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| CN2736624Y (en) * | 2004-08-25 | 2005-10-26 | 黄云平 | Locked type accumulator pattern automatic pressure maintaining hydraulic control slow closing valve actuator |
| CN1982766A (en) * | 2005-12-13 | 2007-06-20 | 中国神华能源股份有限公司 | Butterfly-valve controller of circulating-pump outlet |
| JP2012255434A (en) * | 2011-05-13 | 2012-12-27 | Hitachi Constr Mach Co Ltd | Hydraulic control device of construction machine |
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| CN203395337U (en) * | 2013-07-16 | 2014-01-15 | 九江市环球科技开发有限公司 | One-machine multi-control volume type nonelectrical fast switch-on and switch-off electric-hydraulic device |
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| CN2736624Y (en) * | 2004-08-25 | 2005-10-26 | 黄云平 | Locked type accumulator pattern automatic pressure maintaining hydraulic control slow closing valve actuator |
| CN1982766A (en) * | 2005-12-13 | 2007-06-20 | 中国神华能源股份有限公司 | Butterfly-valve controller of circulating-pump outlet |
| JP2012255434A (en) * | 2011-05-13 | 2012-12-27 | Hitachi Constr Mach Co Ltd | Hydraulic control device of construction machine |
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Address after: 332005 Jiangxi Province, Jiujiang Mount Lu District eco industrial city is the road of 1026 No. Patentee after: JIUJIANG HUANQIU SCIENCE AND TECHNOLOGY DEVELOPMENT CO., LTD. Address before: 332005 Jiangxi Province, Jiujiang Mount Lu District eco industrial city is the road of 1026 No. Patentee before: Jiujiang Huanqiu Science and Technology Development Co., Ltd. |