CN102607876B - Multi-path high-precision hydraulic loading and unloading servo control system suitable for model test - Google Patents
Multi-path high-precision hydraulic loading and unloading servo control system suitable for model test Download PDFInfo
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- CN102607876B CN102607876B CN201210108738.0A CN201210108738A CN102607876B CN 102607876 B CN102607876 B CN 102607876B CN 201210108738 A CN201210108738 A CN 201210108738A CN 102607876 B CN102607876 B CN 102607876B
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Abstract
The invention discloses a multi-path high-precision hydraulic loading and unloading servo control system suitable for a model test, which comprises a hydraulic station, a loading and unloading control system, a main oil path and at least one branch oil path, wherein the hydraulic station is connected with the main oil path; the system adopts a modular oil distribution path design, the main oil path adopts an electro-hydraulic proportional overflow valve to control pressure, each oil distribution path adopts a controllable electromagnetic one-way valve and a three-position four-way electromagnetic valve to realize communication and disconnection with the main oil path, the set pressure of each oil distribution path is realized, and the computer servo intelligent high-precision control of model test loading and unloading is realized.
Description
Technical field
The present invention relates to a kind of in mine, the Geotechnical Engineering technical field such as the energy, water power, traffic, national defence, relate in particular to realize in Geotechnical Engineering layer during similar model test and model high precision is added to the servo-controlled a kind of duplex high precision hydraulic pressure that is applicable to model test of unloading add unloading servo-control system.
Background technology
At present in the underground works in water power, traffic, the energy, resource and defence engineering field, increase along with depth of burial, cavern, deep rock mass is under high-ground stress condition, there are a series of new feature scientific phenomenas such as subregion breaks, large deformation, impact failure in the structure of surrounding rock of chamber, mechanical characteristic and engineering response, for these feature scientific phenomenas, to, by theoretical research, on the other hand, to study by model test means more on the one hand.Carry out model test, just must possess efficient, safety, stable, model loading system easily, the present Research of current domestic correlation model test Loading Control System is as follows:
(1) < < Wuhan hydraulic power college journal > > the 5th phase in 1992 has been introduced a kind of plane stress hydraulic loaded control system, by pressure cell, air lift pump, pipeline, tensimeter form, during test by the load or unload step by step of air pump controlled pressure.Its loading system adopts manually and controls, and cannot carry out digital pressure control loading, and the man-machine interactive operation of system loads can not be provided.
(2) < < Chinese Journal of Rock Mechanics and Engineering > > the 3rd phase in 2004 has been introduced a kind of Geotechnical Engineering Multi-functional analog experimental provision, this device applies respectively vertical and stress flatly on the relative both sides of model, it loads to adopt manually and controls, cannot carry out digital pressure control loading, the man-machine interactive operation of system loads can not be provided.
(3) the 5th phase of < < Journal of Hydraulic Engineering > > 2002 has been introduced the three-dimensional many principal stress planes load test of a kind of discretize system, mainly high-pressure gasbag, reaction thrust plate, spacing lifting jack loading device and air compressor, consists of.It loads to adopt manually and controls, and cannot carry out digital pressure control loading, and the man-machine interactive operation of system loads can not be provided.
(4) < < Chinese Journal of Rock Mechanics and Engineering > > the 21st phase in 2004 has been introduced a kind of plane strain Roadway model Loading Control System, it loads and adopts machinery to control, cannot carry out digital pressure control loading, the man-machine interactive operation of system loads can not be provided.
(5) the 4th phase of < < underground space > > 2004 has been introduced a kind of vcehicular tunnel structure and country rock Comprehensive Experiment loading system, this system adopts hydraulic jack to withstand on model test piece external load to simulate upper overlying strata soil layer gravity stress, by built-in lifting jack and the response of displacement meter excavation simulation body stress and change in displacement.It loads and adopts machinery to control, and cannot carry out digital pressure control loading, and the man-machine interactive operation of system loads can not be provided.
(6) < < civil engineering work journal > > the 12nd phase in 2005, and the application number Introduction To Cn Patent that is 200510045291.7 a kind of novel ground geomechanics model test system, it loads and adopts hydraulic machinery to control, cannot carry out digital pressure control loading, the man-machine interactive operation of system loads can not be provided.
(7) Chinese patent that application number is 200810016641.0 discloses a kind of high crustal stress genuine three-dimensional load model trial system, and it comprises hydraulic control system, high pressure loading system and counterforce device system.This hydraulic control system is artificial manual operation, cannot carry out digital pressure control loading, can not carry out the man-machine interactive operation of system loads.
(8) Chinese patent that application number is 200910020538.8 discloses a kind of device for testing model with three-dimensional gradient nonuniform loading structure, comprise the non-homogeneous charger of platform shape gradient and load counterforce device, loading the counterforce device platform shape gradient non-homogeneous charger inner with being located at it is connected, the platform shape gradient load-on module of the non-homogeneous charger of platform shape gradient is close to the surface of test model, and it does not introduce concrete pressurized control mode.
(9) Chinese patent that application number is 200910256022.3 discloses a kind of CNC pressurizing system for model test and control method thereof, and control method comprises dividing potential drop control section, pressurization operating part and visible human machine interactive interface part.Dividing potential drop control section comprises pressure sensing cell, central control unit and control output unit.Pressurization operating part comprises various by-pass valve controls and pressurizing jack.Visible human machine interactive interface partly comprises loading software systems and industrial computer system.The digitizing that implementation model loads in underground project model test, visual and intelligent.But can not realize unloading step by step, when loading accuracy is with length simultaneously, pressurize effect is undesirable.
Summary of the invention
Object of the present invention is exactly can not realize unloading step by step in order to solve in the underground project model test that prior art exists, and adds unloading precision and the undesirable problem of pressurize effect when long; Provide a kind of duplex high precision hydraulic pressure that is applicable to model test to add unloading servo-control system; Adopt modularization to divide oil circuit design, total oil circuit adopts electricity liquid ratio relief valve controlled pressure, within each minute, oil circuit adopts controllable electromagnetic retaining valve and three position four-way electromagnetic valve to realize and always UNICOM and the disconnection of oil circuit, realize the set pressure of each minute oil circuit, realized the computer servo intelligence high precision control that model test loads and unloads.
For achieving the above object, the present invention adopts following technical proposals:
A kind of duplex high precision hydraulic pressure that is applicable to model test adds unloading servo-control system, comprise Hydraulic Station, add unloading control system, total oil circuit, oil circuit is divided at least one road, Hydraulic Station is connected with total oil circuit, total oil circuit and adopt connecting line to connect for each minute between oil circuit, each road divides oil circuit to be connected with two-way cylinder with diverting valve, adding unloading control system is connected with each minute oil circuit with control Hydraulic Station, total oil circuit respectively, add unloading control system by operation computer software, Hydraulic Station, total oil circuit and each minute oil circuit are carried out to high-precision hydraulic and add unloading servocontrol.
Described Hydraulic Station comprises fuel tank, oil filter, motor, ram pump.Add unloading control system by controlling the work of the on off control Hydraulic Station of motor.
The described unloading control system that adds is man-machine interaction window, comprises the computing machine, central control unit PLC, system control operation software and the auxiliary reclay that are connected.
Described central control unit PLC gathers total road and each shunt pressure unit signal and passes to computing machine for showing and storage, according to the operating and setting of system control operation software, accept the instruction of computing machine simultaneously, the action of driving auxiliary reclay, controls electric mechanical, electrical-liquid proportional surplus valve, controllable electromagnetic retaining valve or three position four-way electromagnetic valve and produces corresponding actions.
Described total oil circuit comprises electricity-liquid proportional surplus valve of connection, total road accumulator, total road pressure unit, and total road pressure unit will detect Zong road pressure signal transmission to central control unit PLC.Electricity-liquid proportional surplus valve can accurately be controlled the pressure of total oil circuit; The total road of accumulator energy storage system, total road pressure, guarantees that pressure is steady.
Described minute oil circuit comprises controllable electromagnetic retaining valve, three position four-way electromagnetic valve, shunt accumulator and the shunt pressure unit of connection, and pressure unit is responsible for the shunt pressure signal transmission detecting to central control unit PLC along separate routes.Controllable electromagnetic retaining valve can be realized automatically controlled switching, only allows to shunt oil-feed when closure, allows the total road oil return of minute road direction when opening; Three position four-way electromagnetic valve is controlled a minute oil circuit UNICOM mode, realizes switch operation; Accumulator is responsible for storing minute oil circuit pressure along separate routes, guarantees that minute oil circuit pressure is steady.
Principle of work of the present invention: fuel tank, oil filter, motor, ram pump, electricity-liquid proportional surplus valve, accumulator He Zong road, total road pressure unit are installed on total oil circuit of the present invention successively.Electricity-liquid proportional surplus valve is responsible for accurately controlling total oil circuit pressure; Total road accumulator is responsible for storing total oil circuit pressure; Total road pressure unit is responsible for monitoring total oil circuit pressure.Adopt along separate routes modular design, controllable electromagnetic retaining valve, three position four-way electromagnetic valve, shunt accumulator, shunt pressure unit are installed on each minute oil circuit successively.Controllable electromagnetic retaining valve can be realized automatically controlled switching, allows oil return; Three position four-way electromagnetic valve is controlled a minute oil circuit UNICOM mode, realizes switch operation; Accumulator is responsible for storing minute oil circuit pressure along separate routes; Pressure unit is responsible for monitoring minute oil circuit pressure along separate routes.Computing machine, central control unit PLC, system control operation software and auxiliary reclay form human-computer interactive control operating unit.Each shunt pressure setting of system control operation software realization, demonstration and pressure add the unloading time-history curves function such as demonstration and storage in real time; Central control unit PLC by monitor total road and each along separate routes pressure control auxiliary reclay and move, thereby accurately control electricity mechanical, electrical-actions such as liquid proportional surplus valve, controllable electromagnetic retaining valve and three position four-way electromagnetic valve, until reach each set pressure along separate routes.In the course of work, when to adopting duplex high precision hydraulic pressure of the present invention to add unloading servo-control system when test model is loaded, operating personnel input each on-load pressure value along separate routes by system control operation software, system control operation software passes to central control unit PLC by operation signal by computing machine, central control unit PLC is converted to electric signal by digital signal, by auxiliary reclay, control the behavior of electric motor starting and electricity-liquid proportional surplus valve, the pressure of accurately controlling in total oil circuit reaches the force value that each is set along separate routes successively, control successively each controllable electromagnetic retaining valve closure and three position four-way electromagnetic valve along separate routes opens simultaneously, make a certain shunt Yu Zong road UNICOM, when force value that shunt pressure unit He Zong road pressure unit monitors identical and stable after, three position four-way electromagnetic valve is closed, this shunt Yu Zong road is disconnected.Each repeats above-mentioned load step along separate routes, until all shunt all reach setup pressure value, enters packing state, and motor stops.During pressurize, each shunt accumulator 11 plays the supplementary effect of pressure, has greatly extended the dwell time.
When adopting duplex high precision hydraulic pressure of the present invention to add unloading servo-control system test model is unloaded step by step, operating personnel need force value after unloading unloading along separate routes by system control operation software input, system control operation software passes to central control unit PLC by operation signal by computing machine, central control unit PLC is converted to electric signal by digital signal, by auxiliary reclay, control the behavior of electric motor starting and electricity-liquid proportional surplus valve, accurately control pressure in total oil circuit and reach successively force value after the unloading that unloading sets along separate routes, now controlling this unloading controllable electromagnetic one-way valve opens and three position four-way electromagnetic valve along separate routes opens, make this shunt Yu Zong road UNICOM, now, pressure is along separate routes greater than total road pressure, hydraulic oil along separate routes will be by three position four-way electromagnetic valve and controllable electromagnetic retaining valve refluence Xiang Zong road, when force value that shunt pressure unit He Zong road pressure unit monitors identical and stable after, controllable electromagnetic retaining valve and three position four-way electromagnetic valve are closed, this shunt Yu Zong road is disconnected, now this shunt is just successfully unloaded to setup pressure value pressurize.Therefore, the duplex high precision hydraulic pressure that is applicable to model test of invention adds the high precision that unloading servo-control system realized computer controlled automatic and loads step by step and unload, can show in real time and preserve test and add unloading overall process time-history curves, greatly simplified test loading procedure, improve loading accuracy, extended the dwell time.
Beneficial effect of the present invention:
(1) adopt computing machine and control operation software as human-computer interaction interface, by function software, set each minute oil circuit hydraulic system pressure parameter value, central control unit PLC controls hydraulic loaded and the unloading of total oil circuit and each minute oil circuit according to computer instruction, realize overload step by step and unload step by step overall process test.
(2) control operation software interface is friendly, has realized the intelligent self-servocontrol of model test loading and uninstall process, shows in real time and preserve each minute oil circuit to add unloading pressure time-history curves.
(3) this system adopts modular design, adopts the accurate servo pressure of total oil circuit to control, and controllable electromagnetic retaining valve, three position four-way electromagnetic valve are controlled each minute oil circuit Yu Zong oil circuit UNICOM successively, disconnection when minute oil circuit pressure is consistent with total oil circuit pressure; Realization is accurately controlled and is reached each minute accurate object of controlling of oil circuit pressure by total oil circuit pressure.
(4) this system is simple to operation, intuitively efficient, by minute oil circuit pressure, controls, and realizes to the non-homogeneous of test model added unloading and stablize pressurize for a long time, and total road and the along separate routes employing of accumulator have increased the dwell time, have reduced pressurize energy consumption.
(5) this system only adopts electro-hydraulic servo surplus valve on total oil circuit, greatly reduces cost, has saved fund.
(6) this system can be widely used in the layer during similar model test in the Geotechnical Engineering fields such as mine, the energy, water power, traffic, national defence, realizes model high precision is added to unloading servocontrol, have a extensive future, and remarkable in economical benefits.
Accompanying drawing explanation
Fig. 1 is that duplex high precision hydraulic pressure of the present invention adds unloading servo-control system principle schematic:
In figure, 1. fuel tank, 2. oil filter, 3. motor, 4. ram pump, 5. electricity-liquid proportional surplus valve, 6.Zong road accumulator, 7.Zong road pressure unit, 8. connecting line, 9. controllable electromagnetic retaining valve, 10. three position four-way electromagnetic valve, 11. accumulators along separate routes, 12. shunt pressure units, 13. diverting valves, 14. double-act-ing hydraulic J-Horners, 15. I oil circuits, 16. II oil circuits, 17. computing machines, 18. central control unit PLC, 19. system control operation softwares, 20 auxiliary reclays.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention will be further described.
A kind of duplex high precision hydraulic pressure that is applicable to model test adds unloading servo-control system, comprise Hydraulic Station, add unloading control system, total oil circuit, divide oil circuit, divide oil circuit to comprise I oil circuit 15, II oil circuit 16, Hydraulic Station is connected with total oil circuit, total oil circuit and I oil circuit 15, between II oil circuit 16, adopt connecting line 8 to connect, I oil circuit 15, II oil circuit 16 is connected with two-way cylinder 14 with diverting valve 13, add unloading control system respectively with control Hydraulic Station, total oil circuit and I oil circuit 15, II oil circuit 16 connects, add unloading control system by operation computer software, to Hydraulic Station, total oil circuit and I oil circuit 15, II oil circuit 16 carries out high-precision hydraulic and adds unloading servocontrol.Described Hydraulic Station comprises fuel tank 1, oil filter 2, motor 3, ram pump 4.Add unloading control system by controlling the work of the on off control Hydraulic Station of motor 3.The described unloading control system that adds is man-machine interaction window, comprises the computing machine 17, central control unit PLC18, system control operation software 19 and the auxiliary reclay 20 that are connected.Described central control unit PLC18 gathers total road and each shunt pressure unit signal and passes to computing machine for showing and storage, according to the operating and setting of system control operation software 19, accept the instruction of computing machine 17 simultaneously, drive auxiliary reclay 20 actions, control motor 2, electricity-liquid proportional surplus valve 5, controllable electromagnetic retaining valve 9 or three position four-way electromagnetic valve 10 and produce corresponding actions.Described total oil circuit comprises electricity-liquid proportional surplus valve 5 of connection, total road accumulator 6, total road pressure unit 7, and total road pressure unit 7 will detect Zong road pressure signal transmission to central control unit PLC18.Electricity-liquid proportional surplus valve 5 can accurately be controlled the pressure of total oil circuit; The total road accumulator 6 energy total road of storage system pressure, guarantee that pressure is steady.Described minute oil circuit comprises controllable electromagnetic retaining valve 9, three position four-way electromagnetic valve 10, shunt accumulator 11 and the shunt pressure unit 12 of connection, and pressure unit 12 is responsible for the shunt pressure signal transmission detecting to central control unit PLC18 along separate routes.Controllable electromagnetic retaining valve 9 can be realized automatically controlled switching, only allows to shunt oil-feed when closure, allows the total road oil return of minute road direction when opening; Three position four-way electromagnetic valve 10 is controlled a minute oil circuit UNICOM mode, realizes switch operation; Accumulator 11 is responsible for storing minute oil circuit pressure along separate routes, guarantees that minute oil circuit pressure is steady.Each road divides oil circuit to load according to test need to increase and decrease oil cylinder, guarantees that exerting oneself of each oil cylinder in same shunt is identical.Control system is man-machine interaction window, and by operation computer software, control Hydraulic Station, total oil circuit and each minute oil circuit are realized high-precision hydraulic and added the servo-controlled object of unloading.The present invention adopts modular design, can need to increase a plurality of shunt according to actual tests.Each pressure along separate routes can be controlled separately, is set as different numerical value, also can select to open or close certain along separate routes.
Although above-mentioned, by reference to the accompanying drawings the embodiment of invention is described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (1)
1. a duplex high precision hydraulic pressure that is applicable to model test adds unloading servo-control system, comprise Hydraulic Station, add unloading control system, it is characterized in that, also comprise total oil circuit, oil circuit is divided at least one road, Hydraulic Station is connected with total oil circuit, total oil circuit and adopt connecting line to connect for each minute between oil circuit, each road divides oil circuit to be connected with two-way cylinder with diverting valve, add unloading control system respectively with Hydraulic Station, total oil circuit is connected with each minute oil circuit, add unloading control system by operation computer software, to Hydraulic Station, total oil circuit and each minute oil circuit carry out high-precision hydraulic and add unloading servocontrol,
The described unloading control system that adds is man-machine interaction window, comprises the computing machine, central control unit PLC, system control operation software and the auxiliary reclay that are connected;
Described central control unit PLC gathers total road and each shunt pressure unit signal and passes to computing machine for showing and storage, according to the operating and setting of system control operation software, accept the instruction of computing machine simultaneously, the action of driving auxiliary reclay, controls electric mechanical, electrical-liquid proportional surplus valve, controllable electromagnetic retaining valve or three position four-way electromagnetic valve and produces corresponding actions;
Described total oil circuit comprises electricity-liquid proportional surplus valve of connection, total road accumulator, total road pressure unit, and total road pressure unit will detect Zong road pressure signal transmission to central control unit PLC;
Described minute oil circuit comprises controllable electromagnetic retaining valve, three position four-way electromagnetic valve, shunt accumulator and the shunt pressure unit of connection, and pressure unit is responsible for the shunt pressure signal transmission detecting to central control unit PLC along separate routes.
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| CN105865930B (en) * | 2016-04-11 | 2018-06-29 | 中南大学 | A kind of experimental rig realized in rock pore different stress paths and add off-load |
| CN108035944B (en) * | 2017-12-22 | 2023-06-02 | 山东大学 | Variable-frequency hydraulic control loading system and method |
| CN114436164B (en) * | 2021-11-24 | 2023-09-08 | 广西电网有限责任公司北海供电局 | Electric repair tower lifting leveling device and method |
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| US4967557A (en) * | 1988-01-27 | 1990-11-06 | Hitachi Construction Machinery Co., Ltd. | Control system for load-sensing hydraulic drive circuit |
| US5056312A (en) * | 1988-07-08 | 1991-10-15 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system for construction machines |
| CN101545379A (en) * | 2009-04-30 | 2009-09-30 | 徐州五洋科技有限公司 | Electrohydraulic anti-pass-through device |
| CN101726440A (en) * | 2009-12-21 | 2010-06-09 | 山东大学 | CNC pressurizing system for model test and control method thereof |
| CN202562759U (en) * | 2012-04-13 | 2012-11-28 | 山东大学 | Multi-path high-accuracy hydraulic loading/unloading servo control system suitable for model test |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4967557A (en) * | 1988-01-27 | 1990-11-06 | Hitachi Construction Machinery Co., Ltd. | Control system for load-sensing hydraulic drive circuit |
| US5056312A (en) * | 1988-07-08 | 1991-10-15 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system for construction machines |
| CN101545379A (en) * | 2009-04-30 | 2009-09-30 | 徐州五洋科技有限公司 | Electrohydraulic anti-pass-through device |
| CN101726440A (en) * | 2009-12-21 | 2010-06-09 | 山东大学 | CNC pressurizing system for model test and control method thereof |
| CN202562759U (en) * | 2012-04-13 | 2012-11-28 | 山东大学 | Multi-path high-accuracy hydraulic loading/unloading servo control system suitable for model test |
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Application publication date: 20120725 Assignee: Shandong Zhiyan Exploration Technology Co., Ltd. Assignor: Shandong University Contract record no.: 2019370000006 Denomination of invention: Multi-path high-accuracy hydraulic loading/unloading servo control system suitable for model test Granted publication date: 20141210 License type: Exclusive License Record date: 20190124 |
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