CN103616290A - Dynamic loading system for measuring dynamic characteristics of natural gas hydrate sediments - Google Patents

Dynamic loading system for measuring dynamic characteristics of natural gas hydrate sediments Download PDF

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Publication number
CN103616290A
CN103616290A CN201310578397.8A CN201310578397A CN103616290A CN 103616290 A CN103616290 A CN 103616290A CN 201310578397 A CN201310578397 A CN 201310578397A CN 103616290 A CN103616290 A CN 103616290A
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China
Prior art keywords
loading
servo
gas hydrate
measuring
hydrate sediment
Prior art date
Application number
CN201310578397.8A
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Chinese (zh)
Inventor
宋永臣
赵佳飞
刘卫国
李洋辉
陈云飞
朱一铭
吕炎
汲崇明
沈治涛
李倩倩
王莉军
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大连理工大学
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Priority to CN201310578397.8A priority Critical patent/CN103616290A/en
Publication of CN103616290A publication Critical patent/CN103616290A/en

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Abstract

The invention discloses a dynamic loading system for measuring dynamic characteristics of natural gas hydrate sediments and belongs to the technical field of measurement of mechanical characteristics of natural gas hydrate sediments. The dynamic loading system is characterized in that the system is formed by connecting a three-axis pressure chamber, a heat exchanger, an axial loading piston, a hydraulic oil source, a hydraulic actuator, a servo valve, a servo driver, a servo controller, a digital/analog (D/A) interface, a data acquisition module, an industrial personal computer, a load sensor, a displacement sensor, a strain sensor, a low-temperature control system, an internal confining pressure loading system and an external confining pressure loading system, wherein the internal confining pressure loading system, the external confining pressure loading system and the low-temperature control system can rapidly and accurately control the pressure and temperature, so that the experimental requirement of performing in-situ reaction on submarine hydrates in a lab is met. The system has the effects that the dynamic characteristics of the natural gas hydrate sediments can be tested according to the system, important kinetic parameters are provided for safety mining of the submarine natural gas hydrates, and the system is relatively low in construction cost.

Description

A kind of for measuring the moving loading system of gas hydrate sediment kinematic behavior
Technical field
The invention belongs to gas hydrate sediment measuring mechanical characteristics technical field, relate to a kind of for measuring the moving loading system of gas hydrate sediment kinematic behavior.
Background technology
Gas hydrate are as the large clean energy resource of a kind of reserves tool, and it is expected to become following important substitute energy, and its safe working has become a large study hotspot in natural gas extraction.But in exploitation of gas hydrates process, the decomposition of hydrate not only can make to reduce containing shearing strength and the load-bearing capacity of rock gas sedimentary deposit, and can affect the security of the engineerings such as seafloor structure.The decomposition of gas hydrate will increase the air content in sediment hole, thereby produce too high pore pressure, reduce sedimental consolidation strength, divide and ungird and will become a huge non-stabilized zone, if the sea bed face that the gradient is larger can form a downward slipping plane, once now be subject to the triggering of the dynamic load factor such as lifting, wave on earthquake, sea level, even only rely on the weight of sedimentary deposit self, all can cause the geologic hazards such as submarine slide and sedimentary deposit cave in.Therefore, the kinematic behavior of researching natural gas hydrate sediment before and after decomposition of hydrate or in decomposable process is significant to the safe working of hydrate.
The moving charger of three axles is the major equipment of research soil body kinematic behavior, but because gas hydrate are subject to the impact of its generation and decomposition condition and stability, therefore requirement must be done to triaxial apparatus the improvement of some necessity, and the moving loading system of servo apply hydraulic pressure is to meet requirement of experiment.
Summary of the invention
The object of this invention is to provide a kind of for measuring the moving loading system of gas hydrate sediment kinematic behavior.For analyzing containing gas hydrate sediment kinematic behavior, measure hydrate sediment before and after decomposing or in decomposable process, fatigue resistance while being subject to the dynamic loads such as earthquake, modulus at rapid deformation, dynamic stress-strain relationship, these data provide experimental basis for studying seabed and stability Frozen Ground Area gas hydrate and safe working and seafloor structure.
It is as follows that the present invention solves the problems of the technologies described above adopted technical scheme:
For measuring a moving loading system for gas hydrate sediment kinematic behavior, it is characterized in that: it mainly comprises triaxial cell, heat exchanger, axially loads piston, hydraulic oil source, hydraulic actuator, servo-valve, servo-driver, servo controller, D/A interface, data acquisition module, industrial computer, load transducer, displacement transducer, strain transducer, low-temperature control system, interior confined pressure loading system, outer confined pressure loading system; Described triaxial cell is exterior cover pipeline, inner cover cylinder, guide rail, dolly, base composition, and this structural shape can guarantee the stability, the accuracy of control, the simplicity of the accuracy of measurement and operation that axially load; Described hydraulic oil source is comprised of motor, hydraulic pump, fuel tank, oil filter, operation valve etc., is ingredient important in hydrostatic transmission and servo-control system; Described servo-valve is in servo-drive system, electric signal input to be converted to pressure that power is larger or the executive component of flow pressure signal output; Described servo controller has that resolution is high, control accuracy is high, without drift, failure rate is low, control mode without impacting the features such as conversion and fault self-diagnosis; Described low-temperature control system adopts calibration cell that low-temperature receiver is provided, and regulates the temperature of the indoor hydrate sediment sample of triaxial pressure by low-temperature circulating liquid; Described interior confined pressure loading system and described outer confined pressure loading system provide inside and outside confined pressure to respectively the indoor hydrate sediment sample of triaxial pressure.The maximum axial test force that described moving loading system can apply is 600kN, and the precision of axial test power is ± 0.5%; The maximum confined pressure that confined pressure servo loading system can apply is 30MPa, and the precision of confined pressure is ± 0.5%; Temperature controlling range is 243-298K, and temperature control precision is ± 0.1 ℃, can simulated sea bottom and the pressure and temperature of frozen soil region; The parameter of described moving loading system is: axial excitation frequency: 0-10Hz; Loading waveform is sine wave, triangular wave, square wave, direct current ripple, trapezoidal wave and their combination in any thereof; Dynamic load indicating value fluctuation degree: average load fluctuation degree: be better than ± 0.5% load amplitude fluctuation degree: be better than ± 2%, contained frequency feature and the wave characteristics of hydrate sedimentary deposit wave load, earthquake load; Described servo-valve adopts U.S. moog import servo-valve D633, and it is high-performance Direct Action Type servo-valve, and the leakage loss of pilot stage has been avoided in its Direct Action Type design, and dynamic response and system works pressure independent; Described hydraulic control system has good permanance, has avoided vibration, can obtain higher pressure, compares traditional step motor, more durable, responds faster; Described servo controller is German import servo controller, to system, provides accurate pressure, temperature and volume to control, and system adopts digital servo to control, and carrys out the test request of assurance system necessity; Motor in described servo oil sources adopts Panasonic's servomotor, and it has the advantages such as automatic adjustment, at a high speed high response, low vibration; Described servo-driver adopts PANASONIC servo-driver, and it has resonance and suppresses and control function: can make up mechanical rigidity not enough, thereby realize location at a high speed; There is closed-loop and control function: by external high-precision grating scale, form closed-loop and control, further improve system accuracy;
Described is a kind of for measuring the moving loading system of gas hydrate sediment kinematic behavior, it is characterized in that: described hydraulic actuator two ends are directly connected with described servo-valve, described hydraulic oil source respectively.
Described is a kind of for measuring the moving loading system of gas hydrate sediment kinematic behavior, it is characterized in that: described axial loading piston two ends are connected with described hydraulic actuator, described hydrate sediment sample respectively.
Described is a kind of for measuring the moving loading system of gas hydrate sediment kinematic behavior, it is characterized in that: described servo controller is connected by described servo-driver with described servo-valve.
Described is a kind of for measuring the moving loading system of gas hydrate sediment kinematic behavior, it is characterized in that: described industrial computer is connected by described D/A interface with described servo controller.
Described is a kind of for measuring the moving loading system of gas hydrate sediment kinematic behavior, it is characterized in that: between described axial loading piston and described triaxial cell, be provided with sealing ring.
Described is a kind of for measuring the moving loading system of gas hydrate sediment kinematic behavior, it is characterized in that: described axial loading piston stretches in triaxial cell, and described displacement transducer is directly connected in parallel by guide rod and described axial loading piston.
Effect of the present invention and benefit are:
1) can adopt the moving loading system of described gas hydrate sediment kinematic behavior to carry out kinematic behavior experiment to gas hydrate sediment in seabed and frozen soil region sediment;
2) described low-temperature control system can be realized controlling fast and accurately of temperature, meets sea bottom hydrate and carries out laboratory original position generation requirement of experiment, and Hydrauservo System is subject to influence of temperature change less simultaneously;
3) system cost is relatively low.
Accompanying drawing explanation
Accompanying drawing is a kind of for measuring the moving loading system figure of gas hydrate sediment kinematic behavior.
In figure: 1 axially loads piston; 2 exterior cover pipelines; 3 inner cover cylinder 4 heat exchangers; 5 hydrate sediment samples; 6 snap rings; 7 bases; 8 hydraulic actuators; 9 servo-valves; 10 servo-drivers; 11 servo controllers; 12D/A interface; 13 industrial computers; 14 data acquisition modules; 15 load transducers; 16 displacement transducers; 17 strain transducers; 18 low-temperature control systems; 19 interior confined pressure loading systems; 20 outer confined pressure loading systems; 21 hydraulic oil sources.
Embodiment
Below in conjunction with technical scheme and accompanying drawing, describe the specific embodiment of the present invention in detail.
For measuring a moving loading system figure for gas hydrate sediment kinematic behavior, its course of work is as shown in drawings:
(1) the hydrate sediment sample 5 of making is packed in triaxial cell.
(2) control the temperature of reaction of hydrate sediment sample 5, before experiment starts, first with freezer, carry out temperature control, provide suitable environment temperature, 20 ℃~room temperature of cryogenic temperature scope Shi –; Then with low-temperature control system 18, carry out temperature control, accurately control the temperature of the hydrate sediment sample 5 in three axle sample chambers.
(3) apply inside and outside confined pressure, by interior confined pressure loading system 19 and outer confined pressure loading system 20, can in triaxial apparatus, provide required inside and outside confined pressure, between 0Mpa~30Mpa.
(4) by industrial computer 13, load, displacement, these 3 experiment parameters of strain are set, as controlling parameter; Load transducer 15, displacement transducer 16; The parameter that 17 of strain transducers are accepted industrial computer 13 by data acquisition module 14 arranges.
(5) industrial computer 13 sends control signal by 12 pairs of servo controllers 11 of D/A interface simultaneously, then servo controller 11 drives servo-valve 9 to drive hydraulic actuator 8 by servo-driver 10, thereby by given signalizing activity, 21 of hydraulic oil sources provide hydraulic oil source to hydraulic actuator 8.
(6) hydraulic actuator 8 drives axially 1 pair of hydrate sediment sample of loading piston 5 to carry out compression experiment by given signal.
(7) the computer data acquisition system course of work is: hydrate sediment sample 5 is carried out to these simulating signals that load transducer 15 in compression experiment process, displacement transducer 16, strain transducer 17 receive and be transferred to and in data acquisition module 14, carry out data processing and obtain digital signal, digital signal is carried out data demonstration and storage by MCGS software after importing industrial computer 13 into.

Claims (7)

1. one kind for measuring the moving loading system of gas hydrate sediment kinematic behavior, comprise triaxial cell, heat exchanger, axially load piston, hydraulic oil source, hydraulic actuator, servo-valve, servo-driver, servo controller, D/A interface, data acquisition module, industrial computer, load transducer, displacement transducer, strain transducer, low-temperature control system, interior confined pressure loading system, outer confined pressure loading system, it is characterized in that: described triaxial cell is exterior cover pipeline, inner cover cylinder, guide rail, dolly, base composition; Described hydraulic oil source is comprised of motor, hydraulic pump, fuel tank, oil filter, operation valve; Described servo-valve is in servo-drive system, electric signal input to be converted to pressure that power is larger or the executive component of flow pressure signal output; Described servo controller carries out changing and automatic fault diagnosis without impacting of control mode; Described low-temperature control system adopts calibration cell that low-temperature receiver is provided, and regulates the temperature of the indoor hydrate sediment sample of triaxial pressure by low-temperature circulating liquid; Described interior confined pressure loading system and described outer confined pressure loading system provide confined pressure to the indoor hydrate sediment sample of triaxial pressure.
2. according to claim 1 a kind of for measuring the moving loading system of gas hydrate sediment kinematic behavior, it is characterized in that: described hydraulic actuator two ends are directly connected with described servo-valve, described hydraulic oil source respectively.
3. according to claim 1 a kind of for measuring the moving loading system of gas hydrate sediment kinematic behavior, it is characterized in that: described axial loading piston two ends are connected with described hydraulic actuator, described hydrate sediment sample respectively.
4. according to claim 1 a kind of for measuring the moving loading system of gas hydrate sediment kinematic behavior, it is characterized in that: described servo controller is connected by described servo-driver with described servo-valve.
5. according to claim 1 a kind of for measuring the moving loading system of gas hydrate sediment kinematic behavior, it is characterized in that: described industrial computer is connected by described D/A interface with described servo controller.
6. according to claim 1 a kind of for measuring the moving loading system of gas hydrate sediment kinematic behavior, it is characterized in that: between described axial loading piston and described triaxial cell, be provided with sealing ring.
7. according to claim 1 a kind of for measuring the moving loading system of gas hydrate sediment kinematic behavior, it is characterized in that: described axial loading piston stretches in triaxial cell, described displacement transducer is directly connected in parallel by guide rod and described axial loading piston.
CN201310578397.8A 2013-11-14 2013-11-14 Dynamic loading system for measuring dynamic characteristics of natural gas hydrate sediments CN103616290A (en)

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104034849A (en) * 2014-05-28 2014-09-10 山东科技大学 Testing method for mechanical property change of natural gas hydrate during decomposition
CN104155188A (en) * 2014-07-24 2014-11-19 大连理工大学 Visual natural gas hydrate sediment mechanical property testing apparatus
CN104215499A (en) * 2014-09-22 2014-12-17 青岛海洋地质研究所 Multifunctional triaxial compression testing device containing natural gas hydrate sediment and testing method thereof
CN104360021A (en) * 2014-11-06 2015-02-18 河海大学 Testing device for simulating exploitation of natural gas hydrate from deep-sea energy soil
CN104655494A (en) * 2015-02-12 2015-05-27 中国海洋石油总公司 Dynamic triaxial tester for analyzing dynamic characteristics of deepwater natural gas hydrate sediment
CN104729920A (en) * 2015-03-20 2015-06-24 中国石油大学(华东) Unconventional oil and gas reservoir rock mechanical characteristic analyzer
CN105403672A (en) * 2015-11-25 2016-03-16 中国科学院广州能源研究所 Experimental device and method for simulating stratum deformation in NGH (natural gas hydrate) exploiting process
CN105547359A (en) * 2015-12-15 2016-05-04 中国科学院力学研究所 Soil layer response monitoring system
CN106092772A (en) * 2016-06-07 2016-11-09 大连理工大学 A kind of gas hydrates core sample pressurize transfer type three-axis mounting and method
CN104215499B (en) * 2014-09-22 2017-01-04 青岛海洋地质研究所 Containing natural gas hydrate deposits thing multifunctional triaxial compression test device and experimental technique
CN108982228A (en) * 2018-07-14 2018-12-11 中国石油大学(华东) A kind of combustible ice deposit actual triaxial testing apparatus
CN109187215A (en) * 2018-09-30 2019-01-11 中国矿业大学 A kind of sea area hydrate in-situ preparation and triaxial tests pressure chamber and its application method
WO2019033472A1 (en) * 2017-08-16 2019-02-21 西南石油大学 Multi-functional testing apparatus for multi-field coupled seepage
CN109490086A (en) * 2018-12-24 2019-03-19 山东科技大学 A kind of supporting roadway surrounding rock strength test device and strength determining method
CN109490061A (en) * 2018-03-29 2019-03-19 中国科学院金属研究所 The device and test method of environment fatigue experiment are carried out under a kind of waveform control condition
CN110411842A (en) * 2019-08-01 2019-11-05 东北大学 The true triaxial experimental provision and method of crisp rock curve in post-peak area and retained strength can be obtained
WO2020119394A1 (en) * 2018-12-11 2020-06-18 大连理工大学 Ct triaxial test device for hydrate sediments

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CN102162779A (en) * 2011-01-07 2011-08-24 中国海洋石油总公司 Triaxial test device for in-situ generation and decomposition of natural gas hydrate
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JP2006266885A (en) * 2005-03-24 2006-10-05 Shimadzu Corp Air servo actuator and material tester
CN102135478A (en) * 2011-01-07 2011-07-27 中国海洋石油总公司 Triaxial test device for testing transubstantiation of sediments of gas hydrate
CN102162779A (en) * 2011-01-07 2011-08-24 中国海洋石油总公司 Triaxial test device for in-situ generation and decomposition of natural gas hydrate
CN102368157A (en) * 2011-12-02 2012-03-07 西安华科航空液压有限公司 Servo controller

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104034849A (en) * 2014-05-28 2014-09-10 山东科技大学 Testing method for mechanical property change of natural gas hydrate during decomposition
CN104155188A (en) * 2014-07-24 2014-11-19 大连理工大学 Visual natural gas hydrate sediment mechanical property testing apparatus
CN104215499A (en) * 2014-09-22 2014-12-17 青岛海洋地质研究所 Multifunctional triaxial compression testing device containing natural gas hydrate sediment and testing method thereof
CN104215499B (en) * 2014-09-22 2017-01-04 青岛海洋地质研究所 Containing natural gas hydrate deposits thing multifunctional triaxial compression test device and experimental technique
CN104360021A (en) * 2014-11-06 2015-02-18 河海大学 Testing device for simulating exploitation of natural gas hydrate from deep-sea energy soil
CN104655494A (en) * 2015-02-12 2015-05-27 中国海洋石油总公司 Dynamic triaxial tester for analyzing dynamic characteristics of deepwater natural gas hydrate sediment
CN104729920A (en) * 2015-03-20 2015-06-24 中国石油大学(华东) Unconventional oil and gas reservoir rock mechanical characteristic analyzer
CN104729920B (en) * 2015-03-20 2020-06-30 中国石油大学(华东) Unconventional oil and gas reservoir rock mechanical characteristic analyzer
CN105403672A (en) * 2015-11-25 2016-03-16 中国科学院广州能源研究所 Experimental device and method for simulating stratum deformation in NGH (natural gas hydrate) exploiting process
CN105547359A (en) * 2015-12-15 2016-05-04 中国科学院力学研究所 Soil layer response monitoring system
CN105547359B (en) * 2015-12-15 2018-03-27 中国科学院力学研究所 A kind of soil layer responds monitoring system
CN106092772B (en) * 2016-06-07 2018-11-09 大连理工大学 A kind of gas hydrates core sample pressurize transfer type three-axis mounting and method
CN106092772A (en) * 2016-06-07 2016-11-09 大连理工大学 A kind of gas hydrates core sample pressurize transfer type three-axis mounting and method
WO2019033472A1 (en) * 2017-08-16 2019-02-21 西南石油大学 Multi-functional testing apparatus for multi-field coupled seepage
US10801942B2 (en) 2017-08-16 2020-10-13 Southwest Petroleum University Multi-functional multi-field coupling seepage experiment device and testing method thereof
CN109490061A (en) * 2018-03-29 2019-03-19 中国科学院金属研究所 The device and test method of environment fatigue experiment are carried out under a kind of waveform control condition
CN108982228A (en) * 2018-07-14 2018-12-11 中国石油大学(华东) A kind of combustible ice deposit actual triaxial testing apparatus
CN109187215A (en) * 2018-09-30 2019-01-11 中国矿业大学 A kind of sea area hydrate in-situ preparation and triaxial tests pressure chamber and its application method
WO2020119394A1 (en) * 2018-12-11 2020-06-18 大连理工大学 Ct triaxial test device for hydrate sediments
CN109490086A (en) * 2018-12-24 2019-03-19 山东科技大学 A kind of supporting roadway surrounding rock strength test device and strength determining method
CN110411842A (en) * 2019-08-01 2019-11-05 东北大学 The true triaxial experimental provision and method of crisp rock curve in post-peak area and retained strength can be obtained

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