CN107271256B - A kind of analog temperature gradient fields and automatic loading device and its application method - Google Patents
A kind of analog temperature gradient fields and automatic loading device and its application method Download PDFInfo
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- CN107271256B CN107271256B CN201710376566.8A CN201710376566A CN107271256B CN 107271256 B CN107271256 B CN 107271256B CN 201710376566 A CN201710376566 A CN 201710376566A CN 107271256 B CN107271256 B CN 107271256B
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 46
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 238000005057 refrigeration Methods 0.000 claims abstract description 29
- 239000007787 solid Substances 0.000 claims abstract description 15
- 239000002689 soil Substances 0.000 claims description 24
- 238000004088 simulation Methods 0.000 claims description 6
- 230000009123 feedback regulation Effects 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 210000004556 brain Anatomy 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 230000008014 freezing Effects 0.000 claims 1
- 238000007710 freezing Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 12
- 238000002474 experimental method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011173 large scale experimental method Methods 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of analog temperature gradient fields and automatic loading devices, including baking oven, heating system, refrigeration system, temperature sensor, pressure sensor, servo-pressing machine, more gradient pressure feedways, solid steel tube, pressurized steel disc and computerized control system, heating system and refrigeration system are evenly distributed on baking oven inner wall, temperature sensor and pressure sensor are embedded in oven interior, more gradient pressure feedways on servo-pressing machine top are transferred the pressure in the sample in baking oven by solid steel tube and pressurized steel disc, computerized control system respectively with heating system, refrigeration system, temperature sensor, pressure sensor, servo-pressing machine, more gradient pressure feedway electrical connections.The invention belongs to geotechnical engineering modeling techniques field, present apparatus structure is simple, easy for installation, at low cost, highly reliable, native under the conditions of the various complex engineerings of analog physical condition.
Description
Technical field
The invention belongs to geotechnical engineering modeling techniques fields, in particular to a kind of analog temperature gradient fields to add with automatic
It carries and sets and its application method.
Background technique
As the increasingly developed and strategy to develop western regions of China's underground space is implemented in full, China will be constantly for many years
Frozen Ground Area carries out the construction of the Important Projects facilities such as railway, highway, petroleum pipeline, optical cable, water conservancy.Cold regions engineering builds meeting
Cause lower part ever-frozen ground to melt sedimentation, seriously affects the stability and normal operation of engineering.Newly-built cold regions engineering is faced with
Temperature close to 0 DEG C high temperature, high soil containing frost be ever-frozen ground, global warming and many years that volume ice content is more than 30%
Many problems that frozen soil is constantly degenerated.The construction of underground structure is more and more, as depth increases, native mechanical characteristic and temperature
Significant changes can occur.Often it is difficult to control continually changing temperature and stress simultaneously when being tested in laboratory at present
The two conditions want very high cost large-scale experiment room possesses the simulation for realizing approximate condition.
Summary of the invention
To solve above-mentioned existing problem, the present invention provides one kind can be used for geotechnical engineering simulation soil stress and temperature mould
The experimental rig and test method of type test, the device is by combining servo-pressing machine and temperature control system, then
Uniformly regulated and controled by computerized control system, realizes the simulation of various complex stress conditions and temperature.The present apparatus fully achieves
Self adjusting at any time for stress and temperature, facilitates look at influence of the various factors for resistance to shear of soil, real for the various soil bodys
It tests to probe into and provides more convenient instrument.Cost is relatively low for this laboratory apparatus simultaneously, and can satisfy needed for most of experiments
The precision wanted, cost performance are very high.
The technical solution adopted by the present invention is as follows: a kind of analog temperature gradient fields of the present invention and automatic loading device, it is wrapped
Include baking oven, heating system, refrigeration system, temperature sensor, pressure sensor, servo-pressing machine, more gradient pressure feedways,
Solid steel tube, pressurized steel disc and computerized control system, the heating system and refrigeration system are evenly distributed on baking oven inner wall,
Temperature sensor and pressure sensor are embedded in oven interior, and servo-pressing machine is set to below baking oven, and servo-pressing machine top is set
There are more gradient pressure feedways, solid steel tube is set to below more gradient pressure feedways, and pressurized steel disc is set to baking oven
Above interior sample, more gradient pressure feedways on servo-pressing machine top will be pressed by solid steel tube and pressurized steel disc
Power is transmitted in the sample in baking oven, and computerized control system is passed with heating system, refrigeration system, temperature sensor, pressure respectively
Sensor, servo-pressing machine, the electrical connection of more gradient pressure feedways.
Further, the heating system and refrigeration system are annular setting, the heating system and refrigeration system point
Pipe and refrigerator pipes She You not be heated, heating pipe and refrigerator pipes are all made of organic glass Steel material and are made.Heating system and refrigeration system
Two systems of uniting work independently, and are independent of each other, are uniformly controlled by computerized control system.
Further, the heating system and refrigeration system alternate arrangement with baking oven height, respectively with external heat
Exchange system constitutes circulation loop, and heating pipe and refrigeration pipe diameter are 10mm, heating pipe and the mutual parallel distance of refrigerator pipes
Between 8mm-10mm, respectively to play one's part to the full, reduction influences each other.
Further, the inner wall of the baking oven is equipped with groove, and heating pipe and refrigerator pipes are tightly attached in groove respectively, groove
Surface is equipped with insulation material layer.The feature of heating system and refrigeration system maximum is attached to each loop system on baking oven inner wall
Cold pipe or heating pipe are all individually present and run, and are responsible for conciliation by multiple controllers respectively, thus can be according to setting
Temperature gradient parameter adjust refrigerator pipes at different depth or heating pipe work respectively, to efficiently rapidly obtain corresponding
Temperature gradient.
Further, the temperature sensor and pressure sensor pass through data collecting instrument and computerized control system phase respectively
Connection.
AC power source used in this programme uses the adjustable ac source of power frequency way of full-wave rectification.
A kind of application method of analog temperature gradient fields and automatic loading device, includes the following steps:
(1) model that will be studied is put into baking oven first；
(2) temperature sensor is arranged in from bottom to top in model outer wall and soil sample, and is acquired by conducting wire and data
Instrument is connected, and data collecting instrument, which acquire, to be passed to computerized control system after data and handled, reflection soil each position temperature, so as to
In timely adjustment；
(3) pressure sensor is arranged in from bottom to top in model outer wall and soil sample, and is acquired by conducting wire and data
Instrument is connected, and data collecting instrument, which acquire, to be passed to computerized control system after data and handled, reflection soil each position stress state,
In order to adjust in time；
(4) by soil sample top flatten and at an upper portion thereof uniformly placement pressurized steel disc, servo-pressing machine top it is more
Gradient pressure feedway is transferred the pressure in the sample in baking oven by solid steel tube and pressurized steel disc, makes soil sample
Local uniform stress, more gradient pressurizations may be implemented in existing improved servo-pressing machine, so that on each pressurized steel disc
By the pressure of different numerical value, and can be adjusted at any time by computer, it thus can be with soil complicated under simulating natural condition
Stress state；
(5) heating system and refrigeration system are started by computerized control system, is made in baking oven by two system coordinations work
Temperature reaches preset temperature, while starting servo-pressing machine and setting pressure parameter, and temperature sensor and pressure sensor are anti-
Feedforward information, computerized control system receive information and control the progress feedback regulation of two systems, and two systems work independently simultaneously, all processes
It is automatically controlled by computerized control system, to realize the temperature and stress simulation in baking oven.
What the present invention obtained using the above scheme has the beneficial effect that:
(1) it can be widely applied in the model test in geotechnical engineering field and Other Engineering field, by adjusting servo
Press machine and refrigerating and heating systems provide a kind of new way for soil stress complicated in model test and temperature condition simulation；
(2) improved servo-pressing machine has multiple pressure supply units, is transmitted pressure by solid steel tube and steel disc
To the part of experiment soil, more complex stress state can be simulated；
(3) it is uniformly alternately distributed the refrigerating and heating systems autonomous working in oven interior, refrigerator pipes and heating pipe are placed in
In groove, boundary condition native in test will not influence；
(4) physical state for being reflected each position in soil in time using pressure sensor and temperature sensor, is solved well
Determined the shortcomings that pressurization and temperature control are blindly carried out in traditional experiment and sensor difficult to install the defects of；
(5) servo-pressing machine is adjusted by computer controller and temperature control system is run, pressure and temperature is by adjusting electric current
Size adjust rapidly, substantially reduce due to the feedback regulation time it is long caused by test error.
Detailed description of the invention
Fig. 1 is the schematic view of the front view of analog temperature gradient fields and automatic loading device of the present invention；
Fig. 2 is the refrigerator pipes and heating pipe distribution signal inside analog temperature gradient fields of the present invention and automatic loading device
Figure.
Wherein, 1, baking oven, 2, heating system and refrigeration system, 3, temperature sensor, 4, pressure sensor, 5, servo pressure
Machine, 6, more gradient pressure feedways, 7, solid steel tube, 8, pressurized steel disc, 9, computerized control system, 10, heating pipe,
11, refrigerator pipes.
Specific embodiment
In conjunction with attached drawing, the present invention is described in further details.
As illustrated in fig. 1 and 2, analog temperature gradient fields of the present invention and automatic loading device, it includes baking oven 1, heating system
With refrigeration system 2, temperature sensor 3, pressure sensor 4, servo-pressing machine 5, more gradient pressure feedways 6, solid steel tube
7, pressurized steel disc 8 and computerized control system 9, the heating system and refrigeration system 2 are evenly distributed on 1 inner wall of baking oven, temperature
Degree sensor 3 and pressure sensor 4 are embedded in inside baking oven 1, and servo-pressing machine 5 is set to below baking oven 1, on servo-pressing machine 5
Portion is equipped with more gradient pressure feedways 6, and solid steel tube 7 is set to more 6 lower sections of gradient pressure feedway, pressurized steel disc 8
Above the sample in baking oven 1, more gradient pressure feedways 6 on 5 top of servo-pressing machine pass through solid steel tube 7 and part
Pressurization steel disc 8 transfer the pressure in the sample in baking oven 1, computerized control system 9 respectively with heating system, refrigeration system, temperature
Spend sensor 3, pressure sensor 4, servo-pressing machine 5, the electrical connection of more gradient pressure feedways 6.
Wherein, heating system and refrigeration system 2 are annular setting, and heating system and refrigeration system 2 are respectively equipped with heating
Pipe 10 and refrigerator pipes 11, heat pipe 10 and refrigerator pipes 11 are all made of organic glass Steel material and are made.Heating system and refrigeration system 2
Arrangement is alternateed with 1 height of baking oven, constitutes circulation loop with external heat exchange system respectively, heats pipe 10 and refrigerator pipes 11
Diameter is 10mm, heats pipe 10 and the mutual parallel distance of refrigerator pipes 11 between 8mm-10mm.The inner wall of baking oven 1 is equipped with
Groove, heats pipe 10 and refrigerator pipes 11 are tightly attached in groove respectively, and groove surfaces are equipped with insulation material layer.3 He of temperature sensor
Pressure sensor 4 is connected by data collecting instrument with computerized control system 9 respectively.
When specifically used, first soil sample is attached in baking oven 1, reserved one can put down the hole of model, by temperature sensor 3
It is arranged in corresponding position as requested with pressure sensor 4, places model and then bankets and 1 top of baking oven is flattened into compacting,
Next pressurized steel disc 8 is uniformly put into soil sample top, and starts servo-pressing machine 5 and makes solid steel tube 7 and part
Pressurization steel disc 8 is exactly in contact with, and then embedding temperature sensor 3 and pressure sensor 4 are connected with data collecting instrument, data
Acquisition Instrument is connected with computerized control system 9, checks that whole device various pieces open after confirming that each step and instrument state are errorless
Dynamic 9 power supply of computerized control system, is arranged required pressure and temperature gradient, and then first starting servo-pressing machine 5 reaches pressure
Setting value restarts refrigeration and heating system 2, so that temperature is maintained at the temperature gradient conditions set in baking oven 1, mould at this time
Draft experiment condition has been formed.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (5)
1. a kind of analog temperature gradient fields and automatic loading device, it is characterised in that: it includes baking oven, heating system, refrigeration system
System, temperature sensor, pressure sensor, servo-pressing machine, more gradient pressure feedways, solid steel tube, pressurized steel disc
And computerized control system, the heating system and refrigeration system are evenly distributed on baking oven inner wall, the heating system and refrigeration system
System is annular setting, and the heating system and refrigeration system are respectively equipped with heating pipe and refrigerator pipes, and heating pipe and refrigerator pipes are equal
It is made of organic glass Steel material, each of is attached on baking oven inner wall annular refrigerator pipes in heating system and refrigeration system
Or heating pipe is all individually present and runs, and is responsible for conciliation, temperature sensor and pressure sensor by multiple controllers respectively
It is embedded in oven interior, servo-pressing machine is set to below baking oven, and servo-pressing machine top is equipped with more gradient pressure feedways, real
Heart steel pipe is set to below more gradient pressure feedways, and pressurized steel disc is set to above the sample in baking oven, servo-pressing machine
More gradient pressure feedways on top are transferred the pressure in the sample in baking oven by solid steel tube and pressurized steel disc,
Pressure on each pressurized steel disc by different numerical value, and can be adjusted at any time by computer, computerized control system point
It is not electrically connected with heating system, refrigeration system, temperature sensor, pressure sensor, servo-pressing machine, more gradient pressure feedways
It connects.
2. a kind of analog temperature gradient fields and automatic loading device according to right 1, it is characterised in that: the heating system
With refrigeration system with baking oven height alternate arrangement, respectively with external heat exchange system constitute circulation loop, heating pipe with
Pipe diameter of freezing is 10mm, and heating pipe and the mutual parallel distance of refrigerator pipes are between 8mm-10mm.
3. a kind of analog temperature gradient fields and automatic loading device according to right 1, it is characterised in that: the baking oven it is interior
Wall is equipped with groove, and heating pipe and refrigerator pipes are tightly attached in groove respectively, and groove surfaces are equipped with insulation material layer.
4. a kind of analog temperature gradient fields according to claim 1 and automatic loading device, it is characterised in that: the temperature
Sensor and pressure sensor pass through data collecting instrument respectively and are connected with computerized control system.
5. the application method of -4 any one analog temperature gradient fields and automatic loading device, feature exist according to claim 1
In including the following steps:
(1) model that will be studied is put into baking oven first；
(2) temperature sensor is arranged in from bottom to top in model outer wall and soil sample, and passes through conducting wire and data collecting instrument phase
Even, data collecting instrument, which acquire, passes to computerized control system after data and is handled, reflection soil each position temperature, in order to and
When adjust；
(3) pressure sensor is arranged in from bottom to top in model outer wall and soil sample, and passes through conducting wire and data collecting instrument phase
Even, data collecting instrument, which acquire, passes to computerized control system after data and is handled, reflection soil each position stress state, so as to
In timely adjustment；
(4) soil sample top is flattened and uniformly places pressurized steel disc, more gradients on servo-pressing machine top at an upper portion thereof
Pressure supply unit is transferred the pressure in the sample in baking oven by solid steel tube and pressurized steel disc, keeps soil sample local
The pressurization of more gradients may be implemented in uniform stressed, existing improved servo-pressing machine so that on each pressurized steel disc by
The pressure of different numerical value, and can be adjusted at any time by computer, it thus can be with soil stress complicated under simulating natural condition
State；
(5) heating system and refrigeration system are started by computerized control system, oven temperature is made by two system coordinations work
Reach preset temperature, while starting servo-pressing machine and setting pressure parameter, temperature sensor and pressure sensor feedback letter
Breath, computerized control system receive information and control the progress feedback regulation of two systems, and two systems work independently simultaneously, and all processes are by electricity
Brain control system automatically controls, to realize the temperature and stress simulation in baking oven.
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| CN201710376566.8A CN107271256B (en) | 2017-05-25 | 2017-05-25 | A kind of analog temperature gradient fields and automatic loading device and its application method |
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| CN201710376566.8A CN107271256B (en) | 2017-05-25 | 2017-05-25 | A kind of analog temperature gradient fields and automatic loading device and its application method |
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| CN107271256B true CN107271256B (en) | 2019-08-30 |
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| CN109211668B (en) * | 2018-09-20 | 2021-07-16 | 中国矿业大学 | Coal-rock combination mining unloading test device and method |
| CN109856034B (en) * | 2019-03-26 | 2021-09-14 | 哈尔滨工业大学 | Experimental system for directly measuring permeability characteristics of frozen soil |
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| KR20120054428A (en) * | 2010-11-19 | 2012-05-30 | 한국건설기술연구원 | Measuring apparatus of frost heaving pressure for earth and sand |
| CN103383325A (en) * | 2013-07-18 | 2013-11-06 | 河海大学 | Testing device for simulating concrete test piece hydraulic fracture under multi-field coupling condition |
| CN104819926A (en) * | 2015-05-20 | 2015-08-05 | 河海大学 | Multi-field coupling penetration test device and method for cracked rock |
| CN105300843A (en) * | 2015-11-12 | 2016-02-03 | 南开大学 | Column apparatus capable of simulating pollutant migration under different hydrogeological conditions |
| CN105954118A (en) * | 2016-05-30 | 2016-09-21 | 山东大学 | Test apparatus and test method for testing shear strength index of soil body through triaxial test |
| CN106320389A (en) * | 2016-07-08 | 2017-01-11 | 南京林业大学 | Freezing force determination test device and determination method thereof |
| CN206114568U (en) * | 2016-09-21 | 2017-04-19 | 中国地质大学（武汉） | Rock thermophysical parameters test system under high temperature high pressure |
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2017
- 2017-05-25 CN CN201710376566.8A patent/CN107271256B/en not_active Expired - Fee Related
Patent Citations (7)
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| KR20120054428A (en) * | 2010-11-19 | 2012-05-30 | 한국건설기술연구원 | Measuring apparatus of frost heaving pressure for earth and sand |
| CN103383325A (en) * | 2013-07-18 | 2013-11-06 | 河海大学 | Testing device for simulating concrete test piece hydraulic fracture under multi-field coupling condition |
| CN104819926A (en) * | 2015-05-20 | 2015-08-05 | 河海大学 | Multi-field coupling penetration test device and method for cracked rock |
| CN105300843A (en) * | 2015-11-12 | 2016-02-03 | 南开大学 | Column apparatus capable of simulating pollutant migration under different hydrogeological conditions |
| CN105954118A (en) * | 2016-05-30 | 2016-09-21 | 山东大学 | Test apparatus and test method for testing shear strength index of soil body through triaxial test |
| CN106320389A (en) * | 2016-07-08 | 2017-01-11 | 南京林业大学 | Freezing force determination test device and determination method thereof |
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| 岩土热响应试验在土壤源热泵***设计中的应用;郝小充等;《制冷学报》;20111231;第32卷(第6期);第44-48页 * |
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