CN106769434A - A kind of Volume Changes analyzer - Google Patents
A kind of Volume Changes analyzer Download PDFInfo
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- CN106769434A CN106769434A CN201710022794.5A CN201710022794A CN106769434A CN 106769434 A CN106769434 A CN 106769434A CN 201710022794 A CN201710022794 A CN 201710022794A CN 106769434 A CN106769434 A CN 106769434A
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- water storage
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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
- G01N3/06—Special adaptations of indicating or recording means
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of Volume Changes analyzer, it is mainly used in the accurate measurement sample population product variable quantity in soil test.Described Volume Changes analyzer mainly includes cross box (1), top room (2) and digital display meter (3), the pipeline for changing box house by the pole changer (21) on rotary volume change detection instrument cross box (1) is connected, and then change the setting of Volume Changes analyzer top room (2), and using the change in displacement of the piston (17) inside digital display meter (3) measurement Volume Changes analyzer, conversion obtains volume of sample changing value.Volume Changes analyzer reasonable in design of the present invention, it is simple to operate, have a wide range of application, measuring accuracy is high, is capable of achieving the accurate measurement of sample population product change during soil test, can be used in combination with various testing equipments, stability is high, long service life.
Description
Technical field
The present invention relates to a kind of Volume Changes analyzer, more particularly to can accurately be surveyed during a kind of unsaturated soil testing
The device of amount sample population product change, can be used in combination, such as unsaturated soil triaxial apparatus with various earthwork test Instruments.
Background technology
In soil test, the Volume Changes of sample reflect the compression of the soil body, cut the physics spy such as swollen to a certain extent
Property.According to the aqueous situation of soil, the soil body can be divided into two kinds, i.e. saturated soil and unsaturated soil；For saturation soil sample, process of the test
The variable quantity of middle soil body volume is equal to the displacement of sample, generally becomes pipe using body or backpressure controllers are measured, the former
It is vulnerable to the influence of external environment and human factor etc., certainty of measurement is low.
For unsaturated soil sample, due to including solid phase, gas phase and liquid phase in the soil body, wherein gas phase and liquid phase is to press
Contracting, therefore the volume change of the soil body is not only relevant with liquid phase in process of the test, it is also relevant with gas phase, can not now use upper
The method of stating carries out the measurement of volume of sample change.Generally, its measuring method can be divided into following several：One is measurement sample neighboring liquid
The Volume Changes of body are measured indirectly, and two is the Volume Changes for measuring gas phase and liquid phase in sample respectively, and three is using high definition figure
The Volume Changes of sample are directly measured as advanced technologies such as treatment.Be difficult to operate due to latter two method, high cost, certainty of measurement
The problems such as controlling is difficult to, first method is widely used.
And first method is directed to, liquid around pipe measurement sample is become using the body being connected with balancing gate pit more than existing instrument
Body Volume Changes, or obtain the volume of sample indirectly using methods such as the double pressure chamber structure measurement interior room SEA LEVEL VARIATIONs of communicate-type
Change.Generally, the former is vulnerable to the influence of environment temperature, and certainty of measurement is difficult to control to, and is difficult to generate continuous data；Then
Person is then larger due to interior chamber size, and the liquid SEA LEVEL VARIATION that sample change causes is difficult to measure, and test accuracy is relatively low, it is difficult to reach
Test requirements document.
The content of the invention
In view of the above-mentioned problems existing in the prior art, it is an object of the invention to provide a kind of high precision, practical geotechnique
The Volume Changes analyzer of experiment, is connected by the ambient pressure source with earthwork test Instrument, measurement voltage stabilizing during because
The pressure source volume of fluid that volume of sample changes and compensates, and then the accurate cumulative volume change for measuring sample in process of the test.
To achieve the above object, the present invention is adopted the following technical scheme that：
A kind of Volume Changes analyzer, it is characterised in that it include the top room that is connected with cross box of cross box and with push up room
Connected digital display meter；
Described cross box includes casing, lower margin, controlling switch, pole changer and side tube-wall pipeline interface, described case
The circular hole for installing top room is offered on the top board of body, described lower margin is fixed on the lower shoe of casing, controlling switch and
Pole changer is respectively arranged on the panel of casing, by the controlling switch steering different with pole changer, is capable of achieving pipeline
Different connected modes；Two described side tube-wall pipeline interfaces be located at casing two sides on, by water flowing pipeline respectively with soil
The ambient pressure source of work test apparatus is connected with balancing gate pit；
Described top room includes lower capping, cantilever lever, digital display meter fixture, capping, the first connector, the second connector, the
One exhaust cap, second row gas cap, connecting rod, the fast interface of the first pipeline, the fast interface of the second pipeline, the first water storage cavity, second
Water storage cavity, side tube-wall and piston；
Described lower capping and capping is individually fixed in the two ends of side tube-wall, and is connected by connecting rod, and connecting rod two ends are adopted
It is fixed with nut；
Described capping upper surface and lower capping lower surface is separately installed with the first connector and the second connector, first row
Gas cap and second row gas cap are separately fixed on the first connector and the second connector；
Described piston is located inside side tube-wall, and the upper and lower part of piston is placed with the first water storage cavity and second respectively
Water storage cavity, the first water storage cavity is sealingly fastened on piston by fillister head screw, and the second water storage cavity passes through socket cap spiral shell
Nail is sealingly fastened in lower capping；
Described capping is internally provided with the first appearance aquaporin of L-type, and first appearance aquaporin one end of L-type is connected with first
Head be connected, the other end is connected with the fast interface of the first pipeline, L-type first appearance aquaporin L-type corner and
First water storage cavity body phase is connected；
Described lower capping is internally provided with the second appearance aquaporin of L-type, and second appearance aquaporin one end of L-type connects with second
Joint is connected, and the other end is connected with the fast interface of the second pipeline, and the second of L-type holds corner of the aquaporin in L-type
Connected with the second water storage cavity body phase.
Preferably, above-described Volume Changes analyzer, the described fast interface of the first pipeline and the second pipe
The fast interface of line is connected with the water flowing pipeline in cross box respectively.
Preferably, above-described Volume Changes analyzer, leaves along short transverse ellipse on described side tube-wall
Circular channel, cantilever lever is fixed between piston and the second water storage cavity through the oval-shaped passageway on side tube-wall.
Preferably, above-described Volume Changes analyzer, one end of digital display meter fixture is fixed under capping
Edge, digital display meter is fixed through the circular hole on digital display meter fixture with fixed screw, and the gauge head of digital display meter connects with cantilever
Touch.
Preferably, above-described Volume Changes analyzer, the range of described digital display meter is 25mm.
Preferably, above-described Volume Changes analyzer, the first described water storage cavity and the second water storage cavity
The maximum pressure-bearing of body is 3MPa.
Preferably, above-described cross box is mainly changed by the controlling switch and pole changer on rotating box
Become the pipeline connection of box house, realize the change in top chamber interior piston movement direction, and using digital display meter measurement top chamber interior
The mobile displacement of piston, and then it is calculated the Volume Changes of sample.
Volume Changes analyzer of the present invention is mainly and is connected with the ambient pressure source in earthwork test Instrument, leads to
Cross during measurement voltage stabilizing the pressure source volume of fluid that compensate because volume of sample changes, and then accurately measure process of the test
The cumulative volume change of sample.
The operate with method of the Volume Changes analyzer that the present invention is provided：It is comprised the following steps：
Step one：Pipeline is connected, and will be attached between Volume Changes analyzer and ambient pressure source and balancing gate pit, is changed
One side tube-wall pipeline interface of case is connected by water flowing pipeline with the ambient pressure source in experiment, another side tube-wall pipeline
Interface is connected by water flowing pipeline with balancing gate pit；
Step 2：Water filling is vented, and the top room to Volume Changes analyzer carries out water filling exhaust, rotary control switch and steering
Switch, makes two switches be respectively directed to the direction in " Volume Changes " direction and " flowing up ", first row gas cap is opened, using pressure
Power voltage input to water filling in the second water storage cavity body, until cantilever lever be moved to top edge 8 apart from side tube-wall ellipse hole~
10mm, stops to water filling in the second water storage cavity body；Rotation pole changer, makes it point to " flowing downward " direction, pressure control source
Interior liquid is injected in the first water storage cavity body, and suitably rocks top room, until being closed without gas discharge in the first water storage cavity body
First row gas cap, and top room is inverted；Second row gas cap is opened, using pressure control source to water filling in the first water storage cavity body, directly
The centre position for being moved to side tube-wall ellipse hole to cantilever lever, pole changer is rotated, it is pointed to " flowing up "
Direction, now pressure source suitably rocks top room to water filling in the second water storage cavity body, until the gas row in the second water storage cavity body
Untill complete, second row gas cap is tightened；Aforesaid operations are repeated 3-5 times, untill being discharged without bubble；
Step 3：Start experiment, controlling switch and pole changer are rotated to " Volume Changes " direction and " to upstream respectively
It is dynamic " direction, now the reading of digital display meter is h1, complete the preparation before experiment, you can start experiment；According to ambient pressure
Mechanism, whole experiment can be divided into ambient pressure and apply stage and ambient pressure voltage stabilizing stage：
Ambient pressure applies the stage：To reach set ambient pressure value in experimental design, ambient pressure source will be to
Liquid is injected in two water storage cavitys, applies pressure, now, the second water storage cavity volume expansion, promotion piston rise, and extrude the first water storage
In liquid inlet pressure room in cavity, the first water storage cavity is set to be equal to in the pressure in balancing gate pit and the second water storage cavity body,
And then reach set target ambient pressure value σ3；Meanwhile, in piston uphill process, drive cantilever lever to move upwards, digital display
The shift value that table measurement is obtained changes, and reading is h1；
The ambient pressure voltage stabilizing stage：Due to the effect of ambient pressure and axial compressive force, sample will occur compression, surrounding
Pressure is difficult to maintain stable state, the pressure value in corresponding Volume Changes analyzer the first water storage cavity and the second water storage cavity body
Change, by servo feedback, ambient pressure source will be to liquid be injected in the second water storage cavity, piston rises, extruding the
One water storage cavity, makes the first water storage cavity, the second water storage cavity and balancing gate pit maintain target ambient pressure value σ3, now, first
The variable quantity of liquid is the total variation of volume of sample in water storage cavity or the second water storage cavity body, and the reading of digital display meter is h2,
The sectional area of water storage cavity is s1, the total variation for being calculated volume of sample is Δ V=s1·|h1-h2|；
When pole changer is rotated to " flowing downward " direction, the liquid in ambient pressure source will into the first water storage cavity,
Piston declines, and extrudes the second water storage cavity, ambient pressure is remained constant.
It is compared with the prior art, the beneficial effects of the invention are as follows：
The Volume Changes analyzer that the present invention is provided, reasonable in design can overcome prior art to be influenceed by environmental change
Greatly, the low defect of measurement result accuracy.
The present invention uses closed structure, can avoid influence of the liquid evaporation to cubing precision in process of the test, can be big
The big accuracy for improving volume of sample measure of the change；
The present invention uses digital display meter, and certainty of measurement is high, can be connected with data collecting system, and achievable data connect automatically
Continuous record and storage.
Brief description of the drawings
Fig. 1 is Volume Changes analyzer structure chart of the present invention.
Fig. 2 is Volume Changes analyzer top cell structure figure of the present invention.
Fig. 3 is Volume Changes analyzer top room of the present invention profile.
Fig. 4 is Volume Changes analyzer cross box structure chart of the present invention.
Specific embodiment
The present invention is further illustrated with reference to embodiment and its accompanying drawing.
Embodiment 1
As shown in Figures 1 to 4, a kind of Volume Changes analyzer, it include the top room 2 that is connected with cross box 1 of cross box 1 and
The digital display meter 3 being connected with top room 2；
Described cross box 1 includes casing 18, lower margin 19, controlling switch 20, pole changer 21 and side tube-wall pipeline interface
22, the circular hole for installing top room 2 is offered on the top board of described casing 18, described lower margin 19 is fixed under casing 18
On base plate, controlling switch 20 and pole changer 21 are respectively arranged on the panel of casing 18, are opened by controlling switch 20 and steering
21 different steerings are closed, the different connected modes of pipeline are capable of achieving；Two described side tube-wall pipeline interfaces 22 are located at casing 18
Two sides on, be connected with the ambient pressure source of earthwork test Instrument and balancing gate pit respectively by water flowing pipeline；
Described top room 2 includes lower capping 4, cantilever lever 5, digital display meter fixture 6, the 8, first connector 10-1 of capping, second
Connector 10-2, first row gas cap 11-1, second row gas cap 11-2, connecting rod 12, the fast interface 13-1 of the first pipeline, the second pipeline
Fast interface 13-2, the first water storage cavity 14-1, the second water storage cavity 14-2, side tube-wall 16 and piston 17；
Described lower capping 4 and capping 8 is individually fixed in the two ends of side tube-wall 16, and is connected by connecting rod 12, connecting rod
12 two ends are fixed using nut 9；
The described upper surface of capping 8 and the lower lower surface of capping 4 is separately installed with the first connector 10-1 and the second connector
10-2, first row gas cap 11-1 and second row gas cap 11-2 are separately fixed at the first connector 10-1 and the second connector 10-2
On；
Described piston 17 is located inside side tube-wall 16, and the upper and lower part of piston 17 is placed with the first water storage cavity respectively
14-1 and the second water storage cavity 14-2, the first water storage cavity 14-1 are sealingly fastened on piston 17 by fillister head screw 15-1,
Second water storage cavity 14-2 is sealingly fastened in lower capping 4 by fillister head screw 15-2；
Described capping 8 be internally provided with L-type first appearance water channel 8-1, L-type first appearance the one end of water channel 8-1 with
First connector 10-1 is connected, and other end interface 13-1 fast with the first pipeline is connected, the first appearance aquaporin of L-type
8-1 is connected in the corner of L-type with the first water storage cavity 14-1；
Described lower capping 4 is internally provided with the second appearance aquaporin-4-1 of L-type, second appearance aquaporin-4-1 one end of L-type
It is connected with the second connector 10-2, other end interface 13-2 fast with the second pipeline is connected, the second appearance water of L-type leads to
Road 4-1 is connected in the corner of L-type with the second water storage cavity 14-2.
Above-described Volume Changes analyzer, the fast interface 13-1 of the first described pipeline and the fast interface of the second pipeline
13-2 is connected with the water flowing pipeline in cross box 1 respectively.
Above-described Volume Changes analyzer, it is characterised in that left along short transverse on described side tube-wall 16 ellipse
Circular channel, cantilever lever 5 through the oval-shaped passageway on side tube-wall 16, be fixed on the water storage cavity 14-2 of piston 17 and second it
Between.
The lower edge of capping 8, digital display meter 3 are fixed in above-described Volume Changes analyzer, one end of digital display meter fixture 6
Circular hole through on digital display meter fixture 6, and be fixed with fixed screw 7, the gauge head (3-1) of digital display meter 3 connects with cantilever lever 5
Touch.
Above-described Volume Changes analyzer, the range of described digital display meter 3 is 25mm.The first described water storage
The maximum pressure-bearing of cavity 14-1 and the second water storage cavity 14-2 is 3MPa.
Embodiment 2
The operate with method of Volume Changes analyzer：It is comprised the following steps：
Step one：Pipeline is connected, and will be attached between Volume Changes analyzer and ambient pressure source and balancing gate pit, is changed
One side tube-wall pipeline interface 22 of case 1 is connected by water flowing pipeline with the ambient pressure source in experiment, another side tube-wall
Pipeline interface 22 is connected by water flowing pipeline with balancing gate pit；
Step 2：Water filling is vented, and the top room 2 to Volume Changes analyzer carries out water filling exhaust, the He of rotary control switch 20
Pole changer 21, makes two switches be respectively directed to the direction in " Volume Changes " direction and " flowing up ", opens first row gas cap
11-1, using pressure control source to water filling in the second water storage cavity 14-2, until cantilever lever 5 is moved to apart from the ellipse of side tube-wall 16
8~the 10mm of top edge of shape hole, stops to the second water storage cavity 14-2) interior water filling；Rotation pole changer 21, points to it
" flowing downward " direction, the liquid in pressure control source is injected in the first water storage cavity 14-1, and suitably rocks top room 2, directly
Discharged without gas in the first water storage cavity 14-1, close first row gas cap 11-1, and top room 2 is inverted；Open second exhaust
Cap 11-2, using pressure control source to water filling in the first water storage cavity 14-1, until cantilever lever 5 is moved to the ellipse of side tube-wall 16
Untill the centre position of hole, pole changer 21 is rotated, it is pointed to " flowing up " direction, now pressure source is to the second water storage
Water filling in cavity 14-2, suitably rocks top room 2, untill the gas in the second water storage cavity 14-2 is drained, tightens second
Exhaust cap 11-2；Aforesaid operations are repeated 3-5 times, untill being discharged without bubble；
Step 3：Start experiment, by controlling switch 20 and pole changer 21 rotate respectively to " Volume Changes " direction and " to
Upper flowing " direction, now the reading of digital display meter 3 is h1, complete the preparation before experiment, you can start experiment；According to surrounding
The mechanism of pressure, whole experiment can be divided into ambient pressure and apply stage and ambient pressure voltage stabilizing stage：
Ambient pressure applies the stage：To reach set ambient pressure value in experimental design, ambient pressure source will be to
Liquid is injected in two water storage cavity 14-2, applies pressure, now, the second water storage cavity 14-2 expansions, promotion piston 17 rise, and squeeze
Press in the liquid inlet pressure room in the first water storage cavity 14-1, make pressure in the first water storage cavity 14-1 and balancing gate pit and the
It is equivalent in two water storage cavity 14-2, and then reach set target ambient pressure value σ3；Meanwhile, in the uphill process of piston 17,
Cantilever lever 5 is driven to move upwards, digital display meter 3 measures the shift value for obtaining and changes, and reading is h1；
The ambient pressure voltage stabilizing stage：Due to the effect of ambient pressure and axial compressive force, sample will occur compression, surrounding
Pressure is difficult to maintain stable state, in corresponding Volume Changes analyzer the first water storage cavity 14-1 and the second water storage cavity 14-2
Pressure value change, by servo feedback, ambient pressure source will be to injecting liquid, piston in the second water storage cavity 14-2
17 rise, and extrude the first water storage cavity 14-1, the first water storage cavity 14-1, the second water storage cavity 14-2 and balancing gate pit is maintained mesh
Mark ambient pressure value σ3, now, the variable quantity of liquid is sample in the first water storage cavity 14-1 or the second water storage cavity 14-2
The total variation of volume, the reading of digital display meter 3 is h2, the sectional area of water storage cavity 14 is s1, it is calculated total change of volume of sample
Change amount is Δ V=s1·|h1-h2|；
When pole changer 21 is rotated to " flowing downward " direction, the liquid in ambient pressure source will be into the first water storage cavity
14-1, piston 17 declines, and extrudes the second water storage cavity 14-2, ambient pressure is remained constant.
Claims (7)
1. a kind of Volume Changes analyzer, it is characterised in that it includes the top room (2) that cross box (1) is connected with cross box (1)
And the digital display meter (3) being connected with top room (2)；
Described cross box (1) includes casing (18), lower margin (19), controlling switch (20), pole changer (21) and side tube-wall pipe
Line interface (22), offers the circular hole for installing top room (2) on the top board of described casing (18), described lower margin (19) is solid
It is scheduled on the lower shoe of casing (18), controlling switch (20) and pole changer (21) are respectively arranged on the panel of casing (18),
By controlling switch (20) and the different steering of pole changer (21), the different connected modes of pipeline are capable of achieving；Described two
Side tube-wall pipeline interface (22) on the two sides of casing (18), by water flowing pipeline respectively with earthwork test Instrument around
Pressure source is connected with balancing gate pit；
Described top room (2) includes lower capping (4), cantilever lever (5), digital display meter fixture (6), capping (8), the first connector (10-
1), the second connector (10-2), first row gas cap (11-1), second row gas cap (11-2), connecting rod (12), the fast grafting of the first pipeline
Mouth (13-1), the fast interface of the second pipeline (13-2), the first water storage cavity (14-1), the second water storage cavity (14-2), side tube-wall
And piston (17) (16)；
Described lower capping (4) and capping (8) is individually fixed in the two ends of side tube-wall (16), and is connected by connecting rod (12),
Connecting rod (12) two ends are fixed using nut (9)；
Described capping (8) upper surface and lower capping (4) lower surface is separately installed with the first connector (10-1) and the second connection
Head (10-2), first row gas cap (11-1) and second row gas cap (11-2) are separately fixed at the first connector (10-1) and second and connect
On joint (10-2)；
Described piston (17) is internal positioned at side tube-wall (16), and the upper and lower part of piston (17) is placed with the first water storage cavity respectively
Body (14-1) and the second water storage cavity (14-2), the first water storage cavity (14-1) are sealingly fastened in by fillister head screw (15-1)
On piston (17), the second water storage cavity (14-2) is sealingly fastened in lower capping (4) by fillister head screw (15-2)；
Described capping (8) is internally provided with the first appearance aquaporin (8-1) of L-type, first appearance aquaporin (8-1) one end of L-type
It is connected with the first connector (10-1), the other end is connected with the fast interface of the first pipeline (13-1), the first appearance of L-type
Aquaporin (8-1) is connected in the corner of L-type with the first water storage cavity (14-1)；
Described lower capping (4) is internally provided with the second appearance aquaporin (4-1) of L-type, the second appearance aquaporin (4-1) of L-type
End is connected with the second connector (10-2), and the other end is connected with the fast interface of the second pipeline (13-2), and the second of L-type
Hold aquaporin (4-1) to be connected with the second water storage cavity (14-2) in the corner of L-type.
2. Volume Changes analyzer according to claim 1, it is characterised in that the fast interface (13- of the first described pipeline
1) it is connected with the water flowing pipeline in cross box (1) respectively with the fast interface of the second pipeline (13-2).
3. Volume Changes analyzer according to claim 1, it is characterised in that along height side on described side tube-wall (16)
To oval-shaped passageway is left, cantilever lever (5) is fixed on piston (17) with the second storage through the oval-shaped passageway on side tube-wall (16)
Between water chamber (14-2).
4. Volume Changes analyzer according to claim 1, it is characterised in that one end of digital display meter fixture (6) is fixed on
The lower edge of (8) is covered, digital display meter (3) is fixed through the circular hole on digital display meter fixture (6) with fixed screw (7), number
The gauge head (3-1) of aobvious table (3) is in contact with cantilever lever (5).
5. Volume Changes analyzer according to claim 4, it is characterised in that the range of described digital display meter (3)
It is 25mm.
6. Volume Changes analyzer according to claim 4, it is characterised in that described the first water storage cavity (14-1) and
The maximum pressure-bearing of the second water storage cavity (14-2) is 3MPa.
7. the operate with method of Volume Changes analyzer：It is characterised in that it includes following steps：
Step one：Pipeline is connected, and will be attached between Volume Changes analyzer and ambient pressure source and balancing gate pit, cross box
(1) a side tube-wall pipeline interface (22) is connected by water flowing pipeline with the ambient pressure source in experiment, another side neck
Wall pipeline interface (22) is connected by water flowing pipeline with balancing gate pit；
Step 2：Water filling is vented, and carries out water filling exhaust to the top room (2) of Volume Changes analyzer, rotary control switch (20) and
Pole changer (21), makes two switches be respectively directed to the direction in " Volume Changes " direction and " flowing up ", opens first exhaust
Cap (11-1), using pressure control source to second water storage cavity (14-2) interior water filling, until cantilever lever (5) is moved to apart from side neck
8~the 10mm of top edge of wall (16) ellipse hole, stops to second water storage cavity (14-2) interior water filling；Rotation pole changer
(21) it, is made to point to " flowing downward " direction, the liquid in pressure control source is injected in the first water storage cavity (14-1), and suitably
Rock top room (2), until the first water storage cavity (14-1) in without gas discharge, close first row gas cap (11-1), and will top
It is inverted room (2)；Second row gas cap (11-2) is opened, using pressure control source to first water storage cavity (14-1) interior water filling, until
Untill cantilever lever (5) is moved to the centre position of side tube-wall (16) ellipse hole, pole changer (21) is rotated, point to it
" flowing up " direction, now pressure source is to second water storage cavity (14-2) interior water filling, suitably rocks top room (2), until the
Untill gas in two water storage cavitys (14-2) is drained, second row gas cap (11-2) is tightened；Repeat aforesaid operations 3-5 times, until
Untill there is no bubble to discharge；
Step 3：Start experiment, by controlling switch (20) and pole changer (21) rotate respectively to " Volume Changes " direction with " to
Upper flowing " direction, now the reading of digital display meter (3) is h1, complete the preparation before experiment, you can start experiment；According to week
The mechanism of confined pressure power, whole experiment can be divided into ambient pressure and apply stage and ambient pressure voltage stabilizing stage：
Ambient pressure applies the stage：To reach set ambient pressure value in experimental design, ambient pressure source will be to the second storage
Injection liquid in water chamber (14-2), applies pressure, and now, the expansion of the second water storage cavity (14-2), promotion piston (17) rise,
Extrude in the liquid inlet pressure room in the first water storage cavity (14-1), make the pressure in the first water storage cavity (14-1) and balancing gate pit
It is equivalent in power and the second water storage cavity (14-2), and then reach set target ambient pressure value σ3；Meanwhile, on piston (17)
During rising, cantilever lever (5) is driven to move upwards, the shift value that digital display meter (3) measurement is obtained changes, and reading is h1；
The ambient pressure voltage stabilizing stage：Due to the effect of ambient pressure and axial compressive force, sample will occur compression, ambient pressure
It is difficult to maintain stable state, in corresponding the first water storage of Volume Changes analyzer cavity (14-1) and the second water storage cavity (14-2)
Pressure value change, by servo feedback, ambient pressure source will be living to injection liquid in the second water storage cavity (14-2)
Plug (17) rises, and extrudes the first water storage cavity (14-1), makes the first water storage cavity (14-1), the second water storage cavity (14-2) and pressure
Power room maintains target ambient pressure value σ3, now, the first water storage cavity (14-1) or second water storage cavity (14-2) interior liquid
Variable quantity is the total variation of volume of sample, and the reading of digital display meter (3) is h2, the sectional area of water storage cavity (14) is s1, calculate
The total variation for obtaining volume of sample is Δ V=s1·|h1-h2|；
When pole changer (21) rotation is to " flowing downward " direction, the liquid in ambient pressure source will be into the first water storage cavity
(14-1), piston (17) declines, and extrudes the second water storage cavity (14-2), ambient pressure is remained constant.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113686259A (en) * | 2021-09-14 | 2021-11-23 | 中国科学院武汉岩土力学研究所 | Soil body expansion and shrinkage measuring method and device under confining pressure control condition |
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| CN104034385A (en) * | 2014-07-02 | 2014-09-10 | 南京力淮软件科技有限公司 | Fully automatic diffusion bubble scour measuring instrument used for unsaturated soil test |
| CN104155428A (en) * | 2014-08-13 | 2014-11-19 | 中国科学院武汉岩土力学研究所 | Polluted soil shear penetration test device |
| CN204101419U (en) * | 2014-10-13 | 2015-01-14 | 山西省交通科学研究院 | Accurately can measure the measuring system of native infiltration coefficient |
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| CN201773056U (en) * | 2010-08-20 | 2011-03-23 | 中国科学院武汉岩土力学研究所 | Multi-functional soil consolidation and permeation test device |
| CN104034385A (en) * | 2014-07-02 | 2014-09-10 | 南京力淮软件科技有限公司 | Fully automatic diffusion bubble scour measuring instrument used for unsaturated soil test |
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| CN204101419U (en) * | 2014-10-13 | 2015-01-14 | 山西省交通科学研究院 | Accurately can measure the measuring system of native infiltration coefficient |
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| CN113686259A (en) * | 2021-09-14 | 2021-11-23 | 中国科学院武汉岩土力学研究所 | Soil body expansion and shrinkage measuring method and device under confining pressure control condition |
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