CN205982271U - A air -dry control system for salt expansion test instrument - Google Patents

Abstract

The utility model discloses an air -dry control system for salt expansion test instrument, a serial communication port, including an air compressor machine, the air compressor machine is given vent to anger the end and is connected to a control by temperature change expansion box through gas pipeline, is provided with the expansion box temperature control device who realizes internal temperature control on the control by temperature change expansion box, and control by temperature change expansion box gas outlet is connected to through gas pipeline and sets up in the air -dry unit of inner tube inner wall, is provided with the gas outlet and is connected to the sample bucket outside through the pipeline of giving vent to anger in air -drying the unit. The utility model discloses can be used for that the salt expansion test instrument is experimental to be used, have simple structure, do benefit to implementation, realize conveniently that humidity from high to low continuity changes control, can also reduce the influence of process of the test and advantages such as assurance test precision.

Description

Air-dried control system for the swollen tester of salt

Technical field

This utility model is related to a kind of swollen tester of salt of salting earth salt swollen harm research field and in particular to a kind of salt is swollen The air-dried control system for the swollen tester of salt of tester.

Background technology

Salinized soil isSolonchakWithAlkaline earthAnd various salinization,Alkali-affected soilGeneral name.Solonchak refers to soluble-salt in soil Content reaches notable harm to plant growthGreat soil group.Salt content index is different because different salt are grouped into.Alkaline earth refers to soil The volume exchangeable sodium containing harm plant growing in earth and changing soil property.Salinized soil be mainly distributed on inland arid,Half Arid area, coastal region is also distributed.About 897.0 ten thousand square kilometres of whole world salinized soil area meter, accounts for world land total The 6.5% of area, accounts for the 39% of the arid biogeographic zone gross area.Chinese salinized soil area there are about more than 20 ten thousand square kilometres, accounts for the total face in territory Long-pending 2.1%.The salt of salinized soil is swollen to lead to ground tympanites, cause the constructure grounds such as highway, airport, house to produce bulge, open The engineering disease such as split；The engineerings such as the road in NORTHWEST CHINA area, pipeline, transmission of electricity, airport, Fang Jian all relate generally to salting earth salt Distension syndrome does harm to problem.Therefore the research for salinized soil has realistic meaning for the building construction of saline soil area very much.

Solve the salt distension syndrome evil of salinized soil, the most basic be intended to understand the swollen machine of salting earth salt by the swollen experimental study of salt Reason, influence factor and its affecting laws.Salt is swollen, and test is carried out using the swollen tester of salt.At present, the swollen tester of existing salt is also deposited In following more deficiency：1. temperature can only be done（Freeze-thaw cycle, thermograde）Test swollen with the salt under load action is it is impossible to realize The swollen test of water content continually varying drying and watering cycle salt under constant temperature is it is impossible to realize freeze-thaw cycle and drying and watering cycle coupling under load action The swollen test of salt closed；2. function is simple, and integration degree is low；3. adopt integrally-built sample bucket, and salt swollen test sample chi Very little highly larger, the sample bucket constraint swollen to the vertical salt of sample during test substantially, leads to result of the test substantially less than normal；4. test bucket Highly certain, lead to specimen height size adjusting limited.

Therefore, how to improve further the swollen test apparatuses of salt function, improve the swollen test apparatuses of salt precision, to more preferable Ground provides technical conditions for studying the swollen mechanism of salt of salinized soil, influence factor and its affecting laws, become this area have considered Problem.

In order to improve the function of the swollen test apparatuses of salt, applicant considers to devise a kind of swollen tester of multi-functional salt, including Sample bucket and temperature regulation system, sample bucket includes outer barrel and the inner core being arranged in outer barrel, and outer barrel is vertically installed at sample bucket On frame, temperature regulation system includes a circulation fluid temperature control equipment A, and circulation fluid temperature control equipment A passes through to circulate liquid pipe The circumferential circulation fluid chamber circulation that between road and outer barrel and inner core, gap is constituted connects, and its feature is, also includes for realizing The sample humidity control system that the humidity of inner core pilot scale sample is controlled, in humidity control system, is arranged at including one The container that adds water outside sample bucket, the container that adds water is connected to inner tank theca and inner core inner space by pipeline.

So the swollen tester of this salt, when using, can realize the control to sample humidity in the way of using adding water, but How just can further facilitate and to realize the humidity simulation of continually varying control from high to low, to help be better achieved to salinized soil More comprehensively research and analyse, become the problem needing to consider further to solve.

Utility model content

For above-mentioned the deficiencies in the prior art, technical problem to be solved in the utility model is：How a kind of knot is provided Structure is simple, beneficial to enforcement, conveniently realizes the humidity air-dried control system for the swollen tester of salt that consecutive variations control from high to low System.

In order to solve above-mentioned technical problem, this utility model employs following technical scheme：It is based on equipment in the application Use state carries out orientation description.

A kind of air-dried control system for the swollen tester of salt it is characterised in that including an air compressor machine, give vent to anger by air compressor machine End is connected to a temperature control expansion box by gas pipeline, and temperature control expansion box is provided with the expansion box realizing internal temperature control Attemperating unit, temperature control expansion box gas outlet is connected to by gas pipeline in the air dried cell being arranged at inner core inwall, air-dries single It is provided with gas outlet in unit and be connected to outside sample bucket by outlet pipe.

As such, it is possible to air be pressed in temperature control expansion box by air compressor machine, air adjustment is to meet needed for test After air pressure and temperature, it is re-fed in the air dried cell of inner core inwall, the sample in internal tube inner chamber is air-dried, to control Its humidity consecutive variations from high to low, are better achieved sample humidity and control simulation, improve test simulation effect.

Further, the gas pipeline between air compressor machine outlet side and temperature control expansion box is provided with gas pressure regulator, uses In the air pressure within control temperature control expansion box.Its air pressure constant can be made to ensure to air-dry requirement in 10kPa～30kPa, and not Destroy soil sample structure.

As optimization, described temperature control expansion box is provided with a circulation fluid interlayer, circulation fluid interlayer passes through pipeline and Individual circulation fluid temperature control equipment C circulation connection.So, the air in temperature control expansion box is controlled to reach examination during test by circulation fluid Temperature needed for sample, it is to avoid air themperature and the inconsistent impact to test accuracy of specimen temperature.

Further, temperature control expansion box includes outer case and interior case, interior one lateral surface of case and one medial surface of outer case Fitting, fixing and air compressor machine outlet side is communicated to interior case by this side, and remaining side and upper bottom surface vacantly arrange and constitute Circulation fluid interlayer, is provided with support I-steel between interior case bottom surface and outer case inner bottom surface.This spline structure is more reasonable, convenient The installation arranging and facilitating gas pipeline interface of circulation fluid interlayer.

Further, it is provided with the circulation fluid coil pipe of S-shaped coiling in interior case, pipeline and institute are passed through in circulation fluid coil pipe two ends State circulation fluid temperature control equipment C circulation connection.As such, it is possible to effective control to temperature control gas storage the temperature inside the box is better achieved System.

As optimization, described air dried cell includes the annular groove being circumferentially disposed on inner core inwall, annular groove groove The closing of mouthful position is provided with a circle baffle plate, and baffle plate offers some passages, formed between baffle plate and annular groove for The ventilating layer of gas pipeline connection.

So, the structure of this air dried cell, can realize air-drying, simultaneously and not of the sample in internal tube inner chamber well Can interfere with sample itself test process it is ensured that result of the test accurately and reliably.

Further, baffle surface is provided with grenadine, so can be better protected from sample blocking passage it is also possible to keep away Be excused from an examination sample enter passage and affect test accuracy.Further baffle plate adopts soft plastic board and inner surface and inner core surface of internal cavity Unanimously；Can conveniently realize installing and seal, preferably to reduce the impact to test.

Yet further, it has been filled with sand grains in ventilating layer, sand grains can ensure that permissible while ventilation drying effect Avoid soft plastic board indent well it is ensured that baffle inner wall profile is consistent with inner core surface of internal cavity, at utmost reduce to test The impact of precision.Adopt the homogeneous sand grains of 1 millimeter of particle diameter as preferred sand grains, so that the effect above reaches most preferably.

In sum, this utility model can be used in the test use of salt swollen tester, has structure simply, beneficial to enforcement, Seriality change controls additionally it is possible to reduce the impact to process of the test and guarantee test precision etc. from high to low conveniently to realize humidity Advantage.

Brief description：

Fig. 1 is a kind of structural representation of the multi-functional salt swollen tester embodiment employing this utility model structure.

Fig. 2 is the cross section structure diagram of independent temperature control expansion box in Fig. 1.

Fig. 3 is the structural representation of independent sample barrel section in Fig. 1.

Fig. 4 is the structural representation of independent water adjusting valve in Fig. 1.

Fig. 5 is the structural representation of independent inner cylindrical portion in Fig. 1.

Fig. 6 is the structural representation of independent collet part in Fig. 1.

Fig. 7 is the structural representation of independent header field in Fig. 1.

Fig. 8 is the structural representation of independent bottom cover member in Fig. 1.

Fig. 9 is the part-structure schematic diagram of independent two interior shell rings in Fig. 1.

Figure 10 is the structural representation of independent gas pressure regulator part in Fig. 1.

Figure 11 is the structural representation that can show sample bucket cover portion in Fig. 1.

Specific embodiment

New to this practicality with reference to a kind of swollen tester of multi-functional salt employing this utility model structure and its accompanying drawing Type is described in further detail.

Optimum embodiment：As shown in figs. 1-11, the swollen tester of a kind of multi-functional salt, including sample bucket and temperature adjusting system System, sample bucket includes outer barrel 18 and the inner core being arranged in outer barrel, and outer barrel 18 is vertically installed on sample gantry 13, temperature adjusting System includes a circulation fluid temperature control equipment A6, circulation fluid temperature control equipment A6 pass through circulation fluid pipeline and outer barrel with interior The circumferential circulation fluid chamber circulation connection that between cylinder, gap is constituted, also includes controlling for realizing the humidity to inner core pilot scale sample Sample humidity control system.

This swollen tester of sample salt, when using, is capable of more ambient parameter simulations, it is possible to achieve sample is done The control of humidity, and then realize the swollen test of water content continually varying drying and watering cycle salt under constant temperature, help realize to salinized soil more Plus comprehensively research and analyse.

In present embodiment, described sample humidity control system includes a container that adds water being arranged at outside sample bucket 4, the container 4 that adds water is connected to inner tank theca and inner core inner space by pipeline.So can realize weighing needed for test Water is added to and adds water in container 4, then controls and enters in interior tube inner chamber, realizes the adjustment to sample humidity and controls.During enforcement, The container 4 that adds water adopt installing rack 23 be arranged on position higher than sample bucket top with facilitate carry out adding water by current deadweight moistening. Further add water and be provided with water adjusting valve 27 on the pipeline between sample bucket for the container, to facilitate control to add water speed, it is to avoid plus Water is too fast to be led to humidity uneven and affects result of the test.

Wherein, described sample humidity control system includes an air compressor machine 5, and gas pipeline is passed through in air compressor machine 5 outlet side It is connected to a temperature control expansion box 2, temperature control expansion box 2 is provided with the expansion box attemperating unit realizing internal temperature control, temperature Control expansion box gas outlet is connected to by gas pipeline in the air dried cell being arranged at inner core inwall, is provided with out in air dried cell QI KOU is simultaneously connected to outside sample bucket by outlet pipe 33.Air compressor machine is preferably the air compressor machine of the no hot absorption drier of band.

As such, it is possible to dried air be pressed in temperature control expansion box by air compressor machine, air adjustment is to meet examination After testing required air pressure and temperature, it is re-fed in the air dried cell of inner core inwall, the sample in internal tube inner chamber enters sector-style Dry, to control its humidity to change, sample humidity is better achieved and controls simulation, improve test simulation effect.Further, Gas pressure regulator 40 is provided with the gas pipeline between air compressor machine outlet side and temperature control expansion box, for controlling temperature control expansion box Internal air pressure.Its air pressure can be made to keep being scheduled between 10kPa～30kPa, to ensure to air-dry requirement, and do not destroy soil sample Structure.During enforcement further, temperature control expansion box 2 is additionally provided with gas storage temperature sensor 1, is used for realizing temperature control expansion box 2 The detection of interior air themperature is with conveniently regulating and controlling.

Wherein, described temperature control expansion box is provided with a circulation fluid interlayer, circulation fluid interlayer is followed by pipeline and one Ring liquid temp control device C8 circulation connection.So, to control the air in temperature control expansion box to reach examination during test by circulation fluid Sample is temperature required, it is to avoid air themperature and the inconsistent impact to sample precision of sample.

Wherein, temperature control expansion box includes outer case 3 and interior case 10, interior 10 1 lateral surface of case and 3 one inner sides of outer case Face fits, and fixing and air compressor machine outlet side is communicated to interior case by this side, and remaining side and upper bottom surface are vacantly arranged and structure Become circulation fluid interlayer, between interior case 10 bottom surface and outer case 3 inner bottom surface, be provided with support I-steel 12.This spline structure more closes Reason, the setting facilitating circulation fluid interlayer and the installation facilitating gas pipeline interface.Further, it is provided with S-shaped disk in interior case Around circulation fluid coil pipe 11, circulation fluid coil pipe 11 two ends are passed through pipeline and described circulation fluid temperature control equipment C8 circulation and are connected. As such, it is possible to effective control to temperature control gas storage the temperature inside the box is better achieved.

Wherein, described air dried cell includes the annular groove being circumferentially disposed on inner core inwall, annular groove notch position Put closing and be provided with a circle baffle plate 38, baffle plate 38 offers some passages, formed between baffle plate and annular groove for The ventilating layer 36 of gas pipeline connection.

So, the structure of this air dried cell, can realize air-drying, simultaneously and not of the sample in internal tube inner chamber well Can interfere with sample itself test process it is ensured that result of the test accurately and reliably.

Wherein, baffle surface is provided with grenadine 37, so can be better protected from sample blocking passage it is also possible to avoid Sample enters passage and affects test accuracy.Further soft plastic board and inner surface and interior can also be adopted by baffle plate during enforcement Tube inner chamber surface is consistent；Can conveniently realize installing and seal, preferably to reduce the impact to test.Yet further, lead to It has been filled with sand grains, sand grains can ensure that and can avoid in soft plastic board well while ventilation drying effect in stratification of wind 36 Recessed it is ensured that baffle inner wall profile is consistent with inner core surface of internal cavity, at utmost reduce the impact to test accuracy.As preferred sand Grain adopts homogeneous sand grains or the high rigidity sand grains of 1 millimeter of particle diameter（As normal sand sand grains）, so that the effect above reaches most preferably.

Wherein, interior tube inner chamber top face has been disposed adjacent a top circulation fluid chamber, and top circulation fluid chamber passes through Circulation fluid pipeline connects setting with described circulation fluid temperature control equipment A6 circulation；Interior tube inner chamber subjacent has been disposed adjacent one Individual bottom cycle sap cavity room, circulation fluid pipeline is passed through in bottom cycle sap cavity room and a circulation fluid temperature control equipment B7 circulation connects Logical setting.

So, inner core top and bottom can respectively by the circulation fluid of different temperatures, realize thermograde control so that More preferably simulation can be there is the actual environment situation of the temperature difference by earth's surface downward different buried depth stratum during specimen test, improve test Simulation effect, improves test accuracy, salt expandability to salinized soil is better achieved can be studied.

Wherein, it is provided with top cover 32 at interior tube inner chamber top surface, tube inner chamber top surface in top cover 32 lower surface composition, in top cover 32 Portion's hollow setting forms top circulation fluid chamber, and lid periphery forms can slide up and down with interior tube inner chamber perisporium and contacts, top cover On be vertically provided through temperature sensor fixing hole 32-3 and humidity sensor installing hole 32-4, temperature sensor fixing hole is used In installing sample temperature sensor 16 and so that the display portion of sample temperature sensor 16 is exposed to above sample bucket, wet Degree sensor mounting hole is used for installing humidity sensor 25 and so that humidity sensor 25 is exposed to above sample bucket；Above top cover It is additionally provided with for detecting that top cover moves up the instrumentation 26 of distance.

So adopt top cover simultaneously as the basis of setting top circulation fluid chamber, and realize salting soil expansion detection Basis, has structure simply, the advantages of easy to detect, can also conveniently arrange temperature sensor and humidity sensor with anti-simultaneously Feedback detection salting soil sample internal temperature and humidity condition it is ensured that in process of the test state modulator accurate reliability.

Wherein, instrumentation 26 is electronic centigrade scale and is fixed on sample gantry, electronic centigrade scale lower end contact Contact with top cover upper surface；Can ensure that the accuracy of accuracy of detection.

Wherein, it is additionally provided with the load simulating device for top cover is applied with downward pressure above top cover 32.

As such, it is possible to dependence load simulating device, realize the load simulation to salinized soil, realize freeze thawing under load action and follow The swollen test of salt that ring is coupled with drying and watering cycle.Improve test simulation effect, improve to salinized soil performance study analysis ability.

Wherein, described load simulating device, including the dowel steel 32-5 arranging straight up positioned at top cover upper surface, Also include one to be horizontally disposed with and lever beam 15 above dowel steel for the apical grafting, lever beam one end is support end and support end upper table Face is spacing by lever position-limit mechanism, and the lever beam other end is loading end and loading end is provided with and adds for the counterweight loading counterweight 17 Load plate 9.So, load negative pressure by way of lever, one is the size amplifying load by lever principle, and two is can be preferably In holding process of the test, carrying size is constant, the simulation effect to ensure constant load.During enforcement further, lever limit Position mechanism includes a fulcrum beam being horizontally placed on above lever beam, fulcrum beam spins by screw thread and is vertically provided with a tune Section bolt 24, regulating bolt 24 lower end contacts formation fulcrum with lever beam.As such, it is possible to tune to lever level is better achieved Section is it is ensured that the calculating of carrying accurately and keeps load steadily constant.During enforcement, the upper surface of lever beam loading end is additionally provided with Air level 14, can preferably judge to adjust the level of lever beam.Further, lever beam and regulating bolt lower end contact position with And and dowel steel tip contact at be the spherical structure of male-female engagement.As such, it is possible to be accurately positioned out force application location it is ensured that bearing Carry and load effect.Yet further, the top surface middle part of counterweight loading disc upwardly extends a vertical peg of formation and is articulated in On a hook in the middle part of peg beam loading end lower surface.So ensure that the counterweight weight loading is concentrated and be applied to the one of lever beam On individual point, beneficial to the precision improving load simulation calculating.Yet further, in the middle part of top cover inner chamber, corresponding dowel steel position also has The entirety being vertically connected with is in the connector of taper type, to be preferably delivered on sample load pressure in the form of evenly load Surface.

Wherein, it is provided with bottom 35 at interior tube inner chamber bottom surface, bottom 35 upper surface forms interior tube inner chamber bottom surface, inside bottom Hollow setting forms bottom cycle sap cavity room, and bottom periphery forms can slide up and down with interior tube inner chamber perisporium and contacts, under bottom Side is provided with the bottom height adjustment mechanism being capable of the regulation of bottom height and position.During enforcement, bottom 35 bottom surface is additionally provided with Export 35-2 with bottom cycle liquid chamber bottom circulation fluid entrance 35-1 and bottom circulation fluid.

So, by bottom as salting soil sample holding members and bottom cycle sap cavity room basic component, structure is simple Reliable, bottom can slide up and down and height adjustment mechanism can be leaned on to adjust so as to the adjustment of specimen height can conveniently be realized, and carries High test effect.

Wherein, described bottom height adjustment mechanism includes a height adjustment bolt 20, and height adjustment bolt 20 vertically sets Put and screw thread spins cooperation in the middle screw thread in the hole of sample bottom of the barrel, height adjustment bolt upper end is rotationally joined by bearing 34 Conjunction is connected on bottom 35, and height adjustment bolt lower end is provided with altitude mixture control handle.

As such, it is possible to convenient pass through the adjustment to specimen height for the rotation height regulation handle realization, structure is simple, adjustment side Just fast reliable.

Wherein, bottom height adjustment mechanism, also includes one and height adjustment bolt spaced rule 22 side by side, Rule 22 is fixed on sample gantry, and height adjustment bolt lower section is additionally provided with an altitude location chi 21, highly fixed Position chi 21 one end can slide up and down to spacing cooperation on rule 22, and the other end is by being fixed in height adjustment bolt 20 Individual bearing and height adjustment bolt 20 are rotatably connected.As such, it is possible to more easily directly observed reading obtains bottom Adjust height, and then obtain specimen height.

Wherein, outer barrel includes the outer barrel body of cylindrical shape and positioned at an entirety of outer barrel body bottom portion bottom in the form of annular discs Support 19, the screwed hole of collet 19 middle part setting and height adjustment bolt 20 cooperation, collet 19 is additionally provided with two circulation liquid pipes Road via and an escape pipe via, collet upper surface is coaxially arranged with two circle draw-in grooves, outer barrel body and inner core each clamping And seal and be fixed in corresponding draw-in groove.So, there is structure simple, the advantage of installation convenient for assembly.

Wherein, outer barrel also includes a sample bucket capping 30 positioned at outer barrel body upper end, and sample bucket covers 30 level sides To projection be in that interior tube inner chamber is exposed at annular and middle part, sample bucket covers lower surface and outer barrel body upper end and inner core upper end Any one is sealedly and fixedly connected and coordinates for the embedded grafting that can slide up and down with another one（It is made integrally not affect interior Cylinder vertically movable）, sample bucket capping 30 is provided with the interface for accessing the container conduit that adds water the connection by inside Pipeline 29 is connected to interior tube inner chamber, and the capping of sample bucket is additionally provided with the interface 31 of the gas pipeline for accessing temperature control expansion box And air dried cell is connected to by internal connecting pipe.So there is structure simple, convenient for assembly install and pipe arrangement Advantage.When being embodied as, sample bucket capping lower surface has to be fixed for the outer barrel fixing with outer barrel body upper end grafting sealing With cannelure, there is inside outer barrel fixation cannelure the downward annular flange flange of a circle, annular flange flange lower end can slide up and down to Grafting coordinates in a capping connection cannelure of inner core upper surface.So, can facilitate sample bucket capping complete and Inner core and the realization sealing easy to connect of outer barrel body, make it not affect inner core moving up and down in specimen again, protect Confirmatory test precision is reliable.

In present embodiment, described inner core is spliced by multiple interior shell rings 28 vertically and obtains, between adjacent inner barrel section 28 by In lower section, a shell ring upper surface taper type structure upwards is inserted into shell ring lower surface corresponding taper hole shape structure in top and joins Close and be connected, and in lower end, shell ring does not constrain shell ring in upper end and moves up, at cooperation between adjacent inner barrel section outside be provided with close Sealer 41 is used for completely cutting off the circumferential circulation fluid chamber outside fit clearance and inner core.So make in the swollen process of the test of salt, maximum Degree reduces the constraint of the inner core inwall suffered by axial expansion of sample, substantially reduces the impact to the vertical swell increment of sample, pole The earth improves test accuracy.

As a kind of version of diaphragm seal 41 during enforcement, can be using elastica and to be provided separately within adjacent two At individual interior shell ring cooperation, such consumptive material is less.Can also be using the cylindrical shape diaphragm seal surrounding whole inner core peripheral surface, this Sample can better ensure that sealing effectiveness and reduce the effect of constraint value to the vertical expansion of sample for the diaphragm seal itself.Preferably seal Film upper and lower ends are fixed in the upper and lower ends of outer barrel inwall, so that circulation fluid is circulated in outer barrel inwall and seal intermembranous, circulation fluid During circulation, diaphragm seal can be attached on interior bucket outer wall, and so existing good sealing effectiveness also has good temperature control effect, and will The vertical impact expanding of sample is preferably minimized.

In present embodiment, shell ring in each is all correspondingly arranged at least one air dried cell and at least circumference is upper uniformly Four of arrangement are used for the water inlet that sample is added water.So can more preferably and more uniformly improve humidity control effect.

In this specific embodiment, described circulation fluid temperature control equipment A, circulation fluid temperature control equipment B and circulation fluid Temperature control equipment C, all using High Precision Low Temperature groove, has temperature control conveniently, the high advantage of control accuracy.

Above-mentioned salt is swollen, and tester has the advantages that：1. achieve water content continually varying dry and wet under temperature-controllable Test that cyclic salt is swollen；2. achieve the swollen test of the salt that under load action, freeze-thaw cycle is coupled with drying and watering cycle；3. function is integrated Degree is high, enables under the influence factors such as freeze-thaw cycle, thermograde, load, drying and watering cycle and each influence factor's coupling condition The swollen test of salt, and each factor all can manual control above；4. stagewise sample bucket substantially reduces the vertical swell increment to sample Impact, test result more accurate；5. sample drum head supporting plate height can realize specimen height in sample bucket with up-down adjustment（Interior bucket） Any setting in altitude range.

Performance detection test is carried out to above-mentioned tester, result of the test shows the sample of a high 30cm, diameter 10cm Water content drop to 3%～6% from 20% and only need 2d～4d（When temperature is low, the time is longer, and current temperature needs at 0～5 DEG C 6d）, the salt bulk measured using stagewise sample bucket is substantially big compared with the salt bulk that monoblock type sample bucket is measured, and therebetween Gap increase with specimen height and increase, and slightly reduce with the increase of specimen finish.During drying and watering cycle circulation experiment The air pressure of air in calorstat should strictly be controlled, to avoid air pressure to cross havoc soil sample structure, preferably control within 30kPa.

Therefore the swollen tester of above-mentioned salt is capable of more environment parameter controls, improves test simulation effect, has structure Simply, test accuracy is high, and sample parameter is flexibly adjustable, can advantage more than test method, be highly suitable for salinized soil performance Research.

Claims (10)

1. a kind of air-dried control system for the swollen tester of salt is it is characterised in that include an air compressor machine, air compressor machine outlet side One temperature control expansion box is connected to by gas pipeline, temperature control expansion box is provided with the expansion box temperature realizing internal temperature control Control device, temperature control expansion box gas outlet is connected to by gas pipeline in the air dried cell being arranged at inner core inwall, air dried cell In be provided with gas outlet and be connected to outside sample bucket by outlet pipe.

2. be used for as claimed in claim 1 the air-dried control system of the swollen tester of salt it is characterised in that air compressor machine outlet side and It is provided with gas pressure regulator on gas pipeline between temperature control expansion box.

3. it is used for as claimed in claim 1 the air-dried control system of the swollen tester of salt it is characterised in that described temperature control expansion box On be provided with a circulation fluid interlayer, circulation fluid interlayer passes through pipeline and circulation fluid temperature control equipment C circulation connection.

4. it is used for the air-dried control system of the swollen tester of salt as claimed in claim 3 it is characterised in that temperature control expansion box includes Outer case and interior case, interior one lateral surface of case and one medial surface of outer case fit fixing and this side is passed through in air compressor machine outlet side Face is communicated to interior case, and remaining side and upper bottom surface vacantly arrange and constitute circulation fluid interlayer, in interior case bottom surface and outer container body It is provided with support I-steel between bottom surface.

5. it is used for as claimed in claim 4 the air-dried control system of the swollen tester of salt it is characterised in that being provided with interior case and being in The circulation fluid coil pipe of S-shaped coiling, circulation fluid coil pipe two ends are passed through pipeline and are connected with described circulation fluid temperature control equipment C circulation.

6. it is used for as claimed in claim 1 the air-dried control system of the swollen tester of salt it is characterised in that described air dried cell bag Include the annular groove being circumferentially disposed on inner core inwall, the closing of annular groove notch position is provided with a circle baffle plate, on baffle plate Offer some passages, formed between baffle plate and annular groove for the ventilating layer with gas pipeline communication.

7. it is used for the air-dried control system of the swollen tester of salt as claimed in claim 6 it is characterised in that baffle surface is provided with Grenadine.

8. it is used for the air-dried control system of the swollen tester of salt as claimed in claim 6 it is characterised in that baffle plate adopts flexible plastic Plate and inner surface is consistent with inner core surface of internal cavity.

9. it is used for the air-dried control system of the swollen tester of salt as claimed in claim 6 it is characterised in that filling sets in ventilating layer It is equipped with sand grains.

10. it is used for the air-dried control system of the swollen tester of salt as claimed in claim 9 it is characterised in that sand grains adopts 1 millimeter The homogeneous sand grains of particle diameter.