CN104034863A - Freezing-thawing centrifugal model box in freezing-thawing deformation centrifugal simulation system - Google Patents
Freezing-thawing centrifugal model box in freezing-thawing deformation centrifugal simulation system Download PDFInfo
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- CN104034863A CN104034863A CN201410299743.3A CN201410299743A CN104034863A CN 104034863 A CN104034863 A CN 104034863A CN 201410299743 A CN201410299743 A CN 201410299743A CN 104034863 A CN104034863 A CN 104034863A
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Abstract
The invention discloses a freezing-thawing centrifugal model box in a freezing-thawing deformation centrifugal simulation system. The freezing-thawing centrifugal model box comprises a heat exchange system and a model box body, wherein the heat exchange system covers an opening of the model box body and consists of a sealed box body and multiple semiconductor devices arranged in the sealed box body; the multiple semiconductor devices are arrayed on a heat exchange base plate at intervals and are connected with the heat exchange base plate; a plurality of sensor mounting holes are formed in the sealed box body in clearances of the multiple semiconductor devices and consist of upper holes formed in a top heat exchange cover and lower holes corresponding to the heat exchange base plate; a sensor mounting sleeve is arranged in each sensor mounting hole; a through hole is formed in each sensor mounting sleeve; the sizes of the through holes are slightly larger than the sizes of the lower holes in the heat exchange base plate; the upper ends of the sensor mounting sleeves penetrate through the upper holes and are fixed on the top heat exchange cover; the bottom ends of the sensor mounting sleeves are fixed on the upper surface of the heat exchange base plate around the lower holes. The freezing-thawing centrifugal model box is reasonable in structure and convenient for displacement sensor mounting, and can realize flexible extending amount adjustment of sensors and meet a requirement on depths of different soil models.
Description
Technical field
The present invention relates to freeze thawing distortion centrifugal model test system, be specifically related to the freeze thawing centrifugal mold molding box in freeze thawing distortion centrifuge modelling system.
Background technology
Centrifuge modelling tests technology is used widely in as aspect researchs such as national defence, medical treatment, geotechniques in different industries, and fast-developing.Centrifugal test equipment is the important step that realizes this technology.
Freeze thawing centrifugal model test system is for studying Frozen Ground Area related building or facility, because of the centrifugal test equipment of the large generation frozen swell and melt settlement of temperature variation phenomenon.Development and Application is few at home for this kind of testing equipment, belongs at present the starting stage.This freeze thawing centrifugal model test system mainly contains the major parts such as freeze thawing model casing, recirculating cooling water system and control system and forms.Wherein freeze thawing model casing is mainly that soil model is contained in the model casing with insulation effect, above casing, be covered with heat-exchange system, heat-exchange system is to utilize the polylith semiconductor devices heat of freezing to realize temperature variation, by direct current energy, convert cold and hot soil model downwards surface to and transmit cold and hot energy, make soil model ecto-entad produce lifting/lowering temp effect, thereby realize simulated soil frozen swell and melt settlement phenomenon.
Freeze thawing centrifugal test need to be carried out displacement measurement to soil model, thus need a kind of displacement transducer be installed in freeze thawing model casing according to sensor used, to meet test demand.Freeze thawing centrifugal model test at home development and Application is few, and there are no the report of displacement transducer bracing or strutting arrangement, the how installation position displacement sensor in freeze thawing centrifugal mold molding box is to need the problem that solves.
Summary of the invention
Object of the present invention is just to provide a kind of freeze thawing centrifugal mold molding box, solve in freeze thawing centrifugal test, the how installation question of direct current back springing type sensor in freeze thawing centrifugal mold molding box, this freeze thawing centrifugal mold molding box is under centrifugal field, sensor carrying centrifugal load also can be adjusted relative and soil position flexibly, avoid model the temperature inside the box to run off by sensor simultaneously, meet experimental measurement demand.
In order to achieve the above object, the present invention has adopted following technical scheme: the freeze thawing centrifugal mold molding box in freeze thawing distortion centrifuge modelling system, comprise the heat exchange series model casing of unifying, the case mouth of described heat-exchange system overlay model case, heat-exchange system is comprised of seal case and the polylith semiconductor devices being arranged in seal case, polylith semiconductor devices is spaced on heat interchange base plate, and with heat interchange bottom plate connecting; On the seal case at polylith semiconductor devices interval, be provided with some installation of sensors hole, installation of sensors hole is comprised of the lower hole corresponding with heat interchange base plate, the upper hole on heat interchange top cover, lower hole is threaded hole, in each installation of sensors hole, be provided with installation of sensors cover, in installation of sensors cover, it is a through hole, clear size of opening is slightly larger than the lower hole on heat interchange base plate, installation of sensors set upper side is through upper hole, and be fixed on heat interchange top cover, bottom is fixed on the heat interchange plate upper surface of lower hole periphery.
As a further improvement on the present invention, described installation of sensors set upper side passes header field and is provided with external thread, and the first set nut is fixed top cover and installation of sensors cover locking.
As a further improvement on the present invention, described installation of sensors cover bottom is provided with flange, and flange is connected on heat exchange base plate with screw and lower hole centering.
As a further improvement on the present invention, in one or above installation of sensors cover, be provided with sensor device, sensor device comprises displacement transducer and adjusting sleeve, adjusting sleeve main body is external thread right cylinder, external thread size and lower hole screw thread match, adjusting sleeve top is long blind hole, bottom is provided with central through hole, length is greater than displacement transducer length, displacement transducer is arranged in adjusting sleeve, displacement sensor probe stretches out central through hole, adjusting sleeve bottom screws in lower hole, described installation of sensors set upper side is stretched out on adjusting sleeve top, the second set nut coordinates with sensor adjusting sleeve external thread, lock sensor adjusting sleeve main body.
As a further improvement on the present invention, described sensor adjusting sleeve upper end sidewall is provided with holding screw threaded hole, and holding screw screws in threaded hole and withstands sensor, prevents that sensor from moving in adjusting sleeve.
As a further improvement on the present invention, in one or above described installation of sensors cover, be provided with filling post, filling column bottom is provided with and the corresponding screw thread in lower hole.Correspondence does not have the installation of sensors cover of sensor installation, central through hole makes heat interchange base plate contact with outside air, can produce temperature leak, at these installation of sensors covers, places filling post, filling column bottom screw thread coordinates with lower hole in screw-in installation of sensors cover, hinders temperature leak.
As a further improvement on the present invention, described sensor adjusting sleeve upper end grows in the space of sensor and is filled with polyurethane sponge insulation material.For preventing temperature, by sensor, conduct.
As a further improvement on the present invention, described seal case is comprised of the heat interchange base plate of polyoxymethylene sheet material and aluminum alloy materials.
As a further improvement on the present invention, described the first set nut, the second set nut and filling post adopt polyformaldehyde material or organic glass to make.Selecting polyoxymethylene and organic glass is all because this bi-material pyroconductivity is low, can effectively stop and contact with it the loss of parts temperature conduction.
Beneficial effect of the present invention is:
1. by heat-exchange system base plate and cover plate perforate, and sensor installation installation sleeve, for displacement transducer provides installation passage in the airtight casing of heat-exchange system.
2. utilize the screw-in in sensor adjusting sleeve external thread and lower hole to screw out, adjust flexibly the extension elongation of sensor in model casing, facilitate installation of sensors.
3. selecting the low material of conductivity effectively to hinder temperature in heat-exchange system runs off by installation of sensors.
Freeze thawing centrifugal model box structure of the present invention is reasonable, being convenient to displacement transducer installs, can realize sensor and adjust flexibly elongation, meet different soils model depth requirements, and utilize the low materials of pyroconductivity such as polyoxymethylene, organic glass, polystyrene heat-preservation particle and polyurethane sponge effectively to hinder temperature in heat-exchange system by sensor or air, outwards to conduct loss, warranty test condition; Displacement sensor device processing, easy to use.
Accompanying drawing explanation
Fig. 1 is the installation of sensors pore structure schematic diagram of the freeze thawing centrifugal mold molding box in embodiment of the present invention freeze thawing distortion centrifuge modelling system;
Fig. 2 is displacement transducer scheme of installation and filling post scheme of installation in the embodiment of the present invention;
Fig. 3 is the A portion enlarged drawing of Fig. 2;
Fig. 4 is the B portion enlarged drawing of Fig. 3;
Fig. 5 is holding screw profile schematic diagram;
Fig. 6 is the second locking nut structure schematic diagram;
Fig. 7 is sensor adjusting sleeve structural representation;
Fig. 8 is installation of sensors cover front elevation;
Fig. 9 is that installation of sensors overlaps left pseudosection.
In figure: the freeze thawing centrifugal mold molding box in 1-soil model, 2-model casing, 3-heat interchange base plate, 4-polystyrene heat-preservation particle, 5-heat interchange top cover, 6-semiconductor devices 7-filling post, 8-displacement transducer, 9-installation of sensors cover, 10-the first set nut 11-the second set nut 12-sensor adjusting sleeve 13-polyurethane sponge insulation material 14-sensor wire 15-sensor probe 16-holding screw 17-probe external part 18-set screw hole 19-leading-out terminal 100-freeze thawing distortion centrifuge modelling system.
Embodiment
Below in conjunction with drawings and Examples, be described further
As shown in Figure 1, freeze thawing centrifugal mold molding box 100 in freeze thawing distortion centrifuge modelling system, comprises heat-exchange system 30 and model casing 2, and model casing 2 is the body structures with heat-insulating property, in model casing 2, be provided with soil model 1, the case mouth of heat-exchange system 30 overlay model casees 2.Heat-exchange system 30 is comprised of seal case 31 and the polylith semiconductor devices 6 being arranged in seal case 31.The heat interchange base plate 3 of heat interchange top cover 32, frame and the aluminum alloy materials of polyoxymethylene sheet material forms rectangular parallelepiped seal case 31.Polylith semiconductor devices 6a, 6b, 6c, 6d is spaced on heat interchange base plate 3, and with heat interchange base plate 3 close-coupled.All the other space-filling polystyrene heat-preservation particulate materials 4 in seal case 31, to avoid the temperature of heat interchange base plate upwards to run off.6a between polylith semiconductor devices, 6b, 6c, 6d is provided with some installation of sensors hole 21a every the seal case of locating, 21b, 21c, installation of sensors hole 21a, 21b, 21c is comprised of the lower hole 24 corresponding with heat interchange base plate, the upper hole 23 on heat interchange top cover 31, lower hole 24 is threaded hole, installation of sensors hole 21a, 21b, in 21c, be provided with the installation of sensors cover 9 of polyformaldehyde material, in installation of sensors cover 9, it is a through hole, clear size of opening is slightly larger than the lower hole 24 on heat interchange base plate, installation of sensors overlaps 9 upper ends through upper hole 23, and be fixed on heat interchange top cover 31, bottom is fixed on heat interchange base plate 3 upper surfaces of lower hole periphery.
As Fig. 1, 3, shown in 8 and 9, for sensor can be passed, in installation of sensors cover 9, it is a through hole, clear size of opening is slightly larger than the lower hole 24 on base plate, installation of sensors cover bottom 91 is provided with square flange 92, square flange 92 use screws connect with the threaded hole centering of heat interchange base plate 9, upper end 93 is through the upper hole 23 of top cover, above hole 23 for being slightly larger than the through hole that installation of sensors overlaps 9 external diameters, installation of sensors set upper side 93 passes top cover 31 parts and is provided with external thread 94, so that the first set nut 10 of polyformaldehyde material is locked top cover 31 and installation of sensors cover 9.
As shown in Fig. 2,3 and 7, for realizing the extension elongation of displacement transducer 8 in model casing 2 casings, can adjust flexibly the sensor adjusting sleeve 12 of a pmma material of design.Displacement transducer 8 is direct current back springing type displacement transducer, belongs to differential transformation type displacement sensor (LVDT), and contour structures is the right cylinder of 304 stainless steel materials, and right cylinder front end is back springing type probe 15, and rear end is cable 14.As Fig. 7, sensor adjusting sleeve 12 main bodys are external thread right cylinder, lower hole 24 internal threads of external thread 121 sizes and base plate match, in sensor adjusting sleeve 12, be provided with long blind hole 122, for convenience of sensor, pack into, blind hole 122 diameter dimensions are slightly larger than sensor 8 right cylinder external diameters, and sensor adjusting sleeve 12 bottom centre have an aperture 17, aperture 17 sizes are slightly larger than sensor probe 15 external diameters, so that sensor probe 15 stretches out.Sensor adjusting sleeve 12 bottoms screw in lower hole 24, installation of sensors cover 9 is stretched out in sensor adjusting sleeve 12 upper ends, the second set nut 11 of being made by pmma material locks adjusting sleeve with sensor adjusting sleeve external thread 121, and the second set nut 11 as shown in Figure 6.Sensor wire 14 is drawn from blind hole leading-out terminal 19, and because cable is thinner, sensor adjusting sleeve 12 tops have redundant space, for preventing that temperature from being conducted by sensor, packs polyurethane sponge insulation material 13 in unnecessary space into.As Fig. 3,4 and 5, for preventing that displacement transducer 8 from relatively moving in sensor adjusting sleeve 12, in sensor adjusting sleeve 12, be provided with set screw hole 18, after the holding screw 16 that pmma material is made screws in, displacement transducer 8 is withstood, prevent that it from moving.
As shown in Figure 2, in test, do not have the installation of sensors hole of sensor installation that heat interchange base plate 3 is contacted with outside air, can produce temperature leak, designed the filling post 7 of pmma material for this reason, filling post 7 packs in installation of sensors cover 12, filling post 7 bottom thread match with hole 24 screw threads under heat interchange base plate, hinder temperature leak.
In embodiment, selecting polyoxymethylene and organic glass is all because this bi-material pyroconductivity is low as component materials, can effectively stop and contact with it the loss of parts temperature conduction.
After the interior soil model of model casing 2 is made, heat-exchange system 30 is in place.Now just can according to test need to be at displacement test point sensor installation 8, first sensor 8 is packed in sensor adjusting sleeve 12, allow sensor probe 15Cong adjusting sleeve bottom centre hole 17 stretch out, then in the set screw hole 18 holding screw 16 being screwed in adjusting sleeve, after sensor 8 is held out against and can not be moved, just sensor adjusting sleeve 12 can be inserted together with sensor 8 to installation of sensors cover 9, in lower hole 24 threaded holes of the heat interchange aluminum alloy bottom plate 3 of sensor adjusting sleeve 12 bottoms screw-in heat-exchange systems 30, utilize 12 precessions of sensor adjusting sleeve and back-out to adjust the extension elongation of sensor 8 in model casing 2, according to probe 15 compression position cable output signals to determine the final position of sensor adjusting sleeve 12, the second set nut 11 lock sensor adjusting sleeves 12, make sensor adjusting sleeve 12 and sensor 8 be fixed in this position, place, in the line outlet of sensor adjusting sleeve 12 upper ends, pack polyurethane sponge insulation material 13 into.Finally, in installation of sensors 12 cover of sensor 8 is not set, pack filling post 7 into, and with heat interchange aluminum alloy bottom plate under hole 24 screw.
Claims (9)
1. the freeze thawing centrifugal mold molding box in centrifuge modelling system is out of shape in freeze thawing, comprise the heat exchange series model casing of unifying, the case mouth of described heat-exchange system overlay model case, heat-exchange system is comprised of seal case and the polylith semiconductor devices being arranged in seal case, polylith semiconductor devices is spaced on heat interchange base plate, and with heat interchange bottom plate connecting; It is characterized in that, on the seal case at polylith semiconductor devices interval, be provided with some installation of sensors hole, installation of sensors hole is comprised of the lower hole corresponding with heat interchange base plate, the upper hole on heat interchange top cover, lower hole is threaded hole, in each installation of sensors hole, be provided with installation of sensors cover, in installation of sensors cover, it is a through hole, clear size of opening is slightly larger than the lower hole on heat interchange base plate, installation of sensors set upper side is through upper hole, and be fixed on heat interchange top cover, bottom is fixed on the heat interchange plate upper surface of lower hole periphery.
2. freeze thawing centrifugal mold molding box according to claim 1, is characterized in that, described installation of sensors set upper side passes header field and is provided with external thread, and the first set nut is fixed top cover and installation of sensors cover locking.
3. freeze thawing centrifugal mold molding box according to claim 1, is characterized in that, described seal case is comprised of the heat interchange base plate of polyoxymethylene sheet material and aluminum alloy materials.
4. freeze thawing centrifugal mold molding box according to claim 2, is characterized in that, described installation of sensors cover bottom is provided with flange, and flange is connected in heat exchange base plate with screw and lower hole centering.
5. freeze thawing centrifugal mold molding box according to claim 2, it is characterized in that, in one or above installation of sensors cover, be provided with sensor device, sensor device comprises displacement transducer and sensor adjusting sleeve, sensor adjusting sleeve main body is external thread right cylinder, external thread size and lower hole screw thread match, sensor adjusting sleeve top is long blind hole, bottom is provided with central through hole, length is greater than displacement transducer length, displacement transducer is arranged in adjusting sleeve, displacement sensor probe stretches out central through hole, adjusting sleeve bottom screws in lower hole, described installation of sensors set upper side is stretched out on adjusting sleeve top, the second set nut coordinates with sensor adjusting sleeve external thread, lock sensor adjusting sleeve main body.
6. freeze thawing centrifugal mold molding box according to claim 5, is characterized in that, described sensor adjusting sleeve upper end sidewall is provided with holding screw threaded hole, and holding screw screws in screw thread hole and withstands sensor.
7. freeze thawing centrifugal mold molding box according to claim 5, is characterized in that, is not provided with in the described installation of sensors cover of sensor device and is provided with filling post, and filling column bottom is provided with and the corresponding screw thread in lower hole.
8. freeze thawing centrifugal mold molding box according to claim 5, is characterized in that, described sensor adjusting sleeve upper end arranges in the space of sensor wire and is filled with polyurethane sponge insulation material.
9. freeze thawing centrifugal mold molding box according to claim 5, is characterized in that, described the first set nut, the second set nut and filling post adopt polyformaldehyde material or organic glass to make.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410299743.3A CN104034863B (en) | 2014-06-26 | 2014-06-26 | Freeze thawing centrifugal mold molding box in freeze thawing distortion centrifuge modelling system |
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| CN201410299743.3A CN104034863B (en) | 2014-06-26 | 2014-06-26 | Freeze thawing centrifugal mold molding box in freeze thawing distortion centrifuge modelling system |
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| CN104034863A true CN104034863A (en) | 2014-09-10 |
| CN104034863B CN104034863B (en) | 2015-10-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973746A (en) * | 2016-01-25 | 2016-09-28 | 天津城建大学 | Apparatus for testing unfrozen water content of frozen soil, and method thereof |
| CN110133225A (en) * | 2019-05-23 | 2019-08-16 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of experimental rig and test method of the performance analysis fisstured flow of centrifuge modelling drought and waterlogging racing |
| CN110133219A (en) * | 2019-05-15 | 2019-08-16 | 水利部交通运输部国家能源局南京水利科学研究院 | Soil body freeze thawing is eroded simulating on coupling loading device under a kind of centrifugal field |
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| CN203981667U (en) * | 2014-06-26 | 2014-12-03 | 中国工程物理研究院总体工程研究所 | Freeze thawing centrifugal mold molding box in freeze thawing distortion centrifuge modelling system |
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2014
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105973746A (en) * | 2016-01-25 | 2016-09-28 | 天津城建大学 | Apparatus for testing unfrozen water content of frozen soil, and method thereof |
| CN110133219A (en) * | 2019-05-15 | 2019-08-16 | 水利部交通运输部国家能源局南京水利科学研究院 | Soil body freeze thawing is eroded simulating on coupling loading device under a kind of centrifugal field |
| CN110133225A (en) * | 2019-05-23 | 2019-08-16 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of experimental rig and test method of the performance analysis fisstured flow of centrifuge modelling drought and waterlogging racing |
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