CN103235002A - Indoor testing apparatus for thermal expansion coefficient of rock sample - Google Patents
Indoor testing apparatus for thermal expansion coefficient of rock sample Download PDFInfo
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- CN103235002A CN103235002A CN201310112821XA CN201310112821A CN103235002A CN 103235002 A CN103235002 A CN 103235002A CN 201310112821X A CN201310112821X A CN 201310112821XA CN 201310112821 A CN201310112821 A CN 201310112821A CN 103235002 A CN103235002 A CN 103235002A
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- furnace wall
- top cover
- testing apparatus
- expansion coefficient
- thermal expansion
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Abstract
The invention relates to a testing apparatus for the thermal expansion coefficient of a rock sample, which belongs to the field of test instruments. The testing apparatus comprises a pedestal, an oil delivery channel, a furnace wall, a top cover, an electrical bar and a strain rod, wherein the furnace wall is hollow, an objective table is arranged on the pedestal, the pedestal is in fixed connection with the lower end surface of the furnace wall through a fastening screw, the upper end of the furnace wall is provided with the top cover, the top cover is provided with the electrical bar, and the lower end of the electrical bar is placed in a furnace chamber. The testing apparatus provided by the invention employs an assembling connection structure and a built-in oil heating mode, uniform heating of a to-be-tested rock sample can be realized through usage of the built-in oil heating mode, and since the strain rod is provided with a matching high precision strain gage, axial expansion strain of the to-be-tested rock sample after heating can be sensitively measured. The testing apparatus has the advantages of a reasonable structure, convenience in assembling connection, simple operation and capacity of measuring the thermal expansion coefficient of a rock; the built-in oil heating mode enables a high heating temperature to be obtained; and the high precision strain gage is cooperatively used for the testing apparatus, which facilitates measurement of the thermal expansion coefficient of the rock and enables high test precision to be obtained.
Description
Technical field
The present invention relates to a kind of rock thermal expansion coefficient testing device, belong to the testing tool class.
Background technology
Along with the continuous development in Geotechnical Engineering field, increasing engineering relates to the thermosetting coupled problem of ground, therefore, considers that the mechanical characteristic evolution rule of the rock under the temperature action just becomes particularly important.Yet, determine the mechanics parameter under the temperature action, the thermal expansivity of rock is an indispensable parameter.And at present in order to test the device of rock fever expansion coefficient, major part is not suitable for the thermal expansivity of measuring rock, and some adopts contactless measurement, utilizes optical signalling to measure the principle complexity; The use of some instrument needs two samples to compare, and in the measuring process, personal error is bigger.
Summary of the invention
At above-mentioned existing problems, the objective of the invention is to be to provide the device of test rock fever expansion coefficient a kind of simple in structure, easy to use, practical, to achieve these goals, the present invention by the following technical solutions:
A kind of rock thermal expansion coefficient testing device, described proving installation is by base, oil transportation channel, the furnace wall, top cover, electrical bar, the strain bar is formed, the furnace wall is hollow form, base is provided with objective table, objective table is positioned at the base center, base is fixedlyed connected by trip bolt with the lower surface, furnace wall, asking of base and furnace wall surface of contact is provided with first O-ring seal, base is provided with oil transportation channel, the upper surface of furnace wall is provided with top cover, is connected by bolt between top cover and the furnace wall, is provided with second O-ring seal between the surface of contact of top cover and furnace wall, the top cover center is provided with a through hole, through hole is passed in the activity of strain bar, and its lower end places among the furnace chamber, and symmetry has mounting hole on the top cover, electrical bar is installed in the mounting hole, and its lower end places among the furnace chamber.
The lower end of described strain bar is provided with pressure head.
Adopted above technical scheme, this rock thermal expansion coefficient testing device has following advantage:
Proving installation of the present invention adopts connecting structure and built-in oily type of heating, connecting structure can make things convenient for the installation of rock sample, built-in oily type of heating can evenly heat the rock sample of testing, the strain bar is equipped with the high precision foil gauge, axially expansion strain after comparatively the measurement rock sample of sensitivity is heated.
The present invention is rational in infrastructure, and winding is convenient, and is simple to operate, can be used in the thermal expansivity of measuring rock, built-in oily type of heating has than higher heating-up temperature, and proving installation cooperates the high precision foil gauge, be convenient for measuring the thermal expansivity of rock, and the measuring accuracy height.
Description of drawings
Fig. 1 is the structural representation of proving installation of the present invention;
Fig. 2 is the structural representation of base;
Fig. 3 is the structural representation of top cover;
Embodiment
The present invention is further described below in conjunction with accompanying drawing.
See accompanying drawing,
A kind of rock thermal expansion coefficient testing device, described proving installation is by base 1, oil transportation channel 2, furnace wall 5, top cover 8, electrical bar 10, strain bar 11 is formed, furnace wall 5 is hollow form, base 1 is provided with objective table 4, objective table 4 is positioned at base 1 center, in order to settle rock sample 7, base 1 is fixedlyed connected by trip bolt 6 with 5 lower surfaces, furnace wall, be provided with first O-ring seal 3 between base 1 and furnace wall 5 surface of contact, first O-ring seal 3 is arranged in the seal groove of base 1 and furnace wall 5, prevent that fluid from leaking outside, base 1 is provided with oil transportation channel 2, oil is from oil transportation channel 2 opening parts input furnace chamber, the upper surface of furnace wall 5 is provided with top cover 8, be connected by bolt 9 between top cover 8 and the furnace wall 5, be provided with second O-ring seal 12 between the surface of contact of top cover 8 and furnace wall 5, second O-ring seal 12 is arranged in the seal groove of furnace wall 5 and top cover 8, top cover 8 centers are provided with a through hole, through hole is passed in 11 activities of strain bar, its lower end places among the furnace chamber, strain bar 11 lower ends are equipped with pressure head, the size of pressure head and the rock sample of testing 7 matches, symmetry has mounting hole on the top cover 8, and electrical bar 10 is installed in the mounting hole, and its lower end places among the furnace chamber, top cover 8 is provided with a vent port 13, in the test, when filling with oil in the furnace chamber, vent port 13 usefulness rubber plugs seal.
Principle of work of the present invention:
(1) rock sample 7 is packaged after, be placed on the objective table 4, sample thermopair 15 is installed on rock sample 7 surfaces.Pressure head is placed the upper surface of rock sample 7, testing tool is assembled.
(2) combined closely in strain bar 11 lower ends and pressure head, strain bar 11 upper ends contact with the sheet metal 14 that posts the high precision foil gauge, and sheet metal 14 is fixed by Magnetic gauge stand.
(3) furnace temperature thermopair 16 is installed on the electrical bar 10, and electrical bar 10 is inserted in the furnace chamber.
(3) with liquid from oil transportation channel 2, input is advanced in the furnace chamber, treat that liquid is full of furnace chamber after, oil transportation channel 2, gas outlet 13 usefulness rubber plugs are sealed.
(4) earlier the high precision foil gauge on the top metal sheet 14 is connected with electric wire strain gauge, afterwards with electrical bar 10 and power connection.
(5) obtain the temperature of furnace chamber and rock sample 7 according to sample thermopair 15 and furnace temperature thermopair 16, and measure the axial strain Δ L of rock sample according to electric wire strain gauge, at last formula rule of thumb
Calculate the thermal expansivity of rock sample 7 under the temperature variation.
Claims (2)
1. rock thermal expansion coefficient testing device, it is characterized in that: described proving installation is by base (1), oil transportation channel (2), furnace wall (5), top cover (8), electrical bar (10), strain bar (11) is formed, furnace wall (5) is hollow form, base (1) is provided with objective table (4), objective table (4) is positioned at base (1) center, base (1) is fixedlyed connected by trip bolt (6) with lower surface, furnace wall (5), be provided with first O-ring seal (3) between base (1) and furnace wall (5) surface of contact, base is provided with oil transportation channel (2), the upper surface of furnace wall (5) is provided with top cover (8), be connected by bolt (9) between top cover and furnace wall (5), be provided with second O-ring seal (12) between the surface of contact of top cover and furnace wall, top cover (8) center is provided with a through hole, through hole is passed in strain bar (11) activity, and its lower end places among the furnace chamber, and top cover (8) is gone up symmetry and had mounting hole, electrical bar (10) is installed in the mounting hole, and its lower end places among the furnace chamber.
2. a kind of rock thermal expansion coefficient testing device according to claim 1, it is characterized in that: the lower end of described strain bar (11) is provided with pressure head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310112821XA CN103235002A (en) | 2013-04-02 | 2013-04-02 | Indoor testing apparatus for thermal expansion coefficient of rock sample |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310112821XA CN103235002A (en) | 2013-04-02 | 2013-04-02 | Indoor testing apparatus for thermal expansion coefficient of rock sample |
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| CN103235002A true CN103235002A (en) | 2013-08-07 |
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| CN201310112821XA Pending CN103235002A (en) | 2013-04-02 | 2013-04-02 | Indoor testing apparatus for thermal expansion coefficient of rock sample |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868947A (en) * | 2014-03-31 | 2014-06-18 | 孙东生 | Measurement method and measurement device for 0-60 DEG C rock linear thermal expansion coefficient |
| CN104777186A (en) * | 2015-04-17 | 2015-07-15 | 广西大学 | Device for measuring rock hot line swelling coefficient by using pressure tester |
| CN104897717A (en) * | 2015-03-25 | 2015-09-09 | 中国科学院武汉岩土力学研究所 | Indoor measuring device for axial and radial thermal expansion coefficients of rock sample |
| CN106770431A (en) * | 2017-01-22 | 2017-05-31 | 中国科学院武汉岩土力学研究所 | The Triaxial tester and method of the rock-soil material coefficient of expansion can be tested |
| CN107389725A (en) * | 2017-09-20 | 2017-11-24 | 西安近代化学研究所 | A kind of high explosive powder charge thermal coefficient of expansion measurement apparatus and method |
| CN110988019A (en) * | 2019-12-16 | 2020-04-10 | 中国石油大学(北京) | Testing device and testing method for shale thermal expansion coefficient |
| CN112505090A (en) * | 2020-11-17 | 2021-03-16 | 贵州大学 | Automatic measurement system and method for axial and radial thermal expansion rates of rock sample |
| CN112903740A (en) * | 2021-01-22 | 2021-06-04 | 中国石油大学(华东) | Device and method for measuring thermal expansion coefficient of rock under confining pressure |
| CN114720507A (en) * | 2022-04-07 | 2022-07-08 | 中国长江三峡集团有限公司 | Rock thermal expansion coefficient measuring device and method under in-situ condition |
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| JP2004226369A (en) * | 2003-01-27 | 2004-08-12 | Mitsutoyo Corp | Device for measuring linear expansion coefficient |
| JP2009058326A (en) * | 2007-08-31 | 2009-03-19 | Mitsubishi Materials Corp | Linear expansion coefficient calculating method of hydraulic-setting material and apparatus of the same |
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| JP2012181080A (en) * | 2011-03-01 | 2012-09-20 | National Institute Of Advanced Industrial & Technology | Ultrahigh temperature thermal expansion testing device |
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| JP2004226369A (en) * | 2003-01-27 | 2004-08-12 | Mitsutoyo Corp | Device for measuring linear expansion coefficient |
| JP2009058326A (en) * | 2007-08-31 | 2009-03-19 | Mitsubishi Materials Corp | Linear expansion coefficient calculating method of hydraulic-setting material and apparatus of the same |
| CN101393147A (en) * | 2007-09-20 | 2009-03-25 | 襄樊学院 | Metal linear expansion coefficient measuring apparatus |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868947A (en) * | 2014-03-31 | 2014-06-18 | 孙东生 | Measurement method and measurement device for 0-60 DEG C rock linear thermal expansion coefficient |
| CN104897717A (en) * | 2015-03-25 | 2015-09-09 | 中国科学院武汉岩土力学研究所 | Indoor measuring device for axial and radial thermal expansion coefficients of rock sample |
| CN104777186A (en) * | 2015-04-17 | 2015-07-15 | 广西大学 | Device for measuring rock hot line swelling coefficient by using pressure tester |
| CN104777186B (en) * | 2015-04-17 | 2018-04-13 | 广西大学 | A kind of device using pressure testing machine measurement rock hotline expansion coefficient |
| CN106770431A (en) * | 2017-01-22 | 2017-05-31 | 中国科学院武汉岩土力学研究所 | The Triaxial tester and method of the rock-soil material coefficient of expansion can be tested |
| CN106770431B (en) * | 2017-01-22 | 2023-10-27 | 中国科学院武汉岩土力学研究所 | Triaxial test device and method capable of testing expansion coefficient of rock-soil material |
| CN107389725A (en) * | 2017-09-20 | 2017-11-24 | 西安近代化学研究所 | A kind of high explosive powder charge thermal coefficient of expansion measurement apparatus and method |
| CN110988019A (en) * | 2019-12-16 | 2020-04-10 | 中国石油大学(北京) | Testing device and testing method for shale thermal expansion coefficient |
| CN112505090A (en) * | 2020-11-17 | 2021-03-16 | 贵州大学 | Automatic measurement system and method for axial and radial thermal expansion rates of rock sample |
| CN112903740A (en) * | 2021-01-22 | 2021-06-04 | 中国石油大学(华东) | Device and method for measuring thermal expansion coefficient of rock under confining pressure |
| CN114720507A (en) * | 2022-04-07 | 2022-07-08 | 中国长江三峡集团有限公司 | Rock thermal expansion coefficient measuring device and method under in-situ condition |
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Application publication date: 20130807 |