CN203465145U - Test auxiliary device for testing tensile strength of rock by virtue of Brazilian method - Google Patents
Test auxiliary device for testing tensile strength of rock by virtue of Brazilian method Download PDFInfo
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- CN203465145U CN203465145U CN201320622241.0U CN201320622241U CN203465145U CN 203465145 U CN203465145 U CN 203465145U CN 201320622241 U CN201320622241 U CN 201320622241U CN 203465145 U CN203465145 U CN 203465145U
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Abstract
The utility model discloses a test auxiliary device for testing the tensile strength of rock by virtue of a Brazilian method and relates to the technical field of rock mechanics tests. The test auxiliary device comprises a pedestal (1), a cushion block (2), an upper cushion strip (6), a lower cushion strip (7), upright posts (4), a positioning frame (3) and springs (5). The test auxiliary device is simple in structure and skillful in design; the positioning frame of which the inner part is hollow and trapezoidal is designed, the cushion blocks act on a column-shaped test piece to enable the test piece to downwards move into the positioning frame along the self-gravity, the centering position of the test piece is regulated until the bottom of the test piece is stably contacted with the lower cushion strip, the automatic debugging of the position of the test piece is finished, and the manual debugging is omitted; the positioning frame is contacted with the test piece and plays a leading role in the regulation of the centering position before the test, and but the acting force of the positioning frame can be ignored relative to the acting force after the test is carried out, so that after being accurately positioned, the test auxiliary device is precise in test data and small in error, is convenient to dismount and does not need to be manually debugged, and the testing efficiency is increased.
Description
Technical field
The utility model relates to rock mechanics experiment technical field, specifically a kind of experiment auxiliary device for Brazilian method test Tensile Strength of Rock.
Background technology
Tensile Strength of Rock refers to the ultimate stress value of rock sample when pulling force effect is issued to destruction.The tensile strength of rock is little more than compressive strength, and therefore at aspects such as Rock penetrating, explosion, underground workss, Tensile Strength of Rock is an indispensable important parameter.
Tensile Strength of Rock test method can be divided direct method and indirect method two classes.Direct method is with similar for the method for metallographictest.This testing requirements clamper does not damage test specimen surface, and imposed load should strictly parallel with test specimen axle, in order to avoid produce the crooked stress causing, concentrates.This method kind of indirect method is more, and conventional have a radially Splitting Method of disk, right cylinder.Disk diameter is famous " Brazilian method " to Splitting Method, uses a solid disk, makes it to be subject to radial compression and destroys, and asks tensile strength.Right cylinder radially Splitting Method is normally asked tensile strength with two contact point pair right cylinder pressurizations.
In < < Hydraulic and Hydro-Power Engineering rock test rules SL264-2001 > >, stipulate: by the two ends of test specimen diameter, in the side of test specimen, along axis direction, draw two and load baseline, two filler strips are fixed along loading baseline.For hard and harder rock, should select diameter is that 1mm steel wire is filler strip, for weak and should to select compared with loosened rock cardboard or the spline that width and test specimen diameter ratio are 0.08-0.1 be filler strip.Test specimen is placed in to testing machine bearing plate center, adjusts spheric seat, make test specimen uniform stressed, acting force is by two determined planes of pad; In < < Standard for test methods of engineering rock masses GB/T50266-99 > >, stipulate: by the two ends of test specimen diameter, along axis direction, draw two loading baselines that are parallel to each other.2 filler strips, along loading baseline, are fixed on to test specimen two ends.Test specimen is placed in to testing machine bearing plate center, adjusts spheric seat, make the even load-bearing of test specimen, and make filler strip and test specimen on same loading axis.
The Tensile Strength of Rock determinator (Fig. 4-8) of showing in Fu Zhiliang chief editor's < < rock mechanics experiment study course > > mono-book, because rock stress surface is too large, can increase test error; In < < rock mass mechanics > > mono-book that the people such as Shen Mingrong ,Chen Jian peak write, to us, shown the simplest a kind of test unit (Fig. 2-7), but because needing laboratory technician, manually corrects in this device, therefore result is not fine, can cause larger error.
The Yang Chun of Wuhan Inst. of Rock and Soil Mechanics, Chinese Academy of Sciences and people's such as grade splitting is sent out the piece fixture (CN101936851 A) of mensuration Tensile Strength of Rock although improved test unit, improved test accuracy, but clamp structure is more complicated, and due to the connected meeting of connecting rod remote effect test accuracy.
Summary of the invention
For solving the technical matters of above-mentioned existence, the utility model provides a kind of experiment auxiliary device for Brazilian method test Tensile Strength of Rock, simple in structure, lower to operating personnel's operative skill requirement, meets industry standard requirement, and warranty test data are accurate.
For achieving the above object, the technical scheme that the utility model adopts is:
A kind of experiment auxiliary device for Brazilian method test Tensile Strength of Rock, comprise base, cushion block, upper filler strip and lower filler strip, also comprise column, locating rack and spring, described column is set to two, and be symmetrically fixed on the centre position, two ends of base, on described two columns, be arranged with respectively spring, the inner space of described locating rack is set to the wide at the top and narrow at the bottom trapezoidal hollow suitable with right cylinder test specimen, and the two ends of described locating rack are arranged on two columns, the middle part, bottom surface of described cushion block is fixedly installed the upper filler strip that protrudes from bottom surface, described base upper surface is fixed with the vertical corresponding position of upper filler strip the lower filler strip that protrudes from upper surface, on described cushion block, be provided with and two holes that column is suitable, right cylinder test specimen is put into after locating rack, cushion block is arranged at the top of right cylinder test specimen through column.
On described base, be provided with two spring grooves, described column is fixed in base through spring groove, and described spring housing is located on column and its bottom is fixedly installed in spring groove.
The position corresponding with lower filler strip, the bottom of described locating rack offers groove, and described lower filler strip embeds in locating rack.
The internal surface of hole being connected between described column and cushion block, locating rack is smooth, and described cushion block and locating rack can be free to slide and close contact along column.
The outside surface of described base, locating rack and cushion block is the relative consistent regular rectangular parallelepiped in bottom surface.
The utility model is simple in structure, design ingenious, designed the locating rack of inner trapezoidal hollow, by cushion block, act on right cylinder test specimen, test specimen is moved downward to locating rack with self gravitation, adjust the centering position of test specimen, until contact lower filler strip in test specimen bottom is stable, test specimen position automatic Debugging finishes, without manual debugging, although locating rack contacted with test specimen before test, play the leading role that regulates centering position, but the acting force of its acting force after with respect to on-test can be ignored, test figure after accurate positioning is accurate, error is little, easy accessibility, without manual debugging, improve testing efficiency.
Accompanying drawing explanation
Fig. 1 is the utility model one-piece construction schematic diagram;
Fig. 2 is profile schematic diagram of the present utility model;
Fig. 3 is the structural representation of the utility model locating rack.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail:
Be a specific embodiment of the present utility model as Figure 1-3, should, for the experiment auxiliary device of Brazilian method test Tensile Strength of Rock, comprise base 1, cushion block 2, upper filler strip 6 and lower filler strip 7, column 4, locating rack 3 and spring 5.
Described column 4 is set to two, and be symmetrically fixed on the centre position, two ends of base 1, on described two columns 4, be arranged with respectively spring 5, stability in order to ensure spring 5, on described base 1, be provided with two spring grooves, described column 4 is fixed in base 1 through spring groove, selects the mode vertical columns 4 of welding in the present embodiment, and described spring 5 is arranged in spring groove through on column 4.
The inner space of described locating rack 3 is set to the wide at the top and narrow at the bottom trapezoidal hollow suitable with right cylinder test specimen, the two ends of described locating rack 3 are arranged on two columns 4, it is smooth with the internal surface of hole that column 4 contacts, and coating lubricating oil before test, guarantees that locating rack 3 slides freely and close contact on column 4.
The middle part, bottom surface of described cushion block 2 is fixedly installed the upper filler strip 6 that protrudes from bottom surface, described base 1 upper surface is fixed with the vertical corresponding position of upper filler strip 6 the lower filler strip 7 that protrudes from upper surface, the fixing of upper filler strip 6 and lower filler strip 7 can be selected the embedded of routine, as the present embodiment, be to offer respectively groove at the middle part, bottom surface of cushion block 2 and the upper surface relative position of base 1, two filler strips are positioned in groove respectively.On described cushion block 2, be provided with and two holes that column 4 is suitable, right cylinder test specimen is put into after locating rack 3, cushion block 2 is arranged at the top of right cylinder test specimen through column 4, described cushion block 2 is smooth with the internal surface of hole that column 4 contacts, and coating lubricating oil before test, guarantees that cushion block 2 is free to slide and close contact on column 4.
In order to coordinate the position of the lower filler strip 7 on base 1, the position corresponding with lower filler strip 7, the bottom of described locating rack 3 offers groove.
As preferred mode, the outside surface of described base 1, locating rack 3 and cushion block 2 is the relative consistent regular rectangular parallelepiped in bottom surface, guarantees that the coordination of this device profile is attractive in appearance, easy to operate.
The utility model in use, lower filler strip 7 is embedded in base 1 filler strip groove, two springs 5 are put in spring groove by column 4, locating rack 3 is contacted with base 1 by spring 5 through column 4, then test specimen 8 is positioned in locating rack 3, test specimen 8 will inevitably contact with two faces in locating rack 3 under the effect of gravity, the diameter of test specimen 8 is by by the axis of device like this, guaranteed the correct placement of test specimen 8 positions, finally upper filler strip 6 is put in the filler strip groove of cushion block 2, cushion block 2 is placed on test specimen 8 and can starts prestrain through column 4.After prestrain starts, at the effect lower cushion block 2 of pressure, will force by test specimen 8 that locating rack 3 is stressed to be moved downward, when test specimen 8 by top when contacting with lower filler strip 7, although but there is power with locating rack 7 be minimum in test specimen 8 now, negligible, test specimen 8 is now mainly subject to the effect of upper and lower two filler strips, starts subsequently official test.
The test specimen that test is used requires identical with the test specimen standard of < < Standard for test methods of engineering rock masses GB/T50266-99 > > with < < Hydraulic and Hydro-Power Engineering rock test rules SL264-2001 > >, the precision of warranty test.
Use the present invention to carry out the type testing step of tensile test:
1, between the upper push-down head of pressure testing machine, place this device;
2, test specimen 8 is put on locating rack 3, cushion block 2 is pressed on test specimen 8 by upper filler strip 6.
3, starting characteristics test machine, starts prestrain, stops prestrain when pressure reaches 0.2KN, and now test specimen is almost only subject to upper and lower filler strip effect.
4, start official test, until there is curve peak, test specimen is along the diameter line splitting of upper and lower filler strip.
5, off-test, takes out test specimen.
Certainly; above-mentioned explanation is not to restriction of the present utility model; the utility model is also not limited in above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also should belong to protection domain of the present utility model.
Claims (5)
1. the experiment auxiliary device for Brazilian method test Tensile Strength of Rock, comprise base (1), cushion block (2), upper filler strip (6) and lower filler strip (7), it is characterized in that, also comprise column (4), locating rack (3) and spring (5), described column (4) is set to two, and be symmetrically fixed on the centre position, two ends of base (1), on described two columns (4), be arranged with respectively spring (5), the inner space of described locating rack (3) is set to the wide at the top and narrow at the bottom trapezoidal hollow suitable with right cylinder test specimen, and the two ends of described locating rack (3) are arranged on two columns (4), the middle part, bottom surface of described cushion block (2) is fixedly installed the upper filler strip (6) that protrudes from bottom surface, described base (1) upper surface is fixed with the vertical corresponding position of upper filler strip (6) the lower filler strip (7) that protrudes from upper surface, on described cushion block (2), be provided with the hole suitable with two columns (4), right cylinder test specimen is put into after locating rack (3), cushion block (2) is arranged at the top of right cylinder test specimen through column (4).
2. the experiment auxiliary device for Brazilian method test Tensile Strength of Rock according to claim 1, it is characterized in that, on described base (1), be provided with two spring grooves, described column (4) is fixed in base (1) through spring groove, and described spring (5) is sheathed on column (4) above and its bottom is fixedly installed in spring groove.
3. the experiment auxiliary device for Brazilian method test Tensile Strength of Rock according to claim 1, it is characterized in that, the position corresponding with lower filler strip (7), the bottom of described locating rack (3) offers groove, and described lower filler strip (7) embeds in locating rack (3).
4. the experiment auxiliary device for Brazilian method test Tensile Strength of Rock according to claim 1, it is characterized in that, the internal surface of hole being connected between described column (4) and cushion block (2), locating rack (3) is smooth, and described cushion block (2) and locating rack (3) can be free to slide and close contact along column (4).
5. according to the experiment auxiliary device for Brazilian method test Tensile Strength of Rock described in claim 1,2,3 or 4, it is characterized in that, the outside surface of described base (1), locating rack (3) and cushion block (2) is the relative consistent regular rectangular parallelepiped in bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320622241.0U CN203465145U (en) | 2013-10-10 | 2013-10-10 | Test auxiliary device for testing tensile strength of rock by virtue of Brazilian method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320622241.0U CN203465145U (en) | 2013-10-10 | 2013-10-10 | Test auxiliary device for testing tensile strength of rock by virtue of Brazilian method |
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| Publication Number | Publication Date |
|---|---|
| CN203465145U true CN203465145U (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320622241.0U Withdrawn - After Issue CN203465145U (en) | 2013-10-10 | 2013-10-10 | Test auxiliary device for testing tensile strength of rock by virtue of Brazilian method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471909A (en) * | 2013-10-10 | 2013-12-25 | 山东科技大学 | Test auxiliary device for testing tensile strength of rock through Brazilian test |
| CN104596850A (en) * | 2015-02-03 | 2015-05-06 | 中国电建集团成都勘测设计研究院有限公司 | Rock axial tension test device and rock axial tension test device |
| CN106644719A (en) * | 2016-12-20 | 2017-05-10 | 安徽理工大学 | Rock tensile strength test apparatus capable of applying confining pressure |
| CN106769448A (en) * | 2016-11-29 | 2017-05-31 | 大同市焦煤矿有限责任公司 | A kind of mould of Brazilian diametral compression test |
| CN109115608A (en) * | 2018-09-21 | 2019-01-01 | 三峡大学 | A kind of more size adjustable rock cleavage test boxs and method |
-
2013
- 2013-10-10 CN CN201320622241.0U patent/CN203465145U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471909A (en) * | 2013-10-10 | 2013-12-25 | 山东科技大学 | Test auxiliary device for testing tensile strength of rock through Brazilian test |
| CN103471909B (en) * | 2013-10-10 | 2015-07-15 | 山东科技大学 | Test auxiliary device for testing tensile strength of rock through Brazilian test |
| CN104596850A (en) * | 2015-02-03 | 2015-05-06 | 中国电建集团成都勘测设计研究院有限公司 | Rock axial tension test device and rock axial tension test device |
| CN106769448A (en) * | 2016-11-29 | 2017-05-31 | 大同市焦煤矿有限责任公司 | A kind of mould of Brazilian diametral compression test |
| CN106769448B (en) * | 2016-11-29 | 2019-08-13 | 大同市焦煤矿有限责任公司 | A kind of mold of Brazil's diametral compression test |
| CN106644719A (en) * | 2016-12-20 | 2017-05-10 | 安徽理工大学 | Rock tensile strength test apparatus capable of applying confining pressure |
| CN106644719B (en) * | 2016-12-20 | 2019-02-05 | 安徽理工大学 | A kind of Tensile Strength of Rock test device adding confining pressure |
| CN109115608A (en) * | 2018-09-21 | 2019-01-01 | 三峡大学 | A kind of more size adjustable rock cleavage test boxs and method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140305 Effective date of abandoning: 20150715 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140305 Effective date of abandoning: 20150715 |
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| RGAV | Abandon patent right to avoid regrant |