CN205317585U - Automatic tensile test device of rectifying of rock - Google Patents
Automatic tensile test device of rectifying of rock Download PDFInfo
- Publication number
- CN205317585U CN205317585U CN201620065242.3U CN201620065242U CN205317585U CN 205317585 U CN205317585 U CN 205317585U CN 201620065242 U CN201620065242 U CN 201620065242U CN 205317585 U CN205317585 U CN 205317585U
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- connecting portion
- rock
- automatic deviation
- rock sample
- tensile test
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Abstract
The utility model provides an automatic tensile test device of rectifying of rock, symmetrical structure about wholly being, the go up tensile unit the same by the structure constitutes with down tensile unit, and the rock specimen is fixed in between tensile unit and the down tensile unit, it constitutes by clamping part, automatic deviation rectification device and the rock specimen fixed part of being connected in proper order along the rock specimen axial with down tensile unit to go up tensile unit, automatic deviation rectification device includes the last connecting portion installed in proper order along the rock specimen axial, cube nuclear and connecting portion down, goes up relative with the connecting portion down support ear that all is equipped with two symmetric distributions on the surface of connecting portion, and four to support the ear articulated with four sides of cube nuclear through the round pin axle, lies in two support ears on the same connecting portion and hinges two opposite flanks of examining in the cube, the device can make stretching device be in the vertical centering all the time through power decomposition principle behind the atress and draw stress state, solve eccentric tensile stress problem well.
Description
Technical field
This utility model relates to a kind of rock tensile test device, belongs to measurement and the technical field of measurement and test of solid material.
Background technology
The maximum tension stress that rock mass can bear when simple tension, is called uniaxial tension test, is called for short tensile strength. Although in application to engineering practice, usual tension seldom occurs, but the destruction that tension causes remains one of main damage form of engineering material field and nature rock mass, and Tensile Strength of Rock is relatively low, compressive strength is about the tensile strength of 10～30 times. Therefore, tensile strength is an important index in rock mass mechanics, and tensile strength is all one of very important parameter in the foundation of rock mass strength criterion, the determination of strength envelope and selection building stone. The tensile strength research carrying out rock mass is significant.
At present, the mensuration of Tensile Strength of Rock is mainly adopted by technological layer Indirect Determination and direct measuring method two kinds. Wherein, Indirect Determination includes split the law, point loading method etc., these methods reflect its tensile strength indirectly mainly by the comprcssive strength of rock, but what the tensile strength of rock was played a decisive role is the factor of rock nature aspect, such as mineralogical composition, intergranular connect, hole and crack etc., and resistance to compression load has essential distinction with tensile load force way, therefore there is many drawbacks in Indirect Determination, can produce bigger error.
The set hat type device with spheric seat that domestic the Changjiang river research institute takes the lead in using always as the rocks in direct tension device recommended in correlation test specification, but, in test it is seen that, it is inadequate that this device rotates flexibility ratio, and being difficult to avoid bias to draw should. A kind of method that patent of invention " a kind of system and method carrying out rocks in direct tension intensity and deformation measurement " (patent No.: Zl201310697933.6) discloses rocks in direct tension intensity and deformation measurement, rock sample need to be carried out joint-cutting by the method, and rock sample belongs to hard brittle material, and that it is carried out Precision Machining is comparatively difficult.
Therefore, how accurately to measure rocks in direct tension intensity quickly and be always up the study hotspot problem in rock mechanics and engineering geology field thereof, obtain the common concern of scholar and engineering staff.
Summary of the invention
The purpose of this utility model is in that to overcome the deficiencies in the prior art, and a kind of rock automatic deviation correction tensile test apparatus is provided, this rock tensile test device can make stretching device be in vertical centering tensile stress state all the time by power decomposition principle after stress, solves eccentric tension problem well.
Realizing the technical scheme that this utility model purpose adopts is, a kind of rock automatic deviation correction tensile test apparatus, the upper draw unit identical by structure and lower draw unit are constituted, and overall in upper and lower symmetrical structure, rock sample is fixed between draw unit and lower draw unit; Described upper draw unit is constituted by the clamping part being connected along rock sample axial order, automatic deviation rectifying device and rock sample fixed part with lower draw unit; Described automatic deviation rectifying device includes upper connecting portion, cube core and the lower connecting portion installed along rock sample axial order, the surface that upper connecting portion is relative with lower connecting portion is equipped with two symmetrical support ears, four support ears are hinged at four of cube core by bearing pin, are positioned on same a junction two support ears and are articulated with on the two relative side of cube core.
Described clamping part is column, and it offers more than 2 annular grooves being parallel to each other.
Described upper connecting portion is multidiameter, its diameter of axle sudden change place arc transition, two support ears are axially fixed on the end face of the big shaft part of upper connecting portion along upper connecting portion, and the little shaft part of upper connecting portion offers more than 2 annular grooves being parallel to each other, and the little shaft part of upper connecting portion constitutes clamping part.
The channel section of described annular groove is arc-shaped.
The end of described rock sample fixed part is provided with coheres groove, and cohere groove groove depth is rock sample height 0.03～0.05 times, rock sample is fixed on and coheres in groove.
The bottom of described lower connecting portion offers downward opening groove, and the bottom of lower connecting portion constitutes rock sample fixed part.
Described cube core is the square of seamed edge arc transition.
As shown from the above technical solution, the rock tensile test device that this utility model provides arranges automatic deviation rectifying device, automatic deviation rectifying device is by upper connecting portion, cube core and lower connecting portion are constituted, the surface that upper connecting portion is relative with lower connecting portion is respectively provided with two symmetrical support ears, upper connecting portion and lower connecting portion are hinged by support ear and cube core, four support ears are articulated with on the two relative side of cube core respectively through four two support ears being hinged at and being positioned on same a junction of bearing pin Yu cube core, this deviation correcting device connects for fixing in Z-direction, without relative displacement after tension, upper connecting portion is hinged along two apparent surfaces of X-axis (or Y-axis) by two symmetric support ears and cube core, therefore go up connecting portion to relatively rotate along X-axis (or Y-axis) with cube core, lower connecting portion is hinged along two apparent surfaces of Y-axis (or X-axis) by two symmetric support ears and cube core, therefore connecting portion and cube core is descended can to relatively rotate along Y-axis (or X-axis), upper connecting portion, cube core and lower connecting portion form the error-correction structure with two rotational freedoms, owing to rock tensile test device is structure symmetrical above and below, upper draw unit is identical with two automatic deviation rectifying device structures in lower draw unit, when tension direction vector vertical X axis, upper connecting portion (or lower connecting portion) in upper and lower two automatic deviation rectifying devices rotates around the bearing pin arranged along X-direction,When tension direction vector vertical Y axle, the lower connecting portion (or upper connecting portion) of upper and lower two automatic deviation rectifying devices rotates around the bearing pin arranged along Y direction; When tension vector is along other directions, upper connecting portion in upper and lower two automatic deviation rectifying devices carries out the rotation of X-axis, Y direction with lower connecting portion simultaneously around bearing pin, adjust the axial attitude of clamping part-automatic deviation rectifying device-rock sample fixed part-rock sample, make this rock tensile test device can be in vertical centering state all the time when stress, thus overcoming the eccentric tension problem that tension test exists.
For guarantee test effect, clamping part is offered more than 2 annular grooves being parallel to each other, annular groove increases the friction between clamping part and fixture, ensure during stress between clamping part and the fixture of charger without the relative sliding of Z-direction, the channel section of annular groove is arc-shaped, avoid producing stress concentration phenomenon, it is prevented that clamping part ruptures in test; Rock sample fixed part coheres fixing mode with rock sample employing and is connected, the end opens of rock sample fixed part coheres groove for what hold rock sample end, cohere groove and increase the Bonding area of rock sample fixed part and rock sample, ensure to cohere effect, cohere groove groove depth is rock sample height 0.03～0.05 times, the bond strength increasing rock sample avoids rock sample to produce end effect simultaneously.
In the rock tensile test device that this utility model provides, upper connecting portion and clamping part become one, and lower connecting portion and rock sample fixed part become one, and number of parts is few, overall structure is more simplified; Cube core is the square of seamed edge arc transition, and cube core provides for two orthogonal bearing pins and effectively supports, and can increase the useful space rate of inside, and seamed edge arc transition can ensure that the flatness of adjustment process.
Compared with prior art, the beneficial effects of the utility model are:
(1) automatic deviation rectifying device can carry out omnibearing angular adjustment, and rock sample stress after-drawing ensures that tension vector is all the time along vertical centering, it is possible to evades eccentric tension problem well, makes the tensile strength of test gained according to there being significantly high fidelity.
(2) the rock automatic deviation correction tensile test apparatus internal structure that this utility model provides is simple, number of parts is few, also greatly simplify making and operation easier while guarantee test effect.
(3) when using this device to carry out rock tension test, its rock sample need not be processed into special form, and the rock tension test body of compliant may be used for test, largely decreases processing cost, saves test period.
Accompanying drawing explanation
The structural representation of the rock automatic deviation correction tensile test apparatus that Fig. 1 provides for this utility model.
Fig. 2 is the structural representation of automatic deviation rectifying device.
The use schematic diagram of the rock automatic deviation correction tensile test apparatus that Fig. 3 provides for this utility model.
Wherein, 1-universal testing machine, the upper draw unit of 2-, the upper clamping part of 21-, connecting portion on 22-first, support ear on 23-first, 24-the first X-direction bearing pin, the upper cube core of 25-, first time connecting portion of 26-, 27-the first Y direction bearing pin, 28-the first lower support ear, 29-coheres groove, draw unit under 3-, clamping part under 31-, connecting portion on 32-second, support ear on 33-second, 34-the second X-direction bearing pin, cube core under 35-, second time connecting portion of 36-, 37-the second Y direction bearing pin, 38-the second lower support ear, groove is cohered under 39-, 4-rock sample, 5-foil gauge, 6-fixture, 7-annular groove.
Detailed description of the invention
Below in conjunction with drawings and Examples, this utility model being illustrated in detail, content of the present utility model is not limited to following example.
The rock automatic deviation correction tensile test apparatus that this utility model provides, its structure is as shown in Figure 1, overall in upper and lower symmetrical structure, it is made up of symmetrical configuration and identical upper draw unit 2 and lower draw unit 3, rock sample 4 is fixed between draw unit 2 and lower draw unit 3, and upper draw unit 2 is constituted by clamping part, automatic deviation rectifying device and the rock sample fixed part that axially namely Z-direction is linked in sequence along rock sample with lower draw unit 3;
Upper draw unit 2 is made up of the upper clamping part 21 connected along rock sample axial order, upper automatic deviation rectifying device and upper rock sample fixed part, referring to Fig. 2, described upper automatic deviation rectifying device includes connecting portion 22 along the first of rock sample axial order installation, upper cube core 25 and first time connecting portion 26, upper cube core 25 is the square of seamed edge arc transition, the surface that on first, connecting portion 22 is relative with first time connecting portion 26 is equipped with two symmetrical support ears, it is specially in X-direction be fixed on first connecting portion 22 lower surface two first support ear 23 and is fixed on two the first lower support ears 28 of first time connecting portion 26 upper surface along Y direction, on two first, support ear 23 is hinged with the two relative side of upper cube core 25 by the first X-direction bearing pin 24, two the first lower support ears 28 are hinged with the other two relative side of upper cube core 25 by the first Y direction bearing pin 27, on described first, connecting portion 22 is multidiameter, its diameter of axle sudden change place arc transition, on the end face that on two first, support ear 23 connecting portion 22 along first is axially fixed on first the big shaft part of connecting portion 22, the little shaft part of connecting portion 22 offers on first more than 2 annular grooves being parallel to each other 7, the channel section of annular groove 7 is arc-shaped, and on first, the little shaft part of connecting portion 22 constitutes the upper clamping part 21 of rock tensile test device, the bottom of described first time connecting portion 26 offer downward opening on cohere groove 29, above cohere groove 29 groove depth is rock sample height 0.03～0.05 times, the bottom of first time connecting portion 26 constitutes the upper rock sample fixed part of rock tensile test device,
Lower draw unit 3 is by the lower rock sample fixed part connected along rock sample axial order, lower automatic deviation rectifying device and lower clamping part 31 are constituted, including lower clamping part 31, connecting portion 32 on second, support ear 33 on second, second X-direction bearing pin 34, lower cube core 35, second time connecting portion 36, second Y direction bearing pin 37 and the second lower support ear 38, the top of second time connecting portion 36 offer opening up under cohere groove 39, the top of second time connecting portion 36 constitutes the lower rock sample fixed part of rock Tensile Tester, owing to lower draw unit 3 is identical with upper draw unit 2 structure, in lower draw unit 3, the annexation between each composition structure repeats no more, the two ends of rock sample 4 be individually fixed in cohere groove 29 and under cohere in groove 39, during test, charger clamps clamping part 21 and lower clamping part 31 respectively.
The rock automatic deviation correction tensile test apparatus that this utility model provides is used for rock tension test, and this test is with universal testing machine for relying on, and universal testing machine provides the tensile stress that test is required, and Integrated test facility is as it is shown on figure 3, its concrete operation step is as follows:
(1) rock sample 4 is chosen, according to related specifications to the regulation of rock sample in rock tension test, rock sample diameter is Φ 48～54mm, and ratio of height to diameter is 2～2.5, this test chooses diameter to be 50mm, length is the rock of 100mm as rock sample, its two ends irregularity degree tolerance ± 0.05mm;
(2) two ends of rock sample 4 are fixed on by high-strength resin gluing knot cohere groove 29 and under cohere in groove 39, this adhesive can cohere rock effectively, and the maximum tensile strength in gluing face can meet the requirement of common rocks in direct tension test;
(3) foil gauge 5 is pasted on rock sample 4 surface by regulation, measure, measuring rock stress tensile strength, the strain conditions that rock sample 4 is small simultaneously, and carry out the preparation gathering data in test;
(4) after clamping respectively to the ready test specimen upper clamping part 21 by fixture 6 clamping device on universal testing machine 1 and lower clamping part 31, upper clamping part 21 and lower clamping part 31, test will be started, as shown in Figure 3;
(5) in process of the test, slowly uniform applying draws load, it is typically about 0.1～0.3MPa/s, after load is drawn in applying, automatic deviation rectifying device top branch does front and back around rotating shaft and adjusts, lower part is then done left and right around rotating shaft and is adjusted, ensure that rock automatic deviation correction tensile test apparatus is in vertical centering state all the time, force vector acts on rock sample along axis direction, overcome an eccentric tension difficult problem, by the rock sample degree of strain that computer real-time acquisition tension and foil gauge are fed back, until rock sample 4 is pulled off, off-test.
Claims (7)
1. a rock automatic deviation correction tensile test apparatus, it is characterised in that: the upper draw unit identical by structure and lower draw unit are constituted, and overall in upper and lower symmetrical structure, rock sample is fixed between draw unit and lower draw unit; Described upper draw unit is constituted by the clamping part being connected along rock sample axial order, automatic deviation rectifying device and rock sample fixed part with lower draw unit; Described automatic deviation rectifying device includes upper connecting portion, cube core and the lower connecting portion installed along rock sample axial order, the surface that upper connecting portion is relative with lower connecting portion is equipped with two symmetrical support ears, four support ears are hinged at four of cube core by bearing pin, are positioned on same a junction two support ears and are articulated with on the two relative side of cube core.
2. rock automatic deviation correction tensile test apparatus according to claim 1, it is characterised in that: described clamping part is column, and it offers more than 2 annular grooves being parallel to each other.
3. rock automatic deviation correction tensile test apparatus according to claim 2, it is characterized in that: described upper connecting portion is multidiameter, its diameter of axle sudden change place arc transition, two support ears are axially fixed on the end face of the big shaft part of upper connecting portion along upper connecting portion, offering more than 2 annular grooves being parallel to each other on the little shaft part of upper connecting portion, the little shaft part of upper connecting portion constitutes clamping part.
4. rock automatic deviation correction tensile test apparatus according to Claims 2 or 3, it is characterised in that: the channel section of described annular groove is arc-shaped.
5. rock automatic deviation correction tensile test apparatus according to claim 1, it is characterised in that: the end of described rock sample fixed part is provided with coheres groove, and cohere groove groove depth is rock sample height 0.03～0.05 times, rock sample is fixed on and coheres in groove.
6. rock automatic deviation correction tensile test apparatus according to claim 5, it is characterised in that: the bottom of described lower connecting portion offers downward opening groove, and the bottom of lower connecting portion constitutes rock sample fixed part.
7. rock automatic deviation correction tensile test apparatus according to claim 1, it is characterised in that: described cube core is the square of seamed edge arc transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620065242.3U CN205317585U (en) | 2016-01-22 | 2016-01-22 | Automatic tensile test device of rectifying of rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620065242.3U CN205317585U (en) | 2016-01-22 | 2016-01-22 | Automatic tensile test device of rectifying of rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205317585U true CN205317585U (en) | 2016-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620065242.3U Expired - Fee Related CN205317585U (en) | 2016-01-22 | 2016-01-22 | Automatic tensile test device of rectifying of rock |
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| Country | Link |
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| CN (1) | CN205317585U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267363A (en) * | 2016-12-30 | 2018-07-10 | 中国科学院宁波材料技术与工程研究所 | A kind of composite material interlayer faults toughness test fixture and its application |
| CN110579396A (en) * | 2019-08-27 | 2019-12-17 | 浙江水利水电学院 | Axial tension holding device for concrete strength test and mounting method thereof |
| CN113188906A (en) * | 2021-04-25 | 2021-07-30 | 重庆科技学院 | Rock uniaxial tension test device and method |
| CN114323964A (en) * | 2022-01-18 | 2022-04-12 | 东北石油大学 | Pressure-tension conversion type self-balancing rock composite fracture toughness and fracture energy testing device |
-
2016
- 2016-01-22 CN CN201620065242.3U patent/CN205317585U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267363A (en) * | 2016-12-30 | 2018-07-10 | 中国科学院宁波材料技术与工程研究所 | A kind of composite material interlayer faults toughness test fixture and its application |
| CN110579396A (en) * | 2019-08-27 | 2019-12-17 | 浙江水利水电学院 | Axial tension holding device for concrete strength test and mounting method thereof |
| CN110579396B (en) * | 2019-08-27 | 2024-02-13 | 浙江水利水电学院 | Axial tension load-bearing device for concrete strength test and mounting method thereof |
| CN113188906A (en) * | 2021-04-25 | 2021-07-30 | 重庆科技学院 | Rock uniaxial tension test device and method |
| CN113188906B (en) * | 2021-04-25 | 2022-05-20 | 重庆科技学院 | Rock uniaxial tension test device and method |
| CN114323964A (en) * | 2022-01-18 | 2022-04-12 | 东北石油大学 | Pressure-tension conversion type self-balancing rock composite fracture toughness and fracture energy testing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160615 Termination date: 20180122 |