CN108562491A - Automatic centering type rocks in direct tension experimental rig - Google Patents
Automatic centering type rocks in direct tension experimental rig Download PDFInfo
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- CN108562491A CN108562491A CN201810374288.7A CN201810374288A CN108562491A CN 108562491 A CN108562491 A CN 108562491A CN 201810374288 A CN201810374288 A CN 201810374288A CN 108562491 A CN108562491 A CN 108562491A
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- 239000011435 rock Substances 0.000 title claims abstract description 38
- 238000012360 testing method Methods 0.000 claims abstract description 19
- 238000009864 tensile test Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- Life Sciences & Earth Sciences (AREA)
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention discloses a kind of automatic centering type rocks in direct tension experimental rig, including sample cap bag, ball-head tension rod, ball and sleeve, a connection piece is connected on the sample cap bag, hinged one flexible tension pull rope of the end of the connector, the end of the flexibility tension rope is hinged in the tie rod end of ball-head tension rod, it is equipped with several balls in the embedded groove and along the end surface of ball-head tension rod, a caulking groove lid is removably equipped on the sleeve and positioned at the top of embedded groove.This tensile test apparatus turns between part and sample cap bag in bulb using flexible tension flexibility tension rope connection, and ball and sleeve, bulb turn to pass through point contact between part, experimental rig is set to carry out comprehensive angular adjustment, flexible rotating and can automatic deflection adjusting, tensile stress is always along axis after ensureing rock sample stress, evade eccentric tensile stress problem, and the structure of the present apparatus is simple, easy to operate, handling are easy, the accurate tensile strength for testing rock sample.
Description
Technical field
The present invention relates to a kind of rocks in direct tension experimental rigs, and in particular to a kind of automatic centering type rocks in direct tension
Experimental rig.
Background technology
Rock, concrete are materials common in infrastructure construction.This two classes material all has good compressive property,
But brittleness is strong, and tensile strength is low, thus, the tensile strength of such material is accurately measured to rationally determining design parameter, to keeping away
The brittleness catastrophic failure for exempting from engineering structure has extremely important effect.The test method master of Tensile Strength of Rock is measured at present
There are two classes：Indirect method and direct method.Indirect method, using test specimen of different shapes, is led under conditions of certain simplified hypothesis
Cross the analysis to test specimen inside stressing conditions, indirectly obtain measured material tensile strength, as Brazilian disc split the law, 3 points
Bent beam method etc..Such method is although easy to operate, but since the idealization hypothesis that stress is complicated, is related to is more, thus
More sensitive to Specimen Shape, boundary condition, loading form etc., the usual discreteness of test result is larger, the tensile strength ginseng measured
Number differs greatly with direct method.Currently, rock tensile test device is that load is passed to steel ball by sleeve, then pass through steel ball
It passes to bulb and turns part.Bulb turns the sample cap bag that part makes with metal and is bolted, between sample cap bag and rock sample
Then high-strength adhesive is used to bond.But ensure to avoid eccentric tension rock always.
Notification number is the Chinese invention patent of CN201508298U, discloses a kind of rock transmitting load using spherical surface roller
Tensile test apparatus, including sleeve and top are placed in sleeve, pull rod of the bottom end with sample cap bag, are passed through on pull rod top
Upper and lower pressing plate and spherical surface roller therebetween are placed in sleeve.Stringent centering is not needed between the upper and lower pressing plate of the experimental rig,
Therefore, the rock stretching device of load is transmitted using spherical surface roller, but realizes stretch without acceptance of persons to a certain extent, but there are still
Problems with：Spherical surface roller is placed in the spherical groove of lower platen, is contacted using face and is transmitted load, bulb is caused to turn part and spherical surface
It is rotated between roller dumb；In addition, pull rod is rigid, at it can only stretch on axial direction, it cannot be guaranteed that rock
Tensile stress direction axially along always after sample stress, and then the problem of eccentric tensile stress cannot be evaded, so as to cause experiment
Effect is inaccurate.
Invention content
In view of the deficienciess of the prior art, the present invention provides a kind of automatic centering type rocks in direct tension experimental rig,
This tensile test apparatus turns to connect using flexible tension rope between part and sample cap bag in bulb, and ball and sleeve, bulb
Turn between part to make by point contact experimental rig to carry out comprehensive angular adjustment, flexible rotating and can automatic deflection adjusting, ensure
Tensile stress evades eccentric tensile stress problem always along axis after rock sample stress, and the structure of the present apparatus is simple, operation letter
Just, handling are easy, the accurate tensile strength for testing rock sample.
In order to achieve the above object, the technical solution that the present invention takes：
Automatic centering type rocks in direct tension experimental rig, including symmetrically arranged upper stretching test unit and lower stretching examination
Verification certificate member, the upper stretching test unit, lower stretching test unit include sample cap bag, ball-head tension rod, ball and sleeve, institute
It states and connects a connection piece on sample cap bag, the hinged one flexible tension rope of end of the connector, the flexibility tension rope
End be hinged in the tie rod end of ball-head tension rod, the bulb of the ball-head tension rod turns part and is nested in sleeve, the sleeve
The embedded groove to match with the bulb end of ball-head tension rod is inside opened up, the embedded groove is interior and along the bulb end of ball-head tension rod
Portion's surface perimeter is equipped with several balls, and the top on the sleeve and positioned at embedded groove is equipped with a removably caulking groove lid.
As optimal technical scheme, in order to ensure stable connection between sample cap bag and rock sample, while ensureing sample
The intensity of cap bag, it is ensured that entire experimental rig normal work, the end of the sample cap bag is opened up to match with rock sample
The depth of link slot, the link slot is 10mm.
Have for the ease of caulking groove lid is assemblied on sleeve or is disassembled in from sleeve as optimal technical scheme
Effect shortens the lay day of entire experimental rig, ensures ease-to-operate, the caulking groove, which covers, offers spanner screw hole.
Compared with prior art, the device have the advantages that：
1, this tensile test apparatus turns to connect using flexible tension flexibility tension rope between part and sample cap bag in bulb,
Realize flexible connection, and ball and sleeve, bulb turn to make experimental rig carry out comprehensive angle by point contact between part
Adjust, flexible rotating and can automatic deflection adjusting, ensure rock sample stress after tensile stress always along axis, evade eccentric tensile stress
Problem, and the structure of the present apparatus is simple, easy to operate, handling are easy, the accurate tensile strength for testing rock sample.
2, sample cap bag is equipped with the link slot of 10mm, ensures stable connection between sample cap bag and rock sample, protects simultaneously
Demonstrate,prove the intensity of sample cap bag, it is ensured that entire experimental rig normal work.
3, caulking groove, which covers, offers spanner screw hole, convenient for caulking groove lid is assemblied on sleeve or is under being dismantled from sleeve
Come, effectively shorten lay day of entire experimental rig, ensures ease-to-operate.
Description of the drawings
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the assembling schematic diagram of ball head connecting rod and flexible tension rope；
Drawing reference numeral：1, rock sample, 2, sample cap bag, 2-1, link slot, 3, connector, 4, flexible tension rope, 5,
Ball-head tension rod, 5-1, bulb turn part, 5-2, connecting rod, and 6, sleeve, 6-1, embedded groove, 6-2, caulking groove lid, 6-3, spanner screw hole,
7, ball, 8, connecting rod.
Specific implementation mode
It is proposed a kind of specific embodiment of the present invention as shown in Figure 1, automatic centering type rocks in direct tension experimental rig is and existing
Tensile test apparatus is identical to be：Including symmetrically arranged upper stretching test unit and lower stretching test unit, the pull-up
It includes that cooperation is set to sample cap bag 2, ball-head tension rod 5, ball 7, sleeve 6, the examination to stretch test unit, lower stretching test unit
For the cooperation of sample cap bag set on the end of cylindric rock sample 1, the ball-head tension rod 5 includes that the bulb being nested in sleeve 6 turns part
5-1 and turn the connecting rod 5-2 below part 5-1 set on bulb；Except that：A connection piece is connected on the sample cap bag 2
3, using being threadedly coupled between the present embodiment setting connector 3 and sample cap bag 2, i.e., the end of connector 3 is equipped with external screw thread, examination
Matched internal thread, the hinged one flexible tension rope 4 of end of the connector 3, this implementation are offered on sample cap bag 2
Example offers a slot in the end of connector 3, and the end of flexible tension rope 4 is connect by shaft with slot, realizes connection
Part 3 is hinged with flexible tension rope 4, and it is the carbon made of carbon fibre material that the flexible tension rope 4, which is arranged, in the present embodiment
Fiber is high intensity, the new fiber materials of high modulus fibre of a kind of phosphorus content 95% or more.It is micro- by flake graphite
The organic fibers such as crystalline substance are piled up along fiber axial direction, through microcrystalline graphite material obtained from carbonization and graphitization processing.Carbon
Fiber " soft outside but hard inside ", quality is lighter than metallic aluminium, but intensity is higher than steel, and has corrosion-resistant, high-modulus characteristic, institute
The end for stating flexible tension rope 4 is articulated on the ends connecting rod 5-1 of a ball-head tension rod 5, the sample cap bag 2, connection
Part 3, flexible tension rope 4, ball-head tension rod 5 are co-axially mounted, then can be rotated coaxially, the present embodiment is arranged in connecting rod
The end of 5-2 offers a groove, and the end of flexible tension rope 4 is fixed by a connecting rod 8 again after being placed in groove,
It is nested in a sleeve 6 as shown in Fig. 2, the bulb turns part 5-1, is opened up in the sleeve 6 and turn what part 5-1 matched with bulb
The circumferential surface for turning part 5-1 in embedded groove 6-1, the embedded groove 6-1 and along bulb is equipped with several balls 7, all balls
7 can turn part 5-1 with bulb relatively rotates, and the top on the sleeve 6 and positioned at embedded groove 6-1 is equipped with a removably caulking groove
6-2 is covered, the present embodiment setting caulking groove lid 6-2 is connected through a screw thread realization detachability with sleeve 6.
The end of the sample cap bag 2 opens up the link slot 2-1 to match with rock sample 1, the depth of the link slot 2-1
Degree be 10mm, if link slot 2-1 depth setting it is too shallow, be unfavorable for it is bonding between rock sample 1 and sample cap bag 2, if even
The depth setting of access slot 2-1 is too deep, weakens the intensity of sample cap bag, the connection that setting depth 10mm matches with rock sample 1
Slot 2-1 ensures stable connection between sample cap bag 2 and rock sample 1, while ensureing the intensity of sample cap bag 2, it is ensured that entire examination
Experiment device works normally.
Spanner screw hole 6-3 is offered on the caulking groove lid 6-2, convenient for caulking groove lid 6-2 being assemblied on sleeve 6 or from sleeve
It is disassembled on 6, effectively shortens lay day of entire experimental rig, ensure ease-to-operate.
When the present invention uses：The both ends of rock sample 1 are bonded in the connection of two sample cap bags 2 with high strength epoxy resin
In slot 2-1, and keep after two sample cap bags, 2 Shaft alignment state shelves 24 hours, assembling tensile test apparatus as shown in Figure 1, it will
Two sleeves 6 are connect with the clamping unit of universal testing machine, you can are tested.Due to the flexible tension rope made of carbon fiber
4 have ability are adjusted flexibly, in addition bulb turns part and all balls by connecting, are adjusted flexibly, guarantee 1 stress of rock sample
Tensile stress evades eccentric tensile stress problem always along axis afterwards, the accurate tensile strength for testing rock sample.
Certainly, only the preferred embodiments of the disclosure is described in detail in conjunction with attached drawing above, not with this
Limit the practical range of the present invention, equivalence changes made by all principles under this invention, construction and structure should all be covered by this
In the protection domain of invention.
Claims (3)
1. automatic centering type rocks in direct tension experimental rig, including symmetrically arranged upper stretching test unit and lower tension test
Unit, the upper stretching test unit, lower stretching test unit include sample cap bag (2), ball-head tension rod (5), ball (7) and
Sleeve (6), it is characterised in that：A connection piece (3) is connected on the sample cap bag (2), the end hinged one of the connector is soft
Property tension pull rope (4), it is described flexibility tension rope (4) end be hinged in the tie rod end of ball-head tension rod (5), the ball
The ball-shaped end of head connecting rod (5) is nested in sleeve (6), and the ball-shaped end phase with ball-head tension rod (5) is opened up in the sleeve (6)
Matched embedded groove (6-1), the embedded groove (6-1) is interior and is equipped with along the bulb end circumferential surface of ball-head tension rod several
Ball (7) is equipped with a removably caulking groove lid (6-2) on the sleeve (6) and positioned at the top of embedded groove (6-1).
2. automatic centering type rocks in direct tension experimental rig according to claim 1, it is characterised in that：The sample set
The end of cap (2) opens up the link slot (2-1) to match with rock sample (1), and the depth of the link slot (2-1) is 10mm.
3. automatic centering type rocks in direct tension experimental rig according to claim 1 or 2, it is characterised in that：It is described embedding
Spanner screw hole (6-3) is offered in capping (6-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810374288.7A CN108562491A (en) | 2018-04-24 | 2018-04-24 | Automatic centering type rocks in direct tension experimental rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810374288.7A CN108562491A (en) | 2018-04-24 | 2018-04-24 | Automatic centering type rocks in direct tension experimental rig |
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| Publication Number | Publication Date |
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| CN108562491A true CN108562491A (en) | 2018-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810374288.7A Pending CN108562491A (en) | 2018-04-24 | 2018-04-24 | Automatic centering type rocks in direct tension experimental rig |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406270A (en) * | 2018-10-08 | 2019-03-01 | 上海海洋大学 | The device and its test method of the non-homogeneous multi-direction tensile strength test of eva foam |
| CN109752234A (en) * | 2019-02-27 | 2019-05-14 | 河北工业大学 | A kind of rock type materials biaxial tension test experimental rig of the real-time centering of draw direction |
| CN110487622A (en) * | 2019-09-17 | 2019-11-22 | 东北大学 | A kind of force transmission mechanism suitable for the test of rock Three-direction stretching |
| CN111707609A (en) * | 2020-06-03 | 2020-09-25 | 南京科工煤炭科学技术研究有限公司 | Testing device and testing method for tangential bonding strength of thin spray lining layer |
| CN111855393A (en) * | 2020-07-30 | 2020-10-30 | 上海无线电设备研究所 | Brittle material tensile strength test clamping device |
| CN113188906A (en) * | 2021-04-25 | 2021-07-30 | 重庆科技学院 | Rock uniaxial tension test device and method |
| CN113984513A (en) * | 2021-10-27 | 2022-01-28 | 北京航空航天大学 | Near-far double-end aligning device |
| CN114002056A (en) * | 2021-11-10 | 2022-02-01 | 广东粤海珠三角供水有限公司 | Material test connecting device capable of being coaxially adjusted |
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| US4300397A (en) * | 1980-04-30 | 1981-11-17 | Brest Van Kempen Carel J H | Device and method for determining material strength in situ |
| CN201508298U (en) * | 2009-09-23 | 2010-06-16 | 昆明理工大学 | Rock tensile test device by utilizing spherical stone roller to transmit load |
| CN102288479A (en) * | 2011-05-13 | 2011-12-21 | 重庆大学 | Fragile material force test connecting device |
| CN203191259U (en) * | 2013-04-13 | 2013-09-11 | 山东交通学院 | Concrete axial tension test device |
| CN103674707A (en) * | 2013-12-18 | 2014-03-26 | 北京科技大学 | System and method for measuring direct tensile strength and deformation of rock |
| CN205786097U (en) * | 2016-05-10 | 2016-12-07 | 王哲 | A kind of rocks in direct tension experimental provision utilizing many balls quantum balancing eccentric throw |
| CN206876483U (en) * | 2017-07-06 | 2018-01-12 | 防灾科技学院 | A kind of Tensile Strength of Rock test device |
| CN208187850U (en) * | 2018-04-24 | 2018-12-04 | 钦州学院 | Automatic centering type rocks in direct tension experimental rig |
-
2018
- 2018-04-24 CN CN201810374288.7A patent/CN108562491A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4300397A (en) * | 1980-04-30 | 1981-11-17 | Brest Van Kempen Carel J H | Device and method for determining material strength in situ |
| CN201508298U (en) * | 2009-09-23 | 2010-06-16 | 昆明理工大学 | Rock tensile test device by utilizing spherical stone roller to transmit load |
| CN102288479A (en) * | 2011-05-13 | 2011-12-21 | 重庆大学 | Fragile material force test connecting device |
| CN203191259U (en) * | 2013-04-13 | 2013-09-11 | 山东交通学院 | Concrete axial tension test device |
| CN103674707A (en) * | 2013-12-18 | 2014-03-26 | 北京科技大学 | System and method for measuring direct tensile strength and deformation of rock |
| CN205786097U (en) * | 2016-05-10 | 2016-12-07 | 王哲 | A kind of rocks in direct tension experimental provision utilizing many balls quantum balancing eccentric throw |
| CN206876483U (en) * | 2017-07-06 | 2018-01-12 | 防灾科技学院 | A kind of Tensile Strength of Rock test device |
| CN208187850U (en) * | 2018-04-24 | 2018-12-04 | 钦州学院 | Automatic centering type rocks in direct tension experimental rig |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406270A (en) * | 2018-10-08 | 2019-03-01 | 上海海洋大学 | The device and its test method of the non-homogeneous multi-direction tensile strength test of eva foam |
| CN109752234A (en) * | 2019-02-27 | 2019-05-14 | 河北工业大学 | A kind of rock type materials biaxial tension test experimental rig of the real-time centering of draw direction |
| CN110487622A (en) * | 2019-09-17 | 2019-11-22 | 东北大学 | A kind of force transmission mechanism suitable for the test of rock Three-direction stretching |
| CN111707609A (en) * | 2020-06-03 | 2020-09-25 | 南京科工煤炭科学技术研究有限公司 | Testing device and testing method for tangential bonding strength of thin spray lining layer |
| CN111707609B (en) * | 2020-06-03 | 2022-11-11 | 南京科工煤炭科学技术研究有限公司 | Testing device and testing method for tangential bonding strength of thin spray lining layer |
| CN111855393A (en) * | 2020-07-30 | 2020-10-30 | 上海无线电设备研究所 | Brittle material tensile strength test clamping device |
| 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 |
| CN113984513A (en) * | 2021-10-27 | 2022-01-28 | 北京航空航天大学 | Near-far double-end aligning device |
| CN113984513B (en) * | 2021-10-27 | 2022-08-05 | 北京航空航天大学 | Near-far double-end aligning device |
| CN114002056A (en) * | 2021-11-10 | 2022-02-01 | 广东粤海珠三角供水有限公司 | Material test connecting device capable of being coaxially adjusted |
| CN114002056B (en) * | 2021-11-10 | 2024-04-09 | 广东粤海珠三角供水有限公司 | Coaxially adjustable material test connection device |
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