CN109443913A - A kind of fixed device of rock test block for Point Load Tests - Google Patents
A kind of fixed device of rock test block for Point Load Tests Download PDFInfo
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- CN109443913A CN109443913A CN201811592734.8A CN201811592734A CN109443913A CN 109443913 A CN109443913 A CN 109443913A CN 201811592734 A CN201811592734 A CN 201811592734A CN 109443913 A CN109443913 A CN 109443913A
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- 230000008569 process Effects 0.000 description 5
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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
- G01N3/02—Details
- G01N3/04—Chucks
-
- 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
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0252—Monoaxial, i.e. the forces being applied along a single axis of the specimen
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- 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 provides a kind of fixed devices of rock test block for Point Load Tests, including the Carrier box for placing rock test block, Carrier box includes upper plate, lower plate and side plate, lower plate is connect by flexible connector with carrying box main body, the elastic force of flexible connector is greater than the sum of rock test block and the gravity of lower plate, so that after rock test block is put into Carrier box, rock test block can the elastic force of flexible connector effect under with lower plate be moved upward to it is final offset with upper conical pressure head, so that rock test block be made to be fixed.The invention enables during Point Load Tests, it is no longer necessary to manually go grasping rock test block with hand, eliminate security risk, improve the convenience of operation, save manpower.While playing splashproof, enhancing test safety to rock test block by the upper plate of Carrier box and side plate, also prevented the small blocks formed after rock test block is split occur avalanche and long range it is mobile a possibility that, facilitate the splicing in small blocks later period to restore.
Description
Technical field
The present invention relates to Point Load Tests equipment, the fixed device of especially a kind of rock test block for Point Load Tests.
Background technique
The uniaxial compressive strength of rock in order to obtain generally requires rock being processed into key rock sample, adopts indoors
Compression test is carried out to rock sample with press machine.The process of processing criterion rock sample can inevitably cause virgin rock secondary
It destroys, such as: the internal minute structure of rock itself is destroyed, to affect the accuracy of test result to a certain extent.And
Point Load Tests are not needed to process virgin rock and can be tested rock test block, have certain advantage.
Point Load Tests are widely applied to each engineering field, such as: mine engineering, civil engineering and Geological Engineering
Deng.Point Load Tests compare more indoor rock mechanics experiment, have the characteristics that portability, rapidity, inexpensive cost.Point Load Tests
In the process, using Point Load Strength Instrument complete rock test block strength detection, mainly have pedestal, hand hydraulic pump, conical indenter,
And the components such as fixed link composition.In working site, the rock test block to be measured is chosen, is placed on up and down the two of Point Load Strength Instrument
Between a pressurization conical head, hand hydraulic jack compression bar stops pressurization and (stops operation pressure until after rock test block destruction
Bar).
Existing Point Load Strength Instrument has the following deficiencies:
1, rock test block manually holds positioning before the test, grasps rock sample with hand and send to close to upper conical pressure head
The position of bottom when lower taper pressure head being needed to be pressed onto rock test block, makes since upper conical pressure head is not able to maintain the stabilization of test block
It can loose one's grip after test block is motionless, on the one hand, conehead is easy to be pressed onto hand, and there are larger security risks；On the other hand, in lower cone
Shape pressure head is pressed onto before rock test block, and a hand, which fixes rock test block, to be unclamped, and another hand needs to operate hydraulic thousand
Jin compression bar rises lower cone forming head, has big inconvenience victory.
2, after fixing rock test block, continue hand hydraulic jack after test block is damaged by pressure, stop pressurization.This mistake
Journey, rock test block are easy to produce and burst apart, the rock test block after pressurization has energy, rock test block clast due to being under pressure
It can splash around, on the one hand be easy to hurt test operator；On the other hand, the rock test block burst apart splashes to surrounding
Afterwards, the block position after each division changes, it is more difficult to original in the whole test block of block before the test after finding division
Position, especially for the biggish rock of brittleness itself, the small blocks quantity generated after bursting apart is more, is difficult to broken after test
Small blocks carry out splicing recovery, so cannot be for form, the crackle destruction of the rock test block after bursting apart situations such as with before test
Whole test block compare and analyze, influence the development of research work.
Patent CN201320808075.3 discloses a kind of Point Load Tests device that band radially clamps, it includes for adding
It the hydraulic pressure testing machine of lotus and is bored with the matching used specimen holder device of pressure testing machine and upper and lower loading；Test specimen
Clamping device structure is: the pad post that height can be adjusted is equipped on the central axis of the hydraulic cylinder column cap of hydraulic pressure testing machine,
Pad post is equipped with backing plate；Backing plate both ends are symmetrically arranged with the left and right longitudinal rod of energy up and down adjustment；It is symmetrical on left and right longitudinal rod
Position is respectively equipped with the transverse bar of the horizontal push-and-pull of energy, and the inner termination of two transverse bars is respectively equipped with the resilient clamp pad of arc,
Ask the arc of two gripper pads corresponding.The patent mainly devises a kind of radial clamping device, reaches to a certain extent
The purpose of safety test, but there are still following shortcomings by patent CN201320808075.3:
1, structure is complicated, cumbersome.Before at least being needed using clamping device disclosed in patent CN201320808075.3
4 connecting rods in left and right can be only achieved the purpose of fixed rock test block afterwards, and structure is complex；And in order to clamp a rock test block
4 backing plate connecting rods may be needed to adjust, and left and right will be adjusted, if adjusting position is improper, can also be made to test result
At influence.General Point Load Tests can carry out hundreds and thousands of secondary rock test blocks tests, every time test will adjustment pad connecting rod,
This just virtually increases test period.
2, safety is not high.Patent CN201320808075.3 is only provided with clamping dress in rock test block the right and left
It sets, clamping device is not set in rock test block front and rear sides, but rock test block is destroyed during being pressurizeed by conical head
It splashes around afterwards, avalanche direction has very big uncertainty, so the device can not be prevented completely after rock test block is destroyed
Only broken block of stone is hurted sb.'s feelings from the avalanche of front and rear sides direction, particularly with the biggish rock test block of brittleness.
3, test result is influenced.Gripper pad in clamping device disclosed in patent CN201320808075.3 is from left and right directions
Upper clamping rock test block, but gripper pad is difficult to accurate evaluation and control to the clamping force of rock test block, clamps during the test
Pad is virtually just applied with a confining pressure to rock test block to the clamping force of rock test block, the mechanics ginseng that the experimental provision is surveyed at this time
Number not instead of uniaxial compressive strength, the intensity under the effect of certain confining pressure.
Therefore, still need a kind of scheme, in the prior art to solve above-mentioned technical problem.
Summary of the invention
It is an object of that present invention to provide a kind of fixed devices of rock test block for Point Load Tests, to solve background technique
The problem of middle proposition.
A kind of fixed device of rock test block for Point Load Tests, including for placing rock test block 4 Carrier box 1 and
It is used to support the connecting component 3 of connection Carrier box, described connecting component one end is connect with the Carrier box, the other end and point loading
The support frame of tester connects, and the Carrier box includes upper plate 11, lower plate 12 and side plate 13, and the upper plate and side plate, which are constituted, to be carried
Box main body, upper plate are located at close to the position of upper conical 28 bottom of pressure head, and carrying box main body connects as fixed part and connecting component 3
It connects, lower plate is connect by flexible connector 14 with carrying box main body as movable part, in the upper conical pressure of correspondence on the upper plate
The position of head, which is provided with, extends downwardly into through-hole 1 inside Carrier box for upper conical pressure head 28, in the lower plate under correspondence
The position of conical indenter, which is provided with, extends upwardly into through-hole 2 16 inside Carrier box, the elastic connection for inferior pyramidal pressure head 27
The elastic force direction of part is arranged along the vertical direction, and the elastic force of the flexible connector is greater than the sum of rock test block and the gravity of lower plate,
So that rock test block can be in bullet at the position for the through-hole two rock test block being placed in lower plate and after the upper conical pressure head of alignment
Property connector elastic force effect under with lower plate be moved upward to it is final offset with upper conical pressure head, so that rock test block be made to be consolidated
It is fixed.The elastic force of flexible connector do not need it is excessive, only need rock test block can just be held up upwards, can both fix rock examination
Block, and will not influence test result.
When doing Point Load Tests, the position of the upper plate is set above upper conical pressure head bottom, and the height being higher by is big
In or equal to rock test block and upper conical pressure head contact position cup depth, that is, upper conical pressure head bottom via through holes one are protruded into and are held
It carries in box, so that the rock test block of surface indentation is always positioned at during the test below upper plate, plays good splash-proof
Effect.
The Carrier box is rectangular box, and flexible connector is symmetrically distributed in four angles of Carrier box, and each angle is at least arranged
One, balanced support force is provided rock test block together.
The flexible connector uses spring, and spring upper end connect with the upper plate of Carrier box main part, lower spring end and
Lower plate connection.
The top margin of the side plate is fixed together with upper board edge, and the height h of side plate is less than rock test block vertically taper
The height dimension H of pressure head axial direction is prevented before rock test block and upper conical pressure head offset, and side plate bottom edge and lower plate occur to do
The positioning of rock test block is related to and influences, while the small blocks formed after preventing rock test block from splitting again are scattered completely, after facilitating
The splicing recovery operation of phase.
The height h of the side plate is greater than or equal to the rock test block vertically height dimension H of conical indenter axial direction
1/2, so that side plate forms enough splashproof occlusion areas in rock test block periphery.
The through-hole one and through-hole two are circular hole, and the center of circle of through-hole one and through-hole two is respectively positioned on the axis of upper and lower conical indenter
On heart line, one aperture of through-hole is greater than 1~3mm of diameter of upper conical pressure head, and the aperture of through-hole two is greater than the diameter 1 of inferior pyramidal pressure head
~3mm, to prevent edge and the upper and lower conical indenter side wall of through-hole one, through-hole two from interfering, by the size of through-hole one and through-hole two
It is arranged to suitable size, and upper plate can be made to form enough splashproof occlusion areas above rock test block, makes lower plate to rock
Test block provides sufficiently stable bearing area.The aperture of through-hole one and through-hole two cannot be too small, can not be excessive, it is too small can with it is upper
The interference of inferior pyramidal pressure head, placement and fixation excessive and that will affect rock test block, due to the rock test block chosen during test
Size be generally larger than the diameter of conical indenter up and down, through-hole one and through-hole two are sized to than upper and lower conical indenter
The big 1~3mm of size, substantially can guarantee rock test block size be greater than through-hole one and through-hole two size.
The connecting component is removably to connect with the connection of Point Load Strength Instrument support frame, is such as bolted or buckles
Connection, so that connecting component and the installation site of Carrier box can according to need and be adjusted.
The connecting component is connecting rod, and connecting rod is two for being symmetricly set on Carrier box two sides, the connecting rod
Preferably Y shape connecting rod is connect in every connecting rod with the carrying box main body there are two tie point, and another tie point and
The support frame of the Point Load Strength Instrument connects.Y-shaped structure is set by connecting rod, the stability of Carrier box can be increased, prevented
Carrier box swings up and down or even glances off.
The side plate is imperforate plate, and position of the upper plate in addition to through-hole one is non-porous structure, and the lower plate uses
Web plate with mesh 121, mesh for leaking out the rock test block clast to be formed that splits in time, in order to avoid under the influence of a test block examination
It tests.Since Point Load Tests will generally carry out hundreds and thousands of tests, the clast that each piece of rock test block generates can be discharged in time,
Overall work intensity will be mitigated significantly, improve working efficiency.Or the lower plate is screen net structure, and the silk thread in screen net structure
Diameter is 0.5~5mm, preferably 1~3mm, and the hole size in screen net structure is that (such as length, width or diameter are single for unidirectional size
The size in a direction) it is 3~30mm, preferably 5~20mm.
The connecting component, upper plate, lower plate and side plate material use metal material, as stainless steel, alloy, carbon steel or
Iron.
The present invention also provides a kind of Point Load Strength Instrument, the Point Load Strength Instrument includes that the rock test block is fixed
Device.
The present invention at least has the advantages that
For the present invention by the way that flexible connector is arranged between the upper plate and lower plate of Carrier box, lower plate is arranged to can be along thickness
Just flexible movable structure, when needing to place rock test block, pulling open lower plate can be put into, and rock test block is placed on through-hole
At two positions, lower plate can carry rock test block and be upwardly into offset with upper conical pressure head, during test, it is no longer necessary to manually use hand
Grasping rock test block is gone, safety is eliminated and falls into and suffer from, and whole device structure is simplified, it is convenient to operate, and operator can vacate one
Hand is used to press jack or does other work, in inferior pyramidal pressure head uphill process, it is no longer necessary in order to keep rock test block position
The fixed and posture that makes body that certain be kept to fix, the sight of operator without staring at whether inferior pyramidal pressure head touches again
Rock test block, then the strength values that pressure sensor is shown by display can be observed, so that needing two people to match in the past
Closing the Point Load Tests completed can be completed by a people, protect the safety of testing crew, improve the convenience of operation, save people
Power.
The present invention plays splashproof to rock test block by the upper plate and side plate of Carrier box, the same of safety is tested in enhancing
When, also prevented the small blocks formed after rock test block is split occur avalanche and long range it is mobile a possibility that, facilitate fritter
The splicing in body later period is restored, and ensure that the spliced integrality of small blocks to the greatest extent, is carried out with the whole test block before test
Comparative analysis.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
Below with reference to figure, the present invention is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is that the rock test block of the preferred embodiment of the present invention is fixed device installation effect figure (main view direction)；
Fig. 2 is that (upper plate is shown as in Fig. 2 for the fixed device three-dimensional structure diagram of rock test block of the preferred embodiment of the present invention
Bright structure)；
In figure: 1- Carrier box, 11- upper plate, 12- lower plate, 121- mesh, 13- side plate, 14- flexible connector (spring),
15- through-hole one, 16- through-hole two, 17- screw；
2- Point Load Strength Instrument, 20- pedestal, the upper horizontal support of 21-, horizontal support under 22-, the left vertical supporting bar of 23-,
The right vertical supporting bar of 24-, 25- jack, 26- location nut, 27- inferior pyramidal pressure head, the upper conical pressure head of 28-, 29- display；
3- connecting component, 4- rock test block.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be limited according to claim
Fixed and covering multitude of different ways is implemented.
A kind of fixed device of rock test block for Point Load Tests, the fixed device of the rock test block are set to fluid pressure type point
On loading test instrument 2, referring to Fig. 1, the Point Load Strength Instrument includes pedestal 20 and the jack being set on the base 25, very heavy
It is fixedly connected with support frame on the large tank cylinder body of top, support frame includes upper horizontal support 21, lower horizontal support 22, left vertical supporting
Bar 23 and right vertical supporting bar 24, left vertical supporting bar and right vertical supporting be arranged in parallel and the lower end of the two respectively with lower transverse direction
Bracket both ends are fixedly connected, and upper end is threaded through in the preset pilot hole of horizontal support, and pass through 26 locking positioning of location nut,
After unclamping location nut 26, upper horizontal support can slide up and down along left vertical supporting bar and right vertical supporting bar, so that upper transverse direction
Vertical distance between bracket and lower horizontal support is adjustable, and the intermediate position of lower horizontal support and jack large tank cylinder body are solid
Fixed connection, lower horizontal support is equipped with the jack large tank cylinder body portion of being fixedly connected to be stretched out upwards for jack large tank piston rod
Via hole (not shown in figure 1)；For the setting of inferior pyramidal pressure head 27 in jack large tank piston rod part, upper conical pressure head 28 is fixed
In upper horizontal support bottom, upper conical pressure head is vertically arranged with inferior pyramidal pressure head and keeps coaxial positional relationship；Pedestal and branch
Support system of the support as Point Load Strength Instrument, jack, upper conical pressure head and inferior pyramidal pressure head are then used as Point Load Tests
The loading system of instrument in the present embodiment, is embedded with pressure sensor (not shown in figure 1), pressure sensor in upper conical pressure head
It is electrically connected with the display 29 for showing Real-time intensity numerical value, pressure sensor and display are then used as Point Load Strength Instrument
Dynamometric system, the fixed device setting of rock test block proposed by the invention is in left vertical supporting bar 23 and right vertical supporting bar 24
Between.
The fixed device of rock test block referring to fig. 2, including for placing rock test block 4 Carrier box 1 and the company of being used to support
Connect the connecting component 3 of Carrier box.
Described connecting component one end is connect with the side plate 13 of the Carrier box, the support frame of the other end and Point Load Strength Instrument
Connection, referring to Fig. 1 and Fig. 2, the connecting component 3 of the fixed device of rock test block is two of bilateral symmetry distribution, connecting component
The axial direction setting of width direction vertically conical indenter, the connecting component left end on the left side is detachably attached to by screw 17
On left vertical supporting bar, two tie points of right end and the left side plate-side plate welding of Carrier box are fixed together；The interconnecting piece on the right
Part right end is detachably attached on right vertical supporting bar by screw 17, and two tie points of left end and the right side plate of Carrier box weld
It connects and is fixed together, according to the size of rock test block, high and low position of the adjustable coupling part on the vertical supporting bar of left and right, and
Rock test block 4 is set to touch upper conical pressure head 28.
The Carrier box is rectangular box, and Carrier box includes upper plate 11, lower plate 12 and side plate 13, and side plate can be one piece of bending
Whole plate, or four pieces of slide plates are spliced, and carrying box main body, upper plate is formed by welding in upper board edge and four top margins of side plate
Positioned at the position close to upper conical 28 bottom of pressure head, carrying box main body is connect as fixed part with connecting component 3, lower plate conduct
Movable part is connect by flexible connector 14 with carrying box main body, is arranged on the upper plate in the position of the upper conical pressure head of correspondence
Have and extend downwardly into through-hole 1 inside Carrier box for upper conical pressure head 28, in the position of corresponding inferior pyramidal pressure head in the lower plate
It installs to be equipped with and extends upwardly into through-hole 2 16 inside Carrier box, the elastic force direction of the flexible connector for inferior pyramidal pressure head 27
It is arranged along the vertical direction, the elastic force of the flexible connector is greater than the sum of rock test block and the gravity of lower plate, so that rock is tried
Block is placed at the position of the through-hole two in lower plate and is aligned after upper conical pressure head, and rock test block can be in the bullet of flexible connector
Power effect under with lower plate be moved upward to it is final offset with upper conical pressure head, to complete the positioning of rock test block.
Due to the presence of flexible connector, lower plate is that one kind is automatic after bursting apart with rock test block to the support of rock test block
The dynamic support moved up can effectively avoid rock test block that falling for similar free fall type occurs, thus utmostly
The reset condition that ensure that the small blocks formed after rock test block is burst apart, facilitate the splicing recovery and comparative analysis work in later period
Make.In the present invention, through-hole two also has auxiliary positioning while as the channel passed through for inferior pyramidal pressure head, to rock test block
Effect, pull open lower plate downwards, rock test block be placed at through-hole two, that is, can guarantee rock test block be located at through-hole one with it is upper conical
The lower section of pressure head, subsequent need to be finely adjusted to the position of rock test block or not need substantially adjustment rock test block position, save
Shi Shengli improves test efficiency.
The position of the upper plate is set above upper conical 3~8mm of pressure head bottom, that is, upper conical pressure head bottom via through holes
One protrudes into about 3~8mm, preferably 5mm in Carrier box, this high bottom generally can be recessed greater than rock test block and upper conical pressure head contact position
Depth is fallen into, so that the rock test block of surface indentation is always positioned at during the test below upper plate, plays good splash-proof
Effect, it is ensured that the safety of experimenter.
Referring to fig. 2, in the present embodiment, flexible connector is symmetrically distributed in four angles of Carrier box, and each angle is arranged one
Coefficient of elasticity is that spring of the coefficient of elasticity of spring between 100~300N/m, preferably 200N/m together proposes rock test block
For balanced support force.
The flexible connector uses spring, and spring upper end connect with the upper plate of Carrier box main part, lower spring end and
Lower plate connection.
The top margin of the side plate is welded and fixed together with upper board edge, and the height h of side plate is less than rock test block vertically
The height dimension H of conical indenter axial direction is prevented before rock test block and upper conical pressure head offset, and side plate bottom edge and lower plate are sent out
The positioning of rock test block is interfered and is influenced in life, while the small blocks formed after preventing rock test block from splitting again are scattered completely, are helped
In the splicing recovery operation in later period.
The height h of the side plate or equal to rock test block vertically the height dimension H of conical indenter axial direction 1/2,
So that side plate forms enough splashproof occlusion areas in rock test block periphery.
The through-hole one and through-hole two are circular hole, and the center of circle of through-hole one and through-hole two is respectively positioned on the axis of upper and lower conical indenter
On heart line, one aperture of through-hole is greater than the diameter 2mm of upper conical pressure head, and the aperture of through-hole two is greater than the diameter 2mm of inferior pyramidal pressure head,
To prevent edge and the upper and lower conical indenter side wall of through-hole one, through-hole two from interfering, and upper plate is made to form foot above rock test block
Enough splashproof occlusion areas make lower plate provide sufficiently stable bearing area to rock test block.
In the present embodiment, the side plate is imperforate plate, and position of the upper plate in addition to through-hole one is non-porous structure, institute
Lower plate is stated using the irony silk screen with mesh 121, mesh is for leaking out the rock test block clast to be formed that splits in time, Yi Mianying
Ring the test of next test block.Since Point Load Tests will generally carry out hundreds and thousands of tests, what each piece of rock test block generated
Clast can be discharged in time, will mitigate overall work intensity significantly, improve working efficiency.Certainly, if the lower plate is no mesh
Plate when, the clast that pressure break rock test block generates can be cleared away in time after each Point Load Tests.In the present embodiment,
Connecting component, upper plate, lower plate and side plate are irony plate.
In the present embodiment, the size of Carrier box is long 10cm × wide 10cm × high 2cm, and lower plate mesh size is 1cm
× 1cm, lower plate iron wire diameter are 2mm, and it is long 10cm × wide 10cm that lower plate is consistent with upper board size, and four pieces of side plate sizes are equal
For long 10cm × wide 2cm.Four angles of lower plate wire netting are connected by four small springs 14 with four angles of upper plate, lower plate energy
It enough floats up and down, convenient for being put into rock test block 4, is also capable of fixing rock test block, when not placing rock test block in Carrier box, lower plate
It is contacted under the pulling of spring with side plate bottom edge.
Using the fixed device of rock test block of the invention carry out the processes of Point Load Tests approximately as:
The fixed device of rock test block is installed to Point Load Strength Instrument, unscrews screw 17 and adjusts the fixed dress of rock test block
The position set, protrudes into 5mm or so in Carrier box to upper conical pressure head bottom and can tighten screw 17 and fix Carrier box.It opens and surveys
Initial data is zeroed by Force system.
Lower plate is pulled open downwards, rock test block 4 is put at two position of through-hole of Carrier box, is pulled by the pulling force of spring 14
Lower plate fixes rock test block.
Jack oil valve is opened, very heavy compression bar is shaken and is loaded, stops load after rock test block rupture, by aobvious
Show that device 29 reads the point load strength of rock test block, retract inferior pyramidal pressure head, pull open lower plate downwards, takes out broken obtain
Small blocks are put into designated position and wait for that the later period carries out comparative study, carry out the Point Load Tests of next rock test block.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of fixed device of rock test block for Point Load Tests, which is characterized in that including for placing rock test block (4)
Carrier box (1) and be used to support the connecting component (3) of connection Carrier box, described connecting component one end and the Carrier box connect
It connects, the support frame connection of the other end and Point Load Strength Instrument, the Carrier box includes upper plate (11), lower plate (12) and side plate
(13), the upper plate and side plate constitute carrying box main body, and carrying box main body is connect with connecting component, and lower plate passes through flexible connector
(14) it connect with carrying box main body, is provided on the upper plate in the position of the upper conical pressure head of correspondence for upper conical pressure head (28)
The through-hole one (15) inside Carrier box is extended downwardly into, is provided in the lower plate in the position of corresponding inferior pyramidal pressure head for lower cone
Shape pressure head (27) extends upwardly into the through-hole two (16) inside Carrier box, and the elastic force of the flexible connector is greater than rock test block under
The sum of gravity of plate, so that at the position for the through-hole two rock test block being placed in lower plate and after the upper conical pressure head of alignment,
Rock test block can the elastic force of flexible connector effect under with lower plate be moved upward to it is final offset with upper conical pressure head, to make
Rock test block is fixed.
2. a kind of fixed device of rock test block for Point Load Tests according to claim 1, which is characterized in that described
Upper plate is located at close to the position of upper conical pressure head (28) bottom, and when doing Point Load Tests, the position of the upper plate is set as high
In upper conical pressure head bottom.
3. a kind of fixed device of rock test block for Point Load Tests according to claim 1, which is characterized in that described
Flexible connector uses spring, and spring upper end is connect with the upper plate of Carrier box main part, and lower spring end is connect with lower plate.
4. a kind of fixed device of rock test block for Point Load Tests according to claim 1, which is characterized in that described
The elastic force direction of flexible connector is arranged along the vertical direction, and the Carrier box is rectangular box, and flexible connector, which is symmetrically distributed in, to be held
Four angles of box are carried, each angle is at least arranged one.
5. a kind of fixed device of rock test block for Point Load Tests according to claim 1, which is characterized in that described
The top margin of side plate is fixed together with upper board edge, and the height h of side plate is less than rock test block vertically conical indenter axial direction
Height dimension H, the height h of the preferably described side plate is greater than or equal to the height of rock test block vertically conical indenter axial direction
The 1/2 of size H.
6. a kind of fixed device of rock test block for Point Load Tests according to claim 1, which is characterized in that described
Through-hole one and through-hole two are circular hole, and through-hole one and the center of circle of through-hole two are respectively positioned on the axial line of upper and lower conical indenter, through-hole
One is greater than 1~3mm of diameter of upper and lower conical indenter with the aperture of through-hole two.
7. a kind of fixed device of rock test block for Point Load Tests according to claim 1, which is characterized in that described
Connecting component is connecting rod, and preferably the connecting rod is Y shape connecting rod, and there are two tie point and institutes in every Y shape connecting rod
Carrying box main body connection is stated, and another tie point is connect with the support frame of the Point Load Strength Instrument.
8. a kind of fixed device of rock test block for Point Load Tests according to claim 1, which is characterized in that described
Connecting component is removably to connect with the connection of Point Load Strength Instrument support frame, is such as bolted or snaps connection.
9. a kind of fixed device of rock test block for Point Load Tests described according to claim 1~any one of 8,
It is characterized in that, the lower plate uses the web plate with mesh (121)；Or the lower plate is screen net structure.
10. a kind of fixed device of rock test block for Point Load Tests according to claim 9, which is characterized in that institute
Stating wire diameter in screen net structure is 0.5~5mm, preferably 1~3mm, the hole size in screen net structure be unidirectional size 3~
30mm, preferably 5~20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811592734.8A CN109443913A (en) | 2018-12-25 | 2018-12-25 | A kind of fixed device of rock test block for Point Load Tests |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811592734.8A CN109443913A (en) | 2018-12-25 | 2018-12-25 | A kind of fixed device of rock test block for Point Load Tests |
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| CN109443913A true CN109443913A (en) | 2019-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811592734.8A Pending CN109443913A (en) | 2018-12-25 | 2018-12-25 | A kind of fixed device of rock test block for Point Load Tests |
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