CN209215119U - A kind of Point Load Strength Instrument - Google Patents
A kind of Point Load Strength Instrument Download PDFInfo
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- CN209215119U CN209215119U CN201822189617.9U CN201822189617U CN209215119U CN 209215119 U CN209215119 U CN 209215119U CN 201822189617 U CN201822189617 U CN 201822189617U CN 209215119 U CN209215119 U CN 209215119U
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- test block
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- rock test
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- carrier box
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Abstract
The utility model provides a kind of Point Load Strength Instrument, Point Load Strength Instrument includes for placing the Carrier box with fixed 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 utility model makes 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 utility model relates to Point Load Tests equipment, especially a kind of Point Load Tests for having sample fixing device
Instrument.
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.
Utility model content
The utility model aim is to provide a kind of Point Load Strength Instrument, to solve the problems, such as to propose in background technique.
A kind of Point Load Strength Instrument, including the fixed device of support device, loading device, device for measuring force and rock test block, institute
Stating support device includes horizontal support and vertical supports, and the loading device includes jack 25, inferior pyramidal pressure head 27 and epicone
Shape pressure head 28, the device for measuring force include the pressure sensor being located on upper conical pressure head and are electrically connected with pressure sensor
Display 29, the fixed device of the rock test block include Carrier box 1 and the company of being used to support for placing and fixing rock test block 4
The connecting component 3 of Carrier box is connect, the connecting component is used to the Carrier box being connected to the support device, the carrying
Box includes upper plate 11, lower plate 12, side plate 13 and flexible connector 14, is provided with through-hole 1 on the upper plate, in the lower plate
It is provided with through-hole 2 16, the plate of the upper plate, lower plate and side plate is optionally imperforate plate and/or mesh plate, and described non-porous
Plate includes plate or arc plate, and the upper plate constitutes carrying box main body with side plate and is used to connect and be used for the connecting component
Post-fracturing rock fragment is blocked to splash, the lower plate by the flexible connector connect with the Carrier box body elastic with
Toilet states rock test block being placed and taken out in Carrier box, is used to place at the through-hole two being arranged in the lower plate to be tested
Rock test block and through-hole two are set as extending upwardly into inside Carrier box for inferior pyramidal pressure head 27, and through-hole one is set as epicone
Shape pressure head 28 extends downwardly into inside Carrier box, and the through-hole one and through-hole two are oppositely arranged in the vertical direction, the upper plate
Positioned at the position close to upper conical pressure head bottom, the elastic force of the flexible connector be greater than rock test block and lower plate gravity it
With so that rock test block can 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
Flexible connector elastic force effect under with lower plate be moved upward to it is final offset with upper conical pressure head, to make rock test block quilt
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.
The support device includes two vertical supporting bars of two horizontal supports being distributed up and down and left and right distribution, and two is perpendicular
It is arranged in parallel to support rod and the lower end of the two is fixedly connected with the both ends of underlying horizontal support respectively, two vertical supportings
Bar upper end is threaded through in the preset pilot hole of the horizontal support being located above, and passes through two 26 locking positionings of location nut, pine
After opening location nut 26, upper horizontal support can slide up and down along left vertical supporting bar and right vertical supporting bar, so that upper and lower two
Vertical distance between horizontal support is adjustable, and the intermediate position of the horizontal support of lower section is fixedly connected with loading device.
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
Stone 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 be with
Upper and lower conical indenter interference, placement and fixation excessive and that will affect rock test block, due to the rock examination chosen during test
The size of block is generally larger than the diameter of conical indenter up and down, and through-hole one and through-hole two are sized to than upper inferior pyramidal pressure
Big 1~the 3mm of size of head substantially can guarantee that the size of rock test block is greater than the size of through-hole one and through-hole two.
The connection of the connecting component and support device is dismountable connection, is such as bolted or snaps connection, so that
The installation site of connecting component and 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
Support device connection.Y-shaped structure is set by connecting rod, the stability of Carrier box can be increased, prevents Carrier box from the upper bottom occurs
It is dynamic even to glance off.
The Y shape connecting rod is connected and composed by two blocks of bending plate mirror images, and position is bonded blending bolt among two pieces of bending plates
It is fixed or be welded and fixed, two pieces of bending plates be used to connect carry box main body an end yoke be divided into 45~90 degree angle and respectively with
Together, the vertical supports include left and right vertical supporting bar to Carrier box plate-side plate welding, and two pieces of bending plates are perpendicular for connecting left and right
Be provided with to one end of support rod is used to connect left and right vertical with the matched imitation profile of vertical supporting bar outer cylinder, two pieces of bending plates
Vertical supporting bar is held tightly by screw 17 and realizes the connection with vertical supporting bar in one end of support rod.
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.
Use the Point Load Tests method of the Point Load Strength Instrument, comprising the following steps:
1) installation of the fixed device of rock test block: the Carrier box for being connected with connecting component is placed in below upper conical pressure head,
Carrier box is moved up, supreme conical indenter bottom via through holes one protrude into 3~8mm in Carrier box, and the connecting component is used
It is fixed in support device in one end of connection support device by screw 17, fixes the fixed device of rock test block；
2) fixation of rock test block: pulling open downwards lower plate, and rock test block 4 is put at two position of through-hole of Carrier box, according to
Pulling force by flexible connector 14 pulls lower plate to fix rock test block；
3) cracking pressure sensor and display, the compression bar for shaking jack, inferior pyramidal pressure head are in jack piston rod
Driving is lower to be risen, and via through holes two enter in Carrier box and transmit the force to rock test block, until stopping shaking after rock test block rupture
Compression bar reads the point load strength of rock test block through display；
4) jack piston rod and inferior pyramidal pressure head are retracted downwards, pulls open lower plate downwards, take out it is broken obtain it is small
Block is put into designated position and waits for that the later period carries out comparative study, carries out the Point Load Tests of next rock test block.
The utility model at least has the advantages that
For the utility model by the way that flexible connector is arranged between the upper plate and lower plate of Carrier box, lower plate is arranged to can edge
The flexible movable structure in thickness side, when needing to place rock test block, pulling open lower plate can be put into, and rock test block is placed on
At two position of through-hole, 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 artificial
Grasping rock test block is gone with hand, 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 is fixed and the posture that makes body that certain be kept to fix, and the sight of operator without staring at whether inferior pyramidal pressure head connects again
It contacts rock test block, then the strength values that pressure sensor is shown by display can be observed, so that needing two in the past
People cooperates the Point Load Tests completed that can be completed by a people, protects the safety of testing crew, improves the convenience of operation, saves
Human-saving.
The utility model plays splashproof to rock test block by the upper plate and side plate of Carrier box, safety is tested in enhancing
Meanwhile also prevented the small blocks formed after rock test block is split occur avalanche and long range it is mobile a possibility that, facilitate small
The splicing in block later period is restored, and ensure that the spliced integrality of small blocks to the greatest extent, with the whole test block before test into
Row comparative analysis.
Other than objects, features and advantages described above, there are also other purposes, feature and excellent for the utility model
Point.Below with reference to figure, the utility model is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide a further understanding of the present invention, the utility model
Illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model.In attached drawing
In:
Fig. 1 is the Point Load Strength Instrument main view of the preferred embodiment in the utility model；
Fig. 2 is that (upper plate is shown in Fig. 2 for the fixed device three-dimensional structure diagram of rock test block of the preferred embodiment in the utility model
For transparent configuration)；
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；
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 embodiments of the present invention are described in detail below in conjunction with attached drawing, but the utility model can be according to power
Benefit requires to limit and the multitude of different ways of covering is implemented.
A kind of Point Load Strength Instrument, including the fixed device of rock test block, the fixed device of the rock test block are set to hydraulic
In formula Point Load Strength Instrument main body 2, referring to Fig. 1, the Point Load Strength Instrument further includes support device, pedestal 20 and is arranged the bottom of at
Loading device on seat, in the present embodiment, loading device includes jack 25, is fixedly connected on jack large tank cylinder body
Support device is stated, support device includes horizontal support and vertical supports, and the horizontal support includes upper horizontal support 21 and lower cross
To bracket 22, the vertical supports include left vertical supporting bar 23 and right vertical supporting bar 24, and left vertical supporting bar and the right side are vertical
Support is arranged in parallel and the lower end of the two is fixedly connected with lower horizontal support both ends respectively, and it is default that upper end is threaded through horizontal support
Pilot hole in, and by two 26 locking positionings of location nut, after unclamping location nut 26, upper horizontal support can be along Zuo Shuxiang
Support rod and right vertical supporting bar slide up and down, so that the vertical distance between upper horizontal support and lower horizontal support is adjustable,
The intermediate position of lower horizontal support is fixedly connected with jack large tank cylinder body, and lower horizontal support and jack large tank cylinder body are solid
Determine interconnecting piece and is equipped with the via hole (not shown in figure 1) stretched out upwards for jack large tank piston rod；Inferior pyramidal pressure head 27 is arranged
In jack large tank piston rod part, upper conical pressure head 28 is fixed on horizontal support bottom, upper conical pressure head and inferior pyramidal
Pressure head is vertically arranged and keeps coaxial positional relationship；In the present embodiment, loading device further includes being embedded in upper conical pressure head
Pressure sensor (not shown in figure 1), and the display for being used to show Real-time intensity numerical value being electrically connected with pressure sensor
29, the fixed device setting of rock test block that the utility model is proposed left vertical supporting bar 23 and right vertical supporting bar 24 it
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 dress of the other end and Point Load Strength Instrument
Connection is set, referring to Fig. 1 and Fig. 2, the connecting component 3 of the fixed device of rock test block is two Y shape connecting rods of bilateral symmetry distribution,
The axial direction setting of the width direction of connecting component vertically conical indenter, the connecting component left end on the left side can by screw 17
In dismantling connection to left vertical supporting bar, two tie points of right end and the left side plate-side plate welding of Carrier box are fixed together；It is right
The connecting component right end on side is detachably attached on right vertical supporting bar by screw 17, two tie points and Carrier box of left end
Right side plate be welded and fixed together.Each Y shape connecting rod is connected and composed by two blocks of bending plate mirror images, among two pieces of bending plates
Position fitting blending bolt is fixed or is welded and fixed, and the end yoke that two pieces of bending plates are used to connect carrying box main body is divided into 60 degree
Angle and respectively together with Carrier box plate-side plate welding, the vertical supports include left and right vertical supporting bar, and two pieces of bending plates are used
It is provided with and the matched imitation profile of left and right vertical supporting bar outer cylinder, two pieces of bending plates in one end of connection left and right vertical supporting bar
Vertical supporting bar in left and right is held tightly by screw 17 and is realized and left and right vertical supporting in one end for connecting left and right vertical supporting bar
The connection of bar 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 makes rock
Stone test block 4 can 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 utility model, through-hole two also has auxiliary to rock test block while as the channel passed through for inferior pyramidal pressure head
Positioning action pulls open downwards lower plate, and rock test block is placed at through-hole two, that is, can guarantee rock test block be located at through-hole one with it is upper
The lower section of conical indenter, subsequent need to be finely adjusted to the position of rock test block or not need substantially adjustment rock test block position
It sets, it is time saving and energy saving, improve 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 the rock test block of the utility model 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 above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of Point Load Strength Instrument, which is characterized in that solid including support device, loading device, device for measuring force and rock test block
Determine device, the support device includes horizontal support and vertical supports, and the loading device includes jack (25), inferior pyramidal pressure
Head (27) and upper conical pressure head (28), the device for measuring force include the pressure sensor being located on upper conical pressure head and pass with pressure
The display (29) that sensor is electrically connected, the fixed device of the rock test block includes for placing and fixing rock test block (4)
Carrier box (1) and the connecting component (3) for being used to support connection Carrier box, the connecting component is for the Carrier box to be connected to
In the support device, the Carrier box includes upper plate (11), lower plate (12), side plate (13) and flexible connector (14), described
It is provided with through-hole one (15) on upper plate, through-hole two (16) is provided in the lower plate, the plate of the upper plate, lower plate and side plate is appointed
Selection of land is imperforate plate and/or mesh plate, and the imperforate plate includes plate or arc plate, and the upper plate and side plate constitute Carrier box master
It body and splashes for connect with the connecting component and for blocking post-fracturing rock fragment, the lower plate passes through the bullet
Property connector connect being placed and taken out in Carrier box so as to the rock test block with the Carrier box body elastic, under described
At the through-hole two being arranged on plate for place rock test block to be tested and through-hole two be set as inferior pyramidal pressure head (27) to
On protrude into inside Carrier box, through-hole one is set as extending downwardly into inside Carrier box for upper conical pressure head (28), and the through-hole
One and through-hole two be oppositely arranged in the vertical direction.
2. a kind of Point Load Strength Instrument according to claim 1, which is characterized in that when doing Point Load Tests, it is described on
The position of plate is set above upper conical pressure head bottom.
3. a kind of Point Load Strength Instrument according to claim 1, which is characterized in that the flexible connector uses spring,
Spring upper end is connect with the upper plate of Carrier box main part, and lower spring end is connect with lower plate, and the elastic force of the flexible connector is big
In the sum of rock test block and the gravity of lower plate, so that at the position for the through-hole two rock test block being placed in lower plate and in alignment
After conical indenter, rock test block can be moved upward to final and upper conical pressure with lower plate under the effect of the elastic force of flexible connector
Head offsets, so that rock test block be made to be fixed.
4. a kind of Point Load Strength Instrument according to claim 1, which is characterized in that the elastic force direction of the flexible connector
It is arranged along the vertical direction, the Carrier box is rectangular box, and flexible connector is symmetrically distributed in four angles of Carrier box, and each angle is extremely
One is arranged less.
5. a kind of Point Load Strength Instrument according to claim 1, which is characterized in that the top margin and upper board edge of the side plate
It is fixed together, the height h of side plate is less than the height dimension H of rock test block vertically conical indenter axial direction, the side plate
Height h be greater than or equal to rock test block vertically the height dimension H of conical indenter axial direction 1/2.
6. a kind of Point Load Strength Instrument according to claim 1, which is characterized in that the through-hole one and through-hole two are circle
The center of circle of hole, through-hole one and through-hole two is respectively positioned on the axial line of upper and lower conical indenter, and through-hole one and the aperture of through-hole two are greater than
1~3mm of diameter of upper and lower conical indenter.
7. a kind of Point Load Strength Instrument according to claim 1, which is characterized in that the connecting component is connecting rod, and
The connecting rod is Y shape connecting rod, is connect there are two tie point with the carrying box main body in every Y shape connecting rod, and another
A tie point is connect with support device；
The Y shape connecting rod is connected and composed by two blocks of bending plate mirror images, and position fitting blending bolt is fixed among two pieces of bending plates
Or be welded and fixed, two pieces of bending plates be used to connect carry box main body an end yoke be divided into 45~90 degree angle and respectively with carrying
Together, the vertical supports include left and right vertical supporting bar to box plate-side plate welding, and two pieces of bending plates are for connecting the vertical branch in left and right
One end of strut is provided with to be used to connect left and right vertical supporting with the matched imitation profile of vertical supporting bar outer cylinder, two pieces of bending plates
Vertical supporting bar is held tightly by screw (17) and realizes the connection with vertical supporting bar in one end of bar.
8. a kind of Point Load Strength Instrument according to claim 1, which is characterized in that the connecting component and support device
It is connected as removably connecting, is such as bolted or snaps connection.
9. a kind of Point Load Strength Instrument described according to claim 1~any one of 8, which is characterized in that the lower plate is adopted
With the web plate with mesh (121)；Or the lower plate is screen net structure, the wire diameter in the screen net structure is 0.5~
5mm, the hole size in screen net structure are unidirectional 3~30mm of size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822189617.9U CN209215119U (en) | 2018-12-25 | 2018-12-25 | A kind of Point Load Strength Instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822189617.9U CN209215119U (en) | 2018-12-25 | 2018-12-25 | A kind of Point Load Strength Instrument |
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| Publication Number | Publication Date |
|---|---|
| CN209215119U true CN209215119U (en) | 2019-08-06 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822189617.9U Expired - Fee Related CN209215119U (en) | 2018-12-25 | 2018-12-25 | A kind of Point Load Strength Instrument |
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| Country | Link |
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| CN (1) | CN209215119U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443946A (en) * | 2018-12-25 | 2019-03-08 | 长沙矿山研究院有限责任公司 | A kind of Point Load Strength Instrument and Point Load Tests method |
| CN113358482A (en) * | 2021-06-21 | 2021-09-07 | 重庆交通大学 | Class rock material fracture toughness testing arrangement with test piece retrieves function |
-
2018
- 2018-12-25 CN CN201822189617.9U patent/CN209215119U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443946A (en) * | 2018-12-25 | 2019-03-08 | 长沙矿山研究院有限责任公司 | A kind of Point Load Strength Instrument and Point Load Tests method |
| CN109443946B (en) * | 2018-12-25 | 2024-03-08 | 长沙矿山研究院有限责任公司 | Point load tester and point load test method |
| CN113358482A (en) * | 2021-06-21 | 2021-09-07 | 重庆交通大学 | Class rock material fracture toughness testing arrangement with test piece retrieves function |
| CN113358482B (en) * | 2021-06-21 | 2023-10-10 | 重庆交通大学 | Rock-like material fracture toughness testing device with test piece recovery function |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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