CN111426583A - Rock drilling specific work tester and test method thereof - Google Patents

Rock drilling specific work tester and test method thereof Download PDF

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Publication number
CN111426583A
CN111426583A CN202010350761.5A CN202010350761A CN111426583A CN 111426583 A CN111426583 A CN 111426583A CN 202010350761 A CN202010350761 A CN 202010350761A CN 111426583 A CN111426583 A CN 111426583A
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China
Prior art keywords
rock sample
guide rod
rock
drill bit
tester
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CN202010350761.5A
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Chinese (zh)
Inventor
穆伟
王永安
王韫楠
郑复鹏
梁宗旭
叶露
李顺利
陈子昂
吴俊婷
汲江涛
王晓静
杨玉杰
杨志邦
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Xi'an Ya Xing Civil Engineering Instrument Co ltd
Gansu Huantong Engineering Test And Detection Co ltd
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Xi'an Ya Xing Civil Engineering Instrument Co ltd
Gansu Huantong Engineering Test And Detection Co ltd
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Priority to CN202010350761.5A priority Critical patent/CN111426583A/en
Publication of CN111426583A publication Critical patent/CN111426583A/en
Pending legal-status Critical Current

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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
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
    • G01B5/12—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters internal diameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/18—Measuring arrangements characterised by the use of mechanical techniques for measuring depth
    • 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
    • G01N3/06—Special adaptations of indicating or recording means
    • G01N3/062—Special adaptations of indicating or recording means with mechanical indicating or recording 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
    • G01N2203/0001—Type of application of the stress
    • G01N2203/001—Impulsive
    • 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
    • G01N2203/0026—Combination of several types of applied forces
    • 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
    • G01N2203/0053—Cutting or drilling tools
    • 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
    • G01N2203/0682—Spatial dimension, e.g. length, area, angle

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  • Physics & Mathematics (AREA)
  • General 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)
  • Immunology (AREA)
  • Pathology (AREA)
  • Earth Drilling (AREA)

Abstract

The invention discloses a rock drilling specific power tester and a test method thereof, wherein the rock drilling specific power tester comprises a controller and a host, and the controller controls the host to complete test operation; the host comprises an operation box and a fixed base; the bottom of the operation box is provided with a rock sample fixing device, the center of the rock sample fixing device is vertically provided with a guide rod upwards, and the bottom of the guide rod is connected with a drill bit through a drill bit mounting part; a heavy hammer is sleeved on the guide rod; the top of the guide rod is provided with a fixing box for fixing the direction of the guide rod; the operating box is also internally provided with a power lifting device for lifting the heavy hammer, a hammer remover is fixed at the position of the guide rod close to the top, when the power lifting device lifts the guide rod to be in contact with the hammer remover, the hammer remover separates the heavy hammer from the power lifting device, the heavy hammer falls down and strikes the drill bit mounting part and the drill bit, and therefore rock samples are chiseled. The invention can be used for measuring the specific work of rock drilling and the sharpening width of the drill bit, thereby judging the drillability grade and the explosiveness of the rock, and has simple and convenient operation and accurate measured value.

Description

Rock drilling specific work tester and test method thereof
Technical Field
The invention relates to the technical field of rock impact drilling, in particular to a rock drilling specific power tester and a test method thereof.
Background
The specific drilling work of the rock, which is the work consumed to drill a unit volume of rock, and the dull width of the drill bit, which is the dull width of the drill bit 4mm inward from the ends of the drill bit, are both used to characterize the grindability of the rock.
In the prior art, impact is an extremely simple rock breaking means, can obtain extremely large breaking capacity instantly, and is an important method for breaking rocks. For a long time, impact-broken rock properties have been studied primarily in terms of single and repeated impacts, often requiring multiple test instruments. There are also major difficulties in determining the specific work of chipping and the width of the bit dull.
Disclosure of Invention
In view of the above-mentioned problems, the present invention is directed to provide a rock drilling specific power tester and a test method thereof for determining a rock drilling specific power and a drill bit dull width by repeated chiseling.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
rock drilling specific work tester, its characterized in that: the system comprises a controller and a host, wherein the controller is electrically connected with the host;
the host comprises an operation box and a fixed base; the operation box is positioned above the fixed base; the operation box is internally provided with a power lifting device, a rock sample fixing device, a guide rod and a drill bit;
the bottom of the operation box is provided with the rock sample fixing device, the center of the rock sample fixing device is vertically provided with a guide rod upwards, and the bottom of the guide rod is connected with a drill bit through a drill bit mounting part; the guide rod is sleeved with a heavy hammer; the top of the guide rod is provided with a fixing box for fixing the direction of the guide rod;
the power lifting device comprises a motor, a driving chain wheel and a driven chain wheel, the driving chain wheel and the driven chain wheel are connected through a chain, a lifting block is fixedly connected onto the chain, and one side of the chain is located right behind the guide rod;
a hammer removing device is fixed on the position, close to the top, of the guide rod, and the height of the hammer removing device is the same as that of the driven wheel; a counter is arranged on the inner side wall of the operating box and is positioned behind the hammer remover;
the top of the rear side of the heavy hammer is provided with a protruding block, and the lifting block can support the protruding block to drive the heavy hammer to ascend.
Furthermore, the rock sample fixing device comprises a rock sample fixer, the rock sample fixer comprises a chuck body and three movable jaws, a large bevel gear is arranged in the chuck body, a spiral groove is formed in the back of the large bevel gear, an arc strip meshed with the spiral groove is arranged at the bottom of each movable jaw, a locking handle socket is arranged on the side face of the chuck body, a small bevel gear is arranged in the locking handle socket, and the small bevel gear is meshed with the large bevel gear; the rock sample fixing device further comprises a test piece locking handle matched with the bevel pinion for use.
Further, the rock sample fixing device also comprises a rock sample cylinder, and the height of the rock sample cylinder is greater than the inner height of the rock sample fixer; the rock sample cylinder can be placed in the center of the chuck body, and the movable clamping jaws fix the rock sample cylinder.
Further, the rock sample cylinder is a steel drum.
Furthermore, evenly be equipped with the scale marking on the chuck body, the scale marking has 24, and adjacent two the contained angle is 15 degrees between the scale marking.
Furthermore, the upper part of the guide rod is of a rectangular column structure, and the joint of the lower part of the guide rod and the drill bit mounting part is of a cylindrical structure.
Furthermore, the upper part of the drill bit mounting part is of a hollow structure, the surface of the hollow structure is provided with internal threads, the bottom of the guide rod is provided with external threads, and the top of the drill bit mounting part is in threaded connection with the bottom of the guide rod.
Furthermore, a guide rod fixing plate is sleeved outside the drill bit mounting part, an opening is formed in the center of the guide rod fixing plate, the drill bit mounting part penetrates through the opening, and the drill bit mounting part can move up and down in the opening.
Furthermore, a host bottom plate is arranged below the guide rod fixing plate, the host bottom plate is of a U-shaped structure, the host bottom plate is fixedly connected with the operation box, and the host bottom plate is detachably connected with the guide rod fixing plate.
Further, the test method of the rock drilling specific power tester comprises the following steps:
s1: preparing a sample;
s2: connecting a controller and a host machine, and a controller power supply, debugging the rock drilling specific power tester, and checking and screwing screws of all parts of the tester to process a normal state;
s3: placing the prepared rock sample on a rock sample fixing device and fixing;
s4: lifting the guide rod, installing a new drill bit, and dropping the drill bit on the surface of the rock sample and enabling the drill bit to be tightly attached to the surface of the rock sample;
s5: setting the times of chiseling on the controller, and starting a chiseling test after the set times are finished;
s6: after the chiseling is finished, the drill bit is lifted and clamped tightly, and the ash on the surface of the rock sample is cleaned by a brush;
s7: loosening the rock sample, adjusting the position of the rock sample to align the rock sample to different directions, fixing the rock sample again, and chiseling the rock sample;
s8: repeating the steps S6 and S7 until the angle of the rock sample fixing device is adjusted to 360 degrees, and ending the impact rock drilling process;
s9: the diameter of the chisel hole and the depth of the chisel hole are measured by a graduated scale, and the breaking specific work and the dull grinding width of the rock are calculated.
The invention has the beneficial effects that:
1. the rock breaking specific work tester can measure the hole drilling diameter and the hole drilling depth of the rock after repeated drilling through tests, so as to obtain the rock breaking specific work; judging the drillability grade of the rock;
2. the rock drilling specific work tester can also measure the sharpening width of the drill bit of the rock and judge the explosibility of the rock;
3. the rock drilling specific work tester provided by the invention is simple and convenient to operate and accurate in measurement.
Drawings
FIG. 1 is a schematic structural diagram of a rock-drilling specific work tester according to an embodiment of the present invention;
FIG. 2 is a schematic view of a chuck support plate according to the present invention;
FIG. 3 is a side view of the weight, chain and lifting block of the present invention;
FIG. 4 is a schematic view of a rock sample holder according to the present invention;
FIG. 5 is a schematic view of the internal structure of the rock sample holder of the present invention;
FIG. 6 is a top view of the guide bar retaining plate structure of the present invention;
FIG. 7 is a top view of a motherboard structure of the present invention;
FIG. 8 is a front view of the construction of the bit mounting assembly of the present invention;
FIG. 9 is a top plan view of the bit mounting assembly construction of the present invention;
FIG. 10 is a schematic diagram of the front structure of the controller of the present invention;
fig. 11 is a schematic structural diagram of a rock drilling specific work tester in the second embodiment of the invention.
Wherein: 1-controller, 101-power switch, 102-work indicator light, 103-display screen, 104-jog button, 105-start button, 106-set storage button, 107-adjustment button, 2-operation box, 3-fixed base, 301-baseboard, 4-guide bar, 5-drill bit, 6-drill bit mounting part, 7-heavy hammer, 71-convex block, 8-fixed box, 9-driving chain wheel, 10-driven chain wheel, 11-chain, 12-lifting block, 13-hammer remover, 14-chuck supporting plate, 15-rock sample fixer, 151-chuck body, 152-movable jaw, 153-large bevel gear, 154-spiral groove, 155-arc bar, 156-locking handle socket, 157-small bevel gear, 158-rock sample cylinder, 159-scale marking, 16-test piece locking handle, 17-guide rod fixing plate, 18-main machine bottom plate and 0-rock sample.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following further describes the technical solution of the present invention with reference to the drawings and the embodiments.
The first embodiment is as follows:
the rock drilling specific work tester shown with reference to the attached drawings 1-10 comprises a controller 1 and a host, wherein the controller 1 is electrically connected with the host, and the controller 1 controls the host to complete a drilling test.
Specifically, the host computer includes control box 2 and unable adjustment base 3, unable adjustment base 3's four corners outwards is equipped with base plate 301 respectively, unable adjustment base with base plate 301 integrated into one piece, base plate 301 is used for fixing whole test instrument subaerial, base plate 301's center is equipped with the opening, and when in actual use, fix base plate 301 subaerial through the bolt.
The top of the fixed base 3 is provided with an operation box 2, and the outer wall of the fixed base 3 and the outer wall of the operation box 2 are welded or integrally formed; the operation box 2 is internally provided with a power lifting device, a rock sample fixing device, a guide rod 4 and a drill bit 5;
specifically, a chuck supporting plate 14 is arranged at the bottom of the operation box 2, a rock sample fixing device is arranged on the chuck supporting plate 14, and the rock sample fixing device comprises a rock sample fixer 15 and a test piece locking handle 16; the rock sample fixer 15 comprises a chuck body 151 and three movable jaws 152, the three movable jaws 152 are uniformly distributed, the included angle between every two movable jaws is 120 degrees, a large bevel gear 153 is arranged in the chuck body 151, a spiral groove 154 is arranged on the back of the large bevel gear 153, an arc strip 155 meshed with the spiral groove 154 is arranged at the bottom of each movable jaw 152, a locking handle socket 156 is arranged on the side surface of the chuck body 151, a small bevel gear 157 is arranged in the locking handle socket 156, and the small bevel gear 157 is meshed with the large bevel gear 153; the test piece locking handle 16 is matched with the small bevel gear 157 for use, when the test piece locking handle 16 rotates the small bevel gear 157, the small bevel gear 157 drives the large bevel gear 153 to rotate, so that the three movable jaws 152 are driven to simultaneously move in the radial direction, the rock sample 0 is placed in the center of the chuck body 151, and the three movable jaws 152 can clamp or loosen the rock sample 0.
Furthermore, scale marks 159 are uniformly arranged on the chuck body 151, the number of the scale marks 159 is 24, and an included angle between every two adjacent scale marks 159 is 15 degrees.
Further, a guide rod 4 is vertically arranged at the center of the chuck body 151 upwards, the length of the guide rod 4 is greater than 1m, and the bottom of the guide rod 4 passes through a drill bitThe mounting part 6 is connected with a drill bit 5; the drill bit 5 is a straight drill bit with the diameter
Figure BDA0002471858470000051
The blade angle is 60 degrees, 90 degrees, 110 degrees and the blade length is 60 mm. The upper portion of the drill bit mounting part 6 is of a hollow structure, internal threads are arranged on the surface of the hollow structure, the position where the bottom of the guide rod 4 is connected with the drill bit mounting part 6 is of a cylindrical structure, the position above the connection position of the guide rod 4 and the drill bit mounting part 6 is of a rectangular column structure, external threads are arranged on the outer surface of the cylindrical structure, the internal threads on the top of the drill bit mounting part 6 are matched with the external threads on the bottom of the guide rod 4, so that the guide rod 4 and the drill bit mounting part 6 are detachably connected through the threads, the bottom of the drill bit mounting part 6 is provided with the external threads, the upper portion of the drill bit 5 is provided with the internal threads, and the drill bit mounting part 6 and the drill bit 5 are also detachably connected through the.
Further, the total mass of the bit attachment member 6 and the bit 5 is 9.55 Kg.
Further, a guide rod fixing plate 17 is sleeved outside the drill bit mounting part 6, an opening is formed in the center of the guide rod fixing plate 17, the drill bit mounting part 6 penetrates through the opening, the drill bit mounting part 6 can move up and down in the opening, and the guide rod fixing plate 17 limits the drill bit mounting part 6 to prevent the drill bit mounting part 6 from rotating left and right in the up and down moving process.
Further, a host bottom plate 18 is arranged below the guide rod fixing plate 17, the host bottom plate 18 is of a U-shaped structure, the host bottom plate 18 is connected with the case 2 in a welded mode, supporting columns are arranged between the host bottom plate 18 and the guide rod fixing plate 17, thread steel is arranged on the outer surfaces of the supporting columns and is used for supporting the guide rod fixing plate 16, and the guide rod fixing plate 17 is detachably connected with the top through nuts, so that maintenance is facilitated.
Further, a heavy hammer 7 is sleeved on the guide rod 4, the heavy hammer 7 can move up and down along the guide rod 4, the weight is 4Kg, and a protruding block 71 is arranged on the rear side of the heavy hammer 7; a hammer remover 13 is welded at the position, close to the top end, of the guide rod 4, the hammer remover 13 is a cuboid iron block, the heavy hammer 7 is located at the top of the drill bit mounting part 6 in a static state, and at the moment, the distance between the hammer remover 13 and the upper end face of the heavy hammer 7 is 1 m.
Further, a power lifting device is further arranged in the operation box 2, the power lifting device comprises a motor (not shown in the figure), a driving sprocket 9 and a driven sprocket 10, the height of the driving sprocket 9 is lower than that of the top end face of the heavy hammer 7 in a static state, the height of the driven sprocket 10 is the same as that of the hammer remover 13, the driving sprocket 9 and the driven sprocket 10 are connected through a chain 11, one side of the chain 11 is located right behind the guide rod 4, and a lifting block 12 is welded on the chain 11; the motor drives the driving chain wheel 9 to rotate through the gear box, so as to drive the whole chain 11 to rotate, the lifting block 12 makes annular motion along with the chain, when the lifting block 12 moves to the right rear of the guide rod 4, the lifting block 12 lifts the protruding block 71 at the rear side of the weight 7, thereby supporting the whole weight 7 to move upwards, when the weight 7 moves to the highest point, the weight 7 is blocked by the weight remover 13, meanwhile, the lifting block 12 moves leftwards along with the rotation of the chain 11, the lifting block 12 is separated from the heavy hammer 7, the heavy hammer 7 freely falls under the action of gravity and is hammered on the drill bit mounting part 6, because the guide rod 4, the drill bit 5 and the drill bit mounting part 6 are fixedly connected, after the heavy hammer 7 is hammered towards the drill bit mounting part 6, under the impact force, the guide rod 4, the bit 5 and the bit mounting part 6 move downward together, and the bit 5 crushes the rock sample 0.
Further, a fixing box 8 for fixing the direction of the guide rod 4 is arranged at the top of the guide rod 4; the fixed box 8 is positioned at the top of the operation box 2, the inner dimension of the fixed box 8 is the same as the outer dimension of the guide rod 4, and the fixed guide rod 4 can move up and down in the fixed box 8 but cannot rotate left and right.
Further, a counter (not shown in the figure) is installed on the inner side wall of the operation box 2, and the counter is positioned behind the hammer remover 13; the counter senses the lifting times of the heavy hammer 7 at the position through infrared induction, namely the times of chiseling the rock sample 7 by the heavy hammer 7.
Further, a power switch 101, a work indicator lamp 102 and a display screen 103 are arranged on the controller 1, and a jog button 104, a start button 105, a setting storage button 106 and an adjustment button 107 are arranged below the display screen 103; the power switch 101 controls starting and stopping of the controller 1, the work indicator lamp 102 is used for indicating the working state of the whole tester, the display screen 103 is used for displaying the times of chiseling, the inching button 104 is used for inching the motor and checking the rotation direction of the chain, the starting button 105 is used for starting the whole tester, and the setting storage button 106 and the adjusting button 107 are both used for setting the times of adjusting chiseling.
The back of the controller 1 is provided with a power line socket and a tester socket, the power line socket is connected with a power supply, the rated voltage required by the tester is 380V, the rated power is 50HZ, and the tester socket is connected with the tester through a lead.
Further, the test method of the rock drilling specific power tester comprises the following steps:
s1: preparing a sample; the tester is applicable to regular cylinders, square columns and prisms of the rock sample, the height of the rock sample is the same as the inner height of the rock sample fixer (about 10cm), and two ends of the rock sample are ground flat;
s2: connecting a controller and a host machine, and a controller power supply, debugging the rock drilling specific power tester, and checking and screwing screws of all parts of the tester to process a normal state;
specifically, the controller is connected with the host, the controller is connected with a power supply, a power switch is turned on, the color of the working indicator light is observed, and the tester is ensured to be in a normal state; clicking the electric button to observe the running direction of the chain and ensure that the lifting block runs upwards when the lifting block is right behind the guide rod.
S3: placing the prepared rock sample on a rock sample fixing device and fixing;
specifically, a rock sample is placed at the center of the chuck body, a scribed line can be arranged on the rock sample, the scribed line is aligned to the scale of the number 1 on the surface of the rock sample fixer 15, a test piece locking handle is inserted, and the test piece locking handle is rotated until the rock sample is clamped by the movable clamping jaws;
s4: lifting the guide rod, installing a new drill bit, and dropping the drill bit on the surface of the rock sample and enabling the drill bit to be tightly attached to the surface of the rock sample; the edge length of the drill bit is smaller than the length size of the top end face of the rock sample;
s5: setting the times of chiseling on the controller, and starting a chiseling test after the set times are finished;
specifically, the maximum chiseling frequency which can be set by the tester at one time is 99 times; the method comprises the steps of clicking a setting storage button, starting to adjust the tens number of times of chiseling, clicking an adjusting button, adjusting the tens number of times of chiseling, clicking a setting storage button again, starting to set a units number adjusting button of the times of chiseling, adjusting the units number of the times of chiseling, clicking the setting storage button again after the setting of the times of chiseling is completed, namely, storing the set times of chiseling, wherein the set times of chiseling are generally set to be 20 times. And then, a starting button is clicked, a chiseling test is started, and after the number of chiseling times is reached, the tester is automatically stopped.
S6: after the chiseling is finished, the drill bit is lifted and clamped tightly, and the ash on the surface of the rock sample is cleaned by a brush;
s7: loosening the rock sample, adjusting the position of the rock sample to align the rock sample to different directions, fixing the rock sample again, and chiseling the rock sample;
specifically, a test piece locking handle is inserted, the test piece locking handle is rotated to loosen the rock sample fixer, the rock sample is adjusted to enable the scribed line of the rock sample to be aligned to the scale of the number 2, and the test piece locking handle is rotated until the rock sample is clamped by the fixer;
s8: and repeating the steps S6 and S7 until the scale of the rock sample reaches the scale of the 24 number, finishing the impact rock drilling process and setting the number of times of chiseling to be 480.
S9: the diameter of the chisel hole and the depth of the chisel hole are measured by a graduated scale, and the breaking specific work and the dull grinding width of the rock are calculated.
Specifically, the diameter of the chisel hole can be measured by a vernier caliper, and the depth of the chisel hole can be measured by a depth vernier caliper.
The specific work of chipping, i.e. the work consumed to chip a unit volume of rock, is now expressed as a in units of J/cm3(ii) a The total impact energy of the rock to be crushed is A in J, the volume of the rock to be crushed is V in cm3。
Let the mass of the weight be m1The total mass of the drill bit and the drill bit mounting part is m2The bit and bit-mounting part acting on the rock sample with the work
Figure BDA0002471858470000091
From the law of conservation of energy
Figure BDA0002471858470000092
The total impact energy A for rock drilling is
Figure BDA0002471858470000093
The specific work of chiseling a is
Figure BDA0002471858470000094
In the formula, a- -chiseling specific work in J/cm3；
A- - - -total impact work, unit J;
v- -volume of broken rock in cm3；
n- - -the number of impact rock drills of the heavy hammer is 480;
m1-the mass of the weight in kg;
m2-bit mounting part and bit mass in kg;
h- - -the free falling height of the heavy hammer, and the unit is m;
d- -the diameter of the chisel hole in mm;
h- -the drilling depth, in mm;
in the present invention, the height h of the free drop hammer, i.e., the height at which the weight freely drops from the drop-out member to the surface of the bit attachment part, is 1 m; mass m of weight14Kg, bit mounting part and bit mass m29.55 Kg; and calculating the rock breaking ratio work according to the measured hole drilling diameter and the hole drilling depth.
Furthermore, after the heavy hammer impacts the rock drill for 480 times, the blunting widths of the drill bit, which are 4mm inward from the two ends of the bit edge, are measured, and the average value of the two blunting widths is the blunting width b of the drill bit. The width b of the dull edge is measured by a reading microscope and a special fixture.
Example two:
as shown in fig. 2 to 11, the difference between the rock-drilling specific work tester in the second embodiment and the rock-drilling specific work tester in the first embodiment is that a rock sample cylinder 158 is further disposed on the rock sample holder 15, the height of the rock sample cylinder 158 is greater than the inner height of the rock sample holder 15, the rock sample cylinder 158 is placed in the center of the chuck body 151, the three movable claws 152 fix the rock sample cylinder 158, and the rock sample cylinder 158 is a steel cylinder. When the rock sample needing chiseling is not a regular rock sample or the rock sample is loose and has mud, the rock sample is loaded into the rock sample cylinder 158, cement mortar is used for fixing the rock sample in the rock sample cylinder 158, and the test can be carried out when the cement mortar reaches enough strength.
The test method of the rock breaking specific power tester in the second embodiment is different from the test method of the rock breaking specific power tester in the first embodiment only in that the sample is prepared in step S1, and the rest steps are the same.
The specific operation of step S1 is: and (3) fixing the rock sample in a rock sample cylinder by cement mortar, wherein the rock sample needs to be fixed in the middle in the rock sample cylinder, the axis of the rock sample needs to be vertical, and after the cement mortar reaches enough strength, sample preparation is finished, so that the subsequent test steps can be carried out.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. Rock drilling specific work tester, its characterized in that: the device comprises a controller (1) and a host, wherein the controller (1) is electrically connected with the host;
the host comprises an operation box (2) and a fixed base (3); the operation box (2) is positioned above the fixed base (3); a power lifting device, a rock sample fixing device, a guide rod (4) and a drill bit (5) are arranged in the operation box (2);
the bottom of the operation box (2) is provided with the rock sample fixing device, the center of the rock sample fixing device is vertically provided with a guide rod (4) upwards, and the bottom of the guide rod (4) is connected with a drill bit (5) through a drill bit mounting part (6); the guide rod (4) is sleeved with a heavy hammer (7); the top of the guide rod (4) is provided with a fixing box (8) for fixing the direction of the guide rod (4);
the power lifting device comprises a motor, a driving chain wheel (9) and a driven chain wheel (10), the driving chain wheel (9) and the driven chain wheel (10) are connected through a chain (11), a lifting block (12) is fixedly connected to the chain (11), and one side of the chain (11) is located right behind the guide rod (4);
a hammer removing device (13) is fixed on the guide rod (4) close to the top, and the height of the hammer removing device (13) is the same as that of the driven wheel (10); a counter is mounted on the inner side wall of the operating box (2), and the counter is positioned behind the hammer remover (13);
the top of the rear side of the heavy hammer (7) is provided with a protruding block (71), and the lifting block (12) can lift the protruding block (71) to drive the heavy hammer (7) to ascend.
2. The rock breaking specific work tester of claim 1, wherein: the rock sample fixing device comprises a rock sample fixer (15), the rock sample fixer (15) comprises a chuck body (151) and three movable jaws (152), a large bevel gear (153) is arranged in the chuck body (151), spiral grooves (154) are formed in the back of the large bevel gear (153), an arc strip (155) meshed with the spiral grooves (154) is arranged at the bottom of each movable jaw (152), a locking handle socket (156) is arranged on the side surface of the chuck body (151), a small bevel gear (157) is arranged in the locking handle socket (156), and the small bevel gear (157) is meshed with the large bevel gear (153); the rock sample fixing device also comprises a test piece locking handle (16) matched with the bevel pinion (157).
3. The rock breaking specific work tester of claim 2, wherein: the rock sample fixing device further comprises a rock sample barrel (158), and the height of the rock sample barrel (158) is greater than the inner height of the rock sample fixer (15); the rock sample cylinder (158) can be placed in the center of the chuck body (151), and the movable claws (152) fix the rock sample cylinder (158).
4. A rock drilling specific work tester as claimed in claim 3, wherein: the rock sample cylinder (158) is a steel barrel.
5. A rock drilling specific work tester as claimed in claim 2 or 3, wherein: scale markings (159) are uniformly arranged on the chuck body (151), the number of the scale markings (159) is 24, and an included angle between every two adjacent scale markings (159) is 15 degrees.
6. The rock breaking specific work tester of claim 1, wherein: the upper part of the guide rod (4) is of a rectangular column structure, and the joint of the lower part of the guide rod (4) and the drill bit mounting part (6) is of a cylindrical structure.
7. The rock breaking specific work tester of claim 1, wherein: the upper part of the drill bit mounting part (6) is of a hollow structure, the surface of the hollow structure is provided with internal threads, the bottom of the guide rod (4) is provided with external threads, and the top of the drill bit mounting part (6) is in threaded connection with the bottom of the guide rod (4).
8. The rock breaking specific work tester of claim 1, wherein: the drill bit mounting component (6) is sleeved with a guide rod fixing plate (17), the center of the guide rod fixing plate (17) is provided with an opening, the drill bit mounting component (6) penetrates through the opening, and the drill bit mounting component (6) can move up and down in the opening.
9. A rock drilling specific work tester as claimed in claim 8, wherein: the lower part of the guide rod fixing plate (17) is provided with a host bottom plate (18), the host bottom plate (18) is of a U-shaped structure, the host bottom plate (18) is fixedly connected with the operation box (2), and the host bottom plate (18) is detachably connected with the guide rod fixing plate (15).
10. The testing method of the rock breaking specific power tester as claimed in claim 1, comprising the steps of:
s1: preparing a sample;
s2: connecting a controller and a host machine, and a controller power supply, debugging the rock drilling specific power tester, and checking and screwing screws of all parts of the tester to process a normal state;
s3: placing the prepared rock sample on a rock sample fixing device and fixing;
s4: lifting the guide rod, installing a new drill bit, and dropping the drill bit on the surface of the rock sample and enabling the drill bit to be tightly attached to the surface of the rock sample;
s5: setting the times of chiseling on the controller, starting a test and finishing the chiseling with the set times;
s6: after the chiseling is finished, the drill bit is lifted and clamped tightly, and the ash on the surface of the rock sample is cleaned by a brush;
s7: loosening the rock sample, adjusting the position of the rock sample to align the rock sample to different directions, fixing the rock sample again, and chiseling the rock sample;
s8: repeating the steps S6 and S7 until the angle of the rock sample fixing device is adjusted to 360 degrees, and ending the impact rock drilling process;
s9: the diameter of the chisel hole and the depth of the chisel hole are measured by a graduated scale, and the breaking specific work and the dull grinding width of the rock are calculated.
CN202010350761.5A 2020-04-28 2020-04-28 Rock drilling specific work tester and test method thereof Pending CN111426583A (en)

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Application Number Priority Date Filing Date Title
CN202010350761.5A CN111426583A (en) 2020-04-28 2020-04-28 Rock drilling specific work tester and test method thereof

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111929181A (en) * 2020-07-24 2020-11-13 中煤科工集团西安研究院有限公司 Impact rock breaking mechanism test device
CN114646425A (en) * 2022-03-25 2022-06-21 中国测试技术研究院机械研究所 Rock drilling specific work instrument calibration device and use method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111929181A (en) * 2020-07-24 2020-11-13 中煤科工集团西安研究院有限公司 Impact rock breaking mechanism test device
CN111929181B (en) * 2020-07-24 2023-04-28 中煤科工集团西安研究院有限公司 Impact rock crushing mechanism test device
CN114646425A (en) * 2022-03-25 2022-06-21 中国测试技术研究院机械研究所 Rock drilling specific work instrument calibration device and use method
CN114646425B (en) * 2022-03-25 2024-03-12 中国测试技术研究院机械研究所 Rock crushing specific power instrument calibration device and use method

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