CN1034693C - Test equipment of dynamic pulverization property of particulate mineral rock - Google Patents
Test equipment of dynamic pulverization property of particulate mineral rock Download PDFInfo
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- CN1034693C CN1034693C CN 91111629 CN91111629A CN1034693C CN 1034693 C CN1034693 C CN 1034693C CN 91111629 CN91111629 CN 91111629 CN 91111629 A CN91111629 A CN 91111629A CN 1034693 C CN1034693 C CN 1034693C
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- impact bar
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- rock
- ore deposit
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Abstract
The present invention relates to a device for testing the dynamic pulverization performance of ore rock of a loose body, which is a device for testing the dynamic pulverization performance of ore rock of a loose body by gunpowder explosion as driving force. The device can test the stress variation and the displacement variation of ore rock of a loose body in the whole process of dynamic pulverization, and simultaneously, the final speed of an impact bar can be tested. The device comprises a base, a charging cylinder, a rigid frame, the impact bar, a cartridge charging chamber, a launching cylinder, an initiation system and a test system. The device has the advantages of simple structure, wide adjustable range of final impact speed, convenient operation, and good pulse reproducibility of a loading pulse as driving force.
Description
The present invention be a kind of be the device of the mensuration dynamic pulverization property of particulate mineral rock of driving force with the gunpowder explosion, it belongs to the stress transition mechanical process of discrete material and the determinator of crushing effect, and it includes support, coupled barrel, rigid frame and impact bar etc.
In the prior art, a kind of impact grinding intensity of whole rock sample and segmentation Huo Bujinsheng depression bar (as Fig. 6) of crushing work measured arranged, its prototype was proposed by Hopkinson.B in 1914, the essence of its assay method is: whole rock sample 30 is clipped between two sections steel poles (being elasticity input bar 29 and elasticity take-off lever 31), after driving stem 28 impacts, by measuring the incident wave of elasticity input bar 29, the transmitted wave of reflection wave and elasticity take-off lever 31 can calculate the impact grinding intensity and the crushing work of rock sample, but it can not be used to measure the dynamic smashing capability of prose style free from parallelism ore deposit rock.
Also have a kind of tube of smashing to pieces can measure the degree of crushing of prose style free from parallelism ore deposit rock sample and compare merit, it is proposed in 1940 by CblckoB.K. И, it is by support, barrel, rigid frame and impact bar four parts constitute, barrel places on the support and by gland and is connected with it through bolt, rigid frame is paid through spiral by be rigidly connected plate and framework and is connected and composed, it places on the support in the barrel outside, during mensuration, the prose style free from parallelism ore deposit rock sample of splendid attire specified altitude in barrel, again impact bar is promoted to level altitude, freely fall several times, calculate degree of crushing and compare merit by the effect after the fragmentation then, but a tube mensuration prose style free from parallelism ore deposit rock sample is smashed in utilization to pieces certain drawback is arranged, it can not react the transient information of stress one strain of material inside in crushing process of prose style free from parallelism ore deposit rock sample, in addition, because the impact bar hoisting depth is constant, its impact end speed is also constant, yet the dynamic crushing process of prose style free from parallelism ore deposit rock is a stress transient process under the impact load effect, different impact end speeds is vital to the influence of dynamic pulverization property of particulate mineral rock, so adopt constant end speed can influence the dynamic smashing capability of research prose style free from parallelism ore deposit rock.
The proving installation that the purpose of this invention is to provide a kind of dynamic pulverization property of particulate mineral rock, it can react the end speed of impact bar in the dynamic crushing process of prose style free from parallelism ore deposit rock under the impact load effect, the stress transient process of displacement in the rock bed of material of prose style free from parallelism ore deposit and prose style free from parallelism ore deposit rock.
The object of the present invention is achieved like this: it is made up of support, barrel, rigid frame, impact bar, charging room, launching tube, initiation system and test macro eight parts, and wherein barrel places on the support and by gland and is connected with it through bolt; Rigid frame places on the support, occupy the barrel outside, and it is paid through spiral by be rigidly connected plate and framework and connects and composes, and all there is screw thread the upper end of framework, lower end, to adjust the position of impact bar, guarantees to cut off system capacity and originate when impact bar contact bed of material moment; Device of the present invention is to be driving force with the gunpowder explosion, and its initiation system is fixed tightly on the rigid frame by jackscrew, is made up of igniter head, lead and initiator; Charging room is located in the depression garden groove of impact bar upper end, the double-basis propellant that is equipped with in it is after initiation system is detonated, gunpowder generates high temperature and high pressure gas through chemical reaction, in the emission cavity that forms between charging room, launching tube and impact bar, high temperature and high pressure gas promotes impact bar and does stroke accelerated motion; The impact bar upper-end outer surface is provided with two ring grooves, two lock washers are distributed in wherein, cooperate with the launching tube inside surface, suspention impact bar when static state, in that dynamically launching tube is relative with impact bar when sliding, the increase force of sliding friction is after the emission cavity internal pressure reaches maximum value, also can increase the time that high temperature and high pressure gas and impact bar carry out energy exchange, prevent gas in the emission cavity in impact bar accelerated motion process prematurely to external leakage; Launching tube and rigidity web joint fasten as one, and there is 1 through hole its lower end, and there is a ring groove that connects with through hole on surface, garden in it, form the path of high temperature and high pressure gas in the emptying emission cavity, cut off the energy of this device of input; Degree of the testing the speed light barrier and the location of test macro moves light barrier and is connected with the photoelectric cell trigger-type with photodiode by the irradiation of two place's sources of parallel light respectively, photodiode links to each other with the transient waveform memory by two amplifiers respectively again with photoelectric cell, the strain gauge of test macro links to each other with the transient waveform reservoir by charge amplifier, the transient waveform reservoir is connected with microcomputer, degree of testing the speed light barrier and location move light barrier and impact bar is synchronous, if 1/3～1/2 place apart from the bottom thereon, strain gauge is embedded in the prose style free from parallelism ore deposit rock bed of material in the barrel.
Proving installation of the present invention can react the overall process of prose style free from parallelism ore deposit rock in the stress transition of the end speed of the dynamic crushing process impact bar under the impact load effect, displacement in the rock bed of material of prose style free from parallelism ore deposit and prose style free from parallelism ore deposit rock, as Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12 are one time of displacement and the stress time curves of the dynamic crushing process of three kinds of ore deposit rocks, advantages such as this device also has simple in structure, and impact bar end speed adjustable extent is wide.
Be described in detail content of the present invention below in conjunction with accompanying drawing
Fig. 1 is the general structure synoptic diagram of test equipment of dynamic pulverization property of particulate mineral rock.
Fig. 2 is the part-structure synoptic diagram of impact bar.
Fig. 3 is the part-structure synoptic diagram of launching tube.
Fig. 4 is a barrel part-structure synoptic diagram.
Fig. 5 is the wiring diagram of test macro.
Fig. 6 is the synoptic diagram of segmentation Huo Bujinsheng depression bar.
Fig. 7 is southern fragrant iron ore S-t curve.
Fig. 8 is a grouan S-t curve.
Fig. 9 is a sandstone S-t curve.
Figure 10 is southern fragrant iron ore F-t curve.
Figure 11 is a grouan F-t curve.
Figure 12 is a sandstone F-t curve.
S-displacement t-time F-stress wherein
As shown in Figure 1, device of the present invention is made up of support, barrel, rigid frame, impact bar, charging room, launching tube, initiation system and test macro eight parts, and wherein barrel 9 places on the support 10 and by gland 12 and is connected with it through bolt 13; Rigid frame places on the support 10, occupy barrel 9 outsides, it is to be paid through spiral by be rigidly connected plate 4 and framework 7 to connect and compose, all there is screw thread framework 7 upper ends, lower end, to adjust the position of impact bar 5, guarantee the energy source when impact bar 5 contact prose style free from parallelism ore deposit rock 8 bed of material instantaneous trip systems; Device of the present invention is to be driving force with the gunpowder explosion, and its initiation system 1 is fixed tightly on the rigid frame by jackscrew 2, and it is made up of igniter head, lead and initiator; Charging room 3 is located in the depression garden groove of impact bar 5 upper ends, the double-basis propellant is housed in it, after initiation system 1 is detonated, gunpowder generates high temperature and high pressure gas through chemical reaction, in the emission cavity 32 that between charging room 3, launching tube 6 and impact bar 5, forms, high temperature and high pressure gas promotes impact bar 5 and does stroke accelerated motion, and gunpowder through the theoretical energy that chemical reaction discharges is:
In the formula,
Can (unit: joule/kilogram) in-gunpowder initial;
-gunpowder standard heat of formation (unit: joule/kilogram);
The weight percent content of gunpowder i kind component;
The ratio of-gunpowder i kind component generates heat (unit: joule/kilogram); Impact bar 5 upper-end outer surface are provided with two ring grooves, two lock washers 14 are distributed in wherein, cooperate with launching tube 6 inside surfaces, suspention impact bar 5 when static state, when dynamically launching tube 6 is with impact bar 5 relative slips, increase force of sliding friction, the stroke time of retardation impact bar 5, in addition according to the interior ballistics principle, gas pressure change trend in the emission cavity 32 have the moment process of boosting, after emission cavity 32 internal pressures reach maximum value, the lock washer structure of impact bar 5 also can increase the time that high temperature and high pressure gas and impact bar 5 carry out energy exchange, prevent the gas outwards Vent leakage prematurely in impact bar 5 accelerated motion processes in the emission cavity 32, the theoretical energy of the closed system of apparatus of the present invention input:
In the formula, (unit: meter per second), (unit: kilogram), φ-impact bar absorbs various forms of energy conversion factors to the quality of m-impact bar to the end speed that the V-impact bar impacts; The gas law constant that the reaction of R-gunpowder generates; ψ-powder burning coefficient; K-powder gases adiabatic exponent; The T1-gunpowder generates the initial temperature of gas, and the T-gunpowder generates the temperature after the gas acting; ω-gunpowder quality (unit: kilogram); Formula can be estimated the relation of powder volume and impact bar end speed thus; Launching tube 6 is to fasten as one with rigidity web joint 4, there are 4 through holes 15 its lower end, there is a ring groove 16 that connects with through hole on surface, garden in it, form high temperature and high pressure gas path in the emptying emission cavity, thereby cut off the energy of input apparatus of the present invention, adjust the screw thread of framework 7 upper ends or lower end, the position that can adjust impact bar 5 guarantees to contact when the lower surface of impact bar 5 moment on rock 8 bed of material surfaces, prose style free from parallelism ore deposit, then being positioned at lock washer 14 on the impact bar 5 arrives at or is lower than ring groove 16 positions, make the interior high temperature and high pressure gas of emission cavity along the surface, outer garden of impact bar 5 and the gap between the launching tube 6, discharge rapidly through ring groove 16 and through hole 15 again, cut off the energy of input pilot system; Degree of the testing the speed light barrier 17 and the location of apparatus of the present invention test macro move light barrier 22, are synchronized with the movement with impact bar 5, are located on the impact bar 1/3～1/2 place apart from the bottom; Strain gauge 11 is located in barrel 9 interior prose style free from parallelism ore deposit rock 8 bed of materials, degree of testing the speed light barrier 17 and location move light barrier 22 and are connected with photoelectric cell 24 trigger-types with photodiode 19 with 23 irradiation by source of parallel light 18 respectively, and photodiode 19 links to each other with transient waveform memory 21 by amplifier 25 respectively again with photoelectric cell 24; Strain gauge 11 also links to each other with transient waveform memory 21 by charge amplifier 26, transient waveform memory 26 links to each other with microcomputer 27, when impact bar 5 is done stroke movement, degree of testing the speed frequency modulated light plate 17 on the impact bar 5 blocks the directional light of source of parallel light 18 irradiations, trigger two photodiodes 19 that certain distance is arranged in succession, its voltage signal enters in the transient waveform reservoir 21 by amplifier 20, thereby the velocity information of storage impact bar, when impact bar 5 high speed impact prose style free from parallelism ore deposit rock 8 bed of materials surface moment, fixing location moves light barrier 22 and covers photoelectric cell 24 fully on it, making the photoelectric cell light-receiving area is zero, the absolute value of voltage minimum of circuit output, in the STRESS VARIATION process, variation along with impact bar 5 displacement in the rock bed of material of prose style free from parallelism ore deposit, photronic light-receiving area also changes thereupon, the voltage signal of output also changes thereupon, thereby reflect at prose style free from parallelism ore deposit rock impact bar 5 whole displacement informations in the rock bed of material of prose style free from parallelism ore deposit in dynamic crushing process, these information are input in the transient waveform memory 21 equally by amplifier 25, stress information is to pass to charge amplifier 26 by the strain gauge 11 that is located at rock 8 bed of material inside, prose style free from parallelism ore deposit, and then be input in the same transient waveform memory 21, behind the power connection, transient waveform memory 21 is in the sampling waiting status, it is to adopt the internal trigger mode of staying the address of giving, rely on load signal itself to come trigger scanning work, the transient waveform memory is by showing with microcomputer is online, print or storage impact bar end speed, stress-time and displacement-time curve information.
In the technology of the present invention solution, impact bar 5 diameters are the 15-80 millimeter, and length is the 300-3000 millimeter.
In the technology of the present invention solution, prose style free from parallelism ore deposit rock 8 granularities are less than 20 millimeters, and prose style free from parallelism ore deposit rock 8 bed depths are the 40-60 millimeter.
Claims (1)
1, a kind of test equipment of dynamic pulverization property of particulate mineral rock, it comprises:
(1) support (10),
(2) place support (10) go up and by gland (12) through the connected barrel of bolt (13) (9),
(3) place support (10) to go up the rigid frame in barrel (9) outside,
(3.1) it is paid through spiral by plate that is rigidly connected (4) and framework (7) and connects and composes,
(4) impact bar (5) is characterized in that:
(3.1.1) all there is screw thread framework (7) upper end, lower end,
(4.1) its upper-end outer surface is provided with two bar-shaped troughs,
(4.1.1) two lock washers (14) are distributed in the ring groove, cooperate with launching tube (6) inside surface,
(5) be located at charging room (3) in the depression garden groove of impact bar (5) upper end,
(6) be the launching tube of one (6) with the plate that is rigidly connected is firm,
(6.1) its lower end is provided with 4 through holes (15),
(6.2) there is a ring groove (16) that connects with through hole on surface, garden in it,
(7) be fixed tightly in initiation system (1) on the rigid frame by jackscrew,
(8) test macro,
(8.1) its degree of testing the speed light barrier (17) and location move light barrier (22) respectively by two place's sources of parallel light (18), (23) irradiation is connected with photoelectric cell (24) trigger-type with photodiode (19), photodiode (19) and photoelectric cell (24) are again respectively by two amplifiers (20), (25) link to each other with transient waveform memory (21), its strain gauge (11) also links to each other with transient waveform reservoir (21) by charge amplifier (26), transient waveform reservoir (21) is connected with microcomputer (27)
(8.1.1) establish thereon apart from bottom 1/3-1/2 place with synchronous degree of the testing the speed light barrier (17) of impact bar (5),
(8.1.2) move light barrier (22) and establish thereon apart from bottom 1/3-1/2 place with the synchronous location of impact bar (5),
(8.1.3) strain gauge (11) is embedded in barrel (9) interior prose style free from parallelism ore deposit rock (8) bed of material.
Above-mentioned impact bar (5) diameter is the 15-80 millimeter, and length is the 300-3000 millimeter, and prose style free from parallelism ore deposit rock (8) granularity is less than 20 millimeters, and prose style free from parallelism ore deposit rock (8) bed depth is the 40-60 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111629 CN1034693C (en) | 1991-12-25 | 1991-12-25 | Test equipment of dynamic pulverization property of particulate mineral rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111629 CN1034693C (en) | 1991-12-25 | 1991-12-25 | Test equipment of dynamic pulverization property of particulate mineral rock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1073765A CN1073765A (en) | 1993-06-30 |
| CN1034693C true CN1034693C (en) | 1997-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91111629 Expired - Fee Related CN1034693C (en) | 1991-12-25 | 1991-12-25 | Test equipment of dynamic pulverization property of particulate mineral rock |
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| CN (1) | CN1034693C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095639A (en) * | 2010-12-08 | 2011-06-15 | 同济大学 | Blast resistance test device and using method thereof |
| CN104764654A (en) * | 2015-03-05 | 2015-07-08 | 北京理工大学 | Safety protection device for high speed compression of energetic materials |
| CN105203418B (en) * | 2015-10-15 | 2017-08-29 | 郑州轻工业学院 | pneumatic grain hardness detector |
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1991
- 1991-12-25 CN CN 91111629 patent/CN1034693C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1073765A (en) | 1993-06-30 |
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