CN105136583A - Briquette coal manufacturing process pore fracture evolution testing device - Google Patents
Briquette coal manufacturing process pore fracture evolution testing device Download PDFInfo
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- CN105136583A CN105136583A CN201510652883.9A CN201510652883A CN105136583A CN 105136583 A CN105136583 A CN 105136583A CN 201510652883 A CN201510652883 A CN 201510652883A CN 105136583 A CN105136583 A CN 105136583A
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Abstract
The invention belongs to the technical field of laboratory test piece manufacturing equipment and particularly relates to a briquette coal manufacturing process pore fracture evolution testing device. The briquette coal manufacturing process pore fracture evolution testing device comprises a pressure control system, a briquette coal forming system and a displacement stress sound emission monitoring system. The pressure control system comprises a hydraulic cylinder, a high pressure oil pipe, a hydraulic source and a controller. The briquette coal forming system comprises a pressing rod, a disassembling and assembling handle and a briquette coal pressing cavity. The displacement stress emission monitoring system comprises a displacement sensor, a pressure sensor, a sound emission probe, a data collection instrument and a computer. Due to the reasonable design of the briquette coal manufacturing process pore fracture evolution testing device, collection and analysis of data such as pressure, displacement, sound emission energy in the briquette coal manufacturing and fracture pore evolution process can be achieved through the complete structure, the test process is greatly simplified, and the test efficiency is improved.
Description
Technical field
The invention belongs to laboratory test specimen making apparatus technical field, particularly a kind of moulded coal manufacturing process hole crack evolution test unit.
Background technology
Coal is a kind of very important resource, accounts for about 65% of China's energy consumption structure, and coal-seam gas is the accompaniment in coal forming process, is also a kind of important resource.Understand the mechanical characteristic of coal, adsorption-desorption characteristics and seepage characteristic by experiment and have important directive function for the exploitation of coal and coal bed gas resource.Coal test specimen is the main carriers understanding coal character, and the test specimen (as φ 50mm × 100mm) raw coal being processed into required size is the early-stage preparations of experiment.But containing a large amount of beddings, joint and crack in coal, the more coal of individual developmental is difficult to the test specimen being processed into required size.In order to solve this difficult problem, by raw coal being pulverized the characteristic being processed into the method approximate measure coal of moulded coal.In the forming process of moulded coal, the hole between pulverized coal particle changes gradually along with the increase of pressure, and the size of these crack holes and how much directly affect mechanical characteristic, adsorption-desorption characteristics and the seepage characteristic of moulded coal.Therefore probe into moulded coal manufacturing process hole crack to develop, for mechanical characteristic between analysis moulded coal/raw coal, adsorption-desorption characteristics and seepage characteristic difference are of great significance.
Summary of the invention
For prior art Problems existing, the invention provides a kind of moulded coal manufacturing process hole crack evolution test unit, object is designed by the Rational structure of this device, analyzes crack, moulded coal manufacturing process mesoporosity evolutionary process.
Realize the moulded coal manufacturing process hole crack evolution test unit of the object of the invention, comprise control pressurer system, briquette molding system and displacement stress acoustic emission monitoring system;
Described control pressurer system comprises hydraulic cylinder, high-pressure oil pipe and hydraulic power source and controller; Described briquette molding system comprises depression bar, handling handle and moulded coal compression chamber; Described displacement stress launch monitor system comprises displacement transducer, pressure transducer, acoustic emission probe, data collecting instrument and computing machine;
Wherein, described hydraulic power source and controller are by high-pressure oil pipe connecting fluid cylinder pressure, and hydraulic cylinder extends can descend moulded rod, and the diameter of depression bar mates with the indoor footpath of the moulded coal of moulded coal compression chamber;
The moulded coal room of described moulded coal compression chamber is hollow cylindrical structure, and hollow cylinder is combined by 3 1/3 hollow cylinders, is provided with a handling hole in the middle part of the outside surface of each 1/3 hollow cylinder; The bottom of moulded coal room is provided with right cylinder pad and by lower nut compressing pad, top is provided with upper cap nut, middle part is provided with handling fixed mount, upper cap nut and lower nut respectively there is the handling hole that 2 symmetrical, handling fixed mount have the handling hole corresponding with the handling hole position of 1/3 hollow cylinder, handling hole has screw thread, is threaded engagement between handling hole and handling handle;
Described moulded coal room is provided with acoustic emission probe, acoustic emission probe is connected with the input end of data collecting instrument, the input end of data collecting instrument is also connected with displacement transducer respectively with pressure transducer, pressure transducer is wherein arranged on hydraulic jack, displacement transducer is arranged on depression bar, the output terminal of data collecting instrument is connected with computing machine, and computing machine is also connected with hydraulic power source and controller.
Wherein, described high-pressure oil pipe is provided with oil inlet valve and fuel-displaced valve.
Described depression bar is made up of alloy tool steel, and there is vent port at depression bar center, and aperture, vent port top is greater than aperture, bottom.
Compared with prior art, feature of the present invention and beneficial effect are:
Moulded coal room in the present invention is hollow cylinder, moulded coal room is combined by 3 1/3 hollow cylinders, moulded coal room there are three handling holes, handling hole and handling fixed mount, handling handle with the use of, moulded coal indoor are provided with right cylinder pad, coal dust is loaded moulded coal room, certain power is applied to depression bar coal dust is pressed into moulded coal, moulded coal room adopts 1/3 hollow cylinder composite design to be the stressing conditions of moulded coal when considering the moulded coal demoulding, ensure the easy demoulding, moulded coal is made to be not easy to damage, in moulded coal knockout course, when unloading lower end nut, moulded coal lower surface loses constraint and produces distortion, right cylinder pad is extruded, and moulded coal is not extruded, protection moulded coal is not damaged.
The effect of the vent port in the present invention on depression bar is the air of discharging moulded coal indoor in moulded coal forming process.
Stress control in the present invention can realize permanent displacement, constant load, permanent rate of displacement, constant loading rate control to load, and adopt electro-hydraulic servo technology of closed loop, computing machine controls.
Hydraulic jack in the present invention is provided with pressure transducer, gathers pressure data, by computer recording and by hydraulic pump and controller feedback regulation pressure size.
The parameters such as acoustic emission energy when displacement stress acoustic emission monitoring system of the present invention can monitor decrement in moulded coal forming process, compression speed, pressure size, hole crack develop.
Moulded coal room of the present invention is provided with acoustic emission probe, the energy that in moulded coal manufacturing process, the crack closing of pores discharges can be gathered, the evolutionary process in crack in reflection moulded coal manufacturing process.
Depression bar of the present invention is provided with displacement transducer, the size of moulded coal in moulded coal manufacturing process can be gathered, the data such as compression speed, by computer recording and by hydraulic pump and control system feedback regulation test specimen decrement thereof and compression speed.
The present invention, by the appropriate design of device, just can be realized the collection analysis of the data such as pressure, displacement, energy in moulded coal making and crack hole evolutionary process, enormously simplify process of the test, improve test efficiency by the structure of complete set.
Accompanying drawing explanation
Fig. 1 is moulded coal manufacturing process hole crack evolution test unit structural representation of the present invention;
Fig. 2 is the cross-sectional view of 1/3 hollow cylinder in Fig. 1;
Fig. 3 be handling hole screw thread in Fig. 1 with handling handle with the use of schematic diagram;
Wherein: 1: hydraulic cylinder; 2: high-pressure oil pipe; 3: oil inlet valve; 4: fuel-displaced valve; 5: wire, 6: hydraulic power source and controller; 7: pressure transducer; 8: computing machine, 9: data collecting instrument; 10: acoustic emission probe; 11: depression bar; 12: vent port; 13: upper cap nut; 14: handling hole; 15: moulded coal room: 16: handling fixed mount; 17: screw thread; 18: lower nut; 19: right cylinder pad; 20: displacement transducer; 21:1/3 hollow cylinder; 22: handling handle.
Embodiment
Below in conjunction with Fig. 1, Fig. 2 and Fig. 3, use-pattern of the present invention is described further.
The pressure transducer adopted in the embodiment of the present invention is MEACON board model MIK-P300 pressure unit, displacement transducer is the spring self-recoverage linear displacement transducer of MIRAN board model KTR-50mm, data collecting instrument is Stettlen board model TST5915, hydraulic controller is BOEN board model 53853, collocation computing machine and software kit use, and calibrate AE sensor is microminiature calibrate AE sensor M type (association shake formula).
As Fig. 1, moulded coal manufacturing process hole crack evolution test unit, comprises control pressurer system, briquette molding system and displacement stress acoustic emission monitoring system;
Described control pressurer system comprises hydraulic cylinder 1, high-pressure oil pipe 2 and hydraulic power source and controller 6; Described briquette molding system comprises depression bar 11, handling handle 22 and moulded coal compression chamber; Described displacement stress launch monitor system comprises displacement transducer 20, pressure transducer 7, acoustic emission probe 10, data collecting instrument 9 and computing machine 8;
Wherein, described hydraulic power source and controller 6 are by high-pressure oil pipe 2 connecting fluid cylinder pressure 1, and hydraulic oil 2 is provided with oil inlet valve 3 and fuel-displaced valve 4, and hydraulic cylinder 1 extends can descend moulded rod 11, and the diameter of depression bar 11 mates with moulded coal room 15 internal diameter of moulded coal compression chamber;
The moulded coal room 15 of described moulded coal compression chamber is hollow cylindrical structure, and hollow cylinder is combined by 3 1/3 hollow cylinders 21, is provided with a handling hole 14, as shown in Figure 2 in the middle part of the outside surface of each 1/3 hollow cylinder 21; The bottom of moulded coal room 15 is provided with right cylinder pad 19 and by lower nut 18 compress gasket, top is provided with upper cap nut 13, middle part is provided with handling fixed mount 16, upper cap nut 13 and lower nut 18 respectively there is the handling hole 14 that 2 symmetrical, handling fixed mount 16 have the handling hole 14 corresponding with handling hole 14 position of 1/3 hollow cylinder 21, handling hole 14 has screw thread, is threaded engagement between handling hole 14 and handling handle 22, as shown in Figure 3;
Described moulded coal room 15 is also provided with acoustic emission probe 10, acoustic emission probe 10 is connected with the input end of data collecting instrument 9, the input end of data collecting instrument 9 is also connected with displacement transducer 20 respectively with pressure transducer 7, pressure transducer 7 is wherein arranged on hydraulic jack 1, displacement transducer 20 is arranged on depression bar 11, the output terminal of data collecting instrument 9 is connected with computing machine 8, and computing machine 8 is also connected with hydraulic power source and controller 6.
Described depression bar 11 is made up of alloy tool steel, and there is vent port 12 at depression bar center, and aperture, vent port 12 top is greater than aperture, bottom.
Adopt above-mentioned moulded coal manufacturing process hole crack evolution test unit carry out moulded coal manufacturing process hole crack develop test step as follows:
(1) moulded coal compression chamber is assembled: 3 1/3 hollow cylinders 21 are combined into moulded coal room 15, handling fixed mount 16 is enclosed within moulded coal room 15,3 handling handles 22 are screwed on handling fixed mount 16, and make handling handle 22 inject the handling hole 14 of moulded coal room 15, and hold out against moulded coal room, right cylinder pad 19 is put into below moulded coal room 15, then coordinate handling handle 22 to tighten lower nut 18 and upper cap nut 13;
(2) crack evolution test is carried out: be placed on pressure testing machine by moulded coal compression chamber, in moulded coal compression chamber, the coal dust that quality is m is poured into after adjusting position, then depression bar 11 is put into moulded coal compression chamber, air in coal dust is discharged from vent port 12, start-up simulation machine control system, adjustment hydraulic pressure 1, pressing machine is contacted with depression bar 11, then by the zeroing of displacement data balance, primer fluid press pump and control 6, a kind of load mode is selected to load coal dust, when depression bar 11 arrives moulded coal desired height, be adjusted to permanent displacement or constant load loads a period of time, then unload, 10 are visited by acoustic emission in loading procedure, collection coal dust is pressed into the acoustic emission energy in moulded coal process one-tenth,
(3) take out moulded coal: disassemble upper and lower nut with handling handle 22, then back out the handling handle 22 on handling fixed mount 16, take off handling fixed mount 16, then take moulded coal room 15 apart, take out moulded coal;
Moulded coal manufacturing process hole crack evolution test unit also can by other supplementary meanss, and as scanning electron microscope, to different aperture degree, different loads, the moulded coal manufacturing process hole crack under different loading speed condition develops and analyzes.
Claims (3)
1. a moulded coal manufacturing process hole crack evolution test unit, is characterized in that comprising control pressurer system, briquette molding system and displacement stress acoustic emission monitoring system;
Described control pressurer system comprises hydraulic cylinder, high-pressure oil pipe and hydraulic power source and controller; Described briquette molding system comprises depression bar, handling handle and moulded coal compression chamber; Described displacement stress launch monitor system comprises displacement transducer, pressure transducer, acoustic emission probe, data collecting instrument and computing machine;
Wherein, described hydraulic power source and controller are by high-pressure oil pipe connecting fluid cylinder pressure, and hydraulic cylinder extends can descend moulded rod, and the diameter of depression bar mates with the indoor footpath of the moulded coal of moulded coal compression chamber;
The moulded coal room of described moulded coal compression chamber is hollow cylindrical structure, and hollow cylinder is combined by 3 1/3 hollow cylinders, is provided with a handling hole in the middle part of the outside surface of each 1/3 hollow cylinder; The bottom of moulded coal room is provided with right cylinder pad and by lower nut compressing pad, top is provided with upper cap nut, middle part is provided with handling fixed mount, upper cap nut and lower nut respectively there is the handling hole that 2 symmetrical, handling fixed mount have the handling hole corresponding with the handling hole position of 1/3 hollow cylinder, handling hole has screw thread, is threaded engagement between handling hole and handling handle;
Described moulded coal room is provided with acoustic emission probe, acoustic emission probe is connected with the input end of data collecting instrument, the input end of data collecting instrument is also connected with displacement transducer respectively with pressure transducer, pressure transducer is wherein arranged on hydraulic jack, displacement transducer is arranged on depression bar, the output terminal of data collecting instrument is connected with computing machine, and computing machine is also connected with hydraulic power source and controller.
2. a kind of moulded coal manufacturing process hole crack evolution test unit according to claim 1, is characterized in that described high-pressure oil pipe is provided with oil inlet valve and fuel-displaced valve.
3. a kind of moulded coal manufacturing process hole crack evolution test unit according to claim 1, it is characterized in that described depression bar is made up of alloy tool steel, there is vent port at depression bar center, and aperture, vent port top is greater than aperture, bottom.
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| CN201510652883.9A CN105136583B (en) | 2015-10-10 | 2015-10-10 | A kind of moulded coal manufacturing process hole crack evolution experimental rig |
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| CN105136583B CN105136583B (en) | 2018-10-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107462473A (en) * | 2017-07-28 | 2017-12-12 | 太原理工大学 | A kind of lower coalmass crevasse evolution device and method of varying strength water effect |
| CN109001095A (en) * | 2018-07-11 | 2018-12-14 | 西安石油大学 | Reservoir pore space Evolution Simulation experimental provision |
| CN110308052A (en) * | 2019-08-01 | 2019-10-08 | 中国矿业大学 | Hollow rock sample Radial Flow Through Porous Media experimental rig and test method based on acoustic emission |
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| CN204612993U (en) * | 2015-02-12 | 2015-09-02 | 中国矿业大学(北京) | A kind of cylinder mold |
| CN204622658U (en) * | 2015-05-05 | 2015-09-09 | 浙江大学 | A kind of hydraulic forming device for suppressing moulded coal |
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2015
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| CN2127786Y (en) * | 1992-05-26 | 1993-03-03 | 中国石油天然气总公司工程技术研究所 | Device for testing cementing strength of combined cement ring |
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| CN202599728U (en) * | 2012-05-24 | 2012-12-12 | 甘肃路桥建设集团养护科技有限责任公司 | Asphalt mixture mould used for standing wave tube device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107462473A (en) * | 2017-07-28 | 2017-12-12 | 太原理工大学 | A kind of lower coalmass crevasse evolution device and method of varying strength water effect |
| CN109001095A (en) * | 2018-07-11 | 2018-12-14 | 西安石油大学 | Reservoir pore space Evolution Simulation experimental provision |
| CN109001095B (en) * | 2018-07-11 | 2020-10-09 | 西安石油大学 | Reservoir pore evolution simulation experiment device |
| CN110308052A (en) * | 2019-08-01 | 2019-10-08 | 中国矿业大学 | Hollow rock sample Radial Flow Through Porous Media experimental rig and test method based on acoustic emission |
| CN110308052B (en) * | 2019-08-01 | 2021-07-20 | 中国矿业大学 | Hollow rock sample radial seepage test device and test method based on acoustic emission technology |
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| CN105136583B (en) | 2018-10-30 |
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