CN111912871A - Microwave-assisted rock breaking irradiation test device and test method thereof - Google Patents
Microwave-assisted rock breaking irradiation test device and test method thereof Download PDFInfo
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- CN111912871A CN111912871A CN202010530557.1A CN202010530557A CN111912871A CN 111912871 A CN111912871 A CN 111912871A CN 202010530557 A CN202010530557 A CN 202010530557A CN 111912871 A CN111912871 A CN 111912871A
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- 238000012360 testing method Methods 0.000 title claims abstract description 126
- 239000011435 rock Substances 0.000 title claims abstract description 41
- 238000010998 test method Methods 0.000 title claims description 10
- 238000001816 cooling Methods 0.000 claims abstract description 39
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 238000012544 monitoring process Methods 0.000 claims description 16
- 239000000523 sample Substances 0.000 claims description 13
- 238000009826 distribution Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 239000007921 spray Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
Abstract
The invention discloses a microwave-assisted rock breaking irradiation test device which comprises a microwave irradiation system and a test piece supporting frame, wherein the microwave irradiation system is connected with the test piece supporting frame through a track, the microwave irradiation system is respectively connected with a video image acquisition system and an infrared temperature measurement system, and the test piece supporting frame is connected with a test piece cooling system; the problem that the existing irradiation device cannot meet the requirements of a microwave irradiation test is solved; the device has the advantages of reasonable structure, simple operation and easy implementation, and can be widely used for microwave-assisted rock breaking irradiation tests.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering testing, relates to a microwave-assisted rock breaking irradiation test device, and further relates to an irradiation test method using the irradiation test device.
Background
The microwave-assisted rock breaking is characterized in that the rock is irradiated by microwaves in advance in a certain mode and degree, cracking phenomena such as temperature change, stress increase, thermal cracking and the like occur in the irradiated rock, the hardness and the strength of the rock are remarkably reduced, the drillability is greatly improved, and the rock is cut by a mechanical cutter to complete excavation. The microwave-assisted rock breaking technology can obviously reduce mechanical wear, obviously reduce rock excavation construction cost and improve mechanical excavation speed and efficiency. Besides the characteristics of the rock, external factors such as microwave irradiation intensity, irradiation duration, irradiation interval and cooling mode all have significant influence on the microwave irradiation effect, and deep research needs to be carried out. However, at present, most of the test equipment for microwave-assisted rock breaking is carried out by adopting a household microwave oven or industrial microwave, so that the limitation is large, the test conditions required by the microwave-assisted rock breaking technology are difficult to meet, the parameter setting accuracy is poor, real-time monitoring cannot be carried out, the irradiation mode and the like cannot meet the requirements of researching test schemes, and the research result has low reference. Therefore, a microwave-assisted rock breaking irradiation test device is needed to meet test requirements and provide a basic experimental means for development of a microwave-assisted rock breaking technology.
Disclosure of Invention
The invention aims to provide a microwave-assisted rock breaking irradiation test device, which solves the problem that the existing irradiation device cannot meet the requirements of microwave irradiation tests.
The invention also aims to provide a test method of the microwave-assisted rock breaking irradiation test device.
The first technical scheme adopted by the invention is that the microwave-assisted rock breaking irradiation test device comprises a microwave irradiation system and a test piece supporting frame, wherein the microwave irradiation system is connected with the test piece supporting frame through a track, the microwave irradiation system is respectively connected with a video image acquisition system and an infrared temperature measurement system, and the test piece supporting frame is connected with a test piece cooling system.
The first technical scheme of the invention is also characterized in that:
the microwave irradiation system comprises a microwave irradiation system frame connected with the track, a wave feed port arrangement plate is arranged on the microwave irradiation system frame and on the surface opposite to the test piece supporting frame, a plurality of wave feed port slideways are arranged on the wave feed port arrangement plate, a plurality of microwave units are arranged on each wave feed port slideway, and the position of the wave feed port on the slideways is adjustable.
Each microwave unit comprises a microwave generator, the microwave generator is connected with one end of a waveguide tube, the other end of the waveguide tube is connected with a wave feed port, and the wave feed port is arranged on a wave feed port slideway.
The wave feed port arrangement plate is circular, a plurality of wave feed port slide ways are arranged along the radial direction of the wave feed port arrangement plate, and included angles between adjacent wave feed port slide ways are equal.
The wave feed port arrangement plate is rectangular, a plurality of wave feed port slideways are arranged between two opposite sides of the wave feed port arrangement plate, and the distances between the adjacent mutually parallel wave feed port slideways are equal.
The video image acquisition system comprises a video monitoring lens, the video monitoring lens is connected with a video memory through a video data line, and the video monitoring lens is arranged at one end, far away from the track, of the wave feed port arrangement plate.
The infrared temperature measurement system comprises an infrared temperature measurement probe, the infrared temperature measurement probe is connected with the temperature storage device through an infrared temperature measurement lead, and the infrared temperature measurement probe is arranged at one end, far away from the track, of the wave feed port arrangement plate.
The test piece cooling system comprises a cold water/cold air spray head, the cold water/cold air spray head is connected with a cold water/cold air pump through a cold water/cold air guide pipe, and the cold water/cold air spray head is arranged at the top end of the test piece supporting frame.
The second technical scheme adopted by the invention is that the microwave-assisted rock breaking irradiation test method is implemented according to the following steps:
Processing the rock to be irradiated into the shape of 1.0 × 1.0m side2Fixing the test piece on the test piece supporting frame, wherein the thickness of the test piece is 20 cm;
step 3, selecting a test piece cooling mode according to a pre-designed test scheme, and selecting cold water cooling or cold air cooling according to a test piece cooling system;
step 4, starting the infrared temperature measurement system, measuring the temperature of the test piece in real time by the infrared temperature measurement probe, starting the video image acquisition system, and acquiring the surface image of the test piece by the video monitoring lens;
and 6, after the cooling in the step 5 is finished, firstly closing the microwave generator, then closing the test piece cooling system, and finally closing the infrared temperature measurement system and the video image acquisition system to finish the irradiation test.
The second technical scheme of the invention is also characterized in that:
the specific implementation steps of the step 2 are as follows:
step 2.1, according to a pre-designed test scheme, selecting a circular wave feed port arrangement plate or a rectangular wave feed port arrangement plate, fixing the selected wave feed port arrangement plate on a microwave irradiation system frame, and adjusting the distribution form and the distance of wave feed ports on a wave feed port slide way;
2.2, adjusting the distance between the test piece and the wave feed port arrangement plate through a track according to a pre-designed test scheme;
and 2.3, setting the power of a microwave generator in the microwave irradiation system and the microwave generation time period according to a pre-designed test scheme.
The invention has the beneficial effects that: the microwave-assisted rock breaking irradiation test method can realize tests in a microwave irradiation mode and a cooling mode, provides conditions for measuring the temperature distribution of a test piece and monitoring surface damage in the test process, has a reasonable structure, is simple to operate, is easy to implement, and can be widely used for microwave-assisted rock breaking irradiation tests.
Drawings
FIG. 1 is a schematic structural diagram of a microwave-assisted rock-breaking irradiation test device according to the present invention;
FIG. 2 is a schematic structural diagram of a microwave irradiation system in the microwave-assisted rock-breaking irradiation testing device according to the present invention;
FIG. 3 is a schematic view of a first structure of a wave feed port arrangement plate in the microwave-assisted rock-breaking irradiation testing device according to the present invention;
FIG. 4 is a schematic view of a second structure of a wave feed port arrangement plate in the microwave-assisted rock-breaking irradiation testing apparatus according to the present invention;
FIG. 5 is a schematic structural diagram of a test piece cooling system in the microwave-assisted rock breaking irradiation test device according to the present invention;
FIG. 6 is a schematic structural diagram of an infrared temperature measurement system in the microwave-assisted rock-breaking irradiation testing device of the present invention;
fig. 7 is a schematic structural diagram of a video image acquisition system in the microwave-assisted rock-breaking irradiation testing device of the present invention.
In the figure, 1, a microwave irradiation system frame, 2, a wave feed port arrangement plate, 3, a video monitoring lens, 4, a video data line, 5, a video memory, 6, a cold water/cold air pump, 7, a cold water/cold air guide pipe, 8, a cold water/cold air spray head, 9, a test piece supporting frame, 10, a test piece, 11, a rail, 12, an infrared temperature measuring probe, 13, an infrared temperature measuring lead, 14, a temperature memory, 15, a wave feed port slide way and 16, a wave feed port are arranged.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a microwave-assisted rock breaking irradiation test device, which comprises a microwave irradiation system and a test piece supporting frame 9, wherein the microwave irradiation system is connected with the test piece supporting frame 9 through a rail 11, the microwave irradiation system is fixedly connected with the rail 11, the test piece supporting frame 9 is movably connected with the rail 11, the test piece supporting frame 9 can slide on the rail 11, the microwave irradiation system is respectively connected with a video image acquisition system and an infrared temperature measurement system, and the test piece supporting frame is connected with a test piece cooling system;
as shown in fig. 2, the microwave irradiation system includes a microwave irradiation system frame 1 fixedly connected to a rail 11, a wave feed port arrangement plate 2 is disposed on the microwave irradiation system frame 1 and on a surface opposite to a test piece support frame 9, a plurality of wave feed port slideways 15 are disposed on the wave feed port arrangement plate 2, each wave feed port slideway 15 is provided with a plurality of microwave units, the number of the microwave units is 45, each microwave unit includes a microwave generator, the microwave generator is connected to one end of a waveguide, the other end of the waveguide is connected to a wave feed port 16, the wave feed port 16 is disposed on the wave feed port slideway 15, and the wave feed port 16 can slide on the wave feed port slideway 15;
the wave feed port arrangement plate 2 includes two forms:
as shown in fig. 3, the first: the wave feed port arrangement plate 2 is circular, a plurality of wave feed port slide ways 15 are arranged along the radial direction of the wave feed port arrangement plate, and included angles between every two adjacent wave feed port slide ways 15 are equal.
As shown in fig. 4, the second: the wave feed port arrangement plate 2 is rectangular, a plurality of wave feed port slide ways 15 are arranged between two opposite sides of the wave feed port arrangement plate, and the distances between the adjacent parallel wave feed port slide ways 15 are equal.
As shown in fig. 7, the video image capturing system includes a video monitoring lens 3, the video monitoring lens 3 is connected to a video memory 5 through a video data line 4, and the video monitoring lens 3 is disposed at one end of the wave feed port arrangement plate 2 far from the track 11.
As shown in fig. 6, the infrared temperature measurement system includes an infrared temperature measurement probe 12, the infrared temperature measurement probe 12 is connected to a temperature storage 14 through an infrared temperature measurement lead 13, and the infrared temperature measurement probe 12 is disposed at one end of the wave feed port arrangement plate 2 away from the track 11.
As shown in fig. 5, the test piece cooling system includes a cold water/cold air nozzle 8, the cold water/cold air nozzle 8 is connected to a cold water/cold air pump 6 through a cold water/cold air conduit 7, and the cold water/cold air nozzle 8 is disposed at the top end of a test piece support frame 9; the test piece cooling system can select cold water cooling or the cold air cooling as required, and cold water cooling is adopted, so that the medium can be cold water, cold air cooling is adopted, and cold air can be selected.
The invention relates to a microwave-assisted rock breaking irradiation test method, which is implemented according to the following steps:
Processing the rock to be irradiated into the shape of 1.0 × 1.0m side2A 20cm thick plate-shaped test piece 10, fixing the test piece 10 to the test piece support frame 9;
step 2.1, according to a pre-designed test scheme, selecting a circular wave feed port arrangement plate 2 or a rectangular wave feed port arrangement plate 2, fixing the selected wave feed port arrangement plate 2 on a microwave irradiation system frame 1, and adjusting the distribution form and the distance of wave feed ports 16 on a wave feed port slide way 15;
step 2.2, adjusting the distance between the test piece 10 and the wave feed port arrangement plate 2 through the track 11 according to a pre-designed test scheme (for example, the distance can be 20 cm);
step 2.3, setting the power of a microwave generator in the microwave irradiation system and the microwave generation time period (for example: 1.5 kilowatt time duration 5 seconds, stop for 2 seconds, and then 1.5 kilowatt time duration 5 seconds) according to a pre-designed test scheme;
step 3, selecting a test piece cooling mode according to a pre-designed test scheme, and selecting cold water cooling or cold air cooling according to a test piece cooling system, wherein the cold water cooling or cold water cooling, air temperature, water temperature, time keeping and the like are specifically included;
step 4, starting the infrared temperature measurement system, measuring the temperature of the test piece 10 in real time by the infrared temperature measurement probe 12, starting the video image acquisition system, and acquiring the surface image of the test piece 10 by the video monitoring lens 3;
and 6, after the cooling in the step 5 is finished, firstly closing the microwave generator, then closing the test piece cooling system, and finally closing the infrared temperature measurement system and the video image acquisition system to finish the irradiation test.
The microwave-assisted rock breaking irradiation test method can adjust the distribution form and irradiation distance of a wave feed port, can select different cooling modes, has multiple conditions and schemes met by the test, provides conditions for measuring the temperature distribution of a test piece and monitoring the surface damage in the test process, has a reasonable structure, is simple to operate, is easy to implement, can be widely used for microwave-assisted rock breaking irradiation tests, and can provide research data support for the influence of different irradiation modes of microwaves on the mechanical properties of rocks.
Claims (10)
1. The utility model provides a supplementary broken rock of microwave irradiation test device, its characterized in that includes microwave irradiation system and test piece braced frame (9), microwave irradiation system and test piece braced frame (9) are connected through track (11), microwave irradiation system's being connected with video image acquisition system, infrared temperature measurement system respectively, test piece braced frame is connected with test piece cooling system.
2. The microwave-assisted rock breaking irradiation testing device according to claim 1, wherein the microwave irradiation system comprises a microwave irradiation system frame (1) connected with a track (11), a wave feeding port arrangement plate (2) is arranged on the microwave irradiation system frame (1) and on a surface opposite to the test piece supporting frame (9), a plurality of wave feeding port slideways (15) are arranged on the wave feeding port arrangement plate (2), and a plurality of microwave units are arranged on each wave feeding port slideway (15).
3. A microwave-assisted rock breaking irradiation test device according to claim 2, wherein each microwave unit comprises a microwave generator, the microwave generator is connected with one end of a waveguide, the other end of the waveguide is connected with a wave feeding port (16), and the wave feeding port (16) is arranged on a wave feeding port slide way (15).
4. A microwave-assisted rock breaking irradiation test device according to claim 3, characterized in that the wave feed port arrangement plate (2) is circular, a plurality of wave feed port slideways (15) are arranged along the radial direction, and the included angles between adjacent wave feed port slideways (15) are equal.
5. A microwave-assisted rock breaking irradiation test device according to claim 3, characterized in that the wave feed port arrangement plate (2) is rectangular, a plurality of wave feed port slideways (15) are arranged between two opposite sides of the wave feed port arrangement plate, and the distances between the adjacent mutually parallel wave feed port slideways (15) are equal.
6. The microwave-assisted rock breaking irradiation testing device according to claim 2, wherein the video image acquisition system comprises a video monitoring lens (3), the video monitoring lens (3) is connected with a video memory (5) through a video data line (4), and the video monitoring lens (3) is arranged at one end of the wave feed port arrangement plate (2) far away from the track (11).
7. The microwave-assisted rock breaking irradiation testing device according to claim 2, characterized in that the infrared temperature measuring system comprises an infrared temperature measuring probe (12), the infrared temperature measuring probe (12) is connected with a temperature storage (14) through an infrared temperature measuring lead (13), and the infrared temperature measuring probe (12) is arranged at one end of the wave feed port arrangement plate (2) far away from the track (11).
8. The microwave-assisted rock breaking irradiation test device according to claim 1, wherein the test piece cooling system comprises a cold water/cold air nozzle (8), the cold water/cold air nozzle (8) is connected with a cold water/cold air pump (6) through a cold water/cold air conduit (7), and the cold water/cold air nozzle (8) is arranged at the top end of a test piece supporting frame (9).
9. A microwave-assisted rock-breaking irradiation test method is characterized in that a device for detecting the difference between zero points of a combined image type pair of leveling staff according to any one of claims 2-8 is adopted, and the method is implemented according to the following steps:
step 1, manufacturing and installing a test piece (10)
Processing the rock to be irradiated into the shape of 1.0 × 1.0m side2A plate-shaped test piece (10) with the thickness of 20cm, and fixing the test piece (10) on the test piece supporting frame (9);
step 2, setting a microwave irradiation mode;
step 3, selecting a test piece cooling mode according to a pre-designed test scheme, and selecting cold water cooling or cold air cooling according to a test piece cooling system;
step 4, starting an infrared temperature measurement system, measuring the temperature of the test piece (10) in real time by an infrared temperature measurement probe (12), starting a video image acquisition system, and acquiring the surface image of the test piece (10) by a video monitoring lens (3);
step 5, setting the mode of the microwave generators according to a pre-designed test scheme, starting the microwave generators, carrying out microwave irradiation on the test piece (10), and starting the cooling mode selected in the step 3 to cool the test piece (10) after irradiation is finished;
and 6, after the cooling in the step 5 is finished, firstly closing the microwave generator, then closing the test piece cooling system, and finally closing the infrared temperature measurement system and the video image acquisition system to finish the irradiation test.
10. The microwave-assisted rock breaking irradiation test method according to claim 9, wherein the step 2 is implemented by the following steps:
step 2.1, according to a pre-designed test scheme, selecting a circular wave feed port arrangement plate (2) or a rectangular wave feed port arrangement plate (2), fixing the selected wave feed port arrangement plate (2) on a microwave irradiation system frame (1), and adjusting the distribution form and the distance of wave feed ports (16) on a wave feed port slide way (15);
2.2, adjusting the distance between the test piece (10) and the wave feed port arrangement plate (2) through the rail (11) according to a pre-designed test scheme;
and 2.3, setting the power of a microwave generator in the microwave irradiation system and the microwave generation time period according to a pre-designed test scheme.
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| CN202010530557.1A CN111912871A (en) | 2020-06-11 | 2020-06-11 | Microwave-assisted rock breaking irradiation test device and test method thereof |
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| CN202010530557.1A CN111912871A (en) | 2020-06-11 | 2020-06-11 | Microwave-assisted rock breaking irradiation test device and test method thereof |
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Application publication date: 20201110 |