CN114527032B - Efficient crushing device for granular coal and gas analysis amount measuring method - Google Patents
Efficient crushing device for granular coal and gas analysis amount measuring method Download PDFInfo
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- CN114527032B CN114527032B CN202210165139.6A CN202210165139A CN114527032B CN 114527032 B CN114527032 B CN 114527032B CN 202210165139 A CN202210165139 A CN 202210165139A CN 114527032 B CN114527032 B CN 114527032B
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- 239000003245 coal Substances 0.000 title claims abstract description 91
- 238000004868 gas analysis Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000000227 grinding Methods 0.000 claims abstract description 85
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000010298 pulverizing process Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims 1
- 239000003034 coal gas Substances 0.000 claims 1
- 239000008187 granular material Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 4
- 239000002360 explosive Substances 0.000 abstract description 2
- 230000020169 heat generation Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/14—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference
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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
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/222—Solid fuels, e.g. coal
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a high-efficiency crushing device for granular coal and a gas analysis measuring method, belonging to the technical field of coal crushing and gas measurement; the grinding disc cavity comprises a cylinder body and a grinding disc cover for sealing the cylinder body; the millstone cover is connected with the cylinder body to form a closed millstone cavity; the coal sample crushing mechanism is arranged in the millstone cavity, and a gas concentration sensor is arranged in the millstone cavity; and the grinding disc cavity is provided with a pressure measuring interface which is communicated with the grinding disc cavity. The coal sample is crushed by adopting the grinding disc mode, and the coal sample crushing device has the advantages of non-collision, low heat generation and low noise in the crushing process, and realizes safe crushing of the coal sample in an explosive environment; and the crushing mechanism is arranged in the closed cavity, and the gas analysis amount of the coal sample is obtained by measuring the pressure difference of the cavity and the gas concentration of the real object before and after crushing the coal sample, so that the integrated arrangement of crushing and measurement is realized, and the system is more efficient and safer.
Description
Technical Field
The invention belongs to the technical field of coal crushing and gas measurement, and relates to a high-efficiency crushing device for granular coal and a gas analysis measuring method.
Background
Coal sample crushing is a technical means for fully releasing gas, and the current coal sample crushing equipment mainly uses the strong vibration force of an electromagnetic vibrator to continuously impact the coal sample and crush the coal sample, and has the characteristics of severe vibration, large noise, complex structure and the like in the crushing process. There is a great need to develop a coal sample comminution device with higher safety.
Disclosure of Invention
In view of the above, the present invention aims to provide a high-efficiency pulverizing device for granular coal and a method for measuring gas analysis, which aim at solving the problems of coal sample pulverization and gas measurement in the process of measuring the gas content of coal samples.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an efficient crushing device for measuring the gas content of granular coal comprises a millstone cavity and a coal sample crushing mechanism; the grinding disc cavity comprises a cylinder body and a grinding disc cover for sealing the cylinder body; the millstone cover is connected with the cylinder body to form a closed millstone cavity; the coal sample crushing mechanism is arranged in the millstone cavity, a gas concentration sensor is arranged in the millstone cavity, and the gas concentration sensor is used for acquiring the gas concentration of the crushed coal samples; and the grinding disc cavity is provided with a pressure measuring interface which is communicated with the grinding disc cavity.
Further, the coal sample crushing mechanism comprises an upper grinding disc and a lower grinding disc; the upper grinding disc is coaxially arranged on the lower grinding disc, a feeding channel for placing coal samples is arranged on the upper grinding disc, a grinding groove is arranged on the lower grinding disc, one end of the grinding groove is communicated with the feeding channel, and the other end of the grinding groove is communicated with a grinding disc cavity;
the outer wall of the cylinder body is provided with a power assembly, the lower grinding disc is connected with the power assembly, and the power assembly drives the lower grinding disc and the upper grinding disc to rotate relatively, so that a coal sample is crushed.
Further, a boss is arranged on the upper grinding disc; the cylinder body is provided with a step surface, and the boss is pressed on the step surface; the upper grinding disc is pressed on the cylinder body to enable the upper grinding disc and the cylinder body to be relatively fixed, so that the lower grinding disc and the upper grinding disc can relatively rotate.
Further, a feeding cover is arranged at one end of the feeding channel far away from the crushing groove; and a sealing ring is arranged between the feeding cover and the upper grinding disc.
Further, the upper grinding disc is provided with a positioning hole; and the lower grinding disc is provided with a positioning pin, and the positioning hole is matched with the positioning pin to coaxially position the upper grinding disc and the lower grinding disc.
Further, a sealing ring is also arranged between the upper grinding disc and the grinding disc cover.
Further, the power assembly comprises a motor and a fixed plate, and an output shaft of the motor is connected with the lower grinding disc; the motor is fixedly arranged on the fixed plate, and the fixed plate is fixedly connected with the cylinder body; and a sealing ring is also arranged between the motor and the fixed bottom plate.
The method for measuring the gas analysis amount of the granular coal sample by adopting the high-efficiency crushing device for measuring the gas content of the granular coal comprises the following steps of:
A. preparation before measurement: the gas pressure measuring equipment is connected into the millstone cavity through the pressure measuring interface, and the gas concentration sensor is communicated with the measuring instrument; placing a coal sample to be measured into a feed channel, and sealing a millstone cavity; recording and measuring the air pressure of a front millstone cavity;
B. crushing a coal sample: starting a coal sample crushing mechanism, wherein the coal sample is fully crushed by the crushing grooves of the lower millstone under the action of centrifugal force, and gas is released into the millstone cavity;
C. and (3) gas content measurement: after the coal sample is sufficiently crushed, the air pressure and the gas concentration in the cavity of the millstone after the coal sample is crushed are respectively obtained through an air pressure measuring device and a gas concentration sensor, and the gas analysis amount of the crushed coal sample is calculated.
Further, the gas analysis amount is calculated by the following formula,
wherein: v is the gas analysis amount after coal sample crushing; ΔP is the air pressure difference in the grinding disc cavities before and after coal sample crushing; ρ is the gas concentration in the millstone cavity after the coal sample is crushed.
The invention has the beneficial effects that: the coal sample is crushed by adopting the grinding disc mode, and the coal sample crushing device has the advantages of non-collision, low heat generation and low noise in the crushing process, and realizes safe crushing of the coal sample in an explosive environment; and the crushing mechanism is arranged in the closed cavity, and the gas analysis amount of the coal sample is obtained by measuring the pressure difference of the cavity and the gas concentration of the real object before and after crushing the coal sample, so that the integrated arrangement of crushing and measurement is realized, and the system is more efficient and safer.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of an overall high-efficiency crushing device for measuring the gas content of granular coal;
FIG. 2 is a cross-sectional view of the high-efficiency pulverizing apparatus for measuring gas content of granular coal according to the present invention;
FIG. 3 is an exploded view of the high-efficiency pulverizing device for measuring gas content of the granular coal of the present invention;
fig. 4 is a schematic structural view of the upper grinding disc.
Reference numerals: 1-a motor; 2-a fixing plate; 3-a cylinder; 4-grinding disc cover; 5-a feed cap; 6-feeding the grinding disc; 7-pressure measuring interface; 8-lower grinding disc; 10-bond; 11-bolts; 12-a gas concentration sensor; 61-positioning holes; 62-a loading and unloading hole; 63-a feed seal slot; 64-feed channel; 91-a motor sealing ring; 92-grinding disc cover sealing rings; 93-sealing ring of the feeding cover.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1-4, a high-efficiency crushing device for measuring the gas content of granular coal comprises a millstone cavity and a coal sample crushing mechanism; the millstone cavity comprises a barrel 3 and a millstone cover 4 for covering the barrel 3; the millstone cover 4 is connected with the cylinder body 3 to form a closed millstone cavity; the coal sample crushing mechanism is arranged in a millstone cavity, a gas concentration sensor 12 is arranged in the millstone cavity, and the gas concentration sensor 12 is used for acquiring the gas concentration of the crushed coal samples; the millstone cavity is provided with a pressure measuring interface 7, and the pressure measuring interface 7 is communicated with the millstone cavity.
The coal sample crushing mechanism comprises an upper grinding disc 6 and a lower grinding disc 8; the upper millstone 6 is coaxially arranged on the lower millstone 8, a feeding channel 64 for placing coal samples is arranged on the upper millstone 6, a crushing groove is arranged on the lower millstone 8, one end of the crushing groove is communicated with the feeding channel 64, and the other end of the crushing groove is communicated with a millstone cavity;
the outer wall of the cylinder body 3 is provided with a power component, the lower grinding disc 8 is connected with the power component, and the power component drives the lower grinding disc 8 to rotate relative to the upper grinding disc 6, so that the coal sample is crushed.
A boss is arranged on the upper grinding disc 6; the cylinder body 3 is provided with a step surface, and the boss is pressed on the step surface; the upper grinding disc 6 is pressed against the cylinder 3 to be fixed relative to the cylinder 3, so that the lower grinding disc 8 and the upper grinding disc 6 can rotate relative to each other.
The end of the feed channel 64, which is far away from the crushing groove, is provided with a feed cover 5; a feed cap seal ring 93 is arranged between the feed cap 5 and the upper grinding disc 6, and the feed cap seal ring 93 is installed in the feed seal groove 63 of the feed channel 64.
The upper grinding disc 6 is provided with a positioning hole 61; the lower grinding disc 8 is provided with a locating pin, and the locating hole 61 is matched with the locating pin to enable the upper grinding disc 6 and the lower grinding disc 8 to be coaxially located. The upper grinding disc 6 is also provided with a loading and unloading hole 62 which is convenient to detach.
A millstone cover sealing ring 92 is arranged between the upper millstone 6 and the millstone cover 4.
The power assembly comprises a motor 1 and a fixed plate 2, and an output shaft of the motor 1 is connected with a lower grinding disc 8 through a key 10; the motor 1 is fixedly arranged on the fixed plate 2, and the fixed plate 2 is fixedly arranged at the bottom of the cylinder 3 through bolts 11; a motor sealing ring 91 is arranged between the motor 1 and the fixed bottom plate.
The method for measuring the gas analysis of the granular coal sample adopts the high-efficiency crushing device for measuring the gas content of the granular coal in the embodiment for measurement, and comprises the following steps:
A. preparation before measurement: the air pressure measuring equipment is connected into the millstone cavity through the pressure measuring interface 7, and the gas concentration sensor 12 is communicated with the measuring instrument; placing a coal sample to be measured into the feed channel 64 and sealing the millstone cavity; recording and measuring the air pressure of a front millstone cavity;
B. crushing a coal sample: starting a coal sample crushing mechanism, wherein the coal sample is fully crushed by the crushing grooves of the lower millstone under the action of centrifugal force, and gas is released into the millstone cavity; the coal sample is sealed in the cavity of the grinding disc, and the air pressure in the cavity is increased sharply along with the release of the gas;
C. and (3) gas content measurement: after the coal sample is sufficiently crushed, the air pressure and the gas concentration in the cavity of the millstone after the coal sample is crushed are respectively obtained through an air pressure measuring device and a gas concentration sensor, and the gas analysis amount of the crushed coal sample is calculated. The gas analysis amount is calculated by the following formula,
wherein: v is the gas analysis amount after coal sample crushing; ΔP is the air pressure difference in the grinding disc cavities before and after coal sample crushing; ρ is the gas concentration in the millstone cavity after the coal sample is crushed.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (8)
1. The utility model provides a granule coal gas content survey is with high-efficient reducing mechanism which characterized in that: comprises a millstone cavity and a coal sample crushing mechanism; the grinding disc cavity comprises a cylinder body and a grinding disc cover for sealing the cylinder body; the millstone cover is connected with the cylinder body to form a closed millstone cavity; the coal sample crushing mechanism is arranged in the millstone cavity, and a gas concentration sensor is arranged in the millstone cavity; the grinding disc cavity is provided with a pressure measuring interface which is communicated with the grinding disc cavity;
the coal sample crushing mechanism comprises an upper millstone and a lower millstone; the upper grinding disc is coaxially arranged on the lower grinding disc, a feeding channel for placing coal samples is arranged on the upper grinding disc, a grinding groove is arranged on the lower grinding disc, one end of the grinding groove is communicated with the feeding channel, and the other end of the grinding groove is communicated with a grinding disc cavity;
the outer wall of the cylinder body is provided with a power assembly, the lower grinding disc is connected with the power assembly, and the power assembly drives the lower grinding disc and the upper grinding disc to rotate relatively, so that a coal sample is crushed.
2. The efficient pulverizing device for measuring the gas content of granular coal according to claim 1, wherein: a boss is arranged on the upper grinding disc; the cylinder body is provided with a step surface, and the boss is pressed on the step surface.
3. The efficient pulverizing device for measuring the gas content of granular coal according to claim 1, wherein: a feeding cover is arranged at one end of the feeding channel, which is far away from the crushing groove; and a sealing ring is arranged between the feeding cover and the upper grinding disc.
4. The efficient pulverizing device for measuring the gas content of granular coal according to claim 1, wherein: the upper grinding disc is provided with a positioning hole; and the lower grinding disc is provided with a positioning pin, and the positioning hole is matched with the positioning pin to coaxially position the upper grinding disc and the lower grinding disc.
5. The efficient pulverizing device for measuring the gas content of granular coal according to claim 1, wherein: and a sealing ring is also arranged between the upper grinding disc and the grinding disc cover.
6. The efficient pulverizing device for measuring the gas content of granular coal according to claim 1, wherein: the power assembly comprises a motor and a fixed plate, and an output shaft of the motor is connected with the lower grinding disc; the motor is fixedly arranged on the fixed plate, and the fixed plate is fixedly connected with the cylinder body; and a sealing ring is also arranged between the motor and the fixed bottom plate.
7. A method for measuring the analysis amount of gas in a granular coal sample is characterized by comprising the following steps: the method for measuring the gas content of the granular coal by adopting the high-efficiency crushing device for measuring the gas content of the granular coal according to any one of claims 1 to 6 comprises the following steps:
A. preparation before measurement: the gas pressure measuring equipment is connected into the millstone cavity through the pressure measuring interface, and the gas concentration sensor is communicated with the measuring instrument; placing a coal sample to be measured into a feed channel, and sealing a millstone cavity; recording and measuring the air pressure of a front millstone cavity;
B. crushing a coal sample: starting a coal sample crushing mechanism, wherein the coal sample is fully crushed by the crushing grooves of the lower millstone under the action of centrifugal force, and gas is released into the millstone cavity;
C. and (3) gas content measurement: after the coal sample is sufficiently crushed, the air pressure and the gas concentration in the cavity of the millstone after the coal sample is crushed are respectively obtained through an air pressure measuring device and a gas concentration sensor, and the gas analysis amount of the crushed coal sample is calculated.
8. The method for measuring the gas analysis of the granular coal sample according to claim 7, wherein: the gas analysis amount is calculated by the following formula,
wherein: v is the gas analysis amount after coal sample crushing; ΔP is the air pressure difference in the grinding disc cavities before and after coal sample crushing; ρ is the gas concentration in the millstone cavity after the coal sample is crushed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210165139.6A CN114527032B (en) | 2022-02-18 | 2022-02-18 | Efficient crushing device for granular coal and gas analysis amount measuring method |
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| CN202210165139.6A CN114527032B (en) | 2022-02-18 | 2022-02-18 | Efficient crushing device for granular coal and gas analysis amount measuring method |
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| CN114527032A CN114527032A (en) | 2022-05-24 |
| CN114527032B true CN114527032B (en) | 2024-03-12 |
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|---|---|---|---|---|
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| CN203191367U (en) * | 2013-03-06 | 2013-09-11 | 西安科技大学 | Portable underground desorbing/crushing desorbing integrated device |
| RU2601205C1 (en) * | 2015-08-07 | 2016-10-27 | Акционерное общество "Метан Кузбасса" | Method of determining gas content of coal beds |
| CN113310631A (en) * | 2021-05-31 | 2021-08-27 | 贵州省矿山安全科学研究院有限公司 | Method for rapidly determining coal seam gas content and portable device |
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- 2022-02-18 CN CN202210165139.6A patent/CN114527032B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004317260A (en) * | 2003-04-15 | 2004-11-11 | Kansai Coke & Chem Co Ltd | Method for measuring quantity of discharge of gas included in coal |
| CN203191367U (en) * | 2013-03-06 | 2013-09-11 | 西安科技大学 | Portable underground desorbing/crushing desorbing integrated device |
| RU2601205C1 (en) * | 2015-08-07 | 2016-10-27 | Акционерное общество "Метан Кузбасса" | Method of determining gas content of coal beds |
| CN113310631A (en) * | 2021-05-31 | 2021-08-27 | 贵州省矿山安全科学研究院有限公司 | Method for rapidly determining coal seam gas content and portable device |
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| Title |
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