CN114527032A - Efficient granular coal crushing device and gas analysis amount measuring method - Google Patents
Efficient granular coal crushing device and gas analysis amount measuring method Download PDFInfo
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- CN114527032A CN114527032A CN202210165139.6A CN202210165139A CN114527032A CN 114527032 A CN114527032 A CN 114527032A CN 202210165139 A CN202210165139 A CN 202210165139A CN 114527032 A CN114527032 A CN 114527032A
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- 239000003245 coal Substances 0.000 title claims abstract description 92
- 238000004868 gas analysis Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000000227 grinding Methods 0.000 claims abstract description 116
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 18
- 230000009471 action Effects 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000003034 coal gas Substances 0.000 claims description 2
- 238000003556 assay Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 4
- 238000004880 explosion Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract 2
- 238000010298 pulverizing process Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
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- 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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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a high-efficiency particle coal crushing device and a gas analysis amount measuring method, belonging to the technical field of coal crushing and gas measurement, wherein the high-efficiency particle coal crushing device comprises a millstone cavity and a coal sample crushing mechanism; the grinding disc cavity comprises a cylinder body and a grinding disc cover for covering the cylinder body; the grinding disc cover is connected with the cylinder body to form a closed grinding disc cavity; the coal sample crushing mechanism is arranged in the grinding disc cavity, and a gas concentration sensor is arranged in the grinding disc cavity; and the grinding disc cavity is provided with a pressure measuring interface which is communicated with the grinding disc cavity. The invention adopts the millstone mode to crush the coal sample, has the advantages of no collision, low heating and low noise in the crushing process, and realizes the safe crushing of the coal sample in the explosion 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 before and after crushing the coal sample and the gas concentration of a real object, so that the integrated arrangement of crushing and measurement is realized, and the efficiency and the safety are higher.
Description
Technical Field
The invention belongs to the technical field of coal crushing and gas measurement, and relates to a high-efficiency granular coal crushing device and a gas analysis amount measuring method.
Background
Coal sample crushing is a technical means for fully releasing gas, the conventional coal sample crushing equipment mainly depends on strong vibration force of an electromagnetic vibrator to continuously impact a coal sample and crush the coal sample, and the crushing process is accompanied with the characteristics of severe vibration, large noise, complex structure and the like. The development of a coal sample crushing device with higher safety is urgently needed.
Disclosure of Invention
In view of the above, the present invention is directed to a coal sample pulverization device and a gas analysis amount measurement method for solving the problems of pulverization of a coal sample and gas measurement in a process of measuring a gas content of the coal sample.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-efficiency 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 covering the cylinder body; the grinding disc cover is connected with the cylinder body to form a closed grinding disc cavity; the coal sample crushing mechanism is arranged in the grinding disc cavity, a gas concentration sensor is arranged in the grinding disc cavity, and the gas concentration sensor is used for acquiring the gas concentration of the crushed coal sample; 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 a coal sample is arranged on the upper grinding disc, a crushing groove is arranged on the lower grinding disc, one end of the crushing groove is communicated with the feeding channel, and the other end of the crushing 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 the coal sample is crushed.
Furthermore, a boss is arranged on the upper grinding disc; the barrel is provided with a step surface, and the boss is pressed and attached to the step surface; the upper grinding disc is pressed on the cylinder body and is relatively fixed with the cylinder body, so that the lower grinding disc and the upper grinding disc can rotate relatively.
Further, 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.
Further, the upper grinding disc is provided with a positioning hole; 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 fixing plate, and an output shaft of the motor is connected with the lower grinding disc; the motor is fixedly arranged on a 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.
A method for measuring the gas analysis amount of a granular coal sample by adopting the efficient crushing device for measuring the gas content of the granular coal comprises the following steps:
A. preparation before measurement: connecting an air pressure measuring device into the grinding disc cavity through a pressure measuring interface, and connecting a gas concentration sensor with a measuring instrument; putting a coal sample to be measured into the feeding channel, and sealing the grinding disc cavity; recording the air pressure of the grinding disc cavity before measurement;
B. crushing a coal sample: starting the coal sample crushing mechanism, wherein the coal sample is fully distributed in the crushing grooves of the lower millstone under the action of centrifugal force, fully crushing the coal sample, and releasing gas into the millstone cavity;
C. and (3) measuring the gas content: after the coal sample is fully crushed, respectively obtaining the air pressure and the gas concentration in the grinding disc cavity after the coal sample is crushed through air pressure measuring equipment and a gas concentration sensor, and calculating the gas analysis amount of the crushed coal sample.
Further, the gas analysis amount is calculated by the following formula,
in the formula: v is the gas analysis amount after the coal sample is crushed; delta P is the air pressure difference in the grinding disc cavities before and after crushing of the coal sample; rho is the gas concentration in the millstone cavity after the coal sample is crushed.
The invention has the beneficial effects that: the invention adopts the millstone mode to crush the coal sample, has the advantages of no collision, low heating and low noise in the crushing process, and realizes the safe crushing of the coal sample in the explosion 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 before and after crushing the coal sample and the gas concentration of a real object, so that the integrated arrangement of crushing and measurement is realized, and the efficiency and the safety are higher.
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 objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of an overall efficient pulverizer for measuring gas content in granular coal according to the present invention;
FIG. 2 is a sectional view of the high-efficiency pulverizer for measuring the gas content of granular coal according to the present invention;
FIG. 3 is an exploded view of the high-efficiency pulverizer for measuring the gas content of granular coal according to the present invention;
fig. 4 is a structural schematic diagram of the upper grinding disc.
Reference numerals: 1-a motor; 2, fixing a plate; 3-a cylinder body; 4-grinding disc cover; 5-a feeding cover; 6-grinding disc; 7-pressure measuring interface; 8-lower grinding disc; a 10-bond; 11-a bolt; 12-gas concentration sensor; 61-positioning holes; 62-loading and unloading holes; 63-feed seal groove; 64-a feed channel; 91-motor sealing ring; 92-grinding disc cover sealing ring; 93-feed lid sealing ring.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood 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 is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 4, an efficient pulverizing apparatus for determining gas content in granular coal includes a millstone cavity and a coal sample pulverizing mechanism; the grinding disc cavity comprises a cylinder body 3 and a grinding disc cover 4 for sealing the cylinder body 3; the grinding disc cover 4 is connected with the cylinder 3 to form a closed grinding disc cavity; the coal sample crushing mechanism is arranged in a grinding disc cavity, a gas concentration sensor 12 is arranged in the grinding disc cavity, and the gas concentration sensor 12 is used for acquiring the gas concentration of the crushed coal sample; the grinding disc cavity is provided with a pressure measuring connector 7, and the pressure measuring connector 7 is communicated with the grinding disc cavity.
The coal sample crushing mechanism comprises an upper grinding disc 6 and a lower grinding disc 8; the upper grinding disc 6 is coaxially arranged on the lower grinding disc 8, a feeding channel 64 for placing a coal sample is arranged on the upper grinding disc 6, a crushing groove is arranged on the lower grinding disc 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 the grinding disc cavity;
the outer wall of the cylinder 3 is provided with a power assembly, the lower grinding disc 8 is connected with the power assembly, and the power assembly drives the lower grinding disc 8 and the upper grinding disc 6 to rotate relatively, so that the coal sample is crushed.
The upper millstone 6 is provided with a boss; a step surface is arranged on the cylinder body 3, and the boss is pressed and attached to the step surface; the upper grinding disc 6 is pressed against the cylinder 3 and is 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.
One end of the feeding channel 64 far away from the crushing tank is provided with a feeding cover 5; a feeding cover sealing ring 93 is arranged between the feeding cover 5 and the upper grinding disc 6, and the feeding cover sealing ring 93 is installed in the feeding sealing groove 63 of the feeding channel 64.
The upper grinding disc 6 is provided with a positioning hole 61; the lower grinding disc 8 is provided with a positioning pin, and the positioning hole 61 is matched with the positioning pin so that the upper grinding disc 6 and the lower grinding disc 8 are coaxially positioned. The upper grinding disc 6 is also provided with a loading and unloading hole 62 which is convenient to disassemble.
A grinding disc cover sealing ring 92 is arranged between the upper grinding disc 6 and the grinding disc 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 barrel 3 through a bolt 11; a motor sealing ring 91 is arranged between the motor 1 and the fixed bottom plate.
The utility model provides a granule coal sample gas analytic volume measuring method, adopts the granule coal gas content survey in this embodiment to measure with high-efficient reducing mechanism, includes the following step:
A. preparation before measurement: connecting an air pressure measuring device into the grinding disc cavity through a pressure measuring interface 7, and connecting a gas concentration sensor 12 with a measuring instrument; placing the coal sample to be measured into the feed channel 64 and sealing the millstone cavity; recording the air pressure of the grinding disc cavity before measurement;
B. crushing a coal sample: starting the coal sample crushing mechanism, wherein the coal sample is fully distributed in the crushing grooves of the lower millstone under the action of centrifugal force, fully crushing the coal sample, and releasing gas into the millstone cavity; the coal sample is sealed in the grinding disc cavity, and the air pressure in the cavity is increased rapidly along with the release of gas;
C. and (3) measuring the gas content: after the coal sample is fully crushed, respectively obtaining the air pressure and the gas concentration in the grinding disc cavity after the coal sample is crushed through air pressure measuring equipment and a gas concentration sensor, and calculating the gas analysis amount of the crushed coal sample. The gas analysis amount is calculated by the following formula,
in the formula: v is the gas analysis amount after the coal sample is crushed; delta P is the air pressure difference in the grinding disc cavities before and after crushing of the coal sample; rho is the gas concentration in the millstone cavity after the coal sample is crushed.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (9)
1. The utility model provides a granule coal gas is high-efficient reducing mechanism for assay 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 covering the cylinder body; the grinding disc cover is connected with the cylinder body to form a closed grinding disc cavity; the coal sample crushing mechanism is arranged in the grinding disc cavity, and a gas concentration sensor is arranged in the grinding disc cavity; and a pressure measuring interface is arranged on the grinding disc cavity and communicated with the grinding disc cavity.
2. The efficient pulverizer for measuring gas content in granular coal according to claim 1, wherein: 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 a coal sample is arranged on the upper grinding disc, a crushing groove is arranged on the lower grinding disc, one end of the crushing groove is communicated with the feeding channel, and the other end of the crushing 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 the coal sample is crushed.
3. The efficient pulverizer for measuring gas content in granular coal according to claim 2, wherein: the upper grinding disc is provided with a boss; the barrel is provided with a step surface, and the boss is pressed and attached to the step surface.
4. The efficient pulverizer for measuring gas content in granular coal according to claim 2, 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.
5. The efficient pulverizer for measuring gas content in granular coal according to claim 2, wherein: the upper grinding disc is provided with a positioning hole; 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.
6. The efficient pulverizer for measuring gas content in granular coal according to claim 2, wherein: and a sealing ring is also arranged between the upper grinding disc and the grinding disc cover.
7. The efficient crushing device for measuring the gas content in the granular coal according to claim 2, wherein: the power assembly comprises a motor and a fixing plate, and an output shaft of the motor is connected with the lower grinding disc; the motor is fixedly arranged on a 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.
8. A method for measuring the gas analysis amount of a granular coal sample is characterized by comprising the following steps: the high-efficiency crushing device for measuring the gas content of the granular coal as claimed in any one of claims 1 to 7 is adopted for measurement, and comprises the following steps:
A. preparation before measurement: connecting an air pressure measuring device into the grinding disc cavity through a pressure measuring interface, and connecting a gas concentration sensor with a measuring instrument; putting a coal sample to be measured into the feeding channel, and sealing the grinding disc cavity; recording the air pressure of the grinding disc cavity before measurement;
B. crushing a coal sample: starting the coal sample crushing mechanism, wherein the coal sample is fully distributed in the crushing grooves of the lower millstone under the action of centrifugal force, fully crushing the coal sample, and releasing gas into the millstone cavity;
C. and (3) measuring the gas content: after the coal sample is fully crushed, respectively obtaining the air pressure and the gas concentration in the grinding disc cavity after the coal sample is crushed through air pressure measuring equipment and a gas concentration sensor, and calculating the gas analysis amount of the crushed coal sample.
9. The method for measuring the analytic amount of the granular coal-like gas according to claim 8, wherein: the gas resolution is calculated by the following formula,
in the formula: v is the gas analysis amount after the coal sample is crushed; delta P is the air pressure difference in the grinding disc cavities before and after crushing of the coal sample; rho is the gas concentration in the millstone cavity after the coal sample is crushed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 true CN114527032A (en) | 2022-05-24 |
| CN114527032B CN114527032B (en) | 2024-03-12 |
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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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- 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 |
Non-Patent Citations (3)
| Title |
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| 康志勤 等: "煤体结构与甲烷吸附/解吸规律相关性实验研究及启示", 煤炭学报, vol. 43, no. 05, pages 1400 - 1407 * |
| 张宪尚 等: "瓦斯含量快速测定技术应用研究", 工业安全与环保, vol. 43, no. 11, pages 38 - 40 * |
| 程行知: "对圆盘粉碎机盘形的研究与改进", 现代机械, no. 04, pages 39 - 42 * |
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