CN108507914B - Coal mine dust sampler device - Google Patents
Coal mine dust sampler device Download PDFInfo
- Publication number
- CN108507914B CN108507914B CN201810207301.XA CN201810207301A CN108507914B CN 108507914 B CN108507914 B CN 108507914B CN 201810207301 A CN201810207301 A CN 201810207301A CN 108507914 B CN108507914 B CN 108507914B
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- rotary pipe
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- 239000000428 dust Substances 0.000 title claims abstract description 58
- 239000003245 coal Substances 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 7
- 230000007246 mechanism Effects 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 238000001514 detection method Methods 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims 6
- 230000003020 moisturizing effect Effects 0.000 description 14
- 239000006185 dispersion Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005065 mining Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement 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
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0606—Investigating concentration of particle suspensions by collecting particles on a support
- G01N15/0618—Investigating concentration of particle suspensions by collecting particles on a support of the filter type
- G01N15/0631—Separation of liquids, e.g. by absorption, wicking
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a coal mine dust sampler device, which comprises a box body, wherein supporting legs are symmetrically arranged on two sides of the lower end of the box body, supporting sleeves are slidably sleeved on the lower ends of the supporting legs, supporting blocks are arranged at the lower ends of the supporting sleeves, buffer springs are arranged in the supporting sleeves and connect and fix the supporting sleeves and the supporting legs, the arrangement of a buffer mechanism effectively improves the anti-seismic performance of the device, a movable bottom plate is movably arranged at the bottom in the box body, the right end of the movable bottom plate is connected with a movable sealing plate, a material taking hole is formed in the right side of the box body where the movable sealing plate is located, a sealing pad is arranged between the movable sealing plate and the box body, a pull ring is arranged on the right side of the movable sealing plate, limiting blocks are symmetrically arranged on two.
Description
Technical Field
The invention relates to the technical field of coal mine dust sampling and collection, in particular to a coal mine dust sampler device.
Background
Along with the increasing mining intensity of coal mines, the dust amount of the mining working face is increased, a large amount of dust directly harms the body health of underground miners, the danger of dust explosion is increased, and the accurate control of the dust dispersion degree of the underground mining working face is an important means for avoiding the harm of underground dust.
The dust dispersity serves as an important underground monitoring index parameter, the authenticity of a detection result is important, and main factors capable of influencing the dust dispersity detection result come from a dust collection process. The most commonly used dust collection method at the present stage is a hanging scaffold method, wherein a sampling plate is hung near a tunnel top plate, sampling plates are placed on two sides of a tunnel and two sides of a bottom plate, filter paper is used for collecting dust, after dust settlement is finished, the filter paper is generally folded or the dust on the filter paper is directly transferred to a container, and then the container filled with the dust is sent to a laboratory for detecting the dust dispersity.
But is disturbed by human factors during the transfer of the dust to the container. Firstly, in the process of manually picking up the filter paper, the phenomenon that certain dust on the filter paper falls off due to shaking cannot be avoided, and the final detection result of the dust dispersion degree is directly distorted; secondly, the manual replacement of the filter paper is directly carried out in the field exposed environment, and because the filter paper has strong electrostatic adsorption, the filter paper is prevented from adsorbing some redundant dust during manual replacement, and the redundant dust can also directly cause the distortion of the dust dispersion degree detection result. That is to say, the reality of the dust dispersion degree detected by the dust collected by the traditional method is deducted by the large beating rule, and the distribution rule of the dust dispersion degree of the mining working flour cannot be truly reflected, so that the danger of underground operation is correspondingly increased.
Disclosure of Invention
The invention aims to provide a coal mine dust sampler device to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a coal mine dust sampler device comprises a box body, wherein supporting legs are symmetrically arranged on two sides of the lower end of the box body, supporting sleeves are slidably sleeved at the lower ends of the supporting legs, supporting blocks are arranged at the lower ends of the supporting sleeves, buffer springs are arranged in the supporting sleeves and connect and fix the supporting sleeves and the supporting legs, the arrangement of the buffer mechanism effectively improves the anti-seismic performance of the device, a movable bottom plate is movably arranged at the bottom in the box body, the right end of the movable bottom plate is connected with a movable sealing plate, a material taking port is arranged on the right side of the box body where the movable sealing plate is arranged, a sealing gasket is arranged between the movable sealing plate and the box body, a pull ring is arranged on the right side of the movable sealing plate, limiting blocks are symmetrically arranged on two sides of the upper end of the movable bottom plate, a clamping groove is formed between the limiting blocks, the air guide pipe is matched in the guide sleeve in a sliding manner, the inner wall of the guide sleeve is provided with a sealing ring, the air guide pipe and the guide sleeve are sealed in a sliding manner by the arrangement of the sealing ring, an air pump is arranged at the upper end opening of the air guide pipe, side plates are symmetrically arranged at the left side and the right side of the air pump, hydraulic telescopic rods are symmetrically arranged at the upper end of the upper cover, the output end of each hydraulic telescopic rod is connected and fixed with the side plates, the air guide pipe is driven to slide up and down along the guide sleeve by the extension and retraction of the hydraulic telescopic rods, the lower end of the air guide pipe is rotatably provided with a rotary pipe, fan blades are arranged inside the rotary pipe close to the air guide pipe, a sealing plate at the lower end of the rotary pipe is provided with a plurality of air injection holes outside the lower end, when the device works, under the action of the air pump, external air enters the movable inner barrel along the air guide pipe and the rotary pipe, the air is sprayed out from the air spraying holes on the rotary pipe, the air entering the movable inner barrel can be washed by water, dust in the air can be retained in water, when the air passes through the rotary pipe, the fan blades can drive the rotary pipe to rotate and further drive the stirring rod to rotate, the stirring rod can crush the air when rotating, so that the contact area of the air and the water is improved, the washing effect on the air is improved, clean air can be discharged from the air outlet at the upper left side of the box body, the weight of the movable inner barrel is detected through the pressure sensor, the weight change of the movable inner barrel is the absorbed dust weight, the air guide pipe is also provided with a flow meter, the gas passing through the unit time is counted, and the dust amount in the air is calculated through calculating the dust weight, thereby calculate the heavy dust concentration of air, when taking out the activity inner tube in the later stage, adjust the rotatory pipe height through hydraulic telescoping rod extension to make the rotatory pipe take out from the activity inner tube.
As a further scheme of the invention: the upper left side inner wall of box is equipped with the moisturizing case, is equipped with the moisturizing pump in the moisturizing case, and the output of moisturizing pump is equipped with the moisturizing pipe, still be equipped with temperature sensor on the moisturizing case, calculate the volatilization velocity of water through the temperature of detection device place environment, and then in time for the inside makeup water of activity inner tube to further reduce detection error, improved the accuracy of sampling.
As a still further scheme of the invention: the upper cover is fixedly connected with the box body through bolts.
As a still further scheme of the invention: and a material blocking grid is arranged at the air inlet end of the air pump.
As a still further scheme of the invention: and the upper end of the rotating pipe is provided with a rotating bearing and a sealing ring which are matched with the air guide pipe.
As a still further scheme of the invention: the pressure sensor is electrically connected with the control panel through the wireless transmission module.
Compared with the prior art, the invention has the beneficial effects that: when the device works, under the action of the air pump, external air enters the movable inner barrel along the air guide pipe and the rotary pipe, the air is sprayed out from the air spraying holes on the rotary pipe, the air entering the movable inner barrel can be washed by water, dust in the air can be retained in water, when the air passes through the rotary pipe, the fan blades can drive the rotary pipe to rotate and further drive the stirring rod to rotate, the stirring rod can crush the air when rotating, so that the contact area of the air and the water is improved, the washing effect on the air is improved, clean air can be discharged from the air outlet at the upper left side of the box body, the weight of the movable inner barrel is detected through the pressure sensor, the weight change of the movable inner barrel is the absorbed dust weight, the air guide pipe is also provided with a flow meter, the gas passing through the unit time is counted, and the dust amount in the air is calculated through calculating the dust weight, thereby calculate the heavy dust concentration of air, when taking out the activity inner tube at the later stage, adjust the rotatory pipe height through the hydraulic telescoping rod extension to make the rotatory pipe take out from the activity inner tube, the upper left side inner wall of box is equipped with the moisturizing case, is equipped with the moisturizing pump in the moisturizing case, and the output of moisturizing pump is equipped with the moisturizing pipe, still be equipped with temperature sensor on the moisturizing case, calculate the speed of volatilizing of water through the temperature of detection device place environment, and then in time for the inside moisturizing water of activity inner tube, thereby further reduce detection error, improved the accuracy of sampling, the practicality is strong.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein: the device comprises a box body 1, an exhaust port 2, a water replenishing tank 3, a limiting block 4, a supporting leg 5, a supporting sleeve 6, a supporting block 7, a buffer spring 8, an air jet hole 9, a pressure sensor 10, a movable bottom plate 11, a movable sealing plate 12, a pull ring 13, a wireless transmission module 14, an observation window 15, a movable inner cylinder 16, a storage battery 17, an upper cover 18, a control panel 19, a side plate 20, an air suction pump 21, a material blocking grid 22, a hydraulic telescopic rod 23, a guide sleeve 24, an air duct 25, fan blades 26, a water replenishing pipe 27, a liquid level sensor 28, a sealing ring 29, a rotating bearing 30 and a rotating pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in the embodiment of the invention, a coal mine dust sampler device comprises a box body 1, wherein supporting legs 5 are symmetrically arranged on two sides of the lower end of the box body 1, a supporting sleeve 6 is slidably sleeved on the lower end of each supporting leg 5, a supporting block 7 is arranged at the lower end of each supporting sleeve 6, a buffer spring 8 is arranged in each supporting sleeve 6, the supporting sleeve 6 and the supporting legs 5 are fixedly connected through the buffer spring 8, the arrangement of the buffer mechanism effectively improves the anti-seismic performance of the device, a movable bottom plate 11 is movably arranged at the bottom in the box body 1, a movable closing plate 12 is connected to the right end of the movable bottom plate 11, a material taking port is arranged on the right side of the box body 1 where the movable closing plate 12 is located, a sealing gasket is arranged between the movable closing plate 12 and the box body 1, a pull ring 13 is arranged on the right side, the dust collecting water is arranged in the movable inner barrel 16, the upper end of the box body 1 is provided with an upper cover 18, the upper cover 18 is fixedly connected with the box body 1 through bolts, the middle position of the upper end of the upper cover 18 is provided with a guide sleeve 24, an air guide pipe 25 is in sliding fit in the guide sleeve 24, the inner wall of the guide sleeve 24 is provided with a sealing ring, the air guide pipe 25 is in sliding seal with the guide sleeve 24 through the arrangement of the sealing ring, an air suction pump 21 is arranged at the upper end opening of the air guide pipe 25, a material blocking grid 22 is arranged at the air inlet end of the air suction pump 21, side plates 20 are symmetrically arranged on the left side and the right side of the air suction pump 21, hydraulic telescopic rods 23 are symmetrically arranged on the two sides of the upper end of the upper cover 18, the output end of each hydraulic telescopic rod 23 is fixedly connected with the side plates 20, the air guide pipe 25 is driven to slide, the fan blades 26 are arranged inside the rotary pipe 31 close to the air guide pipe 25, the lower end of the rotary pipe 31 is provided with a sealing plate, the outer side of the lower end of the rotary pipe 31 is provided with a plurality of air injection holes 9, stirring rods are symmetrically arranged on two sides of the rotary pipe 31 above the air injection holes 9, the bottom of the movable inner cylinder 16 is provided with the pressure sensor 10, the air suction pump 21 and the hydraulic telescopic rod 23 are electrically connected with the control panel 19, the control panel 19 is electrically connected with the storage battery 17, the hydraulic sensor 10 is electrically connected with the control panel 19 through the wireless transmission module 14, when the device works, under the action of the air suction pump 21, outside air enters the movable inner cylinder 16 along the air guide pipe 25 and the rotary pipe 31, then is ejected out from the air injection holes 9 on the rotary pipe 31, the air entering the movable inner cylinder 16 can be washed by water, dust in the air can be retained in, and then drive the puddler to rotate, will pulverize the air when the puddler rotates, thus improve the contact area of air and water, thus improve the washing effect to the air, clean air will be discharged from the upper left side exhaust port 2 of the container body 1, detect the weight of the movable inner tube 16 through the pressure sensor 10, the weight change of the movable inner tube 16 is the weight of absorbed dust, still there are flowmeters on the said air duct 25, and then count the gas that passes through in unit time, calculate the amount of dust in the air through calculating the weight of dust of the unit volume of air, thus calculate the concentration of heavy dust of air, when taking out the movable inner tube 16 in the later stage, adjust the height of the rotary pipe 31 through the extension of the hydraulic telescoping rod 23, thus make the rotary pipe 31 take out from the movable inner tube 16, the upper left side inner wall of said container body 1 has make-up water tanks 3, there are make-up water pumps in the make, still be equipped with temperature sensor on the moisturizing case 3, calculate the speed of volatilizing of water through the temperature of detection device place environment, and then in time for the inside makeup water of activity inner tube 16 to further reduce detection error, improved the accuracy of sampling.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The coal mine dust sampler device comprises a box body (1) and is characterized in that supporting legs (5) are symmetrically arranged on two sides of the lower end of the box body (1), a supporting sleeve (6) is slidably sleeved on the lower end of each supporting leg (5), a supporting block (7) is arranged at the lower end of each supporting sleeve (6), a buffer spring (8) is arranged in each supporting sleeve (6), each supporting sleeve (6) and each supporting leg (5) are fixedly connected through the buffer spring (8), the arrangement of the buffer mechanism effectively improves the anti-seismic performance of the device, a movable bottom plate (11) is movably arranged at the bottom in the box body (1), the right end of the movable bottom plate (11) is connected with a movable sealing plate (12), a material taking port is arranged on the right side of the box body (1) where the movable sealing plate (12) is located, a sealing gasket is arranged between the movable sealing plate (12) and, the movable bottom plate is characterized in that limiting blocks (4) are symmetrically arranged on two sides of the upper end of the movable bottom plate, a clamping groove is formed between the limiting blocks (4), a movable inner cylinder (16) is placed in the clamping groove, dust collecting water is filled in the movable inner cylinder (16), an upper cover (18) is arranged at the upper end of the box body (1), a guide sleeve (24) is arranged at the middle position of the upper end of the upper cover (18), an air duct (25) is arranged in the guide sleeve (24) in a sliding fit mode, a sealing ring is arranged on the inner wall of the guide sleeve (24), the air duct (25) and the guide sleeve (24) are in sliding sealing through the arrangement of the sealing ring, an air suction pump (21) is arranged at the upper end opening of the air duct (25), side plates (20) are symmetrically arranged on the left side and the right side of the air suction pump (21), hydraulic telescopic rods (23) are symmetrically arranged on two sides of the upper end of the, the device is characterized in that a rotary pipe (31) is arranged at the lower end of the air duct (25) in a rotating mode, fan blades (26) are arranged inside the rotary pipe (31) close to the air duct (25), a lower end sealing plate of the rotary pipe (31) is arranged on the outer side of the lower end of the rotary pipe (31), stirring rods are symmetrically arranged on two sides of the rotary pipe (31) above the air injection holes (9), a pressure sensor (10) is arranged at the bottom of the movable inner barrel (16), the pressure sensor (10), an air suction pump (21) and a hydraulic telescopic rod (23) are electrically connected with a control panel (19), the control panel (19) is electrically connected with a storage battery (17), when the device works, under the action of the air suction pump (21), external air enters the movable inner barrel (16) along the air duct (25) and the rotary pipe (31), the air is then ejected from the air injection holes (9) in the rotary pipe (31), and the air entering the, dust in the air can be retained in water, when the air passes through the rotary pipe (31), the fan blades (26) can drive the rotary pipe (31) to rotate, the stirring rod is driven to rotate, the air can be crushed when the stirring rod rotates, so that the contact area of the air and the water is increased, the air washing effect is improved, clean air can be discharged from an exhaust port (2) at the upper left side of the box body (1), the weight of the movable inner barrel (16) is detected through the pressure sensor (10), the weight change of the movable inner barrel (16) is the absorbed dust weight, a flow meter is further arranged on the air duct (25), so that the passing air in unit time is counted, the dust amount in the air is calculated through calculating the dust weight of the air in unit volume, so that the air heavy dust concentration is calculated, when the movable inner barrel (16) is taken out at the later stage, the height of the rotary pipe (31) is adjusted through the extension of the hydraulic telescopic rod (23), thereby causing the rotary pipe (31) to be drawn out of the movable inner cylinder (16).
2. The coal mine dust sampler device according to claim 1, characterized in that a water supplementing tank (3) is arranged on the inner wall of the upper left side of the box body (1), a water supplementing pump is arranged in the water supplementing tank (3), a water supplementing pipe (27) is arranged at the output end of the water supplementing pump, a temperature sensor is further arranged on the water supplementing tank (3), the volatilization speed of water is calculated according to the temperature of the environment where the detection device is located, and then water is supplemented into the movable inner barrel (16) in time, so that the detection error is further reduced, and the sampling accuracy is improved.
3. The coal mine dust sampler device of claim 1 wherein the upper cover (18) is fixedly connected to the box (1) by bolts.
4. A coal mine dust sampler device as claimed in claim 1 wherein the upper end of the rotary tube (31) is provided with a rotary bearing (30) and a sealing ring (29) which cooperate with the air duct (25).
5. The coal mine dust sampler device of claim 1 wherein the pressure sensor (10) is electrically connected to a control panel (19) through a wireless transmission module (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810207301.XA CN108507914B (en) | 2018-03-14 | 2018-03-14 | Coal mine dust sampler device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810207301.XA CN108507914B (en) | 2018-03-14 | 2018-03-14 | Coal mine dust sampler device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108507914A CN108507914A (en) | 2018-09-07 |
| CN108507914B true CN108507914B (en) | 2020-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810207301.XA Expired - Fee Related CN108507914B (en) | 2018-03-14 | 2018-03-14 | Coal mine dust sampler device |
Country Status (1)
| Country | Link |
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| CN (1) | CN108507914B (en) |
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| CN111257183A (en) * | 2020-03-15 | 2020-06-09 | 河北源泷科技有限公司 | Flour production safety inspection alarm device |
| CN112643578A (en) * | 2020-12-15 | 2021-04-13 | 安徽美瑞尔滤清器有限公司 | Clamping device is used in processing of car filter aluminium seat |
| CN113244723B (en) * | 2021-03-24 | 2022-09-13 | 山东天虹纺织有限公司 | Dust control device is used in processing of blending covering yarn |
| CN113697264B (en) * | 2021-08-17 | 2023-04-28 | 福鼎市桑叶白茶科技有限公司 | Mulberry leaf white tea tealeaves management storage device |
| CN114111274A (en) * | 2021-11-17 | 2022-03-01 | 东莞市海诚体育有限公司 | Plastic particle air-drying device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4002441A (en) * | 1975-03-21 | 1977-01-11 | Willard Lewis Johnson | Wash section for air-cleaning device |
| CN2154737Y (en) * | 1993-03-16 | 1994-02-02 | 王继杰 | Air cleaner |
| CN2222000Y (en) * | 1995-01-25 | 1996-03-13 | 张有志 | Fume and dust removing device |
| CN1739843A (en) * | 2004-08-26 | 2006-03-01 | 何景润 | Fume purifier |
| CN206901372U (en) * | 2017-05-12 | 2018-01-19 | 任三三 | A kind of brokenly bubble dust exhaust apparatus |
| CN107617304A (en) * | 2017-11-13 | 2018-01-23 | 董玉罡 | A kind of air cleaning unit |
-
2018
- 2018-03-14 CN CN201810207301.XA patent/CN108507914B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4002441A (en) * | 1975-03-21 | 1977-01-11 | Willard Lewis Johnson | Wash section for air-cleaning device |
| CN2154737Y (en) * | 1993-03-16 | 1994-02-02 | 王继杰 | Air cleaner |
| CN2222000Y (en) * | 1995-01-25 | 1996-03-13 | 张有志 | Fume and dust removing device |
| CN1739843A (en) * | 2004-08-26 | 2006-03-01 | 何景润 | Fume purifier |
| CN206901372U (en) * | 2017-05-12 | 2018-01-19 | 任三三 | A kind of brokenly bubble dust exhaust apparatus |
| CN107617304A (en) * | 2017-11-13 | 2018-01-23 | 董玉罡 | A kind of air cleaning unit |
Non-Patent Citations (1)
| Title |
|---|
| 《煤矿呼吸性粉尘冲击采样器原理与设计探讨》;刘昌凤 等;《中原工学院学报》;20061231;第17卷(第6期);第5-8,22页 * |
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| CN108507914A (en) | 2018-09-07 |
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