CN114264583A - Accurate dust concentration detection device and detection method - Google Patents
Accurate dust concentration detection device and detection method Download PDFInfo
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- CN114264583A CN114264583A CN202111588799.7A CN202111588799A CN114264583A CN 114264583 A CN114264583 A CN 114264583A CN 202111588799 A CN202111588799 A CN 202111588799A CN 114264583 A CN114264583 A CN 114264583A
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- air
- air inlet
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- 239000000428 dust Substances 0.000 title claims abstract description 102
- 238000001514 detection method Methods 0.000 title claims abstract description 67
- 239000012528 membrane Substances 0.000 claims abstract description 45
- 238000010521 absorption reaction Methods 0.000 claims abstract description 35
- 238000005303 weighing Methods 0.000 claims abstract description 13
- 238000007790 scraping Methods 0.000 claims description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- 239000000696 magnetic material Substances 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims 4
- 230000005284 excitation Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The invention discloses a dust detection method, which comprises the following steps: s1, pre-weighing; s2, placing the detection equipment in an environment to be detected, and starting a negative pressure fan to enable the dust-containing air flow to pass through the detection equipment with the filter membrane; s3, counting the air flow flowing out of the equipment; s4, weighing the dust-containing weights of the filter membrane and the dust absorption component, calculating the dust increment, and dividing the dust increment by the air flow to obtain the dust concentration content; the invention also provides an accurate dust concentration detection device which comprises a detection absorption box, wherein the side wall of the detection absorption box is provided with an air inlet, one side of the detection absorption box, which is far away from the air inlet, is provided with an exhaust pipe, and the air inlet is internally and rotatably provided with a cylindrical filter membrane. According to the invention, the intercepted dust is scraped into the collecting cup, so that on one hand, the dust can be directly collected and weighed, thereby avoiding human errors, and on the other hand, the cylindrical filter membrane can be kept in a transparent and clean state, thereby preventing air resistance from forming and reducing the air flow collected by the flowmeter.
Description
Technical Field
The invention relates to the technical field of dust detection, in particular to an accurate dust concentration detection device and a detection method.
Background
When the construction operation is performed in the environment with large dust content such as mines and cement plants, the dust concentration in the environment is often required to be detected so as to prevent dangerous accidents.
At present, the most accurate dust detection is realized by a weighing method, a filter membrane is mainly arranged on detection equipment, dust-containing air passes through the filter membrane by utilizing equipment such as an air pump and the like, the dust is intercepted outside the filter membrane, the air flow is collected by a flowmeter, the mass of the filter membrane before and after interception is weighed to obtain the dust increment, and thus the dust concentration can be calculated. However, in the actual operation process, in the process of weighing the filter membrane before and after the filter membrane is taken down, dust on the filter membrane is easy to fall off to cause unnecessary human errors, and more importantly, when the dust on the filter membrane is excessively accumulated, air resistance is formed, so that the air flow collected by the flow meter is reduced, and the detection result is distorted. In view of this, the present application provides an accurate dust concentration detection apparatus and a detection method.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an accurate dust concentration detection device and a detection method.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dust detection method, comprising the steps of:
s1, pre-weighing, namely weighing the non-dust-absorption weight of a filter membrane and a dust absorption part of the detection equipment;
s2, placing the detection equipment in an environment to be detected, and starting a negative pressure fan to enable the dust-containing air flow to pass through the detection equipment with the filter membrane;
s3, observing a flowmeter on the detection equipment, and counting the air flow passing through the equipment;
and S4, taking down dust-containing components such as the filter membrane and the like, weighing the dust-containing components such as the filter membrane and the dust absorption component, calculating the dust increment, and dividing by the air flow to obtain the dust concentration content.
The invention also provides an accurate dust concentration detection device, which comprises a detection absorption box, wherein the side wall of the detection absorption box is provided with an air inlet, one side of the detection absorption box, which is far away from the air inlet, is provided with an exhaust pipe, the air inlet is internally and rotatably provided with a cylindrical filter membrane, the bottom in the air inlet is provided with a collecting tank, the bottom in the collecting tank is provided with a material collecting cup, the air inlet is internally and slidably connected with a scraper plate, the scraper plate is provided with a lifting device for lifting the scraper plate, the bottom in the detection absorption box is provided with a dust collecting barrel, the dust collecting barrel is internally embedded with an aluminum rod, the aluminum rod is sleeved with a scraping sleeve, the dust collecting barrel is internally provided with a driving device for driving the scraping sleeve to move back and forth, the side wall of the dust collecting barrel is provided with a feed inlet, the dust collecting barrel is internally provided with a dust-proof box, two ends of the dust-proof box are provided with openings, the dust-proof box is internally provided with a piezoelectric sheet, and the dust-proof box is internally provided with a vibration device for vibrating the piezoelectric sheet, the side wall of the detection absorption box is provided with a rotary groove, and a rotating device for rotating the cylindrical filter membrane is arranged in the rotary groove.
Preferably, the lifting device comprises a conductive spring fixedly connected to the scraper, the upper end of the conductive spring is fixedly connected to the inner top of the air inlet, and the piezoelectric plate is electrically connected with the conductive spring through a control circuit.
Preferably, the driving device comprises an excitation coil embedded on the inner wall of the dust collection barrel, the scraping sleeve is made of a magnetic material, and the piezoelectric sheet is electrically connected with the excitation coil through a power supply circuit.
Preferably, the vibration device comprises a knocking rod arranged in the dustproof box in a sliding manner, a telescopic air bag is fixedly connected to the bottom in the dust collection cylinder, the knocking rod is fixedly connected with the telescopic air bag, an impeller is connected to the detection absorption box in the rotating manner, a rotating shaft of the impeller is fixedly connected with a cam, an air storage bag is fixedly arranged on the inner wall of the detection absorption box, and the air storage bag is communicated with the telescopic air bag through an air guide tube.
Preferably, the rotating device comprises two gears which are rotatably connected in the rotary groove, the two gears are meshed, one of the gears is fixedly connected with the rotating shaft of the impeller, and the other gear is fixedly connected with the cylindrical filter membrane through a connecting rod.
The invention has the following beneficial effects:
1. through the arrangement of the rotatable cylindrical filter membrane and the arrangement of the scraper and the lifting device, the scraper on the inner side can be continuously rotated through the cylindrical filter membrane and then scraped up and down under the action of the lifting device, so that the intercepted dust is scraped into the collecting cup, on one hand, the dust can be directly collected and weighed, the human error is avoided, on the other hand, the cylindrical filter membrane can be kept in a transparent and clean state, and the air resistance can not be formed, so that the air flow collected by the flowmeter is reduced;
2. through setting up aluminium pole, piezoelectric patches and vibrating device, can make the piezoelectric patches both ends constantly gather the electric charge to make the aluminium pole response electrification, so can gather a large amount of static charges on the aluminium pole, thereby adsorb the small dust through the cylindric filter membrane, further improve and detect the precision.
Drawings
FIG. 1 is a schematic structural diagram of an accurate dust concentration detection apparatus according to the present invention;
FIG. 2 is a schematic view of the dust collecting container and its internal components;
fig. 3 is a schematic sectional view at a-a in fig. 1.
In the figure: the device comprises a detection absorption box 1, an air inlet 2, a cylindrical filter membrane 3, an air exhaust pipe 4, an impeller 5, a cam 6, an air storage bag 7, an air guide pipe 8, a rotary groove 9, a gear 10, a scraping plate 11, a conductive spring 12, a collecting groove 13, a collecting cup 14, a dust collecting barrel 15, a telescopic air bag 16, a magnet exciting coil 17, a feed inlet 18, an aluminum rod 19, a scraping sleeve 20, a dust-proof box 21, a piezoelectric plate 22 and a knocking rod 23.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The invention provides a dust detection method, which comprises the following steps:
s1, pre-weighing, namely weighing the non-dust-absorption weight of a filter membrane and a dust absorption part of the detection equipment;
s2, placing the detection equipment in an environment to be detected, and starting a negative pressure fan to enable the dust-containing air flow to pass through the detection equipment with the filter membrane;
s3, observing a flowmeter on the detection equipment, and counting the air flow passing through the equipment;
and S4, taking down dust-containing components such as the filter membrane and the like, weighing the dust-containing components such as the filter membrane and the dust absorption component, calculating the dust increment, and dividing by the air flow to obtain the dust concentration content.
Referring to fig. 1-3, the invention further provides an accurate dust concentration detection device, which comprises a detection absorption box 1, an air inlet 2 is arranged on the side wall of the detection absorption box 1, an exhaust pipe 4 is arranged on the side of the detection absorption box 1 far away from the air inlet 2, a cylindrical filter membrane 3 is rotatably arranged in the air inlet 2, a collecting tank 13 is arranged at the bottom in the air inlet 2, a collecting cup 14 is arranged at the bottom in the collecting tank 13, a scraping plate 11 is slidably connected in the air inlet 2, a lifting device for lifting the scraping plate 11 is arranged on the scraping plate 11, a dust collection cylinder 15 is arranged at the bottom in the detection absorption box 1, an aluminum rod 19 is embedded in the dust collection cylinder 15, a scraping sleeve 20 is sleeved on the aluminum rod 19, a driving device for driving the scraping sleeve 20 to move back and forth is arranged in the dust collection cylinder 15, a feed inlet 18 is arranged on the side wall of the dust collection cylinder 15, openings are arranged at both ends of the dust collection cylinder 21, a piezoelectric plate 22 is arranged in the dust collection cylinder 21, a vibration device which can make the piezoelectric sheet 22 vibrate is arranged in the dust-proof box 21, a rotary groove 9 is arranged on the side wall of the detection absorption box 1, and a rotating device which can make the cylindrical filter membrane 3 rotate is arranged in the rotary groove 9.
Elevating gear includes electrically conductive spring 12 of fixed connection on scraper blade 11, and electrically conductive spring 12's upper end fixed connection top in air inlet 2, piezoelectric patch 22 passes through control circuit and electrically conductive spring 12 electric connection. The driving device comprises an excitation coil 17 embedded on the inner wall of the dust collecting cylinder 15, the scraping sleeve 20 is made of a magnetic material, and the piezoelectric sheet 22 is electrically connected with the excitation coil 17 through a power supply circuit. The power supply circuit is coupled with an amplifying circuit, so that the exciting coil 17 is supplied with current with enough intensity, and then stronger magnetism is generated, and the current can act on the magnetic scraping sleeve 20.
Vibrating device is including the striking pole 23 of slip setting in dust-proof box 21, bottom fixedly connected with flexible gasbag 16 in dust collection tube 15, and strike pole 23 and flexible gasbag 16 fixed connection, it is connected with impeller 5 to detect the absorption box 1 internal rotation, impeller 5's pivot fixedly connected with cam 6, it needs to explain, because the radius of cam 6 both sides is not uniform, consequently when impeller 5 drives cam 6 and rotates, then the longer one side of cam 6 can periodically support kinetic energy gas storage bag 7, and gas storage bag 7 adopts soft rubber materials to make, can leave the back in the longer one side of cam 6, can resume under self elastic force, so make gas storage bag 7 periodically expand and contract, and pass through the air duct 8 input flexible gasbag 16 with inside air, and then make flexible gasbag 16 flexible.
The inner wall of the detection absorption box 1 is fixedly provided with an air storage bag 7, and the air storage bag 7 is communicated with a telescopic air bag 16 through an air duct 8. The rotating device comprises two gears 10 which are rotatably connected in the rotary groove 9, the two gears 10 are meshed, one gear 10 is fixedly connected with the rotating shaft of the impeller 5, and the other gear 10 is fixedly connected with the cylindrical filter membrane 3 through a connecting rod.
In the use process of the device, the exhaust tube 4 is connected with the air extraction equipment, the device is placed in the detection environment, after the air extraction equipment is started, the air flow passes through the cylindrical filter membrane 3 in the air inlet 2, and most of dust is intercepted on the outer wall of the cylindrical filter membrane 3.
In the process, the air flow continuously pushes the impeller 5 to rotate, and the cam 6 connected with the rotating shaft of the impeller 5 also rotates along with the impeller, so that the cam 6 periodically extrudes the air storage bag 7, air in the air storage bag 7 periodically enters the telescopic air bag 16 through the air guide pipe 8, the telescopic air bag 16 is periodically stretched, the knocking rod 23 at the upper end of the telescopic air bag 16 continuously pushes up and knocks the piezoelectric plate 22 at the upper side, the piezoelectric plate 22 generates an electric signal, and the control circuit enables the conductive spring 12 to be electrified with pulse current. Meanwhile, the rotating shaft of the impeller 5 drives the cylindrical filter membrane 3 to continuously rotate through the two gears 10 and the connecting rod, and the conductive spring 12 continuously expands and contracts after pulse current is introduced (the conductive spring 12 contracts after current is introduced, and the conductive spring 12 can naturally extend when the current pulse interval period is in a power-off state).
And along with the continuous rotation of cylindric filter membrane 3, can constantly turn to the inboard with the outside, be about to keep the one side of dust and turn to the inboard, and the electrically conductive spring 12 of constantly stretching out and drawing back can promote scraper blade 11 and reciprocate, can scrape the dust on the cylindric filter membrane 3 outer wall into the collecting cup 14 like this to accomplish the collection of dust. Therefore, the dust weight in the collecting cup 14 can be directly weighed, the cylindrical filter membrane 3 can be kept in a clean and transparent state, the air transparent state is kept consistent, air resistance is eliminated, the air flow collected by the flowmeter cannot be reduced, and the detection precision is improved.
Further, when the piezoelectric sheet 22 is vibrated, under the action of the piezoelectric effect, positive and negative charges are gathered to both sides of the piezoelectric sheet 22, and then the aluminum rods 19 arranged at both sides of the piezoelectric sheet 22 induce electrostatic charges gathered at both ends of the piezoelectric sheet 22, and then are also induced to be electrified, so that the end parts of the two aluminum rods 19 induce electrostatic charges with opposite electric properties, and tiny dust in the airflow passing through the cylindrical filter membrane 3 is attracted by the electrostatic charges and adsorbed on the surface of the aluminum rods 19, and in addition, the piezoelectric sheet 22 also leads the excitation coil 17 to be led in an alternating current at intervals through a power supply circuit, when the alternating current is led in, the magnetic pole of the excitation coil 17 generating a magnetic field is changed once, and the magnetic scraping sleeve 20 is attracted and repelled, so that the scraping sleeve 20 can move back and forth once from left to right, thereby the dust adsorbed on the surface of the aluminum rods 19 is scraped, and the scraped dust is gathered together, volume, quality are great, receive the action of gravity great, consequently can not be by air current and electrostatic action and move, so will drop to dust collection tube 15 in, so can be after gathering, weigh the dust weight in the dust collection tube 15 to the dust that makes the collection is more comprehensive, and then improves the detection precision to dust concentration.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A dust detection method is characterized by comprising the following steps:
s1, pre-weighing, namely weighing the non-dust-absorption weight of a filter membrane and a dust absorption part of the detection equipment;
s2, placing the detection equipment in an environment to be detected, and starting a negative pressure fan to enable the dust-containing air flow to pass through the detection equipment with the filter membrane;
s3, observing a flowmeter on the detection equipment, and counting the air flow passing through the equipment;
and S4, taking down dust-containing components such as the filter membrane and the like, weighing the dust-containing components such as the filter membrane and the dust absorption component, calculating the dust increment, and dividing by the air flow to obtain the dust concentration content.
2. An accurate dust concentration detection device comprises a detection absorption box (1) and is characterized in that an air inlet (2) is formed in the side wall of the detection absorption box (1), an exhaust pipe (4) is arranged on one side, far away from the air inlet (2), of the detection absorption box (1), a cylindrical filter membrane (3) is rotationally arranged in the air inlet (2), a collecting tank (13) is arranged at the bottom in the air inlet (2), a collecting cup (14) is arranged at the bottom in the collecting tank (13), a scraper (11) is slidably connected in the air inlet (2), a lifting device for lifting the scraper (11) is arranged on the scraper, a dust collecting barrel (15) is arranged at the bottom in the detection absorption box (1), an aluminum rod (19) is embedded in the dust collecting barrel (15), a scraping sleeve (20) is sleeved on the aluminum rod (19), and a driving device for driving the scraping sleeve (20) to move back and forth is arranged in the dust collecting barrel (15), the dust collection device is characterized in that a feeding hole (18) is formed in the side wall of the dust collection cylinder (15), a dust prevention box (21) is arranged in the dust collection cylinder (15), openings are formed in two ends of the dust prevention box (21), a piezoelectric sheet (22) is arranged in the dust prevention box (21), a vibrating device for vibrating the piezoelectric sheet (22) is arranged in the dust prevention box (21), a rotary groove (9) is formed in the side wall of the detection absorption box (1), and a rotating device for rotating the cylindrical filter membrane (3) is arranged in the rotary groove (9).
3. The accurate dust concentration detection device according to claim 2, wherein the lifting device comprises a conductive spring (12) fixedly connected to the scraper (11), the upper end of the conductive spring (12) is fixedly connected to the inner top of the air inlet (2), and the piezoelectric plate (22) is electrically connected to the conductive spring (12) through a control circuit.
4. The dust concentration detecting apparatus according to claim 2, wherein the driving means includes an exciting coil (17) embedded in an inner wall of the dust collecting tube (15), the scraping sleeve (20) is made of a magnetic material, and the piezoelectric plate (22) is electrically connected to the exciting coil (17) through a power supply circuit.
5. The accurate dust concentration detection device according to claim 2, wherein the vibration device comprises a knocking rod (23) slidably arranged in the dust-proof box (21), the bottom of the dust collection cylinder (15) is fixedly connected with a telescopic air bag (16), the knocking rod (23) is fixedly connected with the telescopic air bag (16), the detection absorption box (1) is rotatably connected with an impeller (5), a rotating shaft of the impeller (5) is fixedly connected with a cam (6), the inner wall of the detection absorption box (1) is fixedly provided with an air storage bag (7), and the air storage bag (7) is communicated with the telescopic air bag (16) through an air duct (8).
6. An accurate dust concentration detection device according to claim 5, characterized in that the rotating device comprises two gears (10) rotatably connected in the rotary groove (9), the two gears (10) are engaged, one gear (10) is fixedly connected with the rotating shaft of the impeller (5), and the other gear (10) is fixedly connected with the cylindrical filter membrane (3) through a connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111588799.7A CN114264583A (en) | 2021-12-23 | 2021-12-23 | Accurate dust concentration detection device and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111588799.7A CN114264583A (en) | 2021-12-23 | 2021-12-23 | Accurate dust concentration detection device and detection method |
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| Publication Number | Publication Date |
|---|---|
| CN114264583A true CN114264583A (en) | 2022-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111588799.7A Pending CN114264583A (en) | 2021-12-23 | 2021-12-23 | Accurate dust concentration detection device and detection method |
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| CN (1) | CN114264583A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115522978A (en) * | 2022-09-23 | 2022-12-27 | 中煤科工集团重庆研究院有限公司 | Dust concentration detection method and device |
| CN115541438A (en) * | 2022-12-02 | 2022-12-30 | 沛县格桑电子有限公司 | Portable multi-environment atmospheric environmental pollution detector and use method thereof |
-
2021
- 2021-12-23 CN CN202111588799.7A patent/CN114264583A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115522978A (en) * | 2022-09-23 | 2022-12-27 | 中煤科工集团重庆研究院有限公司 | Dust concentration detection method and device |
| CN115522978B (en) * | 2022-09-23 | 2024-03-12 | 中煤科工集团重庆研究院有限公司 | Dust concentration detection method and device |
| CN115541438A (en) * | 2022-12-02 | 2022-12-30 | 沛县格桑电子有限公司 | Portable multi-environment atmospheric environmental pollution detector and use method thereof |
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Application publication date: 20220401 |
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