CN108362617B - Device and method for detecting mineral fibers in air of workplace - Google Patents
Device and method for detecting mineral fibers in air of workplace Download PDFInfo
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- CN108362617B CN108362617B CN201810184418.0A CN201810184418A CN108362617B CN 108362617 B CN108362617 B CN 108362617B CN 201810184418 A CN201810184418 A CN 201810184418A CN 108362617 B CN108362617 B CN 108362617B
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- 239000002557 mineral fiber Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 239000002344 surface layer Substances 0.000 claims abstract description 41
- 239000000835 fiber Substances 0.000 claims abstract description 33
- 238000011161 development Methods 0.000 claims abstract description 24
- 238000009877 rendering Methods 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000001179 sorption measurement Methods 0.000 claims abstract description 9
- 238000004062 sedimentation Methods 0.000 claims description 30
- 230000010355 oscillation Effects 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
- 239000002313 adhesive film Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000470 constituent Substances 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
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 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
- G01N15/0612—Optical scan of the deposits
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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)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a device and a method for detecting mineral fibers in air of a workplace, wherein the detection device comprises: subside chamber and set up intake pipe and the outlet duct at subside chamber both ends, the intake pipe passes through an air pump and connects the fine mouth of collection, subsides the chamber and includes the both sides wall of a set of planar structure that sets up relatively at least, is first lateral wall and second lateral wall respectively, and first lateral wall internal surface is attached to have white color rendering surface layer and black color rendering surface layer, and the second lateral wall outside still is equipped with the camera, and the camera is towards white color rendering surface layer and black color rendering surface layer. By using the fiber adhesion liquid, the air containing the mineral fibers is sent into the liquid settling tube for particle adsorption, so that the solid in the air can be completely adsorbed by the fiber adhesion liquid. The liquid absorbing the mineral fibers can be settled on the color development plate or suspended in the liquid, and the whole quantity is calculated and calculated in a mode of manual counting by photographing of the camera.
Description
Technical Field
The invention relates to a device and a method for detecting mineral fibers in air of a workplace.
Background
The mine enterprises, especially the workplaces related to the processing, transportation and other processes of mineral fiber products such as asbestos, and the like, can suspend a certain amount of mineral fibers in the air. The workplace filled with mineral fibers will have an adverse effect on the health of the workers located therein. In the process of determining whether the mineral fiber contact concentration of a workplace reaches the standard or what protective measures need to be taken, detection equipment is needed for detection. There is therefore a need for a detection kit for detecting mineral fibers at a workplace.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a device and a method for detecting mineral fibers in air of a workplace.
In order to achieve the purpose, the invention adopts a technical scheme that: an apparatus for detecting mineral fibers in workplace air comprising: subside chamber and setting are in the intake pipe and the outlet duct at subside chamber both ends, the intake pipe passes through an air pump and connects the fine mouth of collection, subside the chamber and include a set of relative planar structure's that sets up both sides wall at least, be first lateral wall and second lateral wall respectively, first lateral wall internal surface is attached to have white color rendering surface layer and black color rendering surface layer, the second lateral wall outside still is equipped with the camera, the camera orientation white color rendering surface layer with black color rendering surface layer.
In a preferred embodiment of the present invention, a light source is disposed between the first sidewall and the second sidewall, and a light irradiation direction of the light source is parallel to a sidewall plane.
In a preferred embodiment of the invention, a support is arranged at one end of the settling chamber close to the air inlet pipe, and the support is connected with the end part of the settling chamber through a rotating shaft.
In a preferred embodiment of the invention, a foot pad is arranged at one end of the sedimentation chamber close to the air outlet pipe, and the foot pad and the support can keep the first side face in a horizontal state when being simultaneously arranged on the water surface.
In a preferred embodiment of the present invention, the air inlet pipe and the air outlet pipe are both provided with control valves.
In a preferred embodiment of the present invention, the settling chamber is further provided with a filling opening.
The other technical scheme adopted by the invention is as follows: a method of detection using a workplace airborne mineral fiber detection apparatus, comprising the steps of:
(1) place detection device in and wait to detect the place, make the vertical setting of subsidence chamber and the subsidence chamber tip that the intake pipe corresponds be located the lower part, to packing into fibre adhesion liquid in the liquid adsorption pipe, then open control valve and air pump, make the air current pass through in proper order: the fiber collecting port, the air inlet pipe, the sedimentation cavity and the air outlet pipe; then the air pump is kept in the air suction state for a period of time;
(2) oscillating the settling chamber for a period of time to keep the liquid in the liquid adsorption tube in a turbid state, and keeping the settling chamber in a horizontal state after oscillation is finished;
(3) and (3) after the step (2) is finished, enabling the settling chamber to be horizontally stood for a period of time, respectively shooting fiber photos right above the white color-rendering surface layer and the black color-rendering surface layer through a camera, and then calculating the concentration of the mineral fibers in the air by identifying the number and the length of the mineral fibers in the amplified photos.
In a preferred embodiment of the present invention, the fibers directly above the white color-displaying layer or the black color-displaying layer are: the fiber is positioned in the liquid above the white color development surface layer or the black color development surface layer.
In a preferred embodiment of the present invention, when the sedimentation chamber is kept horizontal after the oscillation in step (2), the sedimentation chamber is deflected by a hand to transfer the bubbles inside the sedimentation chamber to the air inlet pipe or/and the air outlet pipe.
In a preferred embodiment of the present invention, a light source is disposed between the first sidewall and the second sidewall, and a light ray of the light source is perpendicular to an optical axis of the camera lens.
The invention solves the defects in the background technology, and has the following beneficial effects:
(1) by using the fiber adhesion liquid, the air containing the mineral fibers is sent into the liquid settling tube for particle adsorption, so that the solid in the air can be completely adsorbed by the fiber adhesion liquid. The phenomenon of missing detection is avoided. The fiber adhering liquid in the settling tube may be water or an organic solvent. And finally, the mineral fibers can be settled on the color development plate or suspended in the liquid, the images are taken by a camera and amplified on a display screen, and the whole quantity is calculated and calculated by adopting a manual counting mode in unit square centimeter area.
(2) The white color development surface layer and the black color development surface layer respectively provide background colors with strong color development contrast, ensure that mineral fibers of all colors can be identified by images, ensure that the fibers can not be missed in large batch in the counting process (the fibers can be respectively identified by comparing the proportions of the colors of the medium fibers of the black and white color development surface layers)
(3) By using the support with the rotating shaft, the sedimentation cavity can be kept in a vertical state when the detection device is in a state of adsorbing mineral fibers, so that the long strip-shaped sedimentation cavity can be kept in a vertical state, the passing time of gas in liquid can be kept to be longest, and the optimal adhesion to the mineral fibers is ensured; the support can let the chamber of subsiding keep the horizontality with the cooperation of stepping up the foot, lets the liquid level can find the shortest liquid degree of depth when the camera is shot like this, guarantees to shoot in the picture can be clear all carry out the video picture to in the liquid and the mineral fiber on color rendering surface layer surface, provides clear image for follow-up artifical count mineral fiber quantity.
(4) The cross section of the sedimentation cavity is rectangular, and the first side face and the second side face are two opposite long edges of the rectangle, so that the thickness of liquid between the first side face and the second side face is ensured to be minimum, and the camera is convenient to image.
(5) The white color-developing surface layer and the black color-developing surface layer can be respectively white and black adhesive films and are attached to the inner wall of the first side surface.
(6) The light of light source is basically on a parallel with white color development surface course and black color development surface course, can provide the light filling for the camera like this, provides better light source environment for the camera to mineral fiber's video picture.
Drawings
The invention is further explained below with reference to the figures and examples;
FIG. 1 is a schematic structural diagram of a detection device according to a preferred embodiment of the present invention for adsorbing mineral fibers in air;
FIG. 2 is a schematic structural diagram of a detection device for detecting mineral fibers in air according to a preferred embodiment of the present invention;
in the figure: 1. a settling chamber; 2. an air inlet pipe; 3. an air outlet pipe; 4. an air pump; 5. a control valve; 6. a fiber collecting port; 7. a liquid filling port; 8. a support; 9. a rotating shaft; 10. a foot pad; 11. a white color-developing surface layer; 12. a black color-developing surface layer; 13. a camera; 14. a light source.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings and examples, which are simplified schematic drawings and illustrate only the basic structure of the invention in a schematic manner, and thus show only the constituents relevant to the invention.
As shown in fig. 1 and 2, an apparatus for detecting mineral fibers in air of a workplace comprises: the sedimentation chamber 1 and set up intake pipe 2 and outlet duct 3 at sedimentation chamber 1 both ends, intake pipe 2 connects collection fine mouth 6 through an air pump 4, and sedimentation chamber 1 includes the both sides wall of a set of planar structure that sets up relatively at least, is first lateral wall and second lateral wall respectively. By using the fiber adhesion liquid, the air containing the mineral fibers is sent into the liquid settling tube for particle adsorption, so that the solid in the air can be completely adsorbed by the fiber adhesion liquid. The phenomenon of missing detection is avoided. The fiber adhering liquid in the settling tube may be water or an organic solvent. And finally, the mineral fibers can be settled on the color development plate or suspended in the liquid, the images are taken by a camera and amplified on a display screen, and the whole quantity is calculated and calculated by adopting a manual counting mode in unit square centimeter area.
The inner surface of the first side wall is adhered with a white color-rendering surface layer 11 and a black color-rendering surface layer 12, the outer side of the second side wall is also provided with a camera 13, and the camera 13 faces the white color-rendering surface layer 11 and the black color-rendering surface layer 12. White color development surface course 11 and black color development surface course 12 through providing the strong background color of color development contrast respectively, guarantee that all colored mineral fiber homoenergetic can be discerned by the image, guarantee that the fibre can not appear the condition of missing note in a large batch in the counting process (through the proportion of the well fibre colour of two color development surface courses of contrast black and white, can discern respectively). The white color-developing surface layer 11 and the black color-developing surface layer 12 may be white and black adhesive films, respectively, attached to the inner wall of the first side surface.
A light source 14 is arranged between the first side wall and the second side wall, and the light irradiation direction of the light source 14 is parallel to the plane of the side walls. The light of the light source 14 is substantially parallel to the white color-rendering layer 11 and the black color-rendering layer 12, so that the light supplement can be provided for the camera 13, and a better light source 14 environment can be provided for the camera 13 to display the mineral fibers.
Subside chamber 1 and be close to 2 one ends of intake pipe and be equipped with support 8, support 8 connects through pivot 9 and subsides 1 tip in chamber, subsides chamber 1 and is close to 3 one ends of outlet duct and is equipped with pad foot 10, and when pad foot 10 and support 8 set up on the surface of water simultaneously, it can keep first side in the horizontality. By using the support 8 with the rotating shaft 9, the sedimentation cavity 1 can be kept in a vertical state when the detection device is in a state of adsorbing mineral fibers, so that the long-strip-shaped sedimentation cavity 1 can be kept in a vertical state, the passing time of gas in liquid can be kept longest, and the optimal adhesion to the mineral fibers is ensured; the support 8 can let the chamber of subsiding 1 and keep the horizontality with the cooperation of pad foot 10, lets the liquid level can find the shortest liquid degree of depth when camera 13 shoots like this, guarantees to shoot in the picture can be clear in the liquid and the development surface layer surface mineral fibre all carry out the video picture, provides clear image for follow-up artifical count mineral fibre quantity.
The air inlet pipe 2 and the air outlet pipe 3 are both provided with control valves 5, the sedimentation chamber 1 is also provided with a liquid adding port 7, and the liquid adding port 7 can provide liquid supplement for the sedimentation chamber 1 at any time.
The other technical scheme adopted by the invention is as follows: a method of detection using a workplace airborne mineral fiber detection apparatus, comprising the steps of:
(1) place detection device in and wait to detect the place, make 1 vertical setting in sedimentation chamber and the sedimentation chamber 1 tip that intake pipe 2 corresponds be located the lower part, to packing into fibre adhesion liquid in the liquid adsorption tube, then open control valve 5 and air pump 4, make the air current pass through in proper order: the device comprises a fiber collecting port 6, an air inlet pipe 2, a sedimentation cavity 1 and an air outlet pipe 3; then the air pump 4 is kept in the air suction state for a certain period of time;
(2) oscillating the settling chamber 1 for a period of time to keep the liquid in the liquid adsorption tube in a turbid state, and keeping the settling chamber 1 in a horizontal state after oscillation is finished;
(3) and (3) after the step (2) is finished, horizontally standing the sedimentation cavity 1 for a period of time, respectively shooting fiber photos right above the white color-rendering surface layer 11 and the black color-rendering surface layer 12 through a camera 13, and then calculating the concentration of the mineral fibers in the air by identifying the number and the length of the mineral fibers in the enlarged photos.
The fibers directly above the white color-developing surface layer 11 or the black color-developing surface layer 12 are: mineral fibers on the surface of the white color-developing layer 11 or the black color-developing layer 12, and fibers in the liquid above the white color-developing layer 11 or the black color-developing layer 12.
And (3) when the sedimentation chamber 1 is kept in a horizontal state after the oscillation in the step (2) is finished, deflecting the sedimentation chamber 1 by hand to transfer bubbles in the sedimentation chamber into the air inlet pipe 2 or/and the air outlet pipe 3.
Be equipped with light source 14 between first lateral wall and the second lateral wall, light source 14 is the bar structure that extends along settling chamber 1 length direction, is provided with the LED lamp pearl that a plurality of evenly arranged along length direction on bar structure's light source 14. The light of the light source 14 is perpendicular to the optical axis of the lens of the camera 13. The cross section of the sedimentation chamber 1 is rectangular, and the first side face and the second side face are two opposite long sides of the rectangle, so that the thickness of liquid between the first side face and the second side face is ensured to be minimum, and the camera 13 is convenient to image.
In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. An apparatus for detecting mineral fibers in workplace air comprising: the fiber collecting device comprises a settling chamber, and an air inlet pipe and an air outlet pipe which are arranged at two ends of the settling chamber, and is characterized in that the air inlet pipe is connected with a fiber collecting port through an air pump, the settling chamber at least comprises a group of two side walls of a plane structure which are oppositely arranged, the two side walls are a first side wall and a second side wall respectively, a white color development surface layer and a black color development surface layer are attached to the inner surface of the first side wall, a camera is further arranged on the outer side of the second side wall, and the camera faces towards the white color development surface layer and the black color development surface layer;
a light source is arranged between the first side wall and the second side wall, and the light irradiation direction of the light source is parallel to the plane of the side wall;
the detection method of the detection device comprises the following steps:
(1) place detection device in and wait to detect the place, make the vertical setting of subsidence chamber and the subsidence chamber tip that the intake pipe corresponds be located the lower part, to packing into fibre adhesion liquid in the liquid adsorption pipe, then open control valve and air pump, make the air current pass through in proper order: the fiber collecting port, the air inlet pipe, the sedimentation cavity and the air outlet pipe; then the air pump is kept in the air suction state for a period of time;
(2) oscillating the settling chamber for a period of time to keep the liquid in the liquid adsorption tube in a turbid state, and keeping the settling chamber in a horizontal state after oscillation is finished;
(3) and (3) after the step (2) is finished, enabling the settling chamber to be horizontally stood for a period of time, respectively shooting fiber photos right above the white color-rendering surface layer and the black color-rendering surface layer through a camera, and then calculating the concentration of the mineral fibers in the air by identifying the number and the length of the mineral fibers in the amplified photos.
2. The apparatus for detecting mineral fibers in air at a workplace of claim 1, wherein: the sedimentation chamber is provided with a support at one end close to the air inlet pipe, and the support is connected with the end part of the sedimentation chamber through a rotating shaft.
3. The apparatus for detecting mineral fibers in air at a workplace of claim 2, wherein: and when the pad and the support are simultaneously arranged on a horizontal plane, the first side face can be kept in a horizontal state.
4. The apparatus for detecting mineral fibers in air at a workplace of claim 1, wherein: and the air inlet pipe and the air outlet pipe are both provided with control valves.
5. The apparatus for detecting mineral fibers in air at a workplace of claim 1, wherein: and a liquid adding opening is also formed in the sedimentation cavity.
6. The apparatus for detecting mineral fibers in air at a workplace of claim 1, wherein: the fibers right above the white color development surface layer or the black color development surface layer are as follows: the fiber is positioned in the liquid above the white color development surface layer or the black color development surface layer.
7. The apparatus for detecting mineral fibers in air at a workplace of claim 1, wherein: and (3) when the sedimentation cavity is kept in a horizontal state after the oscillation in the step (2) is finished, the sedimentation cavity is deflected by a hand, so that the bubbles in the sedimentation cavity are transferred to the air inlet pipe or/and the air outlet pipe.
8. The apparatus for detecting mineral fibers in air at a workplace of claim 1, wherein: and a light source is arranged between the first side wall and the second side wall, and the light of the light source is vertical to the optical axis of the camera lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810184418.0A CN108362617B (en) | 2018-03-07 | 2018-03-07 | Device and method for detecting mineral fibers in air of workplace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810184418.0A CN108362617B (en) | 2018-03-07 | 2018-03-07 | Device and method for detecting mineral fibers in air of workplace |
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| Publication Number | Publication Date |
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| CN108362617A CN108362617A (en) | 2018-08-03 |
| CN108362617B true CN108362617B (en) | 2021-01-22 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6005662A (en) * | 1996-11-04 | 1999-12-21 | Certainteed Corporation | Apparatus and method for the measurement and separation of airborne fibers |
| CN105091754A (en) * | 2015-04-08 | 2015-11-25 | 天津科技大学 | Portable cost-effective fiber analyzer |
| CN105869180A (en) * | 2016-06-06 | 2016-08-17 | 瑞辰星生物技术（广州）有限公司 | System and method for obtaining image of granular stickies in papermaking pulp fluid |
| CN107091902A (en) * | 2017-03-20 | 2017-08-25 | 浙江必测节能科技有限公司 | The detection method and detection means of air quality |
-
2018
- 2018-03-07 CN CN201810184418.0A patent/CN108362617B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6005662A (en) * | 1996-11-04 | 1999-12-21 | Certainteed Corporation | Apparatus and method for the measurement and separation of airborne fibers |
| CN105091754A (en) * | 2015-04-08 | 2015-11-25 | 天津科技大学 | Portable cost-effective fiber analyzer |
| CN105869180A (en) * | 2016-06-06 | 2016-08-17 | 瑞辰星生物技术（广州）有限公司 | System and method for obtaining image of granular stickies in papermaking pulp fluid |
| CN107091902A (en) * | 2017-03-20 | 2017-08-25 | 浙江必测节能科技有限公司 | The detection method and detection means of air quality |
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| CN108362617A (en) | 2018-08-03 |
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