CN112014285A - Light path joint of direct-reading dust concentration measuring instrument - Google Patents
Light path joint of direct-reading dust concentration measuring instrument Download PDFInfo
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- CN112014285A CN112014285A CN202010881501.0A CN202010881501A CN112014285A CN 112014285 A CN112014285 A CN 112014285A CN 202010881501 A CN202010881501 A CN 202010881501A CN 112014285 A CN112014285 A CN 112014285A
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- 239000000428 dust Substances 0.000 title claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 52
- 230000003287 optical effect Effects 0.000 claims abstract description 29
- 230000001154 acute effect Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 description 3
- 238000009795 derivation Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
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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
-
- 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
- G01N15/075—Investigating concentration of particle suspensions by optical means
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- 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 an optical path joint of a direct-reading dust concentration measuring instrument, which comprises a joint body detachably connected with a detection box of the measuring instrument and a light beam eduction tube arranged at the end part of the joint body, wherein a light beam emitter is detachably arranged in the joint body, the light beam emitting part of the light beam emitter is aligned with the light beam eduction tube, and the light beam emitting end surface of the light beam eduction tube is obliquely arranged from outside to inside.
Description
Technical Field
The invention belongs to the field of dust concentration measurement, and particularly relates to an optical path joint of a direct-reading dust concentration measuring instrument.
Background
As is well known, dust is highly hazardous, and pneumoconiosis caused by long-term inhalation of high-concentration dust is the most common occupational disease; toxic elements such as lead, cadmium, arsenic, manganese and the like contained in the dust are dissolved in respiratory tracts and absorbed into blood circulation to cause poisoning; light dust such as hair dust, cotton dust and the like is easy to adhere to mucous membranes of nasal cavities, tracheas and bronchus when being inhaled into respiratory tracts, and chronic inflammation is caused by long-term local stimulation and continuous infection. In addition, the dust can cause eye diseases, skin diseases, etc., and the dust also has carcinogenic effect, especially lung cancer. Meanwhile, for industries which are easy to generate dust in the production process, such as coal mines, cement and flour processing enterprises, pharmaceutical and chemical industries and the like, the potential safety hazard that the dust concentration in the air tends to be saturated and explosion occurs under the condition of meeting static electricity or open fire exists. Therefore, dust detection is required for workplaces from the viewpoint of production safety and from the viewpoint of physical health of protection workers.
At present, also appear a lot of direct-reading formula dust concentration measurement appearance in the market, the on-the-spot gas sampling of carrying on to pass through the shining of light beam in one side of sampling channel, if there is the dust granule in the gas, will produce photic refraction or reflection, at this moment, through the refraction or the reflection signal who receives light, can judge the content of dust granule in the gas, and then reachs the testing result.
However, the existing light beam emitters are all connected to the detection box through the optical path joint, wherein the optical path joint is detachably connected to the detection box, the flow direction of the detection gas in the optical path joint and the detection box is perpendicular to the flow direction, the light beam end surface of the optical path joint is a plane perpendicular to the bottom surface of the detection box, and the light beam is emitted from the light beam end surface and directly irradiates onto the detection gas.
It is obvious that the optical connector has a significant drawback that, since the light beam is emitted from the end face of the light beam, some light beam is inevitably refracted at the end face towards the light beam receiver, so that both the refracted light beam and the refracted or reflected dust particles are received by the light beam receiver, and therefore, the detection result has a certain deviation.
Disclosure of Invention
The invention aims to provide an improved optical path joint of a direct-reading dust concentration measuring instrument.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a direct-reading dust concentration measuring apparatu's light path connects, it includes the joint body that can dismantle the connection with the detection box of measuring apparatu, set up the light beam eduction tube at connecting this tip, wherein light beam transmitter detachably installs in connecting this body, the position is penetrated to the light beam of light beam transmitter aligns with the light beam eduction tube, and the light beam terminal surface outside-in slope of light beam eduction tube sets up, when light beam eduction tube and detection box location, the front end that goes out the light beam terminal surface can block to penetrate the light beam receiver refraction of light beam to the location on detecting the box.
Preferably, the angle formed by the end face of the light beam and the horizontal plane is acute.
Specifically, the included angle formed by the end face of the light beam and the horizontal plane is 30-60 degrees. In this example 45. In this case, the output of the anti-refraction beam is optimized, and the actual processing is facilitated.
According to a specific implementation and preferred aspect of the invention, the light beam receiver is located above the detection area formed by the detection box, and when the light beam outlet pipe and the detection box are positioned, the light beam receiver is located above the side of the light beam outlet pipe, and the light beam outlet end face is obliquely arranged from top to bottom and from outside to inside. In this way, the light beam refracted upward from the end surface of the light beam leading-out tube is blocked, thereby reducing the detection error.
According to a specific implementation and preferable aspect of the invention, the connector body is provided with external threads on the periphery thereof, the detection box is correspondingly provided with a threaded hole and a through hole, the connector body is in threaded fit connection with the threaded hole, and the light beam outlet pipe extends into a detection area formed by the detection box from the through hole. The adoption screw-thread fit is on the one hand be convenient for equipment and change, and on the other hand is convenient for fix a position back and is gone out the angle control of beam end face and beam receiver, ensures that the beam of leading out the tube end face from the light beam upwards refraction is blockked.
Here, it should be noted that: when connecting the body and screw hole cooperation location, the terminal surface that connects the body is contradicted on detecting the box, that is to say, through the settlement of pitch, when connecting the unable rotation of body, explains that the installation has put in place, and at this moment, light beam receiver is located light beam derivation pipe side top, and goes out the inclined setting of light beam terminal surface top-down outside-in.
Preferably, the joint body is internally provided with a mounting cavity, and the light beam emitter is plugged into the mounting cavity. The light beam emitter is convenient to assemble and disassemble.
Furthermore, the end part of the light beam emitter far away from the light beam emitting part emerges out of the joint body. This makes it easier to implement the beam emitter assembly and disassembly.
Furthermore, the optical connector also comprises a connecting cap used for fixedly connecting the emergent end of the light beam emitter with the connector body. Prevent the optical beam emitter from moving with respect to the optical path connector.
Specifically, the connecting cap is a conventional screw cap and is provided with two groups of internal threads, and one group of internal threads is matched with the external threads of the joint body; the other set is threadably engaged with the exposed end of the beam emitter.
In addition, the surfaces of the light beam leading-out tube, the detection box and the joint body are black. The interference of external light to the light beam is prevented, the scattering of the light beam can be effectively prevented, and the accuracy of the detection result is further ensured.
Preferably, the center of the beam exit portion of the beam projector is aligned with the center of the beam delivery tube. Therefore, the emitting angle of the light beam is optimal, and the accuracy of the detection result is better facilitated.
Due to the implementation of the technical scheme, compared with the prior art, the invention has the following advantages:
the light beam outgoing end face of the light beam outgoing pipe is obliquely arranged, so that the emitted light beam is prevented from being refracted to the light beam receiver positioned on the detection box, the accuracy of dust concentration detection is improved, and meanwhile, the structure is simple, the implementation is convenient, and the cost is low.
Drawings
FIG. 1 is a schematic front view of an optical connector of the present invention mounted on a test cassette;
FIG. 2 is a schematic sectional view taken along line A-A in FIG. 1;
FIG. 3 is a schematic sectional view taken along line B-B in FIG. 1;
FIG. 4 is a schematic front view of the optical circuit junction of the present invention;
wherein: 1. a detection cartridge; 1a, a threaded hole; 1b, inserting holes;
2. an optical path joint; 20. a connector body; a. a thread; 21. a light beam delivery pipe; m, light beam emitting end face; 22. a connecting cap;
3. a light beam emitter; 30. a light beam emitting portion; b. a thread;
4. a light beam receiver.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacted with the first and second features, or indirectly contacted with the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
As shown in fig. 1 to 3, the direct-reading dust concentration measuring instrument includes a detection box 1, an optical path connector 2 and a light beam emitter 3 which are detached from the detection box 1, and a light beam receiver 4 disposed above a detection area formed by the detection box 1.
The optical connector 2 comprises a connector body 20 detachably connected with the detection box 1 of the measuring instrument, and a light beam eduction tube 21 arranged at the end part of the connector body 20.
In this example, the joint body 20 is formed with a mounting cavity therein, and the light beam emitter 3 is plugged into the mounting cavity. The light beam emitter is convenient to assemble and disassemble.
The end of the light beam emitter 3 far away from the light beam emitting part 30 protrudes out of the connector body 20, and the optical connector 2 further comprises a connecting cap 22 for fixedly connecting the protruding end of the light beam emitter 3 with the connector body 20. This makes it easier to assemble and disassemble the light beam emitter and prevents the light beam emitter from being confused with the optical path connector.
In this embodiment, the connector body 20 has a thread a on its outer periphery, the detection box 1 has a corresponding threaded hole 1a and a corresponding insertion hole 1b, the connector body 20 is connected to the threaded hole 1a in a threaded manner, and the light beam outgoing tube 21 extends into the detection area formed by the detection box from the insertion hole 1 b.
The light beam end surface m of the light beam outgoing pipe 21 is obliquely arranged from outside to inside, and when the light beam outgoing pipe 21 is positioned with the detection box 1, the front end part of the light beam outgoing end surface m can prevent the outgoing light beam from being refracted to the light beam receiver 4 positioned on the detection box 1.
Referring to fig. 4, the angle formed by the light beam-emitting end surface m and the horizontal plane is 30 to 60 °. In this example 45. In this case, the output of the anti-refraction beam is optimized, and the actual processing is facilitated.
The connecting cap 22 is a conventional screw cap and has two sets of internal threads, one set mating with the external peripheral threads a of the joint body 20; the other set mates with the exposed end threads b of the beam emitter 3.
The center of the beam exit portion 30 of the beam emitter 3 is aligned with the center of the beam delivery tube 21. Therefore, the emitting angle of the light beam is optimal, and the accuracy of the detection result is better facilitated.
In this embodiment, when the light beam outgoing tube 21 and the detecting box 1 are positioned, the light beam receiver 4 is located above the side of the light beam outgoing tube 21, and the light beam outgoing end surface m is inclined from top to bottom and from outside to inside. In this way, the light beam refracted upward from the end surface of the light beam leading-out tube is blocked, thereby reducing the detection error.
Here, it should be noted that: when connecting the body and screw hole cooperation location, the terminal surface that connects the body is contradicted on detecting the box, that is to say, through the settlement of pitch, when connecting the unable rotation of body, explains that the installation has put in place, and at this moment, light beam receiver is located light beam derivation pipe side top, and goes out the inclined setting of light beam terminal surface top-down outside-in.
The surfaces of the light beam outgoing tube 21, the detection box 1, and the joint body 20 are black. The interference of external light to the light beam is prevented, the scattering of the light beam can be effectively prevented, and the accuracy of the detection result is further ensured.
Therefore, the present embodiment has the advantages of:
1) the light beam end face of the light beam outgoing pipe is inclined, the light beam outgoing is prevented from being refracted to the light beam receiver positioned on the detection box, the accuracy of dust concentration detection is improved, and meanwhile, the dust concentration detection device is simple in structure and convenient to implement and is low in cost.
2) When the light path joint is installed in place, the light beam emitting end face is inclined from top to bottom from outside to inside, and therefore assembly of each component is facilitated.
3) The surfaces of the optical path joints are black, so that the interference of external light to light beams is prevented, the scattering of the light beams can be effectively prevented, and the accuracy of detection results is further ensured.
The present invention has been described in detail in order to enable those skilled in the art to understand the invention and to practice it, and it is not intended to limit the scope of the invention, and all equivalent changes and modifications made according to the spirit of the present invention should be covered by the present invention.
Claims (10)
1. The utility model provides a direct-reading dust concentration measuring apparatu's light path connects, its includes with the detection box detachable connection of measuring apparatu connect the body, set up and be in connect this end of body's light beam eduction tube, wherein light beam transmitter detachably installs connect this internal, its characterized in that: when the light beam outgoing pipe and the detection box are positioned, the front end part of the light beam outgoing end face can prevent the outgoing light beam from being refracted to a light beam receiver positioned on the detection box.
2. The optical path joint of the direct-reading dust concentration measuring instrument according to claim 1, wherein: the included angle formed by the end face of the light beam and the horizontal plane is an acute angle.
3. The optical path joint of the direct-reading dust concentration measuring instrument according to claim 2, wherein: the included angle formed by the end face of the light beam and the horizontal plane is 30-60 degrees.
4. The optical path joint of the direct-reading dust concentration measuring instrument according to claim 1, wherein: the light beam receiver is positioned above a detection area formed by the detection box, when the light beam eduction tube and the detection box are positioned, the light beam receiver is positioned above the side of the light beam eduction tube, and the light beam end surface is obliquely arranged from top to bottom from outside to inside.
5. The optical path joint of the direct-reading dust concentration measuring instrument according to claim 1, wherein: the connector body periphery be equipped with the external screw thread, the detection box on correspond and be equipped with screw hole and interlude hole, the connector body with screw hole screw-thread fit connects, the light beam contact tube from the interlude hole stretches into the detection zone that the detection box formed.
6. The optical path joint of the direct-reading dust concentration measuring instrument according to claim 5, wherein: the connector body is internally provided with a mounting cavity, and the light beam emitter is plugged into the mounting cavity in a plugging mode.
7. The optical path joint of the direct-reading dust concentration measuring instrument according to claim 6, wherein: the end part of the light beam emitter, which is far away from the light beam emitting part, emits out of the joint body.
8. The optical path joint of the direct-reading dust concentration measuring instrument according to claim 7, wherein: the optical connector also comprises a connecting cap which is used for fixedly connecting the emergent end part of the light beam emitter with the connector body.
9. The optical path joint of the direct-reading dust concentration measuring instrument according to claim 1, wherein: the surfaces of the light beam eduction tube, the detection box and the joint body are black.
10. The optical path joint of the direct-reading dust concentration measuring instrument according to claim 1, wherein: the center of the light beam emitting part of the light beam emitter is aligned with the center of the light beam outgoing pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010881501.0A CN112014285A (en) | 2020-08-27 | 2020-08-27 | Light path joint of direct-reading dust concentration measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010881501.0A CN112014285A (en) | 2020-08-27 | 2020-08-27 | Light path joint of direct-reading dust concentration measuring instrument |
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| CN112014285A true CN112014285A (en) | 2020-12-01 |
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| CN202010881501.0A Pending CN112014285A (en) | 2020-08-27 | 2020-08-27 | Light path joint of direct-reading dust concentration measuring instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014283A (en) * | 2020-08-27 | 2020-12-01 | 苏州亿利安机电科技有限公司 | Optical path system of direct-reading dust concentration measuring instrument |
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| EP0590487A1 (en) * | 1992-10-02 | 1994-04-06 | ENDRESS + HAUSER CONDUCTA GESELLSCHAFT FÜR MESS UND REGELTECHNIK mbH & Co. | Device for turbidity measurement in aqueous media |
| CN103822858A (en) * | 2014-02-28 | 2014-05-28 | 苏州亿利安机电科技有限公司 | A dust concentration on-line monitoring device with a dust sensor |
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| CN206573444U (en) * | 2017-03-31 | 2017-10-20 | 中煤科工集团重庆研究院有限公司 | Optics-based unpowered dust detection system and device |
| CN207463707U (en) * | 2017-11-06 | 2018-06-08 | 烟台工程职业技术学院 | A kind of drill bit cleaning machine and control system |
| US20180275048A1 (en) * | 2017-03-23 | 2018-09-27 | Lakehead University | Gas Cell Based on Hollow-Core Photonic Crystal Fiber and its Application for the Detection of Greenhouse Gas: Nitrous Oxide |
-
2020
- 2020-08-27 CN CN202010881501.0A patent/CN112014285A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0590487A1 (en) * | 1992-10-02 | 1994-04-06 | ENDRESS + HAUSER CONDUCTA GESELLSCHAFT FÜR MESS UND REGELTECHNIK mbH & Co. | Device for turbidity measurement in aqueous media |
| CN103822858A (en) * | 2014-02-28 | 2014-05-28 | 苏州亿利安机电科技有限公司 | A dust concentration on-line monitoring device with a dust sensor |
| CN205643752U (en) * | 2016-04-19 | 2016-10-12 | 洛阳阿舒尔光电科技有限公司 | Laser precipitation phenomenon drop -size distribution detector |
| US20180275048A1 (en) * | 2017-03-23 | 2018-09-27 | Lakehead University | Gas Cell Based on Hollow-Core Photonic Crystal Fiber and its Application for the Detection of Greenhouse Gas: Nitrous Oxide |
| CN206573444U (en) * | 2017-03-31 | 2017-10-20 | 中煤科工集团重庆研究院有限公司 | Optics-based unpowered dust detection system and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112014283A (en) * | 2020-08-27 | 2020-12-01 | 苏州亿利安机电科技有限公司 | Optical path system of direct-reading dust concentration measuring instrument |
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