CN211856262U

CN211856262U - Particulate matter detection device and detection system with same

Info

Publication number: CN211856262U
Application number: CN201921292401.3U
Authority: CN
Inventors: 于志伟; 廖义雷; 王大伟; 高鹏飞; 盛润坤
Original assignee: Hangzhou Chunlai Technology Co Ltd
Current assignee: Hangzhou Chunlai Technology Co Ltd
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2020-11-03
Anticipated expiration: 2029-08-09

Abstract

The utility model provides a particulate matter detection device and a detection system with the same, wherein the particulate matter detection device comprises a dust cavity, a light emitting assembly, a light receiving assembly, a calibration assembly, a sample gas inlet and a sample gas outlet; a first protruding wall cavity is arranged at the position, corresponding to the emergent end of the light emitting component, of the dust cavity, and is provided with an emitting port; a second protruding wall cavity is arranged at the position of the dust cavity corresponding to the incident end of the light receiving component; the second protruding wall cavity is provided with a receiving port; the dust cavity is communicated with the outside through the sample gas inlet and the sample gas outlet. By adopting the technical scheme, the arrangement of the first protruding wall cavity and the second protruding wall cavity can protect the lens of the light emission component and the lens of the light receiving end, so that the sample gas is not easy to pollute the lens of the light emission component and the lens of the light receiving end when passing through the dust cavity, the frequency of maintenance of the detection device is reduced, and the stability of the effective service cycle and the detection performance is improved.

Description

Particulate matter detection device and detection system with same

Technical Field

The utility model belongs to the technical field of the particulate matter detects and specifically relates to a particulate matter detection device and have its detecting system is related to.

Background

At present, the main source of air pollution in China is smoke generated by combustion of an industrial boiler. The smoke concentration emission monitoring has great significance for environmental protection. Air, flue gas particulate matter detection device, most are based on optical scattering or reflection detection principle, for example infrared light reflection, laser scattering etc. extensively are applied to fields such as dust detection, air quality monitoring, send into the light room with gas usually, through light source irradiation, optical sensor passes through optical lens and detects the volume of particulate matter. The detection device is small in size, high in detection speed and capable of automatically running, however, the optical lens of the detection device is easy to be polluted by dust, so that the detection performance is reduced, the detection result is deviated, errors occur, and the detection device needs to be cleaned and maintained regularly. For the particle detection device, the effective service period and the maintenance time are important indexes for evaluating the performance of the particle detection device.

Although the chinese patent application CN 106644845 a discloses an optical chamber for optical detection of air particles, which can use a cleaning device in a maintenance bin to clean an optical lens, the optical chamber has the advantages of complex structure, high manufacturing cost, and small volume of the optical particle detection device.

How to prolong the effective life cycle of optical particulate matter detection device, reduce the maintenance frequency to keep its simple structure characteristics small, the problem that the field needs urgent solution.

SUMMERY OF THE UTILITY MODEL

The utility model provides a particulate matter detection device, which comprises a dust cavity, a light emitting component, a light receiving component, a calibration component, a sample gas inlet and a sample gas outlet;

a first protruding wall cavity is arranged at a position of the dust cavity corresponding to the emitting end of the light emitting assembly, and an emitting port is arranged in the first protruding wall cavity;

a second protruding wall cavity is arranged at the position of the dust cavity corresponding to the receiving end of the light receiving assembly; the second protruding wall cavity is provided with a receiving port;

the sample gas inlet and the sample gas outlet are communicated with the dust cavity and the outside.

In one embodiment, the emission port has a height above the bottom of the dust cavity; the receiving port is higher than the bottom of the dust cavity.

In one embodiment, the emission port is arranged on the wall of the dust cavity and is perpendicular to the horizontal plane.

In one embodiment, the receiving port is arranged on the wall of the dust cavity at an included angle of 20-30 degrees with the horizontal plane;

the height of the receiving port is higher than the height of the transmitting port.

In one embodiment, the dust chamber is the same as any cross section perpendicular to the path of sample gas.

In one embodiment, the wall of the dust chamber where the sample gas outlet is located is a funnel-shaped wall.

In one embodiment, the level of the top of the dust cavity adjacent to the emission port is adapted to the level of the emission port;

the level of the top of the dust cavity adjacent to the receiving port is adapted to the level of the receiving port.

In one embodiment, the light source of the light emitting assembly is modulated light.

The utility model also provides a detecting system, detecting system includes as above particulate matter detection device.

By adopting the technical scheme, the beneficial effects of the utility model are that: the dust cavity is equipped with first protrusion wall chamber with the transmission terminal corresponding position of emission subassembly, the receiving terminal corresponding position with light receiving component is equipped with second protrusion wall chamber, the lens that emission subassembly and light receiving terminal can be protected in the setting in first protrusion wall chamber and second protrusion wall chamber, make the difficult lens that pollutes emission subassembly and light receiving terminal's lens when the sample gas passes through the dust cavity, the frequency that detection device need maintain has been reduced, effective life cycle and the stability of detection performance have been improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic perspective view of an embodiment of the particulate matter detecting device of the present invention.

FIG. 2 is a front view of an embodiment of the particulate matter detecting device of the present invention;

FIG. 3 is a cross-sectional view A-A of the particulate matter detection device of FIG. 2;

FIG. 4 is a cross-sectional view B-B of the particulate matter detection device of FIG. 3;

wherein, 100-dust cavity; 110-bottom of the dust chamber; 120-a first protruding wall cavity; 130-a second raised wall cavity; 140-the top of the dust chamber; 200-a light emitting assembly; 210-optical fiber interface of optical transmission assembly; 220-a light emitting lens; 230-a light emitting assembly aperture; 300-a light receiving component; 310-a light receiving lens; 320-a light receiving component optical fiber; 400-calibrating the assembly; 500-sample gas inlet; 600-sample gas outlet; 700-light trap.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 4, a particle detector according to an embodiment of the present invention includes a dust chamber 100, a light emitting module 200, a light receiving module 300, a calibration module, a sample gas inlet 500, and a sample gas outlet 600. As shown in fig. 3, a first protruding wall cavity 120 is disposed at a position of the dust cavity 100 corresponding to the emission end of the light emitting module 200, and the first protruding wall cavity 120 is disposed with an emission port. A second protruding wall cavity 130 is arranged at a position of the dust cavity 100 corresponding to the receiving end of the light receiving assembly 300; the second projecting wall cavity 130 is provided with a receiving port. The sample gas inlet 500 and the sample gas outlet 600 communicate the dust chamber 100 with the outside.

Dust cavity 100 is equipped with first protruding wall chamber 120 with the transmission end corresponding position of light emission subassembly 200, the receiving end corresponding position with light receiving subassembly 300 is equipped with second protruding wall chamber 130, the lens that can protect light emission subassembly 200 and the lens of light receiving end are set up to first protruding wall chamber 120 and second protruding wall chamber 130, make the difficult lens that pollutes light emission subassembly 200 and light receiving subassembly 300's lens when dust cavity 100 of appearance gas process, the frequency that detection device need maintain has been reduced, effective life cycle and performance detecting's stability has been improved.

The utility model discloses an invention thinking reduces the pollution of dust to emission subassembly and light receiving component 300 through the inside shape of dust cavity 100, need not other clear away the subassembly and can realize its self pollution-free purpose, can enough reduce pollution and maintenance frequency, increase effective life cycle, can avoid the structure too complicated again, make its convenience characteristics that keep the volume.

Optionally, the light emitting assembly 200 includes a light emitting assembly optical fiber interface 210, a light emitting lens 220 and a light emitting assembly aperture 230, the light emitting assembly optical fiber interface 210 is used for connecting light for use; the light emitting lens 220 functions to condense light beams; the light emitting assembly aperture 230 can eliminate astigmatism.

Optionally, the light receiving module 300 includes a light receiving lens 310 and a light receiving module optical fiber 320, the light receiving lens 310 is used for collecting astigmatism generated by particles in the sample gas; the optical receiving component fiber 320 is used for transmitting the signal to a processing device such as an analysis motherboard for signal processing.

Optionally, the calibration assembly 400 is used for particle calibration, and is used for calibrating the angle of the light emitted by the light emitting assembly, so as to prevent the light from shifting and affecting the detection accuracy.

Specifically, the emission port provided in the first protruding wall cavity 120 may be a transparent device or the like for protecting the light emitting assembly 200, and of course, the lens of the light emitting assembly 200 may be directly provided at the emission port. The incident receiving port of the second protruding wall cavity 130 may be a transparent device for protecting the light receiving module 300, or the lens of the light receiving module 300 may be directly disposed at the receiving port. It should be noted that the transparent means does not adversely affect the transmission and reception of light. Further, when the lens with the light emitting module 200 is directly set up at the emission port and the lens with the light receiving module 300 is directly set up at the light receiving port, because the utility model discloses unique dust cavity 100 structure also can effectively avoid the pollutant to adhere to on the lens. As an alternative embodiment, referring to fig. 3, the particle detecting device further includes a light trap disposed on the wall of the dust chamber 100 opposite to the emission port, the light trap being used to eliminate the light scattering generated by the light source.

As an alternative embodiment, the light source of the light emitting assembly 200 is a laser.

As an alternative embodiment, please refer to FIG. 3, the height of the receiving port is higher than the bottom of the dust chamber 100; the height of the emission port is higher than the bottom 110 of the dust chamber. In the long-term use process, even if the dust cavity 100 has residual particles which can fall to the bottom 100 of the dust cavity, the lenses of the light emitting assembly 200 and the lenses of the light receiving end can not be polluted.

Alternatively, referring to fig. 2 and 4, the sample gas inlet 500 and the sample gas outlet 600 are disposed opposite to each other on the wall of the dust chamber 100, so that the sample gas can pass through the dust chamber 100 in a straight line in the horizontal direction. The sample gas passes through dust cavity 100 in the horizontal direction in a straight line, and the sample gas gets in and out the angle of dust cavity 100, combines the inner structure of dust cavity 100, makes the interior residual flue gas particulate matter that is difficult for accumulational of dust cavity 100 for dust cavity 100 is difficult for receiving the pollution when the continuous operation, can further reduce the probability that the sample gas through dust cavity 100 pollutes the lens of optical emission subassembly 200 and the lens of light receiving subassembly 300.

As an alternative embodiment, please refer to fig. 1 and fig. 3, the emission port is disposed on the wall of the dust chamber 100 perpendicular to the horizontal plane; the receiving port and the horizontal plane form an included angle of 20-30 degrees and are arranged on the wall of the dust cavity 100; the height of the receiving port is higher than the height of the transmitting port. The included angle between the receiving port and the horizontal plane is 20-30 degrees, so that the included angle between the light receiving lens and the horizontal plane is 20-30 degrees, and the sensitivity of the light receiving assembly 300 can be ensured by the specific inclination angle. Preferably, the receiving port is angled at 25 ° to the horizontal.

As an alternative embodiment, the dust cavity 100 has the same cross section perpendicular to the path through which the sample gas passes, that is, when the sample gas passes through the dust cavity 100, the cross section of the path has the same size and shape, which does not cause turbulence of the gas flow, on one hand, the accuracy of detection can be ensured, and on the other hand, the lens of the light emitting module 200 and the lens of the light receiving module 300 can be effectively prevented from being polluted.

As an alternative embodiment, the wall of the dust chamber 100 where the sample gas outlet 600 is located is a funnel-shaped wall. The wall of the dust chamber 100 where the sample gas outlet 600 is located is a funnel-shaped wall. The funnel-shaped cavity wall can reduce the residue of the sample gas in the dust cavity 100 when the sample gas passes through the dust cavity 100, and particulate matters such as dust in the sample gas reach the funnel-shaped cavity wall under the action of the airflow and can be gathered as much as possible to be discharged out of the dust cavity 100 from the sample gas outlet under the action of the funnel-shaped structure. Optionally, the funnel cone angle of the funnel cavity wall is 60 ° to 170 °, which may be, for example, 60 °, 70 °, 80 °, 90 °, 100 °, 110 °, 120 °, 130 °, 140 °, 150 °, 160 °, or 170 °; further preferably, the funnel-shaped cone angle of the funnel-shaped cavity wall is 90-140 degrees; more preferably, the funnel cone angle of the funnel-shaped chamber wall is 110 ° to 120 °.

As an alternative embodiment, the level of the top 140 of the dust chamber adjacent to the emission port is adapted to the level of the emission port; the horizontal height of the top 140 of the dust cavity adjacent to the receiving port is adapted to the horizontal height of the receiving port, so that the top of the dust cavity 100 is shaped like ^ A', the structure of the dust cavity 100 enables the sample gas to diffuse towards the receiving port in the dust cavity 100, and the receiving port is inclined downwards at an included angle of 20-30 degrees with the horizontal plane, so that pollutants are not easy to attach, and therefore the distribution of particles in the sample gas in the dust cavity 100 can be effectively balanced, and the pollution to the lens of the light emitting component 200 and the lens of the light receiving component 300 can be further avoided.

The utility model discloses a particulate matter detection device not only can use atmospheric particulates to measure, can be used for the particulate matter detection under the high temperature and high humidity smoke and dust environment moreover.

The utility model discloses the second aspect still provides a detecting system, and detecting system includes foretell particulate matter detection device. The particulate matter detection device in the detection system may be arranged in a conventional arrangement manner, and the structural features and corresponding effects of the particulate matter detection device have been described in detail above, and are not described herein again.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A particulate matter detection device is characterized by comprising a dust cavity (100), a light emitting component (200), a light receiving component (300), a calibration component (400), a sample gas inlet (500) and a sample gas outlet (600);

a first protruding wall cavity (120) is arranged at a position of the dust cavity (100) corresponding to the emitting end of the light emitting component (200), and the first protruding wall cavity (120) is provided with an emitting port;

a second protruding wall cavity (130) is arranged at a position of the dust cavity (100) corresponding to the receiving end of the light receiving assembly (300); the second protruding wall cavity (130) is provided with a receiving port;

the sample gas inlet (500) and the sample gas outlet (600) are used for communicating the dust cavity (100) with the outside.

2. The particulate detection device of claim 1, wherein the emission port is taller than a bottom (110) of the dust cavity; the receiving port has a height above a bottom (110) of the dust cavity.

3. The particulate detection device of claim 2, wherein the emission port is disposed on a wall of the dust chamber (100) perpendicular to a horizontal plane.

4. The particulate matter detection device according to claim 3, wherein the receiving port is arranged on the wall of the dust chamber (100) at an angle of 20 ° to 30 ° with respect to the horizontal plane;

5. The particle detecting device according to claim 4, wherein the dust chamber (100) is the same as an arbitrary cross section perpendicular to a path through which the sample gas passes.

6. The particle detection device according to claim 5, wherein the wall of the dust chamber (100) where the sample gas outlet (600) is located is a funnel-shaped wall.

7. The particulate detection device of claim 5, wherein a level of a top of the dust cavity (100) adjacent to the emission port is adapted to a level of the emission port;

the level of the top of the dust cavity (100) adjacent to the receiving port is adapted to the level of the receiving port.

8. The particle detection device according to any one of claims 1 to 7, wherein the light source of the light emitting assembly (200) is modulated light.

9. A detection system, characterized in that it comprises a particulate matter detection device according to any one of claims 1 to 8.