CN212008230U

CN212008230U - Laser scattering detects particulate matter device

Info

Publication number: CN212008230U
Application number: CN202020566404.8U
Authority: CN
Inventors: 吕磊; 石艳菊; 许海珍; 刘鹏
Original assignee: Qingdao Mingde Environmental Protection Apparatus Co ltd
Current assignee: Qingdao Mingde Environmental Protection Apparatus Co ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-11-24
Anticipated expiration: 2030-04-16

Abstract

The utility model discloses a laser scattering particle detection device which comprises a host computer; the sampling pipe is fixedly connected with the host, and an air inlet pipe is arranged in the sampling pipe; a data processing module disposed within the host; and the optical assembly is arranged in the sampling pipe and is connected in series in the air inlet pipe. The utility model provides a light subassembly directly concatenates in the gas circuit, has saved settings such as heat preservation, has reduced the volume, has reduced the adsorbed probability by the pipe wall of particulate matter in the gas circuit simultaneously, has improved follow-up detection precision.

Description

Laser scattering detects particulate matter device

Technical Field

The utility model relates to an environmental monitoring field, including the oil smoke monitoring, the raise dust monitoring, smoke and dust monitoring etc. especially relate to a laser scattering detects particulate matter device.

Background

At present, in the background of frequent haze weather, people are very concerned about the air quality around the body due to health considerations, and people hope to know the concentration level of air particles in the environment at any time so as to take targeted measures for personal protection. The device for detecting the particles through laser scattering has wide application in the aspects of detecting oil fume particles, environment dust particles, pollution source particles and the like in the catering industry.

In the existing laser scattering particle detection device, an optical component is arranged in a host, and a heat preservation layer or a heating layer is arranged outside the optical component, so that the module has a large structural size and is not beneficial to gas circuit connection in an instrument; on the other hand, the particulate matter in the inlet duct need can get into optical assembly through longer gas line, causes the particulate matter to be absorbed by the gas circuit inner wall, reduces concentration.

To sum up, in order to practice thrift module cost, improve and detect the precision, a laser scattering detects particulate matter device is required now to the too big defect of module in the improvement prior art.

SUMMERY OF THE UTILITY MODEL

For solving above-mentioned prior art problem, the utility model provides a with low costs, detect the high laser scattering detection particulate matter device of precision, specifically adopt following technical scheme:

a laser scattering particle detection device comprises

A host;

the sampling pipe is fixedly connected with the host, and an air inlet pipe is arranged in the sampling pipe;

a data processing module disposed within the host;

and the optical assembly is arranged in the sampling pipe and is connected in series in the air inlet pipe.

In some embodiments of the present invention, the optical assembly includes a gas circuit connector, a laser, and a receiver connected to the gas inlet pipe.

In some embodiments of the present invention, the laser is disposed in a direction perpendicular to the direction of the receiver.

In some embodiments of the present invention, the inner side of the gas path nozzle is a spherical surface, and the spherical surface is a polished surface.

In some embodiments of the present invention, the optical assembly further comprises a protective glass, the protective glass is disposed at the front end of the laser and the front end of the receiver for preventing the contamination of the laser and the receiver by particles.

In some embodiments of the present invention, a joint between the laser and the receiver and the optical assembly is provided with a sealing ring.

In some embodiments of the present invention, one end of the air inlet pipe is connected to the host; the other end of the sampling tube extends out of the sampling tube to collect the particles to be measured.

In some embodiments of the present invention, the apparatus further comprises a pump disposed in the host machine.

The utility model discloses a theory of operation does:

the optical component is connected in series in an air path, specifically, an air path connecting nozzle axially arranged in the optical component is connected in series on an air inlet pipe, particulate matters to be detected enter the air inlet pipe under the action of a pump and then enter the optical component through the air path connecting nozzle, a laser transmits measuring laser through a protective lens, a receiver receives optical signals scattered by the particulate matters, then the laser and the receiver transmit respective optical signals to a data processing module through wires, and the data processing module receives and processes the optical signals to obtain information of the particulate matters in the air path.

The technical scheme of the utility model prior art relatively has following technological effect:

the optical assembly is directly connected in series with the gas circuit, so that the arrangement of a heat insulation layer and the like is omitted, the size is reduced, meanwhile, the probability of adsorption of particles by the pipe wall in the gas circuit is reduced, and the follow-up detection precision is improved.

The laser and the receiver are integrated on the optical component, the laser and the receiver are arranged at vertical positions, the optical path is short, collimation adjustment is not needed, and the accuracy of particle detection is ensured and the measurement steps are simplified; the light assembly with small volume can be integrated at any position of the front end or the rear end of the gas circuit, so that the application is more flexible.

Three, the utility model discloses in set up the protective glass at laser instrument and receiver front end to utilize the sealing washer sealed with laser instrument and receiver, prevent it by particulate matter pollution, reduce the interference of impurity etc. improves detection device's measurement accuracy, increases detection device's life.

Fourthly, the utility model discloses in make into the sphere in the gas circuit nipple inboard, the sphere polishing is handled, increases the scattering rate of laser, makes receiver received signal more sensitive, and data response is fast.

Drawings

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

Fig. 1 is a schematic structural diagram of a device for detecting particulate matter by laser scattering in embodiment 1.

Fig. 2 is a schematic structural diagram of a device for detecting particulate matter by laser scattering in embodiment 2.

Fig. 3 is a schematic structural view of the optical module in embodiment 1.

Fig. 4 is a schematic sectional view taken along line a-a in fig. 2.

Fig. 5 is a schematic cross-sectional view of B-B in fig. 3.

Reference numerals: 1-a host; 2-a sampling tube; 3-a data processing module; 4-a pump; 5, an air inlet pipe; 6-an optical component; 61-a first gas path nozzle; 62-a second gas path nozzle; 63-a laser; 64-a receiver; 65-protective glasses; 66-sealing ring; 7-hat type structure.

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 work belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Example 1

As shown in fig. 1, a laser scattering particle detection device includes a host 1, a sampling tube 2, a data processing module 3, a pump 4, an air inlet tube 5 and an optical assembly 6.

Regarding the sampling pipe 2, which is welded with the shell of the host machine 1, an air inlet pipe 5 is arranged in the sampling pipe 2; one end of an air inlet pipe 5 is arranged in the main machine 1; the other end extends out of the sampling pipe 2 to collect the particles to be measured. The pump 4 is built in the main machine 1, and is usually connected with the air inlet pipe 5 to provide power for collecting the particles to be measured.

With regard to the light assembly 6, it is arranged within the sampling tube 2. As shown in fig. 2-4, the optical assembly 6 includes axially disposed first and second

air access nozzles

61 and 62, a laser 63, and a receiver 64. The inner sides of the first air path nozzle 61 and the second air path nozzle 62 are made into spherical surfaces, and the spherical surfaces are polished to increase the scattering rate of laser, so that a receiver can receive signals more sensitively and the data response is fast; this light subassembly 6 concatenates in intake pipe 5 through first gas circuit connector 61 and second gas circuit connector 62, integrates promptly to the gas circuit in, under the effect of pump 4, the particulate matter that awaits measuring in the gas gets into the light subassembly through first gas circuit connector 61 in intake pipe 5, discharges by second gas circuit connector 62 and gets into in intake pipe 5 once more. FIG. 3 is a cross-sectional view taken from A-A in FIG. 2, in which it can be seen that the laser 63 is disposed in a direction perpendicular to the direction of the receiver 64, i.e., the laser 63 is disposed below the optical module gas path and the receiver 64 is disposed to the side of the gas path, both perpendicular to the direction of the gas path; laser emitted by the laser 63 irradiates the gas path, and the receiver 64 receives laser signals reflected by particles in the gas path; because the laser energy is larger, if the receiver 64 is disposed opposite to the laser 63, more of the laser light received by the receiver 64 is not scattered, and the scattered laser signal is weaker.

Wherein the data processing module 3 is arranged in the host 1; the optical assembly 6 is electrically connected with the data processing module 3, and the data processing module 3 is used for receiving and processing data information sent by the laser 63 and the receiver 64, and then outputting the processed data to complete the detection function of the laser scattering particle detection device. The optical assembly 6 is further provided with a protective lens 65, and the protective lens 65 is arranged at the front end of the laser 63 and the front end of the receiver 64 and used for preventing particles from polluting the laser 63 and the receiver 64. The laser 63 and the receiver 64 are sealed by the sealing ring 66 at the connection with the optical assembly 6, so as to further prevent particles from entering the laser 63 or the receiver 64, thereby affecting the measurement accuracy and the service life of the optical assembly 6.

The utility model discloses a theory of operation does:

the first air path connector 61 and the second air path connector 62 in the optical component 6 are connected in series in the front end or the rear end of the air path, specifically, the first air path connector 61 and the second air path connector 62 symmetrically arranged in the optical component 6 are connected in series on the air inlet pipe 5, the particulate matter to be measured enters the air inlet pipe 5 under the action of the pump 4 and then enters the optical component 6 through the first air path connector 61, the laser 63 emits measuring laser through the protective lens 65, the particulate matter in the optical component 6 scatters the measuring laser, meanwhile, the receiver 64 receives an optical signal scattered by the particulate matter through the protective lens 65, in some preferred schemes, an optical trap can be arranged at a position right opposite to the laser 63, and the optical trap can absorb the laser directly emitted by the laser 63 and not scattered by the particulate matter. Then, the laser 63 and the receiver 64 transmit respective optical signals to the data processing module 3 through wires, and the data processing module 3 receives and processes the optical signals to obtain information of the particles in the gas path.

Example 2

Compared with the embodiment 1, the difference of the embodiment is that one end of the sampling tube 2 is welded with the shell of the host 1, and the other end of the sampling tube is fixedly connected with the cap-shaped structure 7 so as to collect the particles to be detected and prevent the pollution particles from blocking the sampling tube 2 and the air inlet tube 5; an air inlet pipe 5 is arranged in the sampling pipe 2; one end of an air inlet pipe 5 is arranged in the main machine 1; the other end does not extend out of the sampling tube 2.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A laser scattering particle detection device is characterized by comprising

A host;

a data processing module disposed within the host;

2. The laser scattering particle detection device as claimed in claim 1, wherein said optical assembly comprises an air channel nozzle connected to said air inlet tube, a laser and a receiver.

3. The laser scattering particle detection device as claimed in claim 2, wherein the laser is disposed in a direction perpendicular to the direction in which the receiver is disposed.

4. The apparatus for detecting particles by laser scattering of claim 2, wherein the inner side of the gas nozzle is a spherical surface, and the spherical surface is a polished surface.

5. The laser scattering particle detection device as claimed in claim 2, wherein the optical assembly further comprises a protective lens disposed at the front end of the laser and the front end of the receiver for preventing particles from contaminating the laser and the receiver.

6. The laser scattering particle detection device as claimed in claim 2, wherein the connection between the laser and the receiver and the optical assembly is provided with a sealing ring.

7. The laser scattering particulate matter detection device of claim 1, wherein one end of the air inlet pipe is connected with the host; the other end of the sampling tube extends out of the sampling tube to collect the particles to be measured.

8. The laser scattering particle detection device of claim 1, further comprising a pump disposed in the host machine.