CN211825571U

CN211825571U - Small-flow cutter and light scattering particulate monitor

Info

Publication number: CN211825571U
Application number: CN202020192829.7U
Authority: CN
Inventors: 路浩; 赵斌; 李福民
Original assignee: Qingdao And Cheng Environmental Protection Technology Co ltd
Current assignee: Qingdao And Cheng Environmental Protection Technology Co ltd
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2020-10-30
Anticipated expiration: 2030-02-20

Abstract

The utility model provides a little flow cutter and light scattering particulate matter monitor belongs to particulate matter check out test set field, and this little flow cutter cooperates with the aspiration pump and is used for the particle separation of light scattering particulate matter monitor, including centrifugal chamber, the air inlet that communicates with centrifugal chamber, large granule collection room and gas outlet, and the flow of aspiration pump is 2.83L/min; one end of the centrifugal chamber close to the large particle collecting chamber is of a conical structure; the diameter of the end of the conical structure connected with the large particle collecting chamber is 2.6-3.0mm, the diameter of the end of the conical structure far away from the large particle collecting chamber is 10-12mm, and the length of the conical structure is 11-13 mm. The utility model overcomes current particulate matter cutting separator leads to measurement accuracy and the poor technical problem of the degree of accuracy because of not prescribing a limit to the flow that equipment size and cooperation were used, has separation accuracy, the degree of accuracy, cuts efficient characteristics.

Description

Small-flow cutter and light scattering particulate monitor

Technical Field

The utility model belongs to the particulate matter check out test set field especially relates to a low discharge cutterbar and light scattering particulate matter monitor.

Background

Particulates are one of the important pollutants in air, wherein particulates having a particle size of less than 100 μm are referred to as total suspended particles, TSP; particulate matter having a particle size of less than 10 μm is known as respirable particles, i.e., PM 10. The accurate detection of the concentration of the particulate matter is of great significance to human health. The light scattering particulate matter monitor utilizes the particle size of optical measurement particulate matter, has the characteristics of simple principle, small equipment and relatively low cost, and is widely applied to the field of particulate matter detection. However, most of the light scattering particulate matter monitors on the market today do not have a cutter. However, in practical use, since the cutter is not used to perform relevant separation on the particulate matter, the detection accuracy of the light scattering particulate matter monitor becomes lower and lower, the concentration of the PM10 cannot be accurately detected, and the service life of the light scattering particulate matter monitor is shortened.

Chinese patent CN208254899U discloses a small flow gas particulate matter cutting and separating device, which comprises a centrifugal force chamber and a centrifugal separation collecting chamber communicated with the centrifugal force chamber; the middle part of the centrifugal force chamber is of a conical structure, the centrifugal separation collection chamber is installed at the tail end of the centrifugal force chamber, an air inlet is formed in the side part of the centrifugal force chamber, a sealing seat is arranged at the front end of the centrifugal force chamber, and an air outlet is formed in the sealing seat. And discloses that the small-flow gas particle cutting and separating device is used in air quality detection.

However, since the size of the centrifugal chamber and the flow rate of the suction pump determine the cut particle size, the above patent does not define the size of the device and the flow rate with which it is used, resulting in poor measurement accuracy and precision.

Disclosure of Invention

The utility model provides a main problem be to above-mentioned particulate matter cutting separator lead to measurement accuracy and the poor technical problem of the degree of accuracy because of not injecing the flow that equipment size and cooperation were used, provide a little flow cutterbar that has separation precision, degree of accuracy, cutting efficiency height.

In order to achieve the above object, the utility model discloses a technical scheme be:

the utility model discloses an aspect provides a little flow cutter, is used for the particle separation of light scattering particulate matter monitor with the cooperation of aspiration pump, including centrifugal chamber, the air inlet that communicates with centrifugal chamber, large granule collection room and gas outlet, the flow of aspiration pump is 2.83L/min; one end of the centrifugal chamber close to the large particle collecting chamber is of a conical structure; the diameter of the end of the conical structure connected with the large particle collecting chamber is 2.6-3.0mm, the diameter of the end of the conical structure far away from the large particle collecting chamber is 10-12mm, and the length of the conical structure is 11-13 mm.

Preferably, the flow rate of the air suction pump is 2.83L/min; the toper structure with the diameter of the continuous one end of room is collected to the large granule is 2.8mm, the toper structure is kept away from the diameter of room one end is collected to the large granule is 11mm, the toper structure height is 12 mm.

Preferably, the air inlet is of an inverted cone structure.

Preferably, the diameter of the bottom surface above the air inlet is 7-9mm, the diameter of the bottom surface below the air inlet is 2.6-3.0mm, and the height of the air inlet is 8.5-11 mm; the size of the air outlet along the gas flowing direction is 14-16mm, and the size of the air outlet perpendicular to the gas flowing direction is 13-15 mm.

Preferably, the diameter of the bottom surface above the air inlet is 8mm, the diameter of the bottom surface below the air inlet is 2.8mm, and the height of the air inlet is 10 mm; the size of the gas outlet along the gas flowing direction is 14mm, and the size of the gas outlet perpendicular to the gas flowing direction is 14 mm.

The utility model discloses on the other hand provides one kind and includes above arbitrary the light scattering particulate matter monitor of little flow cutterbar, still include aspiration pump and light scattering sensor, the aspiration pump little flow cutterbar and light scattering sensor links to each other in proper order.

Preferably, the pump flow rate is 2.83L/min.

Compared with the prior art, the utility model discloses an advantage and beneficial effect lie in:

1. the utility model provides a small-flow cutter, which is characterized in that the separation precision and the accuracy are high by limiting the size of a centrifugal chamber and matching with a suction pump with a certain flow;

2. the utility model provides a small flow cutter, which improves the cutting efficiency by limiting the sizes of an air inlet and an air outlet;

3. the utility model discloses still provide a light scattering particulate matter monitor, can accurately measure the concentration of PM2.5, PM10 and TSP.

Drawings

FIG. 1 is a schematic structural view of a small flow cutter of the present invention;

in the above figures: 1. a centrifugal chamber; 11. a tapered structure; 2. an air inlet; 3. a large particle collection chamber; 4. and an air outlet.

Detailed Description

The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in fig. 1, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b): as shown in fig. 1, the utility model provides a small flow cutter, which is used for particle separation of a light scattering particle monitor in cooperation with an air pump, and comprises a centrifugal chamber 1, an air inlet 2 communicated with the centrifugal chamber 1, a large particle collecting chamber 3 and an air outlet 4, wherein the flow of the air pump is 2.83L/min; one end of the centrifugal chamber 1 close to the large particle collecting chamber 3 is a conical structure 11; the diameter of the end of the conical structure 11 connected with the large particle collecting chamber 3 is 2.6-3.0mm, the diameter of the end of the conical structure 11 far away from the large particle collecting chamber 3 is 10-12mm, and the length of the conical structure 11 is 11-13 mm. The light scattering method can directly measure the particle diameter, the size of the centrifugal chamber 1 and the flow of the air suction pump determine the cutting particle size, and the small-flow cutter is beneficial to improving the accuracy and precision of particle separation by limiting the size of the centrifugal chamber 1 and matching with the flow of the air suction pump, so that the concentrations of PM2.5, PM10 and TSP can be accurately measured. Specifically, the detection gas enters the cutter from the gas inlet 2 and rotates in the centrifugal chamber 1, particulate matters with particle sizes larger than PM10 are separated and accumulated in the large particle collection chamber 3, and particulate matters smaller than or equal to PM10 flow out of the gas outlet 4 along with the gas.

In order to further improve the precision and accuracy of separation, the flow rate of the air suction pump is 2.83L/min; the diameter of the end of the conical structure 11 connected with the large particle collecting chamber 3 is 2.8mm, the diameter of the end of the conical structure 11 far away from the large particle collecting chamber 3 is 11mm, and the height of the conical structure 11 is 12 mm.

Further, the air inlet 2 is of an inverted cone structure.

In order to improve the cutting efficiency, the diameter of the bottom surface above the air inlet 2 is 7-9mm, the diameter of the bottom surface below the air inlet 2 is 2.6-3.0mm, and the height of the air inlet 2 is 8.5-11 mm; the size of the air outlet 4 along the air flowing direction is 14-16mm, and the size of the air outlet 4 vertical to the air flowing direction is 13-15 mm.

Further, the diameter of the bottom surface above the air inlet 2 is 8mm, the diameter of the bottom surface below the air inlet 2 is 2.8mm, and the height of the air inlet 2 is 10 mm; the size of the gas outlet 4 in the gas flow direction is 14mm, and the size of the gas outlet 4 perpendicular to the gas flow direction is 14 mm. It should be noted that the size of the centrifugal chamber 1 and the flow of the air pump determine the cutting particle size, the size of the air inlet 2 and the air outlet 4 determine the cutting efficiency, and when the flow of the air pump is 2.83L/min; the diameter of the end of the conical structure 11 connected with the large particle collecting chamber 3 is 2.8mm, the diameter of the end of the conical structure 11 far away from the large particle collecting chamber 3 is 11mm, and the height of the conical structure 11 is 12 mm; the diameter of the bottom surface above the air inlet 2 is 8mm, the diameter of the bottom surface below the air inlet 2 is 2.8mm, and the height of the air inlet 2 is 10 mm; the cutting efficiency of PM10 was 58% when the size of gas outlet 4 in the gas flow direction was 14mm and the size of gas outlet 4 perpendicular to the gas flow direction was 14 mm.

The utility model discloses on the other hand provides a light scattering particulate matter monitor of little flow cutterbar that includes above arbitrary embodiment list, still includes aspiration pump and light scattering sensor, and aspiration pump, little flow cutterbar and light scattering sensor link to each other in proper order. This light scattering particulate matter monitor can accurately measure the concentration of PM2.5, PM10 and TSP, simultaneously, through setting up the low discharge cutterbar, has not only further improved the precision and the degree of accuracy of testing result, has still prolonged light scattering sensor's life simultaneously.

Further, the flow rate of the suction pump was 2.83L/min. Through limiting the flow of the air suction pump, the particulate matter is detected at a fixed flow, and the accuracy and precision of detection are ensured.

The process of cutting and separating the particles by the small-flow cutter comprises the following steps:

the detection gas enters the cutter from the gas inlet 2 and rotates in the centrifugal chamber 1, the particles with the particle size larger than PM10 are separated and accumulated in the large particle collection chamber 3, and the particles with the particle size smaller than or equal to PM10 flow out from the gas outlet 4 along with the gas.

Claims

1. The utility model provides a little flow cutterbar, is used for the particle separation of light scattering particulate matter monitor with the cooperation of aspiration pump, includes centrifugal chamber (1), collects room (3) and gas outlet (4) with air inlet (2), large granule of centrifugal chamber (1) intercommunication, its characterized in that:

the flow rate of the air suction pump is 2.83L/min;

one end of the centrifugal chamber (1) close to the large particle collecting chamber (3) is of a conical structure (11);

the diameter of the end, connected with the large particle collecting chamber (3), of the conical structure (11) is 2.6-3.0mm, the diameter of the end, far away from the large particle collecting chamber (3), of the conical structure (11) is 10-12mm, and the length of the conical structure (11) is 11-13 mm.

2. The small flow cutter of claim 1, wherein:

the flow rate of the air suction pump is 2.83L/min;

conical structure (11) with the diameter of the continuous one end of room (3) is collected to the large granule is 2.8mm, conical structure (11) are kept away from the diameter of room (3) one end is collected to the large granule is 11mm, conical structure (11) height is 12 mm.

3. The small flow cutter of claim 1, wherein: the air inlet (2) is of an inverted cone structure.

4. The small flow cutter of claim 1, wherein: the diameter of the bottom surface above the air inlet (2) is 7-9mm, the diameter of the bottom surface below the air inlet (2) is 2.6-3.0mm, and the height of the air inlet (2) is 8.5-11 mm; the size of the air outlet (4) along the gas flowing direction is 14-16mm, and the size of the air outlet (4) perpendicular to the gas flowing direction is 13-15 mm.

5. The small flow cutter of claim 4, wherein: the diameter of the bottom surface above the air inlet (2) is 8mm, the diameter of the bottom surface below the air inlet (2) is 2.8mm, and the height of the air inlet (2) is 10 mm; the size of the gas outlet (4) along the gas flowing direction is 14mm, and the size of the gas outlet (4) perpendicular to the gas flowing direction is 14 mm.

6. Light scattering particulate monitor comprising a small flow cutter as claimed in any one of claims 1 to 5, wherein: the device also comprises an air suction pump and a light scattering sensor, wherein the air suction pump, the small-flow cutter and the light scattering sensor are sequentially connected.

7. The light scattering particulate matter monitor of claim 6, wherein: the flow rate of the air pump is 2.83L/min.