CN211825569U - Light scattering particulate matter detector - Google Patents

Abstract

The utility model provides a light scattering particulate matter detector, including consecutive sampling head, heating rod and optical sensor, the heating rod from interior to exterior includes in proper order: the breather pipe is used for the circulation of the gas to be measured; the heating pipe is used for heating the gas to be detected; a heat insulation pipe and a protection pipe for protecting an operator from being scalded; the heating pipe is sleeved outside the ventilating pipe, the heat insulation pipe is sleeved outside the heating pipe, and the protection pipe is sleeved outside the heat insulation pipe; the two ends of the heating pipe, the heat insulation pipe and the protection pipe are arranged in a flush manner, and the two ends of the vent pipe extend out of the two ends of the heating pipe; the sampling head, the heating rod and the optical sensor are connected in a straight line. The utility model overcomes current particulate matter detector can only remove the water of mixing between the particulate matter, and it can not get rid of particulate matter surface adsorption's hydrone to influence the technical problem of testing result, have the hydrone that can get rid of particulate matter surface adsorption, the accurate characteristics of testing result.

Description

Light scattering particulate matter detector

Technical Field

The utility model belongs to the particulate matter detecting instrument field especially relates to a light scattering particulate matter detector.

Background

Particulate matter is of great interest as one of the important pollutants in air, and therefore, accurate measurement of particulate matter concentration is of great importance. The method for measuring the concentration of the particulate matters by the light scattering method has the advantages of rapidness, sensitivity, good stability, simple instrument structure, small volume, low cost and the like, and is widely applied in recent years. However, when the particulate matter concentration is measured by the light scattering method, the relative humidity affects the detection result, and the higher the humidity is, the larger the measurement error is.

Chinese patent CN206002417U discloses a particulate matter detector with self-heating dehumidification function, the detector includes sampling head, heating pipe, temperature and humidity sensor, accurate container, dust collector, PID temperature heating controller, detector, dehumidifier, filter, air pump 1 and air pump 2, acquisition controller, first to second solenoid valve. The control method comprises a normal measurement method, an automatic heating dehumidification control method and an automatic zero marking and backwashing control method; during the normal measurement method, the air pump 2 pumps the air of the ambient air into the quasi-container, and the air pump 1 pumps the air from the quasi-container for measurement; and if the humidity monitored by the temperature and humidity sensor exceeds a preset threshold value, the heating pipe starts to heat the gas flowing through the heating sampling head. When the backwashing function is realized, the first electromagnetic valve is closed, the second electromagnetic valve is opened, the air pump 1 is closed, the air pump 2 is opened, and air reaches the detector through the filter, the dehumidifier and the second electromagnetic valve and then enters the air pump 2 from the quasi-container to be discharged.

However, the above patent can only remove water mixed between particles, and it cannot effectively remove water molecules on the surface of particles, thereby affecting the detection result.

Disclosure of Invention

The utility model discloses can only remove the water of mixing between the particulate matter to foretell particulate matter detector, it can not get rid of particulate matter surface adsorption's hydrone to influence the technical problem of testing result, provide one kind and have the hydrone that can get rid of particulate matter surface adsorption, the accurate light scattering particulate matter detector of testing result.

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

the utility model provides a light scattering particle detector, which comprises a sampling head, a heating rod and an optical sensor which are connected in sequence,

the heating rod comprises from inside to outside in sequence:

the breather pipe is used for the circulation of the gas to be measured;

the heating pipe is used for heating the gas to be detected;

a heat insulation pipe and a protection pipe for protecting an operator from being scalded;

the heating pipe is sleeved outside the ventilating pipe, the heat insulation pipe is sleeved outside the heating pipe, and the protection pipe is sleeved outside the heat insulation pipe;

the two ends of the heating pipe, the heat insulation pipe and the protection pipe are arranged in a flush mode, and the two ends of the vent pipe extend out of the two ends of the heating pipe;

the sampling head, the heating rod and the optical sensor are linearly connected.

Preferably, the sampling device further comprises a cutter positioned between the sampling head and the heating rod, and the sampling head, the cutter, the heating rod and the optical sensor are linearly connected.

Preferably, the cutter comprises a connector for connecting the cutter and the heating rod;

the breather pipe cover is located in the connector, just the connector with be equipped with O type circle between the breather pipe.

Preferably, the heating rod is connected to the optical sensor through a flange.

Preferably, the flange shaft is sleeved in the lower end of the vent pipe, and an O-shaped ring is arranged on the inner wall of the vent pipe.

Preferably, the heating pipe heating device further comprises a control component for controlling the heating pipe switch.

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

the utility model provides a light scattering particulate matter detector can effectively get rid of particulate matter surface adsorption's hydrone, has characteristics that the testing result is accurate, the precision is high.

Drawings

Fig. 1 is a schematic structural diagram of the light scattering particle detector of the present invention;

FIG. 2 is a schematic structural view of the heating rod of the present invention;

FIG. 3 is a schematic view of the installation and connection of the present invention;

in the above figures: 1. a sampling head; 2. a heating rod; 21. a breather pipe; 22. heating a tube; 23. a heat insulating pipe; 24. protecting the tube; 3. an optical sensor; 4. a connector; 5. a flange; 51. a flange shaft; 6. And an O-shaped ring.

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 and 2, the present embodiment provides a light scattering particle detector, which includes a sampling head 1, a heating rod 2 and an optical sensor 3 connected in sequence, wherein the heating rod 2 sequentially includes from inside to outside: a vent pipe 21 for circulating the gas to be measured; a heating pipe 22 for heating the gas to be measured; an insulating tube 23 and a protection tube 24 for protecting an operator from being scalded; the heating pipe 22 is sleeved outside the vent pipe 21, the heat insulation pipe 23 is sleeved outside the heating pipe 22, and the protection pipe 24 is sleeved outside the heat insulation pipe 23; the two ends of the heating pipe 22, the heat insulation pipe 23 and the protection pipe 24 are arranged in a flush manner, and the two ends of the vent pipe 21 extend out of the two ends of the heating pipe 22; the sampling head 1, the heating rod 2 and the optical sensor 3 are linearly connected. It should be noted that, particulate matter surface adsorption water molecule can lead to the particulate matter particle diameter grow, can lead to the testing result inaccurate when adopting the method of scattering to measure particulate matter concentration, detects the problem that the precision is low, and this light scattering particulate matter detector carries out dynamic regulation and control to heating pipe 22 internal environment temperature through real-time detection air humidity, can effectively get rid of the hydrone on particulate matter surface, improves and detects precision and accuracy. In addition, this embodiment has still injectd sampling head 1, heating rod 2 and 3 linear connections of optical sensor, and the centre is not bent, can guarantee that the gas circuit is the straight way, and detection efficiency is high, and is little to detecting the influence.

In order to improve the accuracy of the detection result, the device further comprises a cutter positioned between the sampling head 1 and the heating rod 2, and the sampling head 1, the cutter, the heating rod 2 and the optical sensor 3 are connected in a straight line.

As shown in fig. 3, in order to ensure airtightness, the cutter includes a connector 4 for connecting the cutter to the heating rod 2; the vent pipe 21 is sleeved in the connector 4, and an O-shaped ring 6 is arranged between the connector 4 and the vent pipe 21.

For the purpose of easy detachment, the heating rod 2 is connected to the optical sensor 3 via a flange 5.

In order to ensure air tightness, the flange shaft 51 is sleeved in the lower end of the vent pipe 21, and the inner wall of the vent pipe 21 is provided with an O-shaped ring 6.

In order to realize dynamic heating dehumidification, a control component for controlling the heating pipe 22 to be switched is also included. The control component comprises a software control component electrically connected with the heating component of the heating pipe 22, and is used for controlling the heating of the heating pipe 22 and stopping heating according to specific needs. Further, the temperature sensor is arranged below the vent pipe 21 and is electrically connected with the software control component.

The working process of the light scattering particulate matter detector is as follows:

what the sampling head 1 gathered contains the particulate matter gas that awaits measuring gets into optical sensor 3 through breather pipe 21 and detects, at the in-process through breather pipe 21, carry out developments real-time heating through the control assembly control to the gas in the heating pipe 22, heat the gas that awaits measuring containing the particulate matter, with particulate matter surface and hydrone separation, detect under the state of guaranteeing that the particulate matter surface does not adsorb the hydrone to the influence of the hydrone on the particulate matter surface that significantly reduces to the testing result.

Claims (6)

1. The utility model provides a light scattering particulate matter detector, includes consecutive sampling head (1), heating rod (2) and optical sensor (3), its characterized in that:

the heating rod (2) sequentially comprises from inside to outside:

a vent pipe (21) for the circulation of the gas to be measured;

the heating pipe (22) is used for heating the gas to be measured;

a heat insulation pipe (23) and a protection pipe (24) for protecting an operator from being scalded;

the heating pipe (22) is sleeved outside the vent pipe (21), the heat insulation pipe (23) is sleeved outside the heating pipe (22), and the protection pipe (24) is sleeved outside the heat insulation pipe (23);

the two ends of the heating pipe (22), the heat insulation pipe (23) and the protection pipe (24) are arranged in a flush manner, and the two ends of the vent pipe (21) extend out of the two ends of the heating pipe (22);

the sampling head (1), the heating rod (2) and the optical sensor (3) are connected in a straight line.

2. The light scattering particulate matter detector of claim 1, wherein: still including being located sampling head (1) with the cutterbar between heating rod (2), sampling head (1) the cutterbar heating rod (2) and optical sensor (3) straight-line connection.

3. The light scattering particulate matter detector of claim 2, wherein: the cutter comprises a connector (4) for connecting the cutter and the heating rod (2);

breather pipe (21) cover is located in connector (4), just connector (4) with be equipped with O type circle (6) between breather pipe (21).

4. The light scattering particulate matter detector of claim 1, wherein: the heating rod (2) is connected with the optical sensor (3) through a flange (5).

5. The light scattering particulate matter detector of claim 4, wherein: the flange shaft (51) is sleeved in the lower end of the vent pipe (21), and an O-shaped ring (6) is arranged on the inner wall of the vent pipe (21).

6. The light scattering particulate matter detector of claim 1, wherein: the heating device also comprises a control component for controlling the heating pipe (22) to be switched on and off.

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