Inlet gas sampling head of particle size spectrometer

Abstract

The utility model discloses an air inlet sampling head of a particle size spectrometer, and belongs to the technical field of air quality detection. The air inlet sampling head of the particle size spectrometer comprises a rainproof cap; the air inlet valve assembly comprises a main body and a filtering part, one end of the main body is detachably connected with the rainproof cap, an air outlet is formed in the other end of the main body, an air inlet is formed in the outer wall, close to one end of the rainproof cap, of the main body, and an airflow channel is formed in the main body and is configured to allow air to flow in from the air inlet and flow out from the air outlet; the filtering part is tightly attached to the air flow channel and is configured to filter impurities in air flowing into the main body through the air inlet hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of air quality detection, and in particular relates to an air intake sampling head of a particle size spectrometer. Background Art

[0002] With the development of society, environmental problems are becoming increasingly prominent, and air pollution is one of them. Suspended particulate matter refers to the general term for solid and liquid granular substances suspended in the atmosphere. Solid impurities mainly include combustion smoke, salt particles that evaporate after seawater splashes into the atmosphere, dust blown by the wind, as well as bacteria, microorganisms, plant seeds, pollen, etc., which are mostly concentrated in the lower layers of the atmosphere.

[0003] In the existing technology, particulate matter detection is mostly done by directly sampling the air and then testing. However, when there is a lot of suspended matter in the air, it is sucked into the air path of the equipment, which affects the detection results of the particulate matter and the detection accuracy of the equipment. There is a technical problem that the air is not effectively pre-treated. Utility Model Content

[0004] In view of the above analysis, the embodiments of the present invention aim to provide an air intake sampling head for a particle size spectrometer, so as to solve one or more of the above problems existing in the prior art.

[0005] The purpose of this utility model is achieved in this way:

[0006] An air intake sampling head for a particle size spectrometer, comprising:

[0007] Rain hat;

[0008] The air intake valve assembly includes a main body and a filter component. One end of the main body is detachably connected to the rain cap, and the other end is provided with an air outlet. An air intake hole is provided on the outer wall near one end of the rain cap. The main body has an air flow channel inside, and the air flow channel is configured to allow gas to flow in from the air intake hole and flow out from the air outlet. The filter component is arranged close to the air flow channel and is configured to filter impurities in the gas flowing into the main body through the air intake hole.

[0009] Furthermore, a connecting portion is provided at one end of the main body connected to the rainproof cap.

[0010] Furthermore, the rainproof hat includes a first rainproof component, which is in the shape of a cone and has a connecting and fitting portion on the plane of the cone, which is used to fit the connecting portion to connect the main body and the rainproof hat.

[0011] Furthermore, the rainproof hat also includes a second rainproof component, which is cylindrical and has one end connected to the plane edge of the first rainproof component.

[0012] Furthermore, the distance between the air inlet and the tip of the first rainproof component is smaller than the distance between the other end of the second rainproof component and the tip of the first rainproof component.

[0013] Furthermore, the main body is cylindrical, and its diameter is smaller than that of the second rainproof component.

[0014] Furthermore, one end of the main body away from the rain cap is detachably connected to a mounting cover, and the air outlet is provided on the mounting cover.

[0015] Furthermore, a circular sealing ring is provided between the mounting cover and the main body.

[0016] Furthermore, the main body has at least two air flow channels inside, and the number of the air outlet holes is equal to the number of the air flow channels.

[0017] Furthermore, the diameter of the air inlet hole is 0.2-0.3 times the diameter of the main body.

[0018] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0019] The air intake sampling head of the particle size spectrometer provided by the utility model is provided with a rainproof cap to divert rainwater, thereby preventing rainwater from entering the interior of the main body and then entering the detection equipment. The air that will enter the detection equipment is then pre-processed by filtering through the air intake valve assembly, thereby effectively protecting the detection equipment and ensuring the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 A cross-sectional view of the air intake sampling head of the particle size spectrometer provided by the present invention;

[0022] Figure 2 This is a schematic structural diagram of the air intake sampling head of the particle size spectrometer provided by the present invention;

[0023] Figure 3 A front view of the air intake sampling head of the particle size spectrometer provided by the present invention;

[0024] Figure 4 A top view of the air inlet sampling head of the particle size spectrometer provided by the present invention;

[0025] Figure 5A bottom view of the air inlet sampling head of the particle size spectrometer provided by the present invention;

[0026] Figure 6 This is a side view of the air intake sampling head of the particle size spectrometer provided by the present invention.

[0027] Reference numerals:

[0028] 1-rainproof cap; 11-first rainproof component; 12-second rainproof component; 2-inlet valve assembly; 21-main body; 211-air outlet; 212-air inlet; 213-air flow channel; 214-installation cover; 22-filter component. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments disclosed in this disclosure can be combined, separated, interchanged and / or rearranged with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] In the accompanying drawings, the sizes and relative sizes of components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process sequence may be performed in a different order than described. For example, two processes described in succession may be performed substantially simultaneously or in a reverse order from the described order. In addition, the same reference numerals represent the same components.

[0031] Example 1

[0032] A specific embodiment of the present invention is as follows Figure 1-6 As shown, an air intake sampling head of a particle size spectrometer is disclosed, comprising:

[0033] Rain hat 1;

[0034] The air intake valve assembly 2 includes a main body 21 and a filter component 22. One end of the main body 21 is detachably connected to the rain cap 1, and the other end is provided with an air outlet 211. An air intake 212 is provided on the outer wall near one end of the rain cap 1. The main body 21 has an air flow channel 213 inside, and the air flow channel 213 is configured to allow gas to flow in from the air intake 212 and flow out from the air outlet 211; the filter component 22 is arranged close to the air flow channel 213, and is configured to filter impurities in the gas flowing into the main body 21 through the air intake 212.

[0035] During implementation, the rain cap 1 is connected to the air inlet valve assembly 2, and then the air outlet 211 is connected to the detection equipment. The external air flows through the air inlet 212, passes through the filter component 22, and is filtered into the air flow channel 213 inside the subject 21, and then flows into the detection equipment through the air outlet 211 for detection.

[0036] For example, the filter component 22 is made of stainless steel, which is corrosion-resistant and rust-proof for a long time, easy to install and maintain, and can effectively and preliminarily filter out large particles such as flocs floating in the air.

[0037] Compared with the existing technology, the air intake sampling head of the particle size spectrometer provided in this embodiment is equipped with a rainproof cap to divert rainwater, preventing rainwater from entering the main body and then entering the detection equipment. The air about to enter the detection equipment is then filtered and pre-processed through the air intake valve assembly, effectively protecting the detection equipment and ensuring the accuracy of the detection results.

[0038] In this embodiment, a connecting portion is provided at one end of the main body 21 connected to the rain cap 1 .

[0039] Exemplarily, the connection portion may be a threaded or snap-fit ​​structure, which facilitates connection or disassembly of the main body 21 and the inner side of the rain cap 1 to facilitate cleaning or maintenance.

[0040] In this embodiment, the rainproof hat 1 includes a first rainproof component 11, which is in the shape of a cone and has a connecting and fitting portion on the plane of the cone, which is used to fit the connecting portion to connect the main body 21 and the rainproof hat 1.

[0041] Specifically, the material of the rain cap 1 includes corrosion-resistant materials such as aluminum alloy, and the curved surface of the cone is treated with anti-corrosion. The plane of the cone is provided with a connecting fitting portion adapted to the connecting portion to connect the main body 21 with the rain cap 1, such as an internal thread or a groove.

[0042] In this embodiment, the rainproof hat 1 further includes a second rainproof component 12 . The second rainproof component 12 is cylindrical, and one end of the second rainproof component 12 is connected to the plane edge of the first rainproof component 11 .

[0043] Specifically, the first rainproof component 11 and the second rainproof component 12 are integrally formed to protect the intake valve assembly 2 .

[0044] In this embodiment, the distance between the air inlet 212 and the tip of the first rainproof component 11 is smaller than the distance between the other end of the second rainproof component 12 and the tip of the first rainproof component 11 .

[0045] Specifically, if Figure 1As shown in the cross-sectional view, the height of the second rainproof component 12 is set to be greater than the diameter of the air inlet 212, so that the rainproof cap 1 can completely cover the air inlet 212 to prevent rainwater from flowing into the main body 21 through the air inlet 212.

[0046] In this embodiment, the main body 21 is cylindrical, and its diameter is smaller than that of the second rainproof component 12 .

[0047] Specifically, the main body 21 is configured to be cylindrical and is surrounded by the second rainproof component 12. The ratio between the diameter of the main body 21 and the diameter of the second rainproof component 12 can be flexibly set according to actual conditions and is not limited in this embodiment.

[0048] In this embodiment, one end of the main body 21 away from the rain cap 1 is detachably connected to a mounting cover 214 , and the air outlet 211 is provided on the mounting cover 214 .

[0049] Specifically, the mounting cover 214 is used to further fix the connection between the main body 21 and the rain cap 1, and at the same time prevent impurities from entering the air flow channel 213 from the bottom of the main body 21 to cause pollution. The air outlet 211 is provided on the mounting cover 214 for easy cleaning or maintenance.

[0050] In this embodiment, a circular sealing ring is provided between the mounting cover 214 and the main body 21 .

[0051] Specifically, the sealing ring is made of high-temperature resistant and corrosion-resistant materials to ensure that no leakage occurs at the connection between the mounting cover 214 and the main body 21, thereby ensuring the sealing of the airflow channel.

[0052] In this embodiment, the main body 21 has at least two air flow channels 213 inside, and the number of the air outlet holes 211 is equal to the number of the air flow channels 213 .

[0053] Specifically, the multiple air flow channels 213 ensure that no excessive air flow resistance is generated when high-flow air flows in, thereby improving sampling efficiency, and the air flow is diverted through the multiple air outlets 211 to prevent the detection equipment from being impacted by excessive air flow.

[0054] In this embodiment, the diameter of the air inlet 212 is 0.2-0.3 times the diameter of the main body 21 .

[0055] Specifically, the diameter of the air inlet 212 is precisely calculated to ensure a balance between the gas flow rate and the flow velocity, thereby ensuring effective filtration without affecting the stability of the intake air flow rate.

[0056] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. An air intake sampling head for a particle size spectrometer, characterized in that: include: Rain hat (1); An air inlet valve assembly (2) comprises a main body (21) and a filter component (22), wherein one end of the main body (21) is detachably connected to the rainproof cap (1), and the other end is provided with an air outlet (211), and an air inlet (212) is provided on the outer wall near one end of the rainproof cap (1); an air flow channel (213) is provided inside the main body (21), and the air flow channel (213) is configured to allow gas to flow in from the air inlet (212) and flow out from the air outlet (211); the filter component (22) is arranged closely to the air flow channel (213) and is configured to filter impurities in the gas flowing into the main body (21) through the air inlet (212).

2. The air inlet sampling head of the particle size spectrometer according to claim 1, characterized in that: One end of the main body (21) connected to the rainproof cap (1) is provided with a connecting portion.

3. The air inlet sampling head of the particle size spectrometer according to claim 2, characterized in that: The rainproof cap (1) comprises a first rainproof component (11), the first rainproof component (11) is in the shape of a cone, and a connecting fitting portion is provided on the plane of the cone, for fitting with the connecting portion to connect the main body (21) and the rainproof cap (1).

4. The air inlet sampling head of the particle size spectrometer according to claim 3, characterized in that: The rainproof hat (1) further comprises a second rainproof component (12), which is cylindrical and has one end connected to the plane edge of the first rainproof component (11).

5. The air inlet sampling head of the particle size spectrometer according to claim 4, characterized in that: The distance between the air inlet (212) and the tip of the first rainproof component (11) is smaller than the distance between the other end of the second rainproof component (12) and the tip of the first rainproof component (11).

6. The air inlet sampling head of the particle size spectrometer according to claim 4, characterized in that: The main body (21) is cylindrical, and its diameter is smaller than that of the second rainproof component (12).

7. The air inlet sampling head of the particle size spectrometer according to claim 1, characterized in that: One end of the main body (21) away from the rainproof cap (1) is detachably connected to a mounting cover (214), and the air outlet (211) is provided on the mounting cover (214).

8. The air inlet sampling head of the particle size spectrometer according to claim 7, characterized in that: A circular sealing ring is provided between the mounting cover (214) and the main body (21).

9. The air inlet sampling head of the particle size spectrometer according to claim 1, characterized in that: The main body (21) has at least two air flow channels (213) inside, and the number of the air outlet holes (211) is equal to the number of the air flow channels (213).

10. The air inlet sampling head of the particle size spectrometer according to claim 1, characterized in that: The diameter of the air inlet (212) is 0.2-0.3 times the diameter of the main body (21).

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