Device for detecting mass concentration of atmospheric particulate matter

Abstract

This utility model discloses a device for detecting the mass concentration of suspended particulate matter in the atmosphere, belonging to the field of gas detection technology. It features a long cylindrical ventilation box as its main body, with an internal ventilation channel. The detection head is fixed inside the ventilation box along the gas flow direction, with its end facing the ventilation direction, enabling precise capture of particulate matter. A fixing frame installed inside the ventilation box consists of a circular plate and circumferential claws. The circular plate is fixed to the inner wall of the channel by the claws, allowing gas to flow smoothly through the gaps between adjacent claws. A blower is located on the side of the fixing frame away from the detection head, with its blowing direction aligned with the airflow direction. This enhances power, allowing more particulate-containing gas to quickly flow through the detection head, significantly improving detection efficiency and sensitivity.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, specifically to a device for detecting the mass concentration of suspended particulate matter in the atmosphere. Background Technology

[0002] With rapid industrial development and urbanization, particulate matter pollution in the atmosphere has become increasingly serious, affecting not only air quality but also human health and the ecological environment. Accurate detection of the concentration of particulate matter in the atmosphere is a crucial prerequisite for pollution control and environmental assessment. Existing detection devices are often affected by unstable water vapor and gas flow, as well as interference from external impurities, resulting in insufficient detection accuracy and stability. Furthermore, some devices have unreasonable structural designs, and their ease of installation and use needs improvement. Utility Model Content

[0003] To address the aforementioned technical shortcomings, the purpose of this utility model is to provide a device for detecting the mass concentration of suspended particulate matter in the atmosphere. This device, with a long cylindrical ventilation box as its main body and equipped with components such as a detection head and heating wire, can reduce interference, improve efficiency and stability, and is suitable for detecting the mass concentration of suspended particulate matter in the atmosphere in various scenarios.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a device for detecting the mass concentration of suspended particulate matter in the atmosphere, comprising:

[0005] A ventilation box, which is long and cylindrical, has ventilation channels inside.

[0006] The detection head is fixed inside the ventilation box along the gas flow direction of the ventilation channel, and the end of the detection head is oriented opposite to the ventilation direction of the ventilation channel.

[0007] The ventilation box has a heating wire on its inner wall, and the heating wire is annularly mounted on the outside of the detection head.

[0008] Preferably, a fixing frame is installed inside the ventilation box. The fixing frame includes a circular plate and claws arranged circumferentially on the outside of the circular plate. The circular plate is fixed to the inner wall of the ventilation channel by the claws, and the gas passes through the gap between adjacent claws.

[0009] Preferably, a blower is fixed inside the ventilation box, and the blowing direction of the blower is the same as the gas flow direction of the ventilation channel. The blower is installed on the side of the mounting frame away from the detection head.

[0010] Preferably, an annular groove is formed on the inner wall of the ventilation box, and the heating wire is embedded inside the annular groove.

[0011] Preferably, the detection head is fixed with a protective cover, and the surface of the protective cover is provided with a plurality of ventilation holes.

[0012] Preferably, a baffle is fixed at the outlet of the ventilation channel, which can seal the outlet of the ventilation channel when the fan is stopped.

[0013] Preferably, the baffle comprises a plurality of circumferentially arranged flexible plates, and a sealing strip is provided at the connection position of adjacent flexible plates.

[0014] Preferably, the ventilation box is fixed on the bracket.

[0015] Preferably, the detection head is connected to an external power supply unit via a wire that passes through a ventilation shaft and a bracket.

[0016] Preferably, a gap is provided between the protective cover and the heating wire.

[0017] The beneficial effects of this utility model are as follows:

[0018] The heating wire effectively removes moisture interference, and the annular groove ensures uniform and stable heating. The baffle and the protective cover work together to block external impurities, and the gap design between the protective cover and the heating wire prevents the protective cover from overheating and affecting the detection. Multiple steps ensure a clean detection environment and improve the reliability of the results.

[0019] The fixed frame ensures smooth gas flow, and the blower enhances airflow power, allowing more particulate-containing gas to flow quickly through the detection head, thus improving detection efficiency and sensitivity. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the detection device.

[0021] Figure 2 This is an internal view of the ventilation box.

[0022] Figure 3 This is a diagram showing the connection between the ventilation box and the blower.

[0023] Figure 4 This is an external view of the ventilation box.

[0024] Figure 5 This is a connection diagram of the ventilation box and the mounting bracket.

[0025] Figure 6 This is a structural diagram of the protective cover.

[0026] In the diagram: 1. Ventilation box, 101. Ventilation duct, 2. Detection head, 3. Heating wire, 4. Fixture, 5. Blower, 6. Baffle, 7. Protective cover. Detailed Implementation

[0027] The present invention is illustrated below with specific embodiments, but these are not intended to limit the scope of the invention.

[0028] Example 1

[0029] like Figures 1-6 As shown in this embodiment, a device for detecting the mass concentration of suspended particulate matter in the atmosphere is provided, including a ventilation box 1 and a detection head 2.

[0030] The ventilation box 1 is a long cylindrical shape with an internal ventilation channel 101.

[0031] The detection head 2 is fixed inside the ventilation box 1 along the gas flow direction of the ventilation channel 101, with its end facing the ventilation direction of the ventilation channel 101.

[0032] A heating wire 3 is installed on the inner wall of the ventilation box 1, and the heating wire 3 is annularly sleeved on the outside of the detection head 2. The ventilation box 1 forms a long cylindrical ventilation channel 101, allowing air containing suspended particulate matter to flow along the ventilation channel 101. The detection head 2 is fixed inside the ventilation box 1, with its end facing the direction of gas flow. When gas flows through the detection head 2, the detection head 2 can detect the mass concentration of suspended particulate matter. At the same time, the heating wire 3 annularly sleeved on the inner wall of the ventilation box 1 can heat the detection head 2 and the surrounding area, reducing interference from moisture and other factors on the detection.

[0033] Ventilation box 1 provides space for gas flow and component installation; detection head 2 is the core detection component, enabling the measurement of suspended particulate matter mass concentration; heating wire 3 removes the influence of water vapor through heating, improving the accuracy and stability of detection.

[0034] The ventilation box 1 is fixed on the bracket, which provides support for the ventilation box 1, so that the ventilation box 1 can be stably placed at the required testing position, maintaining the normal posture of the ventilation channel 101, facilitating the smooth flow of gas and the conduct of the testing work.

[0035] The bracket serves to support and fix the ventilation box 1, ensuring the stability of the entire device during the testing process and preventing the detection accuracy of the detection head 2 from being affected by device shaking. It also facilitates the placement and installation of the device in different locations.

[0036] The detection head 2 is connected to an external power supply unit via wires. The wires pass through the ventilation box 1 and the bracket to form a complete circuit loop. The external power supply unit provides the power required for the operation of the detection head 2 via the wires, ensuring that the detection head 2 can operate normally.

[0037] The wire serves as the power transmission channel, ensuring that the detection head 2 receives a continuous and stable power supply, enabling it to perform the detection of suspended particulate matter concentration normally. The design of the wire passing through the ventilation box 1 and the bracket makes the wiring layout more organized and reduces external interference.

[0038] A gap is reserved between the protective cover 7 and the heating wire 3 to prevent the protective cover 7 from directly contacting the heating wire 3 and to prevent the heat of the heating wire 3 from being excessively conducted to the protective cover 7. At the same time, it also provides space for the gas to flow between the protective cover 7 and the heating wire 3, so that the heated gas can come into contact with the detection head 2 more smoothly.

[0039] Function: The reserved gap prevents the protective cover 7 from being damaged due to excessive heat, thus extending the service life of the protective cover 7; at the same time, it ensures the flow of gas in the heating area and around the detection head 2, so that the heated gas can better act on the detection process and improve the accuracy of the detection.

[0040] Example 2

[0041] like Figures 1-6 As shown, based on Embodiment 1, this embodiment provides a device capable of achieving the corresponding function, as detailed below:

[0042] A mounting bracket 4 is installed inside the ventilation box 1. The mounting bracket 4 includes a circular plate and circumferentially arranged claws on the outside of the circular plate. The circular plate is fixed to the inner wall of the ventilation channel 101 by the claws. Gas passes through the gaps between adjacent claws. The circular plate of the mounting bracket 4 is fixed to the inner wall of the ventilation channel 101 by the circumferentially arranged claws, so that the mounting bracket 4 is securely installed. Since the gas passes through the gaps between adjacent claws, the presence of the mounting bracket 4 will not block the gas flow, ensuring that the gas can smoothly reach the detection head 2.

[0043] The fixing bracket 4 serves as a fixed support, ensuring the stable installation position of the detection head 2 and other related components within the ventilation box 1. At the same time, the gap design between adjacent claws ensures smooth gas flow and does not affect the detection process.

[0044] The ventilation box 1 is equipped with a blower 5. The blowing direction of the blower 5 is the same as the gas flow direction of the ventilation channel 101. The blower 5 is installed on the side of the fixed frame 4 away from the detection head 2. It can actively push the gas in the atmosphere to flow along the ventilation channel 101 to the detection head 2, increase the gas velocity and flow rate, and allow more gas containing suspended particulate matter to pass through the detection head 2.

[0045] The blower 5 enhances the flow dynamics of gas within the ventilation channel 101, improving the contact efficiency between the gas and the detection head 2. This helps the detection head 2 acquire samples more quickly and fully, improving detection efficiency and sensitivity. An annular groove is formed on the inner wall of the ventilation box 1, and the heating wire 3 is embedded inside the annular groove. This provides a mounting position for the heating wire 3, allowing it to be securely fixed and ensuring it surrounds the detection head 2 more evenly, resulting in a more uniform heat distribution during heating.

[0046] The annular groove serves to fix and position the heating wire 3, preventing it from shifting during device operation and ensuring the stability and uniformity of the heating effect, thereby guaranteeing the effectiveness of heating in improving the detection environment. A protective cover 7 is fixed to the outside of the detection head 2. The surface of the protective cover 7 has several vent holes, allowing gas to enter the interior of the protective cover 7 and contact the detection head 2. Simultaneously, the protective cover 7 can prevent larger impurities or foreign objects from directly impacting the detection head 2.

[0047] The protective cover 7 serves to protect the detection head 2, preventing it from being damaged by larger impurities and extending its service life; the vent ensures that gas and suspended particles in it can smoothly enter the protective cover 7 and come into contact with the detection head 2 without affecting the normal operation of the detection.

[0048] Example 3

[0049] like Figures 1-6 As shown, based on Embodiment 1 and Embodiment 2, this embodiment provides a device capable of achieving the corresponding function, as detailed below:

[0050] A baffle 6 is fixed at the outlet of the ventilation duct 101. When the fan is stopped, the baffle 6 can seal the outlet of the ventilation duct 101 to prevent unfiltered or irrelevant external gases and impurities from entering the ventilation duct 101 from the outlet. When the fan is working, the pressure generated by the gas flow will push the baffle 6 open, allowing the gas to be discharged smoothly from the outlet.

[0051] The baffle 6 seals the outlet when the fan stops working, preventing external pollutants from entering the ventilation channel 101 and contaminating the detection head 2 or affecting the accuracy of the next detection; when the fan is working, it does not obstruct the gas exhaust, ensuring normal ventilation of the ventilation channel 101.

[0052] The baffle 6 comprises multiple circumferentially arranged flexible plates, with sealing strips at the joints of adjacent flexible plates to enhance sealing performance. When the fan stops, the flexible plates adhere to each other under their own properties and external pressure, achieving a seal; when the fan operates, the gas pushes the flexible plates, causing them to deform and open the outlet. After the gas is discharged, the flexible plates return to their adhered state.

[0053] The flexible plate design allows the baffle 6 to open and close automatically according to the gas flow state, while the sealing strip improves the reliability of the seal, further prevents external impurities from entering, ensures the cleanliness of the internal environment of the device, and ensures the accuracy of the test results.

[0054] Working principle:

[0055] The detection device consists of a long cylindrical ventilation box 1 as its main body, with an internal ventilation channel 101 for the flow of air containing suspended particulate matter. The detection head 2 is fixed inside the ventilation box 1, with its end facing the direction of gas flow, allowing direct detection of the mass concentration of suspended particulate matter passing through. A heating wire 3 is annularly sleeved on the inner wall of the ventilation box 1 outside the detection head 2. Heating reduces interference from moisture on the detection, and the heating wire 3 is embedded in an annular groove to ensure uniform and stable heating.

[0056] The ventilation box 1 is fixed on the bracket to ensure the stability of the overall structure; the detection head 2 is connected to the external power supply unit through wires, which pass through the ventilation box 1 and the bracket to form a power supply circuit. The protective cover 7 is fixed to the outside of the detection head 2, and the vent holes on the surface ensure that the gas contacts the detection head 2 while blocking large impurities. A gap is reserved between the protective cover 7 and the heating wire 3 to prevent the protective cover 7 from overheating.

[0057] The mounting bracket 4 is fixed to the inner wall of the channel by a circular plate and claws, without obstructing gas flow; the blower 5 is installed on the side of the mounting bracket 4 away from the detection head 2 to enhance the gas flow dynamics. In embodiment three, the baffle 6 is located at the outlet of the ventilation channel 101. When the fan stops, it seals the channel to prevent impurities from entering. When in operation, it is pushed open by gas pressure. Its flexible plate and sealing strip design improves the flexibility of sealing and opening / closing.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model.

Claims

1. A device for detecting the mass concentration of suspended particulate matter in the atmosphere, characterized in that, include: Ventilation box (1), the ventilation box (1) is a long cylindrical shape, and the ventilation box (1) is provided with a ventilation channel (101) inside. The detection head (2) is fixed inside the ventilation box (1) along the gas flow direction of the ventilation channel (101), and the end of the detection head (2) is oriented opposite to the ventilation direction of the ventilation channel (101). The ventilation box (1) has a heating wire (3) on its inner wall, and the heating wire (3) is annularly mounted on the outside of the detection head (2).

2. The device for detecting the mass concentration of suspended particulate matter in the atmosphere according to claim 1, characterized in that, The ventilation box (1) is equipped with a fixing frame (4), which includes a circular plate and claws arranged circumferentially on the outside of the circular plate. The circular plate is fixed to the inner wall of the ventilation channel (101) by the claws, and the gas passes through the gap between adjacent claws.

3. The device for detecting the mass concentration of suspended particulate matter in the atmosphere according to claim 2, characterized in that, The ventilation box (1) is equipped with a blower (5) inside. The blowing direction of the blower (5) is the same as the gas flow direction of the ventilation channel (101). The blower (5) is installed on the side of the fixed frame (4) away from the detection head (2).

4. The device for detecting the mass concentration of suspended particulate matter in the atmosphere according to claim 1, characterized in that, The ventilation box (1) has an annular groove on its inner wall, and the heating wire (3) is embedded in the annular groove.

5. The device for detecting the mass concentration of suspended particulate matter in the atmosphere according to claim 1, characterized in that, The detection head (2) is fixed with a protective cover (7) on the outside, and the surface of the protective cover (7) is provided with several ventilation holes.

6. The device for detecting the mass concentration of suspended particulate matter in the atmosphere according to claim 3, characterized in that, A baffle (6) is fixed at the outlet of the ventilation channel (101). When the fan is stopped, the baffle (6) can seal the outlet of the ventilation channel (101).

7. The device for detecting the mass concentration of suspended particulate matter in the atmosphere according to claim 6, characterized in that, The baffle (6) includes multiple circumferentially arranged flexible plates, and a sealing strip is provided at the connection position of adjacent flexible plates.

8. The device for detecting the mass concentration of suspended particulate matter in the atmosphere according to claim 1, characterized in that, The ventilation box (1) is fixed on the bracket.

9. The device for detecting the mass concentration of suspended particulate matter in the atmosphere according to claim 8, characterized in that, The detection head (2) is connected to an external power supply unit via a wire that passes through a ventilation and a bracket.

10. The device for detecting the mass concentration of suspended particulate matter in the atmosphere according to claim 5, characterized in that, A gap is reserved between the protective cover (7) and the heating wire (3).

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