Volatile organic compound sampling device

Abstract

The utility model relates to a volatile organic compound sampling device which comprises a main body provided with an air inlet and an air outlet, and a threaded hole communicated with an inner cavity of the main body is formed in the main body; the borosilicate glass lining pipe is arranged in the main body; the sintered filter element is detachably arranged in the borosilicate glass lining pipe; the sensor is detachably in threaded connection with the threaded hole of the main body; the heating device is detachably arranged on the main body; the main body adopts a metal cylinder subjected to silanization passivation treatment, so that the adsorption of volatile organic compounds can be reduced, and the sampling result is ensured to be accurate. The heating wire is matched with the sensor, accurate dehumidification is achieved, blockage of the flow limiting hole is avoided, and stable sampling flow is guaranteed. And the 7-micron sintered filter element efficiently filters particulate matters, so that the interference on a detection result is reduced. The filter element can be repeatedly used, so that the use cost is reduced. The separated design improves the portability of the sampling device, and the sampling device is suitable for different scenes.

Description

Technical Field

[0001] This utility model relates to a volatile organic compound sampling device and belongs to the field of gas sampling technology. Background Technology

[0002] Volatile organic compounds (VOCs) are a significant component of air pollution, encompassing thousands of compounds such as formaldehyde, benzene compounds, and halogenated hydrocarbons. Their sources are complex, including exogenous pollution from industrial emissions and vehicle exhaust, as well as indoor pollution from building materials and household products. VOCs not only participate in photochemical reactions to form ozone and PM2.5, but some components also possess carcinogenic and teratogenic properties, posing a dual threat to human health and the ecological environment. Therefore, precise and efficient VOCs sampling devices are core tools for pollution source tracing, risk assessment, and pollution control optimization in fields such as environmental monitoring, occupational health, and industrial process control.

[0003] Traditional VOCs sampling devices suffer from problems such as insufficient water vapor processing capacity, poor particulate matter filtration effect, VOCs adsorption on the inner wall, fixed structure that is inconvenient to carry and maintain, lack of data storage and management functions, and poor adaptability, which limit their widespread application.

[0004] Therefore, there is a need to design a sampling device that is easy to carry and has a reusable filter. Utility Model Content

[0005] The purpose of this invention is to provide a volatile organic compound sampling device to solve the problems mentioned in the background art.

[0006] The technical solution of this utility model is as follows:

[0007] A volatile organic compound sampling device, comprising:

[0008] The main body has an air inlet and an air outlet, and a threaded hole communicating with its inner cavity is provided on the main body. A heating device is provided on the main body.

[0009] A borosilicate glass inner liner is installed inside the main body;

[0010] The sintered filter element is detachably installed inside the borosilicate glass liner tube.

[0011] The sensor is detachably threaded into the threaded hole of the main body;

[0012] A data processing terminal, equipped with a digital display panel and an operation panel, wherein the data processing terminal is provided with a DC interface and a Type-C interface;

[0013] The sensor and the heating device converge at the DC interface.

[0014] Preferably, the main body is a metal cylinder that has undergone silanization passivation treatment.

[0015] Preferably, the pore size of the sintered filter core is 7 μm.

[0016] Preferably, a polytetrafluoroethylene septum is provided between the outer wall of the sintered filter core and the inner wall of the borosilicate glass liner tube.

[0017] Preferably, the air inlet and air outlet of the main body are provided with corresponding hollow external threaded posts.

[0018] Preferably, the heating device uses a heating wire.

[0019] Preferably, the sensor includes a temperature sensor, a humidity sensor, a flow rate sensor, and a pressure sensor.

[0020] Preferably, the data processing terminal has a built-in data storage device.

[0021] This utility model has the following beneficial effects:

[0022] The main body is made of a silanized and passivated metal cylinder to reduce the adsorption of volatile organic compounds, ensuring accurate sampling results. The heating wire works in conjunction with the sensor to precisely dehumidify, preventing clogging of the flow-limiting orifice and ensuring stable sampling flow. A 7µm sintered filter element efficiently filters particulate matter, reducing interference with detection results. The filter element is reusable, reducing operating costs. The detachable design improves the portability of the sampling device, making it suitable for various scenarios. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0025] Example:

[0026] Volatile organic compound sampling devices, such as Figure 1 As shown:

[0027] The main body 3 is a metal cylinder that has undergone silanization passivation treatment, and a borosilicate glass inner liner tube 2 is fixedly installed inside it. The two ends of the main body 3 are respectively set as an air inlet 9 and an air outlet 10, which serve as the entry and exit channels for the gas sample, respectively. The air inlet 9 and the air outlet 10 are provided with corresponding 1 / 4-inch hollow external threaded posts, and the hollow external threaded posts are detachably installed in the air inlet 9 and the air outlet 10.

[0028] The borosilicate glass inner tube 2 has a straight circular tube structure and is equipped with a 7µm pore size sintered filter element 7. The sintered filter element 7 can filter the incoming and outgoing gas and remove larger particulate impurities. The sintered filter element 7 is surrounded by a polytetrafluoroethylene (PTFE) gasket 8 to improve the sealing between it and the inner wall of the borosilicate glass inner tube 2. The PTFE gasket 8 has good corrosion resistance and prevents the sintered filter element 7 from being damaged by pressure. The outer diameter of the sintered filter element 7 is smaller than the inner diameter of the air inlet 9 and the air outlet 10 of the main body 3.

[0029] Sensor 5 includes a temperature sensor, a humidity sensor, a flow rate sensor, and a pressure sensor, which can detect parameters such as temperature, humidity, gas flow rate, and pressure during the sampling process. The temperature sensor, humidity sensor, flow rate sensor, and pressure sensor can be integrated into a single unit or installed independently.

[0030] A threaded hole is provided from the outer wall of the main body 3 inward (through the borosilicate glass inner liner tube 2). If the temperature sensor, humidity sensor, flow rate sensor and pressure sensor are combined to form a sensor 5, the sensor 5 is provided with an external thread for detachable threaded connection to the threaded hole. If the temperature sensor, humidity sensor, flow rate sensor and pressure sensor are independent of each other, the number of threaded holes corresponds one-to-one with each temperature sensor, humidity sensor, flow rate sensor and pressure sensor and their respective threads are connected and matched.

[0031] The heating device 6 uses a heating wire, which can be detachably sleeved on the outer wall of the main body 3 or fixed on the inner wall of the main body 3. The heating wire can heat the gas inside the main body 3 to meet specific sampling requirements such as preventing condensation.

[0032] The data processing terminal includes a digital display panel 11, an operation panel 12, and a data storage device. The data processing terminal is equipped with a DC interface 13 and a Type-C interface 14. The digital display panel 11 can intuitively display various parameter values ​​detected by the sensor 5. The operation panel 12 is used to control the operation of the sampling device, such as the on / off switch and parameter settings of the heating device 6, and can also assign numbers to the samples. The data storage device is used to store various data.

[0033] DC interface 13 is used to combine the power supply and data of sensor 5 and heating device 6, providing them with the required DC power and data transmission; sensor 5 and heating device 6 are detachably plugged into DC interface 13.

[0034] The Type-C interface 14 can be connected to a power source to power the entire device, or it can be used as a data export interface to transfer data from the device to external devices for analysis, storage, and other operations.

[0035] The pre-set threaded hole on the main body 3 allows for the installation or removal of the sensor 5, enabling the separation of the main body 3 (used for internal filtration) and the sensor 5 for easy carrying and maintenance. When the sensor 5 is installed in the threaded hole on the main body 3, one end of the sensor 5 extends into the inner cavity of the main body 3 and the borosilicate glass inner liner tube 2.

[0036] The outer circumferential surface of the sintered filter element 7 is embedded in the inner wall of the borosilicate glass inner liner tube 2 via a polytetrafluoroethylene (PTFE) septum 8. The PTFE septum 8 has a certain elastic deformation capacity, and the hollow external threaded column is detachably connected to the air inlet 9 and air outlet 10 of the main body 3 and can be removed. After long-term use, the sintered filter element 7 can be pushed out of the borosilicate glass inner liner tube 2 by external force and ultrasonically cleaned. After drying, it can be reused. At the same time, check the sealing condition of the PTFE septum 8 and replace it in time if it is damaged.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A volatile organic compound sampling device, characterized in that, include: The main body (3) has an air inlet (9) and an air outlet (10). The main body (3) has a threaded hole communicating with its inner cavity. The main body (3) is equipped with a heating device (6). A borosilicate glass inner liner tube (2) is installed inside the main body (3); The sintered filter element (7) is detachably installed inside the borosilicate glass inner liner tube (2); The sensor (5) is detachably threaded into the threaded hole of the body (3); The data processing terminal is equipped with a digital display panel (11) and an operation panel (12), and the data processing terminal is provided with a DC interface (13) and a Type-C interface (14); The sensor (5) and the heating device (6) converge to the DC interface (13).

2. The volatile organic compound sampling device as described in claim 1, characterized in that: The main body (3) is a metal cylinder that has undergone silanization passivation treatment.

3. The volatile organic compound sampling device as described in claim 1, characterized in that: The pore size of the sintered filter core (7) is 7 μm.

4. The volatile organic compound sampling device as described in claim 1, characterized in that: A polytetrafluoroethylene septum (8) is provided between the outer wall of the sintered filter core (7) and the inner wall of the borosilicate glass inner liner tube (2).

5. The volatile organic compound sampling device as described in claim 1, characterized in that: The air inlet (9) and air outlet (10) of the main body (3) are provided with corresponding hollow external threaded columns.

6. The volatile organic compound sampling device as described in claim 1, characterized in that: The heating device (6) uses a heating wire.

7. The volatile organic compound sampling device as described in claim 1, characterized in that: The sensor (5) includes a temperature sensor, a humidity sensor, a flow rate sensor, and a pressure sensor.

8. The volatile organic compound sampling device as described in claim 1, characterized in that: The data processing terminal has a built-in data storage device.

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