TVOC continuous automatic sampling device

Abstract

The application discloses a TVOC continuous automatic sampling device, which comprises a climate box, a collection box and a gas sampling unit. The climate box is used for placing building thermal insulation materials to be detected. The collection box is internally provided with a transmission track, and a limiting device is arranged on the transmission track and used for placing an adsorption column. The climate box is connected to the collection box through a first gas sampling pipeline. The gas sampling unit comprises a gas sampling pump, and the gas sampling pump is connected to the collection box through a second gas sampling pipeline. The application has the advantages that the sampling of TVOC compounds in batch building thermal insulation products can be realized.

Description

Technical Field

[0001] This application relates to the field of materials testing technology, and in particular to a TVOC continuous automatic sampling device. Background Technology

[0002] Thermal insulation materials play a crucial role in building energy conservation. With increasing environmental awareness, higher demands are being placed on the environmental performance of these materials. Total volatile organic compounds (TVOCs) in building insulation materials easily volatilize into the air at normal temperature and pressure. Excessive levels of these substances can emit irritating odors and cause various health problems. For example, VOCs such as formaldehyde and benzene can disrupt the immune system, affect the central nervous system and digestive system, and in severe cases, damage the liver and hematopoietic cells. Therefore, testing for volatile substances in building insulation products helps protect the health of residents. Extracting and testing target TVOC compounds from building insulation products requires simulating the release environment using a climate chamber, necessitating the use of adsorption columns for sampling. Currently, automated equipment is lacking for TVOC sampling, hindering the accurate and rapid detection of TVOC compounds in building insulation products. Summary of the Invention

[0003] This application provides a TVOC continuous automatic sampling device, which has the advantage of enabling batch sampling of TVOC compounds in building insulation products.

[0004] The above-mentioned objective of this application is achieved through the following technical solution: a TVOC continuous automatic sampling device, comprising a climate chamber, a collection chamber, and a gas sampling unit; the climate chamber is used to place the building insulation material to be tested; the collection chamber is provided with a conveyor belt, and a limiting device is provided on the conveyor belt, the limiting device being used to place an adsorption column; the climate chamber is connected to the collection chamber through a first gas sampling pipeline, and the gas sampling unit includes a gas sampling pump, the gas sampling pump being connected to the collection chamber through a second gas sampling pipeline.

[0005] Furthermore, the limiting device includes several grooves disposed on the transmission track.

[0006] Furthermore, the limiting device also includes limiting chains disposed on both sides of the conveyor belt, the limiting chains being used to place the end caps at both ends of the adsorption column.

[0007] Furthermore, the limiting chain has a bent section that protrudes outward from the conveyor belt. The location of the bent section is the gas sampling position. When the adsorption column moves to the gas sampling position, the end caps at both ends are opened by the limiting chain.

[0008] Furthermore, the first gas sampling pipeline extends to one end of the adsorption column at the gas sampling location, and the second gas sampling pipeline extends to the other end of the adsorption column at the gas sampling location.

[0009] Furthermore, a storage box is provided downstream of the transmission track, and a ramp is provided on one side of the storage box to connect to the transmission track.

[0010] Furthermore, the first or second gas sampling pipeline is equipped with a flow meter, a pressure gauge, and a thermometer.

[0011] In summary, the beneficial effects of this application are as follows:

[0012] 1. This application enables the mass sampling of TVOC compounds in building insulation products;

[0013] 2. This application uses a conveyor belt to move the adsorption column and a limiting chain to control the opening and closing of the end caps at both ends of the adsorption column, achieving fully automated sampling of multiple adsorption columns and improving sampling efficiency.

[0014] 3. This application can detect pressure, flow rate and temperature during the sampling process, and is used to monitor the sampling quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0016] Figure 2 This is a schematic diagram of the groove in an embodiment of this application;

[0017] Figure 3 This is a top-view schematic diagram of an embodiment of this application;

[0018] Figure 4 This is a schematic diagram of the gas sampling location in an embodiment of this application.

[0019] In the diagram, 100 is the climate chamber; 200 is the collection box; 201 is the transmission track; 202 is the groove; 203 is the limiting chain; 204 is the bend; 205 is the storage box; 300 is the gas collection unit; 400 is the adsorption column; 500 is the first gas collection pipeline; and 600 is the second gas collection pipeline. Detailed Implementation

[0020] The specific embodiments of this application are described in detail below with reference to the accompanying drawings.

[0021] Example: A TVOC continuous automatic sampling device, reference Figure 1-4 It includes a climate chamber, a collection chamber, and a gas extraction unit.

[0022] The climate chamber is used to hold the building insulation material to be tested, and has an air outlet on one side.

[0023] The collection box contains a horizontally arranged conveyor belt. A limiting device is provided on the conveyor belt for placing the adsorption column. The limiting device includes several grooves on the conveyor belt, each groove having an arc-shaped cross-section adapted to the shape of the adsorption column, for placing and fixing the adsorption column. These grooves can be integral grooves on the conveyor belt, or a single groove structure equidistantly fixed to the conveyor belt. The width of the conveyor belt is no greater than the width of the adsorption column, and when the adsorption column is placed on the conveyor belt, the end caps at both ends can extend out of the conveyor belt.

[0024] It should be noted that the adsorption column involved in this application refers to an adsorption column used for adsorbing TVOC compounds, which is an existing product with removable plugs at both ends. The adsorption column in this application includes all existing products that are compatible with thermal desorbers (typically such as the TD100 series thermal desorbers). All are compatible with the TVOC continuous automatic sampling device proposed in this application.

[0025] The limiting device also includes limiting chains located on both sides of the conveyor belt. These limiting chains are selected from chain mechanisms of a certain width, such as chain-grooved conveyor belts, to accommodate the adsorption column. Alternatively, the limiting chains may have U-shaped grooves for accommodating the adsorption column. The limiting chains are used to hold the end caps of the adsorption column. Guide rails are provided on both sides of the conveyor belt to accommodate the limiting chains. The limiting chains move synchronously with the conveyor belt, embedding themselves into the grooves on the end caps of the adsorption column. The limiting chains have a bent section protruding outwards from the conveyor belt; this bent section is located at the gas sampling position. When the adsorption column moves to the gas sampling position, the end caps are opened by the limiting chains. As the adsorption column continues to move along the conveyor belt, the limiting chains automatically close the end caps.

[0026] The climate chamber is connected to the collection chamber via a first gas sampling pipeline. The gas sampling unit includes a gas sampling pump, which is connected to the collection chamber via a second gas sampling pipeline. The first gas sampling pipeline extends to one end of the adsorption column at the gas sampling location, and the second gas sampling pipeline extends to the other end of the adsorption column at the gas sampling location. The first gas sampling pipeline and the second gas sampling pipeline are directly opposite the adsorption column with its end cap open for gas sampling. Figure 4 As shown, in order to avoid interference with the end caps of the adsorption column, the first or second gas sampling pipeline extends to both ends of the adsorption column in a bent manner.

[0027] A storage box is provided downstream of the transmission track, and a ramp is provided on one side of the storage box to connect to the transmission track.

[0028] The first or second gas sampling pipeline is equipped with a flow meter, a pressure gauge and a thermometer.

[0029] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of this application, and these all fall within the protection scope of this application.

Claims

1. A TVOC continuous automatic sampling device, characterized in that, It includes a climate chamber, a collection chamber, and a gas sampling unit; the climate chamber is used to place the building insulation material to be tested; the collection chamber is equipped with a conveyor belt, and the conveyor belt is equipped with a limiting device, which is used to place the adsorption column; the climate chamber is connected to the collection chamber through a first gas sampling pipeline, and the gas sampling unit includes a gas sampling pump, which is connected to the collection chamber through a second gas sampling pipeline.

2. The TVOC continuous automatic sampling device according to claim 1, characterized in that, The limiting device includes several grooves disposed on the transmission track.

3. The TVOC continuous automatic sampling device according to claim 2, characterized in that, The limiting device also includes limiting chains disposed on both sides of the transmission track, the limiting chains being used to place the end caps at both ends of the adsorption column.

4. The TVOC continuous automatic sampling device according to claim 3, characterized in that, The limiting chain has a bent section that protrudes outward from the conveyor belt. The location of the bent section is the gas sampling position. When the adsorption column moves to the gas sampling position, the end caps at both ends are opened by the limiting chain.

5. The TVOC continuous automatic sampling device according to claim 4, characterized in that, The first gas sampling pipeline extends to one end of the adsorption column at the gas sampling location, and the second gas sampling pipeline extends to the other end of the adsorption column at the gas sampling location.

6. The TVOC continuous automatic sampling device according to claim 1, characterized in that, A storage box is provided downstream of the transmission track, and a ramp is provided on one side of the storage box to connect to the transmission track.

7. The TVOC continuous automatic sampling device according to claim 1, characterized in that, The first or second gas sampling pipeline is equipped with a flow meter, a pressure gauge and a thermometer.

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