Decorative material volatile organic compound testing device
The testing device for VOCs in decorative materials addresses the challenge of balancing cost and accuracy by using a sampling bag and constant flow air sampler to ensure stable airflow and prevent leakage, enhancing detection efficiency and reducing costs.
Patent Information
- Application Number
- CN202420780113.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-16
AI Technical Summary
Existing methods for detecting volatile organic compounds (VOCs) in decorative materials face challenges in balancing cost optimization with the ability to perform suction testing on large samples with lower concentrations while ensuring accuracy, particularly due to issues with headspace sampling, purge and trap devices, and environmental test chambers.
A testing device comprising a sampling bag, constant temperature box, constant flow air sampler, sampling tube, and collection pipeline, with optional features like air flow valves, sampling bag valves, and heat insulation, to ensure stable airflow and accurate gas collection, preventing leakage, and simulating actual use conditions.
The device provides accurate and efficient VOC detection by maintaining stable airflow, preventing gas leakage, and simplifying operation, thereby improving test accuracy and reducing costs.
Smart Images
Figure CN222259298U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of environmental pollutant detection equipment for construction engineering materials, and more specifically, particularly relates to a volatile organic compound testing device for decorative materials. Background Art
[0002] It has become a consensus that volatile organic compounds (VOCs) are invisible killers in indoor air and are harmful to human health. VOCs released from indoor products are one of the main sources of indoor air pollution. Controlling pollution from the source has become an important means to ensure indoor air quality. Many scholars have conducted relevant research, among which the analysis of VOCs sources in raw and auxiliary materials of indoor products is one of the key research contents. Indoor decorative materials are indispensable materials in indoor home decoration products, and their environmental quality and safety have attracted much attention. Indoor decorative materials, such as carpets, leather, wallpaper, etc., use a large number of chemicals, which continuously release toxic and harmful VOCs in daily use, causing the decorative materials to continuously pollute indoor air during use, which is one of the main sources of indoor environmental pollution VOCs. However, since there is no unified test method for VOCs in indoor decorative materials, it has become a research hotspot to establish a test method suitable for volatile organic compounds in indoor decorative materials.
[0003] Indoor decoration materials include decorative fabrics, textiles, leather, wallpaper, carpets, interior panels, etc. The corresponding VOC detection methods mainly include headspace chromatography, purge and trap method, sampling bag method, environmental chamber method, etc., and there are many types of detection equipment and devices. The main disadvantage of headspace sampling is that the headspace method is less applicable to low-concentration samples, and the sampling volume is small, so the representativeness of the test results is poor; the purge and trap device is suitable for small-dose test samples, but for some large-volume samples such as carpets and other decorative materials, the release of VOC is greatly affected by the environment, and it is necessary to simulate the actual application conditions of the samples as much as possible, otherwise the test differences will be large; the environmental test chamber and sampling bag can simulate the actual application conditions of the samples, enrich the volatile organic compounds in the samples, reduce the detection limit of the method, improve the sensitivity, and realize the detection and analysis of trace volatile organic compounds in decorative materials, but the environmental chamber equipment is expensive, the method cycle is long, the detection cost is high, and it is difficult to perform batch detection of samples. Summary of the invention
[0004] The utility model aims to provide a testing device for volatile organic compounds of decorative materials, so as to solve the technical problem in the prior art that it is difficult to balance cost optimization while being able to perform suction testing on large samples with lower concentrations and ensuring the accuracy of the detection.
[0005] In order to solve the above technical problems, the specific technical solution of a decorative material volatile organic compound testing device of the utility model is as follows:
[0006] A testing device for volatile organic compounds in decorative materials, comprising:
[0007] A sample piece, wherein the sample piece is arranged in a sampling bag; the sampling bag is arranged in a constant temperature box;
[0008] A sampling device, the sampling device comprising a constant flow air sampler, a sampling tube and a collection pipeline; the constant flow air sampler is connected to the sampling tube and the collection pipeline in sequence, the collection pipeline runs through the sample piece, and the collection pipeline draws the gas to be tested in the sample piece into the sampling tube;
[0009] A detection device is provided with a receiving portion for placing the sampling tube, and the detection device detects the gas to be detected in the sampling tube.
[0010] Optionally, an air flow valve is provided on the collection pipeline.
[0011] Optionally, the sampling bag is provided with a sampling bag valve.
[0012] Optionally, the sampling bag is provided with a plurality of circumferentially arranged hanging parts on the outside, and the hanging parts are connected to the interior of the constant temperature box via connecting parts.
[0013] Optionally, the collection pipeline is made of polyvinyl fluoride.
[0014] Optionally, the sampling tube is made of a transparent tube or a stainless steel tube.
[0015] Optionally, a portion of the thermostatic box through which the collection pipeline passes is provided with a heat insulation component.
[0016] Optionally, a suction sealing assembly is provided at the rear end of the sampling tube, and a front end of the suction sealing assembly is connected to the constant flow air sampler.
[0017] Optionally, the suction sealing assembly includes a sleeve, one end of which is connected to the rear end of the sampling tube; a sliding groove is provided on the inner wall of the sleeve, and a piston slides in the sliding groove; a suction pipeline is provided on one side of the sliding groove.
[0018] The beneficial effects of a decorative material volatile organic compound testing device provided by the present application are:
[0019] The utility model provides a stable airflow through the constant flow air sampler and the accurate collection of gas samples by the sampling tube, ensuring the accurate extraction of volatile organic compounds during the test. In addition, the excellent airtightness design of the sampling bag effectively prevents gas leakage during the test, thereby improving the accuracy of the test.
[0020] The utility model uses a sampling bag valve provided on the sampling bag to enable the tester to conveniently control the gas flow inside the sampling bag during operation, which simplifies the operation steps and improves the safety of the test. At the same time, the sampling bag is stably suspended in the constant temperature box through the hanging part and the connecting piece, which is convenient for installation and disassembly, further enhancing the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of a testing device for volatile organic compounds of decorative materials of the utility model;
[0022] Figure 2 It is a front view of a suction sealing assembly of a sampling tube of a decorative material volatile organic compound testing device of the utility model;
[0023] Figure 3 The utility model is a front view of a thermostatic box of a decorative material volatile organic compound testing device.
[0024] Description of the markings in the figure:
[0025] 1. Test piece; 2. Sampling bag; 21. Sampling bag valve; 3. Constant temperature box; 4. Sampling device; 41. Constant flow air sampler; 42. Sampling tube; 421. Suction sealing assembly; 421a. Sleeve; 421b. Sliding groove; 421c. Piston; 421d. Suction pipeline; 43. Collection pipeline; 431. Air flow valve; 5. Detection device. DETAILED DESCRIPTION
[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0030] like Figures 1 to 3 As shown, a decorative material volatile organic compound testing device provided in an embodiment of the present application comprises:
[0031] A sample 1, the sample 1 is placed in a sampling bag 2; the sampling bag 2 is placed in a constant temperature box 3;
[0032] The sampling device 4 includes a constant-flow air sampler 41, a sampling tube 42 and a collection pipeline 43; the constant-flow air sampler 41 is connected to the sampling tube 42 and the collection pipeline 43 in sequence, the collection pipeline 43 runs through the sample 1, and the collection pipeline 43 draws the gas to be tested in the sample 1 into the sampling tube 42;
[0033] The detection device 5 is provided with a receiving portion for placing the sampling tube 42 , and the detection device 5 detects the gas to be detected in the sampling tube 42 .
[0034] The utility model provides a testing device for volatile organic compounds of decorative materials. Compared with the prior art, the utility model places a sample 1 (sample 1 represents the decorative material to be tested, such as decorative fabrics, textiles, leather, wallpaper, carpets, interior panels, etc.) into a sampling bag 2. The sampling bag 2 is made of a material with excellent air tightness to ensure that there is no leakage during the test. The sampling bag 2 is further placed in a constant temperature box 3, which can control and maintain a certain temperature to simulate the temperature conditions of the decorative materials in the actual use environment. The utility model uses a constant flow air sampler 41 to provide a stable airflow, a sampling tube 42 to collect gas samples, and a collection pipeline 43 to connect the sampling tube 42 and the sample 1, so that the airflow can suck the volatile organic compounds released from the sample 1 into the sampling tube 42 through the collection pipeline 43.
[0035] In another embodiment of the present application, Figure 1 As shown, an air flow valve 431 is provided on the collection pipeline 43.
[0036] In another embodiment of the present application, Figure 1As shown, the sampling bag 2 is provided with a sampling bag valve 21. The introduction of the sampling bag valve 21 makes the operation of the sampling bag 2 during the test more convenient and safe. Specifically, the sampling bag valve 21 is a device that can control the flow of gas inside the sampling bag 2. During the test, by opening or closing the sampling bag valve 21, we can conveniently control the exchange of gas in the sampling bag 2 with the outside world. After the test, we can prevent the gas in the sampling bag 2 from leaking out by closing the sampling bag valve 21, thereby ensuring the accuracy of the test results. In addition, the sampling bag valve 21 also has a certain sealing performance, which can prevent external gas from entering the sampling bag 2 to a certain extent, thereby reducing the test error. At the same time, the sampling bag valve 21 is easy to operate and can be opened or closed quickly, which greatly improves the test efficiency.
[0037] In another embodiment of the present application, Figure 3 As shown, the sampling bag 2 is provided with a plurality of hanging parts 22 arranged circumferentially, and the hanging parts 22 are connected to the interior of the thermostat 3 through a connecting piece 23. Figure 3 As shown, the outside of the sampling bag 2 is provided with a plurality of hanging parts 22 arranged circumferentially, and these hanging parts 22 are connected to the inside of the thermostat 3 through the connecting piece 23, so as to ensure the stable suspension of the sampling bag 2 in the thermostat 3. Specifically, the hanging parts 22 are small rings, hooks or similar structures designed on the outside of the sampling bag 2, which are evenly distributed along the circumference of the sampling bag 2, so that the sampling bag 2 can be evenly stressed. The connecting piece 23 is a component connecting the hanging parts 22 and the inside of the thermostat 3, which can be made of a material with sufficient strength and stability, such as a thin rope, a chain, a metal rod, etc. This fixing method is not only simple and easy, but also can effectively prevent the sampling bag 2 from moving or deforming in the thermostat 3, so as to ensure the accuracy and reliability of the test. At the same time, due to the design of the hanging parts 22 and the connecting piece 23, the sampling bag 2 can be easily taken out and put in the thermostat 3, which is convenient for multiple tests or replacement of samples.
[0038] In another embodiment of the present application, Figure 1 As shown, the collection pipeline 43 is made of polyvinyl fluoride. The reason is that polyvinyl fluoride material has excellent chemical stability and corrosion resistance, which can ensure the accuracy of the test results.
[0039] In another embodiment of the present application, Figure 1 As shown, the sampling tube 42 is made of a transparent tube or a stainless steel tube, so as to observe and record the situation during the sampling process. In order to ensure the temperature stability during the sampling process.
[0040] In another embodiment of the present application, Figure 1As shown, the portion of the thermostat 3 through which the collection pipeline 43 passes is provided with a heat insulation component. The main function of the heat insulation component is to reduce the heat inside the thermostat 3 from being lost to the outside through the collection pipeline 43, thereby maintaining the temperature inside the thermostat 3 stable. This is essential to ensure that the sample 1 releases volatile organic compounds under constant temperature conditions during the test. The heat insulation component can be implemented using a variety of materials and technologies. For example, a high thermal resistance material (such as ceramic fiber, aerogel, etc.) can be used to wrap the collection pipeline 43 to form an insulation layer to reduce heat transfer. In addition, vacuum insulation technology can also be used to further reduce heat conduction by forming a vacuum layer between the collection pipeline 43 and the heat insulation component. The introduction of the heat insulation component not only improves the thermal insulation performance of the thermostat 3, but also helps to reduce energy consumption and testing costs. At the same time, since the temperature of the collection pipeline 43 is effectively controlled, the accuracy and stability of the test results are also further improved.
[0041] In another embodiment of the present application, Figure 2 As shown, a suction sealing component 421 is provided at the rear end of the sampling tube 42, and the front end of the suction sealing component 421 is connected to the constant flow air sampler 41. Specifically, a suction sealing component 421 is provided at the rear end of the sampling tube 42, and the front end of this component is connected to the constant flow air sampler 41. The main function of the suction sealing component 421 is that when the constant flow air sampler 41 completes the suction, the suction sealing component 421 can automatically seal the rear end of the sampling tube 42, so that the sampling tube 42 maintains a negative pressure, thereby completing the sampling of the sampling bag 2.
[0042] In another embodiment of the present application, Figure 2 As shown, the suction seal assembly 421 includes a sleeve 421a, one end of which is connected to the rear end of the sampling tube 42; the inner wall of the sleeve 421a is provided with a sliding groove 421b, and a piston 421c slides in the sliding groove 421b; and a suction pipeline 421d is provided on one side of the sliding groove 421b. Figure 2 As shown. Its working principle is as follows: when the constant flow air sampler 41 is working, it sucks the sampling tube 42 through the suction pipeline 421d, so that a negative pressure is formed in the sampling tube 42, thereby realizing the collection of the gas in the sampling bag 2. During the suction process, the piston 421c will slide in the sliding groove 421b according to the suction force. When the constant flow air sampler 41 completes the suction and stops working, the piston 421c will automatically slide to the appropriate position to seal the rear end of the sampling tube 42. In this way, the sampling tube 42 can maintain a negative pressure state to prevent external gas from entering, thereby ensuring the accuracy and reliability of sampling; the design of the suction sealing assembly 421 not only improves the sealing and accuracy of the sampling process, but also makes the sampling operation more convenient and efficient. It can automatically seal the rear end of the sampling tube 42 after the sampling is completed, without manual operation, reducing the difficulty of operation and the error rate.
[0043] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.
Claims
1. A testing device for volatile organic compounds in decorative materials, characterized in that: include: A sample piece, wherein the sample piece is arranged in a sampling bag; the sampling bag is arranged in a constant temperature box; A sampling device, the sampling device comprising a constant flow air sampler, a sampling tube and a collection pipeline; the constant flow air sampler is connected to the sampling tube and the collection pipeline in sequence, the collection pipeline runs through the sample piece, and the collection pipeline draws the gas to be tested in the sample piece into the sampling tube; A detection device is provided with a receiving portion for placing the sampling tube, and the detection device detects the gas to be detected in the sampling tube.
2. A decorative material volatile organic compound testing device according to claim 1, characterized in that: The collection pipeline is provided with an air flow valve.
3. A decorative material volatile organic compound testing device according to claim 1, characterized in that: The sampling bag is provided with a sampling bag valve.
4. A decorative material volatile organic compound testing device according to claim 1, characterized in that: The sampling bag is provided with a plurality of hanging parts arranged circumferentially outside, and the hanging parts are connected to the inside of the constant temperature box through connecting parts.
5. The volatile organic compound testing device for decorative materials according to claim 1, characterized in that: The collection pipeline is made of polyvinyl fluoride.
6. A decorative material volatile organic compound testing device according to claim 1, characterized in that: The sampling tube is made of a transparent tube or a stainless steel tube.
7. A decorative material volatile organic compound testing device according to claim 1, characterized in that: The portion of the thermostatic box through which the collection pipeline passes is provided with a heat insulation component.
8. A decorative material volatile organic compound testing device according to claim 1, characterized in that: A suction sealing component is provided at the rear end of the sampling tube, and a front end of the suction sealing component is connected to the constant flow air sampler.
9. A decorative material volatile organic compound testing device according to claim 8, characterized in that: The suction sealing assembly comprises a sleeve, one end of which is connected to the rear end of the sampling tube; a sliding groove is provided on the inner wall of the sleeve, a piston slides in the sliding groove; and a suction pipeline is provided on one side of the sliding groove.