Device for testing concentration attenuation process of volatile harmful substances in coating

Abstract

The utility model discloses a device for testing the concentration attenuation process of volatile harmful substances in coating, which relates to the technical field of indoor environment, and comprises a simulation cabin, a sample plate, a collector and an analyzer, the simulation cabin is used for simulating the indoor environment, the sample plate is arranged in the simulation cabin, the sample plate is coated with the coating to be tested, and the collector is connected with the analyzer. The collector is communicated with the interior of the simulation cabin, the collector can collect gas in the simulation cabin, the analyzer is communicated with the collector, and the analyzer can analyze the concentration of organic volatile substances in the gas collected by the collector; according to the device for testing the concentration attenuation process of the volatile harmful substances in the coating disclosed by the utility model, the condition of pollutants on an indoor decoration site can be preliminarily estimated.

Description

Technical Field

[0001] The utility model relates to the technical field of indoor environment, in particular to a device for testing the concentration attenuation process of volatile harmful substances in coatings. Background Art

[0002] As an interior decoration material, household interior wall paint is one of the important components of indoor environmental pollutants. There are many harmful substances in the paint, which are mainly divided into volatile harmful substances and non-volatile substances. Non-volatile substances mainly include soluble heavy metals such as cadmium, chromium, mercury and lead. Such pollutants are mainly contact pollution and play a major role during construction. In normal use, paint pollution is mainly composed of volatile harmful substances. Volatile harmful substances are mainly volatile substances such as benzene, toluene, xylene, and formaldehyde and other organic substances.

[0003] After the indoor painting construction is completed, "how long does it take for pollutants to evaporate" or "to what extent do pollutants decay before they are suitable for occupancy" are questions that owners want to know. At present, various indoor decoration and renovation materials have their own product standards, which mandate the detection of the concentration of their harmful substances. After the construction of these materials, there are also acceptance standards to detect the concentration of pollutants in the indoor environment. The acceptance standard measurement period is seven days after the completion of the project, but seven days is often not enough for volatile harmful substances to evaporate to a safe concentration level, resulting in excessive indoor environmental results; when the qualified concentration can be reached can only be known after multiple measurements of the indoor environment. On the one hand, such measurements require multiple on-site sampling, which wastes time and energy. GB50325-2020 "Standards for Indoor Environmental Pollution Control of Civil Construction Projects" stipulates that if the first failure is unqualified, the number of sampling points will be doubled. If this standard is implemented, more costs will be incurred. Utility Model Content

[0004] The purpose of the utility model is to provide a device for testing the attenuation process of the concentration of volatile harmful substances in coatings, so as to solve the problems existing in the above-mentioned prior art and to achieve a preliminary estimation of the pollutant situation at an indoor decoration site.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The utility model provides a device for testing the attenuation process of the concentration of volatile harmful substances in paint, comprising a simulation cabin, a sample plate, a collector and an analyzer, wherein the simulation cabin is used to simulate an indoor environment, the sample plate is placed in the simulation cabin, the sample plate is coated with the tested paint, the collector is connected to the interior of the simulation cabin, the collector can collect the gas in the simulation cabin, the analyzer is connected to the collector, and the analyzer can analyze the concentration of organic volatile substances in the gas collected by the collector.

[0007] Preferably, it further comprises a sample rack, which is placed in the simulation chamber and is used to carry the sample plate.

[0008] Preferably, the tested coating is coated on both surfaces of the sample plate.

[0009] Preferably, there are two sample plates, and the two sample plates are placed in parallel.

[0010] Preferably, the sample plate is placed at an angle.

[0011] Preferably, the sample plate is a ceramic tile.

[0012] Compared with the prior art, the utility model has achieved the following technical effects:

[0013] The utility model provides a device for testing the attenuation process of the concentration of volatile harmful substances in coatings. A simulation cabin is set to simulate an indoor environment, specifically simulates an indoor decoration environment. The tested coating is coated on a sample plate, the sample plate is placed in the simulation cabin, a collector is used to collect gas in the simulation cabin, an analyzer is used to analyze the gas collected by the collector, the same batch of coatings as those at the construction site are used as samples to perform a test sample under the same conditions, and after sampling, result data of the samples under the same conditions are analyzed to obtain data related to the concentration of volatile harmful substances, and a graph is drawn to study its trend, to judge the attenuation process of the concentration of volatile harmful substances in the coating and the time when the concentration of volatile harmful substances in the coating reaches a safe concentration, and based on the determination of the time, a preliminary estimate of the on-site pollutant situation is made, to form a reference time basis for when the indoor environment can be tested, and to reduce unnecessary re-inspections. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A schematic diagram of a device for testing the attenuation process of the concentration of volatile harmful substances in a coating provided by the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the interior of the simulation chamber;

[0017] Figure 3 for Figure 2 Schematic diagram of the sample rack and sample plate;

[0018] In the figure: 1-simulation chamber, 2-sample plate, 3-collector, 4-analyzer, 5-sample rack. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The purpose of the utility model is to provide a device for testing the attenuation process of the concentration of volatile harmful substances in coatings, so as to solve the problems existing in the above-mentioned prior art and to achieve a preliminary estimation of the pollutant situation at an indoor decoration site.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] like Figure 1-3 As shown, the utility model provides a device for testing the concentration attenuation process of volatile harmful substances in paint, including a simulation cabin 1, a sample plate 2, a collector 3 and an analyzer 4. The simulation cabin 1 is used to simulate the indoor environment. The sample plate 2 is placed in the simulation cabin 1. The sample plate 2 is coated with the tested paint. The collector 3 is connected to the interior of the simulation cabin 1. The collector 3 can collect the gas in the simulation cabin 1. The analyzer 4 is connected to the collector 3. The analyzer 4 can analyze the concentration of organic volatile substances in the gas collected by the collector 3.

[0023] The utility model provides a device for testing the attenuation process of the concentration of volatile harmful substances in coatings. A simulation cabin 1 is set to simulate an indoor environment, specifically simulate an indoor decoration environment. The tested coating is coated on a sample plate 2, and the sample plate 2 is placed in the simulation cabin 1. A collector 3 is used to collect the gas in the simulation cabin 1. An analyzer 4 is used to analyze the gas collected by the collector 3. The same batch of coatings as those at the construction site are used as samples to perform a sample test under the same conditions. After sampling, the result data of the samples under the same conditions are analyzed to obtain data related to the concentration of volatile harmful substances, and the trend thereof is studied by drawing a graph to judge the attenuation process of the concentration of volatile harmful substances in the coating and the volatile harmful substances in the coating. The time when the substance concentration reaches a safe concentration, based on the determination of this time, a preliminary estimate of the on-site pollutant situation is made, and a reference time basis is formed for when the indoor environment can be tested, thereby reducing unnecessary re-inspections; it should be noted here that the collector 3 and the analyzer 4 can both use equipment in the prior art, for example, the collector 3 can be but not limited to using an air pump, and the analyzer 4 can be but not limited to using a volatile organic gas analyzer, and the simulation of the indoor decoration environment in the simulation cabin 1 can be achieved through existing conventional means, and can be combined with actual simulation needs. After testing and debugging, indicators such as air flow, temperature and humidity in the simulation cabin 1 can be determined.

[0024] Furthermore, the device for testing the attenuation process of the concentration of volatile harmful substances in paint provided by the utility model also includes a sample rack 5, which is placed in the simulation cabin 1. The sample rack 5 is used to carry the sample plate 2. The sample plate 2 is supported by the sample rack 5 to increase the contact area between the paint on the sample plate 2 and the air.

[0025] As a more preferred implementation of this embodiment, the tested coating is coated on both surfaces of the sample plate 2 to improve the utilization rate of the sample plate 2 .

[0026] As a more preferred implementation of this embodiment, there are two sample plates 2, and the two sample plates 2 are placed in parallel to facilitate coating with sufficient coating.

[0027] As a more preferred implementation of this embodiment, the sample plate 2 is placed at an angle, so that the sample plate 2 can be stuck in the sample rack 5 by its own gravity.

[0028] As a more preferred implementation of this embodiment, the sample plate 2 is a ceramic tile, preferably a ceramic tile from the same batch as the ceramic tiles used for interior decoration. In this embodiment, two 500mm×500mm ceramic tiles or other metal plates without organic pollutants are found, and both sides are required to be flat. The paint used on site is applied with a roller brush or other tools used on the construction site. Both sides of the sample plate 2 must be coated, and the coating process is consistent with that on the construction site. After the coating is completed, it is slightly dried and placed in the simulation cabin 1, and placed on the sample rack 5 at an angle. The two sample plates 2 are required to be placed in parallel, and the placed sample plates 2 are placed together with the sample rack 5 in the simulation cabin 1 for testing. Sampling and analysis should be carried out every 24 hours, and the analysis items are the concentrations of organic volatile substances such as formaldehyde, benzene series and TVOC.

[0029] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A device for testing the concentration attenuation process of volatile harmful substances in coatings, characterized in that: It includes a simulation cabin, a sample plate, a collector and an analyzer. The simulation cabin is used to simulate the indoor environment. The sample plate is placed in the simulation cabin. The sample plate is coated with the tested paint. The collector is connected to the interior of the simulation cabin and can collect gas in the simulation cabin. The analyzer is connected to the collector and can analyze the concentration of volatile organic substances in the gas collected by the collector.

2. The device for testing the attenuation process of the concentration of volatile harmful substances in coatings according to claim 1, characterized in that: It also includes a sample rack, which is placed in the simulation chamber and is used to carry the sample plate.

3. The device for testing the attenuation process of the concentration of volatile harmful substances in coatings according to claim 2, characterized in that: The tested coating was coated on both surfaces of the sample plate.

4. The device for testing the attenuation process of the concentration of volatile harmful substances in coatings according to claim 2, characterized in that: The number of the sample plates is two, and the two sample plates are placed in parallel.

5. The device for testing the attenuation process of the concentration of volatile harmful substances in coatings according to claim 4, characterized in that: The sample plate is placed at an angle.

6. The device for testing the concentration attenuation process of volatile harmful substances in coatings according to claim 1, characterized in that: The sample plate is a ceramic tile.

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