An embedded smoke box

Abstract

This utility model provides an embedded smoke chamber, comprising: a chamber body, a top cover, side plate A, and side plate B; the chamber body has a viewing window; side plates A and B are respectively sealed and installed at the openings on two opposite sides of the chamber body; light-transmitting windows are installed on side plates A and B; the top cover can be freely opened and is sealed and installed on the top of the chamber body; the top cover is provided with a quick-feeding hole and a sampling hole (air outlet), and a variable frequency fan is installed on the lower surface; the chamber body is embedded in the sample chamber of an optical property detection and analysis instrument through a pin and hole positioning structure, and the light source of the instrument is optically coaxial with the two light-transmitting windows. This utility model has a simple structure, multiple functions, and strong adaptability. It can not only realize the recovery of reusable samples, but also reduce the damage of aerosol test samples to the testing instrument, and well meet the testing and analysis needs of optical properties and particle size characteristics of smoke aerosol particles, showing good application prospects in the field of optical detection technology.

Description

Technical Field

[0001] This utility model relates to the field of characteristic analysis and optical detection technology of smoke aerosol particles, specifically to a multifunctional smoke box that can be embedded in an optical detection and analysis instrument with a sample chamber. Background Technology

[0002] Aerosols are relatively stable dispersion systems formed by solid or liquid particles suspended in a gaseous medium. They are generally classified into smoke, fog, and dust, and can be naturally or artificially generated, widely existing in nature and accompanying people's daily lives and production activities. Smoke aerosols generally refer to solid particulate aerosols, widely used in fire protection, medicine, industrial and agricultural production, and national defense. Currently, the detection of the basic properties and optical characteristics of smoke aerosol particles mainly relies on various methods such as spectral analysis, particle size analysis, and electron microscopy. However, the samples prepared for testing are mostly in a solid or liquid sol state, which differs significantly from the actual state of smoke aerosols. This is mainly because the sample cells of the aforementioned detection instruments have small volumes and limited functions, failing to meet the real-time dynamic detection requirements of the optical characteristics of smoke aerosol samples. Utility Model Content

[0003] In view of this, the present invention provides an embedded smoke chamber with a coaxial sampling optical structure that can be embedded in the sample chamber of various optical property detection and analysis instruments. This smoke chamber features high-speed jet injection, frequency conversion stirring, and real-time concentration sampling. It has a practical and highly adaptable structure, and its volume can be flexibly designed according to the space of the sample chamber of the instrument it is paired with. It can be integrally embedded, making installation and operation simple. It can not only meet the real-time detection needs of smoke aerosol samples such as transmittance, absorbance, extinction characteristics, and particle size distribution, but also analyze and identify the composition and components of unknown smoke aerosol samples.

[0004] The technical solution of this utility model is: an embedded smoke box, comprising: a box body, a top cover, a side panel A, and a side panel B;

[0005] The enclosure is a rectangular frame structure with a hollow interior and rectangular openings on two opposite sides and the top; an organic glass window is sealed and installed at the rectangular opening on the front side of the enclosure.

[0006] Side panels A and B are respectively sealed and installed at rectangular openings on two opposite sides of the enclosure; light-transmitting windows of different materials such as infrared and quartz can be installed on side panels A and B according to testing requirements;

[0007] The top cover is sealed and installed on the top of the box, and a fan is installed on the lower surface of the top cover;

[0008] The top cover is provided with one inlet port and one sampling port (exhaust port); the inlet port can be connected to a high-speed powder jet device to realize high-speed jet injection and sample preparation in one go; the sampling port (exhaust port) can be connected to a sampler to sample the concentration of aerosol samples in real time; the inlet port and the sampling port (exhaust port) can also be connected to an inlet pipe and an outlet pipe respectively to perform dynamic testing and analysis of continuous aerosol samples;

[0009] The smoke box is embedded in the sample chamber of the optical property detection and analysis instrument, and the light source of the optical property detection and analysis instrument is optically coaxial with the two light-transmitting windows.

[0010] The bottom surface of the housing is provided with a fixing pin, which can be used with the fixing hole at the bottom of the sample chamber of the instrument to achieve the positioning of the housing.

[0011] In a preferred embodiment of this utility model, the top cover is unclamped and mounted on the top of the housing.

[0012] In a preferred embodiment of this utility model, both the inlet and the sampling hole are machined with internal threads and are connected to a high-speed powder jet device, a sampler, an air inlet pipe, and an air outlet pipe via quick-connect interfaces.

[0013] In a preferred embodiment of this utility model, side plate A and side plate B are respectively provided with coaxial circular holes, and light-transmitting window sheets of different materials such as infrared and quartz are installed at the circular holes by flange sealing.

[0014] In a preferred embodiment of this invention, the flange is detachably connected to the housing.

[0015] In a preferred embodiment of this utility model, the housing is made of corrosion-resistant metal.

[0016] In a preferred embodiment of this utility model, the housing is made of plexiglass.

[0017] In a preferred embodiment of this invention, the fan is a variable frequency fan.

[0018] Beneficial effects:

[0019] (1) The embedded smoke box of this utility model can be directly embedded in the sample chamber of various optical property detection and analysis instruments in an optical coaxial manner. It can not only meet the real-time detection needs of known smoke aerosol samples such as transmittance, absorbance, extinction characteristics, and particle size distribution, but also analyze and identify the composition and components of unknown smoke aerosol samples.

[0020] (2) The embedded smoke box of this utility model has a sample inlet and a sampling outlet (air outlet) on the top cover, both of which are machined with internal threads. It can be connected to a high-speed powder jet device, a sampler, an air inlet pipe, and an air outlet pipe through a quick interface. It can realize high-speed jet injection of powder samples in one step, sample preparation, and real-time sampling of aerosol sample concentration. It can also perform dynamic testing and analysis on existing continuous aerosol samples. In addition, a detachable variable frequency fan is installed on the lower surface of the top cover. The speed and air volume can be adjusted according to the testing requirements, which is beneficial to the effective dispersion of samples and the stability of aerosol state.

[0021] (3) The embedded smoke box of this utility model has a fixing pin on the bottom surface of the outer side of the box, which can be matched with the fixing hole at the bottom of the sample chamber of various optical characteristic detection and analysis instruments, thereby enabling the box to be connected to the instrument stably and quickly, and making the operation practical and convenient.

[0022] (4) The embedded smoke box of this utility model has a top cover installed on the top of the box that can be opened freely, which is convenient for maintenance and cleaning.

[0023] (5) The embedded smoke box of this utility model has a light-transmitting window fixed by a flange, which can be installed and disassembled by itself, making it convenient for the maintenance and replacement of the window. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the embedded smoke box of this utility model;

[0025] Figure 2 This is a schematic diagram of the embedded smoke box structure of this utility model.

[0026] Wherein: 1-box body, 2-top cover, 3-side plate A, 4-side plate B, 5-viewing window, 6-light transmission window, 7-flange, 8-sample inlet, 9-sampling hole. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0028] Example 1:

[0029] This embodiment provides a smoke box that can be embedded in a Fourier transform infrared spectrometer with a sample chamber. Through an optically coaxial structural design, it is embedded in the sample chamber of the instrument and can test and analyze the transmittance, absorbance, extinction characteristics, etc. of smoke aerosol samples. It can also analyze and identify the composition of unknown aerosol samples.

[0030] like Figure 1 As shown, the smoke box includes: box body 1, top cover 2, side panel A3 and side panel B4.

[0031] like Figure 2As shown, the housing 1 is a rectangular frame structure with a hollow interior and rectangular openings on two opposite sides and the top. The external dimensions of housing 1 are determined according to the dimensions of the sample chamber of the infrared spectrometer to be used; a certain space must be left between housing 1 and the inner wall of the sample chamber to facilitate the installation and removal of housing 1.

[0032] The enclosure 1 is made of metal or plexiglass and is washable. When the enclosure 1 is made of metal, a rectangular opening needs to be machined on the front face of the enclosure 1, and then plexiglass is sealed and installed at the rectangular opening as a viewing window 5. When the enclosure 1 is made entirely of plexiglass, there is no need to set a rectangular opening on the front face.

[0033] The four corners of the inner cavity of the chamber 1 are rounded to eliminate dead corners in the inner cavity, enhance the fluidity of the test sample, and facilitate the effective dispersion of the test sample.

[0034] Side panels A3 and B4 have identical structures, and each has a corresponding circular hole for sealing and installing the light-transmitting window 6 (such as an infrared ZnSe window). As an example, the diameter of the circular hole is 30mm. The light-transmitting window 6 is pressed into the circular hole of side panels A3 and B4 by flanges 7. Flanges 7 have a central through hole and are fixed to the corresponding side panels by screws around their perimeter, thus making the light-transmitting window 6 removable and easy to replace.

[0035] Side panels A3 and B4 are sealed and installed at the rectangular openings on two opposite sides of the housing 1, ensuring that the light-transmitting windows 6 mounted on side panels A3 and B4 are coaxial. The installation position of the light-transmitting windows 6 must ensure that, when the smoke box is embedded in the sample chamber of a Fourier transform infrared spectrometer, the infrared light source of the infrared spectrometer is optically coaxial with the two light-transmitting windows 6 (i.e., all three are coaxially arranged). As an example, a fixing pin is provided on the outer bottom surface of the housing 1, which matches the fixing hole at the bottom of the sample chamber of the Fourier transform infrared spectrometer, ensuring a stable connection between the smoke box housing 1 and the infrared spectrometer, and guaranteeing that the infrared light source of the infrared spectrometer is optically coaxial with the light-transmitting windows.

[0036] The top cover 2 is sealed at the rectangular opening at the top of the housing 1, thereby forming a sealed cavity inside the housing 1 through the top cover 2, side panel A3 and side panel B4 (and the viewing window 5). A variable frequency fan is detachably mounted on the lower surface of the top cover 2, and the wind speed can be adjusted according to the usage requirements; as an example, the fan can be a DC anti-resistance micro-dust magnetic levitation motor fan.

[0037] As an example, the top cover 2 is unclamped at a rectangular opening on the top of the box 1. One side of the top cover 2 is mounted on the box 1 via a hinge, and the other side is connected to the box 1 via a limiting pin, thereby facilitating the opening of the top cover 2 and making it convenient for adding materials and cleaning.

[0038] As an example, the top cover 2 is provided with a sample inlet 8 for connection to a high-speed powder jet device, which allows for sample injection via high-speed jetting, facilitating effective dispersion of the test sample. The top cover 2 is also provided with a sampling port 9 (which can also serve as an exhaust port), enabling real-time sampling of the concentration of aerosol samples. The sample inlet 8 and sampling port 9 on the top cover 2 can also be connected to an inlet pipe and an exhaust pipe, respectively, allowing for dynamic testing and analysis of continuous aerosol samples.

[0039] As an example, the above-mentioned sealing installation methods are all as follows: a sealing groove is provided at the rectangular opening on the corresponding end face of the housing 1, thereby sealing the installation by means of a sealing strip installed in the sealing groove.

[0040] Before testing this utility model, the smoke box is first assembled as described above. Then, the sample rack in the original infrared spectrometer's sample chamber is removed. Finally, the smoke box is integrally embedded into the sample chamber using the bottom fixing pins and holes. The specific operation process is as follows:

[0041] First, the Fourier transform infrared spectrometer is powered on and preheated. During this time, the test system is connected, and the appropriate test mode is selected according to the test requirements, with settings such as test band and number of scans completed. After preheating, the background data of the blank smoke box is quickly scanned and collected using the spectrometer, and the background data is stored. Next, a certain mass of test sample is weighed and placed in the storage bin of the small powder high-speed jet device. The test sample is then sprayed into the smoke box through the injection port 8. At the same time, the fan is turned on and the fan speed is adjusted to quickly and effectively disperse the sample in the smoke box, forming an aerosol. After the aerosol stabilizes for 20 seconds, the real-time concentration of the smoke is tested using a small sampling device connected to the sampling port 9. Simultaneously, the characteristic spectra such as transmittance and absorbance of the test sample are obtained by rapid scanning using the spectrometer. For the testing and analysis of existing continuous aerosol samples, the inlet port 8 and sampling port 9 are connected to the sample's inlet and outlet pipes respectively via a quick interface. The flow rate is adjusted through the inlet pipe valve. After the aerosol sample stabilizes, its characteristic spectrum can be tested. The obtained characteristic spectrum can be processed to obtain the corresponding transmittance, absorbance, and other data of the aerosol sample. The optical properties of the smoke aerosol sample, such as scattering, absorption, and extinction, can be analyzed. Furthermore, the composition of unknown samples can be analyzed and identified based on their characteristic spectra. After the test, the smoke box is removed as a whole. Reusable samples are then recovered, and the box is disassembled, cleaned, and maintained.

[0042] Example 2:

[0043] Based on the above embodiment 1, this embodiment provides a smoke box that can be embedded in a dry laser particle size analyzer with a sample chamber. It is embedded in the sample chamber of the instrument through an optical coaxial structural design, which can realize the testing of particle size distribution characteristics of smoke aerosol samples.

[0044] The assembly of the embedded smoke box in this embodiment is the same as in Embodiment 1. Only the light-transmitting window 6 needs to be replaced with a quartz window. After assembly, the smoke box is integrally embedded into the sample chamber of the laser particle size analyzer using the bottom fixing pins and holes. The specific operation process is as follows:

[0045] First, preheat the dry laser particle size analyzer and set the test mode and parameters. Next, weigh a certain amount of test sample and add it to the storage bin of the small high-speed powder jet device. After sealing the sampling hole 9 with a sealing plug, spray the test sample into the smoke chamber through the sample inlet 8. At the same time, turn on the fan and adjust the fan speed to quickly disperse the sample in the smoke chamber. After a stable aerosol is formed, conduct the test.

[0046] For the testing and analysis of existing continuous aerosol samples, the inlet port 8 and the sampling port 9 are connected to the sample's inlet and outlet pipes respectively via a quick interface. The flow rate is adjusted by the inlet pipe valve, and the test is performed after the aerosol sample has stabilized.

[0047] This smoke chamber is embedded in the sample chamber of various optical property testing and analysis instruments. It can be used with infrared spectrometers, dry laser particle size analyzers, and other instruments. Without affecting the original testing functions of the instruments, it not only enables the recovery of reusable samples but also reduces the corrosion and damage to the instruments caused by aerosol samples. With its simple structure, multiple functions, and strong adaptability, this smoke chamber effectively meets the testing and analysis needs for the optical properties and particle size characteristics of known or unknown dynamic smoke aerosol particles, demonstrating promising application prospects in the field of optical detection technology.

[0048] Although the present invention has been described in detail above through general description and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An embedded smoke box, characterized in that: include: Box body (1), top cover (2), side panel A (3) and side panel B (4); The box (1) is a rectangular frame structure with a hollow interior and rectangular openings on two opposite sides and the top; an organic glass is sealed and installed at the rectangular opening on the front side of the box (1) as a viewing window (5). The side panels A (3) and B (4) are respectively sealed and installed at the rectangular openings on the two opposite sides of the box body (1); light-transmitting windows (6) are installed on the side panels A (3) and B (4). The top cover (2) is sealed and installed on the top of the box (1), and a fan is installed on the lower surface of the top cover (2); The top cover (2) is provided with an inlet (8) for connecting to a high-speed powder jet device and a sampling hole (9) for real-time sampling of aerosol concentration. The smoke box is embedded in the sample chamber of the optical property detection and analysis instrument, and the light source of the optical property detection and analysis instrument is optically coaxial with the two light-transmitting windows (6). The bottom surface of the box (1) is provided with a fixing pin, which cooperates with the fixing hole at the bottom of the sample chamber to realize the positioning of the box (1).

2. The embedded smoke box as described in claim 1, characterized in that: The top cover (2) is openable and installed on the top of the box (1).

3. The embedded smoke box as described in claim 1 or 2, characterized in that: Both the injection port and the sampling port are machined with internal threads.

4. The embedded smoke box as described in claim 1 or 2, characterized in that: The side plate A (3) and side plate B (4) are respectively provided with coaxial circular holes, and the light-transmitting window (6) is installed at the circular holes by a flange (7).

5. The embedded smoke box as described in claim 4, characterized in that: The flange (7) is detachably connected to the housing (1).

6. The embedded smoke box as described in claim 1 or 2, characterized in that: The enclosure (1) is made of corrosion-resistant metal.

7. The embedded smoke box as described in claim 1 or 2, characterized in that: The box (1) is made of plexiglass.

8. The embedded smoke box as described in claim 1 or 2, characterized in that: The fan is a variable frequency fan.

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