A filtered fluidic aerosol sampling device

Abstract

The present application relates to aerosol monitoring technical field, disclose a kind of filtering formula jet flow aerosol sampling device, including support bracket, front baffle, gas guide hole, gas stop valve, three-stage filter paper holder, high-pressure flowmeter, air hole and interlayer gasket.The present application utilizes shock wave to carry aerosol to reach sampler and deposit on filter device, and the gas stop valve sensitive to pressure is used to realize the cut-off and opening of gas circuit, and the sampling volume is measured using high-pressure flowmeter;The device has strong resistance to high temperature and high pressure, and the components are sequentially connected and placed on the sampler bracket to complete the jet sampling work.The device is simple and convenient to operate, with high reliability, can be used in high temperature and high pressure chemical explosion scene and dynamics loading or other air jet scene to sample various aerosol particles, and the sample recovery is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aerosol monitoring, in particular to a filtering type jet flow aerosol sampling device. BACKGROUND

[0002] The existing aerosol sampler mainly includes active sampler and passive sampler. The active sampler contains total dust sampler and grading sampler, etc. The internal structure mainly includes large flow air pump, flow meter, divider, etc. The electronic devices and mechanical structure of the instrument are difficult to survive in the extreme environment close to the explosion center, and the sampling process needs to be actively started. The instrument has slow response to shock wave and high cost.

[0003] In view of the above-mentioned shortcomings of the existing aerosol sampling device, the present application develops a jet flow aerosol direct filtering sampling device with simple structure, reliable electronic devices and fast response speed. SUMMARY

[0004] In order to overcome the above-mentioned defects in the prior art, the present application provides a filtering type jet flow aerosol sampling device. The shock wave carries the aerosol to the sampler and deposits on the filter device. The pressure sensitive gas stop valve is used to realize the stop and opening of the gas circuit, and the high pressure flow meter is used to complete the measurement of the sampling volume. The device has strong resistance to high temperature and high pressure. The components are sequentially connected and placed on the sampler support to complete the jet sampling work. The device is simple and convenient to operate, has high reliability, can be used in high temperature and high pressure explosion scene, dynamic loading or other air jet scene to sample various aerosol particles, and the sample recovery is convenient.

[0005] The above technical purpose of the present application is realized by the following technical scheme: a filtering type jet flow aerosol sampling device, comprising a support support, one side of the support support is provided with a front baffle, the front baffle is vertically arranged, and the front baffle is fixedly connected with the support support; the front baffle is provided with a gas guide hole penetrating through the thickness direction of the front baffle, the top of the support support is provided with a gas stop valve, a three-stage filter paper holder and a high pressure flow meter; the gas stop valve is fixedly connected with the front baffle, and the gas stop valve is in communication with the gas guide hole; each stage of the three-stage filter paper holder is a three-stage ladder structure, and a ventilation hole is arranged in the central staggered hole position of each stage of the three-stage filter paper holder; each stage of the three-stage filter paper holder is provided with a clamping layer gasket, the clamping layer gasket is provided with a ventilation hole two, the ventilation hole one is matched with the ventilation hole two; the first stage of the three-stage filter paper holder is fixedly connected with the gas stop valve, and the third stage of the three-stage filter paper holder is fixedly connected with the high pressure flow meter.

[0006] Further, each two levels of the three-stage filter paper holder are connected by bolts.

[0007] Further, the third level of the three-stage filter paper holder is welded between the high-pressure flow meter.

[0008] Further, the top of the support bracket is provided with two lifting lugs one, and the top of the front baffle is provided with two lifting lugs two.

[0009] Further, the gas shut-off valve, the three-stage filter paper holder and the support bracket are made of high-temperature and high-pressure resistant materials.

[0010] In summary, the present application has the following advantages: the present application uses shock waves to carry aerosols to the sampler and deposit them on the filter device, and realizes the closing and opening of the gas circuit through the pressure-sensitive gas shut-off valve, and uses the high-pressure flow meter to complete the measurement of the sampling volume; the device has strong resistance to high temperature and high pressure, and the components are sequentially connected and placed on the sampler bracket to complete the jet sampling work. The device is simple and convenient to operate, has high reliability, can be used for jet sampling of various aerosol particles in high-temperature and high-pressure explosion scenes and dynamic loading or other air jet scenes, and the sample recovery is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a perspective view of a filtering jet aerosol sampling device in an embodiment of the present application;

[0012] Figure 2 is a front view of a filtering jet aerosol sampling device in an embodiment of the present application;

[0013] Figure 3 is a structure view of a front view of a three-stage filter paper holder in an embodiment of the present application;

[0014] Figure 4 is a left view of a three-stage filter paper holder in an embodiment of the present application;

[0015] Figure 5 is a structure view of a sandwich gasket in an embodiment of the present application;

[0016] Figure 6 is a schematic view of wall thickness and overpressure in an embodiment of the present application;

[0017] In the figure: 1, support bracket; 2, front baffle; 3, gas guide hole; 4, gas shut-off valve; 5, three-stage filter paper holder; 6, high-pressure flow meter; 7, air vent one; 8, sandwich gasket; 9, air vent two; 10, lifting lug one; 11, lifting lug two. DETAILED DESCRIPTION

[0018] The following will be described in combination with the accompanying Figures 1-6The present invention will be described in further detail below.

[0019] Example: A filter-type jet aerosol sampling device, such as Figures 1 to 5 As shown, the system includes a support bracket 1, which is arched. A front baffle 2 is fixedly installed on one side of the support bracket 1. The front baffle 2 is vertically arranged and fixedly connected to the support bracket 1. The front baffle 2 has air guide holes 3 that pass through the thickness direction of the front baffle 2. A gas shut-off valve 4, a three-stage filter paper holder 5, and a high-pressure flow meter 6 are installed on the top of the support bracket 1. The gas shut-off valve 4 is fixedly connected to the front baffle 2 and communicates with the air guide holes 3. Each of the three-stage filter paper holders 5... Each stage of the three-stage filter paper holder 5 has a three-stage stepped structure. Each stage of the three-stage filter paper holder 5 has a central staggered hole with a vent hole. Each stage of the three-stage filter paper holder 5 has an internal interlayer gasket 8. The filter paper is fixed inside the internal structure of each stage of the three-stage filter paper holder 5 by a fixing plate. The interlayer gasket 8 has a second vent hole 9. The first vent hole 7 is adapted to the second vent hole 9. The first stage of the three-stage filter paper holder 5 is fixedly connected to the gas shut-off valve 4, and the third stage of the three-stage filter paper holder 5 is fixedly connected to the high-pressure flow meter 6.

[0020] The three-stage filter paper holder 5 is connected to each other by bolts between every two stages, such as... Figure 3 As shown, the outer ring of holes are bolt holes; the third stage of the three-stage filter paper holder 5 is welded to the high-pressure flow meter 6; two lifting lugs 10 are fixedly installed on the top of the support bracket 1, and two lifting lugs 21 are fixedly installed on the top of the front baffle 2; the gas shut-off valve 4, the three-stage filter paper holder 5 and the support bracket 1 are all made of high-temperature and high-pressure resistant materials.

[0021] To ensure normal operation in chemical explosion scenarios, dynamic loading, or other high-pressure air jet scenarios, the front baffle 2, gas shut-off valve 4, three-stage filter paper holder 5, and high-pressure flow meter 6 require a reasonably designed container wall thickness to guarantee rigidity and sealing under high pressure. The sampler wall thickness should satisfy the internal pressure formula: where is the sampler design pressure, is the sampler wall thickness, represents the sampler inner diameter, is the allowable stress of the material, is the weld joint coefficient, and represents the corrosion allowance. Based on the allowable stress of the Q345 steel material, the relationship between wall thickness and overpressure is calculated for different application scenarios as follows: Figure 6 As shown.

[0022] Working principle: after the sampling device is installed, it is hung on the fixed position through the front baffle 2 and the lifting lug 1 and the lifting lug 2 10 and 11 installed on the support bracket 1, and is fixed to the ground by using bolts or ground nails, and the front baffle 2 is opposite to the jet flow. The jet flow and aerosol particles enter the gas stop valve 4 through the air guide hole 3 on the front baffle 2, the gas stop valve 4 has the function of positive flow conduction and reverse sealing, when the high-pressure jet flow passes through the gas stop valve 4 and reaches the first end surface of the three-stage filter paper holder 5 to generate reflected overpressure, the pressure difference on both sides of the gas stop valve 4 is reversed, at this time the valve is sealed and prevents gas backflow. After the jet flow gas passes through the three-stage filter paper holder 5, the aerosol particles carried therein are intercepted on the filter paper, and the jet flow gas enters the high-pressure flow meter 6. After the jet flow gas passes through the high-pressure flow meter 6, the gas flow is measured. After the jet flow passes, the three-stage filter paper holder 5 is disassembled, the filter paper is removed, and the aerosol particle sample is obtained.

[0023] The specific embodiments are only an explanation of the present application, and are not a limitation of the present application, and those skilled in the art can make modifications to the embodiments without creative contribution according to the needs after reading the specification, as long as the modifications are within the scope of the claims of the present application, and are protected by the patent law.

Claims

1. A filtered fluidic aerosol sampling device, comprising: The utility model provides a support support (1) one side is equipped with the front baffle (2) of support support (1), the front baffle (2) is vertically arranged, and the front baffle (2) is fixedly connected with support support (1);The front baffle (2) is equipped with the gas guide hole (3) of the thickness direction of passing through the front baffle (2), and the top of support support (1) is equipped with gas stop valve (4), three grade filter paper holder (5) and high pressure flowmeter (6);Gas stop valve (4) is fixedly connected with the front baffle (2), and gas stop valve (4) is communicated with the gas guide hole (3);Three grade filter paper holder (5) every level is three segment ladder type structure, and the central staggered hole of three grade filter paper holder (5) every level is provided with air hole one (7);Three grade filter paper holder (5) every level is equipped with interlayer gasket (8) inside, and interlayer gasket (8) is equipped with air hole two (9), and air hole one (7) is adapted with air hole two (9);The first level of three grade filter paper holder (5) is fixedly connected with gas stop valve (4), and the third level of three grade filter paper holder (5) is fixedly connected with high pressure flowmeter (6); The top of support support (1) is equipped with two lugs one (10), and the top of the front baffle (2) is equipped with two lugs two (11). Gas stop valve (4), three grade filter paper holder (5) and support support (1) all adopt high temperature resistant high pressure material, and gas stop valve (4) has the effect of gas flow positive direction conduction and reverse sealing.

2. The filter-type jet aerosol sampling device according to claim 1, wherein Every two levels of three grade filter paper holder (5) are connected through bolt.

3. The filter-type jet aerosol sampling device according to claim 1, wherein The third level of three grade filter paper holder (5) and high pressure flowmeter (6) are welded.

Images