CN111426527A

CN111426527A - High-time-resolution atmospheric particulate sampler

Info

Publication number: CN111426527A
Application number: CN202010438232.0A
Authority: CN
Inventors: 张雅萍; 王笑非
Original assignee: Suzhou Zhiai Environmental Technology Co ltd
Current assignee: Suzhou Zhiai Environmental Technology Co ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-07-17

Abstract

The application discloses high time resolution ratio atmospheric particulates sample thief, including intake pipe, filter membrane module, the pump evacuation pipe of sealing connection setting in proper order, the filter membrane module evenly is provided with a plurality ofly along carousel circumferencial direction, carousel axle center department is provided with its pivoted step motor of drive, step motor drives every fixed time the carousel rotates, and makes next filter membrane module both ends respectively sealing connection in the intake pipe with the pump evacuation pipe. The invention realizes full-automatic continuous collection of air samples, can capture the time variation trend of pollution sources or atmospheric oxidation processes, and is more beneficial to accurately controlling haze or meeting the requirements of scientific research.

Description

High-time-resolution atmospheric particulate sampler

Technical Field

The application relates to an atmospheric particulates sample thief, in particular to a high time resolution atmospheric particulates sample thief.

Background

The mass concentration and chemical composition of atmospheric particulates are very important factors affecting human health, climate change, and visibility. A series of scientific researches prove that the mass concentration and chemical component analysis of the particulate matters provide very important insight for atmospheric aerosol chemistry, cloud condensation nucleus process and public health influence. Particulate matter mass concentration and characterization of particulate matter components can be achieved by taking atmospheric particulate filter membrane samples using a sampler and selecting appropriate chemical analysis techniques (IC, ICP-MS, EC/OC, GC-MS, XRF, etc.). The atmospheric particulate sampler can be divided into the following parts according to the principle: a filter sampler, and an impact sampler. The filtration sampler is a unit which sucks a certain amount of air into a filter membrane (made of polytetrafluoroethylene or quartz) through a vacuum pump, the air passes through the surface of the filter membrane, and atmospheric particles are trapped on the surface of the filter membrane. An impact sampler refers to a device in which an air stream ejects particles through an orifice nozzle onto a collection surface to collect atmospheric particles, the size range of the collected particles being controlled by the size of the orifice and the distance of the nozzle from the collection surface.

The pores of the impact sampler are very small and easily clog, so it is often necessary to clean the pores. And the filter membrane sampler has the characteristics of durability, low maintenance and the like. However, a sample is generally obtained by the traditional filter membrane sampler within 24 hours in 1 day, and the time resolution of the sample is low, so that the time change trend of a pollution source or an atmospheric oxidation process cannot be captured, and the haze cannot be accurately controlled.

Disclosure of Invention

The invention aims to develop a full-automatic high-time-resolution atmospheric particulate sampler which can collect an atmospheric sample on line in real time. While a conventional sampler takes one sample 1 day, such a high time resolution sampler can set a sample for 1 hour. The time resolution of the sample is greatly improved. Through subsequent detection and analysis, the method can capture the time change trend of a pollution source or an atmospheric oxidation process, and is more favorable for accurately controlling haze or meeting the requirements of scientific research.

In order to achieve the above object, the present invention provides the following technical solutions.

The embodiment of the application discloses high time resolution ratio atmospheric particulates sample thief, including intake pipe, filter membrane module, the pump evacuation pipe of sealing connection setting in proper order, the filter membrane module evenly is provided with a plurality ofly along carousel circumferencial direction, carousel axle center department is provided with its pivoted step motor of drive, step motor drives every fixed time the carousel rotates to make next filter membrane module both ends respectively sealing connection in the intake pipe with the pump evacuation pipe.

Preferably, in the above high time resolution atmospheric particulates sampler, 24 filter membrane modules are arranged on the turntable, and the stepper motor drives the turntable to rotate 15 ° every 1 h.

Preferably, in the above high time resolution atmospheric particulates sampler, a branch is installed on one side of the pump evacuation pipe through a three-way solenoid valve.

Preferably, in the above-mentioned high time resolution atmospheric particulates sampler, further include a clamping mechanism, including a first supporting rod and a second supporting rod respectively fixedly mounted to the air inlet pipe and the pump evacuation pipe, the clamping mechanism drives the air inlet pipe and the pump evacuation pipe to abut against or be away from the filter membrane module respectively.

Preferably, in the above high time resolution atmospheric particulates sampler, the clamping mechanism comprises a clamping motor and a shaft body driven by the clamping motor, the shaft body is connected with two opposite sliding blocks through threads,

the two symmetrical first supporting rods are arranged, and two ends of each first supporting rod are respectively connected to the sliding block and the air inlet pipe in a rotating mode;

the second branch is provided with two symmetries, second branch both ends rotate respectively connect in the slider and pump evacuation pipe.

Preferably, in the above high time resolution atmospheric particulate sampler, the internal threads of the two sliders are opposite in direction.

Preferably, in the above-mentioned high time resolution atmospheric particulates sampler, the air inlet pipe and the pump evacuation pipe are respectively formed with a compact block attached to the turntable at one end connected to the filter membrane module.

Compared with the prior art, the sampler has the advantages that the designed sampler has the following advantages: compared with an impact sampler, the filter membrane sampler is easier to operate and maintain; compared with the traditional filter membrane sampler, the time resolution of the sample is improved to 1 hour by one sample, which is improved by 24 times; the invention realizes full-automatic continuous collection of air samples, can capture the time variation trend of pollution sources or atmospheric oxidation processes, and is more beneficial to accurately controlling haze or meeting the requirements of scientific research.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of a high temporal resolution atmospheric particulate sampler in an embodiment of the invention;

fig. 2 is a schematic diagram of a turntable according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-2, the high-time-resolution atmospheric particulate sampler 100 includes an air inlet pipe 101, a plurality of filter membrane modules 102, and a pump evacuation pipe 103, which are sequentially and hermetically connected, wherein the filter membrane modules 102 are uniformly arranged along the circumferential direction of a turntable 104, a stepping motor 105 is arranged at the axis of the turntable 104 to drive the turntable 104 to rotate, and the stepping motor 105 drives the turntable 104 to rotate at regular intervals, so that two ends of the next filter membrane module 102 are respectively and hermetically connected to the air inlet pipe 101 and the pump evacuation pipe 103. 24 filter membrane modules 102 are arranged on the rotary table 104, and the stepping motor 105 drives the rotary table 104 to rotate 15 degrees every 1 h. A branch 107 is provided on one side of the pump evacuation line 103 via a three-way solenoid valve 106.

Among this technical scheme, the air passes through the vacuum pump and bleeds and gets into the intake pipe, passes through the filter membrane module afterwards, and atmospheric aerosol is held back and is collected on the filter membrane. 24 filter membrane modules are pre-loaded on a turntable, the turntable is controlled by a stepping motor to rotate 15 degrees per hour, the rotation is carried out for one circle in 1 day and 24 hours, and before a clamping mechanism loosens the modules, a three-way electromagnetic valve switches an air inlet pipe to a branch, so that the vacuum pump is ensured to be stopped.

Further, the device further comprises a clamping mechanism 200, which comprises a first supporting rod 201 and a second supporting rod 202 fixedly mounted on the air inlet pipe 101 and the pump evacuation pipe 103, respectively, and the clamping mechanism 200 drives the air inlet pipe 101 and the pump evacuation pipe 103 to abut against or be away from the filter membrane module 102, respectively. The clamping mechanism 200 comprises a clamping motor 203 and a shaft body 204 driven by the clamping motor 203, two oppositely arranged slide blocks 205 are connected on the shaft body 204 through threads,

two symmetrical first supporting rods 201 are arranged, and two ends of each first supporting rod 201 are respectively connected to the sliding block 205 and the air inlet pipe 101 in a rotating mode;

two symmetrical second support rods 202 are arranged, and two ends of the second support rods 202 are respectively connected to the sliding block 205 and the pump evacuation pipe 103 in a rotating manner.

The internal threads of the two sliders 205 are opposite in direction.

In the technical scheme, a clamping motor controls a clamping mechanism to loosen and clamp a filter membrane module, the clamping mechanism loosens the current filter membrane module, a turntable rotates for 15 degrees to align to the next module, then the clamping mechanism clamps the module, the internal threads of two sliding blocks are opposite, and the opposite movement directions are ensured, namely, the clamping mechanism is kept to simultaneously loosen or simultaneously clamp. The other clamping mechanism is positioned on one side of the turntable and can be positioned above the turntable, so that the clamping mechanism and the turntable are prevented from interfering with each other.

Furthermore, a compressing block 108 attached to the turntable 104 is formed at one end of the connection filter membrane module 102 of the air inlet pipe 101 and the pump evacuation pipe 103, respectively.

In this technical scheme, the sealing connection is ensured.

The technical scheme realizes automation, and the sample feeding gas circuit and the branch gas circuit are controlled by a three-way solenoid valve; the stepping motor controls the rotation of the turntable; the clamping motor controls the clamping mechanism to loosen and clamp the filter membrane; the computer program controls the three-way electromagnetic valve, the stepping motor and the motor to work cooperatively.

The technical scheme realizes high time resolution samples: according to the invention, 24 filter membrane modules are preloaded on the rotary table, and the rotary table controls the rotation of the switching filter membrane modules through the stepping motor, so that the sampling of the sample with the time resolution of 1 hour is realized.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.

Claims

1. The utility model provides a high time resolution ratio atmospheric particulates sample thief, its characterized in that, is including intake pipe, filter membrane module, the pump evacuation pipe of sealing connection setting in proper order, the filter membrane module evenly is provided with a plurality ofly along carousel circumferencial direction, carousel axle center department is provided with its pivoted step motor of drive, step motor drives at every fixed time the carousel rotates to make next filter membrane module both ends respectively sealing connection in the intake pipe with the pump evacuation pipe.

2. The high temporal resolution atmospheric particulate sampler of claim 1, wherein the turntable is provided with 24 filter membrane modules, and the stepper motor drives the turntable to rotate 15 ° every 1 h.

3. The high time resolution atmospheric particulate sampler of claim 1, wherein a branch is installed on one side of the pump evacuation pipe through a three-way solenoid valve.

4. The high temporal resolution atmospheric particulates sampler of claim 1, further comprising a clamping mechanism including a first strut and a second strut fixedly mounted to the intake tube and the pump evacuation tube, respectively, the clamping mechanism driving the intake tube and the pump evacuation tube to abut against or be away from the filter membrane module, respectively.

5. The high temporal resolution atmospheric particulate sampler of claim 4, wherein the clamping mechanism comprises a clamping motor and a shaft body driven by the clamping motor, the shaft body is connected with two oppositely arranged sliding blocks through threads,

6. The high temporal resolution atmospheric particulate sampler of claim 5, wherein the internal threads of the two slides are oppositely threaded.

7. The high temporal resolution atmospheric particulates sampler of claim 1, wherein the air inlet pipe and the pump evacuation pipe are respectively formed with a compact block attached to the turntable at one end connected to the filter membrane module.