CN217717121U - Particulate matter trapping device - Google Patents
Particulate matter trapping device Download PDFInfo
- Publication number
- CN217717121U CN217717121U CN202123140002.5U CN202123140002U CN217717121U CN 217717121 U CN217717121 U CN 217717121U CN 202123140002 U CN202123140002 U CN 202123140002U CN 217717121 U CN217717121 U CN 217717121U
- Authority
- CN
- China
- Prior art keywords
- controller
- sample
- filter membrane
- particulate matter
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to a particulate matter trapping device, which relates to the technical field of automatic control and comprises a flow detection component, a selection valve, a trapping component and a controller; the flow detection component, the selection valve and the trapping component are communicated in sequence through pipelines; the flow detection component and the selection valve are electrically connected with the controller; the flow detection component is used for detecting the current flow information of the sample in the pipeline and sending the current flow information to the controller; the controller is used for sending an on-off instruction according to the current flow information and the preset flow information; the selection valve is used for controlling the circulation of the sample in the pipeline according to the on-off instruction; the trapping part is used for trapping particulate matters in the sample. The utility model discloses can the automatic adjustment sample flow, improve and detect the precision.
Description
Technical Field
The utility model relates to an automatic control technical field especially relates to a particulate matter entrapment device.
Background
With the increasing environmental pollution, the amount of inhalable particles in the atmosphere is increasing. The inhalable particles have aerosol properties, and easily enter the human lung along with respiration, so that the inhalable particles are accumulated in the human respiratory tract or alveolus, can enter blood circulation and are extremely harmful to the human body. Therefore, a particle trap is needed to detect inhalable particles in the environment.
However, the particle trap of the prior art needs to be manually controlled to start and stop trapping particles during use, and also needs to be manually adjusted in the air intake flow rate of the particle trap. Due to the inaccuracy of the manual operation, the accuracy of the final calculation result may be affected.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a particulate matter entrapment device can the automatic adjustment sample flow, improves and detects the precision.
In order to achieve the above purpose, the utility model provides a following scheme:
a particulate matter trapping device includes a flow rate detecting means, a selector valve, a trapping means, and a controller;
the flow detection component, the selector valve and the trapping component are communicated in sequence through pipelines; the flow detection component and the selection valve are both electrically connected with the controller;
the flow detection component is used for detecting the current flow information of the sample in the pipeline and sending the current flow information to the controller;
the controller is used for sending a switching instruction according to the current flow information and preset flow information;
the selector valve is used for controlling the circulation of the sample in the pipeline according to the on-off command;
the trapping part is used for trapping particulate matters in the sample.
Optionally, the trapping means comprises a filter membrane, a filter membrane clamp and a metal mesh;
the filter membrane is arranged on the filter membrane clamp and is matched with the filter membrane clamp for use;
the metal net is arranged at the joint of the filter membrane and the filter membrane clamp.
Optionally, the particulate matter trapping device further comprises an interactive screen;
the interactive screen is connected with the controller, and the interactive screen is used for:
inputting a first weight and a second weight to the controller; the first weight is the weight of the filter membrane before trapping the sample; the second weight is the weight of the filter membrane after capturing the sample;
the controller is further configured to determine a unit content of particulate matter in the sample based on the first weight, the second weight, and the current flow information;
the interactive screen is further used for displaying the current flow information, the preset flow information, the first weight, the second weight and the unit content of the particulate matters in the sample.
Optionally, the particulate matter trapping device further comprises a gas inlet and a gas outlet;
the air inlet is communicated with the flow detection component through a pipeline;
the air outlet is communicated with the trapping component through a pipeline.
Optionally, the selector valve is also in communication with the air outlet via a conduit.
Optionally, the selector valve is a three-way selector valve.
Optionally, the particulate matter trapping device further includes a pressure maintaining valve;
the pressure stabilizing valve is arranged between the air inlet and the flow detection component.
Optionally, the flow detection component is a mass flow meter.
Optionally, the particulate matter trapping device further includes a power source;
the power supply is respectively connected with the controller and the flow detection component, and the power supply is used for supplying power to the controller and the flow detection component.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
the flow detection component is used for detecting the current flow information of the sample in the pipeline, the controller is used for sending an on-off instruction to the selector valve according to the current flow information and the preset flow information, and the on-off instruction is used for controlling the on-off of the selector valve, so that the flow of the sample in the pipeline is automatically controlled, and the detection precision is improved. Meanwhile, the trapping part traps the particulate matters in the sample, when the selection valve is closed under the control of the on-off instruction, no sample enters the trapping part through the selection valve, so that the trapping part is automatically closed, and the automatic collection of the sample is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic structural view of a particulate trapping device according to the present invention;
fig. 2 is a diagram of the solid device of the particulate trapping device of the present invention.
Description of the symbols:
the device comprises a gas inlet 1, a mass flow meter 2, a three-way selector valve 3, a trapping part 4, a gas outlet 5, a first pipeline 6, a second pipeline 7, an interaction screen 8, a pressure stabilizing valve 9 and a power supply interface 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
The utility model aims at providing a particulate matter entrapment device can realize the automatic acquisition sample, and sample flow can automatic control, and easy operation is convenient, and the ration is accurate.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the present invention provides a particulate matter trapping device including a flow rate detecting part, a selector valve, a trapping part 4, and a controller. Wherein the flow rate detection means, the selector valve, and the trapping means 4 are sequentially communicated through a pipe; the flow detection component and the selection valve are electrically connected with the controller; the flow detection component is used for detecting current flow information of the sample in the pipeline and sending the current flow information to the controller. Specifically, the flow rate detection means is a mass flow meter 2.
And the controller is used for sending an on-off instruction according to the current flow information and the preset flow information. The selector valve is used for controlling the circulation of the sample in the pipeline according to the on-off command; the trapping member 4 is used for trapping particulate matter in the sample.
Preferably, the controller is a comparator, the current flow information is a current flow value, and the preset flow information is a preset flow value. The comparator is configured to: when the current flow value is smaller than the preset flow value, outputting a high level to open the selector valve and allow the sample to pass; and when the current flow value is equal to or greater than the preset flow value, outputting a low level, so that the selection valve is closed and the sample cannot pass through.
Further, the particulate matter trapping device further includes an air inlet 1 and an air outlet 5; the air inlet 1 is communicated with the flow detection component through a pipeline; the air outlet 5 is communicated with the trapping part through a pipeline. The selector valve is also communicated with the air outlet 5 through a pipeline. Specifically, the selector valve is a three-way selector valve 3; the output end of the flow detection component is communicated with the first input end of the three-way selector valve 3 through a pipeline, the first output end of the three-way selector valve 3 is communicated with the air outlet 5 through a first pipeline 6, and the second output end of the three-way selector valve 3 is communicated with the trapping component 4 through a second pipeline 7.
In the embodiment of the present invention, the trapping part 4 comprises a filter membrane, a filter membrane clamp and a metal mesh; the filter membrane is arranged on the filter membrane clamp and is matched with the filter membrane clamp for use; the metal net is arranged at the joint of the filter membrane and the filter membrane clamp and used for fixing the aluminum membrane in the filter membrane clamp. The trapping component also comprises a sealing ring which is arranged between the metal net and one clamping plate of the filter membrane clamp and is used for preventing the sample from leaking.
The particulate matter trapping device further includes an interactive screen 8. The interactive screen 8 is connected with the controller, and the interactive screen 8 is used for: inputting a first weight and a second weight to the controller; the first weight is the weight of the filter membrane before trapping the sample; the second weight is the weight of the filter membrane after capturing the sample; the controller is further configured to determine a unit content of particulate matter in the sample based on the first weight, the second weight, and the current flow information.
In particular, by formula
Calculating the unit content of particulate matter in the sample, wherein X1Expressed as unit content of particulate matter in milligrams per cubic meter (mg/m)3)；m1Represents a first weight in milligrams (mg); m is a unit of2Represents a second weight in milligrams (mg); v represents current flow information, specifically the sample volume in cubic meters (m) of the sample at 20 ℃ and 101.3kPa pressure3)。
The interactive screen is further used for displaying the current flow information, the preset flow information, the first weight, the second weight and the unit content of the particulate matters in the sample.
Specifically, the particulate matter trapping device further includes a pressure maintaining valve 9 and a power source. The pressure maintaining valve 9 is arranged between the air inlet 1 and the flow rate detection part. The power supply is respectively connected with the controller and the flow detection component, and the power supply is used for supplying power to the controller and the flow detection component.
Fig. 2 is the utility model discloses particulate matter trapping device's entity device picture, wherein the working process of particulate matter trapping device specifically as follows:
1) And (3) placing a certain numbered filter membrane in a constant temperature and humidity box for balancing for 24 hours, taking any point in the temperature range of 15-30 ℃ as the balancing temperature, and recording the balancing temperature and the humidity. The filter membrane is weighed under the above equilibrium conditions and the first weight m is recorded1(mg)。
2) The head top cover of the particulate matter trapping device was opened, the filter membrane holder in the particulate matter trapping member 4 was taken out, and dust in the filter membrane holder was wiped off with a cleaning dry cloth.
3) The suede of the filter membrane is arranged in the filter membrane clamp towards the air inlet direction, then the metal net and the O-shaped sealing ring are installed, the filter membrane clamp is closed, aligned and screwed down, and air leakage is avoided. And setting the flow rate and the preset flow value of the sample on the interactive screen 8, and then clicking a start button on the interactive screen 8 to start sampling. In addition, an external power source can be provided for the particulate matter trapping device through the power interface 10.
4) A sample enters from the air inlet 1, and the flow of the sample is detected through the mass flow meter; the three-way selector valve 3 is firstly selected to be communicated with the first pipeline 6, and the gas path is purged for 5min; then the three-way selector valve 3 is selectively communicated with the second pipeline 7, so that the sample passes through the trapping part 4 to start trapping of the particulate matters in the sample.
5) And after the sample is collected, opening the filter membrane clamp, lightly taking down the filter membrane by using forceps, folding the filter membrane inwards by using the sampling surface, and putting the filter membrane into filter membrane bags with the same number. When the filter membrane is taken, if the filter membrane is damaged, or the outline of the edge of the dust on the filter membrane is not clear, and the filter membrane is installed askew (indicating air leakage), the sampling is abandoned, and the re-sampling is needed.
6) Weighing the sampled filter membrane to obtain a second weight m2(mg) inputting the obtained first weight and second weight into an interactive screen, and displaying the unit content of the particulate matter in the sample by the interactive screen.
The particulate matter trapping device of the utility model extracts gas with a certain volume at a constant speed, and suspended particulate matters with the particle diameter less than 100 mu m in the gas are trapped on the filter membrane; and calculating the concentration of the total suspended particulate matters according to the weight difference of the filter membranes before and after sampling and the sampling volume. And the filter membrane after sampling can be further used for the component analysis of particulate matters after being processed. The utility model provides a particulate matter entrapment device simple structure, convenient operation.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principle and the implementation of the present invention are explained by applying specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (8)
1. A particulate matter trapping device characterized by comprising a flow rate detecting means, a selector valve, a trapping means, and a controller;
the flow detection component, the selection valve and the trapping component are communicated in sequence through pipelines; the flow detection component and the selection valve are electrically connected with the controller;
the flow detection component is used for detecting the current flow information of the sample in the pipeline and sending the current flow information to the controller;
the controller is used for sending a switching instruction according to the current flow information and preset flow information;
the selector valve is used for controlling the circulation of the sample in the pipeline according to the on-off instruction;
the trapping part is used for trapping particulate matters in the sample; the trapping component comprises a filter membrane, a filter membrane clamp and a metal net;
the filter membrane is arranged on the filter membrane clamp and is matched with the filter membrane clamp for use;
the metal net is arranged at the joint of the filter membrane and the filter membrane clamp.
2. The particulate matter trapping device according to claim 1, further comprising an interactive screen;
the interactive screen is connected with the controller, and the interactive screen is used for:
inputting a first weight and a second weight to the controller; the first weight is the weight of the filter membrane before capturing the sample; the second weight is the weight of the filter membrane after capturing the sample;
the controller is further configured to determine a unit content of particulate matter in the sample based on the first weight, the second weight, and the current flow information;
the interactive screen is further used for displaying the current flow information, the preset flow information, the first weight, the second weight and the unit content of the particulate matters in the sample.
3. The particulate matter trapping device according to claim 1, further comprising a gas inlet and a gas outlet;
the air inlet is communicated with the flow detection component through a pipeline;
the air outlet is communicated with the trapping component through a pipeline.
4. The particulate matter trapping device according to claim 3, wherein the selector valve is further communicated with the gas outlet through a pipe.
5. The particulate matter trapping device according to claim 4, wherein the selector valve is a three-way selector valve.
6. The particulate matter trapping device according to claim 3, further comprising a pressure maintaining valve;
the pressure stabilizing valve is arranged between the air inlet and the flow detection component.
7. The particulate matter trapping apparatus according to claim 1, wherein the flow rate detecting member is a mass flow meter.
8. The particulate matter trapping device according to claim 1, further comprising a power source;
the power supply is respectively connected with the controller and the flow detection component, and the power supply is used for supplying power to the controller and the flow detection component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123140002.5U CN217717121U (en) | 2021-12-14 | 2021-12-14 | Particulate matter trapping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123140002.5U CN217717121U (en) | 2021-12-14 | 2021-12-14 | Particulate matter trapping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217717121U true CN217717121U (en) | 2022-11-01 |
Family
ID=83773562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123140002.5U Active CN217717121U (en) | 2021-12-14 | 2021-12-14 | Particulate matter trapping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217717121U (en) |
-
2021
- 2021-12-14 CN CN202123140002.5U patent/CN217717121U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103091134B (en) | Stationary source particle and volatile organic matter diluting and sampling system and the method for sampling | |
| CN105929443B (en) | Actively any method for adjusting precipitation rate of radon and Effective Decay Constant | |
| CN107917736B (en) | On-spot detecting system of civil stove flue gas pollutant emission | |
| CN106855472A (en) | A kind of stationary source particulate Hg and gaseous mercury isokinetic sampling device and the method for sampling | |
| JP2004511769A5 (en) | ||
| CN201935838U (en) | Aerosol sampling device applicable to high-temperature, high-pressure and high-humidity pipeline environment | |
| CN206974761U (en) | The sampling apparatus of burning and exhausting source VOCs measure | |
| CN110068428A (en) | A kind of iodine adsorber slip on-line measurement system and its measurement method | |
| CN206497001U (en) | Artificial detection blast furnace gas dust content device | |
| CN104111215B (en) | A kind of fine particle continuous monitor based on oscillating balance | |
| CN106501150A (en) | A kind of mouth mask strainability tester | |
| CN104390818A (en) | Smoke constant speed constant current sampling device and method | |
| CN111982784A (en) | PM2.5 cutterbar characteristic calibrating device | |
| CN217717121U (en) | Particulate matter trapping device | |
| KR20210100283A (en) | Beta-ray type chimney fine dust measuring device with diffusion pipe | |
| CN204241286U (en) | Flue gas constant speed constant-flow sampling device | |
| CN207730511U (en) | Atmospheric sampling detector two-way type sampling head | |
| CN207866583U (en) | A kind of sample automatic acquisition device | |
| CN102087193B (en) | Cigarette smoke aerosol testing device | |
| CN201876383U (en) | Sampling gun | |
| CN107328618A (en) | A kind of sampling system for apparatus assembly volatile organic matter | |
| CN104374612B (en) | Constant-temperature rapid air sampling device and using method thereof | |
| CN208937471U (en) | A kind of filter capability test device | |
| CN107238560B (en) | Constant-speed balance smoke dust particle concentration direct-reading portable measuring system and method | |
| CN206234977U (en) | A kind of air quality detector device that can control VMC |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |