CN218865598U - Multi-path air bag sampler - Google Patents
Multi-path air bag sampler Download PDFInfo
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- CN218865598U CN218865598U CN202122961745.2U CN202122961745U CN218865598U CN 218865598 U CN218865598 U CN 218865598U CN 202122961745 U CN202122961745 U CN 202122961745U CN 218865598 U CN218865598 U CN 218865598U
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Abstract
The utility model discloses a multipath air bag sampler, which comprises a vacuum box and a host machine; n air bags are arranged in the vacuum box; a gas path pipeline is arranged in the main machine, electromagnetic valves corresponding to the number of the air bags are arranged on the pipeline, and the pipeline is connected with the corresponding air bags through the electromagnetic valves; the electromagnetic valve is positioned in the host and is in control connection with a single chip microcomputer in the host, and the host is also internally provided with a cabin pressure sensor, an atmospheric pressure sensor, an ambient temperature sensor, an air extraction power assembly and an operation assembly which are in control connection with the single chip microcomputer. Has the beneficial effects that: the cross contamination of samples is avoided; the air bag cleaning, the air replacement and the automatic collection of a plurality of air bag samples can be automatically completed; the requirements of various sampling control can be met; and monitoring the pressure in real time, and automatically protecting the full air bag.
Description
Technical Field
The utility model relates to an air pocket sample thief technical field relates to a multichannel air pocket sample thief particularly.
Background
The vacuum box air bag sampler collects various gases by using a negative pressure method, is particularly suitable for sampling volatile organic compounds, and can be used for collecting various sample gases by departments of environmental protection, sanitation, labor, security inspection, scientific research, education and the like. However, according to the requirement of HJ/T55-2000 'guide rule for monitoring the inorganized emission of atmospheric pollutants', when monitoring inorganized emission is carried out, continuous sampling for 1h is carried out, or the average value of 4 samples is collected at equal time intervals within 1 h. The existing vacuum box sampler in the market can only collect one air bag sample at a time, can collect full air bags within a few minutes, and cannot obtain continuous sample gas within 1h, so the collected sample gas cannot represent the average sample gas condition within 1h, and cannot meet the requirements in the HJ/T55-2000 standard.
Aiming at the sampling requirement of HJ/T55-2000 'guide rule of the inorganization emission monitoring technology of atmospheric pollutants', no instrument which can collect a plurality of samples at equal time intervals within one hour or continuously collect one hour of samples by using one air bag is available in the market at present.
SUMMERY OF THE UTILITY MODEL
To the problem among the correlation technique, the utility model provides a multichannel air pocket sample thief can set up on-the-spot unmanned on duty according to the procedure and gather a plurality of samples with equal time interval in an hour, and still can accomplish the air pocket automatically and wash and the automatic replacement of gaseous in the air pocket, improves sampling personnel's work efficiency, solves the above-mentioned not enough of sampling technique.
Therefore, the utility model discloses a specific technical scheme as follows:
a multi-path air bag sampler comprises a vacuum box and a host machine; n air bags are arranged in the vacuum box; the main machine is internally provided with a gas path pipeline, the pipeline is connected with electromagnetic valves corresponding to the number of the gas bags in series, and the gas bags are connected with the corresponding pipelines through the corresponding electromagnetic valves; the electromagnetic valve is positioned in the host and is in control connection with a single chip microcomputer in the host; the host is also internally provided with a cabin pressure sensor, an atmospheric pressure sensor, an ambient temperature sensor, an air extraction power assembly and an operation assembly which are electrically connected with the single chip microcomputer; the air path of the air exhaust power assembly is communicated with the inside of the vacuum box; the cabin pressure sensor is communicated with the inside of the vacuum box through a gas circuit.
Preferably, the pipeline is externally connected with a heating sampling pipe, and the pipeline is connected with the heating sampling pipe through a heat tracing connecting pipe.
Optimally, the numerical range of N is 2 to 24.
Optimally, N is 4.
Preferably, the control assembly comprises a display screen and a keyboard which are electrically connected with the single chip microcomputer.
Preferably, the side wall of the vacuum box is provided with air nozzles communicated with the inside of the vacuum box, the number of the air nozzles is N +2, one of the air nozzles is connected with the air extraction power assembly through an air path, one air nozzle is connected and communicated with a cabin pressure sensor in the host machine through the air path, and two ends of the rest N air nozzles are respectively communicated with corresponding electromagnetic valves and air bags.
Preferably, the N air bags are sequentially arranged from left to right in the vacuum box.
The utility model has the advantages that: when the vacuum box is in a negative pressure state, the gas sample is collected in the air bag by utilizing the pressure difference between the vacuum box and the outside; the collected sample gas does not pass through air extraction power, so that cross contamination during sample sampling is avoided; the purposes of cleaning the air bag, replacing the air and automatically collecting N air bag samples can be automatically finished by utilizing the program control of the singlechip; the requirement of collecting a plurality of samples at equal time intervals within one hour (or longer) can be met; in the sampling process, various sampling mode programs such as automatic cleaning sampling, delayed cleaning sampling, simultaneous sampling of N cleaned air bags and the like can be set so as to meet the requirements of various different sampling controls; the automatic protection device also has the functions of monitoring the pressure in the vacuum box in real time and automatically protecting the full air bag.
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 creative efforts.
FIG. 1 is a schematic view showing the structure of a multi-way air bag sampler in embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a multi-way exhaust gas bag sampler in embodiment 3 of the present invention;
fig. 3 is a schematic structural view of a multi-path air bag sampler in embodiment 2 of the present invention;
fig. 4 is a schematic structural view of a multi-path air bag sampler in embodiment 4 of the present invention.
In the figure:
1. a vacuum box; 2. a host; 3. heating the sampling tube; 4. a cabin pressure sensor; 5. an air bag; 6. a pipeline; 7. an electromagnetic valve; 8. a single chip microcomputer; 9. an ambient temperature sensor; 10. an atmospheric pressure sensor; 11. an air extraction power assembly; 12. a manipulation component; 13. a heat tracing connecting pipe; 14. a keyboard; 15. a display screen; 16. an air tap.
Detailed Description
For further explanation of the embodiments, the drawings are provided as part of the disclosure and serve primarily to illustrate the embodiments and, together with the description, to explain the principles of operation of the embodiments, and to provide further explanation of the invention and advantages thereof, it will be understood by those skilled in the art that various other embodiments and advantages of the invention are possible, and that elements in the drawings are not to scale and that like reference numerals are generally used to designate like elements.
Example 1:
as shown in fig. 1, the multi-path air bag sampler of the present embodiment includes a vacuum box 1 and a main machine 2, wherein four air bags 5 are disposed in the vacuum box 1, and the air bags 5 are sequentially arranged from left to right in the vacuum box 1.
The host machine 2 is internally provided with a gas path pipeline 6, the pipeline 6 is connected with electromagnetic valves 7 corresponding to the number of the gas bags 5 in series, the gas bags 5 are connected with the pipeline 6 through the corresponding electromagnetic valves 7, and the electromagnetic valves 7 and the corresponding gas bags 5 are connected with gas nozzles 16 through gas paths; the electromagnetic valve 7 is located inside the host machine 2 and is in control connection with a single chip microcomputer 8 in the host machine 2, the host machine 2 is also internally provided with a cabin pressure sensor 4, an atmospheric pressure sensor 10, an ambient temperature sensor 9, an air exhaust power assembly 11 and an operation assembly 12 which are in control connection with the single chip microcomputer 8, and the operation assembly 12 comprises a display screen 15 and a keyboard 14 which are electrically connected with the single chip microcomputer 8.
Six air nozzles 16 are arranged on the side wall of the vacuum box 1 and communicated with the inside of the vacuum box 1. One air nozzle 16 is connected with the air extraction power assembly 11 through an air passage, and the air passage of the air extraction power assembly 11 extends to the inside of the vacuum box 1 through the air nozzle 16; an air nozzle 16 connects and communicates the inside of the vacuum box 1 with the cabin pressure sensor 4 in the host machine 2 through an air path; two ends of the other four air nozzles 16 are respectively connected with the corresponding electromagnetic valve 7 and the corresponding air bag 5 through air passages.
Example 2:
referring to fig. 3, referring to fig. 1, the multi-path air bag sampler of the present embodiment is different from the multi-path air bag sampler of the first embodiment in that N air bags 5, N =2 to 24 are provided, that is, an air bag i, an air bag ii, and an air bag N … … are sequentially provided in the vacuum chamber 1 from left to right; correspondingly, the quantity of solenoid valve 7 also is N in this embodiment, and the quantity of air cock 16 is N +2, and other gas circuit structures are all unanimous. Embodiment one is a special case of N =4 in this embodiment.
Example 3:
as shown in fig. 2, the multi-way air bag sampler of the present embodiment is different from the multi-way air bag sampler of the first embodiment in that the pipeline 6 is externally connected to the heating sampling tube 3, and the pipeline 6 and the heating sampling tube 3 are connected by a heat tracing connecting tube 13. The whole structure is as follows:
the multi-path air bag sampler comprises a vacuum box 1, a host machine 2, a heating sampling pipe 3 and a heat tracing connecting pipe 13, wherein four air bags 5 are arranged in the vacuum box 1, and the air bags 5 are sequentially arranged in the vacuum box 1 from left to right.
Be provided with gas circuit pipeline 6 in the host computer 2, the external heating sampling pipe 3 of pipeline 6, be connected through companion's heat connecting pipe 13 between pipeline 6 and the heating sampling pipe 3.
The pipeline 6 is connected with electromagnetic valves 7 corresponding to the number of the air bags 5 in series, the air bags 5 are connected with the pipeline 6 through the corresponding electromagnetic valves 7, and the electromagnetic valves 7 and the corresponding air bags 5 are connected with an air tap 16 through air paths; the electromagnetic valve 7 is located inside the host machine 2 and is in control connection with a single chip microcomputer 8 in the host machine 2, the host machine 2 is also internally provided with a cabin pressure sensor 4, an atmospheric pressure sensor 10, an ambient temperature sensor 9, an air exhaust power assembly 11 and an operation assembly 12 which are in control connection with the single chip microcomputer 8, and the operation assembly 12 comprises a display screen 15 and a keyboard 14 which are electrically connected with the single chip microcomputer 8.
Six air nozzles 16 are arranged on the side wall of the vacuum box 1 and communicated with the inside of the vacuum box 1. One air nozzle 16 is connected with the air extraction power assembly 11 through an air passage, and the air passage of the air extraction power assembly 11 extends to the inside of the vacuum box 1 through the air nozzle 16; an air nozzle 16 connects and communicates the inside of the vacuum box 1 with the cabin pressure sensor 4 in the host machine 2 through an air path; two ends of the other four air nozzles 16 are respectively connected with the corresponding electromagnetic valve 7 and the corresponding air bag 5 through air passages.
Example 4:
as shown in fig. 4, referring to fig. 2, the multi-path air bag sampler of the present embodiment is different from the exhaust gas air bag sampler of the embodiment 3 in that N air bags 5, N =2 to 24 are provided, that is, an air bag one, an air bag two, and a … … air bag N are sequentially provided in the vacuum chamber 1 from left to right; correspondingly, the quantity of solenoid valve 7 also is N in this embodiment, and the quantity of air cock is N +2, and other gas circuit structures are all unanimous. Example 3 is a special case of N =4 in this example.
The multi-path air bag sampler of each embodiment has various applications. The multi-way air bag samplers of examples 1 and 2 are suitable for collecting air samples, and the multi-way air bag samplers of examples 3 and 4 are suitable for collecting exhaust gas samples in an exhaust gas discharge pipeline. The air inlet of the heating sampling pipe is inserted into the waste gas discharge pipeline, the air outlet is connected with the air inlet of the heat tracing connecting pipe in series, and the air outlet of the heat tracing connecting pipe is connected with the air inlet of the host in series. The heating sampling pipe and the heat tracing connecting pipe can heat the gas circuit during sampling, and the heating temperature can be set at any temperature within the range of (0-200) DEG C.
The following operations can be performed by taking the multi-way air bag samplers of embodiments 1 and 3 as an example.
Automatic cleaning and sampling of an air bag: the bag was immediately cleaned (gas replacement) 3 times. After the cleaning is finished, the electromagnetic valve corresponding to the first air bag is opened, the electromagnetic valves corresponding to the other three air bags are in a closed state, the air exhaust power assembly is started to exhaust air, when the pressure value in the vacuum box reaches a set pressure value or reaches set air suction time, the air exhaust power assembly stops exhausting air, and the electromagnetic valve corresponding to the first air bag is closed at a proper time through program control to ensure that the air bags are full. And analogizing by analogy, after 20 minutes, the electromagnetic valve corresponding to the second air bag is opened, after 40 minutes, the electromagnetic valve corresponding to the third air bag is opened, and after 60 minutes, the electromagnetic valve corresponding to the fourth air bag is opened, and full samples are collected according to the same control mode as the first air bag.
Cleaning and sampling a delayed air bag: the starting time, the cleaning times and the sampling interval time of two adjacent air bags can be set. After the setting is finished, a start/stop key is pressed, the starting time is reached, the sampler starts to clean the air bags according to the set cleaning times, after the cleaning is finished, the first air bag starts to sample, the sampling is stopped after the full sample is collected, and then the second air bag, the third air bag and the fourth air bag are started to sample in sequence according to the setting of interval time.
After cleaning, four air bags are sampled simultaneously: the start time and the number of times of cleaning can be set. And after the setting is finished, pressing a start/stop key, starting the air bag cleaning by the sampler according to the set cleaning times when the starting time is reached, simultaneously sampling the four air bags after the cleaning is finished, and stopping sampling after the four air bags are fully collected.
For the convenience of understanding the above technical solution of the present invention, the following description will be made in detail by taking the multi-way air bag sampler of embodiment 3 of the present invention as an example.
In practical application, when the air bags are cleaned, all the electromagnetic valves corresponding to the four air bags are opened, when the air bags are inflated, the air pumping power assembly is controlled by a program to pump air from the vacuum box, when the pressure in the vacuum box is lower than the pressure of a fixed pollution source flue, under the action of pressure difference between the vacuum box and the fixed pollution source flue, the waste gas of the fixed pollution source sequentially passes through the heating sampling pipe, the heat tracing connecting pipe, the pipeline and the electromagnetic valves to enter the air bags, and when the pressure value in the vacuum box reaches a set pressure value or reaches a set air suction time, the air pumping power assembly stops pumping air, and the air bags are full; when the air bag exhausts, the air exhaust power component exhausts air (positive pressure) into the vacuum box under program control, so that the pressure in the vacuum box is higher than that in the fixed pollution source flue, the air in the air bag is exhausted into the fixed pollution source flue through the electromagnetic valve, the pipeline, the heat tracing connecting pipe and the heating sampling pipe sequentially under the action of the pressure difference between the inside of the vacuum box and the fixed pollution source flue, and the air exhaust power component stops working until the pressure value in the vacuum box reaches a set exhaust pressure value or exhaust time, so that all the air in the air bag is exhausted, and the internal cleaning and air replacement of the air bag are finished. When sampling is carried out, the electromagnetic valves corresponding to the four air bags are set to be opened according to a sampling mode, the air exhaust power assembly exhausts air (negative pressure) from the vacuum box to enable the pressure value in the vacuum box to be lower than the pressure value of a fixed pollution source flue, under the action of pressure difference between the vacuum box and the fixed pollution source flue, the waste gas of the fixed pollution source sequentially passes through the heating sampling pipe, the heat tracing connecting pipe, the pipeline and the electromagnetic valves to enter the corresponding air bags, when the pressure value in the vacuum box reaches a set pressure value or reaches a set air suction time, the air exhaust power assembly stops exhausting air, the electromagnetic valves corresponding to the four air bags are closed at a proper time through program control, and the air bags are ensured to be full. During the working process of the sampler, the pressure in the vacuum box is monitored in real time all the time, and once the pressure value in the vacuum box reaches the set pressure value, the air exhaust power assembly stops working, so that the air bag is prevented from being burst due to overlarge pressure difference between the inside and the outside of the vacuum box, and the function of automatic protection when the air bag is full is realized.
To sum up, with the help of the above technical scheme of the utility model: when the vacuum box is in a negative pressure state, the gas sample is collected in the air bag by utilizing the pressure difference between the vacuum box and the outside; the collected sample gas does not pass through air extraction power, so that cross contamination during sample sampling is avoided; the purposes of cleaning the air bag, replacing the air and automatically collecting N air bag samples can be automatically finished by utilizing the program control of the singlechip; the requirement of collecting a plurality of samples at equal time intervals within one hour (or more) can be met; in the sampling process, various sampling modes such as automatic cleaning sampling, delayed cleaning sampling, simultaneous sampling of N cleaned air bags and the like can be set, so that the requirements of various sampling controls are met; the automatic protection device also has the functions of monitoring the pressure in the vacuum box in real time and automatically protecting the full air bag.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection of the present invention.
Claims (7)
1. A multi-path air bag sampler is characterized by comprising a vacuum box (1) and a host (2); n air bags (5) are arranged in the vacuum box (1); a gas path pipeline (6) is arranged in the main machine (2), electromagnetic valves (7) with the number corresponding to that of the gas bags (5) are arranged on the pipeline (6) in parallel, and the pipeline (6) is connected with the corresponding gas bags (5) through the electromagnetic valves (7); the electromagnetic valve (7) is located inside the host (2) and is in control connection with a single chip microcomputer (8) in the host (2), the host (2) is also internally provided with a cabin pressure sensor (4), an atmospheric pressure sensor (10), an ambient temperature sensor (9), an air exhaust power assembly (11) and an operation assembly (12) which are in control connection with the single chip microcomputer (8), an air exhaust pipe of the air exhaust power assembly (11) extends to the inside of the vacuum box (1), and the cabin pressure sensor (4) is communicated with the inside of the vacuum box (1) through an air path.
2. The multi-path air bag sampler according to claim 1, wherein the pipeline (6) is externally connected with the heating sampling pipe (3), and the pipeline (6) is connected with the heating sampling pipe (3) through a heat tracing connecting pipe (13).
3. The multi-way air bag sampler according to claim 1 or 2, wherein N has a value ranging from 2 to 24.
4. The multi-way air bag sampler of claim 3, wherein N is 4.
5. The multiple air bag sampler according to claim 2, wherein the manipulation assembly (12) comprises a display screen (14) and a keyboard (15) electrically connected to the single-chip microcomputer (8).
6. The multi-path air bag sampler according to claim 2, wherein air nozzles (16) are arranged on the side wall of the vacuum box (1) and are communicated with the inside of the vacuum box (1), the number of the air nozzles (16) is N +2, one air nozzle (16) is connected with the air extraction power assembly (11) through an air path, one air nozzle (16) is connected and communicated with the cabin pressure sensor (4) in the main machine (2) through an air path, and the two ends of the other N air nozzles (16) are respectively communicated with the corresponding electromagnetic valve (7) and the air bag (5).
7. The multi-way air bag sampler according to claim 2, wherein the N air bags (5) are arranged in sequence from left to right within the vacuum box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122961745.2U CN218865598U (en) | 2021-11-30 | 2021-11-30 | Multi-path air bag sampler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122961745.2U CN218865598U (en) | 2021-11-30 | 2021-11-30 | Multi-path air bag sampler |
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| Publication Number | Publication Date |
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| CN218865598U true CN218865598U (en) | 2023-04-14 |
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| CN202122961745.2U Active CN218865598U (en) | 2021-11-30 | 2021-11-30 | Multi-path air bag sampler |
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| CN (1) | CN218865598U (en) |
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- 2021-11-30 CN CN202122961745.2U patent/CN218865598U/en active Active
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