CN219475505U - Water body VOC sample collector and automated inspection appearance - Google Patents

Abstract

The utility model relates to a water VOC sample collector and automated inspection appearance, water VOC sample collector includes the collector main part, establish collection chamber in the collector main part, can dismantle the trap of fixing in the collector main part, a plurality of first connecting tube who establishes in the collector main part, articulated sealed apron in the collector main part, establish a plurality of second connecting tube on sealed apron, establish the switching-over valve on the second connecting tube, be connected drain pipe and be used for injecting the air source of nitrogen gas and air in to first connecting tube with an output of switching-over valve with first connecting tube connection. The automatic detector comprises the water body VOC sample collector. The utility model discloses a water VOC sample collector and automated inspection appearance can sweep the complement processing to the water sample in the scene for reduce the weight of water sample, and the adsorption capacity of trap is stronger, can avoid the escape problem that VOC produced in the transportation, can make the testing result more accurate.

Description

Water body VOC sample collector and automated inspection appearance

Technical Field

The application relates to the technical field, in particular to a water body VOC sample collector and an automatic detector.

Background

VOC in the environment protection sense refers to active volatile organic compounds, namely volatile organic compounds which can generate harm. The in-water VOC monitor adopts dynamic stripping and trapping gas chromatography, the specific process is that a water sample is subjected to on-line sweeping and trapping probes, the blown VOC is trapped in a trapping trap filled with filler such as TENAX and the like, the trapping trap is subjected to rapid heating and desorption, the target compound is transferred to a GC chromatographic column, the VOC is separated in the GC chromatographic column, and then the VOC is detected by a detector and a chromatogram is generated. The concentration of various VOC substances in the water is obtained by comparison with the standard substance chromatogram.

The above-described detection process needs to be performed in a laboratory because inert gas is consumed in the detection process and a large-sized detection apparatus such as a spectrometer is required. The current detection mode is that a worker samples at each detection point and sends the sample back to a laboratory for detection.

Considering the multiple factors such as the distance, the number of samples, scattered distribution of detection points and the like, a large number of water samples can be brought back by workers at a time, and the water samples are large in volume and heavy in weight; in the long-time transportation process, the water body sample also has the escape problem, so that the detection result is inaccurate.

Disclosure of Invention

The utility model provides a water VOC sample collector and automated inspection appearance can sweep the complement processing to the water sample in the scene for reduce the weight of water sample, and the adsorption capacity of trap is stronger, can avoid the escape problem that VOC produced in the transportation, can make the testing result more accurate.

The above object of the present application is achieved by the following technical solutions:

in a first aspect, the present application provides a water body VOC sample collector comprising:

a collector body;

the acquisition cavity is arranged on the collector main body;

the catcher is detachably fixed on the collector main body;

the first connecting pipelines are arranged on the collector main body, and the first ends of the first connecting pipelines extend into the collecting cavity;

the sealing cover plate is used for sealing the collection cavity;

the first connecting pipelines are arranged on the sealing cover plate, the first ends of the second connecting pipelines can extend into the collecting cavity, and the second ends are used for being connected with the catcher;

the reversing valve is arranged on the second connecting pipeline;

the drain pipe is connected with one output end of the reversing valve; and

and the air source is connected with the first connecting pipeline and is used for injecting nitrogen and air into the first connecting pipeline.

In one possible implementation of the first aspect, the reversing valve is a manual valve.

In a possible implementation manner of the first aspect, the reversing valve is an electronic valve;

the control button is arranged on the collector main body and is electrically connected with the reversing valve.

In a possible implementation manner of the first aspect, the trap has a plurality of trapping wells, and two ends of each trapping well are respectively used for being connected with the first connecting pipeline and the second connecting pipeline.

In a possible implementation manner of the first aspect, the connection manner of the catcher and the collector body is plugging.

In a possible implementation manner of the first aspect, the first connection pipe is connected to the trap in a plugging manner.

In a possible implementation manner of the first aspect, the second ends of the second connecting pipes are fixed on the connecting plate;

the second end of the second connecting pipeline is connected with the catcher in a plugging manner.

In a second aspect, the present application provides an automatic detector comprising a water body VOC sample collector as described in the first aspect and any implementation manner of the first aspect

Drawings

Fig. 1 is a schematic structural view of a sample collector provided in the present application.

Fig. 2 is a schematic structural view of a sample container provided in the present application.

Fig. 3 is a schematic view of airflow direction during an acquisition process provided herein.

Fig. 4 is a schematic structural view of a catcher provided in the present application.

Fig. 5 is a schematic diagram of connection of the second connecting pipe to the sealing cover plate and the connecting plate.

Fig. 6 is a schematic diagram of a control principle of a reversing valve provided in the present application.

In the figure, 11, collector main body, 12, collection cavity, 13, first connecting pipeline, 14, sealing cover plate, 15, second connecting pipeline, 21, reversing valve, 22, drain pipe, 23, air source, 31, trap well, 3, trap, 4, connecting plate, 6, control button.

Detailed Description

The technical solutions in the present application are described in further detail below with reference to the accompanying drawings.

Please refer to fig. 1 and 2, for a water body VOC sample collector disclosed in the present application, the sample collector is composed of a collector main body 11, a collecting cavity 12, a first connecting pipeline 13, a sealing cover plate 14, a second connecting pipeline 15, a reversing valve 21, a drain pipe 22, an air source 23, a catcher 3, and the like, wherein the collecting cavity 12 is arranged on the collector main body 11, and is used for fixing a sample container for containing a water body sample, and the sample container for containing the water body sample is directly inserted into the collecting cavity 12 when being processed.

Referring to fig. 3, the trap 3 is detachably fixed on the collector body 11, and is used for forming a gas purging channel with a sample container containing a water body sample by means of the first connecting pipeline 13 and the second connecting pipeline 15, and transferring VOCs in the water body sample into the trap 3 by means of gas purging.

Referring to fig. 4, the catcher 3 has a plurality of catcher wells 31, the input ends of the catcher wells 31 are connected with the second connecting pipe 15, and the output ends are open ends. The input end of the trapping well 31 is provided with a rubber plug, the output end is plugged by a ventilation film, and after sampling is completed, the two ends of the trapping well 31 are sealed by end covers.

In some possible implementations, the trap 3 is connected to the collector body 11 by plugging.

The number of first connecting pipes 13 is plural, these first connecting pipes 13 are all arranged on the collector body 11, the first ends of the first connecting pipes 13 extend into the collecting chamber 12, and the second ends are used for connecting with the catcher 3. The number of second connecting ducts 15 is the same as the number of first connecting ducts 13, the first ends of the second connecting ducts 15 being able to extend into the collection chamber 12 and the second ends being intended to be connected with the trap 3.

In some possible implementations, the second end of the first connection pipe 13 is connected to the trap 3 in a plug-in manner.

Referring to fig. 1 and 5, the second connecting pipe 15 is fixed to the sealing cover 14, and the sealing cover 14 is used for closing the collecting cavity 12. Such that the first end of the second connecting conduit 15 is directly connected to the sample container when the sealing cover 14 is secured to the collector body 11.

In some possible implementations, the sealing cover 14 is connected to the collector body 11 in a plug-in manner, the sealing cover 14 is pressed onto the collector body 11 when installed, and the sealing cover 14 is snapped off from the collector body 11 when detached.

In some possible implementations, the second ends of the second connecting ducts 15 are each fixed to the connecting plate 4 in such a way that the second ends of a plurality of second connecting ducts 15 can be connected to the catcher 3 at the same time.

Referring to fig. 1, a reversing valve 21 is further installed on the first connecting pipe 13, and an output end of the reversing valve 21 is connected to a drain pipe 22, and the drain pipe 22 is used for draining and exhausting water during the purge regeneration of the trap 3.

The nitrogen and air consumed in the water sample purge (using nitrogen) and the trap 3 purge regeneration process (using oxygen) are provided by a gas source 23, the gas source 23 being connected to the first connection pipe 13 for injecting nitrogen and air into the first connection pipe 13.

The purging process of the water body sample is as follows:

installing a sample container containing a water body sample into the collection cavity 12, and inserting the first end of the first connecting pipeline 13 back into the sample container at the moment; the sealing cover plate 14 is then mounted on the collector body 11, with the first end of the second connecting tubing 15 inserted into the sample container.

Then the air source 23 is started, nitrogen is injected into the first connecting pipeline 13, the nitrogen passes through the water body sample in the sample container, and VOCs in the water body sample are driven to enter the catcher 3 through the second connecting pipeline 15. After the completion of the replenishing process, the air source 23 is stopped, the reversing valve 21 is opened, and the catcher 3 is removed.

At this time, the water sample in the sample container is discharged through the drain pipe 22, after the water is discharged, the air source 23 is started again, air is injected into the first connecting pipeline 13, the sample container and the second connecting pipeline 15, and the inner walls of the first connecting pipeline 13, the sample container and the second connecting pipeline 15 are dried by the air flowing at a high speed.

Of course, in the above process, the draining and drying may be performed after the fresh water is injected into the sample container using the needle tube, and repeated several times until the first connection pipe 13, the sample container and the second connection pipe 15 are cleaned.

It should be understood that the gas source 23 may use a nitrogen generator using Carbon Molecular Sieve (CMS) as an adsorbent to separate air using Pressure Swing Adsorption (PSA) at normal temperature to produce high purity nitrogen. The Carbon Molecular Sieve (CMS) is not activated when air is produced from air source 23.

The reversing valve 21 has two types, i.e., a manual valve and an electronic valve, and when the electronic valve is used, referring to fig. 6, a control button 6 is required to be provided, and the control button 6 is electrically connected to the reversing valve 21, so as to simultaneously control the plurality of reversing valves 21 to complete the switching operation. The power supply supplies power to the reversing valve 21 through the control button 6, and the control button 6 provides two buttons of on (motor forward rotation) and off (motor reverse rotation)

The application also discloses an automatic detector, including arbitrary water VOC sample collector who records in the above-mentioned content. The water body VOC sample collector described in the above is mounted in a vehicle, the vehicle moves at each collection point to complete the sampling work, the collected sample is placed in an automatic detector for analysis, the automatic detector has the function of rapidly heating and desorbing the catcher 3, transferring the target compound to a GC column, separating VOC in the GC column, and then detecting and generating a chromatogram in the detector.

The embodiments of the present utility model are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in this way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. A water VOC sample collector, comprising:

a collector body (11);

the acquisition cavity (12) is arranged on the acquisition device main body (11);

the catcher (3) is detachably fixed on the collector main body (11);

the first connecting pipelines (13) are arranged on the collector main body (11), and first ends of the first connecting pipelines (13) extend into the collecting cavity (12);

a sealing cover plate (14) for closing the collection chamber (12);

the second connecting pipelines (15) are arranged on the sealing cover plate (14), the first ends of the second connecting pipelines (15) can extend into the collecting cavity (12), and the second ends are used for being connected with the catcher (3);

a reversing valve (21) arranged on the first connecting pipeline (13);

a drain pipe (22) connected to one output end of the reversing valve (21); and

and the air source (23) is connected with the first connecting pipeline (13) and is used for injecting nitrogen and air into the first connecting pipeline (13).

2. The water VOC sample collector of claim 1 wherein the reversing valve (21) is a manual valve.

3. The water VOC sample collector of claim 1 wherein the reversing valve (21) is an electronic valve;

the automatic control device also comprises a control button (6) arranged on the collector main body (11), and the control button (6) is electrically connected with the reversing valve (21).

4. A water VOC sample collector according to any of claims 1-3, characterized in that the collector (3) has a plurality of collector wells (31), each collector well (31) being at both ends for connection with the first connection pipe (13) and the second connection pipe (15), respectively.

5. The water body VOC sample collector as claimed in claim 4 wherein the trap (3) is connected to the collector body (11) in a plug-in manner.

6. The water body VOC sample collector as claimed in claim 4 wherein the first connecting pipe (13) is connected to the trap (3) in a plug-in manner.

7. The water VOC sample collector according to claim 6, characterized in that the second ends of the second connecting pipes (15) are each fixed on the connecting plate (4);

the second end of the second connecting pipeline (15) is connected with the catcher (3) in a plugging way.

8. An automatic detector comprising a water VOC sample collector according to any one of claims 1 to 7.