JPH09243532A - Multi-cotmponent gas sampler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly determine many kinds of gases by optional detecting tubes by turning a plurality of the gas-detecting tubes to a negative pressure and sucking generated gases. SOLUTION: An air cock 21 of a multi-component gas sampler is closed, a stop valve 16 is opened and a cylinder 20 is connected with a compression air connection port 23. Then, sealed both end parts of each of a plurality of gas-detecting tubes to be used are cut and connected respectively to connection ports 6 of the gas sampler and penetration holes of a holding plate. An air feed valve 10 at the connection port 6 is inserted to open a branch pipe 11 at an optional spot where a gas is to be sampled, and also the cock 21 is opened. A pressure is confirmed by a vacuum gauge 17 and regulated at 22 to be 20cmHg. For this purpose, an internal space of the branch pipe 11 and a main pipe 15 sending the compressed air from the cylinder 20 to each detecting tube via a vacuum generator 19 is turned to a negative pressure. The detecting tube sucks and collects the gas to be determined. The cock 21 is closed one minute after the gas is sampled. The presence/absence of a color change by a reagent is confirmed at the detecting tube. In this manner, kinds of gases can be determined immediately without requiring a reaction in many stages.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas sampler for a vacuum type gas detection tube, which is capable of sampling a plurality of gas types at once.

[0002]

2. Description of the Related Art Conventionally, a gas sampler is a manual type metering pump used in a detector tube type gas measuring device, and one end side of the detector tube in which reagents and the like are contained in an elongated glass tube in the gas sampler. The openings are connected by a rubber tube or the like to connect the internal spaces of the gas sampling device and the detection tube.

Then, by pulling the manual piston of the gas sampler, the inside of the cylinder of the gas sampler is evacuated, and the gas to be judged is sucked into the detector tube from the other end opening of the detector tube. Is.

The gas sucked into the detector tube reacts with the reagent or the like due to its nature, and the presence or absence of the reaction is visually confirmed, and as shown in FIG. It is to determine what the gas is and what type of gas it is. In this way, it is used for gas determination with respect to gas and extraordinary gas generation in the working environment.

[0005]

However, in the gas sampling device using the manual metering pump, a large number of various detection tubes are changed one after another according to the reaction map depending on the presence / absence of reaction in the gas generation site. ,
Must be sampled with a gas sampler in multiple stages. Therefore, since the type of gas can be known only after undergoing a plurality of determination steps, it takes a lot of time and effort to connect and extract the detection tube, and to remove the detection tube, which makes quick determination difficult. There is a problem.

Further, gas is sampled in the cylinder by a gas sampler, the gas sampler is connected to a gas analyzer and the like, and the gas is injected into the gas analyzer from the inside of the cylinder. However, the gas analyzer is usually a complicated and large-scale device, which is located at a fixed place such as a factory or a research laboratory, and cannot be carried anywhere. Therefore, there is a problem that it is not possible to make a quick determination at an arbitrary gas generation place.

As described above, the conventional gas sampler has a problem to be solved in making a quick determination at an arbitrary gas generation place.

[0008]

The gist of the gas sampler according to the present invention for solving the above-mentioned problems is to provide a holding means for holding a plurality of gas detection pipes, and a negative pressure in the gas detection pipes to allow the outside air to flow. The gas detection tube and the suction means are connected via a connection means capable of simultaneous suction or selective suction.

The connecting means comprises a branch pipe connected to each of a plurality of gas detection pipes and a main pipe connecting the branch pipes together to the suction means; A suction pressure equalizing means for equalizing the suction pressure of the gas in the gas detection pipe is provided; and the connecting means is provided with a ventilation valve for opening and closing the flow path in each of the branch pipes. A main valve is provided with a stop valve for opening and closing the flow path; and a vacuum gauge is provided between the ventilation valve and the stop valve; the holding means, the suction means, and the communication means Is mounted on one frame, and the frame is provided with a large gripping member so that it can be carried; the suction means includes a removable cylinder, an air cock for opening and closing a flow path, and a flow rate. It consists of a regulating valve.

According to the multi-component gas sampler of the present invention,
The gas generated at an arbitrary place can be sampled and sampled in a large number of gas detector tubes at a time to quickly identify the gas. Further, since it is excellent in portability, it is possible to bring it to any place and collect gas.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a gas sampler according to the present invention will be described in detail with reference to the drawings. A first embodiment of a gas sampler according to the present invention is, as shown in FIGS. 1 to 4, a frame 2 made of an aluminum alloy for the gas sampler 1 and formed in a rectangular shape with a required width. Further, a holding plate 4 which is a flat plate-shaped holding means having a plurality of holding through holes 3 is provided on the tip side.

[0012] The wall surface of the valve block 5 in the central portion of the frame 2 and the valve block 5a on the rear side of the frame 2 are provided with detection pipes so as to face the through holes 3 of the holding plate 4 at horizontal positions respectively. A plurality of connection ports 6 are provided. Since the valve block 5a is provided with a detection pipe connection port 6 for a detection pipe 12 for a dual pipe in which a reaction pipe and a measurement pipe (for measuring concentration) are connected by a rubber pipe or the like, a rear portion of the frame 2 is provided. It is arranged nearer.

For supporting the detection pipe 12 for the double pipe,
A dual pipe pressing plate 4a is provided between the holding plate 4 and the valve book 5a. Further, on both side surfaces of the holding plate 4, a detection tube 12, which will be described later, protruding from the surface of the holding plate 4,
Flat plate-shaped guard plates 7 and 7 for protecting the end portions 12a and 13a of 13 are provided.

As shown in FIG. 5, the connection port 6 for the detector tube is
An inlet nut 6a having a tubular shape and having a grip portion and a screw portion for fixing the periphery thereof, and a rubber inlet which is inserted into a through hole of the inlet nut 6a and to which the detection pipe 13 is connected to a tubular end portion. It is composed of a rubber 6b and a rubber or plastic packing 6c.

The resistance tube 8 (suction time 1 which is suction pressure equalizing means for making the suction pressures of the gas detection tubes 12 and 13 equal to each other according to the suction time of the sampled gas behind the packing 6c. A single tube of less than a minute) and a filter tube 9 (for a single tube of a suction time of 1 minute or more) are appropriately selected and used.

The valve block 5 and the valve block 5
The ventilation valve 10 is provided on the rear wall surface of a, and the connection port 6 for each detection pipe is provided.
Each of the branch pipes 11 communicating with the When the ventilation valve 10 is pushed toward the valve block 5, the flow path of the branch pipe 11 is in the "open" state, and when pulled, the flow path of the branch pipe 11 is in the "closed" state.

The branch pipes 11 arranged in the valve blocks 5 and 5a are guided to the suction block 14 at the rear of the frame 2 and integrated into a main pipe 15 which constitutes a connecting means.

The main pipe 15 is provided with a stop valve 16 for opening and closing a flow path, and the stop valve 16 is also provided.
A vacuum gauge 17 is provided between the ventilation valve 11 and the ventilation valve 11.

As shown in FIG. 6, one end of the main pipe 15 is connected to the vacuum generator 19 of the suction means 18. In the suction means 18, for example, compressed air is supplied to the suction passage 18a, for example, a cylinder 20 of a high-pressure container for an air respirator, an air cock 21 for opening and closing the suction passage 18a, and compression of the suction passage 18a. A flow rate adjusting valve 22 that adjusts the flow rate of air is provided.

The cylinder 20 and the suction passage 18a provided on the frame 2 side are connected via a compressed air connection port (coupler) 23. Also, the cylinder 20
There is also a cock for opening and closing.

A large U-shaped gripping member 24 is fixed to the upper portion of the frame body 2. By gripping this, the frame 2 can be carried and carried into an arbitrary place. A hook 25 for attaching the shoulder belt is also fixed to the side surface of the large-sized grip member 24.

The detection tubes 12 and 13 are capable of immediately identifying the gas by obtaining a reaction according to the characteristics of various gases, and many kinds of detection tubes are prepared in advance. Both ends in the longitudinal direction are hermetically sealed, and both ends are cut by a chip holder dedicated to cutting when a gas is determined.

Further, in the first embodiment, the detection tube connection ports 6 are provided at 12 places, and as shown in FIGS. 4 and 6, a connection port group 6d using a resistance tube 8 and a filter. Connection port group 6e using pipe 9 and connection port group 6f for double pipes
And 4 are provided by allocating the connection ports 6 at four locations.

With the multi-component gas sampler 1 of the first embodiment, a method will be described in which a large number of gases are judged at one time after being carried and carried in any place where the gas is generated by carrying it as a handbag or a shoulder bag. .

First, the multi-component gas sampler 1 is inspected before starting work. The air cock 21 of the multi-component gas sampler 1 is closed, and the compressed air connection port (coupler) 23 is fitted with the connecting tube of the cylinder 20 for connection.

Next, the leakage of the flow path between each ventilation valve 11 and the stop valve 16 is checked. To do this, pull the knobs of all the ventilation valves 11 to “close”. Press the knob of the stop valve 16 to open it.

Then, the air cock 21 is set to "open",
Compressed air is introduced from the cylinder 20 into the suction passage 18a, and compressed air is ejected from the vacuum generator 19 to the outside, whereby the air in the main pipe 15 communicating with the vacuum generator 19 is sucked to the outside. The vacuum pressure is reduced, and the vacuum pressure is adjusted so that the pointer of the vacuum gauge 17 indicates approximately 40 cmHg.
Adjust with 2.

Thereafter, the stop valve 16 is "closed".
To The air cock 21 is closed. With this, the flow path of the main pipe 15 becomes a vacuum pressure of about 40 cmHg, and it is confirmed whether or not the pointer of the vacuum gauge 17 fluctuates. It can be seen that if there is no change in the pointer, there is no leakage.

Next, it is confirmed that the detector tube connection port 6 and its flow path are not clogged. To do this, all vent valves 11 are "closed". Similarly to the above, the pointer of the vacuum gauge 17 is set to a vacuum pressure of about 40 cmHg.

Then, one of the twelve connection ports 6 is opened to open the ventilation valve 11. Check the vacuum pressure at this time. The inlet rubber 6b of the one connection port 6
Apply and release your fingertips to your mouth several times to see the pointer quickly swing between the vacuum pressure checked above and the vacuum pressure of 40 cmHg.

This confirms that the one connection port 6 is not clogged. Then, the ventilation valve 11 is closed. This confirmation work is similarly performed on the other connection ports 6 to confirm that the twelve connection ports 6 and their flow paths are not clogged.

After the pre-operation inspection is completed in this way,
Perform gas determination work. First, the air cock 21 of the multi-component gas sampler 1 is closed. The stop valve 16 is opened by pressing the knob. Compressed air connection port (coupler)
A connecting tube of a cylinder (compressed air pressure of 3 Kg / cm ² or more) 20 is fitted into 23 and connected.

Next, the detector tubes 12 and 13 are prepared, and both ends in the longitudinal direction are cut by the chip holder. Then, each of the one end side ports of the detection tube is connected to each connection port 6 of the multi-component gas sampler 1 at the inlet rubber 6b at a position corresponding to the suction time.
And the other end of the detection tube is inserted into the through hole 3 of the holding plate 4.

The ends of the detection tubes 12 and 13 projecting outward from the through holes 3 on the side of the holding plate 4 are protected by being surrounded by the guard plates 7 and 7.

In the detector tube 12 for the double pipe, the reaction tube and the measurement tube are connected by a rubber tube, the measurement tube side port is inserted into the inlet rubber 6b of the connection port 6, and the reaction tube side port is held by a holding plate. Four
Is inserted into the through hole 3 to be penetrated, and the intermediate portion is held by the double pipe pressing plate 4a.

Next, at an arbitrary site, the ventilation valve 11 of the connection port 6 connected to the detector tube from which air is to be taken is pushed in to be "opened". Then, open the air cock 21.
While checking with the vacuum gauge 17, vacuum pressure 20 cmHg
The flow rate adjusting valve 22 is quickly adjusted so that

Then, as shown in FIG. 7, the flow of compressed air from the cylinder 20 causes the vacuum generator 19 to
A negative pressure is applied to the internal space of each flow path of the main pipe 15 and the branch pipe 11 communicating with each of the detection pipes 12 and 13 from which air is to be taken, and the outside air, that is, the generated gas is passed through each connection port 6. Then, it is sucked into the detection tubes 12 and 13 and air is taken.

This air collection is continued for 1 minute. Then, after 1 minute has elapsed, the air cock 21 is closed and the air collection is completed.

Then, the detection tubes 12 and 13 from which the gas is taken
It is visually confirmed whether there is a discoloration due to a reagent or the like, and depending on the presence or absence of the discoloration, the type of gas such as aromatic hydrocarbons, alcohols, acid gases, etc. at the final judgment stage shown in FIG. It is possible to judge immediately without having to go through a multi-step reaction such as.

After that, the cock of the cylinder 20 is closed, and the used detection tubes 12 and 13 are discarded according to the disposal procedure such as specifications.

As described above, by the multi-component gas sampler 1 according to the first embodiment of the present invention, the multi-component gas sampler 1 can be easily carried and carried in at any place to quickly perform gas determination work. It is possible. In addition, since no electric means is adopted, safety against gas is ensured.

Furthermore, after the gas is specified, a plurality of detector tubes for the gas are attached to the multi-component gas sampler 1, and the gas is sampled again at a plurality of locations where the gas is generated. It is also possible to determine whether the concentration of the specified gas is high or low.

A multi-component gas sampler according to a second embodiment of the present invention is provided with a cylinder 20 in the multi-component gas sampler 1 of the first embodiment and a mounting device for the cylinder in the frame 2. Frame 2
It can also be detachable.

[0044]

As described above, the multi-component gas sampling device according to the present invention has a holding means for holding a plurality of gas detection tubes, and a suction means for sucking outside air by setting the gas detection tubes to a negative pressure. Since the gas detection tube and the suction means are connected via a connecting means capable of simultaneous suction or selective suction, a plurality of kinds of gases can be collected and collected in any detection tube. Therefore, it is possible to make a quick decision, and there is an excellent effect that a high degree of safety can be maintained because there is no electrical component.

The connecting means is provided with a ventilation valve for opening and closing the flow path in each of the branch pipes, and a stop valve for opening and closing the flow path in the main pipe.
It has an excellent effect that the detector tube for taking air can be arbitrarily selected and the leakage of the flow path can be checked.

Since the connecting means is provided with a suction pressure equalizing means for equalizing the suction pressure of the gas in the gas detecting tubes, even if the gas detecting tubes are arbitrarily selected, they are uniform in each detecting tube. It has an excellent effect that gas can be taken at one time with various suction pressures.

Since the holding means, the suction means, and the communication means are equipped in one frame, and the frame is provided with a large-sized gripping member so that the frame can be carried, it is possible to place it in any place even in an emergency. It is possible to carry in the component gas collector,
Moreover, there is an excellent effect that the gas can be promptly judged in the gas generation field.

[Brief description of drawings]

FIG. 1 is a partial perspective view of a multi-component gas sampler according to a first embodiment of the present invention.

FIG. 2 is a front view of the multi-component gas sampler according to the first embodiment of the present invention.

FIG. 3 is a plan view of the multi-component gas sampler according to the first embodiment of the present invention.

FIG. 4 is a side view of the multi-component gas sampler according to the first embodiment of the present invention.

FIG. 5 is an exploded perspective view of a connection port in the multi-component gas sampler according to the first embodiment of the present invention.

FIG. 6 is a schematic block diagram of a multi-component gas sampler according to the first embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a suction action and its flow in the multi-component gas sampler according to the first embodiment of the present invention.

FIG. 8 is a multi-step reaction route map in a conventional example.

[Explanation of symbols]

 1 multi-component gas collector, 2 frame, 3 holding through hole, 4 holding plate, 4a 2 connecting pipe holding plate, 5, 5a valve block, 6 detection pipe connecting port, 6a inlet nut, 6b inlet rubber, 6c packing , 7 guard plate, 8 resistance pipe, 9 filter pipe, 10 ventilation valve, 11 branch pipe, 12, 13 detection pipe, 14 suction block, 15 main pipe, 16 stop valve, 17 vacuum gauge, 18 suction means, 18a suction passage , 19 vacuum generator, 20 cylinder, 21 air cock, 22 flow rate adjusting valve, 23 compressed air connection port, 24 large gripping member, 25 hook.

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[Procedure amendment]

[Submission date] March 13, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006] Also, the gas may be sampled , for example, by glass injection.
It is possible to analyze gas by injecting gas into the cylinder with an injector , syringe, etc. , and injecting gas into the gas analyzer from the inside of the cylinder, but usually, the gas analyzer is a complicated large-scale device. It is located in a fixed place such as a factory or research institute, and cannot be carried anywhere. Therefore, there is a problem that it is not possible to make a quick determination at an arbitrary gas generation place.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

As shown in FIG. 5, the connection port 6 for the detector tube is
An inlet <br/> nut 6a having a screw portion for fixing the periphery thereof gripping portion is cylindrical, the end portion of the fitting interpolated tubular into the through hole of the inlet nut 6a is sensing pipe 13 is connected It comprises a rubber inlet rubber 6b and a rubber or plastic packing 6c.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

As for the detection pipe 12 for the double pipe, the reaction pipe and the measurement pipe are connected by a connecting rubber pipe, and the port on the measurement pipe side is connected to the connection port 6.
Is inserted into the inlet rubber 6b, the opening on the side of the reaction tube is inserted into the through hole 3 of the holding plate 4 and penetrated, and the intermediate portion is held by the double pipe holding plate 4a.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0037

[Correction method] Change

[Correction contents]

Then, as shown in FIG. 7, the flow of compressed air from the cylinder 20 causes the vacuum generator 19 to
A negative pressure is applied to the internal space of each flow path of the main pipe 15 and the branch pipe 11 communicating with each of the detection pipes 12 and 13 from which air is to be taken, and the outside air, that is, the gas to be determined passes through each connection port 6. Via the above, the detection tubes 12 and 13 are sucked into each of them and air is taken.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0042

[Correction method] Change

[Correction contents]

Further, after the gas to be judged is specified,
By attaching multiple detection tubes for the gas to the multi-component gas sampler 1 and collecting gas again at multiple locations of the gas generation location, it can be determined at which location the concentration of the specified gas is high or low. It can also be determined.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] Explanation of sign

[Correction method] Change

[Correction contents]

[Explanation of Codes] 1 multi-component gas sampler, 2 frame, 3 holding through hole,
4 holding plate, 4a 2 pipe holding plate, 5, 5a valve block, 6 detection pipe connection port, 6a inlet nut, 6
b Inlet rubber, 6c packing, 7 guard plate,
8 resistance tubes, 9 filter tubes, 10 ventilation valves, 11
Branch pipe, 12, 13 Detection pipe, 14 Suction block, 1
5 main pipe, 16 stop valves, 17 vacuum gauge, 18
Suction means, 18a suction flow path, 19 vacuum generator, 2
0 cylinder, 21 air cock, 22 flow control valve, 2
3 compressed air connection port, 24 large gripping member, 25 hooks.

Claims (7)

[Claims] 1. A holding means for holding a plurality of gas detection tubes, and a suction means for sucking outside air by making the gas detection tubes negative pressure, and the gas detection tube and the suction means are simultaneously sucked. Alternatively, the multi-component gas sampler is characterized in that it is connected through a connecting means capable of selective suction. 2. The connecting means comprises a branch pipe connected to each of a plurality of gas detection pipes, and a main pipe collectively connecting the branch pipes to the suction means. The gas sampler described in. 3. The multi-component gas sampler according to claim 1, wherein the connecting means is provided with a suction pressure equalizing means for equalizing the suction pressure of the gas in the gas detection tube. 4. The connecting means is provided with a ventilation valve that opens and closes the flow path in each of the branch pipes, and a stop valve that opens and closes the flow path in the main pipe. The multi-component gas collector described in. 5. The multi-component gas sampler according to claim 4, wherein a vacuum gauge is provided between the ventilation valve and the stop valve. 6. The holding means, the suction means, and the communication means are mounted on a single frame, and the frame is provided with a large-sized gripping member, which is portable. The described multi-component gas sampler. 7. The multi-component gas sampler according to claim 1, wherein the suction means comprises a removable cylinder, an air cock for opening and closing the flow path, and a flow rate adjusting valve.