Gas detection system and suction type sampling device

Abstract

A gas detection system is applicable to detect gas within a sample. The gas detection system includes a suction type sampling device and a gas detection device. The suction type sampling device is applicable to sample the sample, and comprises a sampling tube and a sampling unit. The sampling tube comprises a main tube body and an output side tube. The main tube body defines an accommodation space. The output side tube is connected to the accommodation space. The sampling unit is set on the main tube body, which is applicable to suck the sample into the accommodation space. The gas detection device is connected to the output side tube, which is applicable to detect the gas in the sample.

Description

[Technical Field]

[0001] This invention relates to a detection system, and more particularly to a gas detection system and an aspiration sampling device. [Previous Technology]

[0002] Existing gas detection systems require sampling of a sample, typically wastewater generated after processing animal excrement. Current sampling methods involve directly scooping up the sample using a graduated measuring cup or beaker, sealing it, and then bringing it back to the laboratory for gas detection. However, this method involves direct contact between the sampling personnel and the sample, potentially causing adverse effects. Therefore, there is room for improvement. [Summary of the Invention]

[0003] Therefore, one object of the present invention is to provide a gas detection system that can solve at least one of the above-mentioned problems.

[0004] Therefore, another object of the present invention is to provide an absorption sampling device for the aforementioned gas detection system.

[0005] The gas detection system of the present invention is applicable to detecting gas in a sample. The gas detection system includes an aspiration sampling device for sampling the sample, and includes a sampling cylinder, including a main cylinder and an output side pipe formed in the main cylinder. The main cylinder defines a receiving space, and the output side pipe can communicate with the receiving space. A sampling unit is disposed in the main cylinder and is applicable to aspirating the sample into the receiving space. A gas detection device is connected to the output side pipe and is applicable to detecting gas in the sample.

[0006] In some embodiments, the main cylinder has a suction end and a venting end opposite to the suction end. The suction end forms a suction port. The sampling unit also includes a movable rod movably disposed on the main cylinder and a piston connected to the end of the movable rod. The piston is pressed against the inner wall surface of the main cylinder to divide the accommodating space into a lower part and an upper part that are not connected to each other.

[0007] In some embodiments, the sampling unit further includes a reaction reagent located at the lower part for reacting with the nitrogen-containing substance of the sample to convert the nitrogen-containing substance into a nitrogen-containing gas.

[0008] In some embodiments, the sampling tube also includes an input side pipe formed in the main tube body, the input side pipe and the output side pipe being adjacent to the vent end and located on the same straight line.

[0009] In some embodiments, the sampling tube also includes a cap that can be detachably closed to the suction port.

[0010] In some embodiments, the sampling unit includes a sampling test paper disposed in the sampling tube in the accommodating space and a reaction reagent disposed in the sampling test paper. The sampling test paper is suitable for absorbing the sample to be sampled, and the reaction reagent is used to react with the nitrogen-containing substance of the sample to convert the nitrogen-containing substance into a nitrogen-containing gas.

[0011] In some embodiments, the sampling tube also includes an input side tube formed in the main tube body, the input side tube and the output side tube being located on the same straight line.

[0012] The suction sampling device of the present invention is suitable for sampling a sample to be sampled. The suction sampling device includes a sampling cylinder, including a main cylinder and an output side tube formed in the main cylinder. The main cylinder defines a receiving space and the output side tube can communicate with the receiving space; and a sampling unit is disposed in the main cylinder and is suitable for sucking the sample to be sampled into the receiving space.

[0013] In some embodiments, the main cylinder has a suction end and a venting end opposite to the suction end. The suction end forms a suction port. The sampling unit also includes a movable rod movably disposed on the main cylinder and a piston connected to the end of the movable rod. The piston is pressed against the inner wall surface of the main cylinder to divide the accommodating space into a lower part and an upper part that are not connected to each other.

[0014] In some embodiments, the sampling unit further includes a reaction reagent located at the lower part for reacting with the nitrogen-containing substance of the sample to convert the nitrogen-containing substance into a nitrogen-containing gas.

[0015] In some embodiments, the sampling tube also includes an input side pipe formed in the main tube body, the input side pipe and the output side pipe being adjacent to the vent end and located on the same straight line.

[0016] In some embodiments, the sampling tube also includes a cap that can be detachably closed to the suction port.

[0017] In some embodiments, the sampling unit includes a sampling test paper disposed in the sampling tube in the accommodating space and a reaction reagent disposed in the sampling test paper. The sampling test paper is suitable for absorbing the sample to be sampled, and the reaction reagent is used to react with the nitrogen-containing substance of the sample to convert the nitrogen-containing substance into a nitrogen-containing gas.

[0018] In some embodiments, the sampling tube also includes an input side tube formed in the main tube body, the input side tube and the output side tube being located on the same straight line.

[0019] The present invention has at least the following advantages: when the sample is directly sampled by the suction sampling device, the sampler can sample without contacting the water body, thereby reducing the adverse effects of the water body on the sampler. Moreover, the present invention has a simple structure and is very simple and convenient to use.

Implementation Method

[0020] Before the present invention is described in detail, it should be noted that similar elements are represented by the same numbers in the following description.

[0021] Referring to Figures 1 and 2, a first embodiment of the gas detection system 100 of the present invention is suitable for detecting gas in a sample S, such as wastewater generated after treating animal excrement. The gas detection system 100 includes a suction sampling device 10 and a gas detection device 3.

[0022] The suction sampling device 10 includes a sampling cylinder 1 and a sampling unit 2. The sampling cylinder 1 includes a main cylinder 11, an output side pipe 12 formed in the main cylinder 11, an input side pipe 13 formed in the main cylinder 11, and a cap 14. The main cylinder 11 has a suction end 111 and a venting end 112 opposite to the suction end 111, and the suction end 111 forms a suction port 113. The main cylinder 11 defines a receiving space 114, and the input side pipe 13 and the output side pipe 12 are both adjacent to the venting end 112 and located on the same straight line, and both communicate with the receiving space 114. The cap 14 detachably closes the suction port 113. The input side pipe 13 can be connected to an external pump (not shown), which can blow air into the lower part 114a through the input side pipe 13, helping to drive the ammonia gas to flow more efficiently to the gas detection device 3. However, in other embodiments, the input side pipe 13 can be omitted, and it is not limited to the form of this embodiment.

[0023] The sampling unit 2 is disposed in the main cylinder 11 and is suitable for drawing the sample S into the accommodating space 114. The sampling unit 2 includes a movable rod 21 movably disposed in the main cylinder 11, a piston 22 connected to the end of the movable rod 21, and a reaction reagent 23 located in the accommodating space 114. The piston 22 is pressed against the inner wall of the main cylinder 11 to divide the accommodating space 114 into a lower part 114a and an upper part 114b that are not connected to each other. Specifically, the aspiration sampling device 10 is similar to a syringe structure. The reaction reagent 23 (e.g., sodium hydroxide) is located in the lower part 114a and is used to react with the nitrogen-containing substance (e.g., ammonia nitrogen) of the sample S to convert the nitrogen-containing substance into a nitrogen-containing gas (e.g., ammonia gas). The gas detection device 3 is connected to the output side pipe 12 and is suitable for detecting the concentration of gas, such as ammonia, in the sample S. The gas detection device 3 can be, for example, a portable, small, and simple detection device.

[0024] Referring to Figures 1 and 2, the usage of the first embodiment is described below: First, the user inserts the suction port 113 of the main cylinder 11 into the sample S to be sampled, and then pulls the movable rod 21 upward to draw the sample S to the lower part 114a of the accommodating space 114, as shown in Figure 1. After sampling, the cap 14 can be used to close the suction port 113 (see Figure 2). At this time, the reaction reagent 23 can react with the nitrogen-containing substance (e.g., ammonia nitrogen) of the sample S to convert the nitrogen-containing substance into a nitrogen-containing gas (e.g., ammonia gas), so that the lower part 114a is filled with ammonia gas. Referring to Figure 2, the user continues to pull the movable rod 21 upwards, making the distance between the piston 22 and the vent 112 less than the distance between the output pipe 12 and the input pipe 13 and the vent 112. The lower part 114a then connects to the output pipe 12 and the input pipe 13, allowing the ammonia gas in the lower part 114a to flow to the gas detection device 3. The gas detection device 3 can then detect the ammonia gas and determine its concentration. It is quite simple and convenient to use. Specifically, the gas detection system 100 can control the flow rate and volume of gas into the gas detection device 3 via the pump (not shown) through the input pipe 13 and a flow meter, and uses a built-in sodium hydroxide tube to reduce the humidity of the incoming gas. The gas detection device 3 is a p-type resistive sensor. When ammonia gas comes into contact with the gas detection device 3, the lone pairs of electrons in the ammonia gas confine the holes on the gas detection device 3, causing the resistance of the gas detection device 3 to increase and the current to decrease. The magnitude of this current decrease is used as the gas sensing response to calculate the concentration of ammonia gas. By using this absorption sampling device 10 to directly sample the sample S, the sampling personnel can sample without contacting the water body, thus reducing the adverse effects of the water body on the sampling personnel. Moreover, the main cylinder 11 can have a scale, so the sample S can be directly and quantitatively sampled, enabling quantitative analysis in subsequent measurements.

[0025] Referring to Figures 3 and 4, the following is the experimental procedure and results. First, four concentrations of ammonium sulfate standard solutions were prepared as the sample S, diluted from 1000 mg / L to 3 mg / L, 5 mg / L, 10 mg / L, and 20 mg / L, respectively. Next, approximately 0.22 g of NaOH in the main cylinder 11 was crushed into powder. The volume of the main cylinder 11 is approximately 300 mL. 50 mL of solution was drawn each time, the gas flow rate was 500 mL / min, and the sensing time for each measurement was 30 s. The main cylinder 11 was cleaned and refilled with NaOH powder before each measurement. Figure 3 shows the ammonia concentration obtained after sampling and detection of the four concentrations of ammonium sulfate standard solutions through the aspiration sampling device 10. Figure 4 shows the relationship between sensing time and current after detection of the four concentrations of ammonium sulfate standard solutions.

[0026] Referring to FIG5, a second embodiment of the gas detection system 100' of the present invention is also applicable to detecting gas in a sample S, which may be, for example, wastewater generated after treating animal excrement. The gas detection system 100' includes an aspiration sampling device 10' and a gas detection device 3.

[0027] The aspiration sampling device 10' includes a sampling tube 1' and a sampling unit 2'. The sampling tube 1' includes a main body 11', an output side tube 12' formed in the main body 11', and an input side tube 13' formed in the main body 11'. The main body 11' has a downward opening and defines a receiving space 114'. The input side tube 13' and the output side tube 12' are both located at the ends opposite to the opening and are on the same straight line, and both are connected to the receiving space 114'. The sampling unit 2' includes a sampling test strip 24 disposed in the sampling tube 1' located in the receiving space 114' and a reaction reagent 23' disposed in the sampling test strip 24. The sampling test strip 24 can be attached to the inner wall of the main cylinder 11' by adhesive, and is suitable for absorbing the sample S. The reaction reagent 23 is used to react with the nitrogen-containing substance (e.g., ammonia nitrogen) of the sample S to convert the nitrogen-containing substance into a nitrogen-containing gas (e.g., ammonia gas).

[0028] The second embodiment is used in a similar manner to the first embodiment. First, the opening of the main cylinder 11' of the sampling tube 1' of the absorption sampling device 10' faces the sample to be sampled S. Then, the absorption sampling device 10' is inserted into the sample to be sampled S so that the sampling test paper 24 comes into contact with the sample to be sampled S. The sampling test paper 24 can then absorb the sample to be sampled S through capillary action. At this time, the reaction reagent 23' can react with the nitrogen-containing substance (e.g., ammonia nitrogen) of the sample to be sampled S to convert the nitrogen-containing substance into a nitrogen-containing gas (e.g., ammonia gas), filling the containment space 114' with ammonia gas. This ammonia gas will flow to the gas detection device 3, which can then detect the ammonia gas and determine its concentration. It is quite simple and convenient to use. The input side pipe 13' can also be connected to an external pump (not shown). This pump can blow air into the accommodating space 114' through the input side pipe 13', which helps to drive the ammonia gas to flow more efficiently to the gas detection device 3. However, in other embodiments, the input side pipe 13' can be omitted, and it is not limited to the form of this embodiment. It should be noted that this second embodiment can be installed on a drone (not shown), so that the user can operate the drone to sample the object S, which can further reduce the adverse effects of water on the sampling personnel.

[0029] In summary, when the gas detection systems 100 and 100' of the present invention directly sample the object S to be sampled by using the absorption sampling devices 10 and 10', the sampling personnel can sample without contacting the water body, thereby reducing the adverse effects of the water body on the sampling personnel. Moreover, the structure of the present invention is simple and easy to use, so it can indeed achieve the purpose of the present invention.

[0030] However, the above description is only an embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the patent specification shall still fall within the scope of the patent of the present invention. [Simplified Explanation of the Diagram]

[0031] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: Figure 1 is a schematic diagram of a first embodiment of the gas detection system of the present invention; Figure 2 is a schematic diagram of the first embodiment illustrating its usage; Figure 3 is a graph showing the relationship between ammonia concentration and ammonia ion concentration obtained after sampling and detecting four concentrations of ammonium sulfate standard solutions through the absorption sampling device; Figure 4 is a graph showing the relationship between current and sensing time obtained after sampling and detecting four concentrations of ammonium sulfate standard solutions through the absorption sampling device; and Figure 5 is a schematic diagram of a second embodiment of the gas detection system of the present invention.

Claims

1. A gas detection system suitable for detecting gas in a sample, the gas detection system comprising: a suction sampling device suitable for sampling the sample, including a sampling cylinder comprising a main cylinder body and an output side pipe formed in the main cylinder body, the main cylinder body defining a receiving space, the output side pipe communicating with the receiving space, and a sampling unit disposed in the main cylinder body, suitable for suctioning the sample into the receiving space; and a gas detection device connected to the output side pipe, suitable for detecting gas in the sample; wherein... The main cylinder has an intake end and an exhaust end opposite to the intake end. The sampling cylinder also includes an input side pipe formed in the main cylinder. The input side pipe and the output side pipe are both adjacent to the exhaust end and located on the same straight line.

2. The gas detection system as described in claim 1, wherein, The suction end forms a suction port. The sampling unit includes a movable rod movably disposed on the main cylinder and a piston connected to the end of the movable rod. The piston is pressed against the inner wall surface of the main cylinder to divide the accommodating space into a lower part and an upper part that are not connected to each other.

3. The gas detection system as described in claim 2, wherein, The sampling unit also includes a reaction reagent located at the bottom, which reacts with the nitrogen-containing substance of the sample to convert the nitrogen-containing substance into a nitrogen-containing gas.

4. The gas detection system as described in claim 2, wherein, The sampling tube also includes a removable cap that closes the suction port.

5. The gas detection system as claimed in claim 1, wherein, The sampling unit includes a sampling test paper disposed in the sampling tube within the accommodating space and a reaction reagent disposed in the sampling test paper. The sampling test paper is suitable for absorbing the sample to be sampled, and the reaction reagent is used to react with the nitrogen-containing substance of the sample to convert the nitrogen-containing substance into a nitrogen-containing gas.

6. The gas detection system as claimed in claim 5, wherein, The sampling tube also includes an input side tube formed in the main tube body, and the input side tube and the output side tube are located on the same straight line.

7. A suction-type sampling device suitable for sampling an object to be sampled, the suction-type sampling device comprising: a sampling cylinder including a main cylinder body and an output side tube formed in the main cylinder body, the main cylinder body defining a receiving space, the output side tube communicating with the receiving space; and a sampling unit disposed in the main cylinder body, suitable for suctioning the object to be sampled into the receiving space; wherein... The main cylinder has an intake end and an exhaust end opposite to the intake end. The sampling cylinder also includes an input side pipe formed in the main cylinder. The input side pipe and the output side pipe are both adjacent to the exhaust end and located on the same straight line.

8. The absorption sampling device as described in claim 7, wherein, The suction end forms a suction port. The sampling unit also includes a movable rod movably disposed on the main cylinder and a piston connected to the end of the movable rod. The piston is pressed against the inner wall surface of the main cylinder to divide the accommodating space into a lower part and an upper part that are not connected to each other.

9. The absorption sampling device as described in claim 8, wherein, The sampling unit also includes a reaction reagent located at the bottom, which reacts with the nitrogen-containing substance of the sample to convert the nitrogen-containing substance into a nitrogen-containing gas.

10. The aspiration sampling device as described in claim 8, wherein, The sampling tube also includes a removable cap that closes the suction port.

11. The aspiration sampling device as described in claim 7, wherein, The sampling unit includes a sampling test paper disposed in the sampling tube within the accommodating space and a reaction reagent disposed in the sampling test paper. The sampling test paper is suitable for absorbing the sample to be sampled, and the reaction reagent is used to react with the nitrogen-containing substance of the sample to convert the nitrogen-containing substance into a nitrogen-containing gas.

12. The aspiration sampling device as described in claim 111, wherein, The sampling tube also includes an input side tube formed in the main tube body, and the input side tube and the output side tube are located on the same straight line.

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