Liquid oxygen analysis sampling device

Abstract

A liquid oxygen analyzing and sampling device comprises a connecting pipe communicated with a spray guide opening of a liquid oxygen process pipeline and a sampling bottle with a sealed bottle opening, a sampling pipe communicated with the interior of the sampling bottle is arranged on the sampling bottle, an outlet of the connecting pipe is connected with an inlet of the sampling pipe, and a sample injection pipe communicated with the interior of the sampling bottle is further arranged on the sampling bottle. And a first manual control valve and a second manual control valve are respectively arranged on the sampling pipe and the sample injection pipe. During sampling, the first manual control valve on the sampling tube and the second manual valve on the sample injection tube are opened, the first manual valve and the second manual valve are sequentially closed after a sample fully replaces the sampling bottle, the sample does not make contact with external air in the sampling process of the sampling bottle, the external air is prevented from polluting the sample in the bottle, and the accuracy of subsequent data analysis is guaranteed.

Description

Technical Field

[0001] The utility model relates to liquid oxygen detection equipment, in particular to a liquid oxygen analysis sampling device. Background Art

[0002] Liquid oxygen (LOX) is oxygen in its liquid form and has a wide range of industrial and medical applications. Cryogenic air separation (ASU) is the primary method for producing industrial and medical oxygen. During the production process, ASUs require strict monitoring of the hydrocarbon and acetylene content in LOX, particularly acetylene. Excessive acetylene levels can cause explosions. Therefore, measuring the levels of hydrocarbons and acetylene in LOX is crucial.

[0003] In the existing technology, liquid oxygen is quantitatively sampled using a liquid oxygen sampler. After vaporizing at room temperature, the liquid oxygen enters a gas chromatograph for chromatographic analysis, thereby analyzing the content of substances such as hydrocarbons and acetylene. A variety of liquid oxygen samplers are currently available on the market, but they are relatively expensive. To save production costs, most companies choose to use distillation flasks as liquid oxygen sampling tools. For example, the authorized patent "A System for Detecting Acetylene Content in Liquid Oxygen" (Document No. CN211014149U) also mentions the use of distillation flasks for sampling. However, when using distillation flasks to sample liquid oxygen, the sample is easily exposed to the outside air during the sampling process, which can contaminate the sample and further affect subsequent testing. Summary of the Invention

[0004] The utility model provides a liquid oxygen analysis sampling device, which is simple to manufacture and easy to operate. During the sampling process, the sample does not come into contact with the outside air, thereby ensuring the accuracy of data analysis.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted is: a liquid oxygen analysis sampling device, a connecting pipe connected to the inlet A of the liquid oxygen process pipeline A and a sampling bottle with a sealed bottle mouth, the sampling bottle is provided with a sampling tube connected to its interior, the outlet of the connecting pipe is connected to the inlet of the sampling tube, the sampling bottle is also provided with a sampling tube connected to its interior, and the sampling tube and the sampling tube are respectively provided with a first manual control valve and a second manual control valve.

[0006] Preferably, the sampling bottle includes a bottle cap and a bottle body, the sampling tube is passed downward from the bottle cap to the inner bottom of the bottle body and is arranged at a distance from the bottle bottom, the tube section of the sampling tube located in the internal space of the bottle cap is connected to a baffle with an opening on the plate surface, the plate surface of the baffle is arranged parallel to the surface where the opening of the bottle cap is located, and the sampling tube is connected to the chamber formed by the upper plate surface of the baffle and the inner wall surface of the bottle cap.

[0007] Preferably, a collar is connected to the tube section of the sampling tube located in the inner space of the bottle body, and the collars are arranged at intervals along the tube core direction of the sampling tube.

[0008] Preferably, support portions are arranged at intervals along the direction of the tube core on the tube section of the sampling tube located in the internal space of the bottle body. The support portions protrude outward along the radial direction of the sampling tube body and support the lower end surface of the collar. The sampling tube is inserted into the through hole in the middle of the collar and forms a movable connection with the collar.

[0009] Preferably, the opening of the bottle cap and the bottle mouth of the bottle body are provided with nuts and threads that match each other and form a detachable fit.

[0010] Preferably, the pipe body of the connecting pipe is provided with a vent branch pipe connected to the interior thereof, and the pipe body of the vent branch pipe is provided with a third manual control valve.

[0011] Preferably, a pressure gauge for monitoring the internal pressure of the connecting pipe is provided on the connecting pipe.

[0012] Compared with the prior art, the technical effect of the utility model is as follows: the sampling tube on the sampling bottle is connected to the liquid oxygen process pipeline by using a connecting tube; when sampling, the first manual control valve on the sampling tube and the second manual valve on the sampling tube are opened; after the sample fully replaces the sampling bottle, the first and second manual valves are closed in sequence; during the sampling process of the sampling bottle, the sample does not come into contact with the outside air, thereby preventing the outside air from contaminating the sample in the bottle and ensuring the accuracy of subsequent data analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the sampling bottle of the present utility model;

[0015] Figure 3 Schematic diagram of the ring sliding up. DETAILED DESCRIPTION

[0016] The following will be combined with the Figure 1 —3 A detailed description of the embodiments of the technical solution of this application is given below:

[0017] A liquid oxygen analysis sampling device includes a connecting tube 10 connected to a spray port A1 of a liquid oxygen process pipeline A and a sampling bottle 20 with a sealed bottle mouth. The sampling bottle 20 is provided with a sampling tube 30 connected to the interior thereof. The outlet of the connecting tube 10 is connected to the inlet of the sampling tube 30. The sampling bottle 20 is also provided with a sampling injection tube 40 connected to the interior thereof. The sampling tube 30 and the sampling injection tube 40 are respectively provided with a first manual control valve 31 and a second manual control valve 41.

[0018] In the above scheme, a connecting tube 10 is used to connect the sampling tube 30 on the sampling bottle 20 to the liquid oxygen process pipeline A. During sampling, the first manual control valve 31 on the sampling tube 30 and the second manual valve 41 on the sampling tube 40 are opened. After the sample has fully displaced the sampling bottle 20, the first and second manual valves 31 and 41 are closed in sequence. During the sampling process of the sampling bottle 20, the sample is not exposed to the outside air, preventing outside air from contaminating the sample in the bottle and ensuring the accuracy of subsequent data analysis. When liquid oxygen needs to be passed into a gas chromatograph for analysis, the outlet of the sampling tube 40 is connected to the gas inlet of the gas chromatograph. By controlling the opening and closing of the second manual control valve 41, the vaporized liquid oxygen can be controlled to flow naturally into the gas chromatograph for analysis.

[0019] like Figure 1 and Figure 2 As shown, the sampling bottle 20 includes a bottle cap 21 and a bottle body 22. The sampling tube 30 is inserted downward from the bottle cap 21 to the inner bottom of the bottle body 22 and is spaced apart from the bottle bottom. The tube section of the sampling tube 30 located in the internal space of the bottle cap 21 is connected to a baffle 32 having an opening on the plate surface. The plate surface of the baffle 32 is arranged parallel to the surface where the opening of the bottle cap 21 is located. The sampling tube 40 is connected to the chamber formed by the upper plate surface of the baffle 32 and the inner wall surface of the bottle cap 21. The chamber formed by the upper plate surface of the baffle 32 and the inner wall surface of the bottle cap 21 constitutes a vaporization chamber. The vaporized liquid oxygen enters the vaporization chamber from the bottom of the sampling bottle 20 and further enters the sampling tube 40. By controlling the second manual control valve 41 on the sampling tube 40, the vaporized liquid oxygen can be passed into the gas chromatograph for sample cost detection.

[0020] As a preferred solution, a collar 33 is connected to the tube section of the sampling tube 30 located in the inner space of the bottle body 22 , and the collars 33 are arranged at intervals along the tube core direction of the sampling tube 30 .

[0021] Further, combined with Figure 2 、 3 As shown, the sampling tube 30 has support portions 34 arranged at intervals along the tube core direction on the tube section located in the internal space of the bottle body 22. The support portions 34 protrude outward in the radial direction of the tube body of the sampling tube 30 and support the lower end surface of the collar 33. The sampling tube 30 is inserted into the through hole in the middle of the collar 33 and forms a movable connection with the collar 33. Figure 2 The collar 33 is shown in the lower position. Figure 3The display shows the collar 33 in the upper position. Before the sample enters the gas chromatograph for analysis, by shaking the sampling bottle 20 up and down, the collar 33 can move up and down relative to the sampling tube 30 due to inertia, thereby mixing the sample in the bottle and preventing stratification of the sample inside the bottle, which would affect the accuracy of the analytical data. The support portion 34 serves to limit the distance the collar 33 falls on the sampling tube 30, preventing the collar 33 from completely separating from the tube body of the sampling tube 30. In this embodiment, a handle 23 can be provided on the outer wall of the bottle body 22 to facilitate holding and operating the sampling bottle 20.

[0022] Combine Figure 1 As shown, to facilitate maintenance of the internal structure of the sampling bottle 20, the opening of the bottle cap 21 and the mouth of the bottle body 22 are equipped with a mating nut 211 and thread 221, respectively, forming a removable fit, allowing for easy disassembly and assembly of the bottle cap 21 and the bottle body 22. The liquid oxygen process line A and the connecting tube 10 can also be disassembled or assembled in the same manner. The outlet of the connecting tube 10 can be provided with a compression fitting 13 for connecting to the sampling tube 30 on the sampling bottle 20.

[0023] Combine Figure 1 As shown, the connecting pipe 10 is provided with a vent branch 11 connected to the interior thereof, and the vent branch 11 is provided with a third manual control valve 111. In this solution, opening the third manual control valve 111 on the vent branch 11 can replace the process pipeline and discharge the gaseous medium therein.

[0024] The connecting pipe 10 is provided with a pressure gauge 12 for monitoring the internal pressure thereof, and the sampling pressure can be adjusted to a suitable range.

Claims

1. A liquid oxygen analysis sampling device, characterized in that: A connecting pipe (10) connected to the inlet (A1) of the liquid oxygen process pipeline (A) and a sampling bottle (20) with a sealed bottle mouth are provided on the sampling bottle (20), a sampling tube (30) connected to the interior thereof is provided, the outlet of the connecting pipe (10) is connected to the inlet of the sampling tube (30), and the sampling bottle (20) is further provided with a sampling injection tube (40) connected to the interior thereof, and a first manual control valve (31) and a second manual control valve (41) are provided on the sampling tube (30) and the sampling injection tube (40), respectively.

2. A liquid oxygen analysis sampling device according to claim 1, characterized in that: The sampling bottle (20) includes a bottle cap (21) and a bottle body (22). The sampling tube (30) is inserted downward from the bottle cap (21) to the inner bottom of the bottle body (22) and is arranged at a distance from the bottle bottom. The tube section of the sampling tube (30) located in the internal space of the bottle cap (21) is connected to a baffle (32) having an opening on the plate surface. The plate surface of the baffle (32) is arranged parallel to the surface where the opening of the bottle cap (21) is located. The sampling tube (40) is connected to a chamber formed by the upper plate surface of the baffle (32) and the inner wall surface of the bottle cap (21).

3. A liquid oxygen analysis sampling device according to claim 2, characterized in that: A collar (33) is connected to the tube section of the sampling tube (30) located in the internal space of the bottle body (22), and the collars (33) are arranged at intervals along the tube core direction of the sampling tube (30).

4. A liquid oxygen analysis sampling device according to claim 3, characterized in that: Supporting portions (34) are arranged at intervals along the tube core direction on the tube section of the sampling tube (30) located in the internal space of the bottle body (22). The supporting portions (34) protrude outward along the radial direction of the tube body of the sampling tube (30) and support the lower end surface of the collar (33). The sampling tube (30) is inserted into the through hole in the middle of the collar (33) and forms a movable connection with the collar (33).

5. The liquid oxygen analysis sampling device according to claim 2, characterized in that: The opening of the bottle cap (21) and the bottle mouth of the bottle body (22) are respectively provided with a nut (211) and a thread (221) that cooperate with each other and form a detachable fit.

6. The liquid oxygen analysis sampling device according to claim 1, characterized in that: The connecting pipe (10) is provided with a vent branch pipe (11) in communication with the interior thereof on its body, and a third manual control valve (111) is provided on the vent branch pipe (11).

7. The liquid oxygen analysis sampling device according to claim 1, characterized in that: The connecting pipe (10) is provided with a pressure gauge (12) for monitoring the internal pressure thereof.

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