Sampling device for liquid easy to naturally volatilize in air

Abstract

The sampling device is mainly applied to conversion of flammable and volatile liquid between equipment. A pipeline system is in a closed design and is connected with a metal pipeline through various valves, inert gas enters the pipeline system, the pipeline system is purified and then is output out of the system, one-time circulation is completed, the circulation is continuously carried out, water and oxygen in the pipeline can be effectively removed, and the pipeline system is always kept in a protection environment of the high-purity inert gas. Therefore, liquid easy to spontaneously volatilize and the like can be safely taken in an aerobic environment of a common laboratory.

Description

Technical Field

[0001] This application belongs to the field of pipeline connection design, specifically relating to a pipeline connection structure and its assembly method. Background Technology

[0002] In general chemical laboratories, it is unavoidable to use hazardous chemical reagents that are easily volatile in the air, such as triethylaluminum. These liquids are extremely prone to spontaneous combustion and explosion when exposed to air, which can lead to extremely serious safety accidents. Therefore, the handling of such hazardous and flammable liquid chemical reagents that can undergo violent chemical reactions when exposed to oxygen in the air should be taken seriously.

[0003] Currently, there are no tools specifically designed for handling such extremely dangerous chemical reagents. The crude and primitive methods used in laboratories to handle these liquids pose significant safety hazards. During the handling process, issues such as the inability to completely isolate the liquid from air can lead to spontaneous combustion upon contact with oxygen in the air, causing accidents. Summary of the Invention

[0004] The present invention aims to provide a sampling device for easily spontaneously disseminated liquids in the air, so as to solve the technical problem that existing laboratory technologies cannot collect flammable and volatile liquids.

[0005] The technical solution adopted in this patent is to use multiple ball valves in coordination to transfer flammable and volatile liquids between containers, allowing them to be used in other containers while maintaining their activity.

[0006] The overall structure of this pipeline is I-shaped, with all pipes being 1 / 4 inch in diameter. The pipe materials are 304 stainless steel, titanium alloy (Ti), and Hastelloy (HC). It mainly consists of two pipes, upper and lower, connected by a 1 / 4-inch two-way ball valve using a metal compression fitting.

[0007] This patent has the following advantages: 1. It enables sampling and transfer of liquids that are flammable in air in non-vacuum environments, improving the safety and flexibility of the operation.

[0008] 2. The overall structure is simple and easy to carry. It can also be adapted to various sampling containers by changing the interface, which enhances the versatility of the device.

[0009] 3. The use of a compression fitting connection reduces equipment maintenance costs, making it particularly suitable for laboratory environments. Detailed Implementation

[0010] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0011] likeFigure 1 As shown, this patent describes a sampling device for easily volatile liquids in the air, which includes material inlet and outlet pipes and valves.

[0012] The operating procedure for this pipeline device is as follows: Step 1: Purge the pipeline First, open all valves, then turn on nitrogen switch ① to purge the entire pipeline. After purging, close ball valves ⑦, ⑨, ⑭, and ② in sequence, then turn off the nitrogen to pressurize the pipeline.

[0013] Then open ball valve ⑨ to release the pressure and then close ball valve ⑨. Then open nitrogen gas again to pressurize the pipeline. Repeat the above operation several times to complete the pipeline purging operation.

[0014] Step 2: Vacuuming operation Turn on the vacuum pump at port 6 to evacuate the pipeline. After evacuation, close ball valve 8 first, then turn off the vacuum pump. At this time, the lower half of the pipeline is under negative pressure.

[0015] Step 3: Sampling and Injection Open the valve of sampling container ⑩ and use the pressure difference to draw the liquid in the sampling container into the pipeline. Then close the valve of sampling container ⑩. Next, connect nitrogen gas under pressure from the upper port of ball valve ⑨, and then open ball valve ⑨ to allow the liquid to be injected into the collection containers through ⑪, ⑫, ⑬, ⑭, and ⑮ under pressure.

[0016] After confirming that all residual liquid in the pipeline has been injected into the collection container, close ball valve 14, open ball valve 9 to release pressure to the air from the top until atmospheric pressure is reached, then close it. Next, open ball valve 8 to restore the flow between the upper and lower parts of the pipeline. At this time, the opening and closing status of the valves in the pipeline should be consistent with that before step two. Then, repeat steps two and three in sequence until sufficient liquid is obtained.

[0017] Step 4: Residual Liquid Treatment First, open the valve of sampling container ⑩, then open the valve of nitrogen cylinder ①. Use nitrogen pressure to force the small amount of liquid remaining in pipelines ⑩ and ⑪ back into the original containers. After that, close the valves of sampling container ⑩ and collection container ⑮. At this point, the liquid in the pipelines has been mostly purged, and the devices connected to ⑥, ⑩, and ⑮ can be removed for transfer.

[0018] Step 5: Blow again in preparation for next use Open all valves, open nitrogen valve ① to purge the entire pipeline, then turn off the nitrogen, remove the nitrogen cylinder, and store the pipeline for future use.

[0019] By using the above operating methods, it is possible to safely sample flammable and volatile liquids, thereby achieving the experimental objective. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the sampling device. The components are labeled as follows: 1. This interface connects to the outlet of the inert gas cylinder (the inert gas used in this pipeline is nitrogen; the specific inert gas used may vary depending on the properties of the liquid being sampled); 2. Ball valve; 3. Three-way valve; 4. Ball valve; 5. Three-way valve; 6. This interface connects to the vacuum pump; 7. Ball valve; 8. Ball valve; 9. Ball valve; 10. This interface connects to the container to be sampled; 11. Three-way valve; 12. Ball valve; 13. Three-way valve; 14. Ball valve; 15. This interface connects to the liquid collection container.

Claims

1. A sampling device for easily spontaneously disseminated liquids in the air, capable of taking and transferring flammable and volatile liquids in a normal laboratory environment while ensuring that the material does not lose its activity, the device comprising two main components: material inlet and outlet pipelines and valves.

2. The material inlet / outlet pipeline according to claim 1, characterized in that: The overall structure of this pipeline is I-shaped, with all pipes being 1 / 4 inch in diameter. The pipe materials are 304 stainless steel, titanium alloy (Ti), and Hastelloy (HC). It mainly consists of two pipes, upper and lower, connected by a 1 / 4-inch two-way ball valve using a metal compression fitting.

3. The valve according to claim 1, characterized in that: The valves are 1 / 4-inch two-way ball valves and 1 / 4-inch three-way ball valves.

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