A sealed sampling mechanism

Abstract

The utility model relates to chemical sampling technical field discloses a kind of sealing sampling mechanism, including sampling device, nitrogen charging device and connecting device, the sampling device includes sampling bottle, sampling bottle outer wall upper end thread sleeve connection has sampling cover, the upper end surface middle part of the sampling cover is fixedly connected with sealed feed pipe, the nitrogen charging device includes nitrogen pipe, the nitrogen pipe outer wall lower end other side is fixedly connected with nitrogen gas inlet pipe, the nitrogen pipe outer wall upper end one side is fixedly connected with nitrogen gas outlet pipe, the connecting device includes sampling tube and two connecting pipes, sampling tube periphery is fixedly provided with sampling control valve, the upper and lower ends of the nitrogen pipe are all connected with the upper end of sealed feed pipe and the lower end of sampling tube through connecting pipe and thread sleeve connection. In the utility model, the device can avoid the nitrogen charging time extension caused by the escape of nitrogen, and a large amount of nitrogen is needed to fill the sampling bottle. It can also avoid the interference of subsequent sampling experimental data caused by the incomplete cleaning of the sampling bottle.

Description

Technical Field

[0001] This utility model relates to the field of chemical sampling technology, and in particular to a sealed sampling mechanism. Background Technology

[0002] Existing patent CN221078137U discloses an air-isolated sampling device, including a sampling control valve, an inert gas replacement mechanism, a sealing control valve, and a sampling bottle. The sample container is connected to a sampling tube. The sampling control valve is located on the sampling tube, and the sealing control valve is connected to the inlet end of the sampling bottle. The inert gas replacement mechanism is connected between the sampling control valve and the sealing control valve. The inert gas replacement mechanism and the sampling bottle are sequentially connected to the outlet end of the sampling control valve on the sampling tube. Opening the sealing control valve allows the inert gas replacement mechanism to expel air from the sampling device. Then, the sampling control valve is opened again to perform sampling. The sampling process is simple and safe. Throughout the entire sampling process, the sampling reagent will not come into contact with air, completely isolating the sample from air and achieving sealed sampling.

[0003] In the process of realizing this utility model, the inventors discovered the following problems with the existing technology: 1. After opening the nitrogen inlet control valve and the nitrogen outlet control valve, most of the nitrogen will escape directly from the nitrogen outlet pipe; 2. Viscous liquids or easily crystallizing media in chemical products are difficult to clean in the sampling bottle, and samples may remain in the internal dead corners.

[0004] Therefore, this application provides a sealed sampling mechanism to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a sealed sampling mechanism. This device avoids prolonged nitrogen filling time due to nitrogen escape and the need for large amounts of nitrogen to fill the sampling bottle. It also prevents interference with subsequent sampling experimental data due to unclean sampling bottles.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A sealed sampling mechanism includes a sampling device, a nitrogen filling device, and a connecting device. The sampling device includes a sampling bottle, and a sampling cap is threaded onto the upper end of the outer wall of the sampling bottle. A sealed feed pipe is fixedly connected to the middle of the upper end face of the sampling cap.

[0008] The nitrogen filling device includes a nitrogen pipe, with a nitrogen inlet pipe fixedly connected to the lower side of the outer wall of the nitrogen pipe and a nitrogen outlet pipe fixedly connected to the upper side of the outer wall of the nitrogen pipe.

[0009] Furthermore, the connecting device includes a sampling tube and two connecting tubes, and a sampling control valve is fixedly installed around the sampling tube.

[0010] Furthermore, both the upper and lower ends of the nitrogen pipe are threadedly connected to the upper end of the sealed feed pipe and the lower end of the sampling pipe via connecting pipes.

[0011] Furthermore, a sealing control valve is fixedly installed around the sealed feed pipe.

[0012] Furthermore, an inlet valve is fixedly installed around the nitrogen inlet pipe, and an outlet valve is fixedly installed around the nitrogen outlet pipe.

[0013] Furthermore, a paint can is fixedly connected to the upper end of the sampling tube.

[0014] Furthermore, a nitrogen tank body is fixedly connected to the other end of the nitrogen inlet pipe, and a nitrogen tank trolley is fixedly installed on the lower end face of the nitrogen tank body.

[0015] This utility model has the following beneficial effects:

[0016] 1. The present invention proposes a sealed sampling mechanism that changes the position of the nitrogen inlet pipe and the nitrogen outlet pipe, sets a distance between the nitrogen outlet and the nitrogen inlet, and sets the nitrogen outlet above the nitrogen inlet. Since nitrogen is denser than air, it can effectively prevent nitrogen from escaping, avoid prolonged nitrogen filling time due to nitrogen escape, and avoid the need to use a large amount of nitrogen to fill the sampling bottle.

[0017] 2. The present invention proposes a sealed sampling mechanism with a cylindrical flat-bottomed sampling bottle. After sampling, due to the dead corner between the bottom and the body of the bottle, if the sample is a viscous liquid or a medium that is prone to crystallization, it will be difficult to clean and thus leave sample residue. When the bottom of the bottle is set to a semi-circular bottom surface, since the bottom surface has no edges and corners and is a smooth surface, sample residue can be avoided. Attached Figure Description

[0018] Figure 1 This is an overall isometric schematic diagram of the present invention;

[0019] Figure 2 This is a front view schematic diagram of the entire utility model;

[0020] Figure 3 This is a bottom view of the sampling bottle of this utility model;

[0021] Figure 4 This is a bottom view of the sampling cap and sealing feed tube of this utility model;

[0022] Figure 5 This is an isometric schematic diagram of the nitrogen filling device of this utility model;

[0023] Figure 6 This is a schematic diagram of the sampling tube of this utility model.

[0024] Figure 7 This is a schematic diagram of the overall connection structure of this utility model.

[0025] Legend:

[0026] 1. Sampling device; 2. Nitrogen filling device; 3. Connecting device; 101. Sampling bottle; 102. Sampling cap; 103. Sealed feed pipe; 104. Sealed control valve; 201. Nitrogen pipe; 202. Nitrogen inlet pipe; 203. Nitrogen outlet pipe; 204. Outlet pipe valve; 205. Inlet pipe valve; 206. Nitrogen tank body; 207. Nitrogen tank trolley; 301. Sampling tube; 302. Sampling control valve; 303. Connecting pipe. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Reference Figure 1 , Figure 3 , Figure 4 The present invention provides an embodiment of a sealed sampling mechanism, comprising a sampling device 1, a nitrogen filling device 2, and a connecting device 3. The sampling device 1 includes a sampling bottle 101, a sampling cap 102 threadedly fitted to the upper end of the outer wall of the sampling bottle 101, a sealed feed pipe 103 fixedly connected to the middle of the upper end face of the sampling cap 102, and a sealed control valve 104 fixedly provided around the sealed feed pipe 103.

[0029] Specifically, after sampling viscous liquids such as chemical products like paint, residues may remain in the hard-to-clean areas inside the sampling bottle 101. The bottom of the sampling bottle 101 is designed with a semi-circular bottom to prevent sample residues from remaining due to the hard-to-clean areas. When the sealing control valve 104 is closed, all air entry and sample contamination can be prevented.

[0030] Reference Figure 2 , Figure 5 , Figure 7The nitrogen filling device 2 includes a nitrogen pipe 201. A nitrogen inlet pipe 202 is fixedly connected to the lower side of the outer wall of the nitrogen pipe 201. A nitrogen outlet pipe 203 is fixedly connected to the upper side of the outer wall of the nitrogen pipe 201. Both the upper and lower ends of the nitrogen pipe 201 are threadedly connected to the upper end of the sealed feed pipe 103 and the lower end of the sampling pipe 301 through connecting pipes 303. An inlet valve 205 is fixedly installed around the nitrogen inlet pipe 202. An outlet valve 204 is fixedly installed around the nitrogen outlet pipe 203. A nitrogen tank body 206 is fixedly connected to the other end of the nitrogen inlet pipe 202. A nitrogen tank trolley 207 is fixedly installed on the lower end face of the nitrogen tank body 206.

[0031] Specifically, by setting the nitrogen outlet pipe 203 and the nitrogen inlet pipe 202 to be on different horizontal lines, nitrogen can be prevented from escaping directly from the nitrogen outlet pipe 203. When the outlet pipe valve 204 and the inlet pipe valve 205 are opened together, because nitrogen is denser than air, the nitrogen inside the nitrogen tank body 206 will enter the sampling bottle 101 through the nitrogen inlet pipe 202 and the nitrogen pipe 201 in sequence, squeezing the air out of the sampling bottle 101 and discharging it from the nitrogen outlet pipe 203.

[0032] Reference Figure 6 , Figure 7 The connecting device 3 includes a sampling tube 301 and two connecting tubes 303. A sampling control valve 302 is fixedly installed around the sampling tube 301, and a paint tank is fixedly connected to the upper end of the sampling tube 301.

[0033] Specifically, the sampling control valve 302 can precisely control the flow rate of the sample to prevent excessive flow and waste.

[0034] Working principle: When the device is needed, first connect the sampling tube 301 to the paint tank and connect the nitrogen inlet pipe 202 to the nitrogen tank body 206. Open both the outlet valve 204 and the inlet valve 205 simultaneously. Because nitrogen is denser than air, it will enter the sampling bottle 101 sequentially through the nitrogen inlet pipe 202 and the nitrogen pipe 201, displacing air from the sampling bottle 101 and expelling it through the nitrogen outlet pipe 203. When the nitrogen filling time is nearly complete, close the outlet valve 204 and the inlet valve 205 sequentially. Then, open the sampling control valve 302 around the sampling tube 301. The sample will enter the sampling bottle 101 sequentially through the connecting pipe 303, the nitrogen pipe 201, and the sealed feed pipe 103. When the inflow is about to reach the required amount, control the sampling control valve 302 to reduce the flow until it is closed. Then, close the sealing control valve 104 and remove the sampling bottle 101 along with the sealed feed pipe 103. The semi-circular bottom design of the sampling bottle 101 prevents sample residue from remaining due to incomplete cleaning in hard-to-reach areas.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealed sampling mechanism, comprising a sampling device (1), a nitrogen filling device (2), and a connecting device (3), characterized in that: The sampling device (1) includes a sampling bottle (101), and a sampling cap (102) is threaded onto the upper end of the outer wall of the sampling bottle (101). A sealing feed pipe (103) is fixedly connected to the middle of the upper end face of the sampling cap (102). The nitrogen filling device (2) includes a nitrogen pipe (201), a nitrogen inlet pipe (202) is fixedly connected to the lower side of the outer wall of the nitrogen pipe (201), and a nitrogen outlet pipe (203) is fixedly connected to the upper side of the outer wall of the nitrogen pipe (201).

2. The sealed sampling mechanism according to claim 1, characterized in that: The connecting device (3) includes a sampling tube (301) and two connecting tubes (303), and a sampling control valve (302) is fixedly installed around the sampling tube (301).

3. The sealed sampling mechanism according to claim 2, characterized in that: The upper and lower ends of the nitrogen pipe (201) are threadedly connected to the upper end of the sealed feed pipe (103) and the lower end of the sampling pipe (301) through connecting pipe (303).

4. The sealed sampling mechanism according to claim 1, characterized in that: A sealing control valve (104) is fixedly installed around the sealed feed pipe (103).

5. A sealed sampling mechanism according to claim 1, characterized in that: An inlet valve (205) is fixedly installed around the nitrogen inlet pipe (202), and an outlet valve (204) is fixedly installed around the nitrogen outlet pipe (203).

6. A sealed sampling mechanism according to claim 2, characterized in that: A paint can is fixedly connected to the upper end of the sampling tube (301).

7. A sealed sampling mechanism according to claim 1, characterized in that: The nitrogen inlet pipe (202) is fixedly connected to the nitrogen tank body (206) at the other end, and a nitrogen tank trolley (207) is fixedly installed on the lower end face of the nitrogen tank body (206).

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