Gas / liquid tight sampling device

Abstract

The application belongs to the field of petrochemical detection equipment and relates to a gas / liquid closed sampling device. The gas / liquid closed sampling device comprises a sampling bottle and two sampling tubes, one end of each of the two sampling tubes is provided with a sampling valve, the sampling bottle is provided with a valve corresponding to the sampling valve one by one, the valve and the corresponding sampling valve are detachably connected, and the other end of the two sampling tubes is communicated with a material conveying pipeline. Since the sampling valve and the valve are detachably connected and the distance between them is short, the amount of gas or liquid remaining during sampling and leaking to the external environment is effectively reduced, the influence on the external environment is reduced, when the sampling bottle needs to be sampled again, the valve is connected with the sampling valve again, the first sampling object in the sampling bottle does not need to be deliberately treated and can be directly returned to the material conveying pipeline, so that the waste is reduced and the operation is convenient and fast.

Description

Technical Field

[0001] This application belongs to the field of petrochemical testing equipment and relates to a gas / liquid closed sampling device. Background Technology

[0002] Currently, closed samplers are used for pipeline sampling in quality inspection and analysis systems in the petrochemical industry both domestically and internationally. The two most common types of closed samplers are liquid samplers and gas samplers. Liquid samplers typically use sealed glass bottles, while gas samplers typically use sealed steel cylinders.

[0003] Patent CN106989963B discloses a closed-loop gas sampling method for pipelines. The upper end of the sampling cylinder is connected to a cylinder outlet needle valve, and the lower end of the sampling cylinder is connected to a cylinder inlet needle valve. The end of a fourth fitting away from the fourth interface is connected to the cylinder inlet needle valve. A first quick connector is fitted between the fourth fitting and the cylinder inlet needle valve. The sampling cylinder is connected to a fifth fitting through the cylinder outlet needle valve. The fifth fitting is connected to a third fitting. A second quick connector is fitted between the fifth fitting and the cylinder outlet needle valve. A vent valve and a check valve are provided on the body of the third fitting.

[0004] In the above sampling method, when the gas cylinder is removed, the gas or liquid remaining in the fourth fitting may leak into the environment, causing environmental pollution. Utility Model Content

[0005] In order to reduce the pollution to the external environment during sampling, this application provides a closed gas / liquid sampling device.

[0006] The gas / liquid closed sampling device provided in this application adopts the following technical solution:

[0007] A gas / liquid closed sampling device includes a sampling bottle and two sampling tubes. Each of the two sampling tubes is provided with a sampling valve at one end near the sampling bottle. The sampling bottle is provided with a valve corresponding to each sampling valve. The valve and its corresponding sampling valve are detachably connected. The ends of the two sampling tubes away from the sampling valves are connected to a material conveying pipeline.

[0008] By adopting the above technical solution, petrochemical gases or liquids flow in the material conveying pipeline. When sampling is required, both the sampling valve and the valve are opened. The gas or liquid flows from one sampling tube into the sampling bottle, and then from the other sampling tube into the material conveying pipeline. This continues for a certain period of time. Then, the sampling valve and the valve are closed, and the valve is disconnected from the sampling valve, completing the sampling. Because the sampling valve and the valve are detachably connected and the distance between them is short, the amount of gas or liquid leaked into the external environment during sampling is effectively reduced, minimizing the impact on the external environment. When the sampling bottle needs to be sampled a second time, the valve is reconnected to the sampling valve. The sample taken in the sampling bottle from the first sampling does not need to be specially processed and can be directly returned to the material conveying pipeline, thereby reducing waste and making the operation convenient and quick.

[0009] Preferably, the material conveying pipeline is provided with sampling bypasses at intervals corresponding to the sampling tubes. One end of the sampling bypass is connected to the material conveying pipeline, and the other end of the sampling bypass is provided with a control valve. The end of the sampling tube away from the sampling valve is connected to the control valve.

[0010] By adopting the above technical solution, when the control valve, sampling valve, and valve are opened, the gas or liquid in the material conveying pipeline flows into the sampling bottle through the sampling bypass and sampling tube.

[0011] Preferably, the material conveying pipeline is equipped with a flow regulating valve, which is located between the two sampling bypasses.

[0012] By adopting the above technical solution, when sampling is required, the flow regulating valve is closed to ensure that some gas or liquid can flow into the sampling bypass and pass through the sampling bottle. After sampling, the flow regulating valve is opened to the maximum to ensure that the gas or liquid can flow normally.

[0013] Preferably, the material conveying pipeline includes a discharge pipe connected to the tank truck and a feed pipe connected to the gas holder, wherein one sampling pipe is connected to the discharge pipe at the end away from the sampling valve, and the other sampling pipe is connected to the feed pipe at the end away from the sampling valve.

[0014] By adopting the above technical solution, the sampling bottle is connected to the discharge pipe of the tanker and the inlet pipe of the gas holder through the sampling tube, so as to achieve closed sampling during loading.

[0015] Preferably, the end of the discharge pipe away from the tank car has a discharge valve, the end of the feed pipe away from the degassing tank has a connecting valve, one sampling pipe is connected to the discharge valve at the end away from the sampling valve, and the other sampling pipe is connected to the connecting valve at the end away from the sampling valve.

[0016] By adopting the above technical solution, when taking samples, the discharge valve and the connecting valve can be closed first, the sampling tube can be connected, and then the discharge valve and the connecting valve can be opened to take samples; after the sampling is completed, the discharge valve and the connecting valve can be closed, and the sampling tube can be removed.

[0017] Preferably, the sampling tube is a flexible tube and the sampling bottle is a steel cylinder.

[0018] By adopting the above technical solutions, the sampling tube is made of flexible tubing, which is easy to connect, and the sampling bottle is designed as a steel cylinder, which has good strength and improves the safety of gas or liquid storage.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] 1. This application effectively reduces the amount of gas or liquid leaked into the external environment during sampling, thereby reducing the impact on the external environment;

[0021] 2. When the sampling bottle needs to be sampled a second time, the valve is reconnected to the sampling valve. The items sampled in the sampling bottle for the first time do not need to be specially processed and can be directly returned to the material conveying pipeline, thereby reducing waste and making the operation convenient and quick. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of Embodiment 1 of this application.

[0023] Figure 2 This is a structural schematic diagram of Embodiment 2 of this application.

[0024] Explanation of reference numerals in the attached diagram: 1. Sampling bottle; 2. Sampling tube; 3. Sampling valve; 4. Valve; 5. Material conveying pipeline; 6. Sampling bypass; 7. Control valve; 8. Flow regulating valve; 9. Tank car; 10. Discharge pipe; 11. Feed pipe; 12. Discharge valve; 13. Connecting valve. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail. Example 1

[0026] like Figure 1 As shown, the gas / liquid closed sampling device includes a sampling bottle 1 and two sampling tubes 2.

[0027] In this embodiment, the sampling bottle 1 is preferably a steel cylinder. Alternatively, the sampling bottle 1 can also be made of fluoroplastic (PFA).

[0028] Sampling tube 2 uses a flexible tube for easy connection. As an alternative, a rigid tube could also be used, but it would be more difficult to connect.

[0029] like Figure 1As shown, each of the two sampling tubes 2 is equipped with a sampling valve 3 at one end near the sampling bottle 1. The sampling bottle 1 is equipped with a valve 4 that corresponds to the sampling valve 3. The valve 4 is located at both ends of the sampling bottle 1 along its length. The valve 4 and its corresponding sampling valve 3 are detachably connected.

[0030] In this embodiment, the valve 4 and the sampling valve 3 can be connected by fasteners such as screws. Alternatively, they can be connected by threads or snap-fit.

[0031] like Figure 1 As shown, the ends of the two sampling tubes 2 furthest from the sampling valve 3 are connected to the material conveying pipeline 5.

[0032] In this embodiment, the material conveying pipeline 5 is provided with sampling bypasses 6 at intervals, corresponding one-to-one with the sampling tubes 2. One end of the sampling bypass 6 is connected to the material conveying pipeline 5, and the other end of the sampling bypass 6 is provided with a control valve 7. The end of the sampling tube 2 away from the sampling valve 3 is connected to the control valve 7. When the control valve 7, sampling valve 3, and valve 4 are opened, the gas or liquid in the material conveying pipeline 5 flows into the sampling bottle 1 through the sampling bypass 6 and the sampling tube 2.

[0033] Alternatively, the control valve 7 can be designed in the middle of the sampling bypass 6, which facilitates connection with the sampling tube 2.

[0034] like Figure 1 As shown, the material conveying pipeline 5 is equipped with a flow regulating valve 8, which is located between the two sampling bypasses 6. When sampling is required, especially when the material conveying pipeline 5 is set vertically, the flow regulating valve 8 is closed to ensure that some gas or liquid can flow into the sampling bypass 6 and pass through the sampling bottle 1.

[0035] The working principle of this embodiment is as follows: Petrochemical gas or liquid flows in the material conveying pipeline 5. When sampling is required, control valve 7, sampling valve 3, and valve 4 are all opened, and flow regulating valve 8 is closed. The gas or liquid flows from one sampling tube 2 to the sampling bottle 1, and then from another sampling tube 2 to the material conveying pipeline 5 for 1-2 minutes. Then control valve 7, sampling valve 3, and valve 4 are closed, valve 4 is removed from sampling valve 3 to complete the sampling, and flow regulating valve 8 is opened to the maximum. Example 2

[0036] like Figure 2As shown, this embodiment is largely the same as embodiment one, except that in this embodiment, the material conveying pipeline 5 includes a discharge pipe 10 connected to the tank truck 9 and a feed pipe 11 connected to the gas holder. The end of the discharge pipe 10 away from the tank truck 9 has a discharge valve 12, and the end of the feed pipe 11 away from the gas holder has a connecting valve 13. One sampling pipe 2 is connected to the discharge valve 12 at the end away from the sampling valve 3, and the other sampling pipe 2 is connected to the connecting valve 13 at the end away from the sampling valve 3.

[0037] When taking samples, first close the discharge valve 12 and the connecting valve 13, connect the sampling tube 2, and then open the discharge valve 12 and the connecting valve 13 to take samples; after taking samples, close the discharge valve 12 and the connecting valve 13 and remove the sampling tube 2.

[0038] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gas / liquid tight sampling device, characterized by It includes a sampling bottle (1) and two sampling tubes (2). Each of the two sampling tubes (2) is equipped with a sampling valve (3) at one end near the sampling bottle (1). The sampling bottle (1) is equipped with a valve (4) that corresponds to the sampling valve (3). The valve (4) and the corresponding sampling valve (3) are detachably connected. The ends of the two sampling tubes (2) away from the sampling valve (3) are connected to the material conveying pipeline (5).

2. The gas / liquid closed sampling device according to claim 1, characterized in that, The material conveying pipeline (5) is provided with sampling bypasses (6) that correspond one-to-one with the sampling tube (2). One end of the sampling bypass (6) is connected to the material conveying pipeline (5), and the other end of the sampling bypass (6) is provided with a control valve (7). The end of the sampling tube (2) away from the sampling valve (3) is connected to the control valve (7).

3. The gas / liquid closed sampling device according to claim 2, characterized in that, The material conveying pipeline (5) is equipped with a flow regulating valve (8), which is located between the two sampling bypasses (6).

4. The gas / liquid closed sampling device according to claim 1, characterized in that, The material conveying pipeline (5) includes a discharge pipe (10) connected to the tank truck (9) and a feed pipe (11) connected to the gas holder. One sampling pipe (2) is connected to the discharge pipe (10) at one end away from the sampling valve (3), and the other sampling pipe (2) is connected to the feed pipe (11) at one end away from the sampling valve (3).

5. The gas / liquid closed sampling device according to claim 4, characterized in that, The discharge pipe (10) has a discharge valve (12) at the end away from the tank car (9), and the feed pipe (11) has a connecting valve (13) at the end away from the degassing cabinet. One sampling pipe (2) is connected to the discharge valve (12) at the end away from the sampling valve (3), and the other sampling pipe (2) is connected to the connecting valve (13) at the end away from the sampling valve (3).

6. The gas / liquid closed sampling device according to claim 1, characterized in that, Preferably, the sampling tube (2) is a flexible tube and the sampling bottle (1) is a steel cylinder.

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