Gas-liquid double-sampling closed sampling device

Abstract

The utility model discloses a closed sampling device for gas-liquid double sampling, which comprises a purging system, a gas-liquid separation sampling system and a waste gas discharge system, the gas-liquid separation sampling system is respectively connected with the purging system and the waste gas discharge system through pipelines, and a first purging valve, a pressure regulating valve and a second purging valve are sequentially arranged on a purging pipeline. The gas-liquid separation sampling system comprises a sampling steel cylinder, a gas-liquid separation tank, a transparent sampling bottle, quick connectors and a plurality of control valves, the sampling steel cylinder is in sealed connection with the first pipeline and the second pipeline through the corresponding quick connectors, and the gas-liquid separation tank is in sealed connection with the transparent sampling bottle through a pipeline; a second inlet of the gas-liquid separation tank is in sealed connection with the medium pipeline; and the waste gas discharge system comprises a fourth pipeline, a fifth pipeline, a gas discharge one-way valve, a liquid discharge one-way valve and a main discharge valve. The gas sampling device is convenient to operate, safe and environment-friendly, simultaneously realizes closed collection of gas samples and liquid samples, greatly improves the sampling efficiency, and saves the sampling time.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical sampling device technology, and in particular to a closed sampling device for gas-liquid dual sampling. Background Technology

[0002] With the rapid development of industries such as industry, environmental protection, and petrochemicals, the importance of sampling analysis in practical applications has become increasingly prominent. Sampling analysis plays a key role in process production, material analysis, emergency accident handling, environmental monitoring, and emergency response. Through analysis, data can be quickly obtained and timely feedback can be provided for decision-making, providing effective basis for subsequent processing. In particular, in the petrochemical field, the ability to safely and quickly separate gas and liquid is especially important. To ensure accurate and reliable sampling, gas-liquid separation sampling devices are even more crucial. However, existing sampling devices can only sample one type of gas or liquid. In order to classify gases and liquids, some self-made gas-liquid separation sampling devices have emerged. However, these devices are complex in structure, inconvenient to operate, unsafe to use, and the gas and liquid samples are not accurate enough, which cannot meet the current development needs.

[0003] Therefore, developing a closed sampling device for gas-liquid dual sampling that is easy to operate, safe, environmentally friendly, and has high sampling efficiency is an urgent problem to be solved by those skilled in the art.

[0004] This utility model of a gas-liquid dual-sampling closed sampling device is convenient to operate, safe and environmentally friendly. It can simultaneously collect gas and liquid samples in a closed manner, which greatly improves sampling efficiency, saves sampling time, and makes sampling more diversified and accurate. It can ensure that the collected gas and liquid samples can truly reflect their original state and provide a reliable sample basis for subsequent analysis and detection. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a closed sampling device for gas-liquid dual sampling that is simple in structure, easy to operate, safe and reliable, environmentally friendly, and has high sampling accuracy and efficiency.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] A closed sampling device for dual gas-liquid sampling, characterized in that it comprises: a purging system, a gas-liquid separation sampling system, and an exhaust gas emission system. The gas-liquid separation sampling system is respectively connected to the purging system and the exhaust gas emission system via pipelines. The purging system includes a first purging valve, a pressure regulating valve, a second purging valve, and a purging pipeline. The first purging valve, the pressure regulating valve, and the second purging valve are sequentially arranged on the purging pipeline. One end of the purging pipeline is connected to an external purging device. The gas-liquid separation sampling system includes a sampling cylinder, a gas-liquid separation tank, a transparent sampling bottle, quick connectors, and multiple control valves. The inlet and outlet of the sampling cylinder are respectively sealed to one end of the first pipeline and the second pipeline via corresponding quick connectors. The other ends of the first pipeline and the second pipeline are connected in parallel to the first gas-liquid separation tank. The system includes an inlet sealed connection, with multiple control valves correspondingly installed on the first and second pipelines. The outlet of the gas-liquid separator is sealed to a transparent sampling bottle via a third pipeline, which is equipped with a sampling valve. The second inlet of the gas-liquid separator is sealed to one end of a medium pipeline, which is equipped with an inlet valve. The exhaust gas system includes a fourth pipeline, a fifth pipeline, a gas exhaust check valve, a liquid exhaust check valve, and a total exhaust valve. One end of the fourth pipeline is connected to the transparent sampling bottle, and the other end of the fourth pipeline is connected in parallel with the fifth pipeline and then connected to the exhaust gas collection device via an exhaust pipeline. The gas exhaust check valve is installed on the fifth pipeline, the liquid exhaust check valve is installed on the fourth pipeline, and the total exhaust valve is correspondingly installed on the exhaust pipeline.

[0008] The above structure also includes a first pressure gauge and a second pressure gauge. The first pressure gauge is installed on the first pipeline, and the second pressure gauge is installed on the sampling cylinder. The first pressure gauge and the second pressure gauge are respectively sealed to the first pipeline and the sampling cylinder.

[0009] In the above structure, there are two quick connectors, which are respectively located near the inlet and outlet of the sampling cylinder. The two quick connectors are respectively sealed to the first pipeline, the second pipeline and the inlet and outlet of the corresponding sampling cylinder. The two quick connectors are self-closing quick connectors.

[0010] In the above structure, the transparent sampling bottle is provided with a stainless steel protective sleeve with a viewing window, and the mouth of the transparent sampling bottle is provided with a double needle assembly and an automatic rebound rubber pad. The transparent sampling bottle is a glass bottle.

[0011] In the above structure, the multiple control valves include a first control valve, a second control valve, and a third control valve. The first control valve and the second control valve are installed on the first pipeline and the second pipeline, respectively, adjacent to the inlet and outlet of the sampling cylinder. The other ends of the first control valve and the second control valve are respectively sealed and connected to the corresponding first pipeline and the second pipeline through the corresponding quick connectors. The third control valve is installed on the second pipeline adjacent to the gas-liquid separator.

[0012] In the above structure, the second pipeline is a flexible tube made of metal material.

[0013] In the above structure, the second purge valve is a one-way valve.

[0014] In the above structure, the gas-liquid separation sampling system includes a gas-liquid separation system, a gas sampling system, and a liquid separation system.

[0015] The beneficial effects of this utility model are as follows:

[0016] This novel gas-liquid dual-sampling closed sampling device can simultaneously collect gas and liquid samples in a closed environment, overcoming the limitation of existing sampling devices that can only sample one type of gas or liquid. This makes sampling more diversified and precise, ensuring that the collected gas and liquid samples accurately reflect their original state and providing a reliable sample basis for subsequent analysis and testing. This invention is easy to operate, safe, reliable, and environmentally friendly, with high sampling efficiency, greatly saving sampling time and improving the guarantee for subsequent analysis and production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the closed sampling device for gas-liquid dual sampling of this utility model.

[0018] In the diagram, 1-first purge valve, 2-pressure regulating valve, 3-second purge valve, 4-sampling cylinder, 5-gas-liquid separator, 6-transparent sampling bottle, 7-quick connector, 8-inlet valve, 9-gas discharge check valve, 10-liquid discharge check valve, 11-main discharge valve, 12-first pressure gauge, 13-second pressure gauge, 14-first control valve, 15-second control valve, 16-third control valve, 17-second pipeline, 18-sampling valve, 19-dual needle assembly, N1-purge port, N2-medium inlet, N3-exhaust port. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] like Figure 1 As shown, a closed sampling device for gas-liquid dual sampling is characterized by comprising: a purging system, a gas-liquid separation sampling system, and an exhaust gas emission system. The gas-liquid separation sampling system is connected to the purging system and the exhaust gas emission system via pipelines, respectively. The purging system includes a first purging valve 1, a pressure regulating valve 2, a second purging valve 3, and a purging pipeline. The first purging valve 1, pressure regulating valve 2, and second purging valve 3 are sequentially arranged on the purging pipeline. One end of the purging pipeline is connected to an external purging device. The gas-liquid separation sampling system includes a sampling cylinder 4, a gas-liquid separation tank 5, a transparent sampling bottle 6, a quick connector 7, and multiple control valves. The inlet and outlet of the sampling cylinder 4 are respectively sealed to one end of the first pipeline and the second pipeline via corresponding quick connectors 7. The other ends of the first pipeline and the second pipeline are connected in parallel to the gas-liquid separation system. The first inlet of tank 5 is sealed, and multiple control valves are correspondingly installed on the first and second pipelines. The outlet of gas-liquid separator 5 is sealed to transparent sampling bottle 6 through a third pipeline. A sampling valve 18 is installed on the third pipeline. The second inlet of gas-liquid separator 5 is sealed to one end of the medium pipeline. An inlet valve 8 is installed on the medium pipeline. The exhaust gas emission system includes a fourth pipeline, a fifth pipeline, a gas emission check valve 9, a liquid emission check valve 10, and a total discharge valve 11. One end of the fourth pipeline is connected to transparent sampling bottle 6, and the other end of the fourth pipeline is connected in parallel with the fifth pipeline and then connected to the exhaust gas collection device through the discharge pipeline. The gas emission check valve 9 is installed on the fifth pipeline, the liquid emission check valve 10 is installed on the fourth pipeline, and the total discharge valve 11 is correspondingly installed on the discharge pipeline.

[0021] Specifically, in this embodiment, one end of the purge pipeline is connected to the purge port N1 of the external purge device. When gas sampling is required, the gas sampling system is used to collect the separated gas sample into the sampling cylinder 4 via quick connector 7, valves, hoses, and connecting components. The inlet and outlet of the sampling cylinder 4 are controlled by safe and reliable needle valves for opening / closing, and are equipped with self-closing quick connectors 7 and metal hoses, making the installation and disassembly of the seamless gas cylinder safer, more convenient, and faster. When liquid sampling is required, the liquid sampling system is used to collect the separated liquid sample into the transparent sampling bottle 6 via a double-needle assembly, valves, and connecting components. For sealed sampling in the transparent sampling bottle 6, a double-needle assembly 19 and a rubber gasket seal are typically used. After sampling, the rubber gasket automatically springs back and closes, providing excellent sealing performance. The transparent sampling bottle 6 is equipped with a stainless steel protective sleeve with a viewing window, ensuring sampling safety while allowing for observation of the liquid level inside the transparent sampling bottle 6 at any time. After gas and liquid samples are collected separately, residual waste gas from the sampling process can be discharged into the waste gas recovery pipeline through the emission system, avoiding direct emission into the atmosphere and causing environmental pollution. One-way valves are installed in both the gas and liquid emission pipelines of the waste gas system to prevent backflow and sample mixing.

[0022] Specifically, in this embodiment, an inlet valve 8 is provided on the medium pipeline, one end of the medium pipeline is sealed and connected to the gas-liquid separator 5, and the other end of the medium pipeline is provided with a medium inlet N2.

[0023] Specifically, in this embodiment, the main discharge valve 11 is correspondingly installed on the discharge pipeline, and the end of the discharge pipeline is provided with a waste gas collection device. The discharge pipeline is connected to the waste gas collection device through the corresponding exhaust port N3.

[0024] In a preferred embodiment of this invention, a first pressure gauge 12 and a second pressure gauge 13 are further included. The first pressure gauge 12 is disposed on the first pipeline, and the second pressure gauge 13 is disposed on the sampling cylinder 4. The first pressure gauge 12 and the second pressure gauge 13 are respectively sealed to the first pipeline and the sampling cylinder 4. Two quick connectors 7 are provided, respectively located adjacent to the inlet and outlet of the sampling cylinder 4. The two quick connectors 7 are respectively sealed to the first pipeline, the second pipeline, and the corresponding inlet and outlet of the sampling cylinder 4. The two quick connectors 7 are self-closing quick connectors.

[0025] Specifically, in this embodiment, the transparent sampling bottle 6 with the adhesive pad is inserted into the stainless steel protective sleeve until the double needle assembly 19 pierces the adhesive pad, connecting the transparent sampling bottle 6 and the sampling line.

[0026] In a preferred embodiment of this utility model, the transparent sampling bottle 6 is provided with a stainless steel protective sleeve with a viewing window, and the mouth of the transparent sampling bottle 6 is provided with a double needle assembly and an automatic rebound rubber pad. The transparent sampling bottle 6 is a glass bottle.

[0027] Specifically, in this embodiment, the dual-needle assembly 19 includes an injection needle and an exhaust needle.

[0028] In a preferred embodiment of this utility model, the plurality of control valves include a first control valve 14, a second control valve 15, and a third control valve 16. The first control valve 14 and the second control valve 15 are disposed on the first pipeline and the second pipeline, respectively, adjacent to the inlet and outlet of the sampling cylinder 4. The other ends of the first control valve 14 and the second control valve 15 are respectively sealed to the corresponding first pipeline and the second pipeline through corresponding quick connectors 7. The third control valve 16 is disposed on the second pipeline adjacent to the gas-liquid separator 5.

[0029] Specifically, in this embodiment, the first control valve 14 and the second control valve 15 are needle valves.

[0030] In a preferred embodiment of this invention, the second pipeline is a flexible hose made of metal material.

[0031] Specifically, in this embodiment, the second pipeline is a metal hose or a hose made of part of a metal material. In a preferred embodiment of this utility model, the second purge valve 2 is a one-way valve.

[0032] In a preferred embodiment of this invention, the gas-liquid separation sampling system includes a gas-liquid separation system, a gas sampling system, and a liquid separation system.

[0033] The operation method and working principle of this utility model are as follows:

[0034] Before sampling, confirm that all valves on the device are closed and that the first pressure gauge 12 (pipeline pressure gauge) is zero. Install sampling cylinder 4, ensuring that sampling cylinder 4 is securely and leak-free connected to the sampling pipeline via inlet quick connector 7 and outlet quick connector 7.

[0035] During sampling, first open inlet valve 4, third control valve 16, inlet cylinder valve 9, outlet cylinder valve 12, and discharge valve 17 to allow the sample to displace within the sampling pipeline for 1-2 minutes, ensuring the representativeness of the sampled item. Then close bypass valve 16, first control valve 14, second control valve 15, and liquid discharge check valve 10 to allow the sample to enter gas-liquid separator 5. After a period of time, once the first pressure gauge 12 (or the pipeline pressure gauge) indicates stable readings, close inlet valve 8 and begin sampling.

[0036] Gas sampling: Open the first control valve 14 (inlet cylinder valve), and after the indication on the second pressure gauge 13 (wait for the cylinder pressure gauge to stabilize) is stable, close the first control valve 14.

[0037] Liquid sampling: Open sampling valve 18 and total drain valve 11. When the sample volume in transparent sampling bottle 6 reaches the required amount, close sampling valve 18 and total drain valve 11.

[0038] After the gas and liquid sampling is completed, open the third control valve 16 (bypass valve) and the main discharge valve 11 to discharge the residual gas in the sampling pipeline. After the indicator needle on the first pressure gauge 12 (waiting for the pipeline pressure gauge) returns to zero, close the third control valve 16 (bypass valve) and the main discharge valve 11.

[0039] After sampling, pipeline purging is required. Remove sampling cylinder 4 and interlock the female connector of inlet quick connector 7 and the male connector of outlet quick connector 7 to form a closed loop in the pipeline. Remove glass bottle 20 and replace it with a waste glass bottle, then begin purging. First, open exhaust valve 17 and bypass valve 7, then open purge valve 1 and pressure regulating valve 2. Adjust the purge gas pressure to a suitable level and purge the entire system for approximately one minute. Finally, close purge valve 1 and pressure regulating valve 2. After the indicator needle on pipeline pressure gauge 5 returns to zero, close bypass valve 7 and exhaust valve 17 to complete the final sampling process.

[0040] Specifically, in this embodiment, the sampling device collects the separated gas sample into the sampling cylinder 4 via a quick connector 7, valves, hoses, and connecting components. The inlet and outlet of the sampling cylinder 4 are controlled by safe and reliable needle valves, and it is equipped with a self-closing quick connector 7 and a metal hose, making the installation and disassembly of the seamless gas cylinder safer, more convenient, and faster. The sampling device collects the separated liquid sample into the transparent sampling bottle 6 via a double-needle assembly, valves, and connecting components. For sealed sampling in the transparent sampling bottle 6, a double-needle assembly and a rubber gasket seal are typically used. After sampling, the rubber gasket automatically springs back and closes, providing excellent sealing performance. The transparent sampling bottle 6 is equipped with a stainless steel protective sleeve with a viewing window, ensuring sampling safety while allowing for observation of the liquid level inside the sampling glass bottle at any time. The sampling device can simultaneously collect gas and liquid samples in a sealed manner, overcoming the limitation of existing sampling devices that can only sample one type of gas or liquid, making sampling more diversified and precise; it is also convenient, safe, and environmentally friendly, greatly improving sampling efficiency and saving sampling time.

[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A closed sampling device for gas-liquid dual sampling, characterized in that, include: The system comprises a purging system, a gas-liquid separation sampling system, and an exhaust gas emission system. The gas-liquid separation sampling system is connected to the purging system and the exhaust gas emission system via pipelines. The purging system includes a first purging valve, a pressure regulating valve, a second purging valve, and a purging pipeline. The first purging valve, pressure regulating valve, and second purging valve are sequentially arranged on the purging pipeline. One end of the purging pipeline is connected to an external purging device. The gas-liquid separation sampling system includes a sampling cylinder, a gas-liquid separation tank, a transparent sampling bottle, quick connectors, and multiple control valves. The inlet and outlet of the sampling cylinder are respectively sealed to one end of the first pipeline and the second pipeline via corresponding quick connectors. The other ends of the first pipeline and the second pipeline are connected in parallel and sealed to the first inlet of the gas-liquid separation tank. The control valves are respectively installed on the first pipeline and the second pipeline. The outlet of the gas-liquid separator is sealed to the transparent sampling bottle through the third pipeline. The second inlet of the gas-liquid separator is sealed to one end of the medium pipeline. The medium pipeline is equipped with an inlet valve. The exhaust gas emission system includes a fourth pipeline, a fifth pipeline, a gas emission check valve, a liquid emission check valve, and a total discharge valve. One end of the fourth pipeline is connected to the transparent sampling bottle. The other end of the fourth pipeline is connected in parallel with the fifth pipeline and then connected to the exhaust gas collection device through the discharge pipeline. The gas emission check valve is installed on the fifth pipeline. The liquid emission check valve is installed on the fourth pipeline. The total discharge valve is correspondingly installed on the discharge pipeline.

2. The closed sampling device for gas-liquid dual sampling according to claim 1, characterized in that, It also includes a first pressure gauge and a second pressure gauge. The first pressure gauge is installed on the first pipeline, and the second pressure gauge is installed on the sampling cylinder. The first pressure gauge and the second pressure gauge are respectively sealed to the first pipeline and the sampling cylinder.

3. The closed sampling device for gas-liquid dual sampling according to claim 1, characterized in that, There are two quick connectors, which are respectively located near the inlet and outlet of the sampling cylinder. The two quick connectors are respectively sealed to the first pipeline, the second pipeline and the inlet and outlet of the corresponding sampling cylinder. The two quick connectors are self-closing quick connectors.

4. The closed sampling device for gas-liquid dual sampling according to claim 1, characterized in that, The transparent sampling bottle is equipped with a stainless steel protective sleeve with a viewing window. The mouth of the transparent sampling bottle is equipped with a double needle assembly and an automatic rebound rubber pad. The transparent sampling bottle is a glass bottle.

5. The closed sampling device for gas-liquid dual sampling according to claim 1, characterized in that, The plurality of control valves include a first control valve, a second control valve, and a third control valve. The first control valve and the second control valve are disposed on the first pipeline and the second pipeline, respectively, adjacent to the inlet and outlet of the sampling cylinder. The other ends of the first control valve and the second control valve are respectively sealed to the corresponding first pipeline and the second pipeline through the corresponding quick connectors. The third control valve is disposed on the second pipeline adjacent to the gas-liquid separator.

6. The closed sampling device for gas-liquid dual sampling according to claim 5, characterized in that, The second pipeline is a flexible hose made of metal.

7. The closed sampling device for gas-liquid dual sampling according to claim 1, characterized in that, The second purge valve is a one-way valve.

8. The closed sampling device for gas-liquid dual sampling according to claim 1, characterized in that, The gas-liquid separation sampling system includes a gas-liquid separation system, a gas sampling system, and a liquid separation system.

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