A pipeline closure sampler

Abstract

The utility model provides a pipeline airtight sampler, include: sampling pipeline, with first three -way valve who is connected with sampling pipeline, with the b end of first three -way valve is connected through first pipe line's connecting pipe, is located connecting pipe one end's three -way sampling valve, with the a end of three -way sampling valve is connected through second pipe line's second three -way valve, with the a end of second three -way valve is connected with backflow pipeline, sampling pipeline with one end of backflow pipeline all are connected to main pipeline, with the c end of first three -way valve, the c end of second three -way valve all are connected through the branch pipe's storage jar, with the storage jar is connected through L type pipeline's filter jar, with the filter jar is connected through third pipe line's nitrogen cylinder, through filter jar to the nitrogen gas in pipe line is handled, removed impurity and particulate matter, recycle nitrogen gas and use, improve the resource utilization of nitrogen gas.

Description

Technical Field

[0001] This utility model relates to the field of pipeline sampling technology, specifically to a closed pipeline sampler. Background Technology

[0002] In industrial production and chemical engineering, sampling and testing of liquid phases within pipelines is a crucial step. Traditional pipeline sampling methods typically employ direct orifice sampling or simple valve-type sampling devices. However, these methods suffer from drawbacks such as residual liquid phase samples affecting the accuracy of post-sampling testing, low resource utilization efficiency due to nitrogen purging, and environmental pollution caused by the volatilization of liquid phases during the sampling process.

[0003] For example, Chinese patent application publication CN213068311U discloses an atmospheric pressure closed sampling device, including a branch pipe, a three-way closed sampler installed on the branch pipe, and a valve installed on the branch pipe. By setting up the three-way closed sampler and the valve, the flow of the material to be sampled is controlled, achieving a closed effect. However, after each sampling, the device leaves sample residue in the pipeline, which can easily lead to sample contamination due to residue accumulation, affecting the accuracy of subsequent tests.

[0004] Chinese patent application publication CN112729960A discloses a mobile liquid closed sampler, including a sample container, a sample tube, multiple valves installed on the sample tube, and a nitrogen purging valve installed on a branch pipe. Nitrogen gas is introduced to remove sample residues by controlling the opening sequence of the valves. After purging, the nitrogen gas is directly discharged, failing to effectively purify and recycle the nitrogen gas, resulting in low resource utilization. Utility Model Content

[0005] This utility model provides a closed-loop sampler for pipelines to solve the problem of low resource utilization efficiency caused by the lack of nitrogen recycling in closed-loop samplers.

[0006] To address the aforementioned problems, this utility model provides a closed-loop sampler, comprising: a sampling pipe; a first three-way valve connected to the sampling pipe; a connecting pipe connected to end b of the first three-way valve via a first conduit; a three-way sampling valve located at one end of the connecting pipe; a second three-way valve connected to end a of the three-way sampling valve via a second conduit; a return pipe connected to end a of the second three-way valve; and one end of both the sampling pipe and the return pipe connected to a main pipe; a storage tank connected to ends c of both the first three-way valve and the second three-way valve via branch pipes; a filter tank connected to the storage tank via an L-shaped pipe; and a nitrogen cylinder connected to the filter tank via a third conduit.

[0007] The above scheme employs a closed sampling system, which avoids direct contact between the sample and the external environment during the sampling process. The combined use of the storage tank and the filter tank allows for the purging and collection of sample residues, providing a more accurate and reliable sample for subsequent analysis and testing. The nitrogen gas in the conduit is treated by the filter tank to remove impurities and particulate matter, and the recovered nitrogen gas is recycled, improving the resource utilization rate of nitrogen gas.

[0008] According to one embodiment of this utility model, a nitrogen purging valve is provided at the top of the connecting pipe, and one end of the nitrogen purging valve is connected to the nitrogen cylinder through a branch pipe. Nitrogen gas can be injected into the connecting pipe through the nitrogen purging valve to purge the sampling pipeline, effectively preventing the sample from being contaminated by impurities in the air during the sampling process and ensuring the purity of the sample.

[0009] According to one embodiment of the present invention, the third conduit is provided with a flow control valve. Through the above scheme, the flow rate of recovered nitrogen can be precisely adjusted to ensure the gas pressure balance in the pipeline. The recycling of nitrogen significantly reduces operating costs and improves overall efficiency.

[0010] According to one embodiment of the present invention, a desiccant layer is provided in the middle of the filter tank, and a screen is provided above the desiccant layer. Through the above scheme, the screen and the desiccant layer work together to remove impurities and moisture from nitrogen more efficiently, significantly improve the quality of the filtered nitrogen, and enable it to be repeatedly recycled, thereby improving resource utilization.

[0011] According to one embodiment of the present invention, the c end of the above-mentioned three-way sampling valve is provided with a sampling outlet pipe. Through the sampling outlet pipe, the operator can quickly and conveniently obtain samples without interrupting the main process. The high efficiency of the sampling process makes the overall production process smoother, thereby reducing downtime caused by sampling.

[0012] According to one embodiment of the present invention, one end of the L-shaped pipe is installed in the upper middle part of the storage tank. Since the pipe is installed in the upper middle part of the storage tank, gravity-assisted nitrogen flow recovery can be better utilized, reducing resistance during the transportation process, thereby improving the nitrogen transportation efficiency. At the same time, the pressure balance of the gas in the storage tank can be effectively maintained, avoiding pressure fluctuations caused by gas extraction, and ensuring the stable operation of the system.

[0013] According to one embodiment of the present invention, a viewing lens is installed on the side wall of the storage tank. Through the viewing lens, the operator can intuitively observe the situation inside the storage tank, including the liquid level and gas flow status, which facilitates real-time monitoring of the working status of the storage tank.

[0014] The technical advantages of this application are as follows: This application provides a closed-loop sampler that, through the combined use of a storage tank and a filter tank, ensures that sample residues are effectively purged and collected, providing more accurate and reliable samples for subsequent analysis and testing. The filter tank treats the nitrogen gas in the conduit, removing impurities and particulate matter, realizing the recycling of nitrogen gas, improving resource utilization, and reducing operating costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a closed-loop sampler for pipelines provided by this utility model.

[0016] Figure 2 This utility model provides Figure 1 Enlarged diagram of point A in the middle.

[0017] Explanation of reference numerals in the attached figures: 1. Sampling pipe; 2. First three-way valve; 3. First conduit; 4. Third conduit; 5. Flow control valve; 6. Nitrogen cylinder; 7. Nitrogen purging valve; 8. Connecting pipe; 9. Three-way sampling valve; 91. Sampling outlet pipe; 10. Second conduit; 11. Second three-way valve; 12. Storage tank; 13. Filter tank; 1301. Desiccant layer; 1302. Screen; 14. Return pipe; 15. Main pipe; 16. L-shaped pipe; 17. Viewing lens. Detailed Implementation

[0018] The following will be combined with the appendix Figures 1-2 The embodiments of the technical solution of this application are described in detail below. The following embodiments are only used to illustrate the technical solution of this application more clearly, and are therefore only examples and should not be used to limit the scope of protection of this application.

[0019] Example 1 Reference Figure 1 and Figure 2 This utility model provides a closed-loop sampler, comprising: a sampling pipe 1, a first three-way valve 2 connected to the sampling pipe 1, a connecting pipe 8 connected to the b end of the first three-way valve 2 via a first conduit 3, a three-way sampling valve 9 disposed at one end of the connecting pipe 8, a second three-way valve 11 connected to the a end of the three-way sampling valve 9 via a second conduit 10, a return pipe 14 connected to the a end of the second three-way valve 11, and one end of both the sampling pipe 1 and the return pipe 14 connected to a main pipe 15; a storage tank 12 connected to the c end of the first three-way valve 2 and the c end of the second three-way valve 11 via branch pipes, a filter tank 13 connected to the storage tank 12 via an L-shaped pipe 16, and a nitrogen cylinder 6 connected to the filter tank 13 via a third conduit 4.

[0020] The above scheme employs a closed sampling system, which avoids direct contact between the sample and the external environment during the sampling process. The combined use of storage tank 12 and filter tank 13 allows for the purging and collection of sample residues, providing a more accurate and reliable sample for subsequent analysis and testing. The nitrogen gas in the conduit is treated by filter tank 13 to remove impurities and particulate matter, and the recovered nitrogen gas is recycled, improving the resource utilization rate of nitrogen gas.

[0021] The top of the connecting pipe 8 is equipped with a nitrogen purging valve 7, one end of which is connected to the nitrogen cylinder 6 via a branch pipe. Nitrogen gas can be injected into the connecting pipe 8 through the nitrogen purging valve 7 to purge the sampling pipeline 1, effectively preventing the sample from being contaminated by impurities in the air during the sampling process and ensuring the purity of the sample.

[0022] The third conduit 4 is equipped with a flow control valve 5. Through the above scheme, the flow rate of recovered nitrogen can be precisely adjusted to ensure the gas pressure balance in the pipeline. The recycling of nitrogen significantly reduces operating costs and improves overall efficiency.

[0023] The filter tank 13 is provided with a desiccant layer 1301 in the middle and a screen 1302 above the desiccant layer 1301. Through the above scheme, the screen 1302 and the desiccant layer 1301 work together to remove impurities and moisture from nitrogen more efficiently, significantly improve the quality of the filtered nitrogen, and enable it to be repeatedly recycled, thereby improving resource utilization.

[0024] The above-mentioned three-way sampling valve 9 has a sampling outlet pipe 91 at end c. Through the sampling outlet pipe 91, the operator can quickly and conveniently obtain samples without interrupting the main process. The high efficiency of the sampling process makes the overall production process smoother and reduces downtime caused by sampling.

[0025] One end of the L-shaped pipe 16 is installed in the upper middle part of the storage tank 12. Since the pipe is installed in the upper middle part of the storage tank 12, gravity-assisted nitrogen flow recovery can be better utilized, reducing resistance during the transportation process and thus improving the nitrogen transportation efficiency. At the same time, the pressure balance of the gas in the storage tank 12 can be effectively maintained, avoiding pressure fluctuations caused by gas extraction and ensuring the stable operation of the system.

[0026] The storage tank 12 is equipped with a viewing lens 17 on its side wall. Through the viewing lens 17, the operator can intuitively observe the internal conditions of the storage tank 12, including the liquid level and gas flow status, which facilitates real-time monitoring of the working status of the storage tank 12.

[0027] Working principle: Before the initial sampling, the operator opens the nitrogen purging valve 7 to inject nitrogen into the nitrogen cylinder 6 to purge the sealed sampler, removing air and any possible impurities from the pipeline to ensure the purity of the sample during sampling. During sampling, the nitrogen purging valve 7 is closed, and ends a and b of the first three-way valve 2 are opened to connect the sampling pipeline 1 to the first conduit 3. Ends b and c of the three-way sampling valve 9 are opened, and the sample in the sampling pipeline 1 flows through the connecting pipe 8 and finally into the sample bottle from the sampling outlet pipe 91. After sampling, end c of the three-way sampling valve 9 is closed, end a of the three-way sampling valve 9 is opened, and ends a and b of the second three-way valve 11 are opened, connecting the second conduit 10 to the return pipeline 14. Excess sample flows into the main pipeline 15 sequentially through the second conduit 10, the second three-way valve 11, and the return pipeline 14. After sampling, the a end of the first three-way valve 2 is closed and the c end is opened, and the a end of the second three-way valve 11 is closed and the c end is opened, so that the first three-way valve 2 and the second three-way valve 11 are connected to the storage tank 12, so that the first conduit 3 is connected and the second conduit 10 is connected to the storage tank 12. The nitrogen purging valve 7 is opened, and nitrogen is injected again to purge the residual sample in the first conduit 3, the connecting pipe 8, and the second conduit 10 back to the storage tank 12. The nitrogen in the storage tank 12 enters the filter tank 13 through the third conduit 4. After passing through the screen 1302 to filter particles and impurities, it passes through the desiccant layer 1301 to remove moisture and other small amounts of liquid phase impurities, resulting in purified nitrogen. The purified nitrogen flows into the nitrogen cylinder 6, and the flow rate is adjusted by the flow control valve 5 to ensure the gas pressure balance in the pipeline and to circulate it for reuse, thereby reducing operating costs. After the purging process is completed, the collected residual samples are stored in storage tank 12. The storage tank is designed to hold a certain amount of residual samples. If the amount of residual samples is large, they can be recycled into the main pipeline 15 and used in the production process.

[0028] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A closed-loop sampler for pipelines, comprising: The sampling pipe (1), the first three-way valve (2) connected to the sampling pipe (1), the connecting pipe (8) connected to the b end of the first three-way valve (2) through the first conduit (3), the three-way sampling valve (9) located at one end of the connecting pipe (8), the second three-way valve (11) connected to the a end of the three-way sampling valve (9) through the second conduit (10), and the return pipe (14) connected to the a end of the second three-way valve (11), with one end of the sampling pipe (1) and the return pipe (14) both connected to the main pipe (15); The feature is that the storage tank (12) is connected to the c end of the first three-way valve (2) and the c end of the second three-way valve (11) through a branch pipe, the filter tank (13) is connected to the storage tank (12) through an L-shaped pipe (16), and the nitrogen cylinder (6) is connected to the filter tank (13) through a third conduit (4).

2. The closed-loop pipe sampler according to claim 1, characterized in that, The top of the connecting pipe (8) is provided with a nitrogen purging valve (7), and one end of the nitrogen purging valve (7) is connected to the nitrogen cylinder (6) through a branch pipe.

3. The closed-loop pipe sampler according to claim 1, characterized in that, The third conduit (4) is equipped with a flow control valve (5).

4. The closed-loop pipe sampler according to claim 1, characterized in that, The filter tank (13) has a desiccant layer (1301) in the middle, and a screen (1302) is provided above the desiccant layer (1301).

5. The closed-loop pipe sampler according to claim 1, characterized in that, The three-way sampling valve (9) is provided with a sampling outlet pipe (91) at its c end.

6. The closed-loop pipe sampler according to claim 1, characterized in that, One end of the L-shaped pipe (16) is installed in the upper middle part of the storage tank (12).

7. The closed-loop pipe sampler according to claim 1, characterized in that, A viewing lens (17) is installed on the side wall of the storage tank (12).

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