Vacuum liquid chemical pipeline sampling system

Abstract

The utility model provides a vacuum liquid chemical pipeline sampling system, and belongs to the technical field of pipeline sampling equipment. The sampling system comprises a pipeline, and a first valve, a sight glass and a second valve are sequentially arranged on the pipeline in the liquid conveying direction; a pressure regulating pipeline is communicated between the first valve and the sight glass; the pressure regulating pipeline is communicated with a first vacuum pipeline; a sampling pipeline is communicated between the sight glass and the second valve, the sampling pipeline is communicated with a second vacuum pipeline, a flushing pipeline and a purging pipeline, and one end, far away from the pipeline, of the sampling pipeline is communicated with a sampling box. The vacuum liquid chemical pipeline sampling system is simple in structure, convenient to sample, high in safety in the sampling process and free of sample residues in the sampling process.

Description

Technical Field

[0001] The present disclosure relates to the technical field of pipeline sampling equipment, and in particular to a vacuum liquid chemical pipeline sampling system. Background Art

[0002] Vacuum technology is used in chemical production processes such as vacuum distillation, vacuum concentration, and vacuum crystallization. The effectiveness of these processes requires product evaluation. To ensure consistent product quality, frequent sampling and analysis are required during the production process. However, since sampling occurs within vacuum pipelines, where the internal pressure is lower than the external atmospheric pressure, many sampling methods used in positive pressure pipelines cannot meet the sampling requirements under vacuum conditions.

[0003] Patent CN209589554U discloses a vacuum sampler, which includes a vacuum generator, a sample bottle, a sampling tube, a weight, and a connecting cavity. The connecting cavity is connected to the vacuum generator, one end of the sampling tube is connected to the connecting cavity, and the other end of the sampling tube extends into the sampling liquid. A switch valve is provided on the sampling tube, and a weight is provided at the lower end of the sampling tube. The sample bottle is sealed and connected to the bottom of the connecting cavity.

[0004] However, the vacuum sampler disclosed in patent CN209589554U has a complex structure, the sampling process is inconvenient, and the liquid sample is likely to remain in the connecting cavity after sampling, affecting the quality of the liquid sample for the next sampling. Therefore, after each sampling, the connecting cavity needs to be removed, cleaned, and then reinstalled, which is very troublesome, time-consuming and labor-intensive.

[0005] Therefore, an optimized and improved vacuum liquid chemical pipeline sampling system is provided. Utility Model Content

[0006] The purpose of the present disclosure is to overcome the above-mentioned deficiencies of the prior art and provide a vacuum liquid chemical pipeline sampling system to achieve a safe and convenient sampling process and avoid sample residue.

[0007] In order to achieve the above-mentioned purpose of the utility model, the present invention adopts the following technical solutions:

[0008] A vacuum liquid chemical pipeline sampling system, the sampling system comprising a pipeline, wherein a first valve, a sight glass, and a second valve are sequentially arranged on the pipeline along a liquid conveying direction;

[0009] A pressure regulating pipeline is connected between the first valve and the sight glass, and a first vacuum pipeline is connected to the pressure regulating pipeline;

[0010] A sampling pipeline is connected between the sight glass and the second valve, the sampling pipeline is connected to a second vacuum pipeline, a flushing pipeline, and a purge pipeline, and the sampling pipeline is connected to a sampling box at one end away from the pipeline.

[0011] In an exemplary embodiment of the present disclosure, one end of the pressure regulating pipeline away from the pipeline is connected to a gas source, and a third valve is provided on the pressure regulating pipeline.

[0012] In an exemplary embodiment of the present disclosure, one end of the first vacuum pipeline away from the pipeline is connected to a vacuum machine, and a fourth valve is provided on the first vacuum pipeline.

[0013] In an exemplary embodiment of the present disclosure, a fifth valve is provided on the sampling pipeline, and the second vacuum pipeline, the flushing pipeline, and the purge pipeline are connected between the fifth valve and the sampling box.

[0014] In an exemplary embodiment of the present disclosure, a branch pipe is connected between the fifth valve and the sampling box, the second vacuum line, the flushing line, and the purge line are connected to the branch pipe, and a sixth valve is provided on the branch pipe.

[0015] In an exemplary embodiment of the present disclosure, one end of the second vacuum pipeline away from the branch pipe is connected to a vacuum machine, and a seventh valve is provided on the second vacuum pipeline.

[0016] In an exemplary embodiment of the present disclosure, one end of the flushing pipeline away from the branch pipe is connected to a flushing source, and an eighth valve is provided on the flushing pipeline.

[0017] In an exemplary embodiment of the present disclosure, one end of the purge pipeline away from the branch pipe is connected to a gas source, and a ninth valve is provided on the purge pipeline.

[0018] In an exemplary embodiment of the present disclosure, the pressure regulating pipeline and the first vacuum pipeline are located on one side of the pipeline, and the sampling pipeline, the second vacuum pipeline, the flushing pipeline, and the purge pipeline are located on the other side of the pipeline.

[0019] In an exemplary embodiment of the present disclosure, the sampling box is protected by an inert gas;

[0020] The gas source is used to output inert gas.

[0021] Beneficial effects of the present disclosure:

[0022] The utility model provides a vacuum liquid chemical pipeline sampling system, which collects liquid through a sight glass, pressurizes the collected liquid through a pressure regulating pipeline, samples through a sampling pipeline and a sampling box, restores the vacuum state of the sight glass through a first vacuum pipeline, flushes the sampling pipeline through a flushing pipeline, purges the sampling pipeline through a purge pipeline, vacuumizes the sampling pipeline through a second vacuum pipeline, and pressurizes the inside of the sampling pipeline for protection through the purge pipeline. The utility model has a simple structure, a convenient sampling process, high safety, and improved sampling efficiency. No sample residue will be generated in the sampling pipeline after sampling, thereby improving the sampling quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0024] Figure 1 This is a schematic structural diagram of a vacuum liquid chemical pipeline sampling system in one embodiment of the present disclosure.

[0025] Description of reference numerals:

[0026] 1. Pipeline; 2. First valve; 3. Sight glass; 4. Second valve; 5. Pressure regulating pipeline; 6. First vacuum pipeline; 7. Sampling pipeline; 8. Second vacuum pipeline; 9. Flushing pipeline; 10. Purge pipeline; 11. Sampling box; 12. Gas source; 13. Third valve; 14. Vacuum machine; 15. Fourth valve; 16. Fifth valve; 17. Branch pipe; 18. Sixth valve; 19. Seventh valve; 20. Flushing source; 21. Eighth valve; 22. Ninth valve. DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent identical or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the figures are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0028] Although relative terms such as "upper" and "lower" are used in this specification to describe the relationship of one illustrated component to another, these terms are used herein for convenience only, such as in accordance with the orientation of the illustrations in the accompanying drawings. It will be understood that if the illustrated device were flipped upside down, the component described as "upper" would become the component "lower." When a structure is referred to as "on" another structure, this may mean that the structure is integrally formed with the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via the other structure.

[0029] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used only as labels and are not intended to limit the quantity of their objects.

[0030] The present disclosure provides a vacuum liquid chemical pipeline sampling system. Figure 1 The sampling system includes a pipeline 1, on which a first valve 2, a sight glass 3 and a second valve 4 are arranged in sequence along the liquid delivery direction; a pressure regulating pipeline 5 is connected between the first valve 2 and the sight glass 3, and a first vacuum pipeline 6 is connected to the pressure regulating pipeline 5; a sampling pipeline 7 is connected between the sight glass 3 and the second valve 4, and a second vacuum pipeline 8, a flushing pipeline 9 and a purge pipeline 10 are connected to the sampling pipeline 7, and a sampling box 11 is connected to the end of the sampling pipeline 7 away from the pipeline 1.

[0031] In the embodiment of the present disclosure, the vacuum liquid chemical pipeline sampling system consists of a pipeline 1 and a first valve 2, a sight glass 3, a second valve 4, a pressure regulating pipeline 5, a first vacuum pipeline 6, a sampling pipeline 7, a second vacuum pipeline 8, a flushing pipeline 9, a purge pipeline 10, and a sampling box 11 installed on the pipeline 1. The first valve 2, the sight glass 3, and the second valve 4 are installed on the pipeline 1 in sequence. The pressure regulating pipeline 5 is connected to the pipeline 1 between the first valve 2 and the sight glass 3, the first vacuum pipeline 6 is connected to the pressure regulating pipeline 5, the sampling pipeline 7 is connected to the pipeline 1 between the sight glass 3 and the second valve 4, and the second vacuum pipeline 8 is connected to the pressure regulating pipeline 5. The pipeline 8, the flushing pipeline 9, and the purge pipeline 10 are connected to the sampling pipeline 7 in sequence. The sight glass 3 is used to collect liquid chemicals. The pressure regulating pipeline 5 is used to pressurize the liquid in the sight glass 3. The sampling pipeline 7 and the sampling box 11 are used to sample the liquid in the sight glass 3. The first vacuum pipeline 6 is used to restore the vacuum state of the sight glass 3 after sampling. The flushing pipeline 9 is used to flush the sampling pipeline 7. The purge pipeline 10 is used to purge the sampling pipeline 7. The second vacuum pipeline 8 is used to vacuum the sampling pipeline 7. The purge pipeline 10 is used to pressurize the vacuumed sampling pipeline 7 for protection to complete the sampling work.

[0032] Compared with the existing vacuum sampler, the vacuum liquid chemical pipeline sampling system collects liquid through the sight glass, pressurizes the collected liquid through the pressure regulating pipeline, samples through the sampling pipeline and the sampling box, restores the vacuum state of the sight glass through the first vacuum pipeline, flushes the sampling pipeline through the flushing pipeline, purges the sampling pipeline through the purge pipeline, vacuumizes the sampling pipeline through the second vacuum pipeline, and pressurizes the inside of the sampling pipeline for protection through the purge pipeline. It has a simple structure, a convenient sampling process, high safety, and improved sampling efficiency. In addition, the sampling pipeline will not produce sample residue after sampling, thereby improving the sampling quality.

[0033] In one embodiment of the present disclosure, see Figure 1 The end of the pressure regulating line 5 away from the pipeline 1 is connected to the gas source 12, and a third valve 13 is provided on the pressure regulating line 5. Thus, the gas in the gas source 12 is delivered to the sight glass 3 through the pressure regulating line 5 and the third valve 13, thereby pressurizing the liquid in the sight glass 3. This creates a pressure difference between the sight glass 3 and the sampling line 7, facilitating sampling through the sampling line 7.

[0034] In one embodiment of the present disclosure, see Figure 1 The end of the first vacuum line 6 away from the pipe 1 is connected to a vacuum machine 14, and a fourth valve 15 is provided on the first vacuum line 6. In this way, the vacuum machine 14 is connected to the sight glass 3 through the first vacuum line 6 and the fourth valve 15, so that the sight glass 3 is evacuated and the vacuum state of the sight glass 3 is restored.

[0035] In one embodiment of the present disclosure, see Figure 1 , a fifth valve 16 is provided on the sampling line 7. Thus, the sampling line 7 is opened and closed by the fifth valve 16, so that sampling is conveniently performed through the sampling box 11.

[0036] Optionally, the second vacuum line 8, the flushing line 9, and the purge line 10 are connected between the fifth valve 16 and the sampling box 11. In this way, the sampling line 7 can be vacuumed, flushed, and purged to prevent sample residue from appearing in the sampling line 7.

[0037] In one embodiment of the present disclosure, see Figure 1 A branch pipe 17 connects the fifth valve 16 to the sampling box 11. The second vacuum line 8, flushing line 9, and purge line 10 are connected to the branch pipe 17, which is equipped with a sixth valve 18. This connects the second vacuum line 8, flushing line 9, and purge line 10 to the sampling line 7 via the branch pipe 17, making it easier for the second vacuum line 8, flushing line 9, and purge line 10 to clean the sampling line 7.

[0038] In one embodiment of the present disclosure, see Figure 1 The end of the second vacuum line 8 away from the branch pipe 17 is connected to the vacuum machine 14, and a seventh valve 19 is provided on the second vacuum line 8. In this way, the vacuum machine 14 is connected to the branch pipe 17 through the second vacuum line 8 and the seventh valve 19, and the sampling line 7 is vacuumed through the branch pipe 17.

[0039] In one embodiment of the present disclosure, see Figure 1 The end of the flushing line 9 away from the branch pipe 17 is connected to the flushing source 20, and an eighth valve 21 is provided on the flushing line 9. In this way, the liquid in the flushing source 20 is transported to the branch pipe 17 through the flushing line 9 and the eighth valve 21, thereby flushing the sampling line 7.

[0040] In one embodiment of the present disclosure, see Figure 1 The end of the purge line 10 away from the branch pipe 17 is connected to the gas source 12, and a ninth valve 22 is provided on the purge line 10. Thus, the gas in the gas source 12 is delivered to the branch pipe 17 through the purge line 10 and the ninth valve 22, thereby purging and pressurizing the sampling line 7 and preventing contamination inside the sampling line 7.

[0041] In one embodiment of the present disclosure, see Figure 1 The pressure regulating pipeline 5 and the first vacuum pipeline 6 are located on one side of the pipeline 1, and the sampling pipeline 7, the second vacuum pipeline 8, the flushing pipeline 9, and the purge pipeline 10 are located on the other side of the pipeline 1. In this way, a reasonable layout of the sampling system can be achieved, the structural complexity of the sampling system can be reduced, and the use of the sampling system can be facilitated.

[0042] In one embodiment of the present disclosure, an inert gas is used for protection in the sampling box 11. In this way, it is possible to prevent the chemicals in the sampling box 11 from being contaminated during sampling.

[0043] Optionally, the sampling box 11 is a glove box.

[0044] Optionally, the inert gas is nitrogen.

[0045] In one embodiment of the present disclosure, the gas source 12 is used to output an inert gas, thereby preventing liquid chemicals from being contaminated and improving sampling quality.

[0046] In one embodiment of the present disclosure, see Figure 1 The working process of the vacuum liquid chemical pipeline sampling system is briefly described as follows:

[0047] When the present invention is in use, first, during the process of conveying liquid in the pipeline 1, close the second valve 4 at the rear end of the sight glass 3, wait for the sight glass 3 to be filled with liquid chemicals, and then close the first valve 2 at the front end of the sight glass 3; open the third valve 13, start the gas source 12, and use the inert gas to pressurize the liquid in the sight glass 3, so that a pressure difference is formed between the sight glass 3 and the sampling pipeline 7, open the fifth valve 16, and operate the sampling box 11 to perform the sampling operation; after the sampling is completed, close the fifth valve 16 and the third valve 13; open the fourth valve 15, start the vacuum machine 14, evacuate the sight glass 3, and restore the vacuum state of the sight glass 3; close the fourth valve 15 and the vacuum machine 14, open the first valve 2 and the second valve 4, so that the pipeline 1 returns to normal production state; open the sixth valve 18 and the third valve 19, and then return to the normal production state. The eighth valve 21 starts the flushing source 20 and uses the solvent to flush the sampling pipeline 7 to prevent the residual chemicals from staying in the sampling pipeline 7 for a long time and clogging the sampling pipeline 7; after the flushing is completed, the flushing source 20 and the eighth valve 21 are closed, the ninth valve 22 is opened, the gas source 12 is started, the sampling pipeline 7 is purged, and the solvent is discharged; the sampling box 11 is closed, the ninth valve 22 and the gas source 12 are closed, the seventh valve 19 is opened, the vacuum machine 14 is started, the sampling pipeline 7 is vacuumed, and the residual trace solvent is removed; the vacuum machine 14 and the seventh valve 19 are closed, the ninth valve 22 is opened and the gas source 12 is started, and the sampling pipeline 7 is filled with inert gas for protection to prevent the inside of the sampling pipeline 7 from being contaminated; finally, the gas source 12, the ninth valve 22 and the sixth valve 18 are closed to complete the sampling work.

[0048] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A vacuum liquid chemical pipeline sampling system, characterized in that: The sampling system comprises a pipeline (1), on which a first valve (2), a sight glass (3) and a second valve (4) are sequentially arranged along a liquid delivery direction; A pressure regulating pipeline (5) is connected between the first valve (2) and the sight glass (3), and a first vacuum pipeline (6) is connected to the pressure regulating pipeline (5); A sampling line (7) is connected between the sight glass (3) and the second valve (4), and the sampling line (7) is connected to a second vacuum line (8), a flushing line (9), and a purge line (10). The end of the sampling line (7) away from the pipeline (1) is connected to a sampling box (11).

2. The vacuum liquid chemical pipeline sampling system according to claim 1, characterized in that: One end of the pressure regulating pipeline (5) away from the pipeline (1) is connected to a gas source (12), and a third valve (13) is provided on the pressure regulating pipeline (5).

3. The vacuum liquid chemical pipeline sampling system according to claim 1, characterized in that: One end of the first vacuum pipeline (6) away from the pipeline (1) is connected to a vacuum machine (14), and a fourth valve (15) is provided on the first vacuum pipeline (6).

4. The vacuum liquid chemical pipeline sampling system according to claim 1, characterized in that: A fifth valve (16) is provided on the sampling pipeline (7), and the second vacuum pipeline (8), the flushing pipeline (9), and the purge pipeline (10) are connected between the fifth valve (16) and the sampling box (11).

5. The vacuum liquid chemical pipeline sampling system according to claim 4, characterized in that: A branch pipe (17) is connected between the fifth valve (16) and the sampling box (11); the second vacuum line (8), the flushing line (9), and the purge line (10) are connected to the branch pipe (17); and a sixth valve (18) is provided on the branch pipe (17).

6. The vacuum liquid chemical pipeline sampling system according to claim 5, characterized in that: One end of the second vacuum pipeline (8) away from the branch pipe (17) is connected to a vacuum machine (14), and a seventh valve (19) is provided on the second vacuum pipeline (8).

7. The vacuum liquid chemical pipeline sampling system according to claim 5, characterized in that: One end of the flushing pipeline (9) away from the branch pipe (17) is connected to a flushing source (20), and an eighth valve (21) is provided on the flushing pipeline (9).

8. The vacuum liquid chemical pipeline sampling system according to claim 5, characterized in that: One end of the purge pipeline (10) away from the branch pipe (17) is connected to a gas source (12), and a ninth valve (22) is provided on the purge pipeline (10).

9. The vacuum liquid chemical pipeline sampling system according to claim 1, characterized in that: The pressure regulating pipeline (5) and the first vacuum pipeline (6) are located on one side of the pipeline (1), and the sampling pipeline (7), the second vacuum pipeline (8), the flushing pipeline (9), and the purge pipeline (10) are located on the other side of the pipeline (1).

10. The vacuum liquid chemical pipeline sampling system according to claim 2, characterized in that: The sampling box (11) is protected by an inert gas; The gas source (12) is used to output inert gas.

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