Detection pipeline system and electrolysis equipment gas detection device

Abstract

The utility model discloses a detection pipeline system and an electrolysis equipment gas detection device, and relates to the technical field of sample detection. The detection pipeline system comprises a sample pretreatment pipe and a discharge pipe, one end of the sample pretreatment pipe is communicated with the main pipeline, the other end of the sample pretreatment pipe is communicated with an analyzer, and a pressure reducing valve is arranged on the sample pretreatment pipe; and the discharge pipe is communicated with the sample pretreatment pipe, is positioned between the main pipeline and the analyzer, and is used for discharging the fluid transmitted from the sample pretreatment pipe to the discharge pipe. The discharge pipe is communicated with the sample pretreatment pipe, part of fluid is discharged and released through the discharge pipe, the other part of fluid is conveyed to the analyzer for detection, the volume of the other part of fluid is reduced, and the conveying time is shortened, so that the fluid quickly reaches the analyzer, and the sample detection time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of sample detection, and particularly relates to a detection pipeline system and a gas detection device for an electrolysis device. Background Art

[0002] In the industrial production process, in order to monitor the quality of products, samples are usually taken for analysis and detection to achieve supervision. For example, when the produced products are transported in a pipeline in a fluid form, the fluid can be transported to an analyzer for analysis and detection. When the transportation pipeline is long, it is difficult to feed back the analysis results in real time.

[0003] For example, during the process of hydrogen production by water electrolysis, it is necessary to detect the purity of the generated oxygen and hydrogen. The oxygen-in-hydrogen analyzer and the hydrogen-in-oxygen analyzer are key control devices and detection elements for safety assurance in hydrogen production by water electrolysis. The rapidity and reliability of oxygen-in-hydrogen and hydrogen-in-oxygen analysis restrict the safety of the hydrogen production - gas-liquid separation and purification unit by electrolyzing water.

[0004] At present, due to layout reasons, the sampling points of oxygen-in-hydrogen and hydrogen-in-oxygen are usually far from the pretreatment panels of oxygen-in-hydrogen and hydrogen-in-oxygen, resulting in too long sampling pipelines in front of the pretreatment panels of oxygen-in-hydrogen and hydrogen-in-oxygen, and the response time of the analyzer lags. Summary of the Utility Model

[0005] The main purpose of the utility model is to propose a detection pipeline system and a gas detection device for an electrolysis device, aiming to shorten the analysis and test time of samples.

[0006] To achieve the above purpose, the detection pipeline system proposed by the utility model includes:

[0007] A sample pretreatment pipe, one end of the sample pretreatment pipe is connected to the main pipeline, the other end of the sample pretreatment pipe is connected to the analyzer, and a pressure reducing valve is provided on the sample pretreatment pipe;

[0008] And a drain pipe, the drain pipe is connected to the sample pretreatment pipe and is located between the main pipeline and the analyzer, and is used for discharging the fluid transmitted from the sample pretreatment pipe to the drain pipe.

[0009] Optionally, at least one first control valve is provided on the drain pipe.

[0010] Optionally, the first control valve includes a first globe valve and / or a first ball valve.

[0011] Optionally, a first flow meter is further provided on the drain pipe.

[0012] Optionally, the drain pipe is located between the main pipeline and the pressure reducing valve.

[0013] Optionally, the drain pipe is arranged adjacent to the pressure reducing valve.

[0014] Optionally, a filter and a drying tube are provided between the pressure reducing valve and the analyzer;

[0015] A calibration tube is also provided between the pressure reducing valve and the filter;

[0016] A third flowmeter is provided on the outlet pipeline of the analyzer.

[0017] Optionally, a solenoid valve is provided on the sample pretreatment tube, and the solenoid valve is located between the main pipeline and the drain pipe;

[0018] A second stop valve and a second ball valve are provided on the sample pretreatment tube, and the second stop valve and the second ball valve are located between the main pipeline and the drain pipe;

[0019] A joint is provided on the sample pretreatment tube.

[0020] Optionally, the sample pretreatment tube includes a pressure guiding tube and a sampling tube. One end of the pressure guiding tube is communicated with the main pipeline, the other end of the pressure guiding tube is communicated with the sampling tube, and the end of the sampling tube facing away from the pressure guiding tube is communicated with the analyzer;

[0021] The solenoid valve and the second stop valve are provided on the pressure guiding tube, and the second stop valve is provided between the main pipeline and the solenoid valve;

[0022] The drain pipe, the pressure reducing valve, and the second ball valve are provided on the sampling tube, and the drain pipe is located between the second ball valve and the pressure reducing valve;

[0023] The joint is provided between the pressure guiding tube and the sampling tube.

[0024] Optionally, the pressure guiding tube includes a vertical pipe section, an inclined pipe section, and a horizontal pipe section that are sequentially communicated. One end of the vertical pipe section facing away from the inclined pipe section is communicated with the main pipeline, and one end of the horizontal pipe section facing away from the inclined pipe section is communicated with the sampling tube.

[0025] Optionally, the length of the pressure guiding tube is greater than or equal to 3m.

[0026] Optionally, the present application further provides an electrolysis equipment gas detection device, including the detection pipeline system as described above.

[0027] The detection pipeline system of the present application includes a sample pretreatment tube and a drain pipe. One end of the sample pretreatment tube is communicated with the main pipeline, the other end of the sample pretreatment tube is communicated with the analyzer, and a pressure reducing valve is provided on the sample pretreatment tube; the drain pipe is communicated with the sample pretreatment tube and is located between the main pipeline and the analyzer for discharging the fluid transmitted from the sample pretreatment tube to the drain pipe.

[0028] Specifically, the drain pipe is connected to the sample pretreatment pipe. The drain pipe is located between the main pipeline and the analyzer and is used to discharge the fluid transmitted from the sample pretreatment pipe to the drain pipe. After the fluid flows out of the main pipeline, it reaches the sample pretreatment pipe. In the sample pretreatment pipe, the fluid is divided into two parts. One part is discharged and released through the drain pipe, and the other part reaches the analyzer through the outlet end of the sample pretreatment pipe, so as to reduce the transportation time of the fluid and further improve the speed of analysis feedback. Among them, a pressure reducing valve is provided on the sample pretreatment pipe to adjust the pressure of the fluid on the sample pretreatment pipe. For example, when the pressure of the fluid in the sample pretreatment pipe is relatively high, the pressure of the fluid can be reduced through the pressure reducing valve to protect the analyzer. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0030] Figure 1 It is a schematic structural diagram of an embodiment of the detection pipeline system provided by the present invention;

[0031] Figure 2 It is a schematic structural diagram of another embodiment of the detection pipeline system provided by the present invention;

[0032] Figure 3 It is a schematic structural diagram of still another embodiment of the detection pipeline system provided by the present invention;

[0033] Figure 4 It is a schematic structural diagram of yet another embodiment of the detection pipeline system provided by the present invention;

[0034] Figure 5 It is a schematic structural diagram of yet another embodiment of the detection pipeline system provided by the present invention;

[0035] Figure 6 It is a schematic structural diagram of the arrangement of the pressure guiding pipe in the sample pretreatment pipe in an embodiment of the present invention.

[0036] Explanation of the Reference Numerals in the Drawings:

[0037] 10. Sample pretreatment tube; 10a. Pressure guiding tube; 10b. Sampling tube; 101. Vertical pipe section; 102. Inclined pipe section; 103. Horizontal pipe section; 11. Pressure reducing valve; 12. Solenoid valve; 13. Second stop valve; 14. Second ball valve; 15. Connector; 20. Main pipeline; 30. Analyzer; 31. Filter; 32. Drying tube; 33. Calibration tube; 331. Third stop valve; 34. Third flowmeter; 50. Drain pipe; 51. First stop valve; 52. First flowmeter; 53. First ball valve.

[0038] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0040] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0041] In addition, if there are descriptions such as "first" and "second" in the embodiments of the present utility model, the descriptions of "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0042] In the industrial production process, in order to monitor the quality of products, samples are usually taken for analysis and testing to achieve supervision. For example, when the produced products are transported in a pipeline in a fluid form, the fluid can be transported to an analyzer for analysis and testing. When the transport pipeline is long, it is difficult to provide real-time feedback of the analysis results.

[0043] For example, in the process of hydrogen production by water electrolysis, it is necessary to detect the purity of the generated oxygen and hydrogen. The hydrogen-in-oxygen analyzer and the oxygen-in-hydrogen analyzer are key control devices and detection elements for ensuring the safety of hydrogen production by water electrolysis. The rapidity and reliability of hydrogen-in-oxygen and oxygen-in-hydrogen analysis restrict the safety of the hydrogen production - gas-liquid separation and purification unit by electrolyzing water.

[0044] Currently, due to layout reasons, the sampling points of hydrogen-in-oxygen and oxygen-in-hydrogen are usually far from the pretreatment panels of hydrogen-in-oxygen and oxygen-in-hydrogen, resulting in too long sample pretreatment pipelines in front of the pretreatment panels of hydrogen-in-oxygen and oxygen-in-hydrogen, and the response time of the analyzer lags.

[0045] To solve the above technical problems, the present utility model proposes a detection pipeline system, which includes a sample pretreatment pipe 10 and a drain pipe 50. One end of the sample pretreatment pipe 10 is connected to the main pipeline 20, the other end of the sample pretreatment pipe 10 is connected to the analyzer 30, and a pressure reducing valve 11 is provided on the sample pretreatment pipe 10; the drain pipe 50 is connected to the sample pretreatment pipe 10 and is located between the main pipeline 20 and the analyzer 30 for discharging the fluid transmitted from the sample pretreatment pipe 10 to the drain pipe 50.

[0046] It can be understood that the sample pretreatment pipe 10 of the present application is used to guide the flow path of the fluid.

[0047] The sample pretreatment pipe 10 can be a section of pipeline, or a pipeline formed by connecting multiple sections of pipelines through joints. For example, a section of pipeline led out from the sampling port of the main pipeline 20 can be called the sample pretreatment pipe 10, and the part of the pipeline where the inlet end of the analyzer 30 is located can also be called the sample pretreatment pipe 10.

[0048] It can be understood that the main pipeline 20 is used to transport the fluid sample to be detected. For example, the fluid includes hydrogen or oxygen.

[0049] The drain pipe 50 is used to discharge and release the fluid transported to the drain pipe 50.

[0050] The detection pipeline system includes the sample pretreatment pipe 10 and the drain pipe 50. The main pipeline 20 is connected to the sample pretreatment pipe 10, and the sample pretreatment pipe 10 is connected to the analyzer 30. In this way, the fluid to be detected is introduced into the analyzer 30 through the sample pretreatment pipe 10 for detection.

[0051] Considering that during the fluid transportation process, the fluid flows from the main pipeline 20 through the sample pretreatment pipe 10 and then to the analyzer 30, experiencing a certain length of path. It takes a certain amount of time for the fluid to reach the analyzer 30 for detection during this process. If this time is relatively long, the analyzer 30 cannot timely feedback the analysis situation of the fluid, resulting in a lag in the response time of the analyzer, which is not conducive to timely monitoring of the fluid situation.

[0052] To solve the above problems, the drain pipe 50 is connected to the sample pretreatment pipe 10, so that part of the fluid is discharged and released through the drain pipe 50, and the other part of the fluid is transported to the analyzer 30 for detection. Since the volume of the other part of the fluid decreases, the transportation time is shortened, thereby enabling the fluid to quickly reach the analyzer 30 and shortening the detection time of the sample.

[0053] Specifically, as Figure 1 shown, the drain pipe 50 is connected to the sample pretreatment pipe 10. The drain pipe 50 is located between the main pipeline 20 and the analyzer 30 and is used to discharge the fluid transmitted from the sample pretreatment pipe 10 to the drain pipe 50. After the fluid flows out of the main pipeline 20, it reaches the sample pretreatment pipe 10, and is divided into two streams of fluid in the sample pretreatment pipe 10. One part is discharged and released through the drain pipe 50, and the other part reaches the analyzer 30 through the outlet end of the sample pretreatment pipe 10, realizing the reduction of the fluid transportation time and further improving the speed of analysis feedback. Among them, a pressure reducing valve 11 is provided on the sample pretreatment pipe 10 to adjust the pressure of the fluid on the sample pretreatment pipe 10. For example, when the pressure of the fluid in the sample pretreatment pipe 10 is relatively high, the pressure of the fluid can be reduced through the pressure reducing valve 11 to protect the analyzer 30.

[0054] In one embodiment, at least one first control valve is provided on the drain pipe 50.

[0055] Considering that the sampling points of the fluid to be detected are different, the distances between different sample pretreatment pipelines and the analyzer are different. For example, when the sample pretreatment pipe is relatively short, the amount of fluid discharged and released by the drain pipe 50 can be reduced. When the sample pretreatment pipe is relatively long, more fluid needs to be discharged through the drain pipe 50. Then, at least one first control valve can be provided on the drain pipe 10 to control the opening of the drain pipe 10 and the opening degree of the drain pipe 10 to adjust the fluid discharge amount.

[0056] In one embodiment, the first control valve includes a first stop valve 51 and / or a first ball valve 53; a first flow meter 52 is also provided on the drain pipe 50.

[0057] In one embodiment, as Figure 3 shown, the first control valve includes a first stop valve 51. At this time, the size of the discharge port of the drain pipe 10 can be adjusted through the first stop valve 51; in another embodiment, as Figure 2As shown, the first control valve includes a first ball valve 53, that is, the size of the discharge port of the discharge pipe 10 can also be realized by the first ball valve 53; in another embodiment, as Figure 4 As shown, the first control valve includes a first globe valve 51 and a first ball valve 53. The first ball valve 53 can be used to open and close the discharge pipe 10, and the first globe valve 51 can be used to control the size of the opening of the discharge port.

[0058] In still another embodiment, as Figure 5 As shown, a first flowmeter 52 can also be provided on the discharge pipe 50 to monitor the size of the discharged flow rate. At this time, the first control valve and the first flowmeter 52 can be used in cooperation to control the discharged flow rate. Specifically, the opening degree of the first control valve can be adjusted according to the flow rate display of the first flowmeter 52. By the cooperation of the first control valve and the first flowmeter 52, the discharged fluid flow rate can be accurately controlled, and then the time for the fluid to pass through the diversion pipe 10 can be controlled as needed, so as to feedback the analysis result of the analyzer 30 in real time.

[0059] In one embodiment, the discharge pipe 50 is located between the main pipe 20 and the pressure reducing valve 11.

[0060] It can be understood that when the opening size of the discharge pipe 50 is fixed, the greater the pressure of the fluid, the faster the fluid discharge speed, and then the amount of fluid flowing through the downstream of the sample pretreatment pipe 10 will decrease. At the same time, it can also be known that when the pressure reducing valve 11 reduces the pressure, the fluid pressure upstream of the pressure reducing valve 11 will be greater than the fluid pressure downstream of the pressure reducing valve 11. In order to increase the discharge speed of the fluid in the discharge pipe 10, the discharge pipe 50 is located between the main pipe 20 and the pressure reducing valve 11, that is, the discharge pipe 50 is located upstream of the pressure reducing valve 11. In this way, the fluid is discharged from the discharge pipe 10 before the fluid is decompressed, which is beneficial to the rapid discharge of the fluid from the discharge pipe 10, increases the discharge speed of the fluid, enables a large amount of fluid to be quickly discharged when the pipeline of the sample pretreatment pipe 10 is long, reduces the volume of the fluid flowing to the analyzer 30, shortens the time for the fluid to reach the analyzer 30, and improves the feedback time of the analyzer 30 for fluid detection.

[0061] In one embodiment, the discharge pipe 50 is arranged adjacent to the pressure reducing valve 11.

[0062] Generally, the pressure reducing valve 11 needs to be operated according to the actual situation to adjust to an appropriate pressure, and the discharge pipe 50 also needs to be opened or opened to a certain degree according to the actual needs to discharge the fluid. That is, in certain situations, both the discharge pipe 50 and the pressure reducing valve 11 need to be operated by personnel. For centralized operation, the discharge pipe 50 and the pressure reducing valve 11 are arranged adjacent to each other, so that the operation area is centrally arranged, which is convenient for personnel operation.

[0063] In one embodiment, a filter 31 and a drying tube 32 are provided between the pressure reducing valve 11 and the analyzer 30; a calibration tube 33 is further provided between the pressure reducing valve 11 and the filter 31; a third flowmeter 34 is provided in the outlet pipeline of the analyzer 30.

[0064] It can be understood that before the analyzer 30 performs analysis, the sample needs to be pretreated so that the sample enters the analyzer 30 in a suitable state for analysis, improving the accuracy of the analysis and ensuring the safety of the analyzer 30.

[0065] For this purpose, a filter 31 and a drying tube 32 are provided between the pressure reducing valve 11 and the analyzer 30; that is to say, the sample pretreatment tube 10 includes a filter 31 and a drying tube 32, which are used to remove impurities in the fluid and dry the fluid, so that the fluid becomes a dry and highly pure fluid after passing through the filter 31 and the drying tube 32, and then enters the analyzer 30 for analysis and detection.

[0066] In order to monitor the flow rate of the fluid passing through the analyzer 30, a third flowmeter 34 can be provided in the outlet pipeline of the analyzer 30 to monitor the flow rate of the fluid passing through the analyzer in real time.

[0067] Under normal circumstances, the analyzer 30 needs to be calibrated to meet the normal analysis and testing requirements. A calibration tube 33 is further provided between the pressure reducing valve 11 and the filter 31. A standard sample is introduced into the analyzer 30 to test whether the analyzer 30 is working properly and calibrate it. A third stop valve 331 is also provided on the pipeline where the calibration tube 33 is located to control the opening or closing of the pipeline where the calibration tube 33 is located.

[0068] In one embodiment, a solenoid valve 12 is provided on the sample pretreatment tube 10, and the solenoid valve 12 is located between the main pipeline 20 and the discharge pipe 50; a second stop valve 13 and a second ball valve 14 are provided on the sample pretreatment tube 10, and the second stop valve 13 and the second ball valve 14 are located between the main pipeline 20 and the discharge pipe 50; a joint 15 is provided on the sample pretreatment tube 10.

[0069] Considering that the pipeline of the sample pretreatment tube 10 needs to be opened when there is an analysis requirement, and when there is no analysis requirement, the pipeline of the sample pretreatment tube 10 needs to be closed to prevent the fluid coming from the main pipeline 20 from directly entering the analyzer 30. In one embodiment, a solenoid valve 12 can be provided on the sample pretreatment tube 10. The solenoid valve 12 is located between the main pipeline 20 and the drain pipe 50 to control the opening of the sample pretreatment tube 10, or to control the opening degree of the sample pretreatment tube 10. Moreover, the solenoid valve 12 can also adjust the pressure of the flow rate and the fluid flow direction. When the flow rate and the flow direction of the fluid on the pipeline of the sample pretreatment tube 10 need to be adjusted, the solenoid valve 12 can be adjusted according to actual needs; In another embodiment, a second stop valve 13 and a second ball valve 14 are provided on the sample pretreatment tube 10. The second stop valve 13 and the second ball valve 14 are located between the main pipeline 20 and the drain pipe 50 to realize the opening and the opening size of the sample pretreatment tube 10; In yet another embodiment, according to the installation of the actual pipeline or the replacement requirement of the pipe diameter, a connector 15, such as a reducer connector, can also be provided on the sample pretreatment tube 10 to connect pipelines with different pipe diameters.

[0070] In one embodiment, the sample pretreatment tube includes a pressure guiding tube 10a and a sampling tube 10b. One end of the pressure guiding tube 10a is communicated with the main pipeline 20, the other end of the pressure guiding tube 10a is communicated with the sampling tube 10b, and the end of the sampling tube 10b away from the pressure guiding tube 10a is communicated with the analyzer; The solenoid valve 12 and the second stop valve 13 are provided on the pressure guiding tube 10a, and the second stop valve 13 is provided between the main pipeline 20 and the solenoid valve 12; The drain pipe 50, the pressure reducing valve 11, and the second ball valve 14 are provided on the sampling tube 10b, and the drain pipe 50 is located between the second ball valve 14 and the pressure reducing valve 11; The connector 15 is provided between the pressure guiding tube 10a and the sampling tube 10b.

[0071] When the distance between the main pipeline 20 and the analyzer 30 is relatively far, it is necessary to lead the fluid to the analyzer 30. The sample pretreatment tube includes a pressure guiding tube 10a and a sampling tube 10b. It can be understood that the pressure guiding tube 10a leads out from the main pipeline 20, and the fluid in the main pipeline 20 is introduced into the sampling tube 10b through the pressure guiding tube 10a, and the fluid reaches the analyzer 30 through the sampling tube 10b for analysis and testing.

[0072] In one embodiment, as Figure 5 shown, the solenoid valve 12 and the second stop valve 13 are provided on the pressure guiding tube 10a, and the second stop valve 13 is provided between the main pipeline 20 and the solenoid valve 12; In this way, it is convenient to control the opening and closing of the pipeline of the pressure guiding tube 10a, or to control the flow rate and the flow direction of the fluid.

[0073] The drain pipe 50, the pressure reducing valve 11, and the second ball valve 14 are provided on the sampling pipe 10b, and the drain pipe 50 is located between the second ball valve 14 and the pressure reducing valve 11; it is beneficial to control the opening and closing of the pipeline of the sampling pipe 10b through the second ball valve 14, facilitating the operation of the drain pipe 50 and the pressure reducing valve 11.

[0074] The joint 15 is provided between the pressure guiding pipe 10a and the sampling pipe 10b; considering that the pressure guiding pipe 10a and the sampling pipe 10b need to be connected, the two are connected through the joint 15.

[0075] In one embodiment, the pressure guiding pipe 10a includes a vertical pipe section 101, an inclined pipe section 102, and a horizontal pipe section 103 that are sequentially connected. One end of the vertical pipe section 101 away from the inclined pipe section 102 is connected to the main pipeline 20, and one end of the horizontal pipe section 103 away from the inclined pipe section 102 is connected to the sampling pipe 10b.

[0076] Considering that the fluid includes a gas-liquid mixture, and when the analyzer 30 needs to detect the gas component, the liquid component and the gas component can be preliminarily separated by adjusting the pipeline settings. Specifically, as Figure 6 shown, the sample pretreatment pipe 10 includes a vertical pipe section 101, an inclined pipe section 102, and a horizontal pipe section 103 that are sequentially connected. One end of the vertical pipe section 101 away from the inclined pipe section 102 is connected to the main pipeline 20, and one end of the horizontal pipe section 103 away from the inclined pipe section 102 is connected to the sampling pipe 10b. That is, the gas-liquid mixed fluid coming from the main pipeline 20 passes through the vertical pipe section 101, the inclined pipe section 102, and the horizontal pipe section 103 in sequence and then reaches the sampling pipe 10b and then reaches the analyzer 30. During the process of the gas-liquid mixed fluid passing through the vertical pipe section 101, the inclined pipe section 102, and the horizontal pipe section 103, due to the gravity of the liquid itself, it will flow back to the main pipeline 20, or the liquid reaching the horizontal pipe section 103 is reduced by the blockage of the inclined pipe section 102, realizing the preliminary separation of gas and liquid.

[0077] In one embodiment, the length of the pressure guiding pipe 10a is greater than or equal to 3m.

[0078] During the process of analyzing the products of water electrolysis for hydrogen production, if the oxygen content in hydrogen and the hydrogen content in oxygen are not properly controlled, there may be some safety risks. Therefore, it is necessary to analyze the oxygen content in hydrogen and the hydrogen content in oxygen in real time, and give corresponding measures to the risks in a timely manner according to the analysis results to avoid accidents. Among them, the control of the overall analysis time is relatively crucial. When the sample pretreatment pipe 10 is short, the overall analysis time is short and can provide real-time feedback. When the sample pretreatment pipe 10 is long, for example, when the length of the pressure guiding pipe 10a is greater than or equal to 3m or more, the detection pipeline system of the present application needs to be used to improve the overall analysis speed and shorten the analysis time. For example, the response time is controlled within 30s so as to make corresponding measures in time when a risk situation is found.

[0079] In one embodiment, the drain pipe 10 is not provided in the sample pretreatment pipe 10. The structure of this pretreatment process is relatively simple. When the fluid sampling point and the pretreatment device of the analyzer 30 are arranged nearby, there is no significant risk. However, for every additional 10 meters of the pressure guiding pipe 10a before the pretreatment device, the response time of the analyzer 30 will lag by 3 minutes. Such a long lag time poses a great risk to the safety of the electrolytic water hydrogen production - gas - liquid separation and purification unit.

[0080] In another embodiment, the solution of the present application is adopted, that is, a drain pipe 50 is further provided on the sample pretreatment pipe 10. The opening degree of the first stop valve 51 on the pipeline of the drain pipe 50 is adjusted according to the distance between the analyzer 30 and the pipeline sampling port, and in combination with the value of the first flowmeter 52, for example, a rotameter, so as to achieve the purpose of rapid response of the analyzer 30.

[0081] The specific installation scheme is as follows: An interface is provided from the main pipeline 20, and this interface is used to connect the pressure guiding pipe 10a. The pressure guiding pipe 10a extends upward for a certain distance to form a vertical pipe section, and then an inclined pipe section is set obliquely. The included angle between the inclined pipe section and the direction of gravity is 7.5°. Then a horizontal pipe section is set horizontally. During the specific setting process, a pipe bender is used to adjust the laying path of the pressure guiding pipe 10a. A ferrule stop valve can be installed on the pressure guiding pipe 10a, and then a pipe - connection type direct - acting solenoid valve is installed. The pressure guiding pipe 10a is connected into the inlet of the direct - acting solenoid valve and led out from the outlet of the direct - acting solenoid valve. After the pressure guiding pipe 10a is led out from the outlet of the pipe - connection type direct - acting solenoid valve, it continues to be laid for 0.3 to 0.5 meters, and a ferrule reducing joint is installed to transfer and connect the pipeline for connecting the analyzer. Then a ferrule ball valve and a ferrule tee joint are installed. The two outlets of the ferrule tee joint are respectively connected to a pressure reducing valve and a drain pipe. The downstream of the pressure reducing valve is connected to a filter, a drying pipe, and an analyzer. A structure of a ferrule ball valve, a ferrule stop valve, and a float flowmeter is installed on the pipeline of the drain pipe 50. The opening degree of the ferrule stop valve is adjusted according to the length of the sample pretreatment pipe, and the flow rate of the float flowmeter is compared for judgment.

[0082] Specifically, taking the pressure guiding pipe 10a with a length of 20m as an example, its medium operating pressure is 1.8 Mpa(G), the operating temperature is 40°C, the medium is hydrogen, the outer diameter of the pipeline is 10.2mm, and the inner diameter is 6mm.

[0083] The lag time for the conveyance of the hydrogen sample is T = T1 + T2 = V1 / F1 + F2 + V2 / F2; in the above formula:

[0084] T ------- Sample lag time; T1 ------- Time taken from the inlet end of the pressure guiding pipe 10a in the sample pretreatment pipe to the pressure reducing valve section; T2 ------- Time taken from the pressure reducing valve to the analyzer section; V1 ------- Sample volume in section T1; V2 ------- Sample volume in section T2; F1 + F2 ------- Sample flow rate in section V1; F2 ------- Sample flow rate in section V2; V = 1 / 4πd2L * 1.5 + V2; d ------- Inner diameter of the sample transmission pipeline; L ------- Pipeline length; When the bleed pipe is not added, taking the example of consuming 500 ml per minute in pretreatment, the response time of the analyzer sensor is about 3 min; when the bleed pipe is added and the rotor flowmeter range is adjusted to 1500 ml / min, its response time is corrected to about 40 s.

[0085] This solution solves the problem that due to layout reasons, the sample pretreatment pipeline in front of the pretreatment instrument for hydrogen in oxygen and oxygen in hydrogen is too long, resulting in a lag in the response time of the analyzer, improves the response time of the hydrogen in oxygen and oxygen in hydrogen analyzers, and ensures the safety of the electrolytic water hydrogen production - gas - liquid separation and purification unit.

[0086] In one embodiment, the present application further provides a gas detection device for an electrolysis device, including the detection pipeline system as described above.

[0087] Since the gas detection device for the electrolysis device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here.

[0088] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A pipeline detection system, characterized in that, Including: A sample pretreatment tube (10), one end of the sample pretreatment tube (10) is connected to the main pipeline (20), the other end of the sample pretreatment tube (10) is connected to the analyzer (30), and a pressure reducing valve (11) is provided on the sample pretreatment tube (10); and A drain pipe (50), the drain pipe (50) is connected to the sample pretreatment tube (10) and is located between the main pipeline (20) and the analyzer (30) for discharging the fluid transmitted from the sample pretreatment tube (10) to the drain pipe (50).

2. The detection pipeline system according to claim 1, characterized in that, At least one first control valve is provided on the drain pipe (50).

3. The detection pipeline system according to claim 2, wherein The first control valve includes a first globe valve (51) and / or a first ball valve (53).

4. The detection pipeline system according to claim 3, wherein A first flow meter (52) is further provided on the drain pipe (50).

5. The detection pipeline system according to any one of claims 1 to 4, characterized in that, The drain pipe (50) is located between the main pipeline (20) and the pressure reducing valve (11).

6. The detection pipeline system according to claim 5, characterized in that, The drain pipe (50) is arranged adjacent to the pressure reducing valve (11).

7. The detection pipeline system according to any one of claims 1 to 4 and 6, characterized in that A filter (31) and a drying tube (32) are provided between the pressure reducing valve (11) and the analyzer (30); A calibration tube (33) is further provided between the pressure reducing valve (11) and the filter (31); A third flow meter (34) is provided on the outlet pipeline of the analyzer (30).

8. The detection pipeline system according to any one of claims 1 to 4 and 6, characterized in that, A solenoid valve (12) is provided on the sample pretreatment tube (10), and the solenoid valve (12) is located between the main pipeline (20) and the drain pipe (50); A second globe valve (13) and a second ball valve (14) are provided on the sample pretreatment tube (10), and the second globe valve (13) and the second ball valve (14) are located between the main pipeline (20) and the drain pipe (50); A joint (15) is provided on the sample pretreatment tube (10).

9. The detection pipeline system according to claim 8, wherein The sample pretreatment tube includes a pressure guiding tube (10a) and a sampling tube (10b), one end of the pressure guiding tube (10a) is connected to the main pipeline (20), the other end of the pressure guiding tube (10a) is connected to the sampling tube (10b), and the end of the sampling tube (10b) facing away from the pressure guiding tube (10a) is connected to the analyzer (30); The solenoid valve (12) and the second globe valve (13) are provided on the pressure guiding tube (10a), and the second globe valve (13) is provided between the main pipeline (20) and the solenoid valve (12); The drain pipe (50), the pressure reducing valve (11), and the second ball valve (14) are provided on the sampling tube (10b), and the drain pipe (50) is located between the second ball valve (14) and the pressure reducing valve (11); The joint (15) is provided between the pressure guiding tube (10a) and the sampling tube (10b).

10. The detection pipeline system according to claim 9, wherein, The pressure guiding tube (10a) includes a vertical pipe section (101), an inclined pipe section (102), and a horizontal pipe section (103) that are connected in sequence. The vertical pipe section (101) is connected to the main pipeline (20) at the end facing away from the inclined pipe section (102), and the horizontal pipe section (103) is connected to the sampling tube (10b) at the end facing away from the inclined pipe section (102).

11. The detection pipeline system according to claim 9 or 10, characterized in that, The length of the pressure guiding pipe (10a) is greater than or equal to 3 m.

12. A gas detection device for an electrolysis equipment, characterized in that, It includes the detection pipeline system according to any one of claims 1 to 11.

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