Monitoring method and monitoring device for running state of hydrogen conveying pipeline

Abstract

The invention provides a method and a device for monitoring the running state of a hydrogen conveying pipeline. The method for monitoring the running state of the hydrogen conveying pipeline is based on a device for monitoring the running state of the hydrogen conveying pipeline, the device for monitoring the running state of the hydrogen conveying pipeline comprises a monitoring device, the conveying pipeline and a connector, and the method for monitoring the running state of the hydrogen conveying pipeline comprises the following steps that the hydrogen concentration of the outer surface of the corresponding connector is detected through a hydrogen concentration detector; the displacement change value between the joint and the conveying pipeline connected with the joint is detected through a displacement sensor; when it is detected that the numerical value of the hydrogen concentration data on the outer surface of the connector is larger than or equal to a first preset value, the alarm system sends out an alarm signal; when the displacement change value between the connector and the conveying pipeline connected with the connector is larger than or equal to a second preset value, the alarm system sends out an early warning signal or an alarm signal. Therefore, the method for monitoring the running state of the hydrogen conveying pipeline has the advantages of high safety and high reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen pipeline monitoring, and particularly relates to a method and a device for monitoring the operation state of a hydrogen pipeline. Background Art

[0002] Compared with metal pipelines, the thermoplastic non-metallic composite pipeline transportation system can solve problems faced by metal pipelines such as hydrogen embrittlement, weak welding joints, and high construction and operation costs. It has many advantages such as high pressure resistance, acid and alkali resistance, anti-microbial erosion, good flexibility and mechanical strength, aging resistance, long service life, and low investment cost, and can meet more demanding special environmental conditions. Its excellent characteristics can meet diverse hydrogen transportation scenarios. One is to fit the integrated model of offshore wind power hydrogen production and hydrogen transportation platforms in the eastern coastal areas, and can become the preferred hydrogen transportation method between offshore platforms and between land and sea, opening up new space for the hydrogen pipeline market of the group's coastal area companies; the second is to adapt to the medium and short-distance high-pressure hydrogen transportation application scenarios in the hydrogen production-hydrogen transportation-hydrogen blending integrated demonstration projects in demonstration projects; the third is applicable to high-pressure hydrogen gathering and transportation application scenarios with compact layouts such as hydrogen refueling stations, hydrogen chemical industries, and salt cavern hydrogen storage libraries. At the same time, the thermoplastic non-metallic pipeline hydrogen transportation technology is less restricted by regions, environments, and climates, has a small laying footprint, and has strong reliability and adaptability. It is estimated that using this hydrogen transportation technology solution can significantly shorten the construction period and greatly reduce costs, with obvious cost advantages, and will have wide applications in future large-scale pipeline hydrogen transportation. In related technologies, the monitoring method of metal joints of hydrogen pipelines mainly relies on regular inspection, monitoring, and early warning, and there are problems of potential safety hazards and low efficiency. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related technologies to some extent. To this end, an embodiment of the present invention provides a method and a device for monitoring the operation state of a hydrogen pipeline.

[0004] The method for monitoring the operation state of a hydrogen pipeline according to an embodiment of the present invention is based on a device for monitoring the operation state of a hydrogen pipeline. The device for monitoring the operation state of a hydrogen pipeline includes a monitoring device, a conveying pipeline, and a joint. Two adjacent conveying pipelines are connected by one joint. The monitoring device includes a hydrogen concentration detector, a displacement sensor, and an alarm system. The method for monitoring the operation state of a hydrogen pipeline includes the following steps:

[0005] Set the hydrogen concentration detector on the outer surface of the joint, and use the hydrogen concentration detector to detect the hydrogen concentration at the outer surface of the corresponding joint;

[0006] Use the displacement sensor to detect the displacement change value between the joint and the conveying pipeline connected thereto;

[0007] Wherein, when the value of the hydrogen concentration data at the outer surface of the joint is greater than or equal to a first preset value, the alarm system issues an alarm signal;

[0008] When the value of the hydrogen concentration data at the outer surface of the joint is less than the first preset value, and the displacement change value between the joint and the conveying pipeline connected thereto is greater than or equal to a second preset value, the alarm system issues a warning signal or an alarm signal.

[0009] Therefore, the hydrogen pipeline operation state monitoring method according to the embodiments of the present invention has the advantages of high safety and high reliability.

[0010] In some embodiments, when the displacement change value between the joint and the conveying pipeline connected thereto is greater than or equal to a third preset value, the alarm system issues an alarm signal, and the third preset value is greater than the second preset value;

[0011] When the value of the hydrogen concentration data at the outer surface of the joint is less than the first preset value, the displacement change value between the joint and the conveying pipeline connected thereto is less than the third preset value, and the value of the hydrogen concentration data at the outer surface of the joint is greater than or equal to a fourth preset value, and / or, the displacement change value between the joint and the conveying pipeline connected thereto is greater than or equal to the second preset value, the alarm system issues a warning signal, and the fourth preset value is less than the first preset value.

[0012] In some embodiments, when the value of the hydrogen concentration data at the outer surface of the joint is greater than or equal to 100 ppm, the alarm system issues an alarm signal;

[0013] For a conveying pipeline with an inner diameter of the pipeline greater than or equal to 25 mm and less than 80 mm, when the value of the hydrogen concentration data at the outer surface of the joint is less than 100 ppm, and the displacement change value between the joint and the conveying pipeline connected thereto is greater than or equal to 2 mm, the alarm system issues a warning signal or an alarm signal;

[0014] For a conveying pipeline with an inner diameter of the pipeline greater than or equal to 80 mm and less than or equal to 150 mm, when the value of the hydrogen concentration data at the outer surface of the joint is less than 100 ppm, and the displacement change value between the joint and the conveying pipeline connected thereto is greater than or equal to 4 mm, the alarm system issues a warning signal or an alarm signal.

[0015] In some embodiments, for a conveying pipeline with an inner diameter of the pipeline greater than or equal to 25 mm and less than 80 mm, when the displacement change value between the joint and the conveying pipeline connected thereto is greater than or equal to 5 mm, the alarm system issues an alarm signal;

[0016] For a conveying pipeline with an inner diameter greater than or equal to 80 mm and less than or equal to 150 mm, when the displacement change value between the joint and the connected conveying pipeline is detected to be greater than or equal to 10 mm, the alarm system emits an alarm signal;

[0017] For a conveying pipeline with an inner diameter greater than or equal to 25 mm and less than 80 mm, when the value of the hydrogen concentration data at the outer surface of the joint is detected to be less than 100 ppm, the displacement change value between the joint and the connected conveying pipeline is detected to be less than 5 mm, and the value of the hydrogen concentration data at the outer surface of the joint is detected to be greater than or equal to 10 ppm, and / or the displacement change value between the joint and the connected conveying pipeline is detected to be greater than or equal to 2 mm, the alarm system emits a warning signal;

[0018] For a conveying pipeline with an inner diameter greater than or equal to 80 mm and less than or equal to 150 mm, when the value of the hydrogen concentration data at the outer surface of the joint is detected to be less than 100 ppm, the displacement change value between the joint and the connected conveying pipeline is detected to be less than 10 mm, and the value of the hydrogen concentration data at the outer surface of the joint is detected to be greater than or equal to 10 ppm, and / or the displacement change value between the joint and the connected conveying pipeline is detected to be greater than or equal to 4 mm, the alarm system emits a warning signal.

[0019] In some embodiments, the hydrogen pipeline operation status monitoring device includes a measurement system, and the measurement system includes at least one of a first temperature measuring instrument, a pressure measuring instrument, a second temperature measuring instrument, and a hygrometer;

[0020] The first temperature measuring instrument is used to detect the hydrogen temperature value in the conveying pipeline;

[0021] The pressure measuring instrument is used to detect the hydrogen pressure value in the conveying pipeline;

[0022] The second temperature measuring instrument is arranged at the outer surface of the joint, and the second temperature measuring instrument is used to detect the surface temperature value of the joint;

[0023] The hygrometer is arranged at the outer surface of the joint, and the hygrometer is used to detect the humidity value at the outer surface of the joint;

[0024] The measurement system is used to detect at least one of the hydrogen temperature value in the conveying pipeline, the hydrogen pressure value in the conveying pipeline, the surface temperature value of the joint, and the humidity value at the outer surface of the joint;

[0025] When at least one of the hydrogen temperature value in the conveying pipeline, the hydrogen pressure value in the conveying pipeline, the surface temperature value of the joint, and the humidity value at the outer surface of the joint is an abnormal state value, and the displacement change value between the joint and the conveying pipeline connected thereto is greater than or equal to the second preset value, the alarm system issues a warning signal or an alarm signal.

[0026] In some embodiments, the measurement system is used to detect the hydrogen temperature value in the conveying pipeline, the hydrogen pressure value in the conveying pipeline, the surface temperature value of the joint, and the humidity value at the outer surface of the joint;

[0027] When it is detected that the surface temperature value of the joint is less than -20°C or greater than 65°C, it is determined that the surface temperature value of the joint is an abnormal state value;

[0028] When it is detected that the hydrogen pressure fluctuation in the conveying pipeline is greater than or equal to 3% / min or when it is detected that the hydrogen pressure value in the conveying pipeline is greater than the design pressure value of the conveying pipeline, it is determined that the hydrogen pressure value in the conveying pipeline is an abnormal state value;

[0029] When it is detected that the humidity value at the outer surface of the joint is less than 40% or greater than 80%, it is determined that the humidity value at the outer surface of the joint is an abnormal state value.

[0030] In some embodiments, the hydrogen pipeline operation state monitoring device includes a data processing system. The data processing system includes a data receiving unit, a data processing unit, and a data storage unit. The data receiving unit is connected to the data processing unit, the data storage unit, the hydrogen concentration detector, and the displacement sensor. The data processing unit is connected to the alarm system;

[0031] The data receiving unit is used to receive the hydrogen concentration data detected by the hydrogen concentration detector and the displacement change value data detected by the displacement sensor;

[0032] The data processing unit can process the received hydrogen concentration data and displacement change value data. When the value of the received hydrogen concentration data is greater than or equal to the first preset value, the data processing unit controls the alarm system to issue an alarm signal. When it is detected that the value of the hydrogen concentration data at the outer surface of the joint is less than the first preset value, and the displacement change value between the joint and the conveying pipeline connected thereto is greater than or equal to the second preset value, the data processing unit controls the alarm system to issue a warning signal or an alarm signal;

[0033] The data storage unit is used to store the hydrogen concentration data and the displacement change value data;

[0034] During the commissioning phase of the hydrogen pipeline, the acquisition frequency of the data receiving unit is once every fifth preset time;

[0035] During the operation phase of the hydrogen pipeline, the acquisition frequency of the data receiving unit is once every sixth preset time, and the value of the fifth preset time is less than the value of the sixth preset time;

[0036] After the alarm system issues a warning signal, check the corresponding joint;

[0037] After the alarm system issues an alarm signal, stop the operation of the corresponding pipeline and repair the corresponding joint.

[0038] In some embodiments, the fifth preset time is greater than or equal to 1 minute and less than or equal to 10 minutes;

[0039] The sixth preset time is greater than or equal to 20 minutes and less than or equal to 60 minutes.

[0040] The present invention also provides a monitoring device for the operating state of a hydrogen pipeline, including

[0041] A pipeline for transporting hydrogen and a joint, and two adjacent pipelines for transporting hydrogen are connected by one joint;

[0042] A monitoring device, the monitoring device includes a hydrogen concentration detector, a displacement sensor and an alarm system, the hydrogen concentration detector is arranged on the outer surface of the joint, the hydrogen concentration detector is used to detect the hydrogen concentration inside the outer surface of the joint, and the displacement sensor is used to detect the displacement change value between the connected joint and the pipeline for transporting hydrogen; wherein,

[0043] When the value of the hydrogen concentration data at the outer surface of the joint is greater than or equal to a first preset value, the alarm system issues an alarm signal;

[0044] When the value of the hydrogen concentration data at the outer surface of the joint is less than the first preset value, and the displacement change value between the joint and the pipeline for transporting hydrogen connected thereto is greater than or equal to a second preset value, the alarm system issues a warning signal or an alarm signal.

[0045] In some embodiments, the alarm system includes an audible and visual alarm arranged on the outer surface of the joint and an alarm device arranged in the control room;

[0046] The pipeline for transporting hydrogen is a non-metal pipeline, and the joint is a metal joint;

[0047] The hydrogen concentration detector is arranged on the top of the joint;

[0048] The resolution of the hydrogen concentration detector is less than or equal to 2 ppm;

[0049] The displacement sensor is located on the outer surface of the joint, and the displacement sensor includes at least one of a wire encoder, a grating scale, a capacitive grating scale, and a laser sensor;

[0050] The hydrogen pipeline operation state monitoring device includes a measurement system, and the measurement system includes at least one of a first temperature measuring instrument, a pressure measuring instrument, a second temperature measuring instrument, and a hygrometer;

[0051] The first temperature measuring instrument is used to detect the hydrogen temperature value in the conveying pipeline;

[0052] The pressure measuring instrument is used to detect the hydrogen pressure value in the conveying pipeline;

[0053] The second temperature measuring instrument is arranged on the outer surface of the joint, and the second temperature measuring instrument is used to detect the surface temperature value of the joint;

[0054] The hygrometer is arranged on the outer surface of the joint, and the hygrometer is used to detect the humidity value on the outer surface of the joint. Description of the Drawings

[0055] Figure 1 is a schematic diagram of a joint and a monitoring device according to an embodiment of the present invention.

[0056] Reference Signs: 1, conveying pipeline; 2, joint; 4, hydrogen concentration detector; 5, displacement sensor; 51, first detection end; 52, second detection end; 6, acoustic-optic alarm. Detailed Embodiments

[0057] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0058] The hydrogen pipeline operation state monitoring method and monitoring device according to an embodiment of the present invention will be described below with reference to the drawings.

[0059] Such as Figure 1As shown, the hydrogen pipeline operation status monitoring device according to an embodiment of the present invention includes a monitoring device, a conveying pipeline 1, and a joint 2. There are multiple conveying pipelines 1 and joints 2. Two adjacent conveying pipelines 1 are connected by one joint 2. The monitoring device includes a hydrogen concentration detector 4, a displacement sensor 5, and an alarm system. Specifically, the conveying pipeline 1 is a non-metallic pipeline, and the joint 2 is a metal joint. Each joint 2 is provided with a hydrogen concentration detector 4 and a displacement sensor 5 that cooperate with it, and each joint 2 is connected to at least part of the alarm system. The hydrogen concentration detector 4 is used to detect the hydrogen concentration on the outer surface of the joint 2, and the displacement sensor 5 is used to detect the displacement change value between the joint 2 and the conveying pipeline 1 connected to it. For example, the front and rear ends of the joint 2 are connected to two conveying pipelines 1, and the extending direction of the conveying pipeline 1 is the front-rear direction.

[0060] As Figure 1 shown, the hydrogen pipeline operation status monitoring method according to an embodiment of the present invention includes the following steps:

[0061] The hydrogen concentration detector 4 is arranged on the outer surface of the joint 2, and the hydrogen concentration detector 4 is used to detect the hydrogen concentration on the outer surface of the joint 2. The connection between the joint 2 and the conveying pipeline 1 connected to it is a position prone to leakage. By arranging the hydrogen concentration detector 4 on the outer surface of the joint 2, it is convenient for the hydrogen concentration detector 4 to detect the leaked hydrogen concentration.

[0062] The displacement sensor 5 is used to detect the displacement change value between the joint 2 and the conveying pipeline 1 connected to it. After the displacement change value (deformation) between the joint 2 and the conveying pipeline 1 connected to it is large, the probability of leakage at the connection between the joint 2 and the conveying pipeline 1 connected to it increases.

[0063] Among them, when the value of the hydrogen concentration data detected on the outer surface of the joint 2 is greater than or equal to the first preset value, the alarm system issues an alarm signal. Specifically, the first preset value is the set hydrogen leakage safety value. When the hydrogen concentration on the outer surface of the joint 2 exceeds the first preset value, it indicates that more hydrogen is leaked at the connection between the joint 2 and the conveying pipeline 1 connected to it, and maintenance is required. At this moment, the data processing unit controls the alarm system to issue an alarm signal, and after the staff receives the alarm signal, it is convenient to repair the corresponding joint 2.

[0064] When the value of the hydrogen concentration data detected on the outer surface of the joint 2 is less than the first preset value, and the displacement change value between the joint 2 and the conveying pipeline 1 connected thereto is greater than or equal to the second preset value, the alarm system issues a warning signal or an alarm signal. When the hydrogen concentration on the outer surface of the joint 2 does not reach the first preset value, and the value of the displacement change value data is greater than or equal to the second preset value, it indicates that the displacement between the joint 2 and the conveying pipeline 1 connected thereto is large, and the probability of leakage is high. At this moment, the data processing unit controls the alarm system to issue a warning signal or an alarm signal, and the staff can determine the position of the corresponding joint 2 according to the warning signal and the alarm signal. After receiving the warning signal, the staff can easily repair the corresponding joint 2.

[0065] According to the hydrogen pipeline operation status monitoring method of the embodiment of the present invention, the data detected by the displacement sensor 5 and the hydrogen concentration detector 4 can facilitate the judgment of the connection status (deformation condition) between the corresponding joint 2 and the conveying pipeline 1 connected thereto, so as to facilitate the discovery of the status and damage condition of the joint 2 in time, prevent leakage or accidents caused by the failure of the joint 2, and thus improve the safety. And it has high reliability, monitors the status of the joint 2 in real time, reduces the dependence on manual inspection, and improves the reliability and stability of the pipeline system. Reduces the cost of manual inspection and improves the operation efficiency and economy of the hydrogen pipeline.

[0066] Therefore, the hydrogen pipeline operation status monitoring method according to the embodiment of the present invention has the advantages of high safety and high reliability. The hydrogen pipeline operation status monitoring device according to the embodiment of the present invention has the advantages of high safety and high reliability.

[0067] In some embodiments, when the value of the hydrogen concentration data detected on the outer surface of the joint 2 is greater than or equal to 100 ppm, the alarm system issues an alarm signal. That is, 100 ppm is the set safety value. When the value of the hydrogen concentration data detected on the outer surface of the joint 2 is greater than or equal to 100 ppm, it proves that the joint 2 and the conveying pipeline 1 have leaked, and the alarm system issues an alarm signal so that the staff can quickly carry out repairs.

[0068] For a conveying pipeline 1 with an inner diameter greater than or equal to 25 mm and less than 80 mm, when the value of the hydrogen concentration data at the outer surface of the joint 2 is less than 100 ppm and the displacement change value between the joint 2 and the conveying pipeline 1 connected thereto is greater than or equal to 2 mm, the alarm system issues a warning signal or an alarm signal. Specifically, for the conveying pipeline 1 with a smaller inner diameter (inner diameter greater than or equal to 25 mm and less than 80 mm), the displacement change value between the joint 2 and the conveying pipeline 1 connected thereto being greater than or equal to 2 mm indicates that a certain deformation has occurred in the conveying pipeline 1 and the joint 2, and there is a possibility of leakage. And when the value of the hydrogen concentration data at the outer surface of the joint 2 is detected to be less than 100 ppm, it proves that the leakage amount is small or there is no leakage, and the alarm system issues a warning signal or an alarm signal, facilitating the maintenance of the corresponding joint 2 by the staff, thereby reducing the possibility of leakage. For example, for a conveying pipeline 1 with an inner diameter greater than or equal to 25 mm and less than 80 mm, when the value of the hydrogen concentration data at the outer surface of the joint 2 is less than 100 ppm and the displacement change value between the joint 2 and the conveying pipeline 1 connected thereto reaches 3 mm, the alarm system issues a warning signal.

[0069] For a conveying pipeline 1 with an inner diameter greater than or equal to 80 mm and less than or equal to 150 mm, when the value of the hydrogen concentration data at the outer surface of the joint 2 is less than 100 ppm and the displacement change value between the joint 2 and the conveying pipeline 1 connected thereto is greater than or equal to 4 mm, the alarm system issues a warning signal or an alarm signal.

[0070] Specifically, for the conveying pipeline 1 with a larger inner diameter (inner diameter greater than or equal to 80 mm and less than or equal to 150 mm), the displacement change value between the joint 2 and the conveying pipeline 1 connected thereto being greater than or equal to 4 mm indicates that a certain deformation has occurred in the conveying pipeline 1 and the joint 2, and there is a possibility of leakage. And when the value of the hydrogen concentration data at the outer surface of the joint 2 is detected to be less than 100 ppm, it proves that the leakage amount is small or there is no leakage, and the alarm system issues a warning signal, facilitating the maintenance by the staff, thereby reducing the possibility of leakage. For example, for a conveying pipeline 1 with an inner diameter greater than or equal to 80 mm and less than or equal to 150 mm, when the value of the hydrogen concentration data at the outer surface of the joint 2 is less than 100 ppm and the displacement change value between the joint 2 and the conveying pipeline 1 connected thereto reaches 6 mm, the alarm system issues a warning signal.

[0071] In some embodiments, when the displacement change value between the joint 2 and the conveying pipeline 1 connected thereto is greater than or equal to a third preset value, it indicates that the deformation between the joint 2 and the conveying pipeline 1 connected thereto is large and the probability of leakage is high, and the alarm system issues an alarm signal, and the third preset value is greater than the second preset value.

[0072] Specifically, for the conveying pipeline 1 with an inner diameter greater than or equal to 25 mm and less than 80 mm, when the displacement change value between the detection joint 2 and the connected conveying pipeline 1 is greater than or equal to 5 mm, the alarm system issues an alarm signal. For the conveying pipeline 1 with an inner diameter greater than or equal to 80 mm and less than or equal to 150 mm, when the displacement change value between the detection joint 2 and the connected conveying pipeline 1 is greater than or equal to 10 mm, the alarm system issues an alarm signal.

[0073] When the numerical value of the hydrogen concentration data at the outer surface of the joint 2 is less than the first preset value, the displacement change value between the joint 2 and the connected conveying pipeline 1 is less than the third preset value, and the numerical value of the hydrogen concentration data at the outer surface of the joint 2 is greater than or equal to the fourth preset value, and / or the displacement change value between the joint and the conveying pipeline is greater than or equal to the second preset value, the alarm system issues a warning signal, and the fourth preset value is less than the first preset value. That is, when the numerical value of the hydrogen concentration data at the outer surface of the joint 2 and the displacement change value between the joint 2 and the connected conveying pipeline 1 do not reach the alarm value, and when one of the situations that the numerical value of the hydrogen concentration data at the outer surface of the joint 2 is greater than or equal to the fourth preset value and the displacement change value between the joint 2 and the connected conveying pipeline 1 is greater than or equal to the second preset value occurs, it indicates that the joint 2 may leak, and the alarm system issues a warning signal for maintenance to improve safety.

[0074] For the conveying pipeline with an inner diameter greater than or equal to 25 mm and less than 80 mm, when the numerical value of the hydrogen concentration data at the outer surface of the detection joint 2 is less than 100 ppm, the displacement change value between the detection joint 2 and the connected conveying pipeline 1 is less than 5 mm, and the numerical value of the hydrogen concentration data at the outer surface of the joint 2 is greater than or equal to 10 ppm, and / or the displacement change value between the joint and the conveying pipeline is greater than or equal to 2 mm, the alarm system issues a warning signal. That is, when the numerical value of the hydrogen concentration data at the outer surface of the joint 2 and the displacement change value between the joint 2 and the connected conveying pipeline 1 do not reach the alarm value, and when one of the situations that the numerical value of the hydrogen concentration data at the outer surface of the joint 2 is greater than or equal to 10 ppm and the displacement change value between the joint 2 and the connected conveying pipeline 1 is greater than or equal to 2 mm occurs, it indicates that the joint 2 may leak, and the alarm system issues a warning signal for maintenance to improve safety.

[0075] For a conveying pipeline with an inner diameter greater than or equal to 80 mm and less than or equal to 150 mm, when the value of the hydrogen concentration data at the outer surface of the joint 2 is less than 100 ppm and the displacement change value between the detection joint and the conveying pipeline 1 is less than 10 mm, and when the value of the hydrogen concentration data at the outer surface of the joint 2 is greater than or equal to 10 ppm, and / or the displacement change value between the joint and the conveying pipeline is greater than or equal to 4 mm, the alarm system issues a warning signal. That is, when the value of the hydrogen concentration data at the outer surface of the joint 2 and the displacement change value between the joint 2 and the connected conveying pipeline 1 do not reach the alarm value, and when either the value of the hydrogen concentration data at the outer surface of the joint 2 is greater than or equal to 10 ppm or the displacement change value between the joint 2 and the connected conveying pipeline 1 is greater than or equal to 4 mm occurs, it indicates that the joint 2 may leak, and the alarm system issues a warning signal for maintenance to improve safety.

[0076] In some embodiments, the hydrogen pipeline operation state monitoring device includes a measurement system, and the measurement system includes at least one of a first temperature measuring instrument, a pressure measuring instrument, a second temperature measuring instrument, and a hygrometer.

[0077] The first temperature measuring instrument is used to detect the hydrogen temperature value in the conveying pipeline 1. The pressure measuring instrument is used to detect the hydrogen pressure value in the conveying pipeline 1. The second temperature measuring instrument is arranged at the outer surface of the joint 2. The second temperature measuring instrument is used to detect the surface temperature value of the joint 2. The hygrometer is arranged at the outer surface of the joint 2, and the hygrometer is used to detect the humidity value at the outer surface of the joint 2 (the environment of the joint 2). The measurement system is used to detect at least one of the hydrogen temperature value in the conveying pipeline 1, the hydrogen pressure value in the conveying pipeline 1, the surface temperature value of the joint 2, and the humidity value at the outer surface of the joint 2. The hydrogen temperature value, the hydrogen pressure value in the conveying pipeline 1, the surface temperature value of the joint 2, and the humidity value at the outer surface of the joint 2 can verify whether the joint 2 leaks from the side. For example, the first temperature measuring instrument and the pressure measuring instrument are arranged in the conveying pipeline 1 or the joint 2.

[0078] When at least one of the hydrogen temperature value in the conveying pipeline 1, the hydrogen pressure value in the conveying pipeline 1, the surface temperature value of the joint 2, and the humidity value at the outer surface of the joint 2 is an abnormal state value, and the displacement change value between the joint 2 and the conveying pipeline 1 connected thereto is greater than or equal to a second preset value, the alarm system issues a warning signal or an alarm signal. Specifically, when at least one of the hydrogen temperature value in the conveying pipeline 1, the hydrogen pressure value in the conveying pipeline 1, the surface temperature value of the joint 2, and the humidity value at the outer surface of the joint 2 is an abnormal state value, it indicates that the influence may be caused by the leakage of the joint 2. If at the same time the displacement change value between the joint 2 and the conveying pipeline 1 connected thereto is greater than or equal to a second preset value, it indicates that the probability of leakage of the joint 2 is relatively high, and the alarm system issues a warning signal or an alarm signal for the staff to carry out maintenance. Thus, the problem that the displacement data exceeds the normal working parameter range within a short time due to external factors such as temperature change or accidental touch, resulting in misjudging the failure of the metal joint 21 and triggering an alarm, can be solved. When the displacement data changes violently within a short time, it may indicate that the joint 2 is disconnected, which will lead to serious accidents and huge losses. However, this situation may also be caused by accidental touch or instrument failure. According to the actual operation situation, if the joint 2 falls off, there will usually be a pressure drop, temperature change, and an alarm from the hydrogen gas detector. Therefore, by comprehensively analyzing multiple instrument parameters (the displacement change value between the joint 2 and the conveying pipeline 1 connected thereto), accidents can be identified more effectively and misjudgment can be reduced.

[0079] In some embodiments, a measurement system is used to detect the hydrogen temperature value in the conveying pipeline 1, the hydrogen pressure value in the conveying pipeline 1, the surface temperature value of the joint 2, and the humidity value at the outer surface of the joint 2.

[0080] When it is detected that the surface temperature value of the joint 2 is less than -20°C or greater than 65°C, the surface temperature value of the joint 2 is determined to be an abnormal state value. For example, when it is detected that the surface temperature value of the joint 2 is less than -20°C or greater than 65°C, and the displacement change value between the joint 2 and the conveying pipeline 1 connected thereto is greater than or equal to a second preset value, the alarm system issues a warning signal or an alarm signal.

[0081] When it is detected that the hydrogen pressure fluctuation in the conveying pipeline 1 is greater than or equal to 3% / min or when it is detected that the hydrogen pressure value in the conveying pipeline 1 is greater than the design pressure value of the conveying pipeline 1, the hydrogen pressure value in the conveying pipeline 1 is determined to be an abnormal state value. For example, when it is detected that the hydrogen pressure value in the conveying pipeline 1 is greater than or equal to 3% / min, and the displacement change value between the joint 2 and the conveying pipeline 1 connected thereto is greater than or equal to a second preset value, the alarm system issues a warning signal or an alarm signal.

[0082] When the humidity value at the outer surface of the joint 2 is detected to be less than 40% or greater than 80%, it is determined that the humidity value at the outer surface of the joint 2 is an abnormal state value. For example, when the humidity value at the outer surface of the joint 2 is detected to be less than 40% or greater than 80%, and the displacement change value between the joint 2 and the conveying pipeline 1 connected thereto is greater than or equal to the second preset value, the alarm system issues a warning signal or an alarm signal.

[0083] The alarm system includes an audible and visual alarm 6 provided on the outer surface of the joint 2 and an alarm device provided in the control room. The audible and visual alarm 6 located on the outer surface of the joint 2 can emit an alarm sound and alarm light. For example, the controller of the audible and visual alarm 6 is located at the top of the joint 2. After the corresponding alarm system issues a warning signal, the corresponding audible and visual alarm 6 can emit a yellow alarm light. After the corresponding alarm system issues an alarm signal, the corresponding audible and visual alarm 6 can emit a red alarm light. The audible and visual alarm 6 can facilitate the staff to visually see the problematic joint 2, and the alarm device in the control room can facilitate the monitoring staff to monitor the states of multiple joints 2. The alarm device can be a notification system or other forms of alarm equipment for timely notifying relevant personnel or systems of the abnormal state of the joint 2.

[0084] In some embodiments, the hydrogen pipeline operation state monitoring device includes a data processing system, which includes a data receiving unit, a data processing unit, and a data storage unit. The data receiving unit is connected to the data processing unit, the data storage unit, the hydrogen concentration detector 4, and the displacement sensor 5, and the data processing unit is connected to the alarm system. For example, the data receiving unit is also connected to a first temperature measuring instrument, a pressure measuring instrument, a second temperature measuring instrument, and a hygrometer to receive relevant data.

[0085] The data receiving unit is used to receive the hydrogen concentration data detected by the hydrogen concentration detector 4 and the displacement change value data detected by the displacement sensor 5. For example, the data receiving unit collects and receives raw data (the hydrogen concentration data detected by the hydrogen concentration detector 4 and the displacement change value data detected by the displacement sensor 5) from various data sources. The data sources can be sensors, databases, files, network interfaces, etc. The data receiving unit may need to perform some preliminary format conversions or preprocessing to ensure that the data can be correctly read and understood by the subsequent data processing unit.

[0086] The data processing unit is responsible for cleaning, transforming, analyzing, and calculating the received data. Data processing can include removing invalid or incorrect data (data cleaning), converting the data into a format suitable for analysis (data transformation), performing statistical analysis or machine learning algorithms (data analysis), etc. The goal of data processing is to extract useful information or insights to support decision-making or further business operations.

[0087] The data processing unit can process the received hydrogen concentration data and displacement change value data. When the value of the received hydrogen concentration data is greater than or equal to the first preset value, the data processing unit controls the alarm system to send an alarm signal. When it is detected that the value of the hydrogen concentration data at the outer surface of joint 2 is less than the first preset value, and the displacement change value between joint 2 and the conveying pipeline 1 connected thereto is greater than or equal to the second preset value, the data processing unit controls the alarm system to send a warning signal or an alarm signal. Specifically, the data processing unit can control the alarm system to send a warning signal or an alarm signal according to the received relevant data. For example, the data processing unit is implemented by devices such as a microprocessor or a computer, has the ability to process displacement data in real time, and can perform status evaluation according to the set thresholds. It also includes a remote monitoring interface connected to the data processing unit to implement remote monitoring and data transmission functions.

[0088] The data storage unit is used to store the hydrogen concentration data and displacement change value data, so as to long-term track and analyze the displacement change of the metal joint 2 by calling historical data. For example, the data storage unit can be set on joint 2 to ensure that the data storage capacity meets the requirement of storing all data during the service life of the pipeline.

[0089] During the commissioning stage of the hydrogen transmission pipeline, the acquisition frequency of the data receiving unit is once every fifth preset time. Specifically, the fifth preset time is greater than or equal to 1 minute and less than or equal to 10 minutes. For example, during the commissioning stage of the hydrogen transmission pipeline, the acquisition frequency of the data receiving unit is once every 5 minutes.

[0090] During the operation stage of the hydrogen transmission pipeline, the acquisition frequency of the data receiving unit is once every sixth preset time, and the value of the fifth preset time is less than the value of the sixth preset time. Specifically, the sixth preset time is greater than or equal to 20 minutes and less than or equal to 60 minutes. For example, during the operation stage of the hydrogen transmission pipeline, the acquisition frequency of the data receiving unit is once every 30 minutes.

[0091] The hydrogen concentration detector 4 is arranged at the top of joint 2, so as to facilitate the rapid measurement of the hydrogen concentration at the outer surface of joint 2.

[0092] The resolution of the hydrogen concentration detector 4 is less than or equal to 2 ppm, so as to ensure the detection accuracy.

[0093] The displacement sensor 5 is located on the outer surface of the joint 2. The displacement sensor 5 includes at least one of a wire-pulling encoder, a grating scale, a capacitive grating scale, and a laser sensor. Specifically, the displacement sensor 5 includes a first detection end 51 and a second detection end 52. The first detection end 51 is fixed on the corresponding joint 2 (outer surface), and the second detection end 52 is fixed on a fixing member on the conveying pipeline 1 connected to the joint 2. The first detection end 51 and the second detection end 52 are spaced apart in the length direction of the conveying pipeline 1. The displacement sensor 5 can detect the displacement change value between the first detection end 51 and the second detection end 52. For example, the displacement sensor 5 is a wire-pulling encoder and is equipped with a fixing member. The fixing member is connected to the second detection end 52 of the displacement sensor 5 and is used to fix one end of the displacement sensor 5 on the non-metallic pipeline and has a zero-adjusting function to eliminate the initial error and ensure the accuracy and stability of the measurement. The materials of the wire-pulling encoder and the fixing member need to have the property of resisting hydrogen corrosion to ensure stable working performance in a long-term hydrogen environment.

[0094] In some embodiments, after the alarm system issues a warning signal, the corresponding joint 2 is inspected. After the alarm system issues an alarm signal, the operation of the corresponding conveying pipeline 1 is stopped, and the corresponding joint 2 is repaired, thereby improving the safety of the hydrogen transmission pipeline.

[0095] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0096] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying 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 the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0097] In the present invention, unless otherwise clearly defined or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0098] In the present invention, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0099] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0100] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are within the protection scope of the present invention.

Claims

1. A method for monitoring the operating status of a hydrogen pipeline, characterized in that: Based on the hydrogen pipeline operation status monitoring device, the hydrogen pipeline operation status monitoring device includes a monitoring device, a delivery pipeline and a joint, two adjacent delivery pipelines are connected by one of the joints, the monitoring device includes a hydrogen concentration detector, a displacement sensor and an alarm system, and the hydrogen pipeline operation status monitoring method includes the following steps: The hydrogen concentration detector is arranged on the outer surface of the joint, and the hydrogen concentration at the corresponding outer surface of the joint is detected by the hydrogen concentration detector; Using the displacement sensor to detect the displacement change value between the joint and the delivery pipeline connected thereto; Wherein, when it is detected that the value of the hydrogen concentration data at the outer surface of the joint is greater than or equal to a first preset value, the alarm system sends out an alarm signal; When it is detected that the value of the hydrogen concentration data at the outer surface of the joint is less than the first preset value, and the displacement change value between the joint and the delivery pipeline connected thereto is greater than or equal to the second preset value, the alarm system sends a warning signal or an alarm signal.

2. The method for monitoring the operating status of a hydrogen pipeline according to claim 1, characterized in that: When the displacement change value between the joint and the delivery pipeline connected thereto is greater than or equal to a third preset value, the alarm system sends out an alarm signal, and the third preset value is greater than the second preset value; When it is detected that the value of the hydrogen concentration data at the outer surface of the joint is less than the first preset value, the displacement change value between the joint and the conveying pipeline connected thereto is less than the third preset value, and when it is detected that the value of the hydrogen concentration data at the outer surface of the joint is greater than or equal to the fourth preset value, and / or the displacement change value between the joint and the conveying pipeline connected thereto is greater than or equal to the second preset value, the alarm system sends a warning signal, and the fourth preset value is less than the first preset value.

3. The method for monitoring the operating status of a hydrogen pipeline according to claim 2, characterized in that: When the value of the hydrogen concentration data at the outer surface of the joint is detected to be greater than or equal to 100 ppm, the alarm system sends out an alarm signal; For a delivery pipeline with an inner diameter greater than or equal to 25 mm and less than 80 mm, when the value of the hydrogen concentration data at the outer surface of the joint is detected to be less than 100 ppm, and the displacement change value between the joint and the delivery pipeline connected thereto is detected to be greater than or equal to 2 mm, the alarm system sends out a warning signal or an alarm signal; For a transport pipeline with an inner diameter greater than or equal to 80 mm and less than or equal to 150 mm, when the hydrogen concentration data at the outer surface of the joint is detected to be less than 100 ppm, and the displacement change value between the joint and the transport pipeline connected thereto is detected to be greater than or equal to 4 mm, the alarm system sends a warning signal or an alarm signal.

4. The method for monitoring the operating status of a hydrogen pipeline according to claim 3, characterized in that: For a delivery pipe with an inner diameter greater than or equal to 25 mm and less than 80 mm, when the displacement change value between the joint and the delivery pipe connected thereto is detected to be greater than or equal to 5 mm, the alarm system sends out an alarm signal; For a delivery pipeline with an inner diameter greater than or equal to 80 mm and less than or equal to 150 mm, when the displacement change value between the joint and the delivery pipeline connected thereto is detected to be greater than or equal to 10 mm, the alarm system sends out an alarm signal; For a delivery pipeline with an inner diameter greater than or equal to 25 mm and less than 80 mm, when the value of the hydrogen concentration data at the outer surface of the joint is detected to be less than 100 ppm, the displacement change value between the joint and the delivery pipeline connected thereto is detected to be less than 5 mm, and the value of the hydrogen concentration data at the outer surface of the joint is detected to be greater than or equal to 10 ppm, and / or the displacement change value between the joint and the delivery pipeline connected thereto is greater than or equal to 2 mm, the alarm system sends out a warning signal; For a conveying pipeline with an inner diameter greater than or equal to 80 mm and less than or equal to 150 mm, when the value of the hydrogen concentration data at the outer surface of the joint is detected to be less than 100 ppm, the displacement change value between the joint and the conveying pipeline connected thereto is detected to be less than 10 mm, and the value of the hydrogen concentration data at the outer surface of the joint is detected to be greater than or equal to 10 ppm, and / or the displacement change value between the joint and the conveying pipeline connected thereto is greater than or equal to 4 mm, the alarm system sends out a warning signal.

5. The method for monitoring the operating status of a hydrogen pipeline according to claim 1, characterized in that: The hydrogen pipeline operation status monitoring device comprises a measurement system, wherein the measurement system comprises at least one of a first temperature measuring instrument, a pressure measuring instrument, a second temperature measuring instrument and a hygrometer; The first temperature measuring instrument is used to detect the temperature value of the hydrogen in the delivery pipeline; The pressure measuring instrument is used to detect the hydrogen pressure value in the delivery pipeline; The second temperature measuring instrument is arranged on the outer surface of the joint, and the second temperature measuring instrument is used to detect the surface temperature value of the joint; The hygrometer is arranged on the outer surface of the joint, and is used to detect the humidity value on the outer surface of the joint; Using the measurement system to detect at least one of a hydrogen temperature value in the delivery pipeline, a hydrogen pressure value in the delivery pipeline, a surface temperature value of the joint, and a humidity value at an outer surface of the joint; When at least one of the hydrogen temperature value in the delivery pipeline, the hydrogen pressure value in the delivery pipeline, the surface temperature value of the joint and the humidity value at the outer surface of the joint is an abnormal state value, and the displacement change value between the joint and the delivery pipeline connected thereto is greater than or equal to the second preset value, the alarm system sends a warning signal or an alarm signal.

6. The method for monitoring the operating status of a hydrogen pipeline according to claim 5, characterized in that: Using the measuring system to detect the hydrogen temperature value in the delivery pipeline, the hydrogen pressure value in the delivery pipeline, the surface temperature value of the joint, and the humidity value at the outer surface of the joint; When the surface temperature of the joint is detected to be less than -20°C or greater than 65°C, the surface temperature of the joint is determined to be an abnormal state value; When it is detected that the hydrogen pressure fluctuation in the delivery pipeline is greater than or equal to 3% / min or when it is detected that the hydrogen pressure value in the delivery pipeline is greater than the design pressure value of the delivery pipeline, it is determined that the hydrogen pressure value in the delivery pipeline is an abnormal state value; When it is detected that the humidity value at the outer surface of the joint is less than 40% or greater than 80%, it is determined that the humidity value at the outer surface of the joint is an abnormal state value.

7. The method for monitoring the operating status of a hydrogen pipeline according to claim 1, characterized in that: The hydrogen pipeline operation status monitoring device comprises a data processing system, wherein the data processing system comprises a data receiving unit, a data processing unit and a data storage unit, wherein the data receiving unit is connected to the data processing unit, the data storage unit, the hydrogen concentration detector and the displacement sensor, and the data processing unit is connected to the alarm system; The data receiving unit is used to receive the hydrogen concentration data detected by the hydrogen concentration detector and the displacement change value data detected by the displacement sensor; The data processing unit can process the received hydrogen concentration data and displacement change value data. When the value of the received hydrogen concentration data is greater than or equal to a first preset value, the data processing unit controls the alarm system to send an alarm signal. When it is detected that the value of the hydrogen concentration data at the outer surface of the joint is less than the first preset value, and the displacement change value between the joint and the delivery pipeline connected thereto is greater than or equal to a second preset value, the data processing unit controls the alarm system to send a warning signal or an alarm signal. The data storage unit is used to store hydrogen concentration data and displacement change value data; During the commissioning phase of the hydrogen transmission pipeline, the data receiving unit collects data at a frequency of once during a fifth preset time; During the operation phase of the hydrogen transmission pipeline, the data receiving unit collects data at a frequency of once per a sixth preset time, and the value of the fifth preset time is less than the value of the sixth preset time; After the alarm system issues a warning signal, checking the corresponding connector; After the alarm system sends out an alarm signal, the operation of the corresponding delivery pipeline is stopped and the corresponding joint is repaired.

8. The method for monitoring the operating status of a hydrogen pipeline according to claim 7, characterized in that: The fifth preset time is greater than or equal to 1 minute and less than or equal to 10 minutes; The sixth preset time is greater than or equal to 20 minutes and less than or equal to 60 minutes.

9. A hydrogen pipeline operation status monitoring device, characterized in that: include A delivery pipeline and a joint, wherein two adjacent delivery pipelines are connected via a joint; A monitoring device, the monitoring device comprising a hydrogen concentration detector, a displacement sensor and an alarm system, the hydrogen concentration detector being arranged on the outer surface of the joint, the hydrogen concentration detector being used to detect the hydrogen concentration at the outer surface of the joint, the displacement sensor being used to detect the displacement change value between the connected joint and the delivery pipeline; wherein, When it is detected that the value of the hydrogen concentration data at the outer surface of the joint is greater than or equal to a first preset value, the alarm system sends out an alarm signal; When it is detected that the value of the hydrogen concentration data at the outer surface of the joint is less than the first preset value, and the displacement change value between the joint and the delivery pipeline connected thereto is greater than or equal to the second preset value, the alarm system sends a warning signal or an alarm signal.

10. The hydrogen pipeline operation status monitoring device according to claim 9, characterized in that: The alarm system includes an audible and visual alarm arranged on the outer surface of the joint and an alarm device arranged in the control room; The delivery pipeline is a non-metallic pipeline, and the joint is a metal joint; The hydrogen concentration detector is arranged on the top of the joint; The resolution of the hydrogen concentration detector is less than or equal to 2 ppm; The displacement sensor is located on the outer surface of the joint, and the displacement sensor includes at least one of a wire encoder, a grating ruler, a capacitive grating ruler and a laser sensor; The hydrogen pipeline operation status monitoring device comprises a measurement system, wherein the measurement system comprises at least one of a first temperature measuring instrument, a pressure measuring instrument, a second temperature measuring instrument and a hygrometer; The first temperature measuring instrument is used to detect the temperature value of the hydrogen in the delivery pipeline; The pressure measuring instrument is used to detect the hydrogen pressure value in the delivery pipeline; The second temperature measuring instrument is arranged on the outer surface of the joint, and the second temperature measuring instrument is used to detect the surface temperature value of the joint; The hygrometer is arranged on the outer surface of the joint, and is used to detect the humidity value on the outer surface of the joint.

Images