Natural gas hydrogen blending pipeline monitoring device

Abstract

The utility model provides a kind of natural gas hydrogen mixing pipeline monitoring device, comprising: monitoring hole 2 is opened on natural gas conveying pipeline 1, monitoring space is set at the monitoring hole 2, first electromagnetic valve 3 and the valve 8 controlled by first electromagnetic valve are sequentially set from the monitoring space upper direction natural gas conveying pipeline 1 direction, second electromagnetic valve 4 and the valve 9 controlled by second electromagnetic valve and third electromagnetic valve 5 and the valve 10 controlled by third electromagnetic valve, the monitoring space is divided into monitoring upper cavity 11 and monitoring lower cavity 12, and hydrogen sensor 6 and methane sensor 7 are set on the monitoring upper cavity 11 inner wall.The natural gas hydrogen mixing pipeline monitoring device provided by the utility model can conveniently set sensor, and sensitively monitor the natural gas condition conveyed in natural gas conveying pipeline, improve the precision of monitoring.

Description

Technical Field

[0001] This utility model relates to the field of natural gas leak monitoring technology, and in particular to a monitoring device for natural gas hydrogen-blended pipelines. Background Technology

[0002] With the increasing global demand for low-carbon and efficient energy utilization, hydrogen blending technology for natural gas has become a key technology for achieving energy transition and emission reduction goals. However, the small size, rapid diffusion, flammability, and explosiveness of hydrogen molecules make its safety a critical factor restricting its large-scale application. This necessitates higher requirements for monitoring the concentration of hydrogen-blended natural gas in pipelines. Currently, monitoring devices for hydrogen-blended natural gas pipelines often only have sensors installed inside the pipeline, which are insufficiently sensitive due to the flow of the gas. Furthermore, installing multiple sensors inside the pipeline is inconvenient. Therefore, designing a sensitive and convenient monitoring device for the natural gas conditions within pipelines has become an urgent problem to be solved. Utility Model Content

[0003] The present invention aims to provide a monitoring device for natural gas hydrogen blending pipelines that overcomes or at least partially solves the above-mentioned problems.

[0004] To achieve the above objectives, the technical solution of this utility model is specifically implemented as follows:

[0005] This utility model provides a monitoring device for natural gas hydrogen blending pipelines, comprising:

[0006] A monitoring hole 2 is opened on the natural gas transmission pipeline 1, and a monitoring space is set at the monitoring hole 2. A first solenoid valve 3 and a valve 8 controlled by the first solenoid valve, a second solenoid valve 4 and a valve 9 controlled by the second solenoid valve, and a third solenoid valve 5 and a valve 10 controlled by the third solenoid valve are sequentially arranged from the top of the monitoring space toward the natural gas transmission pipeline 1. The monitoring space is divided into an upper monitoring chamber 11 and a lower monitoring chamber 12, and a hydrogen sensor 6 and a methane sensor 7 are installed on the inner wall of the upper monitoring chamber 11.

[0007] Optionally, the device further includes a pressure sensor 13 disposed on the pipeline.

[0008] Optionally, in the unmonitored state, the first solenoid valve 3 opens the valve 8 controlled by the first solenoid valve, the third solenoid valve 5 opens the valve 10 controlled by the third solenoid valve, the upper monitoring chamber 11 is connected to air, and the lower monitoring chamber 12 is connected to the natural gas transmission pipeline 1.

[0009] Optionally, during the monitoring state, the first solenoid valve 3 closes the valve 8 controlled by the first solenoid valve, and the third solenoid valve 5 closes the valve 10 controlled by the third solenoid valve. After stabilization, the second solenoid valve 4 opens the valve 9 controlled by the second solenoid valve, and the air in the upper monitoring chamber 11 mixes with the gas in the lower monitoring chamber 12.

[0010] Therefore, the natural gas hydrogen-blended pipeline monitoring device provided by this utility model can easily install sensors and sensitively monitor the natural gas transported in the pipeline, thereby improving the monitoring accuracy. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 A schematic diagram of the structure of the natural gas hydrogen blending pipeline monitoring device provided in this embodiment of the utility model. Detailed Implementation

[0013] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0014] Figure 1 A schematic diagram of the structure of the natural gas hydrogen blending pipeline monitoring device provided in an embodiment of this utility model is shown. See also: Figure 1 The natural gas hydrogen blending pipeline monitoring device provided in this embodiment includes:

[0015] A monitoring hole 2 is opened on the natural gas transmission pipeline 1, and a monitoring space is set at the monitoring hole 2. A first solenoid valve 3 and a valve 8 controlled by the first solenoid valve, a second solenoid valve 4 and a valve 9 controlled by the second solenoid valve, and a third solenoid valve 5 and a valve 10 controlled by the third solenoid valve are sequentially arranged from the top of the monitoring space toward the natural gas transmission pipeline 1. The monitoring space is divided into an upper monitoring chamber 11 and a lower monitoring chamber 12, and a hydrogen sensor 6 and a methane sensor 7 are installed on the inner wall of the upper monitoring chamber 11.

[0016] As an optional embodiment of the present invention, the natural gas hydrogen blending pipeline monitoring device provided in this embodiment of the present invention further includes: a pressure sensor 13 installed on the pipeline.

[0017] As an optional embodiment of this utility model, in the unmonitored state, the first solenoid valve 3 opens the valve 8 controlled by the first solenoid valve, the third solenoid valve 5 opens the valve 10 controlled by the third solenoid valve, the upper monitoring chamber 11 is connected to air, and the lower monitoring chamber 12 is connected to the natural gas transmission pipeline 1.

[0018] As an optional embodiment of this utility model, in the monitoring state, the first solenoid valve 3 closes the valve 8 controlled by the first solenoid valve, and the third solenoid valve 5 closes the valve 10 controlled by the third solenoid valve. After stabilization, the second solenoid valve 4 opens the valve 9 controlled by the second solenoid valve, and the air in the upper monitoring chamber 11 mixes with the gas in the lower monitoring chamber 12.

[0019] In specific implementation, the working process of the natural gas hydrogen blending pipeline monitoring device provided in this utility model embodiment is as follows:

[0020] In the unmonitored state, solenoid valve 3 opens valve 8, making valve 8 open, and solenoid valve 5 opens valve 10, making valve 10 open. At this time, the upper monitoring chamber 11 is connected to air and filled with air, while the lower monitoring chamber 12 is connected to the gas pipeline and filled with gas. During monitoring, a program can be set to perform monitoring at regular intervals, such as every 2 hours (or longer). At the start of monitoring, solenoid valve 3 closes valve 8, and solenoid valve 5 closes valve 10. After stabilization, solenoid valve 4 opens valve 9. At this time, the air in the upper monitoring chamber 11 mixes with the gas in the lower monitoring chamber 12. After uniform mixing, the readings of the methane sensor 7 and hydrogen sensor 6 installed on the inner wall of the upper monitoring chamber can be read. This allows for convenient monitoring of the concentration of methane and hydrogen in the pipeline by the backend system, determining whether the gas being transported in the pipeline meets the user's needs.

[0021] In addition, this invention can facilitate the backend reading of the pipeline pressure sensor 13, thereby determining whether the pipeline pressure is normal.

[0022] Furthermore, the natural gas hydrogen blending pipeline monitoring device provided in this embodiment can also transmit and store the concentrations of methane and hydrogen in the pipeline, as well as the pressure in the pipeline, to the background data processing unit so that the background data processing unit can analyze and process the data and issue an alarm.

[0023] Therefore, the natural gas hydrogen-blended pipeline monitoring device provided by this utility model embodiment can easily install sensors and sensitively monitor the natural gas transported in the natural gas pipeline, thereby improving the monitoring accuracy.

[0024] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A monitoring device for a natural gas pipeline blending with hydrogen, characterized in that, include: A monitoring hole (2) is opened on the natural gas transmission pipeline (1), and a monitoring space is set at the monitoring hole (2). A first solenoid valve (3) and a valve (8) controlled by the first solenoid valve, a second solenoid valve (4) and a valve (9) controlled by the second solenoid valve, and a third solenoid valve (5) and a valve (10) controlled by the third solenoid valve are sequentially arranged from the top of the monitoring space toward the natural gas transmission pipeline (1). The monitoring space is divided into an upper monitoring chamber (11) and a lower monitoring chamber (12). A hydrogen sensor (6) and a methane sensor (7) are set on the inner wall of the upper monitoring chamber (11).

2. The apparatus according to claim 1, characterized in that, Also includes: A pressure sensor (13) is installed on the pipeline.

3. The apparatus according to claim 2, characterized in that, When not under monitoring, the first solenoid valve (3) opens the valve (8) controlled by the first solenoid valve, the third solenoid valve (5) opens the valve (10) controlled by the third solenoid valve, the upper monitoring chamber (11) is connected to the air, and the lower monitoring chamber (12) is connected to the natural gas transmission pipeline (1).

4. The apparatus according to claim 3, characterized in that, During the monitoring state, the first solenoid valve (3) closes the valve (8) controlled by the first solenoid valve, and the third solenoid valve (5) closes the valve (10) controlled by the third solenoid valve. After stabilization, the second solenoid valve (4) opens the valve (9) controlled by the second solenoid valve, and the air in the upper monitoring chamber (11) mixes with the gas in the lower monitoring chamber (12).

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