Testing device for online examination of hydrogen conveying pipeline

Abstract

The utility model discloses a test device for online examination of a hydrogen transmission pipeline, which comprises a main pipeline and a branch test pipeline which are connected in parallel, and the gas inlet end and the gas outlet end of the branch test pipeline are both communicated with the main pipeline. According to the utility model, the test device for examining the hydrogen conveying pipeline is established on the actual main pipeline for conveying hydrogen, so that the examination and test of the hydrogen conveying pipeline in the actual hydrogen conveying environment can be conveniently realized.

Description

Technical Field

[0001] This utility model belongs to the field of hydrogen pipeline testing technology, specifically relating to an online testing device for hydrogen pipelines. Background Technology

[0002] Hydrogen energy boasts abundant resources, is green and low-carbon, and has wide applications. Hydrogen storage, acting as a link and bridge between hydrogen production and consumption, is crucial for the sustainable development of the entire hydrogen energy industry chain. Pipeline transportation, with its advantages of large-scale hydrogen transport capacity, low energy consumption, and low cost, is an important method for achieving large-scale, long-distance hydrogen transportation. Due to the risk of hydrogen damage to pipelines under high-pressure hydrogen environments, the selection of pipe materials is critical for large-scale hydrogen transportation. Safe and economical hydrogen transportation is one of the key aspects of hydrogen energy development. Given my country's vast territory and the generally long physical distance between hydrogen production and consumption sites, pipeline transportation is the optimal approach for large-scale, economical hydrogen energy transportation in the future.

[0003] At present, my country's pipeline natural gas transportation technology is relatively mature. However, hydrogen has physical and chemical properties such as easy leakage, flammability and explosiveness. There are many types of candidate pipeline materials. Hydrogen transportation through pipelines will generate a series of new technical and safety issues. At present, the application of hydrogen pipeline transportation mainly faces the following problems: (1) Hydrogen molecules are small and diffuse quickly. When transporting hydrogen through pipelines, there is a greater risk of hydrogen leakage; (2) Hydrogen has low ignition energy and is flammable and explosive. Leaked hydrogen will accumulate in a limited space and cause great safety hazards. If it encounters an open flame, it will cause serious damage to the surrounding life and property; (3) There are compatibility issues between hydrogen pipelines and hydrogen, and hydrogen damage to materials; (4) The pipeline has a wide pressure range, and the temperature and load environment are variable. The service conditions are complex, which poses great challenges to pipeline prediction and control.

[0004] Austenitic stainless steel has excellent hydrogen resistance, but its pipes are expensive and unsuitable for large-scale, long-distance hydrogen transportation. Carbon steel and low-alloy steel are much cheaper than austenitic stainless steel, but their hydrogen resistance is even worse. Therefore, hydrogen damage to carbon steel and low-alloy steel pipe materials is a key concern. To determine the actual impact of hydrogen on pipe materials, testing should be conducted in a real hydrogen transportation environment, but currently, relevant testing equipment is lacking. Utility Model Content

[0005] To address the aforementioned issues, this invention provides an online testing device for hydrogen transport pipelines. This device is installed on an actual main hydrogen transport pipeline to facilitate testing and evaluation of the pipeline under real hydrogen transport conditions.

[0006] The embodiments of this utility model are achieved through the following technical solutions:

[0007] An online testing device for evaluating hydrogen transport pipelines includes a main pipeline and branch test pipelines connected in parallel, wherein the inlet and outlet ends of the branch test pipelines are both connected to the main pipeline.

[0008] In one embodiment of this utility model, the branch test pipeline includes a test pipe, a tapered transition joint, and a connecting pipe. The tapered transition joint is disposed at both ends of the test pipe. The larger diameter end of the tapered transition joint is connected to the test pipe, and the smaller diameter end of the tapered transition joint is connected to the connecting pipe. The connecting pipe is connected to the main pipeline.

[0009] In one embodiment of the present invention, the test tube includes a test tube segment of one material or a test tube segment of at least two materials connected in series.

[0010] In one embodiment of this utility model, the connecting pipe is provided with a ball valve for purging airtightness test.

[0011] In one embodiment of this utility model, the main pipeline is provided with a branch inlet balloon valve and a branch outlet balloon valve. The branch inlet balloon valve is connected to the inlet end of the branch test pipeline, and the branch outlet balloon valve is connected to the outlet end of the branch test pipeline.

[0012] In one embodiment of the present invention, the branch test pipeline further includes several portal-shaped support frames for supporting the branch test pipeline.

[0013] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0014] This invention establishes a test device on an actual main hydrogen transport pipeline for evaluating the pipeline, which facilitates the evaluation and testing of the hydrogen transport pipeline under real hydrogen transport conditions. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the portal-shaped support frame in this utility model.

[0018] Icons: 1-Main line pipeline, 2-Branch test pipeline, 21-Test pipe, 22-Conical transition joint, 23-Connecting pipe, 31-Branch inlet balloon valve, 32-Branch outlet balloon valve, 4-Ball valve for air tightness test, 5-Gantry support frame. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that if terms such as "inner" or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "configure," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example

[0025] Please refer to Figure 1 and Figure 2This embodiment provides a test device for online testing of hydrogen transmission pipelines, comprising a main pipeline 1 and a branch test pipeline 2 connected in parallel. The inlet and outlet ends of the branch test pipeline 2 are both connected to the main pipeline 1. Specifically, the main pipeline 1 is equipped with a branch inlet ball valve 31 and a branch outlet ball valve 32. The branch inlet ball valve 31 is connected to the inlet end of the branch test pipeline 2, and the branch outlet ball valve 32 is connected to the outlet end of the branch test pipeline 2. The main pipeline 1 is also equipped with a first control valve and a second control valve, both of which are ball valves. The branch test pipeline 2 includes a test pipe 21, a tapered transition joint 22, and a connecting pipe 23. The tapered transition joint 22 is located at both ends of the test pipe 21. The larger diameter end of the tapered transition joint 22 is connected to the test pipe 21, and the smaller diameter end of the tapered transition joint 22 is connected to the connecting pipe 23. The connecting pipe 23 is connected to the branch inlet ball valve 31 and the branch outlet ball valve 32 of the main pipeline 1. The test device with the above structure in this embodiment can be used to build a test device for evaluating hydrogen transportation pipelines on the actual main hydrogen transportation pipeline 1. Moreover, the main pipeline 1 and the branch pipeline are connected in parallel, which facilitates the evaluation and testing of hydrogen transportation pipelines under real hydrogen transportation environment.

[0026] In this embodiment, the test tube 21 can be a single-material test tube segment, such as a 20# pipe. Alternatively, the test tube 21 can be a series connection of at least two materials, such as a 20# pipe, an L245 pipe, and a 42 pipe connected in series. These three pipes can be connected by welding or by flanges. Of course, the test tube 21 can also be a parallel connection of multiple materials, such as a 20# pipe, an L245 pipe, and a 42 pipe connected in parallel. This embodiment, using the above-described test device, can establish a test device for evaluating hydrogen transport pipelines with multiple pipe materials on the actual main hydrogen transport pipeline 1.

[0027] In this embodiment, the test apparatus incorporates a valve for ventilation, namely, a ball valve 4 for purging air tightness test is installed on the connecting pipe 23 to facilitate the replacement and purging of hydrogen on the test platform.

[0028] In this embodiment, the branch test pipeline 2 also includes several portal-shaped support frames 5 for supporting the branch test pipeline 2, and the portal-shaped support frames 5 are fixed to the branch test pipeline 2 by clamps and the outer wall is painted to protect it.

[0029] In actual testing, after the branch test pipeline 2 has been running for a certain period of time, it is removed from the test device for destructive testing and compared with its original state to understand its compatibility characteristics with hydrogen. In addition, a hydrogen detection alarm instrument is installed at the test device location. When hydrogen leaks, the branch inlet valve 31 and the branch outlet valve 32 connected to the test section can be directly closed to block hydrogen from passing through the test section.

[0030] This invention establishes a test device on the actual main hydrogen transport pipeline 1 for evaluating the hydrogen transport pipeline, which facilitates the evaluation and testing of the hydrogen transport pipeline under real hydrogen transport environment.

[0031] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A test apparatus for online evaluation of hydrogen transport pipelines, characterized in that, It includes a main pipeline and a branch test pipeline connected in parallel, wherein the air inlet and outlet of the branch test pipeline are both connected to the main pipeline.

2. The test apparatus for online testing of hydrogen transport pipelines according to claim 1, characterized in that, The branch test pipeline includes a test pipe, a tapered transition joint, and a connecting pipe. The tapered transition joint is located at both ends of the test pipe. The larger diameter end of the tapered transition joint is connected to the test pipe, and the smaller diameter end of the tapered transition joint is connected to the connecting pipe, which is connected to the main pipeline.

3. The test apparatus for online testing of hydrogen transport pipelines according to claim 2, characterized in that, The test tube includes a test tube segment made of one material or a test tube segment made of at least two materials connected in series.

4. The test apparatus for online testing of hydrogen transport pipelines according to claim 2, characterized in that, The connecting pipe is equipped with a ball valve for purging airtightness testing.

5. The test apparatus for online testing of hydrogen transport pipelines according to claim 1, characterized in that, The main pipeline is equipped with a branch inlet balloon valve and a branch outlet balloon valve. The branch inlet balloon valve is connected to the inlet end of the branch test pipeline, and the branch outlet balloon valve is connected to the outlet end of the branch test pipeline.

6. The test apparatus for online testing of hydrogen transport pipelines according to claim 1, characterized in that, The branch test pipeline also includes several portal-shaped support frames for supporting the branch test pipeline.

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