Integrated equipment for testing hydrogen permeation and pressure regulating performance of full-size pressure regulator

Abstract

The utility model discloses a full-size pressure regulator hydrogen permeation and pressure regulating performance testing integrated device which comprises a testing device main body, a pressure regulator, a vacuum pump, a pressure reading instrument, a gas chromatograph and a pipe sleeve are arranged in the testing device main body, a gas inlet system is further arranged on one side of the testing device main body, and a gas outlet system is further arranged on the other side of the testing device main body. External gas enters the pressure regulator through the gas inlet system, the gas inlet system is communicated with the pressure regulator through the first conical flange, the hydrogen permeability coefficient of hydrogen-doped natural gas in the pressure regulator is measured through gas chromatography, the pressure regulator can work for a long time, the pressure regulating performance of the pressure regulator in a hydrogen environment can be researched, and the pressure regulating performance of the pressure regulator is improved. The device can test the hydrogen permeability of a full-size pressure regulator, can also test the pressure regulating performance of the pressure regulator in a hydrogen environment, can test the permeability of pure gas (pure hydrogen) and mixed gas (hydrogen-doped natural gas) in the pressure regulator, and can also carry out a pressure regulating performance test experiment.

Description

Technical Field

[0001] This utility model relates to the field of gas permeation performance testing technology, specifically to an integrated device for testing hydrogen permeation and pressure regulation performance of a full-size pressure regulator. Background Technology

[0002] Hydrogen is a clean energy source with zero carbon emissions after combustion, and vigorously promoting the use of hydrogen energy is beneficial to reducing carbon emissions. Incorporating hydrogen into urban gas is an important way to achieve large-scale utilization of hydrogen energy, which helps reduce the use of natural gas and thus reduce carbon emissions. Urban gas transmission requires step-by-step pressure regulation, and hydrogen may permeate into the regulator. Excessive hydrogen permeation can easily lead to energy loss and waste, and in enclosed spaces, it may also form hydrogen accumulation, causing risks such as combustion and explosion. Furthermore, the presence of hydrogen may affect the pressure regulation accuracy of the regulator. Therefore, it is necessary to consider hydrogen permeation in the regulator and the pressure regulation performance of the regulator in hydrogen-rich environments.

[0003] For example, a testing device and method for the gas permeability of full-size non-metallic pipes (Announcement No.: CN10367480B) includes a pipe sealing system for sealing the test pipe sample, a metal test chamber for placing the test pipe sample, the test pipe sample being connected to a gas supply system, a cavity space formed between the metal test chamber and the test pipe sample being connected to a pressure acquisition system, and the cavity space and the test pipe sample being connected to a vacuum pump. This application has the advantages of high test pressure, large test pipe thickness, and short test time.

[0004] Based on existing technology, it has been found that only the permeability of pure gas in non-metallic pipelines can be tested. It cannot test the permeability of single-component gas in mixed gas at pipeline connections and pressure regulators, nor can it test the pressure regulation performance of pressure regulators in hydrogen-containing environments. Therefore, we need to propose an integrated device for testing the hydrogen permeation and pressure regulation performance of full-size pressure regulators. Utility Model Content

[0005] The purpose of this invention is to provide an integrated device for testing hydrogen permeation and pressure regulation performance in a full-size pressure regulator. It can test the permeation of pure gas (pure hydrogen) and mixed gas (hydrogen-blended natural gas) in the pressure regulator, and can also conduct pressure regulation performance testing experiments to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides an integrated device for testing the hydrogen permeation and pressure regulation performance of a full-size pressure regulator, including a main body of the testing device. The main body of the testing device is equipped with a pressure regulator, a vacuum pump, a pressure reading instrument, a gas chromatograph, and a tubing. An air intake system is also provided on one side of the main body of the testing device, which allows external gas to enter the interior of the pressure regulator. The air intake system and the pressure regulator are connected through a first conical flange.

[0007] The sleeve is fitted over the outside of the pressure regulator, forming a sealed cavity between the sleeve and the pressure regulator. The pressure reading instrument and the gas chromatograph are both located inside the sealed cavity to detect the gas permeability coefficient.

[0008] Preferably, the air intake system includes a three-way pipe, a first air intake pipe, a second air intake pipe, an air delivery pipe, a first valve, a second valve, a third valve, and a first pressure gauge, wherein one end of the first air intake pipe, the second air intake pipe, and the air delivery pipe are respectively fixedly connected to the three ends of the three-way pipe.

[0009] Preferably, the first valve is located on the outer wall of the first air intake pipe, the second valve is located on the outer wall of the second air intake pipe, and the third valve and the first pressure gauge are both located on the outer wall of the air delivery pipe.

[0010] Preferably, one end of the gas transmission pipe passes through the sleeve and is connected to the first conical flange, and one end of the pressure regulator is connected to the other end of the first conical flange.

[0011] Preferably, a second conical flange is fixedly installed at the other end of the pressure regulator, and an exhaust pipe is fixedly connected to one end of the second conical flange. One end of the exhaust pipe passes through the sleeve and the main body of the test device in sequence and is located on one side of the main body of the test device. A fourth valve and a second pressure gauge are also provided on the outer wall of the exhaust pipe.

[0012] Preferably, the vacuum pump is installed inside the main body of the testing device. The suction end of the vacuum pump is fixedly connected to a suction pipe, one end of which is connected to a sleeve. The outlet end of the vacuum pump is fixedly connected to an outlet pipe, one end of which passes through the main body of the testing device and is connected to the outside.

[0013] Preferably, a CNC panel is also fixedly installed on the main body of the testing device, and the CNC panel is electrically connected to each component through wires.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention measures the hydrogen permeation coefficient of hydrogen-blended natural gas in a pressure regulator using gas chromatography. It can operate for extended periods to study the pressure regulation performance of the pressure regulator in a hydrogen-rich environment. It can test the hydrogen permeation performance of a full-size pressure regulator while simultaneously testing its pressure regulation performance in a hydrogen-rich environment. It can test the permeation of pure gas (pure hydrogen) and mixed gas (hydrogen-blended natural gas) in the pressure regulator and also conduct pressure regulation performance testing experiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the main body of the testing device of this utility model;

[0018] Figure 3 This is a schematic diagram of the air intake system of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the sealing cavity of this utility model.

[0020] In the diagram: 1. Main body of the testing device; 2. Pressure regulator; 3. Vacuum pump; 4. Pressure reading instrument; 5. Tubing sleeve; 6. Air intake system; 61. T-joint; 62. First air intake pipe; 63. Second air intake pipe; 64. Air delivery pipe; 65. First valve; 66. Second valve; 67. Third valve; 68. First pressure gauge; 7. CNC panel; 8. First conical flange; 9. Second conical flange; 10. Exhaust pipe; 11. Second pressure gauge; 12. Intake pipe; 13. Outlet pipe; 14. Fourth valve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides an integrated device for testing the hydrogen permeation and pressure regulation performance of a full-size pressure regulator, including a main body 1 of the testing device. The main body 1 of the testing device contains a pressure regulator 2, a vacuum pump 3, a pressure reading instrument 4, a gas chromatograph, and a tube sleeve 5. An air intake system 6 is also provided on one side of the main body 1. The air intake system 6 allows external gas to enter the interior of the pressure regulator 2. The air intake system 6 and the pressure regulator 2 are connected by a first conical flange 8.

[0023] The sleeve 5 is fitted outside the pressure regulator 2, forming a sealed cavity between the sleeve 5 and the pressure regulator 2. The pressure reading instrument 4 and the gas chromatograph are both located inside the sealed cavity to detect the gas permeability coefficient. It is worth noting that the gas chromatography spectrum is not shown in the diagram. The gas chromatography spectrum can be a customized Agilent 7890B+ detection system, the pressure regulator 2 can be a Honeywell 63EG series high differential pressure regulator, and the pressure reading instrument 4 can be an MKS Baratron 626B model. All of these are existing technologies, and their specific working principles and wiring connections will not be elaborated on here.

[0024] In this embodiment, the intake system 6 allows pure gas (pure hydrogen) and mixed gas (hydrogen-blended natural gas) to enter the interior of the pressure regulator 2, and the sleeve 5 allows the permeating gas to enter the sealed cavity for testing.

[0025] The air intake system 6 includes a three-way pipe 61, a first air intake pipe 62, a second air intake pipe 63, an air delivery pipe 64, a first valve 65, a second valve 66, a third valve 67, and a first pressure gauge 68. One end of the first air intake pipe 62, the second air intake pipe 63, and the air delivery pipe 64 are respectively fixedly connected to the three ends of the three-way pipe 61.

[0026] In this embodiment, the first intake pipe 62 should be connected to an external hydrogen or hydrogen-blended natural gas pipeline, the second intake pipe 63 should be connected to an external nitrogen pipeline, and the gas delivery pipe 64 should be connected to the exhaust end of the three-way pipe 61.

[0027] The first valve 65 is located on the outer wall of the first air intake pipe 62, the second valve 66 is located on the outer wall of the second air intake pipe 63, and the third valve 67 and the first pressure gauge 68 are both located on the outer wall of the air delivery pipe 64.

[0028] One end of the gas pipeline 64 passes through the sleeve 5 and is connected to the first conical flange 8, and one end of the pressure regulator 2 is connected to the other end of the first conical flange 8.

[0029] The other end of the pressure regulator 2 is fixedly installed with a second conical flange 9. One end of the second conical flange 9 is fixedly connected to an exhaust pipe 10. One end of the exhaust pipe 10 passes through the sleeve 5 and the main body 1 of the test device in sequence and is located on one side of the main body 1 of the test device. A fourth valve 14 and a second pressure gauge 11 are also provided on the outer wall of the exhaust pipe 10.

[0030] In this embodiment, the gas regulated by the pressure regulator 2 is discharged through the exhaust pipe 10, and its pressure value is measured by the second pressure gauge 11.

[0031] In an optional embodiment, sealing clamps may be fitted onto the outer walls of both the first tapered flange 8 and the second tapered flange 9 to improve the sealing performance of the sealing cavity.

[0032] Vacuum pump 3 is installed inside the main body 1 of the test device. The suction end of vacuum pump 3 is fixedly connected to suction pipe 12. One end of suction pipe 12 is connected to sleeve 5. The outlet end of vacuum pump 3 is fixedly connected to outlet pipe 13. One end of outlet pipe 13 passes through the main body 1 of the test device and is connected to the outside.

[0033] In this embodiment, the vacuum pump 3 draws in air from inside the sealed cavity through the suction pipe 12 and discharges it through the exhaust pipe 13, thereby creating a vacuum inside the sealed cavity, which facilitates the detection of permeated gas.

[0034] The main body 1 of the testing device is also fixedly installed with a CNC panel 7. The CNC panel 7 is electrically connected to each component through wires. The use of each component is controlled by the CNC panel 7, and the results of the pressure reading instrument 4 and the colorimetric gas spectrum are read.

[0035] The operation of this application is as follows:

[0036] (1) Close the first valve 65 and open the third valve;

[0037] (2) Close the fourth valve 14, open the second valve 66, and fill the pipeline with 0.2MPa of nitrogen gas;

[0038] (3) Close the second valve and open the fourth valve 14 to purge the nitrogen and air mixture inside the pipeline;

[0039] (4) Repeat steps (2) and (3) at least 5 times to purge the air from the pipe;

[0040] (5) Close the fourth valve 14, open the first valve 65, and fill the pipeline with 0.4MPa of hydrogen / hydrogen-blended natural gas;

[0041] (6) Close valve 1 and open valve 4 to purge the mixture of hydrogen / hydrogen-blended natural gas and nitrogen inside the pipeline;

[0042] (7) Repeat steps (5) and (6) at least 5 times to purge the nitrogen from the pipe and close the fourth valve 14;

[0043] (8) Start vacuum pump 3 to evacuate the sealed cavity between pressure regulator 2 and sleeve 5 to a vacuum, with an absolute pressure ≤20kPa;

[0044] (9) Open the first valve 65 and the third valve 67 to fill the pipeline with hydrogen / hydrogen-blended natural gas at the required experimental pressure, and close the second valve 66.

[0045] (10) When the pressure reaches the required test pressure, start recording the data of the second pressure gauge 11, and at the same time start the pressure reading instrument 4 to record the pressure change in the sealed cavity at all times.

[0046] (11) Start the permeation and pressure regulation performance test experiment. The working time is the time required for the experiment.

[0047] (12) After the experiment, based on the pressure-time curve recorded by the pressure reading instrument 4 and the analysis results of gas chromatography, the permeation coefficient of hydrogen in the pressure regulator 2 under the experimental temperature and pressure can be calculated. Based on the changes in the data of the first pressure gauge 68 and the second pressure gauge 11, the working performance of the pressure regulator 2 can be analyzed.

[0048] It is worth noting that the pipes mentioned in the operation steps are the pipes connected by the tee and the exhaust pipe 10 in this application.

[0049] The working principle of this utility model is as follows: When in use, the hydrogen permeation coefficient of hydrogen-blended natural gas in the pressure regulator 2 is measured by gas chromatography, and it can work for a long time to study the pressure regulating performance of the pressure regulator 2 in a hydrogen-containing environment. It can test the hydrogen permeation performance of the full-size pressure regulator 2 at the same time, and can also test the pressure regulating performance of the pressure regulator 2 in a hydrogen-containing environment. It can test the permeation of pure gas (pure hydrogen) and mixed gas (hydrogen-blended natural gas) in the pressure regulator 2, and can also conduct pressure regulating performance test experiments.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated device for testing hydrogen permeation and pressure regulation performance of a full-size pressure regulator, characterized in that: The test device includes a main body (1), inside which are installed a pressure regulator (2), a vacuum pump (3), a pressure reading instrument (4), a gas chromatograph and a tube sleeve (5). An air intake system (6) is also provided on one side of the main body (1). The air intake system (6) allows external gas to enter the interior of the pressure regulator (2). The air intake system (6) and the pressure regulator (2) are connected by a first conical flange (8). The sleeve (5) is fitted over the outside of the pressure regulator (2), and a sealed cavity is formed between the sleeve (5) and the pressure regulator (2). The pressure reading instrument (4) and the gas chromatograph are both set inside the sealed cavity to detect the permeability coefficient of the gas.

2. The integrated equipment for testing hydrogen permeation and pressure regulation performance of a full-size pressure regulator as described in claim 1, characterized in that: The air intake system (6) includes a three-way pipe (61), a first air intake pipe (62), a second air intake pipe (63), an air delivery pipe (64), a first valve (65), a second valve (66), a third valve (67), and a first pressure gauge (68). One end of the first air intake pipe (62), the second air intake pipe (63), and the air delivery pipe (64) are respectively fixedly connected to the three ends of the three-way pipe (61).

3. The integrated equipment for testing hydrogen permeation and pressure regulation performance of a full-size pressure regulator as described in claim 2, characterized in that: The first valve (65) is located on the outer wall of the first air inlet pipe (62), the second valve (66) is located on the outer wall of the second air inlet pipe (63), and the third valve (67) and the first pressure gauge (68) are both located on the outer wall of the air delivery pipe (64).

4. The integrated equipment for testing hydrogen permeation and pressure regulation performance of a full-size pressure regulator as described in claim 3, characterized in that: One end of the gas pipeline (64) passes through the sleeve (5) and is connected to the first conical flange (8), and one end of the pressure regulator (2) is connected to the other end of the first conical flange (8).

5. The integrated equipment for testing hydrogen permeation and pressure regulation performance of a full-size pressure regulator as described in claim 1, characterized in that: The other end of the pressure regulator (2) is fixedly installed with a second conical flange (9), and one end of the second conical flange (9) is fixedly connected to an exhaust pipe (10). One end of the exhaust pipe (10) passes through the sleeve (5) and the main body of the test device (1) in sequence and is located on one side of the main body of the test device (1). A fourth valve (14) and a second pressure gauge (11) are also provided on the outer wall of the exhaust pipe (10).

6. The integrated equipment for testing hydrogen permeation and pressure regulation performance of a full-size pressure regulator as described in claim 1, characterized in that: The vacuum pump (3) is installed inside the main body (1) of the test device. The suction end of the vacuum pump (3) is fixedly connected to the suction pipe (12). One end of the suction pipe (12) is connected to the sleeve (5). The outlet end of the vacuum pump (3) is fixedly connected to the outlet pipe (13). One end of the outlet pipe (13) passes through the main body (1) of the test device and is connected to the outside.

7. The integrated equipment for testing hydrogen permeation and pressure regulation performance of a full-size pressure regulator as described in claim 1, characterized in that: The main body (1) of the testing device is also fixedly installed with a CNC panel (7), and the CNC panel (7) is electrically connected to each component through wires.

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