Pressure regulating valve testing device

Abstract

The invention discloses a pressure regulating valve testing device, and belongs to the technical field of pipeline hydrogen transmission, and the device comprises a gas transmission pipeline which comprises a main path, a first branch, a second branch and a third branch; the main path is connected with a gas source and is provided with a first regulating valve; the first branch circuit and the second branch circuit are connected to the main circuit at the same time; a first test position and a second regulating valve are sequentially arranged on the first branch; a second test position and a third regulating valve are sequentially arranged on the second branch; one end of the third branch is connected with the air outlet end of the second regulating valve, and the other end is connected with the air inlet end of the second test position; the monitoring assembly is used for acquiring temperature and pressure of air inlet / outlet ends of the first test position and the second test position, and the pipeline switching valve group is used for controlling on-off states of the first branch, the second branch and the third branch; according to the invention, a test environment with accurate pressure and flow can be provided for the to-be-tested equipment, primary pressure regulation or secondary pressure regulation is realized, and the test requirements of pressure regulation equipment with different calibers and different pressure grades are met.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of hydrogen pipeline transportation, in particular to a pressure regulating valve testing device. BACKGROUND

[0003] Pipeline hydrogen transportation is an effective way to realize large-scale hydrogen energy transportation and utilization. The pressure regulating valve is a core device in the pipeline hydrogen transportation process. At present, the adaptability of technical indicators such as regulating accuracy and response time of different types of pressure regulating valves to hydrogen transportation conditions is not clear. In order to efficiently promote large-scale application of hydrogen, ensure stable pressure transportation and use of hydrogen during hydrogen transportation and distribution, and avoid safety hazards of gas transportation, it is necessary to test whether the pressure regulating valve meets the requirements of hydrogen transportation and distribution.

[0004] At present, the testing of the pressure regulating valve mainly uses a hydrogen cylinder or a bottle group gas source, and the continuous gas supply capacity is weak. For a long time, the testing equipment cannot provide a stable pressure environment, and the working state of the tested valve receiving continuous stable pressure is prone to great misjudgment. At the same time, the conventional testing device cannot determine whether the low-pressure pressure regulating valve meets the use requirements of hydrogen transportation and distribution, which seriously restricts the target audience of hydrogen use. SUMMARY

[0005] The application provides a pressure regulating valve testing device, which aims to solve the problems of unstable testing environment pressure and inability to test low-pressure pressure regulating valves in the prior art.

[0006] The application provides a pressure regulating valve testing device, which comprises:

[0007] The gas pipeline comprises a main path, a first branch path, a second branch path and a third branch path.

[0008] The main path is connected with a gas source, and a first regulating valve is arranged on the main path. The input end of the first branch path and the input end of the second branch path are connected with the output end of the main path. A first test site and a second regulating valve are arranged on the first branch path in sequence along the gas inlet direction, and a first to-be-tested valve or a straight-through pipe is installed at the first test site. A second test site and a third regulating valve are arranged on the second branch path in sequence along the gas inlet direction, and a second to-be-tested valve is installed at the second test site. The input end of the third branch path is connected with the gas outlet end of the second regulating valve, and the output end of the third branch path is connected with the gas inlet end of the second test site.

[0009] A monitoring assembly is arranged on the first branch path and the second branch path, and is used for acquiring the temperature and pressure of the gas inlet end and the gas outlet end of the first test site and the gas inlet end and the gas outlet end of the second test site.

[0010] A pipeline switching valve group is arranged on the gas conveying pipeline, and is used to control the on-off state of the first branch, the second branch and the third branch, so that the gas in the main pipeline is conveyed along the first branch and / or the second branch, or is conveyed along the first branch, the third branch and the second branch in sequence.

[0011] Optionally, the pipeline switching valve group comprises a first inlet valve and a first outlet valve arranged at the input end and the output end of the first branch respectively, a second inlet valve and a second outlet valve arranged at the input end and the output end of the second branch respectively, and a third valve arranged on the third branch.

[0012] The input end of the third branch is located between the second regulating valve and the first outlet valve, and the output end of the third branch is located between the second inlet valve and the second test site.

[0013] Optionally, the monitoring assembly comprises a temperature assembly and a pressure assembly.

[0014] The temperature assembly is used to acquire the temperature of the gas inlet end and the gas outlet end of the first test site and the temperature of the gas inlet end and the gas outlet end of the second test site, and the pressure assembly is used to acquire the pressure of the gas inlet end and the gas outlet end of the first test site and the pressure of the gas inlet end and the gas outlet end of the second test site.

[0015] The pressure regulating valve testing device further comprises a station control system connected with the temperature assembly and the pressure assembly respectively, and used to receive and store the temperature and pressure information of the corresponding positions.

[0016] Optionally, the temperature assembly comprises a first temperature transmitter and a second temperature transmitter arranged at the gas inlet end and the gas outlet end of the first test site respectively, and a third temperature transmitter and a fourth temperature transmitter arranged at the gas inlet end and the gas outlet end of the second test site respectively.

[0017] The pressure assembly comprises a first pressure transmitter and a second pressure transmitter arranged at the gas inlet end and the gas outlet end of the first test site respectively, and a third pressure transmitter and a fourth pressure transmitter arranged at the gas inlet end and the gas outlet end of the second test site respectively.

[0018] Optionally, a safety valve is arranged on the main pipeline, and the safety valve is located at the gas outlet end of the first regulating valve.

[0019] Optionally, a safety cut-off valve and a pressure feedback pipeline are further arranged on the main pipeline, the safety cut-off valve is located at the gas inlet end of the first regulating valve, one end of the pressure feedback pipeline is connected with the safety cut-off valve, and the other end of the pressure feedback pipeline is connected to the gas outlet end of the first regulating valve.

[0020] The safety cut-off valve is used to obtain the pressure of the gas outlet end of the first regulating valve, and performs a closing action according to the pressure of the gas outlet end of the first regulating valve being greater than a preset pressure of the safety cut-off valve.

[0021] Optionally, the gas supply pipeline is provided with a first gas source inlet and a second gas source inlet; the first gas source inlet is arranged at the input end of the main pipeline, and the second gas source inlet is arranged at the input end of the first branch pipeline or the second branch pipeline.

[0022] Optionally, the input end of the main pipeline is provided with a fourth inlet valve, the output end of the main pipeline is provided with a fourth outlet valve, and the second gas source inlet is located at the gas outlet end of the fourth outlet valve.

[0023] Optionally, a first pressure gauge and a second pressure gauge are arranged at the gas inlet end and the gas outlet end of the first regulating valve, respectively.

[0024] Optionally, a gas recovery device is connected to the output end of the first branch pipeline and the output end of the second branch pipeline.

[0025] Beneficial effects:

[0026] The application provides a pressure regulating valve testing device, which comprises a gas supply pipeline, a monitoring assembly and a pipeline switching valve group. The gas supply pipeline comprises a main pipeline, a first branch pipeline, a second branch pipeline and a third branch pipeline. The main pipeline is connected to a gas source, and a first regulating valve is arranged on the main pipeline. The input end of the first branch pipeline and the input end of the second branch pipeline are connected to the output end of the main pipeline. A first test site and a second regulating valve are arranged on the first branch pipeline in sequence along the gas inlet direction, and a first valve to be tested or a straight-through pipe is arranged at the first test site. A second test site and a third regulating valve are arranged on the second branch pipeline in sequence along the gas inlet direction, and a second valve to be tested is arranged at the second test site. One end of the third branch pipeline is connected to the gas outlet end of the second regulating valve, and the other end is connected to the gas inlet end of the second test site. The first regulating valve, the second regulating valve and the third regulating valve can realize flow control and pressure control functions, so as to provide a precise pressure and flow testing environment for the valve to be tested, and the accuracy of the test results is ensured without being limited by the working conditions of the gas source. The pipeline switching valve group can switch the gas delivery path, realize one-stage pressure regulation or multi-stage pressure regulation, simultaneously test valves to be tested with different diameters, and test valves to be tested with different pressure grades, so as to meet the testing requirements of various pressure regulating valves. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without any creative labor.

[0028] Figure 1 is a structural schematic diagram of a pressure regulating valve testing device according to an embodiment of the present application;

[0029] Figure 2 is a gas path schematic diagram of a pressure regulating valve testing device according to an embodiment of the present application when testing a device to be tested in a high-pressure environment;

[0030] Figure 3 is a gas path schematic diagram of a pressure regulating valve testing device according to an embodiment of the present application when testing a device to be tested in a medium-low pressure environment.

[0031] Legend of reference signs:

[0032] a, main path; b, first branch; c, second branch; d, third branch; e, pressure feedback pipeline; A, first gas source inlet; B, second gas source inlet;

[0033] 01, fourth inlet valve; 02, safety cut-off valve; 03, first regulating valve; 04, fourth outlet valve; 05, first inlet valve; 06, second regulating valve; 07, first outlet valve; 08, second inlet valve; 09, third regulating valve; 10, second outlet valve; 11, third valve; 12, control valve for safety valve; 13, safety valve; 14, first maintenance valve group; 15, second maintenance valve group; 16, third maintenance valve group; 21, first test site; 22, second test site;

[0034] T1, first temperature transmitter; T2, second temperature transmitter; T3, third temperature transmitter; T4, fourth temperature transmitter; P1, first pressure gauge; P2, fifth pressure transmitter; P3, second pressure gauge; P4, first pressure transmitter; P5, second pressure transmitter; P6, third pressure gauge; P7, third pressure transmitter; P8, fourth pressure transmitter; P9, fourth pressure gauge. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative labor are within the protection scope of the present application.

[0036] In the related art, pipeline hydrogen transportation is an effective way to realize large-scale hydrogen energy transportation and utilization. The pressure regulating valve is a core device in the pipeline hydrogen transportation process. At present, the adaptability of technical indicators such as the regulating accuracy and response time of different types of pressure regulating valves to hydrogen transportation working conditions is not clear. In order to efficiently promote the large-scale application of hydrogen, ensure the stable pressure transportation and use of hydrogen during the hydrogen transportation and distribution process, and avoid safety hazards during the hydrogen transportation, it is necessary to test whether the pressure reducing valve meets the hydrogen transportation and distribution requirements.

[0037] At present, the test of the pressure regulating valve mainly uses a hydrogen cylinder or a bottle group gas source, and the continuous gas supply capacity is weak. The test equipment cannot provide a stable pressure environment for a long time, and the working state of the tested valve receiving continuous and stable pressure is prone to great misjudgment. At the same time, the conventional test device can usually only test megapascal pressure regulating valves, and cannot determine whether the civilian kilopascal low-pressure pressure regulating valve meets the hydrogen transportation and distribution use requirements, which seriously restricts the target audience of hydrogen use.

[0038] Therefore, an embodiment of the present application provides a pressure regulating valve test device.

[0039] Referring to Figure 1 A pressure regulating valve test device comprises:

[0040] A gas pipeline comprises a main path a, a first branch path b, a second branch path c, and a third branch path d.

[0041] The main path a is connected to a gas source, and a first regulating valve 03 is arranged on the main path a. The input end of the first branch path b and the input end of the second branch path c are connected to the output end of the main path a. A first test site 21 and a second regulating valve 06 are arranged on the first branch path b in sequence along the gas inlet direction, and a first to-be-tested valve or a straight-through pipe is installed at the first test site 21. A second test site 22 and a third regulating valve 09 are arranged on the second branch path c in sequence along the gas inlet direction, and a second to-be-tested valve is installed at the second test site 22. The input end of the third branch path d is connected to the gas outlet end of the second regulating valve 06, and the output end of the third branch path d is connected to the gas inlet end of the second test site 22.

[0042] A monitoring assembly is arranged on the first branch path b and the second branch path c, and is used to acquire the temperature and pressure of the gas inlet end and the gas outlet end of the first test site 21 and the gas inlet end and the gas outlet end of the second test site 22.

[0043] A pipeline switching valve group is arranged on the gas pipeline, and is used to control the on-off state of the first branch path b, the second branch path c, and the third branch path d, so that the gas in the main path a is transported along the first branch path b or / and the second branch path c, or is transported along the first branch path b, the third branch path d, and the second branch path c in sequence.

[0044] Specifically, referring to Figure 1 , the gas supply pipeline includes a main pipeline a, a first branch pipeline b, a second branch pipeline c and a third branch pipeline d, the main pipeline a is connected with a gas source, the medium of the gas source is hydrogen, and then the hydrogen can be delivered to the three branch pipelines through the main pipeline a, and a first regulating valve 03 is arranged on the main pipeline a.

[0045] The first branch pipeline b and the second branch pipeline c are connected in parallel, the input end of the first branch pipeline b and the input end of the second branch pipeline c are connected with the output end of the main pipeline a at the same time, and the output end of the first branch pipeline b and the output end of the second branch pipeline c are connected to the output pipeline at the same time. A first test site 21 and a second regulating valve 06 are arranged on the first branch pipeline b in sequence along the gas inlet direction, a second test site 22 and a third regulating valve 09 are arranged on the second branch pipeline c in sequence along the gas inlet direction, and the third branch pipeline d is connected between the first branch pipeline b and the second branch pipeline c, the input end of the third branch pipeline d is connected with the gas outlet end of the second regulating valve 06, and the output end of the third branch pipeline d is connected with the gas inlet end of the second test site 22.

[0046] In this embodiment, the first regulating valve 03, the second regulating valve 06 and the third regulating valve 09 are all electric regulating valves, which can adjust the pressure and flow of the fluid. Specifically, the first regulating valve 03 is mainly used for adjusting the pressure of the high-pressure gas source, so that the downstream pressure is reduced to the required pressure of the valve to be tested; the second regulating valve 06 can realize the flow control function of the upstream test site (i.e. the first test site 21), and can also realize the pressure control function of the downstream test site (i.e. the second test site 22); the third regulating valve 09 is mainly used for flow control of the second test site 22.

[0047] The first test site 21 and the second test site 22 can both be installed with the valve to be tested, in this embodiment, in order to facilitate the distinction, according to the different installation positions of the valve to be tested, the valve to be tested installed at the first test site is defined as the first valve to be tested, and the valve to be tested installed at the second test site 22 is defined as the second valve to be tested.

[0048] The monitoring assembly is arranged on the first branch pipeline b and the second branch pipeline c, which can obtain the temperature and pressure of the gas inlet end and the gas outlet end of the first test site 21 and the gas inlet end and the gas outlet end of the second test site 22, and finally the comprehensive flow capacity, pressure stability precision, response time and other performance parameters of the first valve to be tested and the second valve to be tested can be obtained according to the obtained temperature and pressure information of the corresponding positions.

[0049] The pipeline switching valve group can control the on-off state of the first branch pipeline b, the second branch pipeline c and the third branch pipeline d respectively, so that the gas can be delivered along different paths in order to adapt to the test requirements of different devices to be tested.

[0050] Specifically, referring to Figure 2When the high-pressure regulating valve is tested, the first test site 21 and the second test site 22 can be respectively installed with the first valve to be tested and the second valve to be tested of different calibers, and the pipeline switching valve group controls the gas in the main pipeline a to be transported along the first branch pipeline b and the second branch pipeline c. At this time, the first regulating valve 03 performs primary pressure regulation on the high-pressure gas source, the second regulating valve 06 cooperates to regulate the flow of the first test site 21, and the third regulating valve 09 cooperates to regulate the flow of the second test site 22, so as to provide a stable pressure and flow high-pressure environment for the first valve to be tested and the second valve to be tested, and realize the simultaneous testing of different calibers of the tested equipment. It can be understood that in actual application, one of the first branch pipeline b or the second branch pipeline c can be selected to be opened according to the needs, so that the gas in the main pipeline a is transported along only the first branch pipeline b or only the second branch pipeline c, so as to perform the testing of a single valve to be tested.

[0051] Referring to Figure 3 When the low-pressure regulating valve is tested, a bypass pipe is installed at the first test site 21, and the second valve to be tested is installed at the second test site 22. The pipeline switching valve group controls the gas in the main pipeline a to be transported along the first branch pipeline b, the third branch pipeline d and the second branch pipeline c in turn. At this time, the first regulating valve 03 performs primary pressure regulation, the second regulating valve 06 performs secondary pressure regulation, and the third regulating valve 09 cooperates to regulate the flow of the second test site 22, so as to provide a stable pressure and flow low-pressure environment for the second valve to be tested, and realize the testing of the kilopascal low-pressure regulating valve.

[0052] Through the above setting, under the setting of the first regulating valve 03, the second regulating valve 06 and the third regulating valve 09, the flow control and pressure control functions can be realized, so as to provide a precise pressure and flow testing environment for the valve to be tested, which is not limited by the working condition of the gas source, and ensures the accuracy of the test results. The pipeline switching valve group can switch the gas transportation path, so as to realize primary pressure regulation or multi-stage pressure regulation, and can simultaneously test different calibers of the valve to be tested, reduce the cost waste caused by the separate testing of fixed valves and the customization of testing devices, and can also test different pressure grades of the valve to be tested, and solve the problem that the conventional testing device cannot test the kilopascal low-pressure regulating valve.

[0053] Optionally, the pipeline switching valve group comprises: a first inlet valve 05 and a first outlet valve 07, which are respectively arranged at the input end and the output end of the first branch pipeline b; a second inlet valve 08 and a second outlet valve 10, which are respectively arranged at the input end and the output end of the second branch pipeline c; and a third valve 11 arranged on the third branch pipeline d. The input end of the third branch pipeline d is located between the second regulating valve 06 and the first outlet valve 07, and the output end of the third branch pipeline d is located between the second inlet valve 08 and the second test site 22.

[0054] Specifically, when the first inlet valve 05 and the first outlet valve 07 are opened, and the second inlet valve 08 and the second outlet valve 10 and the third valve 11 are closed, the gas in the main path a is only transported along the first branch path b, at this time, the first to-be-tested valve can be tested in a high-pressure environment;

[0055] When the second inlet valve 08 and the second outlet valve 10 are opened, and the first inlet valve 05 and the first outlet valve 07 and the third valve 11 are closed, the gas in the main path a is only transported along the second branch path c, at this time, the second to-be-tested valve can be tested in a high-pressure environment;

[0056] When the first inlet valve 05 and the first outlet valve 07 and the second inlet valve 08 and the second outlet valve 10 are opened, and the third valve 11 is closed, the gas in the main path a can be transported along the first branch path b and the second branch path c respectively, at this time, the first to-be-tested valve and the second to-be-tested valve with different diameters can be tested in a high-pressure environment at the same time;

[0057] When the first inlet valve 05 and the second outlet valve 10 and the third valve 11 are opened, and the first outlet valve 07 and the second inlet valve 08 are closed, the gas in the main path a is transported along the first branch path b, the third branch path d, and the second branch path c in turn, at this time, the second to-be-tested valve can be tested in a medium-low pressure environment.

[0058] Optionally, the monitoring assembly comprises a temperature assembly and a pressure assembly;

[0059] The temperature assembly is configured to acquire temperatures of the gas inlet end and the gas outlet end of the first test site 21 and the gas inlet end and the gas outlet end of the second test site 22, and the pressure assembly is configured to acquire pressures of the gas inlet end and the gas outlet end of the first test site 21 and the gas inlet end and the gas outlet end of the second test site 22.

[0060] The pressure regulating valve testing device further comprises a station control system connected with the temperature assembly and the pressure assembly respectively, and configured to receive and store temperature and pressure information of corresponding positions.

[0061] Further, the temperature assembly comprises a first temperature transmitter T1 and a second temperature transmitter T2 arranged at the gas inlet end and the gas outlet end of the first test site 21 respectively, and a third temperature transmitter T3 and a fourth temperature transmitter T4 arranged at the gas inlet end and the gas outlet end of the second test site 22 respectively.

[0062] The pressure assembly comprises a first pressure transmitter P4 and a second pressure transmitter P5 arranged at the gas inlet end and the gas outlet end of the first test site 21 respectively, and a third pressure transmitter P7 and a fourth pressure transmitter P8 arranged at the gas inlet end and the gas outlet end of the second test site 22 respectively.

[0063] Specifically, in this embodiment, the temperature component uses a temperature transmitter, and the pressure component uses a pressure transmitter, such as... Figure 1 As shown, a first temperature transmitter T1 and a first pressure transmitter P4 are installed at the air inlet of the first test position 21, which can acquire the gas temperature and pressure at the air inlet of the first test position 21 in real time and send them to the station control system; a second temperature transmitter T2 and a second pressure transmitter P5 are installed at the air outlet of the first test position 21, which can acquire the gas temperature and pressure at the air outlet of the first test position 21 in real time and send them to the station control system; the station control system can store the received temperature and pressure information, and based on the above information, it can finally obtain the comprehensive flow capacity, pressure stabilization accuracy, control accuracy, response time, closing accuracy and other performance parameters of the first valve under test.

[0064] Similarly, a third temperature transmitter T3 and a third pressure transmitter P7 are installed at the inlet end of the second test position 22, which can acquire the gas temperature and pressure at the inlet end of the second test position 22 in real time and send them to the station control system. A fourth temperature transmitter T4 and a fourth pressure transmitter P8 are installed at the outlet end of the second test position 22, which can acquire the gas temperature and pressure at the outlet end of the second test position 22 in real time and send them to the station control system, and finally obtain the performance parameters of the second valve under test.

[0065] Furthermore, the station control system is connected to the first regulating valve 03, the second regulating valve 06, and the third regulating valve 09 respectively, so that the station control system can control the opening degree of the above regulating valves as needed.

[0066] In this embodiment, the pressure transmitter has an accuracy of ±0.04% and a long-term stability of ±0.2% URL (Upper Range Limit) over 10 years. At the same time, the pressure transmitter has good temperature characteristics, and the zero point and range are less affected by changes in ambient temperature. Using a high-precision pressure transmitter can make the downstream pressure control of the electric regulating valve more accurate, which helps to reduce valve oscillation and ensures more stable final valve opening control.

[0067] The temperature transmitter is an integrated unit, using a vibration-resistant four-wire Pt100 resistance temperature detector (RTD) sensor. The transmitter's accuracy is ±0.1℃. It exhibits long-term stability; the zero point and range are unaffected by the installation location. The transmitter's stability is ±0.25% URL over 5 years, with environmental temperature influence less than 0.0015℃ / 1.0℃. Vibration has no impact on the transmitter's measurement.

[0068] Compared with the way of using the in-situ gauge pressure gauge and thermometer in the conventional testing device, the temperature transmitter and pressure transmitter adopted in the embodiment of the application have higher precision, stability and reliability, and can acquire the medium state data before and after the working of the tested valve in real time, realize data remote transmission, participate in process control, and facilitate the analysis of the performance index of the tested valve according to the data.

[0069] Optionally, a safety valve 13 is arranged on the main path a, and the safety valve 13 is located at the gas outlet end of the first regulating valve 03.

[0070] Specifically, the safety valve 13 is arranged at the gas outlet end of the first regulating valve 03, and when an emergency failure occurs, for example, the first regulating valve 03 fails to cause the pressure of the pipeline downstream of the first regulating valve 03 to abnormally rise and be higher than the set value of the safety valve 13, the safety valve 13 works, and the gas in the pipeline can be safely diffused through the safety valve, the control valve 12 and the safety valve 13, so as to ensure that the pressure of the downstream pipeline is lower than the design pressure of the downstream equipment and ensure the safety of the downstream equipment.

[0071] Further, a safety cut-off valve 02 and a pressure feedback pipeline e are further arranged on the main path a; the safety cut-off valve 02 is located at the gas inlet end of the first regulating valve 03, one end of the pressure feedback pipeline e is connected to the safety cut-off valve 02, and the other end of the pressure feedback pipeline e is connected to the gas outlet end of the first regulating valve 03; the safety cut-off valve 02 is used to acquire the pressure at the gas outlet end of the first regulating valve 03, and perform a closing action according to the pressure at the gas outlet end of the first regulating valve 03 being greater than the preset pressure of the safety cut-off valve 02.

[0072] Specifically, to further ensure that the pressure of the testing device is within a safe range, the safety cut-off valve 02 and the pressure feedback pipeline e are further arranged on the main path a; the safety cut-off valve 02 is arranged at the gas inlet end of the first regulating valve 03, one end of the pressure feedback pipeline e is connected to the safety cut-off valve 02, and the other end of the pressure feedback pipeline e is connected to the gas outlet end of the first regulating valve 03. Since the pressure feedback pipeline e is communicated with the pipeline downstream of the first regulating valve 03, the safety cut-off valve 02 can acquire the pressure of the pipeline downstream of the first regulating valve 03 through the pressure feedback pipeline e. When the pressure of the pipeline downstream of the first regulating valve 03 cannot be reduced through safe diffusion, and the downstream pressure is greater than the preset pressure value of the safety cut-off valve 02, the safety cut-off valve 02 performs a closing action to cut off the gas path and prevent the gas source medium from continuing to be transported along the main path a. After the failure is eliminated, the safety cut-off valve 02 can be reset to restore the operation of the testing device.

[0073] Optionally, a first gas source inlet A and a second gas source inlet B are arranged on the gas pipeline; the first gas source inlet A is arranged at the input end of the main path a, and the second gas source inlet B is arranged at the input end of the first branch path b or the second branch path c.

[0074] Specifically, in the embodiment, two different gas source access ports are arranged on the gas pipeline, which are a first gas source access port A and a second gas source access port B. The first gas source access port A is arranged on the main path a and located at the input end of the main path a. The second gas source access port B is located at the output end of the main path a and arranged at the input end of the first branch b or the second branch c. The first gas source access port A can be used to access the hydrogen cylinder or cylinder group gas source. Through the pressure and flow control functions of the first adjusting valve 03, the second adjusting valve 06 and the third adjusting valve 09, a stable and continuous test environment can be provided for the valve to be tested. The second gas source access port B can be used to access the hydrogen pipeline gas source. The pressure of the hydrogen pipeline gas source is relatively more stable. After being accessed to the test device, the pressure and flow of the second adjusting valve 06 and the third adjusting valve 09 can be adjusted to provide a precise test environment for the valve to be tested.

[0075] Specifically, when the second gas source access port B accesses the hydrogen pipeline gas source, the gas directly enters the front end of the first inlet valve 05 and the second inlet valve 08. When the gas is conveyed along the first branch b and / or the second branch c, the second adjusting valve 06 and the third adjusting valve 09 are used to adjust the flow of the first test site 21 and the second test site 22, respectively. At this time, the first valve to be tested or / and the second valve to be tested under high pressure environment is tested. When the gas is conveyed along the first branch b, the third branch d and the second branch c in turn, the second adjusting valve 06 is used to adjust the pressure of the second test site 22, and the third adjusting valve 09 is used to adjust the flow of the second test site 22. At this time, the second valve to be tested under medium and low pressure environment is tested.

[0076] In actual application, different gas sources can be selected according to different working conditions of the gas source to access hydrogen for testing.

[0077] Compared with the single gas source access of the conventional test device, the test device provided in the embodiment can meet the gas source access demand of various working conditions, stably and continuously provide a hydrogen source test environment with various pressure and flow conditions for the valve to be tested, so as to more accurately judge the running state and performance index of the valve to be tested.

[0078] Optionally, the input end of the main path a is provided with a fourth inlet valve 01, the output end of the main path a is provided with a fourth outlet valve 04, and the second gas source access port B is located at the gas outlet end of the fourth outlet valve 04.

[0079] In order to further facilitate the control of the on-off state of the main path a, a fourth inlet valve 01 and a fourth outlet valve 04 are arranged at the input end and the output end of the main path a respectively, and the fourth outlet valve 04 is located upstream of the second gas source inlet B. When the hydrogen gas source is connected from the first gas source inlet A, the fourth inlet valve 01 and the fourth outlet valve 04 are both opened, and the gas in the main path a after pressure reduction by the first regulating valve 03 can enter the first branch path b or / and the second branch path c through the fourth outlet valve 04; when the hydrogen gas source is connected from the second gas source inlet B, the fourth inlet valve 01 and the fourth outlet valve 04 are closed to avoid the gas entering the main path a, so that the gas can directly enter the first branch path b or / and the second branch path c.

[0080] Optionally, a first pressure gauge P1 and a second pressure gauge P3 are arranged at the gas inlet end and the gas outlet end of the first regulating valve 03 respectively. By arranging the first pressure gauge P1 and the second pressure gauge P3, the medium pressure before and after the first regulating valve 03 can be detected and the pressure reading can be displayed, which is convenient for the staff to directly observe in order to judge the working state of the first regulating valve 03. Similarly, a third pressure gauge P6 and a fourth pressure gauge P9 can also be arranged at the gas outlet end of the first test site 21 and the second test site 22 respectively.

[0081] Further, a fifth pressure transmitter P2 can also be arranged at the gas outlet end of the first regulating valve 03, the fifth pressure transmitter P2 is connected with the station control system, and is used for acquiring the medium pressure after the first regulating valve 03 and transmitting the pressure information to the station control system, so that the station control system can control the opening degree of the first regulating valve 03 according to the pressure information, and more accurate control can be realized.

[0082] Optionally, a maintenance valve group is arranged on the main path a, the first branch path b and the second branch path c. Specifically, in the embodiment, a first maintenance valve group 14 is arranged at the gas outlet end of the first regulating valve 03 on the main path a, a second maintenance valve group 15 is arranged at the gas outlet end of the first test site 21 on the first branch path b, and a third maintenance valve group 16 is arranged at the gas outlet end of the second test site 22 on the second branch path c. Each maintenance valve group can include a manual ball valve for maintenance and venting and a needle valve or a stop valve for maintenance and venting, which is convenient for venting the gas in the pipeline during maintenance of the gas pipeline.

[0083] Optionally, a gas recovery device is connected to the output end of the first branch path b and the output end of the second branch path c. By arranging the gas recovery device, the gas discharged after the test can be recovered, so as to avoid waste of resources and be more economical and environmentally friendly.

[0084] The process of testing the high-pressure pressure regulating valve by using the pressure regulating valve test device provided in the embodiment of the application is as follows (the test process principles at the first test site 21 and the second test site 22 are the same, and only the first test site 21 is taken as an example for description below) :

[0085] The main road a accesses the gas source medium, opens the fourth inlet valve 01 and the fourth outlet valve 04, the first regulating valve 03 reduces the pressure of the high-pressure gas source medium, and the reduced gas is transported to the front end of the first inlet valve 05 along the main road a;

[0086] The first to-be-tested valve is installed at the first test site 21, the first inlet valve 05 and the first outlet valve 07 are opened, the gas source medium is introduced into the front end of the first to-be-tested valve and transported along the first branch road b; the first to-be-tested valve is controlled to have an opening degree of 10%, the opening degree of the second regulating valve 06 is controlled by the station control system, the medium flow is regulated by changing the opening degree of the second regulating valve 06, at the same time, the first temperature transmitter T1 and the first pressure transmitter P4 acquire the medium temperature and pressure at the front end of the first to-be-tested valve respectively, the second temperature transmitter T2 and the second pressure transmitter P5 acquire the medium temperature and pressure at the rear end of the first to-be-tested valve respectively, and transmit to the station control system for temporary storage, when the medium pressure at the front and rear ends of the first to-be-tested valve reaches the differential pressure value required by the related standard, the station control system records the current working condition parameters, that is, the medium temperature, pressure, flow and the like;

[0087] The opening degree of the first to-be-tested valve is changed to 20%, the above step is repeated, and the working condition parameters of the first to-be-tested valve at the opening degree of 20% are recorded by the station control system; the test is repeated until the opening degree of the first to-be-tested valve reaches 100%.

[0088] After the test is completed, the second regulating valve 06 is fully opened, and the test medium is discharged into the gas recovery device through the general first outlet valve 07.

[0089] The working condition parameters of the first to-be-tested valve at each opening degree from 0% to 100% are recorded by the station control system and exported for system calculation and analysis, and finally the comprehensive flow capacity of the first to-be-tested valve can be obtained, and the steady pressure precision, control precision, response time, closing precision and other performance parameters can also be obtained.

[0090] The process of testing the medium-low pressure pressure regulating valve by using the pressure regulating valve test device provided in the application embodiment is as follows:

[0091] The main road a accesses the gas source medium, opens the fourth inlet valve 01 and the fourth outlet valve 04, the first regulating valve 03 reduces the pressure of the high-pressure gas source medium, and the reduced gas is transported to the front end of the first inlet valve 05 along the main road a;

[0092] Install the straight-through pipe at the first test site 21, install the second to-be-tested valve at the second test site 22, open the first inlet valve 05, the third valve 11 and the second outlet valve 10, close the first outlet valve 07 and the second inlet valve 08, so that the gas source medium is introduced into the front end of the straight-through pipe, first into the first branch b, and the gas after the pressure reduction by the second regulating valve 06 continues to be reduced, and the gas after the pressure reduction reaches the front end of the second to-be-tested valve along the third branch d, and continues to be transported along the second branch c; control the second to-be-tested valve to have an opening degree of 10%, control the opening degree of the third regulating valve 09 through the station control system, realize the regulation and control of the medium flow through the change of the opening degree of the third regulating valve 09, at the same time, the third temperature transmitter T3 and the third pressure transmitter P7 acquire the medium temperature and pressure at the front end of the second to-be-tested valve respectively, the fourth temperature transmitter T4 and the fourth pressure transmitter P8 acquire the medium temperature and pressure at the rear end of the second to-be-tested valve respectively, and transmit to the station control system for temporary storage, when the medium pressure difference between the front and rear ends of the second to-be-tested valve reaches the pressure difference value required by the relevant standard, the station control system records the current working condition parameters in the background;

[0093] Change the opening degree of the second to-be-tested valve to 20%, repeat the above step, and record the working condition parameters of the second to-be-tested valve at an opening degree of 20% through the background of the station control system; repeat the test until the opening degree of the second to-be-tested valve reaches 100%;

[0094] After the test is completed, open the third regulating valve 09, and discharge the test medium into the gas recovery device through the second outlet valve 10;

[0095] Record the working condition parameters of the second to-be-tested valve at each opening degree of 0%-100% through the background of the station control system, and finally the comprehensive flow capacity of the second to-be-tested valve can be obtained, and the performance parameters such as pressure stabilization accuracy, control accuracy, response time and closing accuracy can also be obtained.

[0096] The pressure regulating valve test device provided by the embodiment of the application can continuously and stably provide a pure hydrogen test environment with accurate pressure and flow for the to-be-tested pressure regulating valve, on the one hand, different caliber pressure regulating valves can be tested at the same time, the work efficiency is improved, and the cost waste caused by separate testing of fixed valves and customization of test devices is avoided, on the other hand, a plurality of pressure regulating valves with different pressure grades can be tested, the problem of lack of kilopascal low-pressure pressure regulating valve test devices in the prior art is solved, the test pressure can be remotely controlled, the medium parameter information before and after the test valve site can be extracted in real time, the running state and performance indicators of the measured valve are more accurately judged, and it is of great significance for promoting the development and application of hydrogen pressure reducing valves.

[0097] It should be noted that each of the embodiments in the specification adopts a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between embodiments can be referred to each other.

[0098] It should also be noted that in this paper, the "front end" and "rear end" of the valve respectively refer to the air inlet end and the air outlet end of the valve. The upstream refers to the end relatively close to the gas source in the gas flow direction, and the downstream refers to the end relatively far away from the gas source in the gas flow direction. In addition, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations, nor can it be understood as indicating or implying relative importance. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or terminal device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or terminal device including the element.

[0099] The above describes the technical solutions provided by the present application in detail. The principles and implementation modes of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the present application, and the content of the specification should not be understood as limiting the present application. Meanwhile, for those skilled in the art, according to the present application, there will be different forms of changes in specific implementation modes and application ranges, which do not need and cannot be exhausted here, and the obvious changes or changes derived therefrom are still within the protection scope of the present application.

Claims

1. A pressure regulating valve testing device, characterized in that, include: The gas pipeline includes the main pipeline, the first branch pipeline, the second branch pipeline, and the third branch pipeline; The main line is connected to a gas source, and a first regulating valve is installed on the main line. The input ends of the first branch and the second branch are simultaneously connected to the output end of the main line. A first test position and a second regulating valve are sequentially arranged along the air intake direction on the first branch, and a first valve to be tested or a straight pipe is installed at the first test position. A second test position and a third regulating valve are sequentially arranged along the air intake direction on the second branch, and a second valve to be tested is installed at the second test position. The input end of the third branch is connected to the air outlet of the second regulating valve, and the output end of the third branch is connected to the air intake end of the second test position. A monitoring component is installed on the first branch and the second branch to acquire the temperature and pressure at the air inlet and outlet of the first test position and the air inlet and outlet of the second test position. A pipeline switching valve assembly is installed on the gas transmission pipeline to control the on / off state of the first branch, the second branch, and the third branch, so that the gas in the main pipeline is transported along the first branch and / or the second branch, or sequentially along the first branch, the third branch, and the second branch.

2. The pressure regulating valve testing device according to claim 1, characterized in that: The pipeline switching valve group includes: a first inlet valve and a first outlet valve, respectively located at the input end and output end of the first branch; a second inlet valve and a second outlet valve, respectively located at the input end and output end of the second branch; and a third valve located on the third branch. The input end of the third branch is located between the second regulating valve and the first outlet valve, and the output end of the third branch is located between the second inlet valve and the second test position.

3. The pressure regulating valve testing device according to claim 1, characterized in that: The monitoring components include a temperature component and a pressure component; The temperature component is used to acquire the temperature of the air inlet and outlet of the first test position and the air inlet and outlet of the second test position; the pressure component is used to acquire the pressure of the air inlet and outlet of the first test position and the air inlet and outlet of the second test position. The pressure regulating valve testing device also includes a station control system, which is connected to the temperature component and the pressure component respectively, and is used to receive and store temperature and pressure information at the corresponding locations.

4. The pressure regulating valve testing device according to claim 3, characterized in that: The temperature assembly includes: a first temperature transmitter and a second temperature transmitter, respectively disposed at the air inlet and air outlet of the first test position; a third temperature transmitter and a fourth temperature transmitter, respectively disposed at the air inlet and air outlet of the second test position. The pressure assembly includes: a first pressure transmitter and a second pressure transmitter, respectively disposed at the air inlet and air outlet of the first test position; a third pressure transmitter and a fourth pressure transmitter, respectively disposed at the air inlet and air outlet of the second test position.

5. The pressure regulating valve testing device according to claim 1, characterized in that: A safety valve is installed on the main road, and the safety valve is located at the outlet end of the first regulating valve.

6. The pressure regulating valve testing device according to claim 5, characterized in that: A safety shut-off valve and a pressure feedback pipeline are also installed on the main line; the safety shut-off valve is located at the air inlet of the first regulating valve, one end of the pressure feedback pipeline is connected to the safety shut-off valve, and the other end of the pressure feedback pipeline is connected to the air outlet of the first regulating valve. The safety shut-off valve is used to obtain the pressure at the outlet of the first regulating valve and to perform a shut-off action when the pressure at the outlet of the first regulating valve is greater than the preset pressure of the safety shut-off valve.

7. The pressure regulating valve testing device according to claim 1, characterized in that: The gas pipeline is equipped with a first gas source inlet and a second gas source inlet. The first gas source inlet is located at the input end of the main road, and the second gas source inlet is located at the input end of the first branch road or the second branch road.

8. The pressure regulating valve testing device according to claim 7, characterized in that: The main pipeline is equipped with a fourth inlet valve at its input end and a fourth outlet valve at its output end, with the second gas source inlet located at the outlet end of the fourth outlet valve.

9. The pressure regulating valve testing device according to claim 1, characterized in that: A first pressure gauge and a second pressure gauge are respectively installed at the air inlet and air outlet of the first regulating valve.

10. The pressure regulating valve testing device according to claim 1, characterized in that: Gas recovery devices are connected to the output ends of the first branch and the second branch.

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