Multi-purpose hydrogen adding machine metering and calibrating device

Abstract

The invention discloses a multi-purpose hydrogen adding machine metering and calibrating device, and aims to solve the technical problems that an existing metering and calibrating device is greatly influenced by a calibrating and testing environment, and a calibrating error cannot be found in time. The gas inlet penetrates through the shell and is used for being correspondingly communicated with a hydrogenation gun of a hydrogenation machine to be measured, the pressure transmitter and the mass flow meter are sequentially connected to the downstream of the gas inlet in series through corresponding pipelines, and a flow metering branch and a weighing metering branch are arranged on the downstream of the mass flow meter in parallel; the device further comprises a power supply module, an upper computer, a camera terminal, a wireless communication module used for communicating with the upper computer, and a diffusion recovery pipeline which is correspondingly conducted between the diffusion header pipe and the weighing bottle. The diffusion recovery pipeline comprises a diffusion recovery valve and a fuel cell pack which are sequentially connected in series from upstream to downstream; and the fuel cell pack is correspondingly and electrically connected with the power supply module. The metering and calibrating device has the advantages of various calibrating modes, excellent environmental adaptability, high metering precision, high reliability and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogenation machine metering, and in particular to a multi-purpose hydrogenation machine metering and calibration device. Background Art

[0002] Hydrogen is a clean and efficient energy source that can be produced from hydrogen-containing mixtures such as water and fossil fuels. It is an important industrial raw material and energy carrier. Its combustion product is water, which does not produce any pollution. Therefore, it is also regarded as an ideal substitute for traditional fossil energy. Hydrogen energy is the energy released by hydrogen during physical and chemical changes. It can be used for energy storage, power generation, and fuel for various vehicles.

[0003] Hydrogen refueling machines are used to provide compressed hydrogen fuel filling services for hydrogen fuel vehicles. They are special equipment with metering and pricing functions. They are generally composed of hydrogen flow meters, detection alarm devices, filters, solenoid valves, safety valves, hydrogenation guns, hydrogenation hoses, electronic controllers, auxiliary devices, etc. As an important metering instrument and basis for hydrogen trade settlement, the long-term stability, safety and metering accuracy of hydrogen refueling machines are very important.

[0004] One method of measuring and verifying a hydrogenation machine known to the inventor is to use a high-precision electronic balance to measure, and to compare the difference between the filling value measured by the hydrogenation machine display and the weighing value of the high-precision electronic balance, and then judge the measurement accuracy of the hydrogenation machine. However, in the process of implementing the technical solution in the embodiment of the present application, the inventor of the present application found that the above technology has at least the following technical problems: the high-precision electronic balance is easily affected by the surrounding wind and vibration, and is easily restricted by the verification environment, resulting in an error between the measured value and the actual weighing value, and the error cannot be discovered in time, resulting in the failure of measurement verification.

[0005] The information disclosed in this background technology section is only used to deepen the understanding of the background technology of the present disclosure, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art. Summary of the invention

[0006] In view of at least one of the above technical problems, the present disclosure provides a multi-purpose hydrogenation machine metering and calibration device, aiming to solve the technical problems that the existing metering and calibration devices are greatly affected by the calibration test environment and cannot detect calibration errors in time.

[0007] According to one aspect of the present disclosure, a multi-purpose hydrogenation machine metering and calibration device is provided, comprising a shell, an air inlet penetrating the shell for correspondingly communicating with the hydrogenation gun of the hydrogenation machine to be tested, a pressure transmitter and a mass flow meter located in the shell and connected in series to the downstream of the air inlet through corresponding pipelines, wherein a flow metering branch and a weighing metering branch are provided in parallel downstream of the mass flow meter; the flow metering branch comprises a first stop valve connected in series from upstream to downstream and a gas inlet for correspondingly communicating with a vehicle to be refueled; the weighing metering branch comprises a second stop valve connected in series from upstream to downstream and a weighing device with a weighing bottle fixed relatively thereto; the device also comprises a power module, a host computer, a camera terminal connected to the host computer for correspondingly monitoring the metering value of the hydrogenation machine, a wireless communication module for communicating with the host computer, and a release recovery pipeline correspondingly connected between the release main pipe and the weighing bottle; the release recovery pipeline comprises a release recovery valve connected in series from upstream to downstream and a fuel cell group electrically connected to the power module.

[0008] This device can select the mass flow meter with relatively high metering efficiency and the mass flow meter and weighing device with both metering efficiency and accuracy by correspondingly controlling the first stop valve or the second stop valve. The metering method can be selected according to the actual metering test environment; in addition, the use of mass flow meter and weighing device for simultaneous metering can form a redundant metering method, and the metering error can be found in time by comparing the metering difference between the mass flow meter and the weighing device. In addition, the hydrogen used for metering test can be recovered through the fuel cell group, which saves metering costs and improves the reuse efficiency, solving the power consumption problem of the device under the restricted environment of the hydrogen refueling station.

[0009] In some embodiments of the present disclosure, a plurality of running wheels with brakes are provided at the bottom of the housing, so that the metrology and verification device can be flexibly moved by the running wheels, thereby facilitating adaptation to the testing site and achieving the purpose of improving the testing efficiency and convenience.

[0010] In some embodiments of the present disclosure, the multi-purpose hydrogenation machine metering and calibration device further includes a temperature transmitter correspondingly arranged in the pipeline between the air inlet and the mass flow meter. By setting the temperature transmitter, the temperature of the hydrogen flowing inside the pipeline of the metering and calibration device can be monitored in time to avoid the adverse effect of excessively high hydrogen temperature on the metering accuracy.

[0011] In some embodiments of the present disclosure, the multi-purpose hydrogenation machine metering and calibration device also includes an infrared communication module for correspondingly communicating with the hydrogenation machine to be tested, the vehicle to be refueled, and / or the weighing bottle. While verifying whether the hydrogenation machine has an infrared communication function, the temperature and pressure changes in the vehicle to be refueled and the weighing bottle before, after, and during refueling can be obtained conveniently and quickly, as well as the refueling rate, to ensure that each parameter is within a safe range, thereby ensuring the safety and reliability of the metering test.

[0012] In some embodiments of the present disclosure, infrared transceiver terminals are respectively provided at the hydrogenation gun corresponding to the hydrogenation machine to be tested, the gas filling port, the fuel bottle of the filling vehicle and / or the weighing bottle, to ensure reliable and effective information transmission of hydrogen parameters and filling and refueling rates in the gas cylinder.

[0013] In some embodiments of the present disclosure, the multi-purpose hydrogenation machine metering and calibration device further includes an explosion-proof junction box, through which the pressure transmitter, mass flow meter, weighing device, and wireless communication module are respectively electrically connected to the power module. Thus, the explosion-proof junction box is used to avoid safety hazards such as electric sparks in electrical wiring.

[0014] In some embodiments of the present disclosure, the multi-purpose hydrogenation machine metering and calibration device further includes a purge pipeline connected to a nitrogen source and provided with a purge valve in the pipeline, and the purge pipeline is connected to the corresponding pipeline position between the air inlet and the pressure transmitter. The purge pipeline is used to purge the calibration device pipeline before and after the metering and calibration to ensure metering and detection accuracy and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a partial structural exploded diagram of a multi-purpose hydrogenation machine metering and calibration device in one embodiment of the present application.

[0016] Figure 2 This is a schematic diagram of the metering principle of a multi-purpose hydrogenation machine metering and calibration device in one embodiment of the present application.

[0017] In the above figures, 10 is a shell, 11 is a running wheel, 20 is a hydrogenator to be tested, 21 is an air inlet, 22 is a pressure transmitter, 23 is a mass flow meter, 24 is a temperature transmitter, 3 is a flow metering branch, 31 is a first stop valve, 32 is a gas filling port, 33 is a fuel vehicle to be filled, 4 is a weighing metering branch, 41 is a second stop valve, 42 is a weighing device, 43 is a weighing bottle, 5 is a venting recovery pipeline, 51 is a venting recovery valve, 52 is a fuel cell stack, 6 is a power module, 61 is an explosion-proof junction box, 71 is a host computer, 72 is a camera terminal, 8 is an infrared communication module, and 9 is a purge pipeline. DETAILED DESCRIPTION

[0018] The terms "first", "second", etc. mentioned in this application are used to distinguish the objects described and do not have any order or technical meaning. The terms "connection" and "connection" mentioned in this application include direct and indirect connections (connections) unless otherwise specified.

[0019] The programs involved or relied upon in the following embodiments are all conventional programs or simple programs in the technical field, and those skilled in the art can make conventional selections or adaptive adjustments according to specific application scenarios.

[0020] Unless otherwise specified, the sensors and other devices involved in the following embodiments are all conventional commercially available products.

[0021] In order to better understand the technical solution of the present application, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] The prior art uses a weighing device to measure and calibrate the hydrogenation machine. This calibration method is easily affected by the surrounding test environment, such as wind, vibration, etc., which will cause a certain degree of measurement error. However, this error is difficult to detect in time, resulting in unreliable measurement and poor credibility. To this end, this example discloses a multi-purpose hydrogenation machine measurement and calibration device, which can select the corresponding measurement test method according to the actual test environment and test requirements, and has high flexibility and reliability.

[0023] Specifically, the hydrogenation machine metering and verification device includes a housing 10, see Figure 1 The housing 10 is used to protect the internal structure of the metrology verification device and prevent it from being polluted by the environment such as dust. A plurality of running wheels 11 with brakes are provided at the bottom of the housing 10. Thus, the device can be conveniently moved through the running wheels 11, so that it can be moved to a corresponding appropriate position according to the detection needs, thereby helping to improve the detection efficiency.

[0024] See also Figure 2 The housing 10 is provided with an air inlet 21 for conducting with the hydrogenation gun of the hydrogenation machine 20 to be tested. In this embodiment, the air inlet 21 is provided with a total of several air inlet ports of different structural types, and each air inlet port is connected in parallel, thereby adapting to hydrogenation guns of different structural types to improve the wide applicability and compatibility of the metering and verification device. The air inlet 21 is used to obtain the test hydrogen measured by the hydrogenation machine's own metering equipment from the hydrogenation machine 20 to be tested, so that the metering and verification device can perform a re-inspection to confirm the metering accuracy of the hydrogenation machine's own metering equipment.

[0025] Downstream of the air inlet 21, a pressure transmitter 22 and a mass flow meter 23 are connected in series through a pipeline. The pressure transmitter 22 is used to monitor the pressure in the pipeline, and the mass flow meter 23 is used to check and measure the hydrogen gas entering through the air inlet 21, so as to judge the measurement accuracy of the hydrogen filling machine's own measurement equipment. Among them, in this embodiment, the mass flow meter 23 adopts a high-precision mass flow meter 23, thereby ensuring the measurement accuracy of the device. In addition, in this embodiment, a temperature transmitter 24 is also provided between the air inlet 21 and the mass flow meter 23 to obtain the hydrogen temperature in the pipeline, and take temporary shutdown and other strategies in time according to the hydrogen temperature to avoid the adverse effects of excessively high hydrogen temperature on the measurement accuracy.

[0026] A flow metering branch 3 and a weighing metering branch 4 are connected in parallel downstream of the mass flow meter 23. Figure 2 , the flow metering branch 3 is connected in series with a first stop valve 31 and a gas filling port 32 through a pipeline from upstream to downstream. Among them, the first stop valve 31 is used to control the on-off of the flow metering branch 3 where it is located. In this embodiment, the first stop valve 31 adopts an electrically controlled valve. The gas filling port 32 is used to realize the connection between the metering and verification device and the fuel vehicle 33 to be filled with hydrogen, thereby forming a metering and filling passage from the air inlet 21 through the mass flow meter 23 and the flow metering branch 3 to the gas filling port 32, and the mass of hydrogen entering the metering and verification device is measured by the high-precision mass flow meter 23, and the measured value is compared with the hydrogenation machine metering value to check the metering accuracy of the hydrogenation machine. Among them, in this embodiment, the gas filling port 32 includes a number of gas filling ports of different structural types, and each gas filling port is connected in parallel. Its function is equivalent to the hydrogenation gun muzzle of the hydrogenation machine, which is used to realize safe and reliable connection with different types of fuel vehicles to achieve the purpose of hydrogen fuel filling.

[0027] The weighing and metering branch 4 is provided with a second stop valve 41 and a weighing device 42 in series through pipelines from upstream to downstream, wherein a weighing bottle 43 is relatively fixed and firmly provided at the weighing device 42. Specifically, the second stop valve 41 is used to control the on-off of the weighing and metering branch where it is located. In this embodiment, the second stop valve 41 adopts an electric control valve, thereby realizing automatic control of the on-off of the weighing and metering branch; the weighing bottle 43 is used to load hydrogen after being measured by the metering equipment of the hydrogenator 20 itself. Since the weighing bottle 43 and the weighing device 42 are relatively fixed, the precise weight of the weighing bottle 43 can be obtained through the weighing device 42; in this embodiment, the weighing device 42 has a peeling and zeroing function. Before the measurement test, the weight of the weighing bottle 43 is peeled and zeroed, thereby, the indication of the weighing device 42 can directly obtain the mass of the hydrogen filled in the weighing bottle 43. Since the metering and verification device forms a passage from the gas filling port 32 through the mass flow meter 23, the weighing and metering branch 4 to the weighing bottle 43 in sequence, the hydrogen measured by the metering equipment of the hydrogenator 20 itself is doubly measured by the mass flow meter 23 and the weighing device 42, so that the indication of the mass flow meter 23 is compared with the metering indication of the weighing device 42 to determine whether there is a metering error in the mass flow meter 23 or the weighing device 42, and corresponding correction measures are taken to eliminate the metering error; the metering indications accurately measured by the mass flow meter 23 and the weighing device 42 are then compared with the indications measured by the metering equipment of the hydrogenator 20 itself, so as to determine the accuracy of the hydrogenator's measurement.

[0028] The first stop valve 31 and the second stop valve 41 correspondingly arranged in the flow metering branch 3 and the weighing metering branch 4 can control the on and off of the flow metering branch 3 and the weighing metering branch 4 in which they are located according to test needs. Therefore, when there is a fuel cell vehicle to be filled in the metering test environment or the detection environment is relatively harsh, such as strong wind, the flow metering branch 3 is turned on and the weighing metering branch 4 is closed, and then the metering verification test is performed through the mass flow meter 23; when there is no fuel cell vehicle to be filled in the metering test environment, the weighing metering branch 4 is turned on and the flow metering branch 3 is closed, so that a dual redundant metering test is performed through the mass flow meter 23 and the weighing device 42, so that by comparing the indications between the mass flow meter 23 and the weighing device 42, the problem that when the weighing device 42 is used for metering detection in the prior art, the metering precision and accuracy of the weighing device 42 are easily affected by the surrounding environment such as wind, vibration, etc. is solved. In some other embodiments, in order to reduce the adverse effects of the surrounding environment on the weighing device 42, the weighing device 42 and the weighing bottle 42 are integrated into the shell, and a sponge layer of a certain thickness is provided between the weighing device 42 and the shell to reduce the adverse effects of vibration on the measurement of the weighing device 42. In addition, due to the arrangement of the first stop valve 31 and the second stop valve 32, the flow metering branch 3 and the weighing metering branch 4 can be connected separately, and then the pipeline between the air inlet 21 and the gas filling port 32 and the pipeline between the air inlet 21 and the weighing bottle 42 can be pressure-tested, and whether the indication sensed by the pressure transmitter 22 changes, it is judged whether there is leakage in the pipeline and the weighing bottle 42.

[0029] The hydrogen in the weighing bottle 42 needs to be released after being weighed and measured by the weighing device 42 for the next measurement. However, considering that direct release will lead to waste of hydrogen resources and a large amount of release in a short period of time will have certain risks. Therefore, in this embodiment, a release recovery pipeline 5 is set between the release main pipe and the weighing bottle 43, and the test hydrogen in the weighing bottle 43 is recycled and safely released through the release recovery pipeline 5. Figure 2 , a release recovery valve 51 and a fuel cell group 52 are connected in series in the release recovery pipeline 5 from upstream to downstream. Among them, the release recovery valve 51 is used to control the on-off of the pipeline in which it is located, and the release recovery pipeline 5 is only turned on during the release recovery process after the metering is completed, and then the hydrogen in the weighing bottle 43 enters the fuel cell group 52 through the pipeline, converting hydrogen energy into electrical energy, realizing the recycling of hydrogen, and the electrical energy generated by the fuel cell group 52 is then used to power the entire calibration device, solving the technical problem of difficulty in obtaining electricity under the special environment of the hydrogen filling station. In addition, since the hydrogen consumption of the fuel cell group 52 is limited, the fuel cell group 52 is also connected to the release main pipe to safely release the unused excess hydrogen.

[0030] See also Figure 2The metrological verification device also includes a power module 6, which can be powered by the mains, and in this example, the power module 6 is electrically connected to the fuel cell 52, and can also be powered by the fuel cell 52, thereby satisfying the diversity of power supply methods, and thus facilitating adaptation to different metrological test environments. In this example, the pressure transmitter 22, the mass flow meter 23, the temperature transmitter 24, and the weighing device 42 are connected to the power module 6 through an explosion-proof junction box 61, and the power module 6 provides the corresponding working voltage for each device, and the explosion-proof junction box 61 is used to avoid problems such as electric sparks at the connection points that affect the metrological safety.

[0031] In addition, the metrological verification device also includes a host computer 71 that interacts with the cloud database. The host computer 71 is used to control the verification process of the metrological verification device and store relevant verification data. Specifically, in order to obtain the indications of each sensor, valve body, and weighing device of the verification device, the metrological verification device also includes a wireless communication module. In this example, the wireless communication module is arranged in the explosion-proof junction box 61 and is powered by the power module 6. The wireless communication module is also respectively connected to the pressure transmitter 22, the mass flow meter 23, the temperature transmitter 24, and the weighing device 42. Data communication is realized with the host computer 71 through the wireless communication module. In this example, wifi wireless communication is specifically used.

[0032] In this example, in order to facilitate the acquisition of the displayed value of the hydrogen filling machine, the metering and calibration device also includes a camera terminal 72, which is used to monitor the metering indication on the display screen of the hydrogen filling machine, and the camera terminal is communicated with the host computer to send the metering indication displayed by the hydrogen filling machine to the host computer for comparison with the measured value of the metering and calibration device, so as to determine the metering accuracy of the hydrogen filling machine.

[0033] In addition, in this embodiment, an infrared communication module 8 is also provided for obtaining the filling information. Figure 2 , the infrared communication module 8 is electrically connected to the power module 6 through the explosion-proof junction box 61, and is powered by the power module 6. Infrared transceiver terminals are respectively provided at the gas filling port 32, the fuel bottle of the filling vehicle, and the weighing bottle 43, which are used to transmit the pressure, temperature and other information of the vehicle fuel bottle and the weighing bottle 43 through infrared signals. Among them, the hydrogenation gun of the hydrogenation machine to be tested is also provided with an infrared transceiver terminal, which is used to determine whether the hydrogenation gun of the hydrogenation machine to be tested has an infrared communication function. In this example, the infrared communication module 8 is connected to the wireless communication module for communication, and the relevant information of whether the fuel bottle, the weighing bottle and the hydrogenation machine to be tested have the infrared communication function is sent to the host computer through the wireless communication module.

[0034] See also Figure 2The measurement and verification device also includes a purge pipeline 9 for purging the pipelines and containers in the device before and after measurement. One end of the purge pipeline 9 is connected to the nitrogen source, and the other end is connected to the pipeline corresponding to the air inlet 21 and the mass flowmeter 23. In this embodiment, the nitrogen source is a nitrogen bottle filled with nitrogen, and a one-way valve and an electric control valve are connected in series in the nitrogen purge pipeline, wherein the one-way valve is used to ensure that the purge pipeline is unidirectional to avoid problems such as hydrogen backflow; the electric control valve is used to control the on-demand on-off of the purge pipeline, so as to purge the internal pipeline of the measurement and verification device before and after measurement to avoid residual air and hydrogen, which affects the measurement accuracy and safety.

[0035] In addition, this metering and calibration device can also be used for metering and calibration of hydrogenation columns and hydrogenation columns in hydrogenation stations. When used for metering and detection of hydrogenation columns, the air inlet of the calibration device is connected to the air inlet of the hydrogenation column, and a certain amount of hydrogen source is provided to the hydrogenation column by the tube bundle vehicle or the gas source in the station for metering and calibration. The metering accuracy of the hydrogenation column can be determined by comparing the metering value of the metering and calibration device with the metering value of the hydrogenation column's own metering equipment. When used for metering and detection of hydrogenation columns, the air inlet of the calibration device is connected to the tube bundle vehicle or the gas source in the station, and the gas filling port of the metering and calibration device is connected to the air inlet of the hydrogenation column. The metering accuracy of the hydrogenation column can be determined by comparing the metering value of the metering and calibration device with the metering value of the hydrogenation column's own metering equipment.

[0036] Although some preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0037] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the inventive concept. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A multi-purpose hydrogenation machine metering and calibration device, characterized in that: It includes a shell, an air inlet penetrated through the shell for corresponding communication with the hydrogenation gun of the hydrogenation machine to be tested, a pressure transmitter and a mass flow meter located in the shell and connected in series to the downstream of the air inlet through corresponding pipelines in sequence, and a flow metering branch and a weighing metering branch are provided in parallel downstream of the mass flow meter; the flow metering branch includes a first stop valve connected in series from upstream to downstream and a gas inlet for corresponding communication with the vehicle to be refueled; the weighing metering branch includes a second stop valve connected in series from upstream to downstream and a weighing device with a weighing bottle fixed relatively thereto; the multi-purpose hydrogenation machine metering and calibration device also includes a power module, a host computer, a camera terminal connected to the host computer for corresponding monitoring of the metering value of the hydrogenation machine, a wireless communication module for communicating with the host computer, and a release recovery pipeline correspondingly connected between the release main pipe and the weighing bottle; the release recovery pipeline includes a release recovery valve connected in series from upstream to downstream and a fuel cell group electrically connected to the power module in sequence.

2. The multi-purpose hydrogenation machine metering and calibration device according to claim 1, characterized in that: A plurality of running wheels with brakes are correspondingly arranged at the bottom of the shell.

3. The multi-purpose hydrogenation machine metering and calibration device according to claim 1, characterized in that: It also includes a temperature transmitter correspondingly arranged in the pipeline between the air inlet and the mass flow meter.

4. The multi-purpose hydrogenation machine metering and calibration device according to claim 1, characterized in that: It also includes an infrared communication module for correspondingly communicating with the hydrogen filling machine to be tested, the vehicle to be filled and / or the weighing bottle.

5. The multi-purpose hydrogenation machine metering and calibration device according to claim 4, characterized in that: Infrared transceiver terminals are respectively provided at the hydrogenation gun corresponding to the hydrogenation machine to be tested, the gas filling port, the fuel bottle of the filling vehicle and / or the weighing bottle.

6. The multi-purpose hydrogenation machine metering and calibration device according to claim 1, characterized in that: It also includes an explosion-proof junction box, through which the pressure transmitter, mass flow meter, weighing device and wireless communication module are respectively electrically connected to the power supply module.

7. The multi-purpose hydrogenation machine metering and calibration device according to claim 1, characterized in that: It also includes a purge pipeline connected to a nitrogen source and provided with a purge valve in the pipeline, and the purge pipeline is connected to a corresponding pipeline position between the air inlet and the pressure transmitter.

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