Pipeline structure of calibrating device of hydrogen filling machine

Abstract

The utility model discloses a pipeline structure of a calibrating device of a hydrogen adding machine, and aims to solve the problem that the conventional standard meter method is easily limited by detection environments such as whether a vehicle exists in a detection site or not when being used for metrological calibration. The metering pipeline is correspondingly communicated with the air inlet port and connected with a mass flow meter in series, and the filling pipeline and the weighing pipeline are connected to the downstream of the metering pipeline in parallel. A filling muzzle is correspondingly arranged at the downstream of the filling pipeline, and a weighing bottle relatively fixed on the weighing machine is correspondingly connected in series in the weighing pipeline; the downstream of the weighing bottle is correspondingly connected with a recovery pipeline; a hydrogen fuel battery pack for supplying power to the device is arranged in the recovery pipeline; the device further comprises a control end and an infrared communication module, wherein the control end is correspondingly communicated with the mass flow meter and the weighing device, and the infrared communication module is arranged at the gas inlet port and the filling muzzle and is correspondingly communicated with the control end. The device has the advantages of high environmental adaptability, accurate and reliable metering and the like.

Description

Technical Field

[0001] The present application relates to the technical field of fuel metering and calibration, and in particular to a piping structure of a hydrogenation machine calibration device. Background Art

[0002] Hydrogen energy is a highly efficient, clean energy source that uses hydrogen as a medium (for storage, transportation, and conversion) and produces water as a combustion product. Hydrogen can be produced in a variety of ways, including converting renewable energy sources such as solar energy, wind energy, and the potential energy of water into electricity. Hydrogen can be produced by electrolyzing water in electrolytic cells, and then stored at room temperature using high-efficiency hydrogen storage materials or transported via pipelines, ensuring high transport safety. Furthermore, the use of hydrogen fuel cells to generate electricity, replacing the pollution caused by current non-renewable fossil fuels, is a future direction for clean energy development.

[0003] Compressed hydrogen refueling machines for automobiles (referred to as hydrogen refueling machines) are specialized equipment used to provide compressed hydrogen fuel or natural gas-hydrogen mixed fuel filling services to hydrogen fuel vehicles, and are equipped with metering and pricing functions. The accuracy of the hydrogen refueling machine's metering is directly related to the economic interests of both trading parties. Therefore, regular metering tests are required before leaving the factory and during use.

[0004] One detection method known to the inventor is to use a standard meter method to detect the measurement accuracy of the hydrogen refueling machine. Specifically, a flow meter is used to measure the hydrogen output by the hydrogen refueling machine and compare it with the metering indication displayed by the hydrogen refueling machine to obtain the measurement result.

[0005] However, in the process of implementing the technical solutions in the embodiments of the present application, the inventors of the present application discovered that the above technology has at least the following technical problems: the standard meter method needs to be performed when refueling a fuel cell vehicle at a hydrogen refueling station. When there is no vehicle at the metering and detection site, the hydrogen refueling machine cannot be tested, resulting in limited detection and low efficiency.

[0006] 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 an admission or any form of suggestion that the information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0007] In view of at least one of the above technical problems, the present disclosure provides a piping structure for a hydrogenation machine calibration device, aiming to solve the problem that the existing standard meter method for metrological calibration is easily restricted by the detection environment, such as whether there are vehicles at the detection site.

[0008] According to one aspect of the present disclosure, a piping structure of a hydrogenation machine calibration device is provided, comprising an air inlet port for correspondingly matching the hydrogenation gun of the hydrogenation machine to be calibrated, a metering pipeline correspondingly connected to the air inlet port and connected in series with a mass flowmeter, and a filling pipeline and a weighing pipeline connected in parallel and arranged downstream of the metering pipeline; a filling gun nozzle is correspondingly provided downstream of the filling pipeline, and a weighing bottle relatively fixed on the weighing device is correspondingly connected in series in the weighing pipeline; a recovery pipeline is correspondingly provided downstream of the weighing bottle, and a hydrogen fuel cell group for powering the device is provided in the recovery pipeline; the piping structure of the hydrogenation machine calibration device also includes a control terminal correspondingly connected to the mass flowmeter and the weighing device for communication, and an infrared communication module is provided at the air inlet port and the filling gun nozzle and correspondingly connected to the control terminal for communication.

[0009] In some embodiments of the present disclosure, the pipeline structure of the hydrogenation machine calibration device includes at least one of the air inlet port and the filling nozzle, and the air inlet ports and the filling nozzles are correspondingly arranged in parallel.

[0010] In some embodiments of the present disclosure, the upstream of the filling pipeline, weighing pipeline and recovery pipeline are respectively connected in series with a control valve, and the metering pipeline is provided with a pressure transmitter and / or a temperature transmitter.

[0011] In some embodiments of the present disclosure, the pipeline structure of the hydrogenation machine calibration device also includes a purge pipeline that is connected to the corresponding nitrogen source and connected to the metering pipeline, and a one-way valve and a purge control valve are connected in series in the purge pipeline.

[0012] In some embodiments of the present disclosure, the pipeline structure of the hydrogen refueling machine calibration device further includes a power module electrically connected to the hydrogen fuel cell, and the power module is provided with a mains power interface.

[0013] In some embodiments of the present disclosure, the pipeline structure of the hydrogenation machine calibration device further includes an explosion-proof junction box, and the mass flow meter and the weighing device are electrically connected to the power module through the explosion-proof junction box.

[0014] In some embodiments of the present disclosure, the pipeline structure of the hydrogenation machine calibration device also includes a communication module that is correspondingly connected to the mass flow meter, weighing device, and infrared communication module and is used to communicate with the control end. The communication module is an RS485 or WIFI communication module.

[0015] In some embodiments of the present disclosure, the pipeline structure of the hydrogenation machine calibration device further includes a monitoring terminal that is communicatively connected to the control end and is used to monitor the metering indication on the display screen of the hydrogenation machine to be calibrated.

[0016] In some embodiments of the present disclosure, the pipeline structure of the hydrogenation machine calibration device further includes a venting pipeline corresponding to the recovery pipeline.

[0017] The one or more technical solutions provided in the embodiments of the present application have at least any of the following technical effects or advantages:

[0018] 1. The downstream of the metering pipeline of the pipeline structure of the hydrogen refueling machine testing device is connected in parallel with a filling pipeline and a weighing pipeline, so that the selection of the metering and testing mode can be realized by selecting the conduction of the filling pipeline or the weighing pipeline. A mass flow meter is connected in series in the metering pipeline, so that the mass flow meter can be individually metered while the fuel vehicle is refueled with hydrogen when the filling pipeline is individually conducted. When the weighing pipeline is individually conducted, the mass flow meter and the weighing device can be simultaneously metered to adapt to the situation that there is no fuel vehicle to be refueled in the detection environment, and the measurement error of the two can be found in time by comparing the values between the mass flow meter and the weighing device.

[0019] 2. The recovery pipeline downstream of the weighing bottle is connected to the hydrogen fuel cell group, on the one hand, the weighing bottle can be used as a hydrogen storage container for the hydrogen fuel cell group, and on the other hand, the hydrogen fuel cell group can be used as a recovery and utilization component for the test hydrogen in the weighing bottle, solving the problems of difficult power supply and low safety in the special explosion-proof environment of the hydrogen refueling station, and providing power for the testing device by the hydrogen fuel cell, which is high in energy utilization efficiency and safe in power supply.

[0020] 3. The explosion-proof junction box is electrically connected with the power module to realize the power supply of each component of the testing device, which can avoid the problems such as electric spark at the connection and solve the problem of affecting the safety of testing.

[0021] 4. The infrared communication module can judge whether the hydrogen refueling gun of the hydrogen refueling machine to be tested has infrared communication function through the feedback of whether there is infrared signal, and can obtain the filling information of the refueling vehicle and the weighing bottle, thereby providing control basis for the control of the testing process. DETAILED DESCRIPTION

[0022] Figure 1 It is a principle diagram of the pipeline structure of the hydrogen refueling machine testing device in an embodiment of the present application.

[0023] Figure 2 It is a circuit principle diagram of the RS485 communication part in an embodiment of the present application.

[0024] Figure 3 It is a circuit principle diagram of the infrared communication part in an embodiment of the present application.

[0025] In the above figures, 1 is a hydrogen filling machine to be tested, 21 is an air inlet port, 22 is a mass flow meter, 23 is a pressure transmitter, 3 is a filling pipeline, 31 is a filling gun port, 32 is a filling control valve, 4 is a weighing pipeline, 41 is a weighing bottle, 42 is a weigher, 43 is a weighing control valve, 5 is a recovery pipeline, 51 is a hydrogen fuel cell stack, 52 is a recovery control valve, 6 is a purge pipeline, 61 is a one-way valve, 62 is a purge control valve, 63 is a nitrogen source, 7 is a power module, 71 is an explosion-proof junction box, 72 is a mains power supply, 8 is a control end, 81 is a data transceiver, 82 is a monitoring terminal, 83 is a cloud server, 84 is a handheld control terminal, and 9 is an infrared communication module. DETAILED DESCRIPTION

[0026] The programs involved or relied on in the following examples are all conventional programs or simple programs in the technical field, and those skilled in the art can make conventional choices or adaptive adjustments according to specific application scenarios.

[0027] The sensors and other devices involved in the following examples are all conventional commercially available products unless otherwise specified.

[0028] The example discloses a hydrogen filling machine testing device pipeline structure, which re-measures the hydrogen gas measured by the metering equipment of the hydrogen filling machine itself to determine the metering accuracy of the hydrogen filling machine. For details, see Figure 1 To realize connection with the hydrogen filling gun of the hydrogen filling machine to be tested to obtain hydrogen gas measured by the hydrogen filling machine to be tested, in the example, the metering testing device pipeline includes an air inlet port 21 for communication with the hydrogen filling gun of the hydrogen filling machine to be tested. Considering that existing hydrogen filling guns have several different types, in order to improve the interface applicability of the testing device, three air inlet ports are provided in parallel in the example, which are respectively adapted to TK17, TK16, and TK25 type hydrogen filling guns, so as to facilitate metering and testing of various types of hydrogen filling machines.

[0029] The hydrogen gas entering the testing device through the air inlet port 21 enters the metering pipeline 2 communicating with the air inlet port 21. The metering pipeline is arranged downstream of the air inlet port 21, and a mass flow meter 22 is connected in series in the metering pipeline 2. In the example, a high-precision mass flow meter with model RHE21E21-E1D1-S0S1-A1 is used to accurately measure the mass of hydrogen gas passing through the metering pipeline 2. See Figure 1The downstream of the metering pipeline 2 is connected with the filling pipeline 3, and the other end of the filling pipeline 3 is connected with a plurality of filling nozzles 31 in parallel. Through the arrangement of the plurality of filling nozzles, different types of vehicle fuel bottles can be matched, and hydrogen fuel filling of the vehicle to be filled can be realized. Thus, the hydrogen gas flow path is formed from the inlet port 21 to the filling nozzles 31 through the metering pipeline 2 and the filling pipeline 3, the hydrogen gas output by the hydrogen filling machine is filled into the fuel bottle of the vehicle to be filled after being metered by the calibration device, and the quality flow meter 22 realizes the metering and calibration of the hydrogen gas output by the hydrogen filling machine. By comparing the metering value displayed by the hydrogen filling machine, it can be judged whether there is an error in the metering of the hydrogen filling machine.

[0030] The metering and calibration can be completed when the vehicle to be filled is in the hydrogen filling station through the filling pipeline 3, and is not affected by the test environment of the hydrogen filling station. However, when there is no vehicle to be filled in the station, the calibration operation cannot be carried out. Therefore, referring to Figure 1 In the embodiment, the downstream of the metering pipeline 2 is connected with the weighing pipeline 4 in parallel with the filling pipeline 3, and the downstream of the weighing pipeline 4 is provided with the weighing bottle 41 which is stably placed on the weighing device 42 to realize the weighing of the weighing bottle 41 by the weighing device 42. Specifically, when there is no vehicle to be filled in the hydrogen filling station during calibration, in order not to affect the calibration efficiency and process, the weighing pipeline 4 is turned on, the hydrogen gas metered by the quality flow meter 22 enters the weighing bottle 41 through the weighing pipeline 4, and the weighing device 42 is zeroed before the hydrogen gas enters the weighing bottle 41 to realize the weighing and metering of the hydrogen gas entering the weighing bottle 41. Thus, the metering data of the quality flow meter 22 and the weighing device 42 are obtained respectively in the process, and the metering error of the quality flow meter 22 or the weighing device 42 can be judged by comparing the two data. Under the premise that the metering of the quality flow meter 22 and the weighing device 42 is accurate, the metering accuracy of the hydrogen filling machine can be judged by comparing the metering value of the calibration device with the metering value of the hydrogen filling machine.

[0031] In order to select the metering mode of single quality flow meter metering or quality flow meter and weighing device metering at the same time during single metering calibration, referring to Figure 1, the upstream pipeline of the filling pipeline 3 and the weighing pipeline 4 is respectively connected with a filling control valve 32 and a weighing control valve 43, and in this embodiment, the filling control valve 32 and the weighing control valve 43 are respectively electric control valves. Thus, the two control valves control the opening and closing of the branch pipeline, and the purpose of selecting the metering mode is achieved. In addition, in this embodiment, a pressure transmitter 23 is arranged upstream of the mass flow meter 22 in the metering pipeline 2, so that the pressure of the hydrogen entering the testing device is monitored to ensure the safety of the testing. On the other hand, before the metering test, a certain pressure of hydrogen is filled into the pipeline of the testing device, and then the inlet and outlet of the testing device are closed. Whether the pressure value measured by the pressure transmitter 23 changes or not is used to determine whether the testing device has a leakage problem, which is beneficial to improve the safety of the testing. In other embodiments, considering that the temperature of the pressure hydrogen is too high and will affect the metering accuracy, a temperature transmitter is arranged upstream of the mass flow meter in the metering pipeline to monitor the temperature of the hydrogen entering the metering pipeline, so that cooling measures such as pausing the gas inlet can be taken in time to ensure the metering reliability.

[0032] Considering that the metering testing device needs power supply for work, and the special anti-explosion safety environment of the hydrogenation station leads to the difficulty of safe power supply. Therefore, referring to Figure 1 , the downstream of the weighing bottle 41 is provided with a recovery pipeline 5, which corresponds to the hydrogen fuel cell group 51, and the recovery control valve 52 for controlling the opening and closing of the pipeline is connected in series in the recovery pipeline 5. Thus, after the metering test is completed, the hydrogen in the weighing bottle 41 can be recovered into the hydrogen fuel cell group 51, and the hydrogen energy is converted into the electric energy required by the metering testing device. In this way, the problem of power supply of the device is solved while the hydrogen energy is recovered. In other embodiments, considering the safe treatment of the residual hydrogen in the weighing bottle after the test, the weighing bottle is also provided with a diffusion pipeline corresponding to the communication, and the residual hydrogen is diffused safely through the diffusion pipeline. In addition, referring to Figure 1 , in this embodiment, the purging pipeline 6 connected to the metering pipeline 2 is also included, and the internal pipeline of the testing device is purged before and after the test through the purging pipeline to avoid the adverse effects of impurities and residual hydrogen in the pipeline on the metering reliability and safety. Specifically, the one-way valve 61 and the purging control valve 62 are connected in series in the purging pipeline 6, and the purging pipeline 6 is connected to the nitrogen source. Nitrogen with stable properties is used for purging, and in this embodiment, the nitrogen tank 63 is used as the nitrogen source to realize the purging operation, and the one-way valve 61 is used to prevent the backflow of hydrogen into the purging pipeline 6.

[0033] To meet the power requirements of the various components within the calibration device, this example includes a power module 7, which is electrically connected to the hydrogen fuel cell stack 51 and features a mains power interface for connecting to a mains power source 72, thereby increasing the diversity and reliability of the power supply. Considering the safety and explosion-proof requirements of the calibration test, this example also includes an explosion-proof junction box 71. Electrical components such as the mass flowmeter 22, weighing device 42, and pressure transmitter 23 are electrically connected to the power module 7 via the explosion-proof junction box 71, preventing sparks at the wiring points from adversely affecting the safety of the metrological calibration.

[0034] In addition, a control terminal 8 is provided to achieve reliable control of the calibration process of the calibration device. In this embodiment, the control terminal 8 adopts a PC, which obtains the measured values ​​of each calibration metering device through the control terminal 8, and adjusts the corresponding valve body movement to realize the control of the calibration process. In order to realize the communication between the mass flow meter 22, the weighing device 42, the pressure transmitter 23 and other components and the control terminal 8, a communication module corresponding to the mass flow meter 22, the weighing device 42, and the pressure transmitter 23 is provided in this example. Similarly, to ensure the safety of the calibration, in this example, the communication module and each component are connected by wiring in an explosion-proof junction box. Specifically, in this example, the communication module is a WIFI communication module, which can realize wireless data transmission with the control terminal 8; in addition, in order to improve the applicability of the metering device, an RS485 communication module is also provided in this example, and a corresponding RS485 communication interface is provided to facilitate wired data transmission with the control terminal 8. For details, see Figure 2 and Figure 3 In this example, a data transceiver model SP485EEN 81 is used as the communication core. Its RO terminal serves as the data receiving terminal, its RE and DE terminals serve as data enabling terminals, and its DI terminal serves as the data transmitting terminal. These terminals are connected to the corresponding I / O ports of the microcontroller to achieve data transmission. Furthermore, in this example, the control terminal 8 communicates with the cloud server, which in turn controls the calibration device through the handheld control terminal 84 via the cloud server 83, thereby increasing control diversity.

[0035] In this embodiment, see Figure 1 The measurement and verification device also includes an infrared communication module 9, which includes several infrared communication terminals. Figure 3In the embodiment, an infrared communication module of model TFBS4711 is adopted, the TXD port of which is used as a data sending port, the RXD port is used as a data receiving port, and the SD non-port is used as an enable port, which are connected to the corresponding I / O ports of the single-chip microcomputer respectively to realize infrared communication. Further, the infrared communication module 9 is also in communication connection with the communication module to realize the transmission of data to the control end. Specifically, each infrared communication terminal is installed at each air inlet port or each filling gun port of the testing device or at a weighing bottle, wherein the infrared communication terminal installed at the air inlet port is used to interact with the hydrogenation gun of the hydrogenation machine to be tested to determine whether the hydrogenation gun of the hydrogenation machine to be tested has infrared communication function; the infrared communication terminal installed at each filling gun port of the testing device is used to transmit data between the fuel bottle of the vehicle to be filled and the fuel bottle to obtain the information of the filling pressure, temperature, rate and the like of the fuel bottle; and the infrared communication terminal installed at the weighing bottle is used to obtain the information of the filling pressure, temperature, rate and the like of the weighing bottle, thereby avoiding the influence of fast filling on the safety of filling measurement.

[0036] In addition, referring to Figure 1 The measurement testing device further comprises a monitoring terminal 82 in communication connection with the control end 8, which is used to monitor the measurement display value of the display screen of the hydrogenation machine to be tested in real time, and directly upload the measurement display value of the hydrogenation machine to the control end to compare with the measurement value of the measurement testing device, thereby avoiding the problem that the measurement result is unreliable due to human interference such as misreading of the measurement display value of the hydrogenation machine during the measurement process.

[0037] Although some preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to these embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all the preferred embodiments and all the changes and modifications falling within the scope of the present application.

[0038] Obviously, various modifications and changes can be made to the present application by those skilled in the art without departing from the spirit and scope of the present application. Thus, it is intended that the present application cover the modifications and changes as falling within the scope of the claims of the present application and their equivalents.

Claims

1. A piping structure for a hydrogenation machine calibration device, characterized in that: It includes an air inlet port for matching with the hydrogenation gun of the hydrogenator to be calibrated, a metering pipeline corresponding to the air inlet port and connected in series with a mass flowmeter, and a filling pipeline and a weighing pipeline connected in parallel at the downstream of the metering pipeline; a filling gun nozzle is provided at the downstream of the filling pipeline, and a weighing bottle relatively fixed on the weighing device is connected in series in the weighing pipeline; a recovery pipeline is provided at the downstream of the weighing bottle, and a hydrogen fuel cell group for powering the device is provided in the recovery pipeline; the pipeline structure of the hydrogenator calibration device also includes a control end corresponding to the communication connection with the mass flowmeter and the weighing device, and an infrared communication module is provided at the air inlet port and the filling gun nozzle and communicated with the control end.

2. The piping structure of the hydrogenation machine calibration device according to claim 1, characterized in that: It comprises at least one of the air inlet port and the filling nozzle, and the air inlet port and the filling nozzle are correspondingly arranged in parallel.

3. The piping structure of the hydrogenation machine calibration device according to claim 1, characterized in that: Control valves are connected in series to the upstream of the filling pipeline, weighing pipeline and recovery pipeline respectively, and a pressure transmitter and / or a temperature transmitter is provided in the metering pipeline.

4. The piping structure of the hydrogenation machine calibration device according to claim 1, characterized in that: It also includes a purge pipeline that is connected to the corresponding nitrogen source and is correspondingly connected to the metering pipeline. A one-way valve and a purge control valve are correspondingly connected in series in the purge pipeline.

5. The piping structure of the hydrogenation machine calibration device according to claim 1, characterized in that: It also includes a power supply module electrically connected to the hydrogen fuel cell, and the power supply module is provided with a mains power interface.

6. The piping structure of the hydrogenation machine calibration device according to claim 5, characterized in that: It also includes an explosion-proof junction box, through which the mass flow meter and the weighing device are electrically connected to the power supply module.

7. The piping structure of the hydrogenation machine calibration device according to claim 1, characterized in that: It also includes a communication module that is correspondingly connected to the mass flow meter, the weighing device, and the infrared communication module and is used to communicate with the control end. The communication module is an RS485 or WIFI communication module.

8. The piping structure of the hydrogenation machine calibration device according to claim 1, characterized in that: It also includes a monitoring terminal which is in communication with the control terminal and is used to monitor the metering indication on the display screen of the hydrogen filling machine to be inspected.

9. The piping structure of the hydrogenation machine calibration device according to claim 1, characterized in that: It also includes a discharge pipeline that is connected to the recovery pipeline.

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