Hydrogenation metering calibration and testing device and method

Abstract

This invention discloses a hydrogen metering calibration and testing device and method, including a chamber. The top of the chamber is set as an inclined surface, and a groove is formed in the inclined surface. An operating component is fixedly installed on the inner wall of the groove. The operating component includes a 35MPa inlet and a 35MPa outlet, both of which are fixedly installed on the outer wall of the groove. A calibration and testing component for calibrating and testing hydrogen metering is fixedly installed on the inner wall of the chamber. The calibration and testing component includes a standard hydrogen quantity measuring device and a calibration and verification device. This invention relates to the technical field of hydrogen metering devices. By setting up a calibration and verification device, a standard unit amount of hydrogen collected in a standard tube is transferred back to a calibration tube. The hydrogen quantity is then detected again by a gas mass flow sensor and a pressure sensor in the calibration tube, thereby calibrating and verifying the hydrogen quantity collected in the standard tube, thus improving the accuracy of hydrogen metering.

Description

Technical Field

[0001] This invention relates to a hydrogenation metering device, specifically a hydrogenation metering calibration and detection device and method. Background Technology

[0002] Hydrogen is the lightest known gas in the world. Its density is extremely low, only 1 / 14 that of air; that is, at standard atmospheric pressure and 0°C, the density of hydrogen is 0.0899 g / L. Hydrogen burns with oxygen to produce water, and the combustion products are pollution-free, making it widely used as a clean energy source. However, because hydrogen is flammable and explosive, its storage and transportation require compression into high-pressure hydrogen due to its low density, posing certain risks. Precise measurement of the hydrogen quantity is necessary when bottling high-pressure hydrogen. Accurate metering is generally required during hydrogen refueling. To ensure the accuracy of hydrogen metering equipment, it needs to be calibrated periodically. Existing calibration and testing devices for hydrogen metering generally use… Electronic equipment analyzes hydrogen quantity using a calibration schlieren method based on the traditional knife-edge schlieren optical path. This method works by adjusting the knife edge in fixed increments within the test area when no flow field is present, obtaining a series of schlieren images. The quantitative relationship between the change in knife-edge cutting amount and the change in image grayscale value is then derived from the changes in the image's grayscale value. This calibration method heavily relies on electronic equipment for measurement. During long-term use, electronic malfunctions can still occur, affecting the accuracy of hydrogen measurement. Verification of the equipment's measurement requires introducing a standard amount of hydrogen, necessitating the use of other equipment to measure a high-precision standard amount of hydrogen. It is inconvenient for the hydrogen metering device itself to perform multiple self-checks by drawing hydrogen quantities. Summary of the Invention

[0003] The purpose of this invention is to provide a hydrogenation metering calibration and detection device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A hydrogen metering calibration and testing device includes a chamber with a sloping top and a groove. An operating component is fixedly installed on the inner wall of the groove. The operating component includes a 35MPa inlet and a 35MPa outlet, both fixedly installed on the outer wall of the groove. A calibration and testing component for calibrating hydrogen metering is fixedly installed on the inner wall of the chamber. The calibration and testing component includes a standard hydrogen quantity measuring device and a calibration and verification device. The standard hydrogen quantity measuring device includes a standard tube, which is fixedly connected to the output end of the 35MPa inlet. The standard tube is used to draw a standard unit volume of hydrogen. The calibration and verification device includes a calibration tube, which is used to calibrate the standard unit volume of hydrogen metering in the standard tube.

[0006] In a preferred embodiment of the present invention, the standard hydrogen quantity measuring device includes a solenoid valve, which is fixedly installed on the outer wall of the starting end of a standard tube, and a compressor is fixedly installed on the outer wall of the standard tube.

[0007] In a preferred embodiment of the present invention, a check valve is fixedly connected to the output end of the compressor, and a gas mass flow sensor is fixedly installed at the output end of the check valve.

[0008] In a preferred embodiment of the present invention, a pressure sensor is fixedly installed on the outer wall of the standard tube, and the gas mass flow sensor and the pressure sensor are used together to measure the amount of hydrogen gas drawn into the standard tube. A solenoid valve is fixedly installed at the end of the standard tube.

[0009] In a preferred embodiment of the present invention, the calibration and verification device includes a second compressor, which is fixedly installed on the outer wall of the starting end of a first calibration tube. A second gas mass flow sensor is fixedly installed at the output end of the second compressor, and a second check valve is fixedly connected to the output end of the second gas mass flow sensor. A second pressure sensor is fixedly installed at the output end of the second check valve.

[0010] In a preferred embodiment of the present invention, a solenoid valve three is fixedly installed at one end of the calibration tube, an exhaust pipe one is fixedly connected to one end of the calibration tube, an air pump is fixedly installed on the outer wall of the exhaust pipe one, and the exhaust pipe one is fixedly connected to a 35MPa air outlet.

[0011] In a preferred embodiment of the present invention, the operating component includes a 70MPa air inlet and a 70MPa air outlet, both of which are fixedly installed on the inner wall of the groove, and the end of the 70MPa air inlet is fixedly connected to a standard pipe II.

[0012] In a preferred embodiment of the present invention, the standard tube is fixedly connected to the calibration tube, the output end of the calibration tube is fixedly connected to the exhaust tube, and the output end of the exhaust tube is fixedly connected to the 70MPa outlet end of the solenoid valve.

[0013] In a preferred embodiment of the present invention, the front outer wall of the compartment is rotatably connected to a movable door via a hinge, and universal wheels are rotatably connected to the four corners of the bottom of the compartment. A power interface is fixedly installed on the outer wall of the compartment for connecting an external power source to supply power to the equipment. A display screen is fixedly installed at the center of the outer wall of the groove, and operation buttons are fixedly installed below the display screen.

[0014] The operating instructions for the hydrogenation metering calibration and testing device, including specific operating steps, are as follows:

[0015] S1: Connect the external high-pressure hydrogen cylinder containing hydrogen to the 35MPa inlet through a hydrogen pipe and seal it in place. Connect the other empty high-pressure hydrogen cylinder to the 35MPa outlet through a hydrogen pipe and seal it in place.

[0016] S2: By opening the valve of the high-pressure hydrogen cylinder containing hydrogen, hydrogen is introduced into the 35MPa inlet. At this time, solenoid valve one is in the open state and solenoid valve two is in the closed state. Compressor one compresses the introduced hydrogen, so that the hydrogen is compressed and introduced into standard tube one. The amount of hydrogen introduced is monitored in real time by gas mass flow sensor one and the hydrogen pressure inside standard tube one is monitored in real time by pressure sensor one. When gas mass flow sensor one and pressure sensor one reach the preset value at the same time, compressor one is turned off and solenoid valve one is closed, so that a standard unit amount of hydrogen is obtained inside standard tube one.

[0017] S3: Close solenoid valve three and open solenoid valve two, allowing the compressed hydrogen in standard tube one to enter calibration tube one. Turn on compressor two, and the hydrogen in standard tube one will be transported to calibration tube one under the negative pressure of compressor two. The amount of hydrogen entering calibration tube one is monitored in real time by gas mass flow sensor two, and the hydrogen pressure in calibration tube one is monitored in real time by pressure sensor two. When all the hydrogen in standard tube one is drawn into calibration tube one, and gas mass flow sensor two and pressure sensor two can simultaneously reach the preset value, the calibration test of the standard hydrogen quantity measuring device can be completed and it meets the accuracy requirements.

[0018] S4: After calibration, open solenoid valve three to allow hydrogen gas in calibration tube one to enter exhaust pipe one. Then, turn on the gas pump to assist in discharging the hydrogen gas from calibration tube one through exhaust pipe one into the 35MPa outlet. The hydrogen gas is then collected through an empty high-pressure hydrogen cylinder.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0020] 1. By setting up a standard hydrogen quantity measuring device and a calibration and verification device, it is convenient to quickly calibrate the metering accuracy of the hydrogen metering device itself when measuring hydrogen quantity through the hydrogen metering device. By periodically calibrating and testing the hydrogen metering device, it is convenient to promptly detect whether the hydrogen metering device is working stably. To a certain extent, this can avoid situations where the hydrogen quantity added to other devices is significantly incorrect, facilitate self-calibration of the device accuracy, and improve the safety and stability of the device.

[0021] 2. By setting up a standard tube, hydrogen gas from the high-pressure hydrogen cylinder is compressed by a compressor and delivered to the standard tube. The standard tube is filled with compressed hydrogen gas, and the volume and pressure of the hydrogen gas are simultaneously detected by a gas mass flow sensor and a pressure sensor, thereby reducing the inspection error. The standard tube quickly picks up a standard unit amount of hydrogen gas, improving the accuracy of the test results.

[0022] 3. By setting up a calibration and verification device, the standard unit amount of hydrogen gas picked up in standard tube one is transferred back to calibration tube one. The amount of hydrogen gas is then detected again by the gas mass flow sensor two and pressure sensor two in calibration tube one. This process calibrates and verifies the amount of hydrogen gas collected in standard tube one, thereby improving the accuracy of hydrogen gas measurement. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0024] Figure 1 This is a schematic diagram of the main structure of the hydrogenation metering calibration and detection device.

[0025] Figure 2 This is a side view schematic diagram of the hydrogenation metering calibration and detection device;

[0026] Figure 3 A schematic diagram of the internal structure of the chamber in the hydrogenation metering calibration and testing device;

[0027] Figure 4 This is a schematic diagram of the calibration and detection components in a hydrogenation metering calibration and detection device.

[0028] Figure 5 A schematic diagram of the standard tube installation structure in a hydrogenation metering calibration and testing device;

[0029] Figure 6This is a schematic diagram of the detection tube structure in a hydrogenation metering calibration and testing device;

[0030] Figure 7 A schematic diagram of the rear view structure in a hydrogenation metering calibration and detection device;

[0031] Figure 8 This is a schematic diagram of the installation structure of the movable door in the hydrogenation metering calibration and testing device.

[0032] In the diagram: 100, 110, 120, 130, 200, 210, 220, 230, 240, 250, 260, 30MPa air inlet, 210, 220, 230, 240, 250, 260, 300, 310, 320, 330, 340, 350, 360, 400, 410, 420, 430, 440, 450, 460, 470, 500, 510, 520. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0034] Example 1: Figure 1-4 The system includes a chamber 100, the top of which is sloped and has a groove 110. An operating component is fixedly installed on the inner wall of the groove 110. The operating component includes a 35MPa inlet 200 and a 35MPa outlet 210, both of which are fixedly installed on the outer wall of the groove 110. A calibration and testing component (not shown in the figure) for calibrating and testing hydrogen measurement is fixedly installed on the inner wall of the chamber 100. The calibration and testing component includes a standard hydrogen measurement device and a calibration and verification device. The standard hydrogen measurement device includes a standard tube 300, which is fixedly connected to the output end of the 35MPa inlet 200. The standard tube 300 is used to draw a standard unit volume of hydrogen. The calibration and verification device includes a calibration tube 400, which is used to calibrate the standard unit volume of hydrogen measurement in the standard tube 300.

[0035] The specific practical scenario of this embodiment is as follows: the chamber 100 is set up to install the operation components and calibration and detection components. The 35MPa outlet 210 and the 35MPa inlet 200 are set up to measure and monitor the 35MPa hydrogen, so as to facilitate the introduction of 35MPa hydrogen into the hydrogen metering equipment. The standard tube 300 is set up to extract and store the standard amount of hydrogen, so as to cooperate with the calibration tube 400 to perform self-testing.

[0036] Example 2: Figure 4-5 The standard hydrogen quantity measuring device includes a solenoid valve 310, which is fixedly installed on the outer wall of the starting end of a standard tube 300. A compressor 320 is fixedly installed on the outer wall of the standard tube 300. A check valve 330 is fixedly connected to the output end of the compressor 320. A gas mass flow sensor 340 is fixedly installed at the output end of the check valve 330. A pressure sensor 350 is fixedly installed on the outer wall of the standard tube 300. The gas mass flow sensor 340 and the pressure sensor 350 are used to measure the amount of hydrogen drawn into the standard tube 300. A solenoid valve 360 ​​is fixedly installed at the end of the standard tube 300.

[0037] The specific practical scenario of this embodiment is as follows: A solenoid valve 310 is used to control the on / off state of the starting end of the standard tube 300; a compressor 320 is used to compress the hydrogen gas introduced into the standard tube 300, thereby collecting a standard unit amount of hydrogen gas in the standard tube 300; a check valve 330 is used to conveniently control the unidirectional flow and reverse cutoff of the standard tube 300, thereby reducing the risk of leakage; a gas mass flow sensor 340 (AWM43300VH) is used to detect the amount and mass of hydrogen gas entering the standard tube 300; a pressure sensor 350 is used to monitor the pressure generated by the hydrogen gas in the standard tube 300; and a solenoid valve 360 ​​is used to control the on / off state of the end of the standard tube 300.

[0038] Example 3: As Figure 4 and Figure 6 The calibration and verification device includes a compressor 2 420, which is fixedly installed on the outer wall of the starting end of calibration tube 1 400. A gas mass flow sensor 2 430 is fixedly installed at the output end of the compressor 2 420. A check valve 2 440 is fixedly connected to the output end of the gas mass flow sensor 2 430. A pressure sensor 2 450 is fixedly installed at the output end of the check valve 2 440. A solenoid valve 3 460 is fixedly installed at the end of calibration tube 1 400. An exhaust pipe 1 410 is fixedly connected to the end of calibration tube 1 400. An air pump 470 is fixedly installed on the outer wall of exhaust pipe 1 410. Exhaust pipe 1 410 is fixedly connected to a 35MPa outlet 210.

[0039] The specific practical scenario of this embodiment is as follows: a compressor 420 is set to compress the amount of hydrogen entering the calibration tube 510; a gas mass flow sensor 430 is an XP-3110; two types of gas mass flow sensors are set to improve the accuracy of the test results; a pressure sensor 450 is set to detect the hydrogen pressure in the calibration tube 400; an exhaust pipe 410 is set to exhaust the hydrogen; and a gas pump 470 is set to facilitate the efficiency of hydrogen exhaust.

[0040] Example 4: Figure 1 and Figure 2 The operating components include a 70MPa air inlet 220 and a 70MPa air outlet 230. Both the 70MPa air inlet 220 and the 70MPa air outlet 230 are fixedly installed on the inner wall of the groove 110. The end of the 70MPa air inlet 220 is fixedly connected to a standard pipe 2 500. The end of the standard pipe 2 500 is fixedly connected to a calibration pipe 2 510. The output end of the calibration pipe 2 510 is fixedly connected to an exhaust pipe 2 520. The output end of the exhaust pipe 2 520 and the end of the 70MPa air outlet 230 are fixedly connected to a solenoid valve 4.

[0041] The specific practical scenario of this embodiment is as follows: by setting a 70MPa air inlet 220 and a 70MPa air outlet 230, the hydrogen gas introduced into the equipment at 70MPa is calibrated and tested. The components connected to the calibration tube 2 510 and the exhaust tube 2 520 are configured the same as those of the standard tube 1 300 and the calibration tube 1 400.

[0042] Example 5: Figure 7 and Figure 8 The front outer wall of the compartment 100 is connected to the movable door 120 by a hinge. The four corners of the bottom of the compartment 100 are all connected to casters 130. The outer wall of the compartment 100 is fixedly installed with a power interface 260, which is used to connect an external power source to power the equipment. The center of the outer wall of the groove 110 is fixedly installed with a display screen 240, and the operation button 250 is fixedly installed below the display screen 240.

[0043] The specific practical scenario of this embodiment is as follows: the movable door 120 is used to seal the inner wall of the chamber 100, the casters 130 are used to facilitate the movement of the chamber 100, and the display screen 240 is used to display the working parameters of the equipment. The operating components include general standard parts or components known to those skilled in the art, and their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0044] The operating instructions for the hydrogenation metering calibration and testing device, including specific operating steps, are as follows:

[0045] S1: Connect the external high-pressure hydrogen cylinder containing hydrogen to the 35MPa inlet 200 through a hydrogen pipe and seal it in place. Connect the other empty high-pressure hydrogen cylinder to the 35MPa outlet 210 through a hydrogen pipe and seal it in place.

[0046] S2: By opening the valve of the high-pressure hydrogen cylinder containing hydrogen, hydrogen is introduced into the 35MPa inlet 200. At this time, solenoid valve 310 is in the open state and solenoid valve 360 ​​is in the closed state. The introduced hydrogen is compressed by compressor 320, so that the hydrogen is compressed and introduced into standard tube 300. The amount of hydrogen introduced is monitored in real time by gas mass flow sensor 340, and the hydrogen pressure inside standard tube 300 is monitored in real time by pressure sensor 350. When gas mass flow sensor 340 and pressure sensor 350 reach the preset value at the same time, compressor 320 is turned off and solenoid valve 310 is closed, so that a standard unit amount of hydrogen is obtained inside standard tube 300.

[0047] S3: Close solenoid valve 360 ​​and open solenoid valve 260, allowing the compressed hydrogen in standard tube 1300 to enter calibration tube 1400. Turn on compressor 2420, and the hydrogen in standard tube 1300 will be transported to calibration tube 1400 under the negative pressure of compressor 2420. The amount of hydrogen entering calibration tube 1400 is monitored in real time by gas mass flow sensor 2430, and the hydrogen pressure in calibration tube 1400 is monitored in real time by pressure sensor 2450. When all the hydrogen in standard tube 1300 is drawn into calibration tube 1400, and gas mass flow sensor 2430 and pressure sensor 2450 reach the preset values ​​simultaneously, the calibration test of the standard hydrogen quantity measuring device is completed and meets the accuracy requirements.

[0048] S4: After the calibration test is completed, the hydrogen in calibration tube 400 is allowed to enter exhaust pipe 410 by opening solenoid valve 3 460. The hydrogen in calibration tube 400 is discharged through exhaust pipe 410 to 35MPa outlet 210 by turning on air pump 470. Then the hydrogen is collected through empty high-pressure hydrogen cylinder.

[0049] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A hydrogenation metering calibration and detection device, comprising a chamber (100), wherein the top of the chamber (100) is configured as an inclined surface, and a groove (110) is formed at the inclined surface, wherein an operating component is fixedly installed on the inner wall of the groove (110), characterized in that, The operating components include a 35MPa inlet (200) and a 35MPa outlet (210), both of which are fixedly installed on the outer wall of the groove (110). A calibration and detection component for calibrating and detecting hydrogen measurement is fixedly installed on the inner wall of the chamber (100). The calibration and detection component includes a standard hydrogen measurement device and a calibration and verification device. The standard hydrogen measurement device includes a standard tube (300), which is fixedly connected to the output end of the 35MPa inlet (200). The standard tube (300) is used to draw a standard unit volume of hydrogen. The calibration and verification device includes a calibration tube (400), which is used to calibrate the standard unit volume of hydrogen measurement in the standard tube (300).

2. The hydrogenation metering calibration and detection device according to claim 1, characterized in that, The standard hydrogen quantity measuring device includes a solenoid valve (310), which is fixedly installed on the outer wall of the starting end of the standard tube (300), and a compressor (320) is fixedly installed on the outer wall of the standard tube (300).

3. The hydrogenation metering calibration and detection device according to claim 2, characterized in that, The output end of the compressor (320) is fixedly connected to the check valve (330), and the output end of the check valve (330) is fixedly installed with the gas mass flow sensor (340).

4. The hydrogenation metering calibration and detection device according to claim 3, characterized in that, Pressure sensor 1 (350) is fixedly installed on the outer wall of the standard tube 1 (300). Gas mass flow sensor 1 (340) and pressure sensor 1 (350) are used together to measure the amount of hydrogen gas inhaled in the standard tube 1 (300). Solenoid valve 2 (360) is fixedly installed at the end of the standard tube 1 (300).

5. The hydrogenation metering calibration and detection device according to claim 1, characterized in that, The calibration and verification device includes a second compressor (420), which is fixedly installed on the outer wall of the starting end of the first calibration tube (400). A second gas mass flow sensor (430) is fixedly installed at the output end of the second compressor (420). A second check valve (440) is fixedly connected to the output end of the second gas mass flow sensor (430). A second pressure sensor (450) is fixedly installed at the output end of the second check valve (440).

6. The hydrogenation metering calibration and detection device according to claim 5, characterized in that, Solenoid valve three (460) is fixedly installed at the end of calibration tube one (400), exhaust pipe one (410) is fixedly connected at the end of calibration tube one (400), air pump (470) is fixedly installed on the outer wall of exhaust pipe one (410), and exhaust pipe one (410) is fixedly connected to 35MPa air outlet (210).

7. The hydrogenation metering calibration and detection device according to claim 1, characterized in that, The operating components include a 70MPa air inlet (220) and a 70MPa air outlet (230), both of which are fixedly installed on the inner wall of the groove (110). The end of the 70MPa air inlet (220) is fixedly connected to a standard pipe (500).

8. The hydrogenation metering calibration and detection device according to claim 7, characterized in that, The standard pipe two (500) is fixedly connected to the calibration pipe two (510) at one end, the output end of the calibration pipe two (510) is fixedly connected to the exhaust pipe two (520), and the output end of the exhaust pipe two (520) is fixedly connected to the end of the 70MPa air outlet (230) to the solenoid valve four.

9. The hydrogenation metering calibration and detection device according to claim 1, characterized in that, The front outer wall of the compartment (100) is connected to a movable door (120) via a hinge. The four corners of the bottom of the compartment (100) are all connected to casters (130). A power interface (260) is fixedly installed on the outer wall of the compartment (100). The power interface (260) is used to connect an external power source to supply power to the equipment. A display screen (240) is fixedly installed at the center of the outer wall of the groove (110). An operation button (250) is fixedly installed below the display screen (240).

10. The method of using the hydrogenation metering calibration and detection device, characterized in that, The specific operating steps are as follows: S1: Connect the external high-pressure hydrogen cylinder containing hydrogen to the 35MPa inlet (200) through a hydrogen pipe and seal it in place. Connect the other empty high-pressure hydrogen cylinder to the 35MPa outlet (210) through a hydrogen pipe. S2: By opening the valve of the high-pressure hydrogen cylinder containing hydrogen, hydrogen is introduced into the 35MPa inlet (200). At this time, solenoid valve one (310) is in the conducting state and solenoid valve two (360) is in the closed state. The introduced hydrogen is compressed by compressor one (320) so that the hydrogen is compressed and introduced into standard tube one (300). The amount of introduced hydrogen is monitored in real time by gas mass flow sensor one (340) and the hydrogen pressure inside standard tube one (300) is monitored in real time by pressure sensor one (350). When gas mass flow sensor one (340) and pressure sensor one (350) reach the preset value at the same time, compressor one (320) is turned off and solenoid valve one (310) is turned off at the same time, so that a standard unit amount of hydrogen is obtained inside standard tube one (300). S3: Close solenoid valve three (460) and open solenoid valve two (360) to allow the compressed hydrogen in standard tube one (300) to enter calibration tube one (400). Turn on compressor two (420) to transport the hydrogen in standard tube one (300) to calibration tube one (400) under the negative pressure of compressor two (420). The amount of hydrogen entering calibration tube one (400) is monitored in real time by gas mass flow sensor two (430), and the hydrogen pressure in calibration tube one (400) is monitored in real time by pressure sensor two (450). When all the hydrogen in standard tube one (300) is drawn into calibration tube one (400), and gas mass flow sensor two (430) and pressure sensor two (450) can reach the preset value at the same time, the calibration test of the standard hydrogen quantity measuring device can be completed and the accuracy requirements are met. S4: After the calibration test is completed, the hydrogen in calibration tube 1 (400) is allowed to enter exhaust tube 1 (410) by opening solenoid valve 3 (460). The hydrogen in calibration tube 1 (400) is discharged through exhaust tube 1 (410) to the 35MPa outlet (210) by turning on the air pump (470). Then the hydrogen is collected through an empty high-pressure hydrogen cylinder.

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