CN114993398A - Hydrogenation machine on-site calibrating device applying mass flow meter - Google Patents
Hydrogenation machine on-site calibrating device applying mass flow meter Download PDFInfo
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- CN114993398A CN114993398A CN202210928492.5A CN202210928492A CN114993398A CN 114993398 A CN114993398 A CN 114993398A CN 202210928492 A CN202210928492 A CN 202210928492A CN 114993398 A CN114993398 A CN 114993398A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/845—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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Abstract
The application discloses use mass flow meter's on-spot calibrating installation of hydrogenation machine includes: the gas filling pipe group comprises a gas inlet pipeline, a flow pipeline and a gas filling pipeline in sequence along the gas flow direction; the flow pipeline is provided with a mass flowmeter, and the mass flowmeter comprises an upstream interface flow channel, a flow dividing flow channel, a sensor measuring inner flow channel, a confluence flow channel and a sensor downstream interface flow channel which are sequentially communicated; the upstream interface flow passage and the downstream interface flow passage are communicated with the flow passage; the ratio of the flow area of the upstream interface flow channel to the flow area of the shunting flow channel is equal to the ratio of the sum of the flow areas of the inner flow channels measured by the sensor to the flow area of the converging flow channel, so that the temperature rise of the shunting flow channel is consistent with that of the converging flow channel when gas flows through the mass flow meter, and the problem that in the related technology, a temperature gradient is formed by a mass flow meter due to a throttling effect, zero drift is generated, and the result error jumps is solved.
Description
Technical Field
The application relates to the technical field of verification equipment, in particular to a hydrogenation machine field verification device applying a mass flow meter.
Background
In recent years, under the large background that the environmental pollution of China is increasingly serious, the nation strongly supports the development of fuel cell automobiles. However, the popularization of fuel cell vehicles requires the support of a ground refueling system, and the popularization of refueling stations is imperative. The country also follows the corresponding technical specifications of the construction of a hydrogen station, and a hydrogen gas dispenser is taken as one of important components of the hydrogen station and plays roles in filling a hydrogen fuel cell automobile test, filling and testing a vehicle-mounted hydrogen storage system and the like.
In the hydrogen filling process, trade settlement is involved, and the hydrogen filling machine is subjected to forced verification according to the requirements of the national metering law. To this end, the related art provides an assay device for assaying hydrogen gas by a mass flow meter in the assay device. However, when the existing calibrating device is used for calibrating in the hydrogenation process, the mass flow meter forms a temperature gradient due to the throttling effect, and then zero drift is generated, so that a measurement error is caused.
Disclosure of Invention
The main purpose of the present application is to provide a hydrogenation unit on-site calibration device using a mass flow meter, so as to solve the problem that the mass flow meter in the related art forms a temperature gradient due to a throttling effect during calibration, and then generates zero drift, which causes a jump of result error.
In order to achieve the above object, the present application provides a hydrogenation unit on-site verification apparatus using a mass flow meter, comprising:
the gas filling pipe group comprises a gas inlet pipeline, a flow pipeline and a gas filling pipeline in sequence along the gas flow direction;
the flow pipeline is provided with a mass flow meter, and the mass flow meter comprises an upstream interface flow channel, a flow dividing flow channel, a sensor measuring inner flow channel, a confluence flow channel and a sensor downstream interface flow channel which are sequentially communicated;
the upstream interface flow passage and the downstream interface flow passage are communicated with the flow passage;
the ratio of the flow area of the upstream interface flow channel to the flow area of the shunting flow channel is equal to the ratio of the sum of the flow areas of the inner flow channels measured by the sensor to the flow area of the converging flow channel, so that the temperature rise of the shunting flow channel is consistent with the temperature rise of the converging flow channel when gas flows through the mass flow meter.
Furthermore, the sensor measuring inner flow channels are arranged into two parallel groups, the inner diameter of the flow dividing flow channel is the same as that of the flow converging flow, and the inner diameter of the upstream interface flow channel is twice that of the single sensor measuring inner flow channel.
Further, a pressure transmitter is arranged on the flow pipeline, and the pressure transmitter and the mass flowmeter are sequentially arranged along the flowing direction of the gas;
the mass flow meter and the pressure transmitter are electrically connected with the data acquisition terminal and transmit gas flow data and pressure data in the flow pipeline to the data acquisition terminal.
The gas-liquid separator further comprises an exhaust pipeline connected with the gas filling pipeline in parallel to the flow pipeline, an exhaust valve is arranged on the exhaust pipeline, and a gas return port and a discharge port are connected with the exhaust pipeline in parallel; the gas return port is used for collecting gas released when the filling vehicle is disassembled from the filling pipe;
and the exhaust port is used for discharging the gas in the gas filling pipe group and the gas collected by the gas return port after gas filling is finished.
Further, the hydrogen leakage detection device is further included, and the hydrogen leakage detection device is electrically connected with the data acquisition terminal and used for acquiring a hydrogen leakage detection signal.
Further, the air inlet pipeline comprises a large-caliber air inlet pipeline and a small-caliber air inlet pipeline which are connected to the first end of the flow pipeline in parallel;
the gas filling pipeline comprises a large-caliber gas filling pipeline and a small-caliber gas filling pipeline which are connected to the second end of the flowing pipeline in parallel.
Furthermore, the large-caliber gas adding pipeline and the small-caliber gas adding pipeline are both provided with a one-way valve and a control valve.
Furthermore, the air charging device also comprises a shell, wherein the air charging pipe is assembled in the shell;
the air inlet ends of the large-caliber air inlet pipeline and the small-caliber air inlet pipeline extend out of the shell;
the air outlet ends of the large-caliber air inlet pipeline and the small-caliber air inlet pipeline extend out of the shell;
the exhaust end of the exhaust port extends out of the housing.
Further, the shell is also provided with an exhaust controller for controlling the opening and closing of the exhaust valve, and
a large gas adding controller for controlling the control valve on the large-caliber gas adding pipeline to be opened and closed, and
and the small gas adding controller is used for controlling the opening and closing of the control valve on the small-caliber gas adding pipeline.
Further, an air-entrapping inclined plane and an air inlet inclined plane are arranged on the shell;
the air inlet ends of the large-caliber air inlet pipeline and the small-caliber air inlet pipeline are positioned on the air inlet inclined plane, so that the filling pipe of the air dispenser can be inserted on the large-caliber air inlet pipeline or/and the small-caliber air inlet pipeline at an acute angle with the horizontal plane;
the air outlet ends of the large-caliber air inlet pipeline and the small-caliber air inlet pipeline are positioned on the air-entrapping inclined plane, so that the air-entrapping gun can be inserted into the large-caliber air inlet pipeline or/and the small-caliber air inlet pipeline at an acute angle with the horizontal plane.
Further, the inclination of the air-entrapping inclined plane is greater than that of the air-admitting inclined plane;
the inclination of the air-entrapping inclined plane is 40-50 degrees, and the inclination of the air-inlet inclined plane is 15-25 degrees.
Further, a power interface and a data interface are arranged on the shell, the power interface is used for being externally connected with a power supply, and the data interface is electrically connected with the hydrogen leakage detector and the mass flow meter and is used for being connected with a data acquisition terminal through a data line.
Furthermore, the exhaust port is located at the bottom of the shell and is provided with symmetrical horizontal exhaust paths with opposite exhaust directions, so that the reaction force of the airflow is balanced symmetrically during exhaust.
In the embodiment of the application, the gas filling pipe group is arranged and sequentially comprises a gas inlet pipeline, a flow pipeline and a gas filling pipeline along the gas flow direction; the flow pipeline is provided with a mass flowmeter, and the mass flowmeter comprises an upstream interface flow channel, a flow dividing flow channel, a sensor measuring inner flow channel, a confluence flow channel and a sensor downstream interface flow channel which are sequentially communicated; the upstream interface flow passage and the downstream interface flow passage are communicated with the flow passage; the ratio of the flow area of the upstream interface flow channel to the flow area of the shunting flow channel is equal to the ratio of the sum of the flow areas of the inner flow channels measured by the sensor to the flow area of the confluence flow channel, so that the temperature rise of the gas flowing through the mass flow timing shunting flow channel is consistent with the temperature rise of the confluence flow channel, the purpose of enabling the change of the section from the upstream interface flow channel to the shunting flow channel to be consistent with the change of the section from the inner flow channel to the confluence flow channel measured by the sensor is achieved, the temperature rise of the gas flowing through the mass flow timing shunting flow channel is consistent with the temperature rise of the confluence flow channel, the formation of a temperature gradient is avoided, the technical effect of on-site measurement precision of the calibrating device is improved, and the problem that when the calibrating device in the related technology is used, the mass flow meter forms a temperature gradient due to a throttling effect, zero drift is generated, and the result error jumps is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a schematic structural diagram according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional structural view of a mass flow meter according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an axial structure of a housing according to an embodiment of the present disclosure;
FIG. 4 is a schematic view of another axial structure of a housing according to an embodiment of the present application;
FIG. 5 is a rear view of a housing according to an embodiment of the present application;
the system comprises a flow pipeline 101, an air inlet pipeline 102, an air inlet pipeline 1021 with a large caliber, an air inlet pipeline 1022 with a small caliber, an air inlet pipeline 103, an air inlet pipeline 1031 with a large caliber, an air inlet pipeline 1032 with a small caliber, a pressure transmitter 2, a mass flow meter 3, an upstream interface flow channel 31, a shunt flow channel 32, a sensor measurement inner flow channel 33, a confluence flow channel 34, a downstream interface flow channel 35, a check valve 4, a control valve 5, an exhaust port 6, an exhaust path 61, an air return port 7, an exhaust pipeline 8, an exhaust valve 9, a data acquisition terminal 10, a hydrogen leakage detector 11, an air inlet inclined plane 12, a power supply interface 13, a data interface 14, a large air inlet controller 15, an exhaust controller 16, an air inlet inclined plane 17, a small air inlet controller 18 and a shell 19.
Detailed Description
In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used.
In this application, the terms "upper", "lower", "inside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "disposed," "provided," "connected," "secured," and the like are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In the hydrogen filling process, trade settlement is involved, and the forced verification of the hydrogen filling machine is implemented according to the requirements of the national metering law. To this end, the related art provides an assay device for assaying hydrogen gas by a mass flow meter in the assay device. However, when the existing calibrating device is used for calibrating in the hydrogenation process, the mass flow meter forms a temperature gradient due to the throttling effect, and then zero drift is generated, so that the result error jumps.
More specifically, through structural analysis of the mass flow meter sensor, it is known that the coriolis mass flow meter is a resonance type sensor, and when a temperature gradient exists in a measurement pipe portion participating in vibration, the natural vibration frequencies on both sides of the measurement pipe also differ, thereby causing a phase difference between left and right signal detectors, which is a cause of zero drift.
Further, the mass flow meter for hydrogen verification at present is a double-tube parallel structure, and a flow dividing port and a flow converging port are respectively arranged at two ends of the sensor, so that the medium to be detected is uniformly distributed into two measuring tubes. Therefore, the flow cross-sectional area between the measuring tube and the interface changes, in addition, the two ends of the sensor are respectively connected with the gas adding pipeline, and the gas adding pipeline and the branch port also have the flow cross-sectional area changes. From thermodynamic theory, it is known that when gas flows in a pipe, its pressure and temperature drop significantly due to local resistance, such as when encountering constrictions and regulating valves, a phenomenon known as throttling. Therefore, in the inflating process of the calibrating device, two throttling refrigeration parts are arranged in the sensor flow channel and are respectively positioned at the flow dividing port and the flow converging port; since the cross-sectional flow area at the branch point varies more than at the junction, the former decreases in temperature more than the latter, and accordingly, the measurement pipe near the branch point becomes cooler to form a temperature gradient along the inner measurement pipe from the inlet to the outlet of the flow meter, causing measurement errors.
Therefore, the problem of errors caused by inconsistent temperature rise at the shunting and converging positions at the two ends of the flow in the mass flowmeter 3 of the calibrating device in the related art is solved. As shown in fig. 1, an embodiment of the present application provides a hydrogenation machine on-site verification apparatus using a mass flow meter, including:
the gas filling pipe group comprises a gas inlet pipeline 102, a flow pipeline 101 and a gas filling pipeline 103 in sequence along the gas flow direction;
the flow pipeline 101 is provided with a mass flow meter 3, as shown in fig. 2, the mass flow meter 3 includes an upstream interface flow passage 31, a flow dividing flow passage 32, a sensor measurement inner flow passage 33, a confluence flow passage 34 and a sensor downstream interface flow passage 35 which are sequentially communicated;
the upstream interface flow path 31 and the downstream interface flow path 35 communicate with the flow path;
the ratio of the flow area of the upstream interface flow channel 31 to the flow area of the branch flow channel 32 is equal to the ratio of the sum of the flow areas of the sensor measurement inner flow channels 33 to the flow area of the confluence flow channel 34, so that the temperature rise of the branch flow channel is consistent with the temperature rise of the confluence flow channel when the gas flows through the mass flow meter 3.
In this embodiment, the gas filling pipe set is composed of an air inlet pipeline 102, a flow pipeline 101 and a gas filling pipeline 103, and the air inlet pipeline 102, the flow pipeline 101 and the gas filling pipeline 103 may be three separate pipelines or may be three parts of an entire pipeline. The air inlet pipeline 102 is provided with an air inlet for connecting a filling pipe of the gas filling machine, and the gas filling pipeline 103 is provided with a gas filling port for connecting a gas filling gun. The hydrogen in the gas charger flows into the calibrating device through the gas inlet pipeline 102, flows to the gas charging pipeline 103 after flowing through the mass flow meter 3 on the flow pipeline 101, and is charged through the gas charging gun by the gas charging pipeline 103.
In the filling process, the flow of the hydrogen is detected and obtained by the mass flow meter 3, the obtained flow data can be transmitted to the data acquisition terminal 10 in a wired or wireless mode, and the data acquisition terminal 10 can be an industrial computer. Since the flow rate detection error of hydrogen gas is mainly caused by the mass flow meter 3, the present application focuses on improvement of the internal structure of the mass flow meter 3.
Specifically, the flow passage in the mass flow meter 3 is divided into an upstream interface flow passage 31, a branch flow passage 32, a sensor measurement inner flow passage 33, a confluence flow passage 34, and a sensor downstream interface flow passage 35 in this order along the flow direction of the hydrogen gas. The upstream interface flow path 31 is connected to the inlet end of the flow line 101, and the downstream interface flow path 35 is connected to the outlet end of the flow line 101. The split flow channel 32 is used for splitting the hydrogen output by the upstream interface flow channel 31 and inputting the split hydrogen into the sensor measurement inner flow channel 33, and the confluence flow channel 34 is used for merging the hydrogen output by the sensor measurement inner flow channel 33 and inputting the merged hydrogen into the sensor downstream interface flow channel 35.
The present embodiment improves the variation width from the cross section of the upstream interface flow passage 31 to the cross section of the branch flow passage 32, and the variation width from the cross section of the sensor measurement inner flow passage 33 to the cross section of the confluence flow rate, so that the variation widths at both positions are the same. Specifically, the ratio of the inner diameter of the upstream interface flow passage 31 to the inner diameter of the flow dividing flow passage 32 is equal to the ratio of the inner diameter of the inner flow passage 33 measured by the sensor to the inner diameter of the flow converging flow passage 34 measured by the sensor, so that when hydrogen flows through two places with suddenly enlarged sections, temperature rise is consistent, temperature gradient caused by inconsistent temperatures at the two places is avoided, and the field measurement accuracy of the mass flow meter 3 is improved. When there are a plurality of sensor measurement inner flow passages 33, the ratio of the sum of the flow areas of the plurality of sensor measurement inner flow passages 33 to the flow area of the confluence flow passage 34 is equal to the ratio of the flow area of the upstream interface flow passage 31 to the flow area of the integral flow passage 32.
In the present embodiment, the sensor measurement inner passages 33 in the mass flow meter 3 are provided in two sets in parallel, the inner diameter of the branch flow passage 32 is the same as the inner diameter of the confluence flow rate, and the inner diameter of the upstream interface flow passage 31 is twice as large as the inner diameter of the single sensor measurement inner passage 33. In other words, the flow area of the branch flow passage 32 is the same as the flow area of the confluence flow rate, and the flow area of the upstream interface flow passage 31 is twice as large as the flow area of the single sensor measurement inner flow passage 33.
Specifically, since the joule thomson effect causing the temperature gradient mainly occurs at a place where the aperture is suddenly increased, which corresponds to the positions of the outlet of the upstream interface flow channel 31 of the mass flow meter 3 and the outlet of the sensor measurement inner flow channel 33, when the inner diameters of the branch flow channel 32 and the confluence flow channel 34 are the same, only the inner diameters of the upstream interface flow channel 31 and the sensor measurement inner flow channel 33 need to be adjusted, that is, the inner diameter of the upstream interface flow channel 31 is adjusted to be twice the inner diameter of the single sensor measurement inner flow channel 33. The above adjustment can make the cross-sectional changes of the hydrogen gas flowing into the flow dividing channel 32 and the flow converging channel 34 consistent, thereby avoiding the generation of temperature gradient.
Because the hydrogen has certain pressure in the gas filling process, the pressure is also an important index influencing the gas filling safety. For this purpose, as shown in fig. 1, the present embodiment further provides a pressure transmitter 2 on the flow pipeline 101, and the pressure transmitter 2 and the mass flow meter 3 are sequentially arranged along the flow direction of the gas; the mass flow meter 3 is electrically connected to the data acquisition terminal 10, and transmits the gas flow data in the flow pipeline 101 to the data acquisition terminal 10.
It is understood that the pressure transmitter 2 can also be electrically connected to the data acquisition terminal 10, so as to feed back the real-time pressure of the hydrogen gas in the pipeline to the data acquisition terminal 10 during the gas filling process. In order to further improve the safety of hydrogen filling, the hydrogenation on-site calibrating apparatus using the mass flow meter in this embodiment further includes a hydrogen leakage detector 11, and the hydrogen leakage detector 11 is electrically connected to the data acquisition terminal 10 and is configured to obtain a hydrogen leakage detection signal. The data acquisition terminal 10 may be a control computer, and may acquire the flow rate, pressure, and hydrogen leakage information of hydrogen gas during filling, and calculate the metering error of the gas filling machine according to the information. The basic data of the metering error is the gas filling amount which is displayed by the gas filling machine and is used as a settlement basis, the difference value of the hydrogen flow actually monitored by the mass flow meter 3, and the hydrogen leakage value monitored by the hydrogen leakage detector 11.
As shown in fig. 1, since a part of gas is released by a vehicle to be filled when a filling pipeline connected with a gas dispenser is detached after filling is completed, in order to collect and uniformly discharge the part of gas, the calibrating device in this embodiment further includes an exhaust pipeline 8 connected in parallel with the gas filling pipeline 103 on the flow pipeline 101, an exhaust valve 9 is arranged on the exhaust pipeline 8, and a return air port 7 and a discharge port are connected in parallel on the exhaust pipeline 8; the gas return opening 7 is used for collecting gas released when the filling vehicle is disassembled from the filling pipe; the exhaust port 6 is used for discharging gas in the gas filling pipe group and gas collected by the gas return port 7 after gas filling is finished.
Specifically, it should be noted that the air return port 7 is connected to the air filling gun through a hose, the exhaust valve 9 is in a closed state during the filling process, the filling pipeline is removed after the filling is completed, the exhaust valve 9 is opened, and both the hydrogen in the air filling pipe group of the calibration device and the hydrogen collected by the air return port 7 can be uniformly decompressed and discharged through the exhaust port 6.
As shown in fig. 1, since it is necessary to match gas dispensers with different calibers during the verification process, the gas inlet pipeline 102 in this embodiment includes a large-caliber gas inlet pipeline 1021 and a small-caliber gas inlet pipeline 1022 which are connected in parallel to the first end of the flow pipeline 101; the air dispenser can be matched with air dispensers with at least two calibers through the large-caliber air inlet pipeline 1021 and the small-caliber air inlet pipeline 1022, so that the air dispenser is more flexible to use;
since the filled vehicle has a different filling caliber, the gas filling line 103 in this embodiment includes a large caliber gas filling line 1031 and a small caliber gas filling line 1032 connected in parallel to the second end of the flow line 101. Make it can match the filling vehicle of two kinds of bores at least through heavy-calibre gas supply pipe 1031 and small-calibre gas supply pipe 1032, further improve and use the flexibility, improve detection efficiency.
In order to facilitate selective use of the large-caliber gas adding pipeline 103 and the small-caliber gas adding pipeline 1032 according to the filling calibers of the vehicle, the large-caliber gas adding pipeline 1031 and the small-caliber gas adding pipeline 1032 are both provided with one-way valves 4 and control valves 5, the gas adding pipeline 103 with the corresponding calibers can be used by opening the corresponding control valves 5, and the existence of the one-way valves 4 enables only gas in the calibrating device to be discharged in the exhaust process.
As shown in fig. 3 to 5, in order to facilitate the flexible use of the calibrating apparatus, the present embodiment integrates the components in the calibrating apparatus, i.e. the calibrating apparatus further comprises a housing 19, and the gas supply pipe is assembled in the housing 19; the air inlet ends of the large-caliber air inlet pipeline 1021 and the small-caliber air inlet pipeline 1022 extend out of the shell 19; the air outlet ends of the large-caliber air adding pipeline 1031 and the small-caliber air adding pipeline 1032 extend out of the shell 19; the exhaust end of the exhaust port 6 extends out of the housing 19.
In order to facilitate the rapid opening and closing control of the exhaust valve 9 and the control valve 5 connected to the gas filling pipe set, the housing 19 of the present embodiment is further provided with a gas exhaust controller 16 for controlling the opening and closing of the exhaust valve 9, a large gas filling controller 15 for controlling the opening and closing of the control valve 5 on the large-caliber gas filling pipe 1031, and a small gas filling controller 18 for controlling the opening and closing of the control valve 5 on the small-caliber gas filling pipe 1032. In order to ensure the sealing performance of the pipeline, the exhaust valve 9 and the control valve 5 can be set to be ball valves.
Because the hydrogenation machine on-site calibration device applying the mass flow meter is generally placed on the ground when in use, and the plugging position of a muzzle is low, which is not beneficial to operation, as shown in fig. 3 to 4, the shell 19 is provided with the gas filling inclined plane 12 and the gas inlet inclined plane 17 in the embodiment;
the air inlet ends of the large-caliber air inlet pipeline 1021 and the small-caliber air inlet pipeline 1022 are positioned on the air inlet inclined plane 17, so that the filling pipe of the gas filling machine can be inserted into the large-caliber air inlet pipeline 1021 or/and the small-caliber air inlet pipeline 1022 at an acute angle with the horizontal plane;
the air outlet ends of the large-caliber air inlet pipeline 1031 and the small-caliber air inlet pipeline 1032 are located on the air-entrapping inclined plane 12, so that the air-entrapping gun can be inserted into the large-caliber air inlet pipeline 1021 or/and the small-caliber air inlet pipeline 1022 at an acute angle with the horizontal plane, and the air-entrapping gun and the filling pipeline can be conveniently plugged and unplugged.
Further, the inclination of the air-entrapping inclined plane 12 is greater than that of the air-admitting inclined plane 17; the inclination of the aerated inclined plane 12 is 40-50 degrees, and the inclination of the aerated inclined plane 17 is 15-25 degrees.
As shown in fig. 3, in order to facilitate power supply and data transmission for the electronic device in the housing 19, the housing 19 of this embodiment is provided with a power interface 13 and a data interface 14, the power interface 13 is used for externally connecting a power supply, and the data interface 14 is electrically connected with the hydrogen leakage detector 11, the pressure transmitter 2 and the mass flow meter 3 and is used for being connected with the data acquisition terminal 10 through a data line.
Since the hydrogenation detection device cannot be connected with the exhaust pipeline 8 of the hydrogenation station, the exhaust of the hydrogenation detection device can only be discharged to the air. However, hydrogen filling pressure is very high, and the exit velocity during the exhaust is also very high, if directly upwards discharges from equipment outlet, has two problems, and second, follows relevant research and shows, concentrates the single-point emission and can cause the hydrogen concentration gathering in the short time near discharge port, surpasss the safety alarm limit, triggers hydrogen concentration sensor warning, influences the witnessed inspections.
For this purpose, as shown in fig. 5, the exhaust port 6 is disposed at the bottom of the housing 19, and the exhaust port 6 has a symmetrical horizontal exhaust path 61 with opposite exhaust directions, so as to balance the reaction force of the air flow symmetrically when exhausting.
Specifically, two exhaust paths 61 which are distributed left and right can be arranged at the bottom of the shell 19, the exhaust port 6 is connected with the middle parts of the two exhaust paths 61, and the sectional areas of the two exhaust paths 61 are larger than that of the exhaust port 6, so that the sectional area of the exhaust pipeline 8 is increased, the outlet flow rate during exhaust is reduced, airflow impact and local hydrogen enrichment are reduced, and the exhaust port 6 at the bottom cannot injure people. Because the exhaust directions of the two exhaust paths 61 are opposite, the airflow reaction force is symmetrical to the platform during exhaust, so that the equipment cannot move, and the equipment inspection precision is not influenced.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides an use hydrogenation machine on-spot calibrating installation of mass flow meter which characterized in that includes:
the gas filling pipe group comprises a gas inlet pipeline, a flow pipeline and a gas filling pipeline in sequence along the gas flow direction;
the flow pipeline is provided with a mass flow meter, and the mass flow meter comprises an upstream interface flow channel, a flow dividing flow channel, a sensor measuring inner flow channel, a confluence flow channel and a sensor downstream interface flow channel which are sequentially communicated;
the upstream interface flow passage and the downstream interface flow passage are communicated with the flow passage;
the ratio of the flow area of the upstream interface flow channel to the flow area of the shunting flow channel is equal to the ratio of the sum of the flow areas of the inner flow channels measured by the sensor to the flow area of the converging flow channel, so that the temperature rise of the shunting flow channel is consistent with the temperature rise of the converging flow channel when gas flows through the mass flow meter.
2. The apparatus of claim 1, wherein the sensor measurement inner flow paths are arranged in two parallel groups, the inner diameter of the branch flow path is the same as the inner diameter of the confluence flow path, and the inner diameter of the upstream interface flow path is twice as large as the inner diameter of the sensor measurement inner flow path.
3. The hydrogenation unit on-site calibrating device applying the mass flow meter according to claim 2, wherein a pressure transmitter is further arranged on the flow pipeline, and the pressure transmitter and the mass flow meter are sequentially arranged along the flow direction of the gas;
the mass flow meter and the pressure transmitter are electrically connected with the data acquisition terminal and transmit gas flow data and pressure data in the flow pipeline to the data acquisition terminal.
4. The on-site calibrating device for the hydrogenation unit, which uses a mass flow meter, according to any one of claims 1 to 3, further comprising an exhaust pipeline connected to the flow pipeline in parallel with the gas supply pipeline, wherein the exhaust pipeline is provided with an exhaust valve, and the exhaust pipeline is connected with a return air port and a discharge port in parallel; the gas return port is used for collecting gas released when the filling vehicle is disassembled from the filling pipe;
and the exhaust port is used for discharging the gas in the gas filling pipe group and the gas collected by the gas return port after gas filling is finished.
5. The hydrogenation unit on-site verification device applying the mass flow meter according to claim 3, further comprising a hydrogen leakage detector electrically connected with the data acquisition terminal for acquiring a hydrogen leakage detection signal.
6. The hydromill field calibration device using a mass flow meter according to claim 4, wherein the gas inlet line comprises a large-caliber gas inlet line and a small-caliber gas inlet line connected in parallel to the first end of the flow line;
the gas adding pipeline comprises a large-caliber gas adding pipeline and a small-caliber gas adding pipeline which are connected to the second end of the flowing pipeline in parallel;
and the large-caliber gas adding pipeline and the small-caliber gas adding pipeline are both provided with a check valve and a control valve.
7. The hydrogenation unit on-site calibrating device applying the mass flow meter as claimed in claim 6, further comprising a shell, wherein the gas filling pipe group is arranged in the shell;
the air inlet ends of the large-caliber air inlet pipeline and the small-caliber air inlet pipeline extend out of the shell;
the air outlet ends of the large-caliber air adding pipeline and the small-caliber air adding pipeline extend out of the shell;
the exhaust end of the exhaust port extends out of the housing.
8. The on-site calibrating device for the hydrogenation unit with the mass flow meter as claimed in claim 7, wherein an exhaust controller for controlling the opening and closing of the exhaust valve is further arranged on the casing, and
a large gas adding controller for controlling the control valve on the large-caliber gas adding pipeline to be opened and closed, and
and the small gas adding controller is used for controlling the opening and closing of the control valve on the small-caliber gas adding pipeline.
9. The hydrogenation unit on-site calibrating device applying the mass flow meter according to claim 7, wherein an air-entrapping inclined surface and an air-inlet inclined surface are arranged on the shell;
the air inlet ends of the large-caliber air inlet pipeline and the small-caliber air inlet pipeline are positioned on the air inlet inclined plane, so that the filling pipe of the gas filling machine can be inserted into the large-caliber air inlet pipeline or/and the small-caliber air inlet pipeline at an acute angle with the horizontal plane;
the air outlet ends of the large-caliber air inlet pipeline and the small-caliber air inlet pipeline are positioned on the air-entrapping inclined plane, so that the air-entrapping gun can be inserted into the large-caliber air inlet pipeline or/and the small-caliber air inlet pipeline at an acute angle with the horizontal plane.
10. The apparatus of claim 9, wherein the exhaust port is located at the bottom of the housing, and the exhaust port has symmetrical and opposite horizontal exhaust paths to balance the gas flow reaction forces during exhaust.
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Effective date of registration: 20230707 Address after: No. 246, R&D Exhibition Center, Harbin Institute of Technology Robot Industrial Park, No. 55, Checheng East Second Road, Chengdu Economic and Technological Development Zone (Longquanyi District), 610000, Sichuan Patentee after: Sichuan Jiutian Traffic Technology Co.,Ltd. Address before: 610000 No. 07, floor 3, No. 200, Huaguan Road, Longtan Industrial Park, Section 2, East Third Ring Road, Chenghua District, Chengdu, Sichuan Patentee before: SICHUAN ZHONGCE FLOW MEASUREMENT TECHNOLOGY Co.,Ltd. |