CN113310540A - Multifunctional gas metering system based on electromagnetic induction technology - Google Patents
Multifunctional gas metering system based on electromagnetic induction technology Download PDFInfo
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- CN113310540A CN113310540A CN202110676022.XA CN202110676022A CN113310540A CN 113310540 A CN113310540 A CN 113310540A CN 202110676022 A CN202110676022 A CN 202110676022A CN 113310540 A CN113310540 A CN 113310540A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/001—Means for regulating or setting the meter for a predetermined quantity
- G01F15/002—Means for regulating or setting the meter for a predetermined quantity for gases
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/06—Indicating or recording devices
- G01F15/061—Indicating or recording devices for remote indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/14—Casings, e.g. of special material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0014—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation from gases, flames
- G01J5/0018—Flames, plasma or welding
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/12—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using thermoelectric elements, e.g. thermocouples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/0047—Specially adapted to detect a particular component for organic compounds
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Abstract
The invention discloses a multifunctional gas metering system based on an electromagnetic induction technology, which comprises a gas meter, a flame detection device and a gas electromagnetic valve, wherein the lower end of the gas electromagnetic valve is connected with the gas meter; the flame detection device is provided with a control box, a gooseneck, a stud and an adjusting threaded sleeve, wherein the control box is fixedly connected with the side wall of the gas electromagnetic valve; the stud is sleeved with an adjusting threaded sleeve; the flame detection sensor is connected with the gas electromagnetic valve through a control circuit. According to the invention, the flame signal when the kitchen catches fire is detected by the flame detection sensor to control the on-off of the gas electromagnetic valve, so that the detection distance is longer; the correct second password must be input to control the gas electromagnetic valve to be opened.
Description
Technical Field
The invention relates to the technical field of gas meters, in particular to a multifunctional gas metering system based on an electromagnetic induction technology.
Background
Application No.: 202010838583.0, application publication No. CN 112033488 a, applicant: mountain city gas equipment ltd, Chongqing, patent name: a natural gas meter with a composite adjusting function and a control method thereof; [0030] the shell is provided with an air inlet nozzle and an air outlet nozzle, the film driving mechanism is connected with the air inlet nozzle, the air outlet nozzle is provided with an electromagnetic valve, the electromagnetic valve is connected with a microprocessor, when P1 is less than P2, P2 is the minimum pressure threshold value of natural gas, the electromagnetic valve is controlled to be closed, the microprocessor is also connected with a buzzer, and the microprocessor controls the buzzer to send out an alarm signal;
the second temperature sensor and the methane sensor are arranged on the outer wall of the shell and used for detecting the temperature of the external environment, the methane sensor is used for detecting the methane concentration of the external environment, and the second temperature sensor and the methane sensor are connected with the microprocessor; the microprocessor also controls the switch of the electromagnetic valve according to the signals of the second temperature sensor and the methane sensor, and the microprocessor is connected with a reset button. The methane sensor can adopt an MP-4 combustible gas methane sensor.
Through the structure, the second temperature sensor is used for detecting the temperature of the external environment, when the microprocessor judges that the environment temperature is greater than T3, for example, 65 degrees or 70 degrees, the control electromagnetic valve is closed, the microprocessor is also connected with a buzzer, and the microprocessor controls the buzzer to send out an alarm signal.
The effect that the structure set up is _, when the kitchen catches fire, the fire is manly extended to the second temperature sensor, when making the second temperature sensor detect temperature and be greater than T3, the control solenoid valve closes.
And when a reset button is pressed, the electromagnetic valve is reset and opened.
The methane sensor is used for detecting the methane concentration of the external environment, when the natural gas pipe leaks gas in a kitchen and the concentration rises to influence the personal safety, the control electromagnetic valve is closed, the microprocessor is further connected with a buzzer, and the microprocessor controls the buzzer to send out an alarm signal.
Among the prior art, the gas table sets up in the user room usually, if the user arrests the gas fee, the administrator is inconvenient to carry out the disconnected confession natural gas to the user usually, and some patents can only use the natural gas through the mode that the user prestores the expense, but its gas table structure is comparatively complicated.
Therefore, the prior art has the defects that the temperature sensor is used for detecting kitchen fire, when the fire is extended to the temperature sensor, the buzzer is controlled to send out an alarm signal, and when the temperature sensor is far away from the flame, the sensitivity of the temperature sensor is low; the gas meter is usually arranged in a user room, and if a user arrests the gas fee, an administrator usually inconveniently supplies natural gas to the user.
The related documents are: grant publication No. CN 201681461U, application No. 201020055243.2, (73) patentee Chongqing Enkanka electronics Limited, utility model name: a wireless flame detector.
Disclosure of Invention
In view of at least one defect of the prior art, the invention aims to provide a multifunctional gas metering system based on an electromagnetic induction technology, which controls the on-off of a gas electromagnetic valve by detecting a flame signal when a kitchen is on fire through a flame detection sensor, and has the advantages of longer detection distance and higher sensitivity; the correct second password must be input to control the gas electromagnetic valve to be opened and use the natural gas.
In order to achieve the purpose, the invention adopts the following technical scheme: the multifunctional gas metering system based on the electromagnetic induction technology comprises a gas meter and is characterized by also comprising a flame detection device and a gas electromagnetic valve, wherein the lower end of the gas electromagnetic valve is provided with an internal thread interface which is matched with a gas inlet nozzle 11 of the gas meter, and the upper end of the gas electromagnetic valve is provided with an external thread interface;
the flame detection device is provided with a control box, a gooseneck, a stud and an adjusting thread sleeve, wherein the control box is fixedly connected with the side wall of the gas electromagnetic valve;
the flame detection sensor is connected with a control circuit through a lead which passes through the lead through hole, and the stud is sleeved with an adjusting threaded sleeve;
the flame detection sensor is connected with the gas electromagnetic valve through a control circuit, and the control circuit controls the switch of the gas electromagnetic valve according to the signal of the flame detection sensor;
the second microprocessor is also connected with a clock module and a keyboard, a first monthly password library is prestored in the second microprocessor, a second monthly password input by a user is also acquired by the second microprocessor through the keyboard, and the second microprocessor controls the on-off of the gas electromagnetic valve according to the second monthly password input by the user;
the keyboard is embedded in the outer wall of the control box.
And if the second february password is consistent with the corresponding first monthly password in the first monthly password library, controlling the gas electromagnetic valve to be opened, and if the second february password is inconsistent with the first monthly password or the second february password is not input, controlling the gas electromagnetic valve to be closed.
The flame detection sensor is used for detecting a flame signal when a kitchen fire is detected and sending the flame signal to the control circuit, and the control circuit controls the on-off of the gas electromagnetic valve according to the flame detection sensor.
The flame detection sensor adopts a PYD-1220A type pyroelectric infrared detector and can detect flame information within a visual angle range. Compared with the temperature sensor in the prior art, the temperature sensor has the advantages of long detection distance and high sensitivity. The flame detection sensor adopts an infrared flame detection sensor which is used for collecting an infrared signal with the wavelength of 4.1-4.9 mu m emitted by flame.
The second microprocessor is pre-stored with a first monthly password library, and the first monthly password library is provided with a plurality of groups of first monthly passwords, such as a password 124578 corresponding to 2 months in 2021, a password 4578 corresponding to 3 months in 2021, a password 671378 corresponding to 4 months in 2021, and a password … …. The second microprocessor is connected with a clock module to acquire time, such as 2 months in 2021, each month, a user must input a second february password through a keyboard, if the second february password is '124578' and is consistent with a corresponding first monthly password in the first monthly password library, the gas solenoid valve is controlled to be opened, and if the second february password is inconsistent with the first monthly password, such as '123456' or the second february password is not input, the gas solenoid valve is controlled to be closed. After the user pays the monthly fee, the administrator can obtain the correct second February password.
The control circuit comprises a signal amplification circuit, a signal processing circuit, a second microprocessor, a first switching triode and a relay J1;
the flame detection sensor is used for detecting that the flame signal transmits for signal amplification circuit, and signal amplification circuit transmits the flame signal after enlarging for signal processing circuit, and signal processing circuit links to each other with second microprocessor, and second microprocessor switches on and off through first switch triode control relay J1's coil, and the normally open switch of relay J1 controls the switch of gas solenoid valve.
The control circuit is connected with a buzzer and controls the switch of the buzzer according to the flame detection sensor; the buzzer is embedded in the outer wall of the control box.
Still include the spray pipe, the spray pipe lower extreme is connected with the shower nozzle, the spray pipe is provided with the water spray solenoid valve, and control circuit connects the water spray solenoid valve, and control circuit controls the switch of water spray solenoid valve according to the signal control of flame detection sensor.
The control circuit is connected with a reset button; the reset button is embedded in the outer wall of the control box.
The upper end of the gas electromagnetic valve is connected with a manual ball valve through an external thread interface.
The multifunctional gas metering system based on the electromagnetic induction technology has the advantages that the flame signal when the flame detection sensor detects kitchen fire is used for controlling the on-off of the gas electromagnetic valve, the detection distance is long, and the sensitivity is high; the correct second password must be input to control the gas electromagnetic valve to be opened and use the natural gas.
Drawings
FIG. 1 is a circuit block diagram of a control circuit;
FIG. 2 is a circuit diagram of a flame detection sensor, a signal amplification circuit, and a signal processing circuit;
FIG. 3 is a circuit diagram of a first microprocessor;
FIG. 4 is a block diagram of a gas meter;
FIG. 5 is a partial cross-sectional view of the housing;
FIG. 6 is a block diagram of a combination of a pressure sensing device, a first temperature sensor and a Hall sensor;
FIG. 7 is a second construction of the magnetic pressure floatation device;
FIG. 8 is a third structural view of the magnetic pressure floating device;
FIG. 9 is a circuit block diagram of a first microprocessor;
FIG. 10 is a circuit block diagram of a first microprocessor;
FIG. 11 is a circuit block diagram of the single chip microcomputer;
FIG. 12 is a circuit diagram of an immunity circuit;
fig. 13 is a flowchart of a control method of the gas meter;
fig. 14 is a circuit diagram of a clock module.
Fig. 15 is a structural view of the supercharging device.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
As shown in fig. 1 to 15, the multifunctional gas metering system based on the electromagnetic induction technology includes a gas meter, a flame detection device 6 and a gas electromagnetic valve 7, wherein the flame detection device 6 is provided with a flame detection sensor 61 and a control circuit, the flame detection sensor 61 is connected with the gas electromagnetic valve 7 through the control circuit, and the control circuit controls the gas electromagnetic valve 7 to be switched on and off according to a signal of the flame detection sensor 61.
The second microprocessor 64 is also connected with a clock module and a keyboard, a first monthly password bank is prestored in the second microprocessor 64, the second microprocessor 64 also acquires a second monthly password input by a user through the keyboard, if the second monthly password is consistent with the corresponding first monthly password in the first monthly password bank, the gas electromagnetic valve 7 is controlled to be opened, and if the second monthly password is inconsistent with the first monthly password or the second monthly password is not input, the gas electromagnetic valve 7 is controlled to be closed;
the keyboard is embedded in the outer wall of the control box 68.
The flame detection sensor 61 is used for detecting a flame signal when detecting a kitchen fire and sending the flame signal to the control circuit, and the control circuit controls the on-off of the gas electromagnetic valve 7 according to the flame detection sensor 61.
The flame detection sensor 61 adopts a PYD-1220A type pyroelectric infrared detector, and can detect flame information within the visual angle range. Compared with the temperature sensor in the prior art, the temperature sensor has the advantages of long detection distance and high sensitivity. The flame detection sensor 61 adopts an infrared flame detection sensor which is used for collecting an infrared signal with the wavelength of 4.1-4.9 mu m emitted by flame.
The kitchen fire is usually started from above the gas range, wherein the flame detection sensor 61 can be directed to a position above the kitchen gas range by more than 50cm, and the distance can be adjusted by itself, and when the kitchen fire is on, the flame can move upwards from the gas range. When the gas stove is normally used, the flame of the gas stove cannot jump to the position above 50cm above the gas stove.
One or more flame detection sensors 61 may be provided.
The second microprocessor 64 is pre-stored with a first monthly password library, which is provided with a plurality of sets of first monthly passwords, such as a password 124578 corresponding to 2 months in 2021, a password 4578 corresponding to 3 months in 2021, a password 671378 corresponding to 4 months in 2021, and a password … …. The second microprocessor 64 is connected with a clock module to acquire time, such as 2 months in 2021, each month, a user must input a second month password through a keyboard, if the second month password is '124578' and is consistent with a corresponding first month password in the first month password library, the gas solenoid valve 7 is controlled to be opened, and if the second month password is not consistent with the first month password, such as '123456' or the second month password is not input, the gas solenoid valve 7 is controlled to be closed. After the user finishes monthly fee payment, the administrator can obtain a correct second February password; the administrator's computer has the correct second Februte force password stored thereon.
By adopting the device, the gas meter can be controlled to be switched on and off only by additionally arranging the device on the gas inlet nozzle of the existing gas meter.
The control circuit comprises a signal amplifying circuit 62, a signal processing circuit 63, a second microprocessor 64, a first switching triode and a relay J1;
the flame detection sensor 61 is used for detecting flame signals and transmitting the flame signals to the signal amplification circuit 62, the signal amplification circuit 62 transmits the amplified flame signals to the signal processing circuit 63, the signal processing circuit 63 is connected with the second microprocessor 64, the second microprocessor 64 controls the on-off of a coil of the relay J1 through the first switch triode, and the normally open switch of the relay J1 controls the on-off of the gas electromagnetic valve 7.
The control circuit is connected with a buzzer, and the control circuit controls the switch of the buzzer according to the flame detection sensor 61.
The buzzer is embedded in the outer wall of the control box 68.
The flame detection sensor 61 is used for sensing flame information at a position above a gas stove by more than 50cm, the signal output end of the flame detection sensor 61 outputs the flame information to the signal amplification circuit 62, the flame information is amplified and filtered by the signal amplification circuit 62 and then is transmitted to the signal processing circuit 63, the signal processing circuit 63 compares the flame information transmitted by the signal amplification circuit 62 and judges the strength of the flame signal, if the strength of the flame signal exceeds an alarm threshold value, the signal processing circuit 63 triggers and wakes up the second microprocessor 64, the second microprocessor 224 controls the coil of the relay J1 to be electrified through the first switch triode, the normally closed switch of the relay J1 is disconnected, the gas electromagnetic valve 7 is disconnected, the gas pipe connected with the gas stove is disconnected with natural gas, and the second microprocessor 224 also controls the buzzer to be sounded.
The gas solenoid valve 7 may be a normally closed type solenoid valve.
Preferably, a first delay module is arranged in the second microprocessor 224, the delay time of the first delay module can be set to 10 seconds to 1 minute, and the gas electromagnetic valve 7 is controlled to be switched off and the buzzer buzzes to avoid short-time signal interference only when the flame signal detected by the flame detection sensor 61 lasts for 10 seconds to 1 minute.
Preferably, the control circuit is connected with a methane sensor 65, and the control circuit also controls the opening and closing of the buzzer and the gas solenoid valve 7 according to the signal of the methane sensor 65. The methane sensor can adopt an MP-4 combustible gas methane sensor.
The methane sensor 65 is embedded in the outer wall of the control box 68.
After boiled water is boiled, the boiled water flows out of the pot, the gas stove is turned off, the methane sensor 65 detects the methane concentration in the kitchen air and transmits the methane concentration to the second microprocessor 224, and when the second microprocessor 224 judges that the methane concentration is greater than a set concentration threshold value, the second microprocessor 224 controls the gas electromagnetic valve 7 to be disconnected, and the buzzer buzzes. Conversely, when the methane concentration in the kitchen air is too low, the second microprocessor 224 does not output a corresponding control signal.
The control circuit is connected with a water spraying electromagnetic valve 8, and the control circuit controls the on-off of the water spraying electromagnetic valve 8 according to the signal of the flame detection sensor 61.
The second microprocessor 224 is connected with a second switch triode, the second switch triode is connected with a relay J2, the second switch triode controls the on-off of a coil of the relay J2, and a normally open switch of the relay J2 controls the on-off of the water spray electromagnetic valve 8.
Be provided with second time delay module in the second microprocessor 224, when the flame signal that flame detection sensor 61 detected exceeded 2 minutes, specific time can oneself set for, and second microprocessor 224 is through the coil circular telegram of second switch triode control relay J2, and relay J2's normally open switch is closed, and control water spray solenoid valve 8 circular telegram, the fire extinguishing of spraying water. On the contrary, the second microprocessor 224 does not output a corresponding control signal, and the coil of the relay J2 is controlled to be powered off by the second switching triode, the normally open switch of the relay J2 is turned off, and the water spraying solenoid valve 8 is controlled to be powered off.
Of course, in the control circuit, the signal control is not limited to the second microprocessor 224, and the integrated operational amplifier may be used to replace the second microprocessor 224, and the delay circuit, such as a delay relay, may be used to replace the first delay module and the second delay module to achieve the same effect, which is not shown in the figure.
The control circuit is connected with a reset button. The reset button is embedded in the outer wall of the control box 68.
The control circuit is connected with a reset button, the reset button is connected with the second microprocessor 224, when a user presses the reset button, the gas electromagnetic valve 7 is electrified and reset, the gas electromagnetic valve 7 is switched on, and meanwhile, the buzzer is powered off and stops buzzing. The reset button is used only to turn on the gas solenoid valve 7 closed by the signal of the flame detection sensor 61.
In the case where the user does not input the correct second february password, the gas solenoid valve 7 cannot be opened even if the reset button is pressed.
The flame detection sensor 61 may also be an ultraviolet flame detection sensor.
A safe electromagnetic control device is characterized by comprising a flame detection device 6 and a gas electromagnetic valve 7, wherein the lower end of the gas electromagnetic valve 7 is provided with an internal thread interface which is matched with an external thread of a gas inlet nozzle 11 of a gas meter, and the upper end of the gas electromagnetic valve 7 is provided with an external thread interface;
the upper end of the gas electromagnetic valve 7 is connected with a manual ball valve through an external thread interface;
the manual ball valve has the same structure as a manual valve in the prior art, is omitted in the figure and is used for manually controlling the gas meter to be switched on or off;
the flame detection device 6 is provided with a control box 68, a gooseneck 661, a stud 66 and an adjusting threaded sleeve 67, the control box 68 is fixedly connected with the side wall of the gas electromagnetic valve 7, the flame detection device 6 is further provided with a flame detection sensor 61 and a control circuit, the shell wall of the control box 68 is fixedly connected with the gooseneck 661, one end of the gooseneck 661 is connected with the shell wall of the control box 68, the other end of the gooseneck 661 is fixedly connected with one end face of the stud 66, the axis of the stud 66 and the gooseneck 661 are provided with a lead through hole in a penetrating manner, the other end face of the stud 66 is provided with the flame detection sensor 61, and the control circuit is arranged in the control box 68;
the flame detection sensor 61 is connected with a control circuit through a lead passing through a lead through hole, and the stud 66 is sleeved with an adjusting threaded sleeve 67;
the flame detection sensor 61 is connected with the gas electromagnetic valve 7 through a control circuit, and the control circuit controls the gas electromagnetic valve 7 to be switched on and off according to signals of the flame detection sensor 61.
The gas electromagnetic valve 7 is installed on the gas inlet nozzle 11 of the gas meter through an internal thread interface at the lower end of the gas electromagnetic valve.
Wherein, the top in kitchen is provided with spray pipe 81, the water pipe is connected to spray pipe 81 upper end, and its lower extreme is connected with shower nozzle 82, spray pipe 81 is provided with water spray solenoid valve 8, and control circuit connects water spray solenoid valve 8 through connecting wire, and control circuit controls the switch of water spray solenoid valve 8 according to the signal control of flame detection sensor 61.
Adjust threaded sleeve 67 both ends opening, adjust threaded sleeve 67 and can screw in or screw out on double-screw bolt 66, adjust flame detection sensor 61 to the open-ended distance of adjusting threaded sleeve 67 to can adjust flame detection sensor 61 observation scope, thereby make flame detection sensor 61 only observe the scope more than 50cm in kitchen gas-cooker top, when guaranteeing the normal use gas-cooker, can not trigger flame detection sensor 61.
The gooseneck 661 is twisted by hand to adjust the orientation of the flame detection sensor 61, so as to adjust the observation range of the flame detection sensor 61, so that the flame detection sensor 61 only observes the range above 50cm above the kitchen gas stove, and the flame detection sensor 61 is not triggered when the gas stove is normally used.
A battery is arranged in the control box 68, and the battery supplies power to the control circuit; or connected with an external power supply to supply power for the control circuit.
As shown in fig. 4 to 12, a gas meter is an electromagnetic induction gas meter, is provided with the safe electromagnetic control device, and includes a housing 1, a film driving mechanism 2 and a rotary valve 3 are arranged in the housing 1, the film driving mechanism 2 drives the rotary valve 3 to rotate, and the outer wall of the housing 1 is provided with a transparent metering window 4; the compound adjustment metering device 5 is further included, the compound adjustment metering device 5 includes a calculation display device 51, and the calculation display device 51 includes a first microprocessor 511 and a digital display 512; the first microprocessor 511 is connected with a Hall sensor 52, a pressure detection device 53 and a temperature detection sensor 54, a magnet block 31 is fixedly arranged on the circumference of the rotary valve 3, the rotary valve 3 rotates to apply signals to the Hall sensor 52 through the magnet block 31, the Hall sensor 52 is used for measuring the number of rotation turns of the rotary valve 3 and sending the rotation turns to the first microprocessor 511, and the first microprocessor 511 converts the rotation turns into the volume consumption V of the natural gas1The pressure detection device 53 and the temperature detection sensor 54 are respectively disposed on the housing 1 for detecting the actual pressure P of the natural gas in the housing 11And the actual temperature T1The first microprocessor 511 obtains the volume dose V1And natural gas actual pressure P1And the actual temperature T1Converted into standard natural gas pressure P0And a standard temperature T0Volume dose V of2The first microprocessor 511 calculates the total volume consumption and displays the total volume consumption through the digital display 512.
The membrane drive mechanism 2 is also referred to as a movement.
The magnet blocks 31 may be 1-2 blocks, and are directly or indirectly installed on the circumference of the rotary valve 3. The sensor accommodation groove 13 has a thin wall, and the hall sensor 52 can directly receive the signal of the magnet block 31 without opening a hole.
The hall sensor 52 is a magnetic field sensor made according to the hall effect. The hall effect is one of the magnetoelectric effects, which was discovered by hall (a.h. hall, 1855-. It was later discovered that semiconductors, conductive fluids, etc. also have this effect, and that semiconductors have a much stronger hall effect than metals, and various hall elements are made using this phenomenon.
If there is a Hall semiconductor chip in the magnetic field, a constant current I is passed through the chip from one of the directions. The current of I electrons is deflected to one side by the lorentz force as it passes through the hall semiconductor, causing the plate to develop a potential difference in the other direction, the so-called hall voltage.
The Hall voltage changes along with the change of the magnetic field intensity, the stronger the magnetic field, the higher the voltage, the weaker the magnetic field, the lower the voltage, the small Hall voltage value, usually only a few millivolts, but the voltage can be amplified by an amplifier in an integrated circuit to be enough to output a stronger signal.
The total volume consumption is equal to the original natural gas volume consumption plus the volume consumption V2Meanwhile, the first microprocessor 511 stores the total volume consumption, which is convenient for the next cumulative calculation of the total volume consumption of the natural gas.
The effect that above-mentioned structure set up does: the film driving mechanism 2 drives the rotary valve 3 to rotate, the magnet block 31 is close to the Hall sensor 52 once every time the rotary valve 3 rotates for a circle, and the Hall sensor 52 outputs a volume dosage signal once;
the first microprocessor 511 directly obtains the rotation signal of the rotary valve 3 through the hall sensor 52; the complicated transmission mechanism and gear speed regulating mechanism of the existing natural gas meter are omitted, so that the volume signal acquisition structure of the natural gas is simpler. In addition, a complicated transmission mechanism and a gear speed regulating mechanism of the existing natural gas meter are required to be provided with holes on the shell in order to obtain a rotation signal of the rotary valve 3 and transmit the rotation signal to the counting code disc.
The first microprocessor 511 obtains the volume consumption V of the natural gas through the hall sensor 521The actual pressure P of the natural gas is obtained by the pressure detection device 531E.g. 3000PA, by first temperature sensingThe device 53 obtains the actual temperature T of the natural gas1E.g. -30 degrees, and then converted to standard natural gas pressure P0E.g. 2000PA and standard natural gas temperature T0E.g. volume dose V at 20 degrees2The first microprocessor 511 calculates the total volume consumption and displays the total volume consumption through the digital display 512. Therefore, the natural gas meter can adjust the metering data according to the actual pressure and the actual temperature of the natural gas, and the detection data of the natural gas meter is more accurate.
A transparent metering window 4 is arranged on the outer wall of the shell 1; the calculation display device 51 is disposed in the measurement window 4, so as to facilitate reading on the display 512.
The lateral wall integrated into one piece of casing 1 has recess 13, and the bottom of recess 13 extends to one side of the inner chamber of casing 1, and the bottom lower edge of recess 13 is close to the circumference of commentaries on classics valve 3, and the bottom upper edge of recess 13 keeps away from commentaries on classics valve 3, and hall sensor 52 sets up in the bottom of the inner chamber of recess 13 and is close to commentaries on classics valve 3.
The output lead of the hall sensor 52 protrudes out of the recess 13.
In the prior art, the hall sensor 52 is conventionally used by directly placing it in a container for detection and leading out an electric signal, and in another way, a rotation signal of the impeller is led out from the housing 1 through a gear mechanism, and both ways require a hole to be formed in the housing 1. The integrally formed groove 13 is adopted; the bottom of the groove 13 extends towards one side of the inner cavity of the shell 1 to be close to the rotary valve 3, so that the Hall sensor 52 can conveniently acquire signals of the magnet block 31, the hole is prevented from being formed in the shell 1, and the leakage of natural gas is reduced.
The pressure detection means 53 includes a magnetic pressure floating means 531 and a magnetic induction position detection means 532;
the magnetic pressure floating device 531 is fixed in the housing 1 and provided with a magnetic pressure float 5312 floating with the natural gas pressure in the housing 1; the magnetic pressure floating device 531 is close to the outer wall of one side of the groove 13 far away from the rotary valve 3, the magnetic induction position detection device 532 is fixed on the inner wall of one side of the inner cavity of the groove 13 far away from the rotary valve 3, the magnetic induction position detection device 532 is provided with a detection pipe 5321 for detecting the displacement of the magnetic pressure float 5312, and the magnetic induction position detection device 532The displacement signal of the magnetic pressure floater 5312 is converted into a corresponding electric signal and sent to the first microprocessor 511, and the first microprocessor 511 converts the electric signal into the actual natural gas pressure P1。
Through the structural arrangement, the magnetic pressure float 5312 converts the pressure of the natural gas in the shell 1 into a displacement signal, the magnetic induction position detection device 532 outside the shell 1 converts the displacement signal of the magnetic pressure float 5312 into a corresponding electric signal and sends the electric signal to the first microprocessor 511, and the first microprocessor 511 converts the electric signal into the actual pressure P1 of the natural gas. The shell 1 does not need to be provided with holes, so that natural gas leakage is reduced, and the gas-liquid separator is safer.
The magnetic pressure floating device 531, the detection tube 5321 and the hall sensor 52 are respectively positioned at the upper side and the lower side of the groove 13 and are separated from each other, so that mutual magnetic signal interference between the two is reduced.
The magnetic pressure floating device 531 comprises an air bag 5311 capable of expanding and contracting with pressure, the expansion and contraction direction of the air bag 5311 is consistent with the axial direction of the groove 13, and the air bag 5311 is filled with pressure P3One end of the air bag 5311 is fixed on the inner wall of the shell 1, the other end of the air bag 5311 is connected with a magnetic pressure float 5312, the magnetic pressure float 5312 is made of a magnet, an inner sleeve 5313 and an outer sleeve 5314 are arranged in the air bag 5311 along the expansion direction of the air bag 5311, one end of the outer sleeve 5314 is fixed on the inner wall of one end of the air bag 5311, the other end of the outer sleeve 5314 is open, one end of the inner sleeve 5313 is fixed on one end of the inner wall of the other end of the air bag 5311 and is fixedly connected with the magnetic pressure float 5312, the other end of the inner sleeve 5313 is inserted into the opening of the outer sleeve 5314, and the other end of the inner sleeve 5313 is also connected with the bottom of the outer sleeve 5314 through a return spring 5315;
the detection tube 5321 is close to the magnetic pressure float 5312 and is consistent with the moving direction of the magnetic pressure float 5312, at least two reed switches are arranged in the detection tube 5321 along the moving direction of the magnetic pressure float 5312, the reed switches are connected with a single chip microcomputer, and the single chip microcomputer converts signals of the reed switches into corresponding electric signals and sends the electric signals to the first microprocessor 511.
With the above arrangement, the air bag 5311 is inflated with a pressure of P3Of the pressure P3Can be set to a normal atmospheric pressure, when the natural gas pressure P outside the air bag 53111When the pressure changes, the pressure in the air bag 5311 changes, and the pressure P of the natural gas outside the air bag changes1When the pressure of the air in the air bag 5311 is increased, the air volume in the air bag 5311 is reduced, the pressure is increased, the inner sleeve 5313 slides towards the outer sleeve 5314, and the inner sleeve 5313 drives the magnetic pressure float 5312 to move towards the direction close to the outer sleeve 5314; outside natural gas pressure P1When the pressure becomes smaller, the volume of the gas in the air bag 5311 is increased, and the pressure becomes smaller; the inner sleeve 5313 slides outwards the outer sleeve 5314, and the inner sleeve 5313 drives the magnetic pressure float 5312 to move in a direction away from the outer sleeve 5314; pressure equilibrium is achieved.
When the magnetic pressure float 5312 floats, the reed switch in the detection tube 5321 is triggered, the signal is sent to the single chip microcomputer through the reed switches at different positions, the single chip microcomputer converts the signal of the reed switch into a corresponding electric signal and sends the corresponding electric signal to the first microprocessor 511, and the first microprocessor 511 converts the corresponding pressure signal into a corresponding pressure signal.
As shown in fig. 5, the magnetic pressure float 5312 and the magnet block 31 are both made of a C-shaped magnet, the opening of the magnet block 31 faces the hall sensor 52, and the magnetic line of force passes through the hall sensor 52 from one end of the C-shaped magnet to enter the other end, reducing the interference with the reed switch.
Similarly, the opening of the magnetic pressure float 5312 faces the reed switch, and the magnetic line of force passes through the reed switch from one end of the C-shaped magnet to enter the other end, thereby reducing the interference to the hall sensor 52.
A partition plate 521 made of magnetic conductive steel is arranged between the Hall sensor 52 and the detection tube 5321, so that mutual interference can be reduced.
As shown in fig. 12, the hall sensor 52 is provided with a voltage output terminal, which is connected to the first microprocessor 511 via an anti-interference circuit including an integrated operational amplifier comparator, and the hall sensor 52 is connected to the first microprocessor 511 via the integrated operational amplifier comparator, so that the interference of the magnetic pressure float 5312 on the hall sensor 52 can be reduced.
The first temperature sensor 54 is fixedly disposed at the bottom of the groove 13, and the groove 13 is filled with a heat insulating material 541.
The output lead of the first temperature sensor 54 is connected to the first microprocessor 511 through the groove 13.
The first temperature sensor 54 in the prior art is mostly disposed in the housing 1, and is led out from the opening of the housing 1 through a lead wire to connect the first microprocessor 511, the above structure requires opening the opening in the housing 1 and using a sealing ring, which is likely to cause natural gas leakage for a long time, and the first temperature sensor 54 is disposed in the housing 1, if the first temperature sensor is short-circuited, sparks are likely to be generated, which affects safety. If the heat exchanger is directly arranged on the outer wall of the shell 1, the heat exchanger is easily interfered by the temperature of the external environment.
Through the above structure, the first temperature sensor 54 is disposed at the bottom of the groove 13 and extends into the inner cavity of the housing 1, so as to facilitate detection of the actual temperature of the natural gas, and the heat insulating material 541 is adopted to isolate the natural gas from the external environment, thereby preventing the external environment temperature from interfering with the detection data of the first temperature sensor 54. And holes do not need to be formed in the shell 1, so that the natural gas leakage is reduced, and the safety is higher.
The shell 1 is provided with an air inlet nozzle 11 and an air outlet nozzle 12, and the film driving mechanism 2 is connected with the air inlet nozzle 11.
The film driving mechanism 2 is provided with an air inlet which is connected with the air inlet nozzle 11.
The calculation display device 51 is disposed in the measurement window 4.
As shown in fig. 4, the outer wall of the housing 1 is provided with a transparent metering window 4; facilitating reading on the display 512. The first microprocessor 511 is provided with a power supply 513.
Preferably, the outer wall of casing 1 still is provided with the shield that can open, the shield covers measurement window 4, can reduce the greasy dirt on 4 surfaces of measurement window, influences the meter reading person's reading.
As shown in fig. 6-8, the bladder 5311 may be made of thin-walled rubber; or made of thin-wall elastic steel and arranged into a flexible wave-shaped disc.
As shown in fig. 6-8, the air bag 5311 is provided with two end plates, one end of the air bag 5311 is fixed on the inner wall of the housing 1, and the other end of the air bag 5311 is far away from the inner wall of the housing 1; the shell 1 is stretched with a groove 13, and the direction of the groove 13 is consistent with the expansion direction of the air bag 5311.
As shown in fig. 7, the bladder 5311 is made of thin-walled rubber.
As shown in fig. 8, the air bag 5311 is provided with two end plates, one of which is connected to the inner wall of the housing 1, the other end plate is connected to the magnetic pressure float 5312, a sliding sleeve 5316 is fitted to the end plate, and the sliding sleeve 5316 is provided with air holes.
As shown in fig. 10, the first microprocessor 511 and the single chip microcomputer may adopt an STM8 single chip microcomputer.
The housing 1 may be made of aluminum alloy, stainless steel, or the like.
The pressure detection device 53 may also be mounted on the housing 1 using a PT124B-210 pressure sensor. The hall sensor 52 may be an HG-106C hall sensor.
The temperature detection sensor 54 may employ an AD590 temperature sensor.
As shown in fig. 13, a method for controlling a gas meter with a composite adjustment function includes the following steps:
step A: the first microprocessor 511 measures the number of turns of the rotary valve 3 through the hall sensor 52;
the first microprocessor 511 is spaced by a time t0Calculating the number of turns of rotation, interval time t0Preset in the first microprocessor 511;
and B: the first microprocessor 511 converts the number of turns of the rotary valve 3 into the volume consumption V of the natural gas1；
The volume of the natural gas generated by one rotation of the rotary valve 3 is determined by experiment and stored in the first microprocessor 511, and the volume dosage V is used1Equal to the rotary ring of the rotary valve 3The number is multiplied by the volume of the natural gas generated by one rotation of the rotary valve 3;
and C: the first microprocessor 511 obtains the actual pressure P of the natural gas detected by the pressure detecting device 531(ii) a The first microprocessor 511 then obtains the actual temperature T of the natural gas detected by the temperature detection sensor 541；
Step D: the first microprocessor 511 calculates the volume dose V using the following equation 12；
Step E: the first microprocessor 511 calculates the total volume consumption and displays the total volume consumption through the digital display 512.
The total volume consumption is equal to the original natural gas volume consumption plus the volume consumption V2Meanwhile, the microprocessor 511 stores the total volume consumption, which is convenient for the next cumulative calculation of the total volume consumption of the natural gas.
The volume dose V can be calculated by adopting the formula 12The metering of the natural gas meter is more accurate.
The first microprocessor 511 acquires a rotating speed signal of the rotary valve 3 through the Hall sensor 52, determines a pressure fluctuation regulating coefficient lambda according to the rotating speed signal, and regulates P according to the pressure fluctuation regulating coefficient lambda1；
The volume dosage V is calculated by adopting the following formula 22；
Due to the structural relationship of the pressure detection device 53 and the influence of the movement of the film driving mechanism and the impeller of the meter core 2, the detection value of the pressure detection device 53 has a certain difference with the actual pressure, and the pressure P is adjusted by the pressure fluctuation adjustment coefficient lambda1And the pressure detection is more accurate. The pressure fluctuation adjustment coefficient lambda is adjusted according to the pressure such as 2000Pa, 2100Pa, 2200Pa, 2300Pa … …, at 10 revolutions, 20 revolutions, 30 revolutions, 40 revolutions … … by trialAnd (6) testing and determining.
The gas meter is characterized in that a gas outlet nozzle 12 of the gas meter is also connected with a supercharging device 14.
The pressure increasing device 14 is used for increasing the outlet pressure of the natural gas, so that occasions requiring high natural gas pressure or large natural gas firepower requirements are met.
The supercharging device 14 is provided with a cylindrical shell 141, one end of the shell 141 is provided with a first connecting nozzle 142, the first connecting nozzle 142 is connected with the gas outlet nozzle 12 of the gas meter, the other end of the shell 141 is provided with a second connecting nozzle 143, a support 144 is arranged in the shell 141, a rotating shaft 145 is rotatably arranged on the support 144, the rotating shaft 145 is coaxial with the shell 141, a first supercharging impeller 146 is fixedly sleeved on the rotating shaft 145, a brushless direct current motor 147 is fixedly arranged in the shell 141, a power supply box 148 is arranged on the outer wall of the shell 141, the power supply box 148 is connected with the brushless direct current motor 147 through a contact pin penetrating through the shell 141 to supply power to the power supply box, and the brushless direct current motor 147 drives the first supercharging impeller 146 to rotate.
In the supercharging apparatus 14, the brushless dc motor drives the first supercharging impeller 146 to rotate, and when the first supercharging impeller 146 rotates, the natural gas is sucked from the first connection nozzle 142 and is discharged from the second connection nozzle 143, so that the pressure of the natural gas discharged from the second connection nozzle 143 is increased.
The first booster impeller 146 is provided with a plurality of increasing vanes.
The cylindrical housing 141 is provided with a first cylindrical portion connected to the first connection nozzle 142 and a second cylindrical portion connected to the second connection nozzle 143. The second cylindrical portion is smaller than the first cylindrical portion.
The first booster impeller 146 is arranged on the first cylindrical part, the second cylindrical part is provided with the second booster impeller 149, and the first booster impeller 146 is larger than the second booster impeller 149; the second booster impeller 149 is also fixedly sleeved on the rotating shaft 145, and the pressure of the natural gas sprayed out of the second connecting nozzle 143 is effectively improved through two-stage boosting of the first booster impeller 146 and the second booster impeller 149.
The other parts of the housing 141 except the first connecting nozzle 142 and the second connecting nozzle 143 are sealed, and are isolated from the outside air when in use, the inside keeps positive pressure, the outside air cannot enter, electric sparks cannot be generated by adopting the brushless direct current motor 147, and the use is safer.
The support 144 is star-shaped or cross-shaped.
The pressurizing device 14 is not limited to be disposed on the gas outlet nozzle 12, for example, the gas inlet nozzle 11 of the gas meter may also be connected to the pressurizing device 14, in this case, the first connecting nozzle 142 of the pressurizing device 14 may be connected to the gas inlet pipe, and the second connecting nozzle 143 is connected to the gas inlet nozzle 11.
The power box 148 is also provided with a power switch.
Finally, it is noted that: the above-mentioned embodiments are only examples of the present invention, and it is a matter of course that those skilled in the art can make modifications and variations to the present invention, and it is considered that the present invention is protected by the modifications and variations if they are within the scope of the claims of the present invention and their equivalents.
Claims (10)
1. The multifunctional gas metering system based on the electromagnetic induction technology comprises a gas meter and is characterized by also comprising a flame detection device (6) and a gas electromagnetic valve (7), wherein an internal thread interface is arranged at the lower end of the gas electromagnetic valve (7), the internal thread interface is matched with a gas inlet nozzle 11 of the gas meter, and an external thread interface is arranged at the upper end of the gas electromagnetic valve (7);
the flame detection device (6) is provided with a control box (68), a gooseneck (661), a stud (66) and an adjusting threaded sleeve (67), the control box (68) is fixedly connected with the side wall of the gas electromagnetic valve (7), the flame detection device (6) is further provided with a flame detection sensor (61) and a control circuit, one end of the gooseneck (661) is connected with the shell wall of the control box (68), the other end of the gooseneck (661) is fixedly connected with one end face of the stud (66), the axis of the stud (66) and the gooseneck (661) are provided with a lead through hole in a penetrating manner, the other end face of the stud (66) is provided with the flame detection sensor (61), and the control circuit is arranged in the control box (68);
the flame detection sensor (61) is connected with a control circuit through a lead penetrating through the lead through hole, and the stud (66) is sleeved with an adjusting threaded sleeve (67);
the flame detection sensor (61) is connected with the gas electromagnetic valve (7) through a control circuit, and the control circuit controls the gas electromagnetic valve (7) to be switched on and off according to signals of the flame detection sensor (61);
the control circuit comprises a signal amplification circuit (62), a signal processing circuit (63), a second microprocessor (64), a first switching triode and a relay J1;
the flame detection sensor (61) is used for detecting a flame signal and transmitting the flame signal to the signal amplification circuit (62), the signal amplification circuit (62) transmits the amplified flame signal to the signal processing circuit (63), the signal processing circuit (63) is connected with the second microprocessor (64), the second microprocessor (64) controls the on-off of a coil of the relay J1 through the first switch triode, and the normally open switch of the relay J1 controls the on-off of the gas electromagnetic valve (7);
the second microprocessor (64) is also connected with a clock module and a keyboard, a first monthly password library is prestored in the second microprocessor (64), a second monthly password input by a user is also acquired by the second microprocessor (64) through the keyboard, and the second microprocessor (64) controls the on-off of the gas electromagnetic valve (7) according to the second monthly password input by the user;
the keyboard is embedded in the outer wall of the control box (68).
2. The multifunctional gas metering system based on the electromagnetic induction technology as claimed in claim 1, wherein: the control circuit is connected with a buzzer, and the control circuit controls the switch of the buzzer according to the flame detection sensor (61); the buzzer is embedded in the outer wall of the control box (68).
3. The multifunctional gas metering system based on the electromagnetic induction technology as claimed in claim 2, characterized in that: the control circuit is connected with a methane sensor (65), and the control circuit also controls the switch of the buzzer and the gas electromagnetic valve (7) according to the signal of the methane sensor (65); the methane sensor (65) is embedded in the outer wall of the control box (68).
4. The multifunctional gas metering system based on the electromagnetic induction technology as claimed in claim 1, wherein: still include spray pipe (81), spray pipe (81) lower extreme is connected with shower nozzle (82), spray pipe (81) are provided with water spray solenoid valve (8), and control circuit connects water spray solenoid valve (8), and control circuit controls the switch of water spray solenoid valve (8) according to the signal control of flame detection sensor (61).
5. The multifunctional gas metering system based on the electromagnetic induction technology as claimed in claim 1, wherein: the control circuit is connected with a reset button; the reset button is embedded in the outer wall of the control box (68).
6. The multifunctional gas metering system based on the electromagnetic induction technology as claimed in claim 1, wherein: the upper end of the gas electromagnetic valve (7) is connected with a manual ball valve through an external thread interface.
7. The multifunctional gas metering system based on the electromagnetic induction technology as claimed in claim 1, wherein: the gas meter is provided with a shell (1), a film driving mechanism (2) and a rotary valve (3) are arranged in the shell (1), the film driving mechanism (2) drives the rotary valve (3) to rotate, and a transparent metering window (4) is arranged on the outer wall of the shell (1); the device also comprises a composite adjusting metering device (5), wherein the composite adjusting metering device (5) comprises a calculation display device (51), and the calculation display device (51) comprises a first microprocessor (511) and a digital display (512); the first microprocessor (511) is connected with a Hall sensor (52), a pressure detection device (53) and a temperature detection sensor (54), a magnet block (31) is fixedly arranged on the circumference of the rotary valve (3), the rotary valve (3) rotates to apply signals to the Hall sensor (52) through the magnet block (31), the Hall sensor (52) is used for measuring the number of rotating circles of the rotary valve (3) and sending the number to the first microprocessor (511), and the first microprocessor (511) converts the number into the volume consumption V of natural gas1The pressure detection device (53) and the temperature detection sensor (54) are arranged on the shell (1) and are respectively used for detecting the actual pressure P of the natural gas in the shell (1)1And the actual temperature T1The first microprocessor (511) obtains the volume dose V1And natural gas actual pressure P1And the actual temperature T1To make itConverted into standard natural gas pressure P0And a standard temperature T0Volume dose V of2The first microprocessor (511) calculates the total volume consumption and displays the total volume consumption via the digital display (512).
8. The multifunctional gas metering system based on the electromagnetic induction technology as claimed in claim 7, wherein: the side wall of the shell (1) is integrally formed with a groove (13), the bottom of the groove (13) extends to one side of the inner cavity of the shell (1), the lower edge of the bottom of the groove (13) is close to the circumference of the rotary valve (3), the upper edge of the bottom of the groove (13) is far away from the rotary valve (3), and the Hall sensor (52) is arranged at the bottom of the inner cavity of the groove (13) and close to the rotary valve (3);
the pressure detection means (53) comprises a magnetic pressure floating means (531) and a magnetic induction position detection means (532);
the magnetic pressure floating device (531) is fixed in the shell (1) and is provided with a magnetic pressure floater (5312) floating along with the natural gas pressure in the shell (1); the magnetic pressure floating device (531) is close to the outer wall of one side of the groove (13) far away from the rotary valve (3), the magnetic induction position detection device (532) is fixed on the inner wall of one side of the inner cavity of the groove (13) far away from the rotary valve (3), the magnetic induction position detection device (532) is provided with a detection pipe (5321) for detecting the displacement of the magnetic pressure floater (5312), the magnetic induction position detection device (532) converts the displacement signal of the magnetic pressure floater (5312) into a corresponding electric signal and sends the electric signal to the first microprocessor (511), and the first microprocessor (511) converts the electric signal into the actual pressure P of natural gas1；
The first temperature sensor (54) is fixedly arranged at the bottom of the groove (13).
9. The multifunctional gas metering system based on the electromagnetic induction technology as claimed in claim 1, wherein: and the gas outlet nozzle (12) of the gas meter is also connected with a supercharging device (14).
10. The multifunctional gas metering system based on the electromagnetic induction technology as claimed in claim 9, wherein: the supercharging device (14) is provided with a cylindrical shell (141), one end of the shell (141) is provided with a first connecting nozzle (142), the first connecting nozzle (142) is connected with the gas outlet nozzle (12) of the gas meter, the other end of the shell (141) is provided with a second connecting nozzle (143), a bracket (144) is arranged in the shell (141), a rotating shaft (145) is rotatably arranged on the bracket (144), the rotating shaft (145) is coaxial with the shell (141), a first supercharging impeller (146) is fixedly sleeved on the rotating shaft (145), a brushless direct current motor (147) is fixedly arranged in the shell (141), a power supply box (148) is arranged on the outer wall of the shell (141), the power supply box (148) is connected with the brushless direct current motor (147) through a contact pin penetrating through the shell (141) to supply power to the brushless direct current motor, the brushless DC motor (147) drives the first booster impeller (146) to rotate.
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