CN219104090U - Micro-flow sampling gas meter - Google Patents
Micro-flow sampling gas meter Download PDFInfo
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- CN219104090U CN219104090U CN202223552898.2U CN202223552898U CN219104090U CN 219104090 U CN219104090 U CN 219104090U CN 202223552898 U CN202223552898 U CN 202223552898U CN 219104090 U CN219104090 U CN 219104090U
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Abstract
The utility model relates to a micro-flow sampling gas meter. The intelligent flow metering device is characterized in that the sampling gear set is arranged below the main control circuit board and comprises a second duplex gear, a sampling wheel, a second transition gear and a micro-sampling wheel, the first transition gear rotates to the sampling wheel through the duplex gear, the sampling wheel is driven to the micro-sampling wheel through the second transition gear, sampling magnetic steel is arranged on the sampling wheel and the micro-sampling wheel, a sensor is arranged on a rotating track line of the main control circuit board relative to the sampling wheel and the micro-sampling wheel, and when the sampling wheel and the micro-sampling wheel rotate, the sensor can sense magnetic field signals of the magnetic steel approaching and leaving, so that intelligent flow metering of the gas meter is realized. The utility model utilizes the sampling gear set to increase the rotating speed of the sampling wheel, and the signal is collected by the collector integrated on the main control circuit board, so that wires and additional circuit boards are not needed, and the cost is reduced; the gas meter can also rapidly achieve information sampling when in use of micro flow, is convenient and rapid, and improves production efficiency.
Description
Technical Field
The utility model relates to a micro-flow sampling gas meter.
Background
At present, the domestic gas meter technology is mature day by day, and the gas meter is developed to the intelligent meter reading today from the early stage of purely manual meter reading. This intermediate experience of electronics innovation is not trivial. With the gradual maturity of technology, the acquisition of measurement information also moves towards low cost, high efficiency, low loss, long life orientation. In the aspect of signal acquisition, each instrument manufacturer is long, and the effort is made to sample and is accomplished high accurate, low cost, development in the aspect of reliable structure.
The gas meter is used as one of the metering devices, and the gas meter is required to be subjected to factory detection before factory delivery, wherein the accuracy of the indicating value error detection meter body is a necessary detection requirement of national standards. The accuracy of a gas meter generally involves: and detecting the flow of three points of large flow qmax, medium flow 0.2qmax and small flow qmin. Such detection can effectively detect the accuracy of the meter body, but also has the following problems: when running small flow, because the detection equipment is most convenient at present and is most commonly used, the metering precision is calculated by adopting shooting comparison, and 1 circle of running of the right-most character wheel of the counter, namely 10dm of detection gas is needed for calibration; however, at a small flow rate, since the flow rate is too small, a lot of time is consumed for the detection to wait for the detection result.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model aims to provide a technical scheme of a micro-flow sampling gas meter.
A micro-flow sampling gas meter comprises a meter body and a controller box, wherein an output gear is arranged on the meter body, the controller box comprises a base and a front housing, a counter character wheel, a first duplex gear, a speed regulating gear, a first transition gear and a transmission gear are arranged on the base, the output gear is driven to rotate through the mechanical movement of the meter body, the first duplex gear is driven to the speed regulating gear through the rotation of the output gear, the speed regulating gear is driven to the transmission gear through the first transition gear, the transmission gear is meshed with the counter character wheel fixed on the base, the rotation of the character wheel is driven to realize the mechanical flow metering of the counter, a main control circuit board is arranged on the front housing, the micro-meter is characterized in that a sampling gear set is arranged on the base below the main control circuit board, the sampling gear set comprises a second duplex gear, a sampling wheel, a second transition gear and a micro-sampling wheel, sampling magnetic steel is arranged on the sampling wheel and the micro-sampling wheel through the second transition gear, a sensor is arranged on the main control circuit board relative to the rotation track of the sampling wheel and the micro-sampling wheel, and the micro-sampling magnetic steel is arranged on the main control circuit board, and the sensor is driven to realize the magnetic field approaching to the intelligent flow metering gas meter when the micro-meter rotates.
The micro-flow sampling gas meter is characterized in that the tooth ratio of the micro-sampling wheel to the sampling wheel is 1:4.
The micro flow sampling gas meter is characterized in that the gear ratio of the second duplex gear to the transmission gear is 1:2.5.
the micro-flow sampling gas meter is characterized in that the gear ratio of the sampling wheel to the second duplex gear is 1:2.
The micro-flow sampling gas meter is characterized in that the gear ratio of the second transition gear to the sampling gear is 5:6.25.
The micro-flow sampling gas meter is characterized in that the tooth ratio of the micro-sampling wheel to the transmission gear is 1:20.
the micro-flow sampling gas meter is characterized in that the ratio of the number of teeth of the sampling wheel to the number of teeth of the transmission gear is 1:5.
The micro-flow sampling gas meter is characterized in that the sensor is a Hall sensor.
The utility model outputs a group of gear transmission ratios by utilizing the sampling gear set, improves the rotating speed of the sampling wheel, collects signals by the collector integrated on the main control circuit board, does not need wires or additional circuit boards, and reduces the cost; the gas meter can also achieve the purpose of information sampling rapidly when in use with small flow, is convenient and rapid, saves production cost and improves production efficiency.
The utility model has the advantages that:
1. in actual mass production, when the indication error detects small flow, the ventilation quantity of the original small flow is at least 10dm (the counter character wheel rotates at least one circle to collect signals), signals can be collected only by a ventilation quantity micro-collection wheel of at most 0.5dm at present, the sampling time is 40 times earlier, a plurality of sample plate quantities can be collected in an early time period, and the precision test and the production efficiency of the meter body are improved in production;
2. when the gas meter is used on line, the gas company can quickly and effectively check whether the meter body has internal leakage or not in the periodic security check or the self check of the user, if so, the air inlet valve is closed, the detection device is started, and the abnormal condition of whether the meter body has internal leakage or not can be judged after waiting for 1-2 minutes.
Drawings
FIG. 1 is a schematic diagram of a base and a counter;
FIG. 2 is a schematic diagram of an arrangement of gears behind the counter of FIG. 1;
FIG. 3 is a schematic diagram of the components of the meter body, base, front housing;
in the figure: 1-a base, 2-a counter character wheel, 3-an output gear, 4-a first duplex gear, 5-a speed regulating gear, 6-a first transition gear, 7-a transmission gear, the device comprises an 8-second duplex gear, a 9-sampling wheel, a 10-second transition gear, an 11-micro-sampling wheel, 12-sampling magnetic steel, 13-meter body and 14-front housing.
Detailed Description
The utility model is further described below with reference to the accompanying drawings:
the utility model provides a micro-flow sampling gas meter, including the strapping table body 13 and controller box, set up output gear 3 on the strapping table body, the controller box includes base 1 and front housing 14, set up counter word wheel 2 on the base 1, first duplex gear 4, speed governing gear 5, first transition gear 6 and drive gear 7, through the mechanical motion of gas flow strapping table body, make output gear 3 rotatory drive first duplex gear 4 drive speed governing gear 5, speed governing gear 5 passes through first transition gear 6 and drives drive gear 7, drive gear 7 meshes with counter word wheel 2 fixed on the base, drive the rotation of word wheel realizes the mechanical flow measurement of counter, set up the master control circuit board on the front housing 14, set up the sampling gear train on the base of master control circuit board below, the sampling gear train includes second duplex gear 8, sampling wheel 9, second transition gear 10 and micro-sampling wheel 11, first transition gear 6 rotates and passes through duplex gear 8 and drives micro-sampling wheel 11 through second transition gear 10, all set up magnet steel plate and micro-sampling wheel 11 on the sampling wheel 9 and micro-sampling wheel 11, set up magnet steel plate and the rotation sensor when setting up magnetic steel sensor magnetic field sensor and micro-sampling line sensor when setting up the micro-meter magnetic field sensor is close to the measuring track.
The flow range according to the national standard GB/T6968-2019 of the diaphragm gas meter is as follows:
the flow range of G1.6-G4 is 0.016m, 2/h-6 m and 2/h, and for the flow, the speed matching design is carried out on the meter body to obtain the following gear ratio:
through a lot of experiments, when the transmission gear 7, the second duplex gear 8 and the sampling wheel 9 are operated at 3 representative flow points (maximum flow: qmax, middle flow: 0.2 times qmax small flow: qmin), the number of turns rotated per hour is found that the number of turns rotated by the sampling wheel 9 and the second duplex gear 8 cannot be an integer number of turns when running for 1 hour, so when the transmission ratio of the micro-sampling wheel 11 is selected (micro-flow sampling wheel), the speed is increased by 4 times compared with the sampling wheel 9, namely the number of turns operated per hour of the micro-sampling wheel in the following table:
note that: in the table, r is the number of turns and h is the number of hours.
The rotation speed ratio can be known by the design of the gear with the table:
the tooth ratio of the micro-picking wheel and the transmission gear is 1:20, the gear ratio of the sampling wheel to the transmission gear is 1:5, the gear ratio of the micro-sampling wheel 11 to the sampling wheel 9 is 1:4, and the gear ratio of the second duplex gear 8 to the transmission gear 7 is 1:2.5, the ratio of the sample wheel 9 to the second double gear 8 is 1:2 and the ratio of the second transition gear 10 to the sample wheel 9 is 5:6.25.
It is known that, for each revolution of the transmission gear, the counter wheel displays 5L of wheels,
the gear ratio of the second duplex gear 8 meshed with the first transition gear 6 to the transmission gear 7 is 1:2.5, when the transmission gear 7 rotates by 1r, the second duplex gear 8 rotates by 2.5r, and the sampling wheel is similarly rotated by 5r, the second transition gear rotates by 6.25r, and the micro-sampling wheel rotates by 20r;
the transmission gear 1 r=5dm is used for generating the gas, and the micro-mining wheel 1 r=0.25 dm is used for generating the gas.
According to the requirement G1.6 of the national standard GB/T6968-2019 document of the diaphragm gas meter, the flow requirement G1.6 is 3 dm/h, namely 0.05 dm/min, the micro-mining wheel 11 rotates for one circle within 5 minutes under the condition that the gas meter senses, a sensor (such as a Hall sensor) on a main control circuit board collects a magnetic field of sampling magnetic steel 12 above the micro-mining wheel 11 to collect signals, and the signals are fed back to the main control circuit board to be processed and output. The starting flow of the table with other specifications and models is larger than that of the table with G1.6, so that the time for identifying and sampling is shorter.
The utility model has the advantages that:
1. in actual mass production, when the indication error detects small flow, the ventilation rate of the original small flow is at least 10dm (the counter character wheel rotates at least one circle to collect signals), at present, the signals can be collected only by the micro-sampling wheel with ventilation rate of at most 0.5dm, the sampling time is 40 times earlier, a plurality of sample plate amounts can be collected in an early time period, and the precision test and the production efficiency of the meter body are improved in production;
2. when the gas meter is used on line, the gas company can quickly and effectively check whether the meter body has internal leakage or not in the periodic security check or the self check of the user, if so, the air inlet valve is closed, the detection device is started, and the abnormal condition of whether the meter body has internal leakage or not can be judged after waiting for 1-2 minutes.
Claims (8)
1. The utility model provides a micro-flow sampling gas meter, including the strapping table body and the controller box, set up output gear on the strapping table body, the controller box includes base and front shroud, set up counter word wheel on the base, first duplex gear, the speed governing gear, first transition gear and drive gear, through the mechanical motion of gas flow strapping table body, make output gear rotatory drive first duplex gear transmission to the speed governing gear, the speed governing gear passes through first transition gear transmission to drive gear, drive gear meshes with the counter word wheel fixed on the base, the mechanical flow measurement of counter is realized in the rotation of drive word wheel, set up the master control circuit board on the front shroud, its characterized in that set up sampling gear group on the base of master control circuit board below, sampling gear group includes second duplex gear, sampling wheel, second transition gear and micro-sampling wheel, first transition gear rotates and passes through the transmission of second transition gear to the sampling wheel, sampling wheel and micro-sampling wheel are gone up all to set up sampling magnet steel, the relative sampling wheel of master control circuit board sets up the sensor with the micro-sampling wheel on the rotation orbit line of micro-sampling wheel, when the sampling wheel and micro-sampling wheel rotate, the sensor is close to the magnetic field of sensor realization flow when sensing with micro-gas meter rotates, the intelligent flow measurement magnetic field that can leave.
2. The micro-flow sampling gas meter of claim 1, wherein the ratio of the number of teeth of the micro-sampling wheel to the sampling wheel is 1:4.
3. The micro-flow sampling gas meter according to claim 1, wherein the gear ratio of the second duplex gear to the transmission gear is 1:2.5.
4. the micro-flow sampling gas meter of claim 1, wherein the ratio of the number of teeth of the sampling wheel to the number of teeth of the second duplex gear is 1:2.
5. A micro-flow sampling gas meter according to claim 1, wherein the ratio of the second transition gear to the sampling wheel is 5:6.25.
6. The micro-flow sampling gas meter according to claim 1, wherein the ratio of the number of teeth of the micro-sampling wheel to the number of teeth of the transmission gear is 1:20.
7. the micro-flow sampling gas meter of claim 1, wherein the ratio of the number of teeth of the sampling wheel to the number of teeth of the transmission gear is 1:5.
8. The micro-flow sampling gas meter according to claim 1, wherein the sensor is a hall sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223552898.2U CN219104090U (en) | 2022-12-30 | 2022-12-30 | Micro-flow sampling gas meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223552898.2U CN219104090U (en) | 2022-12-30 | 2022-12-30 | Micro-flow sampling gas meter |
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| Publication Number | Publication Date |
|---|---|
| CN219104090U true CN219104090U (en) | 2023-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223552898.2U Active CN219104090U (en) | 2022-12-30 | 2022-12-30 | Micro-flow sampling gas meter |
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| CN (1) | CN219104090U (en) |
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- 2022-12-30 CN CN202223552898.2U patent/CN219104090U/en active Active
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