CN220398688U - Start flow detection device of gas meter - Google Patents
Start flow detection device of gas meter Download PDFInfo
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- CN220398688U CN220398688U CN202322083264.5U CN202322083264U CN220398688U CN 220398688 U CN220398688 U CN 220398688U CN 202322083264 U CN202322083264 U CN 202322083264U CN 220398688 U CN220398688 U CN 220398688U
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- 238000001514 detection method Methods 0.000 title claims abstract description 23
- 230000001105 regulatory effect Effects 0.000 claims abstract description 95
- 238000012544 monitoring process Methods 0.000 claims abstract description 31
- 210000003437 trachea Anatomy 0.000 claims 3
- 238000000034 method Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 89
- 238000012360 testing method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The utility model relates to a start flow detection device of a gas meter. The intelligent pressure regulating valve is characterized by comprising a power supply, an air source device, an intelligent pressure regulating valve, a pressure standard device, a small-flow gas monitoring system, an upper computer regulating system and a gas meter, wherein the power supply is connected with the air source device, the air source device is connected with the intelligent pressure regulating valve through an air pipe, the intelligent pressure regulating valve is connected with the air inlet end of the gas meter through the air pipe, the air outlet end of the gas meter is respectively connected with the pressure standard device and the small-flow gas monitoring system through the air pipe, and the air source device, the intelligent pressure regulating valve, the pressure standard device and the small-flow gas monitoring system are all connected with the upper computer regulating system. The utility model realizes the stable output of the air source flow by adopting the frequency converter and the blower; meanwhile, an intelligent pressure regulating valve is adopted, so that the pressure in a pipeline is regulated, and the pressure is stable in the detection process; by adopting the pressure standard device and the small-flow gas monitoring system, the monitoring of the pressure and the monitoring and fine adjustment of the flow rate are realized.
Description
Technical Field
The utility model relates to a start flow detection device of a gas meter.
Background
The gas meter is a gas flowmeter for measuring gas flow of natural gas, coal gas and the like, and is divided into a diaphragm gas meter, an ultrasonic gas meter and the like according to different working principles. The starting flow is the lowest flow at which the gas meter can start continuous operation, and is a simple, effective and very critical index for judging the performance of one gas meter. The sensitivity of the operation of the gas meter can be clearly judged by the starting flow.
For the detection of the initial flow of the gas meter, the simplest detection mode is to blow the gas meter by a simple small fan, and whether the flow meter starts to run continuously is observed by naked eyes. The method has the advantages of simple and convenient operation and extremely low test cost, and has the defects of uncontrollable ventilation flow and pressure and influence on the effectiveness of the detection result.
Another common method of detection is by compressed air and ball valves as air sources. The ball valve can adjust the gas flow, so that the detection of the starting flow of the gas meters with different specifications is realized. However, the compressed air is used as a gas source, so that the pressure fluctuation is large, and the detection result is inaccurate.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model aims to provide a technical scheme of a starting flow detection device of a gas meter.
The device is characterized by comprising a power supply, an air source device, an intelligent pressure regulating valve, a pressure standard device, a small-flow gas monitoring system, an upper computer regulating system and a gas meter, wherein the power supply is connected with the air source device, the air source device is connected with the intelligent pressure regulating valve through an air pipe, the intelligent pressure regulating valve is connected with an air inlet end of the gas meter through the air pipe, an air outlet end of the gas meter is respectively connected with the pressure standard device and the small-flow gas monitoring system through the air pipe, and the air source device, the intelligent pressure regulating valve, the pressure standard device and the small-flow gas monitoring system are all connected with the upper computer regulating system.
The starting flow detection device of the gas meter is characterized in that the upper computer adjusting system is provided with a flow reading interface, a pressure reading interface, a flow adjusting interface and a pressure adjusting interface, the flow reading interface is connected with a small-flow gas monitoring system, the flow adjusting interface is connected with a gas source device, the pressure adjusting interface is connected with an intelligent pressure regulating valve, and the pressure reading interface is connected with a pressure standard device.
The device is characterized in that the air source device consists of a frequency converter and a blower, the frequency converter and the blower are connected with a power supply, the frequency converter is connected with a flow regulating interface, and the blower sends air to the intelligent pressure regulating valve through an air pipe.
The device is characterized in that the intelligent pressure regulating valve consists of a controller and a pressure regulating valve, the controller is respectively connected with the pressure regulating valve and a pressure regulating interface, and the pressure regulating valve is connected with the gas meter through an air pipe.
The starting flow detection device of the gas meter is characterized in that the pressure standard device consists of a standard device module and a pressure calibrator, the standard device module is connected with the pressure calibrator, the pressure calibrator is connected with the gas meter outlet end through an air pipe, and the pressure calibrator is connected with a pressure reading interface.
The start flow detection device of the gas meter is characterized in that the small-flow gas monitoring system consists of a small-flow gas mass flowmeter and a small-flow regulating valve, one end of the small-flow gas mass flowmeter is connected with the gas outlet end of the gas meter through a gas pipe, the other end of the small-flow gas mass flowmeter is connected with the small-flow regulating valve through a gas pipe, and the small-flow gas mass flowmeter is connected with a flow reading interface.
The utility model realizes the stable output of the air source flow by adopting the frequency converter and the blower; meanwhile, an intelligent pressure regulating valve is adopted, so that the pressure in a pipeline is regulated, and the pressure is stable in the detection process; by adopting the pressure standard device and the small-flow gas monitoring system, the monitoring of the pressure and the monitoring and fine adjustment of the flow rate are realized.
The beneficial effects of the utility model are as follows:
1. the measured flow is adjustable by adopting the air source device, so that the condition of unstable air pressure caused by high air source pressure is avoided;
2. the intelligent pressure regulating valve is adopted for regulating and stabilizing, the regulating performance is good, and the gas pressure is ensured to be stable;
3. the pressure standard device is adopted, so that the high precision and accuracy of pressure monitoring are improved;
4. the small-flow gas monitoring system is adopted, so that the sensitivity of the small-flow gas mass flowmeter is high, and the high precision and accuracy of the flow monitoring value are improved;
5. and the pressure and the flow are monitored, so that the real-time regulation of the pressure and the flow is realized.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
in the figure: the device comprises a 1-power supply, a 2-air source device, a 3-frequency converter, a 4-blower, a 5-air pipe, a 6-intelligent pressure regulating valve, a 7-intelligent controller, an 8-pressure regulating valve, a 9-host computer regulating system, a 10-flow reading interface, an 11-pressure reading interface, a 12-flow regulating interface, a 13-pressure regulating interface, a 14-pressure standard device, a 15-pressure calibrator, a 16-standard device module, a 17-small-flow gas monitoring system, a 18-small-flow gas mass flowmeter, a 19-small-flow regulating valve and a 20-gas meter.
Description of the embodiments
The utility model is further described below with reference to the accompanying drawings:
as shown in fig. 1, the intelligent gas-regulating system comprises a power supply 1, a gas source device 2, an intelligent pressure regulating valve 6, a pressure standard device 14, a small-flow gas monitoring system 17, an upper computer regulating system 9 and a gas meter 20, wherein the power supply 1 is connected with the gas source device 2, the gas source device 2 is connected with the intelligent pressure regulating valve 6 through a gas pipe 5, the intelligent pressure regulating valve 6 is connected with the gas inlet end of the gas meter 20 through the gas pipe, the gas outlet end of the gas meter 20 is respectively connected with the pressure standard device 14 and the small-flow gas monitoring system 17 through the gas pipe, and the gas source device 2, the intelligent pressure regulating valve 6, the pressure standard device 14 and the small-flow gas monitoring system 17 are all connected with the upper computer regulating system 9; the upper computer regulating system 9 is provided with a flow reading interface 10, a pressure reading interface 11, a flow regulating interface 12 and a pressure regulating interface 13, wherein the flow reading interface 10 is connected with a small-flow gas monitoring system 17, the flow regulating interface 12 is connected with the gas source device 2, the pressure regulating interface 13 is connected with the intelligent pressure regulating valve 6, and the pressure reading interface 11 is connected with the pressure standard device 14. The upper computer adjusting system can be realized by directly purchasing the corresponding modules, and the controller can also be obtained directly through purchasing, so that the upper computer adjusting system is the existing module and can be directly purchased and used.
The air source device 2 consists of a frequency converter 3 and an air blower 4, the frequency converter 3 and the air blower 4 are connected with a power supply 1, the frequency converter 3 is connected with a flow regulating interface 12, the frequency converter 3 controls the air blower 4 to work through a signal fed back by the flow regulating interface 12, and the air blower 4 sends air to an intelligent pressure regulating valve 6 through an air pipe; the frequency converter 3 controls the output gas flow of the blower 4, so that gas source outputs with different flow rates can be formed; in addition, the air flow output by the blower 4 has low pressure, and a stable pressure air source can be provided.
The intelligent pressure regulating valve 6 consists of a controller 7 and a pressure regulating valve 8, wherein the controller 7 is respectively connected with the pressure regulating valve 8 and a pressure regulating interface 13, and the pressure regulating valve 8 is connected with a gas meter 20 through a gas pipe; the controller 7 controls the pressure regulating valve 8 to work through a signal fed back by the pressure regulating interface 13, and drives the pressure regulating valve 8 to regulate the pressure according to the electric signal, so that remote automatic control is realized. The upper computer regulating system 9 reads the pressure value fed back by the pressure standard device 14 through the pressure reading interface 11, sends the pressure value to the controller 7 through the pressure regulating interface 13, and the controller 7 compares the obtained pressure value with the pressure value in the air pipe 5 and then sends an instruction to the pressure regulating valve 8.
The pressure standard device 14 consists of a standard module 16 and a pressure calibrator 15, wherein the standard module 16 is connected with the pressure calibrator 15, the pressure calibrator 15 is connected with the gas outlet end of the gas meter 20 through the gas pipe 5, and the pressure calibrator 15 is connected with the pressure reading interface 11; because the detection needs to be compatible with the gas meters 20 with a plurality of specifications, the pressure monitoring range is wider, the single-range pressure standard device cannot meet the detection requirement, and the pressure standard device adopts the replaceable standard device module 16, so that the high precision and accuracy of the pressure reference value monitored by the pressure standard device are improved.
The small-flow gas monitoring system 17 consists of a small-flow gas mass flowmeter 18 and a small-flow regulating valve 19, one end of the small-flow gas mass flowmeter 18 is connected with the gas outlet end of the gas meter through a gas pipe, the other end of the small-flow gas mass flowmeter 18 is connected with the small-flow regulating valve 19 through a gas pipe, and the small-flow gas mass flowmeter 18 is connected with the flow reading interface 10; the small-flow gas mass flowmeter 18 adopts the principle of thermal mass flow measurement, and temperature and pressure compensation is not needed, so that high-precision measurement of the sensor is ensured. Because the flow measurement value is smaller, the flow cannot be monitored by using the flow meter with similar rated flow, the sensitivity of the low-flow gas mass flow meter 18 is high, and the high precision and accuracy of the flow monitoring value are improved; the small flow regulating valve 19 has small regulating resolution, can regulate the flow in a small range, and ensures the accuracy and stability of the flow.
The upper computer regulating system 9 is provided with a flow reading interface 10, a pressure reading interface 11, a flow regulating interface 12 and a pressure regulating interface 13, wherein the flow regulating interface 12 is connected with the air source device 2, the pressure regulating interface 13 is connected with the intelligent pressure regulating valve 6, the pressure reading interface 11 is connected with the pressure standard device 14, and the flow reading interface 10 is connected with the small-flow gas monitoring system 17; the flow regulating interface 12 is connected with the frequency converter 3 and used for regulating the output voltage of the frequency converter 3; the pressure regulating interface 13 is connected with the controller 7 and is used for regulating the pressure of the pressure regulating valve 8; the pressure reading interface 11 is connected with a pressure calibrator 15 and is used for reading pressure data monitored by the pressure standard device 14; the flow reading interface 10 is connected with the small-flow gas mass flowmeter 18 and is used for reading flow data monitored by the small-flow gas mass flowmeter 18. The upper computer adjusting system 9 is a few basic functions, belongs to the prior art in the field, and can be obtained through direct purchase in the market, and is not described herein.
The testing process comprises the following steps:
installing a gas meter 20 into the loop of the air pipe 5, turning on the power supply 1, selecting a test pressure range according to the gas meter flow specification, and installing a corresponding standard module 16;
inputting a flow set value into a flow regulation interface 12, and controlling the flow of an air source output by a blower 4 by a frequency converter 3 according to an input signal;
inputting a pressure set value into the pressure regulating interface 13, and controlling the pressure regulating valve 8 to regulate the pressure in the air pipe 5 after the controller 7 compares the obtained pressure value with the pressure value in the air pipe 5 according to the signal transmitted by the pressure regulating interface 13;
the flow reading interface 10 and the pressure reading interface 11 read flow and pressure values according to time frequency requirements set by the upper computer adjusting system 9, and the upper computer adjusting system 9 adjusts set values input by the flow adjusting interface 12 and the pressure adjusting interface 13 according to read data; when the flow reading interface 10 and the pressure reading interface 11 are stable at the set flow value and pressure value, stopping adjustment and starting to detect the starting flow;
starting the flow detection, manually reading and recording the display value of the gas meter 20; after the detection time is reached, the display value of the gas meter 20 is manually read and recorded, and the detection is finished, and the increase condition of the two readings is compared.
And (3) ending the test flow:
after the detection task is completed, the frequency converter 3 is turned off, the power supply 1 is turned off, and after the pressure and flow are recovered to be normal, the gas meter 20 is taken down, and the standard module 16 is taken out.
Claims (6)
1. The utility model provides a flow detection device that starts of gas table, its characterized in that comprises power, air supply device, intelligent air-vent valve, pressure standard device, low discharge gas monitoring system, host computer governing system and gas table, power is connected with air supply device, air supply device is connected with intelligent air-vent valve through the trachea, intelligent air-vent valve is connected with the gas table air inlet end through the trachea, the gas table air outlet end is connected with pressure standard device and low discharge gas monitoring system through the trachea respectively, air supply device, intelligent air-vent valve, pressure standard device, low discharge gas monitoring system all are connected with host computer governing system.
2. The device for detecting the starting flow of the gas meter according to claim 1, wherein the upper computer regulating system is provided with a flow reading interface, a pressure reading interface, a flow regulating interface and a pressure regulating interface, the flow reading interface is connected with the small-flow gas monitoring system, the flow regulating interface is connected with the gas source device, the pressure regulating interface is connected with the intelligent pressure regulating valve, and the pressure reading interface is connected with the pressure standard device.
3. The device for detecting the start flow of the gas meter according to claim 2, wherein the gas source device comprises a frequency converter and a blower, the frequency converter and the blower are connected with a power supply, the frequency converter is connected with the flow regulating interface, and the blower sends gas to the intelligent pressure regulating valve through a gas pipe.
4. The device for detecting the start flow of the gas meter according to claim 2, wherein the intelligent pressure regulating valve comprises a controller and a pressure regulating valve, the controller is respectively connected with the pressure regulating valve and the pressure regulating interface, and the pressure regulating valve is connected with the gas meter through a gas pipe.
5. The device for detecting the start flow of the gas meter according to claim 2, wherein the pressure standard device comprises a standard module and a pressure calibrator, the standard module is connected with the pressure calibrator, the pressure calibrator is connected with the gas outlet end of the gas meter through a gas pipe, and the pressure calibrator is connected with the pressure reading interface.
6. The device for detecting the initial flow of the gas meter according to claim 2, wherein the small-flow gas monitoring system is composed of a small-flow gas mass flowmeter and a small-flow regulating valve, one end of the small-flow gas mass flowmeter is connected with the gas outlet end of the gas meter through a gas pipe, the other end of the small-flow gas mass flowmeter is connected with the small-flow regulating valve through a gas pipe, and the small-flow gas mass flowmeter is connected with the flow reading interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322083264.5U CN220398688U (en) | 2023-08-04 | 2023-08-04 | Start flow detection device of gas meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322083264.5U CN220398688U (en) | 2023-08-04 | 2023-08-04 | Start flow detection device of gas meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220398688U true CN220398688U (en) | 2024-01-26 |
Family
ID=89600698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322083264.5U Active CN220398688U (en) | 2023-08-04 | 2023-08-04 | Start flow detection device of gas meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220398688U (en) |
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2023
- 2023-08-04 CN CN202322083264.5U patent/CN220398688U/en active Active
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