CN216714459U - Automatic control monitoring device for orifice plate flowmeter for coal mine gas extraction pipeline - Google Patents
Automatic control monitoring device for orifice plate flowmeter for coal mine gas extraction pipeline Download PDFInfo
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- CN216714459U CN216714459U CN202122549190.0U CN202122549190U CN216714459U CN 216714459 U CN216714459 U CN 216714459U CN 202122549190 U CN202122549190 U CN 202122549190U CN 216714459 U CN216714459 U CN 216714459U
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Abstract
The utility model discloses an automatic control and monitoring device for a hole plate flowmeter for a coal mine gas extraction pipeline, which comprises a gas extraction pipeline, a bypass pipeline communicated with the gas extraction pipeline, a control substation or a ground central station, wherein the gas extraction pipeline is provided with the hole plate flowmeter, a three-parameter sensor and a laser methane sensor, the middle part of the bypass pipeline is provided with a pneumatic butterfly valve device, the gas inlet end of the laser methane sensor is connected with a water filter, and the water filter is communicated with the gas extraction pipeline. All the sensors and the automatic control device of the pneumatic valve of the device are provided with intelligent communication interfaces, so that the real-time transmission of detection data can be realized, the detection data of each sensor can be uploaded to a ground center computer through a remote control function and can be used as effective data of a timing period, and the acquired effective data is automatically substituted into software to calculate the required gas purity and the gas cumulant, so that the remote automatic control detection is realized.
Description
Technical Field
The utility model relates to the field of coal mine gas extraction, in particular to an automatic control and monitoring device for a perforated plate flowmeter for a coal mine gas extraction pipeline.
Background
Gas is one of multiple serious disasters in coal mining, so that the national requirements (AQ1027-2006 and the like) for high-gas mines and mines with gas outburst risks need to implement a method of first pumping and then mining so as to reduce the total gas content in a coal seam, and the gas pumping reaches a certain pumping proportion so as to be capable of producing and mining coal. Along with the development of intelligent construction of coal mines, in the field of gas extraction, the application range of automatic control monitoring under coal mines is more and more extensive.
The traditional measurement and detection method in the coal mine gas extraction measurement work comprises the following steps: and (3) gas concentration detection: the gas in the pipeline is manually pumped out by utilizing an air pumping device (an air pumping cylinder) through an air taking hole reserved on the pipeline, and then the gas concentration of the pipeline gas is observed by using a manual optical gas machine (a simple gas spectrum instrument).
At present, the technology for automatically detecting the gas concentration is commonly used in coal mines. However, the orifice plate measurement detection points are all manually detected at present, and the following flow, negative pressure and temperature detection methods are also purely manually operated as above.
Detecting the gas flow: according to the related national requirements on coal mine gas drainage, an orifice plate flowmeter is used as a basic flow detection method at each detection point. The specific detection method comprises the following steps: and a glass U-shaped water column differential pressure gauge is respectively connected to two ends of the positive and negative pressure air taking nozzle of the orifice plate flowmeter, the bypass valve is closed, the orifice plate differential pressure is read, the standard condition flow is calculated according to the orifice plate coefficient, the differential pressure value, the negative pressure and the temperature, and then the gas purity and the gas cumulant are calculated. And after the measurement is finished, the bypass valve is opened to improve the pipeline resistance formed by the orifice plate.
And (3) detecting negative pressure of gas: generally, a mechanical pointer type negative pressure meter or a glass mercury U-shaped differential pressure meter is connected to a pipeline sampling hole, and numerical values are read manually.
And (3) temperature detection: the test tube is directly inserted into a test hole for reading by using a common mercury or alcohol thermometer.
Finally, the measured data is manually substituted into a formula for calculation, and various reports are manually filled.
At present, automatic detection technology is also used for coal mine gas extraction measurement and detection, and among 4 measurement detection parameters, the current automatic detection technology for gas concentration, negative pressure and temperature is basically mature, and only flow detection is not mature.
Common automatic flow detection modes comprise a vortex street flow velocity detection method, a turbine speed measurement method, a V cone differential pressure detection method, a power bar differential pressure detection method, a pitot tube differential pressure detection method and the like, all of which are caused by poor specific environment of a coal mine, have different adaptability problems, are easy to be blocked by coal slag, and have higher requirements on the gas flow velocity range by some methods, so that the field comprehensive use effect cannot exceed that of an original orifice plate flowmeter with a pure metal structure. And for this reason, coal mine regulations require that orifice plate flowmeters must be retained as the final means of manual verification.
However, the orifice plate flowmeter is used for automatically detecting the orifice plate and simultaneously controlling the orifice plate automatically due to the operation problem of the bypass valve, and the orifice plate flowmeter is difficult to automatically control and detect the orifice plate because the use of strong electricity is strictly limited in some characteristic places of coal mines and common electric valves cannot be used. This is one reason why many automatic detection techniques circumvent the use of the automatic detection method of the orifice plate.
And a large amount of labor is required to be invested in measurement and detection work and equipment maintenance, the requirement on the quality of operating personnel is high, and the problem that the difference of manually read values cannot be avoided is solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that a large amount of manpower is required to be invested, the reading of the manual detection has errors in the traditional orifice plate measurement and detection method, and different adaptability exists in the conventional flow automatic detection mode due to the fact that the specific environment of a coal mine is poor in the traditional orifice plate measurement and detection method, and provide an automatic control and monitoring device for an orifice plate flow meter for a coal mine gas extraction pipeline.
In order to achieve the purpose, the utility model adopts the following technical scheme:
an automatic control and monitoring device for a pore plate flowmeter for a coal mine gas extraction pipeline comprises a gas extraction pipeline, a bypass pipeline communicated with the gas extraction pipeline, a control substation or a ground central station, wherein the gas extraction pipeline is provided with a pore plate flowmeter, a three-parameter sensor and a laser methane sensor, the middle part of the bypass pipeline is provided with a pneumatic butterfly valve device, the air inlet end of the laser methane sensor is connected with a water filter, the water filter is communicated with the gas extraction pipeline, the laser methane sensor and the water filter device are installed on the gas extraction pipeline in an insertion type installation mode and are connected to the control substation or the ground central station through a power supply and communication signal line, the three-parameter sensor is connected with sampling air nozzles at two ends of the pore plate flowmeter and is connected to the control substation or the ground central station through a power supply and communication signal line, the pneumatic butterfly valve is connected with a pneumatic butterfly valve control box through a pneumatic butterfly valve control air pipe, the pneumatic butterfly valve control box is connected with a compressed air inlet pipeline, and the pneumatic butterfly valve control box is connected to a control substation or a ground central station through a power supply and control signal line.
Preferably, the laser methane sensor is connected with the control substation or the ground central station through a first power supply and communication signal circuit, the laser methane sensor is high in measurement precision, accurate in measurement range, good in field operation stability and small in maintenance amount, a measurement element does not directly contact a measured medium, the laser methane sensor is convenient to adjust, a matched water filter adopts an inserted installation mode, the process is simple and easy to operate, no pressure loss exists in the pipeline, and a self-calibration technology is adopted to avoid daily maintenance.
Preferably, the both ends of three parameter sensor are connected with first detection pneumatic valve and second detection pneumatic valve respectively through two detection rubber tubes, and first detection pneumatic valve and second detection pneumatic valve have connected gradually first sample air cock and second sample air cock, and first sample air cock and second sample air cock are connected respectively at orifice plate flowmeter both ends, orifice plate differential pressure detects, and the electronic differential pressure gauge of the stable film capacitance formula principle of use technique replaces the U type water column differential pressure gauge of artifical detection, has so both kept high reliability, high environmental suitability and the fabulous anti-blocking ability of orifice plate flowmeter, has realized automated inspection's purpose again.
Preferably, the pneumatic butterfly valve is connected with a pneumatic butterfly valve control box through a pneumatic butterfly valve control air pipe, the pneumatic butterfly valve control box is connected with a compressed air inlet pipeline through an air pipe, a control signal circuit is connected with a field display screen through a power supply and control signal circuit, the bypass valve uses the pneumatic butterfly valve, the coal mine intrinsic safety type electric valve which is a safe power supply standard with extremely low energy consumption is controlled through low-voltage direct current power supply, a compressed air gas circuit used in daily life in a well is controlled, and the opening and closing control of the bypass valve is realized.
Preferably, the three-parameter sensor and the pneumatic butterfly valve control box are connected with a communication signal circuit and a control substation or a ground central station through power supply, detection data of each sensor are uploaded to the ground central computer, the opening and closing period of the bypass valve can be manually set on central computer software, the bypass valve is used as an operation mode when opened and does not collect data, the opening and closing differential pressure data is collected when the bypass valve is closed and is used as effective data of a timing period time period, and the collected effective data is automatically substituted into software to calculate required gas pure quantity and gas cumulant.
The utility model has the beneficial effects that:
in the utility model, the data detected by each sensor is uploaded to a ground central computer, wherein the opening and closing period of the bypass valve can be manually set on the central computer software, and the bypass valve is used as an operation mode when opened and does not collect data. When the bypass valve is closed, opening and closing pressure difference data are collected and used as effective data of a timing period time period, the collected effective data are automatically substituted into software to calculate required gas pure quantity and gas cumulant, accordingly, the effect of automatic control detection is achieved, all sensors used for flow detection and an automatic pneumatic valve control device are provided with intelligent communication interfaces, 485 intelligent signal transmission is adopted, real-time transmission of detection data can be achieved, and the remote control function can be achieved.
Drawings
FIG. 1 is a schematic structural diagram of an automatic control monitoring device for a coal mine gas extraction pipeline orifice plate flowmeter, which is provided by the utility model;
in the figure: 1. an orifice plate flowmeter; 2. a three-parameter sensor; 3. a laser methane sensor; 4. a bypass line; 5. a pneumatic butterfly valve; 6. a pneumatic butterfly valve control air pipe; 7. a pneumatic butterfly valve control box; 8. a compressed air inlet pipe; 9. power and control signal lines; 10. detecting the rubber tube; 11-1, a first detection air valve; 11-2, a second detection air valve; 12-1, a first sampling air nozzle; 12-2, a second sampling air nozzle; 13. a first power supply and communication signal line; 14. a water filter; 15. a field display screen; 16. a second power supply and communication signal line; 17. a control substation or a ground central station; 18. and (3) a gas extraction pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, the automatic control and monitoring device for the orifice plate flowmeter for the coal mine gas extraction pipeline comprises an orifice plate flowmeter 1, a bypass pipeline 4, a laser methane sensor 3, a three-parameter sensor 2 and a pneumatic butterfly valve 5 installed on a bypass pipeline, wherein the laser methane sensor 3 is installed on a gas extraction pipeline 18 in a plug-in installation mode in cooperation with a water filtering device 14 and is connected to a control substation or a ground central station 17 through a first power supply and communication signal line 13.
The three-parameter sensor 2 is connected with sampling air nozzles at two ends of the orifice plate flowmeter 1, and is connected to a control substation or a ground central station 17 through a second power supply and communication signal line 16, the pneumatic butterfly valve 5 is connected with a pneumatic butterfly valve control box 7 through a pneumatic butterfly valve control air pipe 6, the pneumatic butterfly valve control box 7 is connected with a compressed air inlet pipeline 8 and is connected to the control substation or the ground central station 17 through a power supply and control signal line 9, detection data of each sensor is uploaded to a ground central computer, and the opening and closing period of the bypass valve can be manually set on central computer software.
When the bypass valve is opened, the bypass valve is used as an operation mode, data are not collected, when the bypass valve is closed, opening and closing pressure difference data are collected and used as effective data of a timing period, the collected effective data are automatically substituted into software to calculate required gas pure quantity and gas cumulant, and therefore the effect of automatic control detection is achieved.
The working principle is as follows: when the bypass pneumatic butterfly valve 5 is opened, the mixed gas passes through the bypass pipeline 4 and the orifice plate flowmeter 1, and data are not collected. When data are required to be collected, the opening and closing period of the pneumatic butterfly valve 5 is manually set on the software of the central computer, when the bypass pneumatic butterfly valve 5 is controlled to be closed through the remote operation pneumatic butterfly valve control box 7, the mixed gas passes through the orifice plate flowmeter 1, the data collected by the three-parameter sensor 2 and the laser methane sensor 3 are automatically substituted into the software to calculate the required gas purity and the required gas accumulation, and therefore the effect of automatic control detection is achieved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the utility model concepts of the present invention in the scope of the present invention.
Claims (5)
1. The utility model provides a colliery gas drainage is orifice plate flowmeter automatic control monitoring devices for pipeline, includes gas drainage pipeline (18), communicates bypass pipeline (4), control sub-station or ground central station (17) on gas drainage pipeline (18), its characterized in that, install orifice plate flowmeter (1), three parameter sensor (2) and laser methane sensor (3) on gas drainage pipeline (18), bypass pipeline (4) mid-mounting has pneumatic butterfly valve (5), the inlet end of laser methane sensor (3) is connected with water filter (14), and water filter (14) and gas drainage pipeline (18) intercommunication.
2. The automatic control and monitoring device for the hole plate flowmeter for the coal mine gas extraction pipeline according to claim 1, wherein the laser methane sensor (3) is connected with a control substation or a ground central station (17) through a first power supply and communication signal line (13).
3. The automatic control and monitoring device for the orifice plate flowmeter for the coal mine gas extraction pipeline according to claim 1, wherein two ends of the three-parameter sensor (2) are respectively connected with a first detection air valve (11-1) and a second detection air valve (11-2) through two detection rubber pipes (10), the first detection air valve (11-1) and the second detection air valve (11-2) are sequentially connected with a first sampling air nozzle (12-1) and a second sampling air nozzle (12-2), and the first sampling air nozzle (12-1) and the second sampling air nozzle (12-2) are respectively connected with two ends of the orifice plate flowmeter (1).
4. The automatic control and monitoring device for the orifice plate flowmeter for the coal mine gas extraction pipeline according to claim 1, wherein the pneumatic butterfly valve (5) is connected with a pneumatic butterfly valve control box (7) through a pneumatic butterfly valve control air pipe (6), the pneumatic butterfly valve control box (7) is connected with a compressed air inlet pipeline (8) through an air pipe, and a control signal line is connected with a field display screen (15) through a power supply and control signal line (9).
5. The automatic control and monitoring device for the orifice plate flowmeter for the coal mine gas extraction pipeline according to claim 1, wherein the three-parameter sensor (2) and the pneumatic butterfly valve control box (7) are connected with a communication signal line (16) and a control substation or a ground central station (17) through a second power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122549190.0U CN216714459U (en) | 2021-10-22 | 2021-10-22 | Automatic control monitoring device for orifice plate flowmeter for coal mine gas extraction pipeline |
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| CN202122549190.0U CN216714459U (en) | 2021-10-22 | 2021-10-22 | Automatic control monitoring device for orifice plate flowmeter for coal mine gas extraction pipeline |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837734A (en) * | 2022-06-21 | 2022-08-02 | 华能云南滇东能源有限责任公司 | Gas discharge device and method for mine coal seam roadway |
| CN116591668A (en) * | 2023-07-19 | 2023-08-15 | 大庆鑫得丰石油技术有限公司 | Flow data acquisition device of gas production wellhead |
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2021
- 2021-10-22 CN CN202122549190.0U patent/CN216714459U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837734A (en) * | 2022-06-21 | 2022-08-02 | 华能云南滇东能源有限责任公司 | Gas discharge device and method for mine coal seam roadway |
| CN114837734B (en) * | 2022-06-21 | 2023-02-07 | 华能云南滇东能源有限责任公司 | Gas discharge device and method for mine coal seam roadway |
| CN116591668A (en) * | 2023-07-19 | 2023-08-15 | 大庆鑫得丰石油技术有限公司 | Flow data acquisition device of gas production wellhead |
| CN116591668B (en) * | 2023-07-19 | 2023-09-22 | 大庆鑫得丰石油技术有限公司 | Flow data acquisition device of gas production wellhead |
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