A metering and monitoring device for surface wells used in mine gas extraction

Abstract

This utility model relates to a metering and monitoring device for surface wells used in mine gas extraction, belonging to the field of coal mine safety monitoring technology. It addresses the problems of large measurement errors at low flow rates, poor adaptability to high dust and humidity environments, insufficient multi-parameter collaborative monitoring, and inconvenient installation and maintenance in existing technologies. The technical solution includes: an intrinsically safe DC power supply integrated with a display and metering monitoring terminal; an intrinsically safe junction box to connect an ultrasonic gas flow sensor and a laser methane sensor; a wireless communication module that transmits data via RS485 and Ethernet interfaces; a circuit breaker assembly for overload protection; and support for wall-mounted and bracket-mounted installation, along with a photovoltaic power monitoring interface. The technical benefits include high-precision monitoring of gas flow and concentration, improved adaptability to complex environments, enhanced explosion-proof and dust-proof capabilities, simplified wiring and installation, support for remote communication and energy management, and ensured coal mine safety and accurate carbon emission accounting.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine safety monitoring technology, and relates to a metering and monitoring device for surface wells used in mine gas extraction. Background Technology

[0002] Surface wells for coal mine gas extraction are a crucial link in coalbed methane utilization and safe production. The performance of their metering and monitoring devices directly affects gas utilization efficiency, pipeline safety, and the accuracy of carbon emission accounting. Existing surface well metering and monitoring devices have shortcomings in areas such as low flow rate measurement, adaptability to high dust and humidity environments, long-term stability, and intelligent data processing.

[0003] (1) Under low flow conditions (e.g., 0.05~1m) 3 At speeds of 0.5 m / min, traditional flow sensors have large measurement errors, making it difficult to meet the requirements of coal mine safety and carbon trading accounting.

[0004] (2) High dust and high humidity environments can easily cause sensors to become contaminated, affecting data accuracy and increasing maintenance frequency.

[0005] (3) Most existing devices are single-parameter monitoring devices, lacking the ability to coordinate data with external platforms and perform multi-parameter comprehensive analysis.

[0006] (4) Lack of integrated design of photovoltaic power supply monitoring, remote communication and explosion-proof structure, making installation and maintenance inconvenient.

[0007] Therefore, there is an urgent need for a gas extraction surface well metering and monitoring device that can perform high-precision monitoring of multiple parameters in complex coal mine environments, and also has explosion-proof, pollution-proof, easy-to-install, and remote communication functions. Utility Model Content

[0008] In view of this, the purpose of this utility model is to provide a metering and monitoring device for surface wells used in mine gas extraction, so as to solve the problems of insufficient accuracy of low flow rate measurement, poor adaptability to complex environments, single interface function, and inconvenient installation and maintenance in the existing technology, and to achieve stable and high-precision metering and monitoring of parameters such as gas flow rate and methane concentration. At the same time, it has multiple communication methods, explosion-proof protection structure and multiple installation methods.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A metering and monitoring device for surface wells used in mine gas extraction includes:

[0011] The intrinsically safe DC power supply for mining is used to power the equipment and has a mining-grade encapsulation and intrinsically safe structure.

[0012] The wireless communication module, including an antenna, an RS485 signal interface and an Ethernet interface, is used to transmit the collected sensor data to an external data receiving device.

[0013] The intrinsically safe display and metering monitoring terminal is connected to an intrinsically safe DC power supply for mining and is used for the acquisition, display, and metering monitoring of sensor data.

[0014] The intrinsically safe junction box is connected to the intrinsically safe display metering and monitoring terminal, and is electrically connected to the external intrinsically safe ultrasonic gas flow sensor for mining and the laser methane sensor for coal mine pipelines.

[0015] The circuit breaker assembly includes a 2P circuit breaker connected to an intrinsically safe DC power supply for mining and a 3P circuit breaker connected to an intrinsically safe display metering and monitoring terminal;

[0016] The intrinsically safe junction box has a mis-insertion prevention structure, and the mining intrinsically safe DC power supply and the intrinsically safe display metering and monitoring terminal are housed in the same housing.

[0017] The device is equipped with a photovoltaic power monitoring interface, which collects photovoltaic power data through a dedicated power interface and supports dual power input.

[0018] The device can be fixed in two ways: wall-mounted and bracket-mounted, and is connected to external wiring through a waterproof wiring cavity and an explosion-proof connector.

[0019] The beneficial effects of this utility model are as follows:

[0020] (1) The DC power supply, display metering terminal, communication module and junction box are integrated into the design to reduce the complexity of installation and wiring;

[0021] (2) It has an explosion-proof, anti-misinsertion, dustproof and waterproof structure, and is suitable for gas and coal dust explosion hazard locations;

[0022] (3) It can connect to both ultrasonic gas flow sensor and laser methane sensor at the same time, and supports multi-channel signal input and remote transmission.

[0023] (4) Provides RS485, Ethernet optical and electrical ports, with a transmission distance of 4km to 20km and high compatibility;

[0024] (5) Supports wall mounting and bracket fixing methods, which facilitates rapid deployment under different site conditions;

[0025] (6) Supports photovoltaic power monitoring and dual-path power input to improve power supply stability and energy consumption management capabilities.

[0026] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0028] Figure 1 This is a schematic diagram of the connection lines for the monitoring box device of this utility model;

[0029] Figure 2 This is a schematic diagram of the wireless transceiver connection of this utility model;

[0030] Figure 3 This is a schematic diagram of the connection of the intrinsically safe DC power supply for mining encapsulation according to this utility model.

[0031] Reference numerals: 1: Intrinsically safe DC power supply for mining; 2: Wireless communication module; 21: Antenna; 22: RS485 signal interface; 23: Ethernet optical port; 24: Ethernet electrical port; 3: Intrinsically safe display metering and monitoring terminal; 31: Internal storage unit; 4: Intrinsically safe junction box; 5: Circuit breaker assembly; 51: 2P circuit breaker; 52: 3P circuit breaker; 6: Intrinsically safe ultrasonic gas flow sensor for mining; 7: Laser methane sensor for coal mine pipelines; 71: Positive pressure QSF-2 protective structure; 8: Photovoltaic power monitoring interface; 9: Fixing plate; 10: Expansion bolt; 11: Bracket; 12: Waterproof wiring cavity; 13: Explosion-proof connector; 14: Modular wiring terminal. Detailed Implementation

[0032] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0034] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0035] Example 1: Basic structural device

[0036] like Figures 1-3 As shown, this embodiment provides a metering and monitoring device for surface wells used in mine gas extraction, including:

[0037] The intrinsically safe DC power supply 1 for mining is used to provide a stable DC power output for the whole machine. The power supply adopts a mining-grade encapsulated and intrinsically safe structure, is equipped with an explosion-proof mark, and has functions such as lightning protection, electromagnetic interference resistance, and electrostatic discharge protection. It achieves isolation and current limiting protection through a built-in power processing circuit.

[0038] The intrinsically safe display and metering monitoring terminal 3 is connected to the intrinsically safe DC power supply 1 for mining and is housed in the same housing. It is equipped with an explosion-proof mark and is used to collect, display and store external sensor data. It supports internal parameter reading and setting and is equipped with an anti-static LCD screen and buttons.

[0039] The intrinsically safe junction box 4 is electrically connected to the intrinsically safe display metering and monitoring terminal 3. It is equipped with an explosion-proof mark and adopts a reverse insertion prevention structure. The internal wiring terminals are connected to the external intrinsically safe ultrasonic gas flow sensor 6 for mining and the laser methane sensor 7 for coal mine pipelines through the explosion-proof connector 13.

[0040] The wireless communication module 2 includes an antenna 21, an RS485 signal interface 22 (5 channels, maximum transmission distance 4km), an Ethernet optical port 23 (2 channels, maximum transmission distance 20km), and an Ethernet electrical port 24 (1 channel, maximum transmission distance 100m), which is used to transmit the collected sensor data to an external monitoring system via RS485 bus signals and 4G wireless signals.

[0041] The circuit breaker assembly 5 includes a 2P circuit breaker 51 and a 3P circuit breaker 52. The 2P circuit breaker is connected to the input terminal of the intrinsically safe DC power supply 1 for mining, and the 3P circuit breaker is connected to the input terminal of the intrinsically safe display metering and monitoring terminal 3 for overload and short circuit protection.

[0042] The device in this embodiment is suitable for conventional scenarios of gas extraction and metering monitoring in surface wells. It can stably collect flow and concentration data and realize remote data transmission.

[0043] Example 2: Photovoltaic power supply and multi-installation method device

[0044] Based on Example 1, the device in this example further includes a photovoltaic power monitoring interface 8. This interface collects photovoltaic power data through a dedicated power port and supports dual power input. It can simultaneously connect to photovoltaic power and wind-solar hybrid power to achieve redundant energy supply and energy consumption monitoring.

[0045] Fixed installation methods include wall mounting and bracket mounting:

[0046] The wall-mounted type is suitable for wall installation in ground well machine room. The device is fixed to the wall by fixing plate 9 and expansion bolts 10, and is connected to the external cable through waterproof wiring cavity 12 and explosion-proof connector 13.

[0047] The bracket type is suitable for ground installation near outdoor wellheads. It uses a steel bracket 11 fixing device, the surface of the bracket is treated with anti-corrosion, and it is connected to the ground well pipeline sensor through an underground cable.

[0048] This embodiment is particularly suitable for coal mine sites with unstable power supply conditions or those requiring green energy power supply, and its installation method can be flexibly adapted to different construction environments.

[0049] Example 3: High-precision sensor integration and protection device

[0050] Based on Example 1, the intrinsically safe ultrasonic gas flow sensor for mining connected to the device in this example has a range of 0.05–50 m. 3 / min, with an accuracy better than ±3%, which can meet the measurement needs of the entire range from low flow rate to high flow rate.

[0051] The laser methane sensor for coal mine pipelines adopts a design with a positive pressure QSF-2 protective structure 71, which forms a slight positive pressure inside the shell to prevent dust and moisture from entering the internal optical components of the sensor, thereby improving the long-term stability and anti-pollution capability of the sensor.

[0052] In addition, the intrinsically safe junction box 4 of the device adopts modular terminal blocks 14, which supports quick plug-in maintenance. When it is necessary to replace or repair the sensor, only the corresponding terminal block needs to be unplugged, without disassembling the whole machine.

[0053] This embodiment is suitable for wellhead environments with high dust concentration and high humidity. Through sensor protection design and modular maintenance, the service life of the equipment is extended and the operation and maintenance costs are reduced.

[0054] Example 4: Integrated Communication and Data Platform Compatible Device

[0055] Based on embodiments 1 to 3, the wireless communication module 2 in this embodiment connects to an external data platform through a unified data protocol, supports TCP / IP protocol and coal mine industry standard communication protocol, and realizes data docking with coal mine safety monitoring system, energy management platform and carbon emission monitoring platform.

[0056] The communication module in this embodiment can automatically select RS485 wired communication or 4G wireless communication according to the site conditions, and store the data in the internal storage unit 31 of the intrinsically safe display metering and monitoring terminal 3 when the communication is interrupted. The data will be automatically uploaded after the communication is restored to ensure data integrity.

[0057] This embodiment is particularly suitable for smart mine construction scenarios that require synchronizing gas extraction data to multiple platforms.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A metering and monitoring device for surface wells used in mine gas extraction, characterized in that: This includes intrinsically safe DC power supplies for mining, wireless communication modules, intrinsically safe display, metering and monitoring terminals, intrinsically safe junction boxes and circuit breaker assemblies; The intrinsically safe DC power supply for mining is connected to and powers the intrinsically safe display, metering, and monitoring terminal. The intrinsically safe display metering and monitoring terminal is connected to the intrinsically safe junction box; The intrinsically safe junction box is electrically connected to an external intrinsically safe ultrasonic gas flow sensor for mining and a laser methane sensor for coal mine pipelines. The wireless communication module is connected to the intrinsically safe display metering and monitoring terminal and the external data receiving device, respectively. The circuit breaker assembly includes a 2P circuit breaker connected to the intrinsically safe DC power supply for mining and a 3P circuit breaker connected to the intrinsically safe display metering and monitoring terminal.

2. The metering and monitoring device for surface wells used in mine gas extraction according to claim 1, characterized in that: The intrinsically safe DC power supply for mining is a mining-grade encapsulated and intrinsically safe structure.

3. The metering and monitoring device for surface wells used in mine gas extraction according to claim 1, characterized in that: The intrinsically safe display metering and monitoring terminal is an intrinsically safe structure for mining applications.

4. The metering and monitoring device for surface wells used in mine gas extraction according to claim 1, characterized in that: The intrinsically safe junction box is an intrinsically safe structure for mining and has a structure to prevent incorrect insertion.

5. The metering and monitoring device for surface wells used in mine gas extraction according to claim 1, characterized in that: The wireless communication module includes an antenna, an RS485 signal interface, and an Ethernet interface. The RS485 signal interface has 5 channels and a maximum transmission distance of 4km. The Ethernet interface includes 2 optical ports and 1 electrical port, with maximum transmission distances of 20km and 100m, respectively.

6. The metering and monitoring device for surface wells used in mine gas extraction according to claim 1, characterized in that: The intrinsically safe DC power supply for mining and the intrinsically safe display, metering, and monitoring terminal are housed in the same casing.

7. The metering and monitoring device for surface wells used in mine gas extraction according to claim 1, characterized in that: The device is equipped with a photovoltaic power monitoring interface, which collects photovoltaic power data through a dedicated power interface and supports dual-channel power input.

8. The metering and monitoring device for surface wells used in mine gas extraction according to claim 1, characterized in that: The device can be fixed in two ways: wall-mounted and bracket-mounted, and is connected to external wiring through a waterproof wiring cavity and an explosion-proof connector.

9. The metering and monitoring device for surface wells used in mine gas extraction according to claim 1, characterized in that: The laser methane sensor for coal mine pipelines includes a positive pressure QSF-2 protective structure.

10. The metering and monitoring device for surface wells used in mine gas extraction according to claim 1, characterized in that: The mine intrinsic safety ultrasonic gas flow sensor has a range of 0.05-50 m 3 / min.

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