A coal mine ventilation volume detection device

Abstract

The utility model discloses a coal mine ventilation quantity detection device relates to mine ventilation detection technical field, including connecting pipeline, the outer side wall fixed connection of connecting pipeline has the air pipe, and the outer side wall of connecting pipeline is equipped with the limit support for the support of connecting pipeline, ventilation subassembly, ventilation subassembly includes drive motor, and drive motor installs in the inner side wall of connecting pipeline, and the output fixed connection of drive motor has the connecting fan, detection mechanism, detection mechanism sets up in the inner side wall of air pipe, and detection mechanism includes sealing gasket, and the top of air pipe is provided with the placement groove for placing sealing gasket, the utility model discloses through setting up independent detection mechanism and ventilation subassembly cooperation, utilizes drive motor to drive the connecting fan initiative to draw the wind, and sets up detection module in the air pipe, can realize the initiative, accurate detection to mine ventilation quantity, effectively avoided the problem that traditional passive measurement mode is vulnerable to interference, data is not accurate.

Description

Technical Field

[0001] This utility model relates to the field of mine ventilation detection technology, specifically a coal mine ventilation volume detection device. Background Technology

[0002] Currently, coal mine ventilation systems are a crucial link in ensuring safe underground production, and the accurate detection of ventilation volume is directly related to the control of methane concentration and the safety of workers. Traditional ventilation volume detection devices mostly use fixed wind speed sensors or simple anemometers for measurement, which have problems such as limited installation location, susceptibility to dust interference, and poor data stability, making it difficult to achieve real-time and accurate monitoring of mine ventilation conditions.

[0003] In practical applications, some existing devices have relatively simple structures and lack effective sealing and protection designs, making the detection modules susceptible to high humidity and high dust environments, resulting in a shorter service life. In addition, most devices do not integrate gas detection functions, requiring additional sensors, which increases system complexity and maintenance costs, and also affects data synchronization and overall reliability.

[0004] To address the problems raised in the background art, those skilled in the art have proposed a coal mine ventilation volume detection device. Summary of the Invention

[0005] The purpose of this utility model is to provide a coal mine ventilation volume detection device to solve the problems of poor sealing performance, susceptibility to dust interference, single function, inability to simultaneously detect gas concentration, and inconvenient disassembly and cleaning of the filter structure in the existing technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a coal mine ventilation volume detection device, including a connecting pipe, an air outlet pipe fixedly connected to the outer wall of the connecting pipe, and a limiting bracket sleeved on the outer wall of the connecting pipe for supporting the connecting pipe.

[0007] A ventilation assembly, comprising a drive motor mounted on the inner wall of a connecting duct, wherein a connecting fan is fixedly connected to the output end of the drive motor;

[0008] The detection mechanism is located on the inner wall of the air outlet duct. The detection mechanism includes a sealing gasket. A placement groove is provided at the top of the air outlet duct for placing the sealing gasket. A control module is fixedly connected to the bottom end of the sealing gasket. A detection module is fixedly connected to the control module at the bottom for detecting the ventilation volume.

[0009] Preferably, a gas detection module is installed at the front end of the control module for detecting gas in the air, and a rotating handle is rotatably connected to the top of the air outlet pipe, with a limit stop bar rotatably connected to the outer side wall of the rotating handle.

[0010] Preferably, the front end of the limiting stop bar is provided with an oblique groove for connecting with the sealing gasket, and the limiting stop bar slides on the top of the sealing gasket to press and limit the sealing gasket.

[0011] Preferably, the inner wall of the connecting pipe is provided with a filter assembly, the filter assembly includes an arc-shaped sealing plate, the arc-shaped sealing plate is installed on the inner wall of the connecting pipe, two bottom limiting plates are fixedly connected to the two side walls of the connecting pipe near the arc-shaped sealing plate, and two sets of connecting plates are fixedly connected to the two side walls of the arc-shaped sealing plate.

[0012] Preferably, the inner wall of the bottom limiting plate is provided with a connecting screw groove, and the inner wall of the connecting plate is also provided with a placement groove.

[0013] Preferably, the inner wall of the bottom limiting plate is threadedly connected to a limiting screw, and the top of the limiting screw is fixedly connected to a handle for rotating the limiting screw threadedly.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model, by setting up an independent detection mechanism in conjunction with the ventilation components, uses a drive motor to drive the connected fan to actively draw air, and sets up a detection module in the air outlet pipe, can realize active and accurate detection of mine ventilation volume, effectively avoiding the problems of interference and inaccurate data in traditional passive measurement methods.

[0016] 2. This utility model integrates the gas detection module into the front end of the control module, realizing the synchronous detection of ventilation volume and gas concentration, simplifying the system structure, improving monitoring efficiency, and facilitating the timely detection of gas accumulation risks, thus ensuring underground safety.

[0017] 3. This utility model, by setting up a filter assembly consisting of an arc-shaped sealing plate, a bottom limiting plate, a connecting plate, and a limiting screw, and adopting a threaded rotation and pressing connection method, realizes the quick disassembly and assembly of the filter screen and reliable sealing, which facilitates daily maintenance and cleaning, effectively extends the service life of the device, and ensures the long-term stable operation of the detection component in a high-dust environment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This utility model Figure 1 A cross-sectional view of the connecting pipe and the air outlet pipe;

[0021] Figure 3 This utility model Figure 1 A cross-sectional view of the connecting pipe.

[0022] Figure 4 This utility model Figure 3 A cross-sectional view of the bottom limiting plate and connecting plate.

[0023] In the picture:

[0024] 1. Connecting pipe; 11. Air outlet pipe; 12. Limiting bracket; 21. Drive motor; 22. Connecting fan; 23. Sealing gasket; 24. Control module; 25. Detection module; 26. Gas detection module; 27. Rotating handle; 28. Limiting stop bar; 3. Arc-shaped sealing plate; 31. Filter screen; 32. Connecting handle; 33. Bottom limiting plate; 34. Connecting plate; 35. Limiting screw; 36. Connecting screw groove. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] As attached Figure 1 To be continued Figure 4 As shown:

[0027] Example 1: This utility model provides a coal mine ventilation volume detection device, including a connecting pipe 1, an air outlet pipe 11 fixedly connected to the outer wall of the connecting pipe 1, and a limiting bracket 12 sleeved on the outer wall of the connecting pipe 1 for supporting the connecting pipe 1.

[0028] A ventilation assembly, the ventilation assembly including a drive motor 21, the drive motor 21 being installed on the inner side wall of the connecting pipe 1, and a connecting fan 22 being fixedly connected to the output end of the drive motor 21;

[0029] The detection mechanism is located on the inner wall of the air outlet duct 11. The detection mechanism includes a sealing gasket 23. A placement groove is provided at the top of the air outlet duct 11 for placing the sealing gasket 23. A control module 24 is fixedly connected to the bottom end of the sealing gasket 23. A detection module 25 is fixedly connected to the bottom position of the control module 24 for detecting the ventilation volume.

[0030] During operation, the operator first starts the drive motor 21, which drives the connecting fan 22 to rotate, generating directional airflow in the connecting pipe 1. When the airflow is discharged through the air outlet pipe 11, it flows through the detection module 25. The detection module 25 senses the physical parameters of the airflow and transmits the signal to the control module 24 for calculation, ultimately achieving real-time and accurate detection of the mine ventilation volume.

[0031] 1. In one embodiment of the present invention, a gas detection module 26 is installed at the front end of the control module 24 for detecting gas in the air, and a rotating handle 27 is rotatably connected to the top of the air outlet pipe 11, and a limit stop bar 28 is rotatably connected to the outer side wall of the rotating handle 27.

[0032] During operation, the gas detection module 26 continuously samples the gas flowing through the exhaust duct 11 while the device is running. Through the sensitivity of its internal sensors (such as catalytic combustion sensors) to methane concentration, the gas concentration signal is converted into an electrical signal and transmitted to the control module 24. The control module 24 integrates and processes the ventilation volume and gas concentration data to achieve comprehensive monitoring and early warning of the mine's environmental safety status.

[0033] 2. In one embodiment of the present invention, the front end of the limiting stop 28 is provided with an oblique groove for connecting with the sealing gasket 23, and the limiting stop 28 slides on the top of the sealing gasket 23 to press and limit the sealing gasket 23.

[0034] During operation, when the operator needs to install or disassemble the testing mechanism, they first press down and rotate the handle 27 to rotate the limit stop 28. The inclined groove structure at the front end of the limit stop 28 contacts the edge of the sealing gasket 23 and generates a downward force, thereby pressing the sealing gasket 23 tightly into the placement groove at the top of the air outlet duct 11. This mechanical pressing method ensures the sealing of the connection between the testing mechanism and the air outlet duct 11, effectively preventing air leakage, ensuring the accuracy of the test data, and also achieving quick disassembly and assembly for easy maintenance.

[0035] 3. In one embodiment of the present invention, a filter assembly is provided on the inner wall of the connecting pipe 1. The filter assembly includes an arc-shaped sealing plate 3. The arc-shaped sealing plate 3 is installed on the inner wall of the connecting pipe 1. Two bottom limiting plates 33 are fixedly connected to the two side walls of the connecting pipe 1 near the arc-shaped sealing plate 3. Two sets of connecting plates 34 are fixedly connected to the two side walls of the arc-shaped sealing plate 3.

[0036] When working, the first thing the staff needs to do is install the filter screen plate 31. They should align the connecting plate 34 with the gap between the bottom limiting plate 33 and insert it. The arc-shaped design of the arc-shaped sealing plate 3 allows it to fit tightly against the inner wall of the connecting pipe 1, laying the foundation for subsequent compression and sealing, and initially preventing unfiltered air from passing through the edge gaps.

[0037] 4. In one embodiment of the present invention, the inner sidewall of the bottom limiting plate 33 is provided with a connecting screw groove 36, and the inner sidewall of the connecting plate 34 is also provided with a placement groove.

[0038] During operation, the worker first passes the end of the limiting screw 35 through the placement groove on the inner wall of the bottom limiting plate 33 and the connecting plate 34 in sequence. By opening the placement groove on the connecting plate 34, a channel and initial positioning are provided for the limiting screw 35, ensuring that the limiting screw 35 can be accurately aligned with the bottom connecting screw groove 36, thus preparing for the final tightening and locking.

[0039] 5. In one embodiment of the present invention, the inner sidewall of the bottom limiting plate 33 is threadedly connected to a limiting screw 35, and the top of the limiting screw 35 is fixedly connected to a handle for rotating the limiting screw 35 threadedly.

[0040] During operation, the operator first rotates the handle at the top of the limiting screw 35, causing the limiting screw 35 to screw downwards into the connecting screw groove 36. The mechanical downward pressure generated by the rotation of the screw ultimately forces the connecting plate 34 and the arc-shaped sealing plate 3 connected to it to move upwards, so that its arc-shaped surface presses against the inner wall of the connecting pipe 1 to form a reliable seal. At the same time, the filter screen plate 31 is firmly fixed, ensuring that all intake air is effectively filtered, protecting the downstream fan and detection elements.

[0041] Module working principle and model description:

[0042] Control Module 24: This module is the core of the device's data processing. Its working principle is as follows: It receives pulse signals from the detection module 25 and analog voltage / current signals from the gas detection module 26. Through its built-in microprocessor (MCU) and preset algorithm program, it converts the pulse frequency into a wind speed value (m / s) and calculates the real-time airflow (m³ / s) based on the duct cross-sectional area. 3The gas sensor signal is converted into a concentration value (%LEL) at a rate of / s. This data can be uploaded to the mine monitoring system via its integrated communication interface (such as RS485, CAN bus, or wireless module). An embedded microcontroller integrating an ADC (analog-to-digital converter) and communication functions can be selected, such as STMicroelectronics' STM32F103 series or TI's MSP430 series, which features low power consumption, high integration, and strong anti-interference capabilities.

[0043] Detection Module 25: This module is used to detect wind speed. Its working principle typically involves using a mechanical wind turbine sensor or a thermal wind speed sensor. A mechanical wind turbine rotates under the influence of airflow, generating one or more pulse signals per revolution (sensed via photoelectric or magnetoelectric methods). The pulse frequency is linearly related to the wind speed. Thermal sensors calculate wind speed by measuring the heat change caused by fluid flowing over a heating element. In this example, a mechanical wind turbine sensor is more suitable due to its large measurement range, robust structure, and lower cost, making it suitable for monitoring large air volumes in mines. Wind speed probes similar to those from Testo (Germany) or Kanomax (Japan), or similar domestic products, can be selected.

[0044] Gas Detection Module 26: This module is used to detect methane (CH4) concentration. Its working principle is typically based on a catalytic combustion (LEL) sensor. Inside the sensor is a detection element coated with a catalyst (commonly known as the "black element") and a compensation element (commonly known as the "white element"), which together form a Wheatstone bridge. When methane gas undergoes flameless catalytic combustion on the surface of the detection element, its temperature rises, and the resistance changes accordingly, disrupting the bridge balance and outputting an electrical signal proportional to the gas concentration. This sensor technology is mature, has good selectivity for methane detection, and is the most commonly used gas detection technology in coal mine safety monitoring. Suitable sensors include the ME4-CH4 series from Zhengzhou Weisheng Electronics or the CH-A3 series from Alphasense in the UK.

[0045] Working principle: When this device is needed, first install the arc-shaped sealing plate 3 and the filter plate 31 into the connecting pipe 1. Then, insert the limiting screw 35 into the groove opened in the connecting plate 34. Then, rotate the limiting screw 35 to make the limiting screw 35 and the connecting screw groove 36 threaded together. After the limiting screw 35 rotates to a certain extent, it will squeeze the connecting plate 34, making the connecting plate 34 with the arc-shaped sealing plate 3 fit tightly against the connecting pipe 1 to achieve a sealing effect. Next, place the sealing gasket 23 on the top of the air outlet pipe 11, so that the detection module 25, control module 24 and gas detection module 26 all enter the air outlet pipe 11. Then, rotate the rotating handle 27, so that the rotating handle 27 moves the limiting stop bar 28. When the limit stop bar 28 rotates, the inclined groove at the front end of the sealing gasket 23 will slowly compress the sealing gasket 23, making it easier to press the sealing gasket 23 inward and deform it to achieve a sealing effect. During operation, the drive motor 21 will drive the connecting fan 22 to work, allowing the connecting fan 22 to draw the internal air outward, creating a negative pressure inside and introducing fresh air. The air passes through the filter screen 31 to filter the coal slag. The air flow will exert a force on the detection module 25, causing the fan blades of the detection module 25 to rotate. The control module 24 will detect the rotation of the detection module 25 and determine the air volume to upload data. The gas detection module 26 can detect the gas content in the air.

[0046] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A coal mine ventilation volume detection device, characterized in that: It includes a connecting pipe (1), an air outlet pipe (11) is fixedly connected to the outer wall of the connecting pipe (1), and a limiting bracket (12) is sleeved on the outer wall of the connecting pipe (1) for supporting the connecting pipe (1); A ventilation assembly, the ventilation assembly including a drive motor (21), the drive motor (21) being installed on the inner side wall of the connecting pipe (1), and a connecting fan (22) being fixedly connected to the output end of the drive motor (21); The detection mechanism is set on the inner wall of the air outlet pipe (11). The detection mechanism includes a sealing gasket (23). The top of the air outlet pipe (11) is provided with a placement groove for placing the sealing gasket (23). The bottom end of the sealing gasket (23) is fixedly connected to a control module (24). The control module (24) is fixedly connected to a detection module (25) at the bottom position for detecting the ventilation volume.

2. The coal mine ventilation volume detection device according to claim 1, characterized in that: The front end of the control module (24) is equipped with a gas detection module (26) for detecting gas in the air. The top of the air outlet pipe (11) is rotatably connected to a rotating handle (27), and the outer side wall of the rotating handle (27) is rotatably connected to a limit stop bar (28).

3. The coal mine ventilation volume detection device according to claim 2, characterized in that: The front end of the limiting rod (28) is provided with an oblique groove for connecting with the sealing gasket (23). The limiting rod (28) slides on the top of the sealing gasket (23) to press and limit the sealing gasket (23).

4. The coal mine ventilation volume detection device according to claim 1, characterized in that: The inner wall of the connecting pipe (1) is provided with a filter assembly, which includes an arc-shaped sealing plate (3). The arc-shaped sealing plate (3) is installed on the inner wall of the connecting pipe (1). Two bottom limiting plates (33) are fixedly connected to the two side walls of the connecting pipe (1) near the arc-shaped sealing plate (3). Two sets of connecting plates (34) are fixedly connected to the two side walls of the arc-shaped sealing plate (3).

5. The coal mine ventilation volume detection device according to claim 4, characterized in that: The inner wall of the bottom limiting plate (33) is provided with a connecting screw groove (36), and the inner wall of the connecting plate (34) is also provided with a placement groove.

6. The coal mine ventilation volume detection device according to claim 5, characterized in that: The inner wall of the bottom limiting plate (33) is threadedly connected to a limiting screw (35), and the top of the limiting screw (35) is fixedly connected to a handle for rotating the limiting screw (35) threadedly.

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