A coal mine goaf air leakage measuring device

Abstract

The utility model belongs to the coal mine safety production technical field, specifically discloses a kind of coal mine goaf leak detection device, the leak detection device includes gas tank, gas pipeline, first telescopic duct, second telescopic duct and infrared gas sensor etc.;Among them, the inside of gas tank is stored with sulfur hexafluoride tracer gas, gas outlet of gas tank is communicated gas pipeline gas inlet end, gas pipeline gas outlet end is inserted into the inside of first telescopic duct and is connected with first telescopic duct end, and infrared gas sensor is arranged in the end of second telescopic duct.The utility model drives sulfur hexafluoride tracer gas to be released to the deep part of goaf by first telescopic duct gas pipeline, and infrared gas sensor is driven by second telescopic duct to collect the mixed gas sample of shallow part of goaf, and the air flow and tracer gas concentration information are transmitted to data processing calculation module, and the air leakage of goaf different buried depth position is accurately and real-time calculated, and detection efficiency and accuracy are improved.

Description

Technical Field

[0001] This utility model relates to the field of coal mine safety production technology, specifically to a device for detecting air leakage in coal mine goaf areas. Background Technology

[0002] A coal mine goaf is a space formed by overlying rock strata during coal mining. Due to inadequate ventilation systems and limited sealing, this area is highly susceptible to air leakage. Air leakage in the goaf not only disrupts airflow in the underground ventilation system but also allows oxygen to enter, increasing the risk of coal oxidation and heating, spontaneous combustion, and fires, posing a serious threat to mine safety.

[0003] Currently, air leakage detection in coal mine goaf areas mainly relies on manual inspections and conventional monitoring methods such as wind speed and pressure. However, these methods generally suffer from limited spatial coverage, poor real-time performance, and difficulty in achieving long-term online monitoring. In the complex goaf environment, air leakage channels are hidden and dynamically changing, making it difficult for traditional methods to locate leakage points and assess leakage volumes in a timely and accurate manner. This can easily lead to delayed remedial measures and increase safety risks.

[0004] Therefore, this utility model proposes a device for detecting air leakage in coal mine goaf areas. Utility Model Content

[0005] The purpose of this invention is to provide a device for detecting air leakage in coal mine goaf areas. This device can calculate the amount of air leakage in goaf areas by detecting the release and collection of tracer gases, thereby improving detection efficiency and reliability and enhancing the safety of mine ventilation systems.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: A device for detecting air leakage in a coal mine goaf includes a gas storage tank, a gas pipeline, a first telescopic pipe, a second telescopic pipe, and an infrared gas sensor. The first and second expansion pipes are both horizontally installed inside the return airway of the goaf. The gas storage tank contains sulfur hexafluoride tracer gas. The gas outlet of the gas storage tank is connected to the gas inlet of the gas pipeline. The gas pipeline is equipped with a release valve and a flow controller. The gas outlet of the gas pipeline extends into the interior of the first telescopic pipe and is connected to the end of the first telescopic pipe. The first telescopic pipe can drive the gas outlet of the gas pipeline to move laterally along the extension direction of the return airway of the goaf. The infrared gas sensor is installed at the end of the second telescopic pipe, and the second telescopic pipe can drive the infrared gas sensor to move laterally along the extension direction of the return airway in the goaf.

[0007] Preferably, the first telescopic pipe includes a first telescopic arm, a second telescopic arm, a third telescopic arm, and a fourth telescopic arm; The top plate and bottom plate of the first telescopic arm are symmetrically provided with a first rack and a first slider groove; The top and bottom plates of the second telescopic boom are symmetrically provided with a second rack, a first slider, a drive motor, a drive gear, and a first driven gear; wherein, the first slider is slidably connected to the first slider groove, and the output shaft of the drive motor is connected to the drive gear, and the drive gear meshes with the first rack; The top and bottom plates of the third telescopic arm are symmetrically provided with a third rack, a second slider groove, a second driven gear, and a third driven gear; wherein, the first slider is slidably connected to the second slider groove, and the second driven gear meshes with the second rack; the side wall of the third telescopic arm is provided with a third slide rail groove. The top and bottom plates of the fourth telescopic arm are symmetrically provided with a fourth rack, the third driven gear meshes with the fourth rack, and the side wall of the fourth telescopic arm is provided with a second slider, which is slidably connected to the third slide rail groove.

[0008] Preferably, the structural arrangement of the second telescopic pipe is the same as that of the first telescopic pipe.

[0009] Preferably, the preset extension length of the first telescopic pipe is greater than the preset extension length of the second telescopic pipe.

[0010] Preferably, a controller is also provided, which is connected to the control terminals of the drive motor, the release valve and the flow controller via a data cable.

[0011] Preferably, an explosion-proof box is also provided, and the explosion-proof box contains a data processing and calculation module, a data transmission module and a battery module. The infrared gas sensor is connected to the data processing and calculation module, which is used to process and calculate the data measured by the infrared gas sensor. The data processing and calculation module is connected to the controller through the data transmission module, and the battery module provides power to the data processing and calculation module and the data transmission module.

[0012] Preferably, a warning light is provided on the outside of the explosion-proof box.

[0013] Preferably, both the first and second telescopic pipes are connected to the sidewall of the return airway in the goaf via supports.

[0014] The beneficial effects of this utility model are as follows: This invention proposes a device for detecting air leakage in coal mine goaf areas. The device releases sulfur hexafluoride tracer gas into the depths of the goaf through a first telescopic pipe at the outlet of the gas pipeline. A second telescopic pipe drives an infrared gas sensor to collect shallow mixed gas samples from the goaf. By transmitting the airflow and tracer gas concentration information to a data processing and calculation module, the device accurately and in real-time calculates the air leakage at different depths within the goaf, improving detection efficiency and accuracy, and providing solid data support for the scientific control of ventilation systems.

[0015] Furthermore, the design of this utility model device fully considers the complex and ever-changing environmental factors in the goaf area, and the coordinated operation between the various components is stable and reliable, ensuring the normal operation of the device under harsh conditions. Moreover, this utility model air leakage detection device is of great significance for improving the overall safety of the mine and ensuring safe production in coal mines. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the connection of the gas storage tank, gas pipeline, and first telescopic pipe of this utility model. Figure 3 This is a schematic diagram showing the connection of the explosion-proof box, the second telescopic pipe, and the infrared gas sensor of this utility model; Figure 4 This is a schematic diagram of the internal structure of the first telescopic pipe of this utility model. Figure 1 ; Figure 5 This is a schematic diagram of the internal structure of the first telescopic pipe of this utility model. Figure 2 ; Figure 6 This is a schematic diagram of the structure of the first telescopic arm and the second telescopic arm of this utility model; Figure 7 This is a schematic diagram of the structure of the third and fourth telescopic arms of this utility model; Figure 8 This is a schematic diagram of the internal structure of the explosion-proof box of this utility model; Figure 9 This is a schematic diagram of the assembly position of this utility model; Wherein, a-goaf, b-intake airway, c-return airway; 1-Gas storage tank; 2-Gas pipeline; 21-Nozzle; 31-Release valve; 32-Flow controller; 4-Controller; 5-First expansion joint: 51-First telescopic boom: 511-First rack, 512-First slider groove; 52-Second telescopic boom: 521-Second rack, 522-First slider, 523-Drive motor, 524-Driving gear, 525-First driven gear; 53-Third section telescopic boom: 531-Third rack, 532-Second slider groove, 533-Second driven gear, 534-Third driven gear, 535-Third slide rail groove; 54-Fourth telescopic arm: 541-Fourth rack, 542-Second slider; 6-Second telescopic pipe; 7-Infrared gas sensor; 8-Explosion-proof box: 81-Data processing and calculation module, 82-Data transmission module, 83-Battery module, 84-Warning light; 9-Staff. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] Combination Figures 1 to 9 As shown, this utility model proposes a leakage detection device for coal mine goaf areas. This device can achieve real-time and accurate calculation of the leakage volume of goaf areas at different burial depths by detecting the release and collection of tracer gas, thereby improving detection efficiency and reliability and enhancing the safety of the mine ventilation system. The leakage detection device mainly includes a gas storage tank 1, a gas pipeline 2, a first telescopic pipe 5, a second telescopic pipe 6, and an infrared gas sensor 7, among other related structural components.

[0020] Combination Figure 9 As shown, the first telescopic pipe 5 and the second telescopic pipe 6 are both horizontally installed inside the return airway c of the goaf a, and are connected to the side wall of the return airway c by the support 9. The support 9 plays a role in fixing and supporting, ensuring that the first telescopic pipe 5 and the second telescopic pipe 6 remain stable during operation and will not shake or shift due to external factors, thereby ensuring the normal operation of the entire leakage detection device and providing a stable working environment for subsequent leakage measurement.

[0021] Combination Figure 1 and Figure 2 As shown, the gas storage tank 1 contains sulfur hexafluoride tracer gas. This gas is characterized by its low reactivity with other substances and its stable chemical properties. It can exist stably in the complex goaf environment a, providing a reliable guarantee for accurate detection of air leakage.

[0022] Combination Figure 1 and Figure 2 As shown, the outlet of the gas storage tank 1 is connected to the inlet of the gas pipeline 2, and the gas pipeline 2 is equipped with a release valve 31 and a flow controller 32. By cooperating with the release valve 31 and the flow controller 32, the timing of the release of the tracer gas can be controlled and the release flow rate of the tracer gas can be precisely adjusted to ensure that the amount of tracer gas released each time meets the detection requirements.

[0023] Combination Figure 2 As shown, the outlet end of the gas pipeline 2 extends into the interior of the first telescopic pipe 5. The nozzle 21 of the gas pipeline 2 is connected to the end of the first telescopic pipe 5. Through the coordinated movement of the telescopic arms inside the first telescopic pipe 5, the outlet end of the gas pipeline 2 can be moved laterally along the extension direction of the return airway c of the goaf a, thereby releasing the tracer gas to different positions in the return airway c of the goaf a.

[0024] Combination Figure 3 As shown, an infrared gas sensor 7 is installed at the end of the second telescopic pipe 6. When the tracer gas diffuses with the leaking air in the goaf a, the infrared gas sensor 7 collects the airflow and tracer gas concentration in the goaf in real time, detecting changes in the tracer gas concentration. Similarly, through the coordinated movement of its internal telescopic arms, the second telescopic pipe 6 can move the infrared gas sensor 7 laterally along the extension direction of the return airway c in the goaf a, allowing the infrared gas sensor 7 to reach different positions in the return airway c of the goaf a to collect and detect the released tracer gas.

[0025] Combination Figure 2 As shown, the leakage detection device of this utility model is also equipped with a controller 4, which is connected to the control terminals of the drive motor 523, the release valve 31, and the flow controller 32 via a data cable. In actual operation, the operator uses the controller 4 to precisely control the start, stop, and speed of the drive motor 523, thereby adjusting the extension length and speed of the first telescopic pipe 5 and the second telescopic pipe 6. Simultaneously, the controller 4 can also control the opening and closing of the release valve 31 and adjust the release amount of tracer gas by the flow controller 32, ensuring that the tracer gas is released into the goaf a at an appropriate flow rate. This device can intelligently adjust the release amount and timing based on real-time monitoring data and airflow conditions, achieving uniform distribution of the tracer gas and simulating airflow movement.

[0026] Combination Figure 3 and Figure 8 As shown, the leakage detection device of this utility model is also equipped with an explosion-proof box 8. The explosion-proof box 8 contains a data processing and calculation module 81, a data transmission module 82, and a battery module 83. Among them, the infrared gas sensor 7 is connected to the data processing and calculation module 81. When the infrared gas sensor 7 collects the data of the tracer gas, it will transmit it to the data processing and calculation module 81. The data processing and calculation module 81 analyzes and processes the collected airflow parameters and gas concentration information based on the dilution diffusion model or the inversion ventilation volume calculation method, identifies the leakage location, predicts the leakage trend, and obtains the leakage volume at different locations in the goaf a.

[0027] Combination Figure 3 and Figure 8 As shown, the data processing and calculation module 81 is connected to the controller 4 via the data transmission module 82, feeding back the calculation results to the controller 4. Based on the analysis results and real-time monitoring data, the extension length of the telescopic pipe and the release amount of tracer gas are controlled. The battery module 83 provides power to the data processing and calculation module 81, the data transmission module 82, and other structural components, ensuring stable operation of the device in special environments such as goaf area a. A warning light 84 is installed on the outside of the explosion-proof box 8. When the device malfunctions or an abnormality is detected, the warning light 84 will illuminate, reminding personnel to take appropriate measures to handle the situation promptly.

[0028] In summary, the sulfur hexafluoride tracer gas stored in the gas storage tank 1 is released through the gas pipeline 2 and diffuses to different locations deep within the return airway c of the goaf a. The second telescopic pipe 6 can move the infrared gas sensor 7 to detect the concentration of the tracer gas in the goaf a in real time. The infrared gas sensor 7 transmits the detected data to the data processing and calculation module 81 inside the explosion-proof box 8. The data processing and calculation module 81 processes and calculates the data to obtain the air leakage at different locations in the goaf a. The data transmission module 82 transmits the processed data to the controller 4. The controller 4 controls the release valve 31 and the flow controller 32 based on the received data to adjust the release amount and speed of the tracer gas, thereby achieving more accurate air leakage detection.

[0029] Specifically, combined Figure 4 and Figure 5 As shown, the first telescopic pipe 5 mainly includes structural components such as a first telescopic arm 51, a second telescopic arm 52, a third telescopic arm 53, and a fourth telescopic arm 54. The telescopic arms are connected by mechanical structures such as gears and racks to achieve the telescopic function. Among them, the top plate and bottom plate of the first telescopic arm 51 are symmetrically provided with a first rack 511 and a first slider groove 512, which can provide a basic track for the sliding and transmission of the subsequent telescopic arms.

[0030] Combination Figure 6 As shown, the top and bottom plates of the second telescopic arm 52 are symmetrically equipped with a second rack 521, a first slider 522, a drive motor 523, a drive gear 524, and a first driven gear 525. The first slider 522 is slidably connected to the first slider groove 512, and the output shaft of the drive motor 523 is connected to the drive gear 524, which meshes with the first rack 511. During actual operation, the drive motor 523 starts, causing the drive gear 524 to rotate. Since the drive gear 524 meshes with the first rack 511 on the first telescopic arm 51, the rotation of the drive gear 524 pushes the second telescopic arm 52 to slide within the first slider groove 512 of the first telescopic arm 51, thereby achieving the telescopic action.

[0031] Combination Figure 7 As shown, the top and bottom plates of the third telescopic arm 53 are symmetrically equipped with a third rack 531, a second slider groove 532, a second driven gear 533, and a third driven gear 534. The first slider 522 is slidably connected to the second slider groove 532, and the second driven gear 533 meshes with the second rack 521. Since the second rack 521 on the second telescopic arm 52 meshes with the second driven gear 533 on the third telescopic arm 53, when the second telescopic arm 52 extends or retracts, it drives the third telescopic arm 53 to extend or retract through the sliding engagement of the second slider groove 532 with the first slider 522 on the second telescopic arm 52. A third slide rail groove 535 is provided on the side wall of the third telescopic arm 53 to provide a track for the sliding of the fourth telescopic arm 54.

[0032] Combination Figure 7 As shown, the top and bottom plates of the fourth telescopic boom 54 are symmetrically equipped with fourth racks 541. A third driven gear 534 meshes with the fourth rack 541, and a second slider 542 is provided on the side wall of the fourth telescopic boom 54, slidably connected to the third slide rail groove 535. During actual operation, when the third telescopic boom 53 extends or retracts, the meshing of the third driven gear 534 with the fourth rack 541 on the fourth telescopic boom 54 causes the fourth telescopic boom 54 to slide within the third slide rail groove 535 via the second slider 542, thus achieving the extension and retraction of the fourth telescopic boom 54. Through the coordinated work of each telescopic boom section, the first telescopic pipe 5 can drive the outlet end of the gas pipe 2 to move laterally along the extension direction of the return airway c in the goaf a, to meet the tracer gas release requirements at different locations.

[0033] Combination Figure 1 and Figure 3As shown, the second telescopic pipe 6 has the same structural arrangement as the first telescopic pipe 5, also consisting of multiple telescopic arms. The telescopic arms are connected by mechanical structures such as gears and racks to achieve the telescopic function. An infrared gas sensor 7 is installed at the end of the second telescopic pipe 6. The second telescopic pipe 6 can drive the infrared gas sensor 7 to move laterally along the extension direction of the return airway c of the goaf a, thereby detecting the tracer gas concentration at different locations in the goaf a and accurately collecting tracer gas data at different locations.

[0034] Combination Figure 1 As shown, the preset extension length of the first telescopic pipe 5 is greater than the preset extension length of the second telescopic pipe 6. The longer preset extension length of the first telescopic pipe 5 is used to release sulfur hexafluoride tracer gas into the depth of the goaf a, while the shorter preset extension length of the second telescopic pipe 6 is used to collect shallow mixed gas samples from the goaf a and detect the sulfur hexafluoride concentration therein. This design allows the tracer gas to diffuse more widely into different areas deep within the goaf a, while the infrared gas sensor 7 can collect gas data within a suitable range, ensuring the accuracy and comprehensiveness of the detection.

[0035] This invention proposes a leakage detection device for coal mine goaf areas. The device releases sulfur hexafluoride tracer gas into the depths of goaf area a through a first telescopic pipe 5, which drives the outlet of gas pipeline 2. A second telescopic pipe 6 drives an infrared gas sensor 7 to collect a sample of the mixed gas in the shallow part of goaf area a. This airflow and tracer gas concentration information is transmitted to a data processing and calculation module 81, which accurately and in real-time calculates the leakage volume at different depths within the goaf, improving detection efficiency and accuracy and providing solid data support for the scientific control of the ventilation system. Furthermore, the design of this device fully considers the complex and variable environmental factors of the goaf area. The coordinated operation of all components is stable and reliable, ensuring the normal operation of the device under harsh conditions. This leakage detection device is of great significance for improving the overall safety of the mine and ensuring safe production in coal mines.

[0036] Of course, the above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model and should be protected by the present utility model.

Claims

1. A device for detecting air leakage in coal mine goaf areas, characterized in that, It includes a gas storage tank, gas pipelines, a first telescopic pipe, a second telescopic pipe, and an infrared gas sensor; The first and second expansion pipes are both horizontally installed inside the return airway of the goaf. The gas storage tank contains sulfur hexafluoride tracer gas. The gas outlet of the gas storage tank is connected to the gas inlet of the gas pipeline. The gas pipeline is equipped with a release valve and a flow controller. The gas outlet of the gas pipeline extends into the interior of the first telescopic pipe and is connected to the end of the first telescopic pipe. The first telescopic pipe can drive the gas outlet of the gas pipeline to move laterally along the extension direction of the return airway of the goaf. The infrared gas sensor is installed at the end of the second telescopic pipe, and the second telescopic pipe can drive the infrared gas sensor to move laterally along the extension direction of the return airway in the goaf.

2. The air leakage detection device for coal mine goaf according to claim 1, characterized in that, The first telescopic pipe includes a first telescopic arm, a second telescopic arm, a third telescopic arm, and a fourth telescopic arm; The top plate and bottom plate of the first telescopic arm are symmetrically provided with a first rack and a first slider groove; The top and bottom plates of the second telescopic boom are symmetrically provided with a second rack, a first slider, a drive motor, a drive gear, and a first driven gear; wherein, the first slider is slidably connected to the first slider groove, and the output shaft of the drive motor is connected to the drive gear, and the drive gear meshes with the first rack; The top and bottom plates of the third telescopic arm are symmetrically provided with a third rack, a second slider groove, a second driven gear, and a third driven gear; wherein, the first slider is slidably connected to the second slider groove, and the second driven gear meshes with the second rack; the side wall of the third telescopic arm is provided with a third slide rail groove. The top and bottom plates of the fourth telescopic arm are symmetrically provided with a fourth rack, the third driven gear meshes with the fourth rack, and the side wall of the fourth telescopic arm is provided with a second slider, which is slidably connected to the third slide rail groove.

3. A device for detecting air leakage in a coal mine goaf according to claim 2, characterized in that, The structural layout of the second telescopic pipe is the same as that of the first telescopic pipe.

4. A device for detecting air leakage in a coal mine goaf according to claim 2, characterized in that, The preset extension length of the first telescopic pipe is greater than the preset extension length of the second telescopic pipe.

5. A device for detecting air leakage in a coal mine goaf according to claim 2, characterized in that, It is also equipped with a controller, which is connected to the control terminals of the drive motor, release valve and flow controller via data cables.

6. A device for detecting air leakage in a coal mine goaf according to claim 5, characterized in that, An explosion-proof box is also provided, which contains a data processing and calculation module, a data transmission module, and a battery module. The infrared gas sensor is connected to the data processing and calculation module, which is used to process and calculate the data measured by the infrared gas sensor. The data processing and calculation module is connected to the controller through the data transmission module. The battery module provides power to the data processing and calculation module and the data transmission module.

7. A device for detecting air leakage in a coal mine goaf according to claim 6, characterized in that, The explosion-proof box is equipped with a warning light on its outside.

8. A device for detecting air leakage in a coal mine goaf according to claim 1, characterized in that, Both the first and second telescopic pipes are connected to the sidewall of the return airway in the goaf via supports.

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