A portable equipment for measuring concentration of gas in a gob

Abstract

The application relates to a portable goaf gas concentration measuring device, which comprises an air suction pump, a gas analyzer and a probe rod; the air suction pump, the gas analyzer and the probe rod are independent structures; the probe rod is a hollow structure, one end of the probe rod is provided with a joint, and the other end of the probe rod is provided with a gas suction port; the air suction pump comprises a self-suction pump and a self-suction pump display screen; the self-suction pump is provided with a self-suction pump air inlet and a self-suction pump air outlet; the self-suction pump display screen is arranged on the self-suction pump and is electrically connected with the self-suction pump; the gas analyzer is provided with an analyzer air inlet, a gas detection component and an analyzer display screen; the probe rod can be detachably connected with the self-suction pump air inlet through the joint and is in conduction; the self-suction pump air outlet can be detachably connected with the analyzer air inlet through a connecting pipe and is in conduction; and the analyzer display screen is electrically connected with the gas analyzer. The scheme provided by the utility model can directly and accurately detect the harmful gas concentration of a goaf, is convenient to carry and is simple to operate.

Description

Technical Field

[0001] This application relates to a portable gas concentration measuring device for underground goaf areas, applicable to the technical field of gas concentration measurement. Background Technology

[0002] Driven by science and technology, fully mechanized longwall mining has been widely used in thick coal seam mining for a long time. This mining process easily achieves high production and efficiency in mines. Thick and extra-thick coal seams mined using fully mechanized longwall mining are generally thicker than the roadway height, and the roadways are generally excavated along the floor, leaving a considerable thickness of coal roof. However, during the mining of thick coal seams, due to objective factors, the surface is severely damaged. Fissures connect the surface subsidence area and the underground goaf, leading to severe air leakage, which is detrimental to underground ventilation. It also affects the distribution of the three spontaneous combustion zones in the goaf. During mining, roof collapse can occur due to top coal caving, stress concentration, or coal body fracturing. Toxic and harmful gases from the goaf, under pressure, can surge to the upper corner of the working face, creating safety hazards and leading to the release of toxic and harmful gases or spontaneous combustion of residual coal in the goaf. As mine recoverable reserves decrease year by year and goaf areas gradually increase, the prevention and control of gas in goaf areas, especially in thick coal seams with high gas content and large dip angle changes, is of great significance. Adopting appropriate gas concentration detection methods for goaf areas is particularly important for gas treatment. Therefore, developing a device that is both portable and reduces workload while accurately measuring gas concentration in goaf areas is of great importance for the prevention and control of gas in goaf areas. Summary of the Invention

[0003] The purpose of this application is to design a portable underground goaf gas concentration measuring device, which aims to solve the existing problems of underground goaf gas concentration measurement and can be easily carried and assembled.

[0004] This application relates to a portable downhole goaf gas concentration measuring device, which includes a pump, a gas analyzer, and a probe. The pump, gas analyzer, and probe are all independent structures. The probe is hollow, with an interface at one end and a suction port at the other. The pump includes a self-priming pump and a display screen. The self-priming pump has an inlet and an outlet. The display screen is mounted on and electrically connected to the self-priming pump to display its operating functions. The gas analyzer has an inlet, a gas detection component, and a display screen. The probe can be detachably connected to and conduct through the inlet of the self-priming pump via the interface. The outlet of the self-priming pump can be detachably connected to and conduct through the inlet of the analyzer via a connecting pipe. The display screen is electrically connected to the gas analyzer to display gas detection data.

[0005] In some embodiments, the probe is a stainless steel probe; the interface is a convex interface, and the self-priming pump air inlet is a concave air inlet; the convex interface and the concave air inlet are compatible and can be connected by threads.

[0006] In some embodiments, the connecting tube is a rubber hose; the analyzer inlet is a convex interface, the self-priming pump outlet is a convex outlet, and the two ends of the rubber hose are concave interfaces; the concave interfaces are adapted to the convex interface and the convex outlet respectively, and can be connected by threads.

[0007] In some embodiments, the self-priming pump is housed in an explosion-proof box, which is a metal box; the explosion-proof box also contains a lithium battery, which is electrically connected to the self-priming pump.

[0008] In some implementations, the lithium battery is also electrically connected to a self-priming pump display screen, which includes a power level button, a power switch, and a charging port.

[0009] In some embodiments, the gas analyzer is also equipped with a lithium battery, which is electrically connected to the gas detection component and the analyzer display screen respectively; the casing of the lithium battery is a rubber box.

[0010] In some embodiments, the gas detection component includes a methane sensor, an oxygen sensor, a carbon monoxide sensor, a nitrogen sensor, an ethylene sensor, and a carbon dioxide sensor.

[0011] In some embodiments, the gas analyzer includes a detection box, in which a gas detection component is disposed; the analyzer inlet is disposed on the side of the detection box.

[0012] In some implementations, the analyzer display screen is equipped with analyzer operation buttons and a charging port; the gas analyzer is also equipped with a high concentration alarm window and a low concentration alarm window.

[0013] In some implementations, the outer diameter of the probe is 10 mm and the inner diameter is 8 mm.

[0014] This application proposes a portable device for measuring gas concentration in underground goaf areas, which has the following advantages: 1. The measuring device proposed in this utility model can directly and accurately detect the concentration of harmful gases in the underground goaf.

[0015] 2. The measuring device proposed in this utility model can provide early warnings based on the test data, ensuring that underground workers can operate in a safe environment.

[0016] 3. The measuring device proposed in this utility model is easy to carry and simple to operate, and can be widely used to enhance the safety awareness of construction personnel.

[0017] 4. The measuring device proposed in this utility model is precise and durable, has a long standby time, and a fast detection speed, which can save a lot of time and can achieve real-time monitoring. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the probe structure in this application;

[0019] Figure 2 This is a schematic diagram of the air pump of this application;

[0020] Figure 3 This is a schematic diagram of the gas analyzer described in this application;

[0021] Figure 4 This is a schematic diagram of a portable underground goaf gas concentration measuring device according to this application.

[0022] In the diagram: 1-Probe; 2-Interface; 3-Self-priming pump inlet; 4-Self-priming pump display screen; 5-Increase power setting button; 6-Self-priming pump; 7-Self-priming pump outlet; 8-Decrease power setting button; 9-Switch button; 10-Charging port; 11-High concentration alarm window; 12-Name of the gas being detected; 13-Current concentration value of the gas being detected; 14-OK button; 15-Analyzer inlet; 16-Detection box; 17-Menu button; 18-Return button; 19-Unit of the gas being detected; 20-Analyzer display screen; 21-Low concentration alarm window. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other. Those skilled in the art will understand that this portable underground goaf gas concentration measuring device can be assembled to measure the gas concentration in mine goaf areas.

[0024] like Figure 1-4As shown, this application proposes a portable underground goaf gas concentration measuring device, which includes a vacuum pump, a gas analyzer, and a probe 1. The vacuum pump, gas analyzer, and probe 1 are independent structures that can be assembled together for measurement and can also be disassembled for transport. The vacuum pump is used to extract gas from the goaf and is small and easy to carry. The gas analyzer is used to measure and analyze the gas in the goaf and can be directly taken underground for monitoring, providing high accuracy in real-time. The probe 1 has a hollow structure, with an interface 2 at one end and a suction port at the other end. The vacuum pump includes a self-priming pump 6 and a self-priming pump display screen 4. The self-priming pump 6 has a self-priming pump inlet 3 and a self-priming pump outlet 7. The self-priming pump display screen 4 is mounted on the self-priming pump 6 and electrically connected to it to display the operating functions of the self-priming pump 6. The gas analyzer has an analyzer inlet 15, a gas detection component, and an analyzer display screen 20. Specifically, probe 1 can be detachably connected and energized to the self-priming pump inlet 3 via interface 2; the self-priming pump outlet 7 can be detachably connected and energized to the analyzer inlet 15 via connecting pipe; the analyzer display screen 20 is electrically connected to the gas analyzer to display gas detection data. The portable underground goaf gas concentration measuring device proposed in this utility model can directly and accurately detect the concentration of harmful gases in underground goafs, providing early warnings and ensuring that underground workers operate in a safe environment; it is easy to carry and assemble, and simple to operate, allowing for widespread adoption and enhancing the safety awareness of construction personnel; it is precise and durable, has a long standby time, and a fast detection speed, saving a significant amount of time, and can achieve real-time monitoring.

[0025] like Figure 1 As shown, in some embodiments, the probe 1 is a stainless steel probe, which is less prone to corrosion when extracting various gases in the mine. Furthermore, the interface 2 is a convex interface, and the self-priming pump inlet 3 is a concave inlet; the convex interface and the concave inlet are compatible and can be connected by threads. Specifically, the convex part of the convex interface can be inserted into the recess of the concave inlet to achieve insertion, and the convex interface and the concave inlet are connected by threads, making disassembly and assembly convenient and providing good airtightness.

[0026] like Figure 1-4 As shown, in some embodiments, the connecting tube is a rubber hose, the length of which can be 25cm to 35cm, preferably 30cm. The analyzer inlet 15 is a convex interface, the self-priming pump outlet 7 is a convex outlet, and both ends of the rubber hose are concave interfaces; the concave interfaces are adapted to the convex interface and the convex outlet respectively, and can be connected by threads. Specifically, the convex part of the convex interface can be inserted into the concave opening of the concave interface to achieve insertion. Similarly, the convex interface and the concave interface are connected by threads, which is convenient for disassembly and assembly and has good airtightness.

[0027] like Figure 1-4As shown, in some embodiments, the self-priming pump 6 is housed within an explosion-proof box, and the voltage of the self-priming pump 6 is 3.8V. The explosion-proof box can be a metal box. A 2000mAh lithium battery is also installed inside the explosion-proof box, and the lithium battery is electrically connected to the self-priming pump 6 to provide power. The lithium battery has a flow rate of 600-800 ml / min, and its shape is a cuboid structure with a cross-section of 150mm × 80mm and a thickness of 20mm. The outer shell is made of explosion-proof metal material.

[0028] like Figure 1-4 As shown, in some embodiments, the lithium battery is also electrically connected to the self-priming pump display screen 4; the self-priming pump display screen 4 is provided with a power level button, a power switch button 9, and a charging port 10; wherein, the power level button includes an increase power level button 5 and a decrease power level button 8. The self-priming pump display screen 4 is a cuboid explosion-proof liquid crystal display with a cross-section of 40mm × 35mm and a thickness of 20mm.

[0029] like Figure 1-4 As shown, in some embodiments, the gas analyzer is also equipped with a lithium battery, which is electrically connected to the gas detection component and the analyzer display screen 20 respectively; the outer casing of the lithium battery is a rubber box, which is an explosion-proof rubber box.

[0030] like Figure 1-4 As shown, in some embodiments, the gas detection component is a multifunctional gas analysis device, which specifically includes a methane sensor, an oxygen sensor, a carbon monoxide sensor, a nitrogen sensor, an ethylene sensor, and a carbon dioxide sensor, enabling the detection of the corresponding gases.

[0031] like Figure 1-4 As shown, in some embodiments, the gas analyzer includes a detection box 16, in which gas detection components are disposed; the analyzer inlet 15 is disposed on the side of the detection box 16 and is connected to each gas detection component to realize detection.

[0032] like Figure 1-4 As shown, in some embodiments, the analyzer display screen 20 is a rectangular explosion-proof LCD display with a cross-section of 50mm × 45mm and a thickness of 20mm. The analyzer display screen 20 is equipped with analyzer operation buttons and a charging port. The analyzer operation buttons include a return button 18, an confirm button 14, and a menu button 17; the middle screen of the analyzer display screen 20 can display the names of various gases and their corresponding detection concentration values ​​and units; the entire gas analyzer weighs 400g, making it easy to carry and highly sensitive; the gas analyzer is also equipped with a high-concentration alarm window 11 and a low-concentration alarm window 21 to realize alarm functions.

[0033] like Figure 1-4As shown, in some embodiments, the outer diameter of the probe rod 1 is 10 mm and the inner diameter of the probe rod 1 is 8 mm. This size design takes into account the effective space for underground detection and facilitates gas detection.

[0034] The portable underground goaf gas concentration measuring device proposed in this application connects a gas pump and a gas analyzer via a hose. First, the gas pump is turned on and its power adjusted. Once the gas pressure displayed on the analyzer's screen 20 stabilizes, the gas analyzer is then turned on. After the gas analyzer is turned on, the gas drawn from the outside by the gas pump directly enters the gas detection component for analysis. After the gas data on the analyzer's screen 20 stabilizes, pressing the menu button 17 in the middle of the screen allows users to select and view specific data for the corresponding gas. After viewing a gas, pressing the return button 18 allows users to select and view specific data for other gases. The gas pump and gas analyzer are connected by a hose. The gas pump draws gas into the pump through a stainless steel probe and then delivers it to the gas analyzer through the connected hose. This allows for simultaneous gas extraction and detection, enabling real-time on-site monitoring that is simple, convenient, and provides accurate data.

[0035] This application proposes a portable device for measuring gas concentration in underground goaf areas, which has the following advantages: 1. The measuring device proposed in this utility model can directly and accurately detect the concentration of harmful gases in the underground goaf.

[0036] 2. The measuring device proposed in this utility model can provide early warnings based on the test data, ensuring that underground workers can operate in a safe environment.

[0037] 3. The measuring device proposed in this utility model is easy to carry and simple to operate, and can be widely used to enhance the safety awareness of construction personnel.

[0038] 4. The measuring device proposed in this utility model is precise and durable, has a long standby time, and a fast detection speed, which can save a lot of time and can achieve real-time monitoring.

[0039] Although the embodiments disclosed in this application are as described above, the content is merely for the purpose of facilitating understanding of this application and is not intended to limit this application. Any person skilled in the art to which this application pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this application; however, the scope of patent protection of this application shall still be determined by the scope defined in the appended claims.

Claims

1. A portable device for measuring gas concentration in underground goaf areas, characterized in that, The measuring device includes a vacuum pump, a gas analyzer, and a probe (1); the vacuum pump, the gas analyzer, and the probe (1) are all independent structures; the probe (1) is a hollow structure, with an interface (2) at one end and an air intake at the other end; the vacuum pump includes a self-priming pump (6) and a self-priming pump display screen (4); the self-priming pump (6) has a self-priming pump inlet (3) and a self-priming pump outlet (7); the self-priming pump display screen (4) is mounted on the self-priming pump (6). It is electrically connected to the self-priming pump (6) to display the operating function of the self-priming pump (6); the gas analyzer is provided with an analyzer inlet (15), a gas detection component and an analyzer display screen (20); the probe (1) can be detachably connected and connected to the self-priming pump inlet (3) through the interface (2); the self-priming pump outlet (7) can be detachably connected and connected to the analyzer inlet (15) through a connecting pipe; the analyzer display screen (20) is electrically connected to the gas analyzer to display gas detection data.

2. The portable underground goaf gas concentration measuring device according to claim 1, characterized in that, The probe (1) is a stainless steel probe; the interface (2) is a convex interface, and the self-priming pump inlet (3) is a concave inlet; the convex interface and the concave inlet are compatible and can be connected by threads.

3. The portable underground goaf gas concentration measuring device according to claim 1, characterized in that, The connecting tube is a rubber tube; the air inlet (15) of the analyzer is a convex interface, the air outlet (7) of the self-priming pump is a convex air outlet, and the two ends of the rubber tube are concave interfaces respectively; the concave interfaces are adapted to the convex interface and the convex air outlet respectively, and can be connected by threads.

4. The portable underground goaf gas concentration measuring device according to claim 1, characterized in that, The self-priming pump (6) is installed in an explosion-proof box, which is a metal box; a lithium battery is also installed in the explosion-proof box, and the lithium battery is electrically connected to the self-priming pump (6).

5. The portable underground goaf gas concentration measuring device according to claim 4, characterized in that, The lithium battery is also electrically connected to the self-priming pump display screen (4); the self-priming pump display screen (4) is provided with a power level button, a switch button (9) and a charging port (10).

6. The portable underground goaf gas concentration measuring device according to any one of claims 1 to 5, characterized in that, The gas analyzer is also equipped with a lithium battery, which is electrically connected to the gas detection component and the analyzer display screen (20); the outer shell of the lithium battery is a rubber box.

7. The portable underground goaf gas concentration measuring device according to any one of claims 1 to 5, characterized in that, The gas detection components include a methane sensor, an oxygen sensor, a carbon monoxide sensor, a nitrogen sensor, an ethylene sensor, and a carbon dioxide sensor.

8. The portable underground goaf gas concentration measuring device according to any one of claims 1 to 5, characterized in that, The gas analyzer includes a detection box (16), and the gas detection component is disposed inside the detection box (16); the analyzer inlet (15) is disposed on the side of the detection box (16).

9. The portable underground goaf gas concentration measuring device according to any one of claims 1 to 5, characterized in that, The analyzer display screen (20) is equipped with analyzer operation buttons and a charging port; the gas analyzer is also equipped with a high concentration alarm window (11) and a low concentration alarm window (21).

10. The portable underground goaf gas concentration measuring device according to any one of claims 1 to 5, characterized in that, The outer diameter of the probe (1) is 10 mm, and the inner diameter of the probe (1) is 8 mm.

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