Gas production device for coal spontaneous combustion and gas symbiosis quantitative risk monitoring

Abstract

The utility model discloses a gas production device for coal spontaneous combustion and gas symbiosis quantitative risk monitoring. The gas production device comprises a gas collection device and a gas extraction and sealing device, the gas collecting device comprises a first fixing end, a second fixing end, a limiting pipe, a gas collecting bag and a plurality of flexible supporting rods. The air exhaust and sealing device comprises a rotating rod and two rotating air doors, when the rotating rod rotates with the axis as the axis, the two rotating air doors can be driven to rotate synchronously, and synchronous opening or closing of the two ventilation grooves is achieved; when the second fixing end is fixed and the rotating rod axially moves, the rotating air door of the first fixing end is pulled, then the first fixing end is driven to get close to the second fixing end, and at the moment, all the flexible supporting rods are bent to enable the air collecting bag to expand until the adjustable ventilation pipe reaches the limiting groove and extends into the limiting groove. Gas at the corresponding position of the goaf can be quantitatively collected and stored at a fixed point according to monitoring requirements, subsequent accurate detection is facilitated, and therefore mine construction safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of mine harmful gas detection, in particular to a gas extraction device used for quantitative risk monitoring of coal spontaneous combustion and gas symbiosis. Background Art

[0002] Coal seams naturally contain combustible gases and heat-generating reactions, which, under certain conditions, can lead to dangerous fires and explosions in mines. As the need to effectively detect, quantify, and mitigate these risks grows, advanced monitoring technologies are crucial to safeguarding miners' lives and the integrity of mining infrastructure. In mines where spontaneous coal combustion and gas coexist, it's crucial to monitor the concentrations of multiple gases, including oxygen, carbon monoxide, and methane. Consequently, gas collection and detection require ever-greater precision.

[0003] Current underground gas detection methods are relatively simple. They usually use instruments directly connected to pre-buried gas pipes for detection, or collect gas through the gas pipes to the ground and use professional instruments for detection. However, these methods cannot avoid the situation in the goaf that the collected gas does not match the actual situation due to airflow or cracks during the gas collection process. Therefore, how to provide a new device that can collect gas at the corresponding position of the goaf according to monitoring needs and conduct accurate detection, thereby ensuring mine construction safety, is the technical problem that the utility model needs to solve. Utility Model Content

[0004] In response to the problems existing in the above-mentioned existing technologies, the utility model provides a gas extraction device for quantitative risk monitoring of coal spontaneous combustion and gas symbiosis. According to monitoring needs, it can collect gas at corresponding positions in the goaf at fixed points and in fixed quantities for precise detection, thereby ensuring mine construction safety.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is: a gas extraction device for quantitative risk monitoring of coal spontaneous combustion and gas symbiosis, comprising a gas collecting device and a gas extraction and sealing device;

[0006] The air collecting device is composed of a support and adjustment device and an air collecting bag. The support and adjustment device includes a first fixed end, a second fixed end, a limiting tube and a plurality of flexible support rods. The limiting tube is located between the first fixed end and the second fixed end, and one end of the limiting tube is fixedly connected to the second fixed end. The plurality of flexible support rods are distributed around the limiting tube, and both ends of each flexible support rod are respectively fixedly connected to the first fixed end and the second fixed end. The air collecting bag covers each flexible support rod and the limiting tube inside it, and the upper and lower ends of the air collecting bag are respectively sealed with the first fixed end and the second fixed end.

[0007] The exhaust and sealing device includes a rotating rod and two rotating dampers. A ventilation slot is provided at the first fixed end and the second fixed end. The two rotating dampers are respectively installed at the two ventilation slots. Each rotating damper is provided with a rotating groove. One end of the rotating rod passes through the limiting tube and the two rotating grooves. When the rotating rod rotates around the axis, it can drive the two rotating dampers to rotate synchronously, thereby realizing the synchronous opening or closing of the two ventilation slots.

[0008] One end of the rotating rod is fixedly connected to the rotating damper of the first fixed end. The rotating rod is a hollow rod. An adjustable ventilation tube is installed on the side of the rotating rod. One end of the adjustable ventilation tube is connected to the interior of the rotating rod, and the other end is provided with a ventilation hole connected to the interior of the air collecting bag. A limiting groove is provided on the side of the limiting tube. When the second fixed end is fixed and the rotating rod is moved axially, the rotating damper of the first fixed end is subjected to tension, which drives the first fixed end toward the second fixed end. At this time, each flexible support rod bends to expand the air collecting bag until the adjustable ventilation tube reaches the limiting groove and extends into it, completing the deployment of the air collecting bag.

[0009] Furthermore, a spring is installed inside the rotating rod, and one end of the adjustable vent tube extends into the rotating rod and is connected to the spring, allowing the adjustable vent tube to expand and contract relative to the side of the rotating rod. When the air bag is deployed, the adjustable vent tube is retracted within the limiting tube until it reaches the limiting groove, where it is extended into the limiting groove by the spring force, thereby limiting the axial position of the rotating rod. This device ensures that the air bag maintains its shape after deployment.

[0010] Furthermore, the flexible support rod is made of carbon fiber, which is high-strength, lightweight, durable, and tough; it is easy to bend and can be restored to a vertical state in time when the airbag is folded.

[0011] Furthermore, the limiting groove is a strip-shaped hole formed along the circumference of the limiting tube, and is used to move the adjustable vent tube within the strip-shaped hole when the rotating rod rotates. In this way, the adjustable vent tube does not affect the rotation of the rotating rod, ensuring the adjustment process of the rotary damper.

[0012] Furthermore, the rotating rod is a square hollow tube, the rotating groove is a square opening, and the rotating groove and the square hollow tube match each other, which makes it easier for the rotating rod to adjust the rotating damper.

[0013] Compared with the existing technology, the utility model adopts a combination of gas collecting device and gas extraction and sealing device, which has the following advantages:

[0014] 1. The utility model is placed at the required position in the goaf, and can realize the fixed-point, quantitative and stable collection of internal gas. After completing the collection at the collection time point, the gas collected at the corresponding position and time point can be retained in the gas collecting bag. In this way, when gas detection is required in the future, it is only necessary to extract the gas enclosed inside the collection bag (that is, the gas collected at the required time point), effectively avoiding the interference of gas in other gaps on the detection results during gas extraction, and ensuring the accuracy of the gas detection results.

[0015] 2. The utility model has a simple mechanical structure, which makes it easy to use during operation and can extract the same amount of gas for detection at the same position each time. In addition, there is no power system, which makes it safer when used in mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the utility model air bag in an unexpanded state;

[0018] Figure 3 It is a partial schematic diagram of the limit tube and the rotating rod in the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the second fixed end in the present utility model;

[0020] Figure 5 This is a schematic diagram of the connection between the rotating rod and the first fixed end in the present invention.

[0021] In the figure: 1: flexible support rod; 2: adjustable ventilation tube; 3: ventilation hole; 4: first fixed end; 5: rotary damper; 6: limiting tube; 7: rotating rod; 8: second fixed end; 9: rotating groove; 10: sealing strip; 11: air collecting bag. DETAILED DESCRIPTION

[0022] The utility model will be further described below.

[0023] like Figure 1 and 2 As shown, the utility model includes an air collecting device and an air extraction and sealing device;

[0024] The air collecting device is composed of a supporting and adjusting device and an air collecting bag 11. The supporting and adjusting device includes a first fixed end 4, a second fixed end 8, a limiting tube 6 and a plurality of flexible support rods 1. The limiting tube 6 is located between the first fixed end 4 and the second fixed end 8, and one end of the limiting tube 6 is fixedly connected to the second fixed end 8. At the same time, a certain distance is left between the other end of the limiting tube 6 and the first fixed end 4. A plurality of flexible support rods 1 are distributed around the limiting tube 6, and the two ends of each flexible support rod 1 are respectively fixedly connected to the first fixed end 4 and the second fixed end 8. The air collecting bag 11 covers each flexible support rod 1 and the limiting tube 6 inside it, and the upper and lower ends of the air collecting bag 11 are respectively sealed with the first fixed end 4 and the second fixed end 8.

[0025] The exhaust and sealing device includes a rotating rod 7 and two rotating dampers 5. The first fixed end 4 and the second fixed end 8 are both provided with ventilation slots. The two rotating dampers 5 are respectively installed at the two ventilation slots. Each rotating damper 5 is provided with a rotating groove 9. Figure 4 and 5 As shown, one end of the rotating rod passes through the limiting tube 6 and the two rotating grooves 9; when the rotating rod 7 rotates around the axis, it can drive the two rotating dampers 5 to rotate synchronously, thereby realizing the synchronous opening or closing of the two ventilation slots; a sealing strip 10 is provided around the rotating damper 5 to improve the sealing of the ventilation slot when closed.

[0026] One end of the rotating rod 7 is fixedly connected to the rotating damper 5 of the first fixed end 4. The rotating rod 7 is a hollow rod. An adjustable vent tube 2 is installed on the side of the rotating rod 7. One end of the adjustable vent tube 2 is connected to the interior of the rotating rod 7, and the other end is provided with a vent hole 3 connected to the interior of the air collecting bag 11. A limiting groove is provided on the side of the limiting tube 6. When the second fixed end 8 is fixed and the rotating rod 7 is moved axially, the rotating damper 5 of the first fixed end 4 is subjected to tension, thereby driving the first fixed end 4 toward the second fixed end 8. At this time, each flexible support rod 1 bends to expand the air collecting bag 11 until the adjustable vent tube 2 reaches the limiting groove and extends into the interior thereof, completing the deployment of the air collecting bag 11. The rotating rod 7 is a square hollow tube, and the rotating groove 9 is a square opening. The rotating groove and the square hollow tube match. This makes it easier for the rotating rod 7 to adjust the rotating damper 5.

[0027] As an improvement of the present invention, Figure 3 As shown, a spring is provided inside the rotating rod 7, and one end of the adjustable vent tube extends into the rotating rod 7 and is connected to the spring, allowing the adjustable vent tube 2 to extend and retract relative to the side of the rotating rod 7. When the air bag 11 is deployed, the adjustable vent tube 2 is retracted within the limiting tube 6 until it reaches the limiting groove. The spring force causes the adjustable vent tube 2 to extend into the limiting groove, thereby limiting the axial position of the rotating rod 7. This device ensures that the air bag 11 maintains its shape after deployment.

[0028] As another improvement to the present invention, the flexible support rod 1 is made of carbon fiber. This material is characterized by high strength, lightness, durability, and good toughness. It is easy to bend and can be promptly restored to a vertical position when the air bag 11 is folded. The limiting groove is a strip-shaped hole formed along the circumference of the limiting tube 6, which is used to move the adjustable vent tube 2 within the strip-shaped hole when the rotating rod 7 rotates. In this way, the adjustable vent tube 2 does not affect the rotation of the rotating rod, ensuring the adjustment process of the rotary damper 5.

[0029] During operation, first place the utility model at the position to be monitored and keep the second fixed end 8 fixed. At this time, pull the rotating rod 7 to move axially, thereby driving the first fixed end 4 toward the second fixed end 8. At this time, each flexible support rod 1 bends to expand the air bag until the adjustable ventilation tube 2 reaches the limiting groove and extends into it. At the same time, the first fixed end 4 contacts the other end of the limiting tube 6 to complete the deployment of the air bag 11; and seal both ends of the rotating rod 7.

[0030] When the required time period for collecting gas is reached, the rotating rod 7 is controlled to rotate about the axis, thereby driving the two rotating dampers 5 to rotate synchronously, thereby realizing the synchronous opening of the two ventilation slots. At this time, the ambient gas enters the air collecting bag 11 through the ventilation slots and is retained in the air collecting bag 11. After completing the gas collection work, the rotating rod 7 is controlled to rotate about the axis again, thereby driving the two rotating dampers 5 to rotate synchronously, thereby realizing the synchronous closing of the two ventilation slots, thereby completing the gas collection work in this time period. At this time, the utility model can be recycled.

[0031] To test the gas collected at desired locations and time points, simply open one end of the rotating rod 7 and connect it to the air pump. When the pump starts, the gas in the gas collection bag 11 enters the rotating rod 7 through the vent 3 on the adjustable vent tube 2 and is collected for testing. Because the gas collected at the desired time point inside the gas collection bag 11 is tested, the presence of surrounding airflow or cracks will not affect the monitoring process, ensuring that the gas tested is the gas corresponding to the desired collection location and time point.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A gas extraction device for quantitative risk monitoring of coal spontaneous combustion and gas co-generation, characterized in that: Including gas collecting device and gas extraction and sealing device; The air collecting device is composed of a supporting and adjusting device and an air collecting bag, the supporting and adjusting device includes a first fixed end, a second fixed end, a limiting tube and a plurality of flexible support rods, the limiting tube is located between the first fixed end and the second fixed end, and one end of the limiting tube is fixedly connected to the second fixed end, the plurality of flexible support rods are distributed around the limiting tube, and the two ends of each flexible support rod are respectively fixedly connected to the first fixed end and the second fixed end, the air collecting bag covers each flexible support rod and the limiting tube inside it, and the upper and lower ends of the air collecting bag are respectively sealed with the first fixed end and the second fixed end; The exhaust and sealing device includes a rotating rod and two rotating dampers. A ventilation slot is provided at each of the first and second fixed ends. The two rotating dampers are respectively installed at the two ventilation slots. Each rotating damper is provided with a rotating groove. One end of the rotating rod passes through the limiting tube and the two rotating grooves. When the rotating rod rotates about the axis, the two rotating dampers can be driven to rotate synchronously, thereby realizing the synchronous opening or closing of the two ventilation slots. One end of the rotating rod is fixedly connected to the rotating damper of the first fixed end. The rotating rod is a hollow rod. An adjustable ventilation tube is installed on the side of the rotating rod. One end of the adjustable ventilation tube is connected to the interior of the rotating rod, and the other end is provided with a ventilation hole connected to the interior of the air collecting bag. A limiting groove is provided on the side of the limiting tube. When the second fixed end is fixed and the rotating rod is moved axially, the rotating damper of the first fixed end is subjected to tension, which drives the first fixed end toward the second fixed end. At this time, each flexible support rod bends to expand the air collecting bag until the adjustable ventilation tube reaches the limiting groove and extends into it, completing the deployment of the air collecting bag.

2. The gas extraction device for quantitative risk monitoring of coal spontaneous combustion and gas symbiosis according to claim 1 is characterized in that: A spring is provided inside the rotating rod, and one end of the adjustable vent tube extends into the rotating rod and is connected to the spring, so that the adjustable vent tube can be extended and retracted relative to the side of the rotating rod; when the air bag is deployed, the adjustable vent tube is in a retracted state in the limiting tube until the adjustable vent tube reaches the limiting groove and is extended into the limiting groove by the elastic force of the spring, thereby limiting the axial position of the rotating rod.

3. The gas extraction device for quantitative risk monitoring of coal spontaneous combustion and gas symbiosis according to claim 1 is characterized in that: The flexible support rod is made of carbon fiber.

4. The gas extraction device for quantitative risk monitoring of coal spontaneous combustion and gas symbiosis according to claim 1 is characterized in that: The limiting groove is a strip-shaped hole, which is opened along the circumference of the limiting tube and is used to move the adjustable vent tube in the strip-shaped hole when the rotating rod rotates.

5. The gas extraction device for quantitative risk monitoring of coal spontaneous combustion and gas symbiosis according to claim 1 is characterized in that: The rotating rod is a square hollow tube, the rotating groove is a square opening, and the rotating groove and the square hollow tube match.

Images