A gob coal bed gas rapid plugging device

Abstract

The utility model discloses a kind of gob coalbed methane rapid plugging devices, it is related to gas layer plugging technical field, including directional drilling rig and mixing box, mixing box is used to store filling material, support frame carries out stirring to filling material in mixing box, improve the injection efficiency of filling material, improve the plugging speed to gas layer, and support frame quantitative injection retarder or accelerator in mixing box changes the coagulation speed of filling material, improve the plugging effect to gas layer, while the filling material in mixing box is stirred, the inside wall of mixing box is scraped, avoid that filling material sticks in the inside wall of mixing box, the utility model improves the speed and efficiency of plugging to gas layer.

Description

Technical Field

[0001] This utility model relates to the field of coalbed methane plugging technology, and in particular to a rapid coalbed methane plugging device for goaf areas. Background Technology

[0002] Coalbed methane plugging in goaf areas is a core measure for safe production and sustainable development in coal mines, and its importance is reflected in multiple dimensions. From a safety perspective, plugging effectively curbs the risks of gas explosions and asphyxiation. Methane concentrations exceeding 5% reach the explosion threshold, and inadequate sealing of goaf areas can easily lead to major accidents, such as the numerous mine disasters in China in recent years caused by gas leaks. Simultaneously, plugging prevents oxygen inflow, inhibits spontaneous combustion of coal, avoids secondary disasters such as fires and roof collapses, and ensures the safety of underground operations. From an environmental perspective, methane is a potent greenhouse gas; plugging combined with extraction and utilization can significantly reduce emissions, contributing to the "dual carbon" goals (carbon dioxide, carbon sequestration, and carbon emissions).

[0003] Chinese invention patent CN113833519A discloses a method for filling goaf in metal mines. This method transports filling material to the goaf through a pipeline to fill it. However, this device cannot effectively ensure that the filling material solidifies quickly after reaching the designated location to achieve sealing. Furthermore, this device cannot stir the filling material to ensure its uniformity, thus failing to achieve rapid sealing of coalbed methane. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model discloses a rapid sealing device for coalbed methane in goaf areas.

[0005] The technical solution adopted to solve the above-mentioned technical problems is as follows: a rapid sealing device for coalbed methane in goaf areas, including a directional drilling rig and a mixing box. The mixing box is provided with a discharge port at its lower end, which is connected to the directional drilling rig. The material in the mixing box enters the directional drilling rig through the discharge port and is injected into the filling position by a mud pump. A mixing mechanism is provided inside the mixing box. A placement frame is provided on the side of the support frame. Storage box one and storage box two are slidably arranged on the placement frame. Storage box one contains a retarder, and storage box two contains a accelerator. Both storage box one and storage box two are provided with material pipes.

[0006] Furthermore, the stirring mechanism includes a base disposed on the side of the support frame, an adjusting frame slidably disposed on the base, and a stirring frame and a gear 1 disposed on the adjusting frame, both of which are coaxially disposed with the stirring box.

[0007] Furthermore, a stirring column is coaxially arranged at the lower end of the stirring frame, and two sets of stirring rods are rotatably arranged inside the stirring frame. Stirring blocks are arranged on the stirring rods, and multiple sets of protruding columns are arranged on the stirring blocks and the stirring column.

[0008] Furthermore, the stirring block is mounted at an angle on the stirring rod.

[0009] Furthermore, a second gear is provided at the end of the stirring rod away from the stirring block, and the second gear meshes with the first gear.

[0010] Furthermore, the mixing rack is provided with multiple sets of mounting brackets on its side, and scrapers are slidably mounted on the mounting brackets, with the scrapers fitting against the inner wall of the mixing tank.

[0011] The advantages of this invention compared with the prior art are: This invention automatically stirs the cement slurry, ensuring uniform mixing of the slurry and improving the sealing effect of the cement slurry. At the same time, it avoids the cement slurry residue on the inner wall of the mixing tank from solidifying and affecting all the cement slurry in the mixing tank. Furthermore, this invention adjusts the solidification speed of the cement slurry according to the depth of the sealing position, ensuring that the cement slurry solidifies quickly after reaching the designated position, thereby improving the efficiency and speed of sealing the goaf. Attached Figure Description

[0012] Figure 1 This is a front view of the overall structure of this utility model.

[0013] Figure 2 This is a right view of the overall structure of this utility model.

[0014] Figure 3 for Figure 2 Cross-sectional view of the structure along the AA direction.

[0015] Figure 4 This is a cross-sectional view of the mixing rack structure of this utility model.

[0016] Figure 5 This is a schematic diagram of the mixing rack structure of this utility model.

[0017] Attached reference numerals: 1-Support frame; 2-Placement frame; 3-Storage box one; 4-Material pipe; 5-Base; 6-Adjusting frame; 7-Mixing box; 8-Discharge port; 9-Storage box two; 10-Mixing rack; 11-Mounting frame; 12-Scraper; 13-Gear one; 14-Mixing rod; 15-Mixing block; 16-Protruding column; 17-Gear two; 18-Mixing column. Detailed Implementation

[0018] refer to Figures 1 to 5The device shown is a rapid coalbed methane plugging device for goaf areas, including a directional drilling rig and a support frame 1. A mixing tank 7 is installed on the support frame 1 to hold cement slurry. The mixing tank 7 is connected to the directional drilling rig. When plugging is required, the cement slurry in the mixing tank 7 is injected into the plugging position through the directional component. The mixing tank 7 is equipped with a mixing block 15, a mixing column 18, and a scraper 12. The mixing block 15, the mixing column 18, and the scraper 12 mix the cement slurry in the mixing tank 7 to prevent the cement slurry from solidifying. In addition, a slowing agent or a quick-setting agent is automatically added to the cement slurry according to the injection depth to change the solidification rate of the cement slurry, so as to ensure that goaf areas at different depths can be plugged, thereby improving the plugging speed and efficiency.

[0019] A placement rack 2 is provided on the side of the support frame 1. Storage tank 1 3 and storage tank 2 9 are slidably mounted on the upper end of the placement rack 2. Storage tank 1 3 and storage tank 2 9 slide back and forth on the placement rack 2 via a linear motor. A material pipe 4 is provided at the end of storage tank 1 3 and storage tank 2 9 facing the support frame 1. A water pump is installed inside storage tank 1 3 and storage tank 2 9. The water pumps inject the liquid inside storage tank 1 3 and storage tank 2 9 into the mixing tank 7 through the material pipes 4. After determining the depth of the goaf, if the sealing location is deep, storage tank 1 3 is driven to slide on the placement rack 2. Storage tank 1 3 moves the material pipe 4 to the top of the mixing tank 7, and the water pump inside storage tank 1 3 is activated to pump the retarder inside storage tank 1 3 through the material pipe 4. Pipe 4 is injected into the mixing tank 7 to slow down the setting speed of cement. If the sealing depth is shallow, the storage tank 2 9 is driven to slide on the placement frame 2. The storage tank 2 9 drives the material pipe 4 to the top of the mixing tank 7, and drives the water pump in the storage tank 2 9 to inject the quick-setting agent in the storage tank 2 9 into the mixing tank 7 through the material pipe 4 to increase the setting speed of cement slurry. The mixing tank 7 is set in the support frame 1. The lower end of the mixing tank 7 is set with a discharge port 8. The discharge port 8 is equipped with a valve and is connected to the directional drilling machine through a hose. The support frame 1 is set with a base 5 on the side. An adjusting frame 6 is slidably set on the base 5. The adjusting frame 6 slides back and forth on the base 5 through a hydraulic cylinder. The mixing frame 10 is rotatably set on the adjusting frame 6. The mixing frame 10 is driven by a motor. The mixing frame 10 rotates on the adjusting frame 6. A gear 13 is mounted on the lower end of the adjusting frame 6. A mixing column 18 is mounted on the lower end of the mixing frame 10, which mixes the cement slurry. Two sets of mixing rods 14 are rotatably mounted inside the mixing frame 10. A gear 17 is mounted on one end of each mixing rod 14, meshing with gear 13. A mixing block 15 is mounted on the other end of each mixing rod 14, tilted on the mixing rod 14. Both the mixing block 15 and the mixing column 18 have multiple sets of protruding columns 16. When the mixing frame 10 rotates, it drives the two sets of mixing rods 14 to rotate along the axis of gear 13. Since gear 13 meshes with gear 17 and gear 13 is fixed to the adjusting frame 6, gear 14... Gear 17 rotates on gear 13. When gear 17 rotates, it drives the stirring rod 14 to rotate. The stirring rod 14 drives the stirring block 15 to rotate. The stirring block 15 stirs the cement slurry. When the mixing frame 10 rotates, it drives the stirring column 18 to rotate. The stirring column 18 stirs the cement slurry synchronously. Multiple sets of mounting frames 11 are provided on the side of the mixing frame 10. The mounting frame 11 is equipped with a scraper 12. The scraper 12 slides on the mounting frame 11 through a cylinder. At the same time, the cylinder drives the scraper 12 to slide on the mounting frame 11. The scraper 12 is in contact with the inner wall of the mixing box 7. When the mixing frame 10 is driven to rotate, the mixing frame 10 drives the scraper 12 to rotate. The scraper 12 scrapes the inner wall of the mixing box 7 to prevent cement slurry from remaining in the mixing box 7 and solidifying.

[0020] Working principle: During operation, the discharge port 8 is connected to the directional drilling machine via a hose. The directional drilling machine drills the drill bit into the sealing position, injecting cement slurry into the mixing tank 7. Depending on the depth of the sealing position, the storage tank 1 3 or storage tank 2 9 is driven to add retarder or accelerator into the mixing tank 7. Subsequently, the adjusting frame 6 is driven to slide on the base 5, and the adjusting frame 6 drives the mixing frame 10 to insert into the mixing tank 7. The scraper 12 is driven to slide on the mounting frame 11, and the scraper 12 is in contact with the inner wall of the mixing tank 7. When mixing the cement slurry, the mixing frame 10 is driven to rotate. The mixing frame 10 drives the two sets of mixing rods 14 to rotate along the axis of gear 13. Since gear 13 and gear 2 17 are connected, the mixing frame 10 rotates. The gears are engaged, and gear 13 is fixed on the adjusting frame 6. At this time, gear 2 17 rotates on gear 13. When gear 2 17 rotates, it drives the stirring rod 14 to rotate. The stirring rod 14 drives the stirring block 15 to rotate. The stirring block 15 stirs the cement slurry. When the stirring frame 10 rotates, it drives the stirring column 18 to rotate. The stirring column 18 stirs the cement slurry synchronously. The scraper 12 scrapes the inner wall of the mixing tank 7 to prevent the cement slurry residue on the inner wall of the mixing tank 7 from solidifying and causing an impact. The stirring of the cement slurry ensures that the slurry is evenly mixed. When sealing, the valve on the discharge port 8 is opened, and the directional drilling machine is started to transport the cement slurry in the mixing tank 7 to the sealing position through the drill rod and drill bit.

Claims

1. A gob coal bed methane rapid plugging device, comprising a directional drilling machine and a mixing box (7), characterized in that: It also includes a support frame (1), and the lower end of the mixing tank (7) is provided with a discharge port (8). The discharge port (8) is connected to the directional drilling machine. The material in the mixing tank (7) enters the directional drilling machine through the discharge port (8) and is injected into the filling position by the mud pump. The mixing tank (7) is provided with a mixing mechanism. The support frame (1) is provided with a placement frame (2) on its side. Storage box one (3) and storage box two (9) are slidably arranged on the placement frame (2). The storage box one (3) contains a retarder, and the storage box two (9) contains a accelerator. Both the storage box one (3) and the storage box two (9) are provided with a material pipe (4).

2. The goaf coal bed gas rapid plugging device according to claim 1, characterized in that: The stirring mechanism includes a base (5) disposed on the side of the support frame (1), an adjustment frame (6) is slidably disposed on the base (5), and a stirring frame (10) and a gear (13) are disposed on the adjustment frame (6). The stirring frame (10) and the gear (13) are both coaxially disposed with the stirring box (7).

3. The goaf coal bed gas rapid plugging device according to claim 2, characterized in that: The stirring rack (10) is coaxially provided with a stirring column (18) at its lower end. Two sets of stirring rods (14) are rotatably provided inside the stirring rack (10). A stirring block (15) is provided on the stirring rod (14). Multiple sets of protruding columns (16) are provided on the stirring block (15) and the stirring column (18).

4. A rapid sealing device for coalbed methane in goaf areas according to claim 3, characterized in that: The stirring block (15) is installed at an angle on the stirring rod (14).

5. A rapid sealing device for coalbed methane in goaf areas according to claim 4, characterized in that: The stirring rod (14) is provided with a gear two (17) at the end away from the stirring block (15), and the gear two (17) meshes with the gear one (13).

6. A rapid sealing device for coalbed methane in goaf areas according to claim 5, characterized in that: The mixing rack (10) is provided with multiple sets of mounting racks (11) on its side. A scraper (12) is slidably mounted on the mounting rack (11) and the scraper (12) is in contact with the inner wall of the mixing tank (7).

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