A cement slurry stirring device for sealing a coalfield drilling hole

Abstract

The utility model discloses a cement paste stirring device for coalfield borehole hole sealing, including upper cylinder and lower cylinder, the upper cylinder and lower cylinder are all conical, wherein the upper cylinder lower part diameter is greater than the upper part diameter, the upper part diameter of lower cylinder is greater than the lower part diameter, the maximum diameter of upper cylinder is equal with the maximum diameter of lower cylinder, and the height of upper cylinder is lower than the height of lower cylinder, and the upper cylinder and lower cylinder are connected through the connecting flange between. Adopt the same taper upper cylinder and lower cylinder and assemble into the stirring cylinder, and adopt the stirring mechanism that can dismantle, can place to the lower cylinder after can be inverted upper cylinder when transportation, place to the inverted upper cylinder after the stirring mechanism dismantles, can reduce the overall volume of stirring device, convenient transportation can be applicable to the hole sealing cement paste stirring after field drilling operation.

Description

Technical Field

[0001] This utility model relates to the field of geological exploration drilling engineering technology, specifically a cement slurry mixing device for sealing coalfield boreholes. Background Technology

[0002] Borehole sealing in coalfields is a crucial technological step in ensuring mine safety and environmental protection. This process effectively prevents groundwater and surface water from entering the mine through boreholes by blocking the connection between the aquifers in the roof and floor of the coal seam. It also reduces contact between water, air, and the coal seam, preventing damage caused by oxidation or corrosion. Furthermore, borehole sealing technology can also be used for preventing gas leaks during gas extraction.

[0003] In borehole sealing operations, materials such as cement mortar, expansive cement, or polymer grouting are typically used for sealing. The preparation of these materials requires mixing equipment to ensure uniformity. However, in field drilling operations, large-scale mixing equipment is difficult to use due to terrain and transportation limitations. Therefore, we propose a cement slurry mixing device for coalfield borehole sealing. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a cement slurry mixing device for sealing boreholes in coalfields. During transportation, the upper cylinder can be inverted and placed inside the lower cylinder, and the mixing mechanism can be disassembled and placed inside the inverted upper cylinder, thereby reducing the overall volume of the mixing device for easy transportation. It can be used for sealing cement mixing after field drilling operations and can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cement slurry mixing device for sealing coalfield boreholes, comprising an upper cylinder and a lower cylinder, both of which are conical, wherein the lower diameter of the upper cylinder is larger than the upper diameter, and the upper diameter of the lower cylinder is larger than the lower diameter, the maximum diameter of the upper cylinder is equal to the maximum diameter of the lower cylinder, and the height of the upper cylinder is lower than the height of the lower cylinder, the upper cylinder and the lower cylinder are connected by a connecting flange; the upper surface of the upper cylinder is open, and a mounting frame is provided on the upper surface of the upper cylinder, with a detachable mixing mechanism provided on the lower side of the mounting frame; a feeding cylinder is connected to the bottom end of the lower cylinder, and a valve is provided on the feeding cylinder.

[0006] As a preferred embodiment of this utility model, the stirring mechanism includes an upper stirring rod rotatably disposed on the lower side of the middle of the mounting frame and a lower stirring rod connected to the upper stirring rod. A connecting ring is fixedly disposed on the outer surface of the bottom end of the upper stirring rod and the outer surface of the top end of the lower stirring rod. A screw hole is opened on both connecting rings, and a fixing bolt is threaded into the screw hole. Several fixing clamps are evenly disposed on the periphery of the upper stirring rod and the lower stirring rod, and stirring blades are installed on the fixing clamps by fixing bolts.

[0007] As a preferred technical solution of this utility model, a motor base is fixedly installed on the upper surface of the upper cylinder by bolts, a drive motor is installed on the upper surface of the motor base, the output shaft of the drive motor passes through the lower surface of the motor base and is connected to the drive pulley, the drive pulley is rotatably located below the motor base, the top end of the upper stirring rod passes through the upper surface of the mounting bracket and is connected to the driven pulley, and a belt is provided between the driven pulley and the drive pulley.

[0008] As a preferred embodiment of this utility model, a fixing ring is fixedly provided on the outer surface of the lower cylinder, and a mounting seat is installed on the fixing ring by fixing bolts. A support leg is fixedly provided on the lower surface of the mounting seat.

[0009] As a preferred embodiment of this utility model, the lower surface of the outrigger is provided with a wheel frame, and the wheel frame is provided with a swivel wheel and a foot brake.

[0010] Compared with existing technologies, the advantages of this utility model are as follows: It uses an upper cylinder and a lower cylinder with the same taper to assemble a mixing drum, and employs a detachable mixing mechanism. During transportation, the upper cylinder can be inverted and placed inside the lower cylinder, and the mixing mechanism can be disassembled and placed inside the inverted upper cylinder, thus reducing the overall volume of the mixing device for easier transport. This makes it suitable for mixing sealing cement slurry after field drilling operations. The upper and lower cylinders are connected by a connecting flange, allowing for quick assembly during use. The connecting flange also ensures the overall sealing of the mixing device, balancing mixing efficiency and ease of transport. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0013] Figure 3 This is a side view of the structure of this utility model;

[0014] Figure 4 This is a top view of the structure of this utility model.

[0015] In the diagram: 1 Upper cylinder, 2 Lower cylinder, 3 Connecting flange, 4 Mounting bracket, 5 Upper stirring rod, 6 Lower stirring rod, 7 Connecting ring, 8 Fixing clamp, 9 Stirring blade, 10 Motor base, 11 Drive motor, 12 Drive pulley, 13 Driven pulley, 14 Belt, 15 Discharge cylinder, 16 Valve, 17 Fixing ring, 18 Mounting base, 19 Support leg, 20 Caster wheel, 21 Foot brake. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-4 This utility model provides a technical solution: a cement slurry mixing device for sealing coalfield boreholes, comprising an upper cylinder 1 and a lower cylinder 2, both of which are conical. The lower diameter of the upper cylinder 1 is larger than its upper diameter, and the upper diameter of the lower cylinder 2 is larger than its lower diameter. A discharge cylinder 15 is connected to the bottom end of the inverted conical lower cylinder 2 to facilitate the discharge of the mixed cement slurry. A valve 16 is provided on the discharge cylinder 15 of the lower cylinder 2. The valve 16 can be a gate valve, a ball valve, or a butterfly valve, preferably a butterfly valve. Butterfly valves are thinner, which facilitates integration into the narrow space of the conical discharge port, meeting the goal of miniaturization design.

[0018] The maximum diameter of the upper cylinder 1 is equal to the maximum diameter of the lower cylinder 2. The upper cylinder 1 and the lower cylinder 2 are connected by a connecting flange 3. They can be quickly assembled during use, and the connecting flange ensures the overall sealing of the mixing device, balancing mixing efficiency and convenient transportation.

[0019] The height of the upper cylinder 1 is lower than that of the lower cylinder 2, and the upper cylinder 1 and the lower cylinder 2 have the same taper. During transportation, the upper cylinder 1 can be inverted and placed inside the lower cylinder 2. The upper surface of the upper cylinder 1 is open, and a mounting frame 4 is provided on the upper surface of the upper cylinder 1. A detachable mixing mechanism is provided on the lower side of the mounting frame 4. After the mixing mechanism is disassembled, it can be placed inside the inverted upper cylinder 1, which reduces the overall volume of the mixing device for easy transportation. It can be used for mixing sealing cement slurry after field drilling operations.

[0020] Specifically, the stirring mechanism includes an upper stirring rod 5 rotatably mounted on the lower side of the middle of the mounting frame 4 and a lower stirring rod 6 connected to the upper stirring rod 5. A connecting ring 7 is fixedly mounted on the outer surface of the bottom end of the upper stirring rod 5 and the outer surface of the top end of the lower stirring rod 6. Both connecting rings 7 are provided with screw holes, and fixing bolts are threaded into the screw holes. The upper stirring rod 5 and the lower stirring rod 6 can be connected into one unit by fixing the two connecting rings 7 with the fixing bolts.

[0021] Several fixing clips 8 are evenly arranged on the circumferential surfaces of the upper stirring rod 5 and the lower stirring rod 6. The fixing ends of the fixing clips 8 are fixedly connected to the outer surfaces of the upper stirring rod 5 and the lower stirring rod 6. The opening ends of the fixing clips 8 are far away from the upper stirring rod 5 and the lower stirring rod 6. The stirring blades 9 are installed on the fixing clips 8 by fixing bolts. The side surfaces of the stirring blades 9 and the fixing clips 8 are provided with corresponding screw holes. The fixing bolts used can be anti-loosening nuts to ensure the stability of the stirring mechanism during the stirring process.

[0022] The length of each stirring blade 9 corresponds to its position inside the mixing drum, and the lowest stirring blade 9 extends to within 10cm of the bottom of the lower drum body 2 to ensure that the bottom material is fully mixed.

[0023] Turbulence holes can be provided on the stirring blade 9 to increase turbulence during the stirring process, reduce laminar flow, and improve the stirring effect.

[0024] The specific structure of the stirring blade 9 can adopt the stirring blade structure commonly used in the prior art. The accompanying drawings in this application are only schematic diagrams.

[0025] Optionally, the tightening direction of the fixing bolt on the connecting ring 7 is the same as the rotation direction of the two stirring rods to prevent the fixing bolt from loosening and causing the two stirring rods to separate during stirring. The fixing bolt can also be locked with double nuts.

[0026] Both the stirring rod and the stirring blades adopt a detachable structure, which can further reduce the overall volume of the stirring device during transportation and improve space utilization.

[0027] Alternatively, the mounting frame 4 includes a central circular plate and two or three mounting plates evenly distributed on the outer surface of the circular plate. The mounting plates can also be fixed to the upper surface of the upper cylinder 1 by fixing bolts to facilitate the assembly and disassembly of the mounting frame 4 and the stirring mechanism.

[0028] In a preferred embodiment, a motor base 10 is bolted to the upper surface of the upper cylinder 1. A drive motor 11 is mounted on the upper surface of the motor base 10. The output shaft of the drive motor 11 passes through the lower surface of the motor base 10 and is connected to the drive pulley 12. The drive pulley 12 is rotatably positioned below the motor base 10. The top end of the upper stirring rod 5 protrudes from the upper surface of the mounting bracket 4 and is connected to the driven pulley 13. A belt 14 is provided between the driven pulley 13 and the drive pulley 12. A bearing groove is formed on the upper surface of the upper cylinder 1, and a bearing and a rotating shaft are arranged in the bearing groove. The drive pulley 12 is fixedly connected to the rotating shaft. The drive motor 11 drives the drive pulley 12 to rotate, and the drive pulley 12 drives the driven pulley 13 to rotate via the belt 14, thereby driving the upper stirring rod 5, the lower stirring rod 6, and the stirring blade 9 to rotate, thus stirring the cement slurry in the mixing drum.

[0029] Both the drive motor 11 and the valve 16 (when an electric valve is selected) are electrically connected to an external control switch and powered by an external power source such as a vehicle power supply or a mobile power source (battery).

[0030] The drive motor 11 and valve 16 used in this application are common electronic components in the prior art. Their specific structure, working principle, control method and circuit connection are all well-known technologies and will not be described in detail here.

[0031] In applications where it is inconvenient to carry a power source and the overall size of the mixing drum is small (maximum single piece size ≤ 800mm), the driving mechanism of the mixing device can also be manually driven, using a hand crank and gear set to rotate the mixing rod, or using a pull rope and flywheel structure to form a manual driving mechanism.

[0032] In a preferred embodiment, a fixing ring 17 is fixedly installed on the outer surface of the lower cylinder 2. A mounting base 18, with a C-shaped cross-section, is mounted on the fixing ring 17 via fixing bolts. It is secured to the outside of the fixing ring 17 by the fixing bolts. Support legs 19 are fixedly installed on the lower surface of the mounting base 18. There are at least three sets of mounting bases 18 and support legs 19, which can be used to support the entire stirring device. Simultaneously, the mounting bases 18 and support legs 19 can be detached and placed inside the inverted upper cylinder 1, improving space utilization.

[0033] In a further preferred technical solution, the lower surface of the support leg 19 is provided with a wheel frame, on which a universal wheel 20 and a foot brake 21 are respectively provided. On relatively flat road sections, the mixing device can be moved by the universal wheel 20 and the mixing device can be fixed and parked by the foot brake 21, which improves the flexibility of use and makes it more convenient to use.

[0034] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cement slurry mixing device for sealing coalfield boreholes, characterized in that: The device includes an upper cylinder (1) and a lower cylinder (2), both of which are conical. The lower diameter of the upper cylinder (1) is larger than the upper diameter, and the upper diameter of the lower cylinder (2) is larger than the lower diameter. The maximum diameter of the upper cylinder (1) is equal to the maximum diameter of the lower cylinder (2), and the height of the upper cylinder (1) is lower than the height of the lower cylinder. The upper cylinder (1) and the lower cylinder (2) are connected by a connecting flange (3). The upper surface of the upper cylinder (1) is open, and a mounting frame (4) is provided on the upper surface of the upper cylinder (1). A detachable stirring mechanism is provided on the lower side of the mounting frame (4). A feeding cylinder (15) is connected to the bottom of the lower cylinder (2), and a valve (16) is provided on the feeding cylinder (15).

2. The cement slurry mixing device for sealing coalfield boreholes according to claim 1, characterized in that: The stirring mechanism includes an upper stirring rod (5) rotatably mounted on the lower side of the middle part of the mounting frame (4) and a lower stirring rod (6) connected to the upper stirring rod (5). A connecting ring (7) is fixedly provided on the outer surface of the bottom end of the upper stirring rod (5) and the outer surface of the top end of the lower stirring rod (6). A screw hole is provided on both connecting rings (7), and a fixing bolt is threaded into the screw hole. Several fixing clips (8) are evenly provided on the periphery of the upper stirring rod (5) and the lower stirring rod (6). A stirring blade (9) is installed on the fixing clip (8) by fixing bolts.

3. The cement slurry mixing device for sealing coalfield boreholes according to claim 2, characterized in that: The upper surface of the upper cylinder (1) is fixedly mounted with a motor base (10) by bolts. A drive motor (11) is mounted on the upper surface of the motor base (10). The output shaft of the drive motor (11) passes through the lower surface of the motor base (10) and is connected to the drive pulley (12). The drive pulley (12) is rotatably positioned below the motor base (10). The top end of the upper stirring rod (5) passes through the upper surface of the mounting bracket (4) and is connected to the driven pulley (13). A belt (14) is provided between the driven pulley (13) and the drive pulley (12).

4. A cement slurry mixing device for sealing coalfield boreholes according to any one of claims 1-3, characterized in that: A fixing ring (17) is fixedly provided on the outer surface of the lower cylinder (2), and a mounting seat (18) is installed on the fixing ring (17) by fixing bolts. A support leg (19) is fixedly provided on the lower surface of the mounting seat (18).

5. A cement slurry mixing device for sealing coalfield boreholes according to claim 4, characterized in that: The lower surface of the outrigger (19) is provided with a wheel frame, on which a caster wheel (20) and a foot brake (21) are respectively provided.

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