Grouting equipment for underground operation of coal mine

Abstract

The utility model discloses grouting equipment for underground operation of a coal mine, which comprises a mobile vehicle body and a controller carried by the mobile vehicle body, and the front end of the mobile vehicle body is hinged with a mixing drum through a frame rod. The stirring frame, the first packing auger and the second packing auger are coaxially combined through the first coupler, the one-way clutch and the second coupler, the second packing auger does not rotate during stirring, the stirring frame is matched with the first packing auger to enable materials to turn upwards in the stirring barrel and be fully stirred, and the stirring frame is matched with the driving push rod to work, so that the materials shake in the stirring process, and the stirring efficiency is improved. After stirring, a servo motor is controlled to decelerate to a stop state, then an output shaft of the servo motor is controlled to drive a stirring frame, a first packing auger and a second packing auger to rotate clockwise, homogenized materials are conveyed downwards, a grouting pump is started, the conveyed materials can be subjected to secondary homogenization treatment, and the stirring efficiency and the homogenizing effect are improved; the problem of material caking possibly existing when the first auger pushes the materials is solved, kinetic energy utilization of the servo motor is improved, and unnecessary energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of underground operation equipment, and in particular to a grouting device for underground coal mine operations. Background Technology

[0002] Mine water hazards are one of the main hidden dangers threatening coal mine safety and a significant factor restricting production activities and sustainable development in many mining areas. Currently, with increasing mining depth, mine water inflow is constantly increasing. Joints, fissures, and other discontinuities in fractured rock strata act as water conduits, resulting in large water inflows within the coal seam and posing a serious threat to underground mine safety. To prevent water inrush from confined aquifers at the coal seam floor, grouting for water plugging has become one of the effective measures for preventing mine water hazards and ensuring safe mining.

[0003] Conventional grouting materials typically consist of cement, clay, or a mixture of both. To further improve the strength and seepage prevention effect of clay grout after injection, chemical modifiers are often added to clay-based grouts to enhance their properties. During the preparation of grouting materials, since the raw materials are mostly granular, they require stirring to ensure uniform mixing. For example, Chinese patent application number 201220025372.6 discloses a stirring grouting device that can improve the problem of material accumulation and blockage at the inlet of a screw-type grouting device. This device includes a screw-type grouting device mounted on a support, standing upright on the support. The upper port of the screw-type grouting device is connected to a stirring container containing a stirring device, and the lower port of the screw-type grouting device is connected to a grouting pipe. By changing the screw-type feeder from a horizontal to a vertical position, with the feed inlet (i.e., the upper port) facing upwards and the discharge outlet (i.e., the lower port) facing downwards, and with a stirring device installed in the mixing container, the slurry at the feed inlet of the screw-type feeder is first dispersed by the stirring device during the operation of the mixing and grouting equipment. Then, after entering the feed inlet of the screw-type feeder, it is subjected to the combined effects of screw compression and gravity. Therefore, it is less likely for material to accumulate at the feed inlet of the screw-type feeder.

[0004] In practical operation, the above-mentioned scheme suffers from several drawbacks. Because the screw-type feeder has internal channels, material flows down from these channels before mixing. This prevents effective mixing of the falling material during subsequent grouting, resulting in poor local homogenization and a tendency to clog during the grouting process. The process of pouring gypsum grout through the screw extrusion and gravity of the feeder involves pressurization, which can cause clumping in viscous fluids and hinder grout extraction.

[0005] Therefore, it is necessary to invent a grouting device for underground coal mine operations to solve the above problems. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a grouting device for underground coal mine operations, which addresses the shortcomings of the prior art and solves the technical problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A grouting device for underground coal mine operations includes a mobile vehicle and a controller carried thereon. A mixing drum is hinged to the front end of the mobile vehicle via a frame rod. A cover plate is installed on the top of the mixing drum. A first conveying drum and a second conveying drum are sequentially arranged along the axial direction at the bottom end of the mixing drum. An output bend is detachably installed at the bottom end of the second conveying drum. The mixing drum, the first conveying drum, the second conveying drum, and the output bend are interconnected. A grouting pump is fixedly connected to the mobile vehicle. The input end of the grouting pump is connected to the output bend via an extended conduit. A grouting pipe is provided at the output end of the grouting pump. A feed inlet is opened on the side wall of the mixing drum, and a hopper is installed on the top of the feed inlet for feeding grouting material for sealing holes.

[0009] A servo motor is fixedly installed at the top of the cover plate. The output shaft of the servo motor passes through the cover plate and is connected to the stirring frame through a first coupling. The stirring frame is located at the axial center of the inner side of the stirring drum. A first auger and a second auger are rotatably connected at the axial center of the first and second conveying drums, respectively. The first auger and the second auger are coaxially installed through a one-way clutch. The top of the central rotating shaft of the stirring frame and the central rotating shaft of the first auger are coaxially driven through a second coupling. The outer edge of the blade of the first auger is tangent to the first conveying drum, and a gap is reserved between the outer edge of the blade of the second auger and the second conveying drum.

[0010] An adjustment frame is installed on the cover plate, and a drive push rod is installed between the adjustment frame and the moving vehicle body.

[0011] Preferably, a metal screen plate is provided at the top of the hopper, and the metal screen plate has a number of evenly distributed screen holes.

[0012] Preferably, the metal screen plate is configured as an inverted arched structure, and a vibration motor is provided on the metal screen plate.

[0013] Preferably, the bottom of the stirring drum is funnel-shaped, and the first conveying drum is integrally disposed at the bottom of the stirring drum. The first conveying drum and the second conveying drum can be detachably installed through a combination mechanism, and the inner diameter of the first conveying drum is larger than the inner diameter of the second conveying drum.

[0014] Preferably, the combined mechanism includes two long bolts and four nuts, with the four nuts having uniformly threaded connections on the outside of the two long bolts;

[0015] The bottom end of the first conveying cylinder is integrally provided with a first ring plate, the top and bottom ends of the second conveying cylinder are integrally provided with a second ring plate and a third ring plate, respectively, the long bolts are axially symmetrically distributed and pass through both sides of the first ring plate, the second ring plate and the third ring plate in sequence, and the four nuts are located at the top of the first ring plate and the bottom of the second ring plate, respectively.

[0016] Preferably, a sealing gasket is provided between the first ring plate and the second ring plate, and the sealing gasket is made of rubber material.

[0017] Preferably, a support frame is fixedly connected to the inner side of one of the adjacent ends of the first and second conveying cylinders, and the axial part of the support frame is supported on the outside of the one-way clutch.

[0018] Preferably, both the extended conduit and the grouting pipe are made of rubber hoses, and a sealing gun head is installed at the output end of the grouting pipe.

[0019] Preferably, the drive push rod is configured as an electric push rod, the adjustment frame is mounted on the outside of the servo motor, the bottom end of the electric push rod is hinged to the moving vehicle body, and the output end of the electric push rod is hinged to the adjustment frame.

[0020] Preferably, an ultrasonic sensor is installed on the output bend to sense whether there is material inside the output bend. The electric push rod and the vibration motor are both electrically connected to the controller. The controller is equipped with a microcontroller. The connection terminal of the microcontroller is electrically connected to a timer. The input and output terminals of the microcontroller are respectively equipped with an A / D converter and a D / A converter. The ultrasonic sensor is electrically connected to the A / D converter. The grouting pump and the servo motor are both electrically connected to the D / A converter.

[0021] This utility model has the following beneficial effects:

[0022] The mixing frame, first auger, and second auger are coaxially combined via a first coupling, a one-way clutch, and a second coupling, and driven by a servo motor. During mixing, the second auger does not rotate. The mixing frame, in conjunction with the first auger, causes the material to tumble upwards within the mixing drum and mix thoroughly. This, combined with the drive push rod, creates a shaking motion during mixing, improving mixing efficiency and homogenization. After mixing, the servo motor is first decelerated to a stop, and then its output shaft drives the mixing frame, first auger, and second auger to rotate clockwise, conveying the homogenized material downwards. The grouting pump is then activated for grouting operations. The conveyed material is further cut and dispersed, achieving secondary homogenization and overcoming the potential material clumping problem caused by the first auger. This facilitates subsequent material discharge, improves the kinetic energy utilization of the servo motor, and reduces energy consumption.

[0023] By first screening the material through a metal screen, large particles and impurities are intercepted, preventing damage to the mixing frame, the first auger and the second auger, and also avoiding blockages during subsequent conveying. The first conveying cylinder and the second conveying cylinder can be disassembled and installed through a combination mechanism, which facilitates disassembly and maintenance in case of blockages or replacement of parts in the future.

[0024] By introducing an intelligent control system, ultrasonic sensors are used to detect whether there is material inside the output bend. When no material is detected inside the output bend, the servo motor and grouting pump are automatically stopped to start the next mixing operation, thereby achieving automated operation, improving work efficiency and intelligence, avoiding dry suction and idling, and reducing unnecessary energy waste. Attached Figure Description

[0025] Figure 1 A first-view perspective perspective view of the roll fixing device provided by this utility model.

[0026] Figure 2 A second-view perspective perspective view of the roll fixing device provided by this utility model.

[0027] Figure 3 This is a bottom view of the roll fixing device provided by this utility model.

[0028] Figure 4 This is a disassembled structural diagram of the roll body and the mounting kit in this utility model.

[0029] Figure 5 This is an exploded view of the locking part in this utility model.

[0030] Figure 6 A first-view perspective perspective view of the roll fixing device provided by this utility model.

[0031] Figure 7 A second-view perspective perspective view of the roll fixing device provided by this utility model.

[0032] Figure 8 This is a bottom view of the roll fixing device provided by this utility model.

[0033] Figure 9 This is a disassembled structural diagram of the roll body and the mounting kit in this utility model.

[0034] Among them are:

[0035] Mobile vehicle body - 1; Controller - 2; Frame pole - 3; Mixing drum - 4; Cover plate - 5; First conveying drum - 6; Second conveying drum - 7; Output bend - 8; Grouting pump - 9; Extended guide pipe - 10; Grouting pipe - 11; Hopper - 12; Servo motor - 13; First coupling - 14; Mixing frame - 15; First auger - 16; Second auger - 17; One-way clutch - 18; Second coupling - 19; Adjusting frame - 20; Drive push rod - 21; Metal screen plate - 22; Screen hole - 23; Long rod bolt - 24; Nut - 25; First ring plate - 26; Second ring plate - 27; Third ring plate - 28; Sealing gasket - 29; Support frame - 30; Ultrasonic sensor - 31; Microcontroller - 32; Timer - 33. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0037] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.

[0038] like Figures 1-8 As shown, a grouting device for underground coal mine operations includes a mobile vehicle body 1 and a controller 2 carried thereon. A mixing drum 4 is hinged to the front end of the mobile vehicle body 1 via a frame rod 3. A cover plate 5 is installed on the top of the mixing drum 4. A first conveying drum 6 and a second conveying drum 7 are arranged sequentially along the axial direction at the bottom end of the mixing drum 4. An output bend 8 is detachably installed at the bottom end of the second conveying drum 7. The mixing drum 4, the first conveying drum 6, the second conveying drum 7 and the output bend 8 are interconnected. A grouting pump 9 is fixedly connected to the mobile vehicle body 1. The input end of the grouting pump 9 is connected to the output bend 8 via an extended conduit 10. A grouting pipe 11 is provided at the output end of the grouting pump 9. A feed inlet is opened on the side wall of the mixing drum 4, and a hopper 12 is installed on the top of the feed inlet for feeding grouting material for sealing holes.

[0039] A servo motor 13 is fixedly installed at the top of the cover plate 5. The output shaft of the servo motor 13 passes through the cover plate 5 and is connected to the stirring frame 15 through the first coupling 14. The stirring frame 15 is located at the inner axis of the stirring drum 4. The first conveying drum 6 and the second conveying drum 7 are respectively rotatably connected to the axis of the first auger 16 and the second auger 17. The first auger 16 and the second auger 17 are coaxially installed through a one-way clutch 18. The central shaft of the stirring frame 15 and the top of the central shaft of the first auger 16 are coaxially driven through the second coupling 19. The outer edge of the blade of the first auger 16 is tangent to the first conveying drum 6. A gap is reserved between the outer edge of the blade of the second auger 17 and the second conveying drum 7. The length of the second conveying drum 7 is less than the length of the second conveying drum 7, so that a receiving cavity can be formed at the bottom of the second conveying drum 7 to facilitate the accumulation of materials.

[0040] An adjusting frame 20 is installed on the cover plate 5, and a drive push rod 21 is installed between the adjusting frame 20 and the moving vehicle body 1. During the mixing and discharging process, by controlling the extension and retraction of the output end of the drive push rod 21, the mixing drum 4, the first conveying drum 6, and the second conveying drum 7 can be made to swing, promoting material movement and making the grouting material for sealing more uniform. In addition, during discharging, the mixing drum 4, the first conveying drum 6, and the second conveying drum 7 should be kept as vertical as possible to reduce material residue inside.

[0041] Specifically, in the above scheme, a metal sieve plate 22 is provided at the top of the hopper 12, and a number of evenly distributed sieve holes 23 are opened on the metal sieve plate 22. By placing the raw material on the metal sieve plate 22 and adding water, large particles and impurities will be intercepted, avoiding damage to the mixing frame 15, the first auger 16 and the second auger 17, and also avoiding blockage problems during subsequent conveying.

[0042] Specifically, in the above scheme, the metal screen plate 22 is set as an inverted arch structure, which is convenient for carrying materials, thereby realizing the sorting and interception of materials. Furthermore, a vibration motor is installed on the metal screen plate 22, and the output end of the vibration motor acts on the metal screen plate 22 to make it vibrate at the same frequency, thereby improving the screening effect.

[0043] Specifically, in the above scheme, the bottom of the stirring cylinder 4 is set in a trumpet shape, and the first conveying cylinder 6 is integrally set at the bottom of the stirring cylinder 4. The first conveying cylinder 6 and the second conveying cylinder 7 can be detached and installed through a combination mechanism, and the inner diameter of the first conveying cylinder 6 is larger than the inner diameter of the second conveying cylinder 7.

[0044] Specifically, in the above scheme, the combined mechanism includes two long bolts 24 and four nuts 25, with the four nuts 25 evenly threaded onto the outside of the two long bolts 24; a first ring plate 26 is integrally provided at the bottom end of the first conveying cylinder 6, and a second ring plate 27 and a third ring plate 28 are integrally provided at the top and bottom ends of the second conveying cylinder 7, respectively. The long bolts 24 are axially symmetrically distributed and sequentially pass through both sides of the first ring plate 26, the second ring plate 27, and the third ring plate 28. The four nuts 25 are located at the top of the first ring plate 26 and the bottom of the second ring plate 27, respectively. This device is easy to assemble and easy to disassemble and maintain in case of blockage or replacement of parts.

[0045] Specifically, in the above scheme, a sealing gasket 29 is provided between the first ring plate 26 and the second ring plate 27, and the sealing gasket 29 is made of rubber material to improve the sealing performance of the conveying pipeline.

[0046] Specifically, in the above scheme, a support frame 30 is fixedly connected to the inner side of the adjacent end of the first conveying cylinder 6 and the second conveying cylinder 7, and the axial part of the support frame 30 is supported on the outside of the one-way clutch 18.

[0047] Specifically, in the above scheme, both the extended conduit 10 and the grouting pipe 11 are made of rubber hoses. The extended conduit 10 is designed to meet the swing adjustment of the combined structure of the mixing drum 4, the first conveying drum 6, and the second conveying drum 7. The output end of the grouting pipe 11 is equipped with a sealing gun head, which facilitates directional sealing grouting and ensures the stability and accuracy of grouting.

[0048] Specifically, in the above scheme, the drive push rod 21 is set as an electric push rod, the adjustment frame 20 is covered outside the servo motor 13, the bottom end of the electric push rod is hinged to the moving vehicle body 1, and the output end of the electric push rod is hinged to the adjustment frame 20. As other embodiments, the drive push rod 21 can also be set as a hydraulic cylinder or a pneumatic cylinder and used in conjunction with the power system.

[0049] like Figures 1-9 As shown, an ultrasonic sensor 31 is installed on the output bend 8 to sense whether there is material inside the output bend 8. The electric push rod and the vibration motor are both electrically connected to the controller 2. The controller 2 is equipped with a microcontroller 32, and a timer 33 is electrically connected to the connection terminal of the microcontroller 32. The input and output terminals of the microcontroller 32 are respectively equipped with an A / D converter and a D / A converter. The ultrasonic sensor 31 is electrically connected to the A / D converter. The grouting pump 9 and the servo motor 13 are both electrically connected to the D / A converter. The servo motor 13 used in this application is a reversible motor, and its output terminal is equipped with a gearbox. The servo motor 13 can autonomously control the rotation of its output shaft through the microcontroller 32. The mixing process duration is set by the controller 2 during the operation of the microcontroller 32.

[0050] In use, the material is first screened through the metal sieve plate 22 to remove large particles of impurities. Water is added to the material entering the mixing drum 4. The output shaft of the servo motor 13 drives the first auger 16 through the second coupling 19. At this time, the output shaft of the servo motor 13 drives the mixing frame 15 and the first auger 16 to rotate counterclockwise. The second auger 17 does not rotate at this time under the engagement of the one-way clutch 18. The mixing frame 15 stirs the material in the mixing drum 4. The first auger 16 pushes the material upward and flips it. The output end of the drive push rod 21 is further controlled to extend and retract, so that the material shakes during the stirring process, which improves the stirring efficiency and homogenization effect. After the set time is reached, the servo motor 13 is controlled to decelerate to a stop state. Then, the output shaft of the servo motor 13 drives the mixing frame 15 and the first auger 16 to rotate clockwise. The second auger 17 rotates clockwise in this state, aligning the grouting pipe 11 and the sealing gun head at its end with the area to be grouted.

[0051] When the grouting pump 9 is started, the first auger 16 rotates and conveys the material downwards. After entering the second conveying cylinder 7, the material first enters the partition area between the first auger 16 and the second auger 17, and is cut off in conjunction with the support frame 30. Since there is a large gap between the blade edge of the second auger 17 and the second conveying cylinder 7, and its blades are blade-shaped, its rotation has the effect of cutting and further dispersing the material, overcoming the material agglomeration problem that may occur when the first auger 16 pushes the material, realizing secondary homogenization of the material, and facilitating the subsequent discharge of the material. The ultrasonic sensor 31 senses whether there is material in the output bend 8. When it detects that there is no material in the output bend 8, it controls the servo motor 13 and the grouting pump 9 to automatically stop and start the next mixing operation, so as to improve the kinetic energy utilization of the servo motor 13 and reduce unnecessary energy consumption.

[0052] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A grouting device for underground coal mine operation, comprising a mobile vehicle body (1) and a controller (2) carried thereby, characterized in that: The mobile vehicle body (1) is hinged with a stirring drum (4) through a frame rod (3) at the front end, the top of the stirring drum (4) is provided with a cover plate (5), the bottom end of the stirring drum (4) is sequentially provided with a first conveying drum (6) and a second conveying drum (7) along the axial direction, the bottom end of the second conveying drum (7) is detachably provided with an output elbow (8), and the stirring drum (4), the first conveying drum (6), the second conveying drum (7) and the output elbow (8) are communicated with each other, a grouting pump (9) is fixedly connected to the mobile vehicle body (1), the input end of the grouting pump (9) is communicated with the output elbow (8) through an extension conduit (10), the output end of the grouting pump (9) is provided with a grouting pipe (11), a feeding port is formed in the side wall of the stirring drum (4), and a hopper (12) is mounted at the top of the feeding port for feeding of the grouting material for sealing hole; The top end of the cover plate (5) is fixedly provided with a servo motor (13), the output shaft of the servo motor (13) penetrates through the cover plate (5) and is drivingly connected with a stirring frame (15) through a first coupling (14), and the stirring frame (15) is arranged at the inside axial position of the stirring drum (4), first and second augers (16, 17) are rotatably connected with the axial positions of the first and second conveying drums (6, 7) respectively, and the first and second augers (16, 17) are coaxially mounted through a one-way clutch (18), the central rotating shaft of the stirring frame (15) is coaxially drivingly connected with the top end of the central rotating shaft of the first auger (16) through a second coupling (19), the outer edge of the blade of the first auger (16) is tangent to the first conveying drum (6), and a gap is reserved between the outer edge of the blade of the second auger (17) and the second conveying drum (7); An adjusting frame (20) is mounted on the cover plate (5), and a driving push rod (21) is mounted between the adjusting frame (20) and the mobile vehicle body (1).

2. The grouting device for underground coal mine operations according to claim 1, characterized in that: A metal sieve plate (22) is arranged at the top end of the hopper (12), and a plurality of sieve holes (23) are uniformly formed in the metal sieve plate (22).

3. The grouting device for underground coal mine operations according to claim 2, characterized in that: The metal sieve plate (22) is arranged in an inverted arc structure, and a vibrating motor is arranged on the metal sieve plate (22).

4. The grouting device for underground coal mine operation according to claim 1, characterized in that: The bottom of the stirring drum (4) is arranged in a horn shape, the first conveying drum (6) is integrally arranged at the bottom end of the stirring drum (4), the first and second conveying drums (6, 7) are detachably mounted through a combination mechanism, and the inner diameter of the first conveying drum (6) is larger than the inner diameter of the second conveying drum (7).

5. The grouting device for underground coal mining operations according to claim 4, characterized in that: The combination mechanism comprises two long rod bolts (24) and four nuts (25), and the four nuts (25) are uniformly threadedly sleeved on the outer sides of the two long rod bolts (24); The bottom end of the first conveying drum (6) is integrally provided with a first ring plate (26), the top and bottom ends of the second conveying drum (7) are integrally provided with a second ring plate (27) and a third ring plate (28) respectively, the long rod bolts (24) are symmetrically distributed and sequentially penetrate through the two side positions of the first, second and third ring plates (26, 27, 28), and the four nuts (25) are respectively located at the top of the first ring plate (26) and the bottom of the second ring plate (27).

6. The grouting device for underground coal mining operations of claim 5, wherein: The first ring plate (26) and the second ring plate (27) are provided with a sealing washer (29) made of rubber material.

7. The grouting device for underground coal mine operations of claim 1, wherein: The inner side of one end of the first conveying cylinder (6) and the second conveying cylinder (7) is fixedly connected with a support frame (30), and the support frame (30) is supported at the outer side of the one-way clutch (18).

8. The grouting device for underground coal mine operations of claim 1, wherein: The lengthened guide pipe (10) and the grouting pipe (11) are both made of rubber hose, and the grouting pipe (11) is provided with a hole sealing gun head at the output end.

9. The grouting device for underground operations in coal mines according to claim 1, characterized in that: The driving push rod (21) is an electric push rod, the adjusting frame (20) is arranged outside the servo motor (13), the bottom end of the electric push rod is hingedly connected with the moving vehicle body (1), and the output end of the electric push rod is hingedly connected with the adjusting frame (20).

10. The grouting device for underground coal mining operations of claim 9, wherein: The output elbow pipe (8) is provided with an ultrasonic sensor (31) for sensing whether there is material in the output elbow pipe (8), the electric push rod and the vibration motor are electrically connected with the controller (2), the controller (2) is internally provided with a single-chip microcomputer (32), the connecting end of the single-chip microcomputer (32) is electrically connected with a timer (33), the input end and the output end of the single-chip microcomputer (32) are respectively provided with an A / D converter and a D / A converter, the ultrasonic sensor (31) is electrically connected with the A / D converter, and the grouting pump (9) and the servo motor (13) are electrically connected with the D / A converter.

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