Grouting system for preventing and controlling overlying strata damage water disasters in coal mine

Abstract

The invention relates to the technical field of coal mine overlying strata water damage prevention and control, and discloses a grouting system for coal mine overlying strata damage water damage prevention and control. The grouting system comprises a supporting seat, a through opening is formed in the middle of the supporting seat, a top plate is arranged above the supporting seat, and electric push rods connected with the top plate are symmetrically installed at the top end of the supporting seat; a fixing plate, a slurry inlet pipe and an electric telescopic rod are sequentially installed on the top plate, an output shaft of the electric telescopic rod is connected with a grouting assembly, a toothed plate and a sliding groove piece are arranged on one side of the fixing plate, a motor is installed at the bottom end of the fixing plate, and an output shaft of the motor is connected with a second gear; according to the device, the grouting pipe, the conical head and the spiral cutter rotate in the downward moving process, so that the spiral cutter can conveniently crush gravelly soil which prevents the grouting pipe from moving downwards in a prefabricated hole, and the moving smoothness of the grouting pipe, the conical head and the spiral cutter is improved; and the problem that the grouting pipe is easily blocked by gravelly soil in the grouting pipe in the process of going deep into the prefabricated hole is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of prevention and control of water disasters in overlying strata of coal mines, and particularly to a grouting system for preventing and controlling water disasters caused by overlying strata failure in coal mines. Background Art

[0002] With the continuous mining of coal mines, the separation layers in the overlying strata of the stope gradually develop, and the aquifers in the overlying strata continuously replenish the separation layers. At the same time, with the gradual increase of the water accumulation volume and the deformation of the overlying strata, under certain conditions, the separation layers in the overlying strata will break, causing the water in the separation cavity to gush out, resulting in the water inrush disaster of the separation layer. This disaster has the characteristics of a large amount of water gushing out instantaneously and no obvious signs of water inrush. Therefore, it will deteriorate the working environment of workers, affect the construction progress and quality of coal mine projects, bring unsafe factors to coal mine projects, and thus, in order to ensure life safety, it is often necessary to use the overlying strata grouting filling technology for grouting operations.

[0003] When carrying out grouting operations, first, a prefabricated hole is drilled into the overlying strata on the ground through a drilling machine, and then a grouting pipe is placed into the prefabricated hole and deepened. Since there is a blockage phenomenon of crushed stone soil in the drilled prefabricated hole, which hinders the deepening of the grouting pipe, the deepening speed of the grouting pipe will be slowed down, thereby affecting its grouting efficiency. Summary of the Invention

[0004] In order to solve the technical problem that the blockage of crushed stone soil in the prefabricated hole hinders the deepening of the grouting pipe, thus slowing down the deepening speed of the grouting pipe and affecting its grouting efficiency, the present invention provides a grouting system for preventing and controlling water disasters caused by overlying strata failure in coal mines.

[0005] The present invention is realized by the following technical solutions: A grouting system for preventing and controlling water disasters caused by overlying strata failure in coal mines includes a support base. A through hole is provided in the middle of the support base. A top plate is provided above the support base. Electric push rods connected to the top plate are symmetrically installed at the top of the support base. A fixed plate, a grout inlet pipe, and an electric telescopic rod are sequentially installed on the top plate. The output shaft of the electric telescopic rod is connected to a grouting assembly. A toothed plate and a sliding groove member are provided on one side of the fixed plate. A motor is installed at the bottom of the fixed plate. The output shaft of the motor is connected to a second gear;

[0006] The grouting assembly includes a fixed seat installed at the bottom end of the output shaft of the electric telescopic rod. An installation seat is fixedly connected to the bottom of the fixed seat. An installation cylinder sleeved outside the grout inlet pipe is rotatably connected to the installation seat. A grouting pipe is rotatably installed at the bottom of the installation cylinder. A conical head is fixedly connected to the bottom of the grouting pipe. A spiral blade is fixedly connected to the outer wall of the conical head. A mixing mechanism located inside the grouting pipe is provided at the top of the conical head. A rotating cylinder is rotatably installed in the middle of the fixed seat. A transmission mechanism connected to the mixing mechanism is provided outside the rotating cylinder;

[0007] The outer wall of the grouting pipe is provided with accommodation grooves at equal distances. There are four accommodation grooves. The inner wall of the grouting pipe is symmetrically provided with grouting holes arranged at equal distances, and the grouting holes are communicated with the accommodation grooves;

[0008] The outer wall of the installation cylinder is successively and fixedly sleeved with a first bevel gear, a first connecting seat, and a shielding mechanism connected to a second gear from top to bottom. The first connecting seat is an L-shaped structure, and a linkage unit connected to the first bevel gear, the toothed plate, and the sliding groove member is installed on the first connecting seat. The grouting pipe is symmetrically installed with an expansion unit connected to the transmission mechanism and the shielding mechanism;

[0009] The linkage unit includes a sleeve rotatably installed on the first connecting seat. The outer wall of the sleeve is fixedly sleeved with a first gear meshed with the toothed plate. A rotating rod is slidably inserted into the interior of the sleeve. One end of the rotating rod is fixedly connected with a second bevel gear meshed with the first bevel gear. The other end of the rotating rod is rotatably installed with a sliding seat. A sliding rod slidably connected to the sliding groove member is fixedly installed on the sliding seat. A first spring connecting the side wall of the sleeve and the side wall of the sliding seat is sleeved outside the rotating rod. A pushing member connected to the transmission mechanism is rotatably installed on the rotating rod.

[0010] As a further improvement of the above solution, the mixing mechanism includes a rotating cylinder rotatably installed at the top end of the conical head. The rotating cylinder extends into the interior of the rotating cylinder and is sleeved outside the slurry inlet pipe. The top end of the outer wall of the rotating cylinder is symmetrically provided with convex plates. The inner wall of the rotating cylinder is symmetrically provided with grooves sleeved on the outer walls of the convex plates. The convex plates slide on the inner walls of the grooves. A diversion seat is fixedly connected inside the rotating cylinder. The diversion seat is a conical structure. The outer wall of the rotating cylinder is provided with slurry outlet holes at equal distances on one side of the diversion seat. Stirring plates slidably contacting the inner wall of the grouting pipe are symmetrically installed on the outer wall of the rotating cylinder.

[0011] As a further improvement of the above solution, the outer wall of the rotating rod is symmetrically installed with limiting rods. The inner wall of the sleeve is symmetrically provided with limiting grooves. The limiting rods slide inside the limiting grooves, and both the limiting rods and the limiting grooves are rectangular structures.

[0012] As a further improvement of the above solution, the sliding groove member includes a first strip-shaped groove, an inclined groove, and a second strip-shaped groove arranged in sequence from top to bottom. The first strip-shaped groove, the inclined groove, and the second strip-shaped groove are all opened on one side of the fixing plate. The bottom end of the first strip-shaped groove is communicated with the top end of the second strip-shaped groove through the inclined groove, and the first strip-shaped groove and the second strip-shaped groove are arranged in parallel.

[0013] As a further improvement of the above solution, the shielding mechanism includes a fixing ring fixedly sleeved on the outer wall of the installation cylinder. An outer gear ring adapted to the second gear is fixedly sleeved on the outer wall of the fixing ring. Two symmetrically arranged stabilizing rods are installed inside the fixing ring. Moving seats are slidably sleeved on the stabilizing rods. A second spring connecting the moving seats and the inner wall of the fixing ring is sleeved on the stabilizing rods. Moving rods are fixedly connected to the bottom ends of the moving seats. Sealing plates located inside the accommodating groove are fixedly connected to one ends of the moving rods. It should be noted here that the sealing plates are equal in size to the accommodating groove, realizing the sealing of the grouting holes by the sealing plates before grouting, avoiding blockage of the grouting holes during the insertion of the grouting pipe, and effectively protecting the grouting holes. The side walls of the moving rods are connected to the grouting pipe through locking members.

[0014] As a further improvement of the above solution, the locking member includes insertion slots equidistantly opened on the outer wall of the grouting pipe. The insertion slots are located above the accommodating groove. Insertion rods extending into the insertion slots are fixedly connected to the side walls of the moving rods. There are two insertion rods.

[0015] As a further improvement of the above solution, the transmission mechanism includes a reverse unit and a lifting unit. The lifting unit includes a stop seat and a socket cylinder sleeved on the outer wall of the rotating cylinder. The stop seat is fixedly connected to the rotating cylinder. The socket cylinder slides on the outer wall of the rotating cylinder. A third spring connecting the bottom end of the stop seat and the top end of the socket cylinder is sleeved outside the rotating cylinder. A pressure ring is fixedly sleeved on the top end of the outer wall of the socket cylinder. An inclined edge is opened at the bottom end of the pressure ring. A third bevel gear is fixedly sleeved on the bottom end of the socket cylinder. Two symmetrically arranged clamping blocks are installed on the inner wall of the socket cylinder. Slots are symmetrically opened on the outer wall of the rotating cylinder. The clamping blocks slide inside the slots, and both the clamping blocks and the slots are rectangular structures.

[0016] As a further improvement of the above solution, the pushing member includes a second connecting seat sleeved on the outer wall of the rotating rod. The second connecting seat is in sliding contact with the bottom end of the fixed seat. One end of the second connecting seat extends into the installation cylinder. A pushing block in sliding contact with the inclined edge is fixedly connected to the bottom end of one side of the second connecting seat.

[0017] As a further improvement of the above solution, the reverse unit includes a third gear fixedly sleeved on the outer wall of the rotating cylinder and located above the stop seat. An internal gear ring sleeved outside the third gear is fixedly connected to the inner wall of the installation cylinder. A fourth gear is rotatably installed on the fixed seat. The fourth gear is meshed with both the internal gear ring and the third gear.

[0018] As a further improvement of the above solution, the expansion unit includes T-shaped grooves symmetrically opened on the side wall of the grouting pipe. An internally threaded cylinder located inside the grouting pipe is rotatably installed inside the T-shaped groove. One end of the internally threaded cylinder is fixedly connected with a bevel gear four, which is adapted to the bevel gear three. A T-shaped threaded rod extending outside the T-shaped groove is inserted inside the internally threaded cylinder. One end of the T-shaped threaded rod is threadedly connected to the internally threaded cylinder. The other end of the T-shaped threaded rod is fixedly connected with a push plate. The push plate is of an arc structure. Ball bearings are equidistantly embedded on the outer wall of the push plate. The ball bearings are in contact with the outer wall of the moving rod. Limiting rods are symmetrically installed on the inner wall of the T-shaped groove. Limiting grooves are symmetrically opened on the outer wall of the T-shaped threaded rod. The limiting rods extend into the limiting grooves, and both the limiting grooves and the limiting rods are of rectangular structures.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. Through the design of the grouting assembly, the fixing plate, the slurry inlet pipe, the electric telescopic rod, the toothed plate, the sliding groove member and the linkage unit, the grouting pipe, the conical head and the spiral cutter rotate during the downward movement, which is convenient for the spiral cutter to break the firm crushed stone soil that hinders the downward movement of the grouting pipe in the prefabricated hole, improves the smoothness of the movement of the grouting pipe, the conical head and the spiral cutter, and effectively solves the problem that the grouting pipe is easily hindered by the firm crushed stone soil inside the prefabricated hole during its penetration, and thus this design effectively facilitates the grouting operation of the grouting pipe.

[0021] 2. Through the cooperative design of the motor, the gear two, the shielding mechanism and the locking member, it is convenient for the motor to drive the grouting pipe to perform synchronous forward and reverse rotation type lateral spraying grouting operation during the forward and reverse rotation, and thus effectively improves the grouting efficiency.

[0022] 3. Through the design of the shielding mechanism, it is convenient to avoid the grouting holes being exposed when the grouting pipe penetrates into the prefabricated hole, and the sealing plate shields the grouting holes, thus solving the problem that the firm crushed stone soil inside the prefabricated hole is easy to block the grouting holes and affect the grouting progress, and thus this design effectively realizes the sealing protection of the grouting holes.

[0023] 4. Through the cooperative design of the mixing mechanism and the reverse rotation unit, it is convenient to realize the reverse rotation of the grouting pipe and the stirring plate during the grouting process, which is convenient for the stirring plate to continuously stir the material, avoids the situation of uneven material mixing due to static placement, effectively improves the grouting quality, and at the same time realizes the scraping of the material adhered to the inner wall of the grouting pipe by the stirring plate. And because the rotation directions of the grouting pipe and the stirring plate are opposite, the scraping efficiency of the material on the inner wall of the grouting pipe is effectively improved, and further the mixing uniformity of the material is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the overall structural schematic diagram of the grouting system for preventing and controlling water disasters caused by overburden failure in coal mines of the present invention;

[0025] Figure 2 for Figure 1 One of the working state diagrams of the grouting assembly;

[0026] Figure 3 for Figure 2 Schematic diagram of some structures in ;

[0027] Figure 4 for Figure 1 Schematic diagram of the working state of the middle grouting component (II);

[0028] Figure 5 It is the connection diagram of the conical head and the mixing mechanism;

[0029] Figure 6 It is a top cross-sectional view of the grouting pipe;

[0030] Figure 7 for Figure 1 A three-dimensional diagram of a grouting device for preventing and controlling overburden water hazards in a coal mine;

[0031] Figure 8 for Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0032] Figure 9 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0033] Figure 10 for Figure 3 Schematic diagram of the enlarged structure at C in the middle;

[0034] Figure 11 for Figure 4 Schematic diagram of the enlarged structure at D in the middle;

[0035] Figure 12 It is the front view of the grouting assembly;

[0036] Figure 13 A bottom view of a portion of the grouting assembly.

[0037] Description of main symbols:

[0038] 1. Support seat; 2. Through port; 3. Top plate; 4. Electric push rod; 5. Fixed plate; 6. Grouting pipe; 7. Electric telescopic rod; 8. Fixed seat; 9. Mounting seat; 10. Mounting tube; 11. Grouting pipe; 12. Conical head; 13. Spiral knife; 14. Conical gear 1; 15. Connecting seat 1; 16. Sleeve; 17. Rotating rod; 18. Conical gear 2; 19. Sliding seat; 20. Gear 1; 21. Tooth plate; 22. Spring 1; 23. Sliding rod; 24. Strip groove 1; 25. Limiting groove; 26. Limiting rod; 27. Inclined groove; 28. Strip groove 2; 29. ​​Accommodating groove; 30. Grouting hole; 31. Sealing plate; 32. Moving rod; 33. Fixed ring ;34. Stabilizing rod;35. Moving seat;36. Spring 2;37. Plug-in rod;38. Plug-in slot;39. Motor;40. Gear 2;41. Inner gear ring;42. Rotating cylinder;43. Gear 3;44. Gear 4;45. Connecting seat 2;46. Stop seat;47. Socket cylinder;48. Pressing ring;49. Push block;50. Push plate;51. Conical gear 3;52. Spring 3;53. Bevel;54. Block;55. Slot;56. Rotating cylinder;57. Groove;58. Convex plate;59. Slurry outlet hole;60. Agitating plate;61. T-slot;62. Inner thread cylinder;63. Conical gear 4;64. T-threaded rod;65. Outer gear ring. DETAILED DESCRIPTION

[0039] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0040] Please combine Figures 1 to 13 A grouting system for preventing and controlling overburden damage and water damage in a coal mine according to the present embodiment comprises a support seat 1, a through opening 2 is provided in the middle of the support seat 1, a top plate 3 is provided above the support seat 1, an electric push rod 4 connected to the top plate 3 is symmetrically installed at the top of the support seat 1, a fixed plate 5, a slurry inlet pipe 6 and an electric telescopic rod 7 are sequentially installed on the top plate 3, the output shaft of the electric telescopic rod 7 is connected to a grouting assembly, a tooth plate 21 and a sliding groove are provided on one side of the fixed plate 5, a motor 39 is installed at the bottom end of the fixed plate 5, and a gear 2 40 is connected to the output shaft of the motor 39;

[0041] The grouting assembly includes a fixed seat 8 installed at the bottom end of the output shaft of the electric telescopic rod 7. A mounting seat 9 is fixedly connected to the bottom end of the fixed seat 8. A mounting cylinder 10 sleeved outside the grout inlet pipe 6 is rotatably connected to the mounting seat 9. A grouting pipe 11 is rotatably installed at the bottom end of the mounting cylinder 10. A conical head 12 is fixedly connected to the bottom end of the grouting pipe 11. A spiral cutter 13 is fixedly connected to the outer wall of the conical head 12. A mixing mechanism located inside the grouting pipe 11 is provided at the top end of the conical head 12. A rotating cylinder 42 is rotatably installed at the middle position of the fixed seat 8. A transmission mechanism connected to the mixing mechanism is provided outside the rotating cylinder 42. Through the design of the mixing mechanism, it is convenient to continuously stir the material during the grouting process, avoid the situation of uneven material mixing due to static placement of the material, and thus effectively improve the grouting quality.

[0042] Receiving grooves 29 are equidistantly formed on the outer wall of the grouting pipe 11. There are four receiving grooves 29. Grouting holes 30 are symmetrically formed on the inner wall of the grouting pipe 11 at equal intervals. The grouting holes 30 communicate with the receiving grooves 29. Through the design of the grouting holes 30, it is convenient for the material entering the interior of the grouting pipe 11 through the grout inlet pipe 6 to be discharged, effectively realizing the grouting operation.

[0043] A first bevel gear 14, a first connecting seat 15 and a shielding mechanism connected to a second gear 40 are successively and fixedly sleeved on the outer wall of the mounting cylinder 10 from top to bottom. The first connecting seat 15 is of an L-shaped structure, and a linkage unit connected to the first bevel gear 14, a toothed plate 21 and a sliding groove member is installed on the first connecting seat 15. Expansion units connected to the transmission mechanism and the shielding mechanism are symmetrically installed on the grouting pipe 11. Through the design of the shielding mechanism, during the process of the grouting pipe 11 penetrating into the prefabricated hole, the grouting holes 30 can be prevented from being in an exposed state, realizing the shielding of the grouting holes 30 by the sealing plate 31, effectively solving the problem that the gravel soil body inside the prefabricated hole blocks the grouting holes 30, and thus this design effectively realizes the sealing protection of the grouting holes 30.

[0044] The linkage unit includes a sleeve 16 rotatably mounted on the first connecting seat 15. A first gear 20 meshingly connected with the toothed plate 21 is fixedly sleeved on the outer wall of the sleeve 16. A rotating rod 17 is slidably inserted into the interior of the sleeve 16. A second bevel gear 18 meshingly connected with the first bevel gear 14 is fixedly connected to one end of the rotating rod 17. A sliding seat 19 is rotatably mounted at the other end of the rotating rod 17. A sliding rod 23 connected with the sliding groove member in a sliding manner is fixedly mounted on the sliding seat 19. A first spring 22 connecting the side wall of the sleeve 16 and the side wall of the sliding seat 19 is sleeved outside the rotating rod 17. A pushing member connected with the transmission mechanism is rotatably mounted on the rotating rod 17. Limiting rods 26 are symmetrically mounted on the outer wall of the rotating rod 17. Limiting grooves 25 are symmetrically formed in the inner wall of the sleeve 16. The limiting rods 26 slide inside the limiting grooves 25, and both the limiting rods 26 and the limiting grooves 25 are of rectangular structures. The sliding groove member includes a first strip-shaped groove 24, an inclined groove 27, and a second strip-shaped groove 28 arranged in sequence from top to bottom. The first strip-shaped groove 24, the inclined groove 27, and the second strip-shaped groove 28 are all formed on one side of the fixing plate 5. The bottom end of the first strip-shaped groove 24 is communicated with the top end of the second strip-shaped groove 28 through the inclined groove 27, and the first strip-shaped groove 24 and the second strip-shaped groove 28 are arranged in parallel;

[0045] First, a drill is used to drill holes in the coal mine overburden rock formation. Then, the electric telescopic rod 7 is started. The electric telescopic rod 7 will drive the fixed seat 8, the mounting seat 9, the mounting cylinder 10, the grouting pipe 11, the conical head 12, and the spiral cutter 13 to move downward synchronously, facilitating the penetration of the grouting pipe 11, the conical head 12, and the spiral cutter 13 into the prefabricated holes drilled by the drill. During the downward movement, the mounting cylinder 10 will also rotate. The mounting cylinder 10 will drive the grouting pipe 11 to rotate synchronously through the shielding mechanism. The grouting pipe 11 will drive the conical head 12 and the spiral cutter 13 to rotate synchronously, enabling the grouting pipe 11, the conical head 12, and the spiral cutter 13 to rotate continuously during the downward movement, facilitating the spiral cutter 13 to break the crushed stone soil mass that obstructs the downward movement of the grouting pipe 11 in the prefabricated holes, thereby improving the moving smoothness of the grouting pipe 11, the conical head 12, and the spiral cutter 13, effectively solving the problem that the grouting pipe 11 is easily obstructed by the crushed stone soil mass inside the prefabricated holes during the penetration process, which affects the grouting efficiency. As the grouting pipe 11 continues to move downward, the mounting cylinder 10 will drive the external gear ring 65 to mesh with the second gear 40. At this time, the operation of the electric telescopic rod 7 is stopped, effectively completing the penetration operation of the grouting pipe 11 in the prefabricated holes and facilitating the grouting operation of the grouting pipe 11 in the coal mine overburden rock formation in the prefabricated holes.

[0046] The mixing mechanism includes a rotating cylinder 56 rotatably installed at the top of the conical head 12. The rotating cylinder 56 extends into the interior of the rotating cylinder 42 and is sleeved outside the slurry inlet pipe 6. Symmetric convex plates 58 are provided at the top of the outer wall of the rotating cylinder 56. Symmetric grooves 57 sleeving the outer walls of the convex plates 58 are formed in the inner wall of the rotating cylinder 42. The convex plates 58 slide on the inner walls of the grooves 57. A diversion seat is fixedly connected inside the rotating cylinder 56. The diversion seat is of a conical structure. Equal-distance slurry outlet holes 59 are formed in the outer wall of the rotating cylinder 56 on one side of the diversion seat. Stirring plates 60 in sliding contact with the inner wall of the grouting pipe 11 are symmetrically installed on the outer wall of the rotating cylinder 56; The reverse rotation unit includes a third gear 43 fixedly sleeved on the outer wall of the rotating cylinder 42 and located above the stop seat 46. An internal gear ring 41 sleeving the outside of the third gear 43 is fixedly connected to the inner wall of the installation cylinder 10. A fourth gear 44 is rotatably installed on the fixed seat 8. The fourth gear 44 is meshed with both the internal gear ring 41 and the third gear 43;

[0047] When the grouting pipe 11 moves down into the prefabricated hole, the motor 39 is started, which will drive the installation cylinder 10 to drive the grouting pipe 11 to rotate synchronously, facilitating the rotational grouting operation of the grouting pipe 11. It will also stir the materials inside the grouting pipe 11 by the stirring plates 60, and at the same time scrape the materials adhered to the inner wall of the grouting pipe 11 by the stirring plates 60. Through the reverse rotation of the grouting pipe 11 and the stirring plates 60, the mixing uniformity of the materials is further improved.

[0048] The shielding mechanism includes a fixed ring 33 fixedly sleeved on the outer wall of the installation cylinder 10. An external gear ring 65 adapted to the second gear 40 is fixedly sleeved on the outer wall of the fixed ring 33. Two symmetrically arranged stabilizing rods 34 are installed inside the fixed ring 33. Moving seats 35 are slidably sleeved on the stabilizing rods 34. It should be noted here that the stabilizing rods 34 are of a rectangular structure, effectively improving the moving stability of the moving seats 35. Spring two 36 connecting the moving seats 35 and the inner wall of the fixed ring 33 is sleeved on the stabilizing rods 34. Moving rods 32 are fixedly connected to the bottom ends of the moving seats 35. Sealing plates 31 located inside the receiving groove 29 are fixedly connected to one ends of the moving rods 32. It should be noted here that the sealing plates 31 are equal in size to the receiving groove 29, realizing the sealing of the grouting hole 30 by the sealing plates 31 before grouting, and avoiding the blockage of the grouting hole 30 during the insertion of the grouting pipe 11, effectively protecting the grouting hole 30. The side walls of the moving rods 32 and the grouting pipe 11 are connected by locking members. The locking members include insertion slots 38 equidistantly formed in the outer wall of the grouting pipe 11. The insertion slots 38 are located above the receiving groove 29. Insertion rods 37 extending into the insertion slots 38 are fixedly connected to the side walls of the moving rods 32. There are two insertion rods 37.

[0049] The transmission mechanism includes a reverse unit and a lifting unit. The lifting unit includes a stop seat 46 sleeved on the outer wall of the rotating cylinder 42 and a socket cylinder 47. The stop seat 46 is fixedly connected to the rotating cylinder 42. The socket cylinder 47 slides on the outer wall of the rotating cylinder 42. A third spring 52 connecting the bottom end of the stop seat 46 and the top end of the socket cylinder 47 is sleeved outside the rotating cylinder 42. The top end of the outer wall of the socket cylinder 47 is fixedly sleeved with a pressing ring 48. An inclined edge 53 is provided at the bottom end of the pressing ring 48. A third bevel gear 51 is fixedly sleeved at the bottom end of the socket cylinder 47. Two clamping blocks 54 are symmetrically installed on the inner wall of the socket cylinder 47. Two clamping grooves 55 are symmetrically provided on the outer wall of the rotating cylinder 42. The clamping blocks 54 slide inside the clamping grooves 55, and both the clamping blocks 54 and the clamping grooves 55 are rectangular structures. The pusher includes a second connecting seat 45 sleeved on the outer wall of the rotating rod 17. The second connecting seat 45 is in sliding contact with the bottom end of the fixed seat 8. One end of the second connecting seat 45 extends into the installation cylinder 10. A pushing block 49 in sliding contact with the inclined edge 53 is fixedly connected to the bottom end of one side of the second connecting seat 45.

[0050] The expansion unit includes T-shaped grooves 61 symmetrically provided on the side wall of the grouting pipe 11. An internally threaded cylinder 62 located inside the grouting pipe 11 is rotatably installed inside the T-shaped grooves 61. A fourth bevel gear 63 is fixedly connected to one end of the internally threaded cylinder 62. The fourth bevel gear 63 is adapted to the third bevel gear 51. A T-shaped threaded rod 64 extending outside the T-shaped groove 61 is inserted into the internally threaded cylinder 62. One end of the T-shaped threaded rod 64 is threadedly connected to the internally threaded cylinder 62. A push plate 50 is fixedly connected to the other end of the T-shaped threaded rod 64. The push plate 50 is of an arc-shaped structure. A plurality of balls are equidistantly embedded on the outer wall of the push plate 50. The balls are in contact with the outer wall of the moving rod 32. Two limiting rods 26 are symmetrically installed on the inner wall of the T-shaped groove 61. Two limiting grooves 25 are symmetrically provided on the outer wall of the T-shaped threaded rod 64. The limiting rods 26 extend into the limiting grooves 25, and both the limiting grooves 25 and the limiting rods 26 are rectangular structures.

[0051] After the sliding rod 23 continues to slide and moves into the second strip-shaped groove 28, the motor 39 is started, which will cause the push plate 50 to drive the moving rod 32 away from the grouting pipe 11. The moving rod 32 will drive the sealing plate 31 away from the receiving groove 29, thereby disconnecting the shielding of the grouting hole 30 by the sealing plate 31 and opening the grouting hole 30. At the same time, as the motor 39 continues to operate, the sealing plate 31 will move into the other two receiving grooves 29 for storage, and at the same time, the insertion rod 37 will be inserted into the other two insertion grooves 38 on the outer wall of the grouting pipe 11, and the connection between the grouting pipe 11 and the installation cylinder 10 will be realized again. The rotation of the grouting pipe 11 is synchronized with the rotation of the installation cylinder 10. Then, the motor 39 is controlled to perform alternating forward and reverse rotations, effectively providing the possibility for the reciprocating movement of the push plate 50, and at the same time, the grouting pipe 11 performs forward and reverse rotational lateral spraying grouting operations, effectively improving the grouting efficiency.

[0052] In the embodiment of the present application, the implementation principle of a grouting system for preventing and controlling water disasters caused by overburden failure in coal mines is as follows: First, a drilling machine is used to drill holes in the overburden layer of the coal mine. Then, the electric telescopic rod 7 is started, and the electric telescopic rod 7 will drive the fixed seat 8, the mounting seat 9, the mounting cylinder 10, the grouting pipe 11, the conical head 12, and the spiral cutter 13 to move downward synchronously, facilitating the penetration of the grouting pipe 11, the conical head 12, and the spiral cutter 13 into the pre-drilled holes drilled by the drilling machine. During the downward movement, the first gear 20 will move downward on one side of the toothed plate 21, and the sliding rod 23 will slide inside the first strip-shaped groove 24. Through the meshing connection between the first gear 20 and the toothed plate 21, the first gear 20 will rotate. The first gear 20 drives the sleeve 16 to rotate. Through the clamping effect of the limiting groove 25 and the limiting rod 26, it is convenient to make the sleeve 16 drive the rotating rod 17 to rotate synchronously. The rotating rod 17 will drive the second bevel gear 18 to rotate. Through the meshing connection between the second bevel gear 18 and the first bevel gear 14, the first bevel gear 14 will drive the mounting cylinder 10 to rotate. The mounting cylinder 10 will drive the grouting pipe 11 to rotate synchronously through the shielding mechanism. The grouting pipe 11 will drive the conical head 12 and the spiral cutter 13 to rotate synchronously, so that the grouting pipe 11, the conical head 12, and the spiral cutter 13 rotate during the downward movement, facilitating the spiral cutter 13 to break the firm crushed stone soil that hinders the downward movement of the grouting pipe 11 in the pre-drilled hole, improving the smoothness of the movement of the grouting pipe 11, the conical head 12, and the spiral cutter 13, and effectively solving the problem that the grouting efficiency is affected due to the obstruction of the crushed stone soil inside the pre-drilled hole during the penetration of the grouting pipe 11 in the pre-drilled hole;

[0053] As the grouting pipe 11 continues to move downward, the sliding rod 23 will move into the inclined groove 27. Due to the inclined design of the sliding rod 23, the sliding rod 23 will drive the sliding seat 19 to move horizontally during the downward movement, making the sliding seat 19 drive the rotating rod 17 to move horizontally, and the first spring 22 will generate elastic force. At the same time, the rotating rod 17 will drive the second bevel gear 18 to move horizontally synchronously, causing the second bevel gear 18 to disengage from the meshing connection with the first bevel gear 14. When the sliding rod 23 moves into the second strip-shaped groove 28, the mounting cylinder 10 will drive the external gear ring 65 to mesh with the second gear 40. At this time, the operation of the electric telescopic rod 7 is stopped, which provides convenience for the grouting pipe 11 to perform grouting operations on the overburden layer of the coal mine in the pre-drilled hole;

[0054] When the outer gear ring 65 is meshed and connected with the second gear 40, the motor 39 is started at this time. The motor 39 drives the second gear 40 to rotate, the second gear 40 drives the outer gear ring 65 to rotate, the outer gear ring 65 drives the fixed ring 33 to rotate, the fixed ring 33 drives the mounting cylinder 10 to rotate, the mounting cylinder 10 drives the inner gear ring 41 to rotate, the inner gear ring 41 drives the fourth gear 44 to rotate, the fourth gear 44 drives the third gear 43 to rotate, and the third gear 43 drives the rotating cylinder 42 to rotate. Through the clamping action of the clamping groove 55 and the clamping block 54, the rotating cylinder 42 will drive the socket cylinder 47 to rotate, and the socket cylinder 47 will drive the pressure ring 48 and the third bevel gear 51 to rotate synchronously, facilitating the rotation of the hypotenuse 53 at the bottom end of the pressure ring 48 on the inclined surface of the push block 49. And the rotation direction of the third bevel gear 51 is opposite to that of the grouting pipe 11. The rotation of the grouting pipe 11 will drive the internal thread cylinder 62 and the fourth bevel gear 63 to rotate synchronously. And through the meshing connection relationship between the third bevel gear 51 and the fourth bevel gear 63, the fourth bevel gear 63 will drive the internal thread cylinder 62 to rotate. Through the threaded connection relationship between the internal thread cylinder 62 and the T-shaped threaded rod 64 and the connection relationship of the matching limit groove 25 and the limit rod 26, the T-shaped threaded rod 64 will move horizontally in the internal thread cylinder 62. The T-shaped threaded rod 64 will drive the push plate 50 to move, and then the two push plates 50 will move away from each other. The push plate 50 will drive the moving rod 32 away from the grouting pipe 11, and the moving rod 32 will drive the sealing plate 31 away from the receiving groove 29, thereby effectively disconnecting the shielding of the grouting hole 30 by the sealing plate 31 and providing the possibility for the grouting operation. At the same time, the moving rod 32 will drive the moving seat 35 to slide on the stabilizing rod 34, causing the second spring 36 to generate elastic force, and the moving rod 32 will drive the insertion rod 37 to disengage from the insertion slot 38, thereby disconnecting the synchronization of the rotation of the mounting cylinder 10 driving the grouting pipe 11, effectively providing the possibility for the sealing plate 31 to move into the other two receiving grooves 29 for storage;

[0055] As the motor 39 continues to operate, the outer gear ring 65 will drive the fixed ring 33 to rotate, and the fixed ring 33 will drive the installation cylinder 10 to continue rotating. However, since the insertion slot 38 is disengaged from the insertion rod 37, the fixed ring 33 will drive the moving rod 32 and the sealing plate 31 to rotate outside the grouting pipe 11. At this time, the grouting pipe 11 does not rotate synchronously with the installation cylinder 10. Furthermore, the sealing plate 31 can move and change its position outside the grouting pipe 11. During the rotation of the moving rod 32, it will move on the outer wall of the push plate 50. Since the push plate 50 is designed with an arc-shaped structure, when the fixed ring 33 drives the moving rod 32 to rotate to the positions of the other two receiving slots 29 outside the grouting pipe 11, the moving rod 32 will be disengaged from the contact with the outer wall of the push plate 50. Under the action of the second spring 36, the moving rod 32 will approach the grouting pipe 11. Then, the moving rod 32 will drive the sealing plate 31 to move into the other two receiving slots 29 for storage. At the same time, the moving rod 32 will also drive the insertion rod 37 to insert into the other two insertion slots 38 on the outer wall of the grouting pipe 11, and the connection between the grouting pipe 11 and the installation cylinder 10 is realized again, facilitating the synchronous rotation of the grouting pipe 11 during the rotation of the installation cylinder 10, effectively providing convenience for the rotary grouting operation of the grouting pipe 11. Then, control the motor 39 to perform alternating forward and reverse rotations, effectively providing the possibility for the reciprocating movement of the push plate 50, and at the same time making the grouting pipe 11 perform forward and reverse rotational lateral spraying grouting operations, effectively improving the grouting efficiency;

[0056] By the operation of the motor 39, the installation cylinder 10 will drive the grouting pipe 11 to rotate synchronously, facilitating the material passing through the feed pipe 6 to fall into the rotary cylinder 56, and flowing into the interior of the grouting pipe 11 through the slurry outlet holes 59 under the action of the diversion seat. During the rotation of the grouting pipe 11, the material will be laterally thrown out through the grouting holes 30, facilitating the rotary grouting operation of the grouting pipe 11 and effectively accelerating the grouting efficiency. The rotation of the installation cylinder 10 will drive the internal gear ring 41 to rotate. Through the meshing connection relationship between the internal gear ring 41 and the fourth gear 44, the fourth gear 44 will rotate. Through the meshing connection relationship between the fourth gear 44 and the third gear 43, the rotating cylinder 42 will rotate, and the rotation direction of the rotating cylinder 42 is opposite to that of the grouting pipe 11. Through the clamping action between the groove 57 and the convex plate 58, the rotating cylinder 42 will drive the rotary cylinder 56 to rotate synchronously. The rotary cylinder 56 will drive the stirring plate 60 to rotate in the opposite direction inside the grouting pipe 11, facilitating the stirring of the material inside the grouting pipe 11 by the stirring plate 60, and at the same time realizing the scraping of the material adhered to the inner wall of the grouting pipe 11 by the stirring plate 60. Through the reverse rotation of the grouting pipe 11 and the stirring plate 60, the scraping efficiency of the material on the inner wall of the grouting pipe 11 is effectively improved.

[0057] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention belong to the scope of protection required by the present invention.

Claims

1. A grouting system for preventing and controlling overburden damage in coal mines, characterized in that: It includes a support seat, a through opening is opened in the middle position of the support seat, a top plate is arranged above the support seat, an electric push rod connected to the top plate is symmetrically installed on the top of the support seat, a fixed plate, a slurry inlet pipe and an electric telescopic rod are sequentially installed on the top plate, the output shaft of the electric telescopic rod is connected to the grouting assembly, a tooth plate and a sliding groove are arranged on one side of the fixed plate, a motor is installed at the bottom end of the fixed plate, and a gear 2 is connected to the output shaft of the motor; The grouting assembly includes a fixed seat installed at the bottom end of the output shaft of the electric telescopic rod, the bottom end of the fixed seat is fixedly connected to a mounting seat, a mounting cylinder sleeved on the outside of the grouting pipe is rotatably connected to the mounting seat, a grouting pipe is rotatably installed at the bottom end of the mounting cylinder, a conical head is fixedly connected to the bottom end of the grouting pipe, a spiral knife is fixedly connected to the outer wall of the conical head, a mixing mechanism located inside the grouting pipe is provided at the top end of the conical head, a rotating cylinder is rotatably installed at the middle position of the fixed seat, and a transmission mechanism connected to the mixing mechanism is provided on the outside of the rotating cylinder; The outer wall of the grouting pipe is provided with receiving grooves at equal distances, and there are four receiving grooves. The inner wall of the grouting pipe is symmetrically provided with grouting holes arranged at equal distances, and the grouting holes are connected with the receiving grooves. The outer wall of the installation tube is fixedly sleeved with a bevel gear 1, a connecting seat 1 and a shielding mechanism connected to the gear 2 in sequence from top to bottom. The connecting seat 1 is an L-shaped structure, and a linkage unit connected to the bevel gear 1, the tooth plate and the sliding groove is installed on the connecting seat 1. An expansion unit connected to the transmission mechanism and the shielding mechanism is symmetrically installed on the grouting pipe. The linkage unit includes a sleeve rotatably mounted on a connecting seat, a gear 1 meshing with a toothed plate is fixedly sleeved on the outer wall of the sleeve, a rotating rod is slidably inserted into the interior of the sleeve, one end of the rotating rod is fixedly connected to a bevel gear 2 meshing with a bevel gear 1, a sliding seat is rotatably mounted on the other end of the rotating rod, a sliding rod slidably connected to a sliding groove is fixedly mounted on the sliding seat, a spring 1 connected to the side wall of the sleeve and the side wall of the sliding seat is sleeved on the outside of the rotating rod, and a pushing member connected to a transmission mechanism is rotatably mounted on the rotating rod.

2. The grouting system for preventing and controlling overburden damage and water damage in coal mines according to claim 1, characterized in that: The mixing mechanism includes a rotating cylinder rotatably mounted on the top of the conical head, the rotating cylinder extends to the interior of the rotating cylinder and is sleeved on the outside of the slurry inlet pipe, convex plates are symmetrically arranged on the top of the outer wall of the rotating cylinder, and grooves sleeved on the outer wall of the convex plates are symmetrically opened on the inner wall of the rotating cylinder, and the convex plates slide on the inner walls of the grooves. A guide seat is fixedly connected to the interior of the rotating cylinder, and the guide seat is a conical structure. Slurry outlet holes located on one side of the guide seat are equidistantly opened on the outer wall of the rotating cylinder, and stirring plates that are in sliding contact with the inner wall of the grouting pipe are symmetrically installed on the outer wall of the rotating cylinder.

3. The grouting system for preventing and controlling water damage in coal mine overburden damage according to claim 1, characterized in that: The outer wall of the rotating rod is symmetrically installed with a limiting rod, the inner wall of the sleeve is symmetrically provided with a limiting groove, the limiting rod slides inside the limiting groove, and both the limiting rod and the limiting groove are rectangular structures.

4. The grouting system for preventing and controlling water damage in coal mine overburden damage according to claim 1, characterized in that: The sliding groove member includes a strip groove 1, an inclined groove and a strip groove 2 arranged in sequence from top to bottom. The strip groove 1, the inclined groove and the strip groove 2 are all opened on one side of the fixed plate. The bottom end of the strip groove 1 is connected to the top end of the strip groove 2 through the inclined groove, and the strip groove 1 is arranged in parallel with the strip groove 2.

5. The grouting system for preventing and controlling water damage in coal mine overburden damage according to claim 1, characterized in that: The shielding mechanism includes a fixing ring fixedly sleeved on the outer wall of the mounting tube, the outer wall of the fixing ring is fixedly sleeved with an outer gear ring matched with the second gear, two symmetrically arranged stabilizing rods are installed inside the fixing ring, each stabilizing rod is slidably sleeved with a moving seat, the stabilizing rod is sleeved with two springs connected with the moving seat and the inner wall of the fixing ring, the bottom end of the moving seat is fixedly connected with a moving rod, one end of the moving rod is fixedly connected with a sealing plate located inside the accommodating groove, and the side wall of the moving rod is connected to the grouting pipe by a locking piece.

6. The grouting system for preventing and controlling water damage in overburden rock in coal mines according to claim 5, characterized in that: The locking piece comprises plugging grooves which are equidistantly arranged on the outer wall of the grouting pipe, the plugging grooves are located above the accommodating grooves, the side walls of the moving rods are fixedly connected with plugging rods which extend into the plugging grooves, and two plugging rods are provided.

7. The grouting system for preventing and controlling water damage in overburden rock in coal mines according to claim 1, characterized in that: The transmission mechanism includes a reversing unit and a lifting unit. The lifting unit includes a stop seat and a sleeve tube which are sleeved on the outer wall of the rotating cylinder. The stop seat is fixedly connected to the rotating cylinder, and the sleeve tube slides on the outer wall of the rotating cylinder. The outer part of the rotating cylinder is sleeved with a spring three which is connected with the bottom end of the stop seat and the top end of the sleeve tube. A pressure ring is fixedly sleeved on the top end of the outer wall of the sleeve tube, and a bevel is provided at the bottom end of the pressure ring. A bevel gear three is fixedly sleeved on the bottom end of the sleeve tube. Blocks are symmetrically installed on the inner wall of the sleeve tube, and slots are symmetrically provided on the outer wall of the rotating cylinder. The block slides inside the slot, and both the block and the slot are rectangular structures.

8. The grouting system for preventing and controlling overburden damage and water damage in coal mines according to claim 7, characterized in that: The pushing member includes a connecting seat 2 which is sleeved on the outer wall of the rotating rod. The connecting seat 2 is in sliding contact with the bottom end of the fixed seat. One end of the connecting seat 2 extends to the inside of the mounting tube. A pushing block which is in sliding contact with the bevel is fixedly connected to the bottom end of one side of the connecting seat 2.

9. The grouting system for preventing and controlling water damage in coal mine overburden damage as claimed in claim 7, characterized in that: The reversing unit includes a gear three fixedly sleeved on the outer wall of the rotating cylinder and located above the stop seat, an inner gear ring sleeved on the outside of the gear three is fixedly connected to the inner wall of the mounting cylinder, a gear four is rotatably mounted on the fixed seat, and the gear four is respectively meshed with the inner gear ring and the gear three.

10. The grouting system for preventing and controlling water damage in coal mine overburden damage according to claim 7, characterized in that: The expansion unit includes a T-slot symmetrically opened on the side wall of the grouting pipe, an internal threaded barrel located inside the grouting pipe is rotatably installed inside the T-slot, a bevel gear four is fixedly connected to one end of the internal threaded barrel, and the bevel gear four is adapted to the bevel gear three, a T-shaped threaded rod extending to the outside of the T-slot is inserted into the inside of the internal threaded barrel, one end of the T-shaped threaded rod is threadedly connected to the internal threaded barrel, and a push plate is fixedly connected to the other end of the T-shaped threaded rod, the push plate is an arc structure, and balls are embedded in the outer wall of the push plate at equal distances, and the balls are in contact with the outer wall of the moving rod, and a limiting rod is symmetrically installed on the inner wall of the T-slot, and limiting grooves are symmetrically opened on the outer wall of the T-shaped threaded rod, and the limiting rod extends to the inside of the limiting groove, and the limiting groove and the limiting rod are both rectangular structures.

Images