A drilling rig for grouting bolts in coal mine roadways

Abstract

The present invention discloses a drilling rig device for grouting bolts in coal mine roadways, including a vehicle body. A lifting frame is fixed on the vehicle body. A sliding table is fixed in the lifting platform of the lifting frame. On both sides of the sliding table, slide rails perpendicular to the traveling direction of the vehicle body are slidably provided respectively. In the two slide rails, grouting drilling table assemblies are slidably provided respectively. The grouting drilling table assemblies are connected to an external grouting pump through grouting pipes. The two grouting drilling table assemblies are connected together by four equal-length connecting rods that are hinged to form a rhombus. The two hinge points of the connecting rods located on the center line of the traveling direction of the vehicle body are respectively hinged through a nut hinge plate. The hollow bolts connected in the two grouting drilling table assemblies can simultaneously drill into the two side walls of the coal mine roadway in the opposite direction, providing reaction forces for each other to improve the stability during drilling. And the moving position of the clamping block enables the hollow bolt to be first clamped and then fit with the fitting pipe to ensure the stability of the grouting bolt during fitting.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine reinforcement equipment, and specifically to a drilling rig for grouting bolts in coal mine roadways. Background Art

[0002] Coal mine roadways are usually reinforced with bolts, which can anchor the rock strata to prevent loosening and collapse from causing accidents and ensure the smooth and safe progress of coal mining work. Due to the space limitation in the roadway, the existing grouting bolt drilling rigs are difficult to enter the roadway to anchor the side walls. Usually, hand-held drilling rigs are used to drive in the bolts, resulting in slow construction speed and low efficiency.

[0003] Therefore, it is necessary to provide a drilling rig for grouting bolts in coal mine roadways to solve the problems raised in the above background art. Summary of the Invention

[0004] To achieve the above object, the present invention provides the following technical solution: A drilling rig for grouting bolts in coal mine roadways, including a vehicle body, on which a lifting frame is fixed. A sliding table is fixed in the lifting platform of the lifting frame. On both sides of the sliding table, slide rails perpendicular to the traveling direction of the vehicle body are slidably provided. In the two slide rails, grouting drill table assemblies are respectively slidably provided. The grouting drill table assemblies are connected to an external grouting pump through grouting pipes.

[0005] Further, preferably, the two grouting drill table assemblies are connected together by four equal-length connecting rods hinged to form a rhombus. The two hinge points of the connecting rods located on the center line of the traveling direction of the vehicle body are respectively hinged through a nut hinge plate.

[0006] Further, preferably, nuts are fixed on the two nut hinge plates and are jointly penetrated by a guide shaft. Threads threadedly connected to the nut hinge plates are provided in two sections of the guide shaft corresponding to the two nut hinge plates, and the helix directions of the two threads are opposite.

[0007] Further, preferably, a vertical guide rail is fixed in the vehicle body. A connecting seat is slidably provided in the guide rail. The connecting seat is rotatably connected to the guide shaft, and the guide shaft penetrates to the other end of the connecting seat. A guide motor capable of driving the guide shaft to rotate is fixed in the connecting seat.

[0008] Further, preferably, the grouting drill table assembly includes a housing, which is slidably connected to the slide rail, and a rotating cylinder is rotatably arranged therein. A plurality of moving blocks that can move radially along the rotating cylinder are circumferentially distributed at one end of the rotating cylinder away from the slide table. A clamping block slidably connected to the rotating cylinder is arranged under each moving block. A threaded pipe is rotatably arranged at one end of the rotating cylinder away from the clamping block. Threads in opposite directions are provided on the inner and outer walls of the threaded pipe. A gear is fixed at one end of the threaded pipe outside the rotating cylinder, and the gear can be driven by a rotating cylinder motor fixed outside the housing.

[0009] Further, preferably, a plurality of rotatable rotating arms are circumferentially distributed in the rotating cylinder. One end of the rotating arm presses on the moving block, and the other end fits in the sleeve. An inclined groove is provided at the joint of the sleeve and the rotating arm. The inclined groove slopes downward from the direction away from the clamping block. The sleeve is axially slidable and rotationally restrictedly connected to the rotating cylinder, and internal threads threadedly connected to the threaded pipe are provided on the inner wall of the sleeve.

[0010] Further, preferably, a fitting pipe axially slidable and rotationally restrictedly connected to the rotating cylinder is arranged at the center of the rotating cylinder. One end of the fitting pipe close to the gear penetrates to the other side of the gear and is connected to the grouting pipe through a pipe bearing. The pipe bearing is slidable and rotationally restrictedly connected to the housing. One end of the fitting pipe close to the clamping block has a chamfer that expands outward, and external threads threadedly connected to the threaded pipe are provided on the outer wall of the fitting pipe.

[0011] Further, preferably, a first set of engaging teeth is circumferentially fixed to the end face of the sleeve close to the gear, and a second set of engaging teeth is also circumferentially embedded in the end face of the gear close to the sleeve.

[0012] Further, preferably, the bottom of the second set of engaging teeth is telescopically embedded in the gear through a spring, and an electromagnet fixed in the housing is arranged on the side of the gear away from the second set of engaging teeth.

[0013] Further, preferably, the surface of the moving block that fits with the clamping block is an inclined surface that slopes downward toward the rotating arm. An adjusting screw threadedly connected to the clamping block penetrates through the clamping block, and the end of the adjusting screw fits with the moving block.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] In the present invention, when the guide shaft rotates, the two nut hinge plates can be moved closer to or away from each other, so as to drive the two grouting drill table assemblies to move closer to or away from each other, so that the hollow anchor rods connected in the two grouting drill table assemblies can be simultaneously drilled into the two side walls of the coal mine roadway in opposite directions, providing reaction forces for each other to improve the stability during drilling.

[0016] In the present invention, since the thread directions on the inner and outer walls of the threaded pipe are opposite, when the clamping blocks close to clamp the hollow anchor rod, the fitting pipe approaches the hollow anchor rod and fits with it, so as to be able to grout into the hollow anchor rod. On the contrary, when the clamping blocks open, the fitting pipe moves away from the hollow anchor rod, and the moving position of the clamping blocks enables the hollow anchor rod to be first clamped and then fit with the fitting pipe, so as to ensure the stability of the grouting anchor rod during fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a drilling rig device for a grouting anchor rod in a coal mine roadway;

[0018] Figure 2 is a schematic structural diagram inside the grouting drill table assembly;

[0019] Figure 3 is a schematic cross-sectional structural diagram of the grouting drill table assembly;

[0020] In the figure: 1, vehicle body; 2, lifting frame; 3, sliding table; 4, sliding rail; 5, grouting drill table assembly; 6, connecting rod; 7, guiding shaft; 8, nut hinge plate; 9, vertical sliding rail; 10, connecting seat; 11, guiding motor; 12, drum motor; 13, grouting pipe; 51, drum; 52, threaded pipe; 53, rotating arm; 54, moving block; 55, clamping block; 551, adjusting screw; 56, gear; 561, second engaging tooth; 562, electromagnet; 57, pipe bearing; 58, sleeve; 581, inclined groove; 582, first engaging tooth; 59, fitting pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Please refer to Figure 1 , in an embodiment of the present invention, a drilling rig device for a grouting anchor rod in a coal mine roadway includes a vehicle body 1, a lifting frame 2 is fixed on the vehicle body 1, a sliding table 3 is fixed in the lifting platform of the lifting frame 2, sliding rails 4 perpendicular to the traveling direction of the vehicle body 1 are slidably provided on both sides of the sliding table 3, and grouting drill table assemblies 5 are slidably provided in the two sliding rails 4 respectively. The grouting drill table assemblies 5 are connected to an external grouting pump through grouting pipes 13.

[0022] In this embodiment, the two grouting drill table assemblies 5 are connected together by four equal-length connecting rods 6 hinged to form a rhombus. The two hinge points of the connecting rods 6 located on the center line of the traveling direction of the vehicle body 1 are each hinged through a nut hinge plate 8.

[0023] In this embodiment, nuts are fixed on the two nut hinge plates 8 and are jointly penetrated by the guide shaft 7. Threads for threaded connection with the nut hinge plates 8 are provided on two sections of the guide shaft 7 corresponding to the positions of the two nut hinge plates 8, and the helix directions of the two threads are opposite. That is to say, when the guide shaft 7 rotates, the two nut hinge plates 8 can be moved closer to or away from each other, thereby driving the two grouting drill table assemblies 5 to move closer to or away from each other.

[0024] In this embodiment, a vertical vertical guide rail 9 is fixed in the vehicle body 1. A connecting seat 10 is slidably arranged in the vertical guide rail 9. The connecting seat 10 is rotatably connected to the guide shaft 7, and the guide shaft 7 penetrates to the other end of the connecting seat 10. A guide motor 11 capable of driving the guide shaft 7 to rotate is fixed in the connecting seat 10. The connecting seat 10 can move up and down with the lifting frame 2, so that the guide motor 11 can drive the guide shaft 7 to rotate at any position to push the grouting drill table assembly 5 to move to both sides.

[0025] Please refer to Figure 2 and Figure 3 , in this embodiment, the grouting drill table assembly 5 includes a housing. The housing is slidably connected to the slide rail 4. A rotating cylinder 51 is rotatably arranged inside the housing. A plurality of moving blocks 54 capable of moving radially along the rotating cylinder 51 are circumferentially distributed at one end of the rotating cylinder 51 away from the slide table 3. A clamping block 55 slidably connected to the rotating cylinder 51 is arranged under each moving block 54. A threaded pipe 52 is rotatably arranged at one end of the rotating cylinder 51 away from the clamping block 55. Threads in opposite directions are provided on the inner and outer walls of the threaded pipe 52. A gear 56 is fixed at the end of the threaded pipe 52 outside the rotating cylinder 51. The gear 56 can be driven by a rotating cylinder motor 12 fixed outside the housing.

[0026] In this embodiment, a plurality of rotatable rotating arms 53 are circumferentially distributed inside the rotating cylinder 51. One end of the rotating arm 53 presses on the moving block 54, and the other end fits in the sleeve 58. A bevel groove 581 is provided at the fitting position of the sleeve 58 and the rotating arm 53. The bevel groove 581 slopes downward from the direction away from the clamping block 55. The sleeve 58 is axially slidable and rotationally restrictedly connected to the rotating cylinder 51. Threads for threaded connection with the threaded pipe 52 are provided on the inner wall of the sleeve 58. That is to say, when the gear 56 and the threaded pipe 52 rotate, the sleeve 58 can be driven to axially slide, thereby changing the fitting point of the bevel groove 581 and the rotating arm 53, causing the rotating arm 53 to rotate, and further causing the moving block 54 and the clamping block 55 to move radially along the rotating cylinder 51 to open or close, so as to clamp or release the hollow anchor rod between the clamping blocks 55.

[0027] In this embodiment, a fitting tube 59 is provided at the center of the rotary drum 51, which is axially slidable and rotatably restrictedly connected thereto. One end of the fitting tube 59 close to the gear 56 penetrates to the other side of the gear 56 and is connected to the grouting pipe 13 through a pipe bearing 57. The pipe bearing 57 is slidably and rotatably restrictedly connected to the housing. One end of the fitting tube 59 close to the clamping block 55 has a chamfer that expands outward. Threads are provided on the outer wall of the fitting tube 59 that are threadedly connected to the threaded tube 52. That is to say, when the gear 56 and the threaded tube 52 rotate, they can drive the fitting tube 59 to axially slide, so that the fitting tube 59 approaches or moves away from the hollow anchor bolt clamped by the clamping block 55. Since the thread directions on the inner and outer walls of the threaded tube 52 are opposite, when the clamping block 55 closes to clamp the hollow anchor bolt, the fitting tube 59 approaches the hollow anchor bolt and fits with it to be able to grout into the hollow anchor bolt. On the contrary, when the clamping block 55 opens, the fitting tube 59 moves away from the hollow anchor bolt, and the moving position of the clamping block 55 enables the hollow anchor bolt to be first clamped and then fit with the fitting tube 59 to ensure the stability of the grouting anchor bolt during fitting.

[0028] In this embodiment, a first set of engaging teeth 582 are circumferentially distributed and fixed on the end face of the sleeve 58 close to the gear 56. A second set of engaging teeth 561 are also circumferentially embedded in the end face of the gear 56 close to the sleeve 58. When the sleeve 58 moves to the position where the clamping block 55 clamps the hollow anchor bolt and the fitting tube 59 is in close contact with the hollow anchor bolt, the first set of engaging teeth 582 move to the position where they are misaligned with the second set of engaging teeth 561, so that when the gear 56 rotates, it drives the sleeve 58 and the rotary drum 51 as a whole to rotate, so as to drive the hollow anchor bolt to rotate.

[0029] In this embodiment, the bottom of the second set of engaging teeth 561 is telescopically embedded in the gear 56 through a spring. An electromagnet 562 fixed in the housing is provided on the side of the gear 56 away from the second set of engaging teeth 561. The second set of engaging teeth 561 are made of a magnetically conductive material, and when the electromagnet 562 is energized, it can generate a magnetic force that adsorbs the second set of engaging teeth 561 and retracts them into the gear 56.

[0030] In this embodiment, the surface of the moving block 54 that is in contact with the clamping block 55 is an inclined surface that slopes downward toward the rotary arm 53. An adjusting screw 551 that is threadedly connected to the clamping block 55 penetrates through the clamping block 55, and the end of the adjusting screw 551 is in contact with the moving block 54. By rotating the adjusting screw 551, the depth of its penetration through the clamping block 55 can be changed, so as to change the distance between the moving block 54 and the clamping block 55, thereby changing the position of the contact surface between the moving block 54 and the clamping block 55, and further changing the height difference between the moving block 54 and the clamping block 55, so as to finely adjust the inner diameter of the ring formed when the clamping block 55 is in the clamped state to adapt to the diameter tolerance of the hollow anchor bolt.

[0031] During specific implementation, the guiding motor 11 drives the guiding shaft 7 to change the angle of the connecting rod 6, so that the two grouting drill rig assemblies 5 move to positions close to each other. The vehicle body 1 moves to the position on the side wall of the coal mine roadway to drive the grouting anchor rods. The height is adjusted by the lifting frame 2. Hollow anchor rods are inserted into the two grouting drill rig assemblies 5 respectively. The rotating cylinder motor 12 first performs pre-rotation to drive the threaded pipe 52 to rotate, so that the clamping block 55 clamps the hollow anchor rod. At the same time, the fitting pipe 59 fits to the end of the hollow anchor rod. After the first engaging tooth 582 fits with the gear 56, the electromagnet 562 is energized, and the second engaging tooth 561 extends out of the end face of the gear 56. When the rotating cylinder motor 12 continues to rotate to drive the gear 56, it drives the sleeve 58 and the rotating cylinder 51 to rotate as a whole, so as to drive the hollow anchor rod to rotate. The guiding motor 11 drives the two grouting drill rig assemblies 5 to move away from each other and move to both sides, so that the two hollow anchor rods are simultaneously drilled into the anchor holes. Grout is injected into the hollow anchor rods through the grouting pipe 13, so that the hollow anchor rods inject grout into the anchor holes.

[0032] The above are only the preferred specific implementation manners of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A drilling rig device for grouting bolts in coal mine roadways, comprising a vehicle body (1), characterized in that, a lifting frame (2) is fixed on the vehicle body (1), a sliding table (3) is fixed in the lifting platform of the lifting frame (2), slide rails (4) perpendicular to the traveling direction of the vehicle body (1) are slidably arranged on both sides of the sliding table (3), and grouting drilling table assemblies (5) are slidably arranged in the two slide rails (4) respectively, and the grouting drilling table assemblies (5) are connected to an external grouting pump through grouting pipes (13); the grouting drilling table assembly (5) includes a housing, the housing is slidably connected to the slide rail (4), a rotating cylinder (51) is rotatably arranged therein, a plurality of moving blocks (54) capable of moving radially along the rotating cylinder (51) are circumferentially distributed at one end of the rotating cylinder (51) far from the sliding table (3), a clamping block (55) slidably connected to the rotating cylinder (51) is arranged under each moving block (54), a threaded pipe (52) is rotatably arranged at one end of the rotating cylinder (51) far from the clamping block (55), reverse threads are provided on the inner and outer walls of the threaded pipe (52), a gear (56) is fixed at one end of the threaded pipe (52) outside the rotating cylinder (51), and the gear (56) can be driven by a rotating cylinder motor (12) fixed outside the housing; a plurality of rotatable rotating arms (53) are circumferentially distributed in the rotating cylinder (51), one end of the rotating arm (53) presses on the moving block (54), and the other end fits in a sleeve (58), a bevel groove (581) is opened at the joint of the sleeve (58) and the rotating arm (53), the bevel groove (581) slopes downward from the direction far from the clamping block (55), the sleeve (58) is axially slidable and rotationally restrictedly connected to the rotating cylinder (51), and internal threads threadedly connected to the threaded pipe (52) are provided on the inner wall of the sleeve (58); a fitting pipe (59) axially slidable and rotationally restrictedly connected to the rotating cylinder (51) is arranged at the center of the rotating cylinder (51), one end of the fitting pipe (59) close to the gear (56) penetrates to the other side of the gear (56) and is connected to the grouting pipe (13) through a pipe bearing (57), the pipe bearing (57) is slidably and rotationally restrictedly connected to the housing, one end of the fitting pipe (59) close to the clamping block (55) has a chamfer for outward expansion, and external threads threadedly connected to the threaded pipe (52) are provided on the outer wall of the fitting pipe (59); when the gear (56) and the threaded pipe (52) rotate, the sleeve (58) can be driven to axially slide, so as to change the fitting point of the bevel groove (581) and the rotating arm (53), make the rotating arm (53) rotate, and further make the moving block (54) and the clamping block (55) move radially along the rotating cylinder (51) to open or close, so as to clamp or release the hollow bolt between the clamping blocks (55).

2. The drilling rig device for grouting bolts in coal mine roadways according to claim 1, characterized in that, The two grouting drill rig assemblies (5) are connected together by four equal-length link rods (6) that are hinged to form a rhombus. Each of the two hinge points of the link rods (6) located on the center line of the traveling direction of the vehicle body (1) is hinged through a nut hinge plate (8).

3. A drilling rig device for a grouting bolt in a coal mine roadway according to claim 2, characterized in that, nuts are fixed on the two nut hinge plates (8), and they are jointly penetrated by a guide shaft (7). Threads that are threadedly connected to the nut hinge plates (8) are provided on two sections of the guide shaft (7) corresponding to the positions of the two nut hinge plates (8), and the helix directions of the two threads are opposite.

4. A drilling rig device for a grouting bolt in a coal mine roadway according to claim 3, characterized in that, a vertical guide rail (9) is fixed in the vehicle body (1), a connecting seat (10) is slidably provided in the vertical guide rail (9), the connecting seat (10) is rotatably connected to the guide shaft (7), and the guide shaft (7) penetrates to the other end of the connecting seat (10). A guide motor (11) capable of driving the guide shaft (7) to rotate is fixed in the connecting seat (10).

5. A drilling rig device for a grouting bolt in a coal mine roadway according to claim 1, characterized in that, engagement teeth one (582) are fixedly distributed in a circumferential manner on the end face of the sleeve (58) near the gear (56). Engagement teeth two (561) are also embedded in a circumferential manner on the end face of the gear (56) near the sleeve (58).

6. A drilling rig device for a grouting bolt in a coal mine roadway according to claim 5, characterized in that, the bottom of the engagement teeth two (561) is telescopically embedded in the gear (56) through a spring, and an electromagnet (562) fixed in the housing is provided on the side of the gear (56) away from the engagement teeth two (561).

7. A drilling rig device for a grouting bolt in a coal mine roadway according to claim 1, characterized in that, the surface of the moving block (54) that fits with the clamping block (55) is an inclined surface that slopes downward in the direction of approaching the swing arm (53). An adjusting screw (551) that is threadedly connected to the clamping block (55) penetrates through the clamping block (55), and the end of the adjusting screw (551) fits with the moving block (54).

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