A drilling device for earthwork blasting

Abstract

The application discloses a drilling device for earthwork and rockwork blasting, and belongs to the technical field of earthwork and rockwork blasting. The drilling device comprises a driving assembly, a pressing-down assembly and a sealing assembly. The driving assembly is connected with a hollow drill rod through a bearing assembly, and the drill rod rotates under the driving of the driving assembly. The pressing-down assembly is rotatably connected with the drill rod through a third bearing. The pressing-down assembly is provided with a clamping head. The clamping head and the drill rod are matched with each other to realize the drilling or rotation of the drill rod. The sealing assembly is provided with a water inlet device. The sealing assembly seals the blasting hole. Water is injected into the blasting hole through the water inlet device to form mud slurry. The mud slurry is discharged from the top end of the drill rod. A rotating feeding cylinder is arranged above the drill rod and is used for connecting an extension rod on the top of the drill rod. The device can lengthen the drill rod and is beneficial to the discharge of the soil from the drilling hole, and the convenience and practicality of the drilling device are improved.

Description

Technical Field

[0001] This invention belongs to the field of earthwork blasting technology and relates to a drilling device for earthwork blasting. Background Technology

[0002] For a long time, drill-and-blast method remained the primary method for coal mine roadway excavation. Medium-deep hole blasting was the main method used in this process, and the key to medium-deep hole blasting was the selection of the cut-out method. Research indicates that the best cut-out method for medium-deep hole blasting is straight-hole cut-out. Straight-hole cut-out requires leaving dense, unloaded holes to increase the free face for blasting.

[0003] However, since the blasting holes required for medium-deep hole blasting are between 5 and 15 meters deep, with a maximum depth of no more than 20 meters, the location of each blasting hole is usually determined first using measuring tools during blasting. Then, the blasting holes are manually drilled one by one on the surrounding rock using drilling rigs or chiseling equipment. Due to the large number and depth of the blasting holes on the blasting surface, drilling is difficult. Furthermore, existing drilling machines are not convenient for removing powdery materials from the boreholes, which can easily cause blockages and increase the difficulty of drilling. In addition, it is inconvenient to accurately drill the required depth of the boreholes. Summary of the Invention

[0004] This invention overcomes the shortcomings of the prior art and proposes a drilling device for earthwork blasting.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution.

[0006] A drilling device for earth and rock blasting includes a drive assembly, a pressing assembly, and a sealing assembly. The drive assembly is connected to a hollow drill rod via a bearing assembly, and the drill rod rotates under the drive of the drive assembly. The pressing assembly is rotatably connected to the drill rod via a third bearing. The pressing assembly is equipped with a clamping head, which cooperates with the drill rod. The pressing assembly is connected to a hydraulic lifting pump, and the hydraulic lifting pump drives the clamping head of the pressing assembly to clamp the drill rod to achieve drilling or unscrewing of the drill rod.

[0007] The sealing assembly is circumferentially connected to the outer wall of the drill rod via a first bearing. A sealing plate is provided on the outer wall of the first bearing, and a sealing insert is fixedly connected to the bottom wall of the sealing plate. A water inlet device is provided between the sealing plate and the inner wall of the sealing insert. The drill bit connected to the bottom of the drill rod is provided with a flow guide cavity. An inlet and outlet hole is provided on the inner wall of the flow guide cavity, which is connected to the drill rod. The sealing plate is fixed to the ground, and the sealing insert is inserted into the blast hole for sealing. Water is injected into the blast hole through the water inlet device. The water flow mixes the soil drilled by the drill bit to form mud. The mud then enters the flow guide cavity through the inlet and outlet hole on the drill bit, and then is discharged along the top of the drill rod.

[0008] A rotating feeding cylinder is provided above the drill rod. The rotating feeding cylinder is used to place a hollow extension rod. The extension rod is provided with a connection hole for screwing onto the drill rod. The rotating feeding cylinder is connected to a rotary drive device. The rotary drive device drives the rotating feeding cylinder to rotate from a horizontal state to a vertical state, so that the rotating feeding cylinder drives the extension rod to connect with the drill rod.

[0009] Furthermore, it includes a base, with wheels connected to the bottom of the base and a back plate connected to the base. The back plate is provided with a fixing frame and a mounting frame. The fixing frame is connected to the drive assembly, and the mounting frame is connected to the rotary drive device. The hydraulic lifting pump is mounted on the base.

[0010] Furthermore, the drive assembly includes a motor and a first rotating cylinder. A second bearing is connected inside the fixed frame, and the first rotating cylinder is connected inside the second bearing. The first rotating cylinder is provided with a first pulley, and a second pulley is fixedly connected to the output shaft of the motor. A transmission belt is connected between the first pulley and the second pulley. A second limiting groove is provided on the inner wall of the first rotating cylinder, and a limiting block is fixedly connected to the outer wall of the drill rod. The second limiting groove and the limiting block are slidably connected.

[0011] Furthermore, a slot is provided at the top of the first rotating cylinder; a third connector is fixedly connected to one end of the rotating feeding cylinder, and a clamp is fixedly connected to the third connector, with the clamp and the slot cooperating with each other.

[0012] Furthermore, the rotary drive device includes a hydraulic telescopic pump, which is fixedly connected to a mounting frame. A fixed rod is fixedly connected inside the mounting frame, and a slider is slidably connected to the fixed rod. The output shaft of the hydraulic telescopic pump is fixedly connected to the slider. A third rotating cylinder is rotatably connected to the mounting frame. One end of a rotating support rod is rotatably connected to the slider, and the other end of the rotating support rod is rotatably connected to the third rotating cylinder. A rotating feeding cylinder is located inside the third rotating cylinder. In the vertical state, the axis of the rotating feeding cylinder coincides with the axis of the third rotating cylinder and the axis of the drill rod.

[0013] Furthermore, a permanent magnet is fixedly connected to the end of the rotating feeding cylinder away from the third connector, and an electromagnet is fixedly connected to the end of the third rotating cylinder close to the permanent magnet. The lifting and lowering control of the rotating feeding cylinder is achieved through the cooperation of the permanent magnet and the electromagnet.

[0014] Furthermore, a damper is fixedly connected to the inner wall of the rotating feeding cylinder, and the descent speed of the extension rod inside the rotating feeding cylinder is controlled by the setting of the damper.

[0015] Furthermore, the pressing assembly includes a second rotating cylinder connected within the third bearing. The inner wall of the second rotating cylinder is slidably connected to the drill rod via a limiting groove. A connecting frame is fixedly connected to the outer wall of the second rotating cylinder, and a rotating clamping plate is rotatably connected to the connecting frame. A clamping head is fixedly connected to one end of the rotating clamping plate. A fixing plate is fixedly connected to the outer wall of the second rotating cylinder, and a spring is connected between the other end of the fixing plate and the rotating clamping plate. The hydraulic lifting pump is connected to the third bearing via a connecting piece.

[0016] Furthermore, the connecting component includes a lifting frame; the lifting frame is fixedly connected to the output shaft of the hydraulic lifting pump, and a mounting base is fixedly connected inside the lifting frame, with a third bearing connected inside the mounting base.

[0017] Furthermore, the water device includes a guide pipe fixedly connected to the sealing plate. The sealing plate has a water inlet hole connected to the guide pipe. A second connector is provided on one side of the guide pipe. A fixing block is fixedly connected to the sealing plate, and a fixing cylinder is fixedly connected to the fixing block. A ground-gripping nail is provided inside the fixing cylinder. The sealing plate is fixed to the ground by the ground-gripping nail, and the sealing cylinder is inserted into the rupture hole. The second connector is used to connect to the high-pressure water supply equipment, thereby pumping high-pressure water into the guide pipe. The high-pressure water then flows into the rupture hole along the water inlet hole.

[0018] The beneficial effects of this invention compared to the prior art are as follows:

[0019] This invention utilizes a rotating feed cylinder during drilling to achieve rapid connection between the extension rod and the drill rod. The entire process requires no machine downtime or multiple personnel, simplifying the installation process and accelerating drilling efficiency. Furthermore, during drilling, high-pressure water is injected into the blast hole, mixing the drilled soil and rock into mud. This mud is then discharged into the guide chamber through the inlet and outlet holes on the drill bit and subsequently discharged along the drill rod, thus preventing borehole blockage. Additionally, this invention allows for further control of the drilling depth by adjusting the length of the extension rod, enhancing the convenience and practicality of the drilling device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the drilling device for earth and rock blasting described in this invention.

[0021] Figure 2 This is a schematic diagram of the internal structure of the drill bit in the drilling device for earth and rock blasting described in this invention.

[0022] Figure 3 This is a schematic diagram of the rotating feeding cylinder in the drilling device for earth and rock blasting described in this invention.

[0023] Figure 4This is a schematic diagram of the internal structure of the drive component in the drilling device for earth and rock blasting described in this invention.

[0024] Figure 5 This is a schematic diagram of the internal structure of the pressing component in the drilling device for earth and rock blasting described in this invention.

[0025] Figure 6 This is a schematic diagram of the drill bit structure in the drilling device for earth and rock blasting described in this invention.

[0026] Figure 7 This is a schematic diagram of the extension rod in the drilling device for earth and rock blasting described in this invention.

[0027] Figure 8 This is a schematic diagram of the rotating feeding cylinder in the drilling device for earth and rock blasting described in this invention.

[0028] Figure 9 This is a schematic diagram of the structure of the first rotating cylinder in the drilling device for earth and rock blasting described in this invention.

[0029] Figure 10 This is a schematic diagram of the downward pressing component in the drilling device for earth and rock blasting described in this invention.

[0030] Figure 11 This is a schematic diagram of the sealing component in the drilling device for earth and rock blasting described in this invention.

[0031] Figure 12 This is a cross-sectional view of the sealing component in the drilling device for earth and rock blasting described in this invention.

[0032] In the diagram: 1-Base, 2-Wheel, 3-Drill rod, 4-Mounting head, 5-Connecting rod, 6-First connector, 7-Drill bit, 8-Guide cavity, 9-Inlet / outlet hole, 10-Limiting block, 11-Sealing plate, 12-First bearing, 13-Sealing insert, 14-Guide pipe, 15-Water inlet, 16-Second connector, 17-Fixing block, 18-Fixing cylinder, 19-Grip nail, 20-Fixing frame, 21-Second bearing, 22-First rotating cylinder, 23-First pulley, 24-Fixing seat, 25-Motor, 26-Second pulley, 27-Transmission belt, 28-Second limiting groove, 29-Hydraulic lifting pump, 30-Lifting frame 31-Mounting base, 32-Third bearing, 33-Second rotating cylinder, 34-Third limiting groove, 35-Connecting frame, 36-Rotating clamping plate, 37-Fixing plate, 38-Spring, 39-Card slot, 40-Mounting frame, 41-Fixing rod, 42-Slider, 43-Third rotating cylinder, 44-Rotating support rod, 45-Hydraulic telescopic pump, 46-Rotating feeding cylinder, 47-Third connector, 48-Card head, 49-Permanent magnet, 50-Electromagnet, 51-Extension rod, 52-Fourth connector, 53-Connecting hole, 54-Damper, 55-Sealing assembly, 56-Drive assembly, 57-Pressing assembly, 58-Clamping head. Detailed Implementation

[0033] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0034] See Figures 1-12 This invention provides a drilling device for earthwork blasting, comprising a base 1, a wheel 2 connected to the bottom of the base 1, a hollow drill rod 3 mounted on the base 1, a limit block 10 fixedly connected to the outer wall of the drill rod 3, an installation head 4 fixedly connected to the bottom of the drill rod 3, a first connector 6 internally threaded to the installation head 4, a drill bit 7 fixedly connected to the first connector 6 via a connecting rod 5, a flow guide cavity 8 provided inside the drill bit 7, and an inlet / outlet hole 9 provided on the inner wall of the flow guide cavity 8.

[0035] A hydraulic lifting pump 29 is fixedly connected to the base 1. A lifting frame 30 is fixedly connected to the output shaft of the hydraulic lifting pump 29. A mounting base 31 is fixedly connected inside the lifting frame 30. A third bearing 32 is connected inside the mounting base 31. A pressing component 57 for driving the drill rod 3 to press down is connected inside the third bearing 32. A back plate is fixedly connected to the base 1. A fixing frame 20 is fixedly connected to the back plate. A second bearing 21 is connected inside the fixing frame 20. A first rotating cylinder 22 is connected inside the second bearing 21. A second limiting groove 28 is provided on the inner wall of the first rotating cylinder 22. The second limiting groove 28 is slidably connected to the limiting block 10. A driving component 56 for driving the first rotating cylinder 22 to rotate is connected to one end of the first rotating cylinder 22. A slot 39 is provided at the other end of the first rotating cylinder 22. A mounting frame 40 is fixedly connected to the top of the back plate. A fixed rod 41 is fixedly connected inside the mounting frame 40, and a slider 42 is slidably connected to the fixed rod 41. A hydraulic telescopic pump 45 is fixedly connected to the mounting frame 40, and the output shaft of the hydraulic telescopic pump 45 is fixedly connected to the slider 42. A third rotating cylinder 43 is rotatably connected to the mounting frame 40. One end of a rotating support rod 44 is rotatably connected to the slider 42, and the other end of the rotating support rod 44 is rotatably connected to the third rotating cylinder 43. A rotating feeding cylinder 46 is provided inside the third rotating cylinder 43. In the vertical state, the axis of the rotating feeding cylinder 46 and the third rotating cylinder 43 coincides with the axis of the drill rod 3. A third connector 47 is fixedly connected to one end of the rotating feeding cylinder 46, and a clamp 48 is fixedly connected to the third connector 47. The clamp 48 cooperates with the clamp groove 39. A sealing component 55 for sealing the blast hole is provided on the outer wall of the drill rod 3.

[0036] The drilling device for earth and rock blasting also includes a hollow extension rod 51, one end of which is fixedly connected to a fourth connector 52, and the other end of which is provided with a connecting hole 53; the top of the drill rod 3 is also provided with a fourth connector 52. When the drilling depth exceeds the length of the drill rod 3, the extension rod 51 can be connected to the tail end of the drill rod 3 by threading the fourth connector 52 at the top of the drill rod 3 through the connecting hole 53 of the extension rod 51, thereby increasing the length of the drill rod 3. A permanent magnet 49 is fixedly connected to the other end of the rotating feeding cylinder 46. An electromagnet 50 is fixedly connected to the end of the third rotating cylinder 43 near the permanent magnet 49. The present invention controls the permanent magnet 49 by the mutual cooperation of the electromagnet 50 and the permanent magnet 49 and the characteristic that like magnetic poles repel and unlike magnetic poles attract. In turn, the permanent magnet 49 controls the lifting and lowering of the rotating feeding cylinder 46. A damper 54 is fixedly connected to the inner wall of the rotating feeding cylinder 46. The present invention controls the descent speed of the extension rod 51 inside the rotating feeding cylinder 46 by setting the damper 54.

[0037] The present invention first inserts the drill rod 3 into the drive assembly 56 and the pressing assembly 57, then fits the sealing assembly 55 onto the drill rod 3, and then installs the drill bit 7 onto the drill rod 3, thereby completing the assembly of the drill bit 7. After that, the present invention drives the first rotating cylinder 22 to rotate through the drive assembly 56. The first rotating cylinder 22 drives the drill rod 3 to rotate through the sliding connection between the second limiting groove 28 and the limiting block 10. The drill rod 3 drives the drill bit 7 to rotate. At the same time, the hydraulic lifting pump 29 drives the lifting frame 30 to rise and fall. The lifting frame 30 drives the pressing assembly 57 to rise and fall through the mounting base 31. The pressing assembly 57 drives the drill rod 3 to press down, and the drill rod 3 drives the drill bit 7 to press down, thereby drilling a hole in the soil and rock.

[0038] Simultaneously, the sealing component 55 is installed into the blast hole to seal it. High-pressure water is injected into the blast hole through the sealing component 55, mixing the drilled soil and rock into mud. The mud is then discharged into the guide chamber 8 through the inlet / outlet hole 9 on the drill bit 7, and then discharged along the drill rod 3. When the drilling depth exceeds the length of the drill rod 3, the extension rod 51 is inserted into the rotating feed cylinder 46. One end of the extension rod 51 with the connecting hole 53 is inserted into the rotating feed cylinder 46, with the connecting hole 53 slightly protruding. Then, the hydraulic telescopic pump 45 drives the slider 42 to move, which in turn drives the rotating support rod 44 to rotate and rise. The rotating support rod 44 then drives the third rotating cylinder 43 to rotate and rise, thereby rotating the rotating feed cylinder 46 from horizontal to vertical. At this point, the rotating feed cylinder 46 is positioned between the electromagnet 50 and the permanent magnet 49. The repulsive force between the two does not cause the cylinder to descend. Then, by adjusting the magnetic force of the electromagnet 50, the repulsive force between the electromagnet 50 and the permanent magnet 49 is adjusted, thereby driving the rotating feeding cylinder 46 to descend slowly. This causes the connecting hole 53 of the extension rod 51 to move closer to the fourth connecting head 52 at the tail end of the drill rod 3. Then, because the drill rod 3 rotates actively under the drive of the drive assembly 56, while the extension rod 51 rotates passively under the drive of the drill rod 3, there is a torque between the two. Thus, the fourth connecting head 52 and the connecting hole 53 are rotated and threadedly connected under the action of the torque. After the rotational connection is completed, the electromagnet 50 is de-energized. At this time, the rotating feeding cylinder 46 drives the third connecting head 47 and the clamp 48 to press down. The clamp 48 is inserted into the clamp slot 39, thereby realizing the connection between the second rotating cylinder 33 and the rotating feeding cylinder 46. At this time, the connection and fixation between the extension rod 51 and the drill rod 3 are completed. When the extension rod 51 is installed again, the electromagnet 50 is energized. At this time, the feeding cylinder 46 is rotated and lifted under the repulsive force between the electromagnet 50 and the permanent magnet 49, thereby pulling the clip 48 out of the slot 39 and resetting it, so that the extension rod 51 can be installed again.

[0039] In one instance of this embodiment, please refer to Figures 1-12The sealing assembly 55 includes a first bearing 12 slidably connected to the outer wall of the drill rod 3. A sealing plate 11 is installed on the outer wall of the first bearing 12. A sealing insert 13 is fixedly connected to the bottom wall of the sealing plate 11. A guide pipe 14 is fixedly connected to the sealing plate 11. A water inlet 15 is provided inside the sealing plate 11 and is connected to the guide pipe 14. A second connector 16 is provided on one side of the guide pipe 14. A fixing block 17 is fixedly connected to the sealing plate 11. A fixing cylinder 18 is fixedly connected to the fixing block 17. A ground-gripping nail is provided inside the fixing cylinder 18. 19. The sealing assembly 55 uses the ground anchor 19 to fix the sealing plate 11 to the ground and inserts the sealing insert 13 into the blast hole to seal the gap between the blast hole and the drill rod 3. At the same time, the high-pressure water supply equipment is connected through the second connector 16 to pump high-pressure water into the guide pipe 14. The high-pressure water is then injected into the blast hole through the water inlet 15. The water flow mixes the soil drilled by the drill bit 7 to form mud. The mud then enters the guide cavity 8 through the inlet and outlet holes 9 on the drill bit 7 and is discharged along the top of the drill rod 3.

[0040] In one instance of this embodiment, please refer to Figures 1-12 The drive assembly 56 includes a first pulley 23 fixedly connected to the first rotating cylinder 22, a fixed base 24 fixedly connected to the back plate, a motor 25 fixedly connected to the fixed base 24, a second pulley 26 fixedly connected to the output shaft of the motor 25, and a transmission belt 27 connecting the first pulley 23 and the second pulley 26. The motor 25 drives the second pulley 26 to rotate, and the second pulley 26 drives the first pulley 23 to rotate through the transmission belt 27. The first pulley 23 drives the first rotating cylinder 22 to rotate.

[0041] In one instance of this embodiment, please refer to Figures 1-12The pressing assembly 57 includes a second rotating cylinder 33 connected within a third bearing 32. A third limiting groove 34 is provided on the inner wall of the second rotating cylinder 33, and the third limiting groove 34 is slidably connected to the limiting block 10. A connecting frame 35 is fixedly connected to the outer wall of the second rotating cylinder 33, and a rotating clamping plate 36 is rotatably connected to the connecting frame 35. A clamping head 58 is fixedly connected to one end of the rotating clamping plate 36, and the clamping head 58 cooperates with the drill rod 3. A fixing plate 37 is fixedly connected to the outer wall of the second rotating cylinder 33, and a spring 38 is connected between the fixing plate 37 and the other end of the rotating clamping plate 36. The second rotating cylinder 33 is rotatably connected and fixed by the third bearing 32. When the drill rod 3 rotates, the drill rod 3 drives the second rotating cylinder 33 to rotate synchronously through the sliding connection between the third limiting groove 34 and the limiting block 10. The second rotating cylinder 33 drives the rotating clamping plate 36 to rotate synchronously through the connecting frame 35. When the hydraulic lifting pump 29 drives the second rotating cylinder 33 to rise, the second rotating cylinder 33 drives the rotating clamping plate 36 to rise. At this time, the clamping head 58 is slidably connected to the outer wall of the drill rod 3, and the friction between the clamping head 58 and the drill rod 3 pushes the clamping head to the distance. The drill rod 3 rotates away from the direction of the drill rod 3. Then, when the hydraulic lifting pump 29 drives the second rotating cylinder 33 to press down, the second rotating cylinder 33 drives the rotating clamping plate 36 to press down. At this time, the clamping head 58 is slidably connected to the outer wall of the drill rod 3, and the friction between the clamping head 58 and the drill rod 3 pushes the clamping head 58 to rotate closer to the drill rod 3. The greater the pressure, the greater the friction between the clamping head 58 and the drill rod 3, until the drill rod 3 is clamped and fixed by the clamping head 58. Then, the clamping head 58 drives the drill rod 3 to press down, and the drill rod 3 drives the drill bit 7 to press down and drill.

[0042] The working principle of this invention is as follows: First, the drill rod 3 is inserted into the first rotating cylinder 22 and the second rotating cylinder 33. Then, the sealing plate 11 is fitted onto the drill rod 3, and the drill bit 7 is installed on the drill rod 3, thereby completing the assembly of the drill bit 7. Afterward, the invention drives the second pulley 26 to rotate through the motor 25. The second pulley 26 drives the first pulley 23 to rotate through the transmission belt 27. The first pulley 23 drives the first rotating cylinder 22 to rotate. The first rotating cylinder 22 drives the drill rod 3 to rotate through the sliding connection between the second limiting groove 28 and the limiting block 10. The drill rod 3 drives the drill bit 7 to rotate.

[0043] The second rotating cylinder 33 is rotatably connected and fixed by the third bearing 32. When the drill rod 3 rotates, the drill rod 3 drives the second rotating cylinder 33 to rotate synchronously through the sliding connection between the third limiting groove 34 and the limiting block 10. The second rotating cylinder 33 drives the rotating clamping plate 36 to rotate synchronously through the connecting frame 35. When the hydraulic lifting pump 29 drives the second rotating cylinder 33 to rise, the second rotating cylinder 33 drives the rotating clamping plate 36 to rise. At this time, the clamping head 58 is slidably connected to the outer wall of the drill rod 3, and the friction between the clamping head 58 and the drill rod 3 pushes the clamping head 58 away from the drill rod 3. Then, when the hydraulic lifting pump 29 drives the second rotating cylinder 33 to press down, the second rotating cylinder 33 drives the rotating clamping plate 36 to press down. At this time, the clamping head 58 is slidably connected to the outer wall of the drill rod 3, and the friction between the clamping head 58 and the drill rod 3 pushes the clamping head 58 away from the drill rod 3. The clamping head 58 is pushed towards the drill rod 3. The greater the pressure, the greater the friction between the clamping head 58 and the drill rod 3, until the drill rod 3 is clamped and fixed by the clamping head 58. Then, the clamping head 58 drives the drill rod 3 to press down, and the drill rod 3 drives the drill bit 7 to press down and drill a hole. The drill rod 3 drives the drill bit 7 to press down, thereby drilling a hole in the soil and rock. At the same time, the sealing plate 11 is installed and fixed on the ground, and the sealing insert 13 is inserted into the blast hole to seal the gap between the blast hole and the drill rod 3. The second connector 16 is connected to the high-pressure water supply equipment, so that high-pressure water is pumped into the guide pipe 14. The high-pressure water is then injected into the blast hole through the water inlet hole 15, thereby mixing the soil drilled by the drill bit 7 with the water flow to form mud. The mud then enters the guide cavity 8 through the inlet and outlet holes 9 on the drill bit 7, and is discharged along the top of the drill rod 3.

[0044] When the drilling depth exceeds the length of drill rod 3, insert extension rod 51 into rotating feed cylinder 46, insert one end of connection hole 53 of extension rod 51 into rotating feed cylinder 46, and slightly extend connection hole 53 out of rotating feed cylinder 46. Then, drive slider 42 to move via hydraulic telescopic pump 45. Slider 42 drives rotating support rod 44 to rotate and rise. Rotating support rod 44 drives third rotating cylinder 43 to rotate and rise, thereby driving rotating feed cylinder 46 from horizontal to vertical. At this time, rotating feed cylinder 46 does not descend under the repulsive force between electromagnet 50 and permanent magnet 49. Then, adjust the magnetic force of electromagnet 50 to adjust the repulsive force between electromagnet 50 and permanent magnet 49, thereby driving rotating feed cylinder 46 to descend slowly, so that connection hole 53 of extension rod 51 leads to fourth connector at the tail end of drill rod 3. 52 approaches, and then the drill rod 3 rotates actively, while the extension rod 51 rotates passively under the drive of the drill rod 3. There is a torque between the two, so the fourth connector 52 and the connecting hole 53 are rotated and threadedly connected under the action of the torque. After the rotation connection is completed, the electromagnet 50 is de-energized. At this time, the feeding cylinder 46 is rotated to drive the third connector 47 and the chuck 48 to press down. The chuck 48 is inserted into the slot 39, thereby realizing the connection between the second rotating cylinder 33 and the rotating feeding cylinder 46. At this time, the connection and fixation between the extension rod 51 and the drill rod 3 are completed. Afterwards, when the extension rod 51 is installed again, the electromagnet 50 is energized. At this time, the rotating feeding cylinder 46 is lifted under the action of the repulsive force between the electromagnet 50 and the permanent magnet 49, thereby pulling the chuck out of the slot 39 and resetting it, so that the extension rod 51 can be installed again.

[0045] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. It should not be considered that the specific embodiments of the present invention are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the present invention, and all of these should be considered to fall within the scope of patent protection determined by the submitted claims.

Claims

1. A drilling device for earth and rock blasting, characterized in that, It includes a drive assembly (56), a pressing assembly (57), and a sealing assembly (55); the drive assembly (56) is connected to the hollow drill rod (3) through a bearing assembly, and the drill rod (3) rotates under the drive of the drive assembly (56); the pressing assembly (57) is rotatably connected to the drill rod (3) through a third bearing (32), the pressing assembly (57) is provided with a clamping head (58), the clamping head (58) cooperates with the drill rod (3), the pressing assembly (57) is connected to a hydraulic lifting pump (29), and the hydraulic lifting pump (29) drives the clamping head (58) of the pressing assembly (57) to clamp the drill rod (3) to realize the drilling or unscrewing of the drill rod (3); The sealing assembly (55) is connected to the outer wall of the drill rod (3) through the first bearing (12). The outer wall of the first bearing (12) is provided with a sealing plate (11). The bottom wall of the sealing plate (11) is fixedly connected with a sealing insert (13). A water inlet device is provided between the inner wall of the sealing plate (11) and the sealing insert (13). The drill bit (7) connected to the bottom of the drill rod (3) is provided with a guide cavity (8). The inner wall of the guide cavity (8) is provided with an inlet and outlet hole (9). The guide cavity (8) is connected to the drill rod (3). The sealing plate (11) is fixed on the ground, and the sealing insert (13) is inserted into the blast hole for sealing. Water is injected into the blast hole through the water inlet device. The water flow mixes the soil drilled by the drill bit (7) to form mud. The mud then enters the guide cavity (8) through the inlet and outlet hole (9) on the drill bit (7) and is discharged along the top of the drill rod (3). A rotating feeding cylinder (46) is provided above the drill rod (3). The rotating feeding cylinder (46) is used to place a hollow extension rod (51). The extension rod (51) is provided with a connection hole for screwing with the drill rod (3). The rotating feeding cylinder (46) is connected to a rotating drive device. The rotating drive device drives the rotating feeding cylinder (46) to rotate from horizontal to vertical, so that the rotating feeding cylinder (46) drives the extension rod (51) to connect with the drill rod (3).

2. The drilling device for earthwork blasting according to claim 1, characterized in that, Includes a base (1), with wheels (2) connected to the bottom of the base (1) and a back plate connected to the base (1). The back plate is provided with a fixing frame (20) and a mounting frame (40). The fixing frame (20) is connected to a drive assembly (56), and the mounting frame (40) is connected to a rotary drive device. The hydraulic lifting pump (29) is located on the base (1).

3. The drilling device for earthwork blasting according to claim 2, characterized in that, The drive assembly (56) includes a motor (25) and a first rotating cylinder (22). A second bearing (21) is connected inside the fixed frame (20). The first rotating cylinder (22) is connected inside the second bearing (21). The first rotating cylinder (22) is provided with a first pulley (23). A second pulley (26) is fixedly connected to the output shaft of the motor (25). A transmission belt (27) is connected between the first pulley (23) and the second pulley (26). A second limiting groove (28) is provided on the inner wall of the first rotating cylinder (22). A limiting block (10) is fixedly connected to the outer wall of the drill rod (3). The second limiting groove (28) and the limiting block (10) are slidably connected.

4. A drilling device for earth and rock blasting according to claim 3, characterized in that, The top end of the first rotating cylinder (22) is provided with a slot (39); one end of the rotating feeding cylinder (46) is fixedly connected to a third connector (47), and a clip (48) is fixedly connected to the third connector (47), with the clip (48) and the slot (39) cooperating with each other.

5. A drilling device for earth and rock blasting according to claim 4, characterized in that, The rotary drive device includes a hydraulic telescopic pump (45), which is fixedly connected to the mounting frame (40). A fixed rod (41) is fixedly connected inside the mounting frame (40). A slider (42) is slidably connected to the fixed rod (41). The output shaft of the hydraulic telescopic pump (45) is fixedly connected to the slider (42). A third rotating cylinder (43) is rotatably connected to the mounting frame (40). One end of a rotating support rod (44) is rotatably connected to the slider (42). The other end of the rotating support rod (44) is rotatably connected to the third rotating cylinder (43). A rotating feeding cylinder (46) is located inside the third rotating cylinder (43). In the vertical state, the axis of the rotating feeding cylinder (46) coincides with the axis of the third rotating cylinder (43) and the axis of the drill rod (3).

6. A drilling device for earth and rock blasting according to claim 5, characterized in that, A permanent magnet (49) is fixedly connected to the end of the rotating feeding cylinder (46) away from the third connector (47), and an electromagnet (50) is fixedly connected to the end of the third rotating cylinder (43) close to the permanent magnet (49). The lifting and lowering control of the rotating feeding cylinder (46) is achieved through the cooperation of the permanent magnet (49) and the electromagnet (50).

7. A drilling device for earth and rock blasting according to any one of claims 4-6, characterized in that, A damper (54) is fixedly connected to the inner wall of the rotating feeding cylinder (46). The descent speed of the extension rod (51) inside the rotating feeding cylinder (46) is controlled by the damper (54).

8. A drilling device for earth and rock blasting according to claim 1, characterized in that, The pressing assembly (57) includes a second rotating cylinder (33) connected in the third bearing (32). The inner wall of the second rotating cylinder (33) is slidably connected to the drill rod (3) through a limiting groove (34). A connecting frame (35) is fixedly connected to the outer wall of the second rotating cylinder (33). A rotating clamping plate (36) is rotatably connected to the connecting frame (35). A clamping head (58) is fixedly connected to one end of the rotating clamping plate (36). A fixing plate (37) is fixedly connected to the outer wall of the second rotating cylinder (33). A spring (38) is connected between the fixing plate (37) and the other end of the rotating clamping plate (36). The hydraulic lifting pump (29) is connected to the third bearing (32) through a connecting piece.

9. A drilling device for earth and rock blasting according to claim 8, characterized in that, The connecting component includes a lifting frame (30); the lifting frame (30) is fixedly connected to the output shaft of the hydraulic lifting pump (29), and a mounting seat (31) is fixedly connected inside the lifting frame (30), and a third bearing (32) is connected inside the mounting seat (31).

10. A drilling device for earth and rock blasting according to claim 1, characterized in that, The water inlet device includes a guide pipe (14), which is fixedly connected to the sealing plate (11). The sealing plate (11) is provided with a water inlet hole (15), which is connected to the guide pipe (14). A second connector (16) is provided on one side of the guide pipe (14). A fixing block (17) is fixedly connected to the sealing plate (11), and a fixing cylinder (18) is fixedly connected to the fixing block (17). A ground-gripping nail (19) is provided inside the fixing cylinder (18). The sealing plate (11) is fixedly installed on the ground by the ground-gripping nail (19), and the sealing insert (13) is inserted into the rupture hole. The device is connected to the high-pressure water supply equipment by the second connector (16), thereby pumping high-pressure water into the guide pipe (14). The high-pressure water is then injected into the rupture hole along the water inlet hole (15).

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