An improved fully hydraulic tunnel drilling rig

Abstract

This utility model relates to the field of tunnel drilling technology, and in particular to an improved fully hydraulic tunnel drilling rig, comprising a base, a turntable mounted on the base, a main frame mounted on the turntable, a bracket body hinged to the main frame, and a mast mounted on the bracket body and carrying a drilling unit. The main frame also houses a lifting mechanism that drives the bracket body to rotate upwards along the hinge to adjust the mast's pitch angle. The drilling unit includes a clamping unhooker mounted at the front of the mast and a crane mounted at the rear of the mast. This utility model directly anchors the tunnel wall to the ground anchor seat instead of the traditional top rod, completely eliminating the risk of overall machine displacement and borehole deviation caused by drilling vibration, while also reducing high-frequency noise generated by rigid collisions of the top rod. The slewing joint of the guide assembly can adaptively swing left and right according to the wire rope's inclination angle, eliminating the deformation effect of lateral forces on the support structure, significantly reducing abnormal wear of the wire rope, and eliminating the risk of equipment falling from height due to structural deformation.

Description

Technical Field

[0001] This utility model relates to the field of tunnel drilling technology, and in particular to an improved fully hydraulic tunnel drilling rig. Background Technology

[0002] Fully hydraulic tunnel drilling rigs are core equipment for deep-hole drilling in mine roadways and tunnels, and are widely used in disaster prevention, advanced geological forecasting, and gas extraction. Although underground drilling has advantages over surface drilling, such as avoiding goaf areas and reducing the amount of work, existing equipment still has significant shortcomings under challenging geological conditions.

[0003] The drilling rigs previously developed by the applicant (such as CN214787186U) have revealed the following technical bottlenecks through downhole testing:

[0004] 1. The drilling rig mast uses a top rod structure to support the tunnel roof. However, when drilling in high-hardness rock formations or fractured zones, the violent vibration transmitted by the drill rod can easily cause the top rod to slip off, leading to displacement of the entire machine or even borehole deviation and scrapping. At the same time, the rigid contact between the top rod and the roof will generate high-frequency impact noise, which will worsen the working environment.

[0005] 2. When the wire rope is guided by the overhead crane pulley for core sampling, the support part of the overhead crane (refer to CN218371362U) is too long and is easily deformed by lateral forces, which increases the probability of wear between the wire rope and the drill rod, posing a safety hazard of falling from a height and affecting personal safety.

[0006] 3. The hydraulic winch is located outside the main frame, which results in the machine occupying a large space and making transportation inconvenient. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide an improved fully hydraulic tunnel drilling rig that can effectively prevent the displacement of the whole machine, reduce the wear of the wire rope and avoid high-altitude fall accidents, in order to address the shortcomings of the existing technology.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] An improved fully hydraulic tunnel drilling rig, characterized by:

[0010] It includes a base, a turntable mounted on the base, a main frame mounted on the turntable, a bracket body hinged to the main frame, and a mast mounted on the bracket body and carrying a drilling unit. The main frame also has a lifting mechanism installed inside to drive the bracket body to flip upward along the hinge to adjust the pitch angle of the mast.

[0011] The drilling unit includes a clamping and unhooking device installed at the front of the mast, a crane installed at the rear of the mast, a moving rail installed on the mast between the clamping and unhooking device and the crane, and a power head slidably installed on the moving rail;

[0012] An anchoring assembly for enhanced drilling stability is installed at the front section of the mast, and a guiding assembly for enhanced coring stability is installed at the rear section of the mast.

[0013] The anchoring assembly includes a connecting seat I fixedly installed at the front end of the mast, a connecting shaft I transversely passing through the connecting seat I, and a ground anchor installed at the front of the connecting seat I and capable of swinging up and down around the connecting shaft I. The ground anchor is symmetrically provided with positioning holes for external anchor rods to pass through.

[0014] The guide assembly includes a connecting seat II fixedly installed at the bottom of the mast, a connecting shaft II longitudinally passing through the connecting seat II, a slewing joint installed at the bottom of the connecting seat II and swaying left and right around the connecting shaft II, two side plates fixedly installed on the slewing joint and arranged opposite each other, a wheel axle transversely passing through the two side plates, and a pulley rotatably installed on the wheel axle between the two side plates via a bearing. The outer circumferential surface of the pulley is provided with a positioning groove that cooperates with an external steel wire rope.

[0015] The technical problem to be solved by this utility model can be further achieved through the following steps: the ground anchor includes an outer frame and an inner support; the outer frame includes an installation plate connected to the connecting seat I; the upper and lower edges of the installation plate are respectively horizontally extended with support plates; the installation plate and the two support plates form a U-shaped structure with an opening facing forward; the inner support includes multiple reinforcing ribs staggered in the opening of the U-shaped structure; each reinforcing rib is fixedly connected to the installation plate; the positioning holes are symmetrically opened on the installation plate.

[0016] The technical problem to be solved by this utility model can be further achieved through the following steps: the end of the support plate away from the mast is provided with anti-slip teeth for abutting against the inner wall of the tunnel; a secondary support seat is fixedly installed on the bottom surface of the mast below the power head; and a pipe clamp that cooperates with the external secondary support is fixedly sleeved on one end of the secondary support seat.

[0017] The technical problem to be solved by this utility model can be further achieved through the following steps: a moving groove is provided on the top surface of the mast facing downwards, and positioning rods are horizontally inserted on the mast at both ends of the moving groove. A driving cylinder for driving the power head to slide and adjust back and forth on the moving rail is installed between the two positioning rods.

[0018] The technical problem to be solved by this utility model can be further achieved through the following steps: the opening of the movable trough is fixedly covered with a baffle plate to prevent mud liquid particles from directly washing the cylinder rod.

[0019] The technical problem to be solved by this utility model can be further achieved through the following steps: the moving rail is specifically two V-shaped slide rails fixedly welded to the top of the mast, the open ends of the two V-shaped slide rails are arranged opposite each other, and the water baffle is arranged between the two V-shaped slide rails.

[0020] The technical problem to be solved by this utility model can be further achieved through the following steps: the top of the main frame is provided with two pairs of hinge seats, each pair of hinge seats is configured to be detachably connected to the bracket body; two support rods are fixedly provided inside the bracket body, each support rod is configured to be detachably connected to the power output end of the lifting mechanism.

[0021] The technical problem to be solved by this utility model can be further achieved through the following steps: a movable frame is slidably provided on one side of the main frame, a support leg is provided at the bottom of the movable frame, and a hydraulic winch is installed on the top of the movable frame.

[0022] The technical problem to be solved by this utility model can be further achieved through the following steps: the base is provided with a turntable positioning mechanism, the turntable positioning mechanism includes a positioning block that is pressed against the turntable, and the positioning block is detachably installed on the base by bolts.

[0023] The technical problem to be solved by this utility model can be further achieved through the following steps: a movable seat is fixedly provided at the bottom of the power head, and a mast positioning mechanism is provided between the movable seat and the bracket body. The mast positioning mechanism includes a stop block provided on one side of the mast. One end of the stop block is inserted into the movable seat, and the other end of the stop block is inserted into the stop seat fixedly mounted on the bracket body.

[0024] Compared with existing technologies, the beneficial effects of this utility model are as follows: by replacing the traditional top rod with a ground anchor to directly anchor the inner wall of the tunnel, the risk of overall machine displacement and borehole deviation caused by drilling vibration is completely eliminated, while reducing the high-frequency noise generated by the rigid collision of the top rod; the slewing joint of the guide component can adapt to the left and right swing of the wire rope inclination angle, eliminating the influence of lateral force on the deformation of the support structure, significantly reducing abnormal wear of the wire rope, and eliminating the risk of equipment falling from a height due to structural deformation; the auxiliary support seat and pipe clamp cooperate with the external auxiliary support to enhance the bending stiffness of the mast during deep hole drilling; the combination design of V-shaped slide rail and water baffle plate not only ensures the smooth movement of the power head, but also prevents mud from eroding the drive cylinder; the bracket body, lifting mechanism and turntable positioning mechanism can achieve rapid vertical 180° and horizontal 360° adjustment to adapt to the multi-angle opening requirements of narrow tunnels. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a left-side view of the present invention;

[0027] Figure 3 This is a schematic diagram of the mast of this utility model;

[0028] Figure 4 for Figure 3 A schematic diagram of the cross-section of the midmast;

[0029] Figure 5 A cross-sectional view of the guide component;

[0030] In the diagram: 1. Base; 2. Turntable; 3. Main frame; 4. Bracket; 5. Mast; 6. Lifting mechanism; 7. Clamping and unhooking device; 8. Overhead crane; 9. Moving rail; 10. Power head; 11. Connecting seat I; 12. Connecting shaft I; 13. Ground anchor; 14. Positioning hole; 15. Connecting seat II; 16. Connecting shaft II; 17. Slewing joint; 18. Side plate; 19. Wheel axle; 20. Pulley; 21. Positioning groove; 22. Mounting plate; 23. Support plate; 24. Reinforcing rib plate; 25. Anti-slip teeth; 26. Secondary support seat; 27. Pipe clamp; 28. Positioning rod; 29. ​​Drive cylinder; 30. Water baffle; 31. V-shaped slide rail; 32. Hinge seat; 33. Support rod; 34. Moving frame; 35. Support leg; 36. Hydraulic winch; 37. Positioning block; 38. Moving seat; 39. Stop block; 40. Stop seat. Detailed Implementation

[0031] The specific technical solutions of this utility model are further described below to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0032] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0033] Please refer to Figure 1-5 An improved fully hydraulic tunnel drilling rig includes a base 1, a turntable 2 mounted on the base 1, a main frame 3 mounted on the turntable 2, a bracket body 4 hinged to the main frame 3, and a mast 5 mounted on the bracket body 4 and equipped with a drilling unit. The main frame 3 is also equipped with a lifting mechanism 6 that drives the bracket body 4 to rotate upward along the hinge to adjust the pitch angle of the mast 5. The lifting mechanism 6 is specifically a lifting cylinder hinged to the main frame 3.

[0034] The drilling unit includes a clamping and unhooking device 7 installed at the front of the mast 5, a crane 8 installed at the rear of the mast 5, a moving rail 9 installed on the mast 5 between the clamping and unhooking device 7 and the crane 8, and a power head 10 slidably installed on the moving rail 9.

[0035] An anchoring assembly for enhancing drilling stability is installed at the front section of mast 5, and a guiding assembly for enhancing coring stability is installed at the rear section of mast 5.

[0036] The anchoring assembly includes a connecting seat I11 fixedly installed at the front end of the mast 5, a connecting shaft I12 transversely passing through the connecting seat I11, and a ground anchor 13 installed at the front of the connecting seat I11 and capable of swinging up and down around the connecting shaft I12. The ground anchor 13 is symmetrically provided with positioning holes 14 for external anchor rods to pass through.

[0037] During drilling, the ground anchor 13 is engaged on the surface to be drilled, and the anchor rod is driven into the positioning hole 14 to completely anchor the mast 5 to the surface to be drilled. Compared with the telescopic top rod structure of the existing technology, it can effectively eliminate the risk of machine displacement and borehole deviation caused by vibration of the drilling rig, while reducing the high-frequency noise generated by the rigid collision of the top rod.

[0038] The guide assembly includes a connecting seat II15 fixedly installed at the bottom of the mast 5, a connecting shaft II16 longitudinally passing through the connecting seat II15, a slewing joint 17 installed at the bottom of the connecting seat II15 and capable of swinging left and right around the connecting shaft II16, two side plates 18 fixedly installed on the slewing joint 17 and arranged opposite to each other, a wheel axle 19 transversely passing through the two side plates 18, and a pulley 20 rotatably installed on the wheel axle 19 between the two side plates 18 via bearings. The outer circumferential surface of the pulley 20 is provided with a positioning groove 21 that cooperates with an external steel wire rope; the positioning groove 21 is specifically V-shaped.

[0039] During coring, the wire rope is released via the hydraulic winch 36, guided by the pulley 20 and the overhead crane 8, and then connected to the bottom coring device. When the wire rope is subjected to lateral load due to the deflection angle of the drum, the vibration of the drill rod, or the resistance of the rock strata, the pulley 20 is adaptively deflected with the slewing joint 17 to ensure that the rope is on the center line of the bottom of the V-groove, thereby eliminating the deformation of the telescopic frame due to excessive lateral force and reducing the probability of wire rope wear.

[0040] Specifically, the ground anchor 13 includes an outer frame and an inner support. The outer frame includes an installation plate 22 connected to the connecting seat I11. Support plates 23 extend horizontally from the upper and lower edges of the installation plate 22, forming a U-shaped structure with the installation plate 22 and the two support plates 23 opening forward. The inner support includes multiple reinforcing ribs 24 staggered within the opening of the U-shaped structure, each reinforcing rib 24 being fixedly connected to the installation plate 22. The positioning holes 14 are symmetrically opened on the installation plate 22.

[0041] In the above structure, the end of the support plate 23 away from the mast 5 is provided with anti-slip teeth 25 for abutting against the inner wall of the tunnel. A secondary support seat 26 is fixedly installed on the bottom surface of the mast 5 below the power head 10. One end of the secondary support seat 26 is fixedly fitted with a pipe clamp 27 that cooperates with the external secondary support. The external secondary support can be any pipe-like object fixed to the drilled surface. By setting the anti-slip teeth 25 and the secondary support seat 26, the stability during deep hole drilling is further enhanced, and the drilling quality is improved.

[0042] Specifically, a downward-facing moving groove is provided on the top surface of the mast 5. Positioning rods 28 are horizontally inserted through both ends of the mast 5 at the front and rear ends of the moving groove. A drive cylinder 29 is installed between the two positioning rods 28 to drive the power head 10 to slide and adjust its position on the moving rail 9. The piston rod of the drive cylinder 29 is hinged to the two positioning rods 28, and the cylinder barrel of the drive cylinder 29 is connected to the power head 10 for driving. The power head 10 reciprocates forward and backward through hydraulic pressure applied to the drive cylinder 29. The drive cylinder 29 uses a two-stage equal thrust cylinder, ensuring that the feed force and lifting force of the tunnel drilling rig are equal, thus guaranteeing the drilling and extraction capabilities of the tunnel drilling rig.

[0043] Specifically, a baffle plate 30 is fixedly covered at the opening of the moving trough. The baffle plate 30 seals the moving trough, thereby preventing mud particles from directly washing over and damaging the cylinder rod, protecting the cylinder as much as possible, and extending its service life.

[0044] In the above structure, the moving rail 9 specifically consists of two V-shaped slide rails 31 fixedly welded to the top of the mast 5. The open ends of the two V-shaped slide rails 31 are arranged opposite each other, and the baffle plate 30 is arranged between the two V-shaped slide rails 31. The V-shaped slide rails 31 enable higher guiding accuracy when the power head 10 slides forward and backward. Even if wear causes gaps, the V-shaped slide rails 31 can compensate in time, ensuring the stability of the drilling rig during tunnel drilling.

[0045] The top of the main frame 3 is provided with two pairs of hinge seats 32, each pair of hinge seats 32 being detachably connected to the bracket body 4. The bracket body 4 is internally fixed with two support rods 33, each support rod 33 being detachably connected to the power output end of the lifting mechanism 6. In use, by mounting the bracket body 4 on either the front or rear pair of hinge seats 32 and mounting the power output end of the lifting mechanism 6 on the support rod 33, the bracket body 4 can be driven to rotate upwards along the hinge joint to adjust the pitch angle of the mast 5. The design of the front and rear double support rods 33 ensures that this invention can flexibly adjust the lifting arm to adapt to various working conditions.

[0046] Specifically, a movable frame 34 is slidably mounted on one side of the main frame 3, a support leg 35 is provided at the bottom of the movable frame 34, and a hydraulic winch 36 is mounted on the top of the movable frame 34. During transportation, the hydraulic winch 36 can be retracted into the main frame 3 via the movable frame 34, effectively reducing the space occupied; the support leg 35 can provide solid support for the movable frame 34, effectively improving the stability of the hydraulic winch 36 during rope core extraction.

[0047] Specifically, the base 1 is provided with a turntable positioning mechanism, which includes a positioning block 37 that is pressed against the turntable 2. The positioning block 37 is detachably installed on the base 1 by bolts (not shown).

[0048] Specifically, a movable seat 38 is fixedly installed at the bottom of the power head 10. A mast positioning mechanism is provided between the movable seat 38 and the bracket body 4. The mast positioning mechanism includes a stop block 39 located on one side of the mast 5. One end of the stop block 39 is inserted into the movable seat 38, and the other end of the stop block 39 is inserted into the stop seat 40 fixedly mounted on the bracket body 4. By releasing or pulling out the stop block 39, the hydraulic cylinder 29 is driven to move forward and backward to adjust the position of the mast 5.

[0049] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. An improved fully hydraulic tunnel drilling rig, characterized in that: It includes a base, a turntable mounted on the base, a main frame mounted on the turntable, a bracket body hinged to the main frame, and a mast mounted on the bracket body and carrying a drilling unit. The main frame also has a lifting mechanism installed inside to drive the bracket body to flip upward along the hinge to adjust the pitch angle of the mast. The drilling unit includes a clamping and unhooking device installed at the front of the mast, a crane installed at the rear of the mast, a moving rail installed on the mast between the clamping and unhooking device and the crane, and a power head slidably installed on the moving rail; An anchoring assembly for enhanced drilling stability is installed at the front section of the mast, and a guiding assembly for enhanced coring stability is installed at the rear section of the mast. The anchoring assembly includes a connecting seat I fixedly installed at the front end of the mast, a connecting shaft I transversely passing through the connecting seat I, and a ground anchor installed at the front of the connecting seat I and capable of swinging up and down around the connecting shaft I. The ground anchor is symmetrically provided with positioning holes for external anchor rods to pass through. The guide assembly includes a connecting seat II fixedly installed at the bottom of the mast, a connecting shaft II longitudinally passing through the connecting seat II, a slewing joint installed at the bottom of the connecting seat II and swaying left and right around the connecting shaft II, two side plates fixedly installed on the slewing joint and arranged opposite each other, a wheel axle transversely passing through the two side plates, and a pulley rotatably installed on the wheel axle between the two side plates via a bearing. The outer circumferential surface of the pulley is provided with a positioning groove that cooperates with an external steel wire rope.

2. The improved full hydraulic raise boring machine according to claim 1, characterized in that: The ground anchor includes an outer frame and an inner support. The outer frame includes a mounting plate connected to the connecting seat I. Support plates extend horizontally from the upper and lower edges of the mounting plate, forming a U-shaped structure with the mounting plate and the two support plates opening forward. The inner support includes multiple reinforcing ribs staggered within the opening of the U-shaped structure, each reinforcing rib being fixedly connected to the mounting plate. The positioning holes are symmetrically opened on the mounting plate.

3. The improved fully hydraulic tunnel drilling rig according to claim 2, characterized in that: The end of the support plate away from the mast is provided with anti-slip teeth for abutting against the inner wall of the tunnel. A secondary support seat is fixedly installed on the bottom surface of the mast below the power head, and a pipe clamp that cooperates with the external secondary support is fixedly sleeved on one end of the secondary support seat.

4. The improved fully hydraulic tunnel drilling rig according to claim 1, characterized in that: The top surface of the mast has a downward-facing movable groove, and positioning rods are horizontally inserted on the mast at both ends of the movable groove. A drive cylinder is installed between the two positioning rods to drive the power head to slide back and forth on the movable rail for adjustment.

5. The improved fully hydraulic tunnel drilling rig according to claim 4, characterized in that: The opening of the movable trough is fixedly covered with a baffle plate to prevent mud particles from directly washing the cylinder rod.

6. The improved fully hydraulic tunnel drilling rig according to claim 5, characterized in that: The moving rails are specifically two V-shaped slide rails fixedly welded to the top of the mast, with the open ends of the two V-shaped slide rails facing each other, and the water baffle is located between the two V-shaped slide rails.

7. The improved fully hydraulic tunnel drilling rig according to claim 1, characterized in that: The top of the main frame is provided with two pairs of hinge seats, each pair of hinge seats is configured to be detachably connected to the bracket body; the bracket body is fixedly provided with two support rods, each support rod is configured to be detachably connected to the power output end of the lifting mechanism.

8. The improved fully hydraulic tunnel drilling rig according to claim 1, characterized in that: A movable frame is slidably mounted on one side of the main frame, with supporting legs at the bottom and a hydraulic winch mounted on the top of the movable frame.

9. The improved fully hydraulic tunnel drilling rig according to claim 1, characterized in that: The base is provided with a turntable positioning mechanism, which includes a positioning block that is pressed against the turntable. The positioning block is detachably installed on the base by bolts.

10. The improved fully hydraulic tunnel drilling rig according to claim 1, characterized in that: A movable seat is fixedly installed at the bottom of the power head. A mast positioning mechanism is provided between the movable seat and the bracket body. The mast positioning mechanism includes a stop block provided on one side of the mast. One end of the stop block is inserted into the movable seat, and the other end of the stop block is inserted into the stop seat fixedly mounted on the bracket body.

Images