A mast for a raise boring machine

Abstract

The utility model relates to a gallery drilling technology field especially relates to a mast for gallery drilling machine, including mast body, the front section of mast body is equipped with the anchoring assembly for reinforcing drilling stability, is equipped with the guide component for reinforcing the stability of coring in the rear section of mast body, the anchoring assembly includes the connecting seat I of fixed mounting in the front end of mast body, the connecting axle I that traverses is established on the connecting seat I, the utility model discloses the ground anchor seat of anchoring assembly and the cooperation of external anchor rod, will the mast body steady anchoring in the roadway, compared with the non-direct fixed structure of traditional top rod, can effectively avoid the technical problem that the whole machine displacement even drilling hole deflection is scrapped because of drill rod vibration, effectively reduces high frequency impact noise, improves the operation environment, the pulley of guide component can swing left and right around connecting axle II, can adaptively adjust position, reduce the eccentric wear of steel wire rope and pulley edge, prolong the service life of pulley, reduce maintenance cost, guarantee the success rate of coring.

Description

Technical Field

[0001] This utility model relates to the field of tunnel drilling technology, and in particular to a mast for a 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 masts used in current tunnel drilling rigs employ a top rod structure at the front end to support the tunnel roof. However, when drilling through high-hardness rock formations or fractured zones, the intense vibrations 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 generates high-frequency impact noise, which deteriorates the working environment.

[0004] Furthermore, current tunnel drilling rigs use fixed-structure pulleys to guide the wire rope on the mast. Due to the axial misalignment between the hydraulic winch drum and the overhead crane pulley, the wire rope often rubs against the pulley edge at a large angle during drum rope laying, resulting in severe uneven wear. Frequent pulley replacements not only increase maintenance costs but may also lead to core sampling failure due to wire rope slippage. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a mast for tunnel drilling rigs that is firmly fixed, produces less noise, reduces the need for steel wire ropes, and extends the service life of pulleys, in order to address the shortcomings of the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A mast for a tunnel drilling rig, characterized by:

[0008] The system includes a mast body, the front section of which is equipped with an anchoring assembly to enhance drilling stability, and the rear section of which is equipped with a guiding assembly to enhance core sampling stability.

[0009] The anchoring assembly includes a connecting seat I fixedly installed at the front end of the mast body, 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.

[0010] The guide assembly includes a connecting seat II fixedly installed at the bottom of the mast body, 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.

[0011] 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; the inner support includes a plurality of 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.

[0012] 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 body 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 front end of the mast body; and a pipe clamp that cooperates with the external secondary support is fixedly sleeved on one end of the secondary support seat.

[0013] The technical problem to be solved by this utility model can be further achieved through the following steps: a horizontal moving rail is fixedly installed on the mast body, a moving groove is opened downward on the top surface of the mast body, and a positioning rod is horizontally inserted on the mast body at both ends of the moving groove, and a driving oil cylinder is installed between the two positioning rods.

[0014] 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.

[0015] 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 body, 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.

[0016] The technical problem to be solved by this utility model can be further achieved through the following steps, wherein the positioning groove is specifically a V-shaped groove.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: by cooperating with the ground anchor seat of the anchoring component and the external anchor rod, the mast body is firmly anchored in the roadway. Compared with the non-direct fixing structure of the traditional top rod, it can effectively avoid the technical problem of the whole machine displacement or even drilling deviation and scrapping caused by the vibration of the drill rod, effectively reduce high-frequency impact noise, and improve the working environment; the pulley of the guide component can swing left and right around the connecting shaft II, which can adaptively adjust the position, reduce the wear between the wire rope and the edge of the pulley, extend the service life of the pulley, reduce maintenance costs, and ensure the success rate of core sampling. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a left-side view of the present invention;

[0020] Figure 3 This is a cross-sectional schematic diagram of the present invention;

[0021] Figure 4 A schematic diagram of the left sectional view of the guide component;

[0022] Figure 5 This is a top view of the ground anchorage.

[0023] In the diagram: mast body 1, connecting seat I2, connecting shaft I3, ground anchor 4, positioning hole 5, connecting seat II6, connecting shaft II7, slewing joint 8, side plate 9, wheel axle 10, pulley 11, positioning groove 12, mounting plate 13, support plate 14, reinforcing rib plate 15, anti-slip teeth 16, secondary support seat 17, pipe clamp 18, positioning rod 19, drive cylinder 20, water baffle 21, V-shaped slide rail 22. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] Please refer to Figure 1-5A mast for a tunnel drilling rig includes a mast body 1, an anchoring assembly for enhancing drilling stability is installed at the front section of the mast body 1, and a guiding assembly for enhancing core sampling stability is installed at the rear section of the mast body 1.

[0027] The anchoring assembly includes a connecting seat I2 fixedly installed at the front end of the mast body 1, a connecting shaft I3 transversely passing through the connecting seat I2, and a ground anchor 4 installed at the front of the connecting seat I2 and capable of swinging up and down around the connecting shaft I3. The ground anchor 4 is symmetrically provided with positioning holes 5 for external anchor rods to pass through.

[0028] During drilling, the ground anchor 4 is engaged on the surface to be drilled, and the anchor rod is driven into the positioning hole 5, which can completely anchor the mast body 1 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.

[0029] The guiding assembly includes a connecting seat II6 fixedly installed at the bottom of the mast body 1, a connecting shaft II7 longitudinally passing through the connecting seat II6, a slewing joint 8 installed at the bottom of the connecting seat II6 and capable of swinging left and right around the connecting shaft II7, two side plates 9 fixedly installed on the slewing joint 8 and arranged opposite each other, a wheel axle 10 transversely passing through the two side plates 9, and a pulley 11 rotatably mounted on the wheel axle 10 between the two side plates 9 via bearings. The outer circumferential surface of the pulley 11 is provided with a positioning groove 12 that cooperates with an external steel wire rope. Specifically, the positioning groove 12 is a V-shaped groove.

[0030] During coring, the wire rope is released by a hydraulic winch, guided by pulley 11 and the overhead crane, 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, drill rod vibration, or rock resistance, the pulley 11 is adaptively deflected with the slewing joint 8 to ensure that the rope is at 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.

[0031] Specifically, the ground anchor 4 includes an outer frame and an inner support. The outer frame includes an installation plate 13 connected to the connecting seat I2. Support plates 14 extend horizontally from the upper and lower edges of the installation plate 13, forming a U-shaped structure with the installation plate 13 and the two support plates 14. The inner support includes multiple reinforcing ribs 15 staggered in the opening of the U-shaped structure, and each reinforcing rib 15 is fixedly connected to the installation plate 13. The positioning holes 5 are symmetrically opened on the installation plate 13.

[0032] In the above structure, the end of the support plate 14 furthest from the mast body 1 is provided with anti-slip teeth 16 for abutting against the inner wall of the tunnel. A secondary support seat 17 is fixedly installed on the bottom front surface of the mast body 1, and a pipe clamp 18 that cooperates with the external secondary support is fixedly fitted onto one end of the secondary support seat 17. The external secondary support can be any pipe-like object fixed to the drilled surface. By setting the anti-slip teeth 16 and the secondary support seat 17, the stability during deep hole drilling is further enhanced, and the drilling quality is improved.

[0033] Specifically, a downward-facing moving groove is provided on the top surface of the mast body 1. Positioning rods 19 are transversely inserted through both ends of the mast body 1 at the front and rear ends of the moving groove. A drive cylinder 20 is installed between the two positioning rods 19. The piston rod of the drive cylinder 20 is hinged to the two positioning rods 19 respectively, and the cylinder barrel of the drive cylinder 20 is connected to an external power head for drive. The drive cylinder 20 achieves reciprocating drilling of the power head by applying hydraulic pressure. The drive cylinder 20 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.

[0034] Specifically, a baffle plate 21 is fixedly covered at the opening of the moving trough. By sealing the moving trough with the baffle plate 21, the mud liquid particles are prevented from directly washing and damaging the cylinder rod, thus protecting the cylinder as much as possible and extending its service life.

[0035] In the above structure, the moving rails are specifically two V-shaped slide rails 22 fixedly welded to the top of the mast body 1. The open ends of the two V-shaped slide rails 22 are arranged opposite each other, and the baffle plate 21 is arranged between the two V-shaped slide rails 22. The V-shaped slide rails 22 enable higher guiding accuracy when the power head slides forward and backward. Even if wear causes gaps, the V-shaped slide rails 22 can compensate in time, ensuring the stability of the drilling rig during tunnel drilling.

[0036] 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. A mast for a tunnel drilling rig, characterized in that: The system includes a mast body, the front section of which is equipped with an anchoring assembly to enhance drilling stability, and the rear section of which is equipped with a guiding assembly to enhance core sampling stability. The anchoring assembly includes a connecting seat I fixedly installed at the front end of the mast body, 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 body, 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 mast for a tunnel drilling rig 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. 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 mast for a tunnel drilling rig according to claim 2, characterized in that: The support plate is provided with anti-slip teeth at the end away from the mast body for abutting against the inner wall of the tunnel. A secondary support seat is fixedly installed on the bottom front end of the mast body, and a pipe clamp that cooperates with the external secondary support is fixedly sleeved at one end of the secondary support seat.

4. The mast for a tunnel drilling rig according to claim 1, characterized in that: A horizontal moving rail is fixedly installed on the mast body. A moving groove is opened on the top surface of the mast body facing downward. Positioning rods are horizontally inserted on the mast body at both ends of the moving groove. A drive cylinder is installed between the two positioning rods.

5. The mast for a 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 mast for a 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 body, with the open ends of the two V-shaped slide rails facing each other, and the water baffle is disposed between the two V-shaped slide rails.

7. The mast for a tunnel drilling rig according to claim 1, characterized in that: The positioning groove is specifically a V-shaped groove.

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