A propeller with a drill rod bending mechanism

Abstract

The present invention relates to a thruster with a drill rod bending mechanism, comprising a thruster main body, on which the drill rod bending mechanism is mounted, and a drill rod placed on the thruster main body is bent at its head by the drill rod bending mechanism; the drill rod bending mechanism is of an integral or split type and is located at the push-out end of the thruster main body; the present invention has the following beneficial effects: by arranging the drill rod bending mechanism on the thruster, not only is the structure more compact, but the construction process is also more convenient, and the construction efficiency and precision are also greatly improved; the head of the drill rod can be accurately bent at a required angle, and the head of the drill rod can be closely attached to the tunnel wall to drill a hole toward the tunnel face, thereby accurately controlling the problem of over-excavation and under-excavation in the tunnel.

Description

Technical Field

[0001] The invention belongs to the technical field of rock drilling equipment, and in particular relates to a thruster with a drill rod bending mechanism. Background Art

[0002] Traditional tunnel excavation requires smooth blasting, which requires the drill rod head to be in close contact with the tunnel wall as it drills toward the face. Due to the rock drill's external shape, the center-to-center distance is often over 80mm. Therefore, conventional thrusters cannot hold the drill rod head in close contact with the tunnel wall for drilling. Traditional construction methods rely on operator experience, using external force to bend the drill rod against the tunnel wall before drilling toward the face. However, the degree of curvature is difficult to control and relies entirely on experience. This makes it impossible to bend the drill rod head using a thruster, resulting in low efficiency and poor safety performance based on operator experience. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a thruster with a drill rod bending mechanism. The drill rod bending mechanism can accurately bend the drill rod according to the required angle, and the drill rod can be drilled close to the tunnel wall toward the tunnel face, accurately controlling the over-excavation and under-excavation problems of tunnel excavation.

[0004] The objective of the present invention is accomplished through the following technical solution: the thruster with a drill rod bending mechanism comprises a thruster body, on which the drill rod bending mechanism is mounted, and the drill rod placed on the thruster body is bent at the drill rod head by the drill rod bending mechanism; the drill rod bending mechanism is integral or split and is located at the ejection end of the thruster body.

[0005] Preferably, the drill rod bending mechanism is an integral type, which includes a base, a pitch frame, a drill rod sleeve, and a first driving cylinder. The base is mounted on the thruster body, the drill rod sleeve is mounted on the pitch frame, one end of the pitch frame is hinged to the base, the other end of the pitch frame is hinged to the driving end of the first driving cylinder, and the cylinder wall of the first driving cylinder is mounted on the base. The pitch frame is driven to rotate by the extension and retraction of the first driving cylinder to achieve the bending of the drill rod head.

[0006] Preferably, a mounting hole is provided at the upper end of the pitch frame, a circle of limiting grooves is provided at the radial end of the inner wall of the mounting hole, a circle of protrusions is provided at the radial end of the outer wall of the drill rod sleeve that is adapted to the limiting grooves, and the protrusions are embedded in the limiting grooves and fixed by pressure plates located on both sides of the protrusions.

[0007] Preferably, the pitch frame and the base are connected and fixed by a pin shaft, and the pitch frame and the radial end of the pin shaft are fixed by a bolt assembly to prevent relative movement between the pitch frame and the pin shaft.

[0008] Preferably, a top plate for close contact with the tunnel wall is installed on the base.

[0009] Preferably, the drill rod bending mechanism is a split type, which includes a bending assembly and a drill supporting assembly. The bending assembly is installed at the pushing end of the thruster body, and the drill supporting assembly is installed on the thruster body and is located behind the bending assembly; and the core of the insertion hole of the bending assembly for inserting the drill rod and the core of the insertion hole of the drill supporting assembly for inserting the drill rod are on the same axial line.

[0010] Preferably, the bending assembly includes an articulated sleeve and a second drive cylinder, the cylinder wall of the second drive cylinder is mounted on the thruster body, the drive end of the second drive cylinder is hinged to the articulated sleeve through a pin shaft and is limited by a cotter pin.

[0011] Preferably, the drill supporting assembly includes a mounting seat, a drill supporting sleeve, and a spring clip. The mounting seat is mounted on the thruster body, and the drill supporting sleeve is mounted on the mounting seat and clamped by the spring clip.

[0012] Preferably, a top plate for close contact with the tunnel wall is installed on the pushing end of the thruster body.

[0013] Preferably, the thruster body includes a thrust beam, a thrust cylinder, a thrust pulley, a rock drill, a return pulley, a thrust wire rope, and a return wire rope. The thrust pulley, rock drill, and return pulley are sequentially installed on the thrust beam and can slide freely along the axial direction of the thrust beam, and the drill rod bending mechanism is installed at the ejection end of the thrust beam and is located in front of the thrust pulley; the cylinder rod end of the thrust cylinder is fixed on the thrust beam, one end of the steel barrel of the thrust cylinder is connected to the thrust pulley, and the other end is connected to the return pulley; one end of the thrust wire rope is connected to the rock drill and passes around the thrust pulley, and the other end is fixed to the thrust beam; one end of the return wire rope is fixed to the thrust beam and passes around the return pulley, and the other end is fixed to the rock drill.

[0014] The beneficial effects of the present invention are as follows: by arranging a drill rod bending mechanism on the thruster, not only the structure is more compact but also the construction process is more convenient, and the construction efficiency and precision are greatly improved; the head of the drill rod can be accurately bent according to the required angle, and the head of the drill rod can be closely attached to the tunnel wall to drill a hole toward the tunnel face, accurately controlling the problem of over-excavation and under-excavation in the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a propeller with an integral drill rod bending mechanism of the present invention.

[0016] Figure 2It is a schematic diagram of the three-dimensional structure of the integral drill rod bending mechanism of the present invention.

[0017] Figure 3 It is a schematic diagram of the exploded structure of the integral drill rod bending mechanism of the present invention.

[0018] Figure 4 It is a schematic diagram of the main cross-sectional structure of the integral drill rod bending mechanism of the present invention.

[0019] Figure 5 It is a structural schematic diagram of a thruster with a split drill rod bending mechanism according to the present invention.

[0020] Figure 6 It is a schematic structural diagram of the bending assembly in the split drill rod bending mechanism of the present invention.

[0021] Figure 7 It is a structural schematic diagram of the drill rod supporting assembly in the split drill rod bending mechanism of the present invention.

[0022] The numbers in the accompanying drawings are: thruster body 1; drill rod bending mechanism 2; drill rod 3; propulsion beam 11; propulsion cylinder 12; propulsion pulley 13; rock drill 14; return pulley 15; propulsion wire rope 16; return wire rope 17; base 21; pitch frame 22; drill rod sleeve 23; first drive cylinder 24; pressure plate 25; pin 26; bolt assembly 27; top plate 28; mounting hole 22-1; limit groove 22-2; protrusion 23-1; bending assembly 2A; articulated sleeve 2A-1; second drive cylinder 2A-2; cotter pin 2A-3; drill support assembly 2B; mounting seat 2B-1; drill support sleeve 2B-2; spring clip 2B-3; slot 2B-4; mounting slot 2B-5. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings: Figure 1 、 5 As shown, the present invention includes a thruster body 1, on which a drill rod bending mechanism 2 is installed. A drill rod 3 placed on the thruster body is bent at its head by the drill rod bending mechanism 2, and the drill rod 3 is fixed by the drill rod body and the drill head through a threaded connection; the drill rod bending mechanism 2 is integral or split and is located at the push-out end of the thruster body 1; by arranging the drill rod bending mechanism on the thruster, not only the structure is more compact but also the construction process is more convenient, and the construction efficiency and precision are greatly improved; the drill rod extending from the thrust beam can be bent to a desired angle, and the head of the drill rod can be closely attached to the tunnel wall to drill a hole toward the tunnel face, thereby accurately controlling the over-excavation and under-excavation problems of the tunnel.

[0024] As attached Figures 2 to 4As shown, in order to improve the overall performance of the drill rod bending mechanism and facilitate installation and insertion of the drill rod, the drill rod bending mechanism 2 is an integral type, which includes a base 21, a pitching frame 22, a drill rod sleeve 23, and a first drive cylinder 24. The base 21 is mounted on the propeller body 1, and the drill rod sleeve 23 is mounted on the pitching frame 22. The rotating end of the pitching frame 22 is hinged on one side of the base 21, which is close to the propulsion sheave side; the pitching end of the pitching frame 22 is hinged to the driving end of the first drive cylinder 24, and the cylinder wall of the first drive cylinder 24 is mounted on the base 21. The first drive cylinder 24 is arranged obliquely along the length direction of the pitching frame 22, so that the pitching frame 22 is more stable during the pitching movement, and the oblique arrangement of the first drive cylinder 24 can play a pushing effect when the drill rod passes through the rock drill in the drilling process, so that the entire propeller is more stable during construction; the pitching frame 22 is driven to rotate by the extension and contraction of the first drive cylinder 24 to achieve the bending of the drill rod head.

[0025] A mounting hole 22-1 is provided at the upper end of the pitch frame 22, and the mounting holes are arranged along the length direction of the pitch frame; a circle of limiting grooves 22-2 are provided at the radial end of the inner wall of the mounting hole 22-1, and a circle of protrusions 23-1 are provided at the radial end of the outer wall of the drill rod sleeve 23 that matches the limiting grooves 22-2. The protrusions 23-1 are embedded in the limiting grooves 22-2 and are fixed by pressure plates 25 located on both sides of the protrusions. In this way, when the drill rod is inserted into the drill rod sleeve 23, the drill rod sleeve will not slide on the pitch frame 22 due to the influence of external forces. In addition, the drill rod sleeve can be prevented from moving during the drill rod bending and drilling process, thereby improving stability and safety.

[0026] The pitch frame 22 and the base 21 are connected and fixed by a pin shaft 26 , and the pitch frame 22 and the radial ends of the pin shaft 26 are fixed by a bolt assembly 27 to prevent relative movement between the pitch frame 22 and the pin shaft 26 .

[0027] A top plate 28 for close contact with the tunnel wall is installed on the base 21, and the top plate 28 protrudes from the pitch frame 22 along the length direction of the base. In this way, the top plate 28 not only makes the rock on the tunnel wall of the thruster more stable, but also prevents the pitch frame from colliding with the tunnel wall during rotation.

[0028] During operation, the top plate 28 is pressed against the rock of the tunnel wall, and the first drive cylinder 24 is extended and retracted, driving the pitch frame 22 and the pin 26, and the drill rod sleeve 23 to rotate together. The drill rod inserted into the drill rod sleeve 23 is bent, and the bent part of the drill rod is pressed against the tunnel wall. Drilling is done perpendicular to the tunnel face to achieve precise drilling.

[0029] As attached Figure 6 、 7As shown, in order to simplify the structure of the drill rod bending mechanism and make it more convenient to repair and replace parts, the drill rod bending mechanism 2 is a split type, which includes a bending component 2A and a drill supporting component 2B. The bending component 2A is installed at the push-out end of the propeller body 1, and the drill supporting component 2B is installed on the propeller body 1 and is located behind the bending component 2A; and the core of the insertion hole of the bending component 2A for inserting the drill rod and the core of the insertion hole of the drill supporting component 2B for inserting the drill rod are on the same axial core line, and are also on the same axial core line as the core of the inner hole of the propulsion sheave 13; this makes the concentricity of the drill rod inserted on the split drill rod bending mechanism 2 better, and also facilitates the smoother sliding of the drill rod during the operation of the rock drill, thereby improving construction efficiency.

[0030] The bending assembly 2A includes an articulated sleeve 2A-1 and a second driving cylinder 2A-2. The cylinder wall of the second driving cylinder 2A-2 is installed on the thruster body 1. The driving end of the driving cylinder 2A-2 is hinged to the articulated sleeve 2A-1 through a pin shaft and is limited by a cotter pin 2A-3 to prevent the articulated sleeve 2A-1 from rotating freely at the driving end of the second driving cylinder 2A-2; the axial core line of the articulated sleeve 2A-1 and the center line of the driving end of the second driving cylinder 2A-2 are distributed vertically, so that the force on the articulated sleeve 2A-1 is more uniform during the extension and retraction process of the second driving cylinder 2A-2, and the drill rod inserted in the articulated sleeve 2A-1 is more efficiently bent during the drilling process through the rock drill, and the stability of the entire thruster is also better during construction.

[0031] The drill supporting assembly 2B includes a mounting seat 2B-1, a drill supporting sleeve 2B-2, and a spring clip 2B-3. The mounting seat 2B-1 is installed on the thruster body 1. The drill supporting sleeve 2B-2 is installed in the mounting groove 2B-5 provided at the upper end of the mounting seat 2B-1 and is clamped by the spring clip 2B-3. The upper end of the mounting seat 2B-1 is provided with a clamping slot 2B-4 for installing the spring clip 2B-3. The clamping slot 2B-4 is located on both sides of the mounting slot 2B-5, and the clamping slot 2B-4 is located above the drill supporting sleeve 2B-2 in the mounting slot 2B-5. In this way, the drill supporting sleeve 2B-2 is clamped in the mounting seat 2B-1, and the drill supporting sleeve 2B-2 will not be separated from the mounting seat 2B-1 when the drill rod is bent through the bending assembly 2A, and the stability is better.

[0032] A top plate 28 for close contact with the tunnel wall is installed on the pushing end of the thruster body 1; the top plate 28 serves to make the rock on the tunnel wall of the thruster more stable.

[0033] During operation, the top plate 28 presses against the rock of the tunnel wall, and the second drive cylinder 2A-2 retracts, driving the articulated sleeve 2A-1 to move downward. At this time, the drill rod support sleeve 2B-2 still supports the drill rod and serves as a fulcrum. In this way, the end of the drill rod located on the articulated sleeve 2A-1 is bent, and the bent part of the drill rod is pressed against the tunnel wall. Drilling is carried out perpendicular to the tunnel face to achieve precise drilling.

[0034] The driving cylinder mentioned above is a hydraulic cylinder or a driving cylinder with equivalent effect.

[0035] The thruster body 1 includes a thrust beam 11, a thrust cylinder 12, a thrust pulley 13, a rock drill 14, a return pulley 15, a thrust wire rope 16, and a return wire rope 17. The thrust pulley 13, the rock drill 14, and the return pulley 15 are sequentially installed on the thrust beam 11 through a V-groove and can slide freely along the axial direction of the thrust beam, and the drill rod bending mechanism 2 is installed at the push-out end of the thrust beam 11 and is located in front of the thrust pulley 13; the cylinder rod end of the thrust cylinder 12 is fixed on the thrust beam 11, and one end of the steel drum of the thrust cylinder 12 is connected to the thrust pulley 13, and the other end is connected to the return pulley 15; one end of the thrust wire rope 16 is connected to the rock drill 14, and passes around the thrust pulley 13, and the other end is fixed to the thrust beam 11; one end of the return wire rope 17 is fixed on the thrust beam 11, and passes around the return pulley 15, and the other end is fixed to the rock drill 14.

[0036] The drill rod 3 passes through the inner hole of the drill rod sleeve 23 or sequentially passes through the inner hole of the hinge sleeve 2A-1, the inner hole of the drill support sleeve 2B-2 and the inner hole of the propulsion sheave 13, and is connected to the driving end of the rock drill 14 by a threaded connection.

[0037] When the propulsion cylinder 12 is extended, the steel drum of the propulsion cylinder 12 drives the propulsion sheave 13, and the return sheave 15 slides axially along the propulsion beam 11, and through the propulsion sheave 13, drives the propulsion wire rope 16 to pull the rock drill 14 to slide axially along the propulsion beam 11.

[0038] When the propulsion cylinder 12 retracts, the steel drum of the propulsion cylinder 12 drives the propulsion sheave 13, and the return sheave 15 slides axially along the propulsion beam 11, and through the return sheave 15, drives the return wire rope 17 to pull the rock drill 14 to slide axially along the propulsion beam 11.

[0039] The present invention is not limited to the above-mentioned embodiments. Regardless of any changes in shape or material composition, any structural design provided by the present invention is a variation of the present invention and should be considered within the scope of protection of the present invention.

Claims

1. A thruster with a drill rod bending mechanism, comprising a thruster body (1), characterized in that: A drill rod bending mechanism (2) is installed on the propeller body (1), and a drill rod (3) placed on the propeller body is bent at the drill rod head by the drill rod bending mechanism (2); the drill rod bending mechanism (2) is integral and located at the push-out end of the propeller body (1); The drill rod bending mechanism (2) comprises a base (21), a pitching frame (22), a drill rod sleeve (23), and a first driving cylinder (24); the base (21) is mounted on the thruster body (1); the drill rod sleeve (23) is mounted on the pitching frame (22); one end of the pitching frame (22) is hinged to the base (21); the other end of the pitching frame (22) is hinged to the driving end of the first driving cylinder (24); and the cylinder wall of the first driving cylinder (24) is mounted on the base (21); the pitching frame (22) is driven to rotate by the extension and contraction of the first driving cylinder (24) to achieve bending of the drill rod head; The first driving cylinder (24) is arranged obliquely along the length direction of the pitch frame (22); The upper end of the pitch frame (22) is provided with a mounting hole (22-1), the radial end of the inner wall of the mounting hole (22-1) is provided with a circle of limiting grooves (22-2), the radial end of the outer wall of the drill rod sleeve (23) adapted to the limiting grooves (22-2) is provided with a circle of protrusions (23-1), the protrusions (23-1) are embedded in the limiting grooves (22-2) and fixed by pressing plates (25) located on both sides of the protrusions.

2. The thruster with a drill rod bending mechanism according to claim 1, characterized in that: The pitch frame (22) and the base (21) are connected and fixed via a pin shaft (26), and the pitch frame (22) and the radial ends of the pin shaft (26) are fixed via a bolt assembly (27) to prevent relative movement between the pitch frame (22) and the pin shaft (26).

3. The thruster with a drill rod bending mechanism according to claim 1, characterized in that: A top plate (28) for contacting closely with the tunnel wall is mounted on the base (21).

4. The thruster with a drill rod bending mechanism according to claim 1, characterized in that: The thruster body (1) comprises a thrust beam (11), a thrust cylinder (12), a thrust pulley (13), a rock drill (14), a return pulley (15), a thrust wire rope (16), and a return wire rope (17); the thrust pulley (13), the rock drill (14), and the return pulley (15) are sequentially mounted on the thrust beam (11) and can slide freely along the axial direction of the thrust beam; and the drill rod bending mechanism (2) is mounted at the ejection end of the thrust beam (11) and is located in front of the thrust pulley (13); The end of the cylinder rod of the propulsion cylinder (12) is fixed on the propulsion beam (11); one end of the steel drum of the propulsion cylinder (12) is connected to the propulsion rope pulley (13), and the other end is connected to the return rope pulley (15); one end of the propulsion wire rope (16) is connected to the rock drill (14) and passes around the propulsion rope pulley (13), and the other end is fixed to the propulsion beam (11); one end of the return wire rope (17) is fixed to the propulsion beam (11), passes around the return rope pulley (15), and the other end is fixed to the rock drill (14).

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