Drill rod centralizer for rotary drill rig

Abstract

The drill rod centralizer comprises a first driving mechanism and a rod supporting device assembly, and the first driving mechanism is installed on the side face of a tower of the rotary drill through an installation plate; the rod centralizer assembly is used for centralizing a drill rod, and the rod centralizer assembly is movably connected with the first driving mechanism; the first driving mechanism is used for driving the rod supporting device assembly to rotate around the movable connecting point; when the first driving mechanism is located at the first working position, the rod supporting device assembly is far away from the tower of the rotary drill rig; and when the first driving mechanism is located at the second working position, the rod supporting device assembly is fixed to the tower of the rotary drill rig. When the rod supporting device assembly is not used, the rod supporting device assembly can be far away from the tower of the rotary drill rig through the first driving mechanism, and interference to use of other parts of equipment is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial and mining machinery, and particularly relates to a drill pipe aligner for a rotary drill rig. Background Art

[0002] A rotary drill rig is generally applied to the blasting hole drilling operation of a large open-pit mine. The operation process of the rotary drill rig is to drill a hole more than ten meters or even deeper on the surface of the mining area, and the conventional lengths of the drill pipes configured for the drill rig are generally 3 meters, 6 meters or 9 meters. Therefore, during the actual operation process, the power device of the drill rig needs to be connected to at least two or more drill pipes to meet the depth requirement. During the drilling operation process, the rod support device needs to work during the processes of rod connection, rod storage or the movement of the drill pipe carried by the power device of the drill rig. Rod connection is to connect different drill pipes together in the form of screw threads; after the drilling is completed, storing the drill pipes back into the drill pipe storage is called rod storage.

[0003] Grant publication number: CN203939456U, application date: The drill pipe aligning device of a rotary drill rig. The utility model discloses a drill pipe aligning device of a rotary drill rig, which is installed on the drill tower of the rotary drill rig and includes a left jaw clamp, a right jaw clamp and an oil cylinder. The left jaw clamp includes a first clamping part, a first driving part and a first hinge part located between the first clamping part and the first driving part; the right jaw clamp includes a second clamping part, a second driving part and a second hinge part located between the second clamping part and the second driving part. The first hinge part and the second hinge part are hinged through a hinge shaft fixedly arranged on the drill tower, and the first driving part and the second driving part are respectively hinged to two ends of the oil cylinder. By adopting the drill pipe aligning device of the rotary drill rig of this utility model, the generation of larger stress due to the non-concentricity between the drill pipe and the drill bit assembly can be avoided.

[0004] In the above prior art, two calipers form a scissors type and are fixed by a pin shaft. When the piston rod of the oil cylinder extends, the two calipers rotate in the opposite direction around the pin shaft simultaneously to clamp the drill pipe. Although this method can ensure the synchronization of the two calipers, the structure of the caliper itself limits the volume of the oil cylinder, resulting in insufficient driving force and easy shaking of the caliper. In addition, the degrees of freedom of the oil cylinder and the caliper are relatively large, and the caliper and the whole oil cylinder swing left and right around the pin shaft along with the shaking of the drill pipe, so that the rod connection or rod storage cannot be accurately carried out.

[0005] In addition, when the caliper is severely worn and needs to be replaced, the disassembly of the caliper is relatively cumbersome, and it is necessary to disassemble the central pin shaft of the caliper and the pin shaft connected to the oil cylinder. Summary of the Utility Model

[0006] In view of the defects in the prior art that the centering device is always located on the drill tower, which is likely to interfere with the operation of the remaining parts of the equipment, and the caliper cannot accurately connect or store the drill pipes, and it is rather cumbersome to replace the caliper, the purpose of the present utility model is to provide a drill pipe centering device for a cone drill.

[0007] The technical solution provided by the present utility model is as follows:

[0008] A drill pipe centering device for a cone drill, comprising:

[0009] A first driving mechanism, which is installed on the side of the drill tower of the cone drill through a mounting plate;

[0010] A drill pipe centering component, which is used to center the drill pipe, and the drill pipe centering component is movably connected to the first driving mechanism;

[0011] Wherein, the first driving mechanism is used to drive the drill pipe centering component to rotate around the movable connection point;

[0012] When the first driving mechanism is in the first working position, the drill pipe centering component is away from the drill tower of the cone drill;

[0013] When the first driving mechanism is in the second working position, the drill pipe centering component is fixed to the drill tower of the cone drill.

[0014] Further, the drill pipe centering component includes a rotating component and a caliper component. One end of the rotating component is movably connected to the mounting plate and the first driving mechanism at the same time; the caliper component is used to clamp and center the drill pipe, and includes a left caliper component and a right caliper component. The right caliper component is installed on the rotating component, and the left caliper component can move away from or close to the right caliper component under the drive of a second driving mechanism.

[0015] Further, one end of the second driving mechanism is movably connected to the left caliper component, and the other end is fixedly installed on the rotating component; the first driving mechanism is used to drive the rotating component together with the second driving mechanism to approach or move away from the drill tower of the cone drill.

[0016] Further, the left caliper component includes a left caliper body and a swing arm detachably connected to the left caliper body. The end of the swing arm is movably connected to the second driving mechanism, and the upper end is movably connected to a connecting block, and the connecting block is fixedly installed on the rotating component.

[0017] Further, the left caliper component further includes a main shaft, the main shaft passes through the through hole of the connecting block and can rotate relative to the through hole; the upper end of the swing arm is fixedly connected to the main shaft.

[0018] Further, the rotating component includes:

[0019] A rotating shaft, which is hinged to the mounting plate;

[0020] The rod support bracket, one end of which is fixedly installed on the rotating shaft;

[0021] Wherein, the first driving mechanism is used to drive the rotating shaft to rotate around its hinge point with the mounting plate.

[0022] Furthermore, there is a pair of rod support brackets, which are arranged symmetrically in parallel. There is a pair of connecting blocks, which are respectively installed on the two rod support brackets. The swing arm and the second driving mechanism are both located between the rod support brackets.

[0023] Furthermore, the right caliper assembly includes a right caliper body and a fixing plate detachably connected to the right caliper body, and the fixing plate is fixedly connected to the rotating assembly.

[0024] Furthermore, a docking block is provided at one end of the rod support bracket away from the rotating shaft, and a groove plate adapted to the docking block is installed on the other side of the tower of the rotary drill rig.

[0025] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects:

[0026] When the rod support component of the present utility model is not needed, the rod support component can be moved away from the tower of the rotary drill rig through the first driving mechanism, so as to avoid interfering with the use of other parts of the equipment.

[0027] One end of the second driving mechanism is limited and fixed, and the degree of freedom is greatly reduced, so that the caliper assembly is not easy to shake when clamping the drill pipe, thereby improving the efficiency and accuracy of rod connection or rod storage.

[0028] In addition, the caliper body is convenient to replace to be applicable to drill pipes of different diameters. Description of the Drawings

[0029] Figure 1 Schematic diagram of the relative position relationship between the drill pipe aligner and the tower in an embodiment of the present application;

[0030] Figure 2 In an embodiment of the present application Figure 1 Partial enlarged structural schematic diagram of node A;

[0031] Figure 3 Overall structural schematic diagram of the drill pipe aligner in an embodiment of the present application;

[0032] Figure 4 In an embodiment of the present application Figure 3 Partial enlarged structural schematic diagram of node B;

[0033] Figure 5 Front view of the drill pipe aligner in an embodiment of the present application;

[0034] Figure 6 It is a schematic structural diagram of the left caliper assembly in an embodiment of the present application;

[0035] Figure 7 It is a schematic structural diagram of the rod holder assembly in an embodiment of the present application.

[0036] Description of the reference numerals in the schematic diagram:

[0037] The first driving mechanism 1;

[0038] The rod holder assembly 2, the left caliper assembly 21, the left caliper body 211, the swing arm 212, the main shaft 213, the right caliper assembly 22, the right caliper body 221, the fixing plate 222, the second driving mechanism 23, the connecting block 24, the rotating shaft 25, the rod holder bracket 26, the docking block 27, the groove plate 28;

[0039] The mounting plate 3;

[0040] The stopper 41, the adjusting block 42, the adjusting part 43. Specific embodiments

[0041] To further understand the content of the present invention, the present invention will be described in detail in combination with the drawings and embodiments.

[0042] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions that the present invention can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of narration and are not used to limit the scope that can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope that the present invention can be implemented.

[0043] The working principle of the rotary drill is to use rotary impact to break rocks to form drill holes. The rotary drill mainly consists of drill pipes, a rotary mechanism, a pressurizing and lifting mechanism, etc. During operation, the rotary mechanism drives the drill pipe to rotate, and the drill pipe moves up and down along the tower through the pressurizing mechanism, and the power is transmitted to the roller bit through the drill pipe.

[0044] Specifically, under the action of axial pressure and torque, the roller bit rolls on the rock surface, and the cutting teeth on the roller bit break the rock by means of chiseling, shearing, scraping, etc. When the roller bit rolls, the roller teeth alternately contact the rock with single teeth and double teeth, causing periodic impact on the rock, thereby breaking the rock.

[0045] To ensure continuous drilling, compressed air with a certain pressure and flow rate is used to discharge the broken rock out of the hole. During the whole process, the roller bit works under the combined action of static pressure and dynamic pressure, realizing the crushing and discharging of the rock.

[0046] During the operation of the roller rig, rod connection and rod storage are required. Since the length of the drill pipe is generally 3 meters, 6 meters or 9 meters, in practice, due to the vibration of the roller rig itself or the shaking of the drill pipe, it is difficult to ensure the coaxiality of the upper and lower drill pipes, resulting in unsmooth rod connection and greatly reducing the working efficiency. Rod storage is to re-put the separated drill pipes into the drill pipe cups in the drill pipe storage. Similarly, in this process, it is also difficult to ensure the coaxiality of the central axis of the drill pipe and the drill pipe cup.

[0047] In addition, when the roller rig needs to move to the next drilling position after drilling the hole at the predetermined position, in order to improve the working efficiency, usually one drill pipe is reserved under the power mechanism and moves together with the traveling mechanism of the rig. At this time, the bottom of the drill pipe suspended under the power mechanism has no support and stabilization. As the rig moves, the shaking amplitude of the drill pipe becomes larger and larger.

[0048] It should be noted that the drill pipe connection hole of the power mechanism of the roller rig is coaxial with the limit clamp provided at the bottom of the tower. Since the drill pipe storage itself is provided with a rotation adjustment device, through its own rotation, a certain drill pipe cup is made coaxial with the drill pipe connection hole of the power mechanism.

[0049] A drill pipe aligner for a roller rig according to the present application is used to align the drill pipe during the process of rod connection and rod storage, and ensure the coaxiality of the drill pipe connected to the power mechanism and the drill pipe fixed by the limit clamp at the bottom of the tower.

[0050] A drill pipe aligner for a roller rig according to the present application includes a first driving mechanism 1 and a rod aligning component 2, which are movably connected. The first driving mechanism 1 is used to drive the rod aligning component 2 to rotate around the movable connection point. When the rod aligning component 2 is not needed, the first driving mechanism 1 is in the first working position, and the rod aligning component 2 is far away from the tower of the roller rig; when the rod aligning component 2 is needed, the first driving mechanism 1 is in the second working position, and the rod aligning component 2 is fixed on the tower of the roller rig.

[0051] The first driving mechanism 1 is connected to the tower of the roller rig through a mounting plate 3, and the mounting plate 3 is mounted on one side of the tower of the roller rig. The rod aligning component 2 is used to align the drill pipe and prevent it from shaking.

[0052] The rod aligning component 2 is used in cooperation with the power mechanism to ensure the coaxiality of the drill pipe connected under the power mechanism and the drill pipe in the limit clamp at the bottom of the tower, or ensure the coaxiality of the drill pipe connected under the power mechanism and the drill pipe cup in the drill pipe storage.

[0053] On the other side of the tower of the rotary drill, a grooved plate 28 is installed. When the first driving mechanism 1 is in the second working position, the rod support assembly 2 is inserted into the grooved plate 28 to fix the rod support assembly 2.

[0054] The rod support assembly 2 includes a rotating assembly and a caliper assembly. One end of the rotating assembly is movably connected to the mounting plate 3 and the first driving mechanism 1 at the same time. Driven by the first driving mechanism 1, the rotating assembly drives the caliper assembly to rotate synchronously.

[0055] The rotating assembly includes a rotating shaft 25 and a rod support bracket 26. The rod support 26 is fixedly connected to the rotating shaft 25. The rotating shaft 25 is the component that is specifically movably connected to the mounting plate 3 and the first driving mechanism 1 at the same time. The preferred way of the movable connection is hinged connection.

[0056] The rotating shaft 25 is hinged to the mounting plate 3. On the one hand, the mounting plate 3 can provide support and a force application point for the rotating assembly, avoiding the rotation of the rotating assembly being blocked during the rotation due to its own weight; on the other hand, it can also prevent the rotating assembly from exerting too much shear force on the first driving mechanism 1, avoiding excessive wear of the first driving mechanism 1 and making it difficult to drive the rotating assembly to rotate.

[0057] A pair of rod support brackets 26 are arranged in parallel and symmetrically. Connecting blocks 24 are arranged on them. A pair of connecting blocks 24 are also arranged symmetrically and are respectively arranged on the two rod support brackets 26. A second driving mechanism 23 is installed in the gap between the two rod support brackets 26. It should be noted that the degree of freedom of the second driving mechanism 23 is restricted. The second driving mechanism 23 is preferably a hydraulic cylinder. One end of the cylinder is limited by the rod support bracket 26 and cannot generate displacement. Except for the free contraction of one end of the telescopic rod, no other displacement in other directions can occur.

[0058] The second driving mechanism 23 is used to drive the caliper assembly to loosen or clamp the drill pipe. More specifically, the caliper assembly includes a left caliper assembly 21 and a right caliper assembly 22. The right caliper assembly 22 is installed on the rod support bracket 26. The left caliper assembly 21 includes a left caliper body 211 and a swing arm 212 detachably connected to the left caliper body 211. The end of the swing arm 212 is movably connected to the second driving mechanism 23, and the upper end of the swing arm 212 is movably connected to the connecting block 24. More specifically, the swing arm 212 is movably connected to the connecting block 24 through a main shaft 213.

[0059] The connecting block 24 is provided with a through hole. The main shaft 213 passes through the through hole. The main shaft 213 can rotate relative to the through hole. The main shaft 213 is fixedly connected to the swing arm. Therefore, the second driving mechanism 23 drives the swing arm 212 to rotate around the hinge point of the swing arm 212 and the connecting hole, so as to realize the left caliper assembly 21 moving away from or approaching the right caliper assembly 22.

[0060] The swing arms 212 are preferably a pair, and are arranged between a pair of connecting blocks 24 and the rod holder bracket 26. The right caliper assembly 22 includes a right caliper body 221 and a fixing plate 222 detachably connected to the right caliper body 221, and the fixing plate 222 is fixedly connected to the rod holder bracket 26.

[0061] Through the detachable left caliper body 211 and right caliper body 221, drill pipes with different diameters can be clamped, improving the flexibility and practicality of the equipment.

[0062] One end of the rod holder bracket 26 away from the rotating shaft 25 is provided with a docking block 27, and the docking block 27 is adapted to the groove plate 28. When the docking block 27 is inserted into the groove plate 28, the rotating assembly can be fixed to the tower of the rotary drill rig.

[0063] In addition, a fine-tuning mechanism is also provided between the rod holder brackets 26. The fine-tuning mechanism is used to finely adjust the swing arms 212 to make the swing arms 212 rotate slightly. This slight rotation is necessary because when the caliper assembly first clamps the drill pipe, it is necessary to ensure the stability of the drill pipe, so the clamping force is relatively large. When the drill pipe is relatively stable, the power mechanism needs to rotate the drill pipe to connect or disconnect it from the lower drill pipe. At this time, the clamping force of the caliper assembly needs to be slightly reduced so that the drill pipe can rotate within the caliper assembly. Therefore, a fine-tuning mechanism is required.

[0064] The fine-tuning mechanism includes a stop block 41, an adjustment block 42, and an adjustment part 43. The stop block 41 is fixedly installed between the rod holder brackets 26, and at the same time, the stop block 41 is located between the docking block 27 and the swing arms 212. The adjustment block 42 is fixedly installed between a pair of swing arms 212, and one end of the adjustment part 43 abuts against the stop block 41, and the other end is bolted to the adjustment block 42.

[0065] During the process of rotating the adjustment part 43, it is always necessary to keep the adjustment part 43 in contact with the stop block 41, and the swing arms 212 are rotated counterclockwise slightly by rotating the adjustment part 43.

[0066] Taking the connection of two drill pipes as an example, the process of using the equipment is as follows: The power mechanism of the equipment is lifted to the topmost position of the tower (at this time, the tower is perpendicular to the ground), the drill pipe magazine is rotated so that the drill pipe in a certain drill pipe cup is coaxial with the drill pipe connection hole of the power mechanism, the power mechanism descends, contacts and rotates with the drill pipe in the drill pipe magazine, and thus is tightened with the threaded end of the drill pipe. The drill pipe magazine retracts to avoid affecting the up and down movement of the power mechanism. The power device rises and lifts the drill pipe out of the drill pipe magazine. This drill pipe is the first drill pipe.

[0067] The power mechanism moves downward to drill the first drill pipe into the ground surface. Subsequently, the first drill pipe is limited by the limit clamp at the bottom of the tower to keep it stationary. The power mechanism reverses to separate it from the first drill pipe. The power mechanism moves upward to the top of the tower and repeats the connection action between the power mechanism and the drill pipe for the first time to connect the second drill pipe with the power mechanism. Then, the power mechanism suspending the second drill pipe moves downward and rotates to connect the second drill pipe with the first drill pipe by screw threads. At this time, due to the vibration of the drill rig itself and other reasons, the second drill pipe will swing and it is difficult to dock with the first drill pipe. That is, it is necessary to use the drill pipe aligner of the present application to assist in connecting the drill pipes.

[0068] When the second drill pipe moves downward to the docking port with the first drill pipe, the drill pipe aligner rotates towards the tower under the drive of the first drive mechanism 1 and finally fixes on the tower. The second drive mechanism 23 drives the left caliper assembly 21 to approach the right caliper assembly 22 to firmly clamp the second drill pipe and ensure that the second drill pipe is coaxial with the first drill pipe. At this time, the clamping force of the caliper assembly can be slightly reduced through the fine adjustment mechanism, and the power mechanism drives the second drill pipe to rotate to connect the second drill pipe with the first drill pipe by screw threads, and the connection of the drill pipes is completed.

[0069] The above schematically describes the present invention and its implementation manners. This description is not restrictive, and what is shown in the drawings is only one of the implementation manners of the present invention. The actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments to this technical solution without creative work without departing from the gist of the present invention creation, they shall fall within the protection scope of the present invention.

Claims

1. A drill pipe centralizer for a rotary drill rig, characterized in that: Including, A first driving mechanism (1), which is installed on the side of the tower of the rotary drill through a mounting plate (3); A rod support assembly (2), which is used to straighten the drill pipe, and the rod support assembly (2) is movably connected to the first driving mechanism; Wherein, the first driving mechanism (1) is used to drive the rod support assembly (2) to rotate around the movable connection point; When the first driving mechanism (1) is in the first working position, the rod support assembly (2) is far away from the tower of the rotary drill; When the first driving mechanism (1) is in the second working position, the rod support assembly (2) is fixed to the tower of the rotary drill.

2. The drill pipe centralizer for a rotary drill rig according to claim 1, wherein: The rod support assembly (2) includes, A rotating assembly, one end of which is movably connected to the mounting plate (3) and the first driving mechanism (1) at the same time; A caliper assembly, which is used to clamp and straighten the drill pipe, including a left caliper assembly (21) and a right caliper assembly (22). The right caliper assembly (22) is installed on the rotating assembly, and the left caliper assembly (21) can move away from or close to the right caliper assembly (22) under the drive of the second driving mechanism (23).

3. The drill pipe centralizer for a rotary drill rig according to claim 2, characterized in that: One end of the second driving mechanism (23) is movably connected to the left caliper assembly (21), and the other end is fixedly installed on the rotating assembly; the first driving mechanism (1) is used to drive the rotating assembly together with the second driving mechanism (23) to approach or move away from the tower of the rotary drill.

4. The drill pipe centralizer for a rotary drill rig according to claim 3, characterized in that: The left caliper assembly (21) includes a left caliper body (211) and a swing arm (212) detachably connected to the left caliper body (211). The end of the swing arm (212) is movably connected to the second driving mechanism (23), and the upper end is movably connected to a connecting block (24). The connecting block (24) is fixedly installed on the rotating assembly.

5. The drill pipe centralizer for a rotary drill rig according to claim 4, characterized in that: The left caliper assembly (21) further includes a main shaft (213), which passes through the through hole of the connecting block (24) and can rotate relative to the through hole; the upper end of the swing arm (212) is fixedly connected to the main shaft (213).

6. The drill pipe aligner for a rotary drill rig according to claim 5, characterized in that: The rotating assembly includes, A rotating shaft (25), which is hinged to the mounting plate (3); A rod support bracket (26), one end of which is fixedly installed on the rotating shaft (25); Wherein, the first driving mechanism (1) is used to drive the rotating shaft (25) to rotate around its hinge point with the mounting plate (3).

7. The drill pipe centralizer for a rotary drill rig according to claim 6, characterized in that: There are a pair of rod support brackets (26), which are arranged in parallel and symmetrically. There are a pair of connecting blocks (24), which are respectively installed on the two rod support brackets (26). The swing arm (212) and the second driving mechanism (23) are both located between the rod support brackets (26).

8. The drill pipe centralizer for a rotary drill rig according to claim 2, characterized in that: The right caliper assembly (22) includes a right caliper body (221) and a fixing plate (222) detachably connected to the right caliper body (221). The fixing plate (222) is fixedly connected to the rotating assembly.

9. The drill pipe centralizer for a rotary drill rig according to claim 6, characterized in that: One end of the rod support bracket (26) far away from the rotating shaft (25) is provided with a docking block (27), and a groove plate (28) adapted to the docking block (27) is installed on the other side of the tower of the rotary drill.

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