Drill rod clamp holder for exploration drilling machine

Abstract

The utility model relates to a drill rod clamping device for an exploration drilling machine. The drill rod clamping device comprises a base, a rotary swing arm assembly, a guide block, a clamping jaw assembly and a driving mechanism. The clamping jaw assembly is used for clamping drill rods with different diameters; the guide block is fixed on the base; the contact surfaces of the guide block and the clamping jaw assembly are inclined surfaces which are parallel to each other; the rotary swing arm assembly is movably connected with the base, and one end of the rotary swing arm assembly is movably connected with the clamping jaw assembly. The rotary swing arm assemblies are synchronously close to or away from each other; the driving mechanism is located on the side face of the base, and the two ends of the driving mechanism are movably connected with the rotary swing arm assemblies to drive the rotary swing arm assemblies to rotate. Supporting counterforce is provided for the clamping jaw assembly through the obliquely-arranged guide block, and the heavier the drill rod is, the larger the supporting counterforce is; the horizontal decomposition force provided by the supporting reaction force points to the drill rod, stable clamping force is provided for the clamping jaw assembly, and a self-locking structure is formed by the clamping jaw assembly and the drill rod.

Description

Technical Field

[0001] The utility model relates to the technical field of mining machinery, in particular to a drill rod clamp for an exploration drill rig. Background Art

[0002] An exploration drill rig is a piece of mechanical equipment primarily used in geological exploration and mineral resource development. It drives the drill tool underground to obtain physical geological data. The design and manufacture of exploration drill rigs take into account the needs of various geological and mineral exploration activities, including but not limited to core exploration, water source exploration, and oil exploration. These drill rigs are capable of drilling samples such as cores, ore cores, and cuttings to ascertain the underground geology and mineral resources. For example, geological drill rigs are primarily used for core exploration and are suitable for vertical and inclined geological and mineral exploration holes within a 45° angle. These drill rigs typically utilize mechanical transmission, a simple structure, and are easy to maintain and operate. They also feature drill speed control and water brakes to reduce component wear and ensure safety during drilling.

[0003] As exploration depth continues to increase, drill rods are getting longer and heavier. When the drill rod needs to be lengthened or removed, it is particularly important to maintain the stability of the underground drill rod. The existing drill rod clamps have insufficient clamping force, which makes the drill rod easy to fall off during the rod replacement process, affecting the reliability and efficiency of the mechanical equipment.

[0004] Authorization Announcement Number: CN 207332790 U, Application Date: August 9, 2017. Utility Model Name: Drill Rod Clamp. This utility model provides a drill rod clamp that addresses the high cost of existing technologies. The drill rod clamp includes a frame, two clamping arms disposed in correspondence with each other, a synchronous linkage mechanism disposed between the two clamping arms, and a drive mechanism connected thereto. Each clamping arm has a chuck at one end and is hingedly connected to the frame at its midsection. The synchronous linkage mechanism includes two linkage rods connected to the ends of the clamping arms distal from the chuck, with a synchronization mechanism disposed therebetween. Advantages include: the use of a mechanical synchronization link, low cost, high reliability, easy disassembly, high accuracy of synchronous movement, and secure clamping.

[0005] Because the aforementioned prior art features fixed through-holes in the upper portion of the frame corresponding to the clamping arms' chucks, the clamping arms can only clamp drill rods of a fixed diameter. More importantly, as drilling depth increases, the drill rod within the rock formation or underground becomes increasingly heavier. When the drill rod needs to be lengthened and temporarily disconnected from the mechanical equipment's power unit, the clamping arms cannot maintain a stable grip on the drill rod, potentially causing it to slip. Utility Model Content

[0006] Aiming at the defects of the existing technology that it can only clamp drill pipes with a certain fixed diameter and cannot stably clamp drill pipes, the purpose of the present utility model is to provide a drill pipe gripper for a down-the-hole drill.

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

[0008] A drill pipe gripper for an exploration drill, comprising:

[0009] A pair of jaw assemblies for clamping drill pipes with different diameters;

[0010] A pair of guide blocks fixed to the base; the guide blocks are located outside the jaw assemblies, and the contact surfaces of the guide blocks and the jaw assemblies are inclined planes parallel to each other;

[0011] A pair of rotating swing arm assemblies symmetrically arranged and both movably connected to the base, and one end of each rotating swing arm assembly is movably connected to the jaw assembly; the rotating swing arm assemblies approach or move away synchronously;

[0012] A driving mechanism located on the side of the base, with both ends of the driving mechanism movably connected to a pair of rotating swing arm assemblies for driving the rotating swing arm assemblies to rotate synchronously and in opposite directions;

[0013] Wherein, when the rotating swing arm assemblies rotate, they drive the jaw assemblies to slide along the guide blocks, and when the jaw assemblies clamp the drill pipes, the inclined surfaces of the guide blocks provide support reaction forces for the jaw assemblies.

[0014] Further, the opposite surfaces of the guide blocks and the jaw assemblies include a first inclined plane and a second inclined plane; the first inclined plane contacts the jaw assembly; the second inclined plane is located above the first inclined plane, and relative to the central axis of the through hole, the inclination angle of the second inclined plane is greater than that of the first inclined plane; the first inclined plane and the second inclined plane are transitioned by an arc surface.

[0015] Further, the base is provided with a through hole for the drill pipe to pass through and for the jaw assemblies to move;

[0016] The guide blocks are symmetrically arranged on both sides of the through hole, and the vertical distance from the upper end of the first inclined plane to the central axis of the through hole is greater than the vertical distance from the lower end of the first inclined plane to the central axis of the through hole.

[0017] Further, the rotating swing arm assembly includes:

[0018] A main shaft passing through a fixed support and capable of rotating relative to the fixed support, and the fixed support is installed on the base;

[0019] The first swing arm, one end of which is fixedly installed on the main shaft, and the other end is movably connected to the jaw assembly;

[0020] The second swing arm, one end of which is fixedly installed on the main shaft, and the other end is movably connected to the driving mechanism; the second swing arm is located at the end of the main shaft and outside the base.

[0021] Further, the rotation planes of the first swing arm, the second swing arm and the connecting rod are parallel to each other.

[0022] Further, the jaw assembly includes a sliding member sliding along a first inclined plane and a jaw detachably connected to the sliding member; the sliding member is rotatably connected to the first swing arm; by replacing different jaws, the jaw assembly can be adapted to drill pipes with different diameters, and the adapted drill pipe diameters are 4 cm to 12 cm.

[0023] Further, a sliding surface parallel to the first inclined plane is provided on the opposite side of the sliding member and the guide block, and retaining portions are symmetrically provided on both sides of the sliding surface; the retaining portions and the sliding surface form a guide groove, and the first inclined plane is located in the guide groove;

[0024] The width of the guide groove is adapted to the width of the guide block; the retaining portion is used for sliding guidance of the sliding member.

[0025] Further, it also includes a connecting rod located on one side of the base; the connecting rod is inclined, and its two ends are respectively movably connected to the main shafts on both sides; the connecting rod is used to control the main shafts on both sides to rotate synchronously and reversely around their respective axes.

[0026] Further, the second swing arm includes a left second swing arm and a right second swing arm; the driving mechanism includes a hydraulic cylinder, the left second swing arm is movably connected to the piston rod of the hydraulic cylinder, and the right second swing arm is movably connected to the cylinder.

[0027] Further, the main shaft includes a left main shaft and a right main shaft, the left main shaft is fixedly connected to the left second swing arm, and the right main shaft is fixedly connected to the right second swing arm;

[0028] The first adapter plate is fixedly installed on the left main shaft, and the first adapter plate is located below the center line connecting the left main shaft and the right main shaft; the second adapter plate is fixedly installed on the right main shaft, and the second adapter plate is located above the center line connecting the left main shaft and the right main shaft;

[0029] The first adapter plate and the second adapter plate are located on the same side of the base and are symmetrically distributed about the center;

[0030] Both ends of the connecting rod are respectively movably connected to the first adapter plate and the second adapter plate.

[0031] Further, a plurality of weight reduction holes are provided on the base.

[0032] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects:

[0033] The present utility model provides a support reaction force for the jaw assembly through the inclined guide block. The heavier the drill pipe, the greater the support reaction force; the horizontal component force provided by the support reaction force points to the drill pipe, providing a stable clamping force for the jaw assembly, so that the jaw assembly and the drill pipe form a self-locking structure.

[0034] In addition, the jaw assembly is detachable to adapt to drill pipes of different diameters, making the drill pipe gripper have a wider range of adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of the overall structure of the drill pipe gripper in an embodiment of the present application;

[0036] Figure 2 Schematic diagram of the structure of the rotating swing arm assembly in an embodiment of the present application;

[0037] Figure 3 Schematic diagram of the bottom structure of the support in an embodiment of the present application;

[0038] Figure 4 Top view schematic diagram of the drill pipe gripper in an embodiment of the present application;

[0039] Figure 5 Schematic diagram of the position of the guide block in an embodiment of the present application;

[0040] Figure 6 Schematic diagram of the force analysis of the jaw assembly in an embodiment of the present application;

[0041] Figure 7 Schematic diagram of the overall structure of the guide block and the jaw assembly in an embodiment of the present application;

[0042] Figure 8 Schematic diagram of the overall structure of the jaw assembly in an embodiment of the present application;

[0043] Figure 9 Schematic diagram of the structure of the guide block in an embodiment of the present application;

[0044] Figure 10 Schematic diagram of the disassembled structure of the jaw assembly in an embodiment of the present application;

[0045] Description of the reference numerals in the schematic diagrams:

[0046] Spindle 11, first swing arm 12, second swing arm 13, first adapter plate 14, second adapter plate 15, left spindle 111, right spindle 112, left second swing arm 131, right second swing arm 132;

[0047] Guide block 2, first inclined plane 21, second inclined plane 22, arc surface 23;

[0048] Jaw assembly 3, slider 31, jaw 32, sliding surface 311, retaining part 312;

[0049] Connecting rod 4;

[0050] Base 5, fixed support 51, weight reduction hole 52, mounting hole 53;

[0051] Drive mechanism 6. Specific implementation mode

[0052] To further understand the content of the present invention, the present invention will be described in detail in combination with the drawings and embodiments.

[0053] 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 familiar with 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 the technical content disclosed by the present invention can cover. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like cited in this specification are only for the convenience of clear narration and are not used to limit the scope that can be implemented. The change or adjustment of their relative relationship, without substantial change of the technical content, should also be regarded as the scope that the present invention can be implemented.

[0054] During the drilling process of the exploration drill, the drill passes the torque to the drill pipe through the transmission system, and then breaks the underground rock through the drill bit. At the same time, the control system adjusts the rotation speed and drilling direction of the drill to achieve the expected drilling depth and position. During the hoisting process, the drill hoists the drill pipe to the ground through the hoisting system, and at the same time takes out the drill bit and the core sample together. This process uses the method of rotating the drill bit of the drill tower to take out the core sample. The motor provides power, and the control system controls parameters such as the rotation speed of the drill tower and the temperature of the drill bit to ensure the accuracy and efficiency of drilling.

[0055] The main components of the exploration drill include the drill body, drill tower, drill pipe, motor, control system, etc. The drill body is the support structure of the whole equipment, the power head is the power source of the drill, and the control system is the control center of the whole equipment. These components work together to enable the exploration drill to work efficiently, accurately and safely under various complex terrain and geological conditions.

[0056] When it is necessary to connect drill pipes to continue drilling, the function of the gripper is to grip the end of the drill pipe that has been drilled into the ground (the end exposed above the formation), so that the drill pipe connected to the power head is concentric and coaxial with the drill pipe gripped by the gripper; rotate the power head to achieve the threaded connection of the two drill pipes.

[0057] When the drilling is completed and the drill pipes need to be disassembled, the power head first lifts the drill pipes to expose the connection ends of adjacent drill pipes. The gripper grips a drill pipe closer to the formation below the connection end, and reverses the power head to separate the upper and lower drill pipes. Repeat this process to achieve the complete disassembly of the drill pipes.

[0058] However, currently, the prior art generally uses pneumatic spring grippers, whose disadvantages mainly include poor stability, low total output force, and high noise.

[0059] Since pneumatic tools use compressed air as the working medium and the compressibility of air is relatively high, the operating speed of the cylinder is easily affected by the change of the applied load, thus affecting the stability of position and speed control.

[0060] The pressure level of the pneumatic system is generally less than 0.8 MPa, which means that the total output force of the pneumatic spring gripper is relatively small and may not be able to meet some application scenarios that require a large clamping force.

[0061] Pneumatic tools will generate relatively high noise during operation, and generally, a muffler needs to be installed to reduce the impact of noise on the operator.

[0062] These disadvantages limit the use of pneumatic spring grippers in some applications, especially in scenarios that require precise control and a large clamping force.

[0063] Embodiment 1

[0064] A drill pipe gripper for an exploration drill rig according to the present application includes a jaw assembly 3 for gripping drill pipes of different diameters, a guide block 2, and a rotary swing arm assembly and a connecting rod 4 that are closely related to and cooperate with each other.

[0065] As Figure 2 shown, the base 5 is connected with a fixed support 51, and the fixed support 51 is provided with a through hole for the rotary swing arm assembly to pass through. Preferably, fixed supports 51 are provided at the four corners of the base 5, and the four fixed supports 51 form two groups, and each group of fixed supports 51 is movably connected to a rotary swing arm assembly.

[0066] A through hole is also provided in the middle of the base 5 for the drill pipe to move up and down. The guide blocks 2 are symmetrically arranged on both sides of the through hole, and the jaw assembly 3 can slide along the guide blocks 2. More importantly, when the jaw assembly 3 clamps the drill pipe, the inclined surface of the guide block 2 can provide a supporting reaction force for the jaw assembly 3. The heavier the drill pipe, the greater the horizontal component of this supporting reaction force, which further enhances the clamping force on the drill pipe and forms self-locking for the drill pipe. Therefore, the defect that the gripper in the prior art cannot reliably clamp the drill pipe is overcome.

[0067] More specifically, as Figure 9 shown, the surface of the guide block 2 opposite to the jaw assembly 3 includes a first inclined plane 21 and a second inclined plane 22. Among them, the second inclined plane 22 is located above the first inclined plane 22. Relative to the central axis of the through hole, the inclination angle of the second inclined plane 22 is greater than that of the first inclined plane 21, and the first inclined plane 21 and the second inclined plane 22 are transitioned by an arc surface 23. Preferably, the inclination angle of the first inclined plane 21 is 9 degrees.

[0068] The vertical distance between the upper end of the first inclined plane 21 and the central axis of the through hole is greater than the vertical distance between the lower end of the first inclined plane 21 and the central axis of the through hole, and the contact surfaces of the first inclined plane 21 and the back surface of the jaw assembly 3 are parallel inclined surfaces.

[0069] As Figure 7 、 Figure 8 shown, the jaw assembly 3 includes a sliding member 31 that slides along the first inclined plane 21 and a jaw 32 that is detachably connected to the sliding member 31. The side of the jaw 32 away from the sliding member 31 is an arc surface, which is adapted to the drill pipe. The jaw 32 is replaceable to adapt to drill pipes of different diameters, and the applicable drill pipe diameter range is 4 cm to 12 cm. The contact surface between the jaw 32 and the drill pipe is evenly distributed with raised points to increase the friction when contacting the drill pipe.

[0070] As Figure 10 shown, the sliding member 31 is provided with a sliding surface 311 parallel to the first inclined plane 21 on the side opposite to the guide block. Symmetrical retaining portions 312 are provided on both sides of the sliding surface 311. The purpose of the sliding surface 311 not contacting the second inclined plane 22 is to reduce the friction when the jaw assembly 3 slides along the guide block 2.

[0071] The retaining portion 312 and the sliding surface 311 form a guide groove. The first inclined plane 21 is located in the guide groove. The width of the guide groove is adapted to the width of the guide block 2, and the retaining portion 312 guides the sliding of the sliding member 31.

[0072] As Figure 6As shown, when the drill pipe is heavier, the drill pipe gripper of the present application can form a self-locking structure with the drill pipe, and the drill pipe will not fall off or shake violently. The specific principle is as follows: When the drill pipe gripper grips the drill pipe, the force application point on the first inclined plane 21 forms an oblique supporting reaction force F2 on the jaw assembly 3. This oblique supporting reaction force F2 is perpendicular to the first inclined plane 21 and points to the drill pipe.

[0073] F1 refers to the sum of the self-weight of the jaw assembly 3 and the self-weight of the drill pipe at the same force application point. The oblique supporting reaction force F2 is decomposed into an upward vertical decomposition force F4 and a horizontal decomposition force F3 pointing to the drill pipe. The vertical decomposition force F4 cancels out with F1, and the horizontal decomposition force F3 remains. When the drill pipe is heavier, F3 is larger, and the clamping force on the drill pipe is larger, thus forming a self-locking for the drill pipe.

[0074] The inclination angle of the first inclined plane 21 is 9 degrees, and F3 = 6.31×F4(F1), ensuring that the drill pipe is stably clamped.

[0075] Embodiment 2

[0076] The present application is a further solution based on Embodiment 1. There are a pair of rotating swing arm assemblies which are symmetrically arranged, and both ends of the driving mechanism 6 are movably connected to the pair of rotating swing arm assemblies. The rotating swing arm assembly includes a main shaft 11, a first swing arm 12 and a second swing arm 13. The main shaft 11 is passed through a set of fixed supports 51, and is preferably rotatably connected to the fixed supports 51 through bearings. One end of the second swing arm 12 is fixed to the main shaft 11, and the other end is movably connected to the jaw assembly 3. One end of the second swing arm 13 is fixed to the main shaft 11, and the other end is movably connected to the driving mechanism 6.

[0077] More specifically, as Figure 1 、 Figure 2 、 Figure 4 shown, two symmetrically arranged first swing arms 12 are fixedly connected to one main shaft 11. The jaw assembly 3 is located between the two first swing arms 12, and preferably, the two first swing arms 12 and the jaw assembly 3 are rotatably connected through a pin shaft. The second swing arm 13 is located at one end of the main shaft 11 and is also located outside the base 5. The driving mechanism 6 is preferably a hydraulic cylinder. The hydraulic cylinder is located on the side of the base 5, and the second swing arm 13 is rotatably connected to the hydraulic cylinder through a pin shaft.

[0078] More specifically, the main shaft 11 includes a left main shaft 111 and a right main shaft 112. The second swing arm 13 includes a left second swing arm 131 and a right second swing arm 132. One end of the left second swing arm 131 is fixedly connected to the left main shaft 111, and the other end is movably connected to the piston rod of the hydraulic cylinder. One end of the right second swing arm 132 is fixedly connected to the right main shaft 112, and the other end is movably connected to the cylinder.

[0079] The connecting rod 4 is inclined, and its two ends are respectively movably connected to the left main shaft 111 and the right main shaft 112. The connecting rod 4 and the main shaft 11 are movably connected through an adapter plate. The adapter plate includes a first adapter plate 14 and a second adapter plate 15, both of which are located on the same side of the base 5. Among them, the first adapter plate 14 is fixedly installed on the left main shaft 111, and the second adapter plate 15 is fixedly installed on the right main shaft 112. The preferred way of fixed installation is welding.

[0080] More importantly, the first adapter plate 14 is simultaneously located below the center line connecting the left main shaft 111 and the right main shaft 112, while the second adapter plate 15 is simultaneously located above the center line connecting the left main shaft 111 and the right main shaft 112. The first adapter plate 14 and the second adapter plate 15 are centrosymmetrically distributed. The two ends of the connecting rod 4 are respectively movably connected to the first adapter plate 14 and the second adapter plate 15. The preferred way of movable connection is through a pin shaft connection, so as to realize the rotational connection between the connecting rod 4 and the main shaft 11.

[0081] The connecting rod 4 controls the left main shaft 111 and the right main shaft 112 to rotate synchronously and reversely around their respective axes, so as to realize the synchronous approach or separation of the two rotating swing arm assemblies. The rotation planes of the first swing arm 12, the second swing arm 13 and the connecting rod 4 are all parallel to each other.

[0082] The specific principle is as follows: The hydraulic cylinder generates thrust, the piston rod extends, driving the left second swing arm 131 to rotate clockwise. The left second swing arm 131 drives the left main shaft 111 to rotate clockwise around its central axis. The clockwise rotation of the left main shaft 111 drives the connecting rod 4 to move. Due to the centrosymmetric arrangement of the first adapter plate 14 and the second adapter plate 15, during the movement of the connecting rod 4, the rotating swing arm assembly on the other side rotates synchronously counterclockwise.

[0083] During the rotation of the first swing arms 12 on both sides, the jaw assemblies 3 are driven to slide along the first inclined plane 21, so as to realize the synchronous approach of the jaw assemblies 3 on both sides to the drill pipe and clamp the drill pipe.

[0084] Similarly, when the piston rod contracts, it drives the left second swing arm 131 to rotate counterclockwise. The left second swing arm 131 drives the left main shaft 111 to rotate counterclockwise around its central axis. The counterclockwise rotation of the left main shaft 111 drives the connecting rod 4 to move, and the rotating swing arm assembly on the other side rotates synchronously clockwise, thereby releasing the clamping of the drill pipe.

[0085] As Figure 3 shown, weight-reducing holes 52 are also evenly distributed on the base 5. The weight-reducing holes 52 are preferably circular, which are used to reduce the self-weight of the gripper, improve the efficiency and safety of rod connection or disconnection. Mounting holes 53 are also provided on the base 5. The drill pipe gripper is installed on the beam of the exploration drill through the mounting holes 53. After the drill pipe gripper is installed on the beam, the jaw assembly 3 can be coaxial with the power head.

[0086] A drill pipe gripper for an exploration drill rig according to the present application, through the design of a specific inclined plane of the guide block 2, when the jaw assembly 3 used in cooperation therewith grips the drill pipe, it is subjected to the support reaction force provided by the first inclined plane 21. The heavier the drill pipe, the greater the horizontal decomposition force of the support reaction force, thereby realizing stable gripping of the drill pipe.

[0087] The above schematically describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, design similar structural manners and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A drill pipe gripper for an exploration drill rig, characterized in that: including, a pair of jaw assemblies (3) for clamping drill pipes with different diameters; a pair of guiding blocks (2) fixed to the base (5); the guiding blocks (2) are located outside the jaw assemblies (3), and the contact surfaces of the guiding blocks (2) and the jaw assemblies (3) are inclined planes parallel to each other; a pair of rotating swing arm assemblies symmetrically arranged, both are movably connected to the base (5), and one end of each rotating swing arm assembly is movably connected to the jaw assembly (3); the rotating swing arm assemblies move closer to or away from each other synchronously; a driving mechanism (6) located on the side of the base (5), with both ends of the driving mechanism (6) movably connected to a pair of rotating swing arm assemblies for driving the rotating swing arm assemblies to rotate synchronously; wherein, when the rotating swing arm assemblies rotate, they drive the jaw assemblies (3) to slide along the guiding blocks (2), and when the jaw assemblies (3) clamp the drill pipes, the inclined planes of the guiding blocks (2) provide supporting reaction forces for the jaw assemblies (3).

2. The drill pipe gripper for an exploration drill rig according to claim 1, wherein: The opposite surfaces of the guiding blocks (2) and the jaw assemblies (3) include a first inclined plane (21) and a second inclined plane (22); The first inclined plane (21) contacts the jaw assembly (3); The second inclined plane (22) is located above the first inclined plane (21), and relative to the central axis of the through hole, the inclination angle of the second inclined plane (22) is greater than that of the first inclined plane (21); The first inclined plane (21) and the second inclined plane (22) are transitioned by an arc surface (23).

3. The drill pipe gripper for an exploration drill rig according to claim 2, characterized in that: The base (5) is provided with a through hole for the drill pipe to pass through and for the movement of the jaw assembly (3) at the same time; The guiding blocks (2) are symmetrically arranged on both sides of the through hole, and the vertical distance from the upper end of the first inclined plane (21) to the central axis of the through hole is greater than the vertical distance from the lower end of the first inclined plane (21) to the central axis of the through hole.

4. The drill pipe gripper for an exploration drill rig according to claim 3, wherein: The rotating swing arm assembly includes: a main shaft (11) passing through a fixed support (51) and capable of rotating relative to the fixed support (51), and the fixed support (51) is installed on the base (5); a first swing arm (12) with one end fixedly installed on the main shaft (11) and the other end movably connected to the jaw assembly (3); a second swing arm (13) with one end fixedly installed on the main shaft (11) and the other end movably connected to the driving mechanism (6); the second swing arm (13) is located at the end of the main shaft (11) and outside the base (5).

5. The drill pipe holder for an exploration drill rig according to claim 4, characterized in that: The rotation planes of the first swing arm (12), the second swing arm (13) and the connecting rod (4) are all parallel to each other.

6. The drill pipe gripper for an exploration drill rig according to claim 5, characterized in that: The jaw assembly (3) includes a sliding member (31) sliding along the first inclined plane (21) and a jaw (32) detachably connected to the sliding member (31); The sliding member (31) is movably connected to the first swing arm (12); One side of the jaw (32) away from the sliding member (31) is an arc surface adapted to the drill pipe; the jaw (32) is used for clamping drill pipes in the range of 4 cm to 12 cm in diameter.

7. The drill pipe gripper for an exploration drill rig according to claim 6, characterized in that: On the side of the sliding member (31) opposite to the guiding block (2), there is a sliding surface (311) parallel to the first inclined plane (21), and retaining portions (312) are symmetrically arranged on both sides of the sliding surface (311); The retaining portions (312) and the sliding surface (311) form a guiding groove, and the first inclined plane (21) is located in the guiding groove; The width of the guiding groove is adapted to the width of the guiding block (2); The retaining portions (312) are used for guiding the sliding of the sliding member (31).

8. The drill pipe gripper for an exploration drill rig according to claim 4, characterized in that: It further includes a connecting rod (4) located on one side of the base (5); The connecting rod (4) is inclined, and its two ends are respectively movably connected to the main shafts (11) on both sides; The connecting rod (4) is used for controlling the main shafts (11) on both sides to rotate synchronously and reversely around their respective axes.

9. The drill pipe gripper for an exploration drill rig according to claim 8, characterized in that: The second swing arm (13) includes a left second swing arm (131) and a right second swing arm (132); The driving mechanism (6) includes a hydraulic cylinder. The left second swing arm (131) is movably connected to the piston rod of the hydraulic cylinder, and the right second swing arm (132) is movably connected to the cylinder.

10. A drill pipe gripper for an exploration drill rig according to claim 9, characterized in that: The main shaft (11) includes a left main shaft (111) and a right main shaft (112). The left main shaft (111) is fixedly connected to the left second swing arm (131), and the right main shaft (112) is fixedly connected to the right second swing arm (132); The first adapter plate (14) is fixedly installed on the left main shaft (111), and the first adapter plate (14) is located below the central connection line of the left main shaft (111) and the right main shaft (112); The second adapter plate (15) is fixedly installed on the right main shaft (112), and the second adapter plate (15) is located above the central connection line of the left main shaft (111) and the right main shaft (112); The first adapter plate (14) and the second adapter plate (15) are located on the same side of the base (5) and are symmetrically distributed about the center; The two ends of the connecting rod (4) are respectively movably connected to the first adapter plate (14) and the second adapter plate (15).

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