Drill rod anti-falling device

Abstract

The utility model belongs to the technical field of drilling engineering, and particularly discloses a drill rod anti-falling device which comprises a lifting device, a guide seat and a clamping block, the output end of the lifting device is fixedly connected with a mounting plate, the lifting device drives the mounting plate to move up and down relative to the guide seat, a first through hole is formed in the mounting plate, and a first guide groove is formed in the guide seat. A second through hole is formed in the middle of the guide seat, a guide cylinder is inserted into the first through hole and the second through hole, the mounting plate drives the guide cylinder to move up and down, a second guide groove is formed in the side wall of the guide cylinder, the clamping block is transversely and slidably connected to the second guide groove and vertically and slidably connected to the first guide groove, and the first guide groove is obliquely formed. The first guide groove is gradually away from the guide cylinder from bottom to top, when the drill rod falls, the lifting device drives the guide cylinder to move downwards, the drill rod is clamped by the clamping block, the clamping is tighter when the drill rod falls, the drill rod can be effectively prevented from falling, manpower is saved, and the maintenance difficulty is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling engineering, and in particular relates to a drill rod anti-falling device. Background Art

[0002] In actual operation, drill pipes may sometimes be punctured and broken to varying degrees, and unstable vibrations may occur. When the drill bit is drilling different rock formations, the vibration intensity of the drill pipe will also be different. The vibration of the drill pipe itself has an aggravated negative impact on the damage defects of the drill pipe itself, which will cause drill pipe drop accidents over the years. When the drilling depth is too deep, the stress level of the drill pipe will increase, resulting in abnormal aging of the drill pipe, which will cause the drill pipe to fall. After the fall, the maintenance cost will be greatly increased, affecting the drilling progress. In the prior art, a chuck-type fixation is usually adopted, such as the Chinese utility model patent with patent announcement number CN205677552U, which provides a special card for preventing the drill pipe from falling off the drilling rig. It is easy to not clamp tightly, the load is large during disassembly, and it is more labor-intensive to disassemble and maintain the drill pipe. Utility Model Content

[0003] In view of the problems in the prior art that the drill rod anti-falling performance needs to be improved, the device is easy to be loose, the load is large during the disassembly process, the disassembly and maintenance of the drill rod is relatively labor-intensive, and the efficiency needs to be improved, a drill rod anti-falling device is now proposed. The utility model provides the following technical solutions:

[0004] A drill rod anti-falling device comprises a lifting device, a guide seat and a clamping block for clamping the drill rod, the output end of the lifting device is fixedly connected to a mounting plate, the lifting device drives the mounting plate to move up and down relative to the guide seat, a first through hole is arranged on the mounting plate, a first guide groove is arranged on the guide seat, a second through hole is arranged in the middle of the guide seat, a guide cylinder is inserted in the first through hole and the second through hole, the mounting plate drives the guide cylinder to move up and down, a second guide groove is arranged on the side wall of the guide cylinder, the clamping block is laterally slidably connected to the second guide groove, and is vertically slidably connected to the first guide groove, the first guide groove is inclined, and the first guide groove gradually moves away from the guide cylinder from bottom to top.

[0005] Preferably, the first guide groove is a T-shaped groove.

[0006] Preferably, the inner side of the clamping block is curved in an arc shape.

[0007] Preferably, a clamping pad is fixedly connected to the inner side of the clamping block.

[0008] Preferably, the outer side of the clamping pad is provided with wave-shaped or tooth-shaped protrusions.

[0009] Preferably, the bottom end of the guide cylinder is radially extended to form a chuck, and the outer diameter of the chuck is larger than the inner diameter of the first through hole.

[0010] Preferably, a limiting block is fixedly connected to the bottom of the guide cylinder, the limiting blocks are arranged at intervals on the upper side of the chuck, and the outer diameter of the limiting block is larger than the inner diameter of the first through hole.

[0011] Preferably, the lifting device is a hydraulic cylinder.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. When the drill rod falls, the guide cylinder can be driven downward by the lifting device, which will cause the clamping block to move obliquely downward along the first guide groove and move toward the drill rod along the second guide groove, thereby clamping the drill rod to prevent it from falling, and the clamping block can be actively driven by the lifting device to clamp or loosen;

[0014] 2. The first guide groove is a T-shaped groove, and the clamping block is also T-shaped. After matching, it can prevent the clamping block from completely moving radially into the guide cylinder, thereby improving stability and reliability;

[0015] 3. The inner side of the clamping block is curved in an arc shape, which can increase the contact area with the drill rod and improve the anti-fall effect. A clamping pad is fixedly connected to the inner side of the clamping block; the outer side of the clamping pad is provided with a wavy or toothed protrusion, which can improve the wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0017] Figure 2 It is a partial three-dimensional structural schematic diagram of the utility model;

[0018] In the attached drawings, 1, lifting device; 2, mounting plate; 3, guide seat; 31, first guide groove; 4, clamping block; 5, guide cylinder; 51, second guide groove; 52, limit block; 53, chuck; 6, drill rod; 7, clamping pad; 8, shell. DETAILED DESCRIPTION

[0019] The directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the invention of the utility model.

[0020] Example 1

[0021] like Figure 1-2As shown, a drill rod anti-falling device comprises a lifting device 1, a guide seat 3 and a clamping block 4 for clamping a drill rod 6, the output end of the lifting device 1 is fixedly connected to a mounting plate 2, the lifting device 1 drives the mounting plate 2 to move up and down relative to the guide seat 3, a first through hole is provided on the mounting plate 2, a first guide groove 31 is provided on the guide seat 3, a second through hole is provided in the middle of the guide seat 3, a guide cylinder 5 is inserted in the first through hole and the second through hole, the mounting plate 2 drives the guide cylinder 5 to move up and down, a second guide groove 51 is provided on the side wall of the guide cylinder 5, the clamping block 4 is slidably connected to the second guide groove 51 laterally, and is slidably connected to the second guide groove 51 vertically. It is connected to the first guide groove 31, which is inclined and gradually moves away from the guide cylinder 5 from bottom to top, and can clamp the drill rod 6 through the clamping block 4; when the drill rod 6 falls, the guide cylinder 5 can be driven downward by the lifting device, so that the clamping block 4 can move obliquely downward along the first guide groove 31, and at the same time move toward the drill rod 6 along the second guide groove 51, thereby clamping the drill rod 6, and under the action of friction, the more it falls, the more it drives the clamping block 4 to move downward, and the clamping is tighter, which can effectively prevent it from falling, and the clamping block 4 can be actively driven to clamp or loosen through the lifting device 1, saving manpower and reducing the difficulty of maintenance.

[0022] Specifically, Figure 2 As shown, the first guide groove 31 is a T-shaped groove, and the clamping block 4 is also T-shaped. After cooperation, the clamping block 4 can be prevented from completely radially moving into the guide cylinder 5. Preferably, four first guide grooves 31, second guide grooves 51 and clamping blocks 4 are provided to improve stability and reliability.

[0023] Preferably, the inner side of the clamping block 4 is curved in an arc shape, which can increase the contact area with the drill rod 6 and improve the anti-falling effect.

[0024] Preferably, a clamping pad 7 is fixedly connected to the inner side of the clamping block 4; and a wave-shaped or tooth-shaped protrusion is arranged on the outer side of the clamping pad 7 to improve the wear resistance.

[0025] Preferably, the lifting device 1 is a hydraulic cylinder, and 2-4 of them are symmetrically arranged on the left and right to improve stability; the guide seat 3 is fixedly connected to the frame through the shell 8, and the hydraulic cylinder base is also fixedly connected to the frame.

[0026] Preferably, the bottom end of the guide cylinder 5 is radially extended to form a chuck 53, the outer diameter of the chuck 53 is larger than the inner diameter of the first through hole, which can limit the upward movement of the guide cylinder 5, and facilitate the active driving of the clamping block 4 to move relative to the first guide groove 31 by the lifting device 1. The bottom of the guide cylinder 5 is fixedly connected to the limit block 52, and the limit block 52 is arranged at intervals on the upper side of the chuck 53. The outer diameter of the limit block 52 is larger than the inner diameter of the first through hole, and the chuck is provided with a slot for the limit block 52 to pass vertically. When installing, the guide cylinder 5 is first passed through the mounting plate 2 from bottom to top, and then the guide cylinder 5 is rotated so that the limit block 52 can limit the mounting plate, and then the guide seat 3 is inserted. The gap between the limit block 52 and the chuck 53 can be used to expose the second guide groove 51. After the second guide groove 51 is exposed, the clamping block 4 is inserted into the second guide groove 51, and then the lower end of the clamping block 4 is aligned and inserted into the first guide groove 31.

[0027] Example 2

[0028] The difference from Example 1 is that the limit block 52 is in a circular shape and is threadedly connected to the outside of the guide cylinder 5. During installation, the limit block 52 is first placed between the mounting plate 2 and the guide seat 3, and then the guide cylinder 5 is passed through the mounting plate 2, the limit block 52 and the guide seat 3, and then the limit block 52 is screwed to achieve limiting.

[0029] Example 3

[0030] The difference from the first and second embodiments is that there is no limit block 52, and the device is directly fixed to the mounting plate 2 by means of a chuck 53 and bolts.

Claims

1. A drill rod anti-fall device, characterized in that: The invention comprises a lifting device (1), a guide seat (3) and a clamping block (4) for clamping a drill rod (6); the output end of the lifting device (1) is fixedly connected to a mounting plate (2); the lifting device (1) drives the mounting plate (2) to move up and down relative to the guide seat (3); a first through hole is provided on the mounting plate (2); a first guide groove (31) is provided on the guide seat (3); a second through hole is provided in the middle of the guide seat (3); guide cylinders (5) are inserted into the first through hole and the second through hole; the mounting plate (2) drives the guide cylinder (5) to move up and down; a second guide groove (51) is provided on a side wall of the guide cylinder (5); the clamping block (4) is slidably connected to the second guide groove (51) in a transverse direction and slidably connected to the first guide groove (31) in a vertical direction; the first guide groove (31) is arranged obliquely and the first guide groove (31) gradually moves away from the guide cylinder (5) from bottom to top.

2. The drill rod anti-fall device according to claim 1, characterized in that: The first guide groove (31) is a T-shaped groove.

3. The drill rod anti-fall device according to claim 1, characterized in that: The inner side of the clamping block (4) is curved in an arc shape.

4. The drill rod anti-fall device according to claim 3, characterized in that: A clamping pad (7) is fixedly connected to the inner side of the clamping block (4).

5. The drill rod anti-fall device according to claim 4, characterized in that: The outer side of the clamping pad (7) is provided with a wave-shaped or tooth-shaped protrusion.

6. The drill rod anti-fall device according to claim 1, characterized in that: The bottom end of the guide cylinder (5) is radially extended to form a chuck (53), and the outer diameter of the chuck (53) is greater than the inner diameter of the first through hole.

7. The drill rod anti-fall device according to claim 1, characterized in that: The bottom of the guide cylinder (5) is fixedly connected to a limit block (52), the limit block (52) is arranged at intervals on the upper side of the chuck (53), and the outer diameter of the limit block (52) is greater than the inner diameter of the first through hole.

8. The drill rod anti-fall device according to claim 1, characterized in that: The lifting device is a hydraulic cylinder.

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