Drill pipe clamping anti-falling mechanism

Abstract

The utility model discloses a kind of drill pipe clamping anti-falling mechanisms, it belongs to drilling rig field, its structure is simple, drill pipe anti-falling does not need hydraulic cylinder to provide power all the time, dismounting drill pipe can be through pushing and lifting, more convenient. It mainly includes base, base is equipped with inner cylinder, inner cylinder both sides are equipped with jacking device, outer cylinder is slidably arranged at the top of inner cylinder, the lug plate of outer cylinder is connected with jacking device, three top rods are arranged in outer cylinder, the upper portion of inner cylinder is equipped with three inwardly inclined sliding grooves, clamping block is slidably arranged in sliding groove, top rod is above clamping block, spring is further arranged at the bottom of inner cylinder, and the upper end of spring is abutted below clamping block. The utility model is mainly used for drill pipe clamping anti-falling.

Description

Technical Field

[0001] This utility model relates to the field of drilling rigs, and more specifically, to a drill rod clamping and anti-fall mechanism. Background Technology

[0002] In actual operation, drill pipes sometimes experience varying degrees of pipe puncture and breakage, resulting in unstable vibrations. The intensity of these vibrations varies depending on the rock strata the drill bit is drilling into. This vibration exacerbates the inherent defects of the drill pipe, potentially leading to drill pipe falls over time. Most existing drill pipe clamping mechanisms require continuous power to maintain clamping force and prevent falls. For example, the drill pipe fall prevention device with announcement number CN205677552U has a complex structure, requires continuous power to maintain fall prevention, and necessitates a lifting device to release it, making resetting and releasing the drill pipe inconvenient. Utility Model Content

[0003] The purpose of this utility model is to provide a drill rod clamping and anti-fall mechanism with a simple structure. The drill rod anti-fall mechanism does not require the hydraulic cylinder to provide power continuously, and the drill rod can be disassembled by pushing, which is more convenient.

[0004] This utility model is achieved through the following technical solution:

[0005] A drill pipe clamping and anti-fall mechanism includes a base, an inner cylinder on the base, lifting devices on both sides of the inner cylinder, an outer cylinder slidably mounted on the top of the inner cylinder, an ear plate of the outer cylinder connected to the lifting devices, three push rods inside the outer cylinder, three inwardly inclined grooves on the upper part of the inner cylinder, clamping blocks slidably mounted in the grooves, the push rods positioned above the clamping blocks, and a spring at the bottom of the inner cylinder, the upper end of the spring abutting against the lower part of the clamping block, and the lower end of the spring abutting against the base.

[0006] Furthermore, an arc-shaped metal plate is welded to the inner side of the clamping block via a welding prism. The inner surface of the arc-shaped metal plate is provided with friction protrusions. The welding prism can increase the welding area between the clamping block and the arc-shaped metal plate, and the friction protrusions can increase the clamping friction between the clamping block and the drill rod.

[0007] Furthermore, the spring is a wave spring.

[0008] Furthermore, the outer end face of the slide groove is provided with an inwardly inclined end face I, and the outer side of the clamping block is provided with an inwardly inclined end face II. The end face I and the end face II are slidably engaged. The inner end faces of the slide groove are provided with side faces I, and the two sides of the clamping block are provided with side faces II. The side faces I and the side faces II are slidably engaged.

[0009] Furthermore, the inclination angles of both end bevel I and end bevel II are 26°.

[0010] Furthermore, the lifting device is a hydraulic cylinder, and the piston rod of the hydraulic cylinder is fixedly connected to the lug of the outer cylinder.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The outer cylinder is driven to press down by the hydraulic cylinder, and the three push rods press down the corresponding clamping blocks. The three clamping blocks sink inward at the same time to clamp the drill rod. The spring is in a compressed state. Since the drill rod is relatively heavy and the force is greater than the spring force, the hydraulic cylinder resets at this time, and the three clamping blocks will also clamp the drill rod under the action of friction, so the drill rod will not fall off.

[0013] 2. When it is necessary to disassemble the drill rod, simply push the drill rod upward from below. Under the action of the spring force, the friction protrusions of the three clamping blocks will form a gap with the drill rod. Then the clamping blocks will be lifted by the spring, and the drill rod will fall off.

[0014] 3. The structure is simple, and the drill pipe anti-fall system does not require the hydraulic cylinder to provide power continuously, making it more convenient to disassemble the drill pipe. Attached Figure Description

[0015] Figure 1 This is the front view of this utility model;

[0016] Figure 2 This is a top view of the present invention;

[0017] Figure 3 This is a partial sectional view of the present invention;

[0018] Figure 4 This is a schematic diagram of the push rod in the outer cylinder of this utility model;

[0019] Figure 5 This is a schematic diagram of the installation of the clamping block of this utility model;

[0020] Figure 6 This is a schematic diagram of the clamping block of this utility model;

[0021] Figure 7 This is a schematic diagram of the clamping block of this utility model.

[0022] In the diagram: 1. Lifting device; 2. Outer cylinder; 3. Inner cylinder; 4. Base; 5. Drill rod; 6. End bevel I; 7. Clamping block; 8. Top rod; 9. Spring; 10. End bevel II; 11. Welded prism; 12. Arc-shaped metal plate; 13. Friction protrusion; 14. Side tilt II; 15. Side bevel I. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] like Figure 1 – Figure 7As shown in Embodiment 1, a drill pipe clamping anti-fall mechanism includes a base 4, an inner cylinder 3 on the base 4, lifting devices 1 on both sides of the inner cylinder 3, an outer cylinder 2 slidably on the top of the inner cylinder 3, and ear plates of the outer cylinder 2 connected to the lifting devices 1. The outer cylinder 2 has three push rods 8 inside, and the upper part of the inner cylinder 3 has three inwardly inclined sliding grooves. Clamping blocks 7 are slidably arranged in the sliding grooves. The push rods 8 are located above the clamping blocks 7. The bottom of the inner cylinder 3 also has a spring 9, with the upper end of the spring 9 abutting below the clamping blocks 7 and the lower end of the spring 9 abutting against the base 4.

[0025] Example 2: A drill pipe clamping anti-fall mechanism, wherein an arc-shaped metal plate 12 is welded to the inner side of the clamping block 7 via a welding prism 11, and friction protrusions 13 are provided on the inner surface of the arc-shaped metal plate 12. The welding prism 11 can increase the welding area between it and the arc-shaped metal plate 12, and the friction protrusions 13 can increase the clamping friction between the clamping block 7 and the drill pipe 5; the spring 9 is a wave spring; the outer end face of the slide groove is provided with an inwardly inclined end slope I6, and the outer side of the clamping block 7 is provided with an inwardly inclined end slope I6. The inclined end face II10 is inwardly inclined, and the inclined end face I6 and the inclined end face II10 are slidably engaged. The inner two ends of the slide groove are provided with side inclined faces I15. The two sides of the clamping block 7 are provided with side inclined faces II14. The side inclined faces I15 and the side inclined faces II14 are slidably engaged, so that the clamping block 7 moves towards the center and downward. The inclination angle of the inclined end face I6 and the inclined end face II10 is 26°. The lifting device 1 is a hydraulic cylinder. The piston rod of the hydraulic cylinder is fixedly connected to the ear plate of the outer cylinder 2. The rest is the same as in embodiment 1.

[0026] The hydraulic cylinder drives the outer cylinder 2 to press down, and the three push rods 8 press down the clamping blocks 7 accordingly. The three clamping blocks 7 sink inward at the same time to clamp the drill rod 5. The spring 9 is in a compressed state. Since the drill rod 5 is relatively heavy and its force is greater than that of the spring 9, even if the hydraulic cylinder resets, the three clamping blocks 7 will still clamp the drill rod 5 under the action of friction, and the drill rod 5 will not fall off. When it is necessary to remove the drill rod 5, simply push the drill rod 5 upward from below. Under the action of the spring 9, the friction protrusions 13 of the three clamping blocks 7 form a gap with the drill rod 5. Then, the clamping blocks 7 are lifted by the spring 9, and the drill rod 5 will fall off.

Claims

1. A drill pipe clamping anti-fall mechanism, comprising a base (4), an inner cylinder (3) on the base (4), lifting devices (1) on both sides of the inner cylinder (3), an outer cylinder (2) slidably disposed on the top of the inner cylinder (3), and an ear plate of the outer cylinder (2) connected to the lifting device (1), characterized in that: The outer cylinder (2) is provided with three push rods (8), the upper part of the inner cylinder (3) is provided with three inwardly inclined sliding grooves, and a clamping block (7) is slidably provided in the sliding groove. The push rods (8) are located above the clamping block (7). The bottom of the inner cylinder (3) is also provided with a spring (9), and the upper end of the spring (9) abuts against the lower part of the clamping block (7).

2. The drill pipe clamping and anti-fall mechanism according to claim 1, characterized in that: The inner side of the clamping block (7) is welded with an arc-shaped metal plate (12) by a welding prism (11), and the inner surface of the arc-shaped metal plate (12) is provided with friction protrusions (13).

3. The drill pipe clamping and anti-fall mechanism according to claim 1, characterized in that: The spring (9) is a wave spring.

4. The drill pipe clamping and anti-fall mechanism according to claim 1, characterized in that: The outer end face of the slide groove is provided with an inwardly inclined end face I (6), and the outer side of the clamping block (7) is provided with an inwardly inclined end face II (10). The end face I (6) and the end face II (10) are slidably engaged. The inner end faces of the slide groove are provided with side faces I (15), and the two sides of the clamping block (7) are provided with side faces II (14). The side faces I (15) and the side faces II (14) are slidably engaged.

5. The drill pipe clamping and anti-fall mechanism according to claim 4, characterized in that: The inclination angles of both end bevel I (6) and end bevel II (10) are 26°.

6. The drill pipe clamping and anti-fall mechanism according to claim 1, characterized in that: The lifting device (1) is a hydraulic cylinder, and the piston rod of the hydraulic cylinder is fixedly connected to the ear plate of the outer cylinder (2).

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