A drill rod tripping device for rotary drilling rig down-the-hole hammer drilling process

Abstract

The application discloses a drill rod tripping device for rotary drilling rig down-the-hole hammer drilling process and relates to the technical field of rotary drilling rigs. Main structures comprise a base, sliding plates and a core supplementing device. Two sliding plates are slidably arranged on the base, and the middle parts of the two sliding plates are provided with mounting holes after being spliced. The core supplementing device is arranged in the mounting holes. The sliding plates can slide on the base and can be fixed through a pin shaft, so that the penetrating property of the driving drill rod can be ensured, and the drill tool can be hung in the holes of the core supplementing device through the core supplementing device, so that the drill rod can be conveniently connected or disassembled.

Description

Technical Field

[0001] This invention relates to the field of rotary drilling rig technology, and in particular to a drill rod lifting and lowering device for the down-the-hole hammer drilling process of a rotary drilling rig. Background Technology

[0002] Rotary drilling rigs are construction machines suitable for hole-forming operations in building foundation engineering. They are widely used in municipal construction, highway bridges, high-rise building foundation projects, and other infrastructure projects. With different drilling tools, they are suitable for dry (short auger), wet (rotary bucket), and rock (core drill) hole-forming operations. Rotary drilling rigs are characterized by high installed power, high output torque, high axial pressure, high maneuverability, high construction efficiency, and multi-functionality. Currently used drilling methods include percussion drilling, percussion gripping drilling, forward and reverse circulation drilling, percussion rotary drilling, and rotary drilling. Among these, rotary drilling is the world's most advanced technology for cast-in-place pile construction. Rotary drilling rigs are mainly suitable for construction in soil layers such as sand, cohesive soil, and silty soil. They are widely used in various foundation constructions such as cast-in-place piles, continuous walls, and foundation reinforcement. The rated power of rotary drilling rigs is generally 125-450kW, the power output torque is 120-400K·m, the maximum hole diameter can reach 1.5-4m, and the maximum hole depth is 60-90m, which can meet the requirements of various large-scale foundation constructions.

[0003] Rotary drilling rigs break up rock and soil by rotating the drill bit, loading the broken soil into the drill bit, and then using a lifting device and telescopic drill rod to pull the drill bit out of the hole to unload the soil. This process is repeated until the designed depth is reached. This method is suitable for soft strata such as soil layers, but its drilling efficiency is very low for hard strata such as bedrock. Currently, forward and reverse circulation down-the-hole hammer drilling technology is commonly used for bedrock drilling with rotary drilling rigs. This technology requires high-pressure air to be delivered to the bottom of the hole to drive the down-the-hole hammer for impact work, and the remaining high-pressure air blows the rock cuttings out of the hole. Forward and reverse circulation down-the-hole hammer drilling technology requires a separate drill rod, so a drill rod lifting and lowering device is needed to complete the lifting and lowering of the drill rod. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a drill rod lifting and lowering device for the down-the-hole hammer drilling process of rotary drilling rigs, which is used for lifting and lowering the drill rod.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a drill rod lifting and lowering device for down-the-hole hammer drilling process of rotary drilling rig, including a base, sliding plates and a core filler; two sliding plates are slidably arranged on the base, and an installation hole is provided in the middle of the two sliding plates after splicing, and the core filler is disposed in the installation hole.

[0007] Optionally, the base is provided with legs around it, which are used to keep the base level.

[0008] Optionally, the base has two proximal pin holes near the center and two distal pin holes near both ends; a through hole is provided on the side of the sliding plate away from the mounting hole; after the two sliding plates are joined together, the sliding plates are fixed to the base by inserting pins into the through holes and the proximal pin holes; after the two sliding plates are separated, the sliding plates are fixed to the base by inserting pins into the through holes and the distal pin holes.

[0009] Optionally, the core is provided with a tapered through hole in the middle, and the size of the tapered through hole matches the size of the drill rod.

[0010] Optionally, both the sliding plate and the base are made of rectangular tubing.

[0011] Optionally, the base is provided with a slide rail, and the sliding plate is slidably disposed on the slide rail.

[0012] The present invention achieves the following technical effects compared to the prior art:

[0013] The drill rod lifting and lowering device for the down-the-hole hammer drilling process of rotary drilling rigs in this invention mainly includes a base, a sliding plate, and a core filler. The sliding plate can slide on the base and can be fixed by a pin, thereby ensuring the passage of the active drill rod and suspending the drill bit in the hole of the core filler to facilitate the addition or removal of the drill rod. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the drill rod lifting and lowering device for the down-the-hole hammer drilling process of the rotary drilling rig of the present invention;

[0016] Figure 2 This is a side view of the drill rod lifting and lowering device for the down-the-hole hammer drilling process of the rotary drilling rig of the present invention;

[0017] Figure 3 This is a schematic diagram of the working state of the drill rod lifting and lowering device for the down-the-hole hammer drilling process of the rotary drilling rig of the present invention during the lifting and lowering of the drill rod;

[0018] Figure 4This is a schematic diagram of the AA cross-sectional structure of the drill rod lifting and lowering device for the down-the-hole hammer drilling process of the rotary drilling rig of the present invention;

[0019] Figure 5 This is a schematic diagram of the normal drilling working state of the drill rod lifting and lowering device for the down-the-hole hammer drilling process of the rotary drilling rig of the present invention.

[0020] Figure 6 This is a BB cross-sectional view of the drill rod lifting and lowering device for the down-the-hole hammer drilling process of the rotary drilling rig of the present invention.

[0021] Figure 7 This is a schematic diagram of the core-filling device in the drill rod lifting and lowering device for the down-the-hole hammer drilling process of the rotary drilling rig of the present invention;

[0022] Figure 8 This is a top view of the core-filling device in the drill rod lifting and lowering device for the down-the-hole hammer drilling process of the rotary drilling rig of the present invention.

[0023] Explanation of reference numerals in the attached diagram: 1. Base; 2. Sliding plate; 3. Filler core; 4. Pin; 5. Support leg; 6. Drill rod; 7. Bedrock stratum; 8. Down-the-hole hammer; 9. Rotary drilling active drill rod; 10. Limiting baffle; 11. Sliding rail. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] The drill string assembly for rotary drilling rigs using forward and reverse circulation drilling technology consists of an air intake device + a rotary active single-wall or double-wall drill rod + a double-wall or single-wall drill rod + a forward / reverse circulation down-the-hole hammer. High-pressure air is delivered to the bottom down-the-hole hammer through the air intake device and the drill rod's air intake channel. Part of the high-pressure air drives the down-the-hole hammer to break the rock and drill, while the other part blows the rock cuttings out of the hole. After the active drill rod has reached its drilling depth, additional drill rods need to be added. This requires a drill-lifting device to suspend the drill string above the borehole to add the drill rods. Similarly, when drilling is complete, the connected drill rods need to be disassembled. This also requires the drill-lifting device to suspend the drill string, allowing the drill rods to be disassembled one by one.

[0026] like Figures 1 to 8 As shown, this embodiment provides a drill rod lifting and lowering device for the down-the-hole hammer drilling process of a rotary drilling rig, including a base 1, a sliding plate 2 and a core filler 3; two sliding plates 2 are slidably arranged on the base 1, and an installation hole is provided in the middle of the two sliding plates 2 after being spliced ​​together, and the core filler 3 is disposed in the installation hole.

[0027] In this specific embodiment, the base 1 is surrounded by support legs 5, which are used to keep the base 1 horizontal. Before drilling, since the ground may be uneven, the height can be adjusted using the support legs 5 to ensure that the position of the lowered drilling device is horizontal. The support legs 5 can be disassembled. If the ground is flat, they can be removed directly, and the device can be placed at the borehole opening.

[0028] The base 1 has two proximal pin holes near its center and two distal pin holes near its ends. The sliding plate 2 has a through hole on its side away from the mounting hole. When the two sliding plates 2 are joined together, the sliding plate 2 is fixed to the base 1 by inserting a pin 4 into the through hole and the proximal pin hole. When the two sliding plates 2 are separated, the sliding plate 2 is fixed to the base 1 by inserting a pin 4 into the through hole and the distal pin hole.

[0029] The filler core 3 has a tapered through hole in its center, and the size of the tapered through hole matches the size of the drill rod 6. By replacing the filler core 3, different models of drill rod 6 can be matched.

[0030] Both the sliding plate 2 and the base 1 are made of rectangular tubing and welded together, resulting in a robust structure.

[0031] The base 1 is equipped with a slide rail, and the sliding plate 2 is slidably mounted on the slide rail. The slide rail allows for convenient and quick movement of the sliding plate 2, saving labor costs for workers.

[0032] During normal drilling, the core insert 3 is removed, and the sliding plate 2 is positioned as follows: Figure 5 and 6 As shown, the hole is secured by pin 4, allowing the drill rod 6 to pass through. Limiting baffles 10 are provided on both sides to ensure the sliding plate 2 moves within its designated range. When drilling operations are required, the sliding plate 2 is positioned as shown... Figure 3 and 4 As shown, install the filler core 3, suspend the drill bit inside the hole, and perform the addition or removal of the drill rod 6 from the top.

[0033] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A drill rod lifting and lowering device for down-the-hole hammer drilling process of rotary drilling rig, characterized in that, The system includes a base, sliding plates, and a mandrel. Two sliding plates are slidably mounted on the base. When the two sliding plates are joined, a mounting hole is provided in the middle. During drilling operations, the mandrel is placed in the mounting hole, suspending the drill bit within the mandrel's hole. During normal drilling, the sliding plates clear the opening of the borehole. Support legs are provided around the base to keep it level. The support legs are positioned on bedrock. Two proximal pin holes are provided near the center of the base, and two distal pin holes are provided near both ends of the base. A through hole is provided on the side of the sliding plate away from the mounting hole. When the two sliding plates are joined, a pin is inserted into the through hole and the proximal pin hole to fix the sliding plate to the base. When the two sliding plates are separated, a pin is inserted into the through hole and the distal pin hole to fix the sliding plate to the base.

2. The drill rod lifting and lowering device for the down-the-hole hammer drilling process of a rotary drilling rig according to claim 1, characterized in that, The core is provided with a tapered through hole in the middle, and the size of the tapered through hole matches the size of the drill rod.

3. The drill rod lifting and lowering device for down-the-hole hammer drilling process of rotary drilling rig according to claim 1, characterized in that, Both the sliding plate and the base are made of rectangular tubing.

4. The drill rod lifting and lowering device for the down-the-hole hammer drilling process of a rotary drilling rig according to claim 1, characterized in that, The base is provided with a slide rail, and the sliding plate is slidably mounted on the slide rail.

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