Combined whole set of down-the-hole drill auxiliary tool

Abstract

The application discloses a combined type down-the-hole drill whole set auxiliary tool, which uses the upper surface of a support seat as a support platform for placing and assembling multiple down-the-hole drill bits, vertically connects positioning columns on the upper surface of the support seat, and makes the positioning columns be distributed according to the down-the-hole drill bits on the combined type down-the-hole drill.

Description

Technical Field

[0001] This invention belongs to the technical field of rotary drilling devices, specifically relating to a combined down-the-hole drill assembly. Background Technology

[0002] A down-the-hole (DH) hammer is a widely used drilling device in drilling engineering, especially when drilling deep holes or working in hard rock conditions. The DH hammer converts compressed air or hydraulic energy into impact energy, which is directly applied to the drill bit to break the rock. Large DH hammers, also called modular DH drills, typically consist of multiple parallel, spaced DH bits. During drilling, the DH hammer breaks the rock strata through the spring teeth or ball teeth on the end face of the DH bit, and the drill cuttings are discharged through the chip removal hole at the center of the end face and the internal chip removal channel. Due to the large size and weight of modular DH drills, for ease of transportation, the individual DH bits are usually transported separately and then assembled on-site. Currently, most DH bits are placed upright on the ground in their combined configuration and then assembled using relevant components. However, this assembly process is difficult because it is challenging to accurately distribute the DH bits as required, and the bits are prone to accidental movement or even tipping over during assembly, making assembly difficult and potentially affecting the drilling progress. Therefore, it is necessary to design an auxiliary tool that facilitates on-site assembly of down-the-hole hammer drill bits in order to reduce assembly difficulty and increase drilling speed. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of this invention is to provide a modular down-the-hole drill assembly tool to solve the technical problem of the high difficulty of on-site assembly of modular down-the-hole drills, thereby reducing assembly difficulty and increasing drilling speed.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A modular down-the-hole drill assembly includes a plate-shaped support base. Multiple positioning pins are vertically connected to the upper surface of the support base. The distribution of the multiple positioning pins corresponds to the distribution of multiple down-the-hole drill bits on the modular down-the-hole drill. The diameter of the positioning pins matches the diameter of the chip removal holes on the down-the-hole drill bits.

[0005] Furthermore, the support base includes a rectangular outer frame, with multiple support rods spaced apart along the width direction on the inner side of the outer frame. The support rods extend along the length direction of the outer frame and are connected to the outer frame at both ends. A reinforcing rod is vertically connected between two adjacent support rods.

[0006] Furthermore, the upper end of the positioning post is tapered, and its diameter decreases from bottom to top.

[0007] Furthermore, the support base is provided with a support plate corresponding to a plurality of positioning posts, and the positioning posts pass vertically through the center of the support plate and are rotatably connected.

[0008] Furthermore, a pad and a bearing are arranged sequentially from bottom to top between the support plate and the support base. The pad is fixedly installed on the support base, the positioning post is vertically connected to the pad, the bearing is sleeved on the positioning post, the lower end of the outer ring of the bearing abuts against the pad, and the upper end of the inner ring of the bearing abuts against the lower surface of the support plate.

[0009] Furthermore, the combined down-the-hole drill assembly also includes a drill base, which includes two parallel main rods facing each other. Multiple auxiliary rods are vertically connected between the main rods. An inclined reinforcing rod is connected between the outermost auxiliary rod and the two main rods. A U-shaped clearance notch for drilling is formed between the two inclined reinforcing rods and a portion of the main rod. The section of the main rod forming the U-shaped clearance notch protrudes inward to form a support. The support seat is located inside the U-shaped clearance notch, and the two ends of the support seat abut against the support portions on both sides.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. The modular down-the-hole drill assembly tool of the present invention only requires placing each down-the-hole drill bit vertically on the support base and inserting the positioning pins one-to-one into the chip removal holes on the end face of each down-the-hole drill bit. This not only arranges the down-the-hole drill bits in a ready-to-assemble state, but also restricts the down-the-hole drill bits, preventing them from accidentally moving or tipping over during assembly. This helps reduce assembly difficulty and effectively solves the problem of the high difficulty of on-site assembly of modular down-the-hole drills, thereby improving drilling speed.

[0011] 2. The combined down-the-hole drill assembly tool of the present invention has a tapered positioning post with a smaller diameter at the upper end than the chip removal hole, and the tapered surface has a guiding function, which facilitates the adjustment of the down-the-hole drill bit position so that the positioning post can be inserted into the chip removal hole, making the operation of positioning and placing the down-the-hole drill bit before assembly simpler and faster; the support plate rotatably connected to the positioning post replaces the support seat of the frame structure to abut and support the down-the-hole drill bit, which not only makes the down-the-hole drill bit more stable, but also helps to reduce the resistance of rotating and adjusting the attitude of the down-the-hole drill bit during assembly, making the assembly operation simpler and easier.

[0012] 3. When assembling the combined down-the-hole drill assembly tool of the present invention on site, the support base is placed inside the U-shaped clearance notch, and the two ends of the support base abut against the support parts on both sides respectively. This allows the assembled combined down-the-hole drill to be connected to the drilling rig without moving, which helps to reduce the difficulty of use. After being connected to the drilling rig, the combined down-the-hole drill can be lifted by the drilling rig, and then the support base can be removed to carry out drilling construction, which helps to improve construction efficiency. Attached Figure Description

[0013] Figure 1 This is a perspective view of the combined down-the-hole drill assembly described in the embodiment; Figure 2 This is a front view of the combined down-the-hole drill assembly described in the embodiment; Figure 3 This is a bottom view of the combined down-the-hole drill assembly described in the embodiment; Figure 4 This is a perspective view of the drilling rig base described in the embodiment; Figure 5 This is a schematic diagram illustrating the use of the combined down-the-hole drill assembly and drilling rig base as described in the embodiment. The components include: positioning post 1, outer frame 2, support rod 3, reinforcing rod 4, diagonal support rod 5, support plate 6, pad block 7, bearing 8, shaft shoulder 9, flat part 10, main rod 11, auxiliary rod 12, diagonal reinforcing rod 13, U-shaped clearance notch 14, support part 15, and clearance opening 16. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0015] Example: Please see Figure 1 A modular down-the-hole drill assembly includes a plate-shaped support base. Multiple positioning posts 1 are vertically connected to the upper surface of the support base. The distribution of the multiple positioning posts 1 corresponds to the distribution of multiple down-the-hole drill bits on the modular down-the-hole drill. The diameter of the positioning posts 1 matches the diameter of the chip removal holes on the down-the-hole drill bits.

[0016] The modular down-the-hole drill assembly tool of this invention uses the upper surface of the support base as a support platform for placing and assembling multiple down-the-hole drill bits. Positioning posts 1 are vertically connected to the upper surface of the support base, and the positioning posts 1 are distributed according to the down-the-hole drill bits on the modular down-the-hole drill. In use, each down-the-hole drill bit is simply placed vertically on the support base, and the positioning posts 1 are inserted one-to-one into the chip removal holes on the end face of each down-the-hole drill bit. This not only arranges the down-the-hole drill bits in a ready-to-assemble state but also restricts their movement, preventing accidental movement or tipping during assembly. This reduces assembly difficulty and effectively solves the problem of high on-site assembly difficulty for modular down-the-hole drills, thereby increasing drilling speed.

[0017] Please see Figure 1 and Figure 3The support base includes a rectangular outer frame 2. Multiple support rods 3 are spaced apart along the width direction on the inner side of the outer frame 2. The support rods 3 extend along the length direction of the outer frame 2 and are connected to the outer frame 2 at both ends. A reinforcing rod is vertically connected between two adjacent support rods 3. In this embodiment, a diagonal support rod 5 is also connected between the support rod 3 and the outer frame 2. In this way, the support base adopts a frame structure, which helps to reduce weight while ensuring structural strength, and facilitates transportation and use.

[0018] Please see Figure 1 and Figure 2 The upper end of the positioning post 1 is tapered and the diameter decreases from bottom to top. In this way, when the down-the-hole drill bit is placed on the support, the upper end of the tapered positioning post 1 is smaller than the diameter of the chip removal hole and the tapered surface has a guiding effect, which makes it easier to adjust the position of the down-the-hole drill bit so that the positioning post 1 can be inserted into the chip removal hole, making the operation of positioning and placing the down-the-hole drill bit before assembly simpler and faster.

[0019] Please see Figure 1 and Figure 2 The support base is equipped with a support plate 6 that corresponds one-to-one with multiple positioning posts 1. The positioning posts 1 pass vertically through the center of the support plate 6 and are rotatably connected. In this way, the support plate 6 replaces the support base of the frame structure to support the down-the-hole drill bit, making the down-the-hole drill bit more stable. The rotatable connection between the support plate 6 and the positioning posts 1 helps to reduce the resistance to rotating and adjusting the attitude of the down-the-hole drill bit during assembly, making the assembly operation simpler and easier.

[0020] To ensure more stable and reliable rotation of the support plate 6, a pad 7 and a bearing 8 are arranged sequentially from bottom to top between the support plate 6 and the support base. The pad 7 is fixedly mounted on the support base. The positioning pin 1 is vertically connected to the pad 7 and moves through the support plate 6. The bearing 8 is sleeved on the positioning pin 1. The lower end of the outer ring of the bearing 8 abuts against the pad 7, and the upper end of the inner ring of the bearing 8 abuts against the lower surface of the support plate 6. In this embodiment, the positioning pin 1 also has a shoulder 9 protruding above the support plate 6 to prevent the support plate 6 from detaching from the support base. In addition, the lower end of the positioning pin 1 is threaded to the pad plate, and a flat portion 10 is machined between the shoulder 9 and the upper end of the positioning pin 1 to allow the positioning pin 1 to be unscrewed and the support plate 6 and positioning pin 1 to be replaced with a suitable one according to the combined down-the-hole drill to be assembled.

[0021] Please see Figure 4 and Figure 5To facilitate the use of the combined down-the-hole drill assembly with the drilling rig, the drilling rig base is designed to include two parallel main rods 11 facing each other. Multiple auxiliary rods 12 are vertically connected between the main rods 11. An inclined reinforcing rod 13 connects the outermost auxiliary rod 12 to each of the two main rods 11. A U-shaped clearance notch 14 for drilling is formed between the two inclined reinforcing rods 13 and a portion of the main rod 11. A section of the main rod 11 forming the U-shaped clearance notch 14 protrudes inward to form a support portion 15. During on-site assembly, the support is placed inside the U-shaped clearance notch 14, with both ends of the support abutting against the support portions 15 on both sides. This allows the assembled combined down-the-hole drill to be connected to the drilling rig without moving, reducing the difficulty of use. After connection to the drilling rig, the combined down-the-hole drill is lifted by the drilling rig, and then the support is removed for drilling operations, improving construction efficiency.

[0022] Please see Figure 3 In this embodiment, the outer frame 2 is composed of multiple square tubes connected end to end in sequence. One long side of the outer frame 2 is composed of two square tubes, and there is a gap between the opposite ends of the two square tubes. A reinforcing rod is connected between the opposite ends and the adjacent support rod 3 to form a clearance opening 16 to avoid the drilling rig related components when used with the drilling rig base.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A modular down-the-hole drill assembly, characterized in that: It includes a plate-shaped support base, on the upper surface of which multiple positioning posts are vertically connected. The distribution of the multiple positioning posts corresponds to the distribution of multiple down-the-hole drill bits on the combined down-the-hole drill. The diameter of the positioning posts matches the diameter of the chip removal holes on the down-the-hole drill bits.

2. The combined down-the-hole drill assembly according to claim 1, characterized in that: The support base includes a rectangular outer frame, with multiple support rods spaced apart along the width direction on the inner side of the outer frame. The support rods extend along the length direction of the outer frame and are connected to the outer frame at both ends. A reinforcing rod is vertically connected between two adjacent support rods.

3. The combined down-the-hole drill assembly according to claim 1, characterized in that: The upper end of the positioning post is tapered and the diameter decreases from bottom to top.

4. The combined down-the-hole drill assembly according to claim 1, characterized in that: The support base is equipped with a support plate that corresponds to multiple positioning posts. The positioning posts pass vertically through the center of the support plate and are rotatably connected.

5. The combined down-the-hole drill assembly according to claim 4, characterized in that: A pad and a bearing are arranged sequentially from bottom to top between the support plate and the support base. The pad is fixedly set on the support base, the positioning post is vertically connected to the pad, and the bearing is sleeved on the positioning post. The lower end of the outer ring of the bearing abuts against the pad, and the upper end of the inner ring of the bearing abuts against the lower surface of the support plate.

6. The combined down-the-hole drill assembly according to claim 1, characterized in that: It also includes a drilling rig base, which includes two parallel main rods facing each other. Multiple auxiliary rods are vertically connected between the main rods. The outermost auxiliary rod is connected to the two main rods by inclined reinforcing rods. The two inclined reinforcing rods and a portion of the main rods form a U-shaped clearance notch for drilling operations. The section of the main rod that forms the U-shaped clearance notch protrudes inward to form a support. The support seat is located inside the U-shaped clearance notch, and the two ends of the support seat abut against the support portions on both sides.

Images