Drilling and washing equipment

Abstract

The utility model is a drilling and hole washing device, which solves the problem of water leakage again when the face is excavated after the traditional tunnel water plugging and grouting is completed. The drill bit and the drill rod are coaxial and same-diameter hollow cylinders, with matching connecting threads at the ends, the front end face of the drill bit is a conical surface, the rear end of the drill bit is threadedly connected to the first drill rod, the center of the front end face of the drill bit has a drill bit water outlet hole connected to the peripheral wall of the drill bit through 5 straight grooves, the angles of adjacent straight grooves are equal, there is a drill bit water outlet hole between adjacent straight grooves, the side wall of the drill bit has a drill bit water outlet hole, and the wall of the first drill rod has two rows of drill rod water outlet holes with equal hole spacing that are horizontally symmetrical and vertically symmetrical, and the horizontal drill rod water outlet hole is located at the midpoint of the projection of the axial connection line of the two adjacent vertical drill rod water outlet holes.

Description

Technical Field

[0001] The utility model relates to a tunnel water blocking and grouting construction device. Background Art

[0002] During traditional tunnel water plugging grouting construction, after the grouting holes are drilled, cement grouting is carried out without further processing the surrounding rock grouting holes. When the surrounding rock is extremely broken, mostly gravel mixed with mud, and rich in water, direct grouting may cause the cement slurry to be difficult to bond with the gravel, resulting in water leakage again when the heading face is excavated after the grouting is completed. Summary of the invention

[0003] The utility model aims to provide a drilling hole washing device which is easy to process, manufacture and install, and is convenient for operators to flush the hole, bring clay in the loose gravel body out of the hole, ensure the bonding of cement slurry and gravel during subsequent grouting, and has a water leakage prevention effect.

[0004] The utility model is achieved in this way:

[0005] The drilling and hole washing equipment is composed of a plurality of drill rods 4 with water outlets and a drill bit 1 with water outlets connected end to end. The drill bit 1 and the drill rod 4 are coaxial and same-diameter hollow cylinders with matching connecting threads 3 at the ends. The front end face of the drill bit 1 is a conical surface. The rear end of the drill bit 1 is threadedly connected to the first drill rod. A drill bit water outlet 2 is provided at the center of the front end face of the drill bit 1. The center drill bit water outlet 2 is connected to the peripheral wall of the drill bit through a plurality of straight grooves 6. The included angles of adjacent straight grooves are equal. There is a drill bit water outlet hole between adjacent straight grooves. The side wall of the drill bit 1 is provided with a drill bit water outlet hole 2. The wall of the first drill rod is provided with two rows of drill rod water outlet holes 5 with equal hole spacing, which are horizontally symmetrical and vertically symmetrical. The horizontal drill rod water outlet hole is located at the midpoint of the projection of the axial connection line of the two adjacent vertical drill rod water outlet holes.

[0006] The utility model can drill holes in the surrounding rock of the face and clean the surrounding rock in the hole. The drill rod is used as a transmission rod and the hole is cleaned at the same time, which increases the hole cleaning range while not reducing the hole cleaning water pressure and wind pressure.

[0007] Beneficial effects of the utility model

[0008] Compared with the traditional construction method, the utility model is easy to manufacture, process and install, simple to operate, highly efficient and reliable, safe and civilized, and standardized. It not only greatly speeds up the construction efficiency of drilling and washing holes, but also avoids the re-leakage phenomenon when excavating the face. It improves safety, speeds up work efficiency, achieves the purpose of anti-leakage of water plugging and grouting, and ensures the safety of the tunnel excavation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a utility model structural diagram.

[0010] Figure 2 This is the structural diagram of the first drill pipe.

[0011] Figure 3 This is a diagram of the drill bit structure.

[0012] Figure 4 for Figure 3 Right view of .

[0013] Figure 5 for Figure 3 Left view of .

[0014] The symbols in the figure represent:

[0015] 1. Drill bit; 2. Drill bit water outlet hole; 3. Threaded connection; 4. Drill rod; 5. Drill rod water outlet hole; 6. Straight groove. DETAILED DESCRIPTION

[0016] The drilling and hole washing equipment is composed of a plurality of drill rods 4 with water outlets and a drill bit 1 with water outlets connected end to end. The drill bit 1 and the drill rod 4 are coaxial and same-diameter hollow cylinders with matching connecting threads 3 at the ends. The front end face of the drill bit 1 is a conical surface. The rear end of the drill bit 1 is threadedly connected to the first drill rod. A drill bit water outlet 2 is provided at the center of the front end face of the drill bit 1. The center drill bit water outlet 2 is connected to the peripheral wall of the drill bit through five straight grooves 6. The included angles of adjacent straight grooves are equal. There is a drill bit water outlet hole between adjacent straight grooves. The side wall of the drill bit 1 is provided with a drill bit water outlet hole 2. The wall of the first drill rod is provided with two rows of drill rod water outlet holes 5 with equal hole spacing, which are horizontally symmetrical and vertically symmetrical. The horizontal drill rod water outlet hole is located at the midpoint of the projection of the axial connection line of the two adjacent vertical drill rod water outlet holes.

[0017] The drill bit 1 is used for drilling grouting holes in surrounding rocks; the drill bit water outlet hole 2 is used for flushing the hole after the drill bit 1 has completed drilling; the thread 3 is used for connecting the drill bit 1 with the drill rod 4; the drill rod 4 is used for transmitting force during drilling; the drill rod water outlet hole 5 is used for assisting flushing the hole and increasing the flushing range.

[0018] In this example, drill bit 1 is used to drill grouting holes in the surrounding rock. After the drilling is completed, high-pressure wind water is injected at the tail of the drill pipe to flush the surrounding rock in the hole through the drill bit water outlet hole 1 and the drill pipe water outlet hole 5. The drill pipe 4 not only transmits force but also assists in hole flushing, thereby ensuring the efficiency of drilling and hole flushing, reducing capital and time consumption, and also ensuring construction safety and progress.

Claims

1. Drilling and washing equipment, characterized in that: The drill bit (1) is composed of a plurality of drill rods (4) with water outlet holes and a drill bit (1) with water outlet holes connected end to end. The drill bit and the drill rod are coaxial and co-diameter hollow cylinders, and the ends are provided with matching connecting threads (3). The front end surface of the drill bit is a conical surface, and the rear end of the drill bit is threadedly connected to the first drill rod. The center of the front end surface of the drill bit is provided with a first drill bit water outlet hole, and the first drill bit water outlet hole is connected to the peripheral wall of the drill bit through a plurality of straight grooves (6). The included angles of adjacent straight grooves are equal, and there is a drill bit water outlet hole between adjacent straight grooves. The side wall of the drill bit is provided with a drill bit water outlet hole (2), and the wall of the first drill rod is provided with two rows of drill rod water outlet holes (5) with equal hole spacing in horizontal and vertical symmetry, and the horizontal drill rod water outlet hole is located at the midpoint of the projection of the axial connection line of the two adjacent vertical drill rod water outlet holes.

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