CN201024897Y - A kind of fast drill pipe drill bit for drilling bottom plate - Google Patents

Abstract

The utility model discloses a fast drill rod drill bit for drilling a bottom plate, and relates to a mining drill bit. It comprises a drill rod and a drill bit installed at the front end of the drill rod, and the drill rod is an air intake and dust removal drill rod; the air intake and dust removal drill rod is a hollow cylindrical shape, and has at least two air intake channels penetrating the upper and lower walls of the cylinder wall on the cylinder wall, and the bottom end of the air intake channel is connected with the inner cavity of the drill rod; the drill bit is a rock breaking filter drill bit, and is in the shape of an outward curved disc, and a plurality of rock breaking cutters are evenly distributed on the disc-shaped curved surface, and a plurality of dust removal holes distributed between the rock breaking cutters and connected with the inner cavity of the drill rod. The advantages are good rock breaking effect and rapid dust removal.

Description

A kind of fast drill pipe drill bit for drilling bottom plate

technical field

The utility model relates to a drill bit. Specifically, it is a fast drill bit used for drilling holes in roadways, tunnels, chambers and other projects.

Background technique

Underground engineering roadways, tunnels, chambers and other projects are easily deformed due to various factors such as the pressure of the upper rock and soil mass and the expansion of the surrounding rock itself during the excavation process and during the use process. Namely: roofs of roadways, tunnels, chambers, etc. sink and deform, the bottom plates bulge upwards, and the two sides move toward the center of the roadway, resulting in reduced deformation of the chambers such as roadways. In order to prevent damage caused by excessive deformation of the roadway in the excavation of underground engineering, support is usually applied in time during the excavation. The commonly used support methods include active support, passive support and combined support. Active support is considered to be a form of support that is technologically advanced and economically reasonable. Active support is to apply support materials such as anchor rods into the surrounding rock mass around the roadway, so that the anchor rods and surrounding rocks form a whole to achieve support. To apply bolts to the surrounding rock of the roadway, it is first necessary to drill holes in the surrounding rocks, and then install the bolts in the drilling holes to support the surrounding rocks. When drilling to the roof, the cuttings drilled in the drilled hole can automatically move downwards by their own weight, so they will not stay in the drilled hole to block the drill pipe. Therefore, the commonly used auger drill pipe and hexagonal drill pipe The cutting drill bit can realize the drilling of the two sides of the top plate. When drilling into the bottom plate, because the cuttings drilled in the hole run downwards by their own weight, it is difficult to effectively discharge the cuttings out of the hole, so that the cuttings stay in the hole to block the operation of the drill pipe and flow to the bottom plate. Drilling is very difficult. Commonly used auger drill pipes and hexagonal drill pipes are combined with "slotted" or "helical" cutting bits. The debris blocks drilled are large and uneven, and the drill pipe is stuck, which is difficult to be dispatched by Feng Shui. It is difficult to realize the drilling of the bottom plate, which makes the development of bottom plate drilling technology slow, and also affects the development of active support technologies such as bolting support of the bottom plate. It can be seen that at present, the floor drilling technology for underground engineering roadways, tunnels, chambers, etc. It is difficult to effectively control the phenomenon of sputum.

Contents of the invention

The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art, and provide a fast drill bit for drilling holes in the base plate, which has good rock-breaking effect and rapid dust removal.

The technical scheme of the utility model is as follows: a fast drill bit for drilling holes in the bottom plate, including a drill rod and a drill bit installed at the front end of the drill rod, the drill rod is an air intake and dust discharge drill rod; The core is cylindrical, and there are at least two air inlet channels running through the upper and lower sides of the cylinder wall. The bottom of the air inlet channels communicates with the inner cavity of the drill pipe; the drill bit is a rock-breaking filter bit, and the base body is an outwardly curved arc surface. Disc-shaped, with a number of rock-breaking cutter heads evenly distributed on the disc-shaped arc surface, and a number of dust discharge holes communicated with the inner cavity of the drill pipe distributed between the rock-breaking cutter heads.

The inner diameter of the hollow cylindrical drill rod increases gradually from bottom to top, or is straight cylindrical.

The working principle is: when drilling, the drill rig drives the drill rod and the drill bit to rotate, and the cutter on the drill bit breaks the rock into a certain particle size, and the cuttings enter the inside of the drill bit through the small hole at the front end of the drill bit, and the high-pressure air on the drill rig flows from the air inlet The air intake channel on the wall of the dust-exhausting drill pipe enters the inside of the drill bit and blows cuttings upwards. Under the combined action of high-pressure wind blowing and upward suction, the cuttings move upward along the inner cavity of the drill pipe and are discharged through the dust removal device on the drilling rig.

The beneficial effect of the utility model is that: the rock-breaking effect is good, the dust is discharged quickly, and the stick phenomenon does not occur.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.

Fig. 1 is a structural representation of the utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Figure 3 is a bottom view of the drill bit.

In the figure: 1. Drill pipe, 2. Drill bit, 3. Air inlet channel, 4. Drill pipe inner cavity, 5. Cutter head, 6. Dust discharge hole.

Detailed ways

As shown in Figure 1, the utility model is made up of drill rod 1 and the drill bit 2 that is installed in drill rod 1 front end.

As shown in Figure 1 and Figure 2, the drill pipe is an air-inlet and dust-exhausting drill pipe; the air-inlet and dust-exhaust drill pipe is a hollow cylinder, and there are two air inlet channels symmetrically arranged on the wall of the cylinder. 3. The bottom end of the air inlet duct communicates with the inner cavity 4 of the drill pipe.

As shown in Fig. 1 and Fig. 3, the drill bit is a rock-breaking filter bit, and the base body is in the shape of an outwardly curved arc surface disc, and a number of rock-breaking cutter heads 5 are evenly distributed on the disc-shaped arc surface. A number of dust discharge holes 6 communicating with the inner cavity 4 of the drill pipe are distributed among them.

In order to improve the dust removal effect, the inner diameter of the hollow cylindrical drill rod can be made into a tapered cylindrical shape gradually increasing from bottom to top.

During use, the drill bit 2 and the drill rod 1 are threaded together, then the top of the drill rod is inserted into the drilling rig, and the high-pressure air is opened and passed into the drill rod air inlet duct 3 . When drilling downwards, stand up the drilling rig, lower the drill bit, and start the drilling rig to rotate the drill pipe and open the air pressure and air suction device. With the operation of the drilling rig, the drill bit rotates, and the cutter on it breaks the cuttings and drills down the hole. After the cut cuttings are crushed to a certain particle size, the cuttings enter the inside of the drill through the dust discharge hole 6 at the front end of the drill bit, and the high-pressure air on the drilling rig enters the air intake channel on the wall of the drill pipe, enters the inside of the drill bit, and the compressed air blows upwards. Moving cuttings, cuttings are blown under the high-pressure air flow and sucked up, move upward along the inner cavity of the drill pipe, and spread with the gradually expanding inner diameter, and are discharged through the dust exhaust device on the drilling rig. As the hole depth increases, cuttings at the bottom of the hole are continuously sucked out of the hole according to the above process, so that the cuttings no longer stay between the hole wall and the drill pipe and prevent the rotation of the drill pipe, so that the drilling depth continues to increase. Meet the construction requirements.

Claims (2)

1. the quick rod bit in the twist drill hole that feels secure comprises drilling rod (1) and is installed in the drill bit (2) of drilling rod (1) front end that it is characterized in that: drilling rod is an air intake dust discharge drilling rod; Air intake dust discharge drilling rod is the hollow cylindrical shape, has to run through barrel at least two air intake ducts (3) up and down on barrel, and the bottom in air intake duct is communicated with the inner chamber of drilling rod (4); Drill bit is broken that rock filters drill bit, and matrix is outwardly-bent cambered surface disc, is evenly equipped with some broken rock cutter heads (5) on the disc cambered surface, and is distributed in brokenly the some dust exhausting holes (6) that are communicated with inner chamber drilling rod (4) between the rock cutter head.

2. the quick rod bit in a kind of twist drill hole that feels secure according to claim 1 is characterized in that, the internal diameter of described hollow cylindrical shape drilling rod is bottom-up to be increased gradually, or straight tubular.