KR19990037886A - A bace rock digging vit - Google Patents

Abstract

The present invention relates to a rock excavation bit installed at the end of an excavator that drills the ground during tunnel construction or building foundation work to excavate a rock that appears during the excavation construction. High-quality, high-quality rock bit to maximize the discharge efficiency of rock crushed material by maximizing the discharge efficiency of the discharge pipe formed in the drum as well as facilitating the discharge of the rock crushed material more easily by gathering in the inside without being scattered. The purpose is to provide.

The present invention for achieving the above object in configuring the rock drilling bit,

An intermediate shredding roller and a pair of central shredding rollers installed in a cross shape and one outer shredding roller of three outer shredding rollers are installed in a straight line on the bottom of the disc constituting the drum, and the remaining outer shredding rollers are angle-divided. After the external shredding roller is installed in the space between the central shredding roller and the intermediate shredding roller of the side coupled in a straight line to form a suction hole communicating with the discharge pipe, wherein the pair of central shredding roller in a line The outer shredding roller to be installed is such that the central shredding roller and one outer shredding roller of one side are axially coupled to each bearing by which two shaft coupling parts are integrally formed so as to be in a straight line.

In addition, the present invention is formed by forming a thick circular cylindrical top head to the outer circumferential side of the disk constituting the drum to narrow the inner space in which the crushing roller group is installed to increase the suction power to suck the rock crushed powder as well as crushing Between the roller group and the circular wheel, the rock fracture is prevented from being caught, or the blade is inclined in the same direction as the drum's rotational direction to the lower side of the outer circumference of the disk constituting the drum. It is configured to increase the suction power to suck up the rock crushed powder by allowing the water to easily collect into the drum through the upper ring wheel and the abrasion resistance is strong on both sides of the wheel and the blade formed on the outer peripheral side of the disk constituting the drum Fix the wear prevention tip with the fixing bolt, but combine the rear end with the adjusting bolt to adjust the adjusting bolt. Ever it can be configured to adjust the discharge length of the wear resistant tip.

In addition, the present invention forms a gentle outward expansion portion in the lower side of the draft tube constituting the drum and form an air injection hole vertically upwardly penetrating from the bottom of the outward expansion portion to the inside, or the inclined bent formed below the draft tube The air injection hole vertically penetrated upward from the load side was formed to eliminate the phenomenon that the air pressure hits the inner wall surface of the discharge pipe during the injection of air, thereby increasing the discharge efficiency of the rock crushed powder.

On the other hand, the present invention may be installed so that the pair of central shredding rollers installed in the center of the bottom of the drum to be concave inward, so that the outer diameter is larger inward.

Description

Rock Drilling Bits {A BACE ROCK DIGGING VIT}

The present invention relates to a rock drilling bit is installed at the end of the excavator drilling the ground during the tunnel construction or building foundation work to excavate the rock that appears during the excavation.

In general, in the excavation of rock, it is connected with external power and rotates, and a bit formed by a drum having a plurality of shredding rollers embedded with cemented carbide tips or diamonds in the circumferential direction at the end of the hollow shaft to be connected and used for a long time according to the excavation depth. Using a rock excavator equipped with a bar, which rotates the hollow shaft of the rock excavator with an external force, the crushing roller of the bit installed on the end of the hollow shaft is in close contact with the rock and rotated, the crushed rock crushed powder It was configured to be absorbed to the outside through the inside of the hollow shaft with water supplied to the outer peripheral side of the drum from the outside.

In such a rock excavator, the configuration of the bits provided with a plurality of crushing rollers is more important than the above, which brings a huge difference in the function and performance of the rock excavator according to the configuration of the bits.

As described in Utility Model Publication No. 96-1664, which I have the right to do, the circular wheel of the disc is formed inside the disk constituting the drum, so that the rock crushed powder is collected inside and not scattered to the outside. To facilitate the discharge, or as proposed in Utility Model Publication No. 96-5000, by forming a chamber in which the pressurized air inlet pipe is connected to the outside of the discharge pipe of the drum and forming a plurality of air injection holes in the discharge pipe to increase the suction power The rock crushed powder was easily discharged. Among the former, it is easy to collect the rock crushed powder inside the drum, but the supply position of the high pressure air is far from the excavation surface, so that the air pressure decreases and the suction force is weakened. Frequently, the head is easily worn and can not be worn. There is inclined injection holes had the configuration a few problems, such as due to the air pressure in the developer striking the inner wall at the time of the air jet discharge occurs chain collisions As a result, the emission efficiency of the rock crushing minute lowering the air pressure is reduced.

The present invention has been made in view of the problems caused by the above-described conventional design, and by varying the overall structure of the rock excavation bit, the rock crushed powder is better dispersed in the inside without being scattered to the outside, thereby discharging the rock crushed powder. The purpose of the present invention is to provide a high performance high quality rock bit for maximizing the discharge efficiency of rock crushed powder by further increasing the suction power of the discharge pipe formed in the drum.

1 is a perspective view showing the overall configuration of the present invention.

Figure 2 is a bottom view showing the configuration of the shredding roller group of the present invention.

Figure 3a, Figure 3b is a structural view of the main body of the bearing used in the present invention,

Figure 3a is a perspective view of the configuration of the bearing.

Figure 3b is a state in which the central shredding roller and the outer shredding roller is installed on the bearing.

Figure 4 is another configuration of the present invention.

Figure 5a, Figure 5b is a state diagram provided with a wear prevention tip that can be adjusted in the protrusion length in the present invention,

Fig. 5A is a state diagram provided on both sides of the upper wheel head.

Figure 5b is a state installed on both sides of the wing.

Figure 6 is a configuration diagram of the discharge pipe used in the present invention.

Figure 7 is another configuration of the discharge pipe used in the present invention.

8 is another configuration of the central shredding roller used in the present invention.

Figure 9 is another configuration of the central shredding roller used in the present invention.

♣ Explanation of symbols for the main parts of the drawing

10: Drum 11: disc

12: discharge pipe 12a: suction hole

13: Outward expansion part 13a, 14a: Air injection hole

14: Tilt bend 20: bearing

30a, 30b: center shredding roller 31: middle shredding roller

32a, 32b, 32c: Outer shredding roller 40: Wheel top cloud

50: wing 60: wear prevention tip

The present invention for achieving the above object in the construction of the rock drilling bit as shown in Figure 1 to 2 attached,

The pair of central shredding rollers 30a and 30b and three outer shredding rollers 32a, which are installed in a cross shape with the intermediate shredding roller 31 on the bottom of the disc 11 constituting the drum 10 of the bit ( One of the outer shredding rollers 32a of 32b) and 32c is provided in a straight line, and the other outer shredding rollers 32b and 32c are installed in an angular manner, and then the outer shredding roller 32a of one side is in a straight line. A suction hole 12a communicating with the discharge pipe 12 was formed in a relatively wide space secured between the central crushing roller 32a and the intermediate crushing roller 31 on the side combined with each other.

Here, the outer shredding roller 32a which is installed in a line with the pair of central shredding rollers 30a and 30b has two shaft coupling parts 20a and 20b as shown in the accompanying drawings. ) Is formed so that one of the central shredding roller (30a) and any one of the outer shredding roller (32a) is axially coupled to the bearing (20) formed integrally by using the bolt 21 to come in a straight line.

In addition, by forming a thick circular cylindrical upper head 40 on the outer circumferential side of the disc 11 constituting the drum 10 to form a narrow inner space in which the crushing roller group is installed, the suction power to suck the rock crushed powder is The outer peripheral edge of the disc 11 constituting the drum 10 as shown in Figure 4 attached to the rocking roller group and the annular upper head (40) so as not to pinch or as shown in the accompanying drawings By forming the blade 50 inclined in the same direction as the rotation direction of the drum 10 to facilitate the water to the inside of the drum 10 through the blade 50 and the blade 50 during the rotation of the drum 10 It can also be configured to increase the suction power to suck the rock crushed powder so that the present invention, as shown in Figs. 5a to 5b is an annular upper wheel head formed on the outer peripheral side of the disc 11 ( 40) and the inner end of the blade 50 is represented by an imaginary line The extension part 40a, 40b may be formed to protrude to the inside of the drum 10 as much as possible, and may be configured to surround the shredding roller group as much as possible, as well as the outer plate 11 constituting the drum 10. On both sides of the cylindrical upper head 40 and the blade 50 formed on the lower periphery, the wear-resistant tip 60 having strong abrasion resistance is fixed and fixed by the fixing bolt 61, but the rear end is combined with the adjusting bolt 62 to adjust the adjusting bolt. By adjusting the 62, the discharge length of the wear prevention tip 60 may be adjusted.

Reference numeral 51 shown in FIG. 5B is a blade reinforcing plate welded to prevent the blade 50 from being broken.

In addition, as shown in FIG. 6, an inclined outwardly extending portion 13 is formed in the discharge pipe 12 constituting the drum 10 and vertically penetrates upwardly from below the outwardly expanding portion 13 to the inside. By forming an air injection hole (13a) to eliminate the phenomenon that the air pressure hits the inner wall of the discharge pipe 12 during the injection of the air to increase the discharge efficiency of the rock crushed powder, or as shown in Figure 7 The air injection hole 14a vertically penetrating upward from the bottom of the inclined bent portion 14 formed in the discharge pipe 12 constituting the drum 10 is formed so that the air pressure when the air is injected into the inside of the discharge pipe 12. It can be configured to increase the discharge efficiency of rock crushed powder by eliminating the impact on the wall surface.

And in the present invention, as shown in Figure 8 attached to the inner bottom of the pair of central shredding rollers (30a ', 30b') installed in the bottom of the drum 10, the outer diameter is larger As shown in FIG. 9, a pair of central shredding rollers 30a "and 30b" installed at the center of the bottom of the drum 10 are recessed inwardly, and the outer diameters of both ends are provided. This same roller can also be installed.

The present invention configured as described above is a pair of central shredding rollers 30a and 30b installed in a cross shape with the intermediate shredding roller 31 on the bottom of the disc 11 constituting the drum 10 of the rock drilling excavation bit. One bearing, in which two shaft coupling portions 20a, 20b are integrally formed so that the outer shredding roller 32a of the whole and three outer shredding rollers 32a, 32b, 32c are in a straight line. The central shredding roller on the side of which the outer shredding roller 32a is coupled in a straight line by axially coupling the central shredding roller 30a on one side and one of the outer shredding rollers 32a with the bolt 21 to 20. Since a relatively large space is secured between 30a and the intermediate shredding roller 31, and a suction hole 12a is formed in any one of the secured spaces in communication with the discharge pipe 12, the inner diameter of the suction hole 12a is discharged. It can be made to match the internal diameter of (12), and it is easy to carry out rock crushing powder.

In addition, by forming a thick cylindrical upper head 40 on the outer circumferential side of the disc 11 constituting the drum 10, the suction force to suck the rock crushed powder by narrowing the inner space where the crushing roller group is installed as much as possible It is increased, and the rock crushing powder is not pinched between the crushing roller group and the annular upper head (40).

In addition, when the wing 50 is inclined in the same direction as the rotational direction of the drum 10 to the lower side of the outer periphery of the disk 11 constituting the drum 10 as shown in Figure 5b attached to the drum During the rotation of 10, water is easily gathered into the drum 10 through the blade 50 and the blade 50, so that the suction power for sucking the rock crushed powder is increased, as shown in FIGS. 5A and 5B. The inner end of the circular wheel top head 40 and the blade 50 formed on the outer circumferential lower side of the disc 11 is formed to protrude to the inside of the drum 10 as much as the extension portions 40a and 40b indicated by imaginary lines. If it can be configured to surround the shredding roller group as possible to protect the shredding roller group and at the same time maximize the function to easily collect the water inwards is very ideal as well as to constitute the drum 10 Formed on the outer circumferential side of the disc 11 Loosen the wear-resistant tip 60, which is abrasion resistant, which is installed on both sides of the upper wheel head 40 and the blade 50, and then loosens the fixing bolt 61. After adjusting the discharge length by turning the adjusting bolt 62, the fixing bolt loosened. If the 61 is firmly tightened and then used, it is possible to prevent abrasion of the upper wheel head 40 and the blade 50.

Meanwhile, as shown in FIG. 6, the outwardly extending portion 13 having a gentle inclination is formed in the discharge pipe 12 constituting the drum 10 and is vertically upwardly penetrated from the bottom of the outwardly expanding portion 13 to the inside. When one air injection hole 13a or 14a is formed or as shown in FIG. 7, the inclined bent portion 14 formed below the discharge pipe 12 constituting the drum 10 is vertically inward from the lower side. In the case of forming the air injection holes 13a and 14a upwardly through, the air pressure does not hit the inner wall surface of the discharge pipe 12 during the injection of air, thereby increasing the discharge efficiency of the rock crushed powder.

And as shown in Figure 8 when the pair of central shredding rollers (30a, 30b) installed in the bottom center of the drum 10 is installed to be recessed inward, when the outer diameter is configured to be installed inwards Since the center shredding rollers 30a and 30b are recessed inward, the bit itself may not be oscillated before, after, left, or right when rock excavation, as shown in FIG. 9. A pair of central shredding rollers installed at the bottom center of the drum are recessed inwardly, but the bit itself does not swing back, forth, left, and right even when the outer diameters of both ends are installed with the same rollers. Of course, the material can be saved.

As described above, the present invention makes the overall structure of the rock drilling bit diverse, so that the rock crushed powder is collected in the inside without being scattered to the outside during the rock excavation to facilitate the discharge of the rock crushed powder as well as the drum. Increasing the suction power of the discharge pipe formed in the maximizing the discharge efficiency of the rock crushed powder is a very new invention that can provide breakthrough electricity for rock excavation work.

Claims (9)

In constructing rock drilling bits, On the bottom of the original disk, the intermediate shredding roller, a pair of center shredding rollers installed in the cross shape, and one outer shredding roller among three outer shredding rollers are installed in a line, and the remaining outer shredding rollers are divided in an angle. And a suction hole communicating with the discharge pipe in the space secured between the central crushing roller and the intermediate crushing roller of the side where the outer crushing roller is coupled in a straight line. The method of claim 1, The outer shredding roller which is installed in a line with the pair of central shredding rollers is a straight line by axially combining one of the central shredding rollers and any one of the outer shredding rollers to one bearing formed with two shaft coupling parts integrally using bolts. Rock drilling bit, characterized in that configured to come on. By forming a thick circular cylindrical top head under the outer circumference of the disk constituting the drum to narrow the inner space in which the crushing roller group is installed, the suction power to suck the rock crushed powder is increased, as well as the crushing roller group and the circular ring Rock excavation bits, characterized in that the rock crushing powder is not caught between the upper head. The blade is formed to be inclined in the same direction as the rotational direction of the drum under the outer circumference of the original disk constituting the drum, so that the water is easily collected inside the drum through the blade and the blade during rotation of the drum to suck out the rock crushed powder. Rock excavation bit, characterized in that configured to increase the absorption power. The method according to claim 3 or 4, The wear-resistant tip having a high wear resistance is fixed to both the sides of the upper wheel of the disc and the wing formed on the outer circumference of the disc constituting the drum with a fixed bolt, but the rear end is combined with the adjustment bolt to prevent wear by adjusting the adjustment bolt. Rock drilling bit, characterized in that configured to adjust the discharge length of the. Phenomenon in which the air pressure hits the inner wall surface of the discharge pipe when the air is injected by forming an inclined outwardly extending portion at the lower side of the draft tube constituting the drum and vertically forming an air injection hole vertically penetrating upward from the underside of the outwardly expanding portion. Rock excavation bits, characterized in that configured to increase the discharge efficiency of rock crushed powder by eliminating. The discharge efficiency of rock crushed powder is formed by eliminating the phenomenon that the air pressure hits the inner wall surface of the discharge pipe when the air is sprayed, by forming an air injection hole vertically penetrating upward from the lower side of the inclined bent portion formed under the draft tube constituting the drum. Rock drilling bit, characterized in that configured to increase the. Rock drilling bit, characterized in that the installation is installed so that the center of the pair of central shredding roller is installed in the bottom of the drum inward, the outer diameter is larger inward. A rock drilling rig bit, characterized in that a pair of central shredding roller is installed in the bottom center of the drum to be recessed inward, the outer diameter of both ends are installed with the same roller.