KR200298156Y1 - Hammer bit of hammer bit hitting apparatus for digging - Google Patents

Abstract

The present invention relates to a hammer bit of the drilling hammer bit striking device, the back head, the check valve, the sleeve tube to which the hammer bit is slidably coupled, and is located above the hammer bit inside the sleeve tube, Air distribution that strikes the hammer bit by reciprocating the piston up and down by distributing the air pressure introduced into the inlet hole of the back head, located between the piston that hits the hammer bit downward while moving up and down In the hammer bit of the drilling hammer bit hitting device having a ruler, the hammer bit is a pneumatic supply hole formed in the vertical direction at the inner center, the pneumatic discharge hole is bent in a diagonal line at the lower end of the pneumatic supply hole and guided to the outside, the body It is formed on the upper surface of the piston strike surface and the bottom surface of the piston is contacted and hit the lower surface of the piston, is formed on the bottom of the body It is equipped with excavation strike surface contacting the ground and hitting downward when the piston strikes, and a plurality of tip discharge paths formed with recesses inwardly on the lower circumferential surface of the body to smoothly hit the hammer bit without the need for a check valve. In addition to maintaining rigidity, there is no fear of breakage during excavation work, which greatly reduces the excavation work time and greatly reduces the construction cost.

Description

Hammer bit of hammer bit hitting apparatus for digging}

The present invention relates to a drilling hammer bit, more specifically, it can smoothly hit the hammer bit without the need for a check valve to not only maintain the rigidity of the hammer bit, there is no fear of breakage during excavation work It relates to a hammer bit of the drilling hammer bit hitting device that the excavation work time is greatly shortened and the construction cost is greatly reduced.

In general, boring is the drilling of small diameter holes in the earth's crust to understand the structure and properties of the strata, to gain knowledge of the interior of the earth's crust, or to obtain oil, natural gas, hot springs, and groundwater. It is made to collect the back.

Depending on the purpose of use, there are various scales, ranging from several meters to thousands of meters in length and several millimeters to tens of centimeters in diameter. Today, large-scale drilling of several meters in diameter is carried out for use as a vertical shaft.

According to the excavation method, there are a shock type that impacts the bit and breaks the rock and drills it, and a rotary type that drills by rotating the bit in which the diamond and cemented carbide is inserted into the end of the steel pipe (pipe) with respect to the rock surface. The deepest drilling hole in the world is 8,000 meters perforated in the American oil field.

Since the length of the steel pipe used in such a large one is lengthened by connecting a certain length of the iron pipe in order to extend the length. However, when exchanging bits or inserting a steel pipe called a "casing pipe" into an excavated hole, it is necessary to lift the steel pipe (also called a rod, or steel tube) for various investigations.

To this end, large hoisting towers are to be installed, and around them, power plants or excavation equipment used for the purpose of removing the excavated material and preventing the collapse of the hollow walls are to be arranged. The landscape of the elevated tower seen in the oil field shows that drilling is being done.

Drilling is also an important task in mines against underground deposits. In mines, it may be used as a drainage hole or a ventilation hole, a passage through which ores and waste-rock pass, or for the purpose of passing an electric cable. It is common to conduct drilling for preliminary investigations before exploration of the mines by exploration or advanced drilling of geological or mineral deposits.

Mining drilling is not as large as petroleum drilling, but much has been developed to allow free drilling of holes in any direction, at any angle and at any depth. In the rotary drilling, the rock can be extracted into the core of a thin rod called 'core', so that good results can be obtained for the top yarns such as rock quality, dignity and deposits.

In the impact formula, it is possible to determine the quality and quality of cancer by investigating the powder from the hole during drilling. Core drilling is called core drilling, and core drilling is called bunny drilling. Drilling is also used as a hole for investigating the structure and situation inside the crust because it can insert various measuring measuring instruments and experimental devices. Other uses include dam construction of power plants and basic surveys of buildings.

Excavation hammer bits used for such drilling are to use hammer bits of different specifications and structures according to the purpose or the conditions of the geological (geological) bar, the type of hammer bits for direct digging and indirect digging It is roughly divided into bits.

The hammer bit for the direct excavation method is used in a manner in which the state of the ground layer is good or does not drill deeply, and the ground layer is excavated while the bit housing mounted on the hammer drill rotates without using a steel tube.

The hammer bit for indirect digging method is used in the method of drilling while embedding the steel pipe in the drilling hole, and after the bit housing and the bit mounted on the hammer drill drill a hole wider than the diameter of the steel pipe, It is taken out.

The indirect digging hammer drill increases the pressure as it goes deep into the ground, and the load caused by a lot of energy interferes with the hammer bit, making the digging work difficult.

In addition, the hammer bit that needs to excavate a hole wider than the diameter of the steel tube being buried, the steel tube is embedded at the same time as the amount of excavation, and if the hole is not excavated wide enough to easily enter the steel tube, In addition to the difficulty of embedding the pipe, a lot of load is applied during the excavation, which causes breakage of the hammer bit, and it becomes very difficult to remove the hammer bit after the excavation.

Therefore, in the art, many products have been developed in order to supply a product capable of performing rapid excavation work as well as supplying a stronger hammer bit, and thus, eccentric rotation type and open type products have been known.

In the eccentric rotation type, the excavation bit is eccentrically rotated and excavation is carried out.This product is eccentric in structure, which makes fast excavation impossible and at the same time, the hammer bit is broken even under a small load or the neck of the bit housing is Problems such as breakage have occurred and are not widely supplied.

The open type product is a structure in which two or three multi-drive hammer bits are open on the bottom of the bit housing, which is structurally so apart from the bits that the support part supporting the bits is excluded. There is a problem that the expensive excavation work because the problem occurs, such as broken even in small shocks do not fulfill the function of.

The price of the hammer bit varies greatly depending on the type and specification of the product, but if it is an indirect digging hammer bit, it is an expensive product that costs at least 5 million won to 2 to 30 million won per bit, so every time you drill one borehole Core supervision will be carried out carefully excavation work. If a bit breakage problem occurs during work, the impact is directly related to the cost of construction.

4 is a side cross-sectional view of a conventional drilling hammer bit, Figure 5 is a front view of a conventional drilling hammer bit, the conventional hammer bit 100 is formed with a pneumatic supply hole 102 in the inner center, the hammer bit 100 ) At the bottom, the pneumatic supply hole 102 is separated into a plurality of pneumatic discharge holes 104, the bottom is formed with an excavation strike surface 106 in contact with the ground is excavated, the excavation strike surface 106, the upper side Tip discharging path 108 is formed as a recess, the upper end of the pneumatic supply port 102 is processed to fix the check valve 110, the check valve 110 is mounted to block the air pressure flowing into the upper The hammer bit 100 is fastened to a bit housing (not shown).

The bit housing is a fuselage that excavates a borehole while being rotated in a protective pivot in a state in which a hammer bit 100 is coupled to a hammer drill (not shown) and put into a steel tube (not shown).

However, the excavator equipped with such a conventional drilling hammer bit 100 is broken when the check valve 110 on the upper end of the hammer bit 100 due to the impact force of the piston (not shown) during the excavation work, underground during the hot spring work The steel pipe (not shown), which was dug 500 m to 1000 m in length, took out a long time, and the hammer bit 100 located at the bottom was replaced. Not only greatly increased, there was a structural problem of weak rigidity of the hammer bit 100 itself. ,

In addition, the conventional hammer bit 100, the upper end is processed in order to install the check valve 110 is a problem that the structural rigidity, such as cracks after the predetermined time elapses by repeated strokes by the piston is deteriorated There was this.

The present invention is to solve the conventional problems as described above, it is possible to smoothly hit the hammer bit without the need for a check valve can not only maintain the rigidity of the hammer bit, there is no fear of breaking during excavation work It is an object of the present invention to provide a hammer bit of the drilling hammer bit hitting device that the excavation work time is greatly shortened and the construction cost is greatly reduced.

In order to achieve the above object, the present invention has a back head formed with an inlet hole through which a constant pressure of pneumatic pressure flows in the center, and is located at the bottom of the back head inlet hole to prevent the inlet air pressure from flowing back into the inlet hole of the back head. 첵 a valve, a sleeve tube in which an upper end of the back head is hermetically coupled to the upper end by a long pipe, and a hammer bit fixedly coupled to the lower end by a chuck to be slidably coupled, and a sleeve tube positioned above the hammer bit inside the sleeve tube. It is located between the piston which hits the hammer bit downward while moving up and down in the inside, and the pneumatic flow which is located between the piston and the back head inside the sleeve tube and flows the piston up and down to hit the hammer bit by moving the piston up and down. In the hammer bit of the drilling hammer bit striking device having an air distributor;

The hammer bit is a pneumatic supply hole formed in the vertical direction in the inner center;

A pneumatic discharge hole bent in an oblique line at the lower end of the pneumatic supply hole and guided outward;

A piston strike surface formed as a smooth surface on an upper surface of the body and hitting the bottom surface of the piston in contact;

An excavation strike surface formed on the bottom of the body to be in contact with the ground and to be hit by falling when the piston is hit;

It is characterized in that it has a plurality of tip discharge passage formed in the recess in the inner peripheral surface of the lower body.

Figure 1 is a cross-sectional view of the use state of the piston striking after showing the hammer bit is equipped with an embodiment of the present invention,

Figure 2 is a cross-sectional view of the use state of the piston hitting the piston showing the appearance of the hammer bit is an embodiment of the present invention,

Figure 3a is a side cross-sectional view of a hammer bit according to an embodiment of the present invention,

3b is a front view of a hammer bit according to an embodiment of the present invention;

4 is a side cross-sectional view of a conventional hammer bit,

5 is a front view of a conventional hammer bit,

* Description of the symbols for the main parts of the drawings *

10; Hammer bit 11,102: Pneumatic supply hole

12,104: Pneumatic discharge hole 13: Piston strike surface

14,106: Excavation strike surface 15,108: Tip discharge furnace

20: piston 21: distribution hole

22: ascending hole 23: regression

24: descent hole 25: discharge induction coating

26: sealing jaw 30: air distributor

31: operating tube 32: through hole

33: operator 34: guide blade

35: flange 36: inflow hole

37: main part of the valve 60: slab pipe

62: ascending recess 74: chuck

80: check valve 90: back head

92: inlet hole 110: check valve

Hereinafter, the present invention in more detail by the accompanying drawings as follows.

1 is a cross-sectional view of the operating state of the piston hitting the piston after showing a state in which the hammer bit is equipped with an embodiment of the present invention, Figure 2 is a cross-sectional view of the use state of the piston hitting the lower stage when the hammer bit is mounted on the present invention embodiment 3A is a side cross-sectional view of a hammer bit according to an embodiment of the present invention, and FIG. 3B is a front view of a hammer bit according to an embodiment of the present invention.

Hammer bit 10 of the present invention is a rust-free metal material, the pneumatic supply hole 11 formed in the vertical direction in the inner center and the pneumatic discharge is bent in an oblique line formed at the lower end of the pneumatic supply hole 11 to the outside Ball 12, a piston strike surface 13 formed on the upper surface of the body and hitting the lower surface of the piston 20 and hitting, and formed on the bottom of the body to contact the ground and hit the piston 20 Excavation hitting surface 14 to be hit by the falling down and excavated, and a plurality of tip discharge path 15 formed in the inner portion in the lower body circumferential surface.

The piston strike surface 13 of the upper end of the hammer bit 10, which is a smooth surface, is not subjected to any other processing except that the pneumatic supply hole 11 is formed downward in the center, thereby maintaining the rigidity of the piston 20. It is possible to maintain the stiffness for a long time even after a continuous blow.

Looking at the operating state of the subject innovation having such a configuration as follows.

As shown in FIG. 1, when air pressure having a constant pressure is supplied through the inlet hole 92 of the back head 90, the air pressure is passed through the space between the back head 90 and the check valve 80. The through hole 36 of the through through the flange 35 and the through hole 32 of the operating pipe 31, the pneumatic pressure through the through hole 32 through the operating hole 33 in the lower portion of the operating pipe 31 The air flows into the rising hole 22 of the piston 20, and the pneumatic pressure of the rising hole 32 is the discharge guide hole 25 between the piston 20 and the sleeve pipe 60 and the rising recess of the sleeve pipe 60. Via (62), it enters and fills the space between the lower part of the piston (20) and the sleeve tube (60).

The pneumatic pressure filled in the space between the lower portion of the piston 20 and the sleeve tube 60 pushes the piston 20 upward in the sleeve tube 60 so that the piston 20 rises in the sleeve tube 60. In this case, the residual air located between the upper portion of the piston 20 and the sleeve tube 60 is lowered from the return recess 23 between the air distributor 30 operating tube 31 and the piston 20 upwardly. Through the long hole 24, the piston 20 flows into the distribution hole 21, and the introduced air pressure is lowered through the pneumatic supply hole 11 of the hammer bit 10 through the distribution hole 51 of the piston 50. Is discharged to the pneumatic discharge hole (12).

As shown in FIG. 2, the piston 20 raised in the sleeve tube 60 has a pneumatic pressure introduced through the inlet hole 36 and the hole 32 of the air distributor 30, and the lower portion of the operating tube 31. When filled in the return recess 23 of the piston 20 via the operating hole 33 of the, the air pressure through the lower hole 24, the sleeve tube 60 between the air distributor 30 and the top of the piston 20 Filled in space.

The pneumatic pressure filled between the air distributor 30 and the piston 20 and having a constant pressure lowers the piston 20 quickly and strongly downward from the inside of the sleeve tube 60 to lower the piston strike surface of the lower hammer bit 10. (13) is hit hard to the bottom.

At this time, residual air existing between the piston 20 lower portion and the sleeve tube 60 is introduced through the pneumatic supply hole 11 of the hammer bit 10 and discharged to the outside through the pneumatic discharge hole 12 at the bottom. .

Excavator equipped with a hammer bit 10 of the hammer bit striking device of the present invention, as the pneumatic pressure flows into the air distributor 30, the piston 20 is continuously raised and lowered repeatedly in the vertical direction, The hammer bit 10 of the lower part of the piston 20 continues the excavation work by continuously hitting the ground surface with the excavation strike surface 14 at the lower end with the striking force received on the piston strike surface 13 of the upper end.

Pneumatic pressure supplied through the pneumatic supply hole 11 of the hammer bit 10 is supplied at a strong pressure to escape to the outside of the excavation hole through the tip discharge passage (15) together with a tip such as soil or stone generated during excavation do.

The present invention can hit the hammer bit smoothly without the need for a check valve to maintain the hammer bit rigidity, and there is no fear of breakage during the excavation work, which greatly reduces the excavation work time and the construction cost. There is a significant savings.

The present invention is not limited to the above-described specific preferred embodiment, and any person having ordinary skill in the art to which the present invention pertains may make various modifications without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (1)

The back head 90 is formed with an inlet hole 92 through which a predetermined pressure of pneumatic pressure flows, and the pneumatic pressure introduced at the lower end of the back head 90 inlet hole 92 is an inlet hole of the back head 90. 첵 valve 80 to prevent the flow back to (92), and the lower end of the back head 90 is coupled to the upper end by the long pipe body to be sealed and the hammer bit fixed by the chuck 74 in the lower end is slidable. Sleeve tube 60 to be coupled to each other, a piston 20 positioned above the hammer bit inside the sleeve tube 60 and reciprocating up and down within the sleeve tube 60 and striking the hammer bit downward, and the sleeve tube ( 60) an air distributor positioned between the inner piston and the back head 90 to distribute the pneumatic pressure introduced into the inlet hole 92 of the back head 90 to reciprocate the piston 20 up and down to hit the hammer bit. In the hammer bit of the drilling hammer bit striking device having a 30; The hammer bit 10 has a pneumatic supply hole 11 formed in the vertical direction in the inner center; Pneumatic discharge hole 12 is bent in an oblique line at the lower end of the pneumatic supply hole 11 and guided to the outside; A piston strike surface 13 formed as a smooth surface on an upper surface of the body and hitting the bottom surface of the piston 20 in contact; An excavation strike surface 14 formed on the bottom of the body and in contact with the ground and hitting downward when the piston 20 is hit; Hammer bit for drilling hammer bit hitting device, characterized in that it has a plurality of tip discharge path (15) formed in the inner circumferential surface on the lower end of the body.