KR200348757Y1 - hammer bit having prevention apparatus obstruction movement of piston - Google Patents

Abstract

The present invention relates to a hammer bit piston reverse action prevention device, and the back head is formed in the inlet hole in which a constant pressure of pneumatic pressure flows in the center, and the inlet air is located at the lower end of the inlet hole to flow back into the inlet hole of the back head The check valve to prevent, the upper end of the back head is sealed in the lower end of the head head is fixed by the chuck and the lower end of the sleeve tube is a long tube with a hammer bit located inside, and the inside of the sleeve is located above the hammer bit A piston that strikes the hammer bit while moving up and down and strikes the hammer bit, and an air distributor located between the piston inside the sleeve tube and the back head to distribute the pneumatic flow into the inlet hole of the back head to move the piston up and down to hit the hammer bit. In one hammer bit striker, the air distributor has a check valve coupled to the top center and the top outer periphery This has a plurality of inlet pipe hole and the outer peripheral edge of the center side is in close contact with the inner surface of the sleeve tube and the through-hole is formed in communication with the inlet tube hole in the center side, the rising recess is formed as a recess in the inner side of the sleeve tube inner peripheral center, It has a distribution hole in the center and the upper end is fitted into the through hole of the air distributor, and has an inner tube formed with a rising side hole at the lower side and is formed on the outer side of the inner tube so that the upper hole is formed on the outer periphery of the upper end, A distribution pipe having an appearance having a bottom hole formed at a short position is formed, and the piston has a through hole at the center side, and the appearance of the distribution pipe is in close contact with each other. Formed on the outer circumference downward from the rising induction hole with the rising induction hole leading the introduced external air pressure between the lower end of the piston and the upper end of the hammer bit. It has a long hole, and when it descends on the sleeve tube, the external air introduced through the lower and upper holes of the distribution pipe is guided between the upper end of the piston between the distribution pipe and the sleeve pipe, and protrudes from the outer side, It forms a sealing protrusion to be in close contact, the lower end is located between the outer peripheral edge of the hammer bit and the sleeve tube and the upper end is located between the outer peripheral edge of the piston and the sleeve tube to the tube having a support protrusion protruding in close contact with the outer peripheral edge of the piston Distribution holes are formed in four directions on the outer circumference of the outer periphery, and the lower part of the distribution hole is provided with a working tube having an operation hole that is in close contact with the upper edge of the hammer bit when the piston is raised and is distributed at the top of the hammer bit when the piston descends.

Description

Hammer bit having prevention apparatus obstruction movement of piston}

The present invention relates to a hammer bit piston reverse action prevention device, and more particularly, the hammer force of the hammer bit when the piston strikes by smoothly circulating the flow of pneumatic pressure filled between the bottom of the piston and the top of the hammer bit when hitting the top of the hammer bit of the piston It relates to a hammer bit piston anti-backlash preventing device which is not at all deteriorated.

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 oil, natural gas, hot springs, and groundwater. It is made to collect the back. According to the excavation method, there is a shock type that impacts the bit and breaks the rock and drills it, and a rotary type that drills by rotating the bit inserted with diamond and cemented carbide at the end of the steel pipe (pipe) with respect to the rock surface.

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 is that the steel tube is embedded at the same time as the amount of excavation, and if the hole is not widely excavated to easily enter the steel tube, Not only becomes difficult to bury, but also takes a lot of load during excavation, which causes breakage of the hammer bit, and it becomes very difficult to remove the hammer bit after 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.

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. Problems such as failure to function and break even in small shocks, expensive drilling will be done.

The price of these hammer bits varies greatly depending on the type and specification of the product, but indirect drilling hammer bits are expensive products that cost at least 5 million won to 30 million won for each 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.

In order to solve this problem, the structure of the hammer bit is improved and the hammer bit striking device of FIG. 8 is proposed. The configuration of the back head 190 is formed with an inlet hole 192 through which a constant pressure of pneumatic pressure is introduced. And a check valve 180 located at the lower end of the inlet hole 192 to prevent the inlet air pressure from flowing back to the inlet hole 192 of the back head 190, and a back head 190 inside the upper end. The lower end of the sleeve tube 120 is a long tube that is coupled to the sealing and the hammer bit 150 fixed by the chuck 174 is slidably coupled to the lower inner side, and the hammer bit 150 inside the sleeve tube 120 The lift hole 111 is positioned at the upper side and is fitted to the air distributor 130 to be reciprocated in the sleeve tube 120 and described later, and is formed at the center thereof. Descending to guide the outside air supplied to the air distributor 130 to the upper body The coating 112 is formed and the other side of the body descends through the operating hole 131, the induction hole 114 is formed to flow the external air to the lower side of the body is formed in the sleeve tube 120, the elevating in the lower and lower body A piston 110 is formed to protrude downward and strikes the hammer bit 150 to the lower portion of the piston 110 and the hammer bit 150 is positioned between the hammer bit 150 and the piston 110 above the piston ( 110, the guide tube 160 for guiding the lowering of the striking rod 116 in the sleeve tube 120 when the hammer bit 150 of the striking rod 116 is hit, and the upper portion of the top of the sleeve tube 120 Located in the closed state between the piston 110 and the back head 190, the center side is protruded to the lower side of the operating hole 151 is ejected air pressure introduced into the inlet hole 192 of the back head 190 ) Is formed to appropriately distribute the external air pressure to the lower induction hole 112 and the rising induction hole 114, the piston 110 up and down The operating hole 131 for hitting the hammer bit 150 by movement is made of an “T” shaped air distributor 130.

However, such a conventional hammer bit striking device is not after the hammer bit 150 of the upper end of the hammer bit 150, the pneumatic missing and supplementary flow between the upper end of the hammer bit 150 and the piston 110 is not smooth. After hitting the hammer bit 150 of the piston 110, there was a problem that the piston 110 bounces directly upward from the top of the hammer bit 150.

Thus, the piston 110 has a lot of problems that the impact force hitting the upper end of the hammer bit 150 is greatly reduced.

The present invention is to solve the conventional problems as described above, by smoothly flowing the flow of pneumatic pressure filled between the piston lower end and the upper end of the hammer bit when hitting the hammer bit top of the piston to prevent the piston reverse operation when converting to a no-load state during the piston operation The object is to provide a device.

In order to achieve the above object, the present invention provides a back head having a inlet hole in which a constant pressure of pneumatic pressure flows in the center, and a check valve that is located at the bottom of the inlet hole to prevent the inlet air pressure from flowing back into the inlet hole of the back head. And, inside the upper end, the lower end portion of the back head is hermetically coupled, and the lower inner side is fixed by the chuck, the sleeve tube is a long tube with a hammer bit located inside, and the upper and lower reciprocating movements are located above the hammer bit inside the sleeve tube. A hammer bit striker having a piston striking the hammer bit and an air distributor positioned between the piston inside the sleeve tube and the back head and distributing air pressure introduced into the inlet hole of the back head to move the piston up and down to strike the hammer bit. In an apparatus;

The air distributor has a check valve coupled to the top center, and has a plurality of inlet pipes between the top outer circumference and the back head, and the outside circumference of the center side is in close contact with the inner side of the sleeve tube, and the through hole communicates with the inlet pipe at the center side. Formed;

An upward recessed portion is formed as a recessed portion at an inner circumferential center side of the sleeve tube;

It has a cylindrical hole in the center and the upper end is fitted into the through hole of the air distributor, and has an inner tube formed with a rising side hole at the lower side and is formed on the outside of the inner tube so that the upper hole is formed on the outer periphery of the upper end and the inner tube at the bottom thereof. A distribution tube having an appearance in which a lower hole is formed at a shorter position;

The piston has a through hole at the center side and the appearance of the distribution pipe is closely adhered, so that the external air pressure introduced through the rising hole of the distribution pipe through the lower hole and the distribution hole at the lower part of the sleeve pipe is raised between the lower end of the piston and the top of the hammer bit. It has an induction hole and has a long hole formed on the outer periphery from the rising induction hole, and when descending on the sleeve pipe, the external air pressure introduced through the lower hole and the upper hole of the distribution pipe is led between the upper end of the piston between the distribution pipe and the sleeve pipe. Protruding to form a closed protrusion in close contact with the sleeve tube at the lower side of the rising recess when descending;

The lower part is located between the upper edge of the hammer bit and the sleeve tube and the upper part is positioned between the outer edge of the piston bottom and the sleeve tube and has a support protrusion protruding in close contact with the lower end of the piston. The distribution hole is formed and the lower end of the distribution hole has a feature that the operating tube having a working hole is in close contact with the outer peripheral edge of the hammer bit when the piston is raised, and is distributed on the upper end of the hammer bit when the piston is lowered.

Figure 1 is a side cross-sectional view of the operating state showing the pneumatic flow when the piston rises in the embodiment of the present invention,

2 is an enlarged cross-sectional view of the main part of FIG. 1;

3 is a plan view of the operating tube according to an embodiment of the present invention,

4 is a side view of FIG. 3;

5 is a cross-sectional view taken along the line S-S 'of FIG.

Figure 6 is a side cross-sectional view of the operating state showing the pneumatic flow when the piston descends in the embodiment of the present invention,

7 is an enlarged cross-sectional view of the main part of FIG. 6;

Figure 8 is a side cross-sectional view of the operating state showing the pneumatic flow when the piston descends of the conventional design.

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

10: piston 11; Through hole

12: ascending induction work 13: sealing projection

14: long hole 20: operating tube

21: distributors 22: support protrusions

23: operator 30: air distributor

31: inlet pipe 32: through hole

40: distribution pipe 41: inner pipe

42: rising side 43: distribution ball

45: appearance 46: the top ball

47: lower hole 50: hammer beat

60: sleeve tube 61: ascending recess

74: Chuck 80: Check Valve

90: back head 92: inlet hole

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

Figure 1 is a side cross-sectional view of the operating state showing the pneumatic flow when the piston rises in the embodiment of the present invention, Figure 2 is an enlarged cross-sectional view of the main part of Figure 1, Figure 3 is a plan view of the operation pipe according to the embodiment of the present invention, Figure 4 is 5 is a cross-sectional view taken along line S-S 'of FIG. 3, and FIG. 6 is a side cross-sectional view of an operating state showing a pneumatic flow when the piston descends according to an embodiment of the present invention, and FIG.

Hammer bit piston reverse action prevention device of the present invention is a back head 90 is formed with an inlet hole 92 in which a pneumatic pressure of a constant pressure is introduced in the center, and a check valve (80) to prevent the flow back to the inlet hole 92 ), A sleeve tube 60 having a piston 10 and a hammer bit 50 located therein, and having an ascending recess 61 as a recess in an inner side in a long tube through which the piston 10 reciprocates, and a sleeve tube ( 60 is located between the inner piston 10 and the back head 90, the check valve 80 is coupled to the upper center and has a plurality of inlet pipes 31 between the upper outer periphery and the back head 90 The outer periphery of the center side is in close contact with the inner surface of the sleeve tube 60, and the through hole 32 is formed in communication with the inlet tube hole 31 at the center side to hit the hammer bit 50 by reciprocating the piston 10 up and down. The air distributor 30 and the cylindrical having a distribution hole 43 in the center and the upper end is fitted into the through-hole 32 of the air distributor 30 The inner tube 41 is formed on the lower side of the inner tube 41 and the outer side of the inner tube 41 is formed on the outer side of the upper outer periphery of the upper hole 46 is formed on the lower side of the outer tube 41, A distribution tube 40 having an exterior 45 having a lower hole 47 formed at a short position, and a through hole 11 at a central side thereof, and the exterior 45 of the distribution tube 40 are in close contact with each other. ) Ascending from the lower side guides the external air pressure introduced through the lower side hole 47 and the distribution hole 43 through the rising side hole 42 of the distribution pipe 40 between the lower end of the piston 10 and the upper end of the hammer bit 50. It has a rising induction hole 12 and has a long hole 14 formed on the outer periphery downward from the rising induction hole 12, the lower hole 47 and the upper hole of the distribution pipe 40 when descending from the upper sleeve tube 60 The outside air pressure introduced through the (46) is guided between the upper end of the piston 10 between the distribution tube 40 and the sleeve tube 60, and protrudes from the outer side at the lower side of the rising recess 61 when descending. Piston 10 having a sealing projection 13 in close contact with the rib tube 60, and the lower end is located between the outer peripheral edge of the hammer bit 50 and the sleeve tube 60, the upper end and the lower end of the piston (10) It is located between the circumferential edge and the sleeve tube 60 and has a support protrusion 22 protruding in close contact with the lower outer circumference of the piston 10. (21) the lower end of the operation pipe (20) having a working hole (23) in close contact with the outer peripheral edge of the hammer bit 50 at the time of the piston 10 rises and flows to the top of the hammer bit (50) when the piston (10) descends; It is composed of

Referring to the use state of the present invention as follows.

First, as shown in FIGS. 6 and 7, when the external air pressure having a constant pressure is supplied through the inlet hole 92 of the back head 90, the external air pressure is a space between the back head 90 and the check valve 80. Through the inlet pipe 31 between the air distributor 30 and the back head 90 through the through hole 32 through the inner tube 41 of the distribution pipe 40 through the lower hole 47 of the exterior 45 Filled between the distribution tube 40 and the sleeve tube 60 at the upper end of the piston 10 through the upper hole 46 through the).

In addition, as shown in FIG. 7, the pneumatic pressure filled between the outer periphery of the lower end of the sealing protrusion 13 of the piston 10 and the sleeve tube 60 is lowered in the lower part of the piston 10 on the downhole 14. It is discharged into the space between the lower end of the piston (10) and the upper end of the hammer bit (50) through the distribution hole (21) through the operating hole (23) and again through the through hole (11) of the piston (10) The piston 10 is filled in the sleeve tube 60 while being filled between the distribution tube 40 and the sleeve tube 60 at the upper end of the piston 10 through the lower hole 47 and the upper hole 46 of the 40. By lowering the hammer bit 50 is hitting the top strongly.

1 and 2, the piston 10 lowered from the top to the bottom in the sleeve tube 60 again has the induction hole of the piston 10 through the rising side hole 42 of the distribution tube 40. 12 through the long hole 14 of the piston 10, and the pneumatic pressure through the long hole 14 between the sleeve tube 60 and the outer periphery of the piston 10 is the lower end of the piston 10 and the operating tube 20 Filled in the space between the upper ends to raise the piston 10 in the sleeve tube (60).

Pneumatic pressure filled in the space between the outer circumference of the distribution tube 40 and the sleeve tube 6 at the upper end of the piston 10 is transferred to the lower hole 47 through the upper hole 46 of the exterior 45 of the distribution tube 40. The discharged and discharged high pressure is filled in the space of the lower end of the piston 10 and the upper end of the hammer bit 50 through the through hole 11 to raise the piston 10.

The support protrusion 22 of the operation pipe 20 seals the lower end of the piston 10 from the side and guides while supporting the ascending to prevent the piston 10 from bouncing or shaking.

At this time, the operating hole 23 of the operating tube 20 is in close contact with the outer periphery of the hammer bit 50 so that the pneumatic pressure is not circulated.

Excavator equipped with a hammer bit piston reverse action prevention device of the present invention, as the external air pressure is repeatedly introduced into the air distributor 30, the piston 10 in the sleeve tube 60 inside the vertical direction continuously It is repeatedly raised and lowered, the hammer bit 50 is hit by the piston 10 in the lower portion of the piston 10 is continuously hitting the ground surface with the excavation strike surface of the lower by the impact force received from the upper end of the piston 10 Excavation will continue without bouncing or shaking.

As such, the present invention smoothly distributes the flow of pneumatic air filled between the lower end of the piston and the upper end of the hammer bit when the upper end of the hammer bit of the piston prevents the loss of equipment by preventing the dynamic force of the piston when converting to the no-load state during the operation of the piston. It protects the bit and has the effect of prolonging the service life because it is structurally strong and strong.

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 (2)

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 inlet hole 92 flows back into the inlet hole 92 of the back head 90. Check valve 80 to prevent leakage, and the upper end of the inner end of the back head 90 is sealed in a long pipe is fixed by the chuck 74 in the lower inner side and the hammer bit 50 is located inside A chain sleeve tube 60, a piston 10 positioned above the hammer bit 50 inside the sleeve tube 60 and reciprocating up and down and hitting the hammer bit 50, and a piston inside the sleeve tube 60; Air distribution that is located between the 10 and the back head 90 and distributes the pneumatic pressure introduced into the inlet hole 92 of the back head 90 to reciprocate the piston 10 up and down to hit the hammer bit 50 In the hammer bit striking device having a ruler (30); The piston 10 has a through hole 11 at the center side, and the exterior 45 of the distribution pipe 40 is in close contact with each other so that the external air pressure introduced during the ascent of the piston tube 60 at the lower portion of the piston 10 is lowered to the bottom of the piston 10 and the hammer bit. (50) having a rising induction hole (12) leading between the upper end and has a long hole (14) formed on the outer periphery downward from the rising induction hole (12) and the external air pressure introduced when descending from the upper sleeve tube (60) piston (10) A) leading to the top and protruding from the outer surface to form a closing projection (13) in close contact with the sleeve (60) at the lower side of the rising recess (61); The lower end is located between the upper outer periphery of the hammer bit 50 and the sleeve tube 60, and the upper end is positioned between the lower outer periphery of the piston 10 and the sleeve tube 60 to protrude in close contact with the lower outer periphery of the piston 10. A distribution hole 21 is formed in the longitudinal direction at four portions of the outer circumference with the tubular body having the support protrusion 22 formed therein, and the lower end of the distribution hole 21 closely adheres to the upper outer circumference of the hammer bit 50 when the piston 10 is raised. And hammer bit piston reverse action prevention device characterized in that it has an operating tube (20) having an operating hole (23) is circulated in the upper end of the hammer bit (50) of the piston (10). The method of claim 1; The air distributor 30 has a check valve 80 coupled to the top center and has a plurality of inlet pipes 31 between the top outer circumference and the back head 90, and the outer circumference of the center sleeve sleeve 60. The through-hole 32 is in close contact with the inner surface and in communication with the inlet pipe 31 is formed in the center side; The rising recess 61 is formed inwardly in the inner circumferential center side of the sleeve tube 60; Cylindrical shape having an inner tube 41 having a distribution hole 43 in the center and the upper end is fitted into the through hole 32 of the air distributor 30 and the lower side hole 42 is formed in the lower portion of the inner tube 41. Is formed on the outside of the upper end of the outer periphery 46 is formed on the outer periphery and the lower end of the distribution tube 40 having an appearance 45 formed with a lower hole 47 in a shorter position than the inner tube 41 is formed Become; Piston 10 is the lower pressure through the lower hole (47) and the distribution hole 43 through the rising side hole 42 of the distribution pipe 40 through the lower piston (10) and the upper end of the hammer bit (50) Piston between the distribution tube 40 and the sleeve tube 60 through the lower air 47 and the upper hole 46 of the distribution pipe 40 when the guide pipe and lowered from the upper portion of the sleeve pipe 60 (10) Hammer bit piston reverse action prevention device, characterized in that guided between the upper end.