KR20060008016A - Drive rod for a drilling machine - Google Patents

Abstract

According to the present invention, a drive rod for a perforator includes a tubular body having a hollow portion, a first coupling member provided at an upper portion of the main body and having an inlet for water, and an outlet configured to be installed at a lower end of the main body to allow water to flow out The upper end portion is fixed to communicate with the second coupling member and the inlet of the first coupling member, extends toward the second coupling member to partition the hollow portion of the main body in the longitudinal direction to form an air reservoir and radially water at the end side. It characterized in that it comprises an inner tube formed with at least one discharge hole for separating the water and air by discharging.

Perforator, water hammer, beet, mud hammer, drive rod.

Description

Drive rod for a drilling machine

1 is a side view schematically showing a perforator,

2 is an exploded perspective view of a drive unit according to the present invention;

3 and 4 are cross-sectional views showing other embodiments of the drive unit.

5 is a cross-sectional view showing a state in which the drilling unit and the drive rod according to the present invention are coupled.

6 and 7 are cross-sectional views of the perforator unit showing the operating state of the piston.

The present invention relates to a perforator, and more particularly, to a direct drive using high pressure water, and to a drive rod of a perforator for drilling deep deep holes, such as drilling.

In general, a drilling machine for drilling deep holes in the ground for drilling, soil inspection, and groundwater development includes a method of simply rotating the bit, and rotating the bit or ball cutter and applying a pressing force (R.C.D).

The perforator transmits the rotational force and the hydraulic pressure to the excavation position by the hydraulic drive unit provided in the main body, an example of which is disclosed in Korean Patent Registration No. 10-0372049. The disclosed perforator has an excavation unit having drive rods vertically connected to each other and a piston connected to the drive rod of the shortest of the drive rods and a hammer for impacting the bit.

Such a perforator forms a separate hydraulic and high pressure line in the drive rod to operate the piston which is a hammer and to rotate the excavation unit. A gas chamber of a back head is provided at an upper end side of the piston operated by the hydraulic pressure supplied through the drive rods, and nitrogen gas is injected into the gas chamber of the back head so as to increase the impact force when the piston descends by the nitrogen gas. Doing.

When the back head gas chamber is provided on the upper end side of the piston as described above, the pressure of the back head gas chamber should be increased because the gas filling pressure in the gas chamber is relatively higher in the ground pressure as the depth of drilling increases. If the pressure in the back head gas chamber is not sufficiently increased, the impact force of the bit by the piston decreases as the depth of drilling deepens.

Korean Utility Model Registration No. 20-0258972 discloses a perforator in which the impact force of a bit is increased by a piston. The disclosed perforator installs a spring that is compressed when the piston is raised and has a structure capable of increasing the force applied to the bit when the piston is lowered by the compression force of the spring.

However, since the impact force by the spring increases the water pressure of the groundwater as the depth of drilling deepens, the impact force by the elastic force of the spring is also reduced.

The present invention is to solve the problems as described above, the drive rod of the perforator hammer can increase the impact force of the bit by providing a compression force compressed in the hydraulic pressure for lowering the piston for directly hitting the bit by using water pressure The purpose is to provide.

Another object of the present invention is to separate the air contained therein from the water that is the working fluid for driving the hammer to include the air in the water fundamentally to prevent the malfunction of the piston, the structure to increase the impact of the hammer is relatively The purpose is to provide a drive rod for a simple punching machine hammer.

The drive rod of the water hammer for drilling machine of the present invention for achieving the above object is a tubular body having a hollow portion,

A first coupling member installed at an upper portion of the main body and formed with an inlet for water;

A second coupling member installed at a lower end of the main body and having an outlet through which water is discharged;

The upper end is fixed to communicate with the inlet of the first coupling member, extending toward the second coupling member to partition the hollow portion of the body in the longitudinal direction to form an air storage portion and discharge the water radially to the end side and the water and Characterized in that it comprises an inner tube formed with at least one discharge hole for separating the air.

The end of the inner tube in the present invention is coupled to the outlet of the second coupling member, the inner tube on the side adjacent to the second coupling member so that water introduced through the inner tube can be discharged through the discharge hole The blocking member is installed. At least one inlet hole is formed in the lower inner tube of the blocking member to allow water discharged from the outlet hole to flow into the outlet port.

On the other hand, the end of the inner tube may be provided with a blocking member so that water can be discharged through the discharge hole, the end of the inner tube may be supported by at least one rib installed on the inner surface of the body.

Hereinafter, a preferred embodiment of a water hammer for a perforator according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the perforator 1 according to the present invention is guided by the machine body 2, the lid 3 supported thereon, the lid 3 and lowered by the driving means 4. The drive rod 100 is rotated, and a bit 40 is installed at an end of the drive rod 100 to perform a punching operation, and a puncher unit 10 for striking it.

The drive rod 100 is formed by connecting a plurality of unit drive rod units 110 to each other, and at least one drive rod unit located on a side adjacent to the perforator unit 10 is illustrated in FIGS. 2 and 3. As shown, it has an accumulator means for increasing the striking force of the piston of the water hammer of the cloth shared knit 10.

In more detail, the drive rod unit 110 is a tubular body 112 having a hollow portion 111 in the longitudinal direction, and is fixedly installed on the upper portion of the body 112 is the water inlet (113a) Is formed on the first coupling member 113, the second coupling member 114 having an outlet 114a which is installed at the lower end of the main body 112 and outflows water, and the first coupling member 113 The upper end is fixed to partition the inside of the body 112 in the longitudinal direction to form an air storage unit 120 and has an inner tube 130 forming a water supply passage.

The first coupling member 113 is coupled to the upper end of the tubular body 112 to be coupled to the other drive rod 110 ', the first base portion 113b is fixed to the body 112, It extends from the base and has a tapered coupling portion 113c. The tapered coupling portion 113c is provided with a screw for coupling.

The second coupling member 114 is coupled to the lower end of the main body 112, and has a second base 114b coupled to the lower end of the main body 112, with the outlet 114a at the center thereof. Is formed.

The first and second coupling members 113 and 114 are not limited to the above-described embodiments, and are respectively provided on both sides of the main body 112 so that the first and second coupling members 113 and 114 are coupled to adjacent drive rods to interconnect them. Anything is possible.

On the other hand, the inner tube 130 located in the hollow portion 111 of the main body 112 has a diameter relatively smaller than the diameter of the hollow portion 111, the upper end inlet of the first coupling member 113 Coupled with the 113a to partition the hollow 111 to partition the air storage 120. At this time, the coupling between the first coupling member 113 and the inner tube 130 is welded, and the air stored in the air storage unit is discharged to the coupling portion of the inlet 113a or the main body and the first coupling member 113. Confidentiality must be maintained to prevent The lower end of the fixed inner tube 130 is further provided with a separating means for separating the air from the water supplied through the inner tube 113 and stored in the air storage unit 120. As shown in FIG. 3, the separating means 135 is provided with a blocking member 136 that blocks water flowing through the inner tube at an end shaft of the inner tube 130 and is adjacent to the blocking member 136. The upper portion of the inner tube 130 discharges water flowing through the inner tube 130 between the outer circumferential surface of the inner tube 130 and the inner circumferential surface of the main body 112 in a radial direction corresponding to the air storage 120. The discharge hole 137 for separating the air contained in the water is stored in the air storage unit 120 is formed. At this time, the water discharged from the discharge hole 137 of the inner tube 130 is discharged to the outlet 114a of the second coupling member 114, the outer peripheral surface and the main body 112 of the end of the inner tube 130 It is supported by the rib 139 installed in the).

On the other hand, the end of the inner tube 130 may be supported by the outlet 114a of the second coupling member 114, as shown in Figure 4, in this case the water discharged from the discharge hole (137) A plurality of inlet holes 138 are formed in the lower inner tube 130 of the blocking member 136 so as to flow through the inlet 114a of the first coupling member 114. At this time, the discharge hole 137 and the inlet hole 138 should be sufficiently formed so as not to interfere with the flow of water.

The water perforator unit 10 installed at the end of the drive rod 110 having the accumulator means for increasing the hitting force has a tubular main having a hollow portion 11a as shown in FIGS. 5 and 7. The main body 11, the socket 12 is coupled to the end of the main body 11, the hydraulic pressure supply passage 12a is formed, and is installed at the lower end of the main body 11 to perform the drilling of the rock and soil layers Water hammer unit having a bit unit 20 having a bit 21 sliding in a length direction in the longitudinal direction and a main body 11 between the socket 12 and the bit unit 20 to strike the bit. 30 is provided.

The perforator unit 10 configured as described above will be described in more detail by component. The perforator unit has been filed in Korean Patent Application No. 10-2004-0020138 by the inventor.

The main body 11 is made of a cylindrical tubular, it is preferable to have a diameter equal to the diameter of the drive rod unit (110). The socket 12 is screwed or pin-coupled with the main body 11, and a tapered coupling part 12b is provided on the upper side for coupling with the drive rod unit 110, and the hydraulic pressure in the longitudinal direction is provided. The supply passage 12a is provided. The socket 12 is further provided with a check valve means 13 for preventing water from flowing back through the hydraulic pressure supply passage 12a.

The hammer unit 30 as shown in Figures 5 to 7 to lift the piston by using water directly to the predetermined pressure supplied through the hydraulic pressure supply passage (12a) of the socket 12.

Referring to the drawings, the hammer unit 30 is a cylindrical piston housing 31 coupled to the hollow portion 11a of the main body 11 and the piston housing 31 is slidably installed to the bit A piston 32 for striking 21 is provided. The piston 32 is a valve member 50 to be described later between the guide portion 32a guided when sliding to the piston housing 31 and the inner circumferential surface of the piston housing 31 gradually stepped away from the guide portion 32a. ) Is provided with a stepped portion (32b) to form a valve installation space 60 is installed, the stepped portion 32b adjacent to the guide portion 32a is a pressing portion larger than the diameter of the guide portion (32a) 32c is formed. A hollow portion 32d is formed in the piston 32 in the longitudinal direction, and a first communication hole 32e communicating with the hollow portion 32d is formed in the step portion 32b. Here, the piston 32 has a step portion 32b of which the diameter D1 of the guard part 32a is formed larger than the diameter D2 of the step portion side with the pressing portion 32c as the boundary, and the first communication hole The diameter D3 of the forming portion 32c is smaller than the diameter D2.

On the other hand, the inner surface of the piston housing 31 on the side corresponding to the step portion 32b of the piston 32 has a relatively large diameter to form a valve installation space 60, the piston housing 31 The end of the) is coupled to the sleeve member 40 is inserted into the main body 11 between the cylinder housing 31 and the socket 12. Here, the inner circumferential surface of the end 41 of the sleeve member 40 coupled with the piston housing 31 is formed to have a small diameter D4 to have a relatively small cross-sectional area. An inner portion of the sleeve member 40 is formed with a receiving portion 42 to receive an end when the piston is raised.

 In addition, the piston housing 31 and the valve installation space 60 partitioned by the piston 32 and the sleeve member 40 are slidably mounted to the piston housing 31 and the piston 32. The valve member 50 is installed to control the lifting of the passtone by the pressure of the water supplied to the valve installation space 60. The valve member 50 is provided with a predetermined width between the outer circumferential surface of the pressurizing portion 32 and the inner circumferential surface of the piston housing 31 to partition the first space portion 61, as shown in the first and second embodiments. An extension portion 52 and the extension which form a first blocking portion 51 and a second space portion 62 extending from the first blocking portion 51 and connected to the first communication hole 32e. A second portion extending from an end portion of the portion 52 and sliding toward an end side of the piston 32 and partitioning the end portion 41 and the second space portion 62 of the piston 32 and the sleeve member 40; The blocking part 53 is provided. The through-hole 54 is formed on the extension portion 52 side of the valve member 50 from the second space portion 62 to the end portion 41 of the slide member 40 to reduce the relative cross-sectional area to which hydraulic pressure is applied. Is formed. Here, the cross-sectional area in the longitudinal direction of the piston formed by the pressing portion 32c and the first blocking portion 51 protruding from the outer circumferential surface of the piston 32 is equal to the outer circumferential surface of the stepped portion 32b of the piston 32. It is formed relatively wider than the cross-sectional area in the piston longitudinal direction between the inner circumferential surface of the end portion 41 of the sleeve member 40. In addition, the first blocking portion 51 in contact with the pressing portion 32c has a length such that the contact state with the pressing portion 32c is not separated even when the valve member 50 is raised. Water separated and supplied to the first space portion 61 to raise the piston 32 is discharged through the second space portion 62, the first communication hole 32e, and the hollow portion 32d of the piston 32. It is desirable to be able to. Although not shown in the drawing, the third space portion 63 and the receiving portion 42 of the sleeve member 40 may be in communication with each other. Here, the initial communication of the piston 32, that is, at the time when the first step portion 51 and the pressing portion 32c are separated, the first communication hole 32e and the second space portion 62 are connected and the piston As the portion further rises, the portion having the diameter D2 of the piston 32 is engaged with the extension portion side so that the connection between the first communication hole 32e and the second space portion 62 can be blocked. And the stepped portion 32b is formed.

In addition, hydraulic pressure supply means 70 for supplying water having a predetermined pressure, that is, hydraulic pressure, to elevate the valve member 50 and the piston 32 to the first space portion 61 and the third space portion 63. Is provided. The hydraulic pressure supply means 70 has a pump (not shown) for supplying water of a predetermined pressure to the hydraulic pressure supply passage 12a of the socket 12, and the outer circumferential surface of the sleeve member 40 or the main body ( 11) a second communication with the sleeve member 40 so as to be in communication with the first hydraulic passage 71 and the first hydraulic passage 71 and the third space portion 63 formed of a groove on at least one side of the inner circumferential surface; Ball 72. In addition, the first hydraulic pressure passage 71 is connected to the second hydraulic passage 74 and the second hydraulic passage on at least one side of the outer surface of the piston sleeve 32 or the inner circumferential surface of the main body 11. And a third communication hole 75 formed in the piston housing 32 so as to connect 72 and the first space part.

In the hydraulic pressure supply means, the second communication hole 72 need not be formed when the second space portion 63 and the housing portion 42 of the slave member 40 communicate with each other.

The bit unit 20 is installed at a lower end of the main body 11 to perform a drilling operation, and the color member 22 inserted into the main body 11 and the end of the color member 21 are caught. A bit 21 on which the 21a is slidably supported, a bit locker 23 inserted into the main body 11 to prevent the latching jaw 21a of the bit 21 from being separated, and the main The front locker 24 is fixed to the main body 11 and spline-coupled to the bit 21. The bit 21 is fixed to the main body 11 by the front rocker 24, the separation in the longitudinal direction by the locking jaw 21a and the bit rocker 23 is prevented. The bit unit is not limited to the above-described embodiments, and any of the bit units can be provided as long as the bit is slidably supported in the longitudinal direction and can be fixed in the rotation direction.

Referring to the operation of the punching machine according to the present invention configured as described above with reference to the drawings as follows.

First, in order to perform the drilling operation, the water hammer 10, that is, the coupling portion 12b of the socket 12 is coupled to the end of the drive rod unit 110 of the punching machine. In this state, the drive rod 3 is lowered, and high pressure water is supplied to the hydraulic pressure supply passage 12a through the drive rod 3 using a pump. As such, the water supplied through the hydraulic pressure supply passage 12a retracts the check valve member 13b elastically supported by the spring 13e of the check valve means 13 and the hollow portion 11a of the main body 11. Is supplied. The supplied water is first spaced through the first hydraulic passage 71, the second hydraulic passage 74, the second communication hole 72 and the third communication hole 75 of the hydraulic pressure supply means 70, respectively. The part 61 and the third space part 63 are supplied.

Therefore, since the cross-sectional area of the first blocking portion 51 is wider than that of the second blocking portion 53 in the longitudinal direction of the piston, the pressure difference acting on the valve member 50 is generated by the difference in the cross-sectional area, and thus the valve member. (50) is raised. At this time, since the first blocking portion 51 does not leave the pressing portion 32c of the piston 32, the pressure acting on the first space portion does not flow out. The piston 32 is raised by the pressure which acts on the side surface of the press part 32c of the piston 32, ie, the side surface of a piston longitudinal direction, among the pressures which act on this 1st space part 51. As shown in FIG.

As described above, when the piston 32 is raised to a predetermined height, the first blocking portion 51 is separated from the outer circumferential surface of the pressing portion 32c, and provides water to the first space portion 51. The hollow portion 32 is formed through the first communication hole 32e formed in the second space portion 52 and the piston 32 through a gap generated between the pressing portion 32c and the first blocking portion 51. To be discharged.

At this time, the first and second spaces communicate with each other to lower the pressure. At this time, the pressure acting on the valve member 50 is formed with the through hole 54 so as to reduce the cross-sectional area and the relative cross-sectional area of the second blocking portion 53. It acts on the extension 52, the valve member 50 is lowered because the second blocking portion 53 has a relatively large cross-sectional area. In this process, the first communication hole 32e is blocked by combining the diameter D2 portion of the terminal portion 32b with the extension portion.

Therefore, one closed space is formed in communication with the first and second spaces. In this state, since the diameter D1 of the guide part 32a side is formed larger than the diameter of the step part 32b side by the boundary of the press part 32c, the piston 32 presses the press part ( The pressure acting on the side of 32c becomes relatively large, causing the piston 32 to descend and to hit the bit 21.

As the piston 32 descends as described above, the air stored in the air storage unit 120 of the drive rod unit 110 is compressed as the water pressure for operating the hammer unit increases and the drilling depth of the ground deepens. Since the compressive force acts as an elastic force due to the lowering of the piston 32 when the piston 32 is lowered, it is possible to increase the striking force by the piston 32.

In particular, the pressure of the air stored in the air storage unit 120 of the drive rod unit 110 should be continuously connected to the drive rods as the depth of drilling perforated in the ground deepens, which is included in the empty space of the drive rod. When the inflated air flows along with the water when the inflow of water flows down, it flows into the inner tube 130 of the dry rod 120 adjacent to the cloth sharing knit and is discharged by the main body 112 and the inner tube 120 by the holes 137. The air flows out between the air and water by the specific gravity difference, and the separated air rises and is stored in the air storage chamber.

The air stored as described above has a deeper depth of the ground and a greater degree of compression as the water pressure increases. As the degree of compression increases, the pressure of the piston 32 according to the compressive force of the air when the piston 32 descends is increased. It can increase.

Therefore, it is possible to increase the impact force by providing an acceleration force to the piston lifted by the water.

As described above, it is possible to increase the impact force of the pit by providing acceleration force to the piston of the hammer operated by the water supplied to the drive rod of the puncher according to the present invention. In addition, a separate charging part for filling a gas such as nitrogen into the hydraulic hammer is unnecessary as in the related art, and as the depth of the perforation increases, the problem of filling the high pressure gas may be solved.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (4)

 The tubular body having a hollow part, A first coupling member installed at an upper portion of the main body and formed with an inlet for water; A second coupling member installed at a lower end of the main body and having an outlet through which water is discharged; The upper end is fixed to communicate with the inlet of the first coupling member, extending toward the second coupling member to partition the hollow portion of the body in the longitudinal direction to form an air storage portion and discharge the water radially to the end side and the water and Drive rod for a perforator, characterized in that it comprises an inner tube formed with at least one discharge hole for separating air. The method of claim 1, The end of the inner tube is coupled to the outlet of the second coupling member, the inner tube of the side adjacent to the second coupling member has a blocking plate to allow the water flowing through the inner tube to flow through the discharge hole Is installed, the lower side inner tube of the blocking plate drive rod for a perforator, characterized in that at least one inlet hole for introducing water discharged from the discharge hole into the outlet The method of claim 1, The end of the inner tube is provided with a blocking member so that water can be discharged through the discharge hole, the end of the inner tube is supported by at least one rib installed on the inner surface of the main body drive for drilling machine road. And a accumulator means for separating and storing air from water flowing into the hollow portion of the body and having a hollow portion.

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