KR101521637B1 - water pump apparatus for drilling machine - Google Patents

Abstract

A punching apparatus using a water pump according to the present invention comprises a punching machine body having a driving part, a head part having a driving shaft guided by a lead provided in the punching machine body and having a hollow part, An accumulator having drive rods provided with a water hammer for piercing at an end thereof and a gas storage portion provided between the drive rods and separated from the gas to be supplied as water; And a pumping unit for driving the water hammer by supplying the gas to the gas storage unit by pumping the gas piled up through the hollow of the drive shaft or the load of the drive rod.

Description

Technical Field [0001] The present invention relates to a water pump apparatus for drilling,

[0001] The present invention relates to a punching apparatus, and more particularly, to a punching apparatus for supplying water to a pneumatic separating unit by supplying water piled up to a drive rod provided with a water separating unit as an accumulator and a water pump, To a punching apparatus capable of driving a water pump.

Generally, a perforator for perforating the deep hole penetrating from the ground to the ground for drilling work, soil inspection, groundwater development, etc., includes a method of rotating a bit, and a method of rotating a bit or a ball cutter and hitting it.

Korean Patent No. 10-0372049 discloses an example of a perforator. The disclosed perforator has drive rods connected to each other in the longitudinal direction and an excavating unit connected to the drive rod at the end of the drive rods and having a hammer operated by hydraulic pressure.

 The perforator forms a separate hydraulic line in the drive rod to operate the hammer and rotate the excavating unit. Then, the fluid pumped by the pump, that is, water supplied to the excavating unit side through the drive rod is mixed with water and the excavated soil is discharged through the inner peripheral surface of the perforated hole and the outer peripheral surface of the drive rod.

In this process, when drilling a deep hole, a relatively high pressure water must be supplied to the bit. Therefore, a pump such as a flange pump or a piston pump, which is a reciprocating pump, is used as a pump for pumping the fluid.

The water supplied by such a reciprocating pump inevitably generates pulsating pressure. In addition, since the perforator operated by the fluid supplied in this way has a structure that periodically strikes the beat, pulsating pressure is also generated in the discharged water.

The pulsating pressure of such a fluid makes it difficult to continuously supply water as a fluid during perforation of the deep hole, and the operation of the excavating unit for drilling such as a water pump and the excavation of the excavated soil are difficult.

 In order to solve the above problems, a gas chamber of a back head is provided on the side of the upper end of the piston of the hammer, which is operated by the fluid supplied through the drive rods, and nitrogen gas is injected into the gas chamber of the back head, So that the impact force can be increased at the time of descending. When the back-end gas chamber is provided on the upper end side of the piston as described above, the gas filling pressure in the gas chamber has to be increased as the depth of the pore is deepened. That is, as the depth of the perforation deepens, the pressure of the underground water in the ground and the pressure of the fluid supplied from the pump become relatively high, so that the pressure of the back head gas chamber must be increased. When the pressure of the back-head gas chamber is not sufficiently increased, the penetration depth is deepened, and the hammering force of the hammer is suddenly reduced by the piston.

In consideration of this problem, a drill bit having a higher impact force of a bit by a hammer piston has been proposed. The perforator has a structure in which a spring is provided to be compressed when the piston is lifted and a striking force applied to the bit when the piston is lowered by the compression force of the spring is increased. However, as the penetration depth of the spring increases, the water pressure of the groundwater becomes higher as the depth of the penetration deepens, so that the impact force due to the elastic force of the spring also decreases.

Meanwhile, in the hammer operated as described above, water is discharged together with the earth and sand through the inner circumferential surface of the perforated hole and the outer circumferential surface of the drive rods to provide a striking force, and the pulsating pressure generated by the driving of the hammer instantaneously The other inertial force can not be increased in the flow, so that the discharge of water can not be performed smoothly. And the generation of the pulsating pressure of the discharged water continuously causes a relatively large impact to the pump and the apparatus for perforating so that the damage of the pump and the perforating apparatus is relatively large.

In order to solve the above-described problems, the present invention has been applied to an accumulator and a perforator using the same (Korean Patent No. 0624330). The posted accumulator has a chamber forming part in a selected one of the drive rods in which the hammer is installed, and has a configuration in which the air contained in the water is separated and positioned inside the chamber forming part.

In the accumulator having such a structure, as the depth of the perforation is deepened, the air in the chamber forming portion is compressed to be relatively small in volume, dissolved in water, and inflow amount of air through the drive rod is relatively small, . Particularly, as the depth of drilling becomes deeper, the hammer is driven and the pressure of discharged water or groundwater becomes higher, so that the function of the accumulator is further weakened.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a water hammer for a water hammer which is provided with a water pumped by a pumping unit by supplying air as a gas to a pumping unit for pumping water, And an object of the present invention is to provide a punching apparatus using a water pump capable of increasing the amount of gas wasted on a pipe.

Another object of the present invention is to separate a gas knitted in water by using an accumulator which is a water separation unit connected to a drive rod and to reduce the pulsation pressure of water generated in the operation of the water hammer by using the separated compressed gas, Which can improve the striking force of the water pump.

In order to accomplish the above object, the present invention provides a punching apparatus using a water pump, comprising: a punch main body having a driving part; a head part having a driving shaft guided by a lead provided in the punch main body and having a hollow shaft; An accumulator having drive rods which are lifted and raised like a head part and provided with a water hammer for piercing at an end thereof and a gas storage part which is provided between the drive rods and in which gas supplied as water is separated and stored; And a pumping unit connected to the rod for pumping the water to pump water pumped through the hollow of the drive shaft or the rod of the drive rod to drive the water hammer and supply the gas to the gas storage unit It is characterized by.

According to the present invention, the accumulator includes a first tubular body having a hollow portion, a first engaging member provided at an upper portion of the first body and having an inlet for water, and a second engaging member provided at a lower end of the first body, And a gas storage portion is formed by dividing the hollow portion of the first main body in the longitudinal direction and extending to the side of the second engagement member to form a gas storage portion, And at least one exhaust hole for separating water and air by discharging water in a radial direction.

Wherein an end of the first inner pipe is coupled to an outlet of the second engagement member and water flowing through the first inner pipe is discharged to the first inner pipe adjacent to the second engagement member through the discharge hole And at least one inflow hole for introducing the water discharged from the discharge hole to the outflow port is formed in the first inner pipe at the lower side of the blocking member.

The pumping unit includes a cylinder portion, a pump housing communicating with the cylinder portion and including a first suction portion and a first discharge portion, a piston reciprocably installed in the cylinder portion to suck and discharge water, A first check valve installed in the suction part and opened when the piston is retracted and closed when the piston is retracted; a second check valve provided in the first discharge part and opened when the piston is advanced and closed when retreating; And a gas supply portion for supplying gas to the auxiliary cylinder portion to slip the gas into water pumped by the gas supply portion.

The pump housing further includes an auxiliary cylinder portion communicating with the cylinder portion. The gas supply portion includes a gas supply portion communicating with the auxiliary cylinder portion of the pump housing, and a gas supply portion provided in the gas supply portion, And a third check valve which is closed when the water is discharged.

The punching apparatus using the water pump of the present invention can supply water to which the air as a base is pumped to the accumulator connected to the drive rod through the drive rod, so that the pressure increases due to the piercing depth. Thus, the pulsation due to the driving of the water hammer, The gas supply amount in the accumulator, that is, the pressure of the gas, can be increased.

1 is a side view of a perforating apparatus according to the present invention,
FIG. 2 is a side cross-sectional view illustrating a main part of a perforating apparatus according to the present invention,
Figure 3 is an exploded perspective view of the accumulator shown in Figure 2,
Figure 4 is a cross-sectional view of the accumulator shown in Figure 3,
5 is a cross-sectional view of a pumping unit according to the present invention,
FIG. 6 is an enlarged cross-sectional view showing the check valve shown in FIG. 5; FIG.

The present invention relates to a punching apparatus using a water pump for drilling a deep hole in a ground, and an embodiment of the punching apparatus is shown in Figs. 1 to 6.

Referring to the drawings, a water pump apparatus 10 for a perforator of a water pump according to the present invention includes a drive shaft 14 (not shown) formed with a hollow (not shown) and guided by a lid 12 supported by a drill body 11 having a drive unit (Not shown). The drive shaft 14 of the head part 15 is driven by a hydraulic motor installed in the head part 15. [ The drive shaft 20 of the head portion 15 is connected to the upper end of the drive rods 20, which are connected to each other in the longitudinal direction. A water hammer 30 driven by a fluid supplied through the rod 21 of the drive rods 20 connected to each other is installed on the lower end side of the drive rod 20 connected to each other in the longitudinal direction. The water hammer 30 is provided between the drive rod 20 and the drive rod 20 and between the water hammer 30 and the water hammer 30. The water hammer 30 functions as a drive rod 20, And an accumulator 40 for reducing a load acting on the water hammer 30 due to the water pressure of groundwater as the depth of the hole to be drilled becomes deeper and the impact force is prevented from being lowered. A plurality of accumulators 40 may be provided between the drive rods 20 or between the drive rods 20 and the water hammer.

The punching apparatus according to the present invention includes a pumping unit (not shown) for pumping gas, that is, air pumped, through the hollow of the drive shaft 14 of the head 15 or the rod 21 of the drive rod 20 (70).

2, 3 and 4, the accumulator 40 is connected to the drive rod 20 to serve as a drive rod 20 and to absorb pulsating pressure. The accumulator 40 is connected to the punching unit 10, A first main body 42 having a tubular shape and having a hollow portion 41 and a second main body 42 fixedly formed on the first main body 42 to form a first inlet 43a of water, A second engaging member 44 provided at a lower end of the first main body 42 and having a first outlet 44a through which water flows out; And a first inner pipe 46 having an upper end fixed to the first main body 42 and dividing the first main body 42 in the longitudinal direction to form a gas storage part 45 and forming a supply passage for water. The water supply passage of the first internal pipe 46 is connected to the water hammer 30 by supplying water supplied through the rod hollow portion 21 of the drive rod 20 to the side of the rod of the drive rod or the water hammer 30 .

The first inner pipe 46 located in the hollow portion 41 of the first main body 42 has a diameter smaller than the diameter of the hollow portion 41 of the first main body 42, The gas storage portion 45 is formed by partitioning the hollow portion 41 by being engaged with the first inlet 43a of the first engagement member 43. [ The lower end of the fixed first inner pipe 46 is separated from the water supplied through the first inner pipe 46 and stored in the gas storage unit 45, Respectively. The water separator 50 is provided with a blocking member 51 for blocking water flowing through the first inner pipe 46 at the end shaft of the first inner pipe 46, The water flowing through the first inner pipe 46 is supplied to the upper portion of the first inner pipe 46 in the radial direction corresponding to the gas storage portion 45, And an outlet hole 52 for discharging water between the inner circumferential surface of the main body 42 and the gas contained in the water to be separated and stored in the gas storage 45 is formed, An inflow hole 53 for discharging the water supplied from the outflow hole 52 to the gas reservoir 45 toward the first outlet 44a is formed in the first internal pipe 46 of the first internal pipe 46. [

The water separator is not shown in the drawing, but an end of the first pipe member 46 is cut off and an outlet port for feeding the water supplied to the outer circumferential surface of the first pipe member 46 outwardly through the first pipe member 46, .

In the accumulator 40, a tapered male screw portion is formed at an end of the first engagement member 43, that is, an outer peripheral surface exposed from the first body, A tapered female threaded portion is formed on the inner circumferential surface of the drive shaft so that the first coupling member of the drive rod is coupled. The accumulator 40 is not limited to the above-described embodiment, and it may be constructed in such a manner that the accumulator gas is separated and stored, and the pressure of the stored gas is supplied to the water or the water hammer 30 Any structure can be applied.

5, the pumping unit 70 is connected to the drive shaft 14 or the drive rod 20 of the head unit 15, and the pumping unit 70 is connected to the load rod 21 of the drive rod 20, A pump housing 75 having a cylinder 71 and a first suction portion 72 and a first discharge portion 73 communicating with the cylinder portion 71; A piston 76 installed to be reciprocable on the cylinder part 71 to suck and discharge water and a piston driving part 90 for moving the piston 74 forward and backward in the cylinder part 71. The pump housing may be provided with a plurality of pistons and cylinder portions.

The piston driving unit 90 includes a crankshaft driven by an engine or a motor, and a connecting rod connecting the crankshaft and the piston to convert the rotational force of the crankshaft into a linear reciprocating motion.

The first suction portion 72 is provided with a first check valve 77 that is opened when the piston is retracted and closed when the piston is retracted. The first check valve 77 is provided in the first discharge portion 73 to open when the piston 76 is advanced, A second check valve 78 is provided. The pump housing 75 is provided with a gas supply unit 85 for supplying gas to the auxiliary cylinder unit 80 to shift the gas into the water pumped by the cylinder unit 71 and the piston 76. The auxiliary cylinder part 80 provided in the pump housing 75 is preferably communicated with the cylinder part 71 and extends in the upper direction of the cylinder part 71. The first suction part 72 are preferably installed in the lower pump housing 75 of the auxiliary cylinder portion 80 and the first discharge portion 73 is provided on the upper pump housing 75 of the auxiliary cylinder portion 80 extending to the upper side ). This is to prevent the gas supplied through the gas supply part 85 from flowing into the cylinder part 71 for compression.

The volume of the auxiliary cylinder part 80 is preferably greater than or equal to the volume of water pumped by the cylinder part and the piston.

  The gas supply unit 85 is provided with a third check valve 86 for preventing water from flowing backward through the gas supply unit when the piston reciprocating in the cylinder unit 71 advances. The gas supply unit 85 is connected to the air compressor 100 (see FIG. 1) for compressing air, which is a base gas, by the air compressor and the gas supply pipe 110, and is continuously supplied with gas.

The first suction portion 72 of the pumping unit 70 is connected to the water tank and the water supply pipe 72a so as to be continuously supplied with water. Is connected to the rotary joint provided on the drive shaft 14 of the head portion 15 by the coupling tube 73a. The water discharged through the first discharge portion 73 is supplied to the rod middle portion 21 of the drive rod 20 through the hollow of the drive shaft 14 in a state in which air as a base is piled up.

5 and 6, the first check valve 77 includes a valve housing 77b provided with a valve seat portion 77a provided in the first suction portion 72 of the pump housing, A valve member 77c slidably installed in the valve seat 77b and interposed between the valve member 77c and the valve housing 77b to intermittently supply water to be in contact with the valve seat 77a, 77c elastically bias the piston 76 in the closing direction when the piston 76 moves along the cylinder portion 71. [ The second and third check valves 78 and 86 are substantially similar in construction to the first check valve 77 and the second and third check valves 78 and 86 are closed Direction may be changed depending on the operating state of the reciprocating piston 76 along the cylinder portion 71 as described above.

The operation of the punching apparatus using the water hammer according to the present invention constructed as described above will be described with reference to the drawings.

First, in order to perform the drilling operation, the drive rods 20 of the drilling machine are combined and the accumulator 40 is installed between the drive rod 20 and the water hammer 30 having the bit. A plurality of accumulators 40 may be installed between the drive rods 20 in accordance with the depth of the drilled holes.

 In this state, the head portion 15 slidably mounted on the lead is lowered so that the drive rod 20, which is coupled to the drive shaft 14 of the head portion 15 and provided with the water hammer 30 at its end, descends and rotates, Perform the operation. The pumping unit 70 supplies the high pressure water piled up by the air which is the gas through the hollow of the driving shaft 14 and the rod hollow portion 21 of the drive rods 20. [ The water supplied through the hollow portion 21 of the drive rod 20 flows through the first inner tube portion 46 of the accumulator 40 and then flows into the outlet hole 52 by the blocking member 51 provided at the end portion. To the gas storage portion 45 side. In this process, the air sucked in the water is moved to the upper side of the gas storage part 45 by the difference in specific gravity, and is stored in the gas storage part 45. The separated water is discharged through the outflow hole 53. The discharged water is supplied to the water hammer 30 through the rod 21 of the drive rod 20 or directly to the water hammer 30 30 to drive the water hammer 30 to strike the bit to puncture the ground.

As described above, the air stored in the accumulator 40 is supplied separately from the water for driving the water hammer 30 as described above. As the depth of the perforated hole becomes deeper, the water pressure of the ground water or the operation of the water hammer 30 Can be reduced. As the degree of compressive compression of the air in the accumulator 40 increases, the pressure of the compressed air acts on the piston of the water hammer when the bit of the water hammer 30 hits the piston of the water hammer 30, so that the hitting force can be increased.

Particularly, as shown in FIG. 2, the water operated by the water hammer 30 is discharged and discharged to the ground through the hole drilled by the water hammer 30. At this time, the discharge of the fluid due to the operation of the piston of the water hammer The pulse pressure is generated. The pulsating pressure thus generated can be absorbed by the accumulator 40 as described above. That is, the pulsation pressure acting on the water discharged through the perforated hole 200 is supplied to the gas storage part 45 through the outflow hole 52 and the outflow hole 53, so that the stored air is compressed and absorbed And the absorbed pressure is discharged when the pressure in the perforated hole 200 becomes relatively low. Therefore, the water discharged through the perforated hole 200 can be continuously discharged without generating a pulsating pressure.

In particular, as the piercing depth increases, the air stored in the gas reservoir 45 is subjected to a relatively high pressure, but because the pumped water by the pumping unit 70 contains a lot of compressed air, The gas storage section 45 can be constantly filled with air even if it is melted.

As described above, the punching apparatus using the water hammer according to the present invention can increase the striking force of the bit by providing an acceleration force to the piston of the water hammer operated by the water supplied to the drive rod. Also, it is possible to fundamentally solve the problem of filling the hydraulic hammer with a high-pressure gas as the conventional method does not require a charging part for charging a gas such as nitrogen.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention.

Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

Claims (5)

A head unit including a driving shaft which is guided by a lead provided in the perforator main body and has a hollow and a driving shaft which is coupled to the driving shaft of the head unit and which is lifted and raised like a head unit and equipped with a water hammer An accumulator having rods and a gas reservoir disposed between the drive rods and separated from the gas to be supplied as water; and an accumulator connected to the drive shaft or the drive rod, And a pumping unit for pumping the water piled on the rod through the rod in order to drive the water hammer and supply the gas to the gas storage,
Wherein the pumping unit includes a cylinder portion, a pump housing communicating with the cylinder portion and including a first suction portion and a first discharge portion, a piston reciprocably installed in the cylinder portion to suction and discharge water, And a second check valve installed in the first discharge portion and opened when the piston is advanced and closed when the piston is retracted. The first check valve is disposed in the cylinder portion and the piston, And a gas supply unit for supplying a gas to the auxiliary cylinder unit to move the gas into the water pumped by the pumping unit. The method according to claim 1,
The accumulator includes a tubular first body having a hollow portion,
A second engaging member provided at an upper portion of the first main body and provided with an inlet for water, a second engaging member provided at a lower end of the first main body and having an outlet through which water flows, At least one upper end portion fixed to the upper end portion and extending toward the second engagement member to divide the hollow portion of the first body in the longitudinal direction to form a gas storage portion and at least one end portion to discharge water in a radial direction, And a first inner tube having a discharge hole formed therein. 3. The method of claim 2,
The end of the first inner pipe is coupled to the outlet of the second coupling member, and water flowing through the first inner pipe is discharged to the first inner pipe adjacent to the second coupling member through the discharge hole Wherein at least one inflow hole for introducing water discharged from the discharge hole into the outflow port is formed in the first inner pipe at the lower side of the blocking member. delete The method according to claim 1,
The pump housing further includes an auxiliary cylinder portion communicating with the cylinder portion. The gas supply portion includes a gas supply portion communicating with the auxiliary cylinder portion of the pump housing, and a gas supply portion provided at the gas supply portion, Wherein the third check valve is closed when the water is discharged.

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