KR100751734B1 - An boring apparatus for cyclone of a fluidized reduction furnace - Google Patents

Abstract

A cyclones boring apparatus of a fluidized reduction furnace is provided to improve the efficiency of a boring operation by possible to perform a general optional boring operation correspondingly to a plurality of the cyclones of the fluidized reduction furnace respectively, and improve easiness, safety and efficiency of the boring operation by possible for a remote control system to conduct the boring operation. An apparatus(100) for boring cyclones of a fluidized reduction furnace comprises: a base frame(110) installed at an upper side of the cyclones of the fluidized reduction furnace; a rotary frame(120) rotatably mounted on the base frame; an arm frame(130) installed on the rotary frame in a cantilever structure such that the arm frame is indexed in such a state that the position of the arm frame can be optionally aligned with one of the plurality of the cyclones by the rotational motion; a supporting frame(150) rotatably installed on a front portion of the arm frame such that the position of the supporting frame can be aligned on a central axis line of a cyclone pipeline; a mast frame(160) straightly reciprocated on the supporting frame and advanced or retreated relative to the cyclone pipeline such that the position of the mast frame can be aligned; a drive part(170) which is straightly reciprocated on the mast frame, and has a hammer(171) for an excavator, a hammer drill rod(172), and an engine part for driving the hammer and the hammer drill rod; and a boring bit(200) installed on a front portion of the hammer drill rod and rotated and thrust to crush a dust layer accumulated on an inner part of the cyclone pipeline.

Description

Cyclone boring device of the fluid reduction path {AN BORING APPARATUS FOR CYCLONE OF A FLUIDIZED REDUCTION FURNACE}

1 is a configuration diagram schematically showing an example of a melt reduction facility for steelmaking;

Figure 2 is a schematic diagram schematically showing the cyclone clogging state and the boring operation process provided in the flow reduction path of the conventional melt reduction equipment,

Figure 3 is a schematic diagram showing an installation state of the flow reduction cyclone boring device according to the present invention,

4 is a schematic configuration diagram showing a cyclone boring device for a fluid flow path according to the present invention;

5 and 6 are a schematic side view and a plan view of the rotating frame and the support frame shown in Figure 4, respectively;

7 and 8 are a schematic side view and a plan view of the mast frame and the drive unit shown in FIG. 4, respectively;

9 to 11 are schematic configuration diagrams respectively shown by extracting the hammer drill rod detachable unit in Figure 8,

12 to 14 are schematic configuration diagrams showing the bit holder unit in Figures 4 and 8, respectively.

Figure 15 is a schematic configuration diagram showing the extraction of the boring bit employed in the cyclone cyclone boring apparatus according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10.Curve flow path 11 ... cyclone

100 ... Cyclo Boring Device for Flow Reduction Furnace 101 ... Frame Member

110 ... base frame 111 ... ring gear

120 ... rotating frame 130 ... arm frame

131 Actuator cylinder 140 Rotating frame

150 ... support frame 160 ... mast frame

170 Drive part 171 Excavator hammer

170E ... hammer engine part for excavator 171H ... hammer head part for excavator

171F ... Slide Frame 172 ... Hammer Drill Rod

172a ... N2 gas blowing pipe 172b ... Heavy part

173 ... dust suction pipe 180 ... hammer drill rod detachable unit

181, 182 Arm bracket 183 Shaft

190 ... Bit Holder Unit 191 ... Turn Holder

Fixed holder 193 Stopper holder

The present invention relates to a boring device of a dust exhaust pipe for expanding the exhaust pipe dust clogging state of a large-scale plant type dust collector, and more specifically, various furnaces (furnace) used as steelmaking facilities The present invention relates to a dust collecting exhaust pipe boring device, and to a cyclone boring device for a fluid reduction furnace used as a molten reduction facility in a steelmaking process using ferrous iron ore as a main raw material.

As is well known, the COREX process is well known as a steelmaking process technology that overcomes the disadvantages of the blast furnace method, which is widely known as a typical steelmaking process in which iron ore and coke are charged into a furnace to produce molten iron. .

However, the Corex process can omit the sintering and coke process of the blast furnace method, but it has disadvantages such as the need to use expensive ore iron ore and coal, and to deal with coal dust generated during the process.

Recently, the FINEX process, which is developed as an advanced steelmaking process technology capable of overcoming the disadvantages of the existing steelmaking process as described above and commercialized, has been introduced.

The above FINEX process technology has abundant reserves, so it is possible to produce wastewater by directly using cheap powdered iron ore (Non-Cock or Non-Cocking Coal) without processing. It is emerging as an eco-friendly steelmaking process that can drastically reduce the emission of pollutants and pollutants.

FIG. 1 schematically illustrates a melt reduction facility used in a Finex process technology. Referring to this, a ferrite ore (1) is provided through a plurality of flow reduction reactors 10 that perform functions such as a preheating furnace and a preliminary reduction furnace. ) Is converted into hot compacted iron 3 and charged into the melting furnace 20 together with the raw coal 2 to produce molten iron.

However, in the Finex process as described above, as the main raw material is a powdered iron ore having a particle size of 8 mm or less as a main raw material, dust (D; dust) rising during the reduction process of iron ore is schematically shown in FIG. 2. The phenomenon of causing the closed state of the pipeline to occur by gradually accumulating and fixed to the pipeline of the cyclone 11 provided in the flow reduction path (10).

Conventionally, as an example of a boring operation process for penetrating through the dust blocked state in the pipeline of the cyclone 11 of the flow reduction path 10, the operation of the flow reduction path 10 as shown in FIG. After stopping and cooling for a period of time, boring by alternately inserting the bit 32 installed in the hammer drill rod 31 of the excavator 30 at the upper and lower parts of the cyclone 11 in the conduit, for example. To perform the work, or in addition to the boring work depending on the manual work of the operator using a variety of tools.

However, the cyclone boring operation of the conventional flow reduction reactor as described above is safe due to the poor working environment due to the dust emitted during the boring operation while the hot heat is released even after the cooling process following the operation of the flow reduction reactor. As a result, the working efficiency is significantly lowered, and the boring work inside the cyclone pipeline is insufficient, and the cycle of closing the dust due to dust collection is gradually shortened, leading to a decrease in the operation rate and productivity of the melt reduction facility. I have a problem that works.

The present invention was made in view of the problems with the above-described cyclone boring method and boring device of the conventional flow reduction path, the object of the present invention is to correspond to each of the plurality of cyclones of the flow reduction path The purpose of the present invention is to provide a cyclone boring device for a flow reduction path, which can greatly improve the efficiency of boring work as the selective boring work can be universally used.

Another object of the present invention is to provide a cyclone boring device of a flow reduction path improved to be able to greatly improve the ease, safety and efficiency of the boring work by minimizing downtime as the boring work can be performed by a remote control system It is to.

In order to achieve the above objects, the cyclone boring device of the fluid reduction path according to the present invention is a dust layer which is gradually collected in a plurality of cyclone pipes provided in the fluid reduction path of the melt reduction facility to cause a closed state. A cyclone boring apparatus for a fluid reduction path for crushing and penetrating a gas, comprising: a base frame installed to be located above a cyclone of the fluid reduction path; A rotating frame mounted on the base frame and installed in a state capable of rotating movement; An arm frame which is installed in a cantilever structure in the rotatable frame such that the rotatable frame is indexed in a state capable of selectively positioning with any one of the plurality of cyclones by a rotational movement of the rotatable frame; A support frame rotatably installed at a distal end of the arm frame to be aligned on a central axis of the cyclone pipeline; A mast frame which is installed in the support frame so as to be linearly reciprocated so as to be aligned with the cyclone conduit; A driving part having a hammer drill rod which is connected to an excavator hammer installed in the mast frame and rotates; And a boring bit installed at the tip of the hammer drill rod of the driving part to crush and penetrate the dust layer integrated in the cyclone pipe while rotating and thrust driving.

In the cyclone boring device of the flow reduction path according to the present invention having the configuration as described above, the front end portion of the arm frame is provided with a rotation frame installed to rotate by driving the actuator cylinder, the fixed end of the rotation frame The hinge is supported by the hinge structure at the distal end of the arm frame and is installed to rotate while the free end is connected to the piston rod of the actuator cylinder and is installed to pivot as it is constrained by its forward and backward movement. Preferably, the support frame and the mast frame are sequentially installed to be rotatable.

According to the present invention, the mast frame is preferably further provided with a hammer drill rod detachment unit for detachment of the hammer drill rod.

According to one aspect of the invention, the hammer drill rod detachable unit, a pair of arm brackets rotatably installed at both ends of one side of the mast frame, and the shaft is connected to support each arm bracket coaxially interlocked and installed And a pair of arm brackets each having an arm plate having a plurality of support holes for supporting both ends of the hammer drill rod, and aligned with the head portion of the excavator hammer by the rotation of the arm plate. It is configured to be detachable of the hammer drill rod.

According to the present invention, it is preferable that the mast frame further includes a bit holder unit for clamping the boring bit when the hammer drill rod is attached and detached.

According to one aspect of the invention, the bit holder unit includes a turn holder and a fixed holder and a stopper holder for preventing the fall when the boring bit is attached and detached arranged up and down side by side, the turn holder is a pair of first installed on the holder bracket A clamper installed to rotate by selective driving of one cylinder, and a pair of second cylinders for proximate / separating the clamper to selectively grip the hammer drill rod, wherein the fixing holder is mounted to the holder bracket. A clamper driven to be proximal / separated by the pair of cylinders is configured to selectively grip the hammer drill rod. The stopper holder is configured to include a pair of stopper members which are centered to narrow or widen the interval formed between each other by vertically rotating by a pair of stopper cylinders mounted on the holder frame.

According to the present invention, the boring bit is a conical machined head portion at one end of the cylindrical flange connected to the hammer drill rod, and a plurality of tip support portions protruding so as to be arranged at an equal arrangement angle to the head portion; It is preferable that the tip support portion is configured to include a plurality of carbide tool tips.

Hereinafter, with reference to the accompanying drawings will be described in detail the cyclone boring device of the flow reduction path according to a preferred embodiment of the present invention.

3 and 4, the cyclone boring device 100 of the flow reduction path according to the present invention is installed in a state mounted on the frame member 101 is installed as a peripheral facility of the flow reduction path 10, A base frame 110, a rotation frame 120, and an arm frame 130 are provided for skeletal formation and maintenance of the overall device configuration.

The base frame 110 is installed on the frame member 101 to be located above the cyclone 11 of the flow reduction path 10. In addition, the rotation frame 110 is installed to be supported in a state capable of rotational movement by the ring gear 111 installed on the base frame 110, the arm frame 130 is mounted in a cantilever structure on the rotation frame 120. It is installed as possible.

Accordingly, the arm frame 130 is indexed to allow selective position alignment with any one of the plurality of cyclones 11 provided in the flow reduction path 10 by the rotational movement of the rotation frame 120. ) Rotationally controlled. Therefore, according to one aspect of the present invention, the rotary frame 120 may be an index rotary table may be employed.

On the other hand, the front end of the arm frame 130 is provided with a rotation frame 140 installed to rotate by the actuator cylinder 131 driven by the operation of the controller (C2).

The fixed end of the rotating frame 140 is installed to be rotatably supported by the hinge structure (h) to the front end of the arm frame 130, the free end is connected to the piston rod of the actuator cylinder 131 As it is restrained by the forward and backward movement, it is installed to swing.

In addition, the support frame 150 and the mast frame 160 are sequentially installed and supported in the rotation frame 140 so as to be rotatable in cooperation with each other.

According to the configuration as described above, the rotation frame 140, the support frame 150 and the mast frame 160 is set to a horizontal position with respect to the base frame 110 ("A" in Fig. 3) Position posture) and the movement of the posture set to form a vertical state with respect to the base frame 110 ("B" position posture of FIG.

For example, the support frame 150 and the mast frame 160 may be formed of a steel frame structure having a beam shape.

As shown in FIGS. 5 and 6, the support frame 150 and the mast frame 160 are provided with a pair of actuator cylinders 151 and 161 side by side. The piston rods of the pair of actuator cylinders 151 and 161 are installed to correspond to the mast frame 160 and the support frame 150, respectively.

Therefore, the mast frame 160 is driven by sliding a predetermined section along guide rails (not shown) provided on both sides of the support frame 150 by driving control of the pair of actuator cylinders 151 and 161. The reciprocating movement is made possible.

According to the configuration as described above, the support frame 150 and the mast frame 160 by the rotational movement of the rotation frame 140, the center of the pipeline of any one cyclone 11 of the flow reduction path (10) It is possible to selectively position alignment so that it is substantially perpendicular to the axis. Cyclone of the flow reduction path 10 as the mast frame 150 performs the lifting and lowering movement by sliding by the drive control of the pair of actuator cylinders 151 and 161 in the position alignment state as described above. Proximity or separation of the pipeline inlet of 11) initiates setting of the boring work ready position or release state.

On the other hand, according to the present invention, the mast frame 160 is provided with a driving unit 170 including a hammer (aka DOWN THE HOLE DRILL) 171 and a hammer drill rod 172 is installed, the hammer drill rod Boring bit 200 for boring is mounted at the end of the (172).

The excavator hammer 171 is employed, for example, in a conventional excavator or drilling machine, and generates rotation and thrust by driving the hydraulic engine unit 171E by operating the main controller C1, for example. By generating an inertia force by a cylinder (not shown), the boring bit 200 installed in the lower end of the said hammer drill rod 172 is inserted in the pipeline of the cyclone 11 of the flow reduction path 10, While driving the rotation and thrust is driven to break through the dust layer accumulated in the pipeline.

7 and 8 are schematically shown by extracting the mast frame 160 and the driving unit 170, referring to this, the excavator hammer 171 is mounted on the slide frame 171F and the sprocket S And linearly reciprocating (lifting) along the mast frame 160 by driving the chain C, thereby moving the hammer drill rod 172 and the boring bit 200 into the cyclone conduit of the flow reduction path. do.

The hammer drill rod 172 has a hollow rod structure having a predetermined unit length, and as shown in FIG. 4, a plurality of nitrogens (N ₂₎ formed in a small hole shape along a length direction in a body thereof. ) Has a gas intake pipe (172a), the hollow portion 172b is installed to communicate with the dust suction pipe (173).

In addition, the hammer drill rod 172 is connected so that one end is chucked to the head portion 171H of the excavator hammer 171 and the other end is connected to support the boring bit 200.

In addition, the hammer drill rod 172 is as shown in Figure 8 so that a plurality of unit units are additionally connected between the excavator hammer 171 and the boring bit 200 according to the cyclone pipe length and excavation depth. Through the operation control of the hammer drill rod detachment unit 180 provided in the mast frame 160, for example, it is installed in a detachable state by screwing, etc. of the flange (not shown).

Referring to FIG. 9, the hammer drill rod detachment unit 180 is a pair of arm brackets 181 rotatably installed by driving a cylinder (not shown) provided at both ends of the mast frame 160 ( 182 and a shaft 183 connected to be coaxially supported and interlocked with each other.

The pair of arm brackets 181 and 182 respectively support a plurality of support holes for supporting both ends of the hammer drill rod 172 on the arm plates 181a and 182a, respectively, as shown in FIGS. 10 and 11. 181b and 182b.

Therefore, the hammer drill rod 172 is loaded with a plurality of preliminarily arranged around the shaft 183 so that both ends thereof are supported in the support holes 181b and 182b, respectively.

The support hole 182b provided in the arm plate 182a of the arm bracket 182 is detached from the hammer drill rod 172 as one side thereof is opened to allow free access of the hammer drill rod 172 as shown in FIG. 11C. This becomes possible.

Therefore, when any one of the hammer drill rod 172 is positioned to be coaxially aligned with the head portion 171H of the excavator hammer 171 by the rotation of the arm plate (181a) (182a), for the excavator By using the rotational force of the hammer 171 is coupled to the head portion 171H or coupled to another hammer drill rod 172 that is previously coupled.

According to one aspect of the present invention, the mast frame 160 is provided with a bit holder unit 190 for clamping the boring bit 200 when the hammer drill rod 172 is attached and detached.

12 to 14, the bit holder unit 190 includes a turn holder 191, a fixed holder 192, and a stopper holder 193 for preventing falling when the boring bit is attached and detached, arranged up and down side by side. .

As shown in FIG. 13, the turn holder 191 includes a clamper 191c installed to rotate by selective driving of a pair of first cylinders (turn cylinders) 191b installed on the holder bracket 191a, and a boring bit. And a pair of second cylinders (clamper cylinders) 191d for driving the clamper 191c to approach or space apart to selectively hold the 200.

Accordingly, the turn holder 191 is capable of rotating in order to position the gripper for the hammer drill rod 172 or to perform the detachment operation.

As shown in FIG. 14, the clamp holder 192c may be driven by a pair of cylinders 192b installed in the holder bracket 192a to selectively receive the boring bit 200. Configured to grip.

As shown in FIG. 12, the stopper holder 193 is rotated up and down by a pair of stopper cylinders 193a mounted on the holder frame 190F, respectively, so that the stopper holder 193 is centered so as to narrow or widen the space formed therebetween. And a stopper member 193b.

Accordingly, the stopper member 193b of the stopper holder 193 is a hammer drill rod 172 when the hammer drill rod 172 is attached or detached by the expansion or contraction operation of the gap by the drive control of the stopper cylinder 193a. And the safety device capable of preventing the falling of the boring bit 200.

Meanwhile, referring to FIG. 15, the boring bit 200 has a head portion 220 which is processed in a conical shape at one end of the cylindrical flange 210 connected to the hammer drill rod 172 as shown. The head part 220 is provided with a plurality of tip support parts 221 formed to be processed to be arranged at an equal arrangement angle, and the tip support parts 221 are provided with a plurality of carbide tool tips T. Here, reference numeral 201 of FIG. 15 denotes a dust suction hole formed to communicate with a hollow portion of the hammer drill rod 172 to suck out the crushed dust, and 203 denotes a hammer drill rod 172 to be blown when the dust is crushed. It shows the N2 gas blowing hole formed to communicate with the N2 gas blowing pipe formed in the body.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the flow reduction cyclone boring device according to the present invention having the configuration as described above in detail.

First, according to the start of the operating operation by the operation of the control panel (C1) (C2) of the flow reduction path cyclone boring device 100 according to the present invention by the rotation of the rotation frame 140 by the support frame 140 ) And the mast frame 150 is set to allow selective positioning on the cyclone pipeline central axis of any one of the plurality of cyclones 11 of the flow reduction path (10).

That is, it is set to the operation preparation posture of the vertical state indicated by "B" in the operation stop position of the horizontal state indicated by "A" in FIG. As the mast frame 150 is controlled to move in a straight reciprocating state in such a setting state, the hammer drill rod 172 and the boring bit 200 are aligned with respect to the pipeline of the cyclone 11 of the flow reduction path 10. Initialization operation is made to the state of possible retreat movement.

In the state of the initialization operation as described above, the hammer drill by the rotary thrust and the force of the excavator hammer 171 in accordance with the drive control of the drive unit 170, similar to the conventional hammer drill rod driving mechanism of the excavator The boring bit 200 installed at the lower end of the rod 172 is inserted into the conduit of the cyclone 11 of the flow reduction path 10 to rotate and thrust to drive the cemented carbide tip T of the boring bit 200. The dust layer accumulated inside is crushed. At this time, nitrogen (N ₂ ) gas is blown in through the nitrogen (N ₂ ) gas inlet pipe 172a of the hammer drill rod 172, and the crushed dust forms the hollow part 172b and the dust suction pipe 173. It is sucked to the outside and erased.

Subsequently, when the crushing operation of the dust layer is completed to a certain depth in the pipeline of the cyclone 11, the excavator hammer 171 is raised according to the driving control of the driving unit 170, and then the mast frame 160 is provided. Through the operation control of the hammer drill rod detachment unit 180 is connected to another hammer drill rod that is preloaded to extend the overall length.

That is, when any one of the hammer drill rod 172 is positioned to be coaxially aligned with the head portion 171H of the excavator hammer 171 by the rotation of the arm plate (181a, 182a), the excavator It is coupled to be further connected to the other hammer drill rod 172 that is previously coupled to the head portion 171H of the hammer 171. In this case, the boring bit 200 is gripped by the turn holder 191 of the bit holder unit 190 and the clampers 191c and 9192c of the fixed holder 192, and the turn holder 191 is a boring bit ( As the drive is controlled to rotate in the state of holding 200, the position is moved to secure the mounting space and the position of the hammer drill rod 172. At this time, the stopper member 193b of the stopper holder 193 is connected to the boring bit 200 when the hammer drill rod or the boring bit is detached or replaced by the reduction operation of the gap by the drive control of the stopper cylinder 193a. It will function as a safety device to prevent falling.

Through the operation process as described above it can be carried out by remotely controlling the crushing of the dust layer to the lower end of the pipeline of the cyclone 11 of the fluidization reactor (10).

Therefore, according to the cyclone boring device 100 of the flow reduction path according to the present invention, when the first cyclone boring operation is completed, it is set to the operation stop position of the horizontal state indicated by "A" in FIG.

Subsequently, the support frame 140 and the mast frame 150 are selectively aligned on the central axis of the second cyclone pipeline by the rotational movement of the rotation frame 140. Initial position is set to the ready position of the vertical state indicated by. Then, the second cyclone boring operation can be continuously performed through the operation process as described above.

In other words, the cyclone boring device 100 of the flow reduction path according to the present invention is capable of universally selective boring operation corresponding to each of the plurality of cyclones by remote control even in a state of minimizing downtime.

As described above, although the present invention has been described with reference to the embodiment of the fluid reduction path cyclone boring device of the melt reduction facility, on the other hand, for example, various furnaces used as steelmaking or steelmaking facilities; Furnace) dust collection boring device as well as can be effectively applied to the boring device of the dust collector exhaust pipe for the exhaust pipe clogging state of large-scale plant type dust collector.

As described above, according to the blast furnace cyclone boring apparatus according to the present invention, the boring cyclone boring device according to the present invention is capable of greatly improving the efficiency of the boring work, as the universal boring operation is possible in response to the plurality of cyclones of the flow reduction reactor. You get an effect. In addition, the boring operation can be performed by the remote control system, thereby minimizing downtime, thereby greatly improving the ease of boring operation, safety and efficiency.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes are intended to fall within the scope of the claims set forth.

Claims (8)

In the cyclone boring device of the flow reduction path for crushing and penetrating through the dust layer that is gradually collected by a plurality of cyclone pipes provided in the flow reduction path of the melt reduction equipment causing a closed state, A base frame 110 installed to be located above the cyclone of the flow reduction path; A rotating frame 120 mounted on the base frame and installed in a state capable of rotating movement; An arm frame (130) installed in a cantilever structure on the rotating frame such that the position of the plurality of cyclones can be indexed in a state capable of selectively aligning by the rotational movement of the rotating frame; A support frame (150) rotatably installed at a distal end of the arm frame to be aligned on a central axis of the cyclone pipeline; A mast frame 160 installed on the support frame so as to be capable of linear reciprocation so as to be aligned with the cyclone pipe by moving forward and backward; A drive unit 170 installed on the mast frame so as to be capable of linear reciprocation, and having an excavator hammer 171, a hammer drill rod 172, and an engine unit for driving the excavator frame; And Cyclone boring of the flow reduction path comprising a; boring bit 200 is installed at the tip of the hammer drill rod to drive through the dust layer integrated in the cyclone pipe while rotating and thrust driving; Device. The method of claim 1, The front end of the arm frame 130 is provided with a rotating frame 140 installed to rotate by the drive of the actuator cylinder 131, the fixed end of the rotating frame 140 is the arm frame by the hinge structure (h) At the same time, the free end is connected to the piston rod of the actuator cylinder 131 and is installed to pivot as it is restrained by its forward and backward movement, and the pivot frame 140 is mutually supported. Cyclone boring device of the flow reduction path, characterized in that the support frame 150 and the mast frame 160 is installed to be supported in order to rotate in conjunction. The method of claim 1, Cyclone boring device of the flow reduction path characterized in that the mast frame is further provided with a hammer drill rod detachment unit 180 for the detachment of the hammer drill rod. The method of claim 3, wherein the hammer drill rod detachable unit 180, And a pair of arm brackets 181 and 182 rotatably installed at both ends of one side of the mast frame, and a shaft 183 connected to support and support the respective arm brackets coaxially. The pair of arm brackets 181 and 182 are provided with arm plates 181a and 182a each having a plurality of support holes 181b and 182b for supporting both ends of the hammer drill rod 172. Cyclone boring apparatus for a flow reduction path, characterized in that the position of the head of the excavator hammer 171 by the rotation of the arm plate (181a) (182a) to be detachable of the hammer drill rod. The method of claim 1, The mast frame 160 is a cyclone boring device of the flow reduction path further comprises a bit holder unit 190 for clamping the boring bit 200 when the hammer drill rod 172 attached and detached. The method of claim 5, The bit holder unit 190 includes a turn holder 191 and a fixed holder 192 and a stopper holder 193 for preventing falling when the boring bit is attached and detached, arranged up and down side by side, The turn holder 191 is close to the clamper 191c installed to rotate by the selective driving of a pair of first cylinders installed on the holder bracket 191a and the clamper 191c to selectively grip the hammer drill rod. With a pair of second cylinders for The fixed holder 192 is characterized in that the clamper (192c) driven to approach / spaced by a pair of cylinders (192b) installed in the holder bracket (192a) to selectively grip the hammer drill rod (172). Cyclone boring device of the flow reduction path. The method of claim 6, The stopper holder 193 includes a pair of stopper members 193b which are pivoted up and down by the pair of stopper cylinders 193a mounted on the holder frame 190F, respectively, so as to be centered to narrow or widen the interval formed therebetween. Cyclone boring device of the fluid flow path, characterized in that. The method of claim 1, wherein the boring bit 200, A plurality of tip support portions 221 protruding to be arranged in a conical shape on one end of the cylindrical flange 210 connected to the hammer drill rod, and arranged at an evenly disposed angle to the head portion 220. Cyclone boring device of the flow reduction path, characterized in that it comprises a plurality of carbide tool tips (T) installed in the tip support (221).

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