WO2022114572A1

WO2022114572A1 - Core barrel hammer system having improved slime discharging and core cutting functions

Info

Publication number: WO2022114572A1
Application number: PCT/KR2021/015797
Authority: WO
Inventors: 송채연
Original assignee: 송채연
Priority date: 2020-11-30
Filing date: 2021-11-03
Publication date: 2022-06-02
Also published as: KR20220076282A; KR102559520B1

Abstract

The purpose of the present invention is to provide a core barrel hammer system having improved slime discharging and core cutting functions, wherein the system prevents clogging of a slime discharge pipe even while quickly discharging slime crushed by a hammer, enables smooth slime discharge on the ground, and has an improved core cutting means such that core separation and maintenance of the core cutting means are convenient. The present invention is configured by installing: a plurality of air hammers, which are connected to a rotation drive gearbox of a pile drilling machine via rods and installed in a cylindrical rotation body in which a downwardly open core formation space is formed; a slime discharge pipe for discharging slime crushed by the air hammers; and a core cutting means for cutting the lower end of a core formed inside the core formation space. A storage container support is installed above the rotation body, and a slime storage container capable of ascending/descending along the rods is formed above the storage container support, wherein the upper end of the slime discharge pipe is disposed inside the slime storage container to supply the slime. A filtration rod is installed on a suction side of the slime discharge pipe to restrict the size of the suctioned slime, and a spray nozzle for spraying compressed air is installed in the middle of the slime discharge pipe, wherein the spray nozzle is configured to break down the compressed air in the direction in which the slime is discharged.

Description

Core barrel hammer system with improved slime discharge and core cutting function

The present invention relates to a core barrel hammer system with improved slime discharge and core cutting functions used as the power of a pile drilling machine when excavating a large diameter (1000 mm or more) in a bedrock layer, and more specifically While quickly discharging the crushed slime by the hammer, it prevents the clogging of the slime discharge pipe and provides smooth discharge of the slime from the ground. It is intended to provide a core barrel hammer system with improved slime discharge and core cutting functions, which is also convenient for maintenance.

In general, for construction and bridge foundation construction, the work (R.C.D method) is performed to reinforce work by installing piles made of steel pipes, etc., on soft ground or bedrock layers. In the case of the above R.C.D method, it is a method of excavating a large diameter (1000mm or more).

Typically, the drum stabilizer is coupled to the top of the drill pipe of the pile drilling machine, and the bit body is installed with several bits in the circumferential direction at the bottom of the drill pipe, and the bit body is driven under pressure. Therefore, there is a method of drilling an excavation hole in the bedrock layer at once.

In addition, a drum stabilizer is attached to the upper part of the drill pipe of the pile drilling machine, a pipe-shaped bit body is attached to the lower part of the drill pipe, and several bits are installed at the bottom of the bit body when the drum stabilizer rotates. This is a method of drilling an excavation hole by rotating the bit body together, making a donut-shaped groove while the bit scrapes the rock layer, and removing it when the groove is formed to a certain depth and the core barrel is formed.

In the case of the core barrel method, as described above, compared to the method of excavating the entire bedrock layer, there are advantages such as being able to excavate a large excavation hole while minimizing the excavation area. There was a problem that the bit replacement cost was high and workability was very poor.

As a method to solve this problem, the drilling for core barrel work of the pile drilling machine of the Republic of Korea Utility Model Publication No. (Y1)20-0444654 (2009.05.20.) is proposed, and the configuration is the drum stabilizer of the pile drilling machine ( In the excavation hammer for core barrel work in which a hammer bit coupled to a drum stabilizer and excavating the ground on a rotating body provided at the top with a flange, and a suction and discharge pipe to discharge the pulverized material to the ground, the rotating body has a donut in cross section It is configured in a cylindrical shape with an open bottom so as to have a hollow configuration as in is done

This can provide significantly improved excavation capacity compared to the existing R.C.D method for large-diameter excavation work of 1000mm or more, thereby providing the effect of significantly shortening the working period. However, the hammer bit and bit body responsible for drilling are cylindrical, and the configuration is to install at least two or more hammer bits installed in the circumferential direction on the edge side of the rotating body, and also at the bottom of the donut-shaped rotating body. A plurality of roller bits are installed so as not to interfere with the hammer bit, and a suction and discharge pipe is formed to discharge the pulverized material to the ground.

As another example, the multi-core barrel hammer system of Korean Patent Registration No. (B1)10-1596926 (2016.02.24.) is provided, and the configuration is used in combination with a drum stabilizer 2 of a pile drilling machine. A hammer bit that is assembled with an assembly hole formed in a cylindrical rotating body that has a circular or rectangular configuration, and a roller bit installed in the rotating body to prevent the bit body from directly interfering with the crushing surface at top dead center And, in the multi-core barrel hammer system configured to include a suction discharge pipe formed on the rotating body and discharging the crushed material crushed by the hammer bit to the upper portion; The suction and discharge pipe is formed to be close to the bit body in the opposite direction to the rotational direction of the rotating body; At the bottom of the bit body, the crushed material flow path is formed in a concave shape to open toward the suction discharge pipe from the center so that the crushed material crushed by the bit body is discharged to the suction discharge pipe; The crushed material flow path formed in the bit body gradually widens from the center of the bit body to the outside, so that the crushed material can be discharged.

In the case of the prior art configured as described above, there is a significant effect in improving the work efficiency, but there is a problem in that the crushed material (slime) discharge ability is reduced by blocking the suction discharge pipe depending on the size of the crushed material, and also a slag storage tank that can be installed on the upper part There was a problem in that a significant amount of the crushed material remains inside when discharging the crushed material (slime) from the.

In addition, when the hammer bit is installed in the center of the core forming space, the air pressure in the core forming space increases, causing the rotating body to float, which also causes a problem in that the crushing ability is lowered.

(Patent Document 1) Republic of Korea Utility Model Publication No. 200444654 (2009.05.20. Announcement)

(Patent Document 2) Korean Patent Registration Publication No. 101596926 (2016.02.24. Announcement)

Accordingly, the present inventor has researched and developed the present invention to eliminate various problems caused by the discharge of slime in the conventional core barrel hammer system as well as various problems caused by the maintenance of the cutting means.

That is, in the present invention, in providing a core barrel hammer system, a filter rod is placed on the inlet side of the slime discharge pipe to limit the size of the discharged slime, and an air nozzle sprayed to the discharge side is installed in the slime discharge pipe to quickly discharge the slime. In order to improve slime discharge from the ground, by placing an inclined discharge plate at the bottom of the slime storage container, an air discharge hole connecting the core forming space and the outside is formed to prevent the hammer system from being lifted by air pressure. In addition, when the core is stuck in the inner wall and it is difficult to separate, pressurized compressed air is connected to the air outlet hole to facilitate core separation. The present invention was completed with the technical task of the invention in mind by providing a core barrel hammer system with improved slime discharge and core cutting functions, which facilitates separation and blocks the core cutting means to provide convenience for maintenance. .

As a means to solve the problem, in the present invention, first, a plurality of air hammers connected to the rotary drive gear box of the pile drilling machine and a rod, and installed in a cylindrical rotating body having a core forming space opened downwardly formed on the inside, and the air hammer A slime discharge pipe for discharging crushed slime and a core cutting means for cutting the lower end of the core formed in the core forming space are installed, and a storage container support is installed on the upper side of the rotating body, and the upper side can be raised and lowered along the rod. But forming a slime storage bin, the slime storage bin is configured so that the slime is supplied by arranging the upper end of the slime discharge pipe;

A filter rod is installed on the suction side of the slime discharge pipe to limit the size of the suctioned slime, and a jet nozzle through which compressed air is sprayed is installed in the middle of the slime discharge pipe, and the jet nozzle sprays compressed air in the direction in which the slime is discharged. It is characterized in that it is configured to do so.

Second, it is characterized in that the slime discharge plate is formed to be inclined outward from the center on the upper side of the storage container support.

Third, an air hammer for a core is further provided in the center of the core forming space, and the core cutting means is provided around the air hammer for the core and includes an expansion part capable of expanding or contracting according to the flow of a high-pressure fluid and for the core. It is provided at the lower end of the air hammer and characterized in that it is composed of one or more of the expandable hammer bits that can be expanded in size according to rotation.

Fourth, it is characterized in that the rotation body is formed with a pressure regulating hole penetrating to the outside from the middle upper end of the core forming space.

Fifth, the core cutting means installs a rotary motor on the rod of the pressurizing cylinder coupled to the inside of the cutting means block separately coupled to the cutting means coupling groove, and installs a cutter blade in this rotary motor according to the operation of the pressurizing cylinder It is characterized in that the cutter blade is configured to protrude and retract into the core forming space.

Sixth, the core cutting means is characterized in that the cutting bit is installed on the rod of the pressing cylinder coupled to the inside of the cutting means block separated and coupled to the cutting means coupling groove.

Seventh, the core cutting means installs a pressurizing cylinder coupled to the inside of the cutting means block separately coupled to the cutting means coupling groove, and on the rod of the pressurizing cylinder, one end of the rotation link coupled to rotate with a pin to the cutting means block. It is fixed, and a free rotating cutter blade is installed at the other end of the pivoting link so that it can protrude and retract into the core forming space according to the rotation of the pivoting link.

When the core barrel hammer system with improved slime discharge and core cutting functions provided in the present invention is used, the following effects are obtained.

- Compared to the existing R.C.D method for large-diameter excavation work of 1000mm or more, it can provide significantly improved excavation capability, which can significantly shorten the working period.

-When the crushed slime is discharged through the air hammer installed on the rotating body to the slime discharge pipe, only slimes of a certain size or less are discharged by the filter rod installed on the suction side, and the spray nozzle installed in the slime discharge pipe Since the compressed air sprayed from the air pushes up the slime, the slime can be discharged quickly and the clogging of the slime discharge pipe can be eliminated.

-Since the slime discharge plate with an outwardly inclined configuration is provided on the upper side of the storage bin support, when the slime storage bin is moved upward, the stored slime is quickly poured out by the induction of the slime dispensing plate, so it can be expected to improve work efficiency. have.

-The pressure control hole that penetrates to the outside is formed in the core forming space of the rotating body, so it is possible to prevent the occurrence of the phenomenon of air floating in the core forming space during excavation work, and air that can be pressurized when the core is caught in the inner wall By connecting the line, it is possible to improve the work efficiency, which is easy to remove the core and slime.

1 is a schematic front view showing a preferred embodiment of the core barrel hammer system with improved slime discharge and core cutting function provided by the present invention;

Figure 2 is a cross-sectional view of Figure 1

3 is a bottom perspective view showing the configuration of the rotating body of the core barrel hammer system with improved slime discharge and core cutting functions provided by the present invention;

Figure 4 is a perspective view showing the configuration of the inlet side of the slime discharge pipe in the present invention

5 is an enlarged cross-sectional view of the coupling state of the core cutting means applied to the present invention;

6 is a cross-sectional view showing another example of a core barrel hammer system with improved slime discharge and core cutting functions provided by the present invention;

7 is a plan sectional view showing an embodiment of a core cutting means that can be applied to the present invention;

8 is a side cross-sectional view showing another embodiment of the core cutting means that can be applied to the present invention;

9 is a side cross-sectional view showing another embodiment of the core cutting means that can be applied to the present invention;

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is "connected" with another part, this includes not only the case where it is "directly connected" but also the case where it is "indirectly connected" with another member interposed therebetween. . In addition, when a part "includes" a certain component, this means that other components may be further provided without excluding other components unless otherwise stated.

As used herein, terms including an ordinal number such as 'first' or 'second' may be used to describe various components or steps, but the components or steps should not be limited by the ordinal number. . Terms containing an ordinal number should only be interpreted for the purpose of distinguishing one element or step from other elements or steps.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a schematic front view showing a preferred embodiment of the core barrel hammer system with improved slime discharge and core cutting function provided by the present invention, Figure 2 is a cross-sectional view of Figure 1, Figure 3 is provided by the present invention A bottom perspective view showing the structure of the rotating body of the core barrel hammer system with improved slime discharge and core cutting functions, FIG. 4 is a perspective view showing the configuration of the inlet side of the slime discharge pipe in the present invention, and FIG. 5 is a core cutting means applied to the present invention Each of the enlarged cross-sectional views of the bonding state is shown.

The core barrel hammer system (1) with improved slime discharge and core cutting functions provided in the present invention is an equipment used in combination with a rotary drive gear box (2) of a pile drilling machine as shown, and the rotary drive gear box It is a configuration in which the rod 3 is coupled to the lower side of (2), and the rotating body 4 provided with a flange at the upper end is coupled to the lower side of the rod 3 .

At this time, the rotating body 4 is hollow and has a cylindrical shape with a flat cross-section in which the core forming space 5 opened downward is formed, and the rotating body 4 has a plurality of air hammers 6 and , a slime discharge pipe (7) for discharging the crushed slime by the air hammer (6) is installed.

At this time, a plurality of support roller bits 8 are installed on the bottom of the rotating body 4 to prevent direct contact with the crushing surface when the excavation bit of the air hammer 6 is at the top dead center position. At this time, the support roller bit 8 is configured to rotate freely.

In addition, a core cutting means 20 is provided at the bottom of the permanent rotating body 4 to crush the rock using the rotating body 4 to cut the lower end of the core when the core is formed in the core forming space 5 . make it possible

And a storage container support 9 is installed on the upper side of the rotating body 4, and the slime storage container 10 that can be raised and lowered along the rod 3 in a state in which the rod 3 is coupled to the center on the upper side. and arranged so that the upper end of the slime discharge pipe 7 is disposed on the inner upper side of the slime storage container 10 so that the slime can be supplied and stored inside the slime storage container 10 .

The configuration of the core barrel hammer system 1 with improved slime discharge and core cutting functions described above is a general configuration, and in the present invention, the configuration of the slime discharge pipe 7 is improved to enable the slime discharge pipe 7 to work without clogging. did it

That is, in the present invention, as shown in FIG. 4, a filtering rod 11 is installed on the suction side of the slime discharge pipe 7, and a spray nozzle 12 for spraying compressed air in the middle of the slime discharge pipe 7 is installed. do.

The geolreumbong 11 may be arranged in a straight or cross shape, and provides a function of limiting the size of the slime flowing into the slime discharge pipe 7 . And the injection nozzle 12 is arranged so that compressed air can be sprayed in the direction in which the slime is discharged, and pushes the slime rising along the slime discharge pipe 7 upward to provide a function to enable rapid discharge. At this time, the compressed air is connected to the air pipe supplied to the air hammer 6 so that it can be supplied.

As described above, when the slime rod 11 is provided on the inlet side of the slime discharge pipe 7, only those that pass through the hole formed by the filter rod 11 among the slimes pulverized by the air hammer 6 are used as the slime discharge pipe 7 Since it flows in, it is possible to eliminate problems such as clogging of the slime discharge pipe 7 by the slime, and in addition, the compressed air sprayed from the spray nozzle 12 easily pushes the unpulverized slime upward to double the discharge property. This will improve the emission efficiency.

In addition, the present invention is improving the configuration of the storage tube support (9) located on the lower side of the slime storage tube (10) for storing the slime discharged through the slime discharge pipe (7). That is, in the present invention, a slime discharge plate (9a) is further installed on the upper side of the storage tank support (9), and the slime discharge plate (9a) is formed to be inclined outward from the center.

When the slime discharge plate 9a is applied as described above, it is possible to easily provide slime discharge from the ground. That is, the slime storage bin 10 is moved upward to discharge the slime from the ground. At this time, the slime stored in the slime storage bin 10 is quickly discharged to the outside without leaving any traces along the slope of the slime discharge plate 9a. As a result, it is possible to work without the remaining slime as well as shorten the slime discharge time.

6 is a cross-sectional view showing another example of a core barrel hammer system with improved slime discharge and core cutting functions provided by the present invention.

As described above, in configuring the core barrel hammer system 1 with improved slime discharge and core cutting functions, an air hammer 13 for the core is further installed in the center of the core forming space 5 .

When the air hammer 13 for the core is further installed, a hole is drilled in the center of the core formed in the core forming space 5, so that the bedrock and the core can be easily cut.

On the other hand, when the air hammer 13 for the core is installed so as to be located in the center of the core forming space 5 as described above, the air discharged from the core air hammer 13 after use cannot be discharged to the outside, and the core forming space ( 5), which is a phenomenon in which the rotating body 4 of the core barrel hammer system 1 with improved slime discharge and core cutting functions floats on the crushing surface, resulting in a problem of reducing excavation efficiency, in the present invention As a means for solving this problem, a pressure adjusting hole 14 that penetrates from the middle upper end of the core forming space 5 to the outside is formed in the rotating body 4 to form the air and slime discharged from the air hammer 13 for the core. This is to be easily discharged to the outside so that the excavation operation can be made without the phenomenon that the rotating body 4 is lifted as described above. In addition, when a phenomenon in which the core is caught in the inner wall occurs, an air line capable of pressing the core is connected to facilitate the separation of the core.

And the present invention is to actively improve the configuration of the core cutting means 20 provided at the bottom of the rotating body 4, so that the convenience of maintenance and quick workability can be guaranteed.

That is, in the present invention, a cutting means coupling groove 4a is formed in the rotating body 4, and the core cutting means 20 blocked in the cutting means coupling groove 4a is fixed using a fixing means such as a bolt. This makes it easy to separate and replace in case of failure.

7 is a plan sectional view showing an embodiment of a core cutting means that can be applied to the present invention, wherein the core cutting means 20 is a cutting means block 21 that is separated and coupled to the cutting means coupling groove 4a. A rotary motor 23 is installed on the rod of the pressurizing cylinder 22 coupled to the inside, and a cutter blade 24 is installed in this rotary motor 23 according to the operation of the pressurizing cylinder 22, the cutter blade ( 24) is configured so that it can protrude into the core forming space (5).

In this case, when the core cutting means 20 is operated in a state in which the rotating body 4 is driven, the pressurizing cylinder 22 moves the rotating motor 23 and the cutter blade 24 toward the core forming space 5 . As the cutter blade 24 rotates, the lower end of the core is cut.

8 is a side sectional view showing another embodiment of the core cutting means 20 that can be applied to the present invention, wherein the core cutting means 20 is a cutting means block that is separated and coupled to the cutting means coupling groove 4a ( The cutting bit 25 is installed on the rod of the pressurizing cylinder 22 coupled to the inside of the 21).

In this case, when the core cutting means 20 is operated in the state in which the rotating body 4 is driven, the pressurizing cylinder 22 moves the cutting bit 25 toward the core forming space 5, at this time the cutting bit 25 cuts the lower part of the core.

9 is a side sectional view showing another embodiment of the core cutting means 20 that can be applied to the present invention, wherein the core cutting means 20 is a cutting means block that is separated and coupled to the cutting means coupling groove 4a. The pressurizing cylinder 22 coupled to the inside of (21) is formed, and one end of the rotating link 26 coupled to the rod of the pressurizing cylinder 22 is fixed to be rotated with a pin to the cutting means block 21, and , a cutter blade 24 that rotates freely is installed at the other end of the rotation link 26 so that it can protrude and retract into the core forming space 5 according to the rotation of the rotation link 26 .

This is because when the core cutting means 20 is operated in the state in which the rotating body 4 is driven, the cutter blade 24 moves toward the core forming space 5 when the pressurizing cylinder 22 pushes or pulls the rotating link 26 . As it protrudes, the lower part of the core is cut.

On the other hand, in the above-described embodiments, as the core cutting means 20 , the cutter blade 24 or the cutting bit 25 is disposed outside the core forming space 5 and pressed toward the center of the core to cut the lower end of the core. However, the present invention is not limited thereto, and the expansion part may be disposed in the center of the core forming space 5 .

The inflatable part is formed in a donut shape disposed around the lower end of the air hammer 13 for the core at the center of the core forming space 5, and may be composed of an air parka 15 (air packer) made of an elastic material. The expansion unit may be expanded or contracted by the flow of a high-pressure fluid such as water or compressed air.

That is, when the high-pressure fluid is introduced into the expansion part, the expansion part expands toward the circumferential direction of the core forming space 5, and the lower end of the core is cut. Thereafter, when the high-pressure fluid introduced into the expansion unit is discharged, the expansion unit may be contracted and restored to its original state.

Preferably, the compressed air is connected to the air pipe supplied to the air hammer 6 so that it can be supplied.

Preferably, at the lower end of the air hammer 13 for the core at the center of the core forming section 5, an expandable hammer bit 16 capable of expanding or restoring the bit size according to the rotational direction may be installed. In this case, the cutting or separation of the core can be facilitated, and the core forming section 5 can also serve to support the core residues from flowing down.

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

[Explanation of code]

1: Core barrel hammer system 2: Rotary drive gear box

3: Rod 4: Rotating body

4a: cutting means coupling groove 5: core forming space

6: Air hammer 7: Slime discharge pipe

8: Support roller bit 9: Reservoir support

9a: slime dispensing board 10: slime storage bin

11:Gulreumbong 12:Spray nozzle

13: air hammer for core 14: pressure adjusting hole

15: air parka 16: expandable hammer bit

20: core cutting means 21: cutting means block

22: cylinder for pressurization 23: rotation motor

24: cutter blade 25: cutting bit

26: Meeting link

Claims

A plurality of air hammers (6) connected to the rotary drive gear box (2) of the pile drilling machine and the rod (3) and installed in the cylindrical rotating body (4) having a core forming space (5) opened downwards on the inside ), a slime discharge pipe 7 for discharging the slime pulverized by the air hammer 6, and a core cutting means 20 for cutting the lower end of the core formed in the core forming space 5, A storage container support 9 is installed on the upper side of the whole 4, and a slime storage tube 10 that can be raised and lowered along the rod 3 is formed on the upper side thereof, but the slime storage tube 10 is inside the slime discharge pipe 7 ) by arranging the upper end of the configuration so that the slime is supplied;

A filtering rod 11 is installed on the suction side of the slime discharge pipe 7 to limit the size of the suctioned slime, and a spray nozzle 12 through which compressed air is sprayed is installed in the middle of the slime discharge pipe 7, but the injection The nozzle 12 is a core barrel hammer system with improved slime discharge and core cutting function, characterized in that it is configured to spray compressed air in the direction in which the slime is discharged.
The method of claim 1 ;

A core barrel hammer system with improved slime discharge and core cutting function, characterized in that the slime discharge plate (9a) is formed to be inclined outward from the center on the upper side of the storage container support (9).
The method of claim 1 ;

An air hammer 13 for a core is further provided at the center of the core forming space 5,

The core cutting means 20,

An expansion part provided around the air hammer 13 for the core and capable of expanding or contracting according to the flow of the high-pressure fluid;

A core barrel hammer with improved slime discharge and core cutting functions, characterized in that it is provided at the lower end of the air hammer 13 for the core and is composed of one or more of the expandable hammer bits 16 that can expand the bit size according to rotation system.
4. The method according to any one of claims 1 to 3;

The core barrel hammer system with improved slime discharge and core cutting function, characterized in that the rotating body (4) has a pressure control hole (14) that penetrates from the middle upper end of the core forming space (5) to the outside.
The method of claim 1 ;

The core cutting means 20 installs a rotary motor 23 on the rod of the pressurizing cylinder 22 coupled to the inside of the cutting means block 21 separated and coupled to the cutting means coupling groove 4a, and this rotary motor Slime discharge and core cutting function, characterized in that by installing the cutter blade 24 in the 23, the cutter blade 24 can protrude and retract into the core forming space 5 according to the operation of the pressurizing cylinder 22 This improved core barrel hammer system.
The method of claim 1 ;

The core cutting means 20 is characterized in that the cutting bit 25 is installed on the rod of the pressing cylinder 22 coupled to the inside of the cutting means block 21 separated and coupled to the cutting means coupling groove 4a. A core barrel hammer system with improved slime discharge and core cutting functions.
The method of claim 1 ;

The core cutting means 20 has a pressure cylinder 22 coupled to the inside of the cutting means block 21 separated and coupled to the cutting means coupling groove 4a, and a cutting means is provided on the rod of the pressure cylinder 22. One end of the rotation link 26 coupled to the block 21 so as to be rotated with a pin is fixed, and a free-rotating cutter blade 24 is installed at the other end of the rotation link 26 according to the rotation of the rotation link 26 . A core barrel hammer system with improved slime discharge and core cutting functions, characterized in that it is configured to protrude into the core forming space (5).