CN114109380B

CN114109380B - Use method of composite cutter head device suitable for hard rock crushing

Info

Publication number: CN114109380B
Application number: CN202111438297.6A
Authority: CN
Inventors: 刘送永; 李洪盛; 杜迈; 江红祥; 王焱; 崔新霞; 李强; 刘后广; 杨斯冕
Original assignee: Jiangsu Zhongji Mine Equipment Co ltd; China University of Mining and Technology CUMT
Current assignee: Jiangsu Zhongji Mine Equipment Co ltd; China University of Mining and Technology CUMT
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-09-23
Anticipated expiration: 2041-11-30
Also published as: CN114109380A

Abstract

The invention discloses a composite cutter head device suitable for hard rock crushing and a using method thereof.

Description

Use method of composite cutter head device suitable for hard rock crushing

Technical Field

The invention relates to the technical field of coal mining, in particular to a composite cutter head device suitable for hard rock crushing and a using method thereof.

Background

Along with the continuous improvement of coal mining technology and the gradual enhancement of consciousness of people's life on coal mine resource saving, the mining level is seriously restricted by a high-cost, time-consuming and labor-consuming and low-efficiency mining mode, and in the face of occasions with complex appearance and large mining difficulty, the mining mode obviously cannot meet basic mining requirements, a low-cost, safe and efficient coal mining mode becomes the inevitable trend of the coal mining industry, a PDC drill bit and a TBM hob are the most basic tools for coal mining, the performance of the PDC drill bit and the TBM hob seriously restrict the mining efficiency and the mining level, the existing PDC drill bit and the existing TBM hob are mostly independently arranged, most of the existing coal mining modes are complex in structure, poor in impact property, low in working efficiency, long in operation switching time between the PDC drill bit and the TBM hob, and low in coal mining efficiency.

Disclosure of Invention

In view of the technical defects, the invention aims to provide a composite cutter head device suitable for hard rock crushing and a using method thereof.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention provides a composite cutter head device suitable for hard rock crushing, which comprises a PDC (polycrystalline diamond compact) bit body, a hydraulic telescopic device, a TBM (Tunnel boring machine) cutter head and a TBM cutter body, wherein the TBM cutter head is arranged at the end part of the TBM cutter body, the hydraulic telescopic device is fixed in the TBM cutter body, the telescopic end of the hydraulic telescopic device can extend out of the TBM cutter head, the telescopic end of the hydraulic telescopic device is connected with the PDC bit body, the PDC bit body comprises a PDC bit body shell connected with the telescopic end of the hydraulic telescopic device, a plurality of scraping cutters are arranged at the end part of the PDC bit body shell, a first sealing disc, a reciprocating type impact hammer and a second sealing disc corresponding to the reciprocating type impact hammer are sequentially arranged in the PDC bit body shell from bottom to top, the reciprocating type impact hammer is connected with a high-strength impact head capable of extending out of the PDC bit body shell through the second sealing disc, and the side surface of the second sealing disc, which is close to the high-strength impact head, is fixed with the bit body shell through a compressible spring, PDC drill bit body shell front end is provided with the water hole of a plurality of intercommunication PDC drill bit body shell inner chambers, reciprocating type jump bit, sealed two go up the correspondence and be provided with the restricted aperture, restricted aperture and reciprocating type jump bit bottom centre bore and sealed two and reciprocating type clearance intercommunication between the jump bit, restricted aperture internal diameter is less than reciprocating type jump bit inner chamber internal diameter, the lower part of PDC drill bit body shell is provided with the respiratory hole that corresponds with reciprocating type jump bit, be provided with a plurality of relief holes on the TBM cutter body.

Preferably, 5 scraping knives are uniformly arranged at the end part of the PDC bit body shell along the circumference of the PDC bit body shell, two rows of scraping teeth are arranged on the scraping knives, and each row comprises 5 scraping teeth which are arranged at equal intervals.

Preferably, the hydraulic telescopic device has a self-locking function.

Preferably, sealing rings are arranged between the first sealing disc, the reciprocating impact hammer, the second sealing disc and the PDC drill bit body shell.

Preferably, the top of the high-strength impact head is provided with an impact tooth.

Preferably, the discharge holes are symmetrically distributed at two ends of the TBM cutter body in two rows, each row is 6 in total, and an included angle of 60 degrees is formed between every two discharge holes.

The invention also provides a use method of the composite cutter head device suitable for hard rock crushing, which specifically comprises the following steps:

(a) in the initial state, the PDC bit body, the TBM cutter head, the TBM cutter body and the hydraulic telescopic device are kept static, and the reciprocating impact hammer, the high-strength impact head and the impact teeth at the top of the drill bit are respectively positioned in respective original positions;

(b) when the high-strength impact head is not in contact with the rock, the hydraulic expansion device stretches the PDC bit body until the PDC bit body is in contact with the rock and is instantly self-locked, a working medium flows into the bottom of the impact bit and flows into the flow-limiting hole through the sealing disc to reach a cavity of the reciprocating impact hammer, the working medium forms high-pressure liquid at the top of the reciprocating impact hammer, the liquid pressure at the top of the reciprocating impact hammer is higher than that at the bottom, the liquid pressure difference at two ends of the reciprocating impact hammer is gradually increased along with the continuous injection of the working medium until the reciprocating impact hammer cannot keep a static state, and the reciprocating impact hammer drives the compressible spring to move to an upper limit along the central axis of the bit body;

(c) when the reciprocating impact hammer moves to the upper limit, the liquid outflow channel of the PDC bit body is closed, the compressible spring is under the stretching action of the reciprocating impact hammer, so that after the reciprocating impact hammer moves to the upper limit, the stretching potential energy of the spring in the process is released, the compressible spring drives the impact hammer to push the high-strength impact head to move to the lower limit, and the impact teeth complete one-time impact action;

(d) after the impact action is finished, the reciprocating impact hammer and the high-strength impact head move to the lower limit process to enable the compressible spring to be compressed by a certain amount to generate certain compression potential energy, the compressible spring pushes the reciprocating impact hammer and the high-strength impact head to move reversely along the central axis of the PDC bit body until the elastic potential energy is completely released, and at the moment, the reciprocating impact hammer and the high-strength impact head return to respective original positions to prepare for next impact;

(e) when the depth of the impacted hole meets the requirement, the hydraulic telescopic device retracts into the PDC bit body to the TBM cutter head, the TBM cutter head is in contact with the surface of the rock, the TBM cutter head starts to drive the PDC bit body and the TBM cutter head to work, meanwhile, a hob on the TBM cutter head rotates to roll the rock to cut until the TBM cutter head is separated from the surface of the rock, the starting state in the step (a) is returned, the TBM cutter head and the scraping cutter are kept static, the reciprocating impact hammer, the high-strength impact head and the impact teeth at the top of the drill bit are located in respective original positions, and the hydraulic telescopic device stretches the PDC bit body to be self-locked in the original positions to prepare for next operation.

The invention has the beneficial effects that: .

(1) Compare traditional single TBM blade disc, adopt to strike and scrape the PDC drill bit as supplementary, compact structure, the space of arranging of save set satisfies the broken rock demand in complicated stratum, enlarges TBM blade disc operation scope.

(2) The invention can realize the cooperative operation between the PDC drill bit and the TBM hob, reduce the operation switching waiting time of the PDC drill bit and the TBM and greatly improve the operation efficiency.

(3) The PDC drill bit is arranged in the TBM cutter body through the hydraulic telescopic device, and the hydraulic telescopic device drives the PDC drill bit to reciprocate, so that the requirements of various working conditions for operation are met, the PDC drill bit can be retracted into the TBM cutter body after the operation is finished, the structural loss of the drill bit can be reduced, and the service life is effectively prolonged.

(4) Compared with the conventional drill bit, the compressible spring in the PDC drill bit can realize the operation cycle resetting of the impact head, also can play a role in buffering the impact structure, reduces the abrasion and impact among devices, and is beneficial to prolonging the service life of the impact head.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a front view of a compound cutter head device suitable for hard rock crushing according to an embodiment of the invention;

fig. 2 is a front view of a TBM cutter body provided in an embodiment of the present invention;

FIG. 3 is a front view of an impact shave PDC bit and hydraulic telescoping device provided in accordance with an embodiment of the present invention;

FIG. 4 is a front view of an impact shave PDC bit body provided in accordance with an embodiment of the present invention;

FIG. 5 is a cross-sectional view of an impact shave PDC bit body provided in accordance with an embodiment of the present invention.

In the figure:

1. a retractable PDC bit body; 2. TBM cutter head; 3. TBM cutter body; 4. a hydraulic telescopic device; 1-1, a flow limiting hole; 1-2, reciprocating impact hammer; 1-3, high-strength impact head; 1-4, a compressible spring; 1-5, scraping teeth; 1-6, impact teeth; 1-7, water holes; 1-8, sealing the disc I; 1-9, breathing holes; 1-10, a scraper; 1-11, a PDC bit body shell; 1-12, a flow restriction hole; 1-13, sealing disc II; 3-1, a discharge hole; 4-1, a rotating shaft of the hydraulic telescopic device.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5, the present embodiment provides a composite cutter head device suitable for hard rock crushing, which includes a PDC bit body 1, a hydraulic expansion device 4, a TBM cutter head 2, and a TBM cutter body 3; the TBM cutter head 2 is arranged at the end part of the TBM cutter body 3, the hydraulic telescopic device 4 is fixed in the TBM cutter body 3, the telescopic end of the hydraulic telescopic device 4 can extend out of the TBM cutter head 2, the telescopic end of the hydraulic telescopic device 4 is connected with a PDC bit body 1, a PDC bit body shell 1-11 of the PDC bit body 1 is of a hollow cylindrical structure integrally, the PDC bit body 1 is provided with a first sealing disc 1-8, a reciprocating impact hammer 1-2, a second sealing disc 1-13, a high-strength impact head 1-3 and impact teeth 1-6 at the top of a bit respectively from bottom to top, scraping knives 1-10 are arranged on the PDC bit body shell 1-11 and are provided with scraping teeth 1-5, and the scraping knives are welded on the PDC bit body shell 1-11; the scraping knives 1-10, the scraping teeth 1-5 and their attachment in this example are known to the person skilled in the art and will not be described in detail here.

One end of a hydraulic telescopic device 4 is fixed on the TBM cutter body 3, one end of the hydraulic telescopic device is connected with the PDC bit body 1, the hydraulic telescopic device 4 has a self-locking function after being telescopic, the PDC bit body 1 is fixedly connected with a hydraulic telescopic device rotating shaft 4-1 of the hydraulic telescopic device 4 in a threaded manner, a lap joint table is formed at the bottom ends of the hydraulic telescopic device rotating shaft 4-1 and the PDC bit body 1, and a sealing disc I1-8 is fixedly arranged on the lap joint table;

a sealing ring 1-1 is arranged between the first sealing disc 1-8, the reciprocating impact hammer 1-2, the second sealing disc 1-13 and the PDC bit body shell 1-11, one end of a compressible spring 1-4 is welded and fixed on a high-strength impact head 1-3, the other end of the compressible spring is welded and fixed on the inner wall of the PDC bit body, the high-strength impact head 1-3 can reciprocate along the central axis of the PDC bit body 1, and impact teeth 1-6 are arranged at the top of the high-strength impact head;

as shown in fig. 5, a central hole is arranged in the reciprocating impact hammer 1-2, the reciprocating impact hammer 1-2 is provided with corresponding flow limiting holes 1-12 along two sides of the central hole and the sealing disc two 1-13, and two ends of the flow limiting holes 1-12 are respectively communicated with the central hole at the bottom of the reciprocating impact hammer 1-2 and a gap between the sealing disc two 1-13 and the top of the reciprocating impact hammer 1-2; the inner diameter of the central hole is larger than that of the limiting hole 1-12, the PDC bit body 1 is provided with two breathing holes 1-9, one breathing hole 1-9 is arranged on a fixed shell at the bottom of the reciprocating impact hammer 1-2, one end of the breathing hole is communicated with the central hole, the other end of the breathing hole penetrates through the outer part of the bit body shell 1-11 and is communicated with the atmosphere, the other breathing hole is arranged at the top of the fixed shell of the reciprocating impact hammer 1-2, one end of the breathing hole is communicated with the central hole, and the other end of the breathing hole penetrates through the outer part of the bit body shell 1-11 and is communicated with the atmosphere.

5 scraping knives 1-10 are arranged, an included angle of 72 degrees is formed between every two scraping knives, two rows of scraping teeth are respectively arranged on the scraping knives 1-10, each row comprises 5 scraping teeth 1-5, the scraping teeth 1-5 are uniformly distributed on the scraping knives 1-10, the scraping knives 1-10 and the scraping teeth 1-5 are fixed through welding, water holes 1-7 are arranged on a gap formed between every two scraping knives 1-10 and the PDC drill bit body shell 1-11, and the water holes 1-7 completely penetrate through the PDC drill bit body shell 1-11 and are communicated with the inner cavity of the PDC drill bit body; the TBM cutter body 3 is provided with discharge holes 3-1, and the discharge holes 3-1 are provided with two rows which are symmetrically distributed at two ends of the TBM cutter body 3, wherein 6 discharge holes are formed in each row, and an included angle of 60 degrees is formed between every two discharge holes. The PDC bit body 1 is pushed in and retracted by means of the hydraulic telescopic device 4 to meet operation requirements under different working conditions, and meanwhile, the scraping cutters 1-10 on the PDC bit body 1 can scrape rocks while impacting, so that the rock feeding depth is improved, and a prerequisite is provided for assisting the TBM hob to break the rocks.

The specific use method of the embodiment includes the following steps:

(a) in the initial state, the PDC bit body 1, the TBM cutter head 2, the TBM cutter body 3 and the hydraulic telescopic device 4 are kept static, and the reciprocating impact hammer 1-2, the high-strength impact head 1-3 and the impact teeth 1-6 at the top of the drill bit are respectively positioned in respective original positions;

(b) when the high-strength impact head 1-3 is not in contact with the rock, the hydraulic expansion device 4 stretches the PDC bit body 1 to be in contact with the rock and is subjected to instantaneous self-locking, a working medium flows into the bottom of the impact bit and flows into the cavity of the flow limiting hole 1-12 through the sealing disc 1-8 to reach the reciprocating impact hammer 1-2, the inner diameter of the flow limiting hole 1-12 is smaller than the inner diameter of the central hole of the impact hammer 1-2, therefore, the working medium finally forms high-pressure liquid at the top of the impact hammer 1-2, the working medium forms high-pressure liquid at the top of the reciprocating impact hammer 1-2, the liquid pressure at the top of the reciprocating impact hammer 1-2 is higher than that at the bottom, the liquid pressure difference at two ends of the reciprocating impact hammer 1-2 is gradually increased along with the continuous injection of the working medium until the working medium cannot keep a static state, and the reciprocating impact hammer 1-2 drives the compressible spring 1-4 to move to the upper limit bit body along the central axis (ii) a

(c) When the reciprocating impact hammer 1-2 moves to the upper limit, the liquid outflow channel of the PDC bit body 1 is closed, the compressible spring 1-4 is under the stretching action of the reciprocating impact hammer 1-2, so that after the reciprocating impact hammer 1-2 moves to the upper limit, the tensile potential energy of the spring in the process is released, the compressible spring 1-4 drives the impact hammer 1-2 to push the high-strength impact head 1-3 to move to the lower limit, and the impact teeth 1-6 complete one-time impact action;

(d) after the impact action is finished, the reciprocating impact hammer 1-2 and the high-strength impact head 1-3 move to the lower limit process to enable the compressible spring 1-4 to be compressed for a certain amount of compression to generate a certain compression potential energy, the compressible spring 1-4 pushes the reciprocating impact hammer 1-2 and the high-strength impact head 1-3 to move reversely along the central axis of the PDC bit body 1 until the elastic potential energy is completely released, and at the moment, the reciprocating impact hammer 1-2 and the high-strength impact head 1-3 return to the respective original positions to prepare for the next impact;

(e) when the impacted hole depth meets the requirement, the specific hole depth requirement is determined according to the actual situation, the hydraulic telescopic device 4 retracts into the PDC bit body 1 to the TBM cutter head 2, the TBM cutter head 2 is in contact with the surface of a rock, the TBM cutter head 3 starts to drive the PDC bit body 1 and the TBM cutter head 2 to work, meanwhile, a hob on the TBM cutter head 2 rotates to roll the rock to cut until the TBM cutter head 2 is separated from the surface of the rock, the step a is returned to the initial state, the TBM cutter head 2 and the scraping tools 1 to 10 are kept static, the reciprocating impact hammers 1 to 2, the high-strength impact heads 1 to 3 and the impact teeth 1 to 6 at the tops of the drill bits are located at respective original positions, and the hydraulic telescopic device 4 stretches the PDC bit body 1 to be self-locked at the original positions to prepare for next operation.

In the specific working process of the embodiment, due to the pressure effect of the liquid medium, the first sealing discs 1-8, the second sealing discs 1-13 and the PDC bit body shell 1-11 are in a pressing and sealing state, and the compound impact hammer 1-2 reciprocates between the first sealing discs 1-8 and the second sealing discs 1-13 to drive the impact teeth 1-6 to complete impact operation.

Compare traditional single TBM blade disc, adopt to strike and scrape the PDC drill bit as supplementary, compact structure, the space of arranging of save set satisfies the broken rock demand in complicated stratum, enlarges TBM blade disc operation scope.

The cooperation operation between PDC drill bit and TBM hobbing cutter can be realized to this embodiment, reduces PDC drill bit and TBM's operation and switches latency, improves the operating efficiency greatly.

This embodiment PDC drill bit passes through hydraulic telescoping device and installs inside the TBM cutter body, through hydraulic telescoping device drive PDC drill bit reciprocating motion, not only satisfies multiple operating mode operation demand, but also inside the PDC drill bit operation finishes the back and can retract the TBM cutter body, can reduce drill bit structural loss, effective increase of service life.

Compare with conventional drill bit, the inside compressible spring of PDC drill bit of this embodiment not only can realize the percussion head operation circulation and reset, also can play the cushioning effect of impact structure, reduces wearing and tearing and the impact between the device, is of value to the life who improves the percussion head.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The use method of the composite cutter head device suitable for hard rock crushing comprises a PDC drill bit body (1), a hydraulic telescopic device (4), a TBM cutter head (2) and a TBM cutter body (3), wherein the TBM cutter head (2) is arranged at the end of the TBM cutter body (3), the hydraulic telescopic device (4) is fixed inside the TBM cutter body (3), the telescopic end of the hydraulic telescopic device (4) can stretch out of the TBM cutter head (2) to the outside, the telescopic end of the hydraulic telescopic device (4) is connected with the PDC drill bit body (1), the PDC drill bit body (1) comprises a PDC drill bit body shell (1-11) connected with the telescopic end of the hydraulic telescopic device (4), a plurality of scraping cutters (1-10) are arranged at the end of the PDC drill bit body shell (1-11), and a sealing disc (1-8) and a sealing disc (1-11) are sequentially arranged inside the PDC drill bit body shell from bottom to top, Reciprocating type jump bit (1-2), the sealed dish two (1-13) that corresponds with reciprocating type jump bit (1-2), reciprocating type jump bit (1-2) are connected with and can pass sealed dish two (1-13) and stretch out PDC drill bit body shell (1-11) outside high strength impact head (1-3), sealed dish two (1-13) are close to the side of high strength impact head (1-3) and are fixed with PDC drill bit body shell (1-11) through compressible spring (1-4), PDC drill bit body shell (1-11) front end is provided with water hole (1-7) of a plurality of intercommunication PDC drill bit body shell (1-11) inner chambers, reciprocating type jump bit (1-2), sealed dish two (1-13) go up the correspondence and are provided with restricted orifice (1-12), the clearance intercommunication between restricted orifice (1-12) and reciprocating type jump bit (1-2) bottom centre bore and sealed dish two (1-13) and reciprocating type jump bit (1-2), restricted orifice (1-12) internal diameter is less than reciprocating type jump bit (1-2) inner chamber internal diameter, the lower part of PDC drill bit body shell (1-11) is provided with respiratory hole (1-9) that correspond with reciprocating type jump bit (1-2), be provided with a plurality of relief holes (3-1) on the TBM cutter body (3), its characterized in that includes following step:

(a) in the initial state, the PDC bit body (1), the TBM cutter head (2), the TBM cutter body (3) and the hydraulic telescopic device (4) are kept static, and the reciprocating impact hammer (1-2), the high-strength impact head (1-3) and the impact teeth (1-6) at the top of the drill bit are respectively positioned in respective original positions;

(b) when the high-strength impact head (1-3) is not in contact with the rock, the hydraulic expansion device (4) stretches the PDC bit body (1) to be in contact with the rock for instantaneous self-locking, a working medium flows into the bottom of the impact bit and flows into a cavity of the reciprocating impact hammer (1-2) through the first sealing disc (1-8) and the restricted flow hole (1-12), the working medium forms high-pressure liquid at the top of the reciprocating impact hammer (1-2), the liquid pressure at the top of the reciprocating impact hammer (1-2) is higher than that at the bottom, the liquid pressure difference at two ends of the reciprocating impact hammer (1-2) is gradually increased along with continuous injection of the working medium until the reciprocating impact hammer (1-2) cannot keep a static state, and the compressible spring (1-4) is driven by the reciprocating impact hammer (1-2) to move to an upper limit position along the central axis of the bit body;

(c) when the reciprocating impact hammer (1-2) moves to the upper limit, a liquid outflow channel of the PDC bit body (1) is closed, the compressible spring (1-4) is under the stretching action of the reciprocating impact hammer (1-2), so that after the reciprocating impact hammer (1-2) moves to the upper limit, the tensile potential energy of the spring in the process is released, the compressible spring (1-4) drives the impact hammer (1-2) to push the high-strength impact head (1-3) to move to the lower limit, and the impact teeth (1-6) complete one-time impact action;

(d) after the impact action is finished, the reciprocating impact hammer (1-2) and the high-strength impact head (1-3) move to the lower limit process to enable the compressible spring (1-4) to be compressed for a certain amount of compression to generate a certain compression potential energy, the compressible spring (1-4) pushes the reciprocating impact hammer (1-2) and the high-strength impact head (1-3) to move reversely along the central axis of the PDC bit body (1) until the elastic potential energy is completely released, and at the moment, the reciprocating impact hammer (1-2) and the high-strength impact head (1-3) return to respective original positions to prepare for next impact;

(e) when the depth of the impacted hole meets the requirement, the hydraulic telescopic device (4) retracts into the PDC bit body (1) to the TBM cutter head (2), at the moment, the TBM cutter head (2) is in contact with the surface of the rock, the TBM cutter body (3) starts to drive the PDC bit body (1) and the TBM cutter head (2) to work, meanwhile, a hob on the TBM cutter head (2) rotates to roll the rock to cut until the TBM cutter head (2) is separated from the surface of the rock, the TBM cutter head (2) and the scraping cutter (1-10) are kept static after the TBM cutter head (3) and the scraping cutter (1-10) return to the initial state in the step (a), the reciprocating impact hammer (1-2), the high-strength impact head (1-3) and the impact teeth (1-6) at the top of the bit are located in respective original positions, and the hydraulic telescopic device (4) stretches the PDC bit body (1) to be self-locked in the original position to prepare for next operation.

2. The use method of the composite cutter head device suitable for hard rock crushing according to claim 1, characterized in that 5 scraping cutters (1-10) are uniformly arranged at the end part of the PDC bit body casing (1-11) along the circumference of the PDC bit body casing (1-11), two rows of scraping teeth (1-5) are arranged on the scraping cutters (1-10), and each row comprises 5 scraping teeth (1-5) which are arranged at equal intervals.

3. Use of a compound cutter head device for hard rock breaking according to claim 1, characterised in that the hydraulic telescopic device (4) has a self-locking function.

4. The use method of the composite cutter head device suitable for hard rock crushing in the claim 1 is characterized in that a sealing ring (1-1) is arranged between the first sealing disc (1-8), the reciprocating impact hammer (1-2), the second sealing disc (1-13) and the PDC bit body shell (1-11).

5. The use of a compound cutter head device for hard rock breaking according to claim 1, characterized in that the top of the high-strength impact head (1-3) is provided with impact teeth (1-6).

6. The use method of the composite cutter head device suitable for hard rock crushing in claim 1 is characterized in that the discharge holes (3-1) are symmetrically distributed at two ends of the TBM cutter body (3) in two rows, 6 in total, and the included angle between every two rows is 60 degrees.