CN114109380A - Composite cutter head device suitable for hard rock crushing and use method thereof - Google Patents
Composite cutter head device suitable for hard rock crushing and use method thereof Download PDFInfo
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- CN114109380A CN114109380A CN202111438297.6A CN202111438297A CN114109380A CN 114109380 A CN114109380 A CN 114109380A CN 202111438297 A CN202111438297 A CN 202111438297A CN 114109380 A CN114109380 A CN 114109380A
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- 239000011435 rock Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002131 composite material Substances 0.000 title abstract description 8
- 238000007790 scraping Methods 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 9
- 238000005381 potential energy Methods 0.000 claims description 9
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 9
- 230000003068 static effect Effects 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- 238000005065 mining Methods 0.000 description 14
- 239000003245 coal Substances 0.000 description 8
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/16—Machines slitting solely by one or more rotating saws, cutting discs, or wheels
- E21C25/18—Saws; Discs; Wheels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- General Life Sciences & Earth Sciences (AREA)
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- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a composite cutter head device suitable for hard rock crushing and a using method thereof.
Description
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 drill bit body shell along the circumference of the PDC drill 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 impact teeth.
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 the respective original positions to prepare for next impact;
(e) when the depth of the impacted hole meets the requirement, the hydraulic telescopic device retracts the PDC drill bit body into the TBM cutter head, the TBM cutter head is contacted with the surface of the rock at the moment, the TBM cutter body starts to drive the PDC drill bit body and the TBM cutter head to work, meanwhile, a hob on the TBM cutter head rotates and rolls the rock to cut the rock until the TBM cutter head is separated from the surface of the rock, the TBM cutter head and the scraping cutter are in the initial state in the step (a), the TBM cutter head and the scraping cutter are kept static, the reciprocating impact hammer, the high-strength impact head and impact teeth at the top of the drill bit are respectively located in respective original positions, and the hydraulic telescopic device stretches the PDC drill 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 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 hydraulic telescopic device rotating shaft.
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 inside 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 integrally of a hollow cylindrical structure, the PDC bit body 1 is respectively 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 from bottom to top, the PDC bit body shell 1-11 is provided with scraping cutters 1-10, the scraping cutters are provided with scraping teeth 1-5, and the scraping cutters 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, corresponding flow-limiting holes 1-12 are arranged on the reciprocating impact hammer 1-2 along two sides of the central hole and the sealing disc II 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 II 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, a water hole 1-7 is arranged on a gap formed between every two scraping knives 1-10 and a PDC drill bit body shell 1-11, and the water hole 1-7 completely penetrates into the PDC drill bit body shell 1-11 and is communicated with an 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 condition, 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 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 and rolls 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 respectively 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 (7)
1. The utility model provides a compound blade disc device suitable for hard rock is broken, a serial communication port, including PDC drill bit body (1), hydraulic telescoping device (4), TBM cutter head (2), TBM cutter body (3), TBM cutter head (2) set up at TBM cutter body (3) tip, inside TBM cutter body (3) is fixed in hydraulic telescoping device (4), the flexible end of hydraulic telescoping device (4) can stretch out TBM cutter head (2) outside, the flexible end of hydraulic telescoping device (4) is connected with PDC drill bit body (1), PDC drill bit body (1) includes PDC drill bit body shell (1-11) of being connected with the flexible end of hydraulic telescoping device (4), the tip of PDC drill bit body shell (1-11) is provided with a plurality of cutters (1-10) of scraping, the inside of PDC drill bit body shell (1-11) has set gradually sealed dish (1-8) from the end toward the 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 aperture (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 aperture (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 breathing 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).
2. A compound cutter head arrangement suitable for hard rock crushing according to claim 1, characterized in that the end of the PDC bit body casing (1-11) has 5 scraping knives (1-10) evenly arranged along the circumference of the PDC bit body casing (1-11), and that two rows of scraping teeth (1-5) are arranged on the scraping knives (1-10), each row comprising 5 scraping teeth (1-5) arranged at equal intervals.
3. A compound cutter head device adapted for hard rock breaking according to claim 1, characterised in that the hydraulic telescopic device (4) has a self-locking function.
4. A compound cutter head device suitable for hard rock crushing according to claim 1, wherein 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 casing (1-11) of the PDC bit body.
5. A compound cutter head device suitable for hard rock breaking according to claim 1, characterised in that the impact teeth (1-6) are mounted on top of the high-strength impact head (1-3).
6. A compound cutter head device suitable for hard rock crushing according to claim 1, characterized in that the discharge holes (3-1) are symmetrically distributed in two rows of 6 at both ends of the TBM cutter body (3), and the angle between each two rows is 60 degrees.
7. The method of using a compound cutter head assembly adapted for hard rock breaking according to claim 1, comprising the steps of:
(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 in from the bottom of the impact bit and flows into the cavity of the reciprocating impact hammer (1-2) through the sealing disc (1-8) and flows into the flow limiting 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 of the liquid 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 reciprocating impact hammer (1-2) cannot keep a static state, and the reciprocating impact hammer (1-2) drives the compressible spring (1-4) 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 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 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 and rolls the rock in a rotating mode, cutting is conducted until the TBM cutter head (2) is separated from the surface of the rock, then the TBM cutter head (2) and the scraping cutter (1-10) return to the initial state in the step (a) and keep static, the reciprocating impact hammer (1-2), the high-strength impact head (1-3) and impact teeth (1-6) at the top of the drill 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 positions to prepare for next operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111438297.6A CN114109380B (en) | 2021-11-30 | 2021-11-30 | Use method of composite cutter head device suitable for hard rock crushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111438297.6A CN114109380B (en) | 2021-11-30 | 2021-11-30 | Use method of composite cutter head device suitable for hard rock crushing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114109380A true CN114109380A (en) | 2022-03-01 |
| CN114109380B CN114109380B (en) | 2022-09-23 |
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| CN202111438297.6A Active CN114109380B (en) | 2021-11-30 | 2021-11-30 | Use method of composite cutter head device suitable for hard rock crushing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592796A (en) * | 2022-05-10 | 2022-06-07 | 胜利油田万和石油工程技术有限责任公司 | PDC drill bit suitable for tight mudstone stratum |
| CN115301320A (en) * | 2022-08-18 | 2022-11-08 | 王中华 | Building rubbish reducing mechanism for building |
| CN116537705A (en) * | 2023-07-05 | 2023-08-04 | 中国华西工程设计建设有限公司 | Drilling device for bridge underwater pile foundation construction |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605911A (en) * | 2021-08-30 | 2021-11-05 | 中国铁建重工集团股份有限公司 | Cutter head assembly, tunnel driving equipment and tunnel driving construction method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605911A (en) * | 2021-08-30 | 2021-11-05 | 中国铁建重工集团股份有限公司 | Cutter head assembly, tunnel driving equipment and tunnel driving construction method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592796A (en) * | 2022-05-10 | 2022-06-07 | 胜利油田万和石油工程技术有限责任公司 | PDC drill bit suitable for tight mudstone stratum |
| CN114592796B (en) * | 2022-05-10 | 2022-07-12 | 胜利油田万和石油工程技术有限责任公司 | PDC drill bit suitable for tight mudstone stratum |
| CN115301320A (en) * | 2022-08-18 | 2022-11-08 | 王中华 | Building rubbish reducing mechanism for building |
| CN115301320B (en) * | 2022-08-18 | 2023-08-18 | 上海中器环保科技有限公司 | Building rubbish reducing mechanism for building |
| CN116537705A (en) * | 2023-07-05 | 2023-08-04 | 中国华西工程设计建设有限公司 | Drilling device for bridge underwater pile foundation construction |
| CN116537705B (en) * | 2023-07-05 | 2023-09-05 | 中国华西工程设计建设有限公司 | Drilling device for bridge underwater pile foundation construction |
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| Publication number | Publication date |
|---|---|
| CN114109380B (en) | 2022-09-23 |
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