CN110159187A - A kind of High air-pressure DTH hammer - Google Patents
A kind of High air-pressure DTH hammer Download PDFInfo
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- CN110159187A CN110159187A CN201910621174.2A CN201910621174A CN110159187A CN 110159187 A CN110159187 A CN 110159187A CN 201910621174 A CN201910621174 A CN 201910621174A CN 110159187 A CN110159187 A CN 110159187A
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 38
- 238000004891 communication Methods 0.000 claims description 60
- 239000011148 porous material Substances 0.000 claims description 36
- 238000009423 ventilation Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 20
- 238000005553 drilling Methods 0.000 abstract description 16
- 230000008859 change Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 208000006011 Stroke Diseases 0.000 description 21
- 230000000694 effects Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 102000016938 Catalase Human genes 0.000 description 1
- 108010053835 Catalase Proteins 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B1/00—Percussion drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
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- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
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Abstract
The present invention relates to a kind of High air-pressure DTH hammers, belong to downhole tool technical field.The impactor is made of outer housing, top connection, lower contact, bore bit and impact piston, one end of outer housing is equipped with top connection by screw thread, the other end screw thread of outer housing is equipped with lower contact, bore bit is equipped with by retaining ring in lower contact, impact piston is equipped with by casing and bit shank pipe between top connection and bore bit.The impactor can effectively change gas flow rate by regulating the qi flowing in the channels plug after replacement, so as to effectively change the frequency of impact of impactor, improve drilling efficiency to cope with different rock stratum；A possibility that impact piston is with bore bit fracture failure in impact piston and bore bit impact process can be effectively reduced simultaneously, solving existing impactor cannot be low according to drilling efficiency caused by rock stratum change frequency of impact, while the problem of the failure of impact site easy fracture.
Description
Technical field
The present invention relates to a kind of High air-pressure DTH hammers, belong to downhole tool technical field.
Background technique
In recent years, as China continues to increase the investment to infrastructure and all kinds of mining sites, pneumatic hole impinger
It is simple and convenient to operate by its structure, is easy to repair, can effectively removed shaft bottom landwaste, not limited by drilling depth, brill can be reduced
The advantages that tool abrasion, huge attention is received in catalase machinery technical field.As pneumatic hole impinger creeps into skill
The rapid development of art, application field are constantly widened, and are constructed from initial blast hole, are gradually developed to hydrological well Drilling,
Geological core exploration, Base of Dam of Reservoir grout curtain, engineering geologic investigation, no-dig technique pipe installation, building foundation and ground
Nearly all drilling construction field such as engineering.
Pneumatic hole impinger drives high speed piston degree in impactor, high-frequency using pressure-air as power source
Ground moves reciprocatingly, and piston is made to obtain enough energy impact drill bits and carry out bore operation.Impact force is in the form of stress wave
Drill bit is acted on, huge impact energy is generated in the extremely short time, effectively fractured rock, fast pore-creating can reach rock drilling
The purpose of drilling.
Impactor rock drilling drill during, impactor encounter formation characteristics it is softer when, impactor frequency height is more advantageous to
Drilling, but existing impactor cannot change frequency of impact according to stratum, therefore existing impactor drilling efficiency is lower；Simultaneously
Existing impactor in practical applications frequent occurrence impact site fracture failure the problem of.
Summary of the invention
Goal of the invention of the invention is: in view of the shortcomings of the prior art, providing a kind of frequency of impact that can change to cope with difference
Rock stratum, to improve drilling efficiency；A kind of high wind pressure down-the-hole for a possibility that impact site fracture failure can be effectively reduced simultaneously
Impactor.
The technical scheme is that
A kind of High air-pressure DTH hammer, it is made of outer housing, top connection, lower contact, bore bit and impact piston, outer housing
Threaded one end is equipped with top connection, and the other end screw thread of outer housing is equipped with lower contact, passes through retaining ring in lower contact and pricker is housed
Head, it is characterised in that: casing is housed, screw thread is equipped with distribution on the inner wall of sleeve upper end on the outer housing inner wall below top connection
, activity is equipped with non-return valve, non-return valve and top connection connection in sealing contact in distribution seat, and the bottom center of distribution seat is arranged
There is assembly to manage, assembles and regulating the qi flowing in the channels plug is equipped with by flange screw thread on the inner wall of pipe；Activity peace on internal surface of sleeve pipe below distribution seat
Equipped with impact piston, impact piston is connect with bore bit Intermittent Contact.
The regulating the qi flowing in the channels plug is round table-like in ladder, and the centre of regulating the qi flowing in the channels plug is provided with regulating the qi flowing in the channels hole.
The centre of the bore bit end face is provided with venthole, and the upper end of venthole is fixed with bit shank pipe, bit shank pipe
One end extend to above bore bit, be evenly equipped with air hole on the circumference of the bit shank pipe upper end extended to above bore bit；The bottom of bore bit
Portion is fixed with Buddha's warrior attendant tooth, and the bore bit bottom of Buddha's warrior attendant tooth side is provided with core, and core is connected to the lower end of venthole.
Rectangle air channel is uniformly arranged in the top end surface of the distribution seat, the distribution seat circle below rectangle air channel
It is provided with annular gas booking groove on week, distribution seat radial communication hole, distribution seat radial communication hole and dress are evenly equipped on annular gas booking groove
The centre bore of piping is connected to.
The intermediate position outer diameter of the casing circumference is less than two-end part outer diameter, on casing circumference with annular gas booking groove pair
Shape is answered to be evenly equipped with casing radially intercommunicating pore, casing is radially provided with ventilation shoulder on the internal surface of sleeve pipe below intercommunicating pore, leads to
The downward intercommunicating pore of casing diameter is evenly equipped on casing below gas shoulder.
The impact piston is variable diameter cylindrical body, and the centre of impact piston end face is provided with central through hole, center
It is evenly equipped with axial hole on the impact piston end face of through-hole side, is set with axial hole in corresponding shape on the impact piston of axial hole side
It is equipped with impact piston radial communication hole A, impact piston radial communication hole A is connected to axial hole and central through hole respectively, and impact is lived
Impact piston radial direction has been shifted to install on impact piston circumference above plug radial communication hole A with impact piston radial communication hole A
Intercommunicating pore B, impact piston radial communication hole B are connected to central through hole, on impact piston circumference with impact piston radial communication
Hole B is in that corresponding shape is provided with axial air slot, and the impact piston below axial air slot is provided circumferentially about closure flange, envelope
Axial air reservoir is evenly equipped on the impact piston circumference closed below flange；The impact piston passes through closure flange and outer housing
Interval is tightly connected.
One end of the central through hole and the outer wall of assembly pipe are slidably and sealingly connected with, the other end of central through hole and extension
Bit shank pipe sliding contact connection above to bore bit.
Divide on the corresponding central through hole inner wall of impact piston radial communication hole A and impact piston radial communication hole B
It is not provided with ring-shaped ventilation slot.
The regulating the qi flowing in the channels is symmetrically arranged with the assembly caliber of strip on square assembly pipe to intercommunicating pore, assembly caliber beyond the Great Wall
To intercommunicating pore respectively with impact piston radial communication hole A and impact piston radial communication hole B intermittent communication.
Shape corresponding with closure flange is provided with annular air channel on the inner wall of the outer housing.
The beneficial effect of the present invention compared to the prior art is:
The High air-pressure DTH hammer can effectively change gas flow rate by regulating the qi flowing in the channels plug after replacement, so as to effectively change impactor
Frequency of impact, improve drilling efficiency to cope with different rock stratum；Impact piston can be effectively reduced simultaneously and bore bit impacted
Rigid collision degree in journey solves existing punching so as to which a possibility that impact piston is with bore bit fracture failure is effectively reduced
The problem of hitting device cannot be low according to drilling efficiency caused by rock stratum change frequency of impact, while impact site easy fracture fails.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 be in Fig. 1 A-A to structural schematic diagram；
Fig. 3 is the enlarged diagram in Fig. 1 at B；
Fig. 4 is the schematic front view of casing of the invention；
Fig. 5 is the schematic front view of distribution seat of the invention；
Fig. 6 is the schematic top plan view of Fig. 5；
Fig. 7 is the schematic diagram of the section structure of Fig. 5；
Fig. 8 is the schematic top plan view of impact piston of the invention；
Fig. 9 is the schematic diagram of the section structure of impact piston of the invention；
Figure 10 is the enlarged diagram in Fig. 1 at C；
Figure 11 is working state schematic representation of the invention.
In figure: 1, outer housing, 2, top connection, 3, lower contact, 4, bore bit, 5, impact piston, 6, Buddha's warrior attendant tooth, 7, guide sleeve
Pipe, 8, retaining ring, 9, venthole, 10, bit shank pipe, 11, air hole, 12, core, 13, casing, 14, distribution seat, 15, spring,
16, seal head, 17, fitting groove, 18, rectangle air channel, 19, annular gas booking groove, 20, distribution seat radial communication hole, 21, assembly
Pipe, 22, regulating the qi flowing in the channels plug, 23, regulating the qi flowing in the channels hole, 24, assembly caliber to intercommunicating pore, 25, casing radially intercommunicating pore, 26, ventilation shoulder,
27, the downward intercommunicating pore of casing diameter, 28, stroke cylinder, 29, central through hole, 30, axial hole, 31, impact piston radial communication hole A,
32, impact piston radial communication hole B, 33, ring-shaped ventilation slot, 34, axial air slot, 35, closure flange, 36, annular air channel,
37, axial air reservoir.
Specific embodiment
The High air-pressure DTH hammer is made of outer housing 1, top connection 2, lower contact 3, bore bit 4 and impact piston 5, shell
One end of body 1 is equipped with top connection 2 by screw thread, and Buddha's warrior attendant tooth 6 is fixed in top connection 2, the work of the Buddha's warrior attendant tooth 6 in top connection 2
With being the sundries blocked at broken top connection 2, facilitate the assembly and disassembly with drill string.The other end screw thread of outer housing 1 is equipped with
Lower contact 3 is provided with limit shoulder on the outer housing inner wall of the top of lower contact 3, limits and guide sleeve 7 is housed on shoulder, guiding
Cooperation clamping is equipped with retaining ring 8 between casing 7 and lower contact 3, and activity is equipped with bore bit 4 in retaining ring 8, and bore bit 4 is arranged limited
Position flange, bore bit 4 is through defining flange movable hanging in retaining ring 8, and bore bit 4 is connect with lower contact 3 by spline, so that pricker
First 4 can be kept a certain range of axial movement by guide sleeve 7 and be turned by lower contact 3 with the rotation of drill string
It is dynamic.
The centre of 4 end face of bore bit is provided with venthole 9, and the upper end of venthole 9 is fixed with bit shank pipe 10, bit shank pipe 10
One end extend to the top of bore bit 4, extend on the circumference of 10 end of bit shank pipe of 4 top of bore bit and be evenly equipped with air hole 11；Pricker
First 4 bottom is evenly equipped with Buddha's warrior attendant tooth 6, and the effect of the Buddha's warrior attendant tooth 6 on bore bit 4 is fractured rock in the course of work.6 side of Buddha's warrior attendant tooth
4 bottom of bore bit be provided with core 12, core 12 is connected to the lower end of venthole 9.
Casing 13 is housed on 1 inner wall of outer housing of 2 lower section of top connection, screw thread is equipped with distribution on the inner wall of 13 upper end of casing
Seat 14, activity is equipped with non-return valve in distribution seat 14, and non-return valve includes spring 15 and seal head 16, and the top center of distribution seat 14 is set
Be equipped with fitting groove 17, seal head 16 be equipped with by spring 15 in fitting groove 17, seal head 16 under the action of spring 15 with above connect
The lower port connection in sealing contact of first 2 centre bore, the effect of non-return valve are that the air inlet completed in rear enclosed top connection 2 in work is led to
Road (2 centre bore of top connection) prevents the impurity such as water, mud from flowing backward.
Rectangle air channel 18 is uniformly arranged in 14 top end surface of distribution seat of 17 side of fitting groove, under rectangle air channel 18
The distribution seat 14 of side is provided circumferentially about annular gas booking groove 19, and distribution seat radial communication hole 20 is evenly equipped on annular gas booking groove 19.
The bottom center of distribution seat 14 is provided with assembly pipe 21, assembles the centre bore and distribution seat radial communication of pipe 21
Hole 20 is connected to, and is assembled and is equipped with regulating the qi flowing in the channels plug 22 by flange screw thread on the inner wall of pipe 21, regulating the qi flowing in the channels plug 22 is round table-like in ladder, regulating the qi flowing in the channels
The centre of plug 22 is provided with regulating the qi flowing in the channels hole 23, and the assembly pipe of strip is symmetrically arranged on the assembly pipe 21 of 22 top of regulating the qi flowing in the channels plug
Radial communication hole 24.
The intermediate position outer diameter of 13 circumference of casing is less than two-end part outer diameter, the intermediate position of casing 13 and outer housing 1
Inner wall forms a upper annular space, and shape corresponding with annular gas booking groove 19 is evenly equipped with casing radially intercommunicating pore 25 on 13 circumference of casing,
Radially intercommunicating pore 25 be connected to casing with annular gas booking groove 19, and casing is radially provided on the internal surface of sleeve pipe below intercommunicating pore 25
Ventilation shoulder 26,13 internal diameter of casing of 26 top of ventilation shoulder are greater than 13 internal diameter of casing below ventilation shoulder 26, shoulder of ventilating
The downward intercommunicating pore 27 of casing diameter is evenly equipped on the casing 13 of 26 lower sections.
Impact piston 5, impact piston 5, casing 13 and distribution are movably installed on 13 inner wall of casing of 14 lower section of distribution seat
The stroke cylinder 28 of a relative closure is formed between seat 14.
Impact piston 5 is variable diameter cylindrical body, and the centre of 5 end face of impact piston is provided with central through hole 29, and center is logical
The one end in hole 29 and the outer wall for assembling pipe 21 are slidably and sealingly connected with, the other end of central through hole 29 with extend to the top of bore bit 4
10 sliding contact of bit shank pipe connects, and is evenly equipped with axial hole 30, axial hole 30 1 on 5 end face of impact piston of 29 side of central through hole
Corresponding shape is provided with impact piston radial communication hole A31, impact piston radial communication with axial hole 30 on the impact piston 5 of side
Hole A31 is connected to axial hole 30 and central through hole 29 respectively, 5 circumference of impact piston above impact piston radial communication hole A31
Upper and impact piston radial communication hole A31 has shifted to install impact piston radial communication hole B32, impact piston radial communication hole
B32 is connected to central through hole 29, in the course of work, impact piston radial communication hole B32 with piston up and down motion and assembly
Caliber is to 24 intermittent communication of intercommunicating pore, during impact piston radial communication hole A31 and impact piston radial communication hole B32 is corresponding
Ring-shaped ventilation slot 33 is respectively arranged on 29 inner wall of heart through-hole, the effect of ring-shaped ventilation slot 33 is to eliminate impact piston 5 upper and lower
Because the possible rotation of impact piston 5 leads to impact piston radial communication hole A31 or impact piston radial communication hole in motion process
The possibility that B32 cannot be connected to assembly caliber to intercommunicating pore 24 with assembly caliber to the dislocation of intercommunicating pore 24, guarantees impact piston
Radial communication hole A31 or impact piston radial communication hole B32 starts opposite be overlapped to intercommunicating pore 24 with assembly caliber in height
When impact piston radial communication hole A31 or impact piston radial communication hole B32 can be connected to assembly caliber to intercommunicating pore 24.
Corresponding shape is provided with axial air slot 34, axis with impact piston radial communication hole B32 on 5 circumference of impact piston
Effect to air slot 34 is the flow for increasing gas flow space during the work time and increasing gas.On axial air slot 34
5 end of impact piston of side and the inner wall interval of sleeve 13 are tightly connected, on 5 circumference of impact piston of axial 34 lower section of air slot
Be provided with closure flange 35, formed between the impact piston 5 and outer housing 1 of 35 top of closure flange in annular space, closure flange 35
Lower annular space, shape setting corresponding with closure flange 35 on the inner wall of outer housing 1 are formed between the impact piston 5 and outer housing 1 of lower section
There is annular air channel 36, is evenly equipped with axial air reservoir 37 on 5 circumference of impact piston of 35 lower section of closure flange, axial air reservoir 37
Effect is to increase the space of lower annular space and increase gas to the thrust of impact piston 5.Impact piston 5 is by closure flange 35 and outside
Shell 1 is intermittently tightly connected, and 5 bottom of impact piston is connect with 4 top Intermittent Contact of bore bit.
Before the work of the High air-pressure DTH hammer, the seal head 16 of non-return valve and the centre bore sealed bottom of top connection 2
Connection；Impact piston 5 connects under self gravitation effect with bore bit 4, and the closure flange 35 on impact piston 5 is located at shell
In annular air channel 36 on body 1, impact piston radial communication hole B32 is connected to the assembly caliber of assembly pipe 21 to intercommunicating pore 24.
When the work of the High air-pressure DTH hammer, it is passed through high pressure gas into the centre bore of top connection 2 first, is passed through height
It calms the anger after body, high pressure gas is advanced into rectangle air channel 18 under the seal head 16 through the centre bore promotion non-return valve of top connection 2,
It subsequently enters in annular gas booking groove 19.
The working stage of the High air-pressure DTH hammer is divided into return stage and stroke stage, specifically:
The return stage when work of the High air-pressure DTH hammer are as follows: high pressure gas is divided into two after entering in annular gas booking groove 19
Road tributary, high pressure gas is entered in the centre bore of assembly pipe 21 by the distribution seat radial communication hole 20 of distribution seat 14 all the way, into
Enter to assemble the gas in the centre bore of pipe 21 and be again split into two-way tributary, the high pressure gas all the way assembled in pipe 21 reaches regulating the qi flowing in the channels plug
Enter after at 22 through the regulating the qi flowing in the channels hole 23 on regulating the qi flowing in the channels plug 22 in the central through hole 29 of impact piston 5, and then passes sequentially through bit shank pipe
10 and venthole 9 enter core 12, and blown out by core 12, the high pressure gas device to hole bed rock powder of blowout is purged.
Another way high pressure gas in assembly pipe 21 passes sequentially through assembly caliber and radially connects to intercommunicating pore 24 and impact piston
It is aerial that through-hole B32 enters the middle ring that outer housing 1 and impact piston 5 are formed.
Radially intercommunicating pore 25 enters upper annular space by casing for another way high pressure gas in annular gas booking groove 19, in entrance
The high pressure gas of annular space is by annular space in the downward entrance of intercommunicating pore 27 of casing diameter, by annular space in the downward entrance of intercommunicating pore 27 of casing diameter
Interior high pressure gas collaborates with by the high pressure gas in annular space in impact piston radial communication hole B32 entrance.
Annular space under high pressure gas downlink after collaborating in middle annular space is entered by annular air channel 36, into lower annular space
High pressure gas rapidly increases the gas pressure in lower annular space, compared to the gas pressure in stroke cylinder 28, in lower annular space
Gas pressure is higher and pressure is pushed the speed comparatively fast, so that 5 lower end of impact piston and upper end is formed biggish pressure difference, under
High pressure gas in annular space does work to impact piston 5 and pushes impact piston 5 that self gravity is overcome to move upwards.
As impact piston 5 moves upwards, closure flange 35 and outer housing inner wall on impact piston 5 come into contact with company
It connecing, is closed lower annular space, impact piston 5 slows down under self gravitation effect by self inertia and continues up at this time,
It assembles caliber during this to be no longer connected to impact piston radial communication hole B32 to intercommunicating pore 24, as impact piston 5 is transported upwards
Dynamic, assembly caliber is closed to intercommunicating pore 24 by the inner wall of central through hole 29, and relatively closed space is formed in stroke cylinder 28, with
Impact piston 5 move upwards, the gas in stroke cylinder 28 is gradually compressed, and the gas pressure in stroke cylinder 28 gradually increases
Height, the gas pressure after increasing makes impact piston 5, and further deceleration moves upwards.Impact piston 5 moves to the process of highest point
In, impact piston radial communication hole A31 on impact piston 5 is gradually connected to assembly caliber to intercommunicating pore 24, high pressure gas according to
It is secondary that impact work is entered to intercommunicating pore 24 by annular gas booking groove 19, distribution seat radial communication hole 20, assembly pipe 21 and assembly caliber
It fills in the A31 of radial communication hole and is entered in stroke cylinder 28 by axial hole 30, increase 28 gas pressure of stroke cylinder further
Greatly；The top of axial air slot 34 is gradually more than that ventilation shoulder 26 connects axial air slot 34 gradually with stroke cylinder 28 simultaneously
Logical, high pressure gas is entered in stroke cylinder 28 by middle annular space, and with the high pressure gas that is entered in stroke cylinder 28 by axial hole 30
Interflow, further increases rapidly the gas pressure in stroke cylinder 28.
During impact piston 5 moves to highest point, the air hole 11 on bit shank pipe 10 is gradually connected to lower annular space, pricker
Gas in tail pipe 10 is gradually back in lower annular space, keeps gas pressure in the gas pressure and bit shank pipe 10 in lower annular space
Balance reduce the pressure in lower annular space will not due to impact piston 5 moves upwards pressure, but due to the regulating the qi flowing in the channels by regulating the qi flowing in the channels plug 22
The gas that hole 23 enters in bit shank pipe 10 is less and keeps the gas entered in lower annular space less, therefore relative in stroke cylinder 28
Gas pressure ramp-up rate under gas pressure ramp-up rate in annular space is slower, 5 upper end of impact piston compared with lower end will form compared with
Big pressure difference.After impact piston 5 moves to highest point, the stroke stage is subsequently entered.
The stroke stage when work of the High air-pressure DTH hammer are as follows: after impact piston 5 moves to highest point, impacting
Transport impact piston 5 to 4 direction of bore bit
Dynamic, impact piston 5 is into 4 motion process of bore bit, and the air hole 11 on bit shank pipe 10 is gradually no longer connected to lower annular space, lower annular space
By relative closure, with moving downward for impact piston 5, the high pressure gas in lower annular space is gradually compressed, compressed high pressure
Gas does work to bore bit 4, so that bore bit 4 is done work and fractured rock rock, while by the high pressure gas in compressed lower annular space
The impact velocity for effectively reducing impact piston 5 reduces impact stress when impact piston 5 and the collision of bore bit 4, therefore effectively
5 bottom of impact piston and the top of bore bit 4 are reduced due to repeated stock a possibility that fracture failure.
Impact piston 5 is downwards during impact bore bit 4, closure flange 35 on impact piston 5 gradually no longer with shell
Body 1 contacts, and closure flange 35 moves downward in the annular air channel 36 moved on outer housing 1 gradually downward with impact piston 5,
It is closed lower annular space no longer, high pressure gas is again introduced into lower annular space by annular air channel 36；Pipe radial communication is assembled simultaneously
Hole 24 is gradually no longer connected to impact piston radial communication hole A31, and axial air slot 34 is gradually no longer connected to stroke cylinder,
5 end of impact piston of axial 34 top of air slot and the inner wall of casing 13 come into contact with sealed connection, make stroke cylinder 28 again
Secondary to form relatively closed space, with the continuous downlink of impact piston 5, the pressure in stroke cylinder 28 is gradually decreased, impact
Gas pressure in the lower annular space of 5 lower end of piston is gradually higher than the gas pressure in stroke cylinder 28, with impact piston 5 after
Continuous downlink, assembly caliber are gradually connected to impact piston radial communication hole B32 to intercommunicating pore 24, high pressure gas by assembly pipe 21 according to
It is secondary by assembly caliber to intercommunicating pore 24, impact piston radial communication hole B32 enter in annular space, and pass through casing with by upper annular space
The gas of annular space collaborates again in the downward entrance of intercommunicating pore 27 of diameter, under the high pressure gas collaborated in middle annular space is advanced into down again
In annular space.
After impact piston 5 impacts bore bit 4, subsequently enter the return stage, return stage and stroke stage successively alternately,
Make the constantly impact bore bit 4 of impact piston 5, to make bore bit 4 to rock acting fractured rock.
Regulating the qi flowing in the channels hole 23 on regulating the qi flowing in the channels plug 22 can shunt the high pressure gas for entering assembly pipe 21, therefore by replacing different holes
The regulating the qi flowing in the channels plug 22 in the regulating the qi flowing in the channels hole 23 of diameter is flow velocity of the changeable high pressure gas in middle annular space and lower annular space, specifically:
When replacing the regulating the qi flowing in the channels plug 22 in big regulating the qi flowing in the channels hole, the high pressure gas assembled in pipe 21 is entered in central through hole 29 by regulating the qi flowing in the channels hole 23
High pressure gas it is more, the shunting function in regulating the qi flowing in the channels hole 23 is stronger, thus by assembly caliber to intercommunicating pore 24 enter in annular space and
High pressure gas flow velocity in lower annular space is slower, and the frequency of impact of impact piston 5 is lowered.Encounter rock behavio(u)r it is harder when, pass through
The regulating the qi flowing in the channels plug 22 for replacing big regulating the qi flowing in the channels hole can reduce the frequency of impact of impact piston 5, so that effective protection bore bit, avoids bore bit and rock
The continuous high frequency of layer is collided and is damaged.
When replacing the regulating the qi flowing in the channels plug 22 of ditty stomata, the shunting function in regulating the qi flowing in the channels hole 23 reduces, in annular space and lower annular space
High pressure gas flow velocity it is very fast, therefore the frequency of impact of impact piston 5 is raised.Encounter rock behavio(u)r it is softer when, pass through replacement
The regulating the qi flowing in the channels plug 22 of ditty stomata can rise impact piston 5 frequency of impact, so that rock be made quickly to be crushed under high-frequency percussion,
Thus drilling efficiency is improved.
The High air-pressure DTH hammer can effectively change gas flow rate by regulating the qi flowing in the channels plug 22 after replacement, so as to effectively change
The frequency of impact of impactor improves drilling efficiency to cope with different rock stratum；Impact piston 5 and bore bit can be effectively reduced simultaneously
A possibility that impact piston 5 is with 4 fracture failure of bore bit in 4 impact processes, solving existing impactor cannot change according to rock stratum
The problem of drilling efficiency is low caused by frequency of impact, while impact site easy fracture fails.
Claims (10)
1. a kind of High air-pressure DTH hammer, it is lived by outer housing (1), top connection (2), lower contact (3), bore bit (4) and impact
It fills in (5) to constitute, the threaded one end of outer housing (1) is equipped with top connection (2), and the other end screw thread of outer housing (1), which is equipped with down, to be connect
Head (3) is equipped with bore bit (4) by retaining ring (8) in lower contact (3), it is characterised in that: the outer housing (1) below top connection (2)
Casing (13) are housed on inner wall, screw thread is equipped with distribution seat (14) on the inner wall of casing (13) upper end, movable in distribution seat (14)
Equipped with non-return valve, non-return valve and top connection (2) connection in sealing contact, the bottom center of distribution seat (14) are provided with assembly pipe
(21), regulating the qi flowing in the channels plug (22) are equipped with by flange screw thread on the inner wall of assembly pipe (21)；Casing (13) below distribution seat (14)
It is movably installed on inner wall impact piston (5), impact piston (5) is connect with bore bit (4) Intermittent Contact.
2. a kind of High air-pressure DTH hammer according to claim 1, it is characterised in that: the regulating the qi flowing in the channels plug (22) is in rank
Ladder is round table-like, and the centre of regulating the qi flowing in the channels plug (22) is provided with regulating the qi flowing in the channels hole (23).
3. a kind of High air-pressure DTH hammer according to claim 1, it is characterised in that: described bore bit (4) end face
Centre is provided with venthole (9), and the upper end of venthole (9) is fixed with bit shank pipe (10), and one end of bit shank pipe (10) extends
Above to bore bit (4), air hole (11) are evenly equipped on the circumference of bit shank pipe (10) end extended to above bore bit (4)；Bore bit
(4) bottom is fixed with Buddha's warrior attendant tooth (6), and bore bit (4) bottom of Buddha's warrior attendant tooth (6) side is provided with core (12), core (12) with
The lower end of venthole (9) is connected to.
4. a kind of High air-pressure DTH hammer according to claim 1, it is characterised in that: the top of the distribution seat (14)
It has been uniformly arranged on end surface rectangle air channel (18), the distribution seat (14) below rectangle air channel (18) is provided circumferentially about ring
Shape gas booking groove (19) is evenly equipped with distribution seat radial communication hole (24), distribution seat radial communication hole (24) on annular gas booking groove (19)
It is connected to the centre bore of assembly pipe (21).
5. a kind of High air-pressure DTH hammer according to claim 1, it is characterised in that: described casing (13) circumference
Intermediate position outer diameter is less than two-end part outer diameter, and shape corresponding with annular gas booking groove (19) is evenly equipped with set caliber on casing (13) circumference
Upward intercommunicating pore (25), casing are radially provided with ventilation shoulder (26) on casing (13) inner wall below intercommunicating pore (25), lead to
The downward intercommunicating pore of casing diameter (27) is evenly equipped on casing (13) below gas shoulder (26).
6. a kind of High air-pressure DTH hammer according to claim 1, it is characterised in that: the impact piston (5) is
The centre of variable diameter cylindrical body, impact piston (5) end face is provided with central through hole (29), the impact of central through hole (29) side
It is evenly equipped with axial hole (30) on piston (5) end face, with axial hole (30) in corresponding on the impact piston (5) of axial hole (30) side
Shape is provided with impact piston radial communication hole A(31), impact piston radial communication hole A(31) respectively with axial hole (30) and center
Through-hole (29) connection, impact piston radial communication hole A(31) above impact piston (5) circumference on impact piston radial communication
Hole A(31) shift to install impact piston radial communication hole B(32), impact piston radial communication hole B(32) and central through hole
(29) it is connected to, corresponding shape is provided with axial air slot with impact piston radial communication hole B(32) on impact piston (5) circumference
(34), impact piston (5) below axial air slot (34) is provided circumferentially about to be had closure flange (35), below closure flange (35)
Impact piston (5) circumference on be evenly equipped with axial air reservoir (37)；The impact piston (5) passes through closure flange (35) and outer
Shell (1) interval is tightly connected.
7. a kind of High air-pressure DTH hammer according to claim 6, it is characterised in that: the central through hole (29)
The outer wall of one end and assembly pipe (21) is slidably and sealingly connected with, and the other end of central through hole (29) and is extended to above bore bit (4)
Bit shank pipe (10) sliding contact connection.
8. a kind of High air-pressure DTH hammer according to claim 6, it is characterised in that: the impact piston radially connects
Through-hole A(31) and impact piston radial communication hole B(32) ring-shaped ventilation is respectively arranged on corresponding central through hole (29) inner wall
Slot (33).
9. a kind of High air-pressure DTH hammer according to claim 1, it is characterised in that: above the regulating the qi flowing in the channels plug (22)
Assembly pipe (21) on be symmetrically arranged with the assembly caliber of strip to intercommunicating pore (24), assemble caliber to intercommunicating pore (24) respectively
With impact piston radial communication hole A(31) and impact piston radial communication hole B(32) intermittent communication.
10. a kind of High air-pressure DTH hammer according to claim 1, it is characterised in that: the outer housing (1) it is interior
Shape corresponding with closure flange (35) is provided with annular air channel (36) on wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910621174.2A CN110159187B (en) | 2019-07-10 | 2019-07-10 | High wind pressure down-the-hole hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910621174.2A CN110159187B (en) | 2019-07-10 | 2019-07-10 | High wind pressure down-the-hole hammer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110159187A true CN110159187A (en) | 2019-08-23 |
| CN110159187B CN110159187B (en) | 2024-07-23 |
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ID=67638022
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910621174.2A Active CN110159187B (en) | 2019-07-10 | 2019-07-10 | High wind pressure down-the-hole hammer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576184A (en) * | 2020-12-29 | 2021-03-30 | 长江大学 | Pneumatic down-the-hole hammer with energy storage characteristic |
| CN115977525A (en) * | 2023-02-02 | 2023-04-18 | 重庆大学 | Positive-circulation pneumatic down-the-hole hammer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU493847B2 (en) * | 1975-07-01 | 1977-12-22 | William Lister | Improved pneumatic percussion hammer |
| CN201502318U (en) * | 2009-09-03 | 2010-06-09 | 李保顺 | High air-pressure down-the-hole hammer |
| CN102434095A (en) * | 2011-12-30 | 2012-05-02 | 苏州新锐工程工具有限公司 | High wind pressure downhole hammer |
| CN203374202U (en) * | 2013-06-08 | 2014-01-01 | 株洲山川装备配件有限公司 | High-pressure underwater down-hole hammer |
| CN210152546U (en) * | 2019-07-10 | 2020-03-17 | 长江大学 | High wind pressure down-the-hole impacter |
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2019
- 2019-07-10 CN CN201910621174.2A patent/CN110159187B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU493847B2 (en) * | 1975-07-01 | 1977-12-22 | William Lister | Improved pneumatic percussion hammer |
| CN201502318U (en) * | 2009-09-03 | 2010-06-09 | 李保顺 | High air-pressure down-the-hole hammer |
| CN102434095A (en) * | 2011-12-30 | 2012-05-02 | 苏州新锐工程工具有限公司 | High wind pressure downhole hammer |
| CN203374202U (en) * | 2013-06-08 | 2014-01-01 | 株洲山川装备配件有限公司 | High-pressure underwater down-hole hammer |
| CN210152546U (en) * | 2019-07-10 | 2020-03-17 | 长江大学 | High wind pressure down-the-hole impacter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576184A (en) * | 2020-12-29 | 2021-03-30 | 长江大学 | Pneumatic down-the-hole hammer with energy storage characteristic |
| CN112576184B (en) * | 2020-12-29 | 2023-02-28 | 长江大学 | Pneumatic down-the-hole hammer with energy storage characteristic |
| CN115977525A (en) * | 2023-02-02 | 2023-04-18 | 重庆大学 | Positive-circulation pneumatic down-the-hole hammer |
| CN115977525B (en) * | 2023-02-02 | 2024-04-05 | 重庆大学 | Positive circulation pneumatic down-the-hole hammer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110159187B (en) | 2024-07-23 |
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