CN103842606B - pneumatic down-the-hole drill - Google Patents
pneumatic down-the-hole drill Download PDFInfo
- Publication number
- CN103842606B CN103842606B CN201280049234.4A CN201280049234A CN103842606B CN 103842606 B CN103842606 B CN 103842606B CN 201280049234 A CN201280049234 A CN 201280049234A CN 103842606 B CN103842606 B CN 103842606B
- Authority
- CN
- China
- Prior art keywords
- piston
- shoulder
- combustion chamber
- accelerating
- percussion piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000009527 percussion Methods 0.000 claims abstract description 111
- 238000002485 combustion reaction Methods 0.000 claims abstract description 74
- 239000000446 fuel Substances 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims description 5
- 230000001737 promoting effect Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000011435 rock Substances 0.000 description 11
- 238000011144 upstream manufacturing Methods 0.000 description 7
- 230000002262 irrigation Effects 0.000 description 6
- 238000003973 irrigation Methods 0.000 description 6
- 241001074085 Scophthalmus aquosus Species 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 230000003116 impacting effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B4/20—Drives for drilling, used in the borehole combined with surface drive
Abstract
A kind of pneumatic down-the-hole drill, has: framework (21); Pneumatic percussion piston (24), along with forced air is fed in described DTH rig, described percussion piston moves in complex way, and described percussion piston impacts the following tool, described instrument to be in the front end of described framework (21) and to be installed to be on the longitudinal direction of described framework (21) removable; Feeding passage, in order to be fed to described DTH rig by forced air; With the shoulder in described framework (21) with described percussion piston (24), for controlling compressed air thus providing ballistic motion.In the rear end of described framework (21), described DTH rig comprises: combustion chamber (26) and accelerating piston (25), and described accelerating piston is arranged in order to promote described percussion piston (24) during ballistic motion in a part for the stroke of described percussion piston (24); For by the device in combustion air and fuel feed to described combustion chamber (26), thus, described percussion piston (24) is arranged in order to be pushed in described combustion chamber (26) by described accelerating piston (24) after an impact, and before by fuel feed to described combustion chamber (26), compress the air in described combustion chamber (26).
Description
Technical field
The present invention relates to a kind of pneumatic down-the-hole drill, it has: framework and be positioned at the pneumatic percussion piston of framework, when forced air is fed in down-the-hole drill, this percussion piston moves in complex way on the longitudinal direction of framework, and at the end of its ballistic motion, this percussion piston impacts the following tool, and this instrument to be in the front end of framework and to be installed on the longitudinal direction of framework removable; Feeding passage, in order to feeding forced air between framework and percussion piston; With the shoulder in framework and percussion piston, in order to direct pressurized air, thus provide ballistic motion.
Background technology
Down-the-hole drill is used for drilling bore hole in rock.In these DTH rigs (down-the-hole drill), instrument is connected the dead ahead of DTH rig, and utilizes the percussion device of DTH rig to be impacted.
Known solution has shortcoming, and such as, their efficiency is relatively poor.Pneumatic knocking gear does not provide enough efficiency alone, and the risk owing to polluting, not easily use hydraulic impacting device.
Summary of the invention
Target of the present invention is to provide simply a kind of and the pneumatic DTH rig reliably worked.
The feature of DTH rig of the present invention is, it comprises: the combustion chamber being in the rear end of framework, and in a combustion chamber, be in independent accelerating piston between framework and percussion piston, it moves and runs by means of the fuel combustion in combustion chamber on the longitudinal direction of framework, and this accelerating piston is arranged in order to only to promote percussion piston in a part for the stroke of percussion piston during ballistic motion; Air duct, in order to be fed in combustion chamber by combustion air; For injecting fuel into the device in combustion chamber; Exhaust passage, in order to discharge burning gases from combustion chamber, thus, percussion piston is arranged and back in combustion chamber in order to utilize forced air to will speed up piston after every Secondary Shocks, and the therefore air of compression and combustion indoor before fuel feed to combustion chamber.
The theory of this DTH rig is, it comprises the instrument independent pneumatic percussion piston impacted and the independent accelerating piston utilizing fuel combustion to run, this accelerating piston makes the motion of percussion piston accelerate, but will percussion piston be left, to make to perform driving stroke separately by by percussion piston in the duration section of impacting.The another theory of this DTH rig is, utilizes percussion piston to promote accelerating piston by the pressure of forced air, makes accelerating piston be back to initial position.
The invention has the advantages that, perform impact by the percussion piston accelerated by the accelerating piston of operating fuel, will required impact force be provided.But, because accelerating piston leaves percussion piston when impact, so do not affect accelerating piston from instrument recoil active force in return, and stress is not produced to it.
Accompanying drawing explanation
With reference now to accompanying drawing, in more detail the present invention is described, wherein:
Fig. 1 schematically shows rock borer,
Fig. 2 schematically shows another different rock borer, and
Fig. 3 a to 3f schematically shows the structure of down-the-hole drill and the operation in each stage of working cycles thereof.
Detailed description of the invention
Fig. 1 illustrates rock borer 1, and rock borer 1 can comprise removable chassis 2, and removable chassis 2 has drill boom 3.Drill boom 3 has brill rock unit 4, and it comprises feed beam 5, feed arrangement 6 and rotary unit 7.Rotary unit 7 can be supported to carrier 8, or alternatively, rotary unit can comprise slipper, or identical supporting member, and by this supporting member, rotary unit is movably supported to feed beam 5.Rotary unit 7 can have rig 9, and it can comprise the drill pipe 10 of one or more interconnection, and is in the drill bit 11 at rig outermost end place.The brill rock unit 4 of Fig. 1 is intended to for rotary drilling, wherein rotary unit 7 rotates around its longitudinal axis in a directionr for making rig 9, and simultaneously rotary unit 7 and the brill rock unit 4 that is attached thereto are fed the centripetal force F along boring direction B by feed arrangement 6.Thus, drill bit by rotating the fractured rock that is used for of R and centripetal force F, and forms boring 12.When boring 12 has been drilled to desired depth, can feed arrangement 6 be passed through, rig 9 pulled out boring 12 on Return-ing direction C, and by rotary unit 7, the connecting thread between drilling rod 10 can be turned on, to dismantle rig.
Fig. 2 illustrates that another bores rock unit 4, and they are different from the brill rock unit in Fig. 1 is, rig 9 has percussion device, more specifically down-the-hole drill 13.Thus, percussion device, more specifically down-the-hole drill 13 is in the opposite end place of rig 9 about rotary unit 7.During holing, down-the-hole drill 13 is in boring, and the instrument with drill bit 11 can be connected directly to down-the-hole drill 13.
Fig. 3 a to 3f illustrates down-the-hole drill of the present invention and the operation in each stage of working cycles thereof.This down-the-hole drill comprises framework 21 and is in the instrument 22 in frame front end, and instrument 22 is mounted to along its longitudinal direction removable.In the application and claims, front end refers to that end being provided with described instrument of DTH rig 13, and DTH rig 13 advances along the direction of this end during holing, and rear end refers to the opposite end of DHT rig 13.
Irrigation channel 23 is there is in the centre of instrument 22.In addition, DHT rig 13 comprises percussion piston 24, and percussion piston 24 is mounted on the longitudinal direction of framework 21 removable.In addition, rig comprises accelerating piston 25, and accelerating piston 25 is in the opposite end of framework 21 about percussion piston 24, is namely in the rear end of percussion piston, and away from instrument 22, and accelerating piston 25 is installed on the longitudinal direction of framework 21 removable.After accelerating piston, away from that side of percussion piston 24, there is combustion chamber 26.DHT rig comprises feeding passage 27, and by this passage, forced air is fed in the annulus 21a between percussion piston 24 and framework 21.In addition, DHT rig comprises: air duct 28, and by this air duct, compressed air is fed in combustion chamber 26; With admission valve 29, control compressed-air actuated feeding by this admission valve.Admission valve 29 may be any suitable valve arrangement, or known a kind of valve itself, and herein as an example, exemplified with flap valve.DHT rig also comprises nozzle 30, and it is comprised in fuel feed device, and fuel is fed to by nozzle in combustion chamber 26.DTH rig also comprises not shown but known timing itself and feed arrangement, and this device is based on the condition in the position of accelerating piston 25 and combustion chamber 26, and such as pressure, controls the fuel feed in combustion chamber 26.
Fig. 3 a illustrates the DTH rig under following situations, wherein percussion piston 24 impact tool 22.The framework 21 of DTH rig comprises pairing shoulder 21b, and accelerating piston comprises stop shoulder 25a.In fig. 3 a, before ballistic motion, once the stop shoulder 25a of accelerating piston 25 encounters the pairing shoulder 21b in framework 21, just stopped accelerating piston 25.In their a part of length, percussion piston 24 and accelerating piston 25 are inserted in, to make never there is unlimited breach or obvious gap between them.
Owing to being still mainly high pressure in combustion chamber 26, even if so compressed-air actuated pressure acts on admission valve 29 by air duct 28, admission valve 29 still remains closed.But, in situations, pressure in combustion chamber 26 becomes more and more lower, that is: burning gases wherein will be discharged in exhaust passage 32, and enter further around accelerating piston, be between described piston and framework 21 space 21c in, and the passage 33 flowed over further in accelerating piston 25, by the space in the centre of piston, enters irrigation channel 23.
In fig 3b, percussion piston 24 has started its reverse movement, and the pressure in combustion chamber 26 reduces, thus makes compressed air can promote flap valve 29 to open.In this stage, from the high pressure of air duct 28, the burning gases of the pressure-air spontaneous combustion room 26 in future of such as about 3 to 5 bar are flushed in exhaust passage 32, and fill combustion chamber with fresh air.
In their a part of length, percussion piston 24 and accelerating piston 25 are inserted in, to make never there is unlimited breach or obvious gap between them.Be inserted in part 24b and 25b place, they comprise working surface 24c and 25c, when percussion piston 24 promotes towards instrument 22 by accelerating piston 25, or when percussion piston 24 will speed up piston 25 promote towards combustion chamber 26 time, working surface 24c and 25c contacts with each other.Meanwhile, the stop shoulder 24a in percussion piston 24 is closely closed from stop shoulder 25a and the connection in the space between shoulder 21b of matching together with the inner surface of pairing shoulder 21b.In this case, the space between percussion piston 24 and accelerating piston 25 forms closed surge chamber 31, is wherein full of compressed air.
Along with percussion piston 24 moves towards accelerating piston 25, the pressure in surge chamber 31 raises, and percussion piston 24 begins through formed forced air pad, will speed up piston 25 and promotes towards combustion chamber.In this case, accelerating piston 25 closes exhaust passage 32 while movement, after-burner 26 in pressure raise and promote admission valve 29 and close, this is because pressure is increased to the air pressure higher than air duct 28 feeding.Thus, there is so-called compression step.Compressed-air actuated pressure acts on the superficial area of percussion piston 24, and therefore produce the power making piston reverses direction, this superficial area is formed by percussion piston surface 24f and 24g be on the front of framework 21 and the difference between that side 24e of the rear end of framework.Described superficial area is larger than the superficial area of the accelerating piston 25 on side, combustion chamber 26, obtains enough compressive forcees thus, with the air of compression and combustion indoor.
Fig. 3 c also illustrates that percussion piston 24 moves enough distances towards accelerating piston 25, the stop shoulder 24a being in its upper end crosses the pairing shoulder 21b in framework 21, thus open the connection of leading to the annulus 21a between percussion piston 24 and framework 21 from surge chamber 31, thus, the pressure in surge chamber 31 reduces.Result, percussion piston 24 can move towards accelerating piston 25 and arrive at accelerating piston 25, thus the stop shoulder 24a of the stop shoulder 25a of accelerating piston 25 and percussion piston 24 and working surface 24c and 25c will contact with each other, and piston continues their stroke towards combustion chamber 26 with identical speed.
Along with percussion piston 24 and accelerating piston 25 move towards combustion chamber 26, work shoulder 24d on the lower end of percussion piston 24 becomes and aligns with the control shoulder 21d in framework, and the closed upstream chamber 21f from the end of the percussion piston 24 be in instrument 22 side is to the connection in feeding passage 27.Meanwhile, percussion piston 24 continues to move towards combustion chamber 26 together with accelerating piston 25.From this motion, the compressed-air actuated pressure carrying out self-feed passage 27 starts to act on percussion piston 24, acts on the working surface 24e of its work shoulder 24d, and produces the power promoting percussion piston towards instrument 22.This makes the motion of percussion piston 24 and accelerating piston 25 slightly slow down.
In Fig. 3 d, air pressure in combustion chamber 26 has shortened into by percussion piston 24 and accelerating piston 25 has high pressure, and fuel is fed in combustion chamber by nozzle 30, according to the operation logic of Diesel engine, owing to being heated and being caused the pressure in combustion chamber 26 sharply to raise, so ignited fuel by the air compressed.
In the decline of percussion piston movement, before described situation, percussion piston 24 has crossed the end of the cleaning hose 23a be connected with irrigation channel 23, thus opens from upstream chamber 21f to the connection of irrigation channel 23, and the forced air thus in upstream chamber 21f is discharged.In this case, percussion piston 24 and accelerating piston 25 start ballistic motion when ignited fuel.Meanwhile, the pressure-air carrying out self-feed passage 27 acts on the working surface 24e of work shoulder 24d of percussion piston 24, and this is tending towards percussion piston 24 to promote towards instrument 22.
Fig. 3 e illustrates following phases, that is: wherein percussion piston 24 has closed upstream chamber 21f by the cleaning hose 23a that is associated with irrigation channel 23 connection to irrigation channel 23.In the case shown, when the shoulder 24d that works has crossed control shoulder 21d, just open following connection, that is: from the connection of the annulus 21a to upstream chamber 21f around compressed air feeding passage 27 and work shoulder 24d.In this case, percussion piston 24 and accelerating piston 25 continue motion with identical speed further on the direction of instrument 22, still contact with each other, but the power that compressed-air actuated pressure produces is against the stroke directions effect of percussion piston 24, this is because the upstream surface 24f in upstream chamber 21f before the work shoulder 24d of percussion piston 24 is larger, percussion piston 24 is made to slow down thus.
In Fig. 3 f, the stop shoulder 24a of percussion piston 24 has been closed the connection from surge chamber 31 to percussion piston surrounding space together with the pairing shoulder 21b of framework, surge chamber 31 forms closed space thus, and along with percussion piston 24 and accelerating piston 25 move on, the air pressure in surge chamber 31 raises.As a result, along with pressure raises the deceleration of motion that the pressure pad formed makes accelerating piston 25, percussion piston is separated from accelerating piston 25 thus, and thus percussion piston 24 no longer promotes towards instrument 22 by accelerating piston 25.
Along with accelerating piston 25 continues its motion towards framework 21 front end, open the connection of leading to exhaust passage 32.Along with piston moves forward, in the space 21c around accelerating piston 25, form negative pressure, this is because the surface area of stop shoulder 25a in the front end of accelerating piston 25 is greater than the surface area of the accelerating piston 25 in combustion chamber 26.Therefore, burning gases suck in the 21c of space by negative pressure fast that produce, this enhance the flushing to combustion chamber 26.
After this, the situation in Fig. 3 a occurs again, wherein percussion piston 24 impact tool 22, and accelerating piston 25 stop shoulder 25a and pairing shoulder 21b place stopping, afterwards, working cycles from starting point again.
In the operation of percussion piston 24 and accelerating piston 25, importantly, along with percussion piston 24 impact tool 22, accelerating piston 25 is contact impact piston 24 on impact direction no longer, but just stops before ballistic motion.Thus, accelerating piston 25 does not receive any impact stress, do not receive the stress that the reflection motive force because of instrument 22 causes, but all stress is all applied only on percussion piston 24 yet.In addition, in operation importantly, accelerating piston 25 can not impact pairing shoulder 21b at full speed.Thus, its impact velocity is buffered air pad in room 31 and slows down, thus the speed of accelerating piston 25 when the pairing shoulder 21b of impact frame 21 is enough must be low, can resist to make material the stress impacting and cause.
The fuel feed of DTH rig is specifically implemented in known various mode itself by using fuel feed flexible pipe, fuel tank etc.Be used for timing fuel feed by using and distribute the machinery of a certain amount of fuel, electronic, pneumatic or other known arrangement, can specifically implement fuel by multiple different technical method and spray.
DTH rig also can run by means of only compressed air, and does not need by fuel feed in combustion chamber, and in this case, its power is naturally obviously lower.Such as, for one or another kind of reason, when will complete boring very modestly, the program is used.Similarly, allow to ignite and to fill in etc. ground without separated ignition device, such as and start the operation of accelerating piston, and only utilize percussion piston to impact accelerating piston, until air in combustion chamber enough hot with fire fuel.
In Fig. 3 a to 3f, schematically illustrate the present invention by means of only example.Within the scope of the general design knowledge of those skilled in the art, by location and the sizing of the shape of the concrete implementation framework of various ways and piston, each passage and shoulder.
Claims (14)
1. a pneumatic down-the-hole drill, comprise: framework and be positioned at the pneumatic percussion piston of framework, when forced air is fed in described down-the-hole drill, described percussion piston moves in complex way in the longitudinal direction of described framework, and the end of the ballistic motion at described percussion piston, the impact of described percussion piston to be in the front end of described framework and to be installed as on the longitudinal direction of described framework can the instrument of movement; Feeding passage, described feeding passage is in order to feeding forced air between described framework and described percussion piston; Be arranged in described framework and the shoulder on described percussion piston, described shoulder in order to direct pressurized air, thus provides described ballistic motion, it is characterized in that,
Described down-the-hole drill comprises: the combustion chamber being in described back-end framework place, and the independent accelerating piston in described combustion chamber, it is between described framework and described percussion piston, move in the longitudinal direction of described framework and run by means of the fuel combustion in described combustion chamber, described accelerating piston is arranged in order to only to promote described percussion piston in a part for the stroke of described percussion piston during ballistic motion; Air duct, described air duct is in order to be fed in described combustion chamber by combustion air; For injecting fuel into the device in described combustion chamber; Exhaust passage, described exhaust passage is in order to discharge burning gases from described combustion chamber, thus, described percussion piston is arranged in order to after each ballistic motion, by means of forced air, described accelerating piston is back in described combustion chamber, and therefore compress the air in described combustion chamber before by fuel feed to described combustion chamber.
2. down-the-hole drill according to claim 1, it is characterized in that, described accelerating piston is arranged in order to described exhaust passage closed before penetrating described combustion chamber, and described accelerating piston towards described combustion chamber travel forward terminate before open described exhaust passage.
3. down-the-hole drill according to claim 1, it is characterized in that, described air duct comprises isolating valve, along with the Pressure Drop in described combustion chamber is low to moderate lower than predetermined pressure level, described isolating valve, is opened, and while described isolating valve, is opened, forced air is arranged to from described air passage, to rinse described combustion chamber and to fill described combustion chamber with fresh combustion air.
4. down-the-hole drill according to claim 2, it is characterized in that, described air duct comprises isolating valve, along with the Pressure Drop in described combustion chamber is low to moderate lower than predetermined pressure level, described isolating valve, is opened, and while described isolating valve, is opened, forced air is arranged to from described air passage, to rinse described combustion chamber and to fill described combustion chamber with fresh combustion air.
5. down-the-hole drill according to claim 1, it is characterized in that, described accelerating piston comprises stop shoulder, with the pairing shoulder at the identical point place in axial direction in described framework, to make before described percussion piston impacts described instrument, along with described stop shoulder and described pairing shoulder meet, described accelerating piston stops.
6. down-the-hole drill according to claim 2, it is characterized in that, described accelerating piston comprises stop shoulder, with the pairing shoulder at the identical point place in axial direction in described framework, to make before described percussion piston impacts described instrument, along with described stop shoulder and described pairing shoulder meet, described accelerating piston stops.
7. down-the-hole drill according to claim 3, it is characterized in that, described accelerating piston comprises stop shoulder, with the pairing shoulder at the identical point place in axial direction in described framework, to make before described percussion piston impacts described instrument, along with described stop shoulder and described pairing shoulder meet, described accelerating piston stops.
8. down-the-hole drill according to claim 5, it is characterized in that, described percussion piston and described accelerating piston are closely inserted in their a part of length, to make in any stage, unlatching all very close to each other between which, described percussion piston comprises stop shoulder at its upper end, along with described impact direction during described ballistic motion of described accelerating piston and described percussion piston to move and before bump against the described pairing shoulder of described framework at the described stop shoulder of described accelerating piston, described stop shoulder is the closed connection from the space between described stop shoulder and described pairing shoulder together with described pairing shoulder, thus surge chamber is provided, and while described accelerating piston moves forward towards described combustion chamber, its volume-diminished and the compressed-air actuated pressure wherein comprised raise, and make the deceleration of motion of described accelerating piston, and correspondingly during the reverse movement of described percussion piston, before described stop shoulder opens the connection from described surge chamber, described stop shoulder promotes described accelerating piston towards described combustion chamber, can air be shifted out from described surge chamber to make described percussion piston and arrive described accelerating piston, described accelerating piston is pushed back in described combustion chamber.
9. down-the-hole drill according to claim 6, it is characterized in that, described percussion piston and described accelerating piston are closely inserted in their a part of length, to make in any stage, unlatching all very close to each other between which, described percussion piston comprises stop shoulder at its upper end, along with described impact direction during described ballistic motion of described accelerating piston and described percussion piston to move and before bump against the described pairing shoulder of described framework at the described stop shoulder of described accelerating piston, described stop shoulder is the closed connection from the space between described stop shoulder and described pairing shoulder together with described pairing shoulder, thus surge chamber is provided, and while described accelerating piston moves forward towards described combustion chamber, its volume-diminished and the compressed-air actuated pressure wherein comprised raise, and make the deceleration of motion of described accelerating piston, and correspondingly during the reverse movement of described percussion piston, before described stop shoulder opens the connection from described surge chamber, described stop shoulder promotes described accelerating piston towards described combustion chamber, can air be shifted out from described surge chamber to make described percussion piston and arrive described accelerating piston, described accelerating piston is pushed back in described combustion chamber.
10. down-the-hole drill according to claim 7, it is characterized in that, described percussion piston and described accelerating piston are closely inserted in their a part of length, to make in any stage, unlatching all very close to each other between which, described percussion piston comprises stop shoulder at its upper end, along with described impact direction during described ballistic motion of described accelerating piston and described percussion piston to move and before bump against the described pairing shoulder of described framework at the described stop shoulder of described accelerating piston, described stop shoulder is the closed connection from the space between described stop shoulder and described pairing shoulder together with described pairing shoulder, thus surge chamber is provided, and while described accelerating piston moves forward towards described combustion chamber, its volume-diminished and the compressed-air actuated pressure wherein comprised raise, and make the deceleration of motion of described accelerating piston, and correspondingly during the reverse movement of described percussion piston, before described stop shoulder opens the connection from described surge chamber, described stop shoulder promotes described accelerating piston towards described combustion chamber, can air be shifted out from described surge chamber to make described percussion piston and arrive described accelerating piston, described accelerating piston is pushed back in described combustion chamber.
11. down-the-hole drills according to claim 1, is characterized in that, comprise timing device, carry out timing explicitly for the position with described accelerating piston to the feeding of fuel.
12. down-the-hole drills according to claim 2, is characterized in that, comprise timing device, carry out timing explicitly for the position with described accelerating piston to the feeding of fuel.
13. down-the-hole drills according to claim 1, it is characterized in that, described percussion piston comprises work shoulder, the area on the surface of the instrument side of described work shoulder is greater than the area on the surface towards described accelerating piston, and described framework comprises auxiliary shoulder, to make in the rear positions of described percussion piston, described work shoulder and described auxiliary shoulder alignment, compressed-air actuated pressure only acts on towards on the surface of described accelerating piston simultaneously, thus produce the power promoting described percussion piston towards described instrument, and in the forward position of described percussion piston, described work shoulder is separated with described auxiliary shoulder, simultaneously compressed-air actuated pressure act on the instrument side of described work shoulder surface and towards on the surface of described accelerating piston, thus produce the power that the described percussion piston of promotion leaves described instrument.
14. down-the-hole drills according to any one of the claims, it is characterized in that, in described percussion piston, towards the front end of described framework and forced air promotes the surface that described percussion piston and described accelerating piston pass through surface area towards described combustion chamber is greater than the surface area towards described combustion chamber of described accelerating piston.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20115980 | 2011-10-06 | ||
| FI20115980A FI123555B (en) | 2011-10-06 | 2011-10-06 | Compressed air driven lowering drill |
| PCT/FI2012/050954 WO2013050657A1 (en) | 2011-10-06 | 2012-10-04 | Pneumatic down-the-hole drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103842606A CN103842606A (en) | 2014-06-04 |
| CN103842606B true CN103842606B (en) | 2016-02-24 |
Family
ID=44883648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280049234.4A Expired - Fee Related CN103842606B (en) | 2011-10-06 | 2012-10-04 | pneumatic down-the-hole drill |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US20140224544A1 (en) |
| EP (1) | EP2751368B1 (en) |
| JP (1) | JP5854536B2 (en) |
| KR (1) | KR101513843B1 (en) |
| CN (1) | CN103842606B (en) |
| AU (1) | AU2012320368B2 (en) |
| CA (1) | CA2850907C (en) |
| CL (1) | CL2014000837A1 (en) |
| FI (1) | FI123555B (en) |
| WO (1) | WO2013050657A1 (en) |
| ZA (1) | ZA201402459B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI20115981L (en) * | 2011-10-06 | 2013-04-07 | Sandvik Mining & Constr Oy | Fuel tank |
| US11072977B2 (en) * | 2016-06-28 | 2021-07-27 | Furukawa Rock Drill Co., Ltd. | Two-piston hydraulic striking device |
| EP3409879B1 (en) * | 2017-06-02 | 2019-11-20 | Sandvik Intellectual Property AB | Down the hole drilling machine and method for drilling rock |
| CN107313714B (en) * | 2017-08-29 | 2023-04-07 | 吉林大学 | Valve pocket type air cushion-free high-performance pneumatic impactor |
| US11680455B2 (en) | 2018-11-13 | 2023-06-20 | Rubicon Oilfield International, Inc. | Three axis vibrating device |
| SE543622C2 (en) | 2019-10-31 | 2021-04-20 | Epiroc Drilling Tools Ab | Pneumatic drill hammer comprising a boost chamber and a drilling rig comprising such a drill hammer |
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- 2012-10-04 JP JP2014533955A patent/JP5854536B2/en not_active Expired - Fee Related
- 2012-10-04 KR KR1020147011982A patent/KR101513843B1/en not_active IP Right Cessation
- 2012-10-04 US US14/350,060 patent/US20140224544A1/en not_active Abandoned
- 2012-10-04 CN CN201280049234.4A patent/CN103842606B/en not_active Expired - Fee Related
- 2012-10-04 EP EP12838275.1A patent/EP2751368B1/en active Active
- 2012-10-04 AU AU2012320368A patent/AU2012320368B2/en not_active Ceased
- 2012-10-04 CA CA2850907A patent/CA2850907C/en not_active Expired - Fee Related
-
2014
- 2014-04-02 ZA ZA2014/02459A patent/ZA201402459B/en unknown
- 2014-04-04 CL CL2014000837A patent/CL2014000837A1/en unknown
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| US4583601A (en) * | 1982-06-04 | 1986-04-22 | Stenuick Freres | Hammer drill |
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| EP0889195A2 (en) * | 1997-07-02 | 1999-01-07 | Uniroc Aktiebolag | Downhole hammer |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2013050657A1 (en) | 2013-04-11 |
| CL2014000837A1 (en) | 2014-09-12 |
| EP2751368B1 (en) | 2017-12-27 |
| CA2850907C (en) | 2016-04-12 |
| EP2751368A1 (en) | 2014-07-09 |
| KR101513843B1 (en) | 2015-04-20 |
| FI20115980A (en) | 2013-04-07 |
| AU2012320368B2 (en) | 2016-02-04 |
| AU2012320368A1 (en) | 2014-05-22 |
| US20140224544A1 (en) | 2014-08-14 |
| JP2014531543A (en) | 2014-11-27 |
| CA2850907A1 (en) | 2013-04-11 |
| FI20115980A0 (en) | 2011-10-06 |
| ZA201402459B (en) | 2015-03-25 |
| JP5854536B2 (en) | 2016-02-09 |
| KR20140067167A (en) | 2014-06-03 |
| CN103842606A (en) | 2014-06-04 |
| FI123555B (en) | 2013-07-15 |
| EP2751368A4 (en) | 2016-06-29 |
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