WO2014070072A1 - Dispositif d'amortissement pour dispositif de percussion, dispositif de percussion, perforatrice de roches et procédé d'amortissement utilisé dans une perforatrice de roches - Google Patents

Dispositif d'amortissement pour dispositif de percussion, dispositif de percussion, perforatrice de roches et procédé d'amortissement utilisé dans une perforatrice de roches Download PDF

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Publication number
WO2014070072A1
WO2014070072A1 PCT/SE2013/051204 SE2013051204W WO2014070072A1 WO 2014070072 A1 WO2014070072 A1 WO 2014070072A1 SE 2013051204 W SE2013051204 W SE 2013051204W WO 2014070072 A1 WO2014070072 A1 WO 2014070072A1
Authority
WO
WIPO (PCT)
Prior art keywords
damping
flow
piston
chamber
control means
Prior art date
Application number
PCT/SE2013/051204
Other languages
English (en)
Inventor
Jonas Henrysson
Erik ALDÉN
Bengt FALK
Jonas Sinnerstad
Original Assignee
Atlas Copco Rock Drills Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Atlas Copco Rock Drills Ab filed Critical Atlas Copco Rock Drills Ab
Priority to CN201380056946.3A priority Critical patent/CN104755230B/zh
Priority to FI20155294A priority patent/FI127509B/fi
Publication of WO2014070072A1 publication Critical patent/WO2014070072A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/24—Damping the reaction force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/24—Damping the reaction force
    • B25D17/245—Damping the reaction force using a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/10—Means for driving the impulse member comprising a built-in internal-combustion engine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/12—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/16—Valve arrangements therefor
    • B25D9/20—Valve arrangements therefor involving a tubular-type slide valve
    • 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
    • E21B1/12—Percussion drilling with a reciprocating impulse member
    • E21B1/24—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure
    • E21B1/26—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by liquid pressure
    • 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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
    • 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
    • E21B6/00—Drives for drilling with combined rotary and percussive action
    • E21B6/02—Drives for drilling with combined rotary and percussive action the rotation being continuous
    • E21B6/04—Separate drives for percussion and rotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2209/00—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D2209/005—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously having a tubular-slide valve, which is coaxial with the piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/195—Regulation means

Definitions

  • the invention relates to a damping device for a
  • percussion device of a rock drilling machine including a damping piston being received in a damping chamber whereto is connected a damping flow circuit including a supply conduit, and wherein an outlet conduit is also connected to the damping chamber.
  • the invention also concerns a method of damping, a percussion device and a rock drilling machine.
  • a damping device for a percussion device of a rock drilling machine is essentially to protect the rock drilling machine and the drill steel from harmful reflective shock waves that occur during drilling.
  • the damping device also aims to provide enhanced properties for transferring the feed force of the drill steel to the rock by ensuring rock contact during drilling.
  • a damping device for percussion machines including a first chamber which is connected to an accumulator and a second chamber for damping reflexes emanating from a drill steel.
  • a damping piston is with tight fit introduced into the second chamber, resulting in that reflexes from the rock are cushioned by liquid being pressed out through the slot formed between the piston and the machine houses when the piston moves in a direction opposite to the striking direction.
  • the one way valve can normally be arranged between the chambers and be directed such that a liquid flow is allowed from the first chamber to the second chamber when the piston moves out from the second chamber.
  • So called floating dampers are also previously known, wherein the damping piston before an impact is intended to be located in a so called floating position, around which it can be displaced in the striking direction as well as opposite thereto.
  • the invention also gives a possibility of increasing the damping flow above a normal value for "normal drilling" in situations requiring a higher effect, which for example could be during drilling upwardly, when the entire weight of the drill string influences the damping.
  • a further case when increased damping flow is of interest and desirable is during start of the drilling machine, wherein a higher damping flow contributes to effective and fasts warming of the drilling machine which thereby can be put in operation faster and with more protectable properties from the beginning. Also during scaling using the drilling machine, a high damping flow is normally desirable.
  • the damping function will be more independent of viscosity changes in the liquid and other operational conditions for the damping that can be changed during the drilling process.
  • Providing a control means to emit control signals to the damping flow regulator for desired damping flow in the damping flow circuit minimizes the risk of an operator making mistakes that could influence the drilling negatively, and the system including the damping device can be made to adapt accurately to the operational conditions in different drilling phases.
  • control means is arranged to receive signals from said sensor for emitting said control signals for measuring and regulating during the drilling process.
  • the control means is arranged to control the damping flow regulator to maintain a constant or essentially constant damping flow as seen over a drilling phase.
  • the senor is a pressure sensor arranged to sense the pressure in the supply conduit downstream of the damping flow regulator, wherein the damping flow is set based on sense pressure. It is also possible to detect the damping flow itself in the inlet flow conduit for regulation. It is not excluded that also other parameters can be subject to sensing .
  • control means is manually settable for adjustment of set damping to operation in at least one of the following: collaring mode, scaling mode, high effect mode (drilling upwards; heating mode), low effect mode and normal drilling .
  • damping flow parameters are set in accordance with the conditions prevailing for the specific situation of the respective drilling or application phase.
  • an altered damping flow effects the floating position since a greater flow requires that the outlet
  • Changed flow is typically related to required feed force and the position of the damper in different situations. A greater flow also gives a little quicker reaction and quicker pressure build up in the damper in a drilling sequence where the drill bit hits the rock after having made an idle impact without rock contact .
  • the damping flow regulator is a pressure compensated proportional flow regulating valve.
  • an accumulator is connected to the damping chamber for pressure levelling purposes.
  • an outlet throttling for throttling of pressure fluid exiting the damping chamber is arranged in the outlet conduit.
  • the outlet throttle is adjustable possibly controlled by said control means.
  • the outlet conduit hereby opens into the damping chamber while forming at least one float hole for establishing a floating position of the damping piston, wherein a float hole throttle is arranged to be established between a control edge radially most
  • the damping piston also includes a second piston portion for co-operation with a second ring-shaped damping chamber.
  • the damping function is essentially enhanced and provided the properties of a double damper.
  • the invention also relates to a percussion device, a rock drilling machine and a method including corresponding features and advantages as are mentioned above.
  • the damping flow is regulated by a damping flow regulator being arranged in said supply
  • conduit, and control signals are emitted by a control means to the damping flow regulator for regulating said damping flow.
  • a parameter which is related to the damping flow is sensed by a sensor, wherein the control means receives signals from said sensor for emitting said control signals.
  • the damping flow regulator is controlled to maintain a constant or essentially constant damping flow as seen over a drilling phase.
  • the sensor senses the pressure in the supply conduit downstream of the damping flow regulator.
  • control means is set for adjustment of set damping to operation in at least one of the following: collaring mode, scaling mode, high effect mode
  • Suitably pressure fluid exiting the damping chamber is throttled by an outlet throttling in the outlet conduit. To a certain extent, this is made to facilitate measuring the damping pressure. Accurate control of the damping flow
  • regulator according to the invention gives the possibility of a reduced degree of throttling while maintaining an adequately ensured damping flow.
  • Figs. 1 and 2 show a drilling machine according to the invention in a perspective view and in an axial section respectively
  • Fig. 3 shows, diagrammatically in a part section, a damping device according to the invention.
  • Fig. 4 diagrammatically shows a block diagram for illustrating a method according to the invention.
  • Figs. 1 and 2 show a rock drilling machine 1 according to the invention in a perspective view and in an axial section respectively, wherein 2 indicates a housing of the rock drilling machine and 3 a shank adapter for the connection to drill steel for forming a drill string.
  • the rock drilling machine 1 exhibits a
  • percussive piston 4 for intermittent striking action on the shank adapter 3.
  • a drill sleeve 5 which in a per se known manner is pressed in the striking direction with the aid of a damping piston 8.
  • the purpose of the damper is i.a. to receive and damp reflecting shock waves that occur during drilling.
  • shock wave reflections that will tend to drive the shank adapter in a direction opposite to the striking direction R, said shock wave reflections being transmitted over the drill bushing to the damping piston.
  • Fig. 3 is shown more diagrammatically the function of the damping device according to the invention.
  • the percussive piston 4 operates in a striking direction against the shank adapter 3 and is in the region of an impact end surrounded by said drill sleeve 5 which is axially moveable in a cylindrical space in the housing 2.
  • the drill sleeve 5 is thus arranged to be pressed against the shank adapter 3 by the damping piston 8 which is likewise received in a cylindrical space inside the housing 2.
  • a first ring-shaped damping chamber 7 which is arranged to co-operate with the first piston portion 6.
  • 17 indicates a second ring-shaped damping chamber which co-operates with a second piston portion 20.
  • the damping piston 8 further exhibits an extended piston portion 8', which for guiding purposes co-operates with a corresponding cylindrical portion of the housing 2.
  • a damping flow source in the form of a pump 9 (in this embodiment; other variants can exist) is connected to the first ring-shaped damping chamber 7 over a supply conduit 14 for damping flow, whereby in said supply conduit 4 there is arranged a damping flow regulator 10.
  • the purpose thereof is to ensure that a desired damping flow is obtained in the damping flow circuit, which includes the supply conduit 14, said first and second ring-shaped damping chambers and a outlet conduit 15.
  • a pressure sensor 12 for sensing the damping flow pressure and an adjustable control means 11, which in the shown embodiment is manually adjustable as well as adjustable on the bases of signals emitted by the pressure sensor 12 for setting the damping flow regulator 10.
  • the damping flow regulator is hereby preferably manually settable as well as controllable by the control means 11, which in turn can be manually actuated and be controllable by way of a control unit, which as an example can be integrated in the control system (CPU on Fig. 3) of the drilling machine. It is however not excluded that the damping flow regulated 10 in its most simple form is exclusively manually settable for obtaining a nearly constant damping flow for a certain drilling operation.
  • auxiliary channel 21 is shown emanating from the first ring- shaped damping chamber over a one way valve to and opening into the second ring-shaped damping chamber 17.
  • the one way valve which can be formed in different per se known manners prevents return flow from the second ring-shaped damping chamber to the first ring-shaped damping chamber.
  • a control edge 6' of the first piston portion 6 will cover at least one float hole 22 being an outlet opening (openings) in the damping chamber.
  • a throttle slot 24 will be established through this displacement being formed between the control edge 6' outermost on the first piston portion 6 and a cylindrical outer wall 18 of the first ring- shaped chamber 7.
  • the liquid at the moment being present in the first ring-shape damping chamber 7 will partly be forced to be pressed into an accumulator 25, which is arranged to level the pressure in the supply conduit. Further, a remaining part of this liquid will pass through the throttle slot 24 whereby the certain part of the reflected energy will be received as heat in the liquid in the throttle and thereby contribute to damping of the reflected shock wave.
  • energy can also be received in a return or outlet throttle 16 being arranged in the outlet conduit 15.
  • said second piston portion 20 of the embodiment in Fig. 3 will act against the liquid being present in the second ring-shaped damping chamber 17, whereby said liquid will pass a slot 23 being formed between a control edge outermost on the second piston portion 20 and the cylindrical outer wall of the second ring-shaped damping chamber 17.
  • the damping device of Fig. 3 functions as double damper, wherein the greatest part of the damping work is performed in the slot 23 whereas the throttle slot in the region of the float hole (holes) 22 to a great extent
  • Position 27 supply of a damping flow to a damping chamber.
  • Position 28 regulating the damping flow in order to obtain a desired set damping flow in the damping flow circuit.
  • the invention can be modified within the scope of the following claims and the percussion device can for example be constructed otherwise and even without a conventional impact piston. In that case it can be a so called impulse machine.
  • the damping device is shown on Fig. 3 in the form of a double damper but it should be understood from the above that the invention is not limited to this embodiment and that it is also applicable in other kinds of dampers such as for example for a single damper, wherein the second ring-shaped damping chamber and the piston portion co-operating therewith as seen in that Figure is eliminated.
  • the supply conduit can be provided with a throttling.
  • the invention is applicable also in percussion devices with several damping pistons operating in separate damping chambers .
  • Such an arrangement can be constructed such that the damping pistons are arranged radially outside each other concentrically with the cylinder of the percussion device.
  • a plurality of suitably circular cylindrical damping pistons each operate in one damping chamber and being arranged distributed around the cylinder of the percussion device. Damping flow is advantageously transmitted to the different damping chambers through a suitable arrangement for flow distribution.
  • the invention is also applicable in respect of damping devices that do not include any accumulator in the damping flow circuit.
  • the arrangement for transmitting shock wave reflexes to the damping piston can also be arranged differently.
  • the components in the machine housing can be arranged otherwise and, for example, the ring-shaped component outside of the most extended part of the damping piston can be an integral part of the machine housing itself.
  • liquids that are used in connection with the invention are the usual hydraulic liquids for similar

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention porte sur un dispositif d'amortissement pour un dispositif de percussion d'une perforatrice de roches (1) ayant une direction de frappe (R), comprenant un piston d'amortissement (8) destiné à agir dans une direction axiale contre un outil à entraîner par le dispositif de percussion, le piston d'amortissement (8) présentant une partie piston (6) qui est reçue dans une chambre d'amortissement (7) à laquelle est relié un circuit de flux d'amortissement comprenant un conduit d'alimentation (14), et un conduit de sortie (15) étant relié à la chambre d'amortissement. Un régulateur de flux d'amortissement (10), qui peut être commandé sous le rapport du flux d'amortissement dans le circuit de flux d'amortissement, est agencé dans ledit conduit d'alimentation (14), et un moyen de commande (11) est conçu pour émettre des signaux de commande au régulateur de flux d'amortissement (10) pour régler ledit flux d'amortissement. L'invention concerne aussi un dispositif de percussion, une perforatrice de roches et un procédé.
PCT/SE2013/051204 2012-10-29 2013-10-15 Dispositif d'amortissement pour dispositif de percussion, dispositif de percussion, perforatrice de roches et procédé d'amortissement utilisé dans une perforatrice de roches WO2014070072A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201380056946.3A CN104755230B (zh) 2012-10-29 2013-10-15 用于撞击装置的缓冲装置、撞击装置、凿岩机以及在凿岩机中缓冲的方法
FI20155294A FI127509B (fi) 2012-10-29 2013-10-15 Iskulaitteen vaimennin, iskulaite, kallioporakone ja vaimennusmenetelmä käytettäessä kallioporakonetta

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1251214A SE536711C2 (sv) 2012-10-29 2012-10-29 Dämpningsanordning för slagverk, slagverk, bergborrmaskin och förfarande för dämpning vid en bergborrmaskin
SE1251214-1 2012-10-29

Publications (1)

Publication Number Publication Date
WO2014070072A1 true WO2014070072A1 (fr) 2014-05-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2013/051204 WO2014070072A1 (fr) 2012-10-29 2013-10-15 Dispositif d'amortissement pour dispositif de percussion, dispositif de percussion, perforatrice de roches et procédé d'amortissement utilisé dans une perforatrice de roches

Country Status (4)

Country Link
CN (1) CN104755230B (fr)
FI (1) FI127509B (fr)
SE (1) SE536711C2 (fr)
WO (1) WO2014070072A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106413956A (zh) * 2014-05-20 2017-02-15 喜利得股份公司 抽吸装置
EP3260647A1 (fr) * 2016-06-22 2017-12-27 Sandvik Mining and Construction Oy Perforatrice de roches
SE2050667A1 (en) * 2020-06-08 2021-12-09 Epiroc Rock Drills Ab Method and System for Diagnosing an Accumulator in a Hydraulic Circuit
FR3120248A1 (fr) * 2021-03-01 2022-09-02 Montabert Perforateur hydraulique roto-percutant pourvu d’un piston de butée et d’une chambre de freinage
WO2023177330A1 (fr) * 2022-03-15 2023-09-21 Epiroc Rock Drills Aktiebolag Agencement d'amortissement et machine hydraulique de forage de roche

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3044572B1 (fr) * 2015-12-02 2017-12-29 Montabert Roger Dispositif brise roches
CN107905722B (zh) * 2017-12-20 2024-03-08 山东天瑞重工有限公司 一种封闭式水压凿岩机
CN111237263A (zh) * 2020-01-09 2020-06-05 中国铁建重工集团股份有限公司 一种用于凿岩机的冲击装置
CN111779734B (zh) * 2020-07-10 2022-06-24 中国铁建重工集团股份有限公司 一种实现能量回收利用的液压凿岩机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0648915A1 (fr) * 1993-10-15 1995-04-19 Atlas Copco Rocktech Ab Dispositif de forage de la roche
WO2002001041A1 (fr) * 2000-06-27 2002-01-03 Sandvik Ab Procede pour separer des joints entre composants de forage et perforatrice de roches
WO2008085114A1 (fr) * 2007-01-11 2008-07-17 Atlas Copco Rock Drills Ab Équipement de forage de roches et procédé en association avec celui-ci

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Publication number Priority date Publication date Assignee Title
JP2000052278A (ja) * 1998-07-31 2000-02-22 Matsuda Asutekku Kk 衝撃工具の衝撃反力吸収構造
CN100439044C (zh) * 2003-03-13 2008-12-03 苏尔策南非有限公司 气动凿岩机
SE529416C2 (sv) * 2005-12-22 2007-08-07 Atlas Copco Rock Drills Ab Dämpanordning jämte borrmaskin inkluderande en dylik dämpanordning
FI119398B (fi) * 2006-12-21 2008-10-31 Sandvik Mining & Constr Oy Iskulaite

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0648915A1 (fr) * 1993-10-15 1995-04-19 Atlas Copco Rocktech Ab Dispositif de forage de la roche
WO2002001041A1 (fr) * 2000-06-27 2002-01-03 Sandvik Ab Procede pour separer des joints entre composants de forage et perforatrice de roches
WO2008085114A1 (fr) * 2007-01-11 2008-07-17 Atlas Copco Rock Drills Ab Équipement de forage de roches et procédé en association avec celui-ci

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106413956B (zh) * 2014-05-20 2018-09-11 喜利得股份公司 抽吸装置
US10759035B2 (en) 2014-05-20 2020-09-01 Hilti Aktiengesellschaft Suction extraction device
CN106413956A (zh) * 2014-05-20 2017-02-15 喜利得股份公司 抽吸装置
US10294724B2 (en) 2016-06-22 2019-05-21 Sandvik Mining And Construction Oy Rock drill
AU2017203062B2 (en) * 2016-06-22 2018-07-19 Sandvik Mining And Construction Oy Rock drill
KR20180000298A (ko) * 2016-06-22 2018-01-02 산드빅 마이닝 앤드 컨스트럭션 오와이 착암기
CN107524408A (zh) * 2016-06-22 2017-12-29 山特维克矿山工程机械有限公司 凿岩机
EP3260647A1 (fr) * 2016-06-22 2017-12-27 Sandvik Mining and Construction Oy Perforatrice de roches
SE2050667A1 (en) * 2020-06-08 2021-12-09 Epiroc Rock Drills Ab Method and System for Diagnosing an Accumulator in a Hydraulic Circuit
FR3120248A1 (fr) * 2021-03-01 2022-09-02 Montabert Perforateur hydraulique roto-percutant pourvu d’un piston de butée et d’une chambre de freinage
EP4053374A1 (fr) * 2021-03-01 2022-09-07 Montabert Perforateur hydraulique roto-percutant pourvu d'un piston de butée et d'une chambre de freinage
US11999039B2 (en) 2021-03-01 2024-06-04 Montabert Rotary-percussive hydraulic perforator provided with a stop piston and a braking chamber
WO2023177330A1 (fr) * 2022-03-15 2023-09-21 Epiroc Rock Drills Aktiebolag Agencement d'amortissement et machine hydraulique de forage de roche

Also Published As

Publication number Publication date
CN104755230A (zh) 2015-07-01
CN104755230B (zh) 2016-09-21
SE1251214A1 (sv) 2014-04-30
SE536711C2 (sv) 2014-06-10
FI20155294A (fi) 2015-04-21
FI127509B (fi) 2018-08-15

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