WO1997004926A1 - Dispositif de battage, utilisant une pression hydraulique - Google Patents

Dispositif de battage, utilisant une pression hydraulique Download PDF

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Publication number
WO1997004926A1
WO1997004926A1 PCT/FI1996/000425 FI9600425W WO9704926A1 WO 1997004926 A1 WO1997004926 A1 WO 1997004926A1 FI 9600425 W FI9600425 W FI 9600425W WO 9704926 A1 WO9704926 A1 WO 9704926A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
mass
stroke
percussion
above patent
Prior art date
Application number
PCT/FI1996/000425
Other languages
English (en)
Inventor
Yrjö RAUNISTO
Original Assignee
Raunisto, Airi
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
Priority claimed from FI953636A external-priority patent/FI953636A0/fi
Priority claimed from FI960434A external-priority patent/FI960434A0/fi
Application filed by Raunisto, Airi filed Critical Raunisto, Airi
Priority to JP9507260A priority Critical patent/JPH11510101A/ja
Priority to EP96924904A priority patent/EP0885092A1/fr
Publication of WO1997004926A1 publication Critical patent/WO1997004926A1/fr

Links

Classifications

    • 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
    • B25D9/04—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously of the hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member
    • 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
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/02—Placing by driving
    • E02D7/06—Power-driven drivers
    • E02D7/10—Power-driven drivers with pressure-actuated hammer, i.e. the pressure fluid acting directly on the hammer structure

Definitions

  • the invention relates to a device generating strokes by a piston with linear travel according to the introductiory chapter of patent claim 1.
  • absorption pieces In connection with percussion devices absorption pieces are known, by means of which the stroke is transmitted absorbed and timely by some longer duration to the profile. As such elements wooden intermediate pieces are used, among others. Using absorption pieces the stroke is transferred as one impulse into the profile. The absorption can then be so great that the starting friction of profile cannot be overcome and the stroke remains ineffective. On the other hand, instead of absorption, the duration of stroke can remain so short that the impact of stroke stops before repercussion of profile and the profile does not, necessarily, be driven forward by the stroke.
  • the percussion device On driving long objects into the ground, the percussion device must be lifted up quite high over the top of the object and while the stroke advances, the device must be lowered again.
  • This job calls for an outreaching crane and a complicated starting, whereby a long object, for instance a pile, is first erected using auxiliary equipment. Not only by gripping the pile from its top can the percussion device lift a long pile into up-right position from the ground.
  • the advantage of the invention is a new type two-stage or multistage impact of stroke, at the shock peak of which initial stage the target object is "provoked” into motion or at least into a condition of vibration which, in the first place, corresponds to overcoming the starting friction.
  • the timing of the shock peak can be adjusted immediately after the former peak so that the object ist still moving or in condition of vibration and the starting friction overcome.
  • Fig. 2 is a mass with moving secondary mass.
  • Fig. 3 is a liquid mass.
  • Fig. 4 is a percussion device with an opening through its centre.
  • Figure 1 shows a hydraulic percussion device that has as inner part a ram 2 furnished with an annular shoulder 2, from which the strokes are transmitted to one of the longitudinal direct ⁇ ions.
  • Shoulder 2 around the ram has a travel distance between the stop faces in the piston 5.
  • the upper part of the ram is a flange with a shoulder 8, against whose annular face piston 5 hits its upward strokes.
  • the lower part of ram 8 has a flange against whose stop face 9 piston 5 hits its downward strokes.
  • the lower part of the ram has a pile-beating head 1 with gripping jaws, illustrated in this example as a possible percussion tool.
  • a cylider space is formed, into which hydraulic pressure is conveyed.
  • the rod has a shoulder 2 dividing the cylinder into two parts 3 and 4 and transmitting axial force to the rod.
  • the to-and-fro motions of piston 5 are achieved by a control system with a valve 12 that by means of electric steering turns most suitably the feeding direction of the hydraulic liquid to channels 10 and 11.
  • Valve 12 has a reversing function adjusted to work by observing the piston position each time.
  • the pressure source is a pump 13 and to the pressure line a hydraulic accumulator 14 is attached to ensure the speed of piston travel in order to produce accelerating motion for the piston and to reduce the effect of pressure shocks in the system.
  • the device in figure 1 is furnished with a piston, according to the invention, which has an annular free space inside of which a mass 7 is moving.
  • Mass 7 is a solid ring, for which a free travel space as big as distance X has been arranged with regard to the piston.
  • Piston 5 is accelerated to strike downward in steering pressure into chamber 4.
  • the stroke can be made to accelerate and for the piston a sufficient final velocity achieved before it hits shoulder 9.
  • Mass 7 follows piston 5 and produces in the second stage its own stroke on the lower part of piston 5 alredy leaning against shoulder 9.
  • the mass is solid, for instance of steel or lead, and the piston comprised of several parts, for instance a separate outer shell 6, for assembly reasons.
  • the mass can also be a ring totally outside the piston and its length and thickness easily adjusted and, accordinly, the travel distance X and the amount of mass as well.
  • the second stage stroke takes place with a delay that it takes the mass 5 to travel distance X.
  • the device produces two successive sharp strokes, whereby the first stroke makes the target profile move and the second stroke produces driving impact.
  • the time between the successive strokes is adjusted in changing the travel distance X or the piston speed.
  • the mass hits the piston while the target profile is moving or in the condition of vibration caused by the stroke.
  • absorption elements are added to shoulder 9, whereby the effective time of the stroke of both stages is lengthened.
  • absorbing pieces for instance wooden pieces known as such are used.
  • a space is formed for a secondary mass 15, which has a travel distance X' of its own inside mass 7 as shown in figure 2 and this mass 15 strikes with delay even after mass 7.
  • the mass is liquid 16 as per figure 3.
  • the liquid motion can be delayed by chokers 17, whereat the pressure stroke can also be delayed.
  • the chokers may slow down the flow of liquid even during return travel, but the effect is small if the choking point is close to the stroke wall, in this case the piston lower edge.
  • liquid water mercury or other heavy liquids can be used.
  • the mass can be granulitic, whereby the stroke becomes distinctly absorbed, for instance compared with a solid mass, already without any retarders.
  • Used granulated material can be electrically charged, whereat a steered motion of the granulated material is achieved, for instance pulling and pushing towards the piston head, and it is possible to produce effect on the return travel of the granulated material or its motion in the stroke direction.
  • the mass 7,16 or masses 7 and 15 shift over to the piston upper part, where they arrive not later than by the delay, which it takes them accord-ing to the law of continuity, when the piston has already stopped in the upper position or the corresponding upper turning point.
  • the mass hits the piston upper part, it is due time to start the piston travel for a new stroke. Steering of valve 12 is carried out with this delay. After the stroke, the piston return travel is started when the mass or the masses have hit the piston lower part.
  • the device in figure 1 can be steered to strike according to the invention also in the opposite direction only by changing the control of valve 12.
  • Tool 1 can also be replaced by other striking tools, as for instance a striking pike.
  • Figure 4 shows a percussion device with an annular body 22.
  • the percussion profile, as tube 25, is placed from the opening running through the body, whereby the percussion device is located around the the profile.
  • the percussion device has a ring shaped piston 19 moving to-and-fro.
  • the alternating piston motions are achieved by means of the control system as per figure 1. It is possible to strike in both directions with the piston.
  • the percussion profile 25 is centrally inside the body 22.
  • the profile is attached with movable wedges 20, which press against the profile body 22.
  • the wedges 20 are moved for instance by means of hydraulic cylinders 21.
  • the strokes of piston 19 increase the wedge effect and the percussion profile sticks reliably to the body.
  • the form of the wedge pieces can alterate according to the profiles so that it is possible to strike different kinds of profiles, tubes, piles, beams etc only in changing wedge pie ⁇ ces.
  • a support element 23 can be installed, which is tightened or expanded by some power unit, for instance a hydraulic cylinder 24.
  • the support can be placed or moved into a required location by a wire rope or a winch.
  • the percussion device is by means of rubber pillows attached to the outer body of the percussion body 27.
  • the outer body is attached to the excavator in place of the scoop.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Actuator (AREA)

Abstract

L'invention concerne un dispositif de battage utilisant une pression hydraulique et pouvant fonctionner à volonté dans les deux sens. Ce dispositif comprend un piston (5) pouvant fonctionner dans les deux sens et dont le déplacement est commandé en modifiant la pression hydraulique par une vanne réversible (12). Cette pression hydraulique agit sur les faces transversales opposées du piston (5). Les extrémités opposées du piston fonctionnent comme faces de transmission de la force de percussion. Le piston (5, 19) a une forme annulaire avec un espace cylindrique (4, 26) dans lequel est logée au moins une portion du corps (2, 22) de transmission de la force de percussion. Cette portion de corps sert à fixer un outil (1) ou un objet cible (25).
PCT/FI1996/000425 1995-07-31 1996-07-31 Dispositif de battage, utilisant une pression hydraulique WO1997004926A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP9507260A JPH11510101A (ja) 1995-07-31 1996-07-31 油圧による打撃装置
EP96924904A EP0885092A1 (fr) 1995-07-31 1996-07-31 Dispositif de battage, utilisant une pression hydraulique

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FI953636A FI953636A0 (fi) 1995-07-31 1995-07-31 Medelst hydrauliskt tryck slag alstrande anordning
FI953636 1995-07-31
FI960434 1996-01-30
FI960434A FI960434A0 (fi) 1995-03-31 1996-01-30 Slaganordning som arbetar med hydrauliskt tryck

Publications (1)

Publication Number Publication Date
WO1997004926A1 true WO1997004926A1 (fr) 1997-02-13

Family

ID=26160002

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1996/000425 WO1997004926A1 (fr) 1995-07-31 1996-07-31 Dispositif de battage, utilisant une pression hydraulique

Country Status (4)

Country Link
EP (1) EP0885092A1 (fr)
JP (1) JPH11510101A (fr)
KR (1) KR19990036100A (fr)
WO (1) WO1997004926A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0900884A1 (fr) * 1997-09-02 1999-03-10 Rammsondierung Sigg Ag Sonnette, en particulier pour sondage par percussion
WO2000029678A1 (fr) * 1998-11-14 2000-05-25 Aldridge Piling Equipment (Hire) Company Limited Actionneur
WO2003097945A1 (fr) * 2002-05-17 2003-11-27 Raunisto Yrjoe Dispositif de martelage
RU2703029C1 (ru) * 2019-05-30 2019-10-15 Федеральное государственное бюджетное учреждение науки Институт горного дела им. Н.А. Чинакала Сибирского отделения Российской академии наук Устройство для поинтервального гидроразрыва прочных горных пород

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT511810B1 (de) * 2011-09-27 2013-03-15 Tmt Bbg Res And Dev Gmbh Schlagwerk für eine hammereinrichtung und verfahren zum offenstellen einer abstichöffnung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026193A (en) * 1974-09-19 1977-05-31 Raymond International Inc. Hydraulically driven hammer system
US4478293A (en) * 1981-06-10 1984-10-23 Hilti Aktiengesellschaft Hammer drill or chipping hammer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026193A (en) * 1974-09-19 1977-05-31 Raymond International Inc. Hydraulically driven hammer system
US4478293A (en) * 1981-06-10 1984-10-23 Hilti Aktiengesellschaft Hammer drill or chipping hammer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DERWENT'S ABSTRACT, No. 87-141896/20, week 8720; & SU,A,1 260 177 (NIIMOSSTROI RES. INS.), 30 Sept. 1986. *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0900884A1 (fr) * 1997-09-02 1999-03-10 Rammsondierung Sigg Ag Sonnette, en particulier pour sondage par percussion
WO2000029678A1 (fr) * 1998-11-14 2000-05-25 Aldridge Piling Equipment (Hire) Company Limited Actionneur
WO2003097945A1 (fr) * 2002-05-17 2003-11-27 Raunisto Yrjoe Dispositif de martelage
RU2703029C1 (ru) * 2019-05-30 2019-10-15 Федеральное государственное бюджетное учреждение науки Институт горного дела им. Н.А. Чинакала Сибирского отделения Российской академии наук Устройство для поинтервального гидроразрыва прочных горных пород

Also Published As

Publication number Publication date
JPH11510101A (ja) 1999-09-07
EP0885092A1 (fr) 1998-12-23
KR19990036100A (ko) 1999-05-25

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