EP2064033A1 - Dispositif d'impact hydraulique doté d'un accumulateur à pression - Google Patents

Dispositif d'impact hydraulique doté d'un accumulateur à pression

Info

Publication number
EP2064033A1
EP2064033A1 EP07808828A EP07808828A EP2064033A1 EP 2064033 A1 EP2064033 A1 EP 2064033A1 EP 07808828 A EP07808828 A EP 07808828A EP 07808828 A EP07808828 A EP 07808828A EP 2064033 A1 EP2064033 A1 EP 2064033A1
Authority
EP
European Patent Office
Prior art keywords
membrane
impact device
cylinder
disc element
bias spring
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.)
Granted
Application number
EP07808828A
Other languages
German (de)
English (en)
Other versions
EP2064033B1 (fr
EP2064033A4 (fr
Inventor
Peter Börje Sixten KARLSSON
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Construction Tools PC AB
Original Assignee
Atlas Copco Construction Tools 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 Construction Tools AB filed Critical Atlas Copco Construction Tools AB
Publication of EP2064033A1 publication Critical patent/EP2064033A1/fr
Publication of EP2064033A4 publication Critical patent/EP2064033A4/fr
Application granted granted Critical
Publication of EP2064033B1 publication Critical patent/EP2064033B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/12—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery
    • F15B1/14—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery by means of a rigid annular supporting member
    • 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
    • B25D9/145—Control devices for the reciprocating piston for hydraulically actuated hammers having an accumulator
    • 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
    • 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
    • B25D2250/371—Use of springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/21—Accumulator cushioning means using springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3158—Guides for the flexible separating means, e.g. for a collapsed bladder

Definitions

  • the invention relates to a hydraulic impact device including a housing with a cylinder, a hammer piston operating in the cylinder, a control system for directing motive hydraulic fluid to opposite ends of the cylinder to reciprocate the hammer piston, and a pressure accumulator for accumulating pressure energy during parts of the hammer piston operating cycle.
  • the invention concerns a hydraulic impact device of the above type wherein the pressure accumulator comprises a preloaded flexible membrane.
  • a problem concerned with pressure accumulators of the above described type is to make the flexible membrane last for a long service life, and in order to lessen the strains on the membrane there has previously been provided a movable support which also has the function of a valve means to block off the accumulator in certain operation sequences.
  • the movable support has been formed as a mushroom-like element with a domed head and a rod like stem, wherein the stem has served as a guide means for the support. Since, however, the accumulator suitably is located at the side of the cylinder and the guide stem has been directed perpendicularly to the cylinder the accumulator tends to increase the outer dimensions of the device undesirably.
  • the main object of the invention is to provide an improved hydraulic impact device wherein the pressure accumulator has a reduced lateral reach to keep down the outer dimensions of the entire impact device.
  • Fig. 1 shows a longitudinal section through a hydraulic impact device according to the invention.
  • Fig. 2 shows a fractional section of the device in Fig. 1.
  • the impact device illustrated in the drawing comprises a housing 10 with a cylinder 11 for guiding a hammer piston 13, and a front opening 12 with a with guide sleeve 14 coaxial with the cylinder 11 for receiving a working implement 15 like a breaker tool.
  • the device also comprises a control system for directing hydraulic fluid to the opposite ends of the cylinder 11 to reciprocate the hammer piston 12.
  • This control system includes a directional valve 18 for distributing the hydraulic fluid to the cylinder ends and a pressure accumulator 19 for absorbing pressure peaks in the system during operation of the hammer piston 12 and return pressure energy at certain points of the piston movement.
  • the pressure accumulator 19 comprises a casing 17 attached to the housing 10 and defining a pressure chamber 20.
  • the chamber 20 is divided into two compartments 20a and 20b by an elastic flexible membrane 21, whereof an outer compartment 20a is preloaded by a pressurized gas supplied via a nipple 22.
  • the other inner compartment 20b communicates with and forms a part of the hydraulic control system of the device and communicates with the cylinder 11 via a lateral opening 23.
  • a membrane support 24 having the purpose of protecting the membrane 21 against local strain due to pressure peaks and also to act as a valve element to control the opening 23.
  • the membrane support 24 comprises a contact portion in the form of a disc element 26 with a convex contact surface 27 facing the membrane 21, and a spring 28 for biasing the disc element 26 against the membrane 21.
  • the spring 28 is conical for being very compact when fully compressed at low pressure levels in the compartment 20b.
  • the spring 28 is positively located relative to the housing and the disc element 26 by having its smaller end supported around a tubular neck portion 29 on the housing wall and its bigger end engaged in a circular recess 30 in the disc element 26. This provides for a good guidance of the disc element 26 relative to the membrane 21 and the housing 10.
  • the spring 28 as a guide means for the membrane supporting disc element 26 instead of having the disc element provided with an integral stem as in previous accumulator designs results in a very compact accumulator 19 which brings down the lateral dimension of the impact device.
  • the conical shape of the spring 28 contributes to keep down the dimension of the accumulator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

Le dispositif d'impact hydraulique selon l'invention comprend un logement (10) doté d'un cylindre (11) et d'un piston de marteau (13) guidé dans le cylindre (11) et animé d'un mouvement de va-et-vient par un système hydraulique incluant un distributeur (18) et un accumulateur à pression (19). L'accumulateur à pression (19) comprend une chambre de pression (20) divisée en deux compartiments (20a, 20b) par une membrane souple élastique (21), et un support de membrane mobile (24) formé par un élément de disque (26) avec une surface de contact convexe, et un ressort (28) agissant à la fois en tant que moyens d'inclinaison et en tant que moyens de guidage pour l'élément de disque (26). Ledit ressort (28) est positivement situé par rapport à l'élément de disque (26) par un évidement circulaire (30) dans ce dernier et par une partie de collet tubulaire (29) sur le logement (10).
EP07808828A 2006-09-19 2007-09-19 Dispositif d'impact hydraulique doté d'un accumulateur à pression Active EP2064033B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0601923A SE530391C2 (sv) 2006-09-19 2006-09-19 Hydrauliskt slagverk med tryckackumulator
PCT/SE2007/000819 WO2008036019A1 (fr) 2006-09-19 2007-09-19 Dispositif d'impact hydraulique doté d'un accumulateur à pression

Publications (3)

Publication Number Publication Date
EP2064033A1 true EP2064033A1 (fr) 2009-06-03
EP2064033A4 EP2064033A4 (fr) 2011-05-11
EP2064033B1 EP2064033B1 (fr) 2012-12-19

Family

ID=39200759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07808828A Active EP2064033B1 (fr) 2006-09-19 2007-09-19 Dispositif d'impact hydraulique doté d'un accumulateur à pression

Country Status (4)

Country Link
EP (1) EP2064033B1 (fr)
ES (1) ES2398728T3 (fr)
SE (1) SE530391C2 (fr)
WO (1) WO2008036019A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200466458Y1 (ko) * 2009-11-11 2013-04-18 주식회사수산중공업 유압 타격장치용 어큐뮬레이터의 비정상 압력 해소장치
SE536382C2 (sv) 2012-02-17 2013-10-01 Atlas Copco Constr Tools Ab Tryckackumulator & slaganordning
CN109441382A (zh) * 2018-12-28 2019-03-08 易鲁川 一种水力锚

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE208557C (fr) * 1908-04-21
US3948288A (en) * 1974-12-13 1976-04-06 Gardner-Denver Company Hydraulic accumulator
SE462117B (sv) * 1984-05-24 1990-05-07 Atlas Copco Mct Ab Hydraulisk ackumulator vid ett hydrauliskt slagverk
JP3549501B2 (ja) * 2001-07-23 2004-08-04 カネキタ株式会社 エアパルサおよびそのエアパルサを利用する装置
SE526992C2 (sv) * 2004-03-12 2005-12-06 Atlas Copco Constr Tools Ab Hydraulisk tryckackumulator

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
No further relevant documents disclosed *
See also references of WO2008036019A1 *

Also Published As

Publication number Publication date
EP2064033B1 (fr) 2012-12-19
SE530391C2 (sv) 2008-05-20
EP2064033A4 (fr) 2011-05-11
SE0601923L (sv) 2008-03-20
WO2008036019A1 (fr) 2008-03-27
ES2398728T3 (es) 2013-03-21

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