EP0273139B1 - Mouton de forage - Google Patents

Mouton de forage Download PDF

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Publication number
EP0273139B1
EP0273139B1 EP87116081A EP87116081A EP0273139B1 EP 0273139 B1 EP0273139 B1 EP 0273139B1 EP 87116081 A EP87116081 A EP 87116081A EP 87116081 A EP87116081 A EP 87116081A EP 0273139 B1 EP0273139 B1 EP 0273139B1
Authority
EP
European Patent Office
Prior art keywords
control sleeve
housing
pressure
boring ram
spindle drive
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 - Lifetime
Application number
EP87116081A
Other languages
German (de)
English (en)
Other versions
EP0273139A3 (en
EP0273139A2 (fr
Inventor
Helmuth Römer
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT87116081T priority Critical patent/ATE75522T1/de
Publication of EP0273139A2 publication Critical patent/EP0273139A2/fr
Publication of EP0273139A3 publication Critical patent/EP0273139A3/de
Application granted granted Critical
Publication of EP0273139B1 publication Critical patent/EP0273139B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers
    • E21B4/145—Fluid operated hammers of the self propelled-type, e.g. with a reverse mode to retract the device from the hole

Definitions

  • the invention relates to a ram boring machine with a pneumatically driven percussion piston movable reciprocally in a housing, a control sleeve axially adjustable to reverse the direction of movement of the ram boring machine, which is acted upon by the pressure in one of the pressure chambers formed on both sides of the percussion piston, and one Spindle drive with which the control sleeve can be adjusted by turning a compressed air supply hose.
  • Such ram boring machines are used to advance earth bores for underground cables and the like.
  • the percussion piston has a tubular section which is displaceable on the control sleeve and is provided in the peripheral wall of this tubular section with radial channels which are periodically opened and closed by the control sleeve during the oscillating movement of the percussion piston. In this way, the compressed air supply to the pressure chambers for driving the percussion piston is controlled.
  • the control sleeve When the control sleeve is in a forward position, the percussion piston strikes the forward end of the housing during its forward stroke, so that impulse is transmitted to the housing and the ram boring machine is driven in the forward direction.
  • control sleeve is rigidly connected to the compressed air supply hose.
  • the spindle drive for adjusting the control sleeve is formed by an external thread formed on the control sleeve, which is in engagement with a component rigidly connected to the housing.
  • the pressure chamber located on the rear side of the percussion piston is formed in the tubular section of the percussion piston and is limited to the rear by the cup-shaped control sleeve. Therefore, when this pressure chamber is pressurized during the forward stroke of the percussion piston, a relatively large backward force acts on the control sleeve. For this reason, switching from backward movement to forward movement can only be carried out by axially moving the control sleeve forward when the compressed air supply is switched off.
  • the thread of the spindle drive may only have a small pitch so that the relatively large axial forces can be reliably absorbed.
  • the invention has for its object to design a ram boring machine of the type mentioned in such a way that the direction of movement can be switched quickly and safely both from forward drive to reverse drive and from reverse drive to forward drive without the compressed air supply having to be switched off for this purpose.
  • control sleeve is supported on an axially fixed to the housing Core is arranged and forms an annular pressurized active surface.
  • the effective area of the control sleeve which is supplied with compressed air during the forward stroke of the percussion piston, is considerably reduced, so that the control sleeve only has to absorb correspondingly small axial forces.
  • These small axial forces can be easily overcome when adjusting the control sleeve, so that the control sleeve can be easily adjusted even when the ram boring machine is running. Since the axial forces are only small, the spindle drive can have a relatively large thread pitch without the control sleeve automatically adjusting itself when the device is running. When reversing the direction, the compressed air hose therefore only needs to be turned a few turns or not even a full turn.
  • a ram boring machine is already known from DE-C-21 57 259, in which the control sleeve is arranged on an axially fixed core and has only an annular, pressurized surface. However, the direction is not reversed with the aid of a spindle drive, but directly by axially displacing the control sleeve with the help of the compressed air hose.
  • the control sleeve is locked in the forward position with the aid of a locking device.
  • the locking device is released using a cable.
  • the effective area of the control sleeve is so large in this device that the control sleeve is pneumatically moved backwards after loosening the control device.
  • the compressed air supply must be interrupted so that the control sleeve moves forward again and can be locked.
  • the principle according to the invention is not implemented to reduce the effective area of the control sleeve so that it can be moved forward against the working pressure.
  • a ram boring machine has a housing 12 provided with a striking tip 10, which is closed at the rear end by an end piece 14.
  • a front pressure chamber 18 and a rear pressure chamber 20 are formed in the interior of the housing 12 by an impact piston 16 which is axially movable in the housing.
  • the rear pressure chamber 20 is located in a tubular section 22 of the percussion piston 16, which is slidable on a control sleeve 24.
  • a compressed air hose 26 for supplying compressed air to the ram boring machine is connected in a rotationally fixed manner to a control tube 30, which is rotatably supported in the end piece 14 and is supported in the axial direction on a shoulder 32 of the end piece.
  • the control tube 30 is surrounded at the front end by a rubber-elastic buffer element 34 which is in sealing contact with the inner wall of a thin-walled cylindrical section of the control sleeve 24.
  • the rear pressure chamber 20 is thus bounded rearwards by the control tube 30, the buffer element 34 and the thin-walled cylindrical section of the control sleeve 24.
  • a rear portion 36 of the control sleeve is threadedly engaged with the control tube 30.
  • the control sleeve 24 is biased forward by a right-handed helical compression spring 38 supported on the end piece 14 and has ventilation channels 40 for ventilating the cavity 42 inside the control sleeve, which is delimited by the buffer element 34.
  • the tubular portion 22 of the percussion piston 16 is provided with radial channels 44 and the end piece 14 has axial air channels 46 which are in fluid communication with the interior of the tubular portion 22 of the percussion piston.
  • the front pressure chamber 18 is relieved of pressure via axial channels 48 of the control piston, via the radial channels 44 and the axial channels 46 of the end piece 14.
  • the percussion piston 16 moves forward.
  • the radial channels 44 are temporarily closed by the control sleeve 24 and then come into fluid communication with the rear pressure chamber 20, so that the compressed air passes through the radial channels 44 and axial channels 48 spreads into the front pressure chamber 18. Since the effective area of the percussion piston 16 with respect to the front pressure chamber 18 is larger than with respect to the rear pressure chamber 20, the piston is braked and moved back again so that it does not strike the front end of the housing 12. At the end of its backward stroke, the percussion piston 16 strikes the rear end piece 14 of the housing and gives the housing a pulse backwards. The operations described above are repeated periodically so that the ram boring machine is driven in the reverse direction as a whole.
  • the control sleeve 24 is adjusted by rotating the compressed air hose 26 by hand, for example.
  • the thread 50 of the rear section 36 of the control sleeve and the control tube 30 is, for example, a four-start thread with an axial pitch of 10 mm.
  • the pitch of a single gear is thus 40mm, so that the control sleeve can be adjusted by only one to three turns around the entire displacement x ( Figure 3). Since the effective area of the control sleeve 24 facing the pressure camera 20 is only very small, the control sleeve can be adjusted forwards against the pressure prevailing in the pressure chamber 20 while the ram boring machine is running.
  • the helical compression spring 38 supports the forward movement of the control sleeve and at the same time forms a rotation lock which prevents the control sleeve from moving turns when turning the head tube 30.
  • a different rotation lock can also be provided.
  • control sleeve 24 If there is a high pressure in the pressure chamber 20, a relatively low axial force acts on the control sleeve 24, which tends to twist the control tube 30 due to the action of the thread. At the same time, however, a substantially greater axial force acts directly on the head tube 30, so that rotation of the head tube due to the friction between the head tube and the shoulder 32 is prevented. In this way, the control sleeve 24 is held self-locking in the respective position despite the relatively large thread pitch.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Stored Programmes (AREA)
  • Surgical Instruments (AREA)

Claims (8)

  1. Mouton de forage, comprenant un piston frappeur (16) entraîné pneumatiquement et effectuant à l'intérieur du carter (12) des mouvements alternatifs dans le sens axial, une douille de commande (24) déplaçable dans le sens axial pour inverser la direction de mouvement du mouton de forage et sollicitée par la pression dans l'une (20) des chambres de compression (18, 20) formées des deux côtés du piston frappeur (16), et une commande de broche (30, 50) qui permet le déplacement de la douille de commande (24) par la rotation d'un tuyau d'alimentation en air comprimé (26), caractérisé en ce en ce que la douille de commande (24) est montée sur un noyau (30, 34) qui s'appuie sur le carter (12) de manière immobile dans le sens axial et constitue une surface active annulaire (52) alimentée en pression dont la superficie est suffisamment faible pour que la force axiale exercée sur ladite surface par la pression à l'intérieur de la chambre de compression puisse être vaincue par la commande de broche.
  2. Mouton de forage selon la revendication 1, caractérisé en ce que la douille de commande (24) est maintenue bloquée en rotation par rapport au carter (12), et que la commande de broche est constituée par un élément (30) du noyau (30, 34) qui peut tourner par rapport au carter et coopère au moyen d'un filetage avec la douille de commande (24).
  3. Mouton de forage selon la revendication 2, caractérisé en ce qu'il comprend pour le blocage en rotation de la douille filetée (24), un ressort cylindrique de compression (38) qui prend appui sur un élément postérieur (14) du carter et assure une précontrainte de la douille de commande (24) en direction de la chambre de compression (20).
  4. Mouton de forage selon l'une des revendications 2 ou 3, caractérisé en ce que le noyau est constitué par un tube de commande (30) raccordé au tuyau d'alimentation en air comprimé (26) et par un élément tampon (34) élastique monté sur l'extrémité libre du tube de commande et appliqué contre la face intérieure de la douille de commande (24).
  5. Mouton de forage selon l'une des revendications précédentes, caractérisé en ce que le pas de vis de la commande de broche (30, 50) est choisi de façon que la douille de commande (24) est maintenue de manière autobloquante contre la pression agissant sur la surface active (52) de la douille de commande.
  6. Mouton de forage selon l'une des revendications précédentes, caractérisé en ce que le pas de la commande de broche est d'au moins 5 mm.
  7. Mouton de forage selon la revendication 6, caractérisé en ce que le filetage (50) est un filetage à filets multiples, de préférence quadruple.
  8. Mouton de forage selon la revendication 7, caractérisé en ce que le pas du filetage (50) est de 20 à 40 mm pour chaque pas de vis individuel.
EP87116081A 1987-01-02 1987-11-02 Mouton de forage Expired - Lifetime EP0273139B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87116081T ATE75522T1 (de) 1987-01-02 1987-11-02 Rammbohrgeraet.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8700076U 1987-01-02
DE8700076U DE8700076U1 (de) 1987-01-02 1987-01-02 Rammbohrgerät

Publications (3)

Publication Number Publication Date
EP0273139A2 EP0273139A2 (fr) 1988-07-06
EP0273139A3 EP0273139A3 (en) 1989-06-28
EP0273139B1 true EP0273139B1 (fr) 1992-04-29

Family

ID=6803263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87116081A Expired - Lifetime EP0273139B1 (fr) 1987-01-02 1987-11-02 Mouton de forage

Country Status (4)

Country Link
US (1) US4840237A (fr)
EP (1) EP0273139B1 (fr)
AT (1) ATE75522T1 (fr)
DE (2) DE8700076U1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5108400A (en) * 1988-01-21 1992-04-28 Aesculap Ag Striking tool for surgical instruments
DE3909567A1 (de) * 1989-03-23 1990-09-27 Schmidt Paul Rammbohrgeraet
DE4003189A1 (de) * 1990-02-03 1991-08-08 Roemer Helmuth Rammvorrichtung
US5172771A (en) * 1990-11-06 1992-12-22 Charles Machine Works, Inc. Reversible impact-operated boring tool
US5109932A (en) * 1990-12-10 1992-05-05 Industrial Engineering, Inc. Impact borer, connector for embedding lines, anchoring cables, and sinking wells
US5253722A (en) * 1990-12-10 1993-10-19 Laffkas Harry P Impact borer for embedding lines, anchoring cables and sinking wells
DE4114593C3 (de) * 1991-03-15 2002-03-07 Tracto Technik Schlaggerät, insbesondere selbstgetriebenes Rammbohrgerät
DE4143475C2 (de) * 1991-03-15 1997-05-28 Tracto Technik Schlaggerät, insbesondere selbstgetriebenes Rammbohrgerät
DE4308547C1 (de) * 1993-03-17 1994-04-28 Kipp Jens Werner Verfahren und Vorrichtung zum Verlegen von Rohren durch Pressen und gleichzeitiges Rammen
ATE169205T1 (de) * 1993-03-30 1998-08-15 Integral Medizintechnik Pneumatisches schlagwerkzeug
US5603383A (en) * 1995-09-25 1997-02-18 Earth Tool Corporation Reversible pneumatic ground piercing tool
US5816342A (en) * 1997-01-27 1998-10-06 Columbia Gas Distribution Companies Small diameter impact boring tool
EP2277469B1 (fr) * 2005-05-17 2012-09-19 IMT Integral Medizintechnik AG Outil de percussion, notamment pour l'utilisation chirurgicale
US7681658B2 (en) 2007-11-06 2010-03-23 Maurice DUVAL Pneumatic impact tool
DE102015008339A1 (de) * 2015-07-01 2017-01-05 Tracto-Technik Gmbh & Co. Kg "Rammbohrvorrichtung und Verfahren zum Umsteuern einer Rammbohrvorrichtung"
CN116677316B (zh) * 2023-08-04 2023-10-31 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) 一种物质勘探用冲击式岩层钻进机构

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE695405A (fr) * 1967-03-14 1967-09-13
US3551874A (en) * 1968-07-31 1970-12-29 Amp Inc Multiple coaxial connector
US3616865A (en) * 1969-02-26 1971-11-02 Boris Vasilievich Sudnishnikov Pneumatic percussion device for making holes in the ground by packing the latter
DE2157259C3 (de) * 1971-11-18 1973-06-07 Tracto Technik Rammbohrgerät
AT334831B (de) * 1975-07-08 1976-02-10 Inst Gornogo Dela Sibirskogo O Umkehrbare pressluft-schlagvorrichtung zur bildung von bohrlochern im boden durch verdichten desselben
SU652279A1 (ru) * 1975-10-01 1979-03-15 Институт Горного Дела Со Ан Ссср Устройство ударного действи дл образовани скважин в грунте
GB2134152B (en) * 1983-01-22 1986-05-08 Kayes Engineering Limited Improvements in and relating to impact-action self-propelled mechanism for driving holes in the earth
SU1313973A1 (ru) * 1984-06-20 1987-05-30 Институт Горного Дела Со Ан Ссср Пневматическое реверсивное устройство ударного действи дл проходки скважин в грунте
US4662457A (en) * 1984-10-19 1987-05-05 Allied Steel & Tractor Products, Inc. Reversible underground piercing device
US4609052A (en) * 1984-11-29 1986-09-02 Lewin Stephen S Pneumatically operated burrowing tool

Also Published As

Publication number Publication date
DE3778668D1 (de) 1992-06-04
US4840237A (en) 1989-06-20
EP0273139A3 (en) 1989-06-28
EP0273139A2 (fr) 1988-07-06
ATE75522T1 (de) 1992-05-15
DE8700076U1 (de) 1987-02-19

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