EP0441172B1 - Rammvorrichtung - Google Patents

Rammvorrichtung Download PDF

Info

Publication number
EP0441172B1
EP0441172B1 EP91100788A EP91100788A EP0441172B1 EP 0441172 B1 EP0441172 B1 EP 0441172B1 EP 91100788 A EP91100788 A EP 91100788A EP 91100788 A EP91100788 A EP 91100788A EP 0441172 B1 EP0441172 B1 EP 0441172B1
Authority
EP
European Patent Office
Prior art keywords
control
piston
percussion piston
end portion
compressed air
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
EP91100788A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0441172A3 (en
EP0441172A2 (de
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 AT91100788T priority Critical patent/ATE99022T1/de
Publication of EP0441172A2 publication Critical patent/EP0441172A2/de
Publication of EP0441172A3 publication Critical patent/EP0441172A3/de
Application granted granted Critical
Publication of EP0441172B1 publication Critical patent/EP0441172B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 ramming device with a pneumatically driven percussion piston movable reciprocally in an axial direction in a housing and a control device which has a control part which is movable with the percussion piston and a control part which cooperates with the latter and is held on the housing and controls the pressurization of the percussion piston.
  • Such ramming devices are used, for example, to advance earth bores for cables and lines laid underground.
  • control device is usually formed by a tubular extension extending from the rear end of the percussion piston and a control sleeve which engages into the interior of the extension and which is supported on an axially extending support part on a rear end piece of the housing.
  • the control sleeve and the percussion piston with the tubular extension form a rear pressure chamber which is supplied with compressed air via a supply channel formed in the support part for the control sleeve and which causes the percussion piston to move forward.
  • a reversal of the drive direction can be achieved in the known device in that the control sleeve using a to the device connected compressed air hose is adjusted so that the front pressure chamber is pressurized earlier. The forward movement of the percussion piston is then cushioned, and at the end of the backward movement the percussion piston strikes the end piece so that an inward-directed pulse is transmitted to the housing.
  • the control sleeve is adjusted in the axial direction with the aid of a spindle drive by rotating the compressed air hose.
  • control sleeve is adjusted in the axial direction when the device is switched off by pulling or pushing the compressed air hose, or in which the control sleeve is provided with recesses which, by rotating the control sleeve with the aid of the compressed air hose, into one of the radial channels of the tubular Forzatzes corresponding position can be used (DE-C-31 04 547).
  • the main section of the percussion piston must have a certain length so that a sufficient inert mass of the percussion piston is achieved.
  • the length of the control section is determined by the stroke of the percussion piston and, if necessary, by the axial displacement of the control sleeve.
  • the end piece of the housing serves to fasten the supporting part and the control sleeve and must also withstand the impact of the percussion piston when driving the device in the backward direction, but is on the other hand weakened by the axial ventilation channels. This end piece must therefore also have a certain length for reasons of stability. For these reasons, the conventional devices have a relatively large overall length.
  • the invention has for its object to provide a ramming device which has a smaller overall length for a given mass of the percussion piston.
  • the housing-side control part is formed by the end piece of the housing, and that with the percussion piston movable control part is formed by a control piston projecting axially from the percussion piston, which plunges into an opening of the end piece.
  • the end piece is thus included in the control direction, so that compared to the prior art, the overall length of the percussion piston remains unchanged, and a reduction in the overall length is achieved, or a greater mass of the percussion piston is made possible with the overall length unchanged.
  • the rear pressure chamber formed between the main part of the percussion piston and the end piece is directly connected to the pressure source, and the pressure supply and ventilation of the front pressure chamber is controlled by control channels arranged radially in the control piston, which are connected to the front pressure chamber via an axial channel of the percussion piston are and are open to the rear pressure chamber in the front end position of the percussion piston.
  • a particularly simple and space-saving construction is achieved in that the end piece is provided with a through opening and the control piston projects so far rearward from the end piece in the rear end position of the percussion piston that the control channels are open to the atmosphere.
  • the end piece is provided with a branch line via which the control channels of the control piston can already be connected to the pressure source within the end piece. Compressed air can already be introduced into the front pressure chamber via this branch line before the percussion piston reaches its front end position. This dampens the forward movement of the percussion piston. If the control channels of the control piston pass through the end piece during the subsequent backward movement of the percussion piston, the front pressure chamber receives an additional pressure surge via the branch line, so that the backward stroke of the piston is extended.
  • the compressed air supply to the rear pressure chamber preferably takes place via an axial bore formed in the end piece, which defines the end of the compressed air hose receives and from which the branch line branches off in such a way that the mouth of the branch line can be opened and closed by moving or rotating the compressed air hose.
  • a ramming device shown in FIGS. 1 and 2 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 movably guided in the housing.
  • the percussion piston 16 is provided at the rear end with an axially projecting control piston 22, which plunges into an opening 24 of the end piece 14 and is slidably guided in this opening.
  • the control piston has radial control channels 26 which are connected to the front pressure chamber 18 via an axial channel 28.
  • a compressed air hose 30 is connected to the rear pressure chamber 20.
  • the front pressure chamber 18 When the percussion piston 16 is in the front end position shown in FIG. 1, the front pressure chamber 18 is supplied with compressed air via the compressed air hose 30, the rear pressure chamber 20, the radial control channels 26 and the axial channel 28.
  • the pressure in the front pressure chamber 18 acts on the entire cross-sectional area of the percussion piston 16, while the pressure prevailing in the rear chamber 20 acts only on the annular surface outside the control piston 22.
  • the percussion piston 16 is therefore moved in the reverse direction.
  • the control channels 26 enter the end piece 14 the compressed air supply for the front pressure chamber 18 is interrupted. Due to the inertia, the percussion piston 16 continues to move back until it reaches the position shown in FIG. 2.
  • control channels 26 are connected to the atmosphere outside the end piece 14, so that the front pressure chamber 18 is vented. Due to the pressure still prevailing in the rear pressure chamber 20, the percussion piston 16 is braked and driven in the forward direction. In the course of the forward movement, the percussion piston 16 is accelerated further, so that it strikes the front end of the housing 12 at high speed and transmits a propulsion impulse to the housing.
  • FIGS. 1 and 2 The ramming device shown in FIGS. 1 and 2 is preferably used only as a striking device outside of the ground because of the laterally connected compressed air hose 30.
  • FIGS. 3 to 6 show a ramming device which is suitable for use in the ground, since the compressed air hose 30 enters the housing axially from the rear. This device also offers the possibility of reversing the direction of advance by remote control.
  • the device according to FIGS. 3 to 6 differs from the previously described exemplary embodiment in the following features.
  • the compressed air hose 30 is rotatably held in an axial bore 32 of the end piece 14.
  • the axial bore 32 is connected via a radial bore 34 to an annular chamber 36 which surrounds the circumference of the control piston 22.
  • the compressed air hose 30 is provided with a lateral opening 38 which is in the same axial position as the radial bore 34. In the position shown in Figures 3, 4 and 5, however, the side opening 38 of the compressed air hose is turned away from the radial bore 34, so that the compressed air only enters the rear pressure chamber 20. In this position, the ramming device is driven in the forward direction, as described above in connection with Figures 1 and 2.
  • the lateral opening 38 of the compressed air hose is aligned with the radial bore 34 of the end piece, and the opening 38, the radial bore 34 and the annular chamber 36 form a branch line, via which the front one Pressure chamber 18 can be supplied with compressed air while the control channels 26 pass the end piece.
  • the front pressure chamber 18 is again supplied with compressed air as soon as the control channels 26 enter the annular chamber 36 again.
  • the forward movement of the percussion piston is thereby braked and finally reversed, so that the percussion piston does not strike the front end of the housing 12.
  • the length of the annular chamber 36 in the axial direction is selected so that braking and reversal of the movement of the percussion piston 16 can be achieved over this length. However, even if the percussion piston should shoot beyond the intended reverse position so that the control channels 26 are separated from the annular chamber 36, there is no malfunction. since in this case the air volume of the front pressure chamber 18 is compressed so that the percussion piston springs back elastically.
  • the direction of advance can be reversed in a simple manner due to the mode of operation described above, by rotating the compressed air hose 30 about its longitudinal axis.
  • the reversal can also be effected in that the compressed air hose 30 is displaced in the axial direction or at the same time is displaced and rotated.
  • a pull-out protection prevents the compressed air hose 30 from being pulled out of the end piece 14 entirely.
  • the reversal can also be effected via a valve arranged in the end piece 14, which is actuated by a cable or other remote control means or which switches over automatically when the pressure supply is switched off.
  • the end piece 14 is arranged directly at the end of the housing shell, so that the control piston 22 projects freely out of the housing in its rear end position.
  • the housing 12 can, however, also be extended beyond the end piece 14 to the rear, or further housing parts can be connected to the end piece at the rear.
  • a component with a sieve or a protective device it is possible to attach a component with a sieve or a protective device to prevent dirt from entering the machine body.
  • the term “end piece” in the sense of the present application is to be understood as a component which is located at the end of one of the pressure chambers, but not necessarily at the end of the housing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Surgical Instruments (AREA)
  • Stored Programmes (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Press Drives And Press Lines (AREA)
  • Catching Or Destruction (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
EP91100788A 1990-02-03 1991-01-23 Rammvorrichtung Expired - Lifetime EP0441172B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91100788T ATE99022T1 (de) 1990-02-03 1991-01-23 Rammvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4003189A DE4003189A1 (de) 1990-02-03 1990-02-03 Rammvorrichtung
DE4003189 1990-02-03

Publications (3)

Publication Number Publication Date
EP0441172A2 EP0441172A2 (de) 1991-08-14
EP0441172A3 EP0441172A3 (en) 1992-01-02
EP0441172B1 true EP0441172B1 (de) 1993-12-22

Family

ID=6399344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91100788A Expired - Lifetime EP0441172B1 (de) 1990-02-03 1991-01-23 Rammvorrichtung

Country Status (4)

Country Link
US (1) US5115717A (enrdf_load_stackoverflow)
EP (1) EP0441172B1 (enrdf_load_stackoverflow)
AT (1) ATE99022T1 (enrdf_load_stackoverflow)
DE (2) DE4003189A1 (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4143475C2 (de) * 1991-03-15 1997-05-28 Tracto Technik Schlaggerät, insbesondere selbstgetriebenes Rammbohrgerät
DE4114593C3 (de) * 1991-03-15 2002-03-07 Tracto Technik Schlaggerät, insbesondere selbstgetriebenes Rammbohrgerät
US6221313B1 (en) 1999-11-15 2001-04-24 North American Refractories Co. Taphole knockout device
US7156189B1 (en) * 2004-12-01 2007-01-02 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Self mountable and extractable ultrasonic/sonic anchor
EP1828534A4 (en) * 2004-12-07 2009-12-23 Byung-Duk Lim PERFORATING HAMMER AND TRAINING METHOD THEREOF
US8910727B2 (en) * 2006-02-03 2014-12-16 California Institute Of Technology Ultrasonic/sonic jackhammer
EP2963229B1 (en) * 2014-07-03 2017-05-31 Sandvik Mining and Construction Oy Control valve
NL2018206B1 (en) * 2017-01-20 2018-07-30 Van Dijk Maasland Groep B V Apparatus and method for stabilizing a foundation of a building
RU208325U1 (ru) * 2021-06-24 2021-12-14 Федеральное государственное бюджетное учреждение науки Институт горного дела им. Н.А. Чинакала Сибирского отделения Российской академии наук (ИГД СО РАН) Устройство ударного действия

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1929197A (en) * 1931-10-30 1933-10-03 Arthur L Bridgham Bell ringer
US3057331A (en) * 1959-02-18 1962-10-09 White Sales Corp Graham Pneumatic motor
AT337763B (de) * 1974-06-14 1977-07-25 Inst Gornogo Dela Sibirskogo O Pneumatische schlagvorrichtung
SU655824A1 (ru) * 1976-07-07 1979-04-05 Институт Горного Дела Со Ан Ссср Пневматическое ударное устройство дл бурени скважин
AT360432B (de) * 1977-03-28 1980-01-12 Inst Gornogo Dela Sibirskogo O Druckluft-schlagbohrgeraet zum herstellen von bohrloechern durch verdraengen des erdreiches
AT353185B (de) * 1978-06-17 1979-10-25 Inst Gornogo Dela Sibirskogo O Schlagartig wirkende druckluftein- richtung
DE3104547C1 (de) * 1981-02-10 1982-11-04 Gustav Dr.-Ing. 4300 Essen Jenne Steuervorrichtung fuer den Vor- und Ruecklauf von selbstgetriebenen pneumatischen Rammbohrgeraeten
DE8700076U1 (de) * 1987-01-02 1987-02-19 Hemmerle, Rainer, 5940 Lennestadt Rammbohrgerät
DE3710162C1 (de) * 1987-03-27 1988-09-29 Helmuth Dipl-Ing Roemer Rammbohrgeraet mit beweglichem Meissel

Also Published As

Publication number Publication date
US5115717A (en) 1992-05-26
EP0441172A3 (en) 1992-01-02
EP0441172A2 (de) 1991-08-14
DE4003189A1 (de) 1991-08-08
DE59100744D1 (de) 1994-02-03
ATE99022T1 (de) 1994-01-15
DE4003189C2 (enrdf_load_stackoverflow) 1992-09-10

Similar Documents

Publication Publication Date Title
DE19713154B4 (de) Schlagwerkzeug mit verringertem Stoß zum Beginn des Schlagbetriebs
EP0283734B1 (de) Rammbohrgerät mit beweglichem Meissel
DE2820785C2 (de) Ventilsteuerung für Rammbohrgeräte
EP0273139B1 (de) Rammbohrgerät
EP0441172B1 (de) Rammvorrichtung
DE3490666C2 (enrdf_load_stackoverflow)
DE19539412A1 (de) Umkehrbares pneumatisches Bodenstechwerkzeug
DE3315132A1 (de) Selbststeuernde umsteuerbare bohrramme
DE19858519A1 (de) Pneumatisch umsteuerbares Rammbohrgerät
DE3825800C2 (enrdf_load_stackoverflow)
WO2002044508A2 (de) Pneumatische felsbohrvorrichtung und verfahren zum horizontalen bohren mit druckluft und bohrmedium
DE3414190A1 (de) Pneumatisch betaetigtes mehrnadel-treibwerkzeug
DE3913866A1 (de) Hydraulisches schlagwerk
DE2107510C3 (de) Hydraulisches Schlagwerkzeug
DE1264304B (de) Hochdruckspritzpistole
DE102009038383B4 (de) Rammbohrvorrichtung
DE1289500B (de) Einrichtung zur Verhinderung der Leerlaufbetaetigung von Schlagwerkzeugen
DE4301382A1 (enrdf_load_stackoverflow)
DE2044643C3 (de) Druckgasschalter
DE102014011403A1 (de) Rammbohrgerät
EP0731248A1 (de) Schlaggerät
DE2857176C1 (de) Hydraulischer Antrieb fuer den Schuetzen einer Webmaschine
DE19546939C1 (de) Reversible Vorrichtung mit einer Schlageinrichtung
DE805896C (de) Selbsttaetige Weichenstell- und Signalanlage mit Druckluftantrieb, insbesondere fuerGrubenbahnen
DE2235618C3 (de) Automatische Steuerung der Druckmittelzufuhr zu einem Schlagbohrhammer

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE FR GB IT LI NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI NL

17P Request for examination filed

Effective date: 19920108

17Q First examination report despatched

Effective date: 19930514

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19931222

Ref country code: BE

Effective date: 19931222

REF Corresponds to:

Ref document number: 99022

Country of ref document: AT

Date of ref document: 19940115

Kind code of ref document: T

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19940123

ITF It: translation for a ep patent filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940128

Year of fee payment: 4

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19940131

Ref country code: CH

Effective date: 19940131

REF Corresponds to:

Ref document number: 59100744

Country of ref document: DE

Date of ref document: 19940203

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940203

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950123

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19950130

Year of fee payment: 5

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950929

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19961001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050123