EP0271631B1 - Rammbohrgerät - Google Patents

Rammbohrgerät Download PDF

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Publication number
EP0271631B1
EP0271631B1 EP19870106640 EP87106640A EP0271631B1 EP 0271631 B1 EP0271631 B1 EP 0271631B1 EP 19870106640 EP19870106640 EP 19870106640 EP 87106640 A EP87106640 A EP 87106640A EP 0271631 B1 EP0271631 B1 EP 0271631B1
Authority
EP
European Patent Office
Prior art keywords
boring machine
piston
ram boring
housing
valve
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
EP19870106640
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0271631A1 (de
Inventor
Paul Schmidt
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 AT87106640T priority Critical patent/ATE54995T1/de
Publication of EP0271631A1 publication Critical patent/EP0271631A1/de
Application granted granted Critical
Publication of EP0271631B1 publication Critical patent/EP0271631B1/de
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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7738—Pop valves

Definitions

  • the invention relates to a ram boring machine connected via a hose to a compressed air source and having an impact piston axially displaceable in a tubular housing and alternately pressurized with compressed air.
  • Such ram boring machines are primarily used to lay supply lines for water or electricity as well as telephone cables without having to tear up the pavement or sidewalks and dig a trench. They usually have a percussion tip which is actuated by a pneumatically operated percussion piston. To drive the percussion tip, the percussion piston is moved back and forth in a tubular housing, in that compressed air supplied via a compressed air line alternately acts on the front and rear end faces of the percussion piston.
  • the invention has for its object to provide a starting device for ram boring machines, which is effective even the longer compressed air hoses, so that they can start up without difficulty.
  • this object is achieved by a valve which is arranged upstream of the percussion piston and opens suddenly at a predetermined pressure.
  • This valve should be arranged as close as possible to the percussion piston and can therefore be arranged either in the housing of the device itself or in the hose between the device and the compressed air source close to the device.
  • Such a valve can be controlled either by compressed air, by hydraulic pressure or by gas pressure.
  • a prerequisite for its effectiveness is that a sufficiently high pressure builds up in front of the valve so that when the valve is suddenly opened, a pressure surge acts on the percussion piston in the implement, which immediately sets the working piston in motion.
  • the valve preferably has a control piston which can be moved in a sealed manner in the closed and in the. open state of differently sized hydraulic, gas or compressed air piston surfaces.
  • control piston In order to ensure that the valve opens suddenly at a predetermined pressure, the control piston is held in the direction of the closed position by means of a spring.
  • a tubular stepped piston which is guided in a sealed manner in the housing is closed at one end, is guided in a sealed manner in this area in the housing and has radial passage openings; it is provided at the other end with a piston part of larger diameter which is also sealed in the housing.
  • a ram boring machine 16 is connected via a compressed air hose 17 to a compressed air source, not shown.
  • a start valve 18 is arranged in the compressed air hose 17 close to the ram boring machine 16. This start valve 18 should be arranged as close as possible to the ram boring machine 16 so that the pressure wave reaches the percussion piston in the ram boring machine 16 as undamped as possible after the opening of the start valve 18.
  • the start valve 18 can therefore also be arranged both directly on the ram boring machine 16 and in the ram boring machine 16 itself.
  • the start valve 18 consists of a cylindrical housing 2, which is closed at one end by means of a valve plug.
  • a tubular piston 3 is arranged in the housing 2 and is surrounded by a compression spring 5 arranged in an annular space 4 of the housing 2.
  • the end of the valve plug 1 facing the housing interior forms a stop surface 7.
  • the housing 2 has a shoulder 8, which also serves as a stop.
  • the tubular piston 3 is sealed at one end in a bore 9, so that no compressed air can escape from radial passage openings 10 arranged in this area in the tubular piston 3. For this reason, the tubular piston 3 also has a closed end 15.
  • piston part 14 At the other end of the tubular piston 3 there is a piston part 14 of larger diameter, one end face 11 of which, in the position shown in FIG. 2, lies tightly against the stop surface 7 of the valve plug 1. With its opposite side 12, the piston part 14 comes to rest against a shoulder 8 in the housing 2 when it moves as in FIG. 3 under the influence of the compressed air.
  • the compressed air supplied via the hose connection 6 acts only on the inner surface of the tubular piston 3.
  • the air pressure rises, so that the pressure on the tubular one Piston 3 acting force exceeds the opposing force of the compression spring 5, the tubular piston 3 moves, so that the rear end 11 of the piston part 14 of larger diameter lifts from the stop surface 7.
  • the air pressure acts not only on the inner surface of the tubular piston 3, but also on the end face 11 of the piston part 14. Since the force acting on the tubular piston 3 and the piston part 14 is now considerably greater than the force of the compression spring 5, the tubular piston 3 moves suddenly with the piston part 14 into the position shown in FIG. 3.
  • the radial passage openings 10 pass from the area of the bore 9 into the area of the air duct 13, and the pressure wave which thereby develops hits the percussion piston of the ram boring machine 16 without noticeable damping, which sets in motion immediately, without the risk of standstill there is a dead center position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
EP19870106640 1986-12-13 1987-05-07 Rammbohrgerät Expired - Lifetime EP0271631B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87106640T ATE54995T1 (de) 1986-12-13 1987-05-07 Rammbohrgeraet.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3642696 1986-12-13
DE19863642696 DE3642696A1 (de) 1986-12-13 1986-12-13 Rammbohrgeraet

Publications (2)

Publication Number Publication Date
EP0271631A1 EP0271631A1 (de) 1988-06-22
EP0271631B1 true EP0271631B1 (de) 1990-07-25

Family

ID=6316163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870106640 Expired - Lifetime EP0271631B1 (de) 1986-12-13 1987-05-07 Rammbohrgerät

Country Status (5)

Country Link
US (1) US4833974A (enrdf_load_stackoverflow)
EP (1) EP0271631B1 (enrdf_load_stackoverflow)
JP (1) JPS63151789A (enrdf_load_stackoverflow)
AT (1) ATE54995T1 (enrdf_load_stackoverflow)
DE (1) DE3642696A1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4834193A (en) * 1987-12-22 1989-05-30 Gas Research Institute Earth boring apparatus and method with control valve
US4928775A (en) * 1988-12-30 1990-05-29 Gas Research Institute Downhole surge valve for earth boring apparatus
CA2194079C (en) * 1996-12-19 2005-11-29 Murray P. Craigmile Methods and apparatus for directionally drilling a bore and placing pipe
DE102009038383B4 (de) * 2009-08-24 2014-10-16 Tracto-Technik Gmbh & Co. Kg Rammbohrvorrichtung

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2287840A (en) * 1940-04-12 1942-06-30 United Shoe Machinery Corp Relief valve
US2747444A (en) * 1953-12-07 1956-05-29 Shepherd Paul Pneumatic peck hammer
US3048188A (en) * 1957-10-29 1962-08-07 Frank B Hunter Relief valve
US2964752A (en) * 1958-04-29 1960-12-20 Olin Mathieson Fluid operated tool
US3025869A (en) * 1959-07-07 1962-03-20 Bendix Westinghouse Automotive Fluid pressure valve mechanism
AT298354B (de) * 1966-08-09 1972-05-10 Inst Gornogo Dela Sibirskogo O Schlagvorrichtung zum Vortreiben von Hohlräumen im Erdboden
AT320531B (de) * 1967-03-14 1975-02-10 Inst Gornogo Dela Sibirskogo O Schlagvorr zum vortreiben von hohlraeumen im erdboden
US3616865A (en) * 1969-02-26 1971-11-02 Boris Vasilievich Sudnishnikov Pneumatic percussion device for making holes in the ground by packing the latter
AT308006B (de) * 1971-02-02 1973-06-25 Inst Gornogo Dela Sibirskogo O Umkehrbare schlagausübende Einrichtung zur Bildung von Löchern im Boden durch Bodenverdichtung
US4026192A (en) * 1971-11-12 1977-05-31 Atlas Copco Aktiebolag Motor driven by a pressurized fluid medium for operating an impacting tool in a linear direction
AT335921B (de) * 1973-01-15 1977-04-12 Inst Gornogo Dela Sibirskogo O Verfahren zur herstellung einer verdichteten, schalenformigen begrenzung einer bohrlochwandung und vorrichtung zur durchfuhrung des verfahrens
DE2356804A1 (de) * 1973-11-14 1975-05-28 Tracto Technik Rammbohrgeraet
US3996957A (en) * 1975-09-12 1976-12-14 Milton Industries, Inc. Inflator valve with pressure gauge and safety regulator
SU655824A1 (ru) * 1976-07-07 1979-04-05 Институт Горного Дела Со Ан Ссср Пневматическое ударное устройство дл бурени скважин
US4159040A (en) * 1976-10-27 1979-06-26 Institut Gornogo Dela Sibirskogo Oidelenia Akademii Nauk SSSR Pneumatic percussion tool
US4569271A (en) * 1982-06-11 1986-02-11 Lucas Industries Public Limited Company Hydraulic boosters for vehicle hydraulic systems
SE445434B (sv) * 1983-08-01 1986-06-23 Atlas Copco Ab Vibrationsdempat tryckfluiddrivet slagverk

Also Published As

Publication number Publication date
EP0271631A1 (de) 1988-06-22
ATE54995T1 (de) 1990-08-15
DE3642696A1 (de) 1988-06-16
US4833974A (en) 1989-05-30
JPS63151789A (ja) 1988-06-24
DE3642696C2 (enrdf_load_stackoverflow) 1991-06-20

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