EP3215704A1 - Drilling ram device - Google Patents

Drilling ram device

Info

Publication number
EP3215704A1
EP3215704A1 EP15812946.0A EP15812946A EP3215704A1 EP 3215704 A1 EP3215704 A1 EP 3215704A1 EP 15812946 A EP15812946 A EP 15812946A EP 3215704 A1 EP3215704 A1 EP 3215704A1
Authority
EP
European Patent Office
Prior art keywords
ring insert
housing
percussion piston
drill head
ram boring
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
EP15812946.0A
Other languages
German (de)
French (fr)
Other versions
EP3215704B1 (en
Inventor
Franz-Josef Püttmann
Sadri SAMADRAXHA
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.)
Tracto Technik GmbH and Co KG
Original Assignee
Tracto Technik GmbH and Co KG
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 Tracto Technik GmbH and Co KG filed Critical Tracto Technik GmbH and Co KG
Priority to PL15812946T priority Critical patent/PL3215704T3/en
Publication of EP3215704A1 publication Critical patent/EP3215704A1/en
Application granted granted Critical
Publication of EP3215704B1 publication Critical patent/EP3215704B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/26—Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • 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
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B1/00—Percussion drilling
    • E21B1/38—Hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B6/00—Drives for drilling with combined rotary and percussive action

Definitions

  • the invention relates to a ram boring device according to claim 1 and to a method for producing a ram boring device according to claim 9.
  • Ramm boring devices are known in the art and are used in particular for the production of horizontal wells.
  • Ramm boring devices are self-propelled boring devices.
  • such Rammbohrvorraum has a percussion piston which is oscillated (reciprocating) within a housing and thereby, depending on the desired direction of movement of the ram boring device, bounces on a front or rear impact surface of the housing.
  • the transmitted kinetic energy of the percussion piston ensures an acceleration of the ram boring device within the soil.
  • Such a ram boring device is known, for example, from DE 10 2009 038 383 A1.
  • the housing of the ram boring device known from DE 10 2009 038 383 A1 is made of two parts. In one part, i. the rear part, the percussion piston oscillates. The other part, i. the front part, has the drill head and is acted upon by the percussion piston. The two parts are joined together by friction welding.
  • the rear part is a tube made of structural steel, which for the production of a housing portion of a ram boring a
  • CONFIRMATION COPY having predetermined inner diameter.
  • the front part is usually made of solid and is made of high quality steel, since the forces of the percussion piston act. After friction welding, the friction weld must be turned out consuming, so that the piston can be moved forward without an obstacle. After unscrewing the friction weld, the outer contour of the housing is also finished, so that all threads and other contours lie on one axis.
  • the invention is based on the object of improving a ram boring device and a method for producing a ram boring device such that a simpler structure is made possible.
  • the essence of the invention is to provide a ring insert in the impact section of the piston in the housing, which reduces the open cross-section of the housing in the region of the end of a Bohrkopf dictate acted upon by the percussion piston.
  • the outer and inner contour of the ram boring machine can be produced separately from the ring insert used or to be used. Previous considerations were that the entire front part must be made of a higher quality material with a one-piece connection between the outer contour and the impact surface for the piston. These well-thought-out considerations were overcome.
  • the ring insert is arranged in the housing such that it transmits at least a portion of the energy of the percussion piston to the housing.
  • the ring insert may itself have an impact surface for the percussion piston and in this way transmit the mechanical energy of the percussion piston impinging on the impact surface.
  • the mechanical energy can also be transmitted indirectly, for example by means of a drill head or drill bit, which is acted upon by the percussion piston, on the ring insert.
  • the housing can be made for example of a tube. A costly and expensive turning out a friction weld is no longer necessary. A previously contracted to third party friction welding can be omitted. The production time is reduced. The otherwise required mechanical machining Treatments - eg honing after the usual friction welding - are no longer necessary.
  • the ring insert can be arranged in the region of the impact surface for the percussion piston.
  • the ring insert may further comprise the impact surface for the percussion piston of the ram boring machine.
  • the corresponding housing section then no longer has to be machined mechanically after inserting the ring insert.
  • the ring insert may also be rigidly or movably connected to the drill head tip, wherein the drill head tip may have the impact surface for the percussion piston, which in turn transmits the mechanical energy of the percussion piston on the ring insert and thus on the housing.
  • ram boring device includes both earth displacement devices in which the drill head tip is fixedly connected to the housing and ram boring devices with axial drill head tip displaceably mounted independently of the housing
  • a two-stroke device first of all the percussion piston strikes the drill head point leading in the first cycle
  • a two-cycle device a better energy conversion takes place, which in particular facilitates the destruction of obstacles due to the concentration of the impact pulse on the drill bit tip ubweg of the drill head vorseilenden soil displacement, the housing remains in a quiet location, thereby ensuring a relatively good running stability.
  • the ram boring device according to the invention is not limited to underground earthworks.
  • lines in which a Erdbohr réelle is operated run above ground.
  • the term "horizontal drilling" in the context of the present invention covers in particular any type of existing or to be created, preferably horizontal channels in a body, in particular earth channels including earth boreholes, rock holes or ground lines and underground or above-ground pipelines and sewers, which are characterized by use of a corresponding Rammbohrvorraum make, widen, destroy, cut or clean.
  • ring insert is not limited to a classic ring shape, so it can also have a different shape than the circular shape or be interrupted.
  • the ring insert may have an outer contour shape, which corresponds substantially to the inner contour shape of the section in which the ring insert It can be provided that the outer contour shape of the ring insert has an envelope which essentially corresponds to the inner contour shape of the section in which the ring insert is inserted.
  • the ring insert is held in the section by means of a shrink connection.
  • a shrink connection This creates a very simple and cost-effective way to fix the ring insert in the section or to connect with this.
  • the ring insert on an outer contour, which has a larger dimension than a corresponding dimension of the inner contour of the housing portion without arranged in the housing portion ring insert.
  • the ring insert can be inserted into the housing section by creating a temperature difference between the ring insert and the housing section, whereby the inner diameter is temporarily increased and / or the outer contour is temporarily reduced. This can be done, for example, by externally applied heat or cold introduced from the inside.
  • the term "shrink connection" encompasses any type of connection that provides a means of placing the slightly larger ring insert in the inner diameter of the housing section A shrink connection occurs due to an oversize of the nested parts.
  • the portion in which the ring insert is held has a circular diameter.
  • the production can be simplified, since the ring insert can be used to the section rotationally invariant. It can be dispensed with a preferred situation when introducing the ring insert.
  • the ring insert may also be formed as part of the drill head or be present separately from this.
  • the ring insert can be arranged on the end side of the drill head.
  • the ring insert can be arranged at the end in the housing section of the drill head or the drill head tip.
  • the end arranged in the housing section Nete ring insert can be used in front of the housing section for the percussion piston.
  • the ring insert has a different material than the housing.
  • the possibility can be created to take into account the individual requirements of the ring insert, which may have an impact surface for the percussion piston, and the housing.
  • the term "comprising" in the context of the invention encompasses the fact that a material or a component is present (the pure sense of the term), but also that the element referred to consists of the material, any impurities or residual constituents being present could be.
  • the ram boring apparatus comprises a ring insert comprising a material which is heat treated.
  • different properties can be set by means of the heat treatment, depending on which heat treatment of the material has been carried out. Different heat treatments can lead to different properties.
  • the heat treatment may be such as to cause a sweeping microstructural transformation (annealing or hardening) and / or only a transformation on the surface of a workpiece (diffusion or coating process).
  • the different heat treatments can be detected for example by means of a micrograph.
  • FIG. 1 shows a front region of a ram boring device according to the invention in a sectional side view in a first embodiment.
  • FIG. 2 shows a front region of a ram boring device according to the invention in a sectional side view in a second embodiment
  • FIG 3 shows a front region of a ram boring device according to the invention in a sectional side view in a third embodiment
  • FIG. 4 shows a front region of a ram boring device according to the invention in a sectional side view in a fourth embodiment.
  • Fig. 1 the front portion of a ram boring machine according to the invention is shown in a sectional side view.
  • Fig. 1 shows a first embodiment.
  • the ram boring device on a housing 1, in which a percussion piston 2 is mounted oscillatingly movable.
  • the percussion piston 2 is placed in the known manner by means of compressed air, which is supplied to the ram boring device at its rear end (not shown) via a compressed air line, in the oscillating motion, wherein they in the drilling operation of the ram boring device in each cycle of their movement on a front striking surface incident.
  • the Rammbohrvoretti shown in Fig. 1 is a working according to the 2-stroke principle ram boring device.
  • the percussion piston 2 strikes in two stages, first on a drill head tip 3, which is designed in the form of a chisel, and then on an inner insert or ring insert 4 in the housing 1.
  • the drill head 3 is in the drill head 5 axially, independently of the housing 1, slidably mounted , One end of the drill bit tip
  • the ring insert 4 comprises the impact surface for the percussion piston 2.
  • the impact surface is formed as a base surface of a conically tapered cavity in the ring insert 4.
  • the housing 1 has a circular inner contour with an inner diameter.
  • the ring insert 4 has a circular outer contour with an outer diameter.
  • the ring insert 4 is slightly larger in outer diameter than the inner diameter of the housing 1, provided that ring insert 4 and housing 1 are in the range of the considered section at the same temperature.
  • the housing 1 may be heated and / or the ring insert 4 may have been cooled.
  • the drill head 5 may correspond to the drill head disclosed in WO 2011/128045 A2 a ram boring device. In this regard, reference is made fully to WO 20 1/128045 A2.
  • FIG. 2 shows an alternative embodiment with a drill head 5 inserted endwise into the housing 1, which has an inner insert or ring insert 4 which has been inserted into the housing 1 for reducing the cross section and forming an impact surface for the percussion piston 2.
  • the ring insert 4 has been shrunk into the end-side portion of the housing 1. Through the ring insert 4, the drill head tip 3 extends to one end. The drill head tip 3 is the end guided and has an impact surface for the percussion piston 2.
  • the embodiment shown in Fig. 2 operates on the one-stroke principle.
  • FIG. 3 shows an alternative embodiment in which a ring insert 4 which is part of a drill head 5 has been inserted into the housing 1 at the end.
  • the annular insert 4 of FIG. 3 is the end section of a shrunken-in front housing or drill head, which has an axially boring head tip 3 mounted so as to be displaceable independently of the housing 1.
  • the embodiment shown in Fig. 3 operates on the two-stroke principle.
  • the ring insert 4 and the drill head tip 3 each have an impact surface for the percussion piston 2, to which the percussion piston 2 impinges successively in a forward movement.
  • WO 2011/128045 A2 to which reference is made in this respect.
  • FIG. 4 shows an alternative embodiment in which a ring insert 4 which is part of a drill head 5 has been inserted into the housing 1 at the end.
  • the annular insert 4 of FIG. 4 is the end section of a shrunken-in front housing or drill head 5, which has an axially boring head tip 3 mounted so as to be displaceable independently of the housing 1.
  • a compression spring is arranged, which is compressed by a loading of the drill head tip 3 by means of the percussion piston 2.
  • the drill head tip 3 has an impact surface for the percussion piston 2.
  • the drill head tip 3 Due to the action of the drill head tip 3 by means of the percussion piston 2, the drill head tip 3 can hit the ring insert 4 after the spring arranged between the drill head tip 3 and the ring insert 4 has been at least partially compressed.
  • the embodiment shown in Fig. 4 operates on the two-stroke principle. First, the percussion piston 2 impinges on the drill head tip 3. Due to the pulse transmitted by the percussion piston 2, the drill head tip 3 strikes the ring insert 4 after sufficient compression of the compression spring.

Abstract

The invention relates to a drilling ram device for drilling into the soil, which comprises at least a housing section for an impact piston, characterized in that an annular insert is arranged in front of the impact piston in the housing such that it transmits at least part of the energy of the impact piston to the housing, and that the annular insert is held by means of a shrinkage connection.

Description

"Rammbohrvorrichtung"  "Ram drilling apparatus"
Die Erfindung betrifft eine Rammbohrvorrichtung gemäß Anspruch 1 sowie ein Verfahren zum Herstellen einer Rammbohrvorrichtung gemäß Anspruch 9. The invention relates to a ram boring device according to claim 1 and to a method for producing a ram boring device according to claim 9.
Rammbohrvorrichtungen sind aus dem Stand der Technik bekannt und werden insbesondere für die Herstellung von horizontalen Erdbohrungen verwendet. Bei Rammbohrvorrichtungen handelt es sich um selbstgetriebene Bohrvorrichtungen. In der Regel weist eine derartige Rammbohrvorrichtung einen Schlagkolben auf, der innerhalb eines Gehäuses oszillierend (hin- und her-) bewegt wird und dabei, je nach gewünschter Bewegungsrichtung der Rammbohrvorrichtung, auf eine vordere oder hintere Schlagfläche des Gehäuses prallt. Die dabei übertragene kinetische Energie des Schlagkolbens sorgt für eine Beschleunigung der Rammbohrvorrichtung innerhalb des Erdreichs. Ramm boring devices are known in the art and are used in particular for the production of horizontal wells. Ramm boring devices are self-propelled boring devices. In general, such Rammbohrvorrichtung has a percussion piston which is oscillated (reciprocating) within a housing and thereby, depending on the desired direction of movement of the ram boring device, bounces on a front or rear impact surface of the housing. The transmitted kinetic energy of the percussion piston ensures an acceleration of the ram boring device within the soil.
Eine derartige Rammbohrvorrichtung ist beispielsweise aus DE 10 2009 038 383 A1 bekannt. Das Gehäuse der aus der DE 10 2009 038 383 A1 bekannten Rammbohrvorrichtung ist aus zwei Teilen gefertigt. In einem Teil, d.h. dem hinteren Teil, oszilliert der Schlagkolben. Der andere Teil, d.h. der vordere Teil, weist den Bohrkopf auf und wird von dem Schlagkolben beaufschlagt. Die beiden Teile werden durch Reibschweißen miteinander verbunden. Üblicherweise ist der hintere Teil ein Rohr aus Baustahl, welches für die Herstellung eines Gehäuseabschnitts einer Rammbohrvorrichtung einen Such a ram boring device is known, for example, from DE 10 2009 038 383 A1. The housing of the ram boring device known from DE 10 2009 038 383 A1 is made of two parts. In one part, i. the rear part, the percussion piston oscillates. The other part, i. the front part, has the drill head and is acted upon by the percussion piston. The two parts are joined together by friction welding. Usually, the rear part is a tube made of structural steel, which for the production of a housing portion of a ram boring a
BESTÄTIGUNGSKOPIE vorbestimmten Innendurchmesser aufweist. Der vordere Teil ist üblicherweise aus dem Vollen gefertigt und besteht aus höherwertigem Stahl, da die Kräfte des Schlagkolbens wirken. Nach dem Reibschweißen muss die Reibschweißnaht aufwendig ausgedreht werden, damit der Kolben ohne ein Hindernis nach vorne bewegt werden kann. Nach dem Ausdrehen der Reibschweißnaht erfolgt zudem das Fertigdrehen der Außenkontur des Gehäuses, damit alle Gewinde und andere Konturen auf einer Achse liegen. CONFIRMATION COPY having predetermined inner diameter. The front part is usually made of solid and is made of high quality steel, since the forces of the percussion piston act. After friction welding, the friction weld must be turned out consuming, so that the piston can be moved forward without an obstacle. After unscrewing the friction weld, the outer contour of the housing is also finished, so that all threads and other contours lie on one axis.
Der Erfindung liegt nun die Aufgabe zugrunde, eine Rammbohrvorrichtung und ein Verfahren zum Herstellen einer Rammbohrvorrichtung dahingehend zu verbessern, dass ein einfacherer Aufbau ermöglicht wird. The invention is based on the object of improving a ram boring device and a method for producing a ram boring device such that a simpler structure is made possible.
Diese Aufgabe wird durch den Gegenstand der nebengeordneten Ansprüche gelöst. Vorteilhafte Ausführungsformen sind in den Unteransprüchen beansprucht und ergeben sich aus der nachfolgenden Beschreibung der Erfindung. This object is achieved by the subject matter of the independent claims. Advantageous embodiments are claimed in the subclaims and will become apparent from the following description of the invention.
Kern der Erfindung ist es, in dem Aufschlagabschnitt des Kolbens im Gehäuse einen Ringeinsatz vorzusehen, der den offenen Querschnitt des Gehäuses im Bereich des mit dem Schlagkolben beaufschlagbaren Endes einer Bohrkopfspitze verkleinert. The essence of the invention is to provide a ring insert in the impact section of the piston in the housing, which reduces the open cross-section of the housing in the region of the end of a Bohrkopfspitze acted upon by the percussion piston.
Es wurde erkannt, dass ein mit dem Schlagkolben beaufschlagter Abschnitt des Gehäuses, der die Aufschlagsfläche für den Schlagkolben aufweisen kann, trotz der hohen mechanischen Beanspruchung nicht aus einem Stück mit dem Gehäuse bestehen muss. Erfindungsgemäß kann die Außen- und Innenkontur des Rammbohrgerätes getrennt von dem eingesetzten bzw. einzusetzenden Ringeinsatz hergestellt werden. Bisherige Überlegungen zielten darauf, dass der gesamte vordere Teil aus einem höherwertigen Material mit einer einstückigen Verbindung zwischen der Außenkontur und der Aufschlagsfläche für den Kolben gefertigt sein muss. Diese eingefahrenen Überlegungen wurden überwunden. Der Ringeinsatz ist im Gehäuse derart angeordnet, dass er zumindest einen Teil der Energie des Schlagkolbens auf das Gehäuse überträgt. Der Ringeinsatz kann selbst eine Aufschlagfläche für den Schlagkolben aufweisen und derartig die mechanische Energie des auf die Aufschlagfläche auftreffenden Schlagkolbens übertragen. Die mechanische Energie kann auch indirekt beispielsweise mittels Bohrkopf oder Bohrspitze, der bzw. die vom Schlagkolben beaufschlagt wird, auf den Ringeinsatz übertragen werden. It has been recognized that a section of the housing which is acted upon by the percussion piston and which may have the striking surface for the percussion piston does not have to be made in one piece with the housing despite the high mechanical stress. According to the invention, the outer and inner contour of the ram boring machine can be produced separately from the ring insert used or to be used. Previous considerations were that the entire front part must be made of a higher quality material with a one-piece connection between the outer contour and the impact surface for the piston. These well-thought-out considerations were overcome. The ring insert is arranged in the housing such that it transmits at least a portion of the energy of the percussion piston to the housing. The ring insert may itself have an impact surface for the percussion piston and in this way transmit the mechanical energy of the percussion piston impinging on the impact surface. The mechanical energy can also be transmitted indirectly, for example by means of a drill head or drill bit, which is acted upon by the percussion piston, on the ring insert.
Dadurch lässt sich das bekannte Reibschweißen erfindungsgemäß vermeiden. Das bietet mehrere Vorteile. Das Gehäuse kann beispielsweise aus einem Rohr gefertigt werden. Ein aufwendiges und teures Ausdrehen einer Reibschweißnaht ist nicht mehr erforderlich. Ein bisher an Drittunternehmen beauftragtes Reibschweißen kann entfallen. Die Herstellungszeit wird verringert. Die sonst erforderlichen mechanischen Bear- beitungen - z.B. Honen nach dem sonst üblichen Reibschweißen - sind nicht mehr notwendig. As a result, the known friction welding can be avoided according to the invention. This offers several advantages. The housing can be made for example of a tube. A costly and expensive turning out a friction weld is no longer necessary. A previously contracted to third party friction welding can be omitted. The production time is reduced. The otherwise required mechanical machining Treatments - eg honing after the usual friction welding - are no longer necessary.
Der Ringeinsatz kann im Bereich der Aufschlagsfläche für den Schlagkolben angeordnet sein. Der Ringeinsatz kann ferner die Aufschlagsfläche für den Schlagkolben des Rammbohrgeräts aufweisen. Der entsprechende Gehäuseabschnitt muss dann nach Einbringen des Ringeinsatzes nicht mehr mechanisch bearbeitet werden. Der Ringeinsatz kann auch starr oder beweglich mit der Bohrkopfspitze verbunden sein, wobei auch die Bohrkopfspitze die Aufschlagsfläche für den Schlagkolben aufweisen kann, die ihrerseits die mechanische Energie des Schlagkolbens auf den Ringeinsatz und damit auf das Gehäuse überträgt. The ring insert can be arranged in the region of the impact surface for the percussion piston. The ring insert may further comprise the impact surface for the percussion piston of the ram boring machine. The corresponding housing section then no longer has to be machined mechanically after inserting the ring insert. The ring insert may also be rigidly or movably connected to the drill head tip, wherein the drill head tip may have the impact surface for the percussion piston, which in turn transmits the mechanical energy of the percussion piston on the ring insert and thus on the housing.
Unter„Rammbohrvorrichtung" wird insbesondere jedes Gerät verstanden, welches in einem bestehenden oder zu erstellenden Kanal stoßweise bewegt wird, um eine Bohrung zu erstellen oder aufzuweiten oder ein bestehendes Rohr zerstörend oder nicht zerstörend zu ersetzen oder zu reinigen, Leitungen in bestehende Rohre oder andere Langkörper einzuziehen sowie sämtliche Vorrichtungen für Bauarbeiten des unterirdischen Vortriebs. Eine erfindungsgemäße Rammbohrvorrichtung kann insbesondere ein selbstgetriebenes Schlaggerät zur Erstellung einer Horizontalbohrung sein. By "ram boring device" is meant, in particular, any device which is intermittently moved in an existing or to-be-created channel to create or expand a bore or destructively or non-destructively replace or clean an existing pipe, conduits into existing pipes or other long bodies A ram boring device according to the invention may in particular be a self-propelled percussion device for producing a horizontal bore.
Der Begriff „Rammbohrvorrichtung" umfasst sowohl Erdverdrängungsvorrichtungen, bei denen die Bohrkopfspitze fest mit dem Gehäuse verbunden ist als auch Rammbohrvorrichtungen mit axial, unabhängig vom Gehäuse verschiebbar gelagerter Bohrkopfspitze. Bei der Bohrkopfspitze kann es sich insbesondere um einen Meißel handeln. Eine erfindungsgemäße Rammbohrvorrichtung kann sowohl eine Ein-Takt-Vor- richtung als auch eine Zwei-Takt-Vorrichtung sein. Bei einer Zwei-Takt-Vorrichtung schlägt zunächst der Schlagkolben auf die Bohrkopfspitze, die im ersten Takt vorauseilt. Das Gehäuse wird im zweiten Takt vom Schlagkolben beaufschlagt. Spitzenwiderstand und Mantelreibung werden bei einer Zwei-Takt-Vorrichtung getrennt und abwechselnd leichter überwunden. Bei einer Zwei-Takt-Vorrichtung erfolgt eine bessere Energieumsetzung, die insbesondere die Zertrümmerung von Hindernissen infolge der Konzentration des Schlagimpulses auf die Bohrkopfspitze erleichtert. Infolge der entsprechend dem Hubweg des Bohrkopfes vorauseilenden Bodenverdrängung bleibt das Gehäuse in ruhiger Lage und gewährleistet dadurch eine relativ gute Laufstabilität. The term "ram boring device" includes both earth displacement devices in which the drill head tip is fixedly connected to the housing and ram boring devices with axial drill head tip displaceably mounted independently of the housing In a two-stroke device, first of all the percussion piston strikes the drill head point leading in the first cycle In a two-cycle device, a better energy conversion takes place, which in particular facilitates the destruction of obstacles due to the concentration of the impact pulse on the drill bit tip ubweg of the drill head vorseilenden soil displacement, the housing remains in a quiet location, thereby ensuring a relatively good running stability.
Die Rammbohrvorrichtung im Sinne der Erfindung ist nicht auf unterirdische Erdarbeiten beschränkt. So können beispielsweise Leitungen, in denen ein Erdbohrgerät betrieben wird, auch oberirdisch verlaufen. Der Begriff„Horizontalbohrung" im Sinne der vorliegenden Erfindung erfasst insbesondere jede Art von bestehenden oder zu erstellenden, vorzugsweise horizontalen Kanälen in einem Körper, insbesondere Erdkanäle einschließlich Erdbohrungen, Felsbohrungen oder Erdleitungen sowie unterirdische oder oberirdische Rohrleitungen und Abwasserkanäle, die sich durch Einsatz einer entsprechenden Rammbohrvorrichtung herstellen, aufweiten, zerstören, aufschneiden oder reinigen lassen. The ram boring device according to the invention is not limited to underground earthworks. Thus, for example, lines in which a Erdbohrgerät is operated, run above ground. The term "horizontal drilling" in the context of the present invention covers in particular any type of existing or to be created, preferably horizontal channels in a body, in particular earth channels including earth boreholes, rock holes or ground lines and underground or above-ground pipelines and sewers, which are characterized by use of a corresponding Rammbohrvorrichtung make, widen, destroy, cut or clean.
Der Begriff „Ringeinsatz" ist nicht auf eine klassische Ringform beschränkt. Er kann also auch eine andere Form als die Kreisform aufweisen oder unterbrochen sein. Insbesondere kann der Ringeinsatz eine äußere Konturform aufweisen, die im Wesentlichen der Innenkonturform des Abschnitts entspricht, in den der Ringeinsatz eingesetzt ist. Es kann vorgesehen sein, dass die äußere Konturform des Ringeinsatzes eine Einhüllende aufweist, die im Wesentlichen der Innenkonturform des Abschnitts entspricht, in dem der Ringeinsatz eingesetzt ist. Insbesondere kann der Ringeinsatz eine, vorzugsweise mittig angeordnete, Öffnung aufweisen. The term "ring insert" is not limited to a classic ring shape, so it can also have a different shape than the circular shape or be interrupted.in particular, the ring insert may have an outer contour shape, which corresponds substantially to the inner contour shape of the section in which the ring insert It can be provided that the outer contour shape of the ring insert has an envelope which essentially corresponds to the inner contour shape of the section in which the ring insert is inserted.
Der Ringeinsatz ist im Abschnitt mittels einer Schrumpf-Verbindung gehalten. Hierdurch wird eine sehr einfache und kostengünstige Möglichkeit geschaffen, den Ringeinsatz in dem Abschnitt zu fixieren bzw. mit diesem zu verbinden. Bei dieser Ausführungsform der Erfindung weist der Ringeinsatz eine Außenkontur auf, die eine größere Abmessung umfasst als eine entsprechende Abmessung der Innenkontur des Gehäuseabschnitts ohne im Gehäuseabschnitt angeordneten Ringeinsatz. Der Ringeinsatz kann in den Gehäuseabschnitt eingeführt werden, indem ein Temperaturunterschied zwischen Ringeinsatz und Gehäuseabschnitt erzeugt wird, wodurch der Innendurchmesser temporär vergrößert und/oder die Außenkontur temporär verkleinert wird. Dies kann beispielsweise mittels von außen aufgebrachter Wärme oder von Innen eingeführter Kälte erfolgen. Der Begriff „Schrumpf-Verbindung" umfasst jegliche Art von Verbindung, bei der eine Möglichkeit geschaffen wird, den geringfügig größeren Ringeinsatz in dem Innendurchmesser des Gehäuseabschnitts anzuordnen. Eine Schrumpf-Verbindung entsteht infolge eines Übermaßes der ineinander gesetzten Teile. The ring insert is held in the section by means of a shrink connection. This creates a very simple and cost-effective way to fix the ring insert in the section or to connect with this. In this embodiment of the invention, the ring insert on an outer contour, which has a larger dimension than a corresponding dimension of the inner contour of the housing portion without arranged in the housing portion ring insert. The ring insert can be inserted into the housing section by creating a temperature difference between the ring insert and the housing section, whereby the inner diameter is temporarily increased and / or the outer contour is temporarily reduced. This can be done, for example, by externally applied heat or cold introduced from the inside. The term "shrink connection" encompasses any type of connection that provides a means of placing the slightly larger ring insert in the inner diameter of the housing section A shrink connection occurs due to an oversize of the nested parts.
Vorteilhafterweise weist der Abschnitt, in dem der Ringeinsatz gehalten wird, einen kreisförmigen Durchmesser auf. Hierdurch kann die Herstellung vereinfacht werden, da der Ringeinsatz zum Abschnitt rotationsinvariant eingesetzt werden kann. Es kann auf eine Vorzugslage beim Einbringen des Ringeinsatzes verzichtet werden. Advantageously, the portion in which the ring insert is held has a circular diameter. As a result, the production can be simplified, since the ring insert can be used to the section rotationally invariant. It can be dispensed with a preferred situation when introducing the ring insert.
Der Ringeinsatz kann auch als Teil des Bohrkopfs ausgebildet sein oder separat von diesem vorliegen. Der Ringeinsatz kann endseitig am Bohrkopf angeordnet sein. Insbesondere kann der Ringeinsatz endseitig im Gehäuseabschnitt des Bohrkopfs bzw. der Bohrkopfspitze angeordnet sein. Der endseitig in dem Gehäuseabschnitt angeord- nete Ringeinsatz kann vor dem Gehäuseabschnitt für den Schlagkolben eingesetzt sein. The ring insert may also be formed as part of the drill head or be present separately from this. The ring insert can be arranged on the end side of the drill head. In particular, the ring insert can be arranged at the end in the housing section of the drill head or the drill head tip. The end arranged in the housing section Nete ring insert can be used in front of the housing section for the percussion piston.
In einer bevorzugten Ausführungsform weist der Ringeinsatz ein anderes Material als das Gehäuse auf. Hierdurch kann die Möglichkeit geschaffen werden, den einzelnen Anforderungen des Ringeinsatzes, welcher eine Aufschlagfläche für den Schlagkolben aufweisen kann, und des Gehäuses Rechnung zu tragen. Der Begriff„aufweisen" um- fasst im Sinne der Erfindung, dass ein Material bzw. eine Komponente vorhanden ist (den reinen Wortsinn des Begriffes), aber auch, dass das in Bezug genommene Element aus dem Material besteht, wobei allfällige Verunreinigungen oder Restbestandteile vorhanden sein können. In a preferred embodiment, the ring insert has a different material than the housing. In this way, the possibility can be created to take into account the individual requirements of the ring insert, which may have an impact surface for the percussion piston, and the housing. The term "comprising" in the context of the invention encompasses the fact that a material or a component is present (the pure sense of the term), but also that the element referred to consists of the material, any impurities or residual constituents being present could be.
In einer bevorzugten Ausführungsform weist die Rammbohrvorrichtung einen Ringeinsatz auf, der ein Material umfasst, welches wärmebehandelt ist. Mittels der Wärmebehandlung können beispielsweise unterschiedliche Eigenschaften eingestellt werden, je nachdem, welche Wärmebehandlung des Materials durchgeführt wurde. Unterschiedliche Wärmebehandlungen können zu unterschiedlichen Eigenschaften führen. Die Wärmebehandlung kann derart sein, dass eine durchgreifende Gefügeumwandlung (Glühen oder Härten) und/oder lediglich eine Umwandlung an der Oberfläche eines Werkstücks (Diffusions- oder Beschichtungsverfahren) bewirkt wird. Die unterschiedlichen Wärmebehandlungen können beispielsweise mittels eines Schliffbildes nachgewiesen werden. In a preferred embodiment, the ram boring apparatus comprises a ring insert comprising a material which is heat treated. By way of example, different properties can be set by means of the heat treatment, depending on which heat treatment of the material has been carried out. Different heat treatments can lead to different properties. The heat treatment may be such as to cause a sweeping microstructural transformation (annealing or hardening) and / or only a transformation on the surface of a workpiece (diffusion or coating process). The different heat treatments can be detected for example by means of a micrograph.
Die vorstehenden Ausführungen stellen ebenso wie die nachfolgende Beschreibung beispielhafter Ausführungsformen keinen Verzicht auf bestimmte Ausführungsformen oder Merkmale dar. The above statements as well as the following description of exemplary embodiments do not represent a waiver of certain embodiments or features.
Die Erfindung wird nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert. In den Zeichnungen zeigt: The invention will be explained in more detail with reference to an embodiment shown in the drawings. In the drawings shows:
Fig. 1 einen vorderen Bereich einer erfindungsgemäßen Rammbohrvorrichtung in einer geschnittenen Seitenansicht in einer ersten Ausführungsform; 1 shows a front region of a ram boring device according to the invention in a sectional side view in a first embodiment.
Fig. 2 einen vorderen Bereich einer erfindungsgemäßen Rammbohrvorrichtung in einer geschnittenen Seitenansicht in einer zweiten Ausführungsform; FIG. 2 shows a front region of a ram boring device according to the invention in a sectional side view in a second embodiment; FIG.
Fig. 3 einen vorderen Bereich einer erfindungsgemäßen Rammbohrvorrichtung in einer geschnittenen Seitenansicht in einer dritten Ausführungsform; und 3 shows a front region of a ram boring device according to the invention in a sectional side view in a third embodiment; and
Fig. 4 einen vorderen Bereich einer erfindungsgemäßen Rammbohrvorrichtung in einer geschnittenen Seitenansicht in einer vierten Ausführungsform. In Fig. 1 ist der vordere Bereich eines erfindungsgemäßen Rammbohrgeräts in einer geschnittenen Seitenansicht dargestellt. Die Fig. 1 zeigt eine erste Ausführungsform. In diesem Abschnitt weist das Rammbohrgerät ein Gehäuse 1 auf, in dem ein Schlagkolben 2 oszillierend beweglich gelagert ist. Der Schlagkolben 2 wird auf bekannte Art und Weise mittels Druckluft, die der Rammbohrvorrichtung an ihrem rückseitigen Ende (nicht dargestellt) über eine Druckluftleitung zugeführt wird, in die oszillierende Bewegung versetzt, wobei sie im Bohrbetrieb der Rammbohrvorrichtung in jedem Zyklus ihrer Bewegung auf eine vordere Schlagfläche auftrifft. 4 shows a front region of a ram boring device according to the invention in a sectional side view in a fourth embodiment. In Fig. 1, the front portion of a ram boring machine according to the invention is shown in a sectional side view. Fig. 1 shows a first embodiment. In this section, the ram boring device on a housing 1, in which a percussion piston 2 is mounted oscillatingly movable. The percussion piston 2 is placed in the known manner by means of compressed air, which is supplied to the ram boring device at its rear end (not shown) via a compressed air line, in the oscillating motion, wherein they in the drilling operation of the ram boring device in each cycle of their movement on a front striking surface incident.
Die in Fig. 1 gezeigte Rammbohrvorrichtung ist eine nach dem 2-Takt-Prinzip arbeitende Rammbohrvorrichtung. Der Schlagkolben 2 trifft in zwei Stufen zunächst auf eine Bohrkopfspitze 3, die in Form eines Meißels ausgestaltet ist, und dann auf einen Inneneinsatz bzw. Ringeinsatz 4 im Gehäuse 1. Die Bohrkopfspitze 3 ist im Bohrkopf 5 axial, unabhängig vom Gehäuse 1 , verschiebbar gelagert. Ein Ende der BohrkopfspitzeThe Rammbohrvorrichtung shown in Fig. 1 is a working according to the 2-stroke principle ram boring device. The percussion piston 2 strikes in two stages, first on a drill head tip 3, which is designed in the form of a chisel, and then on an inner insert or ring insert 4 in the housing 1. The drill head 3 is in the drill head 5 axially, independently of the housing 1, slidably mounted , One end of the drill bit tip
3 erstreckt sich durch einen verkleinerten Querschnitt im Inneren eines Abschnitts des Gehäuses 1 , welcher durch den Ringeinsatz 4 ausgebildet wird. Der Ringeinsatz 4 umfasst die Aufschlagsfläche für den Schlagkolben 2. Die Aufschlagsfläche ist als Basisfläche eines sich konisch verjüngenden Hohlraums im Ringeinsatz 4 ausgebildet. 3 extends through a reduced cross section in the interior of a portion of the housing 1, which is formed by the ring insert 4. The ring insert 4 comprises the impact surface for the percussion piston 2. The impact surface is formed as a base surface of a conically tapered cavity in the ring insert 4.
Das Gehäuse 1 weist im Abschnitt mit dem Ringeinsatz 4 eine kreisförmige Innenkontur mit einem Innendurchmesser auf. Der Ringeinsatz 4 weist eine kreisförmige Außenkontur mit einem Außendurchmesser auf. Der Ringeinsatz 4 ist im Außendurchmesser etwas größer als der Innendurchmesser des Gehäuses 1 , sofern sich Ringeinsatz 4 und Gehäuse 1 im Bereich des betrachteten Abschnitts auf gleicher Temperatur befinden. Um den Ringeinsatz 4 in das Gehäuse 1 einzubringen, kann das Gehäuse 1 erwärmt und/oder der Ringeinsatz 4 gekühlt worden sein. Der RingeinsatzIn the section with the ring insert 4, the housing 1 has a circular inner contour with an inner diameter. The ring insert 4 has a circular outer contour with an outer diameter. The ring insert 4 is slightly larger in outer diameter than the inner diameter of the housing 1, provided that ring insert 4 and housing 1 are in the range of the considered section at the same temperature. In order to introduce the ring insert 4 into the housing 1, the housing 1 may be heated and / or the ring insert 4 may have been cooled. The ring insert
4 kann so auf die gewünschte Position im Gehäuse 1 gebracht werden. Nach Abkühlen bzw. Erwärmen des Gehäuses 1 bzw. des Ringeinsatzes 4 auf gleiche Temperatur ist der Ringeinsatz 4 in der Position zum Gehäuse 1 fixiert. 4 can be brought to the desired position in the housing 1. After cooling or heating of the housing 1 and the ring insert 4 at the same temperature of the ring insert 4 is fixed in position to the housing 1.
Der Bohrkopf 5 kann dem in WO 2011/128045 A2 offenbarten Bohrkopf einer Rammbohrvorrichtung entsprechen. Diesbezüglich wird auf die WO 20 1/128045 A2 vollumfänglich Bezug genommen. The drill head 5 may correspond to the drill head disclosed in WO 2011/128045 A2 a ram boring device. In this regard, reference is made fully to WO 20 1/128045 A2.
Die Fig. 2 zeigt eine alternative Ausführungsform mit einem endseitig in das Gehäuse 1 eingesetzten Bohrkopf 5, der einen Inneneinsatz bzw. Ringeinsatz 4 aufweist, der in das Gehäuse 1 zur Verkleinerung des Querschnitts und Ausbildung einer Aufschlagsfläche für den Schlagkolben 2 eingesetzt wurde. Der Ringeinsatz 4 ist in den endseiti- gen Abschnitt des Gehäuses 1 eingeschrumpft worden. Durch den Ringeinsatz 4 erstreckt sich die Bohrkopfspitze 3 mit einem Ende. Die Bohrkopfspitze 3 wird endseitig geführt und weist eine Aufschlagsfläche für den Schlagkolben 2 auf. Die in Fig. 2 dargestellte Ausführungsform arbeitet nach dem Ein-Takt-Prinzip. FIG. 2 shows an alternative embodiment with a drill head 5 inserted endwise into the housing 1, which has an inner insert or ring insert 4 which has been inserted into the housing 1 for reducing the cross section and forming an impact surface for the percussion piston 2. The ring insert 4 has been shrunk into the end-side portion of the housing 1. Through the ring insert 4, the drill head tip 3 extends to one end. The drill head tip 3 is the end guided and has an impact surface for the percussion piston 2. The embodiment shown in Fig. 2 operates on the one-stroke principle.
Die Fig. 3 zeigt eine alternative Ausführungsform, bei dem endseitig in das Gehäuse 1 ein Ringeinsatz 4 eingesetzt wurde, der Teil eines Bohrkopfes 5 ist. Bei dem Ringeinsatz 4 der Fig. 3 handelt es sich um den Endabschnitt eines eingeschrumpften Vordergehäuses bzw. Bohrkopfes, das eine axial, unabhängig vom Gehäuse 1 verschiebbar gelagerte Bohrkopfspitze 3 aufweist. Die in Fig. 3 dargestellte Ausführungsform arbeitet nach dem Zwei-Takt-Prinzip. Der Ringeinsatz 4 und die Bohrkopfspitze 3 weisen jeweils eine Aufschlagsfläche für den Schlagkolben 2 auf, auf die der Schlagkolben 2 zeitlich nacheinander bei einer Bewegung nach vorne auftrifft. Hinsichtlich des Aufbaus des Bohrkopfes 5, der in Fig. 3 dargestellten Ausführungsform, wird auf die WO 2011/128045 A2 verwiesen, auf die diesbezüglich vollumfänglich Bezug genommen wird. FIG. 3 shows an alternative embodiment in which a ring insert 4 which is part of a drill head 5 has been inserted into the housing 1 at the end. The annular insert 4 of FIG. 3 is the end section of a shrunken-in front housing or drill head, which has an axially boring head tip 3 mounted so as to be displaceable independently of the housing 1. The embodiment shown in Fig. 3 operates on the two-stroke principle. The ring insert 4 and the drill head tip 3 each have an impact surface for the percussion piston 2, to which the percussion piston 2 impinges successively in a forward movement. With regard to the structure of the drill head 5, the embodiment shown in Fig. 3, reference is made to WO 2011/128045 A2, to which reference is made in this respect.
Die Fig. 4 zeigt eine alternative Ausführungsform, bei dem endseitig in das Gehäuse 1 ein Ringeinsatz 4 eingesetzt wurde, der Teil eines Bohrkopfes 5 ist. Bei dem Ringeinsatz 4 der Fig. 4 handelt es sich um den Endabschnitt eines eingeschrumpften Vordergehäuses bzw. Bohrkopfes 5, das eine axial, unabhängig vom Gehäuse 1 verschiebbar gelagerte Bohrkopfspitze 3 aufweist. Zwischen der Bohrkopfspitze 3 und dem Ringeinsatz 4 ist eine Druckfeder angeordnet, die bei einer Beaufschlagung der Bohrkopfspitze 3 mittels des Schlagkolbens 2 zusammengedrückt wird. Die Bohrkopfspitze 3 weist eine Aufschlagsfläche für den Schlagkolben 2 auf. Aufgrund der Beaufschlagung der Bohrkopfspitze 3 mittels des Schlagkolbens 2 kann die Bohrkopfspitze 3 auf den Ringeinsatz 4 treffen, nachdem die zwischen der Bohrkopfspitze 3 und dem Ringeinsatz 4 angeordnete Feder zumindest teilweise zusammengedrückt wurde. Die in Fig. 4 dargestellte Ausführungsform arbeitet nach dem Zwei-Takt-Prinzip. Zunächst trifft der Schlagkolben 2 auf die Bohrkopfspitze 3 auf. Durch den von dem Schlagkolben 2 übertragenen Impuls trifft die Bohrkopfspitze 3 auf den Ringeinsatz 4 auf nach ausreichender Kompression der Druckfeder. FIG. 4 shows an alternative embodiment in which a ring insert 4 which is part of a drill head 5 has been inserted into the housing 1 at the end. The annular insert 4 of FIG. 4 is the end section of a shrunken-in front housing or drill head 5, which has an axially boring head tip 3 mounted so as to be displaceable independently of the housing 1. Between the drill head tip 3 and the ring insert 4, a compression spring is arranged, which is compressed by a loading of the drill head tip 3 by means of the percussion piston 2. The drill head tip 3 has an impact surface for the percussion piston 2. Due to the action of the drill head tip 3 by means of the percussion piston 2, the drill head tip 3 can hit the ring insert 4 after the spring arranged between the drill head tip 3 and the ring insert 4 has been at least partially compressed. The embodiment shown in Fig. 4 operates on the two-stroke principle. First, the percussion piston 2 impinges on the drill head tip 3. Due to the pulse transmitted by the percussion piston 2, the drill head tip 3 strikes the ring insert 4 after sufficient compression of the compression spring.

Claims

Patentansprüche: claims:
1. Rammbohrvorrichtung zum Bohren im Erdreich, die mindestens einen Gehäuseabschnitt für einen Schlagkolben (2) aufweist, wobei vor dem Schlagkolben (2) ein Ringeinsatz (4) im Gehäuse (1) so angeordnet ist, dass er zumindest einen Teil der Energie des Schlagkolbens (2) auf das Gehäuse überträgt, dadurch gekennzeichnet, dass der Ringeinsatz (4) mittels einer Schrumpf-Verbindung gehalten ist. 1. Rammbohrvorrichtung for drilling in the ground, which has at least one housing portion for a percussion piston (2), wherein before the percussion piston (2) a ring insert (4) in the housing (1) is arranged so that it at least a portion of the energy of the percussion piston (2) transmits to the housing, characterized in that the ring insert (4) is held by means of a shrink connection.
2. Rammbohrvorrichtung nach Anspruch 1 , wobei der Abschnitt, in dem der Ringeinsatz (4) eingesetzt ist, derart ausgestaltet ist, dass die Innenkontur des Abschnitts bei gleicher Temperatur wie die des Ringeinsatzes (4) ohne im Abschnitt angeordneten Ringeinsatz (4) kleiner ist als die Außenkontur des Ringeinsatzes (4). 2. Rammbohrvorrichtung according to claim 1, wherein the portion in which the ring insert (4) is inserted, is designed such that the inner contour of the section at the same temperature as that of the ring insert (4) without arranged in the section ring insert (4) is smaller as the outer contour of the ring insert (4).
3. Rammbohrvorrichtung nach einem der Ansprüche 1 bis 2, wobei der Abschnitt, in dem der Ringeinsatz (4) angeordnet ist, einen kreisförmigen Durchmesser aufweist. 3. ram boring apparatus according to any one of claims 1 to 2, wherein the portion in which the ring insert (4) is arranged, has a circular diameter.
4. Rammbohrvorrichtung nach einem der Ansprüche 1 bis 3, wobei der Ringeinsatz (4) eine Durchgangsöffnung für eine Bohrkopfspitze (3) und eine Basisfläche eines konisch zulaufenden Hohlraums aufweist. 4. ram boring apparatus according to any one of claims 1 to 3, wherein the ring insert (4) has a through hole for a drill head tip (3) and a base surface of a tapered cavity.
5. Rammbohrvorrichtung nach einem der Ansprüche 1 bis 4, wobei der Ringeinsatz (4) ringförmig ist. 5. ram boring apparatus according to any one of claims 1 to 4, wherein the ring insert (4) is annular.
6. Rammbohrvorrichtung nach einem der Ansprüche 1 bis 5, wobei der Ringeinsatz (4) als endseitig in einem Gehäuseabschnitt für eine Bohrkopfspitze (3) angeordnet und vor dem Gehäuseabschnitt für den Schlagkolben (2) eingesetzt ist. 6. Rammbohrvorrichtung according to one of claims 1 to 5, wherein the ring insert (4) arranged as an end in a housing portion for a drill head tip (3) and in front of the housing portion for the percussion piston (2) is inserted.
7. Rammbohrvorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Ringeinsatz (4) ein anderes Material aufweist als das Gehäuse (1 ). 7. Rammbohrvorrichtung according to one of claims 1 to 6, characterized in that the ring insert (4) has a different material than the housing (1).
8. Rammbohrvorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Material des Ringeinsatzes (4) wärmebehandelt ist. 8. ram boring device according to one of claims 1 to 7, characterized in that the material of the ring insert (4) is heat treated.
9. Verfahren zum Herstellen einer Rammbohrvorrichtung zum Bohren im Erdreich, wobei in einem Gehäuseabschnitt vor einem Abschnitt für einen Schlagkolben ein Ringeinsatz (4) so eingesetzt wird, dass er zumindest einen Teil der Energie des Schlagkolbens (2) auf das Gehäuse überträgt, dadurch gekennzeichnet, dass zwischen Ringeinsatz (4) und dem Abschnitt eine Schrumpf-Verbindung hergestellt wird. 9. A method for producing a ram boring device for drilling in the ground, wherein in a housing portion in front of a section for a percussion piston a ring insert (4) is inserted so that it transmits at least a portion of the energy of the percussion piston (2) on the housing, characterized . that between the ring insert (4) and the section a shrink connection is made.
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WO2016070987A1 (en) 2016-05-12
US10828763B2 (en) 2020-11-10
PL3215704T3 (en) 2019-02-28
AU2015342237B2 (en) 2018-08-23
DE102014016154A1 (en) 2016-05-04
AU2015342237A1 (en) 2017-06-01
US20170334052A1 (en) 2017-11-23
EP3215704B1 (en) 2018-10-31

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