EP3317486B1 - Percussion drilling device - Google Patents
Percussion drilling device Download PDFInfo
- Publication number
- EP3317486B1 EP3317486B1 EP16735992.6A EP16735992A EP3317486B1 EP 3317486 B1 EP3317486 B1 EP 3317486B1 EP 16735992 A EP16735992 A EP 16735992A EP 3317486 B1 EP3317486 B1 EP 3317486B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control sleeve
- drilling device
- guide tube
- percussion
- percussion drilling
- 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.)
- Active
Links
- 238000009527 percussion Methods 0.000 title claims description 45
- 238000005553 drilling Methods 0.000 title claims description 14
- 239000012530 fluid Substances 0.000 claims description 4
- 125000004122 cyclic group Chemical group 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims 2
- 239000002689 soil Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B1/00—Percussion drilling
- E21B1/38—Hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member
Definitions
- the invention relates to a ram boring device.
- Ramming devices as used in particular for the production of horizontal Erdbohrvorraumen are usually driven by a percussion piston, which is reciprocated within the housing and thereby, depending on the desired direction of movement of the device, bounces on a front or rear impact surface.
- the transmitted thereby kinetic energy of the percussion piston ensures an acceleration of the ram boring device within the soil.
- a reversal of the direction of movement is achieved in that the middle position (between the two turning points) of the percussion piston from a front to a rear position - or vice versa - is moved.
- the percussion piston strikes either the front or rear striking surface and thereby defines the direction of movement of the device.
- a housing-fixed guide tube and an axially displaceable on the guide tube control sleeve is used, on which the percussion piston is axially displaceable.
- the percussion piston when the percussion piston is axially displaceable on the control sleeve and the control sleeve has a large length, it can occur that the percussion piston acts on the movement of the control sleeve and, for example, the control sleeve twisted, whereby the life of Control sleeve can be reduced, which requires increased repair and / or maintenance costs.
- the performance of a ram boring device can be greatly reduced by increased friction.
- the housing of the ram boring device bends by lateral forces in the ground. It can then come to the angular offset between the control sleeve and percussion piston, causing the percussion piston and thus the entire ram boring device come to a standstill.
- the object of the invention is therefore to provide an improved Rammbohrvorraum, which may have improved performance, a longer service life, a lower tendency to stall and / or increased life.
- control sleeve has at least two sections, in particular in the longitudinal direction, which are connected to each other by means of a movable connection, which may be designed as an elastic connecting portion and / or as a joint.
- a movable connection which may be designed as an elastic connecting portion and / or as a joint.
- the movable connection may have a function corresponding to a movable bearing for one of the two sections of the control sleeve.
- the section can not be in contact with the guide tube at a distance from the movable connection.
- the movable connection may form a sliding bearing for one of the two sections and a movable bearing for the other of the two sections.
- the movable connection may be mounted on the guide tube to perform the axial displacement of the guide tube, and also to allow pivoting of a portion to the guide tube.
- the invention provides a ram boring device with a percussion piston mounted within a housing and driven in a cyclical reciprocating motion.
- the percussion piston strikes a front striking surface in a first switching position in order to drive the ram boring device in a first direction of movement.
- In a second switching position hits the percussion piston on a rear striking surface to drive the ram boring device in a second direction of movement.
- the ram boring device has a housing-fixed guide tube and an axially displaceable on the guide tube control sleeve.
- the percussion piston is axially displaceable on the control sleeve.
- the control sleeve has two sections connected to one another by means of a movable connection.
- connection of the two sections of the control sleeve by means of the movable connection can be made directly or indirectly via the connection. It can be provided that, for example, further sections can be provided between an elastic connection section and / or a joint as a movable connection and the two sections. Furthermore, the control sleeve is not limited to the presence of the two sections with a connecting portion and / or a joint. In addition to the two sections and the connecting section and / or the joint, further sections of the control sleeve can be provided.
- a “Rammbohrvoroplasty” according to the invention comprises a self-propelled impact device, which works soil displacing, and can bring a pipe or a pipe beating in the soil.
- soil in the context of the present invention includes in particular any type of existing or to be created, preferably horizontal channels in a body, in particular earth channels including earth bores, rock holes or ground lines and underground or above-ground pipelines and water channels, by using a corresponding Rammbohrvortechnisch make or feed.
- connecting portion and “joint” include the formation of a movable or articulated connection of the two portions of the control sleeve, which allows relative movement of the two sections to each other, in particular a three-axis, biaxial or uniaxial movement, in particular a pivoting movement of the two Sections relative to each other is possible.
- connection is formed by means of a connecting portion and / or joint between a head portion and a main body portion of the control sleeve.
- the main body portion of the control sleeve may at least partially rest against the guide tube.
- the head portion of the control sleeve is at least end, i. spaced from the movable connection, spaced from the guide tube and formed at the end portion of the head portion of the control sleeve is not supported on the guide tube, but percussion piston and head portion of the control sleeve form guide surfaces relative to each other, along which the percussion piston is axially displaceable relative to the control sleeve.
- the two sections of the control sleeve have different outer diameters and in particular different inner diameters.
- the inner diameter of the one portion, in particular of the main body portion is correspondingly adapted to the outer diameter of the guide tube so as to be axially displaceable relative thereto.
- the outside diameter of the Guide tube substantially corresponds to the inner diameter of the first portion, in particular of the main body portion.
- the outer diameter of the first portion, in particular of the main body portion is designed such that a contact with the percussion piston is not possible.
- the first section, in particular the main body section has guide surfaces for the relative guidance of the first section to the guide tube.
- the inner diameter of the second section in particular of the head section, is configured in such a way that there is no contact in the end region of the second section with the guide sleeve.
- the outer diameter of the second portion, in particular of the head portion is adapted to an inner diameter of the percussion piston to form guide surfaces for the relative axial displaceability of the percussion piston to the control sleeve.
- the two sections can be connected to each other directly or indirectly by means of the movable connection, comprising the elastic connection section and / or the hinge.
- the two sections of the control sleeve on the guide tube are pivotable relative to each other.
- the section facing the percussion piston can be pivoted against the other of the two sections.
- the one of the sections, which is pivotable against the other can also be pivotable relative to the guide tube, provided that the other of the two sections is mounted axially displaceably on the guide tube.
- the elastic connecting portion and / or a portion of the joint is at least partially against the guide tube and is axially displaceable together with the control sleeve relative to the guide tube to form a bearing for one of the sections, by means of which one of the sections can receive an additional degree of freedom of movement to the guide tube.
- the elastic connecting portion and / or the joint has a ring shape with an L-shaped cross section, so that a pivoting of one of the two sections is simplified due to the geometric design.
- the elastic connecting portion comprises an elastically deformable plastic, which may in particular be dimensionally stable.
- the elastic connecting portion may comprise an elastomer or an elastomeric material or an elastic polymer, for example rubber.
- the elastic connecting portion may also - alternatively or additionally - comprise a polyurethane.
- the term “comprising” covers the meaning contents of the terms “exhibit” and “consist of”, so that in one case, in addition to the one mentioned material or chemical compound further materials or chemical compounds may be present and in the other case, the pure material is present except for unavoidable impurities.
- the guide tube has a stop
- the control sleeve has a correspondingly configured counter element, which rests in one of the switching positions on the stop of the guide tube.
- the counter-element may be formed on or connected to the portion which is pivotable relative to the guide tube. In this way it can be made possible that the control sleeve can be brought into a switching position defined by the stop and the counter element.
- annular space is formed between the guide tube and a ring element, which is arranged in particular stationary relative to the guide tube.
- the annular space is at least partially covered by the end face of the control sleeve and is connected to a pressurizable with a fluid control line.
- the control line By means of the control line, the annular space can be pressurized to extend the control sleeve from the annulus.
- the fluid may be either a compressed gas, in particular compressed air, or a liquid, so that the switching pneumatically or hydraulically from the switching position before the extension of the control sleeve from the annulus into the switching position can be done with extended from the annulus control sleeve.
- a vent hole is formed at the front of the two sections of the control sleeve, in particular at the head portion, adjacent to the movable connection, with which a pressure equalization is achieved.
- the vent hole may be formed in the front of the two sections and / or in the movable connection.
- the pressure equalization can take place between the outer space surrounding the head section and the space which is formed between the head section, the guide tube and a stop ring on the guide tube, which can in particular form an inner guide for the head section of the control sleeve. As a result, the control sleeve can move forward unhindered.
- the vent hole in the rear portion of the head portion ie adjacent to the movable connection, is formed to vent over the entire displacement path of the head portion of the control sleeve to the guide tube and ensure the stopper ring formed on the guide tube.
- the vent hole at or close to the counter element of the head portion which can cooperate with a stop on the stop ring, be formed. The vent hole can cut the counter element or be arranged adjacent to the counter element.
- Fig. 1 shows a ram boring device 1 for drilling in the ground. End of the ram boring device 1 is in the illustration of Fig. 1 left a drill head provided with a drill bit.
- the ram boring device 1 has a percussion piston 2 mounted within a housing 3.
- the percussion piston 2 can be driven for cyclic reciprocation in the housing 3.
- the percussion piston 2 In a first switching position, the percussion piston 2 impinges on a front impact surface in order to move the ram boring device 1 in a first direction of movement (in the in Fig. 1 illustrated embodiment to the left).
- a second switching position of the percussion piston 2 strikes a rear impact surface to the ram boring device in a second direction of movement (in the in Fig. 1 illustrated embodiment to the right) to drive.
- the ram boring device has a housing-fixed guide tube 5 and an on the guide tube 5 axially displaceable control sleeve 4.
- the percussion piston 2 is axially displaceable on the control sleeve 4.
- the control sleeve 4 temporarily engages in the percussion piston 2 in the axial displacement.
- the control sleeve 4 has two interconnected by means of a movable connection sections 7, 8, which are designed as a head portion 7 and 8 as the main body portion.
- the movable connection 6 is formed as an elastic connecting portion which is configured such that the two portions of the control sleeve 4 can pivot relative to each other.
- the movable connection 6 is connected to the main body portion 8 and the head portion 7 surrounds the elastic connection portion.
- the main body portion 8 of the control sleeve 4 is at least partially on the guide tube 5 at.
- the head portion 7 of the control sleeve 4 is spaced from the inside to the guide tube 5 is formed.
- the inner diameter of the head portion 7 of the control sleeve 4 is made larger than the outer diameter of the guide tube 5, in particular at the end remote from the main body portion 8.
- the head portion 7 has a smaller inner diameter than the end spaced from the main body portion 8 of the head section 7.
- a stop ring 12 Connected to the guide tube 5 is a stop ring 12, which has a stop for the control sleeve 4.
- a stop ring 12 On the head portion 7 of the control sleeve 4 is designed a correspondingly designed stop counter element, which in the in the Fig. 2 shown switching position of the control sleeve 4 to the guide tube 5 abuts the stop of the guide tube 5.
- the stop ring 12 may be with the outer periphery an inner guide for the head portion 7 of the control sleeve 4.
- annular space 10 is shown, which is formed between the guide tube 5 and a ring member 9 which is fixed to the guide tube 5 is formed.
- the annular space 10 is at least partially limited by the end face of the control sleeve 4 and is connected to a pressurizable with a fluid control line 11.
- the annular space 10 can be pressurized to extend the control sleeve 4 from the annular space 10. If the pressurization of the annular space 10 ends, a retraction or a return of the control sleeve 4 is effected by means of the pending on the control sleeve 4 operating pressure.
- Fig. 3 shows by way of example for the Fig. 2 a vent hole 13 which is formed in the head portion 7 of the control sleeve 4 to produce a pressure equalization.
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- 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)
Description
Die Erfindung betrifft eine Rammbohrvorrichtung.The invention relates to a ram boring device.
Rammvorrichtungen, wie sie insbesondere für die Herstellung von horizontalen Erdbohrvorrichtungen verwendet werden, werden in der Regel mittels eines Schlagkolbens angetrieben, der innerhalb des Gehäuses hin- und herbewegt wird und dabei, je nach gewünschter Bewegungsrichtung der Vorrichtung, auf einer vordere oder hintere Schlagfläche prallt. Die dadurch übertragene kinetische Energie des Schlagkolbens sorgt für eine Beschleunigung der Rammbohrvorrichtung innerhalb des Erdreichs.Ramming devices, as used in particular for the production of horizontal Erdbohrvorrichtungen are usually driven by a percussion piston, which is reciprocated within the housing and thereby, depending on the desired direction of movement of the device, bounces on a front or rear impact surface. The transmitted thereby kinetic energy of the percussion piston ensures an acceleration of the ram boring device within the soil.
Im Allgemeinen wird eine Umsteuerung der Bewegungsrichtung dadurch erreicht, dass die mittlere Lage (zwischen den zwei Wendepunkten) des Schlagkolbens von einer vorderen zu einer hinteren Stellung - oder anders herum - verschoben wird. Somit trifft der Schlagkolben, je nach Stellung, entweder auf die vordere oder hintere Schlagfläche auf und definiert dadurch die Bewegungsrichtung der Vorrichtung.In general, a reversal of the direction of movement is achieved in that the middle position (between the two turning points) of the percussion piston from a front to a rear position - or vice versa - is moved. Thus, depending on the position, the percussion piston strikes either the front or rear striking surface and thereby defines the direction of movement of the device.
Aus dem Stand der Technik sind verschiedene Ausführungen bekannt, mit denen die mittlere Lage des Schlagkolbens verschoben und folglich die Bewegungsrichtung der Vorrichtung verändert werden kann.Various designs are known from the prior art, with which the center position of the percussion piston displaced and consequently the direction of movement of the device can be changed.
Zur Steuerung der Bewegungsrichtung wird meist ein gehäusefestes Führungsrohr und eine auf dem Führungsrohr axial verschiebbare Steuerhülse verwendet, auf der der Schlagkolben axial verschiebbar ist. Insbesondere, wenn der Schlagkolben auf der Steuerhülse axial verschiebbar ist und die Steuerhülse eine große Länge aufweist, kann es auftreten, dass der Schlagkolben bei der Bewegung auf die Steuerhülse einwirkt und beispielsweise die Steuerhülse verwindet, wodurch die Lebensdauer der Steuerhülse verringert sein kann, welches erhöhte Reparatur- und/oder Wartungskosten bedingt. Ferner kann in diesem Fall durch eine erhöhte Reibung die Leistung einer Rammbohrvorrichtung stark reduziert sein. Weiterhin ist es möglich, dass sich das Gehäuse der Rammbohrvorrichtung durch seitliche Kräfte im Erdreich verbiegt. Es kann dann zum Winkelversatz zwischen Steuerhülse und Schlagkolben kommen, wodurch der Schlagkolben und so die gesamte Rammbohrvorrichtung zum Stillstand gelangen.To control the direction of movement usually a housing-fixed guide tube and an axially displaceable on the guide tube control sleeve is used, on which the percussion piston is axially displaceable. In particular, when the percussion piston is axially displaceable on the control sleeve and the control sleeve has a large length, it can occur that the percussion piston acts on the movement of the control sleeve and, for example, the control sleeve twisted, whereby the life of Control sleeve can be reduced, which requires increased repair and / or maintenance costs. Furthermore, in this case, the performance of a ram boring device can be greatly reduced by increased friction. Furthermore, it is possible that the housing of the ram boring device bends by lateral forces in the ground. It can then come to the angular offset between the control sleeve and percussion piston, causing the percussion piston and thus the entire ram boring device come to a standstill.
Aufgabe der Erfindung ist es daher, eine verbesserte Rammbohrvorrichtung zu schaffen, die eine verbesserte Leistung, eine höhere Standzeit, eine geringere Neigung zum Festlaufen und/oder erhöhte Lebensdauer aufweisen kann.The object of the invention is therefore to provide an improved Rammbohrvorrichtung, which may have improved performance, a longer service life, a lower tendency to stall and / or increased life.
Diese Aufgabe wird durch den Gegenstand des Patentanspruchs 1 gelöst. Vorteilhafte Ausführungen sind in den abhängigen Patentansprüchen genannt.This object is solved by the subject matter of patent claim 1. Advantageous embodiments are mentioned in the dependent claims.
Kerngedanke der Erfindung ist es, dass die Steuerhülse mindestens zwei Abschnitte aufweist, insbesondere in Längsrichtung, die mittels einer beweglichen Verbindung, die als elastischer Verbindungsabschnitt und/oder als Gelenk ausgestaltet sein kann, miteinander verbunden sind. Hierdurch kann auch eine erhöhte Länge der Steuerhülse erreicht werden und einer plastisch wirkenden, die Steuerhülse um- bzw. verformende Einwirkung wird aufgrund der beweglichen Verbindung verhindert. Die bewegliche Verbindung kann für einen der beiden Abschnitte der Steuerhülse eine einem Loslager entsprechende Funktion aufweisen. Der Abschnitt kann insbesondere beabstandet von der beweglichen Verbindung keinen Kontakt zum Führungsrohr aufweisen. Die bewegliche Verbindung kann ein Gleitlager für einen der beiden Abschnitte bilden und für den anderen der beiden Abschnitte ein Loslager. Die bewegliche Verbindung kann am Führungsrohr gelagert sein, um die axiale Verschiebbarkeit zum Führungsrohr durchzuführen, und zudem ein Verschwenken eines Abschnitts zum Führungsrohr zu ermöglichen.The core idea of the invention is that the control sleeve has at least two sections, in particular in the longitudinal direction, which are connected to each other by means of a movable connection, which may be designed as an elastic connecting portion and / or as a joint. In this way, an increased length of the control sleeve can be achieved and a plastically acting, the control sleeve um- or deforming action is prevented due to the movable connection. The movable connection may have a function corresponding to a movable bearing for one of the two sections of the control sleeve. In particular, the section can not be in contact with the guide tube at a distance from the movable connection. The movable connection may form a sliding bearing for one of the two sections and a movable bearing for the other of the two sections. The movable connection may be mounted on the guide tube to perform the axial displacement of the guide tube, and also to allow pivoting of a portion to the guide tube.
Die Erfindung schafft eine Rammbohrvorrichtung mit einem innerhalb eines Gehäuses gelagerten, in einer zyklischen Hin- und Herbewegung angetriebenen Schlagkolben. Der Schlagkolben trifft in einer ersten Schaltstellung auf eine vordere Schlagfläche, um die Rammbohrvorrichtung in einer ersten Bewegungsrichtung anzutreiben. In einer zweiten Schaltstellung trifft der Schlagkolben auf eine hintere Schlagfläche auf, um die Rammbohrvorrichtung in einer zweiten Bewegungsrichtung anzutreiben. Für das Umschalten zwischen den beiden Bewegungsrichtungen weist die Rammbohrvorrichtung ein gehäusefestes Führungsrohr und eine auf dem Führungsrohr axial verschiebbare Steuerhülse auf. Der Schlagkolben ist auf der Steuerhülse axial verschiebbar. Die Steuerhülse weist zwei mittels einer beweglichen Verbindung miteinander verbundene Abschnitte auf.The invention provides a ram boring device with a percussion piston mounted within a housing and driven in a cyclical reciprocating motion. The percussion piston strikes a front striking surface in a first switching position in order to drive the ram boring device in a first direction of movement. In a second switching position hits the percussion piston on a rear striking surface to drive the ram boring device in a second direction of movement. For the switching between the two directions of movement, the ram boring device has a housing-fixed guide tube and an axially displaceable on the guide tube control sleeve. The percussion piston is axially displaceable on the control sleeve. The control sleeve has two sections connected to one another by means of a movable connection.
Die Verbindung der beiden Abschnitte der Steuerhülse mittels der beweglichen Verbindung kann mittelbar oder unmittelbar über die Verbindung erfolgen. Es kann vorgesehen sein, dass beispielsweise zwischen einem elastischen Verbindungsabschnitt und/oder einem Gelenk als bewegliche Verbindung und den beiden Abschnitten weitere Abschnitte vorgesehen sein können. Ferner ist die Steuerhülse nicht auf das Vorhandensein der beiden Abschnitte mit einem Verbindungsabschnitt und/oder einem Gelenk beschränkt. Zusätzlich zu den beiden Abschnitten und dem Verbindungsabschnitt und/oder dem Gelenk können weitere Abschnitte der Steuerhülse vorgesehen sein.The connection of the two sections of the control sleeve by means of the movable connection can be made directly or indirectly via the connection. It can be provided that, for example, further sections can be provided between an elastic connection section and / or a joint as a movable connection and the two sections. Furthermore, the control sleeve is not limited to the presence of the two sections with a connecting portion and / or a joint. In addition to the two sections and the connecting section and / or the joint, further sections of the control sleeve can be provided.
Eine erfindungsgemäße "Rammbohrvorrichtung" umfasst ein selbstgetriebenes Schlaggerät, welches Erdreich verdrängend arbeitet, und eine Leitung oder ein Rohr schlagend in das Erdreich einbringen kann. Der Begriff "Erdreich" im Sinne der vorliegenden Erfindung umfasst 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 Wasserkanäle, die sich durch Einsatz einer entsprechenden Rammbohrvorrichtung herstellen oder einziehen lassen.A "Rammbohrvorrichtung" according to the invention comprises a self-propelled impact device, which works soil displacing, and can bring a pipe or a pipe beating in the soil. The term "soil" in the context of the present invention includes in particular any type of existing or to be created, preferably horizontal channels in a body, in particular earth channels including earth bores, rock holes or ground lines and underground or above-ground pipelines and water channels, by using a corresponding Rammbohrvorrichtung make or feed.
Die Begriffe "Verbindungsabschnitt" und "Gelenk" umfassen die Ausbildung einer beweglichen bzw. gelenkigen Verbindung der beiden Abschnitte der Steuerhülse, die eine relative Bewegung der beiden Abschnitte zueinander, insbesondere eine dreiachsige, zweiachsige oder einachsige Bewegung, ermöglicht, wobei insbesondere eine Schwenkbewegung der beiden Abschnitte relativ zueinander möglich ist.The terms "connecting portion" and "joint" include the formation of a movable or articulated connection of the two portions of the control sleeve, which allows relative movement of the two sections to each other, in particular a three-axis, biaxial or uniaxial movement, in particular a pivoting movement of the two Sections relative to each other is possible.
In einer bevorzugten Ausführungsform ist die Verbindung mittels eines Verbindungsabschnitts und/oder Gelenks zwischen einem Kopfabschnitt und einem Hauptkörperabschnitt der Steuerhülse ausgebildet. Der Hauptkörperabschnitt der Steuerhülse kann zumindest teilweise am Führungsrohr anliegen. Der Kopfabschnitt der Steuerhülse ist zumindest endseitig, d.h. beabstandet zur beweglichen Verbindung, beabstandet zum Führungsrohr ausgebildet und wird an dem endseitigen Bereich des Kopfabschnitts der Steuerhülse nicht am Führungsrohr gelagert, sondern Schlagkolben und Kopfabschnitt der Steuerhülse bilden Führungsflächen relativ zueinander aus, entlang derer der Schlagkolben relativ zur Steuerhülse axial verschiebbar ist.In a preferred embodiment, the connection is formed by means of a connecting portion and / or joint between a head portion and a main body portion of the control sleeve. The main body portion of the control sleeve may at least partially rest against the guide tube. The head portion of the control sleeve is at least end, i. spaced from the movable connection, spaced from the guide tube and formed at the end portion of the head portion of the control sleeve is not supported on the guide tube, but percussion piston and head portion of the control sleeve form guide surfaces relative to each other, along which the percussion piston is axially displaceable relative to the control sleeve.
Die beiden Abschnitte der Steuerhülse weisen in einer bevorzugten Ausführungsform unterschiedliche Außendurchmesser und insbesondere unterschiedliche Innendurchmesser auf. Der Innendurchmesser des einen Abschnitts, insbesondere des Hauptkörperabschnitts, ist entsprechend an den Außendurchmesser des Führungsrohrs angepasst, um axial gegenüber diesem verschiebbar zu sein. Der Außendurchmesser des Führungsrohrs entspricht im Wesentlichen dem Innendurchmesser des ersten Abschnitts, insbesondere des Hauptkörperabschnitts. Der Außendurchmesser des ersten Abschnitts, insbesondere des Hauptkörperabschnitts, ist derart ausgestaltet, dass ein Kontakt mit dem Schlagkolben nicht möglich ist. Der erste Abschnitt, insbesondere Hauptkörperabschnitt, weist Führungsflächen für die relative Führung von erstem Abschnitt an dem Führungsrohr auf. Der Innendurchmesser des zweiten Abschnitts, insbesondere des Kopfabschnitts, ist derart ausgestaltet, dass kein Kontakt im endseitigen Bereich des zweiten Abschnitts mit der Führungshülse vorliegt. Der Außendurchmesser des zweiten Abschnitts, insbesondere des Kopfabschnitts, ist an einen Innendurchmesser des Schlagkolbens angepasst, um Führungsflächen für die relative axiale Verschiebbarkeit des Schlagkolbens zur Steuerhülse auszubilden. Die beiden Abschnitte können mittelbar oder unmittelbar mittels der beweglichen Verbindung - aufweisend den elastischen Verbindungsabschnitt und/oder das Gelenk - miteinander verbunden sein.In a preferred embodiment, the two sections of the control sleeve have different outer diameters and in particular different inner diameters. The inner diameter of the one portion, in particular of the main body portion, is correspondingly adapted to the outer diameter of the guide tube so as to be axially displaceable relative thereto. The outside diameter of the Guide tube substantially corresponds to the inner diameter of the first portion, in particular of the main body portion. The outer diameter of the first portion, in particular of the main body portion, is designed such that a contact with the percussion piston is not possible. The first section, in particular the main body section, has guide surfaces for the relative guidance of the first section to the guide tube. The inner diameter of the second section, in particular of the head section, is configured in such a way that there is no contact in the end region of the second section with the guide sleeve. The outer diameter of the second portion, in particular of the head portion, is adapted to an inner diameter of the percussion piston to form guide surfaces for the relative axial displaceability of the percussion piston to the control sleeve. The two sections can be connected to each other directly or indirectly by means of the movable connection, comprising the elastic connection section and / or the hinge.
In einer bevorzugten Ausführungsform sind die beiden Abschnitte der Steuerhülse auf dem Führungsrohr relativ zueinander verschwenkbar. Insbesondere kann der dem Schlagkolben zugewandte Abschnitt gegen den anderen der beiden Abschnitte verschwenkbar sein. Es kann vorgesehen sein, dass der eine der Abschnitte, der gegen den anderen verschwenkbar ist, auch relativ zum Führungsrohr verschwenkbar sein kann, sofern der andere der beiden Abschnitte axial verschieblich an dem Führungsrohr fest gelagert ist.In a preferred embodiment, the two sections of the control sleeve on the guide tube are pivotable relative to each other. In particular, the section facing the percussion piston can be pivoted against the other of the two sections. It can be provided that the one of the sections, which is pivotable against the other, can also be pivotable relative to the guide tube, provided that the other of the two sections is mounted axially displaceably on the guide tube.
In einer bevorzugten Ausführungsform liegt der elastische Verbindungsabschnitt und/oder ein Teilabschnitt des Gelenks zumindest teilweise an dem Führungsrohr an und wird axial verschieblich zusammen mit der Steuerhülse gegenüber dem Führungsrohr geführt, um ein Lager für einen der Abschnitte zu bilden, mittels dessen der eine der Abschnitte einen zusätzlichen Freiheitsgrad der Bewegung zum Führungsrohr erhalten kann.In a preferred embodiment, the elastic connecting portion and / or a portion of the joint is at least partially against the guide tube and is axially displaceable together with the control sleeve relative to the guide tube to form a bearing for one of the sections, by means of which one of the sections can receive an additional degree of freedom of movement to the guide tube.
In einer bevorzugten Ausführungsform weist der elastische Verbindungsabschnitt und/oder das Gelenk eine Ringform mit einem L-förmigen Querschnitt auf, so dass ein Verschwenken eines der beiden Abschnitte aufgrund der geometrischen Ausbildung vereinfacht möglich ist.In a preferred embodiment, the elastic connecting portion and / or the joint has a ring shape with an L-shaped cross section, so that a pivoting of one of the two sections is simplified due to the geometric design.
In einer bevorzugten Ausführungsform umfasst der elastische Verbindungsabschnitt einen elastisch verformbaren Kunststoff, der insbesondere formfest sein kann. Der elastische Verbindungsabschnitt kann ein Elastomer bzw. einen Elastomer-Werkstoff oder ein elastisches Polymer, beispielsweise Kautschuk, umfassen. Der elastische Verbindungsabschnitt kann auch - alternativ oder zusätzlich - ein Polyurethan umfassen. Der Begriff "umfassen" deckt die Bedeutungsinhalte der Begriffe "aufweisen" und "bestehen aus" ab, so dass in dem einen Fall neben dem einen genannten Werkstoff bzw. chemischen Verbindung weitere Werkstoffe bzw. chemische Verbindungen vorhanden sein können und in dem anderen Fall der reine Werkstoff bis auf unvermeidbare Verunreinigungen vorliegt.In a preferred embodiment, the elastic connecting portion comprises an elastically deformable plastic, which may in particular be dimensionally stable. The elastic connecting portion may comprise an elastomer or an elastomeric material or an elastic polymer, for example rubber. The elastic connecting portion may also - alternatively or additionally - comprise a polyurethane. The term "comprising" covers the meaning contents of the terms "exhibit" and "consist of", so that in one case, in addition to the one mentioned material or chemical compound further materials or chemical compounds may be present and in the other case, the pure material is present except for unavoidable impurities.
In einer bevorzugten Ausführungsform weist das Führungsrohr einen Anschlag auf, wobei die Steuerhülse ein entsprechend ausgestaltetes Gegenelement aufweist, das in einer der Schaltstellungen am Anschlag des Führungsrohrs anliegt. Insbesondere kann das Gegenelement an dem Abschnitt ausgebildet bzw. mit diesem verbunden sein, das gegenüber dem Führungsrohr verschwenkbar ist. Hierdurch kann ermöglicht werden, dass die Steuerhülse in einer von dem Anschlag und dem Gegenelement definierten Schaltstellung gebracht werden kann.In a preferred embodiment, the guide tube has a stop, wherein the control sleeve has a correspondingly configured counter element, which rests in one of the switching positions on the stop of the guide tube. In particular, the counter-element may be formed on or connected to the portion which is pivotable relative to the guide tube. In this way it can be made possible that the control sleeve can be brought into a switching position defined by the stop and the counter element.
In einer bevorzugten Ausführungsform ist zwischen dem Führungsrohr und einem Ringelement, das insbesondere ortsfest zum Führungsrohr angeordnet ist, ein Ringraum ausgebildet. Der Ringraum wird zumindest teilweise stirnseitig durch die Steuerhülse bedeckt und ist mit einer mit einem Fluid druckbeaufschlagbaren Steuerleitung verbunden. Mittels der Steuerleitung kann der Ringraum mit Druck beaufschlagt werden, um die Steuerhülse aus dem Ringraum auszufahren. Hierdurch ist ein mit einfachen Mitteln durchführbares Umschalten möglich. Bei dem Fluid kann es sich sowohl um ein Druckgas, insbesondere Druckluft, oder eine Flüssigkeit handeln, so dass das Umschalten pneumatisch oder hydraulisch von der Schaltstellung vor dem Ausfahren der Steuerhülse aus dem Ringraum in die Schaltstellung mit aus dem Ringraum ausgefahrener Steuerhülse erfolgen kann. Nach Entlastung der Steuerleitung auf einen niedrigeren Druck, insbesondere Atmosphärendruck, bewirkt der an der Steuerhülse anstehende Betriebsdruck eine Rückstellung der Steuerhülse.In a preferred embodiment, an annular space is formed between the guide tube and a ring element, which is arranged in particular stationary relative to the guide tube. The annular space is at least partially covered by the end face of the control sleeve and is connected to a pressurizable with a fluid control line. By means of the control line, the annular space can be pressurized to extend the control sleeve from the annulus. As a result, a feasible with simple means switching is possible. The fluid may be either a compressed gas, in particular compressed air, or a liquid, so that the switching pneumatically or hydraulically from the switching position before the extension of the control sleeve from the annulus into the switching position can be done with extended from the annulus control sleeve. After relieving the control line to a lower pressure, in particular atmospheric pressure, the pending on the control sleeve operating pressure causes a provision of the control sleeve.
In einer bevorzugten Ausführungsform ist am vorderen der beiden Abschnitte der Steuerhülse, insbesondere am Kopfabschnitt, benachbart zur beweglichen Verbindung eine Entlüftungsbohrung ausgebildet, mit der ein Druckausgleich erreicht wird. Die Entlüftungsbohrung kann im vorderen der beiden Abschnitte und/oder in der beweglichen Verbindung ausgebildet sein. Der Druckausgleich kann zwischen dem den Kopfabschnitt umgebenden Außenraum und dem Raum, der zwischen dem Kopfabschnitt, dem Führungsrohr und einem Anschlagring am Führungsrohr, welcher insbesondere eine innere Führung für den Kopfabschnitt der Steuerhülse bilden kann, ausgebildet ist, erfolgen. Hierdurch kann sich die Steuerhülse ungehindert vorbewegen. In dem durch den Kopfabschnitt, das Führungsrohr und den Anschlagring gebildeten Raum baut sich dann kein Druck auf, der einer Bewegung der Steuerhülse nach vorne entgegenwirken würde. Vorzugsweise ist die Entlüftungsbohrung im hinteren Bereich des Kopfabschnitts, d.h. benachbart zur beweglichen Verbindung, ausgebildet, um eine Entlüftung über den gesamten Verschiebungsweg des Kopfabschnitts der Steuerhülse zum Führungsrohr und dem am Führungsrohr ausgebildeten Anschlagring sicherzustellen. Insbesondere kann die Entlüftungsbohrung am oder nahe zum Gegenelement des Kopfabschnitts, welches mit einem Anschlag am Anschlagring zusammenwirken kann, ausgebildet sein. Die Entlüftungsbohrung kann das Gegenelement schneiden oder benachbart zum Gegenelement angeordnet sein. -In a preferred embodiment, a vent hole is formed at the front of the two sections of the control sleeve, in particular at the head portion, adjacent to the movable connection, with which a pressure equalization is achieved. The vent hole may be formed in the front of the two sections and / or in the movable connection. The pressure equalization can take place between the outer space surrounding the head section and the space which is formed between the head section, the guide tube and a stop ring on the guide tube, which can in particular form an inner guide for the head section of the control sleeve. As a result, the control sleeve can move forward unhindered. In the space formed by the head portion, the guide tube and the stop ring then no pressure builds up, which would counteract a movement of the control sleeve forward. Preferably, the vent hole in the rear portion of the head portion, ie adjacent to the movable connection, is formed to vent over the entire displacement path of the head portion of the control sleeve to the guide tube and ensure the stopper ring formed on the guide tube. In particular, the vent hole at or close to the counter element of the head portion, which can cooperate with a stop on the stop ring, be formed. The vent hole can cut the counter element or be arranged adjacent to the counter element. -
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.The invention will be explained in more detail with reference to an embodiment shown in the drawings.
In den Zeichnungen zeigt:
- Fig. 1
- eine Rammbohrvorrichtung in teilweise geschnittener Darstellung;
- Fig. 2
- die Rammbohrvorrichtung von
Fig. 1 in vergrößerter Darstellung mit ausgefahrenem Steuerrohr; und - Fig. 3
- die Darstellung gemäß
Fig. 2 mit eingefahrenem Steuerrohr.
- Fig. 1
- a ram boring device in a partially sectioned view;
- Fig. 2
- the ram boring device of
Fig. 1 in an enlarged view with extended head tube; and - Fig. 3
- the representation according to
Fig. 2 with retracted head tube.
Zum Umschalten der Bewegungsrichtungen weist die Rammbohrvorrichtung ein gehäusefestes Führungsrohr 5 und eine auf dem Führungsrohr 5 axial verschiebbare Steuerhülse 4 auf. Der Schlagkolben 2 ist auf der Steuerhülse 4 axial verschiebbar. Insbesondere der
Die Steuerhülse 4 weist zwei mittels einer beweglichen Verbindung miteinander verbundene Abschnitte 7, 8 auf, die als Kopfabschnitt 7 und als Hauptkörperabschnitt 8 ausgestaltet sind. Im in den
Der Hauptkörperabschnitt 8 der Steuerhülse 4 liegt zumindest teilweise am Führungsrohr 5 an. Der Kopfabschnitt 7 der Steuerhülse 4 ist innenseitig beabstandet zum Führungsrohr 5 ausgebildet. Der Innendurchmesser des Kopfabschnitts 7 der Steuerhülse 4 ist insbesondere am von dem Hauptkörperabschnitt 8 beabstandeten Ende größer ausgestaltet als der Außendurchmesser des Führungsrohrs 5. An dem dem Hauptkörperabschnitt 8 benachbarten Ende des Kopfabschnitts 7 weist der Kopfabschnitt 7 einen geringeren Innendurchmesser als am dem Hauptkörperabschnitt 8 beabstandeten Ende des Kopfabschnitts 7 auf.The
Mit dem Führungsrohr 5 verbunden ist ein Anschlagring 12, der einen Anschlag für die Steuerhülse 4 aufweist. Hierzu ist an dem Kopfabschnitt 7 der Steuerhülse 4 ein dem Anschlag entsprechend ausgestaltetes Gegenelement ausgestaltet, das in der in der
In der
Claims (10)
- Percussion drilling device (1) with a percussion piston (2) which is supported within a housing (3) and is driven in a cyclic back-and-forth motion, wherein, in a first switching position, the percussion piston (2) impinges on a front percussion surface in order to drive the percussion drilling device (1) in a first direction of motion and, in a second switching position, said percussion piston impinges on a rear percussion surface in order to drive the percussion drilling device (1) in a second direction of motion, wherein, in order to switch between the directions of motion, a guide tube (5) fastened to the housing and a control sleeve (4) axially slidable on the guide tube (5) are provided and the percussion piston (2) is axially slidable on the control sleeve (4), characterised in that the control sleeve (4) has two sections (7, 8) which are connected to each other by means of a movable connection (6).
- Percussion drilling device (1) according to claim 1, characterised in that the movable connection (6) is formed between a head section (7) and a main body section (8) of the control sleeve (4).
- Percussion drilling device (1) according to claim 1 or 2, wherein the two sections (7, 8) have different outer diameters at least in areas.
- Percussion drilling device (1) according to any one of claims 1 to 3, characterised in that the two sections (7, 8) can be swivelled on the guide tube (5) relative to one another.
- Percussion drilling device (1) according to any one of claims 1 to 4, characterised in that the movable connection (6) is designed as an elastic connecting section and/or as a joint and fits at least partly on the guide tube (5).
- Percussion drilling device (1) according to any one of claims 1 to 5, characterised in that the movable connection (6) is circular in shape and has an L-shaped cross section.
- Percussion drilling device (1) according to any one of claims 1 to 6, characterised in that the movable connection (6) comprises an elastic plastic.
- Percussion drilling device (1) according to any one of claims 1 to 7, characterised in that the guide tube (5) has a stop and the control sleeve (4) has a correspondingly designed counter element which fits in one of the switching positions on the stop.
- Percussion drilling device (1) according to any one of claims 1 to 8, characterised in that, between the guide tube (5) and a ring element (9), an annulus (10) is formed whose face is covered, at least partly, by the control sleeve (4) and the annulus (10) is connected to a control line (11) which can be pressurised with a fluid.
- Percussion drilling device (1) according to any one of claims 1 to 9, characterised in that a ventilation hole (13) is formed a front section of the two sections (7, 8) adjacent to the movable connection (6) and/or a ventilation hole is formed in the movable connection (6).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015008340.6A DE102015008340A1 (en) | 2015-07-01 | 2015-07-01 | "Ram drilling apparatus" |
PCT/EP2016/001092 WO2017001053A1 (en) | 2015-07-01 | 2016-06-28 | Percussion drilling device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3317486A1 EP3317486A1 (en) | 2018-05-09 |
EP3317486B1 true EP3317486B1 (en) | 2019-08-14 |
Family
ID=56368922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16735992.6A Active EP3317486B1 (en) | 2015-07-01 | 2016-06-28 | Percussion drilling device |
Country Status (5)
Country | Link |
---|---|
US (1) | US10480246B2 (en) |
EP (1) | EP3317486B1 (en) |
AU (1) | AU2016286192B2 (en) |
DE (1) | DE102015008340A1 (en) |
WO (1) | WO2017001053A1 (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5172771A (en) | 1990-11-06 | 1992-12-22 | Charles Machine Works, Inc. | Reversible impact-operated boring tool |
DE29518159U1 (en) * | 1995-11-16 | 1996-01-04 | Tracto-Technik Paul Schmidt Spezialmaschinen, 57368 Lennestadt | Control for the forward and return of ram boring machines |
DE102009038385B4 (en) * | 2009-08-24 | 2014-05-28 | Tracto-Technik Gmbh & Co. Kg | Rammbohrvorrichtung with a pneumatic drive and a hydraulic reversal of the direction of movement |
-
2015
- 2015-07-01 DE DE102015008340.6A patent/DE102015008340A1/en not_active Withdrawn
-
2016
- 2016-06-28 WO PCT/EP2016/001092 patent/WO2017001053A1/en active Application Filing
- 2016-06-28 US US15/739,583 patent/US10480246B2/en active Active
- 2016-06-28 EP EP16735992.6A patent/EP3317486B1/en active Active
- 2016-06-28 AU AU2016286192A patent/AU2016286192B2/en active Active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
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AU2016286192A1 (en) | 2018-02-01 |
EP3317486A1 (en) | 2018-05-09 |
US10480246B2 (en) | 2019-11-19 |
US20180363375A1 (en) | 2018-12-20 |
AU2016286192B2 (en) | 2019-06-06 |
DE102015008340A1 (en) | 2017-01-05 |
WO2017001053A1 (en) | 2017-01-05 |
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