EP0391119A1 - Elément de connexion pour un raccord vissé de boulons d'ancrage à injection auto-forants - Google Patents

Elément de connexion pour un raccord vissé de boulons d'ancrage à injection auto-forants Download PDF

Info

Publication number
EP0391119A1
EP0391119A1 EP90105130A EP90105130A EP0391119A1 EP 0391119 A1 EP0391119 A1 EP 0391119A1 EP 90105130 A EP90105130 A EP 90105130A EP 90105130 A EP90105130 A EP 90105130A EP 0391119 A1 EP0391119 A1 EP 0391119A1
Authority
EP
European Patent Office
Prior art keywords
thread
connecting element
internal thread
base surface
cylindrical
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
EP90105130A
Other languages
German (de)
English (en)
Other versions
EP0391119B1 (fr
Inventor
Ernst F. Ischebeck
Jochen Isenberg
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.)
Friedr Ischebeck GmbH
Original Assignee
Friedr Ischebeck GmbH
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 Friedr Ischebeck GmbH filed Critical Friedr Ischebeck GmbH
Publication of EP0391119A1 publication Critical patent/EP0391119A1/fr
Application granted granted Critical
Publication of EP0391119B1 publication Critical patent/EP0391119B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods

Definitions

  • the invention relates to a connecting element, in particular a coupling sleeve, for a screw connection of self-drilling injection anchors or associated parts.
  • the connecting element has an internal thread formed on a cylindrical base surface, the injection anchor or the associated part having a corresponding external thread formed on a cylindrical base surface.
  • the assigned part can in particular be a drill bit for an anchor part.
  • Injection anchors of this type are used in construction for a wide variety of purposes. For example in tunnel construction to ensure vaulting. The injection anchors are driven approximately radially to the vault into the surrounding rock and anchored there by flushed-in concrete. There are also a number of different other possible uses.
  • an injection anchor is composed of several anchor elements during the driving into the ground or a rock layer, which then remain in the rock or the like.
  • the anchor elements are connected to each other by coupling sleeves.
  • the coupling sleeves have a cylindrical internal thread, so that one end of the anchor element can be screwed into both end regions of the coupling sleeve.
  • the internal threads run out approximately in the middle of the coupling sleeve.
  • the coupling sleeve forms a circumferential shoulder in the end region of the internal thread, against which the end faces of the screwed-in ends of the anchor elements abut.
  • connection point in the area of the end face of the anchor end, which Surface meets the mentioned circumferential shoulder in the socket, relative movements occur when drilling. This can result in heating at the connection point, which leads to a reduction in strength and can trigger a permanent fracture in the coupling sleeve.
  • injection anchors in particular, and they are the connecting coupling sleeves are lost parts which, as mentioned, remain in the rock or the like. It is therefore also sought to design these elements as inexpensively as possible.
  • the object of the invention is to provide a connecting element, in particular a coupling sleeve, for self-drilling injection anchors, for example, which has an increased utility value while being inexpensive to produce.
  • a conically tapering base surface adjoins the cylindrical base surface of the internal thread, on which surface the internal thread continues. If the element to be screwed in remains unchanged, for example the end of an injection anchor, it is thereby achieved that jamming first occurs when the screw is screwed in when the thread runout of the injection anchor reaches the transition to the conically tapering region in the internal thread of the connecting element. During the subsequent impact drilling, an end region of the screwed-in element is driven into the conical region to a certain extent, specifically by adapting to the conical region by cold deformation.
  • the cone angle in the conical area is larger than the critical angle for self-locking of the material pairing at the connection point.
  • the critical angle for steel is approximately 6 °. It is preferred to select the cone angle well above this angle for self-locking in the conical area.
  • the material pairing steel on steel it is preferred to choose a cone angle of approximately 10 °. If the connecting element is designed as a coupling sleeve, this is designed symmetrically with respect to an approximately central cross section.
  • a conically widening region with an internal thread connects accordingly in both directions and then a cylindrical region with an internal thread, the thread profile in the cylindrical and the conical region being the same on both sides.
  • the internal thread is a so-called cord thread, as can be seen in detail from the attached drawing, which will be discussed further below.
  • the cord thread is like a tra pez thread with rounded flanks.
  • the cylindrical region is preferably formed with a length that corresponds approximately to one and a half times the outer thread diameter of the internal thread in this region.
  • the conical region is preferably formed with a length which corresponds to approximately 1/3 of the outer thread diameter in the cylindrical region.
  • FIG. 1 Shown and described is a coupling sleeve 1 (FIG. 1), which is connected to an end region of an injection anchor 2, not shown in detail, and a unit transition sleeve 3 (FIG. 3), which is described in detail below.
  • Injection anchors in which coupling sleeves according to FIG. 1 or unit transition sleeves according to FIG. 3 are preferably used, are known for example from DE-OS 34 00 182.
  • the coupling sleeve 1 shown in Fig. 1 has two inner cylindrical regions a, to each of which one conical area b connects.
  • a thread profile is formed on a cylindrical base surface and in the conical region b, the thread profile is formed on a conical base surface.
  • the thread profiling is the same in both areas with regard to the geometric dimensions such as thread depth, thread pitch and cross-sectional area of a thread rib.
  • the thread profiles differ only in that the thread profile is formed on the conical surface in the conical area b.
  • a cone angle alpha of the conical area b is larger than the critical angle for self-locking in the underlying material pairing.
  • the coupling sleeve, the unit transition sleeve and also the anchor parts each consist of cast steel, for which a critical angle for self-friction of approximately 6 ° is assumed.
  • the angle alpha of the conical area is preferably significantly larger, in the exemplary embodiment approximately 10 °.
  • the coupling sleeve 1 is symmetrical.
  • the internal thread 8 of the coupling sleeve 1 is preferably a cord thread, as is shown in detail in FIG. 2. It is essentially a trapezoidal thread with rounded transitions 4 of the flanks 5 into the cylindrical section 6.
  • the transition sleeve 3 shown in FIG. 3 is used to connect an anchor part 2 (not shown) with, for example, the output of a hammer drill (also not shown).
  • the anchor part 2 is screwed in on the left side in FIG. 3, while the drive part of the rotary hammer is screwed into the transition sleeve on the right side in FIG. 3.
  • the internal thread 8 on the left side of the transition sleeve 3 is also divided into a cylindrical region a and a conical region b in the object according to FIG. 3.
  • 1 corresponds approximately to 1 1/2 times the outer thread diameter c, this length is chosen somewhat larger for the object according to FIG. 3. It corresponds to approximately 1.8 times.
  • the length of the area b corresponds to approximately one third to half of the length of an outer diameter of the internal thread 8 in the area of the section a.
  • the length of this section is of less importance, as will be explained in more detail below, since it is not fully used. However, it is important that it at least exceed the length of a thread.
  • connection element is also to be understood as an end element, for example as a drill bit, in the context of this application.
  • the connecting element When the connecting element is screwed onto the end of an injection anchor 2 or the like, the connecting element can easily be screwed on until the screwed-in end of the injection anchor hits the transition to the conical area. A punctiform jamming occurs in this area.
  • the injection anchor 2 and the connecting element are subsequently subjected to a rotating impact by the hammer drill to be connected. This leads to a forming process in the front area of the injection anchor end.
  • the end of the injection anchor 2 adapts to the conical region b of the internal thread 8 by means of cold deformation.
  • the injection anchors are designed with an inner channel 7 for the passage of flushing liquid or a concrete mass.
  • rinsing liquid or concrete mass can escape at undesired locations. At the same time, this is reliably prevented by the training described here.
  • the threaded connection can also be loosened well.
  • the large cone angle of preferably approximately 10 ° mentioned is of importance. Thread seizure can be prevented by greasing the rod ends well.
  • the consolidation at the end region of the injection anchor 2 also has an advantageous effect, due to the cold deformation and also a certain consolidation of the corresponding region of the internal thread 8 of the coupling sleeve 1 or the transition sleeve 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Dowels (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Joints That Cut Off Fluids, And Hose Joints (AREA)
EP90105130A 1989-04-01 1990-03-19 Elément de connexion pour un raccord vissé de boulons d'ancrage à injection auto-forants Expired - Lifetime EP0391119B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3910627 1989-04-01
DE3910627A DE3910627A1 (de) 1989-04-01 1989-04-01 Verbindungselement

Publications (2)

Publication Number Publication Date
EP0391119A1 true EP0391119A1 (fr) 1990-10-10
EP0391119B1 EP0391119B1 (fr) 1992-06-17

Family

ID=6377659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105130A Expired - Lifetime EP0391119B1 (fr) 1989-04-01 1990-03-19 Elément de connexion pour un raccord vissé de boulons d'ancrage à injection auto-forants

Country Status (6)

Country Link
EP (1) EP0391119B1 (fr)
AT (1) ATE77440T1 (fr)
DE (2) DE3910627A1 (fr)
DK (1) DK0391119T3 (fr)
ES (1) ES2033553T3 (fr)
GR (1) GR3004945T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996017153A1 (fr) * 1994-11-25 1996-06-06 Gd-Anker-Mai-Pump Gesellschaft Mbh Accouplement de tiges d'ancrage
WO1997031177A1 (fr) * 1996-02-21 1997-08-28 Atlas Copco Rock Drills Ab Element pour ancrage forme de pieces tubulaires jointes
WO2003008763A1 (fr) * 2001-07-19 2003-01-30 Atlas Copco Mai Gmbh Assemblage d'une tige d'ancrage et d'un outil de forage
WO2012072734A1 (fr) * 2010-12-03 2012-06-07 Friedr. Ischebeck Gmbh Élément d'accouplement, notamment pour relier des tiges de boulon d'ancrage
WO2016188857A1 (fr) * 2015-05-22 2016-12-01 Sandvik Intellectual Property Ab Extrémité à raccord fileté pour élément de train de tiges de forage à percussion

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4127249C1 (fr) * 1991-08-17 1993-02-04 Gd-Anker Gmbh, 3370 Seesen, De
DE4220636B4 (de) * 1992-06-24 2004-07-08 Friedr. Ischebeck Gmbh Verbindungselement, insbesondere Kupplungsmuffe, für eine Schraubverbindung von Injektionsankerstangen von Injektionsankern
DE19541163A1 (de) * 1995-11-04 1997-05-07 Hawera Probst Kg Hartmetall Bohrwerkzeug, insbesondere zur Bearbeitung von Gestein
DE102010016484A1 (de) 2009-08-20 2011-02-24 Friedr. Ischebeck Gmbh Kupplung für das Verbinden von Ankerstangen
CH702595B1 (de) 2010-01-28 2018-09-14 Kuechler Technik Ag Bohrankerdichtung und Selbstbohranker mit einer solchen Bohrankerdichtung.
GB2563002B (en) * 2017-05-22 2019-06-26 Rand York Castings Pty Ltd A rock bolt coupling system, and method of manufacture

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE568114C (de) * 1930-11-14 1933-01-14 Dardelet Threadlock Corp Schraubverbindung fuer Gestaenge in Bohrloechern
US1952996A (en) * 1931-11-19 1934-03-27 Flannery Bolt Co Drill
US3537738A (en) * 1968-04-15 1970-11-03 Sandvikens Jernverks Ab Drill rod for long hole drilling in the ground
US4588213A (en) * 1983-10-05 1986-05-13 Thread Technology International, Inc. Threaded pipe connection
US4770448A (en) * 1986-09-12 1988-09-13 Landell International Company, Inc. Pipe coupling

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2818292A (en) * 1954-04-23 1957-12-31 Carl D Graber Rock drill
JPS6057519B2 (ja) * 1981-08-20 1985-12-16 住友金属工業株式会社 耐焼付性に優れた油井管継手およびその製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE568114C (de) * 1930-11-14 1933-01-14 Dardelet Threadlock Corp Schraubverbindung fuer Gestaenge in Bohrloechern
US1952996A (en) * 1931-11-19 1934-03-27 Flannery Bolt Co Drill
US3537738A (en) * 1968-04-15 1970-11-03 Sandvikens Jernverks Ab Drill rod for long hole drilling in the ground
US4588213A (en) * 1983-10-05 1986-05-13 Thread Technology International, Inc. Threaded pipe connection
US4770448A (en) * 1986-09-12 1988-09-13 Landell International Company, Inc. Pipe coupling

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996017153A1 (fr) * 1994-11-25 1996-06-06 Gd-Anker-Mai-Pump Gesellschaft Mbh Accouplement de tiges d'ancrage
US5888025A (en) * 1994-11-25 1999-03-30 Mai Pump Austria Gmbh Coupling for tie rods
WO1997031177A1 (fr) * 1996-02-21 1997-08-28 Atlas Copco Rock Drills Ab Element pour ancrage forme de pieces tubulaires jointes
US5997219A (en) * 1996-02-21 1999-12-07 Atlas Copco Rock Drill Ab Tube-formed expansion rock bolt
US7044678B2 (en) 2001-07-19 2006-05-16 Atlas Copco Mai Gmbh Connecting an anchoring rod to a drilling tool
JP2004522030A (ja) * 2001-07-19 2004-07-22 アトラス・コプコ・エムエイアイ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング 穿孔用ロッドへのアンカーロッドの連結
WO2003008763A1 (fr) * 2001-07-19 2003-01-30 Atlas Copco Mai Gmbh Assemblage d'une tige d'ancrage et d'un outil de forage
CN100378294C (zh) * 2001-07-19 2008-04-02 阿特拉斯·科普科Mai有限公司 用于连接锚杆与钻孔机的装置
AT8246U3 (de) * 2001-07-19 2010-02-15 Atlas Copco Mai Gmbh Verbindung einer ankerstange mit einem bohrgerät
WO2012072734A1 (fr) * 2010-12-03 2012-06-07 Friedr. Ischebeck Gmbh Élément d'accouplement, notamment pour relier des tiges de boulon d'ancrage
US9605780B2 (en) 2010-12-03 2017-03-28 Friedr. Ishebeck GmbH Coupling, in particular for connecting anchor rods
WO2016188857A1 (fr) * 2015-05-22 2016-12-01 Sandvik Intellectual Property Ab Extrémité à raccord fileté pour élément de train de tiges de forage à percussion
US10627023B2 (en) 2015-05-22 2020-04-21 Sandvik Intellectual Property Ab Threaded coupling end for a percussion drill string component
AU2016266599B2 (en) * 2015-05-22 2020-09-10 Sandvik Intellectual Property Ab Threaded coupling end for a percussion drill string component

Also Published As

Publication number Publication date
GR3004945T3 (fr) 1993-04-28
EP0391119B1 (fr) 1992-06-17
ATE77440T1 (de) 1992-07-15
DK0391119T3 (da) 1992-08-10
DE59000166D1 (de) 1992-07-23
DE3910627C2 (fr) 1991-11-14
DE3910627A1 (de) 1990-10-04
ES2033553T3 (es) 1993-03-16

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