EP0504106A1 - Dispositif pour la fracturation mécanique de roche, en particulier de blocs de roche dans les carrières, et procédé pour la production des surfaces des joues en forme de coin - Google Patents

Dispositif pour la fracturation mécanique de roche, en particulier de blocs de roche dans les carrières, et procédé pour la production des surfaces des joues en forme de coin Download PDF

Info

Publication number
EP0504106A1
EP0504106A1 EP92810151A EP92810151A EP0504106A1 EP 0504106 A1 EP0504106 A1 EP 0504106A1 EP 92810151 A EP92810151 A EP 92810151A EP 92810151 A EP92810151 A EP 92810151A EP 0504106 A1 EP0504106 A1 EP 0504106A1
Authority
EP
European Patent Office
Prior art keywords
wedge
jaws
tube
rod
piston
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.)
Withdrawn
Application number
EP92810151A
Other languages
German (de)
English (en)
Inventor
Thomas Brönnimann
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.)
Bieri Hydraulik AG
Original Assignee
Bieri Hydraulik AG
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 Bieri Hydraulik AG filed Critical Bieri Hydraulik AG
Publication of EP0504106A1 publication Critical patent/EP0504106A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C37/00—Other methods or devices for dislodging with or without loading
    • E21C37/04—Other methods or devices for dislodging with or without loading by devices with parts pressed mechanically against the wall of a borehole or a slit

Definitions

  • the invention relates to a device for the mechanical cutting of rock, in particular blocks of stone in quarries, and a method for producing the wedge surfaces of the jaws.
  • Such devices are known.
  • devices which are provided with a housing tube, in the inner cavity of which a longitudinal wedge is arranged to be axially displaceable.
  • elongated openings are usually arranged in pairs, in which jaws are inserted.
  • These jaws are supported against longitudinal displacement and guided in a radially movable manner.
  • On the inside, these jaws have flat wedge surfaces which rest on the correspondingly shaped surfaces of the wedge.
  • a number of holes are drilled in the stone blocks to be cut, into which the housing tube of this device is inserted.
  • the jaws are in the retracted position. Then the jaws are moved radially outwards by longitudinally moving the wedge. The stone block is cut up.
  • this type of device can be equipped with a very long housing tube, in which the jaws are arranged on its front area, which is inserted into the hole, so that their use would also be possible in deep bores.
  • this embodiment requires drilling in the stone blocks, which have a relatively large diameter. Since the drilling of deep holes with a relatively large diameter in the stone blocks is very complex, such devices are mostly used only in relatively short holes.
  • CH-PS 497 962 Another device for splitting stone blocks is shown in CH-PS 497 962.
  • the working part of this device essentially consists of an internal longitudinal wedge on which two external counter wedges or jaws rest.
  • the drive for longitudinally displacing the longitudinal wedge which in this case consists of a spindle driven by an air motor, is accommodated in a cylindrical housing.
  • the drive can also be designed as a hydraulic piston-cylinder unit.
  • the jaws are connected to the cylindrical housing at their cylinder-side end by means of a hammer-shaped head in a corresponding holder so as to be transversely displaceable. When the longitudinal wedge is pushed forward to cut stone, the jaws are subjected to longitudinal tension.
  • the known devices described are furthermore suitable for only one borehole depth and for only one diameter of a borehole and consequently cannot be used in many different ways.
  • the object of the invention is to create a device for cutting stone blocks, with which it is possible to exert a transverse force in deep, small-diameter boreholes in stone blocks and thus to obtain an exact cutting of the stone blocks.
  • the length of the jaws and the wedge should be simple and quick Replacing these parts can be adapted to the different application depths or different borehole diameters.
  • the wedge shape on the rod is advantageously designed such that the outward transverse movement of the jaws takes place by a longitudinal pulling movement on the rod. This ensures that the material distribution in the cross-section of the jaws is optimal.
  • the jaws thicken in the right sense, namely towards the cylinder side, in the same way that the stress increases.
  • the wedge of the rod is robust because it thickens outwards from the cross section of the rod. This means that the work unit can also be fully inserted into the hole in the stone block. The wedge of the rod is pulled into the tube, damage to the wedge during the cutting process is excluded.
  • An optimal shape of the wedge surfaces of the wedge is achieved if they have a semi-cylindrical convex shape, the radius of curvature of which is approximately half Corresponds to the diameter of the rod.
  • the corresponding wedge surfaces of the jaws on which the wedge rests are equally concave. Their radius of curvature corresponds to half the inner diameter of the tube. This design of the wedge surfaces results in an optimal contact in every position passed by the wedge during the process.
  • the tube is held in the cylinder housing by two pin-shaped holders which are connected to each other by a spring and which can be easily pulled out to replace the tube.
  • the upper end of the rod is passed through the hollow piston of the cylinder-piston unit and held at the rear of the piston rod with a screw connection.
  • the retaining nut is advantageously rotatably attached to the piston rod so that the retaining nut cannot fall out.
  • the hydraulic cylinder-piston unit 1 consists of a cylinder housing 2 and a hollow piston 3, which can be displaced longitudinally therein, with a double-sided piston rod 4a, 4b and different piston surfaces 5a or 5b on the working or return side of the piston 3.
  • connections 6, 7 for hydraulic lines are attached, which are connected to a hydraulic unit, not shown.
  • the upper end 8 of the cylinder housing 2 is provided with an annular handle 9.
  • the cylinder housing 2 is equipped at its lower end 10 with an end cover 11 which is screwed coaxially into the cylinder housing 2 and which has an opening 12 for receiving the piston rod 4b.
  • the end cover 11 has at its extended end facing away from the cylinder housing 2 a coaxial bore 13 into which the tube 14 can be inserted.
  • the end face of the tube 14 lies against the web 16 arranged in the end cover 11.
  • connection between the end cover 11 of the cylinder housing 2 and the pipe 14 which can be inserted into the coaxial bore 13 consists of two parallel bolts 17 and 18 which can be inserted into corresponding through openings in the end cover 11.
  • the through openings are arranged such that the bolts 17 and 18 inserted therein protrude into recesses 19 and 20 on both sides of the tube 14, as can also be seen in FIG. 5, whereby the tube 14 is held against being pushed out of the coaxial bore 13 .
  • 5 also shows that the two bolts 17 and 18 are connected to one another via a spring element 21.
  • the spring element 21 is slightly tensioned when the bolts 17 and 18 are inserted in the corresponding through openings, as a result of which the bolts 17 and 18 are held in the through openings in a self-locking manner.
  • a rod 22 is guided through the central opening of the hollow piston 3 and is provided with a thread 23 at its end, as can be seen in FIGS. 1 a and 4.
  • a hat nut 24 can be screwed onto this thread 23.
  • the holding nut 24 is rotatably held at the outer end of the piston rod 4a.
  • the holding nut 24 has a circumferential groove 25.
  • the retaining nut 24 can be inserted from the side into a U-shaped recess 26 in the piston rod 4a.
  • the U-shaped recess 26 is provided with a web 27, in which the groove 25 of the retaining nut 24 comes to rest.
  • the holding nut 24 lies with its end face 28 on a corresponding counter surface 29 of the piston rod 4a.
  • the holding nut 24 is thereby connected to the piston rod 4a in such a way that it can transmit pulling and pushing movements of the hollow piston 3 to the rod 22.
  • a locking screw 30 is attached to prevent the retaining nut 24 from falling out of the U-shaped recess 26 of the piston rod 4a when the rod 22 is not screwed in.
  • a torsion bar 31 is inserted and held centrally in a corresponding opening transversely to the threaded hole.
  • the thread 23 of the rod 22 it is necessary for the thread 23 of the rod 22 to be screwed into the retaining nut 24 over its entire length. This is achieved when the thread 23 rests with its end face on the torsion bar 31 of the retaining nut 24.
  • a continuous opening 32 is provided in the holding nut 24 transversely to the threaded hole in the area of the torsion bar 31.
  • both the area of the torsion bar 31, which serves as a stop for the end face of the thread 23, and the upper part of the thread 23 are visible, so that a visual check of the screwing depth of the thread 23 in the retaining nut 24 is possible.
  • the continuation of the tube 14 and the rod 22 is shown in Fig. 1b.
  • the rod 22 lies in the inner opening of the tube 14.
  • the tube 14 has at its end facing away from the cylinder-piston unit 1 an area 33 which has a slightly larger diameter than the rest of the tube 14.
  • the length of this area 33 corresponds approximately the length of the wedge-shaped surfaces 34 and 35 attached to the inside of the tube 14.
  • Two symmetrically arranged, opposing longitudinal slots 36, 37 are made in the tube 14 from its end facing away from the cylinder-piston unit 1, that go beyond area 33 to some extent. These two longitudinal slots 36 and 37 divide the tube 14 into two shells 38 and 39 which form the jaws 40, 41 in the area 33 of the tube 14.
  • the wedge-shaped surfaces 34 and 35 which are attached to the inside of the jaws 40 and 41, have a constant radius of curvature R over their entire length, as can be seen from FIGS. 2a to 2c, and include the wedge angle ⁇ .
  • the rod 22 is also provided with wedge-shaped surfaces 42 and 43 which are longer by approximately the stroke length of the lifting piston 3 than the wedge-shaped surfaces 34 and 35, as can also be seen from FIG. 3 is.
  • the wedge-shaped surfaces 34 and 35 of the tube 14 and the wedge-shaped surfaces 42 and 43 of the rod 22 have corresponding shapes, ie matching radii of curvature R.
  • the rod 22 In the starting position, i.e. when the cutting device is to be inserted into the borehole in the stone block, the rod 22 is in the extended position, as shown in Figs. 1a and 1b.
  • the working tool tube 14 and rod 22 is inserted into the borehole.
  • the rod 22 is then pulled back into the tube 14 by the hollow piston 3 by means of hydraulic pressure.
  • the jaws 40 and 41 are pressed apart by the wedge action of the wedge-shaped surfaces 42 and 43 of the rod 22.
  • the two shells 38 and 39 of the tube 14 deform elastically, i.e. they spring apart.
  • the stone block is broken, the rod 22 is pushed forward again, the jaws 40 and 41 spring back into the original position, the device is ready for a new operation.
  • Tube 14 and rod 22 on the cylinder-piston unit 1 can be easily replaced with new ones if they show excessive wear.
  • Tube 14 and rod 22 can also be easily replaced by those which have a different length or a different diameter, as a result of which an optimal adaptation to the borehole depth or borehole diameter in the stone block is made possible, and this ensures a versatile application of the device.
  • the tube 14 is produced by arranging symmetrically on the tube 14, which has an inner diameter that is constant over its entire length, and that has at one end a region 33 that has a slightly larger diameter than the remaining tube 14.
  • opposite longitudinal slots 36, 37 are attached. These longitudinal slots 36, 37 are open towards the end of the tube 14 in the area 33 and extend beyond the area 33 forming the jaws 40, 41.
  • a piece of pipe is pushed over the pipe 14 from the other end of the pipe 14 until it abuts the edge of the area 33.
  • the two jaws 40, 41 are spread symmetrically from the end and bent around the end of the pipe section until the angle which the two bent jaws 40, 41 enclose corresponds to the wedge angle ⁇ .
  • the two jaws 40, 41 maintain the position specified in this way.
  • the outside of the jaws 40, 41 spread out in this way is then turned over to the original circular dimension, which the area 33 had previously.
  • the desired inner wedge-shaped surfaces 34, 35 are obtained, which have the desired radius of curvature R over the entire length, without having to carry out processing steps on the inside.
EP92810151A 1991-03-13 1992-03-02 Dispositif pour la fracturation mécanique de roche, en particulier de blocs de roche dans les carrières, et procédé pour la production des surfaces des joues en forme de coin Withdrawn EP0504106A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH75691 1991-03-13
CH756/91 1991-03-13

Publications (1)

Publication Number Publication Date
EP0504106A1 true EP0504106A1 (fr) 1992-09-16

Family

ID=4194457

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92810151A Withdrawn EP0504106A1 (fr) 1991-03-13 1992-03-02 Dispositif pour la fracturation mécanique de roche, en particulier de blocs de roche dans les carrières, et procédé pour la production des surfaces des joues en forme de coin

Country Status (1)

Country Link
EP (1) EP0504106A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109356586A (zh) * 2018-12-14 2019-02-19 新乡市威达机械有限公司 钻孔和起煤一体的高效整煤开采装置及其使用方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH486299A (de) * 1966-12-08 1970-02-28 Darda Helmut Hydraulisch betätigtes Gerät zum mechanischen Zerlegen von Gestein
CH497962A (de) * 1968-03-07 1970-10-31 Demag Ag Steinspaltgerät
US4152028A (en) * 1978-02-24 1979-05-01 The United States Of America As Represented By The United States Department Of Energy Expansible apparatus for removing the surface layer from a concrete object
DE3131639A1 (de) * 1981-08-11 1983-03-03 H. Bieri AG Maschinenfabrik, 3097 Liebefeld, Bern "hydraulisches spaltgeraet"
US4571002A (en) * 1984-05-10 1986-02-18 Kabushiki Kaisha Komatsu Seisakusho Hydraulic rock splitter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH486299A (de) * 1966-12-08 1970-02-28 Darda Helmut Hydraulisch betätigtes Gerät zum mechanischen Zerlegen von Gestein
CH497962A (de) * 1968-03-07 1970-10-31 Demag Ag Steinspaltgerät
US4152028A (en) * 1978-02-24 1979-05-01 The United States Of America As Represented By The United States Department Of Energy Expansible apparatus for removing the surface layer from a concrete object
DE3131639A1 (de) * 1981-08-11 1983-03-03 H. Bieri AG Maschinenfabrik, 3097 Liebefeld, Bern "hydraulisches spaltgeraet"
US4571002A (en) * 1984-05-10 1986-02-18 Kabushiki Kaisha Komatsu Seisakusho Hydraulic rock splitter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109356586A (zh) * 2018-12-14 2019-02-19 新乡市威达机械有限公司 钻孔和起煤一体的高效整煤开采装置及其使用方法
CN109356586B (zh) * 2018-12-14 2023-08-15 新乡市威达机械有限公司 钻孔和起煤一体的高效整煤开采装置及其使用方法

Similar Documents

Publication Publication Date Title
CH655892A5 (de) Bohrhammer mit fuehrungszylinder fuer das schlagwerk.
DE2056091C3 (de) Spitzbohrwerkzeug
DE2928555A1 (de) Bohrwerkzeug
DE69923362T2 (de) Werkzeug zur spanabhebenden Bearbeitung
DE3241746A1 (de) Vorrichtung zum kuppeln einer bohrstange fuer schachtofenabstichloecher mit dem arbeitswerkzeug einer bohrmaschine
DE19748987A1 (de) Bohrwerkzeug insbesondere für drehschlagendes Bohren von vorzugsweise Gestein
DE3151275A1 (de) Befestigungsvorrichtung fuer werkzeuge
DE1652483B1 (de) Hydraulisch betaetigtes Geraet zum mechanischen Zerlegen von Gestein
EP0504106A1 (fr) Dispositif pour la fracturation mécanique de roche, en particulier de blocs de roche dans les carrières, et procédé pour la production des surfaces des joues en forme de coin
DE3131639C2 (de) Hydraulisches Spaltgerät
LU85612A1 (fr) Greifvorrichtung fuer in das stichloch von metallurgischen ofen eintreibbare und aus diesem herausziehbare stangen,insbesondere abstichstangen
DE1552611B2 (de) Lochstanze
DE4121674C1 (fr)
DE341429C (de) Werkzeug zur genauen Profilierung von Duebelloechern
DE2638243A1 (de) Honwerkzeug
DE3406454C2 (fr)
DE2239328C3 (de) Honwerkzeug
DE2117471A1 (de) Verfahren und Vorrichtung zum Befestigen von Anschlußteilen an Bauelementen
DE1477862A1 (de) Bohrwerkzeug
DE1652483C (de) Hydraulisch betätigtes Gerat zum me chanischen Zerlegen von Gestein
DE1602698C (de) Werkzeugfutter
DE10041149B4 (de) Axialführung für rotierend angetriebene Werkzeuge, insbesondere Bohrwerkzeuge
DE7808006U1 (de) Holzbohrer
DE2404441C3 (de) Kompressionsnagel für Knochenbrüche und Werkzeuge zur Handhabung desselben
DE670959C (de) Fangvorrichtung fuer den Tiefbohrbetrieb

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE ES FR IT LI PT

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19930317