EP0113837B1 - Dispositif de forage de trous disposés en nappe dans du roc - Google Patents

Dispositif de forage de trous disposés en nappe dans du roc Download PDF

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Publication number
EP0113837B1
EP0113837B1 EP19830111854 EP83111854A EP0113837B1 EP 0113837 B1 EP0113837 B1 EP 0113837B1 EP 19830111854 EP19830111854 EP 19830111854 EP 83111854 A EP83111854 A EP 83111854A EP 0113837 B1 EP0113837 B1 EP 0113837B1
Authority
EP
European Patent Office
Prior art keywords
hammer
valve
carriage
conduit
drill
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19830111854
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German (de)
English (en)
Other versions
EP0113837A1 (fr
Inventor
Friedrich Karl Dr. Ing. Arndt
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.)
Fried Krupp AG
Original Assignee
Fried Krupp AG
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Filing date
Publication date
Application filed by Fried Krupp AG filed Critical Fried Krupp AG
Publication of EP0113837A1 publication Critical patent/EP0113837A1/fr
Application granted granted Critical
Publication of EP0113837B1 publication Critical patent/EP0113837B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
    • B28D7/005—Devices for the automatic drive or the program control of the machines

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • Holes arranged on one level are driven into the rock to obtain marble slabs or blocks (so-called “ hole-to-hole drilling”).
  • the holes are spaced from one another in the range of 10 to 50 cm.
  • a device for drilling such holes, a device is known in which a plurality of rotary hammers arranged parallel to one another are movably guided in the longitudinal direction on a hammer slide guided on a carriage and are biased by spring elements in the direction of the tools against the hammer slide.
  • the invention has for its object to provide a device for drilling holes lying in one plane, with which substantially the same drilling or feed speeds can be achieved with the individual rotary hammers.
  • the depth of the boreholes is said to be substantially the same.
  • this object is achieved by the features characterized in claim 1.
  • a volume compensation is possible, through which the pressure in all cylinder chambers - and thus the pressure on the individual rotary hammers and drilling tools - is the same regardless of the individual axial displacement.
  • the invention is based on the idea that the same axial pressure on the drilling tools is an essential prerequisite for uniform drilling of all drilling tools.
  • the device In order to be able to compensate for constantly occurring individual differences in the drilling performance of one or individual rotary hammers, the device is designed according to claim 3. This design makes it possible to individually change the drilling performance supplied to the hammer drills.
  • the embodiment of the device according to FIG. 1 has three rotary hammers 1a, 1b, 1c, which are arranged axially parallel on a common hammer slide 2.
  • the rotary hammers 1 are each connected to a guide plate 3 which can slide in guide rails 4 fastened to the hammer slide 2.
  • the respective guide plate 3 is connected to the piston 6 of a cylinder 7 (7a, 7b, 7c) via the piston rod 5.
  • the actual cylinder body or the housing the cylinders 7 are articulated on the hammer carriage 2 at the same height.
  • the hammer drills 1 are axially movable relative to the hammer slide 2, their axial position corresponds to the position of the respective piston 6 (6a, 6b, 6c).
  • the highest and lowest position of the guide plates 3-with respect to the hammer slide 2- is indicated with dash-dotted lines.
  • the hammer carriage 2 has two times two guide plates 8, which are attacked by two strips 10 arranged on a carriage 9.
  • the carriage 9 can, for example, be attached to a boom (not shown) of a vehicle.
  • the hammer carriage 2 also has a connecting slide 11, which is integrated in a chain 12, which is deflected by an upper and lower sprocket 13 or 14 mounted in the carriage 9, the lower sprocket 14 as a drive wheel with a hydraulic motor 15 two current directions is connected.
  • the hydraulic motor 15 is connected to a pressure line P and a return line T. Both lines P and T are switched together by a 4/3-way valve 16 which can be actuated double electromagnetically.
  • the pressure line P also has a pressure limiting or safety valve 17.
  • the hammer carriage 2 can be moved up and down on the carriage 9.
  • Three position transducers 18, 19, 20 are over or on the mount. arranged one below the other, while a position transmitter 21 is attached to a tab 8 of the hammer slide 2. In the uppermost position of the hammer slide 2, the transmitter 21 faces the pickup 18 and in the lowest position the pickup 20.
  • the hammer drills 1 are each equipped with a drill rod 22 (22a, b, c) with a drill bit 23.
  • the drill rods 22 are centered and guided in a holder 24 arranged at the lower end of the mount.
  • the rotary hammers 1a to 1c and the cylinders 7a to 7c are symbolically represented - the rotary hammers 1a, etc. in the form of a cylinder with an impact piston 26a, 26b, 26c located therein.
  • the overhead cylinder chambers 7 'of the cylinders 7a to 7c are connected to one another via the line 27 and the connecting lines 28a, 28b, 28c.
  • the lower cylinder chambers 7 ′′ are connected to one another via the line 29 and the connecting lines 30a, 30b, 30c.
  • the lines 27 and 29 can be designed as a simple line connection (connection point) which detects the corresponding connecting lines (28a to 28c or 30a to 30c).
  • the upper cylinder chambers 7 'of the cylinders 7a and 7b through the line 27' and the connecting lines 28a, 28b 'and the upper cylinder chambers 7 "of the cylinders 7b, 7c through the line 27" and the connecting lines 28b “and 28c are connected.
  • the line connection for pressure and volume equalization between the cylinder chambers 7 'at the top of the cylinders 7a and 7c takes place via the aforementioned lines or connecting lines and the upper cylinder chamber 7' of the cylinder 7b.
  • the rotary hammers 1 a to 1 c are connected via a manifold 31 and in each case one feed line 32 a to 32 c to a pressure line P o which can be switched by an electrically actuated 2/2-way valve 33.
  • the feed lines 32a etc. each contain an adjustable throttling 34a, 34b, 34c and a flexible line connection 35a, 35b, 35c.
  • the upper cylinder chambers 7 'of the cylinders 7a to 7c are filled with a hydraulic medium.
  • the total feed force Fg transmitted from the chain 12 to the hammer carriage 2 is divided equally between the housings of the cylinders 7a to 7c articulated on the hammer carriage 2 and is transmitted from the cylinder housings via the hydraulic medium to the pistons 6 and from these via the piston rods 5 to the guide plates 3 and thus transferred to the rotary hammers 1 (1 a to 1 c).
  • the individual feed force F a , F b , F e exerted on the hammer drills 1 and thus on the drill rods 22 is Fg / 3 in the present exemplary embodiment.
  • the rotary hammers 1 and with them the pistons 6 of the cylinders 7 - with respect to the hammer slide 2 - are at the same height (dash-dotted line M-M in FIG. 5).
  • the drilling hammers 1 generally have different drilling speeds, as a result of which the drilling hammers 1 (and the pistons 6) execute an axial relative movement with respect to the hammer slide 2.
  • the individual displacement of the pistons 6 in the cylinders 7 leads to a change in volume in the upper and lower cylinder chambers 7 'and 7 ", which - in the embodiment according to FIG. 5 - through the lines 27 and 29 and the connecting lines 28a to 28c and 30a to 30c, the individual feed force on the individual hydraulic hammers 1 remains the same.
  • the transmitter 21 causes a pulse in the transducer 20, by means of which the 4/3-way valve 16 is switched into the blocking position shown in FIG. 1.
  • the feed force Fg is exerted on the hammer slide 2 and thus also the individual feed force F a etc. the individual hammer drills 1 interrupted.
  • the valve 33 in the pressure line P o is switched to the blocking position simultaneously or shortly thereafter, whereby the energy flow to the rotary hammers 1 is interrupted and the drilling work is ended.
  • the drilling tools 22, the associated rotary hammers 1 and the pistons 6 assume, for example, the position shown in FIG. 5, the drilling tool 22a having reached an average depth, while the drilling tool 22b has returned by the dimension s and the tool 22c the measure s has advanced.
  • a hammer drill 1 - regardless of the local nature of the rock - e.g. due to different line lengths, always drills faster than the other two rotary hammers, the drilling speed can be reduced by changing the corresponding throttle 34.
  • the hammer drill 1 is additionally provided with a Position transmitter 36 equipped, which cooperates with a position sensor 37 fastened to the hammer slide 2 (not shown there).
  • a position sensor 37 fastened to the hammer slide 2 (not shown there).
  • a bypass 38 with an expediently adjustable throttle element 40 is arranged parallel to the valve 39.
  • the magnet of the valve 39 is controlled by the position sensor 37.
  • the valve 39 and the bypass 38 with the throttle element 40 form a controller 41.
  • the switching arrangement described applies to all rotary hammers 1 a to 1 c.
  • the piston 6 moves downward from the line MM, ie in the feed direction of the drilling tool 22, so that the transmitter 36 detects the transducer 37 with its zone of action or influence and there generates a signal which is passed on ⁇ in the magnet of the valve 39 - causes the valve 39 to switch into the blocking position, as a result of which the flow through the valve 39 is interrupted.
  • the hydraulic hammer 1 is now again supplied with hydraulic medium and the full pressure p o .
  • the hydraulic hammers 1 and with them the boring bars 22 can be kept at essentially the same height within the scope of a predeterminable deviation.
  • a magnetically actuated 2/2-way valve 42a or 42b, 42c is built into the connecting line 28a to 28c to the connecting line 27.
  • the connecting line 27 is via a double magnetically actuatable 4/3-way valve 43 with a pressure line P 'and a return line (T) and the connecting line 29 via a 3/2-way valve 45 also with a pressure line P "and a return line (T) connected.
  • the rotary hammers 1 each have a position transmitter 47 (47a to 47c) which works with two position transducers 48 (48a to 48c) or 49 (49a to 49c) arranged one above the other on the hammer slide 2.
  • the position sensors 48 are each arranged at the same height at which the associated transmitter 47 is located when the pistons 6 are in their central position (line M-M).
  • the hammer slide 2 is initially in the uppermost position in which the position transmitter 21 faces the position sensor 18 (cf. FIG. 2).
  • the valves 42 and the valve 43 are each in the flow position I while the valve 45 is in the flow position II.
  • the cylinder chambers 7 'and 7 "of the cylinders 7 are thus each connected to the essentially pressure-free return line (T).
  • the pistons (6) loaded with the hydraulic hammers 1 are due to gravity - with their upper piston surfaces on the imaginary line NN - in the lowest position in the cylinders 7.
  • valve 45 is switched to the flow position I, in which the lower cylinder chambers 7 "are connected to the pressure line P".
  • the pistons 6 and with them the rotary hammers 1 are raised until the respective position transmitter 47 faces the associated upper position sensor 48 (in this position, the pistons 6 with their upper piston surface are on the imaginary line MM).
  • a signal is generated in the position sensor 48 that causes a switchover of the corresponding valve 42 into the blocking position II.
  • valve 43 is also switched to blocking position II.
  • the pistons 6 are hydraulically blocked and the hydraulic hammers 1 thus remain at the same height.
  • the valve 33 is first switched to the flow position 11, so that the rotary hammers 1 are connected to the pressure line P o and are thus supplied with impact and drilling energy. Irrespective of any unevenness in the surface and any locally fluctuating strength of the material to be drilled, the rotary hammers initially remain - hydraulically blocked - at the same height.
  • the signal generated in the sensor 20 causes the valve 16 to switch into the blocking position 11, so that the feed force Fg on the hammer slide 2 is canceled .
  • the valve 43 is switched to the flow position III, whereby the upper cylinder chambers 7 'are connected to the pressure line P'.
  • the hydraulic medium originating from this line and under pressure p ' acts in the upper cylinder chambers 7' on the piston surfaces of the pistons 6 and moves them - and thus the hydraulic hammers 1 - downward until the respective position transmitter 47 faces the corresponding position sensor 49 .
  • valve 33 When all hydraulic hammers 1 assume this position - line N'-N 'with respect to the drill bits 23 - the valve 33 is switched to the blocking position I on the basis of the signals from all three sensors 49a to 49c, and the drilling work of the drill hammers 1 is thus ended.
  • the valve 16 is switched to the through position I, whereby the hydraulic motor 15 is connected in the opposite way to the pressure line P.
  • the hydraulic motor 15 now rotates in the opposite direction and pulls the hammer carriage 2 back upwards (empty or return stroke).
  • the valve 16 In the uppermost position of the hammer slide 2, in which the transmitter 21 is opposite the pickup 18, the valve 16 is switched again to the blocking position II, as a result of which the hydraulic motor 15 is hydraulically blocked and the hammer slide 2 initially remains in its upper position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Earth Drilling (AREA)

Claims (7)

1. Dispositif comprenant un chariot à marteaux qui est guidé sur un affût et sur lequel plusieurs marteaux de forage disposés parallèlement sont guidés de manière à se déplacer dans le sens de leur axe longitudinal, caractérisé en ce que les marteaux de forage (1 = 1 a, 1 b, 1 c) sont reliés chacun par l'intermédiaire d'un vérin hydraulique (7=7a, 7b, 7c) au chariot marteaux (2) et en ce que, pour la transmission de la force de pression du chariot à marteaux (2) au marteau de forage correspondant (1 ), il y a, au moins entre la chambre cylindrique (7') de chaque vérin hydraulique (7) soumise à la pression et la chambre cylindrique (7') des autres vérins hydrauliques, une liaison par canalisations (27,28).
2. Dispositif selon la revendication 1, caractérisé en ce que les enveloppes des vérins hydrauliques (7) sont reliées au chariot à marteaux (2) et en ce que les marteaux de forage (1 ) sont reliés par l'intermédiaire de la tige de piston (5), au piston (6) des vérins hydrauliques correspondants.
3. Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce qu'à chaque marteau de forage (1) est associé, dans sa canalisation d'amenée (32) depuis la source de pression (Po), un dispositif d'étranglement particulier réglable (34=34a, 34b, 34c).
4. Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce qu'à chaque marteau de forage (1 ) est associé, dans sa canalisation d'amenée (32), une soupape d'arrêt (39) et en ce que parallèlement à la soupape d'arrêt (39), le dispositif comprend un by-pass (38) muni d'un dispositif d'étranglement (40), le positionnement de la soupape d'arrêt (39) dans sa position de fermeture étant déclenché par le fait que la position du marteau de forage (1 ) s'écarte dans le sens du forage de sa position moyenne (MM) par rapport au chariot à marteaux (2).
5. Dispositif selon la revendication 4, caractérisé en ce que la commutation de la soupape d'arrêt (39) est commandée par un détecteur de position (37) qui est fixé au chariot à marteaux (2) et qui, à son tour, est mis en action par un indicateur de position (36) relié au marteau de forage (2).
6. Dispositif selon l'une des revendications 1 à 3, caractérisé:
- en ce que le système de liaison par canalisations (27, 28) entre les chambres 7' des vérins hydrauliques (7) soumises à une pression pour la transmission de la force de compression du chariot à marteaux (2) aux marteaux de forage (1 ) comporte une canalisation de raccord (28=28a, 28b, 28c) qui peut être obstruée par une soupape d'arrêt (42=42a, 42b, 42c),
- en ce que toutes les canalisations de raccord (28) comportent dans une canalisation commune (27) une soupape (43) qui possède trois positions de commutation et qui établit une liaison entre la canalisation commune (27) et une source de pression (P') ou encore une canalisation de retour (T) ou isole la canalisation de raccord (28) de la source de pression (P') ou de la canalisation de retour (T),
- et en ce que les autres chambres (7") des vérins hydrauliques (7) sont reliées les unes aux autres par des canalisations de raccord (30=30a, 30b, 30c) et comportent dans une canalisation commune (29) une soupape (45) qui relie alternativement les canalisations de raccord (30) à une source de pression (P") ou à une canalisation de retour.
7. Dispositif selon la revendication 6, caractérisé:
- en ce qu'à un indicateur de position (21 ) relié au chariot à marteaux (2) sont associés trois détecteurs de position (18, 20,19) montés sur l'affût (9) dans une position supérieure, une position inférieure et une position intermédiaire,
- en ce que chaque marteau de forage (1) comporte un indicateur de position (47) auquel correspond un détecteur de position (48=48a, 48b, 48c) monté sur le chariot à marteaux (2), l'indicateur (47) et le détecteur (48) étant l'un en face de l'autre dans la position sensiblement médiane du marteau de forage (1 ) rapportée au chariot à marteaux (2),
- en ce que la soupape d'arrêt (42) associée aux premières canalisations de raccord (28) est commandée par le détecteur de position (48) monté sur le chariot à marteaux (2) pour se placer dans sa position de fermeture (II) et par le détecteur de position (19) monté entre les deux autres sur l'affût pour se placer dans sa position de passage (1),
- et en ce que la soupape (43) associée aux premières canalisations de raccord (28) est commandée par le détecteur de position (20), monté dans la position la plus basse sur l'affût (9), pour se placer dans sa position de passage (III) pour laquelle les canalisations de raccord (28) sont reliées à la source de pression (P').
EP19830111854 1982-12-16 1983-11-26 Dispositif de forage de trous disposés en nappe dans du roc Expired EP0113837B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823246591 DE3246591A1 (de) 1982-12-16 1982-12-16 Vorrichtung zum bohren von in einer ebene liegenden loechern in gestein
DE3246591 1982-12-16

Publications (2)

Publication Number Publication Date
EP0113837A1 EP0113837A1 (fr) 1984-07-25
EP0113837B1 true EP0113837B1 (fr) 1986-06-04

Family

ID=6180859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830111854 Expired EP0113837B1 (fr) 1982-12-16 1983-11-26 Dispositif de forage de trous disposés en nappe dans du roc

Country Status (3)

Country Link
EP (1) EP0113837B1 (fr)
DE (1) DE3246591A1 (fr)
FI (1) FI78159C (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI97419C (fi) * 1993-09-20 1996-12-10 Tamrock Oy Sovitelma kallionporakoneen syöttölaitteiston ohjaamiseksi
DE102008044352B4 (de) * 2008-12-04 2014-02-13 Hilti Aktiengesellschaft Mobile Bohrvorrichtung zum Erstellen von Mehrfachbohrungen in einem Bauteil

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE885985C (de) * 1949-03-08 1953-11-19 Ewald Zapp Grubenausbau mittels hydraulischer Stempel
US3080007A (en) * 1959-07-14 1963-03-05 Marmon Herrington Co Inc Roof drilling and bolting machine and wrench extension therefor
DE1202209B (de) * 1961-12-20 1965-09-30 Rigips Baustoffwerke G M B H Mehrspindelbohrautomat, insbesondere fuer Bauplatten
US3559631A (en) * 1968-07-12 1971-02-02 E & R Mfg Co Inc Hydraulic masonry cutting machine

Also Published As

Publication number Publication date
DE3246591A1 (de) 1984-06-20
FI834325A0 (fi) 1983-11-25
FI834325A (fi) 1984-06-17
EP0113837A1 (fr) 1984-07-25
FI78159B (fi) 1989-02-28
FI78159C (fi) 1989-06-12

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