EP0047944A1 - Perforatrice à percussion - Google Patents

Perforatrice à percussion Download PDF

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Publication number
EP0047944A1
EP0047944A1 EP81106994A EP81106994A EP0047944A1 EP 0047944 A1 EP0047944 A1 EP 0047944A1 EP 81106994 A EP81106994 A EP 81106994A EP 81106994 A EP81106994 A EP 81106994A EP 0047944 A1 EP0047944 A1 EP 0047944A1
Authority
EP
European Patent Office
Prior art keywords
valve
impact
piston
percussion piston
drilling device
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
EP81106994A
Other languages
German (de)
English (en)
Other versions
EP0047944B1 (fr
Inventor
Alfred Paikert
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT81106994T priority Critical patent/ATE10871T1/de
Publication of EP0047944A1 publication Critical patent/EP0047944A1/fr
Application granted granted Critical
Publication of EP0047944B1 publication Critical patent/EP0047944B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/145—Control devices for the reciprocating piston for hydraulically actuated hammers having an accumulator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/12—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • 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
    • E21B6/00—Drives for drilling with combined rotary and percussive action
    • E21B6/06—Drives for drilling with combined rotary and percussive action the rotation being intermittent, e.g. obtained by ratchet device

Definitions

  • the invention relates to a hammering and drilling device which is operated by means of hydraulic fluid, in particular water under high pressure, and which has an outer, stationary part provided at the rear with a hydraulic fluid supply line and an inner, movable part carrying a hammering and drilling tool at the front end a main control valve for the hydraulic control of an oscillating movement of the movable part designed as a percussion piston and with a pilot spool controlled by the oscillating movement of the percussion piston for the hydraulic control of the main control valve, recoil nozzles or a linkage for the propulsion being arranged at the rear end of the stationary part.
  • Such a striking and drilling device is known from D E-PS 22 57 753.
  • the reciprocating movement of the pilot spool is carried out mechanically as a result of the swinging movement of the percussion piston, while the control of the main control valve by the pilot spool done hydraulically.
  • the pilot spool With every change of direction of the percussion piston there is an impact on the pilot spool, which reduces the usable force of the percussion piston.
  • the respective impact results in a particularly safe function of the pilot spool, since the oscillating movement takes place with great certainty even when the pressure fluid is dirty and the pilot spool is correspondingly difficult to operate.
  • the solution to this problem is that the pilot valve and the percussion piston form a control chamber with a pressure shoulder on the pilot valve, and that a displacement of the percussion piston opens a control bore serving to pressurize the control chamber and closes a venting bore through control edges or closes at one opposite displacement closes and opens.
  • the pilot valve is therefore no longer displaced by a mechanical impact of the percussion piston on the pilot valve, but the pilot valve is displaced on the basis of hydraulic forces, in a manner similar to the movement of the main control valve from the movement of the Pilot valve causes. Because of the lack of impact, the full impact force of the percussion piston is available to the outside, so that the performance of the device according to the invention compared to the known device is significantly increased.
  • the device according to the invention uses known practices for cleaning pipes and ducts with the aid of an impact and drilling tool at the front end of the device, the effect of which can be supported by the escape of liquid under high pressure and its drive with the aid of a rod or with the help of recoil nozzles at the rear end of the device.
  • the percussion piston, the pilot spool and the main control valve are nested, that is to say arranged essentially concentrically to one another, and the percussion piston is designed in a manner known per se as a differential piston. Its smaller piston area is continuously pressurized, while the larger piston area is alternately pressurized and vented.
  • the pilot spool is subjected to a similar, leading hydraulic effect, in which the resul Acting forces a shift of the pilot spool in one direction and the alternating pressurization and venting of an additionally created shoulder causes a temporary shift of the pilot spool in the other direction.
  • the movements of the pilot spool cause the main control valve to oscillate between two end positions, the end positions each leading to the opening of one valve and the closing of another valve which are followed by hydraulic paths which lead to pressurization or ventilation of the larger piston area of the differential piston.
  • the latter valves are formed, for example, by a radially outward extension on the main control valve, so that in view of the relatively large diameter with small movements of the main control valve, relatively large valve cross sections are created, which allow unimpeded access of the pressure fluid to the differential piston and a correspondingly rapid discharge ensure during ventilation.
  • the impact piston which is identical to the differential piston, produces a particularly powerful impact.
  • the device according to the invention is provided with a device which, from the oscillating movement of the percussion piston, forces the piston to rotate about its longitudinal axis.
  • the resulting rotary movement takes place step-by-step, supporting members being used under frictional engagement which slip when the rotary movement is impeded, so that damage to the device causing the rotary movement is virtually impossible.
  • a housing cover 1 with a hydraulic fluid supply line 2 or 2 ' is fastened, while on the other side the percussion piston 10 provided with a tool holder protrudes.
  • a pilot spool 50 is shifted and thus a main control valve 7-n is actuated on the basis of hydraulic forces, which is described in detail below:
  • liquid 3 is supplied to a space under high pressure, which liquid escapes in part via recoil nozzles 4 and is used as a recoil jet 5 to propel the device. Deviating from this, the propulsion can also take place through a linkage through which the liquid is then expediently fed to the device under high pressure.
  • the majority of the pressure fluid passes through an opening 6 in the main control valve 7 and through one or more bores 8 in an insert 9 into the inner cross section of the percussion piston 10, which is large as a blind bore, and via openings 11 into a cylinder space 12 which passes through the cylinder tube 13 and is limited backwards by a seal 15 on the percussion piston 10; a further seal 14 mounted in the guide ring 54 prevents the pressurized liquid from escaping at this point.
  • the space 12 is constantly pressurized by the liquid, so it is under high pressure.
  • a further part of the liquid under pressure is fed via channels 16 and 17 to a drilling tool 18 and 19, from which the liquid emerges at high speed for washing and cutting purposes.
  • the percussion piston has run over and opened a control bore 21 with a control edge 20 during an oscillating movement directed in the direction of arrow 22, a control edge 23 having closed a ventilation bore 24.
  • a pressure shoulder 25 is pressurized on the pilot spool 50, causing the pilot spool 50 to the left (in arrow direction 22) is shifted because the forces acting on it to the left from the hydraulic loading of surfaces 25, 26 and 27 are greater overall than the forces acting to the right from a piston surface 28.
  • the decisive pressure shoulder 25 is located within a control chamber 21 ' which, as shown, can be pressurized or vented.
  • the main control valve 7 is constantly acted upon by the pressure of the liquid with an end face 60, while a space 29 is constantly vented via vent holes 30, 31 and 32 and is therefore depressurized.
  • a space 33 is also constantly vented via bores 34, a space 35, a channel 36, an annular space 37 and openings 38 and is therefore depressurized.
  • a space 39 is continuously vented via bores 31 and 32 and thus depressurized.
  • a control bore 40 is connected to the space 39, whereby a space 41 is depressurized, and the main control valve 7 is shifted so far to the left by the pressure on the surface 60 that valve surfaces 42 and 43 lie one on top of the other and the passage of the bottom Pressurized liquid from the opening 6 through a bore 44 into a cylinder space 45 is interrupted.
  • a passage is created between valve surfaces 46 and 47 and the cylinder space 45 is thereby connected to the environment via the channels 34 to 38 and is therefore depressurized.
  • the pilot spool 50 remains in its position under the influence of the hydraulic forces acting on it on the surfaces 25, 27 and 28 and on the end face 60 of the main control valve 7 until the control edge 20 of the percussion piston has passed over the control bore 21 and closed again , at the same time the vent hole 24 is run over by the control edge 23 and opened.
  • the resulting relief of the pressure shoulder 25 and as a result of the pressure shoulder 26 already relieved in a cylinder space 45 now exceeds the hydraulic force acting on the pilot valve 50 on the surface 28 and the opposing forces on the surfaces 27 and 60, so that the pilot valve 50 follows moved to the right until it strikes the boundary of room 39.
  • the control bore 40 is thereby connected to a bore 51 and the cylinder chamber 41 is pressurized with hydraulic fluid.
  • the force acting on the main control valve 7 in this cylinder space 41 now exceeds the force acting on it in opposition to it as a result of the surface 60, so that the main control valve 7 moves to the right until the valve surfaces 46 and 41 abut one another and thus close the outlet from the cylinder space 45 .
  • This cylinder space 45 is now filled again with hydraulic fluid via the annular gap formed between the valve surfaces 42 and 43.
  • a compression spring 61 holds the main control valve 7 in a position in which the valve surfaces 46 and 47 abut one another. This prevents valve displacement during transport, i.e. outside of the company. It ensures that the starting position is always ready for operation; the spring 61 has no function during operation.
  • FIG. 2 another embodiment of the impact and drilling device according to the invention is shown, which differs from the embodiment described above in that the pilot spool 50 is moved auxiliary due to mechanical action due to the swinging movement of the percussion piston 10 when the hydraulic, which is usually active Reversal fails.
  • an end face 62 on the percussion piston 10 is flat in itself, so that it can interact with the end face 28 of the pilot valve 50.
  • the further baffle pairing consists of the pressure shoulder 25, which is carried along by the control edge 23 if the hydraulic reversal fails, which leads to an oscillating movement of the pilot spool 50.
  • both exemplary embodiments do not differ from one another.
  • the insert 9 is guided and adjustable in length by means of a thread in the pilot valve 50, as a result of which the free passage cross section can be set on the valve surfaces 42 and 43.
  • Both embodiments are also a device for forced rotation from the oscillating movement of the percussion piston 10 together, which is only shown in FIG. 1 is shown. It comprises two opposing members 55 and 56, the axis of rotation of which extends radially and which are rotatably mounted in the wall of the percussion piston 10.
  • a cantilever is arranged at its respective outer end, which projects in the circumferential direction from the central axis of the respective links 55 and 56.
  • an extension with a double wedge surface points once in the direction of the drilling tool 18 (link 55) and in the direction of the feed line 2 (link 56).
  • the double wedge surfaces dip into a keyway 58 and 59 and are each biased by means of a spring 57 so that they form a frictional engagement with the keyway 58 or 59 before reaching the end position of the percussion piston 10, that is to say a support point.
  • the further movement of the percussion piston 10 causes each link 55 or 56 to perform a rotary movement around the point of frictional engagement, so that the central axis of each link 55 or 56 performs a circular movement with respect to the point of frictional engagement.
  • the impact and drilling device according to the invention is held approximately in the middle of the tool, the device can be placed on a slide, the runners of which can be adjusted over a wide range and can thus be adapted to different diameters.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Earth Drilling (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP81106994A 1980-09-11 1981-09-07 Perforatrice à percussion Expired EP0047944B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81106994T ATE10871T1 (de) 1980-09-11 1981-09-07 Schlag- und bohrvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3034211A DE3034211C2 (de) 1980-09-11 1980-09-11 Mit einer Druckflüssigkeit beaufschlagbare Schlag- und Bohrvorrichtung
DE3034211 1980-09-11

Publications (2)

Publication Number Publication Date
EP0047944A1 true EP0047944A1 (fr) 1982-03-24
EP0047944B1 EP0047944B1 (fr) 1984-12-19

Family

ID=6111680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81106994A Expired EP0047944B1 (fr) 1980-09-11 1981-09-07 Perforatrice à percussion

Country Status (3)

Country Link
EP (1) EP0047944B1 (fr)
AT (1) ATE10871T1 (fr)
DE (2) DE3034211C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0149676A1 (fr) * 1983-05-13 1985-07-31 Landmark West Ltd Perforatrice permettant de percer la roche
EP0171374A1 (fr) * 1984-06-25 1986-02-12 Atlas Copco Aktiebolag Perforatrice à percussion hydraulique située dans la forure
CN102817555A (zh) * 2012-08-31 2012-12-12 涂文斌 水能冲击器

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4131070C2 (de) * 1991-09-18 1993-11-18 Ingenieurkontor Fuer Maschinen Hydraulisch getriebener Schlagbohrhammer
CN102168523B (zh) * 2011-04-27 2013-03-20 兰桥昌 钻机的主传动和变速系统及其操纵机构
CN113236156B (zh) * 2021-04-19 2022-12-13 中煤科工集团淮北爆破技术研究院有限公司 基于转向阀的孔内增压器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2257753A1 (de) * 1972-11-24 1974-06-06 Haerke Ag Georg Mittels einer druckfluessigkeit betriebene schlag- und bohrduese
DE2536143A1 (de) * 1975-08-13 1977-02-17 Inst Gornogo Dela Sibirskogo O Hydraulische schlagmaschine
DE2804388A1 (de) * 1977-02-04 1978-08-10 Chicago Pneumatic Tool Co Hydraulischer gesteinsbohrer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2425046A1 (de) * 1974-05-24 1975-12-04 Demag Drucklufttechnik Gmbh Hydraulische vorrichtung zur steuerung des kolbenhubes bei einem translatorisch bewegten arbeitsgeraet, insbesondere einer ramme oder einem pfahlzieher
US4072198A (en) * 1976-04-30 1978-02-07 Chicago Pneumatic Tool Company Hydraulic rock drill

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2257753A1 (de) * 1972-11-24 1974-06-06 Haerke Ag Georg Mittels einer druckfluessigkeit betriebene schlag- und bohrduese
DE2536143A1 (de) * 1975-08-13 1977-02-17 Inst Gornogo Dela Sibirskogo O Hydraulische schlagmaschine
DE2804388A1 (de) * 1977-02-04 1978-08-10 Chicago Pneumatic Tool Co Hydraulischer gesteinsbohrer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0149676A1 (fr) * 1983-05-13 1985-07-31 Landmark West Ltd Perforatrice permettant de percer la roche
EP0149676A4 (fr) * 1983-05-13 1985-09-02 Landmark West Ltd Perforatrice permettant de percer la roche.
EP0171374A1 (fr) * 1984-06-25 1986-02-12 Atlas Copco Aktiebolag Perforatrice à percussion hydraulique située dans la forure
CN102817555A (zh) * 2012-08-31 2012-12-12 涂文斌 水能冲击器

Also Published As

Publication number Publication date
DE3167834D1 (en) 1985-01-31
EP0047944B1 (fr) 1984-12-19
DE3034211A1 (de) 1982-03-25
ATE10871T1 (de) 1985-01-15
DE3034211C2 (de) 1983-03-17

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