EP0047944B1 - Perforatrice à percussion - Google Patents

Perforatrice à percussion Download PDF

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Publication number
EP0047944B1
EP0047944B1 EP81106994A EP81106994A EP0047944B1 EP 0047944 B1 EP0047944 B1 EP 0047944B1 EP 81106994 A EP81106994 A EP 81106994A EP 81106994 A EP81106994 A EP 81106994A EP 0047944 B1 EP0047944 B1 EP 0047944B1
Authority
EP
European Patent Office
Prior art keywords
valve
pilot valve
impact
percussion piston
control
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
EP81106994A
Other languages
German (de)
English (en)
Other versions
EP0047944A1 (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
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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 DE-PS 22 57 753.
  • the reciprocating movement of the pilot spool is carried out mechanically as a result of the oscillating movement of the percussion piston, while the control of the main control valve is carried out hydraulically by the pilot spool.
  • 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.
  • control spool is therefore no longer displaced by a mechanical impact of the percussion piston on the pilot spool, but the displacement of the pilot spool is carried out on the basis of hydraulic forces. 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 is significantly increased compared to the known device.
  • the device according to the invention makes use of 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 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 essentially concentrically with one another in a manner known per se, and the percussion piston is designed as a differential piston.
  • the small piston area is continuously pressurized, while the larger piston area is alternately pressurized and vented.
  • the pilot spool is subjected to a similar, preliminary hydraulic effect, in which the resulting forces initially shift the pilot spool in one direction and the alternating pressurization and venting of an additional shoulder creates a temporary displacement 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 result in pressurization or venting of the larger piston area of the differential piston.
  • the device according to the invention is provided with a device which, from the oscillating movement of the percussion piston, forces a known rotary movement of the piston about its longitudinal axis.
  • the resulting rotary movement takes place step-by-step, with 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.
  • 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 interior of the percussion piston 10, which opening is large as a blind bore, and via openings 11 into a cylinder space 12 which passes through the cylinder barrel 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 pressure fluid 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.
  • pressures of 40-300 bar are used at a volume flow of approximately 100-500 liters per minute, with conventional sewer cleaning vehicles being used to generate these pressures and these flows.
  • the percussion piston has run over and opened a control bore 21 with a control edge 20 during an oscillating movement in the direction of arrow 22, a control edge 23 having closed a vent bore 24.
  • a pressure shoulder 25 is pressurized on the pilot spool 50, as a result of which the pilot spool 50 is shifted to the left (in the direction of arrow 22), because the forces acting on it to the left from the hydraulic loading of surfaces 25, 26 and 27 are greater overall than those after right-hand force 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 continuously 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 constantly vented through the bores 31 and 32 and is therefore 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 as a result the cylinder space 45 is connected to the environment via the channels 34 to 38 and is therefore depressurized.
  • the pilot spool 50 remains under the influence of the hydrau acting on it Lical forces on the surfaces 25, 27 and 28 and on the end face 60 of the main control valve 7 in its position until the control edge 20 of the percussion piston has passed over the control bore 21 and closed again, the vent bore 24 being run over by the control edge 23 and at the same time is 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.
  • 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.
  • the two 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 cross section on the valve surfaces 42 and 43 can be set.
  • the two exemplary embodiments also have in common a device for forced rotation from the oscillating movement of the percussion piston 10, which is only shown in FIG. 1. 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 dive into a keyway 58 and 59 and are each biased with the aid 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 about 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.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (11)

1. Perceuse à percussion qui fonctionne au moyen d'un fluide sous pression, en particulier avec de l'eau sous haute pression, et qui présente une partie extérieure fixe arrière (1, 53) munie d'une arrivée de fluide sous pression (2, 2') ainsi qu'une partie intérieure mobile (10) portant, à son extrémité avant, un outil de perçage à percussion (18, 19), avec une vanne-pilote principale (7) pour la commande hydraulique d'un mouvement oscillatoire de la partie mobile-conformée en piston frappeur (10) et avec une soupape-pilote (50) commandée à son tour par le mouvement oscillatoire du piston frappeur (10) et assurant la commande hydraulique de la vanne-pilote principale (7), des tuyères à réaction (4) ou une tringlerie pour le creusement étant disposées à l'extrémité arrière de la partie fixe (1, 53), caractérisée en ce que, dans la région d'un épaulement sur le piston frappeur (10), la soupape-pilote (50) et le piston frappeur (10) s'insèrent l'un dans l'autre et forment une chambre de commande (21'), qu'à l'intérieur de la chambre de commande (21') un épaulement de pression (25) est ménagé sur la soupape-pilote et qu'un déplacement du piston frappeur (10) entraîne l'ouverture d'un orifice de commande (21) disposé radialement dans la soupape-pilote (50) et servant à l'alimentation de la chambre de commande (21') en fluide sous pression et la fermeture d'un orifice de mise à l'atmosphère (24) ou la fermeture et l'ouverture dans le cas d'un déplacement en sens inverse.
2. Perceuse à percussion selon la revendication 1, caractérisée en ce que le piston frappeur (10) est conforme, d'une manière bien connue en soi, en piston différentiel, que la vanne-pilote principale (7) peut coulisser à l'intérieur de la soupape-pilote (50) et que la surface la plus grande du piston différentiel est soumise à la pression ou à la mise à l'atmosphère par des soupapes (42, 43 ; 46, 47) actionnées par le déplacement de la vanne-pilote principale (7).
3. Perceuse à percussion selon la revendication 2, caractérisée en ce que le fluide sous pression est amené, par un ou plusieurs alésages (6, 8) ménagés dans la vanne-pilote principale (7) et dans la soupape-pilote, vers le piston frappeur (10) muni d'un trou borgne de grande section, avec mise sous pression permanente de la surface plus petite du piston différentiel.
4. Perceuse à percussion selon la revendication 1, caractérisée en ce que l'alésage de commande (21) pour la mise sous pression de la chambre de commande (21') est disposé dans la région d'un épaulement sur la soupape-pilote et qu'il est ouvert voire fermé par une arête de commande (20) qui forme l'une des délimitations de la chambre de commande (21').
5. Perceuse à percussion selon l'une des revendications 1 ou 4, caractérisée en ce que l'alésage de mise à l'atmosphère (24) est également disposé dans la soupape-pilote (25) et amené vers l'extérieur par l'intermédiaire d'une chambre annulaire (39) et d'alésages (31, 32) et que cet alésage de mise à l'atmosphère est ouvert ou fermé par une arête de commande (23) formant l'autre délimitation de la chambre de commande (21').
6. Perceuse à percussion selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'un épaulement radial extérieur sur la vanne-pilote principale (7) est guidé, avec formation d'un compartiment cylindrique (4), dans un élargissement cylindrique et que le compartiment cylindrique (41) est mis sous pression ou mis à l'atmosphère par l'intermédiaire d'un alésage de commande (40) de la soupape-pilote (50).
7. Perceuse à percussion selon la revendication 3, caractérisée en ce que la soupape-pilote (50) est plus longue que la vanne-pilote principale (7), qu'un insert tubulaire (9) réglable dans le sens longitudinal forme, avec la face frontale (43) contiguë de la vanne-pilote principale (7) un premier siège de soupape (42), qu'une surface de soupape (46) à la périphérie extérieure de la vanne-pilote principale (7) forme avec une surface de soupape (47) à la soupape-pilote (50) une deuxième soupape, et que, lorsque la première soupape (42, 43) est ouverte et la deuxième soupape (46, 47) fermée, la surface plus grande du piston différentiel est mise sous pression et mise à l'atmosphère dans la position inverse des soupapes.
8. Perceuse à percussion selon la revendication 7, caractérisée en ce que les surfaces de soupape (43, 46) de la vanne-pilote principale (7) sont constituées par un élargissement qui s'étend radialement vers l'extérieur.
9. Perceuse à percussion selon l'une des revendications 7 ou 8, caractérisée en ce que l'insert (9) peut être réglé, à l'intérieur de la soupape-pilote (50), par l'intermédiaire d'un raccordement fileté.
10. Perceuse à percussion selon l'une quelconque des revendications 1 à 9, caractérisée en ce que, dans les deux positions de fin de course du piston frappeur (10), des éléments (55, 56), avec accouplement à friction entre le piston frappeur (10) et la partie fixe (13, 54) de la perceuse à percussion, réalisent automatiquement une rotation angulaire bien connue en soi à partir du mouvement oscillatoire du piston frappeur (10).
11. Perceuse à percussion selon l'une des revendications 1 ou 4, caractérisée en ce que l'épaulement de pression (25) et une surface (28) qui lui fait face voire la saillie sur la soupape-pilote (50) coopèrent avec l'arête de commande (23) pour la commande de l'alésage de mise à l'atmosphère (24) et, avec une autre surface (62) sur le piston frappeur (10), de telle façon que, en cas de défaillance du mouvement hydraulique de la soupape-pilote (50) par rapport au piston frappeur (10), la soupape-pilote (50) est déplacée mécaniquement par l'impact des surfaces, de l'arête ou de l'épaulement coopérants.
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
DE3034211 1980-09-11
DE3034211A DE3034211C2 (de) 1980-09-11 1980-09-11 Mit einer Druckflüssigkeit beaufschlagbare Schlag- und Bohrvorrichtung

Publications (2)

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

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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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102168523A (zh) * 2011-04-27 2011-08-31 兰桥昌 钻机的主传动和变速系统及其操纵机构
CN102817555A (zh) * 2012-08-31 2012-12-12 涂文斌 水能冲击器

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59209775A (ja) * 1983-05-13 1984-11-28 株式会社ランドマ−クウエスト さく岩機
SE444127B (sv) * 1984-06-25 1986-03-24 Atlas Copco Ab Tryckvetskedriven senkborrmaskin
DE4131070C2 (de) * 1991-09-18 1993-11-18 Ingenieurkontor Fuer Maschinen Hydraulisch getriebener Schlagbohrhammer
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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2257753C3 (de) * 1972-11-24 1975-06-05 Georg Haerke Ag Rohr- Und Kanal-Reinigungsgeraete-Maschinen- Und Fahrzeugbau, 5630 Remscheid Mit einer Druckflüssigkeit beaufschlagbare Schlag- und Bohrvorrichtung
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
DE2536143C2 (de) * 1975-08-13 1982-01-28 Institut gornogo dela Akademii Nauk Kazachskoj SSR, Alma-Ata Hydraulisches Schlaggerät
US4072198A (en) * 1976-04-30 1978-02-07 Chicago Pneumatic Tool Company Hydraulic rock drill
US4157121A (en) * 1977-02-04 1979-06-05 Chicago Pneumatic Tool Co. Hydraulic powered rock drill

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102168523A (zh) * 2011-04-27 2011-08-31 兰桥昌 钻机的主传动和变速系统及其操纵机构
CN102817555A (zh) * 2012-08-31 2012-12-12 涂文斌 水能冲击器

Also Published As

Publication number Publication date
EP0047944A1 (fr) 1982-03-24
DE3034211A1 (de) 1982-03-25
DE3167834D1 (en) 1985-01-31
DE3034211C2 (de) 1983-03-17
ATE10871T1 (de) 1985-01-15

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