EP0070246B1 - Hydraulische Schlageinrichtung - Google Patents

Hydraulische Schlageinrichtung Download PDF

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Publication number
EP0070246B1
EP0070246B1 EP82420091A EP82420091A EP0070246B1 EP 0070246 B1 EP0070246 B1 EP 0070246B1 EP 82420091 A EP82420091 A EP 82420091A EP 82420091 A EP82420091 A EP 82420091A EP 0070246 B1 EP0070246 B1 EP 0070246B1
Authority
EP
European Patent Office
Prior art keywords
chamber
piston
distributor
high pressure
pressure circuit
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
EP82420091A
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English (en)
French (fr)
Other versions
EP0070246A1 (de
Inventor
Roger Montabert
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.)
Montabert SAS
Original Assignee
Montabert SAS
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 Montabert SAS filed Critical Montabert SAS
Priority to AT82420091T priority Critical patent/ATE9071T1/de
Publication of EP0070246A1 publication Critical patent/EP0070246A1/de
Application granted granted Critical
Publication of EP0070246B1 publication Critical patent/EP0070246B1/de
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
    • B25D9/16—Valve arrangements therefor
    • B25D9/20—Valve arrangements therefor involving a tubular-type slide valve
    • 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
    • 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
    • B25D2209/00—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D2209/002—Pressure accumulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2209/00—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D2209/005—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously having a tubular-slide valve, which is coaxial with the piston

Definitions

  • the present invention relates to a percussion device driven by a pressurized fluid such as an incompressible hydraulic fluid.
  • This device provides, by means of a striking striking mass in the form of a piston, a succession of percussions on a tool.
  • the piston is slidably mounted in a cylinder which, formed in the body of the device and comprising lights, connected by channels, is also used for the sliding of a distributor putting the chamber located above the piston in alternative communication with the high pressure circuit to allow rapid descent of the piston and with a low pressure circuit to allow the return stroke of this piston.
  • the distributor is pushed by a spring in the direction of the tool, in accordance with the subject of French patent No 1431835.
  • the dispenser can for example be moved not by the spring, but by pushers driven by hydraulic pressure, in accordance with certificate of addition No 2045289 to French patent No 1431835, or be moved by a central plunger with two opposite rods in accordance with French patent FR-A No 2369908.
  • This return compression wave is usually dissipated either in the body of the device via the flange of the tool, or returned to the piston in the form of kinetic energy.
  • the piston rebounds and pushes the fluid towards the low pressure circuit in the form of a hydraulic pressure wave usually called water hammer in hydraulic installations.
  • the object of the invention is to allow the recovery of the energy contained in the compression wave back in the tool, in order to reuse it later.
  • the apparatus which it relates comprises, on the one hand, a non-return valve allowing the passage of fluid from the chamber located above the striking piston towards the high pressure circuit and, on the other hand, means ensuring a sequential movement of the distributor, so that, starting from a position in which the chamber located above the piston is in communication with the high pressure, the distributor moves very quickly to a position in which it cuts the communication between said chamber and the high pressure, then at reduced and controlled speed, so as to delay the communication of the chamber with the low pressure network, in order to allow, throughout the isolation time of the chamber located above the piston vis-à-vis the high pressure and low pressure networks, the maximum recovery of the energy of restitution, by compression of the fluid isolated in the chamber and passage of this latter in the high pressure network by the non-return valve.
  • the traveling time of the striker district between the closure of the communication between the chamber situated above the piston and the high pressure network and the communication of this same chamber with the low pressure network is equal to the time necessary for the most important restitution known according to the hardest rocks.
  • This feature allows maximum energy recovery, regardless of the nature of the material to be broken with this percussion device.
  • the distributor undergoes a new acceleration movement as soon as the chamber located above the piston is in communication with the low pressure network, so as to largely release this opening and to allow a free movement of the moving striking mass.
  • the distributor comprises two parts of different sections, namely a part located on the side of the piston, of section corresponding to the section of the cylinder in which the striking piston is slidably mounted, and a part of larger section located on the side opposite to the piston, this part of larger section being mounted in a cavity which, extending the cylinder, is of section greater than that of the part of large section of the distributor, this part of large section of dispenser can enter a chamber of the same section as it, disposed between the cylinder and the enlarged cavity, the beginning of penetration into this chamber being made when the dispenser arrives in a position in which it closes the communication between the chamber located at above the piston and the high pressure network, the annular volume delimited by the chamber of intermediate section and by the connection between the two sections of the distributor communicating with the chamber located above the piston by at least one calibrated leak orifice.
  • the calibrated orifice allowing the escape of fluid from the annular chamber is formed in the wall externally limiting the latter.
  • a channel is formed axially in the distributor, the end of which opens into the crown connecting the zones of different sections of the distributor forms the calibrated orifice ensuring the escape of fluid from the annular chamber.
  • the distributor 10 comprises two parts of different sections, namely a lower part 16 of diameter corresponding to that of the cylinder 4 in which the striking piston 2 moves, engaged in the upper end of this cylinder, and an upper part 17 of larger section.
  • This part 17 is housed in a cavity 18 of section substantially greater than its own.
  • the increase in section of the cavity 18 relative to that of the dispenser 17 is obtained by providing a lateral recess in the form of a half-moon, while in FIG. 7, the cavity 18 comprises two diametrically opposite recesses, each in the shape of a half-moon.
  • Part 17 of the dispenser can, however, enter a chamber 19 of section corresponding to its own, the chamber 19 extending the cylinder 4.
  • the dimensions of the chamber 19 and the enlarged part 17 or collar of the distributor are such that the distributor ensures the closure of the passage between the high pressure 12 and the chamber 11 situated above the piston when the collar 17 arrives at the level of chamber 19 and comes close it.
  • non-return valve 22 aims to allow the passage of pressurized fluid from the chamber 11 to the high pressure network 12.
  • This travel time during which the chamber 11 will be isolated from both the high pressure 12 and low pressure networks 13 will allow, as shown in FIG. 3, the maximum recovery of the energy of restitution by passage of the compressed fluid by the striking piston 2 from the chamber 11 towards the high pressure network, and more precisely towards the accumulator 24 thereof via the valve. non-return 22.
  • This phase corresponds to the displacement (d1, d2) of the distributor during the period (t1, t2) of the diagram in FIG. 13.
  • Fig. 8 shows a variant of the exhaust of the annular chamber 19.
  • a channel 25 is formed axially in the distributor which opens into the crown 23 connecting its zones of different sections.
  • the function of escaping the fluid through the channel 25 is exactly the same as through the calibrated orifice 20.
  • the non-return valve 22 is returned to its seat, thanks to a central chamber 26 located under the head of the valve, which is connected by a channel 29 to the low pressure network.
  • the non-return valve 22 is returned to its seat, thanks to an annular chamber 27 which, resulting from the difference between two diameters 28a and 28b, is connected by a channel 29 to the low pressure network.
  • valve 22 is held in the closed position by the vacuum existing between the high pressure network 12 and the chamber 11 as soon as the direction of circulation of the fluid tends to reverse, because the valve lift is limited by a stop 30 to a reduced game J.
  • valve 22 is returned to the closed position by a spring 32 bearing, on the one hand, on the valve and, on the other hand, on a stop 33 located on the side of the high pressure network.
  • FIG. 12 of the drawing shows an alternative embodiment of the apparatus of FIGS. 1 to 5, in which the distributor 10 is no longer subjected to the action of a spring 14, but to the action of a central plunger 34 with two opposite rods.
  • the valve return device shown in FIG. 8 any of those shown in FIGS. 9 to 11 can be considered.
  • the distributor 10 has a groove 35 formed between the cylindrical parts 16 and 17.
  • the body of the cylinder 4 is also formed at least one channel 36 which is broadly dimensioned and which, opening into the cavity in which the cylindrical part 16 slides , communicates with the cavity 18.
  • the channel 36 is also positioned so as to put the annular volume formed by the groove 35 into communication with the low pressure network, as soon as the position of the distributor 10 ensures the communication of the chamber 11 with the low pressure network. This allows a further acceleration of the movement of the dispenser.
  • the fluid escaping from the chamber 18 is produced by a channel 25, as in the case shown in FIG. 8.
  • a groove 37 is formed at the periphery of the chamber 19, and a channel 38 is formed in the distributor, capable of placing the chamber 19 in broad communication with the low pressure network, as soon as the position of the distributor 10 ensures the setting in communication of chamber 11 with the low pressure network.
  • the invention brings a great improvement to the existing technique by providing a percussion device whose structure is not more complex than that of traditional devices, and which has much higher performance and reliability. to those of the latter.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Pens And Brushes (AREA)
  • Valve Device For Special Equipments (AREA)
  • Surgical Instruments (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Catching Or Destruction (AREA)
  • Lasers (AREA)
  • Earth Drilling (AREA)

Claims (8)

1. Mit Druckfluid betribenes Schlaggerät, das eine bewegliche Schlagmasse (2) in Form eines aufeinanderfolgend Schläge auf ein Werkzeug (3) ausübenden Kolbens enthält, der in einem im Gerätekörper (5) ausgebildeten und über Kanäle (8, 9) verbundene Öffnungen (6, 7) aufweisenden Zylinder geführt angeordnet ist, der ausserdem einen Verteiler (10) führt, der eine oberhalb des Kolbens angeordnete Kammer (11) alternativ mit einem Hochdruckkreis (12) zum Ausführen einer schnellen Abwärtsbewegung des Kolbens und mit einem Niederdruckkreis(13) zum Ausführen des Kolbenrückhubs in Verbindung bringt, dadurch gekennzeichnet, dass es zum einen ein das fluid aus der oberhalb des Schlagkolbens angeordneten Kammer (11) zum Hochdruckkreis (12) durchlassendes Rückschlagventil (22) und zum anderen Mittel enthält, die eine Folgeverschiebung des Verteilers (10) sicherstellen, derart, dass ausgehend von einer Stellung, in der die oberhalb des Kolbens angeordnete Kammer (11) mit dem Hochdruck (12) in Verbindung steht, der Verteiler sich sehr schnell bis zu einer Stellung, in der er die Verbindung zwischen dieser Kammer und dem Hochdruck trennt, dann mit reduzierter und kontrollierter Geschwindigkeit so verlagert, dass das Herstellen der Verbindung der Kammer (11) mit dem Niederdruckkreis (13) verzögert wird, und während der gesamten Dauer der Isolierung der oberhalb des Kolbens angeordneten Kammer gegenüber dem Hochdruck- und dem Niederdruckkreis durch Kompression des in der Kammer isolierten Fluids und dessen Übergang durch das Rückschlagventil in den Hochdruckkreis die maximale Rückgewinnung der zurückgegebenen Energiezu ermöglichen.
2. Schlaggerät nach Anspruch 1, dadurch gekennzeichnet, dass die Verschiebezeit des Verteilers (10) zwischen dem Verschliessen der Verbindung zwischen der oberhalb des Kolbens angeordneten Kammer (11) und dem Hochdruckkreis (12) und dem Verbinden dieser Kammer (11) mit dem Niederdruckkreis (13) gleich der Zeit ist, die für den stärksten bekannten Abprall in Funktion des härtesten Gesteins erforderlich ist.
3. Schlaggerät nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Verteiler (10) eine neue Beschleunigungsbewegung erfährt, sobald die oberhalb des Kolbens angeordnete Kammer (11) in Verbindung mit dem Niederdruckkreis (13) steht, derart, dass diese Öffnung weit freigegeben und eine freie Verlagerung der beweglichen Schlagmasse (2) ermöglicht wird.
4. Schlaggerät nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Verteiler (10) zwei Bereiche mit unterschiedlicher Schnittgestalt aufweist, nämlich einen kolbenseitigen Bereich (16), dessen Schnittgestalt der des Zylinder (4) entspricht, in dem der Schlagkolben geführt angeordnet ist, und einen dem Kolben abgewandten Bereich mit grösserer Schnittgestalt, der in einem den Zylinder verlängernden Hohlraum (18) angeordnet ist, der eine grössere Schnittgestalt als der Verteilerbereich mit grosser Schnittgestalt besitzt, wobei dieser Verteilerbereicht mit grosser Schnittgestalt in eine Kammer (19) gleicher Schnittgestalt wie dieser eindringen kann, die zwischen dem Zylinder (4) und dem erweiterten Hohlraum (18) angeordnet ist, wobei das Eindringen in diese Kammer (19) beginnt, wenn der Verteiler (10) eine Stellung erreicht, in der er die Verbindung zwischen der oberhalb des Kolbens angeordneten Kammer (11) und dem Hochdruckkreis (12) schliesst, und wobei das durch die Kammer (19) mit mittlerer Schnittgestalt und durch den Übergang zwischen den beiden Veteilerbereichen begrenzte Ringvolumen mit der oberhalb des Kolbens angeordneten Kammer (11) über mindestens einen Durchgang (20) in Verbindung steht.
5. Schlaggerät nach Anspruch 4, dadurch gekennzeichnet, dass der das Entweichen des Fluids aus der Ringkammer (19) ermöglichende Durchgang (20) in der die Ringkammer aussen begrenzenden Wand ausgebildet ist.
6. Schlaggerät nach den Ansprüchen 3, 4 und 5, dadurch gekennzeichnet, dass der Verteiler (10) zwischen den beiden zylindrischen Bereichen (16, 17) unterschiedlicher Schnittgestalt eine Nut (35) besitzt und dass mindestens ein Kanal (36) in den Zylinder mündet, über den das durch die Nut (35) begrenzte Ringvolumen mit dem Niederdruckkreis verbindbar ist, sobald die Stellung des Verteilers (10) die Verbindung der oberhalb des Kolbens angeordneten Kammer (11) mit dem Niederdruckkreis sicherstellt.
7. Schlaggerät nach Anspruch 4, dadurch gekennzeichnet, dass im Verteiler (10) ein Kanal (25) axial angeordnet ist, dessen in dem Absatz (23), der die Verteilerbereiche unterschiedlicher Schnittgestalt verbindet, ausmündendes Ende die kalibrierte Öffnung bildet, die das Entweichen des Fluids aus der Ringkammer sicherstellt.
8. Gerät nach den Ansprüchen 3, 4 und 7, dadurch gekennzeichnet, dass die Kammer (19), in der die Kompression des Fluids im Verlaufe der Verteilerbewegung stattfindet, eine Umfangsnut (37) bildet, die über einen im Verteiler ausgebildeten Kanal (18) in Verbindung mit dem Niederdruckkreis gebracht werden kann, sobald dessen Stellung die Verbindung der oberhalb des Kolbens angeordneten Kammer (11) mit dem Niederdruckkreis sicherstellt.
EP82420091A 1981-07-10 1982-07-06 Hydraulische Schlageinrichtung Expired EP0070246B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82420091T ATE9071T1 (de) 1981-07-10 1982-07-06 Hydraulische schlageinrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8114043 1981-07-10
FR8114043A FR2509217A1 (fr) 1981-07-10 1981-07-10 Appareil a percussions mu par un fluide sous pression

Publications (2)

Publication Number Publication Date
EP0070246A1 EP0070246A1 (de) 1983-01-19
EP0070246B1 true EP0070246B1 (de) 1984-08-22

Family

ID=9260646

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82420091A Expired EP0070246B1 (de) 1981-07-10 1982-07-06 Hydraulische Schlageinrichtung

Country Status (12)

Country Link
EP (1) EP0070246B1 (de)
JP (1) JPS5912428B2 (de)
AT (1) ATE9071T1 (de)
AU (1) AU540338B2 (de)
BR (1) BR8203985A (de)
CA (1) CA1205353A (de)
DE (2) DE3260607D1 (de)
ES (1) ES513330A0 (de)
FI (1) FI78857C (de)
FR (1) FR2509217A1 (de)
NO (1) NO151109C (de)
ZA (1) ZA824781B (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2141657A (en) * 1983-05-10 1985-01-03 Panther Equip Ltd Improvements in hydraulically operated hammers
FR2550983A1 (fr) * 1983-08-25 1985-03-01 Montabert Ets Appareil a percussions hydraulique
DE3443542A1 (de) * 1984-11-29 1986-06-05 Fried. Krupp Gmbh, 4300 Essen Hydraulische schlagvorrichtung
FR2595972B2 (fr) * 1985-07-16 1989-10-20 Montabert Ets Appareil a percussions
FR2602448B1 (fr) * 1986-08-07 1988-10-21 Montabert Ets Procede de regulation des parametres de percussion du piston de frappe d'un appareil mu par un fluide incompressible sous pression, et appareil pour la mise en oeuvre de ce procede
FR2618092B1 (fr) * 1987-07-17 1989-11-10 Montabert Ets Distributeur hydraulique pour appareil a percussions mu par un fluide incompressible sous pression
DE68928143T2 (de) * 1989-10-18 1997-12-11 Mauro Vitulano Verfahren zum automatischen Anpassen der Funktionsparameter eines Schlagapparates
ATE145028T1 (de) * 1992-01-21 1996-11-15 Bsp Int Foundation Ventilsteuervorrichtung
IT1312140B1 (it) * 1999-06-22 2002-04-09 Priver Ind Srl Macchina oleodinamica a percussione di concezione innovativafunzionante a pressione idraulica costante.
CN110107220B (zh) * 2019-05-05 2020-12-04 三峡大学 撞击装置及凿岩设备

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1431835A (fr) * 1965-01-28 1966-03-18 Montabert Ets Appareil à percussions
CA941264A (en) * 1970-04-03 1974-02-05 Etablissements Montabert Dispositif de commande du distributeur d'un appareil a percussions mu par un liquide sous pression
US3991655A (en) * 1974-11-11 1976-11-16 Hydroacoustics Inc. Hydroacoustic apparatus and valving mechanisms for use therein
FI751895A (de) * 1975-06-26 1976-12-27 Xandor Ag
FI56430C (fi) * 1975-10-20 1982-08-09 Tampella Oy Ab Slaganordning driven av en tryckvaetska
FR2369908A1 (fr) * 1976-11-08 1978-06-02 Montabert Roger Appareil a percussions hydraulique
SU945412A2 (ru) * 1978-12-27 1982-07-23 Ордена Трудового Красного Знамени институт гидродинамики СО АН СССР Устройство ударного действи

Also Published As

Publication number Publication date
CA1205353A (fr) 1986-06-03
FR2509217B1 (de) 1984-08-10
BR8203985A (pt) 1983-07-05
FI78857B (fi) 1989-06-30
FI822439A0 (fi) 1982-07-08
ES8304466A1 (es) 1983-03-16
ES513330A0 (es) 1983-03-16
AU8577882A (en) 1983-01-13
NO151109C (no) 1985-02-13
FI822439L (fi) 1983-01-11
FR2509217A1 (fr) 1983-01-14
DE3260607D1 (en) 1984-09-27
AU540338B2 (en) 1984-11-15
FI78857C (fi) 1989-10-10
JPS5912428B2 (ja) 1984-03-23
ZA824781B (en) 1983-04-27
DE70246T1 (de) 1983-05-11
NO822392L (no) 1983-01-11
JPS5871081A (ja) 1983-04-27
NO151109B (no) 1984-11-05
EP0070246A1 (de) 1983-01-19
ATE9071T1 (de) 1984-09-15

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