US3529681A - Hydraulically controlled vibrohammer - Google Patents

Hydraulically controlled vibrohammer Download PDF

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Publication number
US3529681A
US3529681A US788485A US3529681DA US3529681A US 3529681 A US3529681 A US 3529681A US 788485 A US788485 A US 788485A US 3529681D A US3529681D A US 3529681DA US 3529681 A US3529681 A US 3529681A
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United States
Prior art keywords
ram
tool
fixed
fluid
oil
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 - Lifetime
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US788485A
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English (en)
Inventor
Emile Georges Berrie
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Individual
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Individual
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/26—Placing by using several means simultaneously
    • 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
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/02—Placing by driving
    • E02D7/06—Power-driven drivers
    • E02D7/10—Power-driven drivers with pressure-actuated hammer, i.e. the pressure fluid acting directly on the hammer structure
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/18—Placing by vibrating

Definitions

  • the weight and ram drive various working tools through an auxiliary terminal element preferably including coupling means enabling a selected degree of elasticity between the ram and the tool so the tool can be driven either by percussion or in a vibratory condition at controlled intensity.
  • the selected tool can be driven in rotation as well as longitudinally, if desired, as When the apparatus is for drilling boreholes.
  • the present invention relates to an apparatus known as a Vibrmhammer, which finds its use in the drilling of boreholes, driving piles and sheet-piling, or any other operations which require that a tool should be given movements of percussion or vibration, most frequently combined with a rotary movement favourable to the effectiveness of the work of the said tool.
  • This apparatus essentially comprises a heavy weight or ram which it is necessary to displace with a reciproeating movement of translation inside a hollow Weight, under the action of a fluid, means for injecting a fluid for the purpose of imparting the reciprocating movement to the ram, means for fixing the tool, elastic means being interposed at will between the tool and the ram, said apparatus being characterized in that the fluid pressure is applied to the interior of two axial cylindrical chambers or cylinders formed at the two extremities of the ram, inside which are engaged two fixed pistons secured facing each other to the two ends of the hollow weight.
  • the above-mentioned hollow weight and the ram play respectively the parts of an inertia mass and a striking mass, to the effects of which is subjected an auxiliary terminal element which carries the various working tools.
  • the apparatus further comprises means for driving the tool in rotation, this characteristic feature being especially desirable when the apparatus is intended for drilling boreholes.
  • the proposed apparatus is actuated by a hydraulic motor driving a doublepiston pump which delivers oil under pressure alternately into one and then the other of two axial cylindrical chambers bored at the two opposite extremities of the ram, and into which pass two fixed pistons secured facing each other to the two opposite ends of the external hollow weight.
  • the terminal element to which the tool is fixed is coupled to the external hollow weight by an elastic device provided with an adjusting system enabling the degree of elasticity of this device to be varied so that the said tool can work, depending on the various cases, either by percussion or in a vibratory condition at controlled intensity.
  • the oil circulation system which forms part of the equipment of the apparatus is established in such manner that, for the purpose of precluding abnormal heating of the said oil, a constant renewal of the oil is ensured inside the cylinders of the piston pump of the hydraulic device which actuates the ram.
  • the terminal element to which the tool is fixed is provided with a planetary gear-box having a step-up gear ratio, the axial output pinion of Which carries a mandrel with an automatic clamping action, adapted to receive a central drilling device capable of working in the core of a tubular member directly fixed to the said terminal element.
  • FIG. 1 is a view in axial section of the vibro-hammer incorporating the present invention
  • FIG. 2 is a diagram which shows the structure of the circuit ensuring renewal of the oil.
  • FIG. 1 of the drawings there can be seen the two essential elements of the apparatus, comprising the external weight 1, in the cylindrical cavity 2 of which is located the ram 3, which can slide freely and is appropriately fitted with guiding rings 4.
  • an oil pump 5 which in the present case is actuated by a hydraulic motor 6, the oil inlet and outlet conduits of which are indicated partially at 7 and 8.
  • a shockabsorber device of a suitable type (not shown).
  • a cylindrical tail 21 which passes freely through the eye pierced in the centre of the check of the coupling bell 22.
  • a retention plate 23 serving as a seating element for a series of Belleville washers 24 which are interposed between the plate and a retaining ring 25 fixed on the said tail 21.
  • the retention plate 23 is fixed at its opposite extremities to the rods 26 of the pistons of two hydraulic doubleacting jacks, the bodies 27 of which are rigidly fixed to the above-mentioned bell 22.
  • the hydraulic system thus established permits, by a mere action on the distributor 29, the control at will of the simultaneous retractions or extensions of the two jacks considered, and consequently enables the degree of compression of the elastic washers 24 to be varied.
  • the tool will work by percussion as long as the bell 22 does not come into contact with the retaining ring 25, and it will follow a vibratory operation when the said bell becomes seated on the said ring.
  • the work of the tool may be facilitated by combining with the movements in an axial direction to which it is subjected, a rotary movement which may conveniently be impressed on the bell 22.
  • the bell 22 is equipped with a gearbox having a step-up gear ratio of which only the four essential elements have been conventionally shown in the drawing, namely: a crown-wheel 32 with internal teeth, fixed to the said bell and engaging with a train of planetary pinions 33 driving an axial driven pinion 34 which carries a mandrel with automatic clamping, started at 35, and adapted to receive conventional drilling rods.
  • the apparatus will permit the execution of a bore in the interior of a tubular device directly fixed to the bell 22, by means of a tool which is gripped by the mandrel 35 and is set in rotation in a direction opposite to the gyratory movement of the said bell as soon as it meets with a certain resistance from the ground.
  • FIG. 2 there is again found the hydraulic motor 6 and its outlet conduit 8 which terminates at the oil tank (not shown). At two points on this conduit 8 are connected two branch pipes 36 and 37 which open respectively into first one and then the other of the two cylinders 11 and 11' of the pump 5, and on the downstream side of which a throttling valve 38 having an adjustable flow-rate is arranged on the said conduit 8.
  • the motor-pump set 65 which, in accordance with the form of embodiment, detailed above, was rigidly fixed to the external striking mass 1, may be fixed to the ram 3, on condition that certain simple arrangements employing conventional mechanical means are adopted.
  • An apparatus intended for carrying out various kinds of work, in particular drilling boreholes and pile-driving, which can impart at will longitudinal movements to a tool which is fitted to it, either of percussion or of vibration, said apparatus comprising a weight or ram adapted to be displaced with an alternating movement of translation inside a hollow weight, under the action of a fluid, means for injecting a fluid in order to effect the alternating move ment of said ram, means for fixing the tool, elastic means capable of being interposed at will between said tool and said ram, said apparatus being characterized in that the fluid pressure is applied in the interior of two axial cylindrical chambers or cylinders formed at the two extermities of the ram, inside which are engaged two fixed pistons secured opposite each other to the two ends of said hollow weight.
  • circuit of fluid under pressure comprises a throttling valve having a variable flow-rate, disposed on a conduit which directly joins the fluid admission pipe for the pump to the return or exhaust circuit of said fluid.
  • An apparatus as claimed in claim 1 characterized in that it comprises at its lower portion a terminal toolcarrier element coupled to said ram by a device of adjustable elasticity.
  • said elastic device is constituted by a compression spring system arranged around a rod rigidly fixed to the striking weight and supported at one extremity on a seating base or plate adapted to slide freely on said rod, but fixed at an adjustable height to said terminal element, said spring system being locked at its other extremity by a ring fixed on the rod in the interior of said same terminal element and in abutment against the internal wall of said element.
  • An apparatus as claimed in claim 12. characterized in that said seating base or plate of said spring system is adjustable in height by the action of two double-acting hydraulic jacks, said jacks being supported at one extremity on said seating plate and at the other extremity on the internal face of said terminal element.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
US788485A 1968-01-03 1969-01-02 Hydraulically controlled vibrohammer Expired - Lifetime US3529681A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR134775 1968-01-03

Publications (1)

Publication Number Publication Date
US3529681A true US3529681A (en) 1970-09-22

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ID=8644104

Family Applications (1)

Application Number Title Priority Date Filing Date
US788485A Expired - Lifetime US3529681A (en) 1968-01-03 1969-01-02 Hydraulically controlled vibrohammer

Country Status (8)

Country Link
US (1) US3529681A (is)
BE (1) BE726431A (is)
DE (1) DE1817296A1 (is)
ES (1) ES362032A1 (is)
FR (1) FR1560409A (is)
IL (1) IL31357A (is)
LU (1) LU57738A1 (is)
NL (1) NL6900082A (is)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026370A (en) * 1974-04-03 1977-05-31 Secretary Of State For Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain & Northern Ireland Driving tools
US4650008A (en) * 1983-09-19 1987-03-17 Simson and Partner Pile driver and extractor
WO2010059036A1 (en) 2008-11-21 2010-05-27 Magali Hadar Rebound-effector
US20150027744A1 (en) * 2012-03-15 2015-01-29 Aydin Ozkan Variable moment resonance-free vibro hammer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US904528A (en) * 1908-01-18 1908-11-24 James Hamilton Power-hammer.
US3009522A (en) * 1957-03-27 1961-11-21 Julius W Bedner Pile-driver with a hydraulically operated pile rammer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US904528A (en) * 1908-01-18 1908-11-24 James Hamilton Power-hammer.
US3009522A (en) * 1957-03-27 1961-11-21 Julius W Bedner Pile-driver with a hydraulically operated pile rammer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026370A (en) * 1974-04-03 1977-05-31 Secretary Of State For Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain & Northern Ireland Driving tools
US4650008A (en) * 1983-09-19 1987-03-17 Simson and Partner Pile driver and extractor
WO2010059036A1 (en) 2008-11-21 2010-05-27 Magali Hadar Rebound-effector
US20150027744A1 (en) * 2012-03-15 2015-01-29 Aydin Ozkan Variable moment resonance-free vibro hammer

Also Published As

Publication number Publication date
BE726431A (is) 1969-06-16
LU57738A1 (is) 1969-05-12
DE1817296A1 (de) 1971-03-18
ES362032A1 (es) 1970-11-01
IL31357A (en) 1972-02-29
NL6900082A (is) 1969-07-07
FR1560409A (is) 1969-03-21
IL31357A0 (en) 1969-02-27

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