WO2014196879A1 - Améliorations apportées et se rapportant à un équipement de commande d'impact et de battage de pieux - Google Patents

Améliorations apportées et se rapportant à un équipement de commande d'impact et de battage de pieux Download PDF

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Publication number
WO2014196879A1
WO2014196879A1 PCT/NZ2014/000110 NZ2014000110W WO2014196879A1 WO 2014196879 A1 WO2014196879 A1 WO 2014196879A1 NZ 2014000110 W NZ2014000110 W NZ 2014000110W WO 2014196879 A1 WO2014196879 A1 WO 2014196879A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
driving apparatus
impact driving
primary piston
charge
Prior art date
Application number
PCT/NZ2014/000110
Other languages
English (en)
Inventor
Rodney Warwick Sharp
Original Assignee
Progressive Ip Limited
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 Progressive Ip Limited filed Critical Progressive Ip Limited
Priority to AU2014275576A priority Critical patent/AU2014275576A1/en
Priority to US14/896,570 priority patent/US20160138238A1/en
Publication of WO2014196879A1 publication Critical patent/WO2014196879A1/fr

Links

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
    • E02D7/02—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
    • E02D7/02—Placing by driving

Definitions

  • the present invention is directed to apparatus such as used for driving posts and piles into the ground, and typically where the post or pile is impacted. It can also be used for other impact driving applications such as rock breaking, mining, et.c
  • the present invention is directed to impact and post drivers, though it should be appreciated that they may find other applications.
  • Typical impact type pile drivers use a falling weight to impact the top of a post or pile.
  • increasing the height which the weight falls incrementasing the velocity
  • has an exponential increase in the resulting applied force as opposed to the linear increase in force resulting from increasing mass.
  • pile drivers are limited in both their height and mass able to be lifted. The consequence is that as heavy a mass as can be lifted (and supported) reasonably is used, but as high a height (drop) as possible is used.
  • pile and post drivers are large, bulky, and tall machines and often have to be disassembled, or require special consideration, for transport. This does limit their use, which commonly where the expense and difficulty of getting the pile driver to the site is justified - such as on large building projects.
  • the diesel hammer utilises a falling weight compressing air and igniting injected diesel fuel to help drive an impact head against the pile as well as driving the weight back up and drawing in fresh air for a new cycle (falling/ignition/driving/lifting the weight).
  • Such devices are relatively efficient once running, but are noisy and largely continuous.
  • the height of a drop and frequency of driving cannot be controlled during the course of driving in diesel hammers. This can cause problems in certain ground formations, such as where there is underlying layers of minerals or bedrocks. It has been reported that the use of a diesel hammer in such situations can cause damage to the piles when it hits the more compacted layers. It was necessary to vary the parameters of driving in order to address this problem, which is beyond the scope of diesel hammers.
  • the prior art devices are largely limited to driving piles vertically. In some instances it is desirable to drive posts or piles at an angle - such as a fence or strainer post on a descending ridgeline or slope, where the posts are perpendicular to the fence wires which are in turn parallel to the contour of the hill.
  • the prior art devices are not typically suitable for such applications, even if able to be transported and stabilised in such a situation.
  • pile and impact driving equipment which allows driving parameters to be altered readily. This can include driving frequency, and impact force.
  • impact driving equipment in which there is provided an outer cylinder housing a primary internal cylinder assembly also acting as a weight, and wherein this primary internal cylinder includes an internal primary piston in turn connected to a striker plate;
  • the primary internal cylinder assembly being connected to an auxiliary piston within a further auxiliary piston and cylinder assembly, and in which sliding of the auxiliary piston therein is linked to movement of the primary internal cylinder assembly within the outer cylinder;
  • introducing fluid into said fluid reservoir area also introduces fluid to within said primary internal cylinder assembly, thereby pushing the primary internal piston against pressurized gas therein;
  • impact driving apparatus comprising an auxiliary piston assembly comprising an auxiliary piston and cylinder, and in which one side of the auxiliary piston can be charged to pressurise a compressible fluid on the other side thereof;
  • auxiliary piston being connected to a primary piston assembly in turn comprising at least a primary piston and associated cylinder assembly; said primary piston being able to be charged to pressurise a compressible fluid on the other side thereof; and wherein said primary piston assembly is able to slide within an outer housing;
  • impact driving apparatus substantially as described above, in which charging a piston comprises introducing hydraulic fluid into a reservoir bounded at least partly by a said piston and its associated cylinder. According to another aspect of the present invention there is provided impact driving apparatus, substantially as described above, in which the charge on a piston can be rapidly released.
  • impact driving apparatus substantially as described above, in which hydraulic fluid can be released through a port having a relatively large effective cross-sectional area.
  • a said port comprises a seated valve under bias towards a closed position.
  • impact driving apparatus substantially as described above, in which the charge on the auxiliary piston is released prior to the charge on the primary piston.
  • impact driving apparatus substantially as described above, in which the charge on the primary piston is released after its associated cylinder assembly has acquired velocity due to the release of the charge on the auxiliary piston.
  • impact driving apparatus substantially as described above, in which the parameters for timing of charge release, extent of pressurisation of compressible fluid, and component masses, are selected so that recoil on the travelling primary piston assembly after release of the charge on the primary piston causes said primary piston assembly to any one of slow, stop, and change direction.
  • impact driving apparatus substantially as described above, which includes means for slowing the striker element after it has travelled a predetermined distance.
  • impact driving apparatus substantially as described above, which comprises preventing further rapid release of hydraulic fluid acting on the primary piston.
  • impact driving apparatus substantially as described above, in which the compressible fluid is a gas.
  • impact driving apparatus substantially as described above, in which the gas is nitrogen, or an inert gas mixture.
  • impact driving apparatus substantially as described above, in which the striker element allows different heads to be attached or substituted.
  • impact driving apparatus substantially as described above, including mounting means for a vehicle.
  • the serial arrangement of piston assemblies potentially allow for an accumulation of kinetic energy which is delivered ultimately via the striker plate.
  • the potentially realisable advantages include being able to build a much more compact unit, when compared with the traditional prior art, for delivering a specific amount of energy. This then makes the device easier to transport, and to mount on smaller and more manoeuvrable vehicles.
  • auxiliary piston arrangement characterised by the fact that it is able to be charged to pressurise a compressible fluid, typically a gas.
  • a compressible fluid typically a gas.
  • the method of charging the piston against the compressible fluid is optional, but hydraulic arrangements are preferred in the preferred embodiments.
  • Another characteristic is to be able to release the pressure or force acting on the piston (to compress the compressible fluid) relatively quickly so that the piston can be driven and accelerated quite quickly by the compressed fluid.
  • a primary piston assembly including cylinder and piston. This primary piston assembly also acts as a mass, being effectively a driven weight accelerated by the release of the auxiliary piston.
  • the primary piston assembly is also characterised by its piston, i.e. the primary piston in the apparatus, being able to be charged to compress a compressible fluid, typically also a gas. Also, the charge causing the compression of the compressible fluid must also be able to be released relatively quickly. Again, the preferred method of charging the piston is hydraulically.
  • the charge acting on the primary piston is released after the primary piston assembly has begun accelerating. While the primaiy piston could be attached to a third piston assembly (ad infinitum), in the preferred embodiment it is connected to the striker plate.
  • the striker plate prior to release of the charge acting on the primary piston, already has kinetic energy by virtue of the associated mass (the primary piston assembly) to which it is connected, and the fact that this mass already has velocity due to the firing of the auxiliary piston assembly.
  • Figure 1 is a schematic cross-sectional drawing illustrating one preferred embodiment of the invention.
  • Figure 2 is a schematic cross-sectional drawing illustrating the embodiment of figure
  • the piston (J) is a fluid (typically hydraulic fluid) reservoir (H) in communication (not shown) via a non-return valve with another fluid reservoir (B) under floating piston (D).
  • the non-return valve allows fluid to travel from (H) to (B) but not from (B) to (H).
  • hydraulic fluid is introduced from (H) to (B). This then pushes piston (D) upwardly acting against nitrogen (or other) gas within reservoir (DT).
  • Reservoir area (B) is also open to the reservoir area (A) underneath a floating valve (G), which seats (VS) against the inside contours of middle cylinder (MC), by means of a further conduit (not shown) incorporating a flow rest ictor.
  • G floating valve
  • VS seats
  • MC middle cylinder
  • valve (G) has a larger surface area exposed to fluid in reservoir (A) than the surface area exposed to reservoir (B), and there is also a bias spring (F) pushing it (G) closed against seat (VS), the fluid in reservoir (B) cannot push valve (G) open.
  • bias spring (F) pushing it (G) closed against seat (VS)
  • the fluid in reservoir (B) cannot push valve (G) open.
  • piston (D) pushes against the nitrogen gas in (DT).
  • the uncompressed pressure may be around 50-300 Barr, and compressed around 80 to 400 Barr.
  • Piston (J) By pushing oil into reservoir area (H) we not only force oil into (B) and (A) but also start forcing piston (J) upwardly towards reservoir area (JT).
  • Piston (J) is connected by rod (L) to the middle cylinder (MC) which also acts as a floating weight.
  • the gas in reservoir (JT) may be equalized to that within the outer cylinder reservoir volume (OR) by virtue of floating piston (X) and which typically converts (OR) into a large accumulator area..
  • the pressure within (JT) is typically around 10-20 Barr but may be increased to 50-70 Barr, which is typically sufficient to support the weight of everything connected to piston (J) should the device be used on an angle or even inverted.
  • piston (D) is connected by rod (M) to striker plate (N), and thus also raises it.
  • volume (H) is not too big so that oil can be released rapidly via a release conduit (not shown).
  • the non-return valve between reservoir (H) and reservoir (B) prevents fluid from returning from (B) to (H) when the pressure from reservoir (H) is released. Thus the pressure in reservoir (B) does not alter.
  • FIG 2 illustrates in standard schematic form the main hydraulic fluid connections including pump connection (PM), tank connection (TK), restrictor valve (RV) and nonreturn valve (NRV).
  • PM pump connection
  • TK tank connection
  • RV restrictor valve
  • NV nonreturn valve

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Abstract

La présente invention se rapporte à un dispositif de commande d'impact qui comptent sur de multiples ensembles pistons et cylindres raccordés qui fonctionnent de façon séquentielle ; un premier ensemble piston auxiliaire chargé pour comprimer un fluide compressible avec un piston libère rapidement la charge sur ledit piston, ce qui permet au fluide comprimé, qui est, en règle générale, un gaz, d'accélérer ledit piston auxiliaire. Le piston auxiliaire est raccordé à un second ensemble piston primaire mobile qu'il accélère. Dans l'ensemble piston primaire, un piston primaire peut être chargé pour comprimer un fluide compressible. La charge sur le piston primaire peut également être rapidement libéré pour accélérer le piston primaire. Le piston primaire peut être raccordé à un élément de frappe ou des ensembles pistons et cylindres mobiles successifs qui se raccordent finalement à un élément de frappe.
PCT/NZ2014/000110 2013-06-07 2014-06-09 Améliorations apportées et se rapportant à un équipement de commande d'impact et de battage de pieux WO2014196879A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2014275576A AU2014275576A1 (en) 2013-06-07 2014-06-09 Improvements in and relating to pile and impact driving equipment
US14/896,570 US20160138238A1 (en) 2013-06-07 2014-06-09 Improvements in & relating to pile and post driving equipment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ611704 2013-06-07
NZ61170413 2013-06-07

Publications (1)

Publication Number Publication Date
WO2014196879A1 true WO2014196879A1 (fr) 2014-12-11

Family

ID=52008413

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ2014/000110 WO2014196879A1 (fr) 2013-06-07 2014-06-09 Améliorations apportées et se rapportant à un équipement de commande d'impact et de battage de pieux

Country Status (3)

Country Link
US (1) US20160138238A1 (fr)
AU (1) AU2014275576A1 (fr)
WO (1) WO2014196879A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937286A (en) * 1974-05-13 1976-02-10 Wagner Carl F Fence post driver
JPS57169130A (en) * 1981-12-21 1982-10-18 Toyoda Kikai Kogyo Kk Drop hammer
JPS6088721A (ja) * 1983-10-21 1985-05-18 Nippon Air Brake Co Ltd 油圧式杭打機
JPH10212728A (ja) * 1997-01-29 1998-08-11 Nippon Sharyo Seizo Kaisha Ltd 建設機械の油圧回路
KR100932662B1 (ko) * 2008-10-17 2009-12-21 권태운 휴대용 말뚝 항타기

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1014295A (en) * 1911-08-11 1912-01-09 Alexander Gibb Withdrawing of piles, posts, and the like.
US1222663A (en) * 1916-12-06 1917-04-17 Henry B Newhall Multiple-plunger impact-hammer.
GB1584356A (en) * 1976-11-02 1981-02-11 Hollandsche Betongroep Nv Pile driving apparatus
US4187917A (en) * 1977-11-30 1980-02-12 Hydroacoustics, Inc. Pile driver
GB2043510B (en) * 1979-02-27 1982-12-22 Hollandsche Betongroep Nv Pile driving apparatus
DE59406589D1 (de) * 1993-03-30 1998-09-10 Integral Medizintechnik Pneumatisches Schlagwerkzeug
US5727639A (en) * 1996-03-11 1998-03-17 Lee Matherne Pile driving hammer improvement
US6557647B2 (en) * 2000-05-30 2003-05-06 American Piledriving Equipment, Inc. Impact hammer systems and methods
FI115759B (fi) * 2002-05-17 2005-07-15 Yrjoe Raunisto Iskuja synnyttävä laite
US7694747B1 (en) * 2002-09-17 2010-04-13 American Piledriving Equipment, Inc. Preloaded drop hammer for driving piles
US20080296034A1 (en) * 2006-06-06 2008-12-04 Willy Braun Percussion Mechanism with a Striking Pin and an Associated Catching Mechanism
SE531337C2 (sv) * 2007-07-03 2009-02-24 Atlas Copco Constr Tools Ab Bränsledriven brytmaskin
JP5294826B2 (ja) * 2008-12-19 2013-09-18 株式会社マキタ 打撃工具
US8763719B2 (en) * 2010-01-06 2014-07-01 American Piledriving Equipment, Inc. Pile driving systems and methods employing preloaded drop hammer
US8939227B2 (en) * 2010-12-23 2015-01-27 Caterpillar Inc. Pressure protection valve for hydraulic tool
DE102012208855A1 (de) * 2012-05-25 2013-11-28 Robert Bosch Gmbh Handwerkzeugmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937286A (en) * 1974-05-13 1976-02-10 Wagner Carl F Fence post driver
JPS57169130A (en) * 1981-12-21 1982-10-18 Toyoda Kikai Kogyo Kk Drop hammer
JPS6088721A (ja) * 1983-10-21 1985-05-18 Nippon Air Brake Co Ltd 油圧式杭打機
JPH10212728A (ja) * 1997-01-29 1998-08-11 Nippon Sharyo Seizo Kaisha Ltd 建設機械の油圧回路
KR100932662B1 (ko) * 2008-10-17 2009-12-21 권태운 휴대용 말뚝 항타기

Also Published As

Publication number Publication date
AU2014275576A1 (en) 2016-01-28
US20160138238A1 (en) 2016-05-19

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