EP0460755B1 - Hydraulic pile-driver - Google Patents
Hydraulic pile-driver Download PDFInfo
- Publication number
- EP0460755B1 EP0460755B1 EP91201351A EP91201351A EP0460755B1 EP 0460755 B1 EP0460755 B1 EP 0460755B1 EP 91201351 A EP91201351 A EP 91201351A EP 91201351 A EP91201351 A EP 91201351A EP 0460755 B1 EP0460755 B1 EP 0460755B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- control unit
- valve
- conduit
- hydraulic
- 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
Links
Images
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
Landscapes
- 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)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Fluid-Pressure Circuits (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
Description
- The present invention relates to a hydraulic control device for the falling weight of a pile driving installation.
- These hydraulic control devices are generally known.
- In a known hydraulic control device (DE-A-2225397), the control device is arranged for the greater part in the vicinity of the hydraulic lifting cylinder for the falling weight or striker weight, and therefore in the vicinity of the striker weight. Since the striker weight is initially situated high in the piling frame and slowly moves downward during further driving of the pile into the ground, the hydraulic cylinder for driving the striker weight will likewise move downward during the course of the pile driving process.
- When, as with this known device, the control device is situated substantially in the vicinity of the striker weight, this control device will likewise be slowly moved downward during the pile driving process. This control device is moreover subjected to the vibrations and shocks usually prevailing in the upper part of the piling frame as a result of the pile driving.
- The consequence thereof is that the control device quickly breaks down.
- Apart from the normal conduits for feed and discharge of hydraulic liquids, further lines, for example electrical, are, however, necessary for transferring control signals for remote control of this control device. In the context of the often rugged surroundings in which pile-driving operations take place and the usually great distance between the control installation and the person controlling the pile-driving device, it is not inconceivable for the control conduits to be damaged.
- GB-A-847780 describes a hydraulic control device for the vertical movements of the striker weight of a pile driver, comprising: a hydraulic cylinder for driving the striker weight; a control unit located in the vicinity of the cylinder; a pump connected to the control unit via a pressure conduit; and a reservoir connected to the control unit via a pressureless conduit, the pump and the reservoir being arranged at a distance from the control unit and forming a part of an aggregate, wherein the control unit comprises a pressure dependent valve actuated by the pressure of the hydraulic fluid, of which the first side is connected to the lifting side of the hydraulic cylinder and to the pressure conduit, and the second side is connected to the pressureless conduit.
- This known control device needs three different conduits for connecting the control unit with the aggregate comprising the pump and the reservoir.
- The aim of the present invention is to provide such an apparatus wherein the above stated drawbacks are avoided.
- This aim is reached in that the pressure dependent valve is an automatic valve having such properties, that it closes automatically, when pressure is applied to the pressure conduit, and that it opens automatically, when the pressure in the pressure conduit falls away.
- The automatic action of the valve makes further conduits for transferring control signals unnecessary, so that the number of conduits is reduced. By placing said valve in the control unit such, that, when pressure is applied, this pressure is directly supplied to the lifting side of the piston, the piston will cause the striker weight to move upward. The valve then keeps the discharge closed.
- When the pressure in the pressure conduit falls away, the valve will open, so that the hydraulic liquid, then present in the lifting side of the cylinder, can flow away via the valve, and the striker weight can fall down with as much free fall as possible, so that an optimal strike on the pile is obtained. Experience has in any case shown that the operation of a striker weight is optimal with as much free fall as possible.
- The present invention will be further elucidated with reference to the annexed figures, in which:
- Fig. 1 shows a schematic sectional view of a pile driver, wherein the control device according to the present invention is used;
- Fig. 2 shows a diagram of an embodiment of the control device according to the present invention; and
- Fig. 3 shows a sectional view of the fixing of the piston rod of the device according to the present invention to the striker weight.
- Fig. 1 shows a piling frame 1 which is secured by means of wires 2. The piling frame rests on a
ground plate 3 on which is mounted an aggregate 4. Arranged in the top of the piling frame is a carrier 5 which is movable along the piling frame by means of means not shown here and on which a control box 6 is arranged. - On the other side of the carrier is attached a
hydraulic cylinder 7 wherein a piston 8 is arranged which is connected to thestriker weight 11 by means of apiston rod 9 and acoupling 10. In the situation as drawn the striker weight rests on apile 12 to be driven. Thecontrol member 13, which takes a portable form, is connected to the aggregate 4 by means of acable 14. - The aggregate 4 is further connected to the control unit 6 by means of both a
pressure conduit 15 and apressureless conduit 16. The diagram of fig. 2 shows how a pump 17 is incorporated in the aggregate 4, the discharge side of which pump is connected to anexpansion tank 18. This discharge side of the pump is further connected to apressure control valve 19, which is also electrically controllable and then acts as short circuit valve, and an electricallycontrollable valve 20. The outlet side of thevalve 19 is connected to areservoir 21, while the outflow side of thevalve 20 is connected to thepressure carrying conduit 15 and to the feed side of a secondelectrical valve 22. The discharge side of the secondelectrical valve 22 is connected via a channel to thereservoir 21, as is thepressureless channel 16. The control unit 6 arranged in the vicinity of thecylinder 7 comprises a pressure dependentautomatic valve 23, the inflow side of which is connected to thepressure conduit 15 and the outflow side of which is connected to the lifting side of thecylinder 7, that is, the chamber of thecylinder 7 which is situated under the piston 8. Thevalve 23 closes the pressure conduit when the pressure in said conduit falls below a predetermined level. The outflow side of thevalve 23 is further connected to a further pressure dependentautomatic valve 24 and to the inflow side of apressure control valve 25. The outflow side of both theautomatic valve 24 and thepressure control valve 25 is connected to the descent side of the hydraulic cylinder, that is, the chamber located above the piston 8. This side is also connected to asecond expansion tank 26 which is otherwise connected to thepressureless conduit 16. - Finally, fig. 3 shows how the
piston rod 9 is connected to thestriker weight 11 by means of acoupling 10. Arranged on the underside of thepiston rod 9 is a bearing 27 through which extends apin 28. Thepin 28 also extends through asleeve 29 arranged concentrically relative to the underside of thepiston rod 9, so that thesleeve 29 is rotatable round a horizontal axis relative to thepiston rod 9. Arranged on the underside of the sleeve is arod 30 which is connected to thesleeve 29 for example by welding. The rod is provided with a number ofshoulders - The bottom part of the
rod 30 extends inside asleeve 34 which is closed off on both sides by covers 35, 36 through which therod 30 extends. The space between therod 30 and thesleeve 34 which is enclosed by thecovers elastic mass 38. Thismass 38 transfers the forces acting in the vertical direction between therod 30 and thesleeve 34 so that a slightly elastic coupling is obtained, wherein due to the properties of the slightly elastic material a certain damping is obtained which has the effect of improving the service life of the various components. Thesleeve 37 is further connected on its underside to thestriker weight 11. On the left in fig. 3 can also be seen a part of the guiding of thestriker weight 11. This guiding does not form any part of the present application and will not be discussed further. - The operation of the device according to the present invention will now be described.
- For the pile-driving, a pressure will first have to be built up in the
expansion tank 18 by means of the pump 17. The pump 17 obtains its hydraulic liquid from thereservoir 21. In the neutral position in which pile driving does not take place thepressure control valve 19 is open so that through the throttle action of this valve the pressure built up by the pump 17 is throttled and only a small amount of liquid flows through the valve to thereservoir 21. - The
valves pressure conduit 15, so that the piston 8 remains in thecylinder 7 in its lowest position. - When the operator wants to perform a stroke with the pile-driver, he will close the
pressure control valve 19 and open the electro-magnetically controlledvalve 20 using the electrical remote control. The liquid present in theconduit 15 thus comes under pressure wherein theautomatic valve 23 is opened by the action of the pressure and the hydraulic liquid flows through thevalve 23 to the bottom chamber of the lifting cylinder 8 and thestriker weight 11 is moved upward. The liquid situated in the top chamber is herein pressed away to theexpansion tank 26 and to thepressureless conduit 16, via which conduit the liquid finally arrives in thereservoir 21. During this operation thevalves - This process is continued until the operator closes the
valve 20 by means of the remote control and the pressure built up by the pump 17 is collected in theexpansion tank 18. As a result thereof thepressure conduit 15 becomes pressureless whereby thevalve 24 is opened and the liquid present in the bottom chamber of thecylinder 7 flows to the top chamber via thevalve 24. The striker weight can thus fall freely. Thepressure control valve 25 otherwise serves the purpose of not allowing the pressure in the bottom chamber of thecylinder 7 to rise excessively; when a determined limit value is exceeded thepressure control valve 25 will partially open so that the pressure inside thecylinder 7 is compensated.
Claims (7)
- Hydraulic control device for the vertical movements of the striker weight (11) of a pile driver, comprising:- a hydraulic cylinder (7) for driving the striker weight (11);- a control unit (6) located in the vicinity of the cylinder (7);- a pump (17) connected to the control unit (6) via a pressure conduit (15); and- a reservoir (21) connected to the control unit via a pressureless conduit (16), the pump (17) and the reservoir (21) being arranged at a distance from the control unit (6) and forming a part of an aggregrate (4), wherein the control unit (6) comprises a pressure dependent valve (24) actuated by the pressure of the hydraulic fluid, of which the first side is connected to the lifting side of the hydraulic cylinder (11) and to the pressure conduit, and the second side is connected to the pressureless conduit,characterized in that the pressure dependent valve is an automatic valve (24) having such properties, that it closes automatically, when pressure is applied to the pressure conduit (15), and that it opens automatically, when the pressure in the pressure conduit (15) falls away.
- Hydraulic control device according to claim 1, characterized in that the lifting cylinder (7) is double acting and that the second side of the valve (24) is connected to the lowering side of the lifting cylinder (7).
- Hydraulic control device according to claim 1 or 2, characterized by a pressure dependent automatic valve (23) arranged in the control unit (6), which valve (23) is connected between the pressure conduit (15) and the valve (24), which valve (23) closes automatically the pressure conduit (15),when the pressure in said pressure conduit falls below a predetermined level.
- Hydraulic control device according to claim 1, 2 or 3, characterized by a expansion tank (26) incorporated in the control unit (6).
- Hydraulic control device according to claim 1, 2, 3 or 4, characterized in that both sides of the lifting cylinder (7) are short circuited by a pressure limiting valve (25).
- Hydraulic control device according to one of the preceding claims, characterized in that the striker weight (11) is connected to the hydraulic cylinder (7) by means of a slightly elastic coupling (10).
- Hydraulic control device according to claim 6, characterized in that the elastic coupling is formed by a sleeve (16) which is connected to that striker weight (11) and wherein a rod (9) connected to the piston (8) extends and which is otherwise filled with an elastic mass.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL9001284 | 1990-06-07 | ||
NL9001284A NL9001284A (en) | 1990-06-07 | 1990-06-07 | HYDRAULIC PILING EQUIPMENT. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0460755A1 EP0460755A1 (en) | 1991-12-11 |
EP0460755B1 true EP0460755B1 (en) | 1994-09-28 |
Family
ID=19857201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91201351A Expired - Lifetime EP0460755B1 (en) | 1990-06-07 | 1991-06-03 | Hydraulic pile-driver |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0460755B1 (en) |
AT (1) | ATE112346T1 (en) |
DE (1) | DE69104268T2 (en) |
DK (1) | DK0460755T3 (en) |
ES (1) | ES2061159T3 (en) |
NL (1) | NL9001284A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994004762A1 (en) * | 1992-08-19 | 1994-03-03 | Aktsionernoe Obschestvo Zakrytogo Tipa 'rossiiskaya Patentovannaya Tekhnika' (Ropat) | Hydraulic pile driver |
CN103846904A (en) * | 2012-11-30 | 2014-06-11 | 中国科学院沈阳自动化研究所 | Servo valve box for controlling underwater hydraulic manipulator |
CN115450213B (en) * | 2021-11-08 | 2023-07-21 | 湖北金满赢建设有限公司 | Self-propelled pile driver with prevent empting protection |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB847780A (en) * | 1958-04-24 | 1960-09-14 | Maurice Auberger | Hydraulic control for battering rams and the like |
US3446293A (en) * | 1966-12-28 | 1969-05-27 | American Drilling & Boring Co | Pile driver |
-
1990
- 1990-06-07 NL NL9001284A patent/NL9001284A/en not_active Application Discontinuation
-
1991
- 1991-06-03 AT AT91201351T patent/ATE112346T1/en not_active IP Right Cessation
- 1991-06-03 DK DK91201351.3T patent/DK0460755T3/en active
- 1991-06-03 EP EP91201351A patent/EP0460755B1/en not_active Expired - Lifetime
- 1991-06-03 ES ES91201351T patent/ES2061159T3/en not_active Expired - Lifetime
- 1991-06-03 DE DE69104268T patent/DE69104268T2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ES2061159T3 (en) | 1994-12-01 |
EP0460755A1 (en) | 1991-12-11 |
DE69104268D1 (en) | 1994-11-03 |
DE69104268T2 (en) | 1995-02-16 |
DK0460755T3 (en) | 1994-11-07 |
NL9001284A (en) | 1992-01-02 |
ATE112346T1 (en) | 1994-10-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2016204003B2 (en) | Deep water pile driver | |
US4479550A (en) | Submerging ramming arrangement | |
EP0947294B1 (en) | Hydraulically operated impact device | |
JPS6365773B2 (en) | ||
US5256003A (en) | Method for automatically driving gravel drain piles and execution apparatus therefor | |
EP0460755B1 (en) | Hydraulic pile-driver | |
NL8202224A (en) | HYDRAULICALLY OPERATING PILING DEVICE. | |
US4414808A (en) | Hydraulic actuator for well pumps | |
US8313077B2 (en) | Shaker deck adjustment apparatus | |
US3442338A (en) | Hydraulic circuit for mobile hydraulic hammer | |
US3949496A (en) | Wave compensating system for suction dredgers | |
EP0567698B1 (en) | Input apparatus | |
US4149382A (en) | Hydraulic elevator power assembly | |
US4174663A (en) | Safety system for hydraulic vertical press | |
JP3238564B2 (en) | Hydraulic control device for tractor | |
GB2323620A (en) | Jack-up platform with storage tank and method for installing such a jack-up platform | |
SU1605046A1 (en) | Hydraulic drive protection system | |
JPH0320342Y2 (en) | ||
SU1336976A1 (en) | Apparatus for automatic adjustment of cutting height for harvesting machine | |
SU1643670A1 (en) | Shovel with change working implement | |
SU1663111A1 (en) | Vacuum drainage system | |
JPH10331157A (en) | Hydraulic drop hammer | |
SU729309A1 (en) | Pile-driving equipment | |
KR19980087895A (en) | Hydraulics for Lift | |
JPS6263717A (en) | Sand pile-driving ship |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19920415 |
|
17Q | First examination report despatched |
Effective date: 19920601 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
REF | Corresponds to: |
Ref document number: 112346 Country of ref document: AT Date of ref document: 19941015 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 69104268 Country of ref document: DE Date of ref document: 19941103 |
|
REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2061159 Country of ref document: ES Kind code of ref document: T3 |
|
ET | Fr: translation filed | ||
ITF | It: translation for a ep patent filed |
Owner name: STUDIO INGG. FISCHETTI & WEBER |
|
EAL | Se: european patent in force in sweden |
Ref document number: 91201351.3 |
|
REG | Reference to a national code |
Ref country code: GR Ref legal event code: FG4A Free format text: 3014456 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19950629 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19950630 Year of fee payment: 5 Ref country code: ES Payment date: 19950630 Year of fee payment: 5 Ref country code: DE Payment date: 19950630 Year of fee payment: 5 Ref country code: AT Payment date: 19950630 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19950710 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GR Payment date: 19950718 Year of fee payment: 5 Ref country code: BE Payment date: 19950718 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19950728 Year of fee payment: 5 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DK Payment date: 19950731 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19950807 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 19950901 Year of fee payment: 5 |
|
26N | No opposition filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19960603 Ref country code: GB Effective date: 19960603 Ref country code: DK Effective date: 19960603 Ref country code: AT Effective date: 19960603 |
|
REG | Reference to a national code |
Ref country code: DK Ref legal event code: EBP |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19960604 Ref country code: ES Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 19960604 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19960630 Ref country code: CH Effective date: 19960630 Ref country code: BE Effective date: 19960630 |
|
BERE | Be: lapsed |
Owner name: HOLDING A. BAARS AZN B.V. Effective date: 19960630 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19961231 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19970101 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19960603 |
|
REG | Reference to a national code |
Ref country code: GR Ref legal event code: MM2A Free format text: 3014456 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19970228 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19970301 |
|
EUG | Se: european patent has lapsed |
Ref document number: 91201351.3 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 19970101 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 19990601 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050603 |