EP0460755B1 - Sonnette hydraulique pour pieux - Google Patents
Sonnette hydraulique pour pieux 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
Definitions
- the present invention relates to a hydraulic control device for the falling weight of a pile driving installation.
- 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.
- control device 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.
- control device quickly breaks down.
- 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.
- 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.
- valve makes further conduits for transferring control signals unnecessary, so that the number of conduits is reduced.
- 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.
- a carrier 5 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.
- a hydraulic cylinder 7 wherein a piston 8 is arranged which is connected to the striker weight 11 by means of a piston rod 9 and a coupling 10.
- the control member 13 which takes a portable form, is connected to the aggregate 4 by means of a cable 14.
- the aggregate 4 is further connected to the control unit 6 by means of both a pressure conduit 15 and a pressureless 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 an expansion tank 18.
- This discharge side of the pump is further connected to a pressure control valve 19, which is also electrically controllable and then acts as short circuit valve, and an electrically controllable valve 20.
- the outlet side of the valve 19 is connected to a reservoir 21, while the outflow side of the valve 20 is connected to the pressure carrying conduit 15 and to the feed side of a second electrical valve 22.
- the discharge side of the second electrical valve 22 is connected via a channel to the reservoir 21, as is the pressureless channel 16.
- the control unit 6 arranged in the vicinity of the cylinder 7 comprises a pressure dependent automatic valve 23, the inflow side of which is connected to the pressure conduit 15 and the outflow side of which is connected to the lifting side of the cylinder 7, that is, the chamber of the cylinder 7 which is situated under the piston 8.
- the valve 23 closes the pressure conduit when the pressure in said conduit falls below a predetermined level.
- the outflow side of the valve 23 is further connected to a further pressure dependent automatic valve 24 and to the inflow side of a pressure control valve 25.
- the outflow side of both the automatic valve 24 and the pressure 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 a second expansion tank 26 which is otherwise connected to the pressureless conduit 16.
- fig. 3 shows how the piston rod 9 is connected to the striker weight 11 by means of a coupling 10.
- a bearing 27 Arranged on the underside of the piston rod 9 is a bearing 27 through which extends a pin 28.
- the pin 28 also extends through a sleeve 29 arranged concentrically relative to the underside of the piston rod 9, so that the sleeve 29 is rotatable round a horizontal axis relative to the piston rod 9.
- a rod 30 Arranged on the underside of the sleeve is a rod 30 which is connected to the sleeve 29 for example by welding.
- the rod is provided with a number of shoulders 31, 32, 33.
- the bottom part of the rod 30 extends inside a sleeve 34 which is closed off on both sides by covers 35, 36 through which the rod 30 extends.
- the space between the rod 30 and the sleeve 34 which is enclosed by the covers 35, 36 is occupied by a slightly elastic mass 38.
- This mass 38 transfers the forces acting in the vertical direction between the rod 30 and the sleeve 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.
- the sleeve 37 is further connected on its underside to the striker weight 11. On the left in fig. 3 can also be seen a part of the guiding of the striker weight 11. This guiding does not form any part of the present application and will not be discussed further.
- 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 the reservoir 21.
- the pressure 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 the reservoir 21.
- valves 20 and 22 are here closed. No pressure is thus created on the pressure conduit 15, so that the piston 8 remains in the cylinder 7 in its lowest position.
- the pressure control valve 25 otherwise serves the purpose of not allowing the pressure in the bottom chamber of the cylinder 7 to rise excessively; when a determined limit value is exceeded the pressure control valve 25 will partially open so that the pressure inside the cylinder 7 is compensated.
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)
Claims (7)
- Dispositif hydraulique de commande des déplacements verticaux de la masse de frappe (11) d'un appareil de battage de pieux, comprenant :- un vérin hydraulique (7) destiné à déplacer la masse de frappe (11),- une unité de commande (6) placée au voisinage du vérin (7),- une pompe (17) raccordée à l'unité de commande (6) par un conduit sous pression (15), et- un réservoir (21) raccordé à l'unité de commande par un conduit sans pression (16), la pompe (17) et le réservoir (21) étant placés à distance de l'unité de commande (6) et faisant partie d'un ensemble regroupé (4), l'unité de commande (6) comprenant une soupape (24) commandée par la pression du fluide hydraulique , dont le premier côté est raccordé au côté de soulèvement du vérin hydraulique (11) et au conduit sous pression et le second côté est raccordé au conduit sans pression,caractérisé en ce que la soupape, dont le fonctionnement dépend de la pression, est une soupape automatique (24) ayant des propriétés telles qu'elle se ferme automatiquement lorsque la pression est appliquée au conduit sous pression (15), et qu'elle s'ouvre automatiquement lorsque la pression disparaît dans le conduit sous pression (15).
- Dispositif hydraulique de commande selon la revendication 1, caractérisé en ce que le cylindre de levage (7) est à double effet, et le second côté de la soupape (24) est raccordé au côté de descente du vérin de levage (7).
- Dispositif hydraulique de commande selon la revendication 1 ou 2, caractérisé par une soupape automatique (23) dont le fonctionnement dépend de la pression et qui est placée dans l'unité de commande (6), cette soupape (23) étant raccordée entre le conduit sous pression (15) et la soupape (24), cette soupape (23) fermant automatiquement le conduit sous pression (15) lorsque la pression dans le conduit sous pression tombe au-dessous d'un niveau prédéterminé.
- Dispositif hydraulique de commande selon la revendication 1, 2 ou 3, caractérisé par un réservoir de dilatation (26) incorporé à l'unité de commande (6).
- Dispositif hydraulique de commande selon la revendication 1, 2, 3 ou 4, caractérisé en ce que les deux côtés du vérin de levage (7) sont mis en court-circuit par une soupape de limitation de pression (25).
- Dispositif hydraulique de commande selon l'une des revendications précédentes, caractérisé en ce que la masse de frappe (11) est raccordée au vérin hydraulique (7) par un accouplement légèrement élastique (10).
- Dispositif hydraulique de commande selon la revendication 6, caractérisé en ce que l'accouplement élastique est formé par un manchon (16) qui est raccordé à la masse de frappe (11) et dans lequel passe une tige (9) raccordée au piston (8) et qui est par ailleurs remplie d'une masse élastique.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL9001284A NL9001284A (nl) | 1990-06-07 | 1990-06-07 | Hydraulische hei-inrichting. |
NL9001284 | 1990-06-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0460755A1 EP0460755A1 (fr) | 1991-12-11 |
EP0460755B1 true EP0460755B1 (fr) | 1994-09-28 |
Family
ID=19857201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91201351A Expired - Lifetime EP0460755B1 (fr) | 1990-06-07 | 1991-06-03 | Sonnette hydraulique pour pieux |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0460755B1 (fr) |
AT (1) | ATE112346T1 (fr) |
DE (1) | DE69104268T2 (fr) |
DK (1) | DK0460755T3 (fr) |
ES (1) | ES2061159T3 (fr) |
NL (1) | NL9001284A (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5526885A (en) * | 1992-08-19 | 1996-06-18 | Aktsionernoe Obschestvo Zakrytogo Tipa "Rossiiskaya Patentovannaya Tekhnika" (Ropat) | Hydraulic device for driving piles |
CN103846904A (zh) * | 2012-11-30 | 2014-06-11 | 中国科学院沈阳自动化研究所 | 一种用于控制水下液压机械手的伺服阀箱 |
CN115450213B (zh) * | 2021-11-08 | 2023-07-21 | 湖北金满赢建设有限公司 | 一种具有防倾倒保护的自走式打桩机 |
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/nl not_active Application Discontinuation
-
1991
- 1991-06-03 DK DK91201351.3T patent/DK0460755T3/da active
- 1991-06-03 DE DE69104268T patent/DE69104268T2/de not_active Expired - Fee Related
- 1991-06-03 ES ES91201351T patent/ES2061159T3/es not_active Expired - Lifetime
- 1991-06-03 AT AT91201351T patent/ATE112346T1/de not_active IP Right Cessation
- 1991-06-03 EP EP91201351A patent/EP0460755B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE112346T1 (de) | 1994-10-15 |
EP0460755A1 (fr) | 1991-12-11 |
ES2061159T3 (es) | 1994-12-01 |
DE69104268T2 (de) | 1995-02-16 |
DE69104268D1 (de) | 1994-11-03 |
DK0460755T3 (da) | 1994-11-07 |
NL9001284A (nl) | 1992-01-02 |
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