EP3904270B1 - Dispositif de levage et procédé d'extraction d'un mât ou d'un poteau ancré dans une fondation - Google Patents
Dispositif de levage et procédé d'extraction d'un mât ou d'un poteau ancré dans une fondation Download PDFInfo
- Publication number
- EP3904270B1 EP3904270B1 EP21165937.0A EP21165937A EP3904270B1 EP 3904270 B1 EP3904270 B1 EP 3904270B1 EP 21165937 A EP21165937 A EP 21165937A EP 3904270 B1 EP3904270 B1 EP 3904270B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lifting
- support
- mast
- lifting device
- guide
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 4
- 210000000078 claw Anatomy 0.000 claims description 25
- 239000004952 Polyamide Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229920002647 polyamide Polymers 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/36—Load-engaging elements
- B66F3/38—Load-engaging elements adjustable relative to piston
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/36—Load-engaging elements
Definitions
- the invention relates to a lifting device.
- Such lifting devices can be used, for example, to pull out a mast or a support anchored in a foundation.
- a conventional device provides for a chain to be looped around the mast or post, then the mast or post is extracted by vertical movement of a component of the device.
- this device can only be used for smaller masts or posts.
- the device includes a U-shaped bottom plate that is positioned to surround the mast. Hydraulic cylinders are supported on the floor surface, the pistons of which are each provided with an adhesive shell, the adhesive shells resting laterally on the mast. By extending the pistons of the hydraulic cylinders, the mast is lifted out of the ground.
- a lifting device for certain applications, for example for the dismantling of a gantry support, a cable car support or a bridge anchorage, a device is required which is able to pull out large and heavy masts or supports. So far, cranes have been used in most cases for this purpose. Supports of gantries often have so-called shear lugs, with which they are anchored in a foundation. Forces of the order of 100 t can occur when props with shear lugs are pulled out. When pulling out the support with a crane, it is often difficult to remove the support or pull out the mast with the required precision, which may result in damage to the foundation of the support or the mast.
- a lifting device according to the preamble of claim 1 is from document U.S. 2004/146387 A1 known.
- a device which is also suitable for extracting large and heavy poles or supports anchored in a foundation.
- a device is provided with the following features: a lifting cylinder having a piston, a vertically movable claw fixedly connected to the piston of the lifting cylinder, which can be positioned below an object to be lifted, a fixedly connected to the piston of the lifting cylinder, with respect to the direction of movement of the piston arranged oblique guide for a support element, which can be placed with a contact surface on the side of the object to be lifted, and an actuating element to move the support element along the guide.
- the device according to the invention makes it possible to lift a large and heavy object such as a support or a mast in a controlled manner and to pull it out of an anchorage.
- the lifting device according to the invention is positioned with its claw under the object to be lifted.
- the device according to the invention further comprises a support element which, with respect to the direction of movement of the piston, i. H. with respect to the vertical direction.
- the support element has a contact surface that can be placed laterally on the object to be lifted.
- the object to be lifted is laterally supported by the contact surface.
- This also supports the device according to the invention itself in order to prevent it from tipping towards the object to be lifted due to the off-centre introduction of force.
- the lifting device according to the invention also includes an actuating element in order to displace the support element along the guide. In this way, the contact surface can be individually adapted to the diameter and the outer contour of the object to be lifted and pulled out.
- the claw is guided in a carriage connected to the lifting cylinder and along the Slide is movable.
- the claw is a separate component that can be replaced if necessary. In this way, the claw can be adapted to the shape and outer contour of the object to be lifted.
- the claw preferably has an angled end section which forms a support for the object to be lifted. Accordingly, the claw can be positioned under an edge or a bottom plate of the object to be lifted and then lift the object.
- the claw is made from a highly tempered steel, preferably from the material 42CrMo5. This material is characterized by high strength and toughness. As a result, the claw can be built particularly narrow, so that it can also be used in confined spaces.
- a preferred variant of the invention provides that a plate is arranged on the upper side of the lifting cylinder, which is firmly connected to the guide for the support element and the carriage.
- the plate, guide and carriage enclose a triangular space.
- the actuating element for displacing the support element along the guide is designed as a hand wheel or as an electric motor.
- the support element is displaced along the guide by means of the actuating element until it bears against the outside of the object to be lifted.
- the support element facilitates a smooth, vertical lifting of the mast or support.
- the contact surface of the support element can consist of a plastic material.
- the contact surface is preferably made of polyamide (PA).
- the lifting cylinder can be actuated either manually or by means of an electric hydraulic unit or a hydraulic unit driven by an internal combustion engine.
- the invention relates to an arrangement comprising several, preferably two or four lifting devices of the type described with a central control device for separately controlling the pistons of the lifting cylinders.
- a lifting device according to the invention is suitable for manually lifting an object.
- Several such lifting devices can be controlled in a coordinated manner by means of the optionally available central control device.
- the invention also relates to a method for extracting a mast or a support anchored to a foundation.
- the method according to the invention comprises the following steps: arranging at least two lifting devices of the type described on opposite sides of the mast or support so that the claws are below a bottom plate of the mast or support, sliding the support elements of the lifting devices along the guides until the contact surfaces abut the side of the mast or support, extending the pistons of the lifting cylinders to raise the mast or support, and lifting the mast or support with a hoist such as a crane.
- the lifting device shown comprises a lifting cylinder 1 which has a piston 2 .
- the lifting cylinder 1 is accommodated in a box-shaped receptacle 3 .
- a horizontal plate 4 is fixed.
- a vertically arranged carriage 5 is firmly connected to the plate 4 .
- the carriage 5 has a rectangular cross section which surrounds a free space into which a claw 6 is inserted from the underside.
- the claw is made of highly tempered 42CrMo5 steel, which is extremely strong and tough.
- the claw 6 is connected to the carriage 5 via two transverse bolts (not shown), which pass through the through-holes 7 , 8 of the carriage 5 .
- the claw 6 comprises a first section 9 accommodated in the carriage 5 and a second, outer, angled section 10.
- the two sections 9, 10 form at least approximately a right angle.
- the outer section 10 of the claw 6 is used to lift the respective object.
- a guide 11 for a support element 13 is also firmly connected to the plate 4.
- the plate 4, the carriage 5 and the guide 11 enclose a triangular free space 12.
- the guide 11 has a rectangular cross section.
- Inside the guide 11 is the support element 13 which can be displaced along the guide 11 .
- the displacement takes place by means of an actuating element, which is designed as a handwheel 14 in this exemplary embodiment.
- the hand wheel 14 is coupled to a threaded rod 15 which is engaged with a nut 22 .
- the nut 22 is located at one end of the support member 13 which is movable along the guide 11.
- the support element 13 By turning the hand wheel 14, the support element 13 can be displaced in the longitudinal direction of the guide 11, as a result of which the outer end of the support element 13 can be extended or retracted.
- a contact surface 16 made of a plastic material.
- the contact surface 16 is made of polyamide (PA).
- PA polyamide
- the contact surface 16 is accommodated in a holder made of steel, which is connected in an articulated manner to the support element 13 via a joint 17 .
- the support element 13 is extended by means of the handwheel 14 until its contact surface 16 rests against the mast or support to be lifted. Due to the articulated mounting of the contact surface 16, it lies flat against the outside of the object to be lifted.
- the box-shaped receptacle 3 is additionally reinforced by a front panel 18 and diagonal side panels 19 .
- Each lifting device is positioned so that the claw 6 is located with its outer portion 10 below the object to be lifted.
- the outer section 10 of the claw 6 is positioned below a base plate 20 of a mast 21 . It may be necessary to remove the synthetic resin concrete or epoxy resin concrete below the base plate 20 so that the claw 6 can engage in the resulting gap. Then the mast 21 to be lifted can be lifted by means of the claw 6 acting on the base plate 20 .
- a total of four lifting devices are used to lift the object in this exemplary embodiment, with two lifting devices each being positioned next to one another on opposite sides.
- the handwheel 14 By turning the handwheel 14, the support element 13 is moved out of the guide 11 until its contact surface 16 is in contact with the outside of the mast 21.
- the piston 2 of the lifting cylinder 1 can be extended in a manner known per se by pumping movements of a rod (not shown).
- the four lifting devices are operated synchronously or in a controlled manner, so that the mast 21 is raised evenly. This precise lifting of the mast 21 allows it to be detached and lifted from it without major damage to the foundation.
- conventional methods on the other hand, there is the problem that the shear lugs present on the underside of the mast or the support severely damage the foundation when they are lifted. After lifting and detaching the mast 21 from the foundation, it can be lifted and removed with a crane.
- lifting devices that are coupled to a hydraulic power pack that generates the hydraulic pressure required for the operation of the lifting devices.
- the individual lifting devices connected to the hydraulic unit can be controlled separately by means of a corresponding control device.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Forklifts And Lifting Vehicles (AREA)
Claims (11)
- Dispositif de levage comprenant :- un vérin de levage (1) comportant un piston (2),- une griffe (6) pouvant se déplacer verticalement reliée de manière solidaire au piston (2) du vérin de levage (1), ladite griffe pouvant être positionnée au-dessous d'un objet qui doit être soulevé, caractérisé par- un guide (11) pour un élément de support (13) relié au piston (2) du vérin de levage (1), disposé de manière inclinée par rapport au sens de déplacement du piston (2), ledit élément de support pouvant être appliqué par une surface d'appui (16) latéralement contre l'objet à soulever, et- un élément d'actionnement pour déplacer l'élément de support (13) le long du guide (11).
- Dispositif de levage selon la revendication 1, en ce que la griffe (6) est guidée dans un chariot (5) relié au vérin de levage (1) et qu'elle peut être déplacée le long du chariot (5).
- Dispositif de levage selon la revendication 1 ou 2, en ce que la griffe (6) comporte une section finale (10) coudée formant un appui pour l'objet à soulever.
- Dispositif de levage selon l'une des revendications précédentes, en ce que la griffe (6) est réalisée en un acier hautement trempé et revenu, de préférence en matériau 42CrMo5.
- Dispositif de levage selon l'une des revendications 2 à 4, en ce qu'une plaque (4) est disposée sur le côté supérieur du vérin de levage (1), ladite plaque étant reliée de manière solidaire au guide (11) pour l'élément de support (13) et au chariot (5).
- Dispositif de levage selon la revendication 5, en ce que la plaque (4), le guide (11) et le chariot (5) forment un espace libre triangulaire.
- Dispositif de levage selon l'une des revendications précédentes, en ce que l'élément d'actionnement se présente sous forme de volant (14) ou sous forme de moteur électrique pour déplacer l'élément de support (13) le long du guide (11).
- Dispositif de levage selon l'une des revendications précédentes, en ce que la surface d'appui (16) de l'élément de support (13) se compose d'un matériau plastique, de préférence de polyamide (PA).
- Dispositif de levage selon l'une des revendications précédentes, en ce que le vérin de levage (1) peut être actionné manuellement ou à l'aide d'un groupe hydraulique à entraînement électrique ou entraîné par un moteur à combustion interne.
- Ensemble, comprenant plusieurs, de préférence deux ou quatre dispositifs de levage selon l'une des revendications 1 à 9, ayant un dispositif de commande centralisé destiné à la commande séparée des pistons (2) des vérins de levage (1).
- Procédé destiné à extraire un poteau (21) ou un pilier ancré dans une fondation, comprenant les étapes suivantes consistant à :- disposer au moins deux dispositifs de levage selon l'une des revendications 1 à 9 sur des côtés opposés du poteau (21) ou du pilier, de manière à ce que les griffes (6) soient au-dessous d'une plaque de base du poteau (21) ou du pilier,- déplacer les éléments de support (13) des dispositifs de levage le long des guides (11) jusqu'à ce que les surfaces d'appui (16) soient appliquées latéralement contre le poteau (21) ou le pilier,- sortir les pistons (2) des vérins de levage (1) pour soulever le poteau (21) ou le pilier, et- soulever le poteau (21) ou le pilier avec un engin de levage tel qu'une grue.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020110308.5A DE102020110308A1 (de) | 2020-04-15 | 2020-04-15 | Hubvorrichtung und Verfahren zum Herausziehen eines in einem Fundament verankerten Masts oder einer Stütze |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3904270A1 EP3904270A1 (fr) | 2021-11-03 |
EP3904270B1 true EP3904270B1 (fr) | 2023-02-08 |
Family
ID=75302341
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21165937.0A Active EP3904270B1 (fr) | 2020-04-15 | 2021-03-30 | Dispositif de levage et procédé d'extraction d'un mât ou d'un poteau ancré dans une fondation |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3904270B1 (fr) |
DE (2) | DE102020110308A1 (fr) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD57678A (fr) | ||||
US4354795A (en) | 1981-02-13 | 1982-10-19 | Dutra Jr Joseph G | Load stabilizer assembly with pivotal mount for a forklift truck |
DD262220B3 (de) | 1987-06-29 | 1993-04-22 | Joachim Thieme | Hubvorrichtung fuer niedrigstehende lasten |
US4822006A (en) | 1987-07-31 | 1989-04-18 | Mcintire Gary L | Pole pulling apparatus and method |
US6817827B2 (en) * | 2003-01-23 | 2004-11-16 | Frank Targonski | Lifting apparatus with stabilizer |
US20120153245A1 (en) * | 2010-12-20 | 2012-06-21 | Zloch David A | Furniture lifting device |
-
2020
- 2020-04-15 DE DE102020110308.5A patent/DE102020110308A1/de not_active Ceased
-
2021
- 2021-03-30 EP EP21165937.0A patent/EP3904270B1/fr active Active
- 2021-03-30 DE DE202021103797.0U patent/DE202021103797U1/de active Active
Also Published As
Publication number | Publication date |
---|---|
DE102020110308A1 (de) | 2021-10-21 |
EP3904270A1 (fr) | 2021-11-03 |
DE202021103797U1 (de) | 2021-08-03 |
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