EP4148014B1 - Dispositif de rentrée contrôlée d'un cylindre - Google Patents

Dispositif de rentrée contrôlée d'un cylindre Download PDF

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Publication number
EP4148014B1
EP4148014B1 EP22193809.5A EP22193809A EP4148014B1 EP 4148014 B1 EP4148014 B1 EP 4148014B1 EP 22193809 A EP22193809 A EP 22193809A EP 4148014 B1 EP4148014 B1 EP 4148014B1
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EP
European Patent Office
Prior art keywords
conduit
valve
chamber
cylinder
along
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
Application number
EP22193809.5A
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German (de)
English (en)
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EP4148014A1 (fr
Inventor
Alberto PEDRAZZI
Pierre Luigi Zaccarelli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP4148014A1 publication Critical patent/EP4148014A1/fr
Application granted granted Critical
Publication of EP4148014B1 publication Critical patent/EP4148014B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/54—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors
    • 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
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/22—Hydraulic devices or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/05—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/3058—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having additional valves for interconnecting the fluid chambers of a double-acting actuator, e.g. for regeneration mode or for floating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant throttles or orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
    • F15B2211/50581—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using counterbalance valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5153—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/75—Control of speed of the output member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/86—Control during or prevention of abnormal conditions
    • F15B2211/8613—Control during or prevention of abnormal conditions the abnormal condition being oscillations

Definitions

  • the present invention relates to a device for controlled re-entry of a cylinder, specifically for controlled re-entry of a crane cylinder.
  • the present invention concerns a particularly inventive system for solving a technical problem concerning the re-entry of a crane.
  • the purpose of the present invention is precisely to go and provide a device that makes it possible to achieve high cylinder control under all conditions and even at particularly low speeds, as required in some particular applications.
  • DE 10 2012 220863 A1 discloses the preamble of claim 1.
  • the present invention relates to a control system according to the features listed in claim 1.
  • Figure 1 shows a schematic view of a device for moving a cylinder according to a particular embodiment of the present invention.
  • the control device for displacing a load according to the present invention is preferably used in a power circuit for a hydraulic cylinder intended to determine the displacement of a load.
  • Figure 1 shows the device according to the present invention used for controlled return of a cylinder.
  • the C cylinder typically has two chambers C1, C2 separated by a plunger to which is associated the rod that, in various ways, is connected to the load to be moved.
  • a first C1 chamber typically the chamber that is located on the piston rod side of the cylinder, is intended to receive pressurized oil to determine cylinder retraction.
  • a distributor D is arranged to determine the supply of pressurized oil to the first chamber C1 or the second chamber C2 and, at the same time, to connect the chamber that is not supplied by pressurized oil with an outlet.
  • the distributor D is equipped with a drawer that can assume a first position, in which the first chamber C1 is placed in communication with a source of pressurized fluid from a pump P and the second chamber C2 is placed in communication with an outlet T.
  • This first position is schematized on the left side of the distributor D.
  • the drawer can also assume a second position, schematized on the right side of the distributor, in which opposite connections to those in the first position are made.
  • the drawer can also assume a central position in which the first and second chambers C1, C2 are not in communication with the pressurized fluid source P.
  • the control device includes a first conduit 20 arranged to connect the first chamber C1 of the cylinder C with the distributor D.
  • a second conduit 30, on the other hand, is arranged to connect the second chamber C2 of the cylinder C with the distributor D.
  • the first valve 6 is configured so that it can allow fluid flow from the D distributor to the first C1 chamber and to prevent fluid flow from the first C1 chamber to the D distributor.
  • a second valve 1 which is specifically a balancing valve, is arranged along the second conduit 30, and is arranged to assume a closing configuration, in which it prevents fluid flow along the second conduit 30, and an opening configuration, in which it allows fluid flow along the second conduit 30, only when driven by a pilot pressure greater than a predetermined value.
  • pilot conduit 40 For piloting the second valve 1, there is a piloting conduit 40, which connects the second valve 1 with the first conduit 20.
  • Said pilot conduit 40 is configured to allow a pilot pressure from the first conduit 20 to reach said second valve 1 and drive it open.
  • the pilot conduit 40 connects the second valve 1 with the first conduit 20 at a position of said first conduit 2 between the first valve 6 and the distributor D.
  • a valve 12 Parallel to said second valve 1 is a valve 12, preferably a one-way valve, which is configured to allow flow from said distributor D to said second chamber C2 and to prevent reverse flow.
  • a choke 7 (which is any type of orifice) is positioned along the piloting conduit 40.
  • the device according to the present invention further includes a third conduit 50 that connects a portion of the pilot conduit 40 between the bottleneck 7 and the second valve 1 to a portion of said second conduit 30 between the second valve 1 and the second chamber C2.
  • a third valve 11 (which is preferably a unidirectional valve) that is configured to allow a flow of fluid from the first conduit 20 to the second conduit 30 passing through the choke 7 and to prevent flow in the opposite direction.
  • the device shown in the figure further includes a bottleneck 8 positioned along the third duct 50 between the third valve 11 and the pilot duct 40.
  • a bottleneck 8 positioned along the third duct 50 between the third valve 11 and the pilot duct 40.
  • the opening of the two constrictions is the same.
  • the third valve 11 and the choke are presented as two separate and distinct elements and having a precise order of placement along the third duct 50.
  • the order of the two elements along the third duct can be reversed and that these elements can be integrated together into a single valve having a choke without departing from the scope of protection defined by the claims.
  • the device shown in the figure further comprises a regeneration system.
  • a regeneration system includes a fourth conduit 60 connecting the first conduit 20 (specifically a portion between the first valve 6 and the first chamber C1) to the second conduit 30 (specifically a portion between the second valve 1 and the second chamber C2).
  • a valve system 2, 5 which is configured to allow a flow of fluid from the second conduit 20 and directed to the third conduit in the event that the pressure along said second conduit 30 exceeds a predetermined value and to prevent the opposite flow.
  • a valve system includes a balancing valve 2 and a one-way valve 5.
  • Unidirectional valve 5 is configured to allow a flow of fluid from the second conduit 20 and directed to the third conduit 30 and to prevent reverse flow.
  • balancing valve 2 is configured to allow a flow along the fourth duct when the pressure along said second duct 30 exceeds a predetermined value. This pressure is supplied to the balancing valve 2 via a pilot line 90 that reaches the balancing valve and comes from a portion of the second conduit 30 between the second valve 1 and the distributor D.
  • the balancing valve 2 also receives pressure from a portion of the first conduit 20 between the first valve 6 and the distributor D through a pilot conduit 80.
  • a regeneration system bypass system may be included.
  • Such a bypass system preferably comprises a conduit 70 connecting a portion of the fourth conduit 60 lying between the balancing valve 2 and the one-way valve 5 to a portion of the first conduit lying between the first valve 6 and the distributor D.
  • a valve 4 for opening and closing a flow along said conduit 70 respectively as a result of a command and preferably an uncompensated control valve 3.
  • the control valve When a re-entry of cylinder C, i.e., a displacement of the plunger to the right, is required, the control valve is moved to the left position so that pressure is supplied to the first chamber C1 through the first conduit 20. The pressure then goes to chamber C1 via the first conduit 20 and the first valve 6. However, at this point the discharge from the second chamber C2 is still closed because balancing valve 1 is still in the closed position. However, the pressure present on the first duct 20 reaches the second chamber C2 by passing through the first and second throttles 7, 8 and the one-way valve 11.
  • valve 1 Because of the passage of oil through valve 1 will occur that a passage of oil through duct 50 to the second duct 30 will begin. This passage of oil will then cause a decrease in pressure along pilot port 40 at valve 1. However, this decrease in pressure is very "slight" due to the fact that the amount of oil flowing from pilot port 40 to the second port 30 is limited by the presence of restriction 8, which allows a pressure difference to go between upstream and downstream of restriction 8. Because of this slight reduction in pressure it will be the case that an equilibrium situation will be created in which the balancing valve 1 is open with a minimum opening, which allows cylinder C to re-enter at a substantially constant and particularly reduced speed.
  • balancing valve 1 will continue to open and close due to the fact that, even if the flow rate at the inlet of the first chamber C1 is small, the flow rate at the outlet of the second chamber C2 will still be larger and will go to decrease the pressure along the first duct 20 and consequently to cause the balancing valve 1 to close, thus generating a reiteration of the process described here and thus a "jerky" displacement.
  • cylinder re-entry can occur at a speed of less than 2 mm/s and, for example, re-enter about 10 cm in 15 minutes.
  • the inventive character of the present invention is concentrated in the presence of this third duct. Thanks to this duct, it is possible to make the cylinder re-enter at a constant and completely contained speed.
  • Such a cylinder may preferably be a cylinder configured for moving a crane whose axis is perpendicular to the force of gravity acting on the load moved by the crane.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Geology (AREA)
  • Civil Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Transplanting Machines (AREA)
  • Vehicle Body Suspensions (AREA)
  • Eye Examination Apparatus (AREA)

Claims (11)

  1. Dispositif de commande de déplacement d'une charge, comprenant :
    un premier conduit (20), conçu pour être propre à raccorder une première chambre (C1) d'un vérin (C) avec un distributeur (D) ; un deuxième conduit (30), conçu pour être propre à raccorder une seconde chambre (C2) du vérin (C) avec le distributeur (D) ;
    une première vanne (6), placée le long du premier conduit (20), qui est conçue pour être propre à permettre l'écoulement de fluide depuis le distributeur (D) vers la première chambre (C1) et à empêcher l'écoulement de fluide depuis la première chambre (C1) vers le distributeur (D) ;
    une deuxième vanne (1), placée le long du deuxième conduit (30), qui est conçue pour adopter une configuration fermée, dans laquelle elle empêche l'écoulement de fluide le long du deuxième conduit (30), et une configuration ouverte, dans laquelle elle permet l'écoulement de fluide le long du deuxième conduit (30), uniquement si elle est pilotée par une pression de pilotage supérieure à une valeur prédéterminée ;
    un conduit de pilotage (40), qui raccorde la deuxième vanne (1) avec le premier conduit (20) et conçu pour permettre à une pression de pilotage d'atteindre ladite deuxième vanne (1) ;
    de pilotage (40) à une partie dudit deuxième conduit (30), caractérisé en ce que ladite partie dudit deuxième conduit est située entre ladite deuxième vanne (1) et ladite seconde chambre (C2) et par le fait qu'une troisième vanne (11) est placée le long dudit troisième conduit (50), celle-ci étant conçue pour permettre un écoulement de fluide dudit premier conduit (20) audit deuxième conduit (30) et pour empêcher l'écoulement inverse, et qu'un premier orifice (8) est placé le long dudit troisième conduit (50) entre ladite troisième vanne (11) et ledit conduit de pilotage (40).
  2. Dispositif selon la revendication 1, ledit dispositif comprenant, en outre, un second orifice (7) placé le long dudit conduit de pilotage (40) entre ledit deuxième conduit (20) et le raccord entre ledit conduit de pilotage (40) et ledit troisième conduit (50).
  3. Dispositif selon la revendication 2, dans lequel l'ouverture du premier orifice (8) est égale à l'ouverture du second orifice (7).
  4. Dispositif selon l'une des revendications précédentes, dans lequel ledit conduit de pilotage (40) raccorde la deuxième vanne (1) avec le premier conduit (20) à un emplacement dudit premier conduit (20) situé entre la première vanne (6) et le distributeur (D).
  5. Dispositif selon l'une des revendications précédentes, dans lequel ladite première vanne (6) est un clapet de non-retour et/ou dans lequel ladite deuxième vanne (1) est une vanne d'équilibrage, et/ou dans lequel ladite troisième vanne (11) est un clapet de non-retour.
  6. Dispositif selon l'une des revendications précédentes, ledit dispositif comprenant, en outre, un système de régénération, ledit système comprenant un quatrième conduit (60) qui raccorde ledit premier conduit (20) audit deuxième conduit (30), ledit système comprenant un système de vannes (2, 5) placé le long dudit quatrième conduit (60) et conçu pour permettre un écoulement de fluide depuis ledit deuxième conduit (20) vers ledit troisième conduit, si la pression le long dudit deuxième conduit (30) dépasse une valeur prédéterminée et pour empêcher l'écoulement inverse.
  7. Dispositif selon l'une des revendications précédentes, dans lequel une vanne (12) est placée parallèlement à ladite deuxième vanne (1) et est conçue pour permettre un écoulement depuis ledit distributeur (D) vers ladite deuxième chambre (C2) et pour empêcher l'écoulement inverse.
  8. Dispositif selon l'une des revendications précédentes, ledit dispositif comprenant, en outre, ledit vérin (C), dans lequel ladite première chambre (C1) est la chambre de la tige dudit vérin et ladite seconde chambre (C2) est la chambre du fond dudit vérin.
  9. Dispositif selon la revendication 8, dans lequel ledit vérin (C) est conçu pour être propre à déplacer une charge le long d'une direction perpendiculaire à la force gravitationnelle agissant sur ladite charge.
  10. Utilisation d'un dispositif selon l'une quelconque des revendications 1 à 9, dans laquelle ledit dispositif est utilisé dans une grue pour le déplacement horizontal d'une charge.
  11. Utilisation selon la revendication 10, dans laquelle la charge est déplacée à une vitesse inférieure à 2 mm/s.
EP22193809.5A 2021-09-13 2022-09-05 Dispositif de rentrée contrôlée d'un cylindre Active EP4148014B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102021000023543A IT202100023543A1 (it) 2021-09-13 2021-09-13 Dispositivo per il rientro controllato di un cilindro

Publications (2)

Publication Number Publication Date
EP4148014A1 EP4148014A1 (fr) 2023-03-15
EP4148014B1 true EP4148014B1 (fr) 2024-01-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22193809.5A Active EP4148014B1 (fr) 2021-09-13 2022-09-05 Dispositif de rentrée contrôlée d'un cylindre

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EP (1) EP4148014B1 (fr)
IT (1) IT202100023543A1 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012220863A1 (de) * 2012-11-15 2014-05-15 Robert Bosch Gmbh Steueranordnung
EP3862576A1 (fr) * 2020-02-10 2021-08-11 Robert Bosch GmbH Système de commande d'un cylindre d'actionnement d'une grue

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IT202100023543A1 (it) 2023-03-13
EP4148014A1 (fr) 2023-03-15

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