IT1248792B - HYDRAULIC CIRCUIT FOR LIFTS, LIFTS AND SIMILAR, WITH INTRINSIC SAFETY - Google Patents

HYDRAULIC CIRCUIT FOR LIFTS, LIFTS AND SIMILAR, WITH INTRINSIC SAFETY

Info

Publication number
IT1248792B
IT1248792B ITMI911374A ITMI911374A IT1248792B IT 1248792 B IT1248792 B IT 1248792B IT MI911374 A ITMI911374 A IT MI911374A IT MI911374 A ITMI911374 A IT MI911374A IT 1248792 B IT1248792 B IT 1248792B
Authority
IT
Italy
Prior art keywords
lifts
circuit
valve
pressure
hydraulic circuit
Prior art date
Application number
ITMI911374A
Other languages
Italian (it)
Inventor
Angelo Martini
Original Assignee
Gmv Martini Spa
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 Gmv Martini Spa filed Critical Gmv Martini Spa
Priority to ITMI911374A priority Critical patent/IT1248792B/en
Publication of ITMI911374A0 publication Critical patent/ITMI911374A0/en
Priority to ES92108202T priority patent/ES2082272T3/en
Priority to DE69207065T priority patent/DE69207065T2/en
Priority to EP92108202A priority patent/EP0514782B1/en
Priority to DK92108202.0T priority patent/DK0514782T3/en
Priority to AT92108202T priority patent/ATE132112T1/en
Publication of ITMI911374A1 publication Critical patent/ITMI911374A1/en
Application granted granted Critical
Publication of IT1248792B publication Critical patent/IT1248792B/en
Priority to GR960400428T priority patent/GR3019026T3/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
    • B66B1/36—Means for stopping the cars, cages, or skips at predetermined levels
    • B66B1/40—Means for stopping the cars, cages, or skips at predetermined levels and for correct levelling at landings
    • B66B1/405—Means for stopping the cars, cages, or skips at predetermined levels and for correct levelling at landings for hydraulically actuated elevators

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Elevator Control (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

In un circuito idraulico per ascensori la valvola magnetica di avviamento è comandata elettricamente durante la discesa dell'impianto e non sostenta la valvola di sovrappressione che rimane chiusa in assenza di specifico comando. In caso di guasto, la valvola di sovrappressione si chiude a seguito del comando elettrico di fermata ed impedisce che la cabina termini in fossa per gravità. Una variante del circuito prevede che il segnale di pressione venga rilevato in una zona del circuito che si trova in pressione solo durante la salita dell'impianto. Ulteriore variante prevede l'adozione di una valvola atta a chiudere il passaggio del fluido in un settore del circuito ed a disattivare il funzionamento della valvola di pilotaggio nelle fasi statica e di discesa.Ulteriore variante prevede l'adozione di un pressostato atto ad inviare un segnale elettrico al quadro di comando in presenza di una pressione diversa da zero.In a hydraulic circuit for lifts, the magnetic starter valve is electrically controlled during the descent of the system and does not support the overpressure valve which remains closed in the absence of a specific command. In case of failure, the overpressure valve closes following the electric stop command and prevents the cabin from ending up in the pit by gravity. A variant of the circuit provides that the pressure signal is detected in an area of the circuit that is under pressure only during the ascent of the system. Another variant provides for the adoption of a valve designed to close the passage of the fluid in a sector of the circuit and to deactivate the operation of the pilot valve in the static and descent phases. Another variant provides for the adoption of a pressure switch designed to send a electrical signal to the control panel in the presence of a pressure other than zero.

ITMI911374A 1991-05-20 1991-05-20 HYDRAULIC CIRCUIT FOR LIFTS, LIFTS AND SIMILAR, WITH INTRINSIC SAFETY IT1248792B (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
ITMI911374A IT1248792B (en) 1991-05-20 1991-05-20 HYDRAULIC CIRCUIT FOR LIFTS, LIFTS AND SIMILAR, WITH INTRINSIC SAFETY
ES92108202T ES2082272T3 (en) 1991-05-20 1992-05-14 HYDRAULIC CIRCUIT FOR ELEVATORS OF PERSONS AND OF GOODS AND THE LIKE.
DE69207065T DE69207065T2 (en) 1991-05-20 1992-05-14 Hydraulic circuit for lifts and freight lifts or the like
EP92108202A EP0514782B1 (en) 1991-05-20 1992-05-14 Hydraulic circuit for passenger and freight elevators and the like
DK92108202.0T DK0514782T3 (en) 1991-05-20 1992-05-14 Hydraulic circuit for passenger and freight elevators and the like
AT92108202T ATE132112T1 (en) 1991-05-20 1992-05-14 HYDRAULIC CIRCUIT FOR ELEVATORS AND LIFTS OR SIMILAR
GR960400428T GR3019026T3 (en) 1991-05-20 1996-02-20 Hydraulic circuit for passenger and freight elevators and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI911374A IT1248792B (en) 1991-05-20 1991-05-20 HYDRAULIC CIRCUIT FOR LIFTS, LIFTS AND SIMILAR, WITH INTRINSIC SAFETY

Publications (3)

Publication Number Publication Date
ITMI911374A0 ITMI911374A0 (en) 1991-05-20
ITMI911374A1 ITMI911374A1 (en) 1992-11-20
IT1248792B true IT1248792B (en) 1995-01-30

Family

ID=11359931

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI911374A IT1248792B (en) 1991-05-20 1991-05-20 HYDRAULIC CIRCUIT FOR LIFTS, LIFTS AND SIMILAR, WITH INTRINSIC SAFETY

Country Status (7)

Country Link
EP (1) EP0514782B1 (en)
AT (1) ATE132112T1 (en)
DE (1) DE69207065T2 (en)
DK (1) DK0514782T3 (en)
ES (1) ES2082272T3 (en)
GR (1) GR3019026T3 (en)
IT (1) IT1248792B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19545657A1 (en) * 1995-12-07 1997-06-12 Rexroth Mannesmann Gmbh Hydraulic valve arrangement with a pressure-controlled directional valve
US8191689B2 (en) * 2009-06-19 2012-06-05 Tower Elevator Systems, Inc. Elevator safety rescue system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3434014A1 (en) * 1984-09-15 1986-03-20 Beringer-Hydraulik GmbH, Neuheim, Zug HYDRAULIC CONTROL
US4726450A (en) * 1985-11-18 1988-02-23 Otis Elevator Company Hydraulic elevator with dynamically programmed motor-operated valve
DE3709661C2 (en) * 1987-03-24 1995-07-13 Haushahn C Gmbh Co Device for suppressing or preventing the vibrations of a motor-driven hoist, in particular an elevator
US5014824A (en) * 1990-01-19 1991-05-14 Otis Elevator Company Hydraulic elevator control valve

Also Published As

Publication number Publication date
EP0514782A1 (en) 1992-11-25
ES2082272T3 (en) 1996-03-16
ITMI911374A0 (en) 1991-05-20
DE69207065T2 (en) 1996-06-27
GR3019026T3 (en) 1996-05-31
ATE132112T1 (en) 1996-01-15
ITMI911374A1 (en) 1992-11-20
EP0514782B1 (en) 1995-12-27
DE69207065D1 (en) 1996-02-08
DK0514782T3 (en) 1996-05-20

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19970529