EP3643657B1 - Method and system for automatically monitoring a hydraulic circuit for lifts, goods lifts and the like, equipped with inherent safety mechanism - Google Patents
Method and system for automatically monitoring a hydraulic circuit for lifts, goods lifts and the like, equipped with inherent safety mechanism Download PDFInfo
- Publication number
- EP3643657B1 EP3643657B1 EP19020565.8A EP19020565A EP3643657B1 EP 3643657 B1 EP3643657 B1 EP 3643657B1 EP 19020565 A EP19020565 A EP 19020565A EP 3643657 B1 EP3643657 B1 EP 3643657B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- cabin
- sensing device
- lifts
- series
- 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 45
- 238000012544 monitoring process Methods 0.000 title claims description 32
- 238000012360 testing method Methods 0.000 claims description 16
- 239000007858 starting material Substances 0.000 claims description 10
- 238000010835 comparative analysis Methods 0.000 claims description 6
- 230000003213 activating effect Effects 0.000 claims description 2
- 230000004913 activation Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/02—Control systems without regulation, i.e. without retroactive action
- B66B1/04—Control systems without regulation, i.e. without retroactive action hydraulic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
- B66B9/04—Kinds or types of lifts in, or associated with, buildings or other structures actuated pneumatically or hydraulically
Definitions
- the present invention relates to a method for automatically monitoring a hydraulic circuit equipped with inherent safety mechanism.
- the present invention also relates to a system for the movement of lifts or goods lifts or the like, implementing a method for automatically monitoring a hydraulic circuit equipped with inherent safety mechanism.
- the type of system used to move the cabin is chosen in relation to the specific intended use, as well as to the performance required of the same.
- one important aspect relates to the safety of the system.
- Systems are therefore generally provided with special devices, such as for example electric valves or sensors which, in the case of engine failure, allow the movement of the cabin to be stopped.
- the oil flow rate generally regards at least two valves arranged in series.
- German patent DE 10 2015 111303 A1 discloses the process of monitoring the pressure of the hydraulic circuit of a lift with the use of two valves in parallel, so as to store energy in an accumulator and use it in the event of a mains power failure.
- detection devices are instead provided, which are used only when the lift has the doors open with the cabin moving, with a sensor able to detect whether the differential value is outside a predefined range.
- the purpose of the present invention is to overcome the drawbacks and limitations of the safety systems complained of above.
- the purpose of the present invention is to provide a monitoring method which improves the safety of the hydraulic systems used in lifts, goods lifts and the like, which has safety elements arranged in series.
- a further purpose of the present invention is to provide a monitoring system which allows systematic checks of the functioning of the control elements.
- a further purpose of the present invention is to provide a monitoring method which is automated and coordinated with the movement actuation devices of the system to which it is applied, so as to ensure a high level of operating over time.
- a no less important purpose of the invention is to provide a monitoring method which is simple to implement and such as to be easily and inexpensively manufactured.
- reference numeral 1 globally denotes a hydraulic circuit for lifts, goods lifts or the like, configured to move at least one cabin 101 by moving a piston 100.
- the circuit 1 comprises a flow regulator valve 8, a magnetic descent valve 12 which pilots a non-return valve 14 and a magnetic starter valve 18 which pilots a pressure relief valve 16 indicated as "VB".
- the circuit further comprises a tank 26, a motor 28, a pump 29, a magnetic levelling valve 20, a flow valve 32 and a pilot valve 24, indicated as "VS".
- the magnetic starter valve 18 also indicated as "VMP" is electrically controlled so as to keep the pressure relief valve 16 supported, i.e. closed, in the absence of an electric control.
- VMP valve 18 is not electrically controlled, so as to remain closed and support the pressure relief valve 16, preferably up to reaching a pressure value which is set on the pilot valve 24. This way it is possible to create the pressure needed for the ascent of the cabin 101 of the system.
- the pressure relief valve 16 During the descent phase, wishing to keep the pressure relief valve 16 open, it is activated by sending an electric signal to the VMP valve 18; this way the pressure relief valve 16 is not supported, thereby allowing the opening of the same and the consequent descent of the cabin 101 of the system. According to a similar method, the magnetic descent valve 12 receives an electric signal so as to pilot the opening of the non-return valve 14.
- the hydraulic circuit has the non-return 14 (indicated as "VRP") and pressure relief 16 (VB) valves arranged in series; while the first is a real and actual non-return valve, suitable to keep the cabin 101 stationary at the floor, the second has a safety function and is appropriately supported by the starter valve 18, in the manner previously described.
- VRP non-return 14
- VB pressure relief 16
- the two valves VRP and VB must be in the closed position when the cabin 101 is stationary at the floor.
- valves VRP and VB are brought into the open position so as to allow the outflow of the fluid contained in the circuit towards the tank 26.
- the hydraulic circuit 1 preferably presents, in all the embodiments shown in figures 1 to 6 , an auxiliary circuit 200 designed for emergency manoeuvres in ascent of the cabin 101, comprising a manual pump and a second pressure relief valve 10.
- the hydraulic circuit 1 is further configured to implement an automatic monitoring method. This method is suitable to control the correct functioning of at least two electrically-controlled hydraulic valves operating in series present in said circuit, and to restore safe conditions of the system should malfunction of any elements of the system, appropriately identified in a design phase of said monitoring system, be detected.
- the provision of at least one position sensing device (not shown in the drawings) in proximity of at least one stopping plane of the cabin 101 is envisaged.
- said electrically-controlled hydraulic valves operating in series comprise check valves and/or regulator valves.
- said at least two hydraulic valves comprise a non-return valve 14 and a pressure relief valve 16.
- the monitoring method according to the present invention can be implemented in a continuous manner and comprises providing at least one control device (41, 42), associated with each of the two valves (14, 16) operating in series.
- the method comprises receiving the signals detected by the control devices (41, 42) associated with each valve (14, 16) operating in series and, after receiving a signal generated by said at least one position sensing device, activating a comparative analysis of the signals coming from said control devices (41, 42) associated with each of the valves (14, 16).
- said activation of a comparative analysis comprises the steps of comparing the values of said signals detected by the control devices (41, 42) and, in the event in which at least one of said signals detected identifies an open status of the relative valve (14, 16), generating a system failure status report.
- the system is automatically put into an out of service mode.
- the monitoring method comprises interrupting the movement of the cabin 101, following a failure status report resulting from said comparative analysis of the signals.
- control devices consist of detectors and/or sensors.
- control devices comprise one or more electromechanical sensors 41, configured to verify the closed and/or open position of the valves (14, 16) operating in series.
- said control devices comprise at least one hydraulic electro sensor 42 configured to verify the closed and/or open position of one of said valves (14, 16) operating in series.
- said at least one sensing device is positioned below the level of said stopping plane.
- said at least one sensing device is placed at a distance between 5 mm and 550 mm from the cabin stopping plane 101.
- said at least one sensing device is placed at a distance between 20 mm and 30 mm from the cabin stopping plane 101.
- the position of the pressure relief valve 16 is verified by means of an electromechanical sensor 41.
- the position of the non-return valve 14 is verified by means of an electrohydraulic sensor 42.
- the position of the pressure relief valve 16 is verified by means of an electromechanical sensor 41.
- the position of the non-return valve 14 is also verified by means of an electromechanical sensor 41.
- the position of the pressure relief valve 16 is verified by means of two electromechanical sensors 41.
- the position of the non-return valve 14 is also verified by means of two electromechanical sensors 41.
- the continuous automatic monitoring method described above can be implemented on further possible layouts of hydraulic systems on condition that they have at least two electrically-controlled hydraulic valves operating in series.
- the monitoring method according to the present invention can be implemented in a programmed manner, scheduling the periodic performance of a specific test, which if passed ensures the integrity and proper functioning of the at least two electrically-controlled hydraulic valves operating in series, and therefore of the system overall.
- the automatic monitoring method comprises providing at least one position sensing device (not shown in the drawings) in the proximity of at least one stopping plane of the cabin 101.
- said at least one position sensing device is positioned below the level of said stopping plane.
- the automatic monitoring method of the present invention envisages two separate steps.
- a first test step hereinafter referred to as F1
- the control panel energises the starter valve 18 for a time t 1 , predetermined during the design phase, and verifies that the cabin 101 does not intercept the position sensing device placed below the stopping plane. If the cabin 101 is not intercepted by said device, the test is considered as passed. In the case in which, instead, the cabin 101 is intercepted by the sensing device, the test is not considered passed and the device sends a signal to the control panel (not shown in the drawings) which de-energises the starter valve 18 and places the system in out of service status.
- F2 a second test step is performed, identified hereinafter as F2.
- the control panel energises the descent valve 12 for a time t 2 , predetermined during the design phase, and verifies that the cabin 101 is not intercepted by the position sensing device positioned below the stopping plane. If said device does not intercept the cabin 101, the test is considered as passed. In the case in which, instead, the cabin 101 is intercepted by the sensing device, the test is not considered passed and said device sends a signal to the control panel which de-energises the descent valve 12 and places the system in out of service status.
- said at least one sensing device is placed at a distance between 5 mm and 550 mm from the cabin stopping plane 101.
- said at least one sensing device is placed at a distance between 20 mm and 30 mm from the cabin stopping plane 101.
- the opening time t 1 is more than 0.1 second and less than 60 seconds.
- the opening time t 2 is more than 0.1 second and less than 60 seconds.
- the opening time t 1 is more than 1 second and less than 10 seconds.
- the opening time t 2 is more than 1 second and less than 10 seconds.
- the test described above is performed regularly according to a time interval, between one test and the next, of more than 1 minute.
- the performance of said first step F1 and second step F2 can advantageously be actuated according to any desired sequence, on condition that both steps are completed, whenever the test is performed.
- Such scheduled automatic monitoring method can be conveniently implemented in pre-existing hydraulic circuits, allowing a significant increase in the safety of said circuits and at the same time limiting costs.
Description
- The present invention relates to a method for automatically monitoring a hydraulic circuit equipped with inherent safety mechanism.
- The present invention also relates to a system for the movement of lifts or goods lifts or the like, implementing a method for automatically monitoring a hydraulic circuit equipped with inherent safety mechanism. In the sector of lifts, goods lifts and the like, the type of system used to move the cabin is chosen in relation to the specific intended use, as well as to the performance required of the same.
- With specific reference to hydraulic systems, one important aspect relates to the safety of the system. Systems are therefore generally provided with special devices, such as for example electric valves or sensors which, in the case of engine failure, allow the movement of the cabin to be stopped. In systems in which the operating fluid involves the actuators themselves, both in the ascent and descent of the cabin, the oil flow rate generally regards at least two valves arranged in series.
- In such context, wishing to achieve the required safety of the system and prevent, in the case of failure of one of the valves present, an unintentional descent of the cabin due to gravity, specific and independent members are used, which add to the design and production costs of the system.
- The
German patent DE 10 2015 111303 A1 discloses the process of monitoring the pressure of the hydraulic circuit of a lift with the use of two valves in parallel, so as to store energy in an accumulator and use it in the event of a mains power failure. In the solution described inWO 2017/013709 detection devices are instead provided, which are used only when the lift has the doors open with the cabin moving, with a sensor able to detect whether the differential value is outside a predefined range. The purpose of the present invention is to overcome the drawbacks and limitations of the safety systems complained of above. - More in particular, the purpose of the present invention is to provide a monitoring method which improves the safety of the hydraulic systems used in lifts, goods lifts and the like, which has safety elements arranged in series.
- A further purpose of the present invention is to provide a monitoring system which allows systematic checks of the functioning of the control elements.
- A further purpose of the present invention is to provide a monitoring method which is automated and coordinated with the movement actuation devices of the system to which it is applied, so as to ensure a high level of operating over time.
- A no less important purpose of the invention is to provide a monitoring method which is simple to implement and such as to be easily and inexpensively manufactured.
- The purpose is achieved by the 2 independent method claims .
- The invention will be described below with reference to several examples, provided by way of non-limiting examples and illustrated in the appended drawings. These drawings illustrate different aspects and embodiments of the present invention and where appropriate similar reference numerals illustrate similar structures, components and /or elements in different drawings.
-
Figure 1 shows an exemplary diagram of a hydraulic circuit for the implementation of a first embodiment of the monitoring method according to the present invention; -
Figure 2 shows an exemplary diagram of the hydraulic circuit infigure 1 , for the implementation of a second embodiment of the monitoring method according to the present invention; -
Figure 3 shows an exemplary diagram of the hydraulic circuit infigure 1 , for the implementation of a third embodiment of the monitoring method according to the present invention; -
Figure 4 shows an exemplary diagram of a variant of the circuit infigure 1 implementing the first embodiment of the monitoring method according to the present invention; -
Figure 5 shows a diagram of the circuit infigure 4 , implementing the second embodiment of the monitoring method according to the present invention; and -
Figure 6 shows a diagram of the circuit infigure 4 , implementing the third embodiment of the monitoring method according to the present invention. - With reference to the appended drawings,
reference numeral 1 globally denotes a hydraulic circuit for lifts, goods lifts or the like, configured to move at least onecabin 101 by moving apiston 100. - In a possible preferred embodiment, as shown in
figures 1 to 3 , thecircuit 1 comprises aflow regulator valve 8, amagnetic descent valve 12 which pilots anon-return valve 14 and amagnetic starter valve 18 which pilots apressure relief valve 16 indicated as "VB". - The circuit further comprises a
tank 26, amotor 28, apump 29, amagnetic levelling valve 20, aflow valve 32 and apilot valve 24, indicated as "VS". - Preferably the
magnetic starter valve 18 also indicated as "VMP" is electrically controlled so as to keep thepressure relief valve 16 supported, i.e. closed, in the absence of an electric control. - More in particular, during the ascent phase said
VMP valve 18 is not electrically controlled, so as to remain closed and support thepressure relief valve 16, preferably up to reaching a pressure value which is set on thepilot valve 24. This way it is possible to create the pressure needed for the ascent of thecabin 101 of the system. - During the descent phase, wishing to keep the
pressure relief valve 16 open, it is activated by sending an electric signal to theVMP valve 18; this way thepressure relief valve 16 is not supported, thereby allowing the opening of the same and the consequent descent of thecabin 101 of the system. According to a similar method, themagnetic descent valve 12 receives an electric signal so as to pilot the opening of thenon-return valve 14. - Preferably, the hydraulic circuit has the non-return 14 (indicated as "VRP") and pressure relief 16 (VB) valves arranged in series; while the first is a real and actual non-return valve, suitable to keep the
cabin 101 stationary at the floor, the second has a safety function and is appropriately supported by thestarter valve 18, in the manner previously described. - Preferably the two valves VRP and VB must be in the closed position when the
cabin 101 is stationary at the floor. - During the descent phase of the
cabin 101, the valves VRP and VB are brought into the open position so as to allow the outflow of the fluid contained in the circuit towards thetank 26. - Said conditions are achieved by means of a specific command on the control panel which electrically powers respectively, the descent valve 12 (VMD) which pilots the non-return valve 14 (VRP), and the starter valve 18 (VMP) which pilots the pressure relief valve 16 (VB). A construction variant of the
hydraulic circuit 1 described above, implementing the monitoring method according to the present invention, is shown infigures 4 to 6 , wherein thecircuit 1 further comprises a stepper-motor 31 suitable to govern theflow regulator valve 8. - The
hydraulic circuit 1 preferably presents, in all the embodiments shown infigures 1 to 6 , anauxiliary circuit 200 designed for emergency manoeuvres in ascent of thecabin 101, comprising a manual pump and a secondpressure relief valve 10. - According to both embodiments of the
hydraulic circuit 1, a system with inherent safety is realised. - The
hydraulic circuit 1 is further configured to implement an automatic monitoring method. This method is suitable to control the correct functioning of at least two electrically-controlled hydraulic valves operating in series present in said circuit, and to restore safe conditions of the system should malfunction of any elements of the system, appropriately identified in a design phase of said monitoring system, be detected. - According to the automatic monitoring method of the present invention, the provision of at least one position sensing device (not shown in the drawings) in proximity of at least one stopping plane of the
cabin 101 is envisaged. - Preferably, said electrically-controlled hydraulic valves operating in series comprise check valves and/or regulator valves.
- In a preferred embodiment, said at least two hydraulic valves comprise a
non-return valve 14 and apressure relief valve 16. - In a first preferred embodiment, the monitoring method according to the present invention can be implemented in a continuous manner and comprises providing at least one control device (41, 42), associated with each of the two valves (14, 16) operating in series.
- The method comprises receiving the signals detected by the control devices (41, 42) associated with each valve (14, 16) operating in series and, after receiving a signal generated by said at least one position sensing device, activating a comparative analysis of the signals coming from said control devices (41, 42) associated with each of the valves (14, 16).
- Preferably, said activation of a comparative analysis comprises the steps of comparing the values of said signals detected by the control devices (41, 42) and, in the event in which at least one of said signals detected identifies an open status of the relative valve (14, 16), generating a system failure status report.
- Preferably, following a failure status report, the system is automatically put into an out of service mode.
- Preferably, the monitoring method comprises interrupting the movement of the
cabin 101, following a failure status report resulting from said comparative analysis of the signals. - Advantageously, according to said monitoring method it is possible to verify, at the moment in which the
cabin 101 is stationary at the floor, if the valves (14, 16) operating in series are closed or not. - Preferably said control devices consist of detectors and/or sensors. Preferably said control devices comprise one or more
electromechanical sensors 41, configured to verify the closed and/or open position of the valves (14, 16) operating in series. - Preferably, said control devices comprise at least one
hydraulic electro sensor 42 configured to verify the closed and/or open position of one of said valves (14, 16) operating in series. - Preferably, said at least one sensing device is positioned below the level of said stopping plane.
- Preferably, said at least one sensing device is placed at a distance between 5 mm and 550 mm from the
cabin stopping plane 101. - Even more preferably, said at least one sensing device is placed at a distance between 20 mm and 30 mm from the
cabin stopping plane 101. According to a first preferred embodiment of the automatic, continuous monitoring method according to the present invention, as shown infigures 1 and4 , the position of thepressure relief valve 16 is verified by means of anelectromechanical sensor 41. Preferably, according to said embodiment, the position of thenon-return valve 14 is verified by means of anelectrohydraulic sensor 42. - According to a second preferred embodiment of the automatic continuous monitoring method according to the present invention, as shown in
figures 2 and5 , the position of thepressure relief valve 16 is verified by means of anelectromechanical sensor 41. Preferably, according to said embodiment, the position of thenon-return valve 14 is also verified by means of anelectromechanical sensor 41. - According to a third preferred embodiment of the automatic continuous monitoring method according to the present invention, as shown in
figures 3 and6 , the position of thepressure relief valve 16 is verified by means of twoelectromechanical sensors 41. Preferably, according to said embodiment, the position of thenon-return valve 14 is also verified by means of twoelectromechanical sensors 41. - The continuous automatic monitoring method described above can be implemented on further possible layouts of hydraulic systems on condition that they have at least two electrically-controlled hydraulic valves operating in series.
- Further embodiments are possible by appropriately configuring both the combinations of the control devices and hydraulic valves operating in series for which the correct position must be verified, and the number of said devices which need to be used to achieve the desired level of safety of the system.
- In a second preferred embodiment, the monitoring method according to the present invention can be implemented in a programmed manner, scheduling the periodic performance of a specific test, which if passed ensures the integrity and proper functioning of the at least two electrically-controlled hydraulic valves operating in series, and therefore of the system overall.
- Also according to said possible alternative embodiment, the automatic monitoring method comprises providing at least one position sensing device (not shown in the drawings) in the proximity of at least one stopping plane of the
cabin 101. - Preferably, said at least one position sensing device is positioned below the level of said stopping plane.
- According to such method, the automatic monitoring method of the present invention envisages two separate steps.
- In a first test step, hereinafter referred to as F1, the control panel energises the
starter valve 18 for a time t1, predetermined during the design phase, and verifies that thecabin 101 does not intercept the position sensing device placed below the stopping plane. If thecabin 101 is not intercepted by said device, the test is considered as passed. In the case in which, instead, thecabin 101 is intercepted by the sensing device, the test is not considered passed and the device sends a signal to the control panel (not shown in the drawings) which de-energises thestarter valve 18 and places the system in out of service status. - In the case in which the F1 step is passed, a second test step is performed, identified hereinafter as F2.
- In said second step F2, the control panel energises the
descent valve 12 for a time t2, predetermined during the design phase, and verifies that thecabin 101 is not intercepted by the position sensing device positioned below the stopping plane. If said device does not intercept thecabin 101, the test is considered as passed. In the case in which, instead, thecabin 101 is intercepted by the sensing device, the test is not considered passed and said device sends a signal to the control panel which de-energises thedescent valve 12 and places the system in out of service status. Preferably, said at least one sensing device is placed at a distance between 5 mm and 550 mm from thecabin stopping plane 101. - Even more preferably, said at least one sensing device is placed at a distance between 20 mm and 30 mm from the
cabin stopping plane 101. Preferably the opening time t1 is more than 0.1 second and less than 60 seconds. - Preferably the opening time t2 is more than 0.1 second and less than 60 seconds.
- In a preferred configuration, the opening time t1 is more than 1 second and less than 10 seconds.
- In a preferred configuration, the opening time t2 is more than 1 second and less than 10 seconds.
- Preferably, the test described above is performed regularly according to a time interval, between one test and the next, of more than 1 minute. The performance of said first step F1 and second step F2 can advantageously be actuated according to any desired sequence, on condition that both steps are completed, whenever the test is performed. Such scheduled automatic monitoring method can be conveniently implemented in pre-existing hydraulic circuits, allowing a significant increase in the safety of said circuits and at the same time limiting costs. Despite the invention having been described above with particular reference to several preferred embodiments, made solely by way of non-limiting examples, numerous modifications and variants will appear evident to a person skilled in the art in the light of the above description. The present invention therefore sets out to embrace all the modifications and variants which fall within the scope of the following claims.
Claims (11)
- Method for the automatic monitoring of a hydraulic circuit (1) operating in a system for the movement of lifts or goods lifts comprising at least one cabin (101) and at least two electrically controlled hydraulic valves (14, 16) arranged in series, said method comprising:- providing at least one position sensing device near at least one stopping plane of said at least one cabin (101);- providing at least one control device (41,42) associated with each of said at least two electrically controlled hydraulic valves (14, 16) arranged in series;- receiving the signals detected by the control devices (41,42) associated with each valve (14, 16);- after receiving a signal generated by said at least one position sensing device, activating a comparative analysis of the signals coming from said control devices (41,42);wherein said activation of a comparative analysis comprises the steps of:- comparing the values of said signals detected by the control devices (41,42);- in the case in which at least one of the aforementioned detected signals identifies an open status of the relative valve (14, 16), generating a system failure status report.
- Method according to claim 1, comprising interrupting the movement of the cabin (101), following a failure status report resulting from said comparative analysis of the signals.
- Method according to claim 1, wherein said at least two electrically controlled hydraulic valves arranged in series comprise a non-return valve (14) and a pressure relief valve (16).
- Method according to claim 1, wherein said control devices comprise at least one electromechanical sensor (41) configured to verify the closed and/or open position of one of said electrically controlled hydraulic valves (14, 16) arranged in series.
- Method according to claim 1, wherein said control devices comprise at least one hydraulic electro sensor (42) configured to verify the closed and/or open position of one of said electrically controlled hydraulic valves (14, 16) arranged in series.
- Method according to any one of the preceding claims wherein the position of the pressure relief valve (16) is verified by an electromechanical sensor (41) and the position of the non-return valve (14) is verified by a hydraulic electro sensor (42).
- Method according to any one of claims 1 to 5, wherein the position of the pressure relief valve (16) is verified by two electromechanical sensors (41) and the position of the non-return valve (14) is verified by two electromechanical sensors (41).
- Method according to any one of the preceding claims wherein said at least one position sensing device is positioned below the level of the cabin stopping plane (101).
- Method according to any one of the preceding claims wherein said at least one position sensing device is placed at a distance between 5 mm and 550 mm from the cabin stopping plane (101).
- Method for the automatic monitoring of a hydraulic circuit (1) operating in a system for the movement of lifts or goods lifts comprising at least one cabin (101) and at least two electrically controlled hydraulic valves (14, 16) arranged in series, respectively a non-return valve (14) and pressure relief valve (16), said method comprising:- providing at least one position sensing device near at least one stopping plane of said at least one cabin (101);- providing a control panel configured to send an electrical signal to at least one starter valve (18) and to a descent valve (12), receiving a signal from at least one position sensing device, comparing said signals;- conducting a first test phase F1 wherein the control panel excites the starter valve (18), which controls said pressure relief valve (16) for a time t1 and detects a signal from the position sensing device, said first test phase being passed if the cabin (101) is not intercepted by the position sensing device;- if the first test phase F1 is passed, conducting e a second test phase F2 in which the control panel excites the descent valve (12), which controls said non-return valve (14) for a time t2 and detects a signal from the position sensing device, said second test phase F2 being passed if the cabin (101) is not intercepted by the detection device; and wherein when at least one of said first and said second test phases is not passed, the control panel de-energises the starter valve (18) and/or the descent valve (12) and generates a system failure status report.
- System for the movement of lifts or goods lifts comprising:- at least one cabin (101) moved by means of a hydraulic circuit (1) having at least two electrically controlled hydraulic valves (14, 16) arranged in series;- one or more flow regulating valves (8), of descent (12), non-return (14), pressure-relief (16) and a magnetic starter valve (18) electrically controlled during the descent phase of the cabin (101) so as to allow the opening thereof;- at least one position sensing device near at least one stopping plane of said at least one cabin (101);- at least one control device (41,42) associated with each of said at least two electrically controlled hydraulic valves (14, 16) arranged in series- a control system operatively connected to said hydraulic circuit (1) implementing a method for automatic monitoring of the hydraulic circuit (1), according to claims 1 or 10.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102018000009449A IT201800009449A1 (en) | 2018-10-15 | 2018-10-15 | METHOD AND SYSTEM FOR AUTOMATIC MONITORING OF A HYDRAULIC CIRCUIT FOR LIFTS, GOODS AND SIMILAR LIFTS, EQUIPPED WITH INTRINSICALLY SAFETY |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3643657A1 EP3643657A1 (en) | 2020-04-29 |
EP3643657B1 true EP3643657B1 (en) | 2022-04-27 |
Family
ID=65031661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19020565.8A Active EP3643657B1 (en) | 2018-10-15 | 2019-10-10 | Method and system for automatically monitoring a hydraulic circuit for lifts, goods lifts and the like, equipped with inherent safety mechanism |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3643657B1 (en) |
ES (1) | ES2922724T3 (en) |
IT (1) | IT201800009449A1 (en) |
PL (1) | PL3643657T3 (en) |
PT (1) | PT3643657T (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4785914A (en) * | 1987-06-19 | 1988-11-22 | Westinghouse Electric Corp. | Elevator system leveling safeguard control and method |
US5212951A (en) * | 1991-05-16 | 1993-05-25 | Otis Elevator Company | Hydraulic elevator control valve |
KR100303012B1 (en) * | 1998-12-14 | 2002-05-09 | 장병우 | Hydraulic elevator system |
CN105723098A (en) * | 2013-09-16 | 2016-06-29 | 里卡多·莱拉·戈梅斯 | Hydraulic accumulator and method for recovering energy in a hydraulic system |
CN106144794B (en) * | 2015-04-02 | 2018-09-28 | 西屋电气(香港)有限公司 | A kind of hydraulic elevator control system and control method |
US10766742B2 (en) * | 2015-07-17 | 2020-09-08 | Mitsubishi Electric Corporation | Hydraulic elevator safety device, and method for detecting open-door travel abnormality in hydraulic elevator |
-
2018
- 2018-10-15 IT IT102018000009449A patent/IT201800009449A1/en unknown
-
2019
- 2019-10-10 PL PL19020565.8T patent/PL3643657T3/en unknown
- 2019-10-10 EP EP19020565.8A patent/EP3643657B1/en active Active
- 2019-10-10 PT PT190205658T patent/PT3643657T/en unknown
- 2019-10-10 ES ES19020565T patent/ES2922724T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
PT3643657T (en) | 2022-07-22 |
PL3643657T3 (en) | 2022-08-08 |
IT201800009449A1 (en) | 2020-04-15 |
ES2922724T3 (en) | 2022-09-19 |
EP3643657A1 (en) | 2020-04-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20170226788A1 (en) | Vehicle closure member power actuator control | |
RU2598485C2 (en) | Elevator emergency protection circuit | |
JP6263552B2 (en) | Elevator safety system | |
CN103459286B (en) | Elevator drive power supply control | |
CN103072687A (en) | Landing gear, an aircraft, and a method implemented by landing gear | |
US9617117B2 (en) | Elevator brake control including a solid state switch in series with a relay switch | |
CN104053903A (en) | A Hydraulic Pitch System For A Wind Turbine | |
EP2674381B1 (en) | Method for modernizing a hydraulic elevator | |
EP3643657B1 (en) | Method and system for automatically monitoring a hydraulic circuit for lifts, goods lifts and the like, equipped with inherent safety mechanism | |
CN103231960A (en) | Car accidental movement monitoring brake system acting on hydraulic system of hydraulic elevator | |
CN203269256U (en) | Lift car accidental movement monitoring and braking system acting on hydraulic system of hydraulic lift | |
EP3929132A1 (en) | Safety brake for elevator, lifting device including safety brake, and method for braking a lifting device by said safety brake | |
WO2015019357A1 (en) | Sabbath elevator | |
US8191689B2 (en) | Elevator safety rescue system | |
EP2890578B1 (en) | Brake control device for a vehicle, and a method for operating at least one electric drive motor for a vehicle | |
WO2011055434A1 (en) | Elevator control device | |
WO2018001830A1 (en) | Elevator with safety chain overlay control unit comprising a safety plc monitoring safety switches and mirroring a switching state to an elevator control | |
AU2019304006A1 (en) | Pressure-limiting assembly for use in hydraulic or pneumatic brake systems | |
EP3495302B1 (en) | Elevator apparatus and method | |
US20220017334A1 (en) | Door controller and door control system for controlling movements of at least one door leaf of an elevator door | |
DE202016101183U1 (en) | Elevator with a safety controller for directly influencing the braking force | |
CN110550195A (en) | brake system | |
CN112041529A (en) | Control device and method for controlling a window lifter with anti-pinch protection for a motor vehicle | |
CN108689287A (en) | The method and apparatus that stall for elevator door controls | |
EP0514782B1 (en) | Hydraulic circuit for passenger and freight elevators and the like |
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 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20201013 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20211223 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 1486817 Country of ref document: AT Kind code of ref document: T Effective date: 20220515 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602019013993 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: SE Ref legal event code: TRGR |
|
REG | Reference to a national code |
Ref country code: PT Ref legal event code: SC4A Ref document number: 3643657 Country of ref document: PT Date of ref document: 20220722 Kind code of ref document: T Free format text: AVAILABILITY OF NATIONAL TRANSLATION Effective date: 20220718 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20220427 |
|
REG | Reference to a national code |
Ref country code: NO Ref legal event code: T2 Effective date: 20220427 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2922724 Country of ref document: ES Kind code of ref document: T3 Effective date: 20220919 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220427 |
|
REG | Reference to a national code |
Ref country code: GR Ref legal event code: EP Ref document number: 20220401498 Country of ref document: GR Effective date: 20221010 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220427 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220427 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220427 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220727 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220427 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220427 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220827 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: PL Payment date: 20220929 Year of fee payment: 4 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602019013993 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220427 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220427 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220427 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220427 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220427 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220427 |
|
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 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220427 |
|
26N | No opposition filed |
Effective date: 20230130 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220427 Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220427 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20221031 |
|
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: 20221010 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: UEP Ref document number: 1486817 Country of ref document: AT Kind code of ref document: T Effective date: 20220427 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20221031 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20221031 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20221031 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20221010 |
|
REG | Reference to a national code |
Ref country code: NO Ref legal event code: CHAD Owner name: GMV MARTINI S.P.A., IT |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GR Payment date: 20231006 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20231110 Year of fee payment: 5 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R081 Ref document number: 602019013993 Country of ref document: DE Owner name: GMV MARTINI S.P.A., RHO, IT Free format text: FORMER OWNER: GMV MARTINI S.P.A., PERO, MAILAND/MILANO, IT |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: TR Payment date: 20231002 Year of fee payment: 5 Ref country code: SE Payment date: 20231018 Year of fee payment: 5 Ref country code: PT Payment date: 20231002 Year of fee payment: 5 Ref country code: NO Payment date: 20231019 Year of fee payment: 5 Ref country code: IT Payment date: 20231030 Year of fee payment: 5 Ref country code: FR Payment date: 20231023 Year of fee payment: 5 Ref country code: DE Payment date: 20231110 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: PL Payment date: 20231002 Year of fee payment: 5 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20191010 |