CN113800349A - Limiting and preventing device for elevator system and limiting and preventing method for elevator system - Google Patents
Limiting and preventing device for elevator system and limiting and preventing method for elevator system Download PDFInfo
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- CN113800349A CN113800349A CN202010534660.3A CN202010534660A CN113800349A CN 113800349 A CN113800349 A CN 113800349A CN 202010534660 A CN202010534660 A CN 202010534660A CN 113800349 A CN113800349 A CN 113800349A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000012423 maintenance Methods 0.000 claims abstract description 38
- 230000009471 action Effects 0.000 claims abstract description 8
- 239000004744 fabric Substances 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000001960 triggered effect Effects 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 230000005284 excitation Effects 0.000 claims description 2
- 230000035939 shock Effects 0.000 claims description 2
- 230000002265 prevention Effects 0.000 abstract description 2
- 230000004888 barrier function Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0043—Devices enhancing safety during maintenance
- B66B5/005—Safety of maintenance personnel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0087—Devices facilitating maintenance, repair or inspection tasks
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Abstract
The invention relates to a limit stopping device and a limit stopping method for an elevator system, wherein the device comprises an overhaul limit unit and a stopping unit; the maintenance limiting unit comprises a limit switch and a collision bow; the stopping unit comprises a driver, a driver start-stop trigger device, a base and a collision plate; the base is arranged at the top or the bottom of the car, and the striking plate is movably connected to the base to rotate between a first position and a second position; one of the limit switch and the impact bow is arranged on the guide rail or at a preset height on the shaft, and the other is arranged on the impact plate; when the collision plate is at the first position, the elevator system is in a normal running state, and the limit switch does not collide with the collision bow; when the collision plate is at the second position, the elevator system is in a maintenance state, and the limit switch collides with the collision bow, so that the elevator is stopped at a predetermined height. Through the comprehensive action of the maintenance limiting unit and the prevention unit, the requirements on the elevator shaft building are reduced, and the safety of maintainers is ensured.
Description
Technical Field
The invention relates to a limit stop device for an elevator system and also relates to a method for realizing limit stop of the elevator system by using the device.
Background
It is known that in order to ensure the long-term safe and normal operation of an elevator, the elevator needs to be maintained frequently or periodically, and a maintenance worker inevitably needs to enter the bottom pit or the top of a car of the elevator to work in the process of maintenance and repair. Therefore, the requirements of pit depth and top floor height of an elevator shaft are clearly specified in GB7588 elevator manufacturing and installation safety standard so as to ensure the personal safety of maintainers.
However, in some new buildings, the height of the top floor or the depth of the pit of the elevator shaft reserved in the design process is not enough, and particularly, when some old buildings are modified and the elevator is additionally installed outdoors, the space of the height of the original building is limited, so that the requirements of the height of the top floor or the depth of the pit of the elevator shaft specified in GB7588 elevator manufacturing and installing safety standard are difficult to meet.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a limit stopping device and a limit stopping method for an elevator system, which can stop an elevator at a preset safe height when the elevator system is in a maintenance state by utilizing the comprehensive action of a maintenance limit unit and a stopping unit so as to meet the requirement of the top layer height or the pit depth of an elevator shaft, thereby ensuring the safety of personnel entering the elevator pit or the top of a car for operation, and particularly meeting the requirement of ensuring the top layer height or the pit depth of the elevator shaft during maintenance under the condition that the original building height space is limited (the shaft with a low top layer and a shallow pit bottom) when some old buildings are reconstructed and the elevator is additionally installed outdoors, thereby reducing the self-space requirement of the elevator shaft building.
The purpose of the invention is realized by the following technical scheme:
a limit stopping device for an elevator system comprises an overhaul limit unit and a stopping unit; the maintenance limiting unit comprises a limit switch and a collision bow; the stopping unit comprises a driver, a driver start-stop trigger device, a base and a collision plate; the base is arranged at the top or the bottom of the car, and the striking plate is movably connected to the base to rotate between a first position and a second position relative to the base through the driving of the driver; one of the limit switch and the impact bow is arranged on a guide rail or at a preset height on a well, and the other of the limit switch and the impact bow is arranged on the impact plate; when the collision plate is at the first position, the elevator system is in a normal operation state, and the limit switch does not collide with the collision bow along with the travel of the elevator; the elevator system is in a service state when the striker plate is in the second position, and the limit switch meets the striker bow and collides with the striker bow as the elevator travels to stop the elevator at the predetermined height.
Preferably, the preventing unit further includes a barrier provided on the guide rail and adjacent to the pantograph or the limit switch provided on the guide rail or the hoistway.
Preferably, when the striker is in the second position, the striker can collide with the baffle to stop the elevator from moving along with the elevator, the baffle includes a connecting plate and a baffle plate, the connecting plate is connected to the guide rail, an end of the connecting plate opposite to the striker is connected to the baffle plate, and a surface of the baffle plate opposite to the striker is provided with a shock absorber.
Preferably, the striking plate comprises a top plate and two side plates respectively connected to two ends of the top plate, the two side plates are rotatably connected to the base, and the side plate of the striking plate is connected to the driver to drive the striking plate to rotate between the first position and the second position.
Preferably, a connection stopper is provided on the striking plate, and a coupling member corresponding to the connection stopper is provided on the base, and the connection stopper is coupled to the coupling member when the striking plate is at the first position.
Preferably, the engaging member is a magnet, and when the striking plate is at the first position, the connecting stopper is attracted to the magnet.
Preferably, a motor connecting hole is formed in the base, and an output shaft of the driver penetrates through the motor connecting hole and is connected with one side plate of the striking plate through a transmission mechanism so as to drive the striking plate to rotate between the first position and the second position.
Preferably, the base is provided with two lugs corresponding to the two side plates, the lugs are provided with base pin hole, the lower parts of the side plates are provided with side plate pin hole, and the side plates are connected with the lugs on the base in a rotating mode through pin shafts.
Preferably, the preventing unit further includes a state switch provided on or near the striking plate to detect a position of the striking plate.
Preferably, the overhaul limiting unit further comprises a control cabinet calling downlink or uplink emergency electric operation switch, and the control cabinet calling downlink or uplink emergency electric operation switch is installed in the control cabinet to control the operation of the elevator when the elevator system is in an overhaul state.
Preferably, a first impact bow and a first baffle are arranged at the upper part of the guide rail, and the first impact bow is positioned below the first baffle; a second collision bow and a second baffle are arranged at the lower part of the guide rail, and the second collision bow is positioned above the second baffle; the striking plate is provided with a first limit switch corresponding to the first striking bow and a second limit switch corresponding to the second striking bow, and the first limit switch is positioned above the second limit switch.
Preferably, a notch is formed in the bottom of the side plate of the striking plate and/or a notch is formed in the top of the second baffle plate.
Preferably, the driver start-stop triggering device is used for informing the driver to execute the action, and the driver start-stop triggering device is realized by one of the following modes:
the hall door lock switch is excited for a specified number of times within a preset time, the control system informs the driver to drive the collision plate to rotate to the second position, and the elevator system reaches a maintenance state; the hoistway door lock switch obtains excitation of different times from the appointed times within preset time, the control system informs the driver to drive the collision plate to rotate to the first position, and the elevator system is reset to a normal running state;
a pedal is arranged on the front side of the car roof, a switch and a buckle are connected below the pedal, the buckle clamps the pedal when the pedal is stepped down, the control system informs a driver to drive the collision plate to rotate to the second position, and the elevator system reaches a maintenance state; after the overhaul is finished, the buckle is opened, the control system informs the driver to drive the collision plate to rotate to the first position, and the elevator system is reset to a normal running state;
the elevator system comprises a car top, a control system, a driver, a car top, a car bottom, a car top, a car top, a car top, a car top, a car top; after the overhaul is finished, when the maintainer leaves the car roof, the cloth belt is inserted into the stand column again, the switch is disconnected, the control system informs the driver to drive the collision plate to rotate to the first position, and the elevator system is reset to a normal operation state.
Further, a method of achieving positive stop of an elevator system using the aforementioned positive stop device for an elevator system, the method comprising the steps of:
the control system detects that the collision plate of the preventing unit is at the first position through the state switch, the elevator system is in a normal running state, and the elevator can continue to normally run along with the fact that the collision does not occur when the travel limit switch of the elevator meets the collision bow;
when a maintainer needs to enter a car roof or a pit for maintenance, a driver is triggered through a driver start-stop trigger device to enable the driver to drive a collision plate to rotate to a second position, an elevator system is in a maintenance state, a safety circuit is disconnected when a travel limit switch of the elevator collides with a collision bow, the elevator stops, and the elevator cannot continue to travel, so that the elevator stops at a preset height;
when the overhaul is finished, the overhaul personnel start and stop the trigger device through the driver and trigger the driver, so that the driver drives the collision plate to rotate to the first position, and the elevator system resets to a normal operation state.
Preferably, the striking plate is in the second position and the elevator system is in a maintenance state, and when the elevator cannot be effectively stopped due to an operation failure of stopping the elevator by collision of the limit switch and the striking bow, as the elevator continues to travel, the travel of the elevator can be stopped by the striking plate colliding with the blocking plate, stopping the elevator at a height sufficient to protect a serviceman on the ceiling or the pit bottom.
The invention has the beneficial effects that:
the maintenance limit unit (comprising a limit switch, a collision bow and a control cabinet calling down or up emergency electric operation switch) is electrically controlled (the limit switch collides with the collision bow), so that the elevator can be allowed to freely move between the end stations in a normal operation state; when people enter the car roof or the pit, the travel of the car is limited, and a sufficient safety space is ensured at the top layer or the pit;
the stopping unit is controlled from the mechanical aspect (the limit between the striking plate and the baffle plate) so that the elevator can be allowed to freely move between the end stations under the normal running state of the elevator; when people enter the car roof or the pit, the travel of the car is limited, and a sufficient safety space is ensured at the top layer or the pit;
through the comprehensive action of the maintenance limiting unit and the preventing unit, the requirements on the elevator shaft building are reduced, and the safety of maintainers is ensured.
Drawings
Fig. 1 is a schematic structural view of a limiting prevention device for an elevator system according to an embodiment of the present invention, which is installed on an upper beam of a car with a striking plate in a second position and the elevator system in a service state;
fig. 2 is a schematic structural view of a limit stop device for an elevator system according to an embodiment of the present invention, which is mounted to an upper beam of a car, in which a striking plate is in a first position and the elevator system is in a normal operation state;
fig. 3 is a schematic structural view of a limiting stopper device for an elevator system according to an embodiment of the present invention installed at a lower beam of a car;
fig. 4 is a perspective view of a base of the positive stop device for an elevator system of fig. 1-3;
fig. 5 is a perspective view of a striker plate of the limit stop device for an elevator system of fig. 1-3;
fig. 6 is a perspective view of a baffle of the positive stop device for an elevator system of fig. 1-3;
fig. 7 is a schematic structural view of a spacing block apparatus for an elevator system according to another embodiment of the present invention mounted to an upper beam of a car.
Description of reference numerals:
1. a guide rail; 2. a baffle plate; 21. a connecting plate; 22. a connecting bolt; 23. a guard plate; 24. damping rubber; 3. knocking the bow; 4. a limit switch; 5. a status switch; 6. a striking plate; 61. a stop block connecting hole; 62. a state switch connection hole; 63. a limit switch attachment hole; 64. a side plate pin shaft hole; 7. connecting a stop block; 8. a lower beam; 9. a transmission mechanism; 10. a motor; 11. a base; 111. a motor connecting hole; 112. fixing the mounting hole; 113. a base pin hole; 12. a magnet; 13. and (4) an upper beam.
It is to be understood that the appended drawings are not to scale, but are merely drawn with appropriate simplifications to illustrate various features of the basic principles of the invention. Specific design features of the invention disclosed herein, including, for example, specific dimensions, orientations, locations, and configurations, will be determined in part by the particular intended application and use environment. In the several figures of the drawings, identical or equivalent components (elements) are referenced with the same reference numerals.
Detailed Description
The invention is further described below with reference to specific embodiments and the accompanying drawings.
As shown in fig. 1 and 2, a limit stop apparatus for an elevator system according to one embodiment of the present invention includes an inspection limit unit and a stop unit; the maintenance limiting unit comprises a limit switch 4 and a collision bow 3; the stopping unit comprises a driver, a driver start-stop trigger device, a base 11, a striking plate 6 and a state switch 5; the base 11 is arranged on an upper beam 13 of the cage, and the striking plate 6 is movably connected to the base 11 to rotate between a first position and a second position relative to the base 11 through the driving of the driver; in the present embodiment, the driver is a motor 10, and the motor 10 is connected to the striking plate 6 through a transmission mechanism 9.
Fig. 4 and 5 show the base 11 and the striking plate 6, respectively. The base 11 is provided with a fixing mounting hole 112 to be fixed to the upper beam 13 of the car top by bolts. The collision plate 6 comprises a top plate and two side plates connected to two ends of the top plate respectively, two lugs corresponding to the two side plates are arranged on the base 11, a base pin shaft hole 113 is formed in each lug, a side plate pin shaft hole 64 is formed in the lower portion of each side plate, and the side plates are connected with the lugs on the base 11 in a rotating mode through pin shafts. An output shaft of the motor 10 passes through a motor connecting hole 111 on the base 11 and is connected with one side plate of the striking plate 6 through a transmission mechanism 9 to drive the striking plate 6 to rotate between the first position and the second position.
As shown in fig. 1 and 2, the pantograph 3 is disposed at a predetermined height on the guide rail 1 (or also at a predetermined height on the hoistway), where the predetermined height is such that a sufficient safety space is secured for the top floor or pit when the elevator is stopped at that height. The limit switch 4 is provided on the striker 6, and as shown in fig. 5, a limit switch attachment hole 63 is provided in an upper portion of a side plate of the striker 6. Of course, the striker 3 may be provided on the striker plate 6, and the limit switch 4 may be provided on the guide rail 1 or the hoistway.
As shown in fig. 1, the striking plate 6 is at the second position, the side plate of the striking plate 6 is kept in a basically vertical state, when the side plate is in the vertical state, the elevator system is in an overhaul state, the limit switch 4 at the upper part of the side plate can meet the striking bow 3 on the guide rail 1 along with the running of the elevator and the two collide, the safety circuit is disconnected, the elevator stops and cannot run continuously, so that the elevator stops at a preset height, the safety of maintainers at the top of the elevator car or at the bottom of the elevator pit is protected, the maintainers at the top of the elevator car or at the bottom of the elevator pit call the machine room maintainers to operate the control cabinet to call the down or up emergency electric operation switch, and the elevator can overhaul the down or up emergency electric operation switch.
As shown in fig. 2, when the striker 6 is in the first position (i.e., the striker 6 is rotated from the position close to the guide rail 1 (the second position) to the position away from the guide rail 1 (the first position), the elevator system is in a normal operation state, and the limit switch 4 does not collide with the pantograph 3 as the elevator travels, that is, since the limit switch 4 is away from the pantograph 3, the limit switch 4 does not interfere with the pantograph 3 while the elevator travels. In addition, the striking plate 6 is provided with a connecting stopper 7, as shown in fig. 5, a stopper connecting hole 61 is formed on a side plate of the striking plate 6, and a coupling member corresponding to the connecting stopper 7 is provided on the base 11, where the coupling member is a magnet 12, and the connecting stopper 7 is made of a magnetic material, and when the striking plate 6 is at the first position, the connecting stopper 7 is attracted to the magnet 12, so that it is ensured that the striking plate 6 can be stably maintained at the first position.
The state switch 5 is provided on a side plate of the striker 6 to detect the position of the striker 6 and notify the control system of the position state of the striker 6. As shown in fig. 5, a side plate of the striking plate 6 is provided with a state switch attachment hole 62.
A control cabinet call down or up emergency electrically operated switch (not shown) is mounted in the control cabinet to control operation of the elevator when the elevator system is in service.
A drive start-stop trigger (not shown) for informing the drive (here, the motor 10) to perform an action can be implemented by one of the following ways:
the hall door lock switch is excited for a specified number of times (for example, 3 times) within 30s, the control system informs the driver to drive the striking plate 6 to rotate to the second position, and the elevator system reaches a maintenance state; the hall door lock switch is excited for a number of times (for example, 4 times) different from the designated number of times within 30s, the control system informs the driver to drive the striking plate 6 to rotate to the first position, and the elevator system is reset to a normal operation state;
a pedal is arranged on the front side of the car roof, a switch and a buckle are connected below the pedal, when a maintainer opens a hall door and steps on the pedal to enter the car roof, the buckle clamps the pedal, the switch is switched on, the control system informs the driver to drive the striking plate 6 to rotate to the second position, and the elevator system reaches a maintenance state; after the maintenance is finished, a maintainer opens the buckle, the pedal is positioned above the buckle, the switch is switched off, the control system informs the driver to drive the collision plate 6 to rotate to the first position, and the elevator system is reset to a normal running state;
the elevator system comprises a car top, a control system, a driver, a cloth belt winding mechanism and a cloth belt winding mechanism, wherein two stand columns are installed on the front side of the car top, a switch is installed on one stand column, the other stand column is provided with the cloth belt winding mechanism, a retractable cloth belt is hung between the two stand columns, when a maintainer opens a hall door, enters the car top, takes off the cloth belt from the one stand column, the cloth belt is automatically wound on the other stand column, the switch on the stand column is switched on, the control system informs the driver to drive the collision plate 6 to rotate to the second position, and the elevator system reaches a maintenance state; after the overhaul is finished, when the maintainer leaves the car roof, the cloth belt is inserted into the stand column again, the switch is disconnected, the control system informs the driver to drive the collision plate 6 to rotate to the first position, and the elevator system is reset to a normal operation state.
The maintenance limit unit (comprising a limit switch 4, a collision bow 3 and a control cabinet calling a downlink or uplink emergency electric operation switch) is electrically controlled (the limit switch 4 collides with the collision bow 3), so that the elevator can be allowed to freely move between the end stations in a normal operation state; when people enter the car roof or the pit, the travel of the car is limited, and the top layer or the pit is ensured to have enough safety space.
According to an embodiment of the invention, the arresting unit further comprises a baffle 2, as shown in fig. 1 and 2, the baffle 2 being arranged on said guide rail 1, in which embodiment the baffle 2 is located close to the pantograph 3 and above the pantograph 3. When the striker 6 is in the second position, the striker 6 can collide with the baffle 2 to stop the travel of the elevator as the elevator travels.
The stopping unit is controlled from the mechanical aspect (the limit between the striking plate 6 and the baffle plate 2) so that the elevator can be allowed to freely move between the end stations under the normal running state of the elevator; when people enter the car roof or the pit, the collision plate 6 collides with the baffle 2 to limit the stroke of the car and ensure that the top layer or the pit has enough safety space.
As shown in fig. 6, the baffle 2 includes a connecting plate 21 and a baffle plate 23, the connecting plate 21 is provided with a long hole (or a round hole), the connecting plate 21 is connected to the guide rail 1 through a connecting bolt 22, the end of the connecting plate 21 opposite to the striker 6 is connected to the baffle plate 23, and a damper is provided on the surface of the baffle plate 23 opposite to the striker 6, wherein the damper is a damper rubber 24, so that the impact on the car can be reduced when the striker 6 collides with the baffle 2.
The embodiment shown in fig. 1 and 2 is such that the base 11 of the blocking unit is fixed to the upper beam 13 of the car and if the elevator system is in service (striker plate 6 in the second position), the limit switch 4 collides with the striker 3 and the elevator stops when it is moving upwards. Fig. 3 shows an embodiment in which the base 11 of the blocking unit is fixed to the lower beam 8 of the car, with the blocking plate 2 below the pantograph 3, and the limit switch 4 collides with the pantograph 3 when the elevator is moving downwards if the elevator system is in service (the striking plate 6 in the second position).
Fig. 7 shows a limit stop device for an elevator system according to another embodiment of the present invention, which is mounted on an upper beam 13 of a car. The embodiment of fig. 7 differs from the embodiment of fig. 1 and 2 in that in the embodiment of fig. 7, two limit switches 4, two impact bows 3 and two flaps 2 are provided, whereas in fig. 1 and 2 only one limit switch 4, one impact bow 3 and one flap 2 are provided. In fig. 7, a pantograph 3 and a baffle 2 are provided at the upper portion of the guide rail 1, and the baffle 2 is on the upper side and the pantograph 3 is on the lower side; the other impact bow 3 and the other baffle 2 are arranged at the lower part of the guide rail 1, the baffle 2 is arranged at the lower part, and the impact bow 3 is arranged at the upper part; two limit switches 4 are juxtaposed in the vertical direction on one side plate of the striking plate 6. In addition, the bottom of the side plate of the striking plate 6 in fig. 7 is provided with a notch, so that the lower limit switch 4 and the lower striking bow 3 can collide smoothly, if the notch is not arranged at the bottom of the side plate, the elevator is in a maintenance state, the elevator moves downwards, the bottom of the side plate collides with the top of the baffle plate firstly, so that the elevator cannot move downwards, and further the lower limit switch 4 cannot collide with a striker positioned at the lower part of the guide rail firstly, so that the notch is arranged, the baffle plate at the lower part can enter the notch, the baffle plate cannot collide with the side plate of the striking plate too early, and the elevator can continue to move downwards until the lower limit switch 4 and the lower striking bow 3 can collide smoothly. If the collision operation of the lower limit switch 4 and the lower bow 3 fails and the elevator cannot be stopped, the elevator continues to descend and the barrier continues to enter the recess until the barrier collides with the striker plate, whereby the elevator can be mechanically stopped. Of course, the notch may be provided on the top of the lower baffle plate 2, or on both the bottom of the side plate of the striking plate and the top of the lower baffle plate 2.
Although the embodiment of fig. 7 differs somewhat in structure from the embodiment of fig. 1 and 2, their principles of operation are substantially the same. As shown in fig. 7, according to the space condition of the elevator hoistway building, when the height of the top floor and the depth of the pit of the elevator system can not meet the requirements, two baffles and two impact bows (respectively located at the upper part and the lower part of the guide rail) can be arranged on the guide rail of the elevator, and correspondingly, two limit switches are arranged on the impact plate, so that the elevator can be stopped at the upper part of the guide rail or the lower part of the guide rail according to the maintenance requirement. When the elevator goes upwards, the upper impact bow collides with the upper limit switch or the upper baffle collides with the impact plate; when the elevator moves downwards, the lower impact bow collides with the lower limit switch or the lower baffle collides with the impact plate.
The elevator system can stop at a preset safety high position by utilizing the comprehensive action of the maintenance limiting unit and the preventing unit when the elevator system is in a maintenance state so as to meet the requirement of the top layer height or the pit depth of the elevator shaft, thereby ensuring the safety of personnel entering the elevator pit or the top of the car for operation, and particularly meeting the requirement of ensuring the top layer height or the pit depth of the elevator shaft during maintenance when the original building height space is limited (the shaft with a low top layer and a shallow pit bottom) during the reconstruction of some old buildings and the outdoor installation of the elevator, thereby reducing the self space requirement of the elevator shaft building.
The limit stopping device can reduce the requirements on elevator shaft buildings. Specifically, the control system detects that the collision plate 6 of the preventing unit is at the first position through the state switch 5, the elevator system is in a normal running state, and the elevator can continue to run normally as the collision does not occur when the travel limit switch 4 of the elevator meets the collision bow 3; when a maintainer needs to enter the car roof or the pit for maintenance, a driver is triggered through a driver start-stop trigger device, so that the driver drives the collision plate 6 to rotate to a second position, the elevator system is in a maintenance state, a safety circuit is disconnected along with collision of the traveling limit switch 4 of the elevator and the collision bow 3 when the two collide, the elevator stops, the elevator cannot travel continuously, so that the elevator stops at a preset height, the safety of the maintainer at the car roof or the pit bottom is protected, the maintainer at the car roof or the pit calls a machine room maintainer operation control cabinet to call a downlink or uplink emergency electric operation switch, and the elevator can maintain the downlink or uplink; when the overhaul is finished, the overhaul personnel start and stop the trigger device through the driver and trigger the driver, so that the driver drives the collision plate 6 to rotate to the first position, and the elevator system resets to a normal operation state.
The striking plate 6 is in the second position and the elevator system is in a maintenance state, and when the elevator cannot be effectively stopped due to an operation failure of stopping the elevator by the collision of the limit switch 4 and the striking bow 3, as the elevator continues to travel, the travel of the elevator can be stopped by the striking plate 6 colliding with the barrier 2, stopping the elevator at a height sufficient to protect a maintenance worker on the ceiling or the pit bottom.
The maintenance limit unit (comprising a limit switch 4, a collision bow 3 and a control cabinet calling a downlink or uplink emergency electric operation switch) is electrically controlled (the limit switch 4 collides with the collision bow 3), so that the elevator can be allowed to freely move between the end stations in a normal operation state; when people enter the car roof or the pit, the travel of the car is limited, and a sufficient safety space is ensured at the top layer or the pit;
the stopping unit is controlled from the mechanical aspect (the limit between the striking plate 6 and the baffle plate 2) so that the elevator can be allowed to freely move between the end stations under the normal running state of the elevator; when people enter the car roof or the pit, the travel of the car is limited, and a sufficient safety space is ensured at the top layer or the pit;
through the comprehensive action of the maintenance limiting unit and the preventing unit, the requirements on the elevator shaft building are reduced, and the safety of maintainers is ensured.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. The foregoing description is not intended to be exhaustive or to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable others skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications thereof.
Claims (15)
1. A limit stop device for an elevator system is characterized by comprising an overhaul limit unit and a stop unit; the maintenance limiting unit comprises a limit switch and a collision bow; the stopping unit comprises a driver, a driver start-stop trigger device, a base and a collision plate; the base is arranged at the top or the bottom of the car, and the striking plate is movably connected to the base to rotate between a first position and a second position relative to the base through the driving of the driver; one of the limit switch and the impact bow is arranged on a guide rail or at a preset height on a well, and the other of the limit switch and the impact bow is arranged on the impact plate; when the collision plate is at the first position, the elevator system is in a normal operation state, and the limit switch does not collide with the collision bow along with the travel of the elevator; the elevator system is in a service state when the striker plate is in the second position, and the limit switch meets the striker bow and collides with the striker bow as the elevator travels to stop the elevator at the predetermined height.
2. The limit stop device for an elevator system according to claim 1, wherein the stop unit further comprises a baffle provided on the guide rail and near the limit switch or the pantograph provided on the guide rail or the hoistway.
3. The limit stop device for an elevator system according to claim 2, wherein the striker is capable of colliding with the guard to stop the traveling of the elevator as the elevator travels when the striker is in the second position, the guard includes a connecting plate connected to the guide rail and a guard plate connected to an end of the connecting plate opposite to the striker, and a shock absorber is provided on a surface of the guard plate opposite to the striker.
4. The limit stop device for an elevator system according to claim 1 or 2, wherein the striking plate includes a top plate and two side plates connected to both ends of the top plate, respectively, the two side plates being rotatably connected to the base, the side plates of the striking plate being connected to the driver to drive the striking plate to rotate between the first position and the second position.
5. The limit stop device for an elevator system according to claim 4, wherein the striking plate is provided with a connection stopper, the base is provided with an engaging member corresponding to the connection stopper, and the connection stopper is engaged to the engaging member when the striking plate is in the first position.
6. The limit stop device for an elevator system according to claim 5, wherein the engaging member is a magnet, and the connection stopper is engaged with the magnet when the striking plate is at the first position.
7. The limit stop device for an elevator system according to claim 4, wherein the base is provided with a motor attachment hole, and an output shaft of the driver is connected to one side plate of the striking plate through a transmission mechanism through the motor attachment hole to drive the striking plate to rotate between the first position and the second position.
8. The limit stop device for an elevator system according to claim 7, wherein the base is provided with two lugs corresponding to the two side plates, the lugs are provided with base pin hole, the lower parts of the side plates are provided with side plate pin hole, and the side plates are rotatably connected with the lugs on the base through pin shafts.
9. The limit stop device for an elevator system according to any one of claims 1 to 3, wherein the stop unit further comprises a status switch provided on or near the striker plate to detect a position of the striker plate.
10. The limit stop apparatus for an elevator system according to any one of claims 1 to 3, wherein the service limit unit further comprises a cabinet call down or up emergency electric operation switch installed in the control cabinet to control operation of the elevator when the elevator system is in a service state.
11. The limit stop device for an elevator system according to claim 4, wherein an upper portion of the guide rail is provided with a first striker and a first baffle, the first striker being located below the first baffle; a second collision bow and a second baffle are arranged at the lower part of the guide rail, and the second collision bow is positioned above the second baffle; the striking plate is provided with a first limit switch corresponding to the first striking bow and a second limit switch corresponding to the second striking bow, and the first limit switch is positioned above the second limit switch.
12. The limit stop for an elevator system according to claim 11, wherein a bottom of a side plate of the striker plate is provided with a notch and/or a top of the second baffle plate is provided with a notch.
13. A limit stop device for an elevator system as defined in claim 10, wherein the drive start stop trigger is configured to notify the drive to perform an action, the drive start stop trigger being implemented by one of:
the hall door lock switch is excited for a specified number of times within a preset time, the control system informs the driver to drive the collision plate to rotate to the second position, and the elevator system reaches a maintenance state; the hoistway door lock switch obtains excitation of different times from the appointed times within preset time, the control system informs the driver to drive the collision plate to rotate to the first position, and the elevator system is reset to a normal running state;
a pedal is arranged on the front side of the car roof, a switch and a buckle are connected below the pedal, the buckle clamps the pedal when the pedal is stepped down, the control system informs a driver to drive the collision plate to rotate to the second position, and the elevator system reaches a maintenance state; after the overhaul is finished, the buckle is opened, the control system informs the driver to drive the collision plate to rotate to the first position, and the elevator system is reset to a normal running state;
the elevator system comprises a car top, a control system, a driver, a car top, a car bottom, a car top, a car top, a car top, a car top, a car top; after the overhaul is finished, when the maintainer leaves the car roof, the cloth belt is inserted into the stand column again, the switch is disconnected, the control system informs the driver to drive the collision plate to rotate to the first position, and the elevator system is reset to a normal operation state.
14. Method for achieving positive stop of an elevator system with a positive stop device for an elevator system according to the preceding claim, comprising the steps of:
the control system detects that the collision plate of the preventing unit is at the first position through the state switch, the elevator system is in a normal running state, and the elevator can continue to normally run along with the fact that the collision does not occur when the travel limit switch of the elevator meets the collision bow;
when a maintainer needs to enter a car roof or a pit for maintenance, a driver is triggered through a driver start-stop trigger device to enable the driver to drive a collision plate to rotate to a second position, an elevator system is in a maintenance state, a safety circuit is disconnected when a travel limit switch of the elevator collides with a collision bow, the elevator stops, and the elevator cannot continue to travel, so that the elevator stops at a preset height;
when the overhaul is finished, the overhaul personnel start and stop the trigger device through the driver and trigger the driver, so that the driver drives the collision plate to rotate to the first position, and the elevator system resets to a normal operation state.
15. The method of claim 14, wherein the striking plate is in the second position and the elevator system is in a service state, and when the elevator cannot be effectively stopped due to a failure to stop the operation of the elevator by the collision of the limit switch and the striking bow, the travel of the elevator can be stopped by the striking plate colliding with the blocking plate as the elevator continues to travel, stopping the elevator at a height sufficient to protect a service person on the ceiling or the pit bottom.
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| CN202010534660.3A CN113800349B (en) | 2020-06-12 | 2020-06-12 | Limiting and stopping device for elevator system and limiting and stopping method for elevator system |
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| CN202010534660.3A CN113800349B (en) | 2020-06-12 | 2020-06-12 | Limiting and stopping device for elevator system and limiting and stopping method for elevator system |
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| CN113800349B (en) | 2024-07-09 |
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