CN113322921B - Ship lift safety mechanism dismantling method - Google Patents

Ship lift safety mechanism dismantling method Download PDF

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Publication number
CN113322921B
CN113322921B CN202110744100.5A CN202110744100A CN113322921B CN 113322921 B CN113322921 B CN 113322921B CN 202110744100 A CN202110744100 A CN 202110744100A CN 113322921 B CN113322921 B CN 113322921B
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China
Prior art keywords
safety mechanism
ship lift
servo motor
cable
speed reducer
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CN202110744100.5A
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CN113322921A (en
Inventor
闫晓青
齐俊麟
郑卫力
李然
金锋
汤伟毕
向化雄
龚国庆
游强
杨靖
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Three Gorges Navigation Authority
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Three Gorges Navigation Authority
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02C—SHIP-LIFTING DEVICES OR MECHANISMS
    • E02C5/00—Mechanisms for lifting ships vertically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C11/00—Trolleys or crabs, e.g. operating above runways
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/48—Automatic control of crane drives for producing a single or repeated working cycle; Programme control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
    • B66C9/14—Trolley or crane travel drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/08—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Ocean & Marine Engineering (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Control And Safety Of Cranes (AREA)
  • Jib Cranes (AREA)

Abstract

A method for dismantling a safety mechanism of a ship lift comprises a servo motor driven mechanical synchronizing device, a control cabinet, a winch hoist, a winding drum and a limiting detection device. The winding drum is wound with a cable, the cable is connected with a servo motor to drive a mechanical synchronizing device, the winding drum is connected with a control cabinet, the winch hoist is connected with the control cabinet, and the limiting detection device is connected with the tail end of the cable on the winding drum. By using the method for dismantling the safety mechanism of the ship lift, the workload of construction can be reduced to a great extent, labor is saved, the utilization rate of a winch hoist in a system can be effectively improved by driving the mechanical synchronizing device to be put into and cut off through the servo motor, the operation and installation method is simple, and the safety of dismantling and overhauling of the safety mechanism of the ship lift is improved.

Description

Ship lift safety mechanism dismantling method
Technical Field
The invention discloses a method for dismantling a safety mechanism of a ship lift, and relates to the technical field of maintenance of the safety mechanism of the ship lift of a hub navigation building.
Background
At present, with the rapid development of the fields of large-scale building, hydro-junction, hydraulic machinery and the like, particularly the construction of a large-scale ship lift adopting a scheme of 'long nut-short screw safety guarantee', the technical research on the operation, maintenance and overhaul of the ship lift is quite deficient. Generally, during the construction period of a ship lift, a plurality of idler wheels arranged in an ascending spiral line and a nut column spiral track surface contact are arranged on the outer wall of a short screw rod of a tooling adopted during the installation of a safety mechanism of the ship lift, the self-weight falling mode of the safety mechanism is carried out, the whole installation process of the safety mechanism needs to be carried out by suspending a manned cage through a crane and track the inspection state in real time along with the falling of the safety mechanism, when the safety mechanism falls to the position close to the installation position by about 2-2.5 meters, the tooling needs to be dismantled for manual barring to the installation position, the installation efficiency is low, the safety risk in the installation process is large, however, the working condition difference is large when the safety mechanism is dismantled, overhauled and installed, and the method for dismantling and overhauling the safety mechanism is not available at present.
Therefore, based on the above analysis, it is necessary to develop and design a new system for disassembling and assembling the safety mechanism of the ship lift, so as to facilitate the disassembly, assembly, and maintenance of the safety mechanism.
Disclosure of Invention
The invention provides a system and a method for disassembling and assembling a safety mechanism of a ship lift, which have the advantages of high automation level, and can improve the efficiency of disassembling and assembling the safety mechanism of the ship lift, reduce safety risks and reduce labor force.
The technical scheme adopted by the invention is as follows:
a ship lift safety mechanism dismounting system comprises a servo motor driving mechanical synchronizing device, a control cabinet, a winch hoist, a winding drum and a limiting detection device. The winding drum is wound with a cable, the cable is connected with a servo motor to drive a mechanical synchronizing device, the winding drum is connected with a control cabinet, the winch hoist is connected with the control cabinet, and the limiting detection device is connected with the tail end of the cable on the winding drum.
The servo motor driving mechanical synchronizing device comprises a servo motor, a first speed reducer, a disc-shaped gear coupling and a fixed seat. The output shaft of the servo motor is connected with a first speed reducer, the output shaft of the first speed reducer is connected with a driving device of the ship lift safety mechanism through a disc-shaped tooth coupling, the fixed seat is fixedly installed on the lower guide frame, and the servo motor and the first speed reducer are installed on the fixed seat.
The winch hoist comprises a cart frame, a trolley frame, a walking track, a first variable frequency motor, a second speed reducer, a steel wire rope reel, a movable pulley, a lifting hook, a stroke encoder, a fixed pulley, a cable following device and a trolley driving assembly. The cart frame is provided with a walking track, the walking track is provided with a cart frame, the cart frame is connected with a cart driving assembly, the cart frame is provided with a first variable frequency motor, the first variable frequency motor is connected with a steel wire rope winding drum through a second speed reducer, a steel wire rope is wound on the steel wire rope winding drum, the telescopic end of the steel wire rope is provided with a movable pulley, the movable pulley is connected with a lifting hook, the upper end of the steel wire rope is provided with a fixed pulley, the fixed pulley is installed on the cart frame, and the cart frame is provided with a cable following device. The second speed reducer is provided with a stroke encoder and is used for acquiring lifting or descending height data of the winch hoist in real time.
The winding drum comprises a second variable frequency motor, a third speed reducer and a cable reel; the second variable frequency motor is connected with a cable reel through a third speed reducer, and a cable is wound on the cable reel.
The limit detection device comprises an annular sliding contact track, a contact, a sensor support and a proximity switch. The annular sliding contact rail is positioned on the lower end face of the lower guide frame and is coaxial with the rotating screw rod, the annular sliding contact rail is connected with a terminal cable of the cable drum, the bottom of the contact is installed in a sliding groove of the annular sliding contact rail, the top of the contact is fixed on the sensor support, the base of the sensor support is installed on the lower end face of the rotating screw rod, and the height and the direction of the sensor support can be adjusted; the two proximity switches are arranged on the mounting hole at the top of the sensor support, and the end faces of the two proximity switches are respectively vertical to the upper thread face and the lower thread face of the nut column; when the rotating screw rod rotates, the sensor support is driven to rotate synchronously, the contact head rotates synchronously on the annular sliding contact track, and the proximity switch on the sensor support rotates synchronously.
The system also comprises an operation console, and the operation console is connected with the control cabinet. The operation control console is provided with a liquid crystal display screen, a gear shifting handle, an operation button and an emergency stop button.
The control cabinet comprises a PLC controller, and the PLC controller is respectively connected with a servo motor driving mechanical synchronization device, an operation console, a limit detection device and a stroke encoder; the PLC is also respectively connected with a first variable frequency motor of the winch hoist and a second variable frequency motor of the winding drum.
The servo motor driven mechanical synchronizing device is provided with a manual turning handle and used for accurately adjusting the gap between the thread of the rotating screw and the groove tread of the nut column through manual intervention operation.
The invention discloses a ship lift safety mechanism dismounting system and a dismounting method, which have the following technical effects:
1. through adopting split type servo motor drive mechanical synchronization device, hoist formula headstock gear, spacing detection device, hoist formula headstock gear fixed mounting is in ship lift top computer lab, and servo motor drive mechanical synchronization device targets in place with spacing detection device installation when the safety mechanism dismouting, and when servo motor drive mechanical synchronization device and stop device installed, accessible hoist formula headstock gear hoisted, and to a great extent has reduced the hoist and mount degree of difficulty and the equipment degree of difficulty.
2. Through installing spacing detection device on ship lift safety mechanism's lower leading truck, through the automatic judgement of sensing detection system, avoid carrying out real time state tracking through manned hanging flower basket to safety mechanism dismouting process, reduced the safety risk of work progress.
3. Through installing spacing detection device at ship lift safety mechanism's lower leading truck, dismantle at safety mechanism and promote and install whereabouts in-process, if take place hoist formula headstock gear lifting speed and when safety mechanism rotating screw rod is asynchronous to lead to the card to hinder, can report to the police in advance and shut down, the reaction is sensitive, avoids because the equipment that the card hinders and lead to damages, has improved the security of construction, has guaranteed the smooth and easy of dismouting system in whole work progress.
4. The servo motor driving mechanical synchronizing device of the dismounting system can be conveniently dismounted and assembled, so that the dismounting process of a plurality of ship lift safety mechanisms can be repeatedly utilized, the labor amount of system installation is saved, the labor intensity is reduced, and the construction period is shortened.
5. The servo motor driving mechanical synchronizing device and the limiting detection device of the dismounting system can be conveniently put into and removed, the dismounting construction of the safety mechanism is carried out when the dismounting system is overhauled, the operation of the safety mechanism is removed at other time, the winch hoist can independently work, other equipment overhauling and hoisting work is carried out, the utilization rate of the winch hoist is greatly improved, and the investment of equipment maintenance cost is saved.
6. The servo motor driving mechanical synchronizing device of the dismounting system has the advantages that the coupling is simply and quickly mounted through the disc-shaped gear coupling, and the dismounting system is adopted, so that the structure of the driving shaft coupling of the original safety mechanism is not required to be broken and replaced during mounting, the integrity of original equipment is guaranteed, and the construction quality is improved.
7. The servo motor drives the mechanical synchronizing device to be provided with a manual turning handle, and the gap between the screw teeth of the rotating screw and the groove tread of the nut column can be accurately adjusted through manual intervention operation.
8. The disassembly and assembly method is convenient and reliable, can smoothly complete the one-time disassembly and assembly of the safety mechanism of the ship lift with higher lifting height, avoids the defects of repeated disassembly and assembly of the tool and manual turning in the disassembly and assembly process of the safety mechanism, further improves the construction efficiency and the construction safety, is simple to operate, and can also realize manual automatic control.
Drawings
Fig. 1 is a schematic view of the overall structure of the disassembling and assembling system according to the present invention.
FIG. 2 is a schematic structural diagram of a servo motor driven mechanical synchronizer of the dismounting system of the present invention.
FIG. 3 is a schematic view of the overall structure of the disassembling and assembling system of the present invention.
Fig. 4 is a schematic view of the reel structure of the disassembling and assembling system of the present invention.
FIG. 5 is a schematic view of an operating console of the system for assembling and disassembling according to the present invention.
Fig. 6 is a schematic structural view of a limit detection device of the dismounting system of the present invention.
Fig. 7 is a block diagram of the electrical control principle of the present invention.
Fig. 8 is a schematic view of the mounting arrangement of the safety mechanism of the ship lift.
Fig. 9 is a schematic structural view of a cable follower device.
Wherein:
1-a servo motor driving mechanical synchronizing device, 2-a control cabinet, 3-a winch hoist, 4-a winding drum, 5-an operation console, 6-a limit detection device, 7-a lower guide frame, 8-a driving device of a ship lift safety mechanism, 9-a rotating screw rod and 10-a PLC controller; 11-nut column, 12-slip ring bearing, 13-universal coupling, 14-support rod, 15-bevel gear box, 16-spherical hinge, 17-safety beam, 18-upper guide frame;
101-a servo motor, 102-a first speed reducer, 103-a disc-shaped gear coupling and 104-a fixed seat;
301-a cart frame, 302-a cart frame, 303-a walking track, 304-a first variable frequency motor, 305-a second speed reducer, 306-a steel wire rope, 307-a steel wire rope reel, 308-a movable pulley, 309-a hook, 310-a stroke encoder, 311-a fixed pulley, 312-a cable following device and 313-a cart driving assembly;
401-a second variable frequency motor, 402-a third speed reducer and 403-a cable reel;
501-a liquid crystal display screen, 502-a gear shifting handle, 503-an operation button and 504-an emergency stop button;
601-annular sliding contact track, 602-contact, 603-sensor support, 604-proximity switch;
3121-track, 3122-connecting element, 3123-follower, 3124-cable.
Detailed Description
As shown in fig. 1 to 8, a system for dismounting a safety mechanism of a ship lift comprises a servo motor driven mechanical synchronization device 1, a control cabinet 2, a winch hoist 3, a winding drum 4 and a limit detection device 6.
The winding drum 4 is wound with a cable, the cable is connected with the servo motor to drive the mechanical synchronizing device 1, the winding drum 4 is connected with the control cabinet 2 through the cable of the cable following device 312, the winch hoist 3 is connected with the control cabinet 2 through the cable of the cable following device 312, and the limiting detection device 6 is connected with the tail end of the cable on the winding drum 4.
The servo motor driven mechanical synchronizer 1 comprises a servo motor 101, a first speed reducer 102, a disc-shaped tooth coupling 103 and a fixed seat 104. An output shaft of the servo motor 101 is connected with a first speed reducer 102, an output shaft of the first speed reducer 102 is connected with a driving device 8 of the ship lift safety mechanism through a disc-shaped tooth coupling 103, the fixed seat 104 is fixedly installed on the lower guide frame 7, and the servo motor 101 and the first speed reducer 102 are installed on the fixed seat 104.
When the ship lift safety mechanism is detached, lifted and mounted and falls down, the servo motor drives the mechanical synchronizer 1 to drive the rotary screw 9 of the ship lift safety mechanism to rotate at an angular speed omega1And (4) rotating.
The hoisting hoist 3 comprises a cart frame 301, a trolley frame 302, a traveling track 303, a first variable frequency motor 304, a second speed reducer 305, a steel wire rope 306, a steel wire rope reel 307, a movable pulley 308, a lifting hook 309, a stroke encoder 310, a fixed pulley 311, a cable following device 312 and a trolley driving assembly 313. The cart frame 301 is provided with a traveling track 303, the traveling track 303 is provided with a cart frame 302, the cart frame 302 is connected with a cart driving assembly 313, the cart frame 302 is provided with a first variable frequency motor 304, the first variable frequency motor 304 is connected with a steel wire rope reel 307 through a second speed reducer 305, the steel wire rope reel 307 is wound with a steel wire rope 306, the telescopic end of the steel wire rope 306 is provided with a movable pulley 308, the movable pulley 308 is connected with a lifting hook 309, the upper end of the steel wire rope 306 is provided with a fixed pulley 311, the fixed pulley 311 is installed on the cart frame 302, and the cart frame 301 is provided with a cable following device 312. The second speed reducer 305 is provided with a stroke encoder 310, and can collect the coil in real timeThe lifting or lowering height data of the hoist 3 is obtained by the hoist 3 at a speed v when the safety mechanism of the ship lift is disassembled and assembled2Lifting or dropping the safety mechanism.
The cable following device 312 comprises a track 3121, a connecting member 3122 and a plurality of following bodies 3123, the track 3121 is fixedly installed on the cart frame 301, the following bodies 3123 are provided with four groups of rollers, the rollers are installed in a groove structure on the track 3124 to ensure that the following bodies 3123 move back and forth on the track 3121, the cable 3124 is fixed on the following bodies 3123, and the length of the cable between each following body 3123 is fixed. The first follower is fixed with the trolley frame 302 through a connecting piece 3122, when the trolley moves forwards, the first follower moves synchronously and drives the cable to move, when the cable between the first follower and the adjacent second follower is pulled, the second follower is driven to move forwards through the cable, and similarly, the cable is driven to move till the last follower; when the trolley moves backwards, the first follower moves synchronously and drives the cable to move, and when the first follower is in contact with the adjacent second follower, the first follower pushes the second follower to move, and in the same way, the first follower moves until the last follower moves.
The winding drum 4 comprises a second variable frequency motor 401, a third speed reducer 402 and a cable reel 403; the second inverter motor 401 is connected to a cable reel 403 via a third speed reducer 402, and a cable is wound around the cable reel 403. The winding drum 4 is used for winding and unwinding cables for the servo motor driving mechanical synchronizing device 1 and the limiting detection device 6 when the ship lift safety mechanism is detached, lifted, installed and dropped.
The limit detection device 6 comprises an annular sliding contact track 601, a contact 602, a sensor bracket 603 and a proximity switch 604. The annular sliding contact track 601 is positioned on the lower end face of the lower guide frame 7 and is coaxial with the rotating screw 9, the annular sliding contact track 601 is connected with a tail end cable of the winding drum 4, the bottom of the contact 602 is installed in a sliding groove of the annular sliding contact track 601, the top of the contact 602 is fixed on the sensor support 603, the base of the sensor support 603 is installed on the lower end face of the rotating screw 9, and the height and the direction of the sensor support 603 can be adjusted; two proximity switches 604 are arranged on an installation hole at the top of the sensor bracket 603, and the end surfaces of the two proximity switches 604 are respectively vertical to the upper and lower thread surfaces of the nut column 11; when the rotating screw 9 rotates, the sensor bracket 603 is driven to rotate synchronously, the contact 602 rotates synchronously on the annular sliding contact track 601, and the proximity switch 604 on the sensor bracket 603 rotates synchronously.
The system further comprises an operating console 5, the operating console 5 being connected to the control cabinet 2. The operation console 5 is provided with a liquid crystal display 501, a shift knob 502, an operation button 503, and an emergency stop button 504. And the operation control console 5 is used for operating and controlling the synchronous operation of the disassembly and assembly system of the ship lift safety mechanism. When the operation console 5 is used for dismounting the ship lift safety mechanism, the highest operation gear is the first gear, and the operation speed v is2When the non-safety mechanism is disassembled and assembled, the servo motor driven mechanical synchronizer 1 is in a cutting state, the maximum operation gear of the independent work of the winch hoist 3 is five, and the operation speed v is 0.05m/s1＝0.15m/s。
The control cabinet 2 comprises a PLC (programmable logic controller) 10, and the PLC 10 is respectively connected with a servo motor driving mechanical synchronizing device 1, an operation control console 5, a limiting detection device 6 and a stroke encoder 310; the PLC controller 10 is further connected to the first inverter motor 304 of the hoist 3 and the second inverter motor 401 of the reel 4, respectively.
The servo motor driven mechanical synchronization device 1 is provided with a manual turning handle for manually intervening to accurately adjust the gap between the thread of the rotating screw 9 and the groove tread of the nut column 11.
A method for disassembling and assembling a safety mechanism of a ship lift comprises the following steps:
step 1): the lifting hook 309 of the winch hoist 3 is firmly connected with four lifting lugs of the ship lift safety mechanism through a hoisting steel wire rope, the winch hoist 3 is started, the lifting hook 309 is stressed, and the hoisting steel wire rope is tensioned;
step 2): removing a universal coupling at the end of the synchronous shaft and a driving shaft coupling of a lower guide frame 7 of a ship lift safety mechanism, and connecting a servo motor driving mechanical synchronizing device 1 with the driving shaft of the lower guide frame 7 of the ship lift safety mechanism through a disc-shaped gear coupling;
step 3): a support ring is arranged between the support rod and an inner hole at the lower end of the rotary screw 9, the support rod and the rotary screw 9 are tightly propped, the gap is eliminated, and the support rod is prevented from moving and deviating relative to the rotary screw 9 in the process of assembling and disassembling the safety mechanism of the ship lift;
step 4): adjusting the position of a sensor bracket 603 of the limit detection device 6 to enable the gap between a proximity switch 604 probe and the upper and lower tread surfaces of the groove of the nut column 11 to reach a set value, and driving a servo motor 101 to drive the mechanical synchronization device 1 to be put into use;
step 5): dismantling a supporting rod spherical hinge of the ship lift safety mechanism and a safety cross beam connecting bolt to separate the ship lift safety mechanism from a ship receiving chamber of the ship lift;
step 6): the safety mechanism of the ship lift is disassembled and lifted, enters a lifting operation interface, checks whether each switch and signal are normal or not, operates the system through the gear shifting handle 502 to carry out first-gear lifting action, and the winch hoist 3 is lifted at the speed v2Lifting operation, servo motor driving mechanical synchronizer 1 at angular velocity omega1The rotating screw 9 with the ascending spiral thread is driven to rotate synchronously in the anticlockwise direction, so that the rotating screw 9 and the nut column 11 are prevented from being clamped in the process of disassembling and lifting the safety mechanism of the ship lift;
step 7): during the operation of the system, whether a signal of the proximity switch 604 is normal or not is concerned, if the alarm is stopped, the gap between the thread of the rotating screw 9 and the upper and lower tread surfaces of the groove of the nut post 11 is checked on site, and if the gap deviation is overlarge, the servo motor 101 is operated forwards or reversely through manual coiling to adjust the gap between the thread of the rotating screw 9 and the groove of the nut post 11;
step 8): after the clearance adjustment is finished, the first-gear lifting operation is recovered until the ship lift safety mechanism is lifted out of the nut column 11;
step 9): the safety mechanism of the ship lift descends to enter a descending operation interface, whether each switch and signal are normal or not is checked, the operation system performs first-gear descending action through the gear shifting handle, and the winch hoist 3 descends at speed v2Descending operation, in which the servo motor drives the mechanical synchronisation device 1 at an angular velocity omega1Clockwise driving a rotating screw 9 with a thread exhibiting a rising helixSynchronously rotating;
step 10): during the descending operation process of the ship lift safety mechanism, whether a system approach switch 604 signal is normal or not is concerned, if the alarm is stopped, the gap between the thread of the rotating screw 9 and the upper and lower tread surfaces of the groove of the nut post 11 is checked on site, and if the gap deviation is overlarge, the gap between the thread of the rotating screw 9 and the groove of the nut post 11 is adjusted by the forward or reverse operation of the manual coiling servo motor 101;
step 11): after the clearance adjustment is finished, restoring the first-gear descending operation until a support rod ball hinge of the ship lift safety mechanism falls to a safety cross beam flange mounting flange, stopping the system, observing the accurate alignment of a support rod ball hinge flange bolt hole of the ship lift safety mechanism and a cabin safety cross beam flange bolt hole, and if the bolt holes are staggered, adjusting the alignment of the safety mechanism ball hinge flange bolt hole and the cabin safety cross beam flange bolt hole through manually driving a servo motor 101 by a reverse-time needle dial;
step 12): and (3) connecting a spherical hinge of the reloading safety mechanism with a safety cross beam, finely adjusting the gap between the thread of the rotating screw 9 and the groove tread of the nut column 11, removing the servo motor driven mechanical synchronizing device 1 and the limiting detection device 6, and reloading the universal coupling.
Furthermore, the servo motor driven mechanical synchronization device 1 is provided with a manual turning handle, and the gap between the screw teeth of the rotating screw and the groove tread of the nut column can be accurately adjusted through manual intervention operation.
Further, the servo motor drives the mechanical synchronizer 1 to be in a cutting state when the non-safety mechanism is disassembled and assembled, and the winch hoist can independently work to perform hoisting and maintenance tasks on other equipment of the ship lift.
Further, when the safety mechanism is dismounted and mounted on the operation console 5, the highest operation gear is the first gear, and the operation speed v is2When the non-safety mechanism is disassembled and assembled, the servo motor driven mechanical synchronizer 1 is in a cutting state, the maximum operation gear of the independent work of the winch hoist 3 is five, and the operation speed v is 0.05m/s1＝0.15m/s。
By using the safety mechanism dismounting system and the operation method thereof, the construction workload can be reduced to a great extent, the labor is saved, the utilization rate of the winch hoist 3 in the system can be effectively improved by driving the mechanical synchronization device 1 to be put into and cut off through the servo motor, the operation and installation method is simple, and the safety of dismounting and maintenance of the safety mechanism of the ship lift is improved.

Claims (1)

1. A method for dismantling a safety mechanism of a ship lift is characterized by comprising a system for dismantling the safety mechanism of the ship lift, wherein the system comprises:
the servo motor drives a mechanical synchronizing device (1), a control cabinet (2), a winch hoist (3), a winding drum (4) and a limit detection device (6);
the servo motor driven mechanical synchronizing device (1) comprises a servo motor (101), a first speed reducer (102), a disc-shaped tooth coupling (103) and a fixed seat (104);
an output shaft of the servo motor (101) is connected with a first speed reducer (102), an output shaft of the first speed reducer (102) is connected with a driving device (8) of a ship lift safety mechanism through a disc-shaped tooth coupling (103), the fixed seat (104) is fixedly installed on the lower guide frame (7), and the servo motor (101) and the first speed reducer (102) are installed on the fixed seat (104);
the hoisting hoist (3) comprises a cart frame (301), a trolley frame (302), a walking track (303), a first variable frequency motor (304), a second speed reducer (305), a steel wire rope (306), a steel wire rope winding drum (307), a movable pulley (308), a lifting hook (309), a stroke encoder (310), a fixed pulley (311), a cable following device (312) and a trolley driving assembly (313);
a travelling track (303) is arranged on a cart frame (301), a cart frame (302) is arranged on the travelling track (303), the cart frame (302) is connected with a cart driving assembly (313), a first variable frequency motor (304) is installed on the cart frame (302), the first variable frequency motor (304) is connected with a steel wire rope reel (307) through a second speed reducer (305), a steel wire rope (306) is wound on the steel wire rope reel (307), a movable pulley (308) is arranged at the telescopic end of the steel wire rope (306), the movable pulley (308) is connected with a lifting hook (309), a fixed pulley (311) is arranged at the upper end of the steel wire rope (306), the fixed pulley (311) is installed on the cart frame (302), and the cart frame (301) is provided with a cable following device (312); the second speed reducer (305) is provided with a stroke encoder (310) and is used for acquiring lifting or descending height data of the winch hoist (3) in real time;
the winding drum (4) comprises a second variable frequency motor (401), a third speed reducer (402) and a cable reel (403); the second variable frequency motor (401) is connected with a cable reel (403) through a third speed reducer (402), and a cable is wound on the cable reel (403);
the limit detection device (6) comprises an annular sliding contact track (601), a contact (602), a sensor bracket (603) and a proximity switch (604);
the annular sliding contact rail (601) is positioned on the lower end face of the lower guide frame (7) and is coaxial with the rotating screw (9), the annular sliding contact rail (601) is connected with a tail end cable of the winding drum (4), the bottom of the contact (602) is installed in a sliding groove of the annular sliding contact rail (601), the top of the contact (602) is fixed on the sensor support (603), the base of the sensor support (603) is installed on the lower end face of the rotating screw (9), and the height and the direction of the sensor support (603) can be adjusted; the two proximity switches (604) are arranged on an installation hole at the top of the sensor bracket (603), and the end surfaces of the two proximity switches (604) are respectively vertical to the upper and lower thread surfaces of the nut column (11); when the rotary screw rod (9) rotates, the sensor support (603) is driven to rotate synchronously, the contact (602) rotates synchronously on the annular sliding contact track (601), and the proximity switch (604) on the sensor support (603) rotates synchronously;
the dismantling method comprises the following steps:
step 1): connecting a lifting hook (309) of the hoisting hoist (3) with a lifting lug of a ship lift safety mechanism through a hoisting steel wire rope, starting the hoisting hoist (3), enabling the lifting hook (309) to run upwards to bear force, and tensioning the hoisting steel wire rope;
step 2): a universal coupling at the end of the synchronous shaft and a drive shaft coupling of a lower guide frame (7) of a ship lift safety mechanism are removed, and a servo motor driving mechanical synchronizing device (1) is connected with a drive shaft of the lower guide frame (7) of the ship lift safety mechanism through a disc-shaped gear coupling;
step 3): a support ring is arranged between the support rod and an inner hole at the lower end of the rotary screw rod (9) to tightly push the support rod and the rotary screw rod (9), so that a gap is eliminated, and the support rod is prevented from moving and deviating relative to the rotary screw rod (9) in the process of assembling and disassembling the safety mechanism of the ship lift;
step 4): adjusting the position of a sensor bracket (603) of a limit detection device (6) to enable the gap between a proximity switch (604) probe and the upper and lower tread surfaces of a groove of a nut column (11) to reach a set value, and driving a servo motor (101) to drive a mechanical synchronization device (1) to be put into operation;
step 5): dismantling a supporting rod spherical hinge of the ship lift safety mechanism and a safety cross beam connecting bolt to separate the ship lift safety mechanism from a ship receiving chamber of the ship lift;
step 6): the safety mechanism of the ship lift is disassembled and lifted, the ship lift enters a lifting operation interface, whether each switch and signal are normal or not is checked, a first-gear lifting action is carried out through a gear shifting handle (205) operation system, a winch hoist (3) is lifted and operated at a speed, a servo motor drives a mechanical synchronization device (1) to drive a rotating screw rod (9) with a lifting spiral thread to synchronously rotate in an anticlockwise direction at an angular speed, and the rotating screw rod (9) and a nut column (11) are prevented from being clamped in the disassembling and lifting process of the safety mechanism of the ship lift;
step 7): during the operation of the system, whether a signal of a proximity switch (604) is normal or not is concerned, if the alarm is stopped, the gap between the thread of a rotating screw (9) and the upper and lower tread surfaces of the groove of a nut post (11) is checked on site, and if the gap deviation is overlarge, the gap between the thread of the rotating screw (9) and the groove of the nut post (11) is adjusted by the forward or reverse operation of a manual disc servo motor (101);
step 8): after the clearance adjustment is finished, the first-gear lifting operation is resumed until the ship lift safety mechanism is lifted out of the nut column (11).
CN202110744100.5A 2020-04-24 2020-04-24 Ship lift safety mechanism dismantling method Active CN113322921B (en)

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