CN212454308U - Device for quickly disassembling and assembling and placing hook guide and hydraulic elevator positioning device - Google Patents
Device for quickly disassembling and assembling and placing hook guide and hydraulic elevator positioning device Download PDFInfo
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- CN212454308U CN212454308U CN202021402383.2U CN202021402383U CN212454308U CN 212454308 U CN212454308 U CN 212454308U CN 202021402383 U CN202021402383 U CN 202021402383U CN 212454308 U CN212454308 U CN 212454308U
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Abstract
The utility model relates to a quick assembly disassembly and device of placing hook direction and hydraulic elevator positioner belongs to the supporting equipment technical field of the drilling and workover rig that the oil was equipped. It is by horizontal guide rail, horizontal dolly, moving guide, dismouting platform, hydraulic pressure elevator tray, rings fixing device etc. constitute, the utility model discloses after the bull hook direction accomplished the brill or connect to unload the tubular column operation with hydraulic pressure elevator positioner, need not to place alone behind bull hook direction and the whole dismantlements of hydraulic pressure elevator positioner, only need the workman break away from the car hook with the bull hook otic placode and rings on the guiding orientation mechanism on the dismouting bench, place the hydraulic pressure elevator on hydraulic pressure elevator tray, with rings and moving guide fixed back, with moving guide together wholly after move to place the position can, it is convenient to use safety save time. The problem of current hook direction and hydraulic elevator positioner can accomplish dismantlement or installation work through several hours, and the during operation has very big life safety risk and equipment to damage the risk has thoroughly been solved.
Description
Technical Field
The utility model relates to a quick assembly disassembly and device of placing hook direction and hydraulic elevator positioner belongs to the supporting equipment technical field of the drilling and workover rig that the oil was equipped.
Background
The hook guide and hydraulic elevator positioning device is an automatic matching tool used by the drilling and workover rig during tripping operation and pipe column receiving and unloading operation, is suitable for the drilling and workover rig which is not provided with a top drive, and is particularly suitable for a drilling machine and an offshore platform drilling and workover rig which are provided with automatic tools such as a racking platform manipulator, a power slip, a power rat hole, a power catwalk and the like; the main function is to ensure the stability and position controllability of a traveling block hook, a hydraulic elevator and a pipe column under the conditions of strong wind, emergency brake and the like in the process of tripping, and avoid the phenomenon that the pipe column is buckled with disordered teeth due to shaking and inclining. To the higher rig that adopts racking platform manipulator, power slips, power rat hole and power catwalk's degree of automation, the device can ensure that the state of hydraulic elevator is controllable and also can remain stable position when handing over with racking platform manipulator and receiving horizontal exogenic action, also can rely on the integrated control system that the automation was equipped to deliver hydraulic elevator to other handing-over positions such as rat hole, catwalk to realize state control, thereby realize the high-efficient cooperation of multiple automation instrument and guarantee operation safety.
The prior art basically realizes the functions of guiding, positioning, position and state control and the like of the hydraulic elevator, and plays a good role in the operations of tripping, connecting and disconnecting a pipe column and the like. However, when the operations of tripping the drill pipe, connecting and disconnecting the pipe column and the like are finished and normal drilling operation is required, the hook guide and hydraulic elevator positioning device must be removed from the well head working area, main components such as a guide positioning mechanism, a lifting ring, a hydraulic elevator and the like must be lifted and disconnected into parts by a small winch and then separately placed, and otherwise, the drilling operation can be blocked or influenced; when the drilling and the pipe string connecting and disconnecting operation need to be carried out again, the installation needs to be carried out again. The single weight of main parts such as hydraulic elevator, rings, guiding orientation mechanism all is about hundreds of kilograms, and the height of main parts dismouting operation such as rings and guiding orientation mechanism also all is about 3 meters, because receive weight, height, the dismouting degree of difficulty and the influence that dismouting part is in large quantity at the field operation in-process, generally need several hours to accomplish dismantlement or installation work, and there are very big life safety risk and equipment to damage the risk in the during operation, consequently, lead to the application of bull hook direction and hydraulic elevator positioner to receive very big restriction.
Disclosure of Invention
An object of the utility model is to provide a can quick assembly disassembly, remove, place the device of bull hook direction and hydraulic elevator positioner, accomplish the back in its operation, can conveniently dismantle fast, remove, place, withdraw from the required operation space of drilling operation, and can conveniently get into operating position and state once more fast when needs trip once more and connect the operation such as unloading the tubular column, can guarantee that bull hook direction and hydraulic elevator positioner are safe, use high-efficiently, thereby improve the operating efficiency at whole drilling operation in-process, alleviate personnel intensity of labour, guarantee operation safety.
The utility model discloses a realize above-mentioned purpose through following technical scheme:
the utility model provides a quick assembly disassembly and place bull hook direction and hydraulic elevator positioner's device, it comprises horizontal guide rail, horizontal dolly, movable guide, dismouting platform, hydraulic elevator tray, tray dead lever, rings fixing device, guiding orientation mechanism fixing base, its characterized in that: the horizontal guide rail is horizontally fixed on a back beam of the derrick, and provides guiding and bearing support for the whole device; the horizontal trolley consists of a trolley frame, rollers, a speed reducer, a motor, a fluted disc, a rack and a control box, wherein the trolley frame is movably arranged on a horizontal guide rail through the rollers, the motor, the speed reducer and the fluted disc are arranged on the trolley frame, the rack is arranged on the horizontal guide rail, the fluted disc is meshed with the rack, and the control box is arranged on a derrick supporting leg and controls the horizontal trolley to walk; the horizontal trolley is hung on the horizontal guide rail by using the roller and is fixedly connected with the movable guide rail, the horizontal trolley is driven by the motor and the speed reducer, and when the horizontal trolley moves back and forth on the horizontal guide rail by using the meshing of the fluted disc and the rack, the movable guide rail is driven to move back and forth and is controlled by the control box; the movable guide rail is characterized in that the two sides of the movable guide rail are provided with dismounting tables, the movable guide rail at the upper parts of the two dismounting tables is provided with a guide positioning mechanism fixing seat and a lifting ring fixing device, the bottom of the guide positioning mechanism fixing seat is fixed on a movable guide rail cross beam, one side of the lifting ring fixing device is hinged with the movable guide rail through a hinge, and when the lifting ring fixing device does not need to fix a lifting ring, the lifting ring fixing device can be rotatably placed at a position which does not influence the operation in; a hydraulic elevator tray and a tray fixing rod are arranged on a movable guide rail between the lower parts of the two disassembling and assembling tables; level and vertical state through tray dead lever transform hydraulic elevator tray, the tray dead lever is through changing to articulate the position and stick up hydraulic elevator tray, lets out the operating space for the well head operation.
The two disassembling and assembling tables, the hydraulic elevator tray, the tray fixing rod, the lifting ring fixing device and the guide positioning mechanism fixing seat move together when the horizontal trolley drives the movable guide rail to move.
The dismounting table consists of a support frame, an inclined strut, a support, a bedplate and a ladder stand rod, wherein the support frame is hinged to one end of the bedplate, the support is hinged to the other end of the bedplate, the ladder stand rod is manufactured on the support, the inclined strut is hinged to the upper end of the support, and the other end of the inclined strut is spliced with the support frame; the dismounting table is hung on the movable guide rail through a support and can be folded and rotate around the movable guide rail.
After the hook guide and the hydraulic elevator positioning device are disassembled, the hydraulic elevator is placed on a hydraulic elevator tray and fixed through a tray fixing rod, the lifting ring is fixed on the movable guide rail through the lifting ring fixing device, the guide positioning mechanism is fixed on the movable guide rail through the guide positioning mechanism fixing seat, and the horizontal trolley drives the movable guide rail, the hydraulic elevator tray, the lifting ring fixing device, the guide positioning mechanism fixing seat and the hook guide to move together with the hydraulic elevator positioning device to a placement position or a working position when moving.
The main structure sizes of the upper part of the movable guide rail and the guide rail of the hook guide and hydraulic elevator positioning device are completely the same, when the horizontal trolley drives the movable guide rail to move to the position connected with the guide rail of the hook guide and hydraulic elevator positioning device, the lower end of the guide rail of the hook guide and hydraulic elevator positioning device is spliced with the upper end of the movable guide rail to form a complete guide rail, and the guide positioning mechanism can move up and down along the complete guide rail.
The motor is one of a hydraulic motor, a pneumatic motor or a motor, and can also be driven to move by adopting an oil cylinder device or the like so as to provide moving power for the horizontal trolley.
The rapid dismounting and placing means that the part directly connected with the hook is dismounted without dismounting the hook guide and the hydraulic elevator positioning device into parts, and then the whole part is moved and transported and placed integrally through the device without using other equipment and tools.
Compared with the prior art, the utility model beneficial effect lie in:
according to the device for quickly disassembling, assembling and placing the hook guide and hydraulic elevator positioning device, after the hook guide and hydraulic elevator positioning device finishes operations such as tripping or pipe column receiving and unloading, the hook guide and hydraulic elevator positioning device does not need to be disassembled into parts and then placed independently, only the guide positioning mechanism needs to be placed on the guide positioning mechanism fixing seat, the hydraulic elevator is placed on the hydraulic elevator tray after the hydraulic elevator tray is placed down, workers separate the lug plate of the guide positioning mechanism and the lifting ring from the hook of the traveling block on a disassembling and assembling table, the lifting ring is fixed with the movable guide rail by the lifting ring fixing device, then the disassembling and assembling table is folded, the horizontal trolley moves along the horizontal guide rail through the operation control box, and the device, the hook guide and hydraulic elevator positioning device are integrally moved back to the placing position for storage without influencing normal operation of other working conditions; can get back to the operation position fast when needs use, be connected guiding orientation mechanism otic placode and rings and tourist car hook, pack up hydraulic elevator tray and rings fixing device alright with going up the operation of drilling down, whole process mainly relies on mechanical power and simple artifical supplementary can realize. The utility model discloses it is safe in utilization save time, generally only need 10 minutes can accomplish the installation or dismantle the work, place the position including getting into work position or immigration. The problem of current hook direction and hydraulic elevator positioner because of receiving weight, height, the dismouting degree of difficulty and the many influence of dismouting part quantity at the field operation in-process, generally need can accomplish the work of dismantling or installing through several hours, have very big life safety risk and equipment damage risk moreover during operation has thoroughly been solved.
Drawings
FIG. 1 is a schematic structural view of a device for quickly disassembling and assembling and placing a hook guide and hydraulic elevator positioning device;
FIG. 2 is a schematic view of a disassembled platform, a hydraulic elevator tray and a lifting ring fixing device of a device for quickly disassembling and assembling and placing a hook guide and hydraulic elevator positioning device after the disassembly platform, the hydraulic elevator tray and the lifting ring fixing device are retracted;
FIG. 3 is a schematic structural view of the assembled horizontal guide rail and horizontal trolley;
FIG. 4 is a structural diagram of the installation position of the control box;
FIG. 5 is a schematic structural view of the horizontal guide rail, the horizontal trolley and the moving guide rail after being separated;
FIG. 6 is a schematic structural view of the horizontal guide rail, the horizontal trolley and the movable guide rail after being folded;
FIG. 7 is a schematic structural view of the assembly and disassembly table after being folded;
FIG. 8 is a schematic view of the disassembled platform after being unfolded;
FIG. 9 is a schematic view of the quick release and installation and removal of the device for positioning the hook guide and hydraulic elevator;
FIG. 10 is a side elevational view of the quick release and placement hook guide and hydraulic elevator positioning apparatus in a disassembled configuration;
FIG. 11 is a schematic view of the hook guide and hydraulic elevator positioning device being placed in the quick assembly disassembly and placement device and being retracted to a placement position;
fig. 12 is a schematic structural diagram of a hook guide and hydraulic elevator positioning device of a workover rig.
In the figure: 1. horizontal guide rail, 2, horizontal trolley, 2-1, trolley frame, 2-2, roller, 2-3, speed reducer, 2-4, motor, 2-5, fluted disc, 2-6, rack, 2-7, control box, 3, moving guide rail, 3-1, moving guide rail beam, 4, dismounting table, 4-1, support frame, 4-2, inclined strut, 4-3, support, 4-4, bedplate, 4-5, ladder stand rod, 5, hydraulic elevator tray, 6, tray fixing rod, 7, lifting ring fixing device, 8, guide positioning mechanism fixing seat, 9, back beam, 10, connecting plate, 11, connecting plate fixing pin, 12, traveling block hook, 12-1, lifting hook, 13, lifting hook guide and hydraulic elevator positioning device guide rail, 14 and guide positioning mechanism, 15. a lifting ring swing oil cylinder 16, a lifting ring 17, a hydraulic elevator 18 and a derrick supporting leg.
Detailed Description
The invention is further described below with reference to fig. 1-12.
A device for quickly disassembling, assembling and placing a hook guide and hydraulic elevator positioning device comprises a horizontal guide rail 1, a horizontal trolley 2, a movable guide rail 3, a disassembling and assembling table 4, a hydraulic elevator tray 5, a tray fixing rod 6, a lifting ring fixing device 7 and a guide positioning mechanism fixing seat 8, wherein the horizontal guide rail 1 is horizontally fixed on a derrick back beam 9 to provide guide and bearing support for the whole device; the horizontal trolley 2 consists of a trolley frame 2-1, rollers 2-2, a speed reducer 2-3, a motor 2-4, a fluted disc 2-5, a rack 2-6 and a control box 2-7, wherein the trolley frame 2-1 is movably arranged on the horizontal guide rail 1 through the rollers 2-2, the motor 2-4, the speed reducer 2-3 and the fluted disc 2-5 are arranged on the trolley frame 2-1, the motor 2-4 is one of a hydraulic motor, a pneumatic motor or a motor, and can also be driven to move by adopting a device such as an oil cylinder; the control box 2-7 is arranged at a place where the derrick supporting legs 18 are convenient to operate, and controls the horizontal trolley 2 to walk; the horizontal guide rail 1 is provided with racks 2-6, the fluted disc 2-5 is meshed with the racks 2-6, the horizontal trolley 2 is hung on the horizontal guide rail 1 by utilizing the rollers 2-2 and is fixedly connected with the movable guide rail 3, the horizontal trolley 2 is driven by a motor 2-4 and a speed reducer 2-3 and the fluted disc 2-5, and the movable guide rail 3 is driven to move back and forth when the fluted disc 2-5 and the racks 2-6 are meshed on the horizontal guide rail 1; the two sides of the movable guide rail 3 are provided with the dismounting tables 4, the movable guide rail 3 at the upper parts of the two dismounting tables 4 is provided with a guide positioning mechanism fixing seat 8 and a hanging ring fixing device 7, the bottom of the guide positioning mechanism fixing seat 8 is fixed on a movable guide rail cross beam 3-1, one side of the hanging ring fixing device 7 is hinged with the movable guide rail 3 through a hinge, and when the hanging ring fixing device 7 does not need to fix the hanging ring 16, the hanging ring fixing device can be rotatably placed at a position which does not influence the operation in a rotating mode; a hydraulic elevator tray 5 is arranged on a movable guide rail 3 between the lower parts of the two disassembly and assembly tables 4, the horizontal and vertical states of the hydraulic elevator tray 5 are changed through a tray fixing rod 6, and the tray fixing rod 6 erects the hydraulic elevator tray 5 through replacing a hanging position to make up an operation space for wellhead operation; the two disassembling and assembling tables 4, the hydraulic elevator tray 5, the lifting ring fixing device 7 and the guide positioning mechanism fixing seat 8 move together when the horizontal trolley 2 drives the movable guide rail 3 to move.
The disassembly and assembly table 4 consists of a support frame 4-1, an inclined support frame 4-2, a support 4-3, a bedplate 4-4 and ladder stand rods 4-5, wherein the support frame 4-1 is hinged at one end of the bedplate 4-4, the support 4-3 is hinged at the other end of the bedplate 4-4, the ladder stand rods 4-5 are manufactured on the support 4-3, the upper end of the support 4-3 is hinged with the inclined support frame 4-2, and the other end of the inclined support frame 4-2 is spliced with the support frame 4-1; the dismounting table 4 is hung on the movable guide rail 3 and can be folded and rotate around the movable guide rail 3.
After the hook guide and the hydraulic elevator positioning device are disassembled, the hydraulic elevator 17 is placed on a hydraulic elevator tray 5 and is fixed through a tray fixing rod 6, a lifting ring 16 is fixed on a movable guide rail 3 through a lifting ring fixing device 7, a guide positioning mechanism 14 is fixed on the movable guide rail 3 through a guide positioning mechanism fixing seat 8, and a horizontal trolley 2 drives the movable guide rail 3 when moving, the hydraulic elevator tray 5, the lifting ring fixing device 7, the guide positioning mechanism fixing seat 8, the hook guide and the hydraulic elevator positioning device to move together to a placing position or a working position.
The main structure size of the upper part of the movable guide rail 3 and the guide rail 13 of the hook guide and hydraulic elevator positioning device is completely the same, when the horizontal trolley 2 drives the movable guide rail 3 to move to the position connected with the guide rail 13 of the hook guide and hydraulic elevator positioning device, the lower end of the guide rail 13 of the hook guide and hydraulic elevator positioning device is spliced with the upper end of the movable guide rail 3 to form a complete guide rail, and the guide positioning mechanism 14 can move up and down along the complete guide rail.
The big hook guiding and hydraulic elevator positioning device consists of a big hook guiding and hydraulic elevator positioning device guide rail 13, a guiding and positioning mechanism 14, a lifting ring swinging oil cylinder 15, a lifting ring 16 and a hydraulic elevator 17, is a device for stabilizing and swinging the hydraulic elevator, is mainly used for matching with other automatic equipment to carry out tubular column processing operation when a top drive is not used, and is matched equipment of a drilling and repairing machine during the drilling and tripping operation (see attached figure 12).
The working process of the device for quickly disassembling and placing the hook guide and hydraulic elevator positioning device is as follows, and the disassembling process is taken as an example to be described below, and the assembling process is opposite and similar to the disassembling process.
Firstly, unfolding a dismounting table 4 to a proper position, after unfolding and fixing, facilitating operators to climb and stand on the table plate 4-4 through a ladder rod 4-5 on a support 4-3 for operation, after unfolding, respectively putting two operators on the two dismounting tables 4, pulling out a connecting plate fixing pin 11 of a guide positioning mechanism 14 and a traveling block hook 12, turning over a connecting plate 10, and completing the connection and dismounting work of the guide positioning mechanism 14 and the traveling block hook 12; two operators pull out the hanging ring 16 from the hook lifting lug 12-1 of the traveling block hook 12, fix the hanging ring 16 and the movable guide rail 3 by using the hanging ring fixing device 7, complete the connection and removal work of the hanging ring 16 and the traveling block hook 12, and complete the connection and removal work of all the hook guides and the hydraulic elevator positioning device and the traveling block hook 12; then the dismounting table 4 is folded and rotated to a proper position, and the normal operation of other working conditions is not influenced; and operating a control box 2-7 of the horizontal trolley 2, a speed reducer 2-3 and a motor 2-4 to start working, moving the horizontal trolley 2 through a fluted disc 2-5 and a rack 2-6, guiding the moving guide rail 3 and the hook and moving the hook and the hydraulic elevator positioning device to a position which does not interfere with other operations (see the attached drawings 5, 10 and 11), and finishing all the disassembling and placing operations. The installation work can be completed according to the reverse operation of the flow.
The above description is only a preferred embodiment of the present invention, and the above illustration does not limit the essence of the present invention in any form, and any simple modification or variation of the above embodiments based on the technical essence of the present invention and equivalent embodiments which may be changed or modified to equivalent variations by using the technical essence of the present invention by those of ordinary skill in the art after reading the present description still belong to the technical solution of the present invention without departing from the essence and scope of the present invention.
Claims (6)
1. The utility model provides a quick assembly disassembly and place hook direction and hydraulic elevator positioner's device, it comprises horizontal guide rail (1), horizontal dolly (2), moving guide (3), dismouting platform (4), hydraulic elevator tray (5), tray dead lever (6), rings fixing device (7), guiding orientation mechanism fixing base (8), its characterized in that: the horizontal guide rail (1) is horizontally fixed on a derrick back beam (9), the horizontal trolley (2) consists of a trolley frame (2-1), rollers (2-2), a speed reducer (2-3), a motor (2-4), a fluted disc (2-5), a rack (2-6) and a control box (2-7), the trolley frame (2-1) is movably arranged on the horizontal guide rail (1) through the rollers (2-2), the trolley frame (2-1) is provided with the motor (2-4), the speed reducer (2-3) and the fluted disc (2-5), the horizontal guide rail (1) is provided with the rack (2-6), and the fluted disc (2-5) is meshed with the rack (2-6); the control boxes (2-7) are arranged on derrick supporting legs (18); the horizontal trolley (2) is hung on the horizontal guide rail (1) by using a roller (2-2) and is fixedly connected with the movable guide rail (3), the horizontal trolley (2) is driven by a motor (2-4) and a speed reducer (2-3), and the movable guide rail (3) is driven to move back and forth by using a fluted disc (2-5) and a rack (2-6) to be meshed on the horizontal guide rail (1) and is controlled by a control box (2-7); moving guide (3) both sides on install dismouting platform (4), be equipped with guiding orientation mechanism fixing base (8) and rings fixing device (7) on moving guide (3) on two dismouting platform (4) upper portions, the bottom of guiding orientation mechanism fixing base (8) is fixed on moving guide crossbeam (3-1), one side and moving guide (3) of rings fixing device (7) are through hinged joint, be equipped with hydraulic elevator tray (5) and tray dead lever (6) on moving guide (3) between two dismouting platform (4) lower parts.
2. The device for quickly disassembling and assembling and placing the hook guide and hydraulic elevator positioning device according to claim 1, wherein: the two disassembling and assembling tables (4), the hydraulic elevator tray (5), the lifting ring fixing device (7) and the guide positioning mechanism fixing seat (8) move together when the horizontal trolley (2) drives the movable guide rail (3) to move.
3. The device for quickly disassembling and assembling and placing the hook guide and hydraulic elevator positioning device according to claim 1, wherein: after the hook guide and the hydraulic elevator positioning device are disassembled, the hydraulic elevator (17) is placed on a hydraulic elevator tray (5) and is fixed through a tray fixing rod (6), a lifting ring (16) is fixed on a movable guide rail (3) through a lifting ring fixing device (7), a guide positioning mechanism (14) is fixed on the movable guide rail (3) through a guide positioning mechanism fixing seat (8), the movable guide rail (3) is driven when a horizontal trolley (2) moves, the hydraulic elevator tray (5), the lifting ring fixing device (7), the guide positioning mechanism fixing seat (8) and the hook guide and the hydraulic elevator positioning device move together to a placing position or a working position.
4. The device for quickly disassembling and assembling and placing the hook guide and hydraulic elevator positioning device according to claim 1, wherein: the disassembly and assembly table (4) consists of a support frame (4-1), an inclined support frame (4-2), a support (4-3), a bedplate (4-4) and ladder climbing rods (4-5), wherein the support frame (4-1) is hinged to one end of the bedplate (4-4), the support (4-3) is hinged to the other end of the bedplate (4-4), the ladder climbing rods (4-5) are manufactured on the support (4-3), the upper end of the support (4-3) is hinged to the inclined support frame (4-2), and the other end of the inclined support frame (4-2) is spliced with the support frame (4-1); the dismounting table (4) is hung on the movable guide rail (3) and can be folded and rotate around the movable guide rail (3).
5. The device for quickly disassembling and assembling and placing the hook guide and hydraulic elevator positioning device according to claim 1, wherein: the main structure sizes of the upper part of the movable guide rail (3) and the guide rail (13) of the hook guide and hydraulic elevator positioning device are completely the same, when the horizontal trolley (2) drives the movable guide rail (3) to move to the position connected with the guide rail (13) of the hook guide and hydraulic elevator positioning device, the lower end of the guide rail (13) of the hook guide and hydraulic elevator positioning device is spliced with the upper end of the movable guide rail (3) to form a complete guide rail, and the guide positioning mechanism (14) can move up and down along the complete guide rail.
6. The device for quickly disassembling and assembling and placing the hook guide and hydraulic elevator positioning device according to claim 1, wherein: the motor (2-4) is one of a hydraulic motor, a pneumatic motor or an electric motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021402383.2U CN212454308U (en) | 2020-07-16 | 2020-07-16 | Device for quickly disassembling and assembling and placing hook guide and hydraulic elevator positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021402383.2U CN212454308U (en) | 2020-07-16 | 2020-07-16 | Device for quickly disassembling and assembling and placing hook guide and hydraulic elevator positioning device |
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| Publication Number | Publication Date |
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| CN212454308U true CN212454308U (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021402383.2U Active CN212454308U (en) | 2020-07-16 | 2020-07-16 | Device for quickly disassembling and assembling and placing hook guide and hydraulic elevator positioning device |
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| Country | Link |
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| CN (1) | CN212454308U (en) |
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