CN114789964A - Suspension arm system for autonomous installation of fan and large-scale construction equipment - Google Patents

Suspension arm system for autonomous installation of fan and large-scale construction equipment Download PDF

Info

Publication number
CN114789964A
CN114789964A CN202210546842.1A CN202210546842A CN114789964A CN 114789964 A CN114789964 A CN 114789964A CN 202210546842 A CN202210546842 A CN 202210546842A CN 114789964 A CN114789964 A CN 114789964A
Authority
CN
China
Prior art keywords
oil cylinder
bolt
section
suspension arm
arm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210546842.1A
Other languages
Chinese (zh)
Inventor
谭志国
高鹏
杨天冉
姚飞雄
周杰民
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Three Gorges Corp
China Three Gorges Construction Engineering Co Ltd
Original Assignee
China Three Gorges Corp
China Three Gorges Construction Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Three Gorges Corp, China Three Gorges Construction Engineering Co Ltd filed Critical China Three Gorges Corp
Priority to CN202210546842.1A priority Critical patent/CN114789964A/en
Publication of CN114789964A publication Critical patent/CN114789964A/en
Priority to PCT/CN2022/110278 priority patent/WO2023221302A1/en
Pending legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00Other constructional features or details
    • B66C13/16Applications of indicating, registering, or weighing devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62Constructional features or details
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62Constructional features or details
    • B66C23/64Jibs
    • B66C23/70Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/705Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62Constructional features or details
    • B66C23/82Luffing gear
    • B66C23/821Bracing equipment for booms
    • B66C23/823Bracing equipment acting in vertical direction

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

The application provides a davit system that is used for fan and large-scale construction equipment to independently install, including the first davit that can alternate vertical slip, first davit is equipped with a plurality of cover framves along length direction, and the cover frame includes first half cover frame, and first half cover frame inboard is equipped with a plurality of bolt devices, and the bolt device is used for pinning the fan tower section of thick bamboo of fan, has solved the problem that the fan that is located the eminence and large-scale construction equipment tower section of thick bamboo are difficult to the installation.

Description

Suspension arm system for independently installing fan and large construction equipment
Technical Field
The invention relates to the field of large-scale equipment installation, in particular to a suspension arm system for independently installing a fan and large-scale construction equipment.
Background
With the development of wind power projects, wind power generation is more and more common, and the installation of a fan usually requires a crane, and the traditional crane can be referred to as CN 206278849U, a structure recorded in a mobile crawler crane. Because of the high height of the fan, a large crawler crane is usually adopted for hoisting so as to meet the hoisting height, and the hoisting height of a small crane cannot meet the requirement. However, this approach also has a number of disadvantages: the method is characterized in that a large crawler crane with high price needs to be purchased, the requirement on road infrastructure for the large crawler crane is high, foundation treatment needs to be carried out on assembled and hoisted leveling fields of the crawler crane, the crawler crane is troublesome to assemble, disassemble, operate and maintain, and the large crawler crane also needs the assistance and the matching of a small crane for assembling and disassembling. Therefore, a vehicle-mounted hoisting platform which is simpler and more convenient for a larger crawler crane is needed, the vehicle-mounted hoisting platform can be used as a common crane at ordinary times, can independently complete all hoisting work without the assistance of other cranes when a fan tower cylinder is installed, and has a self-climbing function, so that the installation requirements of tower cylinders and equipment at higher positions are met along with the rise of the tower cylinders during installation, and the structure is simplified.
In the prior art, the CN 208948712U is referred to a structure recorded in a self-climbing crane based on a wind turbine tower body, and a climbing device of the structure is complex and low in practicability.
Disclosure of Invention
The invention provides a suspension arm system for independently mounting a fan and large-scale construction equipment, which solves the problem that the fan and a tower cylinder of the large-scale construction equipment which are positioned at a high position are difficult to mount.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a davit system for fan and large-scale construction equipment independently installation, includes the first davit that can alternate vertical slip, and first davit is equipped with a plurality of cover framves along length direction, and the cover frame includes first half cover frame, and first half cover frame inboard is equipped with a plurality of bolt devices, and the bolt device is used for pinning the fan tower section of thick bamboo of fan.
In the preferable scheme, the lifting device further comprises a second lifting arm, the second lifting arm has the same structure as the first lifting arm, the sleeve frame of the second lifting arm comprises a second half sleeve frame, and the first half sleeve frame and the second half sleeve frame are combined to embrace the tower cylinder of the fixed fan.
In a preferred scheme, the first half-sleeved frame comprises a main arm frame and an auxiliary arm frame which can extend in opposite directions, a first bolt device is arranged on the inner side of the first half-sleeved frame, a second bolt device is arranged on the inner side of the main arm frame, and the first bolt device and the second bolt device are used for bolting a fan tower cylinder of a fan.
In an optimized scheme, the first half of the sleeve frame further comprises a web member device, an oil cylinder mounting seat is arranged in the middle of the web member device, telescopic web members are arranged at two ends of the oil cylinder mounting seat, web member oil cylinders are arranged in the telescopic web members, and the end parts of the two telescopic web members are respectively connected with the main arm frame and the auxiliary arm frame.
In a preferred scheme, the auxiliary arm frame is provided with a butt joint telescopic rod, a butt joint oil cylinder is arranged in the butt joint telescopic rod, a butt joint pin hole is formed in the end part of the butt joint telescopic rod, a lock pin oil cylinder is arranged at the end part of the main arm frame or the auxiliary arm frame, a lock pin is arranged at the end part of the lock pin oil cylinder, and the lock pin oil cylinder drives the lock pin to be inserted into the butt joint pin hole.
In the preferred scheme, a limiting baffle is arranged in the main arm frame, an in-place sensor is arranged in the limiting baffle and used for detecting a butt joint telescopic rod of the auxiliary arm frame.
In the preferred scheme, the second bolt device comprises a bolt seat, a tower barrel bolt and a bolt oil cylinder, the structure of the second bolt device is the same as that of the first bolt device, the bolt oil cylinder is responsible for executing telescopic motion, the tower barrel bolt is inserted into the tower barrel, the bolt seat bears stress, the end part of the tower barrel bolt is connected with the bolt oil cylinder, the bolt seat is sleeved with the tower barrel bolt in a sliding mode, a linear sliding mechanism is arranged on the inner side of the main arm frame, and the moving part of the linear sliding mechanism is connected with the bolt oil cylinder.
In a preferred scheme, the first suspension arm comprises a suspension arm base section, the suspension arm base section comprises a base section swing angle section and a base section climbing section, a guide sliding mechanism is arranged on the side wall of the base section climbing section, the guide sliding mechanism comprises a sliding plate seat, a jacking oil cylinder is arranged on one side of the sliding plate seat, two ends of the jacking oil cylinder are respectively connected with the sliding plate seat and the base section climbing section, and a first bolt device is arranged on the sliding plate seat.
In the preferred scheme, the first suspension arm further comprises a telescopic arm, the upper part of a swing angle section of a suspension arm base section is fixedly connected with the telescopic arm, the middle part of the swing angle section of the suspension arm base section is rotatably connected with a climbing section of the base section, a swing angle device is arranged at the rotating joint, a first balance oil cylinder and a second balance oil cylinder are arranged at the lower end of the suspension arm base section, two ends of the first balance oil cylinder and two ends of the second balance oil cylinder are respectively hinged with the swing angle section of the base section and the climbing section of the base section, and a rotatable rotary suspension frame is arranged at the upper end of the telescopic arm.
In the preferred scheme, the lifting device further comprises a lifting trolley, and the lower end of the lifting arm is hinged to the tail end of the lifting trolley.
The invention has the beneficial effects that:
1. the economic efficiency is high to avoid the function surplus.
(1) And (5) a fan mounting mode. Compared with other hoisting construction, the fan installation has the remarkable characteristic that the relation between a hoisting point and a falling object point is simple and fixed. Specifically, the method comprises the following steps: the fan is generally installed by lifting from the ground in front of a tower cylinder and installing a hook on the top of the tower cylinder step by step, namely, a lifting point and a falling object point do not change greatly, only the elevation of the falling object point changes, and the method belongs to a fixed point-to-point lifting mode. The hoisting mode has simple action and low requirement on hoisting equipment, and the crane structure can be simpler.
(2) And other hoisting construction modes. The method belongs to a lifting mode that a lifting point and a falling object point change frequently in the working range of a crane, namely a lifting mode that the lifting point and the falling object point are not fixed, and belongs to a non-fixed point-to-point lifting mode. The hoisting mode has high requirement on the amplitude of the hoisting equipment, so that the crane has a complex structure and is expensive. The crawler crane belongs to the hoisting equipment.
If fixed point-to-point hoisting equipment is used for fixed point-to-point hoisting, the problems of redundant performance and poor economical efficiency of the hoisting equipment exist, and the method belongs to the category of using a crawler crane to install a fan. This patent has designed a neotype fixed point-to-point lifting device based on this thinking to avoided the hoisting equipment function to be rich and remained, improved installation effectiveness and economic nature.
2. The whole installation process does not need the assistance of other hoisting equipment. The mode of installing the fan on the crawler crane needs other hoisting and transporting equipment to be matched for transporting, installing and detaching the components of the crawler crane. This patent passes through vehicle-mounted platform transportation, can also independently carry out the conversion that the on-vehicle hoist and mount mode climbed the hoist and mount mode to the cantilever crane, need not with the help of other hoisting equipment, has realized hoisting equipment's full flow integration, has practiced thrift the cost in a large number, has improved efficiency.
3. And the installation requirement of unlimited height is met. Through a plurality of cover frame and the direction slide mechanism's of climbing round pin axle penetrate tower section of thick bamboo round pin shaft hole and jacking self in turn, realize that this patent lifting device's whole marching type climbs, along with the installation of fan tower, promote this patent lifting device's height to adapt to different mounting height, have showing the advantage to the tower section of thick bamboo or the equipment of installation eminence.
4. And the maintenance is convenient. The second suspension arm and the first suspension arm are used for climbing in a combined manner and are matched with lifting and hoisting, so that the structure of hoisting equipment is simplified, the hoisting difficulty is reduced, and the problem that the single suspension arm is difficult to repair when damaged at high altitude is solved; the sleeve frame adopts a mode that two half sleeve frames with the same structure are matched, so that the standardized production of the suspension arm is facilitated.
5. The device is suitable for installation of tower drum equipment of different types. This patent is equipped with the telescopic web member device, is equipped with the butt joint telescopic link in the auxiliary boom frame, and second bolt device is slidable, and the three cooperation is used, and the adaptable tower section of thick bamboo of different diameters when embracing, the self-climbing formula installation of tower section of thick bamboo class equipment such as specially adapted toper fan tower or tower tape unit.
6. The use is simple. The two modes of vehicle-mounted hoisting and climbing hoisting are quickly and conveniently converted, the requirements on roads and field sites are low, the cost and the construction period are saved, and the method has good economic benefits and social benefits.
7. And (4) universality. This patent except can using in the installation fan tower section of thick bamboo, all can use in the installation and the maintenance of other similar tower forms thing, and the commonality is very strong, and popularization meaning and market prospect are good.
Drawings
The invention is further illustrated by the following examples in conjunction with the drawings.
Fig. 1 is a schematic view of the boom of the present invention.
Fig. 2 is a schematic diagram of the present invention.
Fig. 3 is a schematic view of the telescopic arm of the present invention after swinging.
Fig. 4 is a schematic view of the rotation of the swing hanger of the present invention.
Fig. 5 is a schematic view of the cartridge of the present invention.
Fig. 6 is a combination schematic of the half-set frame of the present invention.
Fig. 7 is a schematic view of the interior of the holster according to the present invention.
Fig. 8 is a block diagram of the main arm frame of the present invention.
Fig. 9 is an enlarged view of the invention at the butt pin hole.
FIG. 10 is a simplified schematic of a blower of the present invention.
Fig. 11 is a schematic view of the connection at the pivot angle device of the present invention.
FIG. 12 is a first tower lift of the present invention.
FIG. 13 is a second schematic illustration of tower hoisting according to the present invention.
FIG. 14 is a third schematic illustration of tower hoisting according to the present invention.
FIG. 15 is a fourth schematic illustration of a tower lift of the present invention.
FIG. 16 is a schematic illustration of a tower lift of the present invention.
FIG. 17 is a sixth schematic view of a tower hoist of the present invention.
Fig. 18 is a schematic view of the web cavity of the present invention.
Fig. 19 is a schematic view of the guide slide mechanism of the present invention.
Fig. 20 is a schematic view of the single boom frame of the present invention connected to the base pitch angle segment.
In the figure: a first half frame 1; a mount 101; a web member arrangement 102; a cylinder mount 1021; a main boom 103; an auxiliary boom 104; a first latch means 105; a second latch mechanism 106; a web member cylinder 107; a telescopic web member 108; a first displacement sensor 109; a docking cylinder 110; butting the telescopic rods 111; a docking pin aperture 112; a limit baffle 113; a position sensor 114; a guide opening 115; a lock pin cylinder 116; a linear slide mechanism 117; adjusting the telescopic oil cylinder 118; a second displacement sensor 119; a latch seat 120; a tower cylinder plug 121; a latch cylinder 122; a second half-set frame 2; a boom base section 3; a basic joint swing angle section 301, a basic joint climbing section 302 and a web member cavity 303; a guide slide mechanism 4; a slide plate base 401; a latch cylinder 402; a latch 403; a jacking cylinder 5; a first stock 6; a second set of brackets 7; a telescopic arm 8; a swing angle device 801; a first balancing cylinder 802; a second balancing cylinder 803; a rotary hanger 9; a turning device 901; a hoist 10; a hydraulic system 11; a sling cart 12; a fan 13; a wind turbine tower 1301; a climbing hydraulic station 14; a lift cord sleeve 15; a boom 16; a hook 17.
Detailed Description
Example 1:
as shown in fig. 1 to 19, a boom system for autonomous installation of a fan and large construction equipment comprises a first boom capable of alternatively sliding vertically, wherein the first boom is provided with a plurality of sleeve frames along the length direction, each sleeve frame comprises a first half sleeve frame 1, and a plurality of bolt devices are arranged on the inner side of the first half sleeve frame 1 and used for pinning a fan tower 1301 of the fan 13.
In the preferred scheme, the device further comprises a second suspension arm, the second suspension arm has the same structure as the first suspension arm, the sleeve frame of the second suspension arm comprises a second half sleeve frame 2, and the first half sleeve frame 1 and the second half sleeve frame 2 embrace to fix the fan tower 1301.
In a preferred scheme, the first half-set frame 1 comprises a main arm frame 103 and an auxiliary arm frame 104 which can extend and retract oppositely, a first bolt device 105 is arranged on the inner side of the first half-set frame 1, a second bolt device 106 is arranged on the inner side of the main arm frame 103, and the first bolt device 105 and the second bolt device 106 are used for locking a fan tower 1301 of a fan 13.
In a preferred scheme, the first half-sleeved frame 1 further comprises a web member device 102, an oil cylinder mounting seat 1021 is arranged in the middle of the web member device 102, telescopic web members 108 are arranged at two ends of the oil cylinder mounting seat 1021, a web member oil cylinder 107 is arranged in each telescopic web member 108, and the end parts of the two telescopic web members 108 are respectively connected with the main arm support 103 and the auxiliary arm support 104.
In a preferred scheme, the auxiliary boom 104 is provided with a butt joint telescopic rod 111, a butt joint oil cylinder 110 is arranged in the butt joint telescopic rod 111, the end part of the butt joint telescopic rod 111 is provided with a butt joint pin hole 112, the end part of the main boom 103 or the auxiliary boom 104 is provided with a lock pin oil cylinder 116, the end part of the lock pin oil cylinder 116 is provided with a lock pin, and the lock pin oil cylinder 116 drives the lock pin to be inserted into the butt joint pin hole 112.
In a preferable scheme, a limit baffle 113 is arranged in the main arm frame 103, an in-place sensor 114 is arranged in the limit baffle 113, and the in-place sensor 114 is used for detecting the butt joint telescopic rod 111 of the auxiliary arm frame 104.
In a preferable scheme, the second bolt device 106 comprises a bolt seat 120, a tower bolt 121 and a bolt oil cylinder 122, the end of the tower bolt 121 is connected with the bolt oil cylinder 122, the bolt seat 120 is slidably sleeved with the tower bolt 121, a linear sliding mechanism 117 and an adjusting telescopic oil cylinder 118 are arranged on the inner side of the main arm frame 103, the moving part of the linear sliding mechanism 117 is connected with the bolt oil cylinder 122, one end of the adjusting telescopic oil cylinder 118 is fixed, the other end of the adjusting telescopic oil cylinder is connected with the moving part of the linear sliding mechanism 117, a second displacement sensor 119 is arranged on one side of the adjusting telescopic oil cylinder 118, and the end of the second displacement sensor 119 is connected with the moving part of the linear sliding mechanism 117.
In a preferred scheme, the first suspension arm comprises a suspension arm base section 3, the suspension arm base section 3 comprises a base section swing angle section 301 and a base section climbing section 302, a guide sliding mechanism 4 is arranged on the side wall of the base section climbing section 302, the guide sliding mechanism 4 comprises a sliding plate seat 401, a jacking cylinder 5 is arranged on one side of the sliding plate seat 401, two ends of the jacking cylinder 5 are respectively connected with the sliding plate seat 401 and the base section climbing section 302, a first bolt device 105 is arranged on the sliding plate seat 401, and the structure of the first bolt device 105 is the same as that of the second bolt device 106.
A web cavity 303 is arranged on the base section climbing section 302, and the web device 102 is arranged in the web cavity 303.
In a preferable scheme, the first suspension arm and the second suspension arm can be used in combination or independently, as shown in fig. 20, when the suspension arms are used independently, the main arm supports 103 are installed on both sides of the first set of frames 6 and the second set of frames 7 through the installation bases 101, and when the first set of frames 6 climb, tower bolts 121 of the main arm supports 103 on both sides of the second set of frames 7 are connected with the fan tower 1301 to provide counter force for climbing of the first set of frames 6; when the second sleeve frame 7 climbs, the tower bolt 121 of the first sleeve frame 6 is connected with the fan tower 1301; when the main arm frame 103 of the first and second hangers 6 and 7 is lifted and installed, the tower bolts 121 are connected to the wind turbine tower 1301.
In the preferred scheme, the first suspension arm further comprises a telescopic arm 8, the upper part of a suspension arm basic joint swing angle section 301 is fixedly connected with the telescopic arm 8, the middle part of the suspension arm basic joint swing angle section 301 is rotatably connected with a basic joint climbing section 302, a swing angle device 801 is arranged at the rotary connection position, a first balance oil cylinder 802 and a second balance oil cylinder 803 are arranged at the lower end of the suspension arm basic joint 3, two ends of the first balance oil cylinder 802 and the second balance oil cylinder 803 are respectively hinged with the basic joint swing angle section 301 and the basic joint climbing section 302, a rotatable rotary hanger 9 is arranged at the upper end of the telescopic arm 8, the rotary hanger 9 is driven by a rotary device 901 to rotate around the telescopic arm 8, and a lifting rope hinge sleeve 15 is arranged on the outermost telescopic arm 8.
The back of the basic swing angle section 301 of the suspension arm is provided with a winch 10 and a hydraulic system 11, the ground is also provided with a climbing hydraulic station 14, and the upper end of the telescopic arm 8 is provided with a rotatable rotary hanger 9.
In the preferred scheme, still include sling 12, the davit lower extreme is articulated with sling 12 tail end, and the control mode is: the remote control system comprises a local control mode of a vehicle-mounted platform control room and a remote control mode of controlling indoor video by adopting a wireless portable console or remotely controlling the indoor video on site.
Example 2:
as in fig. 1-19:
firstly, a vehicle-mounted hoisting mode.
This approach appears similar to a truck-mounted structure with substantial significant differences. In order to adapt to two different hoisting modes, a winch 10, a hydraulic system 11, a rotary hanger 9, a rotary device 901, a telescopic boom 8, a boom base section 3 and the like required by hoisting are optimized and integrated on the device.
In order to meet various hoisting requirements with the simplest structure, the connection mode of the telescopic boom 8 at the tail end of the boom and the rotary hanger 9 is designed into a hanger rotatable mode, and the rotary mechanism preferably adopts a mode of combining a rotary bearing, a gear ring and a planetary motor or other feasible modes. In order to solve the problem, on one hand, the rotation of the rotary hanger is designed to be in a one-way 180-degree and left-right 360-degree rotation mode, so that the interference of the steel wire rope is avoided while the full-circle rotation is ensured; on the other hand, we provide a suitable angled lift cord hinge sleeve 15 on the outermost telescopic arm section 8 to provide a suitable break angle for the lift cord at the hinge sleeve. Through the two special designs, the winding and interference of the hoisting steel wire rope on the arm support caused by multi-turn rotation can be avoided. Lifting rope hinge sleeve 15 adds the structure of ball pivot for the sleeve pipe, and the sleeve pipe is by outside steel pipe with soft material structures such as inside lining nylon, and during the lifting rope passed the sleeve pipe, the nylon inside lining can prevent damage lifting rope, and the sleeve pipe adopts ball pivot seat connected mode with outermost flexible arm 8 festival to lifting rope hinge sleeve 15 rotates to all directions along with the lifting rope.
The working process of the vehicle-mounted hoisting mode is that the vehicle-mounted platform is stopped to a proper position according to hoisting requirements, a vehicle-mounted hydraulic station on the vehicle-mounted platform drives the rotary platform to rotate, the boom swing angle oil cylinder is driven to rotate around the hinge point of the tail support and extend out of the tail of the vehicle-mounted platform for a proper distance, and meanwhile, the rotary hanger is driven to rotate to a proper angle by the hanger rotating device so as to hoist objects.
Second, boom climbing and hoisting mode
1. And aligning the vehicle-mounted platform. The hoisting transport vehicle 12 is accurately backed up to be close to the installed base section of the fan tower drum 1301, the climbing hydraulic station 14 is hoisted to the ground close to the base section of the fan tower drum 1301 by the hoisting arm 16 under the working condition of a vehicle-mounted mode, the hydraulic pipeline and the control and electric circuits of the climbing hydraulic station 14 and the hoisting arm 16 are well connected, and along with the overall climbing of the hoisting arm 16, the hydraulic pipeline and the control and electric circuits can be orderly discharged out through the discharging mechanism in the hydraulic system 11 box body attached to the hoisting arm base section 3.
2. And climbing the oil cylinder into the hole. Then the boom 16 is vertically erected, and the position of the sliding plate base 401 on the guiding sliding mechanism 4 arranged on the boom base section 3 is adjusted so that the pin 403 is aligned with the pin hole on the wind turbine tower base section, and the extended pin 403 extends into the pin hole of the wind turbine tower 1301 base section, wherein the pin hole preferably takes the form of an oval hole with redundancy of position deviation so as to align with the inlet hole.
3. The climbing sleeve frame is assembled by itself.
(1) And (4) arranging a sleeve frame. The telescopic hanging arm comprises a first hanging arm, wherein a plurality of sleeve frames which can stretch out and draw back towards two sides are arranged on the first hanging arm along the length direction, the number of the sleeve frames is at least two, the first sleeve frame 6 and the second sleeve frame 7 are arranged on the side face of the first hanging arm, the sleeve frames comprise first half sleeve frames 1, the inner sides of the first half sleeve frames 1 are provided with bolt devices, and the bolt devices are used for pinning a fan tower barrel 1301 of a fan 13. The auxiliary arm support 104 of the first half-set frame 1 and the main arm support 103 of the second half-set frame 2 are in sleeve fit, the main wall and the auxiliary wall are complementarily connected to form a closed-loop structure similar to a rectangle, and the fan tower drum 1301 is tightly held in the middle of the closed-loop structure.
In a preferred scheme, a first displacement sensor 109 is arranged on one side of the telescopic web member 108 and used for detecting the telescopic length of the web member cylinder 107 and matching with an electro-hydraulic proportional valve in a hydraulic system to accurately control the stop of the web member cylinder 107 when the web member cylinder 107 extends to a set position. Because the tower is conical, when the diameter of the cross section changes, the telescopic web member 108 can adjust the distance between the main arm support 103 and the auxiliary arm support 104 to adapt to the change.
In the preferred scheme, the device further comprises a second suspension arm, the second suspension arm has the same structure as the first suspension arm, the sleeve frame of the second suspension arm comprises a second half sleeve frame 2, and the first half sleeve frame 1 and the second half sleeve frame 2 embrace to fix the fan tower 1301. The second half sleeve frame 2 has the same structure as the first half sleeve frame 1, but has an angle difference of 180 degrees and is arranged on a second suspension arm, and the second half sleeve frame 2 can be in sleeve fit with the first half sleeve frame 1 to enable the tightly-held fan tower barrel 1301 to be more stable; the second boom can be used in conjunction with the first boom to hoist the wind turbine tower 1301 without the need for a ground crane. Preferably, two hoisting systems of the boom 16 are symmetrically installed at the same height at the initial installation section of the fan tower 1301, the sleeved-frame arm levers at the same height at the same side need to be arranged in a mode of one side of the main arm frame 103 and one side of the auxiliary arm frame 104, so that the sleeved-frame arm levers can be automatically butted and penetrated by pins to form effective connection, and self-butting installation is realized by driving of the climbing hydraulic station 14 and the hydraulic system 11.
(2) And (4) automatic butt joint of the sleeve frame.
The auxiliary arm support 104 is provided with a butt joint telescopic rod 111, a butt joint oil cylinder 110 is arranged in the butt joint telescopic rod 111, a butt joint pin hole 112 is formed in the end portion of the butt joint telescopic rod 111, and a guide opening 115 is formed in the end portion of the main arm support 103, so that the butt joint telescopic rod 111 can be conveniently inserted in a guiding mode. A limit baffle 113 is arranged in the main arm support 103, an in-place sensor 114 is arranged in the limit baffle 113, the in-place sensor 114 can select a proximity switch, and when the auxiliary arm support 104 abuts against the limit baffle 113, the in-place sensor 114 is triggered by an in-place signal. The outer side of the end part of the main arm support 103 is provided with a lock pin oil cylinder 116, the lock pin oil cylinder 116 is powered by a hydraulic system, the end part of the lock pin oil cylinder 116 is provided with a lock pin, and after receiving a position signal of the position sensor 114, the lock pin oil cylinder 116 drives the lock pin to be inserted into the butt joint pin hole 112 to connect the main arm support 103 and the auxiliary arm support 104. After the boom 16 climbing sleeve frame is connected, the two sets of boom 16 hoisting systems are connected into a whole, the connecting pins of the two booms 16 and the vehicle-mounted platform are unfastened, the two boom 16 hoisting systems realize the conversion from the vehicle-mounted mode to the boom climbing hoisting mode, and the subsequent hoisting of the fan tower section can be started.
4. And hoisting in a climbing mode.
The method comprises the following steps of transporting a subsequent fan tower section to be installed to the range of the hoisting amplitude of the suspension arms 16, controlling a hoisting system consisting of the two suspension arms 16 to drive the swing angle device 801 to swing, wherein the swing angle device 801 can be controlled singly or can be controlled by a control program to carry out double-suspension-arm 16 linkage control, unloading and turning over the tower section to be installed, lifting by lifting a hook, hoisting and hoisting, and in the process, the suspension arm 16 hoisting system carries out the actions of swing angle swing amplitude and stretching of the suspension arm, rotary amplitude of the suspension arm and the like so as to ensure that the tower section to be installed is accurately positioned.
5. And (5) jacking the tower section.
In a preferable scheme, the first bolt device 105 and the second bolt device 106 are similar in structure, the second bolt device 106 comprises a bolt base 120, a tower bolt 121 and a bolt oil cylinder 122, the end of the tower bolt 121 is fixedly sleeved with the bolt base 120, a linear sliding mechanism 117 and an adjusting telescopic oil cylinder 118 are arranged on the inner side of the main arm frame 103, the moving part of the linear sliding mechanism 117 is connected with the bolt oil cylinder 122, and the linear sliding mechanism 117 can be in a sliding groove form, a guide rail sliding block form, a guide rod sliding base form and the like. The main arm support 103 pushes the second pin device 106 to slide left and right along the main arm support 103 by adjusting the telescopic oil cylinder 118 so as to align with the pin hole on the fan tower drum 1301, and after aligning, the pin base 120 is pushed to penetrate through the pin hole on the fan tower drum 1301 for connection by driving the pin oil cylinder 122.
In a preferred scheme, an adjusting telescopic cylinder 118 is further provided, one end of the adjusting telescopic cylinder 118 is fixed, the other end of the adjusting telescopic cylinder 118 is connected with a moving part of the linear sliding mechanism 117, a second displacement sensor 119 is arranged on one side of the adjusting telescopic cylinder 118, the end part of the second displacement sensor 119 is connected with the moving part of the linear sliding mechanism 117, for example, the linear sliding mechanism 117 is a guide rail slider mechanism, and a sliding table of the guide rail slider mechanism is the moving part.
The first and second displacement sensors 109 and 119 may be of a pull type, a linear displacement type, a laser type, or the like.
In a preferred scheme, the first suspension arm comprises a suspension arm base section 3, a guide sliding mechanism 4 is arranged on the side wall of a base section climbing section 302 of the suspension arm base section 3, the guide sliding mechanism 4 can be in the form of a sliding groove belt roller or a guide rail sliding block, and the like, taking the form of a sliding groove belt roller as an example, a plurality of sliding plates with rollers are arranged on the same guide rail, one side of each sliding plate is provided with a jacking oil cylinder 5, the jacking oil cylinder 5 preferably adopts a multi-section telescopic oil cylinder, the stroke range of the sliding plate seat 401 is increased, a better applicability is provided, two ends of the jacking oil cylinder 5 are respectively connected with the sliding part of the guide sliding mechanism 4 and the lifting section 302 of the basic section of the suspension arm, the jacking or retraction of the jacking oil cylinder 5 is used as the lifting power of the sliding part of the guide sliding mechanism 4, the first suspension arm 16 carries the hydraulic system 11 and is used as the power source of each hydraulic actuating mechanism, and when the power or hydraulic oil is insufficient, the lifting hydraulic station 14 arranged on the ground can provide power or hydraulic oil.
In the preferred scheme, two sets of booms 16 are used for climbing in a synchronous control and integral mode. Before climbing, the two sets of the suspension arms 16 are in an empty hook state, the arm supports are adjusted to be vertical, and the telescopic arms 8 are retracted into the suspension arm base sections 3. The climbing process is as follows:
(1) working state and climbing initial state: the first set of frame 6, the second set of frame 7 and the pin base 120 of each guiding sliding mechanism 4 are inserted into the pin hole of the fan tower cylinder 1301, so that the stability of the whole hoisting system consisting of two sets of hoisting arms 16 in the working state is ensured.
(2) The first step is as follows: under the state that the first set of frame 6, the second set of frame 7 and the guide sliding mechanisms 4 are fixed on the fan tower 1301 together, the guide sliding mechanisms 4 arranged in the base section climbing section 302 are released from pin penetrating and locking with pin shaft holes of the fan tower 1301, and the whole set of frame consisting of the first set of frame 6 and the second set of frame 7 bears the weight of the two sets of hoisting systems of the hoisting arms 16.
(3) The second step is that: then, the plurality of guide sliding mechanisms 4 arranged in the base section climbing section 302 slide upwards by a climbing stroke distance under the driving of the jacking cylinder 5. After aligning the pin hole of the previous segment of the fan tower 1301, the bolt 403 attached to the guiding sliding mechanism 4 penetrates into the previous pin hole of the fan tower 1301 again to be locked, and after the positioning, the weight of the two sets of suspension arm 16 hoisting systems is connected.
(4) The third step: then, the first set of frame 6 and the second set of frame 7 are unlocked, the lifting cylinder 5 lifts the whole lifting system of the suspension arm 16 upwards for a certain distance, then the wind turbine tower drum 1301 is locked tightly, the bolt seat 120 extends into the pin hole of the wind turbine tower drum 1301, the first set of frame 6, the second set of frame 7 and each guide sliding mechanism 4 bear the weight of the lifting system of the suspension arm 16 again, and the whole climbing cycle is completed. The first boom climbs upwards in a circulating reciprocating mode.
6. Hoisting and amplitude variation.
In a preferred scheme, the first suspension arm further comprises a telescopic arm 8, the upper end part of the suspension arm base section 3 is fixedly connected with the telescopic arm 8, and the telescopic arm 8 is multi-section and telescopic. The middle part of the suspension arm base section 3 is provided with a swing angle device 801, the swing angle device 801 preferably adopts a motor and a speed reduction limiter as driving devices, the speed reduction limiter does not have the function of a speed reducer, the limiting device also has the function of swing angle limiting, the suspension arm 16 is ensured to rotate within a limited proper angle, and a gear ring is sleeved and meshed with a gear to be used as a meshing force transmission device. The suspension arm basic joint 3 is divided into a front piece and a rear piece, the rear piece is a basic joint swing angle section 301, the front piece is a basic joint climbing section 302, the middle part of the basic joint climbing section 302 is provided with a driving device of a swing angle device 801, and the rear piece basic joint swing angle section 301 is provided with a meshing force transmission device of the swing angle device 801.
The lower end of the telescopic boom 8 is provided with a first balance oil cylinder 802 and a second balance oil cylinder 803, two ends of the first balance oil cylinder 802 and the second balance oil cylinder 803 are respectively hinged with the basic pitch swing angle section 301 and the basic pitch climbing section 302, and are matched with the swing angle device 801 to be driven together, so that the basic pitch swing angle section 301 swings towards two sides relative to the basic pitch climbing section 302, and the swing angle section 301 of the basic pitch swings and drives the telescopic boom 8 and other devices to swing, thereby realizing the amplitude variation of the boom 16. The swing angle device 801 provides main variable amplitude power in the variable amplitude process, and the torque required by variable amplitude is large, so that the reliability requirement is high, the first balance oil cylinder 802 and the second balance oil cylinder 803 are additionally arranged to provide auxiliary variable amplitude power, and the stability of the variable amplitude process is ensured.
The upper end of the telescopic arm 8 is provided with a rotatable rotary hanger 9, the rotary hanger 9 is provided with a rotary device 901, the rotary device 901 can use a large gear ring and a planetary pinion to be meshed and the like, the large gear ring is fixed with the telescopic arm 8 or the rotary hanger 9, the shaft end of the motor is connected with the planetary pinion, and the large gear ring is driven by the planetary pinion to rotate so as to drive the rotary hanger 9 to rotate.
The suspension arm 16 is also provided with a winch 10 and a hydraulic system 11, wherein the winch 10 is used for winding and unwinding a lifting rope of a lifting hook 17 to drive the lifting hook at the front end of the rotary hanger 9 and the lifting of a suspended object to ascend and descend. The hydraulic system 11 is used for providing hydraulic power for each hydraulic element of the suspension arm 16, the hydraulic system 11 is small in size and limited in hydraulic oil storage, when the power and the hydraulic oil are insufficient, the climbing hydraulic station 14 arranged on the ground provides supplementary power and hydraulic oil, the hydraulic system 11 is connected with the climbing hydraulic station 14 through an oil pipe and a control cable, and a winding and unwinding device for the oil pipe and the control cable is arranged in the hydraulic system 11.
III, Others
1. And (4) fault processing. When climbing to a high place, if one suspension arm has a fault, the other suspension arm can assist in disassembling the suspension arm or debugging the fault.
2. In the preferred scheme, the lifting system further comprises a lifting transport vehicle 12, the lower end of the suspension arm 16 is hinged to the tail end of the lifting transport vehicle 12, and the lifting transport vehicle and the suspension arm can be separated and restored, so that the lifting system can be used as a ground crane and can climb to the air to work. The control mode is as follows: the remote control system comprises a local control mode of a vehicle-mounted platform control room and a remote control mode of controlling indoor video by adopting a wireless portable console or remotely controlling the indoor video on site.
3. And (4) independently using the suspension arm. The first suspension arm and the second suspension arm can be used in combination or independently, if the suspension arms are used independently, the main arm support 103 is used by both the first set of support 6 and the second set of support 7 at the moment, so as to ensure the stability of the suspension arm 16 in the processes of hoisting and climbing.
If no special description is given to the inner side of the device, the condition that the hydraulic oil cylinder needs to stop to a specific position can be controlled by adopting electro-hydraulic proportion.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and includes equivalents of technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of this invention.

Claims (10)

1. The utility model provides a davit system that is used for fan and large-scale construction equipment independently to install which characterized by: the wind power generation suspension arm comprises a first suspension arm capable of alternately and vertically sliding, wherein a plurality of sleeve frames are arranged on the first suspension arm along the length direction, each sleeve frame comprises a first half sleeve frame (1), a plurality of bolt devices are arranged on the inner side of each first half sleeve frame (1), and each bolt device is used for pinning a fan tower drum (1301) of a fan (13).
2. The boom system for autonomous wind turbine installation of claim 1, further comprising: the structure of the second suspension arm is the same as that of the first suspension arm, the sleeve frame of the second suspension arm comprises a second half sleeve frame (2), and the first half sleeve frame (1) and the second half sleeve frame (2) are encircled to fix the fan tower barrel (1301).
3. The boom system for autonomous wind turbine installation of claim 1, wherein: the first half-sleeved frame (1) comprises a main arm support (103) and an auxiliary arm support (104) which can extend in an opposite direction, a first bolt device (105) is arranged on the inner side of the first half-sleeved frame (1), a second bolt device (106) is arranged on the inner side of the main arm support (103), and the first bolt device (105) and the second bolt device (106) are used for pinning a fan tower drum (1301) of a fan (13).
4. The boom system for autonomous wind turbine installation of claim 1, further comprising: the first half of the jacket frame (1) further comprises a web member device (102), an oil cylinder mounting seat (1021) is arranged in the middle of the web member device (102), telescopic web members (108) are arranged at two ends of the oil cylinder mounting seat (1021), a web member oil cylinder (107) is arranged in each telescopic web member (108), and the end parts of the two telescopic web members (108) are respectively connected with the main arm support (103) and the auxiliary arm support (104).
5. The boom system for autonomous wind turbine installation of claim 1, wherein: the auxiliary boom (104) is provided with a butt joint telescopic rod (111), a butt joint oil cylinder (110) is arranged in the butt joint telescopic rod (111), a butt joint pin hole (112) is formed in the end portion of the butt joint telescopic rod (111), a lock pin oil cylinder (116) is arranged at the end portion of the main boom (103) or the auxiliary boom (104), a lock pin is arranged at the end portion of the lock pin oil cylinder (116), and the lock pin oil cylinder (116) drives the lock pin to be inserted into the butt joint pin hole (112).
6. The boom system for autonomous wind turbine installation of claim 5, wherein: a limit baffle (113) is arranged in the main arm support (103), an in-place sensor (114) is arranged in the limit baffle (113), and the in-place sensor (114) is used for detecting a butt joint telescopic rod (111) of the auxiliary arm support (104).
7. The boom system for autonomous wind turbine installation of claim 4, wherein: the second bolt device (106) comprises a bolt seat (120), a tower barrel bolt (121) and a bolt oil cylinder (122), the end part of the tower barrel bolt (121) is connected with the bolt oil cylinder (122), the bolt seat (120) is sleeved with the tower barrel bolt (121) in a sliding mode, a linear sliding mechanism (117) is arranged on the inner side of the main arm support (103), and a moving part of the linear sliding mechanism (117) is connected with the bolt oil cylinder (122).
8. The boom system for autonomous wind turbine installation of claim 1, further comprising: first davit includes basic festival (3) of davit, basic festival (3) of davit includes that basic festival pendulum angle section (301) and basic festival climb section (302), basic festival climb section (302) lateral wall is equipped with direction slide mechanism (4), direction slide mechanism (4) include slide plate seat (401), slide plate seat (401) one side is equipped with jacking cylinder (5), sliding plate seat (401) and basic festival climb section (302) are connected respectively to jacking cylinder (5) both ends, first bolt device (105) are established on slide plate seat (401).
9. The boom system for autonomous wind turbine installation of claim 8, wherein: the first suspension arm further comprises a telescopic arm (8), the upper portion of a suspension arm basic section swing angle section (301) is fixedly connected with the telescopic arm (8), the middle portion of the suspension arm basic section swing angle section (301) is rotatably connected with a basic section climbing section (302), a swing angle device (801) is arranged at the rotating connection position, a first balance oil cylinder (802) and a second balance oil cylinder (803) are arranged at the lower end of a suspension arm basic section (3), two ends of the first balance oil cylinder (802) and the second balance oil cylinder (803) are hinged with the basic section swing angle section (301) and the basic section climbing section (302) respectively, and a rotatable rotary hanger (9) is arranged at the upper end of the telescopic arm (8).
10. The boom system for autonomous wind turbine installation of claim 9, further comprising: the lifting device further comprises a sling cart (12), and the lower end of the suspension arm is hinged with the tail end of the sling cart (12).
CN202210546842.1A 2022-05-20 2022-05-20 Suspension arm system for autonomous installation of fan and large-scale construction equipment Pending CN114789964A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202210546842.1A CN114789964A (en) 2022-05-20 2022-05-20 Suspension arm system for autonomous installation of fan and large-scale construction equipment
PCT/CN2022/110278 WO2023221302A1 (en) 2022-05-20 2022-08-04 Boom system for independently mounting wind turbine and large-scale construction apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210546842.1A CN114789964A (en) 2022-05-20 2022-05-20 Suspension arm system for autonomous installation of fan and large-scale construction equipment

Publications (1)

Publication Number Publication Date
CN114789964A true CN114789964A (en) 2022-07-26

Family

ID=82463324

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210546842.1A Pending CN114789964A (en) 2022-05-20 2022-05-20 Suspension arm system for autonomous installation of fan and large-scale construction equipment

Country Status (2)

Country Link
CN (1) CN114789964A (en)
WO (1) WO2023221302A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023221302A1 (en) * 2022-05-20 2023-11-23 中国长江三峡集团有限公司 Boom system for independently mounting wind turbine and large-scale construction apparatus
CN117775960A (en) * 2024-02-28 2024-03-29 临沂大学 Flue gas desulfurization tower installation lifting device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4684355B2 (en) * 2010-04-30 2011-05-18 三井造船株式会社 Telescopic mechanism of telescopic boom of construction crane
CN105836636A (en) * 2015-01-15 2016-08-10 三汽车起重机械有限公司 Hold hoop of climbing crane and climbing crane
EP3828121B1 (en) * 2019-11-26 2024-02-28 General Electric Renovables España S.L. Crane and method for erecting a tower
CN114180472A (en) * 2021-12-08 2022-03-15 湖南科技大学 Large-displacement telescopic self-climbing wind power hoisting device and method
CN114789964A (en) * 2022-05-20 2022-07-26 中国长江三峡集团有限公司 Suspension arm system for autonomous installation of fan and large-scale construction equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023221302A1 (en) * 2022-05-20 2023-11-23 中国长江三峡集团有限公司 Boom system for independently mounting wind turbine and large-scale construction apparatus
CN117775960A (en) * 2024-02-28 2024-03-29 临沂大学 Flue gas desulfurization tower installation lifting device
CN117775960B (en) * 2024-02-28 2024-05-03 临沂大学 Flue gas desulfurization tower installation lifting device

Also Published As

Publication number Publication date
WO2023221302A1 (en) 2023-11-23

Similar Documents

Publication Publication Date Title
CN114789964A (en) Suspension arm system for autonomous installation of fan and large-scale construction equipment
CN102747841B (en) Curtain wall assembly, turnover and hoisting equipment and construction method thereof
US10808677B2 (en) Fluid driven vertical axis turbine
JP2000283018A (en) Horizontal shaft windmill and construction method thereof
CN108821133A (en) Self-crawling type crane based on Wind turbines tower ontology
CN202415019U (en) Rapidly erected tire type crane
CN110606438A (en) Detachable rotary crane
CN103010966A (en) Multi-functional material conveying, distributing and hoisting equipment
CN108560510B (en) Movable overhaul platform for surface runner of hydropower station
CN206185355U (en) High altitude (HA) scope is with welding auxiliary machinery arm
CN203159077U (en) Multifunctional material delivering, distributing and hoisting apparatus
CN208948712U (en) Self-crawling type crane based on Wind turbines tower ontology
CN106223622A (en) A kind of tower concrete spreader
CN113235460B (en) Prefabricated segment swinging method for bridge cantilever assembly
CN114105000A (en) Hoisting assembly and tower crane
CN211198404U (en) Detachable rotary crane
RU2362868C1 (en) Installation for drilling, testing and repair of oil and gas wells upa-80
CN201619965U (en) Climbing lift
CN220283436U (en) Hoisting mechanism, wind power device thereof and full-automatic tower crane
CN219116989U (en) Rail sliding device for hoisting high-rise building surface
CN212050266U (en) Self-climbing crane for fan
CN216331669U (en) Special vehicle large tractor for maintaining crane pull rod
CN211226049U (en) Position-changeable crane trolley
CN220245358U (en) Hoisting and transferring device for steel structure building
CN221116763U (en) Foldable truss gantry crane

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination