CN218058093U

CN218058093U - Self-tensioning lifting appliance for lower chord cable

Info

Publication number: CN218058093U
Application number: CN202220899432.0U
Authority: CN
Inventors: 丁建国; 马伟; 徐干平; 柴红杰; 吴艽莲; 陈婷秀
Original assignee: Shanghai Xihua Machinery Engineering Co ltd
Current assignee: Shanghai Xihua Machinery Engineering Co ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2022-12-16
Anticipated expiration: 2032-04-19

Abstract

The application relates to a self-tensioning lifting appliance for a lower chord cable, which comprises a lifting beam and at least two self-tensioning adjusting devices arranged on the lifting beam; the self-tensioning adjusting device comprises a mounting longitudinal beam, adjusting rotating arm assemblies and abutting assemblies, wherein the adjusting rotating arm assemblies and the abutting assemblies are rotatably and adjustably arranged on two sides of the mounting longitudinal beam in the length direction; any adjusting rotating arm group is provided with an upper lifting rigging, any adjusting rotating arm component is provided with a lifting part, and a bottom rope-mounting rigging is arranged between the lifting parts of the two adjusting rotating arm components. This application has improved the hoist and mount efficiency to the profile shapes.

Description

Self-tensioning lifting appliance for lower chord cable

Technical Field

The invention relates to the technical field of hoisting equipment, in particular to a lower chord cable self-tensioning type hoisting tool.

Background

Under the background of double carbon in China, the demand for recyclable clean energy is strong day by day, and power plants using wind energy, water energy, tide and the like represented by the flow energy on the earth are increasingly constructed. In the construction of these power plants, it is often necessary to hoist some parts with special cross sections, such as blades of wind turbines, towers of wind turbines, blades of water turbines, and other long-rod-shaped special-shaped parts with special cross sections.

In the related art, a rigid arm C-type or SC-type lifting appliance is often used for clamping and hoisting, and the following technical problems exist in the hoisting process:

(1) the universality is not strong, the clamp body needs to be integrally replaced or partially replaced to meet the requirements of different sizes and shapes, and the structure is complex;

(2) in the process of alignment installation, accurate alignment is usually ensured by manually pulling a hoist or connecting a rope body for the butt joint of the fan blade and the hub, and due to the limitation of an installation space, certain risk exists in the safety of personnel and the operation is inconvenient;

(3) the lifting appliance in the related art is difficult to separate, most of the reasons are that the lifting appliance needs to be manually disassembled from a lifting part, and some of the lifting appliance needs to readjust the posture of the clamp body after the load is disassembled because the posture of the clamp body is changed;

(4) for the single-blade hoisting technology, horizontal alignment installation is adopted, and the position of a hub needs to be adjusted every time the single-blade hoisting technology is installed.

In the whole hoisting operation, the whole hoisting efficiency can be greatly influenced, and a part to be improved exists.

SUMMERY OF THE UTILITY MODEL

In order to improve hoist and mount efficiency, this application provides a lower chord cable is from tensioning formula hoist.

The application provides a pair of lower chord cable is from tensioning formula hoist adopts following technical scheme:

a self-tensioning lifting appliance for a lower chord cable comprises a lifting beam and self-tensioning adjusting devices arranged on the lifting beam, wherein at least two self-tensioning adjusting devices are arranged;

the self-tensioning adjusting device comprises a mounting longitudinal beam which is adjustably arranged along the length direction of the hoisting cross beam and adjusting rotating arm assemblies which are rotatably and adjustably arranged on two sides of the mounting longitudinal beam in the length direction; an upper hoisting rigging is arranged at the end part of any one of the adjusting rotating arm assemblies far away from the rotating connection part of the adjusting rotating arm assembly, a hoisting part is arranged at any one of the adjusting rotating arm assemblies, and a bottom bagging rigging for bagging the special-shaped piece is arranged between the hoisting parts of the two adjusting rotating arm assemblies;

the self-tensioning adjusting device further comprises an abutting assembly which is arranged at the bottom of the mounting longitudinal beam in a lifting adjustable mode and used for abutting against the top of the special-shaped piece.

By adopting the technical scheme, the bottom pocket rigging is utilized to be mounted on the special-shaped section of the blade or the special-shaped part of the tower barrel, and then the upper hoisting rigging is utilized to be hooked on a crane or a lifting sling, so that the integral mounting position is convenient to adjust; at the moment, the rotating arm assembly is pulled upwards by the upper hoisting rigging and swings upwards, the bottom part of the special-shaped piece is subjected to bagging operation by the bottom part bagging rigging under the action of the self weight of the special-shaped piece, and then the top part lifting assembly which is arranged in a lifting mode is abutted against the top part of the special-shaped piece, so that blades or a tower barrel with special-shaped sections can be fixed and clamped, and the universality of the lifting appliance is greatly improved;

when the special-shaped section special-shaped piece is separated, the rotating angles of the two side adjusting rotating arm assemblies are adjusted only, so that the two side adjusting rotating arm assemblies rotate along the direction in which the bottom sides are close to each other, the bottom bag-mounted rigging can be in a loose state, the separating operation of the special-shaped section special-shaped piece can be completed, and the special-shaped section special-shaped piece is convenient and quick;

in addition, the adjusting rotating arm assemblies arranged on the two sides of the mounting longitudinal beam can be adjusted by rotating, the rotating angles of the adjusting rotating arm assemblies on the two sides are adjusted, different tensioning degrees of riggings arranged at the left side and the right side of the bottom pocket are realized through different rotating angles, the adjustment of the pitch-changing direction angle of the special-shaped section special-shaped piece is realized by combining the self weight of the special-shaped section special-shaped piece, and the mounting angle of the special-shaped section special-shaped piece can be directly adjusted during hoisting operation.

Preferably, the lifting part is provided with a plurality of lifting parts along the length direction of the adjusting rotating arm assembly.

Through adopting above-mentioned technical scheme, be provided with a plurality ofly with hoist and mount portion along the length direction who adjusts rocking arm subassembly, and then adjust the interval of two hoist and mount positions of bottom pocket dress rigging, further adapt to different cross sectional area's pocket dress operation.

Preferably, the first rotating arm and the abutting assembly comprise an abutting swing frame which is arranged at the bottom of the installation longitudinal beam in a lifting adjustable mode and an abutting block which is arranged on the abutting swing frame and used for abutting against the top of the special-shaped piece, and the abutting swing frame and the installation longitudinal beam are connected in a rotating mode.

Through adopting above-mentioned technical scheme, during the operation of actual butt, utilize the adjustable butt rocker that sets up of lift to the butt height of adaptation different cross-sections, simultaneously, utilize the rotation between butt rocker and the installation longeron to be connected, on the one hand, adaptable different cross-sectional shape, along with adjusting the fine setting of rocking arm subassembly to the profile shape becomes the oar angle, still can adapt to the cross-sectional shape of profile shape under different angles.

Preferably, adjust rocking arm subassembly and include that the tip rotates first rocking arm and the second rocking arm of connection on the installation longeron, upper portion hoist and mount rigging sets up the other end at first rocking arm, be provided with the second roll adjustment part that is used for adjusting both intervals between first rocking arm and the second rocking arm, hoist and mount portion sets up on the second rocking arm, the axis of rotation of first rocking arm and second rocking arm is parallel with the length direction of hoist and mount crossbeam.

By adopting the technical scheme, the second distance adjusting component between the first rotating arm and the second rotating arm is utilized to adjust the distance between the first rotating arm and the second rotating arm, so that the height of the hoisting part on the second rotating arm is changed, when two self-tensioning adjusting devices are utilized for hoisting operation, the height of the hoisting part in one self-tensioning adjusting device is changed, and further the adjustment of the inclination angle of the special-shaped part can be realized so as to adapt to the hoisting installation operation of different inclined planes.

Preferably, the second distance adjusting component comprises a connecting rod assembly, one end of the connecting rod assembly is rotatably connected to the first rotating arm, the other end of the connecting rod assembly is rotatably connected to the second rotating arm, and the rotating axis of the connecting rod assembly is parallel to the rotating axis of the first rotating arm.

Through adopting above-mentioned technical scheme, utilize the link assembly between first rocking arm and the second rocking arm, and then form four-bar linkage between first rocking arm, second rocking arm, installation longeron and the link assembly, along with the difference of first rocking arm rotation angle, realize the regulation to second rocking arm rotation angle, and then realize the roll adjustment operation between first rocking arm and the second rocking arm.

Preferably, the connecting rod assembly is detachably and fixedly connected with the rotating connection position of the first rotating arm and the second rotating arm.

By adopting the technical scheme, the detachable fixed connection formed by the connecting rod assembly along the length direction of the first rotating arm and the second rotating arm is utilized, and then the distance adjusting function between the first rotating arm and the second rotating arm can be realized by replacing the connecting rod assembly with different lengths.

Preferably, a plurality of detachable and fixed connecting positions of the first rotating arm and the second rotating arm and the connecting rod assembly are arranged along the respective length directions.

By adopting the technical scheme, the positions of the rotary joints at the two ends of the connecting rod assembly are changed, and the function of adjusting the distance between the first rotating arm and the second rotating arm is realized on the premise of not changing the connecting rod assembly.

Preferably, the second distance adjusting component comprises a connecting rope body fixedly arranged on the first rotating arm and the second rotating arm and a retraction assembly for retracting the connecting rope body.

By adopting the technical scheme, the connecting rope body can be always in a tightened state in the hoisting process, and at the moment, the winding and unwinding operation of the connecting rope body is realized by utilizing the winding and unwinding assembly, so that the convenience and the precision of distance adjustment of the first rotating arm and the second rotating arm are greatly improved.

Preferably, receive and release the subassembly and include mount, fixed pulley, rolling machine and movable pulley, the mount can be dismantled and fix on first rocking arm, the fixed pulley rotates to be connected on the mount, the rolling machine is fixed on the mount and with the coaxial fixed connection of fixed pulley, the movable pulley rotates to be connected on the second rocking arm, the one end of connecting the rope body is fixed on the fixed pulley, the other end of connecting the rope body is in proper order around setting for pulley and movable pulley and fix on the mount, the axis of rotation of rolling machine, fixed pulley and movable pulley is parallel with the axis of rotation of first rocking arm.

By adopting the technical scheme, in actual use, the winding and unwinding operation of the fixed pulley on the connecting rope body is realized by using the winding machine, the connecting rope body is wound on the movable pulley, the movable pulley is lifted along with the winding and unwinding operation of the connecting rope body, the second rotating arm is rotated along the direction close to or far away from the first rotating arm, the distance adjusting operation between the first rotating arm and the second rotating arm is realized, and in the distance adjusting mode, the load on the winding and unwinding assembly can be reduced by using the movable and fixed pulley rope group.

Preferably, the first rotating arm is rotatably provided with a first hinged seat, the hoisting crossbeam is rotatably provided with a second hinged seat, the rotating axes of the first hinged seat and the second hinged seat are parallel to the rotating axis of the first rotating arm, and a first distance adjusting component is arranged between the first hinged seat and the second hinged seat.

By adopting the technical scheme, the first distance adjusting component can be used for realizing the distance adjusting operation between the first hinged seat and the second hinged seat, so that the rotating angle of the first rotating arms at two sides is adjusted, and the fine adjustment operation of the variable pitch angle of the special-shaped piece is realized.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the hoisting positions on the bottom pocketed rigging are more flexible by utilizing the hoisting parts arranged along the length direction of the second rotating arm, the inner wrap angle of the bottom pocketed rigging is adjusted within a proper angle, and meanwhile, the hoisting parts can adapt to the lengths of different bottom pocketed rigging; the method is more suitable for special-shaped pieces with different cross-sectional areas; the bottom pocket rigging adopts suspender or rope that the winding is good, can adapt to various special-shaped cross section shapes, and then improves the commonality of this application greatly.

2. This application utilizes the dead weight of mechanical section to combine ascending hoist and mount traction force, alright realize first rocking arm and the automatic rotation of second rocking arm, realize the pocket dress operation of bottom pocket dress rigging, and then realize the preliminary locking to mechanical section, later combine the butt subassembly again, alright realize the mechanical section auto-lock operation.

3. Utilize first roll adjustment part between first articulated seat and the articulated seat of second, the atress is more reasonable, only can receive the dead weight of this hoist, helps improving the life of first roll adjustment part.

4. The scheme that the first rotating arm and the second rotating arm are arranged on the mounting longitudinal beam in a rotating mode and are pulled by the winch pulley block can enable the heavy object to deflect a large angle in the transverse direction of the lifting appliance. The degree of freedom of the lifting appliance is increased, and the lifting appliance is more convenient and flexible.

Drawings

Fig. 1 is a partial sectional view from an elevation view of an embodiment of the present application, which mainly shows an overall structure of a lower chord cable self-tensioning spreader;

fig. 2 is a partially enlarged view of a portion a in fig. 1, which mainly shows a structure of a plug hole and a plug pin;

FIG. 3 is a side view of an embodiment of the present disclosure showing the structure of an abutment assembly;

fig. 4 is a schematic view mainly showing a structure of a first distance adjusting part according to an embodiment of the present application;

fig. 5 is a schematic view of a state mainly embodying horizontal stable hoisting in the embodiment of the present application;

fig. 6 is a partial sectional view from an elevation view of a second embodiment of the present application, which mainly shows an overall structure of a lower chord self-tensioning spreader;

fig. 7 is a partial sectional view from an elevation view of a third embodiment of the present application, which mainly shows an overall structure of a lower chord cable self-tensioning spreader;

fig. 8 is a schematic view of a state of mainly embodying oblique stable hoisting in the third embodiment of the present application.

Reference numerals: 1. hoisting the beam; 11. a pin hole; 2. a self-tensioning adjustment device; 21. mounting a longitudinal beam; 211. a plug pin; 212. a second hinge mount; 22. adjusting the rotating arm assembly; 221. a first rotating arm; 2211. a first hinge mount; 222. a second rotating arm; 2211. a hoisting part; 223. a first pitch adjustment member; 224. a second distance adjusting component; 2241. a connecting rod; 2242. connecting a rope body; 2243. a retraction assembly; 22431. a fixed mount; 22432. a fixed pulley; 22433. a winding machine; 22434. a movable pulley; 23. hoisting rigging at the upper part; 24. rigging is arranged at the bottom part in a bag way; 25. an abutment assembly; 251. abutting against the oil cylinder; 252. abutting against the swing frame; 253. a butting block.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses lower chord cable is from tensioning formula hoist.

Example 1

Referring to fig. 1, the self-tensioning lifting appliance for the lower chord cable comprises a lifting beam 1 and a plurality of self-tensioning adjusting devices 2 detachably arranged along the length direction of the lifting beam 1, the structure and the installation mode of any one self-tensioning adjusting device 2 are the same, and one self-tensioning adjusting device 2 is taken as an example for explanation.

Referring to fig. 1, the self-tensioning adjusting device 2 comprises a mounting longitudinal beam 21 and adjusting rotating arm assemblies 22 rotatably and adjustably arranged on two sides of the mounting longitudinal beam 21 in the length direction, the rotating axis of any adjusting rotating arm assembly 22 is parallel to the length direction of the hoisting cross beam 1, an upper hoisting rigging 23 is arranged at the end part of any adjusting rotating arm assembly 22 far away from the rotating connection part, and the upper hoisting rigging 23 can be directly hooked with a hoisting hook of a crane or connected to other hoists;

with reference to fig. 1, the self-tensioning adjustment device 2 further comprises a bottom pocketing rigging 24 for pocketing the profile, arranged between the two adjustment swivel arm assemblies 22, and an abutment assembly 25 for abutting the top of the profile, arranged elevationally adjustable at the bottom of the mounting stringers 21.

In actual use, utilize bottom pocket dress rigging 24 and upper portion hoist and mount rigging 23, and combine the dead weight and the butt subassembly 25 of profile part, realize carrying out the pocket dress to the profile part from the locking, and the cooperation sets up a plurality ofly from tensioning adjusting device 2, realize the regulation to profile part inclination, and from tensioning adjusting device 2 usable rotation adjustable regulation rocking arm subassembly 22, adjust the endocyst angle of bottom pocket dress rigging 24, realize the fine setting to the profile part becomes oar angle, in order to accomplish accurate installation regulation.

Referring to fig. 1 and 2, a plurality of plug pin holes 11 are formed in the hoisting cross beam 1 along the length direction of the hoisting cross beam, the installation longitudinal beam 21 is sleeved on the hoisting cross beam 1, and the plug pins 211 matched with the plug pin holes 11 in a plug manner are arranged on the installation longitudinal beam 21 in a plug manner, so that the installation longitudinal beam 21 is detachably and fixedly connected with the hoisting cross beam 1.

Referring to fig. 1 and 3, the abutting assembly 25 includes an abutting oil cylinder 251, an abutting swing frame 252 and an abutting block 253, the cylinder body of the abutting oil cylinder 251 is fixed at the bottom of the installation longitudinal beam 21, the piston rod of the abutting oil cylinder 251 is vertically and downwardly arranged, the abutting swing frame 252 is rotatably connected to the end of the piston rod of the abutting oil cylinder 251 through a pin shaft, the abutting block 253 is arranged at the bottom of the abutting swing frame 252 along the length direction of the installation longitudinal beam 21 at intervals and rotatably connected to the bottom of the abutting swing frame 252, the rotation axes of the abutting swing frame 252 and the abutting block 253 are parallel to the length direction of the hoisting cross beam 1, and the abutting block 253 abuts against the side wall of the radial top of the special-shaped piece along with the expansion and contraction of the abutting oil cylinder 251, so that the special-shaped piece is safely locked.

Referring to fig. 1 and 4, since the adjustment boom assemblies 22 on both sides are identical in construction and mounting, the adjustment boom assembly 22 on the same side will now be described by way of example.

Referring to fig. 1 and 4, the adjusting rotating arm assembly 22 includes a first rotating arm 221, one end of the first rotating arm 221 is rotatably connected to the mounting longitudinal beam 21, an upper hoisting rigging 23 is disposed at an end of the first rotating arm 221 away from the rotatable connection, a plurality of hoisting portions 2211 are disposed in a middle section of the first rotating arm 221 along a length direction thereof, and the hoisting portions 2211 may be configured as hoisting ear plates; the bottom rigging 24 is arranged on the hoisting parts 2211 of the two first rotating arms 221; a first hinge seat 2212 is rotatably connected to the first rotating arm 221, and a plurality of first hinge seats 221 may be arranged on the first rotating arm 221, in this embodiment, two first hinge seats 221 are arranged; the hoisting crossbeam 1 is rotatably connected with a second hinged seat 212, and the second hinged seat 212 is detachably and fixedly connected along the length direction of the hoisting crossbeam 1 through an installation lug plate and a rotating pin; the adjusting swivel arm assembly 22 further comprises a first distance adjusting part 223 arranged between the first and second hinge seats 2212 and 212, wherein the swivel axes of the first swivel arm 221, the first and second hinge seats 2212 and 212 are all parallel to the length direction of the hoisting beam 1

Referring to fig. 1 and 4, the first distance adjusting component 223 may be configured as a linear transmission mechanism, and the linear transmission mechanism may include a linear oil cylinder, a rack and pinion, a lead screw nut, and the like, and may also be configured as a link transmission mechanism to achieve the purpose of adjusting the distance between the first hinge seat 2212 and the second hinge seat 212, in this embodiment, the first distance adjusting component 223 is configured as a linear oil cylinder, and a displacement detection control electronic module is disposed on the linear oil cylinder to adjust the stretching amount of the linear oil cylinder; the bottom end of the cylinder body of the linear oil cylinder is fixed on the first hinge base 2212, and the end of the piston rod of the linear oil cylinder is fixed on the second hinge base 212. The PLC in the displacement detection hole electronic module can control and adjust the telescopic formation of the two linear oil cylinders, and then the rotating angle of the two first rotating arms 221 is achieved.

The implementation principle of this application embodiment a lower chord cable is from tensioning formula hoist does:

the bottom-mounted rigging 24 is mounted on a special-shaped part such as a blade or a tower drum with a special-shaped section, and the bottom-mounted rigging 24 can adopt a sling or a rope with good flexibility and has a certain friction force; then, the upper hoisting rigging 23 is hooked on a crane or a lifting sling, so that the integral installation position can be conveniently adjusted; at this time, the two first rotating arms 221 are pulled upwards by the upper hoisting rigging 23 and swing upwards, at this time, the two linear oil cylinders are in a free state, that is, under the action of the self weight of the special-shaped piece, the bottom packing rigging 24 carries out packing operation on the bottom of the special-shaped piece, and then the abutting oil cylinder 251 is utilized to drive the abutting block 253 to descend to abut against the top of the special-shaped piece, so that the blades or the tower drum with the special-shaped section are fixed and clamped, and the universality of the lifting appliance is greatly improved;

when the special-shaped section special-shaped piece needs to be separated, the separation operation of the special-shaped section special-shaped piece can be completed conveniently and quickly by only adjusting the two linear oil cylinders to perform extension movement and increasing the included angle between the two upper hoisting riggings 23 to enable the bottom pocket rigging 24 to be in a loose state;

referring to fig. 4, the included angle between the two upper hoisting riggings 23 and the middle vertical line can be adjusted by using two linear oil cylinders, the different tensioning degrees of the bottom rigging 24 on the left side and the right side are changed, that is, the inner wrap angle of the bottom rigging 24 is changed, and the adjustment of the pitch direction angle of the special-shaped section special-shaped piece is realized by combining the self weight of the special-shaped section special-shaped piece, and during the hoisting operation, the installation angle of the special-shaped section special-shaped piece can be directly adjusted.

Referring to fig. 5, two self-tensioning adjusting devices 2 are installed on the lifting beam 1 at intervals, so that the special-shaped piece can be stably and horizontally lifted.

Example 2

Referring to fig. 6, the present embodiment is different from embodiment 1 in that,

the adjusting rotating arm assembly 22 further comprises a second rotating arm 222, and in other embodiments, the adjusting rotating arm assembly 22 may further comprise a plurality of rotating arms such as a third rotating arm rotatably connected with the hoisting beam 1 according to the use and hoisting conditions. One end of the second rotating arm 222 is rotatably connected to the mounting longitudinal beam 21 and is located below the first rotating arm 221, in the embodiment of the present application, a plurality of hoisting portions 2211 are arranged on the second rotating arm 222 and are arranged along the length direction of the second rotating arm, and the bottom rigging cables 24 are arranged on the hoisting portions 2211 of the two second rotating arms 222; the adjusting rotation arm assembly 22 further includes a second distance adjusting part 224 disposed between the first rotation arm 221 and the second rotation arm 222.

The adjustment of the position of the profile is achieved by adjusting the distance between the first swivel arm 221 and the second swivel arm 222 by means of the second distance adjustment member 224.

Referring to fig. 6, the second distance adjustment member 224 is provided as a link assembly, which may include a plurality of connecting rods 2241 rotatably connected end to end, wherein the ends of the connecting rods 2241 at both ends are rotatably connected to the first rotating arm 221 and the second rotating arm 222, respectively, and in the embodiment of the present application, the link assembly is provided as one connecting rod 2241, one end of the connecting rod 2241 is rotatably connected to the first rotating arm 221, the other end of the connecting rod 2241 is rotatably connected to the second rotating arm 222, and the rotation axis of the connecting rod 2241 is parallel to the rotation axis of the first rotating arm 221, wherein both ends of the connecting rod 2241 are fixedly connected to the first rotating arm 221 and the second rotating arm 222 by a pin and a pin hole, and the first rotating arm 221 and the second rotating arm 222 are provided with a plurality of pin holes forming a detachable fixed connection with the ends of the connecting rod 2241 in their respective length directions.

in practice, the operator can adjust the distance between the first rotating arm 221 and the second rotating arm 222 by replacing the connecting rod 2241 with different lengths, and can adjust the first rotating arm 221 and the second rotating arm 222 by connecting the connecting rod 2241 with the same length into different pin holes of the first rotating arm 221 and the second rotating arm 222.

Example 3

Referring to fig. 7, the present embodiment is different from embodiment 2 in that,

the second distance adjusting component 224 includes a connecting rope 2242 fixedly disposed on the first rotating arm 221 and the second rotating arm 222 and a retracting component 2243 for retracting the connecting rope 2242, in the embodiment of the present application, the retracting component 2243 includes a fixed frame 22431, a fixed pulley 22432, a winding machine 22433 and a movable pulley 22434, the fixed frame 22431 is hooked on the first rotating arm 221 by means of hooking, the fixed pulley 22432 is rotatably connected to the fixed frame 22431, the winding machine 22433 is mounted on the fixed frame 22431, the fixed pulley 22432 is coaxially and fixedly connected with the output shaft of the winding machine 22433, the movable pulley 22434 is rotatably connected with the end portion of the second rotating arm 222, the connecting rope 2242 is set as a steel wire rope, one end of which is fixed on the fixed pulley 22432, the other end of the steel wire rope winds around the set pulley 22432 and the movable pulley 22434 and is fixed on the bottom side of the fixed frame 22431, and the rotation axes of the winding machine 22433, the fixed pulley 22432 and the movable pulley 22434 are parallel with the rotation axis of the first rotating arm 221.

The implementation principle of the embodiment 3 is as follows:

the winding and unwinding operations of the fixed pulley 22432 on the steel wire rope are realized by the winding machine 22433, and the steel wire rope is wound on the movable pulley 22434, so that the movable pulley 22434 is lifted along with the winding and unwinding operations of the steel wire rope, the second rotating arm 222 is rotated in a direction close to or far away from the first rotating arm 221, and the distance adjusting operation between the first rotating arm 221 and the second rotating arm 222 is realized.

Referring to fig. 8, two self-tensioning adjusting devices 2 are mounted on the hoisting beam 1 at intervals, wherein the steel wire rope in one self-tensioning adjusting device 2 is driven by a winding machine 22433 to be in a winding state, the steel wire rope in the other self-tensioning adjusting device 2 is driven by the winding machine 22433 to be in an unwinding state, and then the rotation angles of the second rotating arms 222 in the two self-tensioning adjusting devices 2 are different, so that the special-shaped piece mounted by the bottom mounting rigging 24 is in an inclined state, and further, the hoisting and mounting of the inclined position of the special-shaped piece are met.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a lower chord cable is from tensioning formula hoist which characterized in that: the self-tensioning device comprises a hoisting crossbeam (1) and self-tensioning adjusting devices (2) arranged on the hoisting crossbeam (1), wherein at least two self-tensioning adjusting devices (2) are arranged;

the self-tensioning adjusting device (2) comprises a mounting longitudinal beam (21) which is adjustably arranged along the length direction of the hoisting cross beam (1) and adjusting rotating arm assemblies (22) which are rotatably and adjustably arranged on two sides of the mounting longitudinal beam (21) in the length direction; an upper hoisting rigging (23) is arranged at the end part, far away from the rotating connection part, of any one adjusting rotating arm assembly (22), a hoisting part (2211) is arranged on any one adjusting rotating arm assembly (22), and a bottom pocketed rigging (24) for pocketing a special-shaped piece is arranged between the hoisting parts (2211) of the two adjusting rotating arm assemblies (22);

the self-tensioning adjusting device (2) further comprises an abutting assembly (25) which is arranged at the bottom of the mounting longitudinal beam (21) in a lifting adjustable mode and used for abutting against the top of the special-shaped piece.

2. The self-tensioning sling for lower chord cables according to claim 1, wherein: the hoisting parts (2211) are arranged in a plurality along the length direction of the adjusting rotating arm assembly (22).

3. The bottom chord self-tensioning hanger according to claim 1, wherein: the abutting assembly (25) comprises an abutting swing frame (252) which is arranged at the bottom of the mounting longitudinal beam (21) in a lifting adjustable mode and an abutting block (253) which is arranged on the abutting swing frame (252) and used for abutting the top of the special-shaped piece, and the abutting swing frame (252) is connected with the mounting longitudinal beam (21) in a rotating mode.

4. The self-tensioning sling for lower chord cables according to claim 1, wherein: adjust rocking arm subassembly (22) and include that the end rotates first rocking arm (221) and second rocking arm (222) of connecting on installation longeron (21), upper portion hoist and mount rigging (23) set up the other end at first rocking arm (221), be provided with between first rocking arm (221) and second rocking arm (222) and be used for adjusting second roll adjustment part (224) of both intervals, hoist and mount portion (2211) sets up on second rocking arm (222).

5. The self-tensioning sling according to claim 4, wherein: the second distance adjusting component (224) comprises a connecting rod assembly, one end of the connecting rod assembly is rotatably connected to the first rotating arm (221), the other end of the connecting rod assembly is rotatably connected to the second rotating arm (222), and the rotating axis of the connecting rod assembly is parallel to that of the first rotating arm (221).

6. The self-tensioning sling according to claim 5, wherein: the connecting rod assembly is detachably and fixedly connected with the rotating connection position of the first rotating arm (221) and the second rotating arm (222).

7. The self-tensioning sling according to claim 6, wherein: the detachable and fixed connection positions of the first rotating arm (221) and the second rotating arm (222) and the connecting rod assembly are provided with a plurality of parts along the length direction of the connecting rod assembly.

8. The self-tensioning sling according to claim 4, wherein: the second distance adjusting component (224) comprises a connecting rope body (2242) fixedly arranged on the first rotating arm (221) and the second rotating arm (222) and a collecting and releasing assembly (2243) for collecting and releasing the connecting rope body (2242).

9. The self-tensioning sling according to claim 8, wherein: receive and release subassembly (2243) including mount (22431), fixed pulley (22432), rolling machine (22433) and movable pulley (22434), mount (22431) can be dismantled and fix on first rocking arm (221), fixed pulley (22432) rotate to be connected on mount (22431), rolling machine (22433) are fixed on mount (22431) and with fixed pulley (22432) coaxial fixed connection, movable pulley (22434) rotate to be connected on second rocking arm (222), the one end of connecting rope body (2242) is fixed on fixed pulley (22432), the other end of connecting rope body (2242) is in proper order round set for pulley (22432) and movable pulley (22434) and fix on mount (22431), the rotation axis of rolling machine (22433), fixed pulley (22432) and movable pulley (22434) is parallel with the rotation axis of first rocking arm (221).

10. The self-tensioning sling according to claim 4, wherein: rotate on first articulated arm (221) and be provided with first articulated seat (2212), it is provided with the articulated seat of second (212) to rotate on hoist and mount crossbeam (1), the axis of rotation of the articulated seat of first articulated seat (2212) and second (212) all is parallel with the axis of rotation of first articulated arm (221), be provided with first roll adjustment part (223) between the articulated seat of first articulated seat (2212) and second (212).