CN217535243U - Self-climbing crane - Google Patents

Abstract

The application provides a hoist that climbs certainly, be applicable to the cable tower of two tower column types, it includes the steel truss, hydraulic jack hoist system and hoist engine hoist system, the steel truss is to extending and erect at two tops at the tower column under construction along the cross-bridge, the steel truss is equipped with the opening in its length direction's one end, hydraulic jack hoist system locates on the steel truss and is located between two tower columns, hydraulic jack hoist system is equipped with two sets on the steel truss, hoist engine hoist system is equipped with one set on the steel truss, hoist engine hoist system can follow the lengthwise direction removal of steel truss, be lifted by crane to the transportation along the cross-bridge the bridge construction spare. This application is when lifting by crane steel tower segment section or steel crossbeam segmentation, is hoisted by hoist engine hoist system removal to setting up at the distolateral opening part of steel truss and hoists, feeds the roof beam position to changing into the cross bridge to by indulging the bridge conventionally, supports the hoist that climbs certainly through two pylons, and the reinforcing is from climbing hoist structural stability and bearing capacity, ensures the stability of hoist and mount process.

Description

Self-climbing crane

Technical Field

The application relates to the field of bridge construction, in particular to a self-climbing crane.

Background

A cable-stayed bridge is also called a diagonal tension bridge, is a bridge with a main beam directly pulled on a bridge tower by a plurality of guys, and is a structural system formed by combining a pressure-bearing tower, a pulled guy and a bending-bearing beam body. It can be regarded as a multi-span elastic support continuous beam with guy cables instead of buttresses. It can reduce the bending moment in the beam body, reduce the building height, lighten the structural weight and save materials. The cable-stayed bridge mainly comprises a cable tower, a main beam and a stay cable. The existing common tower cranes hoist the steel tower segments and the steel beam segments of the tower column, and because the steel tower segments and the steel beam segments are heavy, the tower cranes with large tonnage are often needed in the installation of the tower cranes, so that the construction cost is high, and the horizontal thrust of the tower crane attached walls to the tower column during construction is large, so that the horizontal thrust of the tower crane attached walls is easily beyond the stress limit of a cable tower structure, and the stress of a bridge is very unfavorable.

SUMMERY OF THE UTILITY MODEL

The purpose of the application is to provide a self-climbing crane with high bearing capacity.

In order to achieve the above object, the present application provides the following technical solutions:

the utility model provides a from hoist that climbs, is applicable to cable tower of two pylon types, includes steel truss, hydraulic jack lift system and hoist engine lift system, the steel truss extends and erects at the top of two tower columns under construction along the cross-bridge direction, the steel truss is located its length direction's one end and is equipped with the opening, hydraulic jack lift system locates on the steel truss and be located between two tower columns for along vertical direction hoisting bridge structures, hydraulic jack lift system is equipped with two sets on the steel truss, hoist engine lift system is in be equipped with one set on the steel truss, and hoist engine lift system can follow the lengthwise direction removal of steel truss, be used for along the cross-bridge to the transportation by crane bridge structures.

Further setting: the steel truss is provided with an opening at the beam feeding end, and the end side of the opening of the steel truss extends to the outer side of the tower column and extends downwards towards the tower column in an inclined mode.

Further setting: the winch lifting system comprises a winch lifting support, a winch and a steel wire rope, the winch is installed on the winch lifting support, the steel wire rope is connected with the winch to be wound and unwound through the winch, and the winch lifting support can move in the longitudinal direction of the steel truss.

Further setting: the top of the steel truss is provided with a guide rail extending along the longitudinal direction of the steel truss, and the bottom of the hoisting support of the winch is provided with a walking device matched with the guide rail.

Further setting: two groups of steel wire ropes are arranged on the hoisting support of the winch, and a lifting appliance is arranged at the end part, far away from the winch, of each steel wire rope.

Further setting: the lifting appliance comprises a lifting appliance main body, a carrying pole beam and lifting lugs, wherein the steel wire rope is connected with the lifting appliance main body, the lifting appliance main body is hinged with the middle of the upper side of the carrying pole beam, the lifting lugs are arranged at two ends of the lower side of the carrying pole beam and used for being connected with a bridge construction member, and a gradient adjusting oil cylinder is further arranged between the lifting appliance main body and the carrying pole beam.

Further setting: the hydraulic jack lifting system comprises a hydraulic jack and a steel strand, the hydraulic jack is fixed on the steel truss, and the steel strand penetrates through the middle of the hydraulic jack so as to lift the steel strand through the hydraulic jack.

Further setting: the hydraulic jack lifting system is characterized in that two groups of hydraulic jacks and steel strands are arranged between two tower columns, and the two groups of steel strands are respectively used for connecting two ends of a bridge construction member.

Further setting: the bottom of the steel truss is provided with two groups of self-climbing systems which are respectively attached to two tower columns, each group of self-climbing system comprises an anchoring seat pre-embedded on the tower column, a track attached to the anchoring seat and a climbing assembly reversely hooked on the track, and the climbing assembly and the track are fixed through pins.

Further setting: the climbing assembly comprises a climbing frame, a climbing frame jacking seat, an oil cylinder seat and a jacking oil cylinder, the top end of the climbing frame is connected with the bottom of the steel truss, the climbing frame is fixedly connected with the climbing frame jacking seat, the jacking oil cylinder is connected between the climbing frame jacking seat and the oil cylinder seat, a plugging pin hole is formed in the track, and the climbing frame jacking seat and the oil cylinder seat are respectively provided with a plug pin mechanism which can stretch out and draw back to be inserted into the plugging pin hole.

Compared with the prior art, the scheme of the application has the following advantages:

1. in the self-climbing crane, the steel truss stretches across two tower columns and is provided with two sets of lifting systems, when steel tower sections or steel cross beam sections are lifted, the steel truss can be moved to the opening arranged on the end side of the steel truss through the winch lifting system to be lifted, so that the conventional beam feeding position is changed into the transverse bridge direction from the longitudinal bridge direction, the self-climbing crane is supported through the two tower columns, the structural stability and the bearing capacity of the self-climbing crane are enhanced, and then the stability of the lifting process is ensured.

2. In the self-climbing crane, a winch lifting system and a hydraulic jack lifting system are adopted, the lifting speed of the winch lifting system is higher than the lifting speed of the hydraulic jack, the combination of two sets of lifting systems is adopted, the requirements of different lifting scenes can be met, and the speed of lifting a bridge construction member can be accelerated to accelerate the construction process.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of one embodiment of a self-climbing crane of the present application;

FIG. 2 is an enlarged view of the portion A of FIG. 1;

FIG. 3 is a schematic view of the present application of the construction from the cross bridge of a climbing crane upwards;

FIG. 4 is a schematic structural diagram of the self-climbing crane for lifting a steel cross beam;

FIG. 5 is a schematic structural diagram of a self-climbing crane of the present application with two openings and two sets of hoist lifting systems;

FIG. 6 is a schematic structural diagram of a self-climbing crane of the present application with two openings and two sets of jack lifting systems;

fig. 7 is a schematic structural diagram of a self-climbing crane of the present application with a single opening and with a set of hoist lifting systems and a set of jack lifting systems.

In the figure, 1, a steel truss; 11. an opening; 12. a slide rail; 2. a hoist lifting system; 21. the winch lifts the support; 22. a winch; 23. a wire rope; 24. a spreader; 241. a hanger body; 242. a shoulder pole beam; 243. lifting lugs; 244. a gradient adjusting oil cylinder; 3. a hydraulic jack lifting system; 31. a hydraulic jack; 32. steel strand wires; 4. a self-climbing system; 41. climbing a frame; 411. a connecting member; 42. climbing a frame jacking seat; 43. a cylinder block; 44. a jacking oil cylinder; 45. a track.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

The method for installing the multi-beam steel cable tower comprises a tower column, a plurality of steel beams and temporary supports, wherein the temporary supports are arranged on the tower column, and the temporary supports are arranged on the tower column.

Referring to fig. 1 to 4, the method for installing a multi-beam cable tower is suitable for construction of a double-tower-column-type cable tower, and the method for installing a multi-beam cable tower needs to be implemented by a self-climbing crane, specifically, the self-climbing crane includes a steel truss 1, a hydraulic jack lifting system 3 and a winch lifting system 2, the steel truss 1 extends in a cross bridge direction and is erected at the top of a tower column under construction, and the hydraulic jack lifting system 3 and the winch lifting system 2 are both provided with the top side of the steel truss 1. The hydraulic jack lifting system 3 is located between the two tower columns and used for lifting bridge building pieces in the vertical direction, and is particularly used for lifting steel cross beams located between the two tower columns. The winch lifting system 2 can move along the longitudinal direction of the steel truss 1, can move to one end side of the longitudinal direction of the steel truss 1, and can lift the bridge construction member at the end side, and meanwhile, the winch lifting system 2 can transport the bridge construction member lifted to the steel truss 1 along the longitudinal direction of the steel truss 1.

The steel truss structure hoisting system comprises a steel truss 1, a winch hoisting system 2 and a tower column, wherein the steel truss 1 is provided with openings at two ends or one end along the length direction of the steel truss, the end part of the steel truss with the openings is used as a beam feeding end of the bridge structure, the bridge structure hoisted by the winch hoisting system 2 can enter the steel truss 1 from the opening 11 for transportation, the end side of the steel truss 1 with the openings 11 extends to the outer side of the tower column, and the end side is obliquely arranged downwards towards the tower column. Because the winch lifting system 2 lifts the bridge building along the vertical direction, the inclined arrangement of the opening 11 is beneficial to the winch lifting system 2 to lift the bridge building to the opening 11 of the steel truss 1 so as to facilitate transportation.

In this embodiment, an opening is arranged at one end of the steel truss, the winch lifting system is arranged on the steel truss in a set, the winch lifting system 2 comprises a winch 22 lifting support 21, a winch 22 and a steel wire rope 23, the winch 22 is installed on the winch 22 lifting support 21, and the steel wire rope 23 is connected with the winch 22 to be retracted and extended through the winch 22. Meanwhile, a lifting appliance 24 for connecting with a bridge construction member to be lifted is arranged at the end of the steel wire rope 23 far away from the winch 22 (i.e. the end for connecting with the bridge construction member). The hanger 24 includes a hanger main body 241, a carrying pole beam 242, and lifting lugs 243, wherein the hanger main body 241 is hinged to the upper middle portion of the carrying pole beam 242, and the lifting lugs 243 are provided at both ends of the lower side of the carrying pole beam 242 for connecting with two points of a bridge structure, so that the connection strength between the hanger 24 and the bridge structure can be improved. In addition, a gradient adjustment cylinder 244 is provided between the spreader main body 241 and the carrying pole beam 242, and the gradient adjustment cylinder 244 extends and contracts to swing the carrying pole beam 242 with respect to the spreader main body 241, thereby adjusting the longitudinal gradient of the carrying pole beam 242.

Furthermore, the winch lifting system 2 is provided with two groups of steel wire ropes 23 for lifting the bridge building, correspondingly, the lifting appliances 24 are also provided with two groups, and the bridge building is lifted by the two groups of lifting appliances 24, so that the stability and the safety of the lifting operation can be greatly improved.

In addition, the top of the steel truss 1 is provided with a guide rail extending along the longitudinal direction of the steel truss, the bottom of the hoisting support 21 of the hoisting machine 22 is provided with a traveling device matched with the guide rail, and the traveling device in this embodiment can realize the movement of the hoisting support 21 of the hoisting machine 22 along the longitudinal direction of the steel truss 1 by adopting a traveling jack or a traveling wheel.

Because the winch lifting system 2 needs to move along the longitudinal direction of the steel truss 1, the winch lifting system 2 and the hydraulic jack 31 need to be arranged in a staggered mode on the transverse direction of the steel truss 1 in a lifting mode, the hydraulic jack lifting system 3 comprises the hydraulic jack 31 and the steel strand 32, the hydraulic jack 31 is fixed on the steel truss 1, the hydraulic jack 31 of the embodiment preferably adopts a center-penetrating jack, and the steel strand 32 penetrates through the middle of the hydraulic jack 31 to lift the steel strand 32 through the hydraulic jack 31, so that the purpose of lifting a bridge construction member between two tower columns is achieved.

Further, hydraulic jack hoist system 3 of this application sets up two sets, two sets between two pylons hydraulic jack hoist system 3's steel strand wires 32 is used for connecting the both ends of bridge structures respectively to promote steel strand wires 32 through two sets of hydraulic jack hoist system 3's hydraulic jack 31 respectively and in order to promote the bridge structures, ensure the stability of bridge structures hoist and mount process then.

In addition, in a preferred embodiment, please refer to fig. 5, both ends of the steel truss 1 along the length direction are provided with openings 11, and two sets of the winch lifting systems 2 can be arranged on the steel truss 1, so that the two sets of the winch systems 2 can be used for synchronously lifting the bridge construction members from the openings 11 at both ends of the steel truss 1. Through will both ends of steel truss 1 set up to opening 11, can make things convenient for two sets the hoist engine hoist system 2 promotes the bridge structures piece in step, can promote hoist and mount speed then for the construction process. In addition, the hydraulic jack system is not required to be arranged, and the construction of the tower column and the steel beam thereof can be completed through the two sets of winch lifting systems 2.

In another preferred embodiment, please refer to fig. 6, both ends of the steel truss 1 along the length direction thereof are provided with openings 11, in this embodiment, the steel truss 1 is provided with two sets of the jack-up systems 3, the bridge structure is synchronously hoisted from the openings at both ends of the steel truss 1 by using the two sets of the jack-up systems 3, the jack-up system 3 has the same function as the hoist-up system 2, and the purpose of hoisting the bridge structure can be achieved.

The winch lifting system 2 and the jack lifting system 3 both achieve the function of providing bridge construction members, so that different lifting systems can be selected for construction according to field conditions in the actual construction process. In some embodiments, referring to fig. 7, the steel truss 1 is provided with an opening 11 at one end, and is provided with a set of winch lifting system 2 and a set of jack lifting system 3, and two different sets of lifting systems are used to complete the construction of the tower column.

The self-climbing crane further comprises a self-climbing system 4 arranged at the bottom of the steel truss 1, and the self-climbing system 4 can realize that the self-climbing crane climbs along the height direction of the tower column, so that construction is facilitated, and the problem that hoisting tools such as a truck crane are difficult to construct due to insufficient height is solved. The self-climbing system 4 is provided in two groups corresponding to the two towers, and each group of the self-climbing system 4 includes an anchoring seat (not shown) pre-embedded in the side wall of the tower, a track 45 attached to the anchoring seat, and a climbing assembly reversely hooked on the track 45.

Specifically, the anchoring seat is provided with a plurality of rails 45, the rails 45 are installed on the anchoring seat and embedded in the surface of the tower column at preset intervals, and in the embodiment, at least three rails 45 are provided, and the adjacent rails 45 are connected end to end, and the rails 45 can be alternately used. When the rails 45 are inverted, the rail 45 positioned at the lowest position is transferred to the top of the rail 45 positioned at the highest position for splicing.

The climbing assembly comprises a climbing frame 41, a climbing frame jacking seat 42, an oil cylinder seat 43 and a jacking oil cylinder 44, the climbing frame 41 is fixedly connected with the climbing frame jacking seat 42, a connecting piece 411 connected with the bottom of the steel truss 1 is arranged at the top end of the climbing frame 41, the jacking oil cylinder 44 is arranged between the climbing frame jacking seat 42 and the oil cylinder seat 43, the cylinder bottom of the jacking oil cylinder 44 is fixedly connected with the oil cylinder seat 43, and the extending end of a piston rod of the jacking oil cylinder 44 is connected with the climbing frame jacking seat 42. Meanwhile, the climbing frame jacking seat 42 and the oil cylinder seat 43 are movably connected with the track 45, a plurality of inserting and pulling pin holes (not shown) are formed in the track 45 along the longitudinal direction of the track, and inserting and pulling pin mechanisms (not shown) capable of being matched with the inserting and pulling pin holes of the track 45 are arranged on the climbing frame jacking seat 42 and the oil cylinder seat 43, so that the movable connection between the climbing frame jacking seat 42 and the oil cylinder seat 43 and the track 45 is realized, the climbing frame jacking seat 42 is intermittently pushed through the jacking oil cylinder 44, the climbing assembly climbs along the track 45, and the self-climbing of the self-climbing crane is completed.

In addition, with the upward construction of the cable tower, the distance between the two tower columns of the cable tower is gradually reduced, and as the self-climbing system 4 of the self-climbing crane is attached to the tower columns, the connection position of the self-climbing system 4 and the steel truss 1 is correspondingly changed. Specifically, the position of the self-climbing system 4 connected to the position close to the opening 11 of the steel truss 1 relative to the steel truss 1 is adjustable, and the position of the self-climbing system 4 far from the opening 11 of the steel truss 1 is determined relative to the position of the steel truss 1. The self-climbing system 4 is connected with the steel truss 1 through the connecting piece 411, the connecting piece 411 comprises a first connecting seat connected with the steel truss 1 and a second connecting seat connected with a climbing frame 41 of the self-climbing system 4, a sliding rail 12 extending along the longitudinal direction of the steel truss is arranged at the position, close to the opening 11, of the bottom side of the steel truss 1, and the first connecting seat of the connecting piece 411 close to the opening 11 of the steel truss 1 is matched with the sliding rail 12, so that the self-climbing system 4 close to the opening 11 of the steel truss 1 can be suitable for reducing the aperture of a tower column to adjust the position of the tower column relative to the steel truss 1, and normal self-climbing of the self-climbing crane is ensured. In addition, the first connecting seat is hinged to the second connecting seat, and meanwhile a fastener is arranged between the first connecting seat and the second connecting seat and used for limiting the relative rotation of the first connecting seat and the second connecting seat. Because the distance between two tower columns of the cable tower is gradually reduced along with the height, the steel truss 1 can be kept horizontal through the hinged arrangement of the sliding rail 12, the first connecting seat and the second connecting seat, and the hoisting stability of the bridge construction member is ensured.

This application will promote the position of feeding the roof beam from the hoist that climbs and change into horizontal bridge by the longitudinal bridge to increased the quantity that the hoist that climbs certainly supported the support body, supported by current single pylon and changed into two pylons and support, improved structural stability and bearing capacity, can realize that many crossbeams cable tower installs the crossbeam under the condition that need not to set up the temporary connection anchor point. Moreover, the self-climbing crane is also provided with a double-lifting system of a winch lifting system 2 and a hydraulic jack lifting system 3, and the winch lifting system 2 and a speed block can be adopted for lifting the tower column segment or the steel beam segment; hydraulic jack 31 can be used as the steel crossbeam that the completion was assembled in whole promotion, and convenient construction need not to set up temporary connection fixing base and interim stull, greatly reduced the construction degree of difficulty and construction risk.

The installation method of the multi-beam steel cable tower is completed by adopting the self-climbing crane, and specifically comprises the following steps:

firstly, a steel tower segment at the bottom layer of a tower column is hoisted by utilizing a truck crane or a floating crane at a bearing platform for installation, after the construction reaches a certain height, a self-climbing crane is installed at the tops of two adjacent tower columns of a cable tower meeting the height requirement, the self-climbing crane is used for hoisting the steel tower segment of the tower column, a steel cross beam and segments thereof, and the construction of the steel cross beam is carried out from bottom to top along with the increase of the height of the tower column.

And hoisting the steel tower segment of the tower column by using the winch hoisting system 2 of the self-climbing crane, and hoisting the steel tower segment by using the winch hoisting system 2 to move along the longitudinal direction of the steel truss 1 so as to be correspondingly transported to the upper part of the tower column to facilitate the construction of the tower column.

When the tower column is constructed above the installation position of the first steel cross beam, the first steel cross beam can be lifted to the installation position by the self-climbing crane and welded and fixed. As the first steel beam is used as the beam at the bottommost part of the multi-beam cable tower, and no other bridge structure is blocked below the first steel beam, the prefabricated first steel beam can be integrally lifted by the hydraulic jack lifting system 3 of the self-climbing crane. And after the first steel beam construction is finished, continuously constructing the tower column.

When the tower column is constructed above the installation position of the second steel beam, the self-climbing crane is utilized to hoist the subsection of the second steel beam to the constructed first steel beam, the first steel beam is used as the assembly foundation of the second steel beam, the second steel beam is assembled on the first steel beam, and then the assembled second steel beam is hoisted to the installation position of the first steel beam by the self-climbing crane for welding and fixing.

When a second steel beam is hoisted, the winch hoisting system 2 of the self-climbing crane can be firstly utilized to hoist the steel beam subsections at the opening 11 of the steel truss 1, then the subsections of the steel beam are transported along the lengthwise direction of the steel truss 1 through the winch hoisting system 2, the lower parts of the subsections of the steel beam are placed on the assembled first steel beam, the positions of the subsections of the lower steel beam can be adjusted at any time so as to be convenient for assembling the steel beam, after the second steel beam is assembled on the first steel beam, the hydraulic jack hoisting system 3 of the self-climbing crane is connected with the two ends of the second steel beam, so that the assembled second steel beam is hoisted from the first steel beam to the installation position of the second steel beam to be welded and fixed.

And then, continuing to construct the tower column and the rest steel beams, and installing the second steel beam to complete the construction of the rest steel beams.

The multi-beam cable tower of the embodiment is provided with four steel beams, a first steel beam positioned at the bottom can be directly hoisted from the ground or a floating crane, a second steel beam positioned above the first steel beam and sequentially arranged, a third steel beam and a fourth steel beam can be hoisted to the constructed steel beam below the steel beam to be constructed in a segmental manner by a self-climbing crane, and then the assembled steel beam is hoisted to the installation position for welding and fixing, so that a temporary fixing installation seat and other temporary supporting parts are not required to be arranged on the tower column. And, the dead weight of steel crossbeam is great, and this application hoists steel crossbeam subsection to regard as the basis of assembling of upper steel crossbeam with the steel crossbeam that is located the below, convenient construction has reduced the too big installation degree of difficulty and the too big problem of risk that leads to of atress of integral hoisting steel crossbeam simultaneously, has accelerated the construction progress greatly.

In conclusion, the self-climbing crane is adopted to complete construction of the multi-beam cable tower, the conventional beam feeding position of the self-climbing crane is changed from a longitudinal bridge direction to a transverse bridge direction, so that the self-climbing crane is supported through two tower columns, the structural stability and the bearing capacity of the self-climbing crane are enhanced, the stability of the hoisting process is ensured, and the self-climbing crane is not only applied to construction of cable tower body assembly, main beam structure assembly and the like of the multi-beam cable tower, but also can be applied to transportation of other building construction pieces of a bridge. Meanwhile, when the steel cross beam is installed in the installation method of the multi-cross-beam cable tower, the steel cross beam positioned above the steel cross beam can be used as an assembly foundation for the steel cross beam positioned below the steel cross beam, the steel cross beam sections are assembled on the steel cross beam positioned below the steel cross beam sections through hoisting, the steel cross beam sections are integrally hoisted to the installation position to be installed and fixed, the hoisting difficulty is low, a temporary anchoring point is not required to be additionally arranged, the construction is convenient, and the construction process is greatly accelerated. The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims (10)

1. The self-climbing crane is suitable for a cable tower of a double-tower column type and is characterized by comprising a steel truss, a hydraulic jack lifting system and a winch lifting system, wherein the steel truss extends along a transverse bridge direction and is erected at the tops of two tower columns under construction, an opening is formed in one end, located in the length direction, of the steel truss, the hydraulic jack lifting system is arranged on the steel truss and is located between the two tower columns so as to lift a bridge construction member along the vertical direction, two sets of hydraulic jack lifting systems are arranged on the steel truss, one set of winch lifting system is arranged on the steel truss, and the winch lifting system can move along the longitudinal direction of the steel truss so as to be used for transporting the lifted bridge construction member along the transverse bridge direction.

2. The self-climbing crane according to claim 1, wherein the end side of the steel truss installation opening extends outside the tower and obliquely downward toward the tower.

3. The self-climbing crane according to claim 1, wherein the winch lifting system comprises a winch lifting bracket, a winch and a wire rope, the winch is mounted on the winch lifting bracket, the wire rope is connected with the winch to be retracted and extended by the winch, and the winch lifting bracket can move in the longitudinal direction of the steel truss.

4. The self-climbing crane according to claim 3, wherein the top of the steel truss is provided with a guide rail extending along the longitudinal direction of the steel truss, and the bottom of the hoisting support of the winch is provided with a running gear matched with the guide rail.

5. The self-climbing crane according to claim 4, wherein two sets of the steel wire ropes are arranged on the hoisting bracket of the winch, and a lifting appliance is arranged at the end part of the steel wire rope far away from the winch.

6. The self-climbing crane according to claim 5, wherein the spreader comprises a spreader main body, a carrying pole beam and lifting lugs, the steel wire rope is connected with the spreader main body, the spreader main body is hinged with the middle part of the upper side of the carrying pole beam, the lifting lugs are arranged at two ends of the lower side of the carrying pole beam and are used for being connected with a bridge construction member, and a gradient adjusting cylinder is further arranged between the spreader main body and the carrying pole beam.

7. The self-climbing crane according to claim 1, wherein the hydraulic jack lifting system comprises a hydraulic jack fixed to the steel truss and a steel strand passing through the middle of the hydraulic jack to lift the steel strand by the hydraulic jack.

8. The self-climbing crane according to claim 1, wherein the hydraulic jack-up system comprises two sets of hydraulic jacks and steel strands between two tower columns, and the two sets of steel strands are respectively used for connecting two ends of a bridge construction member.

9. The self-climbing crane according to claim 1, wherein two sets of self-climbing systems attached to two towers respectively are arranged at the bottom of the steel truss, each set of self-climbing system comprises an anchoring seat pre-embedded on a tower, a track attached to the anchoring seat, and a climbing assembly reversely hooked on the track, and the climbing assembly is fixed to the track through a pin.

10. The self-climbing crane according to claim 9, wherein the climbing assembly comprises a climbing frame, a climbing frame jacking seat, an oil cylinder seat and a jacking oil cylinder, the top end of the climbing frame is connected with the bottom of the steel truss, the climbing frame is fixedly connected with the climbing frame jacking seat, the jacking oil cylinder is connected between the climbing frame jacking seat and the oil cylinder seat, the rail is provided with a plugging pin hole, and the climbing frame jacking seat and the oil cylinder seat are respectively provided with a plugging pin mechanism which can stretch and retract to be plugged into the plugging pin hole.

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