CN112695641A - Bridge floor crane and front walking supporting mechanism thereof - Google Patents

Abstract

The application provides a bridge deck crane and a front walking support mechanism thereof, wherein the front walking constant support mechanism is arranged at the front end of a rear pressure rod of a support truss and comprises a front walking mechanism and a front support mechanism, the front walking mechanism comprises a walking track, a walking joint and a push-pull oil cylinder, the walking joint is fixed at the front end of the rear pressure rod, the walking track is also connected with the rear pressure rod and can slide relative to the rear pressure rod, the walking joint is matched with the walking track and can slide relative to the walking track, the push-pull oil cylinder is arranged between the walking joint and the walking track, a cylinder barrel of the push-pull oil cylinder is fixed with the walking track, and the extending end of a piston rod of the push-pull oil cylinder is; the front support mechanism comprises a support oil cylinder. The self-walking of the bridge floor crane is realized through the cooperation of the front walking mechanism and the front supporting mechanism, the self-walking is not required to be disassembled and assembled again, the structure is convenient, the front supporting mechanism is utilized to support in the hoisting box girder, the sliding of the bridge floor crane is avoided, and the stability of the hoisting process is improved.

Description

Bridge floor crane and front walking supporting mechanism thereof

Technical Field

The application relates to the technical field of cranes, in particular to a bridge deck crane and a front walking supporting mechanism thereof.

Background

At present, the bridge deck crane walking at home and abroad generally adopts a track and oil cylinder matched walking type walking mode, a full-length track is adopted for the bridge deck crane hoisted by a winch, and a track which is segmented from front to back is adopted for the bridge deck crane hoisted by hydraulic pressure. The through long track has large structure size, heavy self weight, large frictional resistance, slow walking speed and difficult installation and disassembly of the middle part of the track; the sectional type rail without the hydraulic cylinder drive needs to be manually moved when the rail is in place during walking, so that the walking efficiency is low, and the labor intensity is high.

Therefore, it is necessary to develop a bridge crane with simple structure and convenient walking.

Disclosure of Invention

The main objective of this application aims at providing a high preceding walking supporting mechanism of stability.

Another object of the present application is to provide a bridge deck crane comprising the above-mentioned front walking support mechanism.

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

as a first aspect, the application relates to a front walking support mechanism, which is arranged at the front end of a rear pressure rod of a support truss and comprises a front walking mechanism and a front support mechanism,

the front walking mechanism comprises a walking track, a walking joint and a push-pull oil cylinder, the walking joint is fixed at the front end of the rear pressing rod, the walking track is also connected with the rear pressing rod and can slide relative to the rear pressing rod, the walking joint is matched with the walking track, the walking joint can slide relative to the walking track, the push-pull oil cylinder is arranged between the walking joint and the walking track, a cylinder barrel of the push-pull oil cylinder is fixed with the walking track, and the extending end of a piston rod of the push-pull oil cylinder is connected with the walking joint;

the front supporting mechanism comprises a supporting oil cylinder which is used for jacking the front end of the rear pressure rod so as to enable the walking track to be separated from the bridge floor.

Further setting: the rear end of the walking track is provided with a guide block matched with a guide groove formed in the rear pressure lever, and the guide block is hinged with the walking track.

Further setting: the traveling rail is provided with a counter-force seat for mounting the cylinder barrel of the push-pull oil cylinder, and the traveling rail is provided with a mounting hole for a bolt to penetrate so as to mount and fix the counter-force seat.

Further setting: and a plurality of groups of mounting holes are arranged along the length direction of the walking track.

Further setting: the bottom of the walking track is connected with a sliding shoe through a screw.

Further setting: the cylinder barrel of the supporting oil cylinder is fixed with the rear pressing rod, the piston rod of the supporting oil cylinder extends out of the cylinder barrel downwards, and the extending end of the piston rod of the supporting oil cylinder is provided with a supporting seat.

Further setting: the supporting oil cylinders are respectively arranged on two sides of the supporting truss in two groups, and the two groups of supporting oil cylinders are connected through supporting oil cylinder connecting plates fixed on the rear pressure rod.

Further setting: and a plurality of supporting oil cylinders are arranged in each group along the length direction of the rear pressing rod, and the cylinder barrels of the supporting oil cylinders are connected through a connecting beam.

As the second aspect, the application relates to a bridge floor loop wheel machine, including the braced truss, the braced truss includes bearing girder, stand, bracing, back depression bar and back pull rod, the front end of back pull rod is equipped with as above preceding running support mechanism, the rear end of back pull rod is equipped with back running gear.

Further setting: the rear walking mechanism comprises walking support legs arranged at the rear ends of the rear pressure rods and walking wheels arranged at the bottoms of the walking support legs.

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

1. in the preceding walking supporting mechanism of this application, can realize the self-walking of bridge floor crane through preceding walking mechanism and preceding supporting mechanism's cooperation, simple structure, construction convenience to set up the track spout that has the guide effect, more conveniently control the antedisplacement of bridge floor crane, and utilize preceding supporting mechanism to support at the in-process of hoist and mount case roof beam, avoid the bridge floor crane to slide on its walking track, improved the stability of hoist and mount process.

2. In the front walking supporting mechanism of the application, the mounting holes for mounting and fixing the counter-force seats are formed in the walking track through the multiple groups of cylinder barrels for mounting the push-pull oil cylinders, so that the positions of the counter-force seats can be adjusted according to actual construction needs to adapt to the mounting of the oil cylinders with different strokes.

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 structural view of one embodiment of a deck crane of the present application;

FIG. 2 is an elevational view of the deck crane of the present application in the transverse direction;

FIG. 3 is a schematic view of a bridge deck crane of the present application illustrating a lifting mechanism;

FIG. 4 is a schematic view of a deck crane of the present application illustrating the underside of the spreader;

FIG. 5 is a schematic structural view of an upper platform in the bridge deck crane of the present application;

FIG. 6 is a schematic structural view of a lower platform of the deck crane of the present application;

FIG. 7 is a schematic view of the front travel mechanism in the deck crane of the present application;

FIG. 8 is a schematic view of a rear traveling mechanism in the bridge deck crane of the present application;

FIG. 9 is a schematic view of the rear anchor mechanism and the counterweight of the deck crane of the present application.

In the figure, 1, a support truss; 11. a load-bearing main beam; 12. a column; 13. bracing; 14. a rear pressure lever; 141. a first section; 1411. a guide groove; 142. a standard section; 143. a tail section; 15. a rear pull rod; 16. an anti-tipping rod; 17. a stay bar; 171. a stay bar joint ear plate; 18. a cross beam; 2. a lifting mechanism; 21. a steel strand assembly; 211. a steel strand reel; 212. steel strand wires; 213. a steel strand guide frame; 22. lifting the oil cylinder; 23. a spreader; 231. a shoulder pole beam; 232. lifting the lifting lug; 233. connecting the cross beam; 234. an anchor head fixing assembly; 2351. feeding an oil cylinder; 2352. a lower oil cylinder; 31. a front travel mechanism; 311. a traveling rail; 3111. a guide block; 3112. mounting holes; 3113. a slipper; 312. a walking joint; 313. a push-pull oil cylinder; 314. a counter-force seat; 32. a rear traveling mechanism; 321. a walking leg; 322. a traveling wheel; 4. lifting the platform; 41. an upper platform; 411. a first bracket; 412. a second bracket; 4121. an oil cylinder base plate; 413. a third support; 414. a chute; 42. a lower platform; 43. a connecting plate; 44. a first jack; 45. a second jack; 46. a stainless steel plate; 5. a front support mechanism; 51. a support cylinder; 52. a supporting seat; 53. supporting the oil cylinder connecting plate; 54. a connecting beam; 6. a rear anchor mechanism; 61. a pull-down member; 611. an eye plate; 612. a connecting shaft; 62. connecting a screw rod; 63. a nut; 64. connecting the conversion structure; 65. lifting lugs; 7. a counterweight portion; 71. a counterweight bracket; 72. and a balancing weight.

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.

Please combine fig. 1 to 9, the application relates to a bridge deck crane, including supporting truss 1, hoist mechanism 2 and running gear locate respectively the top and the bottom of supporting truss 1, wherein, hoist mechanism 2 is used for lifting by crane the steel box girder, running gear is used for realizing the self-walking of bridge deck crane, the bridge deck crane adopts truss structure as main support, can strengthen the stability and the load-carrying capacity of bridge deck crane, simple structure, convenient operation has greatly improved the hoist and mount efficiency of steel box girder.

Referring to fig. 1 and 2, the support truss 1 is supported by Q345 steel, and includes a main bearing beam 11, an upright 12, an inclined strut 13, a rear compression bar 14 and a rear tension bar 15, and the steel is connected by 10.9-grade bolts and locking nuts 63, so that the prefabricated steel can be transported to a construction site for assembly, and the construction efficiency is improved. Specifically, the main bearing beam 11 is located above the rear compression bar 14 and arranged in parallel with the rear compression bar 14, the upright 12 is vertically connected between the main bearing beam 11 and the rear compression bar 14, the top of the upright 12 is specifically connected with the rear end of the bearing beam, and the bottom of the upright 12 is connected with the front end of the rear compression bar 14. The inclined strut 13 is obliquely connected with the front end of the main bearing beam 11 and the bottom of the upright post 12 to form a first triangular truss; the rear pull rod 15 is obliquely connected with the top of the upright post 12 and the rear end of the rear pressure lever 14 to form a second triangular truss; the directions of the first triangular truss and the second triangular truss are opposite, and the orthographic projections of the first triangular truss and the second triangular truss are not overlapped. In addition, the first triangular truss and the second triangular truss are arranged in two groups side by side along the transverse bridge direction, and the two groups of trusses are connected through the cross beam 18, so that the support truss 1 is arranged in a trapezoidal or approximately parallelogram structure.

It should be noted that, in the support truss 1 of the present embodiment, one side of each rod member near the lifting operation of the bridge deck crane is defined as a front end, and the other end is a rear end.

Further, back depression bar 14 includes first festival 141, standard festival 142 and end section 143, first festival 141 is located the front end of back depression bar 14, end section 143 is located the rear end of back depression bar 14, standard festival 142 is located between first festival 141 and end section 143, and standard festival 142 can set up the multisection according to actual construction needs to be suitable for different job sites, and back depression bar 14 can split into the multisection and transport, and the transportation is convenient, has reduced the cost of transportation. And, the junction of each pole section of the back pressure lever 14 sets up the flange plate, and the bolt is matched with through the flange plate between each pole section and connects fixedly.

In addition, the inclined strut 13 and the upright post 12 are connected with the front end of the first section 141 through an upper hinge, and an anti-turnover rod 16 connected with the rear end of the first section 141 is arranged in the middle of the upright post 12, so that the connection stability of the upright post 12 and the rear pressure rod 14 is improved. Meanwhile, the middle parts of the bearing main beams 11, the inclined struts 13 and the upright columns 12 are respectively provided with a stay bar joint ear plate 171, and stay bars 17 are connected between the bearing main beams 11 and the inclined struts 13, between the bearing main beams 11 and the upright columns 12 and between the inclined struts 13 and the upright columns 12 through the stay bar joint ear plates 171, so that the structural stability of the support truss 1 is improved, and the structural stability of the bridge deck crane during hoisting the box girder is improved.

The two support trusses 1 of this embodiment are arranged side by side, and two lateral connection joints are arranged on the bearing main beam 11, the upright post 12, the inclined strut 13, the rear pressure rod 14 and the rear pull rod 15 of the support truss 1, so that the beam 18 is arranged between the two support trusses 1 through the beam connection joints, and the bearing capacity of the support truss 1 is improved.

Referring to fig. 1, 3 and 4, the lifting mechanism 2 is disposed on the main bearing beam 11, and includes a steel strand assembly 21, a lifting cylinder 22 and a lifting tool 23, the steel strand assembly 21 includes a steel strand 212 and a steel strand drum 211 for winding the steel strand 212, an end of the steel strand 212 is connected to the lifting tool 23, and the lifting cylinder 22 is connected to the steel strand 212, so as to drive the lifting tool 23 and a box girder lifted by the lifting tool to ascend together while lifting a steel frame line. And a steel strand guide frame 213 is arranged between the steel strand reel 211 and the lifting oil cylinder 22, and the steel strand guide frame 213 can be used for adjusting the position of the steel strand 212, so that the steel strand 212 is led into the lifting oil cylinder 22 from the steel strand reel 211 through the steel strand guide frame 213, and the normal use of the steel strand 212 is ensured.

The spreader 23 of the present embodiment includes two carrying pole beams 231, the two carrying pole beams 231 are connected by connecting beams 233, and the connecting beams 233 are respectively provided at both ends of the carrying pole beams 231 to ensure stability in connection of the two carrying pole beams 231. Lifting lugs 232 sleeved outside the two shoulder pole beams 231 are further arranged on the two shoulder pole beams 231, the lifting lugs 232 are connected with the steel strands 212, and a bridge deck leveling assembly and an anchor head fixing assembly 234 are arranged between the shoulder pole beams 231 and the lifting lugs 232. The bridge deck leveling component comprises an upper oil cylinder 2351 and a lower oil cylinder 2352 which are respectively arranged on the upper side and the lower side of the carrying pole beam 231, the cylinder barrels of the upper oil cylinder 2351 and the lower oil cylinder 2352 are respectively hinged with the carrying pole beam 231, and the extending ends of the piston rods of the upper oil cylinder 2351 and the lower oil cylinder 2352 are also respectively hinged with the upper end and the lower end of the lifting lug 232. The anchor head fixing assembly 234 includes a screw rod extending along the length direction of the carrying pole beam 231, and locking seats are respectively provided on the carrying pole beam 231 and the lifting lug 232, both ends of the screw rod respectively penetrate into the locking seats of the carrying pole beam 231 and the lifting lug 232, and both ends of the screw rod are respectively provided with a locking nut to lock the screw rod, so that the relative positions of the lifting lug 232 and the carrying pole beam 231 are fixed.

Further, four sets of the anchor head fixing assemblies 234 are provided on the two shoulder pole beams 231 and the lifting lugs 232, two sets of the anchor head fixing assemblies 234 are provided on the left and right sides of the lifting lugs 232 in the thickness direction, respectively, and the two sets of the anchor head fixing assemblies 234 on the single side of the lifting lugs 65 are provided on the two end sides of the lifting lugs 232 in the length direction of the shoulder pole beams 231, respectively.

Therefore, the lifting lug 65 of the application adopts the bridge deck leveling component to change the position of the lifting lug 232 above the gravity center of the lifted box girder, and the lifting lug 232 can keep a state perpendicular to the position above the gravity center of the box girder at any time, so that the longitudinal gradient of the box girder can be changed, and the lifting position of the box girder is ensured to meet the construction requirements. Meanwhile, after the position of the lifting lug 232 is adjusted, the lifting lug 232 is locked through the anchor head fixing assembly 234, and the installation quality of the lifting lug 232 is ensured.

In addition, referring to fig. 3, 5 and 6, a lifting platform 4 is disposed between the lifting mechanism 2 and the main bearing beam 11, so that the lifting mechanism 2 can move relative to the main bearing beam 11, and the position of the lifted box girder can be adjusted.

The lifting platform 4 comprises an upper platform 41 and a lower platform 42, wherein the upper platform 41 is formed by welding a first support 411, a second support 412 and a third support 413, the first support 411 and the second support 412 are located at the same height, the first support 411 is located at the rear end of the upper platform 41, the first support 411 is located at the front end of the upper platform 41, and the third support 413 extends in the vertical direction and is welded on the second support 412. The lifting mechanism 2 is disposed on the upper platform 41, specifically, an oil cylinder steel plate is disposed on the second support 412 of the upper platform 41, so that the lifting oil cylinder 22 is installed and fixed, and the steel strand guide frame 213 is installed on the third support 413. And a first jack 44 is arranged on the main bearing beam 11, and the first jack 44 is used for pushing the lower platform 41 to translate along a first direction. Specifically, the cylinder of the first jack 44 is fixed on the main bearing beam, the extending end of the piston rod of the first jack is connected to the lower platform 42, and the piston rod of the first jack can extend and retract along the length direction of the main bearing beam 11, that is, the first direction is the length direction of the main bearing beam 11, and then the first jack 44 can push the lifting platform 4 to drive the lifting mechanism 2 to move along the length direction of the main bearing beam 11.

In addition, the rear ends of the upper platform 41 and the lower platform 42 are both provided with a connecting plate 43, a pin shaft penetrates through the connecting plate 43 between the upper platform and the lower platform, a second jack is arranged between the upper platform and the lower platform, a cylinder barrel of the second jack 45 is fixed with the lower platform, a piston rod extending end of the second jack 45 is connected with the upper platform 41, a sliding groove 414 extending along the length direction of the upper platform 41 is arranged at the connecting position of the piston rod extending end of the second jack 45 and the upper platform 41, and a sliding block sliding in the sliding groove 414 is hinged to the piston rod extending end of the second jack 45. Therefore, the upper platform 41 is pushed to rotate around the pin shaft in a second direction relative to the lower platform 42 by the second jack 45, the second direction is the axial direction of the pin shaft, so that the position fine adjustment of the hoisting structure on the upper platform is realized, and after the position adjustment of the upper platform 41 is finished, the upper platform 41 and the lower platform 42 can be locked by locking the pin shaft at the front end.

Further, the upper surface of the lower platform 42 is located in the rotation range area of the upper platform 41 and is disposed on a stainless steel plate 46, and correspondingly, the lower surface of the upper platform 41 is also disposed on the stainless steel plate 46, so that friction between the upper platform 41 and the lower platform 42 can be reduced, and abrasion of the lifting platform 4 caused by the rotation of the upper platform 41 relative to the lower platform 42 can be reduced. Preferably, the thickness of the stainless steel plate 46 of the upper platform 41 and the lower platform 42 is 5 mm.

In addition, the upper platform 41 and the lower platform 42 are both provided with a hollow structure (not shown), the hollow structure is disposed at a non-bearing position of the upper platform 41 and the lower platform 42 to reduce the weight of the upper platform 41 and the lower platform 42, so that the first jack 44 can push the lifting platform 4 to adjust the position of the lifting mechanism 2 along the direction along the bridge direction, and the hollow structure can also reduce the contact area between the upper platform 41 and the lower platform 42 to further reduce the friction between the upper platform 41 and the lower platform 42, so that the second jack 45 can push the upper platform 41 to rotate around a pin shaft relative to the lower platform 42.

Therefore, the lifting platform 4 is arranged between the main bearing beam 11 and the lifting mechanism 2, so that the lifting mechanism 2 can relatively support the truss 1 to move along the direction of the bridge, and then the position of the box girder can be lifted up to meet the requirement of box girder assembly.

Referring to fig. 2 and 7, the traveling mechanism is disposed at the bottom of the rear pressing rod 14, a front supporting mechanism 5 supported on the bridge deck is disposed at the front end of the rear pressing rod 14 close to the upright 12, and a rear anchoring mechanism 6 fixed to the bridge deck is disposed at the rear end of the rear pressing rod 14.

Specifically, the traveling mechanism includes a front traveling mechanism 31 and a rear traveling mechanism 32, the front traveling mechanism 31 is disposed at the front end of the rear pressure lever 14, and the front traveling mechanism 31 and the front support mechanism 5 are collectively referred to as a front support traveling mechanism. The front traveling mechanism 31 comprises a traveling rail 311, a traveling joint 312 and a push-pull cylinder 313, the traveling structure is fixedly connected with the front end of the head section 141 of the rear pressing rod 14, the traveling rail 311 is connected with the tail end of the head section 141 of the rear pressing rod 14, the traveling joint 312 is matched with the traveling rail 311, the traveling joint 312 can slide relative to the traveling rail 311, the head section 141 of the rear pressing rod 14 is provided with a guide groove 1411 extending along the length direction of the head section 141, the rear end of the traveling rail 311 is provided with a guide block 3111 matched with the guide groove 1411, and the guide block 3111 is hinged to the traveling rail 311. The push-pull oil cylinder 313 is arranged between the walking joint 312 and the walking track 311, the cylinder barrel of the push-pull oil cylinder 313 is fixed with the walking track 311, and the extending end of the piston rod is connected with the walking joint 312.

Furthermore, the traveling rail 311 is provided with a reaction seat 314 for mounting the cylinder barrel of the push-pull oil cylinder 313, and the traveling rail 311 is provided with a mounting hole 3112 for inserting a bolt into the reaction seat 314 for mounting and fixing, so that the assembly and disassembly are convenient, and the turnover use is convenient. In order to adapt to oil cylinders with different strokes, the mounting holes 3112 are provided with a plurality of groups along the length direction of the traveling rail 311, so as to adjust the position of the reaction seat 314 according to actual construction requirements.

In addition, a sliding shoe 3113 is connected to the bottom of the traveling rail 311 through a screw, so that the traveling rail 311 can move conveniently, and the sliding shoe 3113 is detachably connected to the traveling rail 311, so that the traveling rail 311 can be replaced after the sliding shoe 3113 is worn due to time use, thereby protecting the traveling rail 311.

The front supporting mechanism 5 comprises a supporting oil cylinder 51, a cylinder barrel of the supporting oil cylinder 51 is connected with the rear pressing rod 14, and a supporting seat 52 is connected to the extending end of a piston rod of the supporting oil cylinder 51, so that the action area of the end part of the piston rod is increased, the front end of the rear pressing rod 14 is conveniently jacked, and the stability of the jacking process is improved.

Preferably, the number of the supporting trusses 1 of this embodiment is two, correspondingly, the traveling mechanism is provided with two sets of supporting rods 14 corresponding to two back pressure rods respectively, and simultaneously, the supporting oil cylinders 51 are provided with two sets of supporting trusses 1 on both sides, and two sets of supporting oil cylinders 51 are connected through the supporting oil cylinder connecting plate 53, and the supporting oil cylinder 51 connecting plate 43 is fixed with the first section 141 of the back pressure rod 14. Furthermore, each group of the support cylinders 51 is provided with a plurality of support cylinders 51 along the length direction of the rear pressing rod, and the support cylinders 51 are connected through a connecting beam 54. Specifically, bolts may be passed through the support cylinder connection plate 53 and the connection beam 54 to connect the support cylinders 51, which in turn ensures the integral connection of the support cylinders 51.

Referring to fig. 8, the rear traveling mechanism 32 is disposed at the rear end of the rear compression bar 14, and specifically includes a traveling leg 321 disposed at the rear end of the tail section 143 of the rear compression bar 14 and a traveling wheel 322 disposed at the bottom of the traveling leg 321, so that when the front traveling mechanism 31 pushes the support truss 1 to move forward, the rear end of the support truss 1 can be supported to facilitate the movement of the bridge deck crane.

Referring to fig. 9, the rear anchor mechanism 6 includes a pull-down part 61 disposed on the tail section 143 of the rear pressing rod 14, the pull-down part 61 is connected to the tail section 143 through a connecting screw 62, and a locking nut 63 is sleeved on the connecting screw 62 to lock the connecting screw 62 to the tail section 143 of the rear pressing rod 14. The connecting screw 62 is connected with the lower pull piece 61 through a connection conversion structure 64, so that the connecting screw 62 can rotate relative to the lower pull rod but does not move along the axial direction of the connecting screw 62.

The pull-down part 61 comprises two eye plates 611 arranged in parallel, two reinforcing circular rings are arranged at two ends of each eye plate, and a connecting shaft 612 for connecting the two eye plates is arranged between the reinforcing circular rings at the tops of the two eye plates 611 in a penetrating mode so as to ensure the structural stability of the pull-down part 61. The reinforcing ring at the bottom of the eye plate 611 is connected and fixed with the lifting lug 65 welded on the bridge deck plate through a pin bolt, so that the rear anchoring of the bridge deck crane is realized. The rear anchorage 6 in this embodiment preferably comprises two sets of drop links and lifting lugs 65.

In addition, the adjusting range of the rear anchor mechanism is 2390-4500 mm, and meanwhile the height of the pull-down piece 61 can be adjusted through the connecting screw rod 62 so as to adapt to different construction scenes.

The rear section 143 of the rear pressure lever 14 is also provided with a counterweight part 7, the counterweight part 7 comprises a counterweight support 71 extending along the length direction of the rear pressure lever 14, a counterweight block 72 is placed on the counterweight support 71, and the counterweight block 72 and the counterweight support 71 are relatively independent, so that the number of the counterweight blocks 72 can be changed according to actual construction requirements, and the stability of the bridge deck crane in the process of hoisting the box girder can be ensured.

In conclusion, the bridge crane can be assembled in a trial mode and operated and debugged in a factory after being machined, can be disassembled and transported to a construction site after experience folding grids, a 50t truck crane is adopted for assembling the support truss 1 of the bridge crane on the site, a 150t floating crane is adopted for integrally hoisting the support truss to the bridge floor after the support truss is assembled near a main pier, and other accessories and a hoisting system are also adopted for hoisting the support truss to the bridge floor by the 150t floating crane for assembling.

The installation method of the bridge deck crane specifically comprises the following steps:

(1) and assembling the support truss 1 of the bridge deck crane by adopting a 50t truck crane in the open space near the main pier of the main bridge. When the supporting truss 1 is assembled, the single-side truss needs rods to be assembled in a scattered manner, and the single-side supporting truss 1 can be considered to be assembled into two blocks on a construction platform in advance and then combined after turning over. After the assembly is finished, the side part is temporarily fixed, and after the support truss 1 on the other side is also assembled, the transverse connection is carried out through the cross beam 18 so as to connect the support trusses 1 on the left side and the right side into a whole.

(2) Before the bridge deck crane is used for lifting integrally, a front pivot and a rear pivot and an anchoring system are installed on the bridge deck by adopting a 50t truck crane according to a crane construction drawing, wherein the anchoring system is a lifting lug 65 which is connected with the rear anchoring mechanism 6 and welded with the bridge deck, and the transverse distance between the front pivot and the rear pivot and the transverse distance between the front pivot and the anchoring system must be measured and released to ensure the accuracy of the relative position.

(3) And lifting the assembled bridge deck crane support truss 1 to the bridge deck by adopting a 150t floating crane, and lifting the rest lifting systems to the support truss 1 by adopting a 150t floating crane or a 50t truck crane for assembling.

The bridge floor loop wheel machine of this application is when using, is guaranteeing bridge floor loop wheel machine's back anchor mechanism 6 and decking and is connected fixed back, transfers hoist 23 and make the box girder be connected fixedly with hoist 23, and pass through the focus of hoist 23 is adjusted to bridge floor leveling subassembly on hoist 23 to ensure the steady of hoist 23 lift process. Meanwhile, the position of the lifting mechanism 2 can be adjusted through the lifting platform 4 to achieve the purpose of adjusting the position of the box girder, the first jack 44 can be used for adjusting the position of the lifting mechanism 2 along the bridge direction, and the second jack 45 can be used for finely adjusting the angles of the lifting mechanism 2 and the box girder, so that the lifting box girder is matched with the closure construction position. And then, lifting the steel strand 212 by using the lifting oil cylinder 22 so as to hoist the lifting appliance 23 and the box girder to the closure position of the box girder segment, so as to perform subsequent box girder closure construction. After the construction of the box girder is finished, the limitation of the rear anchor mechanism 6 of the bridge deck crane can be removed, and the integral movement of the bridge deck crane is driven by the front walking support mechanism.

Specifically, the supporting cylinder 51 is contracted, so that the traveling rail 311 is placed on the bridge deck, and at this time, the telescopic rod of the push-pull cylinder 313 extends outwards to push the traveling joint 312 to slide on the traveling rail 311, so as to achieve the purpose of pushing the bridge deck crane to move forwards. When the telescopic rod of the push-pull oil cylinder 313 reaches the maximum stroke, the telescopic cylinder of the support oil cylinder 51 extends out to jack up the front end of the rear pressure rod 14, so that the walking track 311 is separated from the bridge deck, then the telescopic rod of the push-pull oil cylinder 313 retracts into the cylinder barrel, and then the steps are repeated, so that the bridge deck crane gradually moves to a newly assembled box girder to carry out the lifting operation of the next box girder.

The bridge floor loop wheel machine of this application adopts truss structure as main bearing structure, has good structural stability, can strengthen bridge floor loop wheel machine's stability and bearing capacity, simple structure, and construction convenience improves the efficiency and the construction safety nature of the operation of lifting by crane of case roof beam then.

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. A front walking support mechanism is arranged at the front end of a rear pressure rod of a support truss and is characterized by comprising a front walking mechanism and a front support mechanism,

the front walking mechanism comprises a walking track, a walking joint and a push-pull oil cylinder, the walking joint is fixed at the front end of the rear pressing rod, the walking track is also connected with the rear pressing rod and can slide relative to the rear pressing rod, the walking joint is matched with the walking track, the walking joint can slide relative to the walking track, the push-pull oil cylinder is arranged between the walking joint and the walking track, a cylinder barrel of the push-pull oil cylinder is fixed with the walking track, and the extending end of a piston rod of the push-pull oil cylinder is connected with the walking joint;

the front supporting mechanism comprises a supporting oil cylinder which is used for jacking the front end of the rear pressure rod so as to enable the walking track to be separated from the bridge floor.

2. The front walking support mechanism according to claim 1, wherein a guide block matched with a guide groove formed on the rear pressure lever is arranged at the rear end of the walking rail, and the guide block is hinged to the walking rail.

3. The front walking support mechanism according to claim 1, wherein the walking rail is provided with a reaction seat for mounting a cylinder barrel of the push-pull cylinder, and the walking rail is provided with a mounting hole for a bolt to pass through to mount and fix the reaction seat.

4. The front walking support mechanism of claim 3, wherein the mounting holes are provided in a plurality of groups along a length direction of the walking rail.

5. The front walking support mechanism of claim 1, wherein a skid shoe is attached to the bottom of the walking rail by a screw.

6. The front walking support mechanism according to claim 1, wherein the cylinder barrel of the support cylinder is fixed to the rear press rod, the piston rod of the support cylinder extends downward out of the cylinder barrel, and the extending end of the piston rod of the support cylinder is provided with a support seat.

7. The front walking support mechanism according to claim 6, wherein two sets of the support cylinders are respectively located at two sides of the support truss, and the two sets of the support cylinders are connected through a support cylinder connection plate fixed on the rear pressure bar.

8. The front walking support mechanism according to claim 7, wherein a plurality of support cylinders are provided in each group along the length direction of the rear pressing rod, and the cylinder barrels of the plurality of support cylinders are connected by a connecting beam.

9. A bridge deck crane, comprising a support truss, characterized in that the support truss comprises a bearing main beam, a column, a diagonal brace, a rear pressure bar and a rear pull rod, the front end of the rear pull rod is provided with a front walking support mechanism according to any one of claims 1-8, and the rear end of the rear pull rod is provided with a rear walking mechanism.

10. The bridge deck crane according to claim 9, wherein said rear traveling mechanism comprises a traveling leg provided at a rear end of the rear strut and a traveling wheel provided at a bottom of the traveling leg.

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