CN110528379B

CN110528379B - Steel strand protection structure for large-span beam

Info

Publication number: CN110528379B
Application number: CN201910797111.2A
Authority: CN
Inventors: 邓流沙; 谢军邦; 张驰
Original assignee: Shenzhen Shenan Enterprise Co ltd
Current assignee: Shenzhen Shenan Enterprise Co ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2021-07-13
Anticipated expiration: 2039-08-27
Also published as: CN110528379A

Abstract

The invention discloses a steel strand protection structure for a large-span beam, which relates to the technical field of main beams, and adopts the technical scheme that the steel strand protection structure comprises bridge piers and main beams, wherein a plurality of support frames are arranged between the bridge piers, protection devices are arranged between two sides of each support frame and the main beams, and each group of protection devices comprises a plurality of through holes, a plurality of steel strands and a tightening mechanism; the tightening mechanism comprises a mounting groove, a horizontal shaft and two driving motors; two ends of the horizontal shaft are respectively detachably connected to output shafts of the two driving motors; two ends of each steel strand are respectively provided with a connecting plate, and a plurality of groups of first driving assemblies are arranged in the mounting grooves; each group of first driving assemblies comprises a first lead screw, a holding part, a worm and a worm wheel; the first lead screw is in threaded connection with the connecting plate. The protection device is arranged, so that a certain protection effect can be achieved on the main beam, and the service life of the main beam can be prolonged.

Description

Steel strand protection structure for large-span beam

Technical Field

The invention relates to the technical field of main beams, in particular to a steel strand protection structure for a large-span beam.

Background

The main beam is generally a structure that is erected on rivers, lakes and seas to allow vehicles, pedestrians and the like to smoothly pass through. In order to adapt to the modern high-speed developed traffic industry, the main beam is also extended to a building which spans mountain stream, unfavorable geology or meets other traffic requirements and is erected to enable the traffic to be more convenient. The main beam generally consists of an upper structure, a lower structure, a support and an auxiliary structure, wherein the upper structure is also called a bridge structure and is a main structure for crossing obstacles; the lower structure comprises a bridge abutment, a bridge pier and a foundation; the support is a force transmission device arranged at the supporting positions of the bridge span structure and the bridge pier or the bridge abutment; the auxiliary structures refer to bridge end butt straps, tapered revetments, diversion works and the like.

In the prior art, reference can be made to a Chinese patent application with an authorization publication number of CN110004819A, and the invention discloses a girder and pier fixed connection structure of a long-span girder and a construction method thereof, wherein the girder and pier fixed connection structure comprises a prefabricated girder and pier which are of steel structures and are connected together through bolts; the welding of pier upper end has lower flange dish, the girder downside is provided with the last ring flange that is located lower flange dish upside, set up on the girder with the hole of last ring flange upper bolt hole one-to-one, the bolt is locked by the nut that is located lower flange dish downside after down passing hole, upper flange dish and lower flange dish in proper order from top to bottom. According to the girder and pier fixed connection structure of the large-span girder, the bridge piers are connected into a whole through the flange plates and the bolts, the integrity and rigidity transition of the structure can be well realized, the girder and the bridge piers cannot have stress concentration phenomenon or bridge pier deviation and other diseases in the using process, the connection between the girder and the bridge piers is strengthened, the bearing capacity of the girder and the bridge piers is improved, and the anti-seismic performance of the girder is enhanced.

However, since the protection device is not provided on the main beam, the main beam is easily deformed under long-term rolling of the vehicle, which may shorten the service life of the main beam.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a steel strand protection structure for a large-span beam, which can play a certain protection role on a main beam by arranging a protection device, so that the service life of the main beam can be prolonged.

In order to achieve the purpose, the invention provides the following technical scheme: a steel strand protection structure for a large-span beam comprises bridge piers and main beams, wherein a plurality of support frames for supporting the main beams are arranged between the bridge piers, protection devices are arranged between two sides of each support frame and the main beams, each protection device comprises a plurality of through holes which are sequentially arranged on one side of each support frame along the vertical direction, a plurality of steel strands which penetrate through the through holes in a one-to-one correspondence manner, and a tightening mechanism which is arranged on one side of each main beam and is used for tightening the steel strands; the tightening mechanism comprises a mounting groove, a horizontal shaft and two driving motors, wherein the mounting groove is formed in one side of the top of the main beam and is arranged along the length direction of the main beam; two ends of the horizontal shaft are respectively detachably connected to output shafts of the two driving motors; connecting plates are respectively arranged at two ends of each steel strand, and a plurality of groups of first driving assemblies which correspond to the connecting plates one by one and are used for driving the connecting plates to move vertically are arranged in the mounting grooves; each group of first driving assemblies comprises a first lead screw vertically and rotatably connected to the bottom of the mounting groove through a thrust bearing, a holding part fixedly connected to the top of the first lead screw, a worm detachably connected to a horizontal shaft through a bolt, and a worm wheel detachably connected to the first lead screw through a bolt and meshed with the worm; the first lead screw is in threaded connection with the connecting plate.

By adopting the technical scheme, the driving motor is started, the output shaft of the driving motor drives the horizontal shaft to rotate, the horizontal shaft rotates to drive the worm to rotate, the worm rotates to drive the worm gear to rotate, the worm gear rotates to drive the first lead screw to rotate, the first lead screw rotates to drive the connecting plate to move downwards, and the connecting plate moves downwards to tighten the steel strand; the prestressed steel strand tensioning is to apply a force opposite to the load action to the main beam before bearing the load, when the main beam bears the load action, the load firstly offsets the prestress, then the main beam bears the force, so that the bearing capacity of the main beam is increased, the main beam can be protected to a certain extent, and the service life of the main beam can be prolonged.

The invention is further configured to: a clamping mechanism for clamping the steel strand is installed in the installation groove corresponding to the connecting plate, and comprises a supporting plate fixedly connected to the bottom of the installation groove, a second lead screw which is rotatably connected to the top of the supporting plate and horizontally arranged, a left thread and a right thread which are respectively arranged at two ends of the second lead screw, two clamping plates which are respectively in threaded connection with the left thread and the right thread, and a second driving assembly which is arranged between the connecting plate and the supporting plate and used for driving the second lead screw to rotate; two the equal rigid coupling in bottom of splint has the slider, the spout that is used for supplying the slider to slide along the horizontal direction is seted up at the top of backup pad.

Through adopting above-mentioned technical scheme, rotate through second drive assembly drive second lead screw, two splint of second lead screw rotation drive move in opposite directions to alright further fix the steel strand wires, therefore can reduce the possibility that the pedestrian was wounded in the steel strand wires jump.

The invention is further configured to: the second driving assembly comprises a rack which is fixedly connected to one side of the connecting plate and is vertically arranged, and a gear which is detachably connected to the second lead screw through a bolt; the rack is meshed with the gear.

Through adopting above-mentioned technical scheme, the connecting plate moves down and drives the rack downstream, and rack downstream drives gear revolve, and gear revolve drive second lead screw rotates to need not operating personnel and additionally exert force, therefore can reduce operating personnel's intensity of labour.

The invention is further configured to: every the lag has been cup jointed respectively at the both ends of steel strand wires, the internal diameter of lag is greater than the external diameter of steel strand wires, the lag includes through the bolt rigid coupling in the fixed pipe of support frame one side and along the axial of fixed pipe slide connect in fixed pipe keep away from the movable tube of support frame one end, the movable tube is kept away from the one end of fixed pipe and is passed through the bolt fastening.

By adopting the technical scheme, the length of the protective sleeve is convenient to adjust by arranging the fixed pipe and the movable pipe, so that the protective sleeve is suitable for steel strands with different lengths; moreover, through setting up the lag, can reduce the steel strand wires and take place the possibility that the pedestrian is wounded that bounces after the fracture.

The invention is further configured to: the inside wall rigid coupling of activity pipe has the bar piece, the bar groove that is used for supplying the bar piece to slide along the axial of fixed pipe is seted up to the lateral wall of fixed pipe.

Through adopting above-mentioned technical scheme, the bar groove has the guide effect to the bar to can reduce the movable tube and take place the possibility of deviating at the axial of following fixed pipe in-process that slides.

The invention is further configured to: the two ends of each through hole are respectively provided with a tensioning assembly, each tensioning assembly comprises a fixed frame fixedly connected to one side of the support frame, a rotating shaft which is rotatably connected to the fixed frame and horizontally arranged, two torsion springs respectively sleeved at the two ends of the rotating shaft, a connecting arm which is fixedly connected to the rotating shaft and obliquely arranged, and a guide wheel fixedly connected to one end, far away from the rotating shaft, of the connecting arm; the opposite ends of the two torsion springs are fixedly connected to the two sides of the connecting arm respectively, and the ends far away from each other of the two torsion springs are fixedly connected to the two opposite inner sides of the fixing frame respectively.

By adopting the technical scheme, when the steel strand is installed, the steel strand enables the rotating shaft to rotate, the rotating shaft rotates to compress the torsion spring, and the torsion spring is in a compressed state; after the steel strand becomes loose after being used for a period of time, the steel strand can be tightened under the action of the torsion spring, so that the steel strand can protect the main beam conveniently.

The invention is further configured to: the output shaft of the driving motor is provided with a connecting mechanism for connecting a horizontal shaft, and the connecting mechanism comprises a yielding groove arranged on the end surface of the output shaft of the driving motor, which is close to one end of the horizontal shaft, a connecting block connected to the yielding groove in a sliding manner along the axial direction of the horizontal shaft, a square groove arranged on one end of the connecting block, which is close to the horizontal shaft, a square block fixedly connected to one end of the horizontal shaft, which is close to the connecting block, and inserted into the square groove, and a fixing component arranged on the connecting block and used for; the outer side wall of the connecting block is fixedly connected with a T-shaped block, and a T-shaped groove used for allowing the T-shaped block to slide along the axial direction of the horizontal shaft is formed in the inner side wall of the abdicating groove.

Through adopting above-mentioned technical scheme, when needs drive horizontal axis rotates, make square piece and square groove peg graft through removing the connecting block, then fix square piece through fixed subassembly to be convenient for driving motor's output shaft drive horizontal axis rotates, moreover, when not needing the horizontal axis to rotate, can make driving motor's output shaft and horizontal axis separation, thereby can reduce driving motor and cause the possibility of incident because of unexpected the start-up.

The invention is further configured to: the fixing component comprises a bolt, a stop block, a spring and an inserting hole, the bolt is connected to the connecting block in a sliding mode along the radial direction of the horizontal shaft, the stop block is sleeved and fixed on the bolt, the spring is sleeved and connected with the bolt, and the inserting hole is formed in one side of the square block; one end of the plug pin penetrates through the connecting block and extends into the square groove to be inserted into the jack, and the other end of the plug pin is fixedly connected with a handle; the stop block is positioned between the handle and the connecting block, and two ends of the spring are fixedly connected to the connecting block and the stop block respectively.

By adopting the technical scheme, when the square block is required to be spliced with the square groove, the bolt is pulled by pulling the handle, then the connecting block can be moved to splice the square block with the square groove, and the bolt moves to drive the stop block to move, the stop block moves to stretch the spring, and the spring is in a stretched state; when the square block is inserted into the square groove, the handle is released, and the stop block drives the plug pin to be inserted into the jack under the action of the spring; when the square block is required to be separated from the square groove, the bolt is pulled by pulling the handle to separate the bolt from the jack, and then the connecting block is moved; to sum up, through setting up fixed subassembly, be convenient for make square piece and square groove peg graft, therefore can reduce operating personnel's intensity of labour.

The invention is further configured to: a plurality of protective covers are installed in proper order along its length direction at the top of mounting groove, a plurality of drain pipes are installed in proper order along its length direction in the bottom of mounting groove, the one end that the mounting groove was kept away from to the drain pipe runs through girder one side and sets up.

By adopting the technical scheme, the possibility of stepping empty by the pedestrian can be reduced by arranging the protective cover; through setting up the drain pipe, can in time discharge the rainwater in the mounting groove, therefore can reduce driving motor because of intaking the possibility of short circuit.

In summary, compared with the prior art, the invention has the following beneficial effects:

1. starting a driving motor, wherein an output shaft of the driving motor drives a horizontal shaft to rotate, the horizontal shaft rotates to drive a worm to rotate, the worm rotates to drive a worm wheel to rotate, the worm wheel rotates to drive a first lead screw to rotate, the first lead screw rotates to drive a connecting plate to move downwards, and the connecting plate moves downwards to tighten the steel strand; the prestressed steel strand tensioning is to apply a force opposite to the load action to the main beam before bearing the load, when the main beam bears the load, the load firstly counteracts the prestress, and then the main beam bears the force, so that the bearing capacity of the main beam is increased, the main beam can be protected to a certain extent, and the service life of the main beam can be prolonged;

2. the connecting plate moves downwards to drive the rack to move downwards, the rack moves downwards to drive the gear to rotate, and the gear rotates to drive the second lead screw to rotate, so that extra force does not need to be applied by an operator, and the labor intensity of the operator can be reduced;

3. when the steel strand is installed, the steel strand enables the rotating shaft to rotate, the rotating shaft rotates to compress the torsion spring, and the torsion spring is in a compressed state; after the steel strand becomes loose after being used for a period of time, the steel strand can be tightened under the action of the torsion spring, so that the steel strand can protect the main beam conveniently.

Drawings

FIG. 1 is a schematic view of the overall structure of the embodiment;

FIG. 2 is a schematic view showing the structure of the highlighting guard of the embodiment;

FIG. 3 is a schematic view showing the structure of the tightening mechanism in the embodiment;

FIG. 4 is a schematic structural view of a highlighted sleeve in an embodiment;

FIG. 5 is a schematic view of an embodiment of a protruding cover;

FIG. 6 is a schematic view showing the structure of the connection mechanism in the embodiment;

FIG. 7 is a schematic view showing the structure of the protective cover according to the embodiment;

fig. 8 is a partial enlarged view of a portion a in fig. 5.

In the figure: 10. a bridge pier; 11. a main beam; 12. a support frame; 2. a guard; 21. a through hole; 22. steel strand wires; 3. a tightening mechanism; 31. mounting grooves; 32. a horizontal axis; 33. a drive motor; 34. a connecting plate; 35. connecting lugs; 36. a sleeve; 37. a first drive assembly; 371. a first lead screw; 372. a grip portion; 373. a worm; 374. a worm gear; 4. a connecting mechanism; 41. a yielding groove; 411. a T-shaped slot; 42. connecting blocks; 421. a T-shaped block; 43. a square groove; 44. a square block; 45. a fixing assembly; 451. a bolt; 452. a stopper; 453. a spring; 454. a jack; 455. a handle; 5. a clamping mechanism; 51. a support plate; 511. a chute; 52. a second lead screw; 53. a left thread; 54. a right thread; 55. a splint; 551. a slider; 56. a second drive assembly; 561. a rack; 562. a gear; 6. a protective sleeve; 61. a fixed tube; 611. a strip-shaped groove; 612. a strut; 62. a movable tube; 621. a bar-shaped block; 7. a tension assembly; 71. a fixed mount; 72. a rotating shaft; 73. a torsion spring; 74. a connecting arm; 75. a guide wheel; 8. a protective cover; 9. and a water discharge pipe.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Example (b): a steel strand wires protective structure for large-span roof beam, as shown in fig. 1, includes pier 10 and girder 11, is provided with a plurality of support frames 12 that are used for supporting girder 11 between pier 10, all installs protector 2 between the both sides of every support frame 12 and girder 11.

As shown in fig. 1 and 2, each group of protection devices 2 includes a plurality of through holes 21 vertically and sequentially arranged on one side of the support frame 12, a plurality of steel strands 22 passing through the plurality of through holes 21 in a one-to-one correspondence manner, and a tightening mechanism 3 installed on one side of the main beam 11 for tightening the plurality of steel strands 22; as shown in fig. 3 and 4, the tightening mechanism 3 includes an installation groove 31 opened at one side of the top of the main beam 11 and arranged along the length direction of the main beam 11, a horizontal shaft 32 rotatably connected in the installation groove 31 and arranged along the length direction of the main beam 11, and two driving motors 33 respectively arranged at two ends of the horizontal shaft 32; the driving motor 33 can be an asynchronous motor or a positive and negative rotation motor; both ends of the horizontal shaft 32 are detachably connected to output shafts of two driving motors 33, respectively; the two ends of each steel strand 22 are respectively provided with a connecting plate 34, the top of each connecting plate 34 is in threaded connection with a connecting lug 35, one end of each steel strand 22 is connected with the connecting lug 35 through a sleeve 36, and when the steel strands 22 are fixedly connected with the connecting lugs 35, the sleeves 36 are deformed through locking pliers or other tools; a plurality of groups of first driving components 37 which are in one-to-one correspondence with the connecting plates 34 and are used for driving the connecting plates 34 to move vertically are arranged in the mounting groove 31; each set of the first driving assembly 37 includes a first lead screw 371 vertically and rotatably connected to the bottom of the mounting groove 31 through a thrust bearing, a holding part 372 fixedly connected to the top of the first lead screw 371, a worm 373 detachably connected to the horizontal shaft 32 through a bolt, and a worm wheel 374 detachably connected to the first lead screw 371 through a bolt and engaged with the worm 373; the thrust bearing can bear larger load, so that the main beam 11 is protected by the steel strand 22; the first lead screw 371 is in threaded connection with the connecting plate 34; the worm 373 is detachably connected to the horizontal shaft 32, so that individual damaged steel strands 22 can be replaced. The driving motor 33 is started, the output shaft of the driving motor 33 drives the horizontal shaft 32 to rotate, the horizontal shaft 32 rotates to drive the worm 373 to rotate, the worm 373 rotates to drive the worm wheel 374 to rotate, the worm wheel 374 rotates to drive the first lead screw 371 to rotate, the first lead screw 371 rotates to drive the connecting plate 34 to move downwards, and the connecting plate 34 moves downwards to tighten the steel strand 22; the prestressed steel strand 22 is tensioned by applying a force opposite to the load action to the main beam 11 before bearing the load, when the main beam 11 bears the load, the load firstly offsets the prestress, and then the main beam 11 bears the force, so that the bearing capacity of the main beam 11 is increased, the main beam 11 can be protected to a certain extent, and the service life of the main beam 11 can be prolonged.

As shown in fig. 5 and 6, a plurality of protective covers 8 are sequentially installed on the top of the installation groove 31 along the length direction thereof, the protective covers 8 can be fixed on the installation groove 31 by bolts, a plurality of drain pipes 9 are sequentially installed on the bottom of the installation groove 31 along the length direction thereof, and one ends of the drain pipes 9 far away from the installation groove 31 penetrate through one side of the main beam 11. The protective cover 8 is arranged, so that the possibility of stepping empty by the pedestrian can be reduced; by providing the drain pipe 9, rainwater in the mounting groove 31 can be discharged in time, and therefore, the possibility of short circuit of the driving motor 33 due to water inflow can be reduced.

The connecting mechanism 4 for connecting the horizontal shaft 32 is installed on the output shaft of the driving motor 33, the connecting mechanism 4 comprises a yielding groove 41 which is arranged on the end surface of the output shaft of the driving motor 33 close to one end of the horizontal shaft 32, a connecting block 42 which is connected to the yielding groove 41 in a sliding manner along the axial direction of the horizontal shaft 32, a square groove 43 which is arranged on one end of the connecting block 42 close to the horizontal shaft 32, a square block 44 which is fixedly connected to one end of the horizontal shaft 32 close to the connecting block 42 and is inserted into the square groove 43, and a fixing component 45 which is installed on the connecting block 42 and is; the outer side wall of the connecting block 42 is fixedly connected with a T-shaped block 421, and the inner side wall of the abdicating groove 41 is provided with a T-shaped groove 411 for the T-shaped block 421 to slide along the axial direction of the horizontal shaft 32. When the horizontal shaft 32 needs to be driven to rotate, the square block 44 is connected with the square groove 43 in an inserting mode through the movable connecting block 42, then the square block 44 is fixed through the fixing assembly 45, so that the output shaft of the driving motor 33 can drive the horizontal shaft 32 to rotate conveniently, and moreover, when the horizontal shaft 32 does not need to rotate, the output shaft of the driving motor 33 can be separated from the horizontal shaft 32, and the possibility of safety accidents caused by accidental starting of the driving motor 33 can be reduced.

The fixing component 45 comprises a bolt 451 which is connected to the connecting block 42 in a sliding manner along the radial direction of the horizontal shaft 32, a stop block 452 which is sleeved and fixed on the bolt 451, a spring 453 which is sleeved and fixed on the bolt 451, and an insertion hole 454 which is arranged at one side of the square block 44; one end of the bolt 451 penetrates through the connecting block 42 and extends into the square groove 43 to be inserted into the jack 454, and the other end is fixedly connected with a handle 455; the stopper 452 is disposed between the handle 455 and the connecting block 42, and both ends of the spring 453 are respectively fixed to the connecting block 42 and the stopper 452. When the square block 44 is required to be inserted into the square groove 43, the bolt 451 is pulled by pulling the handle 455, then the connecting block 42 can be moved to insert the square block 44 into the square groove 43, and the bolt 451 is moved to drive the stopper 452 to move, so that the stopper 452 moves to stretch the spring 453, and at this time, the spring 453 is in a stretched state; when the square block 44 is inserted into the square groove 43, the handle 455 is released, and the stopper 452 drives the latch 451 to be inserted into the insertion hole 454 under the action of the spring 453; when the square block 44 is required to be separated from the square groove 43, the bolt 451 is separated from the jack 454 by pulling the handle 455 and pulling the bolt 451, and then the connecting block 42 is moved; in conclusion, the fixing component 45 is arranged, so that the square block 44 and the square groove 43 are conveniently inserted, and the labor intensity of operators can be reduced.

As shown in fig. 2 and 4, a clamping mechanism 5 for clamping the steel strand 22 is installed in the installation groove 31 corresponding to the connection plate 34, the clamping mechanism 5 includes a support plate 51 fixedly connected to the bottom of the installation groove 31, a second lead screw 52 rotatably connected to the top of the support plate 51 and horizontally disposed, a left thread 53 and a right thread 54 respectively disposed at two ends of the second lead screw 52, two clamping plates 55 respectively threadedly connected to the left thread 53 and the right thread 54, and a second driving assembly 56 disposed between the connection plate 34 and the support plate 51 for driving the second lead screw 52 to rotate; the bottom of the two clamping plates 55 is fixedly connected with a sliding block 551, and the top of the supporting plate 51 is provided with a sliding groove 511 for the sliding block 551 to slide along the horizontal direction. The second lead screw 52 is driven to rotate by the second driving assembly 56, and the two clamping plates 55 are driven to move towards each other by the rotation of the second lead screw 52, so that the steel strand 22 can be further fixed, and the possibility that the steel strand 22 hurts a pedestrian can be reduced.

The second driving assembly 56 comprises a rack 561 fixedly connected to one side of the connecting plate 34 and vertically arranged, and a gear 562 detachably connected to the second lead screw 52 through a bolt; the rack 561 is meshed with the gear 562; gear 562 is removably coupled to second lead screw 52, and gear 562 can be disengaged from rack 561 to facilitate controlling movement of clamp plate 55 when rotation of second lead screw 52 is not desired. The downward movement of the connecting plate 34 drives the rack 561 to move downwards, the rack 561 moves downwards to drive the gear 562 to rotate, and the gear 562 rotates to drive the second lead screw 52 to rotate, so that additional force does not need to be applied by an operator, and the labor intensity of the operator can be reduced.

As shown in fig. 2 and 7, two ends of each steel strand 22 are respectively sleeved with a protective sleeve 6, the inner diameter of each protective sleeve 6 is larger than the outer diameter of each steel strand 22, each protective sleeve 6 comprises a fixed tube 61 fixedly connected to one side of the support frame 12 through a bolt, and a movable tube 62 slidably connected to one end of the fixed tube 61 away from the support frame 12 along the axial direction of the fixed tube 61; a strip-shaped block 621 is fixedly connected to the inner side wall of the movable pipe 62, and a strip-shaped groove 611 for the strip-shaped block 621 to slide along the axial direction of the fixed pipe 61 is formed in the outer side wall of the fixed pipe 61; one end of the movable pipe 62 far away from the fixed pipe 61 is fixed on the protective plate 8 through a bolt; in order to fix the fixed tube 61, the rod 612 may be welded to the end of the fixed tube 61 away from the movable tube 62, and then the rod 612 may be fixed to the support frame 12 by bolts. The length of the protective sleeve 6 can be conveniently adjusted by arranging the fixed pipe 61 and the movable pipe 62, so that the protective sleeve 6 can be suitable for steel strands 22 with different lengths; further, by providing the protector 6, the possibility of the broken steel strand 22 jumping and injuring the pedestrian can be reduced.

As shown in fig. 5 and 8, the two ends of each through hole 21 are respectively provided with a tensioning assembly 7, each set of tensioning assemblies 7 includes a fixed frame 71 fixedly connected to one side of the supporting frame 12, a rotating shaft 72 rotatably connected to the fixed frame 71 and horizontally arranged, two torsion springs 73 respectively sleeved at two ends of the rotating shaft 72, a connecting arm 74 fixedly connected to the rotating shaft 72 and obliquely arranged, and a guide wheel 75 fixedly connected to one end of the connecting arm 74 far from the rotating shaft 72; opposite ends of the two torsion springs 73 are respectively fixedly connected to two sides of the connecting arm 74, and mutually distant ends of the two torsion springs 73 are respectively fixedly connected to two opposite inner sides of the fixing frame 71. When the steel strand 22 is installed, the steel strand 22 enables the rotating shaft 72 to rotate, the rotating shaft 72 rotates to compress the torsion spring 73, and at the moment, the torsion spring 73 is in a compressed state; when the steel strand 22 becomes loose after being used for a period of time, the steel strand 22 can be tightened under the action of the torsion spring 73, so that the steel strand 22 can conveniently protect the main beam 11.

The working principle of the steel strand protection structure for the large-span beam is as follows:

pulling the latch 451 by pulling the handle 455 moves the latch 451 to place the spring 453 in a compressed state; then the square block 44 is inserted into the square groove 43 by moving the connecting block 42, and then the handle 455 is released, at which time the bolt 451 is inserted into the insertion hole 454 by the spring 453, so that the output shaft of the driving motor 33 is connected with the horizontal shaft 32; then, the driving motor 33 is started, the output shaft of the driving motor 33 drives the horizontal shaft 32 to rotate, the horizontal shaft 32 rotates to drive the worm 373 to rotate, the worm 373 rotates to drive the worm wheel 374 to rotate, the worm wheel 374 rotates to drive the first lead screw 371 to rotate, the first lead screw 371 rotates to drive the connecting plate 34 to move downwards, and the connecting plate 34 moves downwards to tighten the steel strand 22.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides a steel strand wires protective structure for large-span roof beam which characterized in that: the bridge structure comprises bridge piers (10) and main beams (11), wherein a plurality of supporting frames (12) used for supporting the main beams (11) are arranged between the bridge piers (10), a protection device (2) is arranged between each two sides of each supporting frame (12) and each main beam (11), each protection device (2) comprises a plurality of through holes (21) which are vertically and sequentially arranged on one side of each supporting frame (12), a plurality of steel strands (22) which penetrate through the through holes (21) in a one-to-one correspondence manner, and a tightening mechanism (3) which is arranged on one side of each main beam (11) and used for tightening the steel strands (22);

the tightening mechanism (3) comprises a mounting groove (31) which is arranged on one side of the top of the main beam (11) and is arranged along the length direction of the main beam (11), a horizontal shaft (32) which is rotatably connected in the mounting groove (31) and is arranged along the length direction of the main beam (11), and two driving motors (33) which are respectively arranged at two ends of the horizontal shaft (32); two ends of the horizontal shaft (32) are respectively detachably connected to output shafts of the two driving motors (33); connecting plates (34) are respectively arranged at two ends of each steel strand (22), and a plurality of groups of first driving assemblies (37) which correspond to the connecting plates (34) one by one and are used for driving the connecting plates (34) to move vertically are mounted in the mounting grooves (31);

each group of first driving assemblies (37) comprises a first lead screw (371) vertically and rotatably connected to the bottom of the mounting groove (31) through a thrust bearing, a holding part (372) fixedly connected to the top of the first lead screw (371), a worm (373) detachably connected to the horizontal shaft (32) through a bolt, and a worm wheel (374) detachably connected to the first lead screw (371) through a bolt and meshed with the worm (373); the first lead screw (371) is in threaded connection with the connecting plate (34);

a plurality of protective covers (8) are installed in proper order along its length direction at the top of mounting groove (31), a plurality of drain pipes (9) are installed in proper order along its length direction in the bottom of mounting groove (31), the one end that mounting groove (31) were kept away from in drain pipe (9) runs through girder (11) one side and sets up.

2. The steel strand protection structure for a large span beam according to claim 1, wherein: a clamping mechanism (5) for clamping the steel strand (22) is installed in the installation groove (31) corresponding to the connecting plate (34), the clamping mechanism (5) comprises a supporting plate (51) fixedly connected to the bottom of the installation groove (31), a second lead screw (52) rotatably connected to the top of the supporting plate (51) and horizontally arranged, a left thread (53) and a right thread (54) respectively arranged at two ends of the second lead screw (52), two clamping plates (55) respectively in threaded connection with the left thread (53) and the right thread (54), and a second driving assembly (56) arranged between the connecting plate (34) and the supporting plate (51) and used for driving the second lead screw (52) to rotate; the bottom of the two clamping plates (55) is fixedly connected with a sliding block (551), and the top of the supporting plate (51) is provided with a sliding groove (511) for the sliding block (551) to slide along the horizontal direction.

3. The steel strand protection structure for a large span beam according to claim 2, wherein: the second driving assembly (56) comprises a rack (561) which is fixedly connected to one side of the connecting plate (34) and is vertically arranged, and a gear (562) which is detachably connected to the second lead screw (52) through a bolt; the rack (561) and the gear (562) are meshed with each other.

4. The steel strand protection structure for a large span beam according to claim 1, wherein: every lag (6) have been cup jointed respectively at the both ends of steel strand wires (22), the internal diameter of lag (6) is greater than the external diameter of steel strand wires (22), lag (6) slide including the axial through bolt rigid coupling in fixed pipe (61) of support frame (12) one side and along fixed pipe (61) and connect in fixed pipe (61) and keep away from movable pipe (62) of support frame (12) one end, the bolt fastening is passed through to the one end that fixed pipe (61) were kept away from in movable pipe (62).

5. The steel strand protection structure for a large span beam according to claim 4, wherein: the inside wall rigid coupling of activity pipe (62) has bar piece (621), the bar groove (611) that are used for supplying bar piece (621) to slide along the axial of fixed pipe (61) are seted up to the lateral wall of fixed pipe (61).

6. The steel strand protection structure for a large span beam according to claim 1, wherein: tensioning assemblies (7) are mounted at two ends of each through hole (21), each tensioning assembly (7) comprises a fixed frame (71) fixedly connected to one side of the support frame (12), a rotating shaft (72) rotatably connected to the fixed frame (71) and horizontally arranged, two torsion springs (73) respectively sleeved at two ends of the rotating shaft (72), a connecting arm (74) fixedly connected to the rotating shaft (72) and obliquely arranged, and a guide wheel (75) fixedly connected to one end, far away from the rotating shaft (72), of the connecting arm (74); opposite ends of the two torsion springs (73) are respectively and fixedly connected to two sides of the connecting arm (74), and ends, far away from each other, of the two torsion springs (73) are respectively and fixedly connected to two opposite inner sides of the fixed frame (71).

7. The steel strand protection structure for a large span beam according to claim 1, wherein: the connecting mechanism (4) used for connecting the horizontal shaft (32) is installed on an output shaft of the driving motor (33), the connecting mechanism (4) comprises a yielding groove (41) formed in the end face, close to one end face of the horizontal shaft (32), of the output shaft of the driving motor (33), a connecting block (42) connected to the yielding groove (41) in a sliding mode along the axial direction of the horizontal shaft (32), a square groove (43) formed in one end, close to the horizontal shaft (32), of the connecting block (42), a square block (44) fixedly connected to one end, close to the connecting block (42), of the horizontal shaft (32) and inserted into the square groove (43), and a fixing assembly (45) installed on the connecting block (42) and used for fixing the square block (44); t-shaped blocks (421) are fixedly connected to the outer side wall of the connecting block (42), and T-shaped grooves (411) used for allowing the T-shaped blocks (421) to slide along the axial direction of the horizontal shaft (32) are formed in the inner side wall of the abdicating groove (41).

8. The steel strand protection structure for a large span beam according to claim 7, wherein: the fixing component (45) comprises a bolt (451) which is connected to the connecting block (42) in a sliding manner along the radial direction of the horizontal shaft (32), a stop block (452) which is sleeved and fixed on the bolt (451), a spring (453) which is sleeved and connected on the bolt (451), and an insertion hole (454) which is formed in one side of the square block (44); one end of the bolt (451) penetrates through the connecting block (42) and extends into the square groove (43) to be inserted into the jack (454), and the other end of the bolt is fixedly connected with a handle (455); the stop block (452) is positioned between the handle (455) and the connecting block (42), and two ends of the spring (453) are respectively fixedly connected to the connecting block (42) and the stop block (452).