Steel box girder traction device

Abstract

The present application relates to the technical field of bridge construction, and discloses a steel box girder traction device. The steel box girder traction device comprises a support frame fixed onto a mounted steel box girder; a traction frame is slidably arranged on the support frame; a transmission assembly for driving the traction frame to slide is arranged on the support frame; a carrying table for placing the steel box girder is slidably arranged on the traction frame in the vertical direction; a first driving member for driving the carrying table to slide is arranged on the traction frame; positioning frames are provided on the traction frame and slidably arranged on two sides of the carrying table; the positioning frames are used for abutting against the side walls of the steel box girder; and second driving members for driving the positioning frames to slide and a fixing assembly for fixing the steel box girder are arranged on the traction frame. The present application has the effects of facilitating positioning the mounting position of the steel box girder and improving the mounting accuracy of the steel box girder.

Description

Steel box girder traction device TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge construction, in particular to a steel box girder traction device. BACKGROUND

[0002] Fabricated bridge is a kind of bridge that the lower structure and lower structure such as pier column, pile cap, bent cap, box girder, plate girder and T girder are processed in the prefabricated component factory based on BIM technology, and then transported to the construction site for hoisting and splicing. In recent years, in the aspect of transportation infrastructure construction, in order to practice the concept of green and sustainable development, minimize the interference of urban bridge construction on road traffic and people's life, and reduce the pollution to the urban and atmospheric environment, the fabricated bridge is widely used due to its short construction period, low dust pollution and low noise pollution.

[0003] The construction process of fabricated bridge is various and covers all aspects, and the installation and positioning of steel box girder is the most important link. In the bridge construction, the prefabricated steel box girder needs to be moved to the preset position by means of traction equipment. The conventional traction equipment mainly consists of a winch, a steel wire rope and a guide pulley. The steel wire rope is directly fixedly linked with the steel box girder to be dragged, the steel wire rope changes direction through the guide pulley, the winch pulls the steel wire rope, and the steel box girder is dragged. In the installation process of the steel box girder, the position of the steel box girder needs to be adjusted constantly to ensure that the steel box girder is accurately positioned with the steel box girder that has been installed. It is very inconvenient to position the installation position of the steel box girder, and the installation accuracy of the steel box girder is low. SUMMARY

[0004] In view of the problems in the prior art, the present application provides a steel box girder traction device which is convenient for positioning the installation position of the steel box girder and improves the installation accuracy of the steel box girder.

[0005] The steel box girder traction device provided by the present application adopts the following technical scheme:

[0006] A steel box girder traction device comprises a support frame fixed on a steel box girder that has been installed, a traction frame slidingly arranged on the support frame, a transmission assembly arranged on the support frame and used for driving the traction frame to slide, a load bearing platform slidingly arranged on the traction frame in a vertical direction and used for placing a steel box girder, a first driving piece arranged on the traction frame and used for driving the load bearing platform to slide, a positioning frame slidingly arranged on the traction frame on both sides of the load bearing platform, the positioning frame being used for abutting against the side wall of the steel box girder, and a second driving piece and a fixing assembly arranged on the traction frame respectively and used for driving each positioning frame to slide and fixing the steel box girder.

[0007] Optionally, the support frame comprises an upper frame body and a lower frame body, a plurality of threaded studs are fixedly arranged on the lower frame body, the axial directions of the threaded studs are parallel, a plurality of mounting holes are formed in the upper frame body, the mounting holes correspond to the threaded studs one by one, each threaded stud is slidably arranged in the corresponding mounting hole, a threaded sleeve is threadedly connected to each threaded stud, a clamping area for clamping the steel box girder is formed between the upper frame body and the lower frame body, and the traction frame is slidably arranged on the lower frame body.

[0008] Optionally, the transmission assembly comprises a lead screw and a first driving source for driving the lead screw to rotate, the lead screw is rotatably arranged on the lower frame body, the axial direction of the lead screw is parallel to the sliding direction of the traction frame, and the lead screw is threadedly connected to the traction frame.

[0009] Optionally, a plurality of rollers are rotatably arranged at the bottom of the traction frame, and a guide rail is fixedly arranged on the lower frame body, the rollers are in rolling connection with the guide rail.

[0010] Optionally, the fixing assembly comprises a pressing frame slidably arranged on the traction frame in the direction perpendicular to the bearing platform, a pressing arm rotatably arranged on the pressing frame, and a limiting piece for limiting the sliding of the pressing frame, the rotation axis of the pressing arm is perpendicular to the top wall of the bearing platform, and the pressing arm is used for pressing the top wall of the steel box girder.

[0011] Optionally, the upper frame body is further provided with a winch, a support arm is fixedly arranged on the upper frame body, a transmission wheel is rotatably arranged at the top of the support arm, the steel wire rope of the winch is wound around the transmission wheel, and the end of the steel wire rope is fixed to a suspension frame, and a clamping mechanism for clamping the steel box girder is arranged on the suspension frame.

[0012] Optionally, the clamping mechanism comprises a first clamping arm, a second clamping arm and a driving assembly, the first clamping arm and the second clamping arm are slidably arranged on the suspension frame in the direction of approaching or moving away from each other, and the driving assembly is used for driving the first clamping arm and the second clamping arm to slide.

[0013] Optionally, the driving assembly comprises a double-headed screw and a second driving source for driving the double-headed screw to rotate, the double-headed screw is rotatably arranged on the suspension frame, and the two ends of the double-headed screw are threadedly connected to the first clamping arm and the second clamping arm respectively.

[0014] Optionally, a plurality of rollers are rotatably arranged on the top wall of the bearing platform, and the axial directions of the rollers are parallel to the sliding direction of the traction frame.

[0015] In summary, the present application has at least one of the following beneficial technical effects:

[0016] 1. In the installation of steel box girder, the support frame is fixed on the installed steel box girder at the construction position of the steel box girder, then the steel box girder to be installed is hoisted to the load bearing platform on the traction frame, the load bearing platform is driven to lift by the first driving member to adjust the vertical height of the steel box girder, the positioning frames on both sides of the load bearing platform are driven to slide by the second driving members on the traction frame respectively and push the steel box girder to slide on the load bearing platform respectively to adjust the horizontal position of the steel box girder, after the position of the steel box girder is adjusted, the steel box girder is fixed by the fixing assembly, finally the traction frame is driven to move towards the installed steel box girder by the transmission assembly, so that the steel box girder to be installed is connected with the installed steel box girder, which is convenient and fast for positioning the installation position of the steel box girder and improves the installation accuracy of the steel box girder.

[0017] 2. The support frame is divided into an upper frame body and a lower frame body, and the steel box girder is clamped by the upper frame body and the lower frame body, so that the support frame is fixed on the steel box girder without additional scaffolding, which makes the construction more convenient.

[0018] 3. The winch is arranged on the upper frame body and fixed on the tail of the steel box girder to be installed by the suspension frame, as the traction frame slides on the lower frame body, the steel wire rope is gradually tightened by the winch to pull the steel box girder, which increases the stability of the steel box girder on the traction frame and improves the safety of the construction.

[0019] 4. A plurality of rollers are arranged on the load bearing platform, which are in rolling connection with the bottom of the steel box girder after the steel box girder is placed on the load bearing platform, so as to adjust the position of the steel box girder on the load bearing platform. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a schematic view of the overall structure of the steel box girder traction device of the present application;

[0021] Fig. 2 is a schematic view of the structure of the traction frame of the embodiment of the present application;

[0022] Fig. 3 is an enlarged view of part A in Fig. 2;

[0023] Fig. 4 is an enlarged view of part B in Fig. 2;

[0024] Fig. 5 is a schematic view of the structure of the suspension frame of the embodiment of the present application.

[0025] Explanation of reference signs: 1, support frame; 11, upper frame body; 111, support arm; 112, transmission wheel; 12, lower frame body; 121, stud; 122, screw sleeve; 123, guide rail; 124, lead screw; 125, guide rod; 126, first driving source; 127, first driving member; 13, clamping interval; 2, traction frame; 21, placement interval; 22, roller; 23, positioning frame; 24, second driving member; 25, pressing frame; 251, pressing arm; 252, connecting plate; 26, limiting screw; 261, nut; 3, load bearing platform; 31, roller shaft; 4, winch; 5, suspension frame; 51, first clamping arm; 511, first sliding block; 52, second clamping arm; 521, second sliding block; 53, first sliding groove; 54, second sliding groove; 55, double-headed screw; 56, second driving source. DETAILED DESCRIPTION

[0026] The present application will be further described in detail below in combination with Figs. 1-5.

[0027] The embodiment of the present application discloses a steel box girder traction device, referring to Fig. 1, comprising a support frame 1, the support frame 1 comprising an upper frame body 11 and a lower frame body 12, a traction frame 2 being slidingly arranged on the lower frame body 12, and a placement interval 21 for placing the steel box girder being arranged on the traction frame 2. A load bearing platform 3 is slidingly arranged in the placement interval 21 of the traction frame 2 in a vertical direction, and a top wall of the load bearing platform 3 is horizontal.

[0028] Referring to Figs. 1 and 2, a plurality of studs 121 are fixedly arranged on the lower frame body 12, and the axial directions of the studs 121 are parallel. A plurality of mounting holes are formed on the upper frame body 11, the mounting holes correspond to the studs 121 one by one, and each stud 121 slidingly passes through a corresponding mounting hole. A screw sleeve 122 is threadedly connected to each stud 121. The upper frame body 11 and the lower frame body 12 form a clamping interval 13 for clamping the steel box girder. The steel box girder is clamped by the upper frame body 11 and the lower frame body 12, and each stud 121 passes through a corresponding mounting hole on the upper frame body 11, then the screw sleeve 122 is tightened on each stud 121, so that the support frame 1 can be fixed on the steel box girder which has been installed, and a scaffold does not need to be additionally built to fix the support frame 1, and the construction is more convenient.

[0029] Referring to Figs. 2 and 3, two guide rails 123 are fixedly arranged on the lower frame body 12, and the length directions of the two guide rails 123 are parallel. A plurality of supports are fixedly arranged on the bottom of the traction frame 2, a roller 22 is rotatably arranged on each support, each guide rail 123 corresponds to a plurality of rollers 22, and each roller 22 is rollingly connected to a corresponding guide rail 123. The rollers 22 are arranged on the bottom of the traction frame 2 and rollingly connected to the guide rails 123 on the lower frame body 12, so that the sliding of the traction frame 2 is more convenient and stable, and the mutual abrasion between the traction frame 2 and the lower frame body 12 is avoided.

[0030] Referring to Fig. 2, the support frame 1 is provided with a transmission assembly for driving the traction frame 2 to slide, which comprises a lead screw 124, a guide rod 125 and a first driving source 126. The lead screw 124 is rotationally arranged on the lower frame body 12, and the axial direction of the lead screw 124 is parallel to the length direction of the guide rail 123. The lead screw 124 is threadedly connected with the traction frame 2. The guide rod 125 is fixedly arranged on the lower frame body 12, and the length direction of the guide rod 125 is parallel to the length direction of the lead screw 124. The first driving source 126 comprises a first motor, which is fixedly arranged on the lower frame body 12, and the output shaft of the first motor is coaxially fixedly connected with the lead screw 124.

[0031] Referring to Fig. 2, the traction frame 2 is provided with a first driving member 127 for driving the load support platform 3 to slide, which comprises a hydraulic cylinder fixedly arranged on the traction frame 2, and the piston rod of the hydraulic cylinder is fixedly connected with the load support platform 3.

[0032] Referring to Fig. 2, the top wall of the load support platform 3 is rotationally provided with a plurality of rollers 31, and the axial direction of each roller 31 is parallel to the length direction of the lead screw 124. A plurality of rollers 31 are arranged on the load support platform 3, which are in rolling connection with the bottom of the steel box girder after the steel box girder is placed on the load support platform 3, thereby facilitating the adjustment of the position of the steel box girder on the load support platform 3.

[0033] Referring to Fig. 2, the placing area 21 of the traction frame 2 and the two sides of the load support platform 3 are both slidingly provided with positioning frames 23. The traction frame 2 is respectively provided with second driving members 24 for driving each positioning frame 23 to slide, which comprises a pneumatic cylinder fixedly arranged on the traction frame 2, and the piston rod of the pneumatic cylinder is fixedly connected with the positioning frame 23. After the steel box girder to be installed is placed on the load support platform 3, the positioning frames 23 on the two sides of the load support platform 3 are driven to slide by the respective pneumatic cylinders on the traction frame 2, thereby pushing the steel box girder to slide on the load support platform 3, so as to adjust the horizontal position of the steel box girder, and make the positioning frames abut against the two sides of the steel box girder, so that the steel box girder to be installed is accurately aligned with the steel box girder that has been installed.

[0034] Referring to Figs. 2 and 4, the two sides of the traction frame 2 are both provided with a plurality of fixing assemblies for fixing the steel box girder, which comprises a pressing frame 25 slidingly arranged on the traction frame 2 in the direction perpendicular to the load support platform 3, a pressing arm 251 rotationally arranged on the pressing frame 25, and a limiting member for preventing the pressing frame 25 from sliding. The two sides of the traction frame 2 are both provided with a plurality of guide grooves in the direction perpendicular to the top wall of the load support platform 3, and each guide groove corresponds to one pressing frame 25. The pressing frame 25 is slidingly arranged in the corresponding guide groove. The rotation axis of the pressing arm 251 is perpendicular to the top wall of the load support platform 3.

[0035] Referring to Fig. 4, the limiting member comprises a limiting screw 26 fixedly arranged on the traction frame 2, the axial direction of the limiting screw 26 is perpendicular to the top wall of the bearing platform 3. The pressing frame 25 is fixedly arranged with a connecting plate 252, the connecting plate 252 is provided with a through hole along the axial direction of the limiting screw 26, the limiting screw 26 passes through the through hole of the corresponding connecting plate 252, and the limiting screw 26 is threadedly connected with a nut 261. When the position adjustment of the steel box girder is completed, the pressing arm 251 is rotated to the upper side of the top wall of the steel box girder, and then the nut 261 is rotated to press the top wall of the steel box girder by the pressing arm 251, so that the steel box girder is fixed on the traction frame 2.

[0036] Referring to Figs. 1 and 5, the upper frame body 11 is provided with a winch 4, and the upper frame body 11 is further fixedly provided with a supporting arm 111, and the top of the supporting arm is rotatably provided with a transmission wheel 112. The steel wire rope of the winch 4 is wound around the transmission wheel 112, and the end of the steel wire rope is fixedly connected to the suspension frame 5. The suspension frame 5 is provided with a clamping mechanism for clamping the steel box girder. The winch 4 is arranged on the upper frame body 11, and is fixed to the tail of the steel box girder to be installed through the suspension frame 5. As the traction frame 2 slides on the lower frame body 12, the winch 4 gradually tightens the steel wire rope, thereby tensioning the steel box girder, which increases the stability of the steel box girder on the traction frame 2 and improves the safety of the construction.

[0037] Referring to Fig. 5, the clamping mechanism comprises a first clamping arm 51, a second clamping arm 52 and a driving assembly. The cross sections of the first clamping arm 51 and the second clamping arm 52 are both L-shaped. The suspension frame 5 is provided with a first sliding groove 53 and a second sliding groove 54 along the length direction of the suspension frame 5. The first clamping arm 51 is fixedly provided with a first sliding block 511, and the second clamping arm 52 is fixedly provided with a second sliding block 521. The cross sections of the first sliding block 511 and the second sliding block 521 are both T-shaped. The first sliding groove 53 is adapted to the first sliding block 511, and the second sliding groove 54 is adapted to the second sliding block 521. The first sliding block 511 is slidingly arranged in the first sliding groove 53, and the second sliding block 521 is slidingly arranged in the second sliding groove 54.

[0038] Referring to Fig. 5, the driving assembly comprises a double-end screw 55 and a second driving source 56. The double-end screw 55 is rotationally arranged on the suspension frame 5 and its length direction is parallel to the length direction of the suspension frame 5. The two ends of the double-end screw 55 pass through the first sliding slot 53 and the second sliding slot 54 respectively and are threadedly engaged with the first sliding block 511 and the second sliding block 521 respectively. The second driving source 56 comprises a second motor fixedly arranged on the suspension frame 5. The output shaft of the second motor is coaxially fixedly provided with a driving gear. A driven gear is coaxially fixedly arranged on the double-end screw 55. The driving gear is engaged with the driven gear. The suspension frame 5 is placed on the top wall of the steel box girder and the steel box girder is located between the first clamping arm 51 and the second clamping arm 52. Then the double-end screw 55 is driven to rotate by the second motor, thereby driving the first clamping arm 51 and the second clamping arm 52 to approach each other, so as to clamp the steel box girder, thereby fixing the suspension frame 5 on the steel box girder.

[0039] The implementation principle of the steel box girder traction device of the present application is as follows. When installing the steel box girder, the steel box girder is clamped by the upper frame body 11 and the lower frame body 12. The studs 121 pass through the corresponding mounting holes in the upper frame body 11 and the nuts 122 are tightened on the studs 121, thereby fixing the support frame 1 on the installed steel box girder at the steel box girder construction position. Then the steel box girder to be installed is hoisted onto the load bearing platform 3 on the traction frame 2. The load bearing platform 3 is driven to ascend and descend by the hydraulic cylinder, thereby adjusting the vertical height of the steel box girder. The positioning frames 23 on both sides of the load bearing platform 3 are driven to slide by the pneumatic cylinders on the traction frame 2, thereby adjusting the horizontal position of the steel box girder. The positioning frames abut against the two sides of the steel box girder, so that the to-be-installed steel box girder is accurately aligned with the installed steel box girder. When the position of the steel box girder is adjusted, the pressing arm 251 is rotated above the top wall of the steel box girder. Then the pressing arm 251 is pressed against the top wall of the steel box girder by rotating the nut 261, thereby fixing the steel box girder on the traction frame 2. Finally, the lead screw 124 is driven to rotate by the first motor, thereby driving the traction frame 2 to move towards the installed steel box girder, so that the to-be-installed steel box girder is butt-jointed with the installed steel box girder. The position of the steel box girder is positioned conveniently and quickly and the installation accuracy of the steel box girder is improved.

[0040] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application. Any equivalent changes made on the basis of the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A steel box girder towing device, characterized by: The utility model provides a steel box girder installation support frame, which comprises a support frame (1) fixed on a completed steel box girder, a traction frame (2) slidingly arranged on the support frame (1), a transmission assembly arranged on the support frame (1) for driving the traction frame (2) to slide, a load bearing platform (3) for placing the steel box girder slidingly arranged on the traction frame (2) in the vertical direction, a first driving member (127) arranged on the traction frame (2) for driving the load bearing platform (3) to slide, a positioning frame (23) slidingly arranged on the traction frame (2) on both sides of the load bearing platform (3), the positioning frame (23) being used for abutting against the side wall of the steel box girder, and a fixing assembly arranged on the traction frame (2) for fixing the steel box girder.

2. The steel box girder towing apparatus according to claim 1, characterized by: The support frame (1) comprises an upper frame body (11) and a lower frame body (12), a plurality of studs (121) are fixedly arranged on the lower frame body (12), the axial directions of the studs (121) are parallel, a plurality of mounting holes are formed in the upper frame body (11) and correspond to the studs (121) one by one, each stud (121) slidingly penetrates through a corresponding mounting hole, a sleeve (122) is threadedly connected to each stud (121), a clamping interval (13) for clamping the steel box girder is formed between the upper frame body (11) and the lower frame body (12), and the traction frame (2) is slidingly arranged on the lower frame body (12).

3. The steel box girder pulling device according to claim 2, characterized in that: The transmission assembly comprises a lead screw (124) and a first driving source (126) for driving the lead screw (124) to rotate, the lead screw (124) is rotationally arranged on the lower frame body (12), the axial direction of the lead screw (124) is parallel to the sliding direction of the traction frame (2), and the lead screw (124) is threadedly connected to the traction frame (2).

4. The steel box girder pulling device according to claim 3, characterized in that: A plurality of rollers (22) are rotationally arranged on the bottom of the traction frame (2), and a guide rail (123) is fixedly arranged on the lower frame body (12), the rollers (22) are in rolling connection with the guide rail (123).

5. The steel box girder pulling device according to claim 1, characterized in that: The fixing assembly comprises a pressing frame (25) slidingly arranged on the traction frame (2) in the vertical direction of the load bearing platform (3), a pressing arm (251) rotationally arranged on the pressing frame (25), and a limiting member for preventing the pressing frame (25) from sliding, the rotation axis of the pressing arm (251) is perpendicular to the top wall of the load bearing platform (3), and the pressing arm (251) is used for pressing the top wall of the steel box girder.

6. The steel box girder pulling device according to claim 2, characterized in that: The upper frame body (11) is further provided with a winch (4), a support arm (111) is fixedly arranged on the upper frame body (11), a transmission wheel (112) is rotationally arranged on the top of the support arm (111), the steel wire rope of the winch (4) is wound around the transmission wheel (112) and then fixedly connected to a suspension frame (5) at the end, and the suspension frame (5) is provided with a clamping mechanism for clamping the steel box girder.

7. The steel box girder pulling device according to claim 6, characterized in that: The clamping mechanism comprises a first clamping arm (51), a second clamping arm (52) and a driving assembly, the first clamping arm (51) and the second clamping arm (52) are slidingly arranged on the suspension frame (5) in the direction of approaching or moving away from each other, and the driving assembly is used for driving the first clamping arm (51) and the second clamping arm (52) to slide.

8. The steel box girder pulling device according to claim 7, characterized in that: The driving assembly comprises a double-end screw (55) and a second driving source (56) used for driving the double-end screw (55) to rotate, the double-end screw (55) is rotatably arranged on the suspension frame (5), and two ends of the double-end screw (55) are respectively threadedly connected with the first clamping arm (51) and the second clamping arm (52).

9. The steel box girder pulling device according to claim 1, characterized in that: A plurality of rollers (31) are rotatably arranged on the top wall of the bearing platform (3), and the axial direction of each roller (31) is parallel to the sliding direction of the traction frame (2).

Images