Positioning device for construction of bridge fabrication machine

Abstract

The invention provides a positioning device and method for construction of a bridge fabrication machine. The positioning device comprises a main body, two rotating discs, a synchronous driving assembly and a locking assembly. The main body is fixedly arranged on a bridge floor and is positioned between two bridge fabrication machines; the two turntables are rotationally connected to the main body; a plurality of cables which are arranged at intervals in the axial direction of each rotating disc are wound on each rotating disc; the plurality of cables on the two turntables horizontally extend out respectively and are connected with the two groups of bridge fabrication machines respectively so as to tension the bridge fabrication machines; the synchronous driving assembly is in transmission connection with the two rotating discs so as to be suitable for driving the two rotating discs to rotate in opposite directions; the locking assembly is arranged on the main body and is used for being connected with each cable. According to the positioning device for construction of the bridge fabrication machines, by switching the locking assembly to the locking state or the unlocking state, the two bridge fabrication machines can be fixed or unlocked; compared with the prior art, the bridge fabrication machine can be fixed or unlocked more conveniently and quickly, and the overall construction efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, and more specifically, relates to a positioning device for bridge construction machine. Background Art

[0002] Cantilevered cast-in-place construction technology is a construction method used in bridge construction, mainly used in large-span bridge construction, such as continuous beams, continuous rigid frames, cable-stayed bridges, prestressed concrete simply supported beam bridges, etc. Cantilevered cast-in-place construction technology uses a movable bridge-building machine as construction equipment to pour concrete symmetrically in sections on both sides of the bridge piers. After the concrete strength reaches the requirement, prestress is applied, and then the bridge-building machine is moved to carry out construction of the next section.

[0003] At present, when carrying out suspended cast-in-place construction, the construction unit will set up bridge-building machines on both sides of the pier. Each bridge-building machine can be moved to the outside of the bridge deck to assist in concrete pouring construction. In the process of the bridge-building machine assisting in pouring construction, in order to improve the safety of the bridge-building machine, it is necessary to use anchors to fix the bridge-building machine to the bridge deck after the bridge-building machine is moved.

[0004] The inventors found that every time the bridge-building machine needs to be moved, the construction unit needs to remove the anchors that fix the bridge-building machine. After the bridge-building machine is moved to the designated area, the bridge-building machine needs to be fixed again with the anchors. The repeated fixing process is laborious and cumbersome, which reduces the overall construction efficiency. Summary of the invention

[0005] The purpose of the present application is to provide a positioning device for bridge-building machine construction, aiming to solve the technical problem that during the existing bridge-building machine construction process, anchor nails need to be repeatedly used to fix the bridge-building machine, resulting in reduced overall construction efficiency.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted in this application is: to provide a positioning device for bridge construction, comprising: A main body, which is used to be fixedly arranged on the bridge deck and is located between the two groups of bridge-building machines; Two rotating discs are rotatably connected to the main body; each of the rotating discs is wound with a plurality of cables spaced along its axial direction; the plurality of cables on the two rotating discs extend horizontally and are respectively connected to the two groups of bridge-building machines to tighten the bridge-building machines; a synchronous driving assembly, drivingly connected to the two rotating disks, so as to drive the two rotating disks to rotate in opposite directions; and A locking assembly, disposed on the main body, and used to connect with each of the cables; The locking assembly has a locking state and an unlocking state. In the locking state, the locking assembly is connected to each of the cables to limit the extension / retraction of the cables.

[0007] Preferably, the plurality of cables on one of the turntables correspond one-to-one to the plurality of cables on the other turntable; The locking assembly comprises: A plurality of clamping plate groups are arranged on the main body at intervals along the rotation axis of the turntable, each of the clamping plate groups includes two clamping plates connected to the corresponding two cables and slidably connected to the main body; adjacent sides of the two clamping plates have grooves for the cables to be embedded, and the grooves have protrusions suitable for connecting with the cables; each clamping plate is provided with a threaded hole, and the thread directions of the two threaded holes on the two clamping plates are opposite; and The driving screw rod is provided with a plurality of threaded portions at intervals along its axial direction; the plurality of threaded portions correspond to the plurality of threaded holes one by one and are threadedly connected; Wherein, by rotating the driving screw, the two clamping plates in each clamping plate group are driven to move toward or away from each other.

[0008] Preferably, a rotating handle is provided at one end of the driving screw; a fixing nut is sleeved on the driving screw, the fixing nut is located between the rotating handle and the main body, and the fixing nut is threadedly connected to the driving screw; one end of the fixing nut is suitable for abutting against the main body to fix the driving screw.

[0009] Preferably, a fixing member is provided between the two clamping plates in each clamping plate group; when the driving screw drives the two clamping plates to move toward each other, the fixing member is suitable for connecting the two clamping plates to limit the movement of the two clamping plates.

[0010] Preferably, the fixing member comprises: Two clamping rods are respectively arranged on the two clamping plates, and the axes of the two clamping rods are parallel; and A clamping plate, arranged on the outer side of the clamping plate and having two clamping grooves for the two clamping rods to be embedded; Wherein, the end of each of the clamping rods has a baffle plate suitable for abutting against the clamping plate, so as to limit the clamping slot from being separated from the clamping rod.

[0011] Preferably, each of the protrusions has an inclined surface inclined toward the turntable.

[0012] Preferably, the synchronous drive assembly comprises: A first outer gear ring, coaxially sleeved on one of the rotating disks; A second outer gear ring, coaxially sleeved on the other rotating disk; and A driving motor, arranged on the main body; The first outer gear ring is meshingly connected with the second outer gear ring, and the output shaft of the drive motor is drivingly connected with one of the turntables to drive the two turntables to rotate in opposite directions.

[0013] Preferably, the main body is provided with a plurality of guide wheels connected to the plurality of cables one by one; the plurality of guide wheels are all located on the upper side of the turntable, so as to make a section of the cable located between the bridge-building machine and the guide wheels in a horizontal state.

[0014] Preferably, the main body is provided with a plurality of guide tubes for the plurality of cables to pass through one by one, each of the guide tubes is located between the turntable and the guide wheel, and the inner diameter of each of the guide tubes gradually decreases in the direction away from the turntable.

[0015] Preferably, the turntable further comprises: A plurality of articulated components are respectively arranged between each of the cables and the bridge-building machine; both ends of each of the articulated components are respectively fixedly connected to the cables and the bridge-building machine, and the axial direction of the rotating shaft of each of the articulated components is parallel to the axial direction of the rotating disk.

[0016] In the embodiment of the present application, the main body is installed between two bridge-building machines and fixedly installed on the bridge deck; when the two bridge-building machines move toward the outside of the bridge deck, the two turntables rotate in opposite directions driven by the synchronous drive assembly, so that the multiple cables on the two turntables are suitable for horizontally extending respectively; when the two bridge-building machines move to the specified position, the synchronous drive assembly is controlled to stop, and the construction personnel simultaneously control the locking assembly to connect with each cable to limit the extension of the cable or retract the turntable, thereby achieving the purpose of fixing the two bridge-building machines.

[0017] The positioning device for bridge-building machine construction provided by the present invention can fix or unlock two bridge-building machines by switching the locking assembly to a locked state or an unlocked state; compared with the prior art, the fixing or unlocking of the bridge-building machine is more convenient and quick, and the overall construction efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a positioning device for bridge construction provided by an embodiment of the present invention; Figure 2 A schematic side view of the structural diagram of a positioning device for bridge construction provided by an embodiment of the present invention; Figure 3 A schematic cross-sectional view of a positioning device for bridge construction provided by an embodiment of the present invention; Figure 4 for Figure 1 Schematic diagram of the enlarged structure of the A area in the middle; Figure 5 for Figure 1 Schematic diagram of the enlarged structure of the middle B area; Figure 6 A schematic diagram of the three-dimensional structure of a splint used in an embodiment of the present invention; Figure 7 A schematic diagram of the three-dimensional structure of a guide tube used in an embodiment of the present invention; Figure 8 A schematic diagram of the three-dimensional structure of a driving screw rod used in an embodiment of the present invention; Fig. 9 A schematic diagram of the three-dimensional structure of a clamping plate used in an embodiment of the present invention; Among them, the reference numerals in the figure are: 1. Main body; 11. Guide wheel; 12. Guide tube; 2. Turntable; 21. Cable; 22. Articulated member; 3. Synchronous drive assembly; 31. First outer gear ring; 32. Second outer gear ring; 33. Drive motor; 4. Locking assembly; 41. Clamp; 411. Groove; 412. Protrusion; 413. Threaded hole; 42. Drive screw; 421. Threaded portion; 422. Rotating handle; 423. Fixing nut; 5. Fixing member; 51. Clamping rod; 511. Baffle; 52. Clamping plate; 521. Clamping groove; 6. Bridge-building machine. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] Please also read Figures 1 to 3 The positioning device for bridge construction provided by the present application is now described. The positioning device for bridge construction is used to connect with the bridge construction machine 6, and the bridge construction machine 6 is provided with two; the positioning device for bridge construction includes a main body 1, two turntables 2, a synchronous drive assembly 3 and a locking assembly 4.

[0025] The main body 1 is used to be fixedly arranged on the bridge deck and is located between two bridge-building machines 6; the main body 1 can be fixed on the bridge deck by anchoring.

[0026] Both turntables 2 are rotatably connected to the main body 1; each turntable 2 is wound with a plurality of cables 21 arranged at intervals along its axial direction; the plurality of cables 21 on the two turntables 2 are respectively extended horizontally and are respectively connected to two groups of bridge-building machines 6 to tighten the bridge-building machines 6; the initial length of each cable 21 is adaptively adjusted to the distance between the initial position of the corresponding connected bridge-building machine 6 and the turntable 2 to ensure that the tension of each cable 21 is approximately the same.

[0027] The synchronous drive assembly 3 is connected to the two turntables 2 in transmission so as to drive the two turntables 2 to rotate in opposite directions; a clutch mechanism is provided between the synchronous drive assembly 3 and the two turntables 2, and the clutch mechanism can enable the two turntables 2 to be disengaged from the synchronous drive assembly 3 so as to adjust the initial positions of the multiple cables 21 on the two turntables 2.

[0028] The locking assembly 4 is disposed on the main body 1 and is used to connect with each cable 21 .

[0029] The locking assembly 4 has a locked state and an unlocked state. In the locked state, the locking assembly 4 is connected to each cable 21 to limit the extension / retraction of the cable 21 .

[0030] In the embodiment of the present application, the main body 1 is installed between two bridge-building machines 6 and fixedly installed on the bridge deck; when the two bridge-building machines 6 move toward the outside of the bridge deck, the two turntables 2 rotate in opposite directions driven by the synchronous drive assembly 3, so that the multiple cables 21 on the two turntables 2 are suitable for extending horizontally respectively; when the two bridge-building machines 6 move to the specified position, the synchronous drive assembly 3 is controlled to stop, and the construction personnel simultaneously control the locking assembly 4 to connect with each cable 21, which is used to limit the cable 21 from extending out or retracting the turntable 2, thereby achieving the purpose of fixing the two bridge-building machines 6.

[0031] The positioning device for bridge-building machine construction provided by the present invention can fix or unlock two bridge-building machines 6 by switching the locking assembly 4 to a locked state or an unlocked state; compared with the prior art, the fixing or unlocking of the bridge-building machine 6 is more convenient and quick, and the overall construction efficiency is improved.

[0032] In some embodiments, please refer to Figures 1 to 3 , Figure 6 and Figure 8 As a specific embodiment of the positioning device for bridge-building machine construction provided by the present invention, multiple cables 21 on one turntable 2 correspond one to one with multiple cables 21 on another turntable 2; the corresponding two cables 21 are respectively used to connect to the two bridge-building machines 6.

[0033] The locking assembly 4 includes a plurality of clamping plate groups and a driving screw 42 .

[0034] A plurality of clamping plate groups are arranged on the main body 1 at intervals along the rotation axis of the turntable 2, and each clamping plate group includes two clamping plates 41 connected to the corresponding two cables 21 and slidably connected to the main body 1; the adjacent sides of the two clamping plates 41 have grooves 411 for the cables 21 to be embedded, and the grooves 411 have protrusions 412 suitable for connecting with the cables 21; each clamping plate 41 is provided with a threaded hole 413, and the thread directions of the two threaded holes 413 on the two clamping plates 41 are opposite.

[0035] The driving screw rod 42 is provided with a plurality of threaded portions 421 at intervals along its axial direction; the plurality of threaded portions 421 correspond to the plurality of threaded holes 413 one by one and are threadedly connected.

[0036] By adopting the above-mentioned technical scheme, when the bridge-building machine 6 needs to be fixed, the construction personnel rotate the driving screw 42 by means of handle drive or motor drive, which can drive the two clamps 41 in each clamp group to move toward each other, so that the two clamps 41 clamp the corresponding two cables 21, thereby fixing each cable 21, and then fixing the two bridge-building machines 6; when the bridge-building machine 6 needs to be moved, the construction personnel rotate the driving screw 42 by means of handle drive or motor drive, which can drive the two clamps 41 in each clamp group to move back to back, so that the two clamps 41 release the corresponding two cables 21, so that the cables 21 can be restored to a movable state, and then during the movement of the bridge-building machine, the release of the cables 21 can be achieved by controlling the turntable 2.

[0037] In some embodiments, please refer to Figure 1 and Figure 2 As a specific embodiment of the positioning device for bridge construction provided by the present invention, a rotating handle 422 is provided at one end of the driving screw 42, and the rotating handle 422 adopts a larger turntable 2-type handle to achieve a labor-saving effect; a fixing nut 423 is sleeved on the driving screw 42, and the fixing nut 423 is located between the rotating handle 422 and the main body 1, and the fixing nut 423 is threadedly connected to the driving screw 42; one end of the fixing nut 423 is suitable for abutting against the main body 1 to fix the driving screw 42.

[0038] By adopting the above technical solution, the construction personnel can rotate the rotating handle 422 without driving the driving screw 42 to rotate. After the construction personnel complete the adjustment of the driving screw 42, they rotate the fixing nut 423 until the fixing nut 423 is connected with the main body 1. At this time, the construction personnel cannot rotate the rotating handle 422 to achieve the purpose of fixing the driving screw 42; when the driving screw 42 needs to be adjusted again, it is only necessary to rotate the fixing nut 423 away from the main body 1, and the rotating handle 422 can be rotated to achieve the purpose of driving the driving screw to rotate.

[0039] In some embodiments, see Figure 2 , Figure 3 and Figure 5 As a specific embodiment of the positioning device for bridge construction provided by the present invention, a fixing member 5 is also provided between the two clamping plates 41 in each clamping plate group; when the driving screw 42 drives the two clamping plates 41 to move toward each other, the fixing member 5 is suitable for connecting the two clamping plates 41 to limit the movement of the two clamping plates 41.

[0040] By adopting the above technical solution, after the construction personnel adjust the driving screw 42 to control the two clamps 41 to fix the two cables 21, the fixing component 5 can further fix the two clamps 41 to prevent the two clamps 41 from detaching from the two cables 21 after the thread on the driving screw 42 fails, thereby achieving the purpose of improving safety.

[0041] In some embodiments, please refer to Figure 2 , Figure 3 , Figure 5 , Figure 6 and Fig. 9 As a specific embodiment of the positioning device for bridge construction provided by the present invention, the fixing member 5 includes two clamping rods 51 and a clamping plate 52.

[0042] The two clamping rods 51 are respectively disposed on the two clamping plates 41 , and the axial directions of the two clamping rods 51 are parallel.

[0043] The clamping plate 52 is disposed on the outer side of the clamping plate 41 and has two clamping grooves 521 for the two clamping rods 51 to be inserted into.

[0044] The end of each clamping rod 51 has a baffle 511 suitable for abutting against the clamping plate 52 to limit the clamping slot 521 from being separated from the clamping rod 51 .

[0045] By adopting the above-mentioned technical solution, after the construction personnel drive multiple clamping plate groups to fix multiple cables 21 by adjusting the driving screw 42, the construction personnel can manually install multiple clamping plates 52 respectively between the two clamping plates 41 on each clamping plate group to fix the two clamping plates 41, thereby preventing the failure of multiple clamping plate groups due to the failure of the driving screw 42, thereby improving the overall safety performance of the device.

[0046] In some embodiments, see Figure 6 As a specific embodiment of the positioning device for bridge construction provided by the present invention, each protrusion 412 has an inclined surface inclined toward the direction of the turntable 2.

[0047] By adopting the above technical solution, the protrusion 412 adopts a structure with an inclined surface, which can ensure that when the two clamps 41 are connected to the cable 21, the inclined surface inclined toward the turntable 2 can increase the friction between each protrusion 412 and the cable 21, thereby improving the effect of the clamp 41 clamping the cable.

[0048] In some embodiments, please refer to Figures 1 to 3 As a specific implementation of the positioning device for bridge construction provided by the present invention, the synchronous drive assembly 3 includes a first outer gear ring 31, a second outer gear ring 32 and a drive motor 33.

[0049] The first outer gear ring 31 is coaxially sleeved on one of the rotating disks 2 .

[0050] The second outer gear ring 32 is coaxially sleeved on another turntable 2 , wherein the number of teeth of the second outer gear ring 32 is the same as the number of teeth and the module of the first outer gear ring 31 ; the second outer gear ring 32 is meshingly connected with the first outer gear ring 31 .

[0051] The driving motor 33 is arranged on the main body 1 and is detachably connected to the main body 1, which is convenient for maintenance and replacement; a clutch mechanism can be set between the driving motor 33 and the two turntables 2, and the clutch mechanism can control the output shaft of the driving motor 33 to be connected or separated from the two turntables 2; through the clutch mechanism, the initial position of the two turntables 2 can be adjusted.

[0052] By adopting the above technical solution, the first outer gear ring 31 is meshedly connected with the second outer gear ring 32, and the output shaft of the driving motor 33 is drivingly connected with one of the turntables 2, so as to be suitable for driving the two turntables 2 to rotate in opposite directions.

[0053] In some embodiments, please refer to Figures 1 to 3 As a specific embodiment of the positioning device for bridge-building machine construction provided by the present invention, a main body 1 is provided with a plurality of guide wheels 11 connected to a plurality of cables 21 in one-to-one correspondence; the plurality of guide wheels 11 are all located on the upper side of the turntable 2, and the height of each guide wheel 11 is consistent with the installation position height of the cable 21 and the bridge-building machine 6, so as to make a section of the cable 21 located between the bridge-building machine 6 and the guide wheel 11 in a horizontal state.

[0054] By adopting the above-mentioned technical solution, the guide wheel 11 can guide the corresponding cable 21 to a horizontal state, so that the bridge-building machine 6 can be subjected to a horizontal force toward the bridge deck, so as to offset the force exerted on the bridge-building machine 6 toward the outside of the bridge deck during the construction process, thereby playing a balancing role and improving the stability of the bridge-building machine 6 during construction.

[0055] In some embodiments, please refer to Figure 2 , Figure 3 and Figure 7 As a specific embodiment of the positioning device for bridge construction provided by the present invention, a main body 1 is provided with a plurality of guide tubes 12 for a plurality of cables 21 to pass through one by one, each guide tube 12 is located between the turntable 2 and the guide wheel 11, and the inner diameter of each guide tube 12 gradually decreases in the direction away from the turntable 2.

[0056] By adopting the above technical solution, the guide tube 12 can ensure that the cable 21 on each turntable 2 is always facing the top of the turntable 2 when it extends out of the turntable 2, and the inner diameter of each guide tube 12 gradually decreases in the direction away from the turntable 2, that is, it is trumpet-shaped, which can reduce the friction between the cable 21 and the corresponding guide tube 12 and increase the service life of the guide tube 12.

[0057] In some embodiments, please refer to Figure 1 and Figure 4 As a specific implementation of the positioning device for bridge construction provided by the present invention, the turntable 2 also includes a plurality of hinged components 22.

[0058] Multiple articulated components 22 are respectively arranged between each cable 21 and the bridge-building machine 6; the two ends of each articulated component 22 are respectively fixedly connected to the cable 21 and the bridge-building machine 6, and the axial direction of the rotating shaft of each articulated component 22 is parallel to the axial direction of the turntable 2.

[0059] By adopting the above technical solution, when the bridge-building machine 6 is impacted and vibrated during the construction process, the hinged component 22 can make the end of the cable 21 and the bridge-building machine 6 swing. During this process, the force between the cable 21 and the bridge-building machine 6 is always in the horizontal direction, avoiding the direction of the force from shifting, resulting in an imbalance of the force on the bridge-building machine 6, thereby causing damage to the equipment; therefore, by arranging a hinged component 22 between the end of the cable 21 and the bridge-building machine 6, the stability of the bridge-building machine 6 can be improved.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A positioning device for bridge construction, used for connecting to a bridge construction machine (6), wherein the bridge construction machine (6) is provided with two; characterized in that: The positioning device for bridge construction machine comprises: A main body (1) is used to be fixedly arranged on the bridge deck and is located between the two bridge-building machines (6); Two rotating disks (2) are rotatably connected to the main body (1); a plurality of cables (21) are wound around each rotating disk (2) and are arranged at intervals along the axial direction thereof; the plurality of cables (21) on the two rotating disks (2) extend horizontally and are respectively connected to two groups of bridge-building machines (6) to tighten the bridge-building machines (6); a synchronous driving assembly (3) drivingly connected to the two rotating disks (2) so as to be suitable for driving the two rotating disks (2) to rotate in opposite directions; and A locking assembly (4) is arranged on the main body (1) and is used to connect with each of the cables (21); The locking assembly (4) has a locking state and an unlocking state. In the locking state, the locking assembly (4) is connected to each of the cables (21) to limit the extension / retraction of the cables (21).

2. The positioning device for bridge construction as claimed in claim 1, characterized in that: The plurality of cables (21) on one of the turntables (2) correspond one-to-one to the plurality of cables (21) on the other turntable (2); The locking assembly (4) comprises: A plurality of clamping plate groups are arranged on the main body (1) at intervals along the rotation axis of the turntable (2), each of the clamping plate groups comprising two clamping plates (41) connected to the corresponding two cables (21) and slidably connected to the main body (1); adjacent sides of the two clamping plates (41) are provided with grooves (411) for the cables (21) to be embedded, and the grooves (411) are provided with protrusions (412) suitable for connecting with the cables (21); each of the clamping plates (41) is provided with a threaded hole (413), and the thread directions of the two threaded holes (413) on the two clamping plates (41) are opposite; and The driving screw rod (42) is provided with a plurality of threaded portions (421) spaced apart along its axial direction; the plurality of threaded portions (421) correspond to the plurality of threaded holes (413) one by one and are threadedly connected; The driving screw (42) is rotated to drive the two clamping plates (41) in each clamping plate group to move toward or away from each other.

3. The positioning device for bridge construction as claimed in claim 2, characterized in that: A rotating handle (422) is provided at one end of the driving screw rod (42); a fixing nut (423) is sleeved on the driving screw rod (42), the fixing nut (423) is located between the rotating handle (422) and the main body (1), and the fixing nut (423) is threadedly connected to the driving screw rod (42); one end of the fixing nut (423) is suitable for abutting against the main body (1) to fix the driving screw rod (42).

4. The positioning device for bridge construction as claimed in claim 2, characterized in that: A fixing member (5) is also provided between the two clamping plates (41) in each clamping plate group; when the driving screw (42) drives the two clamping plates (41) to move towards each other, the fixing member (5) is suitable for connecting the two clamping plates (41) to limit the movement of the two clamping plates (41).

5. The positioning device for bridge construction as claimed in claim 4, characterized in that: The fixing member (5) comprises: Two clamping rods (51) are respectively arranged on the two clamping plates (41), and the axes of the two clamping rods (51) are parallel; and A clamping plate (52) is arranged on the outer side of the clamping plate (41) and has two clamping grooves (521) for the two clamping rods (51) to be embedded one by one; The end of each of the clamping rods (51) is provided with a baffle (511) suitable for abutting against the clamping plate (52) so as to limit the clamping groove (521) from being separated from the clamping rod (51).

6. The positioning device for bridge construction as claimed in claim 2, characterized in that: Each of the protruding portions (412) has an inclined surface inclined toward the rotating disk (2).

7. The positioning device for bridge construction as claimed in claim 1, characterized in that: The synchronous drive component (3) comprises: A first outer gear ring (31) coaxially sleeved on one of the rotating disks (2); A second outer gear ring (32) is coaxially sleeved on the other rotating disk (2); and A driving motor (33) is arranged on the main body (1); The first outer gear ring (31) is meshingly connected with the second outer gear ring (32), and the output shaft of the drive motor (33) is drivingly connected with one of the turntables (2) so as to be suitable for driving the two turntables (2) to rotate in opposite directions.

8. The positioning device for bridge construction as claimed in claim 1, characterized in that: The main body (1) is provided with a plurality of guide wheels (11) connected one-to-one with the plurality of cables (21); the plurality of guide wheels (11) are all located on the upper side of the turntable (2) so as to enable a section of the cable (21) located between the bridge-building machine (6) and the guide wheels (11) to be in a horizontal state.

9. The positioning device for bridge construction as claimed in claim 8, characterized in that: The main body (1) is provided with a plurality of guide tubes (12) for the plurality of cables (21) to pass through one by one, each of the guide tubes (12) is located between the turntable (2) and the guide wheel (11), and the inner diameter of each guide tube (12) gradually decreases in a direction away from the turntable (2).

10. The positioning device for bridge construction according to claim 1, characterized in that: The turntable (2) further comprises: A plurality of hinged components (22) are respectively arranged between each of the cables (21) and the bridge-building machine (6); two ends of each of the hinged components (22) are respectively fixedly connected to the cables (21) and the bridge-building machine (6), and the axial direction of the rotating shaft of each of the hinged components (22) is parallel to the axial direction of the rotating disk (2).

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