Synchronous traction device for bridge swivel

Abstract

The utility model relates to the technical field of bridge construction, and particularly discloses a bridge swivel synchronous traction device which comprises an upper bearing platform, a lower bearing platform and a spherical hinge arranged between the upper bearing platform and the lower bearing platform, a gear ring is fixedly arranged on the side wall of the lower end of the upper bearing platform, the gear ring and the upper bearing platform are both coaxially arranged with the spherical hinge, and rack structures are arranged on the two sides of the gear ring; an auxiliary gear is arranged on the side edge of the gear ring between the two racks, the racks and the auxiliary gear are connected with driving mechanisms respectively, the rotating linear speed of the second auxiliary gear is equal to the moving speed of the racks, and a displacement sensor used for detecting displacement of the upper bearing platform is arranged on the outer side of the upper bearing platform and electrically connected with a communication module. The communication module is in network connection with the main control computer, and the driving mechanism is electrically connected with the main control computer. The utility model aims to solve the problems that a traction system needs to be provided with a plurality of displacement sensors for data acquisition during bridge swivel construction in the prior art, the connection line is complicated, and swivel control of the whole bridge body can be influenced by signal delay of a single sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, and particularly relates to a synchronous traction device for bridge rotation. Background Technique

[0002] Bridge rotation construction refers to a construction method in which a bridge structure is fabricated at a non-design axis position through casting or splicing and then rotated into place. It can convert the operation over obstacles into an operation on the shore or near the ground. According to the rotation direction of the bridge structure, it can be divided into a vertical rotation construction method, a horizontal rotation construction method, and a method combining horizontal rotation and vertical rotation, among which the horizontal rotation method is the most widely used. It is mainly applied to situations where it is impossible to provide supports over valleys, rivers, railways, highways, etc. The rotation system of bridge rotation construction mainly consists of a lower bearing platform, an upper bearing platform, a spherical hinge, a slideway, and a traction system. The existing traction system generally consists of several parts such as steel strands, a continuous traction oil cylinder, a hydraulic pump station, a sensing detection and main control computer, and a BIM wireless monitoring system; the rotation process generally uses jacks to pull the traction cables in opposite directions to form a rotational couple to achieve rotation. Among them, at least two continuous traction oil cylinders are generally provided. Since the two traction oil cylinders mainly control the traction force through control valves and oil pumps, there is a situation where the two traction oil cylinders are not synchronized during the traction process. Therefore, a plurality of displacement sensors need to be arranged around the bridge bearing platform to monitor the displacement of the upper bearing platform at multiple points, so as to ensure the multi-point synchronous rotation of the bridge rotation. To ensure the accuracy of the displacement data acquisition at each point, it is necessary to accurately position the positions of the displacement sensors at each point, which leads to cumbersome positioning when arranging a plurality of displacement sensors on-site. At the same time, when a plurality of displacement sensors are used on-site, they all need to be connected to their respective communication modules, increasing the complexity of on-site wiring; and if the data communication transmission of a certain sensor is delayed, it will affect the synchronous control of the entire traction system. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the technical problem solved by the utility model is to provide a synchronous traction device for bridge rotation, which solves the problems that when constructing the existing bridge rotation, the traction system needs to set a plurality of displacement sensors for data acquisition, the wiring is complex, and the signal delay of a single sensor will affect the rotation control of the entire beam body.

[0004] To solve the above problems, the technical solution adopted by the utility model is as follows: A synchronous traction device for bridge rotation, including an upper bearing platform, a lower bearing platform, and a spherical hinge arranged between the upper and lower bearing platforms. A gear ring is fixedly arranged on the side wall of the lower end of the upper bearing platform. The gear ring and the upper bearing platform are coaxially arranged with the spherical hinge. Rack structures are symmetrically arranged in parallel on both sides of the gear ring, and the racks are meshed with the gear ring. Auxiliary gears are symmetrically arranged on the side of the gear ring between the two parallel racks. The racks are connected with a first driving mechanism, and the first driving mechanism drives the racks on both sides to move in opposite directions. The auxiliary gears are connected with a second driving mechanism, and the second driving mechanism drives the auxiliary gears to rotate. The linear velocity of the rotation of the auxiliary gears is equal to the moving speed of the racks. A displacement sensor for detecting the displacement of the upper bearing platform is arranged outside the upper bearing platform. The displacement sensor is electrically connected to a communication module, and the communication module is network-connected to a main control computer. The first driving mechanism and the second driving mechanism are respectively electrically connected to the main control computer.

[0005] The beneficial effects produced by this solution are as follows: By using a gear ring to replace the existing traction cable, and using racks to cooperate with the driving device to drive the gear ring to rotate, the rotation traction control of the beam body is realized. Due to the cooperation of the gear and the rack, the linear velocity of each point of rotation is the same. Therefore, only one displacement sensor needs to be set to collect the displacement of the entire bridge rotation. The on-site wiring is simple, easy to arrange for construction, and only the data of a single displacement sensor needs to be collected. The acquisition process is relatively simple compared with the existing multiple displacement sensors and is not easily affected.

[0006] By adopting the method of gear meshing, even when over-rotation occurs, it only needs to move back in the reverse direction; it is convenient to use and solves the problem that the existing traction system is not easy to return to position after over-rotation. Secondly, by setting auxiliary gears to provide power synchronously, the stress concentration during gear rotation can be reduced, and at the same time, the driving power of the entire traction device can be improved.

[0007] Furthermore, a plurality of auxiliary gears are provided. The plurality of auxiliary gears are symmetrically distributed on both sides of the gear ring where no racks are installed. The two auxiliary gears located at both ends of the same diameter of the gear ring rotate in opposite directions. By setting a plurality of auxiliary wheels, multi-point synchronous driving of the racks in cooperation with a plurality of auxiliary gears is realized; when driving the gear ring to rotate, the stress distribution at each point is uniform, and the magnitude of the single-point driving stress is reduced.

[0008] Furthermore, the first driving mechanism adopts a jack, and the second driving mechanism adopts a motor. The output shaft of the motor is fixed and coaxially arranged with the auxiliary gear. Different driving mechanisms are used to drive the racks and the gears respectively to ensure the stability of driving.

[0009] Furthermore, the displacement sensor is installed at one end of the rack. Since the driving method through gear meshing makes the rotation speed of each point the same, the displacement sensor is installed at one end of the rack, and measuring the displacement of the rack can obtain the rotation distance of the upper bearing platform.

[0010] Furthermore, the displacement sensor is installed on one side of the upper platform through a bracket, and the bracket is arranged close to the edge of the upper platform. By installing the displacement sensor through the bracket, the position of the displacement sensor can be flexibly adjusted according to measurement needs.

[0011] Furthermore, the bracket includes a base, a vertical rod and a mounting platform which are arranged in sequence from bottom to top. The mounting platform is made of an iron plate. A magnetic table seat is arranged on the mounting platform, and the displacement sensor is arranged in the magnetic table seat. The magnetic table seat is provided to facilitate the installation or removal of the displacement sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A top view of an embodiment.

[0013] Figure 2 A side view of an embodiment.

[0014] Figure 3 This is a schematic diagram of Example 2.

[0015] The figure marks in the drawings of the specification include: upper support platform 1, gear ring 11, rack 12, first drive mechanism 13, auxiliary gear 14, lower support platform 2, ball joint 3, support foot 4, slide 5, displacement sensor 6, magnetic base 61, bracket 62. DETAILED DESCRIPTION

[0016] The following is further described in detail through specific implementation methods:

[0017] Embodiment 1 is basically as attached Figure 1 As shown: a bridge rotation synchronous traction device, including an upper bearing platform, a lower bearing platform 2, and a ball joint 3 arranged between the upper and lower bearing platforms 2, an annular slide 5 coaxial with the upper bearing platform is provided in the lower bearing platform 2, a plurality of supporting legs 4 are provided in the annular slide 5, the plurality of supporting legs 4 are evenly spaced along the circumference of the slide 5, and the supporting legs 4 adopt a steel tube concrete structure; and the diameter of the annular slide 5 is smaller than the diameter of the upper bearing platform.

[0018] A gear ring 11 is fixedly provided on the side wall at the lower end of the upper bearing platform. The gear ring 11 and the upper bearing platform are both coaxially arranged with the spherical hinge 3. Rack structures 12 are symmetrically arranged in parallel on both sides of the gear ring 11. The racks 12 are meshed with the gear ring 11. Auxiliary gears 14 are symmetrically arranged on the side of the gear ring 11 between the two parallel racks 12. The racks 12 are connected with a first driving mechanism 13, and the first driving mechanism 13 drives the two side racks 12 to move in opposite directions. The auxiliary gears 14 are connected with a second driving mechanism, and the second driving mechanism drives the auxiliary gears 14 to rotate. The linear velocity of the rotation of the auxiliary gears 14 is equal to the moving speed of the racks 12. A displacement sensor 6 for detecting the displacement of the upper bearing platform is arranged outside the bearing platform. The displacement sensor 6 is electrically connected to a communication module, and the communication module is network-connected to a main control computer. The first driving mechanism 13 and the second driving mechanism are respectively electrically connected to the main control computer. The main control computer is not shown in the figure.

[0019] The first driving mechanism 13 adopts a jack, and the second driving mechanism adopts a motor. The output shaft of the motor is fixed and coaxially arranged with the auxiliary gear 14. There are multiple auxiliary gears 14, and the multiple auxiliary gears 14 are symmetrically distributed on both sides of the gear ring 11 where the racks 12 are not installed. The rotation directions of the two auxiliary gears 14 located at both ends of the same diameter of the gear ring 11 are opposite. In this embodiment, there are two auxiliary gears 14.

[0020] The displacement sensor 6 is installed at one end of the rack 12. Since the driving method through gear meshing makes the rotation speed of each point consistent, the displacement sensor 6 is installed at one end of the rack 12, and measuring the displacement of the rack 12 can obtain the rotation distance of the upper bearing platform; there is no need to additionally set up a bracket 62 for installation.

[0021] Embodiment 2 is as Figure 3 shown. The same parts as those in Embodiment 1 will not be described in detail. The differences are as follows: The displacement sensor 6 is installed on one side of the upper bearing platform through a bracket 62, and the bracket 62 is arranged close to the edge of the upper bearing platform; The support includes a base, a vertical rod, and a mounting table arranged in sequence from bottom to top. A magnetic base 61 is provided on the mounting table, and the displacement sensor 6 is arranged inside the magnetic base 61.

[0022] The above are only embodiments of the present invention. Common knowledge such as specific structures and characteristics known in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.

Claims

1. A synchronous traction device for bridge rotation, comprising an upper bearing platform, a lower bearing platform, and a ball joint arranged between the upper and lower bearing platforms, characterized in that: A gear ring is fixedly provided on the side wall of the lower end of the upper supporting platform, and the gear ring and the upper supporting platform are coaxially arranged with the ball joint. Rack structures are symmetrically provided on both sides of the gear ring in parallel, and the racks are meshed with the gear ring; auxiliary gears are symmetrically provided on the sides of the gear ring between the two parallel racks, and the racks are connected to the first driving mechanism, and the first driving mechanism drives the racks on both sides to move in opposite directions; the auxiliary gear is connected to the second driving mechanism, and the second driving mechanism drives the auxiliary gear to rotate, and the linear speed of the auxiliary gear rotation is equal to the moving speed of the rack. A displacement sensor for detecting the displacement of the upper supporting platform is provided on the outer side of the upper supporting platform, and the displacement sensor is electrically connected to the communication module, and the communication module is connected to the main control computer network, and the first driving mechanism and the second driving mechanism are respectively electrically connected to the main control computer.

2. A bridge rotation synchronous traction device according to claim 1, characterized in that: There are multiple auxiliary gears, which are symmetrically distributed on both sides of the gear ring where the rack is not installed, and the two auxiliary gears located at the two ends of the same diameter of the gear ring rotate in opposite directions.

3. A bridge rotating synchronous traction device according to claim 1, characterized in that: The first driving mechanism adopts a jack, and the second driving mechanism adopts a motor, and the output shaft of the motor is fixed and coaxial with the auxiliary gear.

4. A bridge rotating synchronous traction device according to claim 1, characterized in that: The displacement sensor is installed at one end of the rack.

5. The bridge rotating synchronous traction device according to claim 1, characterized in that: The displacement sensor is installed on one side of the upper platform through a bracket, and the bracket is arranged close to the edge of the upper platform.

6. A bridge rotating synchronous traction device according to claim 5, characterized in that: The bracket comprises a base, a vertical pole and a mounting platform which are arranged in sequence from bottom to top. A magnetic table seat is arranged on the mounting platform, and the displacement sensor is arranged in the magnetic table seat.

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