A bridge erecting machine with dynamic balancing function

Abstract

The present invention patent discloses a bridge erection machine with a dynamic balancing function, specifically relating to the technical field of bridge erection devices. It includes a main beam, an intermediate bracket and a rear end bracket, the main beam is slidably connected to a crane, the intermediate bracket is arranged in the middle of the main beam, the rear end bracket is arranged on the rear side of the main beam, the bottom of the intermediate bracket and the rear end bracket are both installed with a driving vehicle, the intermediate bracket and the rear end bracket are connected to the main beam, and the main beam is also provided with a dynamic adjustment mechanism that can provide different reverse support forces according to the different lifting nodes of the beam body. The technical solution of the present invention solves the problem of the bridge erection machine affecting the overall stability when lifting the beam body, and can reduce the impact of uneven gravity distribution inside the bridge erection machine on the overall stability during the beam body lifting process.

Description

Technical Field

[0001] The invention relates to the technical field of bridge erection devices, in particular to a bridge erection machine with a dynamic balancing function. Background Art

[0002] Bridge erection machines are important equipment in road and bridge construction, and are especially indispensable in urban overpasses, highway overpasses, high-speed railways and urban railway bridges.

[0003] Bridge erection machines are divided into transport-erecting machines and transport-erecting split-type bridge erection machines. Among them, the transport-erecting machine uses the same set of equipment to complete beam transportation and bridge erection. The beam body can be hoisted under the main beam of the transport-erecting machine for transportation, and the beam body can be placed in the hole when erecting the bridge. The transport-erecting split-type bridge erection machine cooperates with the beam transport vehicle to complete the erection. Regardless of whether it is an transport-erecting machine or a transport-erecting split-type bridge erection machine, during the process of beam hoisting and erection, the beam body moves on the main beam with the hoisting device on the bridge erection machine, causing the overall center of gravity or main load-bearing point of the bridge erection machine to change continuously, which will affect the stability of the bridge erection machine during long-term use. At the same time, the change of the load-bearing point will affect the overall balance of the bridge erection machine or increase the demand for support force at both ends of the bridge erection machine. Therefore, how to reduce the impact of beam movement on the overall bridge erection machine is an urgent problem to be solved by existing bridge erection machines. Summary of the Invention

[0004] The present invention aims to provide a bridge erection machine with a dynamic balancing function, which solves the problem that the bridge erection machine affects the overall stability when hoisting a beam body.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a bridge-building machine with a dynamic balancing function, comprising a main beam, an intermediate bracket and a rear end bracket, a crane being slidably connected to the main beam, the intermediate bracket being arranged in the middle of the main beam, the rear end bracket being arranged on the rear side of the main beam, a driving vehicle being installed at the bottom of the intermediate bracket and the rear end bracket, the intermediate bracket and the rear end bracket being connected to the main beam, and a dynamic adjustment mechanism being provided on the main beam that can provide different reverse support forces according to the different lifting nodes of the beam body.

[0006] Furthermore, the dynamic adjustment mechanism includes a magnet, multiple electromagnets, a driving gear, multiple first driven gears and multiple second driven gears. The magnet is rotatably connected to the main beam, and the magnet can be rotated to the bottom of the main beam. Multiple electromagnets are arranged at intervals on the main beam, and multiple electromagnets are arranged opposite to the magnet when they are located directly below the main beam. The driving gear is rotatably connected to the top of the crane. Multiple first driven gears and second driven gears are rotatably connected to the top of the main beam. Multiple first driven gears and second driven gears are symmetrically arranged on both sides of the main beam. Each of the first driven gears and second driven gears is located on the motion trajectory of the driving gear and can mesh with the driving gear. Multiple first driven gears and second driven gears are rotatably connected to conductive rods through rotating shafts. The number of conductive rods is twice that of electromagnets. Every two symmetrically arranged conductive rods are connected to corresponding electromagnets through wires. Every two symmetrically arranged conductive rods can contact each other after rotation. The conductive rods on the first driven gear and the second driven gear can provide the electromagnets with currents with opposite flow directions.

[0007] Through the above arrangement, when the crane drives the driving gear to move, the driving gear is sequentially engaged with the first driven gear or the second driven gear at different positions, so that the conductive rods on the first driven gear or the second driven gear are close to each other or separated from each other, so that different electromagnets generate attraction or repulsion on the magnets through different currents, thereby achieving the balance of weight on both sides of the bridge erection machine during the movement of the beam body, which is beneficial to extending the overall service life of the bridge erection machine.

[0008] Furthermore, a pressure sensor is installed on the hoisting part of the crane, and the pressure sensor is electrically connected to a control switch for controlling the connection or disconnection of the circuit where the electromagnet is located.

[0009] Through the above setting, the pressure sensor is used to start the electromagnet through the control switch after receiving the preset pressure, or to turn off the electromagnet through the control switch after releasing the pressure, thereby realizing automatic control, which is conducive to reducing the possibility of human errors and improving construction efficiency.

[0010] Furthermore, all the conductive rods on the first driven gear or the second driven gear have a common sliding frame, and each of the sliding frames is slidably connected to the top of the main beam. A driving motor is also provided at the front end of the main beam, and a threaded rod is connected to the output shaft of the driving motor. The threaded rod is threadedly connected to two limiting rings fixedly connected to the sliding frame.

[0011] Through the above arrangement, the positions of the first driven gear and the second driven gear in the sliding frame can be adjusted with the help of the driving motor, the threaded rod and the limiting ring, thereby providing different supporting forces for beams of different weights, thereby expanding the scope of application of this solution.

[0012] Furthermore, each of the sliding frames is provided with a wiping block located on the motion track of the free end of the corresponding conductive rod.

[0013] Through the above arrangement, the free end of the conductive rod can be wiped after the wiping block contacts the corresponding conductive rod, avoiding the problem of dust on the free end of the conductive rod affecting the power supply effect and maintaining the stability of this solution.

[0014] Compared with the existing technology, this solution has the following beneficial effects:

[0015] This solution can apply different sizes of reverse forces to the main beam during the movement of the beam body, so that the two ends of the bridge-building machine can maintain dynamic stability as much as possible, reducing the process of supporting the front end of the main beam, and also reducing the support force requirements for the rear end bracket, which is conducive to reducing costs or expanding the scope of use of this solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of a bridge erecting machine with a dynamic balancing function according to the present invention;

[0017] Figure 2 It is a top view of a bridge erecting machine with a dynamic balancing function according to the present invention;

[0018] Figure 3 Schematic diagram of the structure of the intermediate bracket in this embodiment;

[0019] Figure 4 It is a cross-sectional view of the sliding frame in this embodiment. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below through specific embodiments:

[0021] The figure marks in the drawings of the specification include: main beam 1, intermediate bracket 2, rear end bracket 3, crane 4, C-shaped frame 5, connecting rod 6, driving vehicle 7, magnet 8, electromagnet 9, driving gear 10, first driven gear 11, second driven gear 12, rotating rod 13, auxiliary support wheel 14, second hydraulic rod 15, sliding frame 16, conductive rod 17, driving motor 18, threaded rod 19, limiting ring 20, wiping block 21, and bridge pier 22.

[0022] Example

[0023] As attached Figures 1 to 4As shown, a bridge erection machine with a dynamic balancing function includes a main beam 1, an intermediate support 2, and a rear end support 3. A crane 4 is slidably connected to the main beam 1. In this embodiment, there are two cranes 4. A pressure sensor is installed on the hoisting part of the crane 4. The pressure sensor is electrically connected to a control switch for controlling the connection or disconnection of the circuit where the electromagnet 9 is located. The pressure sensor is used to energize the electromagnet through the control switch after receiving a preset pressure, or to disconnect the electromagnet through the control switch after releasing the pressure, thereby realizing automatic control, which is conducive to reducing the possibility of human error and improving construction efficiency.

[0024] The middle bracket 2 and the rear end bracket 3 are arranged in sequence from right to left along the length of the main beam 1, with the middle bracket 2 arranged in the middle of the main beam 1 and the rear end bracket 3 arranged on the left side of the main beam 1. The middle bracket 2 and the rear end bracket 3 are each composed of two C-shaped C-shaped frames 5 and a connecting rod 6 fixedly connected to the top of the two C-shaped frames 5. The upper end of each C-shaped frame 5 is bolted to the front and rear sides of the main beam 1, and the two C-shaped frames 5 enclose a space for the beam body and the beam-carrying vehicle to pass through; a driving vehicle 7 is installed at the bottom of each C-shaped frame 5, which can drive the main beam 1 to move; the connecting rod 6 is wrapped around the outside of the main beam 1.

[0025] The main beam 1 is also equipped with a dynamic adjustment mechanism that provides different reverse support forces depending on the beam's position at different lifting nodes. This dynamic adjustment mechanism includes a magnet 8, multiple electromagnets 9, a drive gear 10, multiple first driven gears 11, and multiple second driven gears 12. In this embodiment, there are three electromagnets 9, two drive gears 10, and six first and second driven gears 11, 12. A rotating rod 13 is fixedly connected to the left side of the upper surface of the magnet 8. The rotating rod 13 is rotatably connected to the left side of the main beam 1. The width of the magnet 8 is no greater than the minimum width between the two C-shaped brackets 5, allowing the magnet 8 to face the electromagnet 9 when it is rotated into the rear support 3. An auxiliary support wheel 14 is also fixedly connected to the bottom of the magnet 8. A second hydraulic rod 15 is rotatably connected to the left side of each of the two C-shaped brackets 5 of the rear support 3. The other end of the second hydraulic rod 15 is rotatably connected to the rotating rod 13 via a pin. Three electromagnets 9 are fixedly positioned at intervals on the left side of the main beam 1, each located directly above the two C-shaped brackets 5 in the rear support 3. The two drive gears 10 are both rotatably connected to the top right side of the crane 4 located on the right side via a pin. The six first driven gears 11 and the six second driven gears 12 are both rotatably connected to a sliding frame 16 via a pin. The two sliding frames 16 are both U-shaped. With the help of the sliding frame 16, the conductive rods 17 can be effectively protected, avoiding the impact of severe weather conditions on the conductive rods 17, thereby enhancing the safety and stability of this solution. Each first driven gear 11 and second driven gear 12 is located on the motion trajectory of the drive gear 10 and can mesh with the drive gear 10. A conductive rod 17 is sleeved on the pin of each first driven gear 11 or second driven gear 12. After the two symmetrically arranged conductive rods 17 rotate toward the center of the sliding frame 16, the two conductive rods 17 can offset each other when they are located on the same straight line. Each pair of symmetrically arranged conductive rods 17 is connected to a corresponding electromagnet 9 via an electrical wire. In this embodiment, the electrical wires on the conductive rods 17 on the first driven gear 11 or second driven gear 12 from left to right in the two sliding frames 16 are respectively electrically connected to the three electromagnets arranged sequentially from left to right. That is, the conductive rod 17 on the leftmost first driven gear 11 or second driven gear 12 is connected to the leftmost electromagnet 9 via an electrical wire, and the same applies to the others. When the conductive rods 17 on the first driven gear 11 and the second driven gear 12 offset each other, they can provide the electromagnets 9 with currents flowing in opposite directions, causing the three electromagnets 9 to generate magnetic forces in opposite directions to repel or attract the magnet 8.

[0026] Each sliding frame 16 is slidably connected to the top of the main beam 1. A drive motor 18 is bolted to the right end of the main beam 1. Drive motor 18 is located to the right of the front end. A threaded rod 19 is coaxially connected to the output shaft of drive motor 18. Two retaining rings 20 welded to the sliding frame 16 are threadedly connected to the threaded rod 19. Wiping blocks 21 are attached to the front and rear sides of each sliding frame 16, located along the motion path of the free end of the corresponding conductive rod 17. Wiping blocks 21 wipe the free end of the conductive rod 17, preventing dust from affecting the power supply and maintaining the stability of the solution.

[0027] The working process of this embodiment:

[0028] When the bridge crane is not working, the conductive rods 17 on every two symmetrical first driven gears 11 are against each other, and the conductive rods 17 on every two symmetrical second driven gears 12 are parallel to each other. At this time, the control switch is in the off state, the circuit where the electromagnet 9 is located does not form a path, and the electromagnet 9 does not generate magnetic force.

[0029] When the beam is being erected, the driving vehicle 7 is used to transport the bridge erection machine to the corresponding pier 22. Since the front end of the bridge erection machine (i.e., the right end of the main beam 1) is not provided with a support component for the main beam 1, and the front end of some existing bridge erection machines uses a hydraulic support component to support the bridge erection machine, when the bridge erection machine is moving or preparing, it will be fixed on the corresponding pier 22. Therefore, when the bridge erection machine is erecting the beam, the process is reduced, which is conducive to improving the efficiency of construction. Then, the second hydraulic rod 15 is used to rotate the rotating rod 13 and the magnet 8 out of the rear end bracket 3 to ensure that the magnet 8 does not interfere with the transportation of the beam. Finally, the beam is passed through the space enclosed by the C-shaped frame 5 in the rear end bracket 3 by the camel beam car and transported to the bottom of the crane 4. At this time, the beam is located on the left side of the middle bracket 2. The hoisting part of the crane 4 is connected to the beam, and the magnet 8 is reset by the second hydraulic rod 15.

[0030] After the lifting parts of the two cranes 4 lift the beam, the pressure sensor triggers the control switch to energize the electromagnet 9. The three electromagnets 9 generate a magnetic force opposite to that of the magnet 8, thereby using the magnetic force to reversely support the main beam 1, thereby reducing the bearing capacity of the beam on the left side of the bridge-building machine. As the crane 4 moves, the driving gear 10 on the right crane 4 will mesh with the first driven gear 11 one by one and rotate. When the driving gear 10 drives the first driven gear 11 to rotate, the two symmetrical first driven gears 11 drive the corresponding conductive rods 17 to rotate, so that the circuit of the electromagnet 9 where the two conductive rods 17 are located is disconnected, so that the repulsive force generated by the magnet 8 and all the electromagnets 9 is reduced, and the magnitude of the repulsive force generated by the electromagnet 9 can be adjusted by moving the crane 4, so as to facilitate the load brought to the bridge-building machine when the beam moves on the left side of the intermediate support 2.

[0031] Similarly, when the crane 4 on the right side moves to the second driven gear 12, the driving gear 10 drives the corresponding second driven gear 12 to rotate, so that the corresponding conductive rod 17 rotates toward the center of the sliding frame 16, so that the two conductive rods 17 are offset against each other and the circuit of the corresponding electromagnet 9 is connected. After the circuit of the corresponding electromagnet 9 is connected, the corresponding electromagnet 9 and the magnet 8 are caused to generate a magnetic force of mutual attraction by providing a reverse current, thereby maintaining the main beams 1 on both sides of the intermediate bracket 2 with a mutually balanced load, and maintaining the balance of the entire bridge erection machine. As the two cranes 4 hoist the beam to the right, the increase in the magnetic attraction on the left side can be achieved by gradually connecting the conductive rod 17 on the second driven gear 12, thereby improving the stability of the beam hoisting process.

[0032] After the beam falls onto the corresponding two bridge piers 22 under the lifting of two cranes 4, the pressure of the pressure sensor disappears. At this time, the control switch is triggered by the pressure sensor, and the control switch is used to disconnect the circuit where the electromagnet 9 is located. The magnetic attraction generated by the electromagnet 9 and the magnet 8 disappears, thereby realizing intelligent control.

[0033] According to the weight and length of the beam, the drive motor 18 can be started, and the two sliding frames 16 can be driven to move by the drive motor 18, the threaded rod 19 and the limit ring 20, so as to adjust the specific positions of the first driven gear 11 and the second driven gear 12 in the two sliding frames 16, so that this solution can be applied to the lifting of beams of different weights and lengths.

[0034] The above are only embodiments of the present invention, and common knowledge such as the specific structure and / or characteristics of the scheme are 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 variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A bridge erecting machine with dynamic balancing function, characterized by: It includes a main beam, an intermediate support and a rear end support, the main beam is slidably connected to a lifting vehicle, the intermediate support is arranged in the middle of the main beam, the rear end support is arranged on the rear side of the main beam, the bottom of the intermediate support and the rear end support are both installed with a driving vehicle, the intermediate support and the rear end support are connected to the main beam, and the main beam is also provided with a dynamic adjustment mechanism that can provide different reverse support forces according to the different lifting nodes of the beam body; The dynamic adjustment mechanism includes a magnet, multiple electromagnets, a driving gear, multiple first driven gears and multiple second driven gears. The magnet is rotatably connected to the main beam and can be rotated to the bottom of the main beam. Multiple electromagnets are arranged at intervals on the main beam. Multiple electromagnets are arranged opposite to the magnet when they are located directly below the main beam. The driving gear is rotatably connected to the top of the crane. Multiple first driven gears and second driven gears are rotatably connected to the top of the main beam. Every two first driven gears form a group and every two second driven gears form a group and are symmetrically arranged on both sides of the main beam. Each of the first driven gears and the second driven gear is located on the motion trajectory of the driving gear and can mesh with the driving gear. Multiple first driven gears and second driven gears are rotatably connected to conductive rods through rotating shafts. The number of conductive rods is twice that of electromagnets. Every two symmetrically arranged conductive rods are connected to corresponding electromagnets through wires. Every two symmetrically arranged conductive rods can contact each other after rotation. The conductive rods on the first driven gear and the second driven gear can provide the electromagnets with currents with opposite flow directions.

2. The bridge erecting machine with dynamic balancing function according to claim 1, characterized in that: A pressure sensor is installed on the hoisting part of the crane, and the pressure sensor is electrically connected to a control switch for controlling the connection or disconnection of the circuit where the electromagnet is located.

3. The bridge erecting machine with dynamic balancing function according to claim 1, characterized in that: All the conductive rods on the first driven gear or the second driven gear have a common sliding frame, and each sliding frame is slidably connected to the top of the main beam. A driving motor is also provided at the front end of the main beam, and a threaded rod is connected to the output shaft of the driving motor. The threaded rod is threadedly connected to two limiting rings fixedly connected to the sliding frame.

4. The bridge erecting machine with dynamic balancing function according to claim 3, characterized in that: Each of the sliding frames is provided with a wiping block located on the motion track of the free end of the corresponding conductive rod.

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