A bridge precast main beam installation device

Abstract

This invention relates to the field of bridge erection equipment technology, specifically to a precast bridge main beam installation device, comprising a truss and a stabilizing plate. The upper part of the truss has slide rails on both sides, and two beam-transporting trolleys slide on the slide rails. Each beam-transporting trolley is equipped with a traverse vehicle, and each traverse vehicle has a drive system connected to a lifting device. An installation box is installed at the lower end of the lifting device. Two sliders slide on the installation box, and each slider is hinged to a connecting rod, the lower ends of which are hinged to the stabilizing plate. The installation box contains a locking mechanism to lock the two sliders, which are slidably disposed within the installation box. Guide columns are fixed on both sides of the installation box, and each guide column passes through and slidably connects to the two sliders. In this invention, after lifting, the two stabilizing plates automatically abut against the upper ends of the precast beam, restraining the precast beam and preventing overturning or swaying during lifting.

Description

Technical Field

[0001] This invention relates to the field of bridge erection equipment technology, and in particular to a bridge precast main beam installation device. Background Technology

[0002] The installation of bridge main beams currently relies mainly on bridge erecting machines. Bridge erecting machines fall under the category of cranes because their main function is to lift the beams, transport them to the designated location, and then lower them. Bridge erecting machines differ significantly from cranes in the general sense, as they require stringent conditions and involve traveling on the beams, or longitudinal movement. Bridge erecting machines are used for erecting highway bridges, conventional railway bridges, and high-speed passenger railway bridges, among others.

[0003] During bridge erection, two cranes are typically used to lift the precast beams to the upper part of the piers, where a bridge erecting machine then takes over to move and adjust their position horizontally before finally lowering them to complete the process.

[0004] When existing bridge erecting machines lift precast beams, steel cables are typically attached to both ends of the precast beam, and then the drive system lifts the steel cables at both ends to raise it. However, when the precast beam is lifted and moved for adjustment, it may flip over because it is supported by steel cables, causing the precast beam to be unable to maintain a horizontal state. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a bridge precast main beam installation device to solve the problem that the precast beam may sway and become unstable after the existing bridge erecting machine has been used to install the precast beam.

[0006] To achieve the above objectives, the present invention provides a precast bridge main beam installation device.

[0007] A bridge precast main beam installation device includes a truss and a stabilizing plate. The upper part of the truss has slide rails on both sides. Two beam transport trolleys slide on the slide rails. Each beam transport trolley is equipped with a transverse trolley. Each transverse trolley is equipped with a drive system. The drive system is connected to a lifting device. An installation box is installed at the lower end of the lifting device. Two sliders slide on the installation box. Each slider is hinged with a connecting rod. The lower ends of the two connecting rods are hinged to the stabilizing plate. The installation box is equipped with a locking mechanism to lock the two sliders.

[0008] Furthermore, the sliders are all slidably disposed inside the mounting box, and guide posts are fixed on both sides of the mounting box. The guide posts pass through the two sliders and are slidably connected to them.

[0009] Furthermore, the bottom of the mounting box has a slot, through which both connecting rods pass.

[0010] Furthermore, the locking mechanism includes a connecting block, the upper part of the mounting box has a rectangular opening, the connecting block is slidably inserted into the rectangular opening, the upper end of the connecting block is connected to the lifting device, the lower end of the connecting block is provided with a sliding column, the lower ends of the sliding column are fixed with racks on both sides, the bottom of the slider is provided with toothed grooves on both sides, and the racks are adapted to the toothed grooves.

[0011] Furthermore, guide rods are installed on both sides of the connecting block, both guide rods are inclined and symmetrically arranged, and connecting rods are fixed on the upper part of the slider, and the two connecting rods are slidably connected to the two guide rods respectively.

[0012] Furthermore, a movable frame is movably sleeved on the connecting block, and two guide rods are respectively fixed on both sides of the movable frame. Limiting grooves are opened on both sides of the connecting block, and limiting protrusions are integrally formed on both sides of the inner wall of the movable frame. The two limiting protrusions are slidably disposed in the two limiting grooves. Guide pins are fixed in the limiting grooves, and the guide pins pass through the limiting protrusions and are slidably connected to them. A first spring is sleeved on the lower end of each guide pin.

[0013] Furthermore, a circular groove is formed in the connecting block, and a limiting block is slidably provided in the circular groove. The upper end of the sliding column extends into the circular groove and is fixedly connected to the limiting block. A second spring is sleeved on the upper end of the sliding column.

[0014] Furthermore, each of the guide rods has a sliding groove, the upper end of the connecting rod passes through the sliding groove, and a guide wheel is installed on the upper end of each connecting rod, with the guide wheel rolling on the upper part of the guide rod.

[0015] Furthermore, a fixed limiting frame is fitted onto the connecting block.

[0016] Furthermore, hooks are fixed on both sides of the upper part of the mounting box. The hooks are used to hang the two ends of the steel cable, and the steel cable supports the precast beam.

[0017] The beneficial effects of this invention are:

[0018] This invention, through the installation box and stabilizing plate, along with the locking mechanism, allows the precast beam to be lifted using two lifting devices and two steel cables. Due to the relative sliding between the connecting block and the installation box, the lifting devices pull the connecting block upwards first, causing the two sliders to move closer together and push the stabilizing plate downwards until it presses firmly against the surface of the precast beam. After contact, the moving frame can compress the first spring and slide down the connecting block. At this time, the connecting block continues to move upwards, driving the two racks upwards through the sliding column until they engage with the toothed grooves at the bottom of the sliders, positioning the two sliders and ensuring the stabilizing plate is firmly pressed against the precast beam. In this device, the two stabilizing plates press firmly against the upper ends of the precast beam, restricting the beam and preventing it from tipping or shaking during lifting. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention;

[0021] Figure 2 This is a three-dimensional schematic diagram of another aspect of an embodiment of the present invention;

[0022] Figure 3 This is a three-dimensional schematic diagram of the mobile lifting mechanism according to an embodiment of the present invention;

[0023] Figure 4 This is a three-dimensional sectional view of the mounting box according to an embodiment of the present invention;

[0024] Figure 5 This is a three-dimensional schematic diagram of the internal mechanism of the mounting box according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic cross-sectional view of the connecting block according to an embodiment of the present invention;

[0026] Figure 7 This is a three-dimensional schematic diagram of the guide rod according to an embodiment of the present invention;

[0027] Figure 8 This is a three-dimensional schematic diagram of the slider according to an embodiment of the present invention.

[0028] The diagram is marked as follows:

[0029] 1. Truss; 2. Beam transport trolley; 3. Drive system; 4. Lifting device; 5. Mounting box; 6. Stabilizing plate; 7. Connecting block; 8. Connecting rod; 9. Guide rod; 10. Slider; 11. Guide column; 12. Rack; 13. Guide wheel; 14. Tooth groove; 15. Limiting frame; 16. Moving frame; 17. Limiting protrusion; 18. First spring; 19. Guide pin; 20. Slide groove; 21. Limiting block; 22. Second spring; 23. Sliding column; 24. Connecting rod. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0031] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] like Figures 1-8 As shown, a bridge precast main beam installation device includes a truss 1 and a stabilizing plate 6. The upper two sides of the truss 1 have slide rails, and two beam transport trolleys 2 are slidably mounted on the slide rails. Each beam transport trolley 2 is equipped with a transverse trolley, and each transverse trolley is equipped with a drive system 3. The drive system 3 is connected to a lifting device 4. An installation box 5 is installed at the lower end of the lifting device 4. Two sliders 10 slide on the installation box 5. Each slider 10 is hinged with a connecting rod 8, and the lower ends of the two connecting rods 8 are hinged to the stabilizing plate 6. The installation box 5 is equipped with a locking mechanism to lock the two sliders 10. Hooks are fixed on both sides of the upper part of the installation box 5. The hooks are used to hang the two ends of steel cables, and the steel cables lift the precast beam.

[0033] The sliders 10 are all slidably disposed inside the mounting box 5. Guide posts 11 are fixed on both sides of the mounting box 5. The guide posts 11 pass through the two sliders 10 and are slidably connected to them.

[0034] The bottom of the mounting box 5 has a strip groove, through which both connecting rods 8 pass. The locking mechanism includes a connecting block 7. The upper part of the mounting box 5 has a rectangular opening, and the connecting block 7 is slidably inserted into the rectangular opening. A limit frame 15 is fixedly fitted on the connecting block 7. The upper end of the connecting block 7 is connected to the lifting device 4. The lower end of the connecting block 7 is provided with a sliding column 23. Both sides of the lower end of the sliding column 23 are fixed with racks 12. Both sides of the bottom of the slider 10 have toothed grooves 14, and the racks 12 and toothed grooves 14 are adapted to each other.

[0035] Guide rods 9 are installed on both sides of the connecting block 7. The two guide rods 9 are inclined and symmetrical. Connecting rods 24 are fixed on the upper part of the slider 10. The two connecting rods 24 are slidably connected to the two guide rods 9 respectively. The guide rods 9 are all opened with sliding grooves 20. The upper end of the connecting rod 24 passes through the sliding groove 20. The upper end of the connecting rod 24 is installed with guide wheels 13. The guide wheels 13 roll on the upper part of the guide rods 9. After the lifting device 4 lifts, it pulls the connecting block 7 to move upward first. The two guide rods 9 follow and move upward. The guide wheels 13 squeeze the two sliders 10 to bring them closer together, so that the upper ends of the two connecting rods 8 come together, pushing the stabilizing plate 6 to move downward until it is pressed against the surface of the precast beam.

[0036] A movable frame 16 is movably fitted onto the connecting block 7. Two guide rods 9 are fixed to the two sides of the movable frame 16 respectively. Limiting grooves are opened on both sides of the connecting block 7. Limiting protrusions 17 are integrally formed on the inner walls of both sides of the movable frame 16. The two limiting protrusions 17 are slidably disposed in the two limiting grooves respectively. Guide pins 19 are fixed in the limiting grooves, and the guide pins 19 pass through the limiting protrusions 17 and are slidably connected to them. A first spring 18 is fitted on the lower end of each guide pin 19. The movable frame 16 can compress the first spring 18 and slide down the connecting block. At this time, the connecting block 7 continues to move upward, driving the two racks 12 to move upward through the sliding column 23 until they engage with the tooth groove 14 at the bottom of the slider 10, thereby positioning the two sliders 10.

[0037] A circular groove is opened in the connecting block 7, and a limiting block 21 is slidably provided in the circular groove. The upper end of the sliding column 23 extends into the circular groove and is fixedly connected to the limiting block 21. A second spring 22 is sleeved on the upper end of the sliding column 23.

[0038] Working principle: In use, steel cables are first fitted onto both ends of the precast beam, and then the two ends of the steel cables are fitted onto the hooks on both sides of the mounting box 5. Then the drive system 3 is lifted. The precast beam is lifted by two lifting devices 4 and two steel cables. Due to the relative sliding between the connecting block 7 and the mounting box 5, the lifting device 4 pulls the connecting block 7 to move upward first. The two guide rods 9 follow and move upward. The guide wheel 13 squeezes and makes the two sliders 10 come closer to each other, so that the upper ends of the two connecting rods 8 come together and push the stabilizing plate 6 to move downward until it is pressed against the surface of the precast beam. After the contact is tight, the moving frame 16 can compress the first spring 18 and slide down the connecting block. At this time, the connecting block 7 continues to move upward and drives the two racks 12 to move upward through the sliding column 23 until they mesh with the tooth groove 14 at the bottom of the slider 10, positioning the two sliders 10 and making the stabilizing plate 6 firmly pressed against the precast beam.

Claims

1. A bridge precast main beam installation device, comprising a truss (1) and a stabilizing plate (6), characterized in that, The upper sides of the truss (1) are equipped with slide rails, and two beam transport trolleys (2) are slidably mounted on the slide rails. Each beam transport trolley (2) is equipped with a transverse trolley, and each transverse trolley is equipped with a drive system (3). The drive system (3) is connected to a lifting device (4). An installation box (5) is installed at the lower end of the lifting device (4). Two sliders (10) slide on the installation box (5). Each slider (10) is hinged with a connecting rod (8), and the lower ends of the two connecting rods (8) are hinged to a stabilizing plate (6). The installation box (5) is equipped with a locking mechanism to lock the two sliders (10). The locking mechanism includes a connecting block (7), the upper part of the mounting box (5) has a rectangular opening, the connecting block (7) is slidably inserted into the rectangular opening, the upper end of the connecting block (7) is connected to the lifting device (4), the lower end of the connecting block (7) is provided with a sliding column (23), the lower ends of the sliding column (23) are fixed with racks (12) on both sides, the bottom sides of the slider (10) are provided with toothed grooves (14), and the racks (12) are adapted to the toothed grooves (14); Guide rods (9) are installed on both sides of the connecting block (7). The two guide rods (9) are inclined and symmetrical. The upper part of the slider (10) is fixed with connecting rods (24), and the two connecting rods (24) are slidably connected to the two guide rods (9). A movable frame (16) is movably sleeved on the connecting block (7). Two guide rods (9) are fixed on both sides of the movable frame (16). Limiting grooves are opened on both sides of the connecting block (7). Limiting protrusions (17) are integrally formed on both sides of the inner wall of the movable frame (16). The two limiting protrusions (17) are slidably disposed in the two limiting grooves. Guide pins (19) are fixed in the limiting grooves. The guide pins (19) pass through the limiting protrusions (17) and are slidably connected to them. A first spring (18) is sleeved on the lower end of the guide pins (19).

2. The bridge precast main beam installation device according to claim 1, characterized in that, The sliders (10) are all slidably disposed inside the mounting box (5). Guide posts (11) are fixed on both sides of the mounting box (5). The guide posts (11) pass through the two sliders (10) and are slidably connected to them.

3. The bridge precast main beam installation device according to claim 2, characterized in that, The bottom of the mounting box (5) has a strip groove, and both connecting rods (8) pass through the strip groove.

4. The bridge precast main beam installation device according to claim 1, characterized in that, The connecting block (7) has a circular groove, and a limiting block (21) is slidably provided in the circular groove. The upper end of the sliding column (23) extends into the circular groove and is fixedly connected to the limiting block (21). A second spring (22) is sleeved on the upper end of the sliding column (23).

5. The bridge precast main beam installation device according to claim 1, characterized in that, Each guide rod (9) has a groove (20) and the upper end of the connecting rod (24) passes through the groove (20). Each connecting rod (24) has a guide wheel (13) installed on its upper end and the guide wheel (13) rolls on the upper part of the guide rod (9).

6. The bridge precast main beam installation device according to claim 1, characterized in that, A fixed limit frame (15) is fitted onto the connecting block (7).

7. The bridge precast main beam installation device according to claim 1, characterized in that, The mounting box (5) has fixed hooks on both sides of the upper part. The hooks are used to hang the two ends of the steel cable, and the steel cable supports the precast beam.

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