Broadening excavation equipment for river channel below existing bridge and construction method

Abstract

The invention discloses widening excavation equipment for a river channel below an existing bridge and a construction method.The widening excavation equipment for the river channel below the existing bridge comprises a fixed frame and a movable frame, the fixed frame is installed on a floating boat, a first telescopic piece is arranged in the floating boat in the vertical direction, the movable end of the first telescopic piece is connected with the fixed frame, and the movable frame slides on the fixed frame; the fixed frame is provided with a second telescopic piece, the movable end of the second telescopic piece is connected with the movable frame, the movable frame is connected with a crushing assembly and a broken stone conveying assembly, the crushing assembly crushes reefs and conveys generated broken stones to the broken stone conveying assembly, and the broken stone conveying assembly conveys the broken stones to the floating boat. Adjustment of the crushing assembly in the height direction and the front-back direction is achieved through the first telescopic part and the second telescopic part correspondingly, then reef crushing is facilitated, meanwhile, crushed stones are conveyed to the floating boat through the crushed stone conveying assembly to be treated conveniently, work in a narrow space is facilitated, and meanwhile the good destroying capacity can be achieved for the reef.

Description

Equipment and construction method for widening and excavating river channels under existing bridges Technical Field

[0001] This application relates to the field of river widening and excavation technology, and in particular to a device and construction method for widening and excavating a river channel under an existing bridge. Background Technology

[0002] River widening projects are flood control and disaster reduction projects implemented to increase the flood discharge capacity of rivers and lower flood levels. They primarily address flooding and ice jam threats caused by poor drainage in congested river sections by widening the river's cross-section. This project is suitable for plain river sections with excessively narrow dike spacing or topographical limitations. It expands the flood channel by retreating dikes on both banks or one side, ensuring that the widened dike spacing matches the upstream and downstream water discharge capacity.

[0003] During construction, it was necessary to excavate under the bridge, which was located beneath reefs. Due to space constraints, traditional excavators were unable to adapt. Summary of the Invention

[0004] The purpose of this application is to provide equipment and construction method for widening and excavating river channels under existing bridges, so as to solve the problem that traditional excavators are difficult to excavate reefs under bridges.

[0005] In a first aspect, this application provides a river widening and excavation equipment under an existing bridge, which adopts the following technical solution: A river widening and excavation equipment under an existing bridge includes a fixed frame and a movable frame. The fixed frame is installed on a floating boat. A first telescopic member is provided in the floating boat along the vertical direction. The movable end of the first telescopic member is connected to the fixed frame. The movable frame slides on the fixed frame. A second telescopic member is installed on the fixed frame. The movable end of the second telescopic member is connected to the movable frame. A crushing component and a crushed stone conveying component are connected to the end of the movable frame away from the fixed frame. The crushing component crushes the rocks and conveys the resulting crushed stone to the crushed stone conveying component. The crushed stone conveying component conveys the crushed stone to the floating boat.

[0006] By adopting the above technical solution, the height and forward / backward directions of the crushing component can be adjusted by the first and second telescopic components respectively, which facilitates the crushing of the reef. At the same time, the crushed stone is transported to the floating boat by the stone conveying component for processing. Compared with the traditional excavator solution, it is easier to work in a confined space and has a better destructive ability against the reef.

[0007] Optionally, the crushing assembly includes a first drive component and a crushing disc, wherein the first drive component is mounted on a movable frame and the output end of the first drive component is connected to the crushing disc.

[0008] Optionally, the crushing disc includes a cutter holder and a cutter bar. The cutter holder is connected to the output end of the first drive member. The cutter bars are arranged on the side wall of the cutter holder and are arranged in multiple arrays along the circumference of the cutter holder. Each cutter bar is provided with an inclined blade. The inclined blade is inclined toward the rotation direction of the cutter holder so that when the cutter holder rotates, the crushed stone cut by the inclined blade is thrown toward the crushed stone conveying assembly.

[0009] The above technical solution allows the inclined blade to easily crush rocks, and at the same time, the inertial force generated by the rotation of the blade holder can be used to throw the crushed rocks to the crushed rock conveying component, which facilitates the collection of crushed rocks and thus facilitates the processing of crushed rocks.

[0010] Optionally, the crushed stone conveying assembly includes a first conveyor belt and a second conveyor belt. The first conveyor belt is mounted on a movable frame to receive crushed stone thrown by inclined blades and convey the crushed stone to the second conveyor belt. One end of the second conveyor belt is mounted on the movable frame, and the other end is mounted on a fixed frame to receive the crushed stone conveyed by the first conveyor belt and convey it to the floating vessel.

[0011] The above technical solution first uses a first conveyor belt to receive the crushed stone thrown by the inclined blades, then the first conveyor belt transports the crushed stone to a second conveyor belt, and then the second conveyor belt transports the crushed stone to a floating vessel, thus realizing automatic collection of crushed stone and improving construction efficiency.

[0012] Optionally, the second conveyor belt includes a first conveyor roller, a second conveyor roller, a conveyor belt, and an adjusting roller. The first conveyor roller is rotatably connected to a fixed frame, and the second conveyor roller is rotatably connected to a movable frame. The conveyor belt is fitted onto the first conveyor roller, the second conveyor roller, and the adjusting roller. Two fixed plates are fixedly connected to the fixed frame, and a sliding plate is fixedly connected to each fixed plate. A slider slides on each sliding plate. The adjusting roller is rotatably connected between the two sliders. A guide rod is connected to each slider. The end of the guide rod away from the slider passes through the fixed plate and is connected to an anti-detachment block. A compression spring is fitted on the guide rod. One end of the compression spring abuts against the slider, and the other end abuts against the fixed plate.

[0013] By adopting the above technical solution, when the crushing component needs to be fed, the position of the movable frame needs to be moved a small distance. At this time, the position between the first conveyor roller and the second conveyor roller will also change accordingly. At this time, by adjusting the roller and the pressure spring, the distance between the first conveyor roller and the second conveyor roller can be adapted to the change, and the conveyor belt can always be kept in a taut state so that the conveyor belt can maintain a good working condition.

[0014] Optionally, a second driving component is fixedly connected to the slider, the movable end of the second driving component is connected to the adjusting roller, a clamping plate is fixedly connected to the adjusting roller, and the conveyor belt passes between the clamping plate and the adjusting roller.

[0015] By adopting the above technical solution, when the movable frame is fully retracted, the movable frame moves a greater distance than when the crushing component is working, and the adjusting roller cannot adapt. Therefore, the adjusting roller is driven to rotate by the second driving component, and then part of the conveyor belt is wound onto the adjusting roller through the cooperation of the clamp and the adjusting roller, so that the conveyor belt remains taut even when not in operation, which facilitates the transfer or transportation of the conveyor belt.

[0016] Optionally, a tension roller is rotatably connected to the fixed frame, the tension roller abuts against the outer side of the conveyor belt, and the tension roller is higher than the adjusting roller and lower than the first conveying roller.

[0017] By using the above technical solution, the tension roller is attached to the outer side of the conveyor belt, which ensures that the conveyor belt has a large wrap angle with both the first conveyor roller and the adjusting roller, thereby ensuring the friction between the first conveyor roller, the adjusting roller and the conveyor belt.

[0018] Optionally, a discharge track is connected to the fixed frame, a collection box is installed on the floating boat, one end of the discharge channel is located below the discharge end of the second conveyor belt, and the other end is located above the collection box.

[0019] By adopting the above technical solution, the crushed stone can be easily transferred from the second conveyor belt to the collection box via the discharge track, which facilitates the collection of the crushed stone.

[0020] Optionally, the movable frame is provided with a shock-absorbing rubber pad at the end away from the fixed frame, and the shock-absorbing rubber pad is located above the movable frame.

[0021] Optionally, the anti-collision rubber pack is provided with a damper, and multiple sets of dampers are provided along the length of the movable frame, with multiple dampers in each set along the width of the movable frame.

[0022] The above technical solution, through the combination of dampers and anti-collision rubber pads, can reduce the vibration when the movable frame collides with the bridge, thereby reducing the possibility of damage to the bridge.

[0023] Secondly, this application discloses a construction method.

[0024] A construction method, based on the aforementioned equipment for widening and excavating a river channel under an existing bridge, includes the following steps: S1, a first telescopic component drives a fixed frame to move to a set height; S2, a second telescopic component drives a movable frame to move, causing a crushing component to move to a set position; S3, the second telescopic component drives the movable frame to continue moving, the crushing component crushes the rocks, and the crushed rocks are transported to a crushed rock conveying component, which then transports the crushed rocks to a floating platform; S4, the above steps are repeated until the rocks are completely processed.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The height and forward / backward directions of the crushing component are adjusted by the first and second telescopic components respectively, facilitating the crushing of reefs. Simultaneously, the crushed stone is transported to the floating platform via the stone conveying component for processing. Compared to traditional excavator solutions, this allows for easier operation in confined spaces while providing better destructive power against reefs; 2. The inclined blades facilitate the crushing of reefs and, with the inertial force generated by the rotation of the blade holder, throw the stone towards the stone conveying component, facilitating stone collection and processing; 3. The first conveyor belt receives the stone thrown by the inclined blades, then conveys it to the second conveyor belt, which then transports it to the floating platform, achieving automatic stone collection and improving construction efficiency; 4. When the crushing component needs to be fed, the position of the movable frame needs to be moved a small distance, and the position between the first and second conveyor rollers changes accordingly. 5. When the movable frame is fully retracted, its movement distance is greater than that of the crushing components during operation, which the adjusting roller cannot accommodate. Therefore, the second drive unit drives the adjusting roller to rotate, and the clamping plate, in conjunction with the adjusting roller, winds part of the conveyor belt onto the adjusting roller, keeping the conveyor belt taut even when not in operation, facilitating conveyor belt transfer or transportation. 6. By having the tensioning roller adhere to the outer side of the conveyor belt, a large wrap angle is ensured between the conveyor belt and both the first and adjusting rollers, thus maintaining friction between the first and adjusting rollers and the conveyor belt. 7. The discharge track facilitates the transfer of crushed stone from the second conveyor belt to the collection box, making crushed stone collection easier. 8. The combination of the damper and the anti-collision rubber pad reduces vibration when the movable frame collides with the bridge, minimizing the possibility of damage to the bridge. Attached Figure Description

[0026] Figure 1 is a schematic diagram illustrating the overall structure of the river widening and excavation equipment in this invention.

[0027] Figure 2 is a schematic diagram illustrating the structure of the second conveyor belt in this invention.

[0028] Figure 3 is a schematic diagram illustrating the clamping plate in this invention.

[0029] In the diagram, 1. Floating boat; 11. Collection box; 2. Fixed frame; 21. Second telescopic component; 22. Discharge track; 3. Movable frame; 31. Anti-collision rubber pack; 4. Crushing assembly; 41. First drive component; 42. Knife holder; 43. Guide rod; 44. Inclined blade; 5. First conveyor belt; 6. Second conveyor belt; 61. First conveyor roller; 62. Second conveyor roller; 63. Conveyor belt; 64. Adjusting roller; 65. Tensioning roller; 66. Fixed plate; 661. Slide plate; 662. Slider; 663. Guide rod; 664. Compression spring; 67. Second drive component; 68. Clamping plate. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] In a first aspect, this application discloses a device for widening and excavating a river channel beneath an existing bridge.

[0033] A river widening and excavation device under an existing bridge, as shown in Figures 1 to 3, includes a fixed frame 2 and a movable frame 3. The fixed frame 2 is installed on a floating boat 1. A first telescopic component is installed vertically inside the floating boat 1, and the movable end of the first telescopic component is connected to the fixed frame 2. The movable frame 3 slides on the fixed frame 2. A second telescopic component 21 is installed on the fixed frame 2, and the movable end of the second telescopic component 21 is connected to the movable frame 3. A crushing component and a crushed stone conveying component are connected to the end of the movable frame 3 away from the fixed frame 2. The crushing component crushes the rocks and conveys the resulting crushed stone to the crushed stone conveying component, which then conveys the crushed stone to the floating boat 1. During construction, the height and forward / backward directions of the crushing component can be adjusted by the first telescopic component and the second telescopic component 21, respectively, to facilitate the crushing of the rocks. At the same time, the crushed stone is conveyed to the floating boat 1 by the crushed stone conveying component for processing. Compared with traditional excavator solutions, this device is easier to operate in confined spaces and has better destructive power against rocks.

[0034] Specifically, the crushing assembly includes a first drive unit 41 and a crushing disc. The first drive unit 41 is mounted on the movable frame 3, and its output end is connected to the crushing disc. The crushing disc includes a cutter holder 42 and cutter bars. The cutter holder 42 is connected to the output end of the first drive unit 41. Multiple cutter bars are arranged on the side wall of the cutter holder 42 in a circumferential array. Each cutter bar has an inclined blade 44, which is inclined towards the rotation direction of the cutter holder 42, so that when the cutter holder 42 rotates, the crushed stone cut by the inclined blade 44 is thrown towards the crushed stone conveying assembly. The inclined blade 44 facilitates the crushing of rocks and, with the help of the inertial force generated by the rotation of the cutter holder 42, throws the crushed stone towards the crushed stone conveying assembly, facilitating the collection and processing of the crushed stone. The first drive unit 41 can be a stepper motor.

[0035] The crushed stone conveying assembly includes a first conveyor belt 5 and a second conveyor belt 6. The first conveyor belt 5 is mounted on a movable frame 3 and is used to receive the crushed stone thrown by the inclined blades 44 and convey it to the second conveyor belt 6. One end of the second conveyor belt 6 is mounted on the movable frame 3, and the other end is mounted on a fixed frame 2 to receive the crushed stone conveyed by the first conveyor belt 5 and convey it to the floating boat 1. The first conveyor belt 5 first receives the crushed stone thrown by the inclined blades 44, then conveys it to the second conveyor belt 6, and finally conveys it to the floating boat 1, achieving automatic collection of the crushed stone and improving construction efficiency.

[0036] The second conveyor belt 6 includes a first conveyor roller 61, a second conveyor roller 62, a conveyor belt 63, and an adjusting roller 64. The first conveyor roller 61 is rotatably connected to the fixed frame 2, and the second conveyor roller 62 is rotatably connected to the movable frame 3. The conveyor belt 63 is fitted onto the first conveyor roller 61, the second conveyor roller 62, and the adjusting roller 64. Two fixed plates 66 are fixedly connected to the fixed frame 2. A sliding plate 661 is fixedly connected to each fixed plate 66, and a slider 662 slides on each sliding plate 661. The adjusting roller 64 is rotatably connected between the two sliders 662. A guide rod 663 is connected to the slider 662. One end of the guide rod 663 away from the slider 662 passes through the fixed plate 66 and is connected to an anti-detachment block. A compression spring 664 is fitted onto the guide rod 663. One end of the compression spring 664 abuts against the slider 662, and the other end abuts against the fixed plate 66. When the crushing component needs to be fed, the position of the movable frame 3 needs to be moved a small distance. At this time, the position between the first conveying roller 61 and the second conveying roller 62 will also change accordingly. At this time, by adjusting the roller 64 and the pressure spring 664, the distance between the first conveying roller 61 and the second conveying roller 62 can be adapted, and the conveyor belt 63 can always be kept in a taut state so that the conveyor belt 63 can maintain a good working condition.

[0037] More specifically, a second driving component 67 is fixedly connected to the slider 662. The movable end of the second driving component 67 is connected to the adjusting roller 64. A clamping plate 68 is fixedly connected to the adjusting roller 64, and the conveyor belt 63 passes between the clamping plate 68 and the adjusting roller 64. When the movable frame 3 is fully retracted, its movement distance is greater than that of the crushing component during operation, which the adjusting roller 64 cannot accommodate. Therefore, the second driving component 67 drives the adjusting roller 64 to rotate, and then, through the cooperation of the clamping plate 68 and the adjusting roller 64, a portion of the conveyor belt 63 is wound onto the adjusting roller 64, so that the conveyor belt 63 remains taut even when not in operation, facilitating the transfer or transportation of the conveyor belt 63. The second driving component 67 can be a stepper motor.

[0038] It should be noted that a tension roller 65 is rotatably connected to the fixed frame 2. The tension roller 65 abuts against the outer side of the conveyor belt 63. The tension roller 65 is higher than the adjusting roller 64 and lower than the first conveyor roller 61. By having the tension roller 65 adhere to the outer side of the conveyor belt 63, a large wrap angle can be ensured between the conveyor belt 63 and both the first conveyor roller 61 and the adjusting roller 64, thereby ensuring the friction between the first conveyor roller 61, the adjusting roller 64 and the conveyor belt 63. Both the first conveyor belt 5 and the second conveyor belt 6 are driven by motors, and the output shaft of the motor of the second conveyor belt 6 is connected to the first conveyor roller 61.

[0039] A discharge track 22 is connected to the fixed frame 2, and a collection box 11 is installed on the floating boat 1. One end of the discharge channel is located below the discharge end of the second conveyor belt 6, and the other end is located above the collection box 11. The discharge track 22 facilitates the transfer of crushed stone from the second conveyor belt 6 to the collection box 11, making it easy to collect the crushed stone.

[0040] The movable frame 3 is provided with a shock-absorbing rubber pad 31 at the end away from the fixed frame 2, and the shock-absorbing rubber pad 31 is located above the movable frame 3.

[0041] The anti-collision rubber pad 31 contains dampers, with multiple sets of dampers arranged along the length of the movable frame 3, and multiple dampers arranged in each set along the width of the movable frame 3. Through the cooperation of the dampers and the anti-collision rubber pad 31, the vibration when the movable frame 3 collides with the bridge can be reduced, thus reducing the possibility of damage to the bridge.

[0042] Secondly, this application discloses a construction method.

[0043] A construction method, based on the aforementioned equipment for widening and excavating a river channel under an existing bridge, includes the following steps: S1, a first telescopic component drives a fixed frame to move to a set height; S2, a second telescopic component drives a movable frame to move, causing a crushing component to move to a set position; S3, the second telescopic component drives the movable frame to continue moving, the crushing component crushes the rocks, and the crushed rocks are transported to a crushed rock conveying component, which then transports the crushed rocks to a floating platform; S4, the above steps are repeated until the rocks are completely processed.

[0044] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for widening and excavating a river channel beneath an existing bridge, characterized in that, The device includes a fixed frame and a movable frame. The fixed frame is installed on the floating vessel. A first telescopic component is provided vertically inside the floating vessel. The movable end of the first telescopic component is connected to the fixed frame. The movable frame slides on the fixed frame. A second telescopic component is installed on the fixed frame. The movable end of the second telescopic component is connected to the movable frame. A crushing component and a gravel conveying component are connected to the end of the movable frame away from the fixed frame. The crushing component crushes the reef and conveys the resulting gravel to the gravel conveying component, which then conveys the gravel to the floating vessel.

2. The equipment for widening and excavating a river channel under an existing bridge according to claim 1, characterized in that: The crushing assembly includes a first drive component and a crushing disc. The first drive component is mounted on a movable frame, and its output end is connected to the crushing disc.

3. The equipment for widening and excavating a river channel under an existing bridge according to claim 2, characterized in that: The crushing disc includes a cutter holder and cutter bars. The cutter holder is connected to the output end of the first drive component. The cutter bars are arranged on the side wall of the cutter holder and are arranged in multiple arrays along the circumference of the cutter holder. Each cutter bar is provided with an inclined blade. The inclined blade is inclined toward the rotation direction of the cutter holder so that when the cutter holder rotates, the crushed stone cut by the inclined blade is thrown toward the crushed stone conveying component.

4. The equipment for widening and excavating a river channel under an existing bridge according to claim 3, characterized in that: The crushed stone conveying assembly includes a first conveyor belt and a second conveyor belt. The first conveyor belt is mounted on a movable frame to receive crushed stone thrown by inclined blades and convey the crushed stone to the second conveyor belt. One end of the second conveyor belt is mounted on the movable frame, and the other end is mounted on a fixed frame to receive the crushed stone conveyed by the first conveyor belt and convey it to the floating vessel.

5. The equipment for widening and excavating a river channel under an existing bridge according to claim 4, characterized in that: The second conveyor belt includes a first conveyor roller, a second conveyor roller, a conveyor belt, and an adjusting roller. The first conveyor roller is rotatably connected to a fixed frame, and the second conveyor roller is rotatably connected to a movable frame. The conveyor belt is fitted onto the first conveyor roller, the second conveyor roller, and the adjusting roller. Two fixed plates are fixedly connected to the fixed frame, and a sliding plate is fixedly connected to each fixed plate. A slider slides on each sliding plate. The adjusting roller is rotatably connected between the two sliders. A guide rod is connected to the slider. The end of the guide rod away from the slider passes through the fixed plate and is connected to an anti-detachment block. A compression spring is fitted on the guide rod. One end of the compression spring abuts against the slider, and the other end abuts against the fixed plate.

6. The equipment for widening and excavating a river channel under an existing bridge according to claim 5, characterized in that: A second driving component is fixedly connected to the slider. The movable end of the second driving component is connected to the adjusting roller. A clamping plate is fixedly connected to the adjusting roller. The conveyor belt passes between the clamping plate and the adjusting roller.

7. The equipment for widening and excavating a river channel under an existing bridge according to claim 6, characterized in that: A tension roller is rotatably connected to the fixed frame. The tension roller abuts against the outer side of the conveyor belt. The tension roller is higher than the adjusting roller and lower than the first conveying roller.

8. The equipment for widening and excavating a river channel under an existing bridge according to claim 7, characterized in that: The fixed frame is connected to the discharge track, the floating boat is equipped with a collection box, one end of the discharge channel is located below the discharge end of the second conveyor belt, and the other end is located above the collection box.

9. The equipment for widening and excavating a river channel under an existing bridge according to claim 7, characterized in that: The movable frame is provided with a collision-resistant rubber pad at one end away from the fixed frame. The collision-resistant rubber pad is located above the movable frame. The collision-resistant rubber pad contains a damper. Multiple sets of dampers are provided along the length of the movable frame, and multiple dampers are provided in each set along the width of the movable frame.

10. A construction method, based on the river widening and excavation equipment under an existing bridge as described in any one of claims 1-9, characterized in that: The process includes the following steps: S1, the first telescopic component drives the fixed frame to move to a set height; S2, the second telescopic component drives the movable frame to move, so that the crushing component moves to a set position; S3, the second telescopic component drives the movable frame to continue moving, the crushing component crushes the reef and transports the crushed stone to the crushed stone conveying component, which then transports the crushed stone to the floating boat; S4, the above steps are repeated until the reef is completely processed.

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