Movable type multifunctional bottom-holding platform for bridge demolition and use method of movable type multifunctional bottom-holding platform

Abstract

The invention discloses a movable type multifunctional bottom-holding platform for bridge demolition and a using method thereof. The movable type multifunctional bottom-holding platform comprises a telescopic frame body assembly and a negative-pressure waste water collecting system. The telescopic frame body assembly comprises an upper frame body, a lower frame body and a telescopic hydraulic oil cylinder connecting the upper frame body and the lower frame body, the lower frame body wraps the upper frame body to form a nested structure, and the upper frame body is provided with a self-locking roller and a screw locking assembly used for being inserted into a beam section hoisting hole; the negative-pressure waste water collecting system comprises a negative-pressure head tightly attached to the periphery of the cutting section of the bridge, a pipe fitting assembly communicated with the negative-pressure head, a vacuum negative-pressure machine and a waste water collecting tank, wherein the vacuum negative-pressure machine and the waste water collecting tank are arranged on the surface layer of the bridge and communicated with the pipe fitting assembly. The pipe fitting assembly is fixedly connected with the lower frame body and stretches out and draws back synchronously with the telescopic frame body assembly. The negative pressure head surrounds and clings to the cutting surface, is connected through the extensible corrugated hose and is fixedly connected with the bottom-holding platform through the connecting hard pipe, and the height is adjusted through the hydraulic oil cylinder, so that the negative pressure waste water collecting system can automatically stretch out and draw back along with the bottom-holding platform to adapt to different beam section cutting surfaces.

Description

Technical Field

[0001] The present invention relates to the field of bridge demolition, and more specifically, to a mobile multifunctional bottom support platform for bridge demolition and a method for using the same. Background Art

[0002] my country has many bridges and a long history of bridge construction, especially those across rivers and streams. With the upgrading of waterways and the decline in bridge bearing capacity, many bridges are facing the dilemma of being demolished. my country's bridge superstructure demolition technology is becoming more and more mature, but wastewater, dust and waste residue in the process of bridge demolition are still important factors affecting the ecological environment. In addition, the beam cutting process involves many operating procedures, but there is currently no effective operating platform, especially for rope saw drilling operations, which puts operators at risk.

[0003] There are four difficulties in cutting beam sections during bridge demolition: First, a large amount of wastewater will be generated over a wide area when bridge concrete is cut. The wastewater is in a jet-like state and moves disorderly due to the wind, making it difficult to collect. Second, there is no effective working platform during beam section cutting, especially the rope saw penetration operation is extremely inconvenient. Third, bridge concrete cutting and demolition will inevitably produce waste slag and fragments, which fall randomly and are not easy to collect. Fourth, the bridge cutting working surface is constantly changing, and conventional measures have poor adaptability. Summary of the invention

[0004] The purpose of the present invention is to provide a mobile multifunctional bottom support platform for bridge demolition and a method of using the same. The negative pressure head surrounds and is close to the cutting surface. It is connected with an extendable corrugated hose and fixed to the bottom support platform through a connecting hard pipe. The height is adjusted by a hydraulic cylinder so that the negative pressure wastewater collection system can autonomously extend and retract with the bottom support platform to adapt to the cutting surfaces of different beam sections.

[0005] The technical solution adopted by the present invention to solve this technical problem is: to provide a mobile multifunctional bottom-covering platform for bridge demolition, including: a retractable frame assembly and a negative pressure wastewater collection system; The telescopic frame assembly includes an upper frame, a lower frame, and a telescopic hydraulic cylinder connecting the upper frame, the lower frame covers the upper frame to form a nested structure, and the upper frame is provided with a self-locking roller and a screw locking assembly for inserting into the beam section lifting hole; The negative pressure wastewater collection system includes a negative pressure head that fits tightly around the bridge cut section, a pipe assembly connected to the negative pressure head, and a vacuum negative pressure machine and a wastewater collection tank arranged on the bridge surface and connected to the pipe assembly. The pipe assembly is fixedly connected to the lower frame and expands and contracts synchronously with the retractable frame assembly.

[0006] Preferably, in the mobile multifunctional bottom support platform for bridge demolition, the pipe assembly is composed of stretchable corrugated hoses and connecting hard pipes alternately connected, and the connecting hard pipes are fixed to the side of the lower frame by clamps.

[0007] Preferably, in the mobile multifunctional bottom platform for bridge demolition, the screw locking assembly includes a reaction beam, a screw and a nut. The reaction beam is fixed to the upper frame. The screw is inserted into the beam section lifting hole and the reaction beam in sequence and then locked by tightening the nut.

[0008] Preferably, in the mobile multifunctional bottom platform for bridge demolition, the telescopic hydraulic cylinder is a mechanical lock nut type hydraulic cylinder, the cylinder body of which is fixed to the upper frame, the end of the piston rod is hinged to the lower frame, and the cylinder is locked by a mechanical lock nut after being telescoped into place.

[0009] Preferably, in the mobile multifunctional bottom support platform for bridge demolition, the gap between the negative pressure head and the bridge cutting section is ≤2mm, and an elastic sealing strip is provided at the edge of the suction head of the negative pressure head.

[0010] Preferably, the mobile multifunctional bottom-covering platform for bridge demolition has two upper frames symmetrically arranged on both sides of the longitudinal center line of the bridge, and the lower frame is in a U-shaped frame structure, with its two ends respectively covering one end of the two upper frames, and the self-locking roller is arranged at the other end of the upper frame and in rolling contact with the bridge surface.

[0011] The present invention also provides a method for using the above-mentioned mobile multifunctional bottom support platform for bridge demolition, comprising the following steps: S1: Move the bottom platform to the bridge cutting operation surface and lock the self-locking roller; S2: After inserting the screw rod into the beam section lifting hole and the reaction beam in sequence, tighten the nut to complete the locking of the bottom platform; S3: The operator reaches each wire saw installation hole through the bottom platform and puts on the wire saw; S4: Synchronously start the rope saw cutting equipment and the vacuum negative pressure machine, and the cutting wastewater is sucked into the wastewater collection tank through the negative pressure head; S5: After the cutting is completed, loosen the nut and pull out the screw to release the brake of the self-locking roller; S6: According to the height of the next cutting operation section, the telescopic hydraulic cylinder is started to raise or lower the bottom platform and the mechanical lock nut is locked; S7: Repeat steps S1-S6 until all beam segments are cut and removed.

[0012] The present invention has at least the following beneficial effects: 1. The cutting wastewater is collected through the negative pressure wastewater collection system, and the negative pressure head surrounds and is close to the cutting surface, so that the wastewater can be collected in the first time, ensuring that the wastewater is not affected by the wind and splashed outside the bottom platform, eliminating the problem of incomplete wastewater collection in the existing technology.

[0013] 2. The negative pressure heads are connected by stretchable corrugated hoses and fixed to the bottom platform through connecting hard pipes. They can expand and contract autonomously with the bottom platform to adapt to wastewater recovery on the cutting surfaces of different beam sections.

[0014] 3. The waste residue generated by the cutting operation can be completely collected without affecting the ecological environment of the operation area.

[0015] 4. It provides a fully accessible working platform for rope saw perforation operations, greatly reducing the safety risks of operations.

[0016] 5. The prior art adapts to the beam height by adding or removing adjustment sections, but the installation and removal of the adjustment sections is time-consuming and labor-intensive and has great safety risks. The present invention adjusts the height of the bottom platform through a hydraulic cylinder to adapt to changes in beam height, thereby improving the safety risks and work efficiency of the prior art.

[0017] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a mobile multifunctional bottom-covering platform for bridge demolition of the present invention when the cutting operation section is in a shorter state; Figure 2 It is a structural schematic diagram of a mobile multifunctional bottom-covering platform for bridge demolition of the present invention when the cutting operation section is in a state of being raised; Figure 3 This is a structural schematic diagram of a screw locking assembly in a mobile multifunctional bottom support platform for bridge demolition according to the present invention; Figure 4 It is a structural schematic diagram of a telescopic hydraulic cylinder in a mobile multifunctional bottom-covering platform for bridge demolition of the present invention; Explanation of the accompanying drawings: 1. Upper frame, 2. Lower frame, 3. Telescopic hydraulic cylinder, 31. Cylinder body, 32. Piston rod, 33. Mechanical lock nut, 4. Self-locking roller, 5. Beam section lifting hole, 6. Screw locking assembly, 61. Screw, 62. Nut, 63. Reaction beam, 7. Negative pressure head, 8. Extendable corrugated hose, 9. Connecting hard pipe, 10. Vacuum negative pressure machine, 11. Wastewater collection tank, 12. Bridge. DETAILED DESCRIPTION

[0019] The present invention is described in detail and completely below in conjunction with the accompanying drawings. A person of ordinary skill in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly noted that the technical solutions and technical features provided in each part of the present invention, including the following description, can be combined with each other without conflict.

[0020] In addition, the embodiments of the present invention involved in the following description are generally only a part of the embodiments of the present invention, rather than all the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, and its specific implementation process is as follows: like Figure 1-4 As shown, the present invention provides a mobile multifunctional bottom-covering platform for bridge demolition, comprising: a retractable frame assembly and a negative pressure wastewater collection system; The telescopic frame assembly includes an upper frame 1, a lower frame 2, and a telescopic hydraulic cylinder 3 connecting the upper frame 1 and the lower frame 2, the lower frame 2 covers the upper frame 1 to form a nested structure, and the upper frame 1 is provided with a self-locking roller 4 and a screw locking assembly 6 for inserting into a beam section hoisting hole 5; In this embodiment, the overall size of the lower frame 2 is larger than that of the upper frame 1, and can completely cover the upper frame 1 to ensure the integrity of the frame during the extension and retraction process; the self-locking roller 4 can use electromagnetic induction. When the roller stops moving, the induction device triggers the electromagnet, and the electromagnet generates magnetic force to lock the rotating axis of the roller, thereby ensuring that the platform will not slide randomly after positioning. At the same time, the bottom platform is equipped with up and down ladders and walking passages, which can facilitate operators to reach various places on the working surface. The negative pressure wastewater collection system includes a negative pressure head 7 that fits tightly around the cut section of the bridge 12, a pipe assembly connected to the negative pressure head 7, and a vacuum negative pressure machine 10 and a wastewater collection tank 11 that are arranged on the surface layer of the bridge 12 and connected to the pipe assembly. The pipe assembly is fixedly connected to the lower frame 2 and is synchronously retracted with the retractable frame assembly. When the vacuum negative pressure machine 10 is running, the high-speed rotating impeller forms a negative pressure environment in the machine body, and the wastewater and debris are sucked from the negative pressure head 7 into the wastewater collection tank 11 to achieve centralized collection and treatment.

[0022] Furthermore, in the mobile multifunctional bottom platform for bridge demolition, the pipe assembly is composed of an extendable corrugated hose 8 and a connecting hard pipe 9 alternately connected, and the connecting hard pipe 9 is fixed to the side of the lower frame 2 by a clamp to avoid damage or disconnection of the pipe assembly due to expansion and contraction of the frame.

[0023] Furthermore, in the mobile multifunctional bottom support platform for bridge demolition, the screw locking assembly includes a reaction beam 63, a screw 61 and a nut 62. The reaction beam 63 is fixed to the upper frame 1. After the screw 61 is inserted into the beam section lifting hole 5 and the reaction beam 63 in turn, the bottom support platform can be fixed to the beam section by tightening the nut 62 to ensure that the bottom support platform does not move during the operation.

[0024] Furthermore, in the mobile multifunctional bottom support platform for bridge demolition, the telescopic hydraulic cylinder 3 is a mechanical lock nut type hydraulic cylinder, the cylinder body 31 of which is fixed to the upper frame 1, and the end of the piston rod 32 is hinged to the lower frame 2. After the cylinder is telescoped into place, it is locked by the mechanical lock nut 33 to ensure the stability of the bottom support platform.

[0025] Furthermore, in the mobile multifunctional bottom-covering platform for bridge demolition, the gap between the negative pressure head 7 and the bridge cutting section is ≤2mm, which can greatly improve the sealing effect. The edge of the suction head of the negative pressure head 7 is provided with an elastic sealing strip, which can deform itself according to the irregular condition of the bridge cutting section and tightly fill the gap, effectively preventing wastewater and debris from escaping from the gap, so that the negative pressure wastewater collection system can operate efficiently and improve the collection efficiency.

[0026] Furthermore, in the mobile multifunctional bottom platform for bridge demolition, the two upper frames 1 are symmetrically arranged on both sides of the longitudinal center line of the bridge 12, and the lower frame 2 is a U-shaped frame structure, with its two ends respectively covering one end of the two upper frames 1, and the self-locking roller 4 is arranged at the other end of the upper frame 1 and is in rolling contact with the surface layer of the bridge 12, and can move longitudinally along the bridge deck.

[0027] The present invention also provides a method for using the above-mentioned mobile multifunctional bottom support platform for bridge demolition, comprising the following steps: S1: After the bottom platform is moved to the cutting working surface of the bridge 12, the self-locking roller 4 is locked; S2: After inserting the screw 61 into the beam section hoisting hole 5 and the through hole of the reaction beam 63 in sequence, tighten the nut 62 to complete the locking of the bottom platform; S3: The operator reaches each wire saw installation hole through the bottom platform and puts on the wire saw; S4: Synchronously start the rope saw cutting equipment and the vacuum negative pressure machine 10, and the cutting wastewater is sucked into the wastewater collection tank 11 through the negative pressure head 7; S5: After the cutting is completed, the nut 62 is loosened and the screw 61 is pulled out to release the brake of the self-locking roller 4; S6: according to the height of the next cutting operation section, the telescopic hydraulic cylinder 3 is started to raise or lower the bottom platform, and the mechanical lock nut 33 is locked; S7: Repeat steps S1-S6 until all beam segments are cut and removed.

[0028] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

1. A mobile multifunctional bottom platform for bridge demolition, characterized in that: include: retractable frame assembly and negative pressure wastewater collection system; The telescopic frame assembly includes an upper frame, a lower frame, and a telescopic hydraulic cylinder connecting the upper frame, the lower frame covers the upper frame to form a nested structure, and the upper frame is provided with a self-locking roller and a screw locking assembly for inserting into the beam section lifting hole; The negative pressure wastewater collection system includes a negative pressure head that fits tightly around the bridge cut section, a pipe assembly connected to the negative pressure head, and a vacuum negative pressure machine and a wastewater collection tank arranged on the bridge surface and connected to the pipe assembly. The pipe assembly is fixedly connected to the lower frame and expands and contracts synchronously with the retractable frame assembly.

2. The mobile multifunctional bottom support platform for bridge demolition as claimed in claim 1 is characterized in that: The pipe fitting assembly is composed of an extendable corrugated hose and a connecting hard pipe that are alternately connected, and the connecting hard pipe is fixed to the side surface of the lower frame through a clamp.

3. The mobile multifunctional bottom support platform for bridge demolition as claimed in claim 1 is characterized in that: The screw locking assembly includes a reaction beam, a screw and a nut. The reaction beam is fixed to the upper frame. The screw is inserted into the beam section lifting hole and the reaction beam in sequence and then locked by tightening the nut.

4. The mobile multifunctional bridge demolition platform according to claim 1 is characterized in that: The telescopic hydraulic cylinder is a mechanical lock nut type hydraulic cylinder, the cylinder body of which is fixed to the upper frame body, the end of the piston rod is hinged to the lower frame body, and the cylinder is locked by the mechanical lock nut after being telescoped into place.

5. The mobile multifunctional bottom support platform for bridge demolition as claimed in claim 1 is characterized in that: The gap between the negative pressure head and the bridge cutting section is ≤2mm, and an elastic sealing strip is provided on the edge of the suction head of the negative pressure head.

6. The mobile multifunctional bottom support platform for bridge demolition as claimed in claim 1 is characterized in that: The two upper frames are symmetrically arranged on both sides of the longitudinal center line of the bridge. The lower frame is a U-shaped frame structure, and its two ends respectively cover one end of the two upper frames. The self-locking roller is arranged at the other end of the upper frame and is in rolling contact with the bridge surface.

7. A method for using the mobile multifunctional bottom support platform for bridge demolition as described in any one of claims 1 to 6 above, characterized in that: The steps include: S1: Move the bottom platform to the bridge cutting operation surface and lock the self-locking roller; S2: After inserting the screw rod into the beam section lifting hole and the reaction beam in sequence, tighten the nut to complete the locking of the bottom platform; S3: The operator reaches each wire saw installation hole through the bottom platform and puts on the wire saw; S4: Synchronously start the rope saw cutting equipment and the vacuum negative pressure machine, and the cutting wastewater is sucked into the wastewater collection tank through the negative pressure head; S5: After the cutting is completed, loosen the nut and pull out the screw to release the brake of the self-locking roller; S6: According to the height of the next cutting operation section, the telescopic hydraulic cylinder is started to raise or lower the bottom platform and the mechanical lock nut is locked; S7: Repeat steps S1-S6 until all beam segments are cut and removed.

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