Prefabricated box girder production and transportation equipment and prefabricated box girder production and transportation method

Abstract

The invention provides prefabricated box girder production and transportation equipment and a prefabricated box girder production and transportation method, solves the problems of complicated installation, disordered lines, disordered sites and high maintenance cost of conventional transportation equipment, and realizes assembly line prefabrication of a box girder prefabrication beam field. Meanwhile, the prefabricated box girder production situation that installation is simple, overall stress is balanced, cyclic utilization is achieved, and standardized production is achieved is met, the prefabricated box girder comprises a chassis and at least two sets of supporting power systems, the supporting power systems are distributed in parallel, and each supporting power system comprises a plurality of crawler conveyors distributed in the length direction of a prefabricated box girder; the crawler belt conveyor comprises a machine frame, chains capable of being driven to rotate are arranged on the left side and the right side of the machine frame, a plurality of crawler belt plates are connected between the two chains, the bottom faces of the crawler belt plates are connected with sliding plates, and the sliding plates make contact with the top face of the machine frame and slide relative to the top face of the machine frame. The chassis is used for transporting prefabricated box girders and placed on the upper surface of a track shoe of the supporting power system.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction engineering, and in particular to the field of prefabricated box girder production, and specifically to a prefabricated box girder production and transportation equipment and a prefabricated box girder production and transportation method. Background Art

[0002] At present, the 30m prefabricated box girders used in highway bridges are mostly produced by the assembly line prefabrication mode of the box girder prefabrication yard to replace the original fixed pedestal, which is convenient for standardized management and factory production to achieve centralized production management of each process and improve construction efficiency. The assembly line transportation method in the production process of prefabricated box girders, each production line includes a steel bar binding station, a casting station, and multiple curing stations, tensioning stations, etc., and each process of the prefabricated box girder is carried out through one production line.

[0003] In the prior art, the prefabrication mode of the box girder prefabrication yard assembly line requires a multi-station mobile pedestal for movement and turnover. At present, the conventional mobile pedestal is mainly a steel structure chassis with rollers moved on the track laid on the ground. This method requires the assistance of two tracks. The track laying distance is relatively long. According to the steel bar binding station, casting station, and multiple curing stations and tensioning stations, it is necessary to lay about 150 meters of track. Its parallelism is greatly affected by the installation accuracy and requires higher installation accuracy. The rollers are integrated with the steel structure chassis, and the motor power supply line needs to move forward with the rollers. The overall line is messy and the site is relatively chaotic. In addition, the prefabricated box girder is 30 meters long as a whole, with large volume and deadweight. The chassis rollers are easily damaged, which increases the maintenance workload. Summary of the invention

[0004] The present invention provides a prefabricated box girder production and transportation equipment and a prefabricated box girder production and transportation method, which overcome the problems of complex installation of previous transportation equipment, messy lines, chaotic sites, and high maintenance costs, and realize the prefabrication of box girders on a prefabricated beam yard assembly line, while meeting the current status of prefabricated box girder production with simple installation, overall balanced force, recycling, and standardized production.

[0005] The present invention is achieved through the following technical solutions: A prefabricated box beam production and transportation equipment, comprising a chassis and at least two supporting power systems, the supporting power systems are arranged in parallel, and the supporting power systems include a plurality of crawler conveyors distributed along the length direction of the prefabricated box beam; The crawler conveyor comprises a frame, and chains capable of driving rotation are arranged on the left and right sides of the frame, and a plurality of crawler plates are connected between the two chains, and a slide plate is connected to the bottom surface of the crawler plate, and the slide plate contacts and slides relatively with the top surface of the frame; The chassis is used for transporting prefabricated box beams, and the chassis is placed on the upper surface of the crawler shoe supporting the power system.

[0006] Furthermore, the supporting power system consists of two sets and is symmetrically distributed in parallel. The chassis comprises two steel sections which are parallelly distributed on the left and right sides. The steel sections are extended and distributed along the length direction of the prefabricated box beam. The two steel sections are connected as a whole by a plurality of transverse channel steels.

[0007] Furthermore, the bottom surface width of the steel section is smaller than the width of the track shoe.

[0008] Further, the frame includes a steel box, a bottom steel plate and columns; The front and rear ends of the steel box are respectively swivel-mounted with a driving shaft and a driven shaft that are laterally distributed on the left and right sides, and driving sprockets are arranged at both ends of the driving shaft, and driven sprockets are arranged at both ends of the driven shaft; two chains are respectively assembled and connected with the driving sprocket and the driven sprocket located on the same side, and one end of the driving shaft is connected with a motor; The bottom steel plate is located below the steel box and is fixedly connected to the steel box through the columns.

[0009] Furthermore, the slide plate is detachably connected to the bottom surface of the track shoe via a bolt assembly.

[0010] Furthermore, the length of the crawler conveyor is 1-1.5m, the distance between adjacent crawler conveyors is 3-4m, and the length of the chassis is 30-35m.

[0011] A method for transporting a prefabricated box girder, using the prefabricated box girder production and transportation equipment of the present invention for production and transportation, comprising the following steps: S01. Determine the total length of the two supporting power systems and the number of crawler conveyors according to the length of the prefabricated box girder production line; Fix each crawler conveyor on the ground to form two sets of left-right symmetrical and parallel supporting power systems; S02. Hoist the chassis to the starting position of the supporting power system so that the bottom of the chassis contacts the upper surface of the crawler shoe of the crawler conveyor; S03. After the chassis is adjusted to the appropriate position, the steel bars are tied on the chassis according to the drawings of the prefabricated box beams, and then the concrete is poured through the formwork; S04. When the concrete solidifies and has strength, start the crawler conveyor in the corresponding workstation area and move the chassis The prefabricated box beams are longitudinally transported to the next workstation area in sequence to carry out the corresponding workstation process; During the chassis transmission process, when the chassis deviates laterally, the left and right symmetrical crawler conveyors are used to adjust the differential speed and correct the deviation in time, and then the chassis moves forward longitudinally. S05. After the curing of the prefabricated box girder is completed at the last workstation, the prefabricated box girder will be hoisted to the beam storage area, and the chassis will be hoisted to the first workstation through the gantry crane to complete the overall cycle operation.

[0012] Furthermore, in step S01, The overall length of the supporting power system is 150m. In the same supporting power system, there are 11 crawler conveyors with a spacing of 3m.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a prefabricated box beam production and transportation equipment, which includes establishing a supporting power system on the ground, hoisting a chassis on the supporting power system, casting a prefabricated box beam on the chassis, and transporting the prefabricated box beam when a crawler conveyor is working; Compared with the traditional line contact force-bearing method of chassis rollers and tracks, the present invention forms surface contact force through the contact between the track shoes and the chassis, which is more stable and reliable; at the same time, the track shoes slide relative to the bracket through the slide plate, and the track shoes and the slide plate are responsible for bearing vertical pressure. The slide plate is in contact with the sliding surface of the frame, which can reduce sliding friction resistance. The overall design is compact, the pressure-bearing surface is in surface contact, the force is stable, the movement process is flexible, and the transmission stability is improved; the chain is responsible for driving and does not bear vertical pressure, which avoids damage to the chain transmission due to excessive load and improves the service life; The present invention changes the original driving structure that follows the prefabricated box beam to one that is laid on the ground, thereby increasing the operational safety of the overall equipment. The supporting power system and chassis can be combined in length at will, and can be adapted to the production of prefabricated box beams of various lengths, thereby increasing the production of prefabricated box beams of multiple sizes and diversification on the production line. The prefabricated box girder transportation method of the present invention meets the prefabricated box girder production requirements of simple installation, overall force balance, recycling, and standardized production, and can adjust the left and right deviations of the prefabricated box girder during the forward process by differential speed; 2. There are two sets of supporting power systems and they are symmetrically distributed in parallel. Each set of supporting power systems includes multiple crawler conveyors distributed along the length direction of the prefabricated box beam. When the chassis carries the prefabricated box beam and the chassis deviates laterally, the crawler conveyors symmetrically located on both sides are used to adjust the differential speed and correct the deviation in time, and then proceed with the subsequent longitudinal movement. Multiple crawler conveyors can be adjusted according to the production line length required by the prefabricated box beam. When a crawler conveyor fails, only the corresponding crawler conveyor needs to be replaced to ensure production efficiency. 3. The frame includes a steel box, a bottom steel plate and columns. The track shoes and slide plates are responsible for bearing the vertical pressure of the prefabricated box beam. The slide plates are in contact with the sliding surface of the frame. The steel box is more solid and stable and can withstand the vertical pressure from the slide plates, ensuring the stability of transportation. 4. The slide plate is detachably connected to the bottom surface of the track plate through a bolt assembly. Due to the sliding friction between the slide plate and the frame, when the slide plate is severely worn, it can be replaced at any time, with low operation and maintenance costs to ensure normal transportation; 5. The chassis includes two parallel steel parts, the bottom width of which is smaller than the width of the track shoe. This design ensures that the chassis is in full contact with the surface of the track shoe of the crawler conveyor. The overall design is compact, the force is stable, and the movement process is flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a plan view of the crawler conveyor of the present invention; Figure 2 It is a side view of the prefabricated box girder production and transportation equipment of the present invention; Figure 3 is an axonometric schematic diagram of the crawler conveyor of the present invention; Figure 4 It is a semi-exploded diagram of the crawler conveyor of the present invention; Figure 5 It is a longitudinal elevation view of the prefabricated box girder production and transportation equipment transporting the prefabricated box girder of the present invention; In the figure: 1, frame, 11, steel box, 12, bottom steel plate, 2, column, 3, driving sprocket, 4, driving shaft, 5, chain, 6, track plate, 7, motor, 8, chassis, 81, steel section, 82, transverse channel steel, 9, prefabricated box beam, 10, slide plate, 101, connecting hole. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0016] In the description of the invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front", "rear", "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the invention.

[0017] Taking the production of 30m prefabricated box girders for highway bridge applications as an example, the existing box girder prefabrication line prefabrication mode requires a multi-station mobile pedestal for movement and turnover. Currently, the conventional mobile pedestal mainly moves on a steel structure chassis with rollers on a track laid on the ground. About 150 meters of track needs to be laid, and the motor power supply line needs to move forward with the movement of the rollers, and the overall line is messy.

[0018] To solve the above technical problems, Figure 1-5 As shown, this embodiment discloses a prefabricated box beam production and transportation equipment, which mainly includes a chassis 8 and two sets of supporting power systems, wherein the chassis 8 includes two parallel steel members 81, which extend along the length direction of the prefabricated box beam. Since the length of the prefabricated box beam in this embodiment is 30m, the steel member 81 can be selected to be 31m long. The two steel members 81 are welded together by a plurality of transverse channel steels 82, so that the cross section of the chassis 8 is in the shape of a portal frame.

[0019] The two supporting power systems are symmetrically distributed in parallel. Each supporting power system includes a plurality of crawler conveyors distributed along the length direction of the prefabricated box beam. The number and spacing of the crawler conveyors are designed according to the preset track length. Each crawler conveyor includes a frame 1. Since the frame 1 bears the main load, in order to ensure the supporting performance, the frame 1 includes a steel box 11, a bottom steel plate 12 and a column 2. The bottom steel plate 12 is located below the steel box 11 and is fixedly connected to the steel box 11 by welding through the column 2. The bottom steel plate 12 is fixedly connected to the concrete floor. The overall length of the crawler conveyor is 1m.

[0020] The front and rear ends of the steel box 11 are respectively swivel-mounted with a driving shaft 4 and a driven shaft that are laterally distributed on the left and right through bearing assemblies. A driving sprocket 3 is fixedly mounted at both ends of the driving shaft 4, and a driven sprocket is fixedly mounted at both ends of the driven shaft. The driving sprocket 3 and the driven sprocket on the same side are chain-driven by a chain 5. Motors 7 are fixed in sequence on the frame 1, and the output shaft of the motor 7 is connected to one end of the driving shaft 4. The two chains 5 are swivel-moved by the motor 7. Several track shoes 6 are connected between the two chains by screws or hinges. A slide plate 10 is installed on the bottom surface of the track shoe 6 by a bolt assembly. The slide plate 10 contacts the top surface of the frame 1 and slides relatively. A connecting hole 101 is processed on the slide plate 10, and the slide plate 10 can be replaced according to the degree of wear. When in use, the chassis 8 is hoisted onto two sets of supporting power systems so that the bottom of the steel parts 81 of the chassis 8 contacts the upper surfaces of the track shoes 6 of the two sets of supporting power systems respectively, and the bottom width of the steel parts 81 is slightly smaller than the width of the track shoes 6.

[0021] Based on the above-mentioned prefabricated box girder production and transportation equipment, this embodiment also provides a prefabricated box girder transportation method, including the following steps: S01. Determine the total length of the two supporting power systems and the number of crawler conveyors according to the length of the prefabricated box girder production line; In this embodiment, the length of the entire production line is set to 150m, so the overall length of the support power system is 150m. In the same support power system, the number of crawler conveyors is 11, and the spacing is 3m; Fix each crawler conveyor on the concrete floor to form two sets of left-right symmetrical and parallel supporting power systems; S02, hoisting the chassis 8 to the starting position of the supporting power system, so that the bottom of the steel member 81 of the chassis 8 contacts the upper surface of the crawler shoe 6 of the crawler conveyor; S03. After the chassis 8 is adjusted to a suitable position, the steel bars are tied on the chassis 8 according to the drawings of the prefabricated box beam, and then concrete is poured through the formwork; S04. When the concrete solidifies and has strength, the crawler conveyor in the corresponding workstation area is started to longitudinally transport the chassis 8 and the prefabricated box beam 9 to the next workstation area in sequence to carry out the process of the corresponding workstation; During the conveying process of the chassis 8, when the chassis 8 deviates laterally, the left-right symmetrical crawler conveyor is promptly used to adjust the differential speed and correct the deviation, and then the chassis 8 moves forward longitudinally; S05. After the curing of the prefabricated box girder at the last workstation is completed, the prefabricated box girder is hoisted to the beam storage area, and the chassis 8 is hoisted to the first workstation by the gantry crane to complete the overall cycle operation.

[0022] Compared with the traditional line contact force mode of chassis roller and track, the present invention forms surface contact force through the contact between track shoe 6 and chassis 8, which is more stable and reliable; at the same time, track shoe 6 slides relative to the bracket through slide plate 10, track shoe 6 and slide plate 10 are responsible for bearing vertical pressure, slide plate 10 contacts the sliding surface of frame 1, which can reduce sliding friction resistance, and at the same time, the bracket directly bears the load to ensure the stability of the support. The overall design is compact, the pressure-bearing surface is surface contact, the force is stable, the moving process is flexible, and the transmission stability is improved; the chain is responsible for driving without bearing vertical pressure, avoiding damage to the chain transmission due to excessive load, and improving the service life.

Claims

1. A prefabricated box girder production and transportation equipment, characterized in that: It comprises a chassis and at least two supporting power systems, which are arranged in parallel, and the supporting power systems comprise a plurality of crawler conveyors distributed along the length direction of the prefabricated box beam; The crawler conveyor comprises a frame, and chains capable of driving rotation are arranged on the left and right sides of the frame, and a plurality of crawler plates are connected between the two chains, and a slide plate is connected to the bottom surface of the crawler plate, and the slide plate contacts and slides relatively with the top surface of the frame; The chassis is used for transporting prefabricated box beams, and the chassis is placed on the upper surface of the crawler shoe supporting the power system.

2. The prefabricated box beam production and transportation equipment according to claim 1 is characterized in that: The supporting power system consists of two sets and is symmetrically distributed in parallel. The chassis comprises two steel sections which are parallelly distributed on the left and right sides. The steel sections are extended and distributed along the length direction of the prefabricated box beam. The two steel sections are connected as a whole by a plurality of transverse channel steels.

3. The prefabricated box beam production and transportation equipment according to claim 2 is characterized in that: The bottom surface width of the steel section is smaller than the width of the track shoe.

4. The prefabricated box beam production and transportation equipment according to claim 1 is characterized in that: The frame includes a steel box, a bottom steel plate and columns; The front and rear ends of the steel box are respectively swivel-mounted with a driving shaft and a driven shaft that are laterally distributed on the left and right sides, and driving sprockets are arranged at both ends of the driving shaft, and driven sprockets are arranged at both ends of the driven shaft; two chains are respectively assembled and connected with the driving sprocket and the driven sprocket located on the same side, and one end of the driving shaft is connected with a motor; The bottom steel plate is located below the steel box and is fixedly connected to the steel box through the columns.

5. The prefabricated box beam production and transportation equipment according to claim 1 is characterized in that: The slide plate is detachably connected to the bottom surface of the track shoe via a bolt assembly.

6. The prefabricated box beam production and transportation equipment according to any one of claims 1 to 5, characterized in that: The length of the crawler conveyor is 1-1.5m, the distance between adjacent crawler conveyors is 3-4m, and the length of the chassis is 30-35m.

7. A method for transporting prefabricated box beams, characterized in that: The production and transportation of the prefabricated box beams according to any one of claims 1 to 5 is carried out by using the production and transportation equipment, which comprises the following steps: S01. Determine the total length of the two supporting power systems and the number of crawler conveyors according to the length of the prefabricated box girder production line; Fix each crawler conveyor on the ground to form two sets of left-right symmetrical and parallel supporting power systems; S02. Hoist the chassis to the starting position of the supporting power system so that the bottom of the chassis contacts the upper surface of the crawler shoe of the crawler conveyor; S03. After the chassis is adjusted to the appropriate position, the steel bars are tied on the chassis according to the drawings of the prefabricated box beams, and then the concrete is poured through the formwork; S04. When the concrete solidifies and has strength, start the crawler conveyor in the corresponding workstation area and move the chassis The prefabricated box beams are longitudinally transported to the next workstation area in sequence to carry out the corresponding workstation process; During the chassis transmission process, when the chassis deviates laterally, the left and right symmetrical crawler conveyors are used to adjust the differential speed and correct the deviation in time, and then the chassis moves forward longitudinally. S05. After the curing of the prefabricated box girder is completed at the last workstation, the prefabricated box girder will be hoisted to the beam storage area, and the chassis will be hoisted to the first workstation through the gantry crane to complete the overall cycle operation.

8. The method for transporting prefabricated box beams according to claim 7, characterized in that: In step S01, The overall length of the supporting power system is 150m. In the same supporting power system, there are 11 crawler conveyors with a spacing of 3m.

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