Concrete vibrating and leveling machine for railway prefabricated box beams

Abstract

The present invention relates to a concrete vibrating and leveling machine for railway prefabricated box beams, and belongs to the technical field of railway box bridge assembly equipment. The machine includes a truss-type main frame, a walking mechanism, an adjustable vibrating mechanism, an adjustable leveling mechanism and an electric control box; the walking mechanism includes a door-type frame, a walking wheel, a transmission mechanism and a walking frequency conversion motor, and the adjustable vibrating mechanism includes a vibrating rod motor, a cantilever, a cantilever truss connector, a vibrating rod, a vertically movable electric cylinder and a horizontally movable electric cylinder; the cantilever truss connector includes a connecting plate and a rotating drum fixed to one side of the truss, the vibrating rod is arranged at one end of the cantilever, and the other end of the cantilever is hinged to the outer wall of the rotating drum, and the vibrating rod motor is connected to the vibrating rod through a transmission hose; one end of the vertically movable electric cylinder is fixed to the outer wall of the rotating drum, and the other end is connected to the cantilever; one end of the horizontally movable electric cylinder is fixed to one side of the truss, and the other end is connected to the outer wall of the rotating drum. The machine can form a comprehensive vibration for concrete pouring.

Description

Technical Field

[0001] The invention relates to a machine for vibrating and leveling concrete when pouring concrete for a railway prefabricated box girder, belonging to the technical field of railway box-type bridge assembly equipment. Background Art

[0002] In recent years, my country's high-speed railway construction has ushered in a golden period of development. Taking 2019 as an example, bridges accounted for 45.2% of the length of newly built high-speed railways, of which standard span simply supported beam bridges accounted for more than 90% of the total length of bridges. Under the national work deployment of "improving the modernization level of the industrial chain and supply chain", the construction of steel bars, prestressed steel and other projects of railway prefabricated box girders has achieved a high degree of intelligence and mechanization. However, in contrast to box girder concrete projects, due to the timeliness of concrete construction, conventional construction adopts a labor-intensive operation method, and the construction quality is greatly affected by the construction workers, with large personnel investment, low construction efficiency and difficult quality control.

[0003] For this reason, large-scale pouring machinery and equipment for box girder concrete have emerged. For example, the Chinese patent application with publication number CN111996916A discloses a cast-in-place box girder integrated construction equipment and construction method thereof. The patent application text generally proposes a steel bar processing workshop, a mobile formwork for providing a casting formwork, a material distribution system, a tamping and vibrating system, and a surface finishing system. However, the tamping and vibrating frame of the tamping and vibrating system is installed on a crane and the tamping and vibrating process is completed by the crane. Specifically, the lifting of the crane is provided so that the vibrating rod is inserted into the gap between the steel bars to complete the vibration of the top plate concrete, while the vibration of the web and the bottom plate is still completed manually. Obviously, for such a large concrete project as a railway prefabricated box girder, it is not enough to complete the vibration of the top surface part of the concrete by providing a single vibrating rod for lifting by the crane. Its stroke is also single and has no angle change. It is impossible to vibrate the railway prefabricated box girder concrete in full area and full depth, so the overall quality of the railway prefabricated box girder concrete cannot be guaranteed.

[0004] In addition, most of the known existing concrete vibrators can only vibrate the shallow layer of the top surface of the concrete, and can only vibrate a small area of ​​concrete at the same time, such as a small vibrator when paving road pavement concrete. Summary of the invention

[0005] The technical problem to be solved by the present invention is to realize full-area and effective-depth vibration of concrete pouring of large railway prefabricated box beams and to realize the leveling of concrete of various specifications.

[0006] The technical solution proposed by the present invention to solve the above technical problems is: a vibrating and leveling machine for concrete of railway prefabricated box girders, comprising a main frame, a walking mechanism, an adjustable vibrating mechanism, an adjustable leveling mechanism and an electric control box; the main frame adopts a rectangular truss, the walking mechanism comprises a door-type frame arranged at both ends of the truss, a walking wheel arranged at the bottom of the door-type frame, a transmission mechanism and a walking frequency conversion motor, the walking wheel falls on the two side tracks on the top of the casting pedestal of the railway prefabricated box girder, the truss spans the railway prefabricated box girder, the adjustable vibrating mechanism is arranged along one side of the truss, the adjustable vibrating mechanism comprises a vibrating rod motor, a cantilever, a cantilever truss connector, a vibrating rod, A vertical moving electric cylinder and a horizontal moving electric cylinder; the cantilever truss connector includes a connecting plate and a rotating cylinder fixed to one side of the truss, a core shaft is arranged in the rotating cylinder, and bearing seats are arranged at the upper and lower ends of the connecting plate, and both ends of the core shaft are arranged in the bearing seats, the vibrating rod is arranged at one end of the cantilever, and the other end of the cantilever is hinged to the outer wall of the rotating cylinder, and the output end of the vibrating rod motor is connected to the top end of the vibrating rod through a transmission hose; one end of the vertical moving electric cylinder is fixed on the outer wall of the rotating cylinder, and the protruding end of the piston rod at the other end is connected to the cantilever; one end of the horizontal moving electric cylinder is fixed on one side of the truss, and the protruding end of the piston rod at the other end is connected to the outer wall of the rotating cylinder.

[0007] Furthermore, the adjustable leveling mechanism is located at the bottom of the main frame and is symmetrically arranged in two groups along the main frame. Each group is composed of a leveling adjustment wheel, a leveling rod, a leveling roller motor and a lifting bracket. The leveling rods of the two groups of adjustable leveling mechanisms are parallel and staggered to form overlapping sections.

[0008] Furthermore, both ends of the truss are made into lifting brackets, and sliding grooves are formed on the inner sides of the vertical frames on both sides of the portal frame, and the two sides of the lifting bracket are embedded in the sliding grooves; a screw rod is passed through the top of the lifting bracket; one end of the screw rod is fixed to the top of the portal frame, and the other end is screwed to a threaded driver, and the threaded driver and its fixing seat are fixed to the two vertical inner walls of the lifting bracket.

[0009] Furthermore, the cantilever is composed of two parallel square tubes, and a vertical connecting seat plate, a horizontal connecting seat plate and a cantilever connecting seat plate are fixed on the outer wall of the rotating drum. The vibrating rod is fixed to one end of the cantilever through a clamp, and the other end of the cantilever is hinged to the cantilever connecting seat plate. One end of the vertical moving electric cylinder is connected to the vertical connecting seat plate, and the protruding end of the piston rod at the other end is connected to a square tube of the cantilever; one end of the horizontal moving electric cylinder is fixed to the seat plate on one side of the truss, and the protruding end of the piston rod at the other end is connected to the horizontal connecting seat plate.

[0010] Furthermore, the transverse chord, longitudinal chord, vertical rod and diagonal brace of the truss are formed by welding square tubes to each other, and a steel plate is laid on the top of the truss.

[0011] The concrete vibrating and leveling machine for railway prefabricated box girders of the present invention has the following beneficial effects: due to the uniquely designed adjustable vibrating mechanism, it can form a slight circular vibration, up and down arc movement in the vertical plane and horizontal arc movement in the horizontal plane, plus the linear movement of the vibrating and leveling machine, so that the concrete can be vibrated and covered with sufficient full area and effective depth. In addition, due to the uniquely designed adjustable leveling mechanism, the leveling roller can have a slope, and the lifting bracket can adjust the overall height of the leveling roller, so that the concrete of different types and specifications cast in the railway box girder can be adaptively leveled. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The concrete vibrating and leveling machine for railway prefabricated box beams of the present invention will be further described below in conjunction with the accompanying drawings.

[0013] Figure 1 It is a schematic diagram of the overall structure of a concrete vibrating and leveling machine for a railway prefabricated box girder in an embodiment.

[0014] Figure 2 is from Figure 1 Schematic diagram of the structure of a single adjustable vibrating mechanism decomposed from .

[0015] Figure 3 yes Figure 1 The schematic diagram of the local structure of the leveling mechanism is shown in FIG.

[0016] Figure 4 yes Figure 1 The schematic diagram of the local structure of the walking mechanism is shown in FIG. DETAILED DESCRIPTION Example

[0017] The concrete vibrating and leveling machine for the railway prefabricated box girder of the present embodiment is as follows: Figure 1 As shown, it includes a main frame 1, a traveling mechanism 2, an adjustable vibrating mechanism 3, an adjustable leveling mechanism 4 and an electric control box 5. The main frame 1 adopts a rectangular truss, which spans the railway prefabricated box girder. The transverse chord, longitudinal chord, vertical rod and diagonal brace of the truss are welded to each other using square tubes. Two lifting ears 1-1 are welded on the top of the truss for lifting the truss. The traveling mechanism 2 includes a portal frame 2-1 arranged at both ends of the truss, a traveling wheel 2-4 at the bottom of the portal frame 2-1, a transmission mechanism and a traveling frequency conversion motor 2-2. The transmission mechanism adopts a chain sprocket 2-3, and the traveling wheel 2-4 falls on the two side tracks on the top of the casting pedestal of the railway prefabricated box girder; the traveling frequency conversion motor is fixed on the support at the bottom of the portal frame 2-1.

[0018] A plurality of adjustable vibrating mechanisms 3 are arranged along one side of the truss across the railway prefabricated box girder. Figure 2 As shown, the adjustable vibrating mechanism 3 includes a vibrating rod motor 3-1, a cantilever 3-4, a cantilever truss connector, a vibrating rod 3-3, a vertical moving electric cylinder 3-6 and a horizontal moving electric cylinder 3-5. The cantilever 3-4 of this embodiment is composed of two parallel square tubes. The truss connector includes a connecting plate 3-12 fixed to one side of the truss and a rotating drum 3-8, a core shaft is arranged in the rotating drum 3-8, and the upper and lower ends of the connecting plate 3-12 are provided with bearing seats, and the two ends of the core shaft are arranged in the bearing seats. A vertical connecting seat plate 3-9, a horizontal connecting seat plate 3-10 and a cantilever connecting seat plate 3-11 are fixed on the outer wall of the rotating drum 3-8, the vibrating rod 3-3 is arranged at one end of the cantilever 3-4 and fixed by a clamp 3-7, and the other end of the cantilever 3-4 is hinged to the cantilever connecting seat plate 3-11 on the outer wall of the rotating drum 3-8, and the output end of the vibrating rod motor 3-1 is connected to the top of the vibrating rod 3-3 through a transmission hose 3-2. One end of the vertical moving electric cylinder 3-6 is connected to the vertical connection seat plate 3-9 of the outer wall of the rotating drum 3-8, and the extended end of the piston rod of the other end of the vertical moving electric cylinder 3-6 is connected to a square tube located at the top of the cantilever 3-4 (it can also be a square tube located at the bottom). One end of the horizontal moving electric cylinder 3-5 is fixed on the seat plate 3-13 on one side of the truss, and the extended end of the piston rod of the other end of the horizontal moving electric cylinder 3-5 is connected to the horizontal connection seat plate 3-10 of the outer wall of the rotating drum 3-8.

[0019] When in use, the piston rod of the vertical moving electric cylinder 3-6 can be extended and retracted to make the cantilever 3-4 and the vibrating rod 3-3 at one end thereof move in an up-and-down arc in the vertical plane, and the vibrating rod 3-3 can be inserted into the concrete cast by the railway box girder or pulled out from the concrete cast by the railway prefabricated box girder. When the vibrating rod 3-3 is inserted into the concrete cast by the railway prefabricated box girder, the piston rod of the vertical moving electric cylinder 3-6 is stopped to be extended and retracted, and the vibrating rod motor 3-1 is equipped with an eccentric vibrator, and the vibrating rod motor 3-1 makes the vibrating rod 3-3 generate high-frequency micro-amplitude circular vibration through the transmission hose 3-2; at this time, the piston rod of the horizontal moving electric cylinder 3-5 is extended and retracted to make the rotating drum 3-8 rotate and drive the cantilever 3-4 and the vibrating rod 3-3 at one end thereof to move in a horizontal arc in the horizontal plane, and the vibrating rod 3-3 can vibrate in a section of the arc in the concrete cast by the railway prefabricated box girder. At the same time, starting the walking mechanism 2 drives the entire vibrating and leveling machine to move in a straight line. The vibrating rod 3-3 can form multiple connected arc-shaped vibrations in the concrete cast in the railway box girder. In actual construction, a plum blossom-shaped vibration trajectory can be formed on the concrete, thereby forming a full-area and full-depth vibration coverage of the concrete.

[0020] like Figure 3As shown, the adjustable leveling mechanism 4 is located at the bottom of the main frame 1 and is symmetrically arranged in two groups along the main frame 1, including two leveling adjustment wheels 4-1, two leveling rods 4-2 and two leveling roller motors 4-3; the two leveling rods 4-2 of the two groups are parallel and staggered to form an overlapping section, the length of which is generally one-third to one-quarter of the length of the leveling rod 4-2, to ensure that the concrete on the surface of the railway prefabricated box girder is fully leveled. The leveling adjustment wheel 4-1 is fixed to the truss of the main frame 1, and one end of the leveling adjustment wheel 4-1 is connected to the end of the leveling roller 4-2. The height of one end of the leveling roller 4-2 can be adjusted by rotating the leveling adjustment wheel 4-1; the other end of the leveling roller 4-2 is connected to the output end of the leveling roller motor 4-3 through a chain; the leveling roller motor 4-3 is fixed to the truss of the main frame 1.

[0021] like Figure 4 As shown, both ends of the truss of the main frame 1 are configured as lifting brackets 4-4, and slide grooves are formed on the inner sides of the vertical frames on both sides of the portal frame 2-1, and the two sides of the lifting bracket 4-4 are embedded in the slide grooves. A screw rod 4-5 is passed through the top of the lifting bracket 4-4; one end of the screw rod 4-5 is fixed to the top of the portal frame 2-1, and the other end is screwed to the threaded driver 4-6, and the threaded driver 4-6 and its fixing seat are fixed to the two vertical inner side walls of the lifting bracket 4-4. The lifting bracket 4-4 and the portal frame 2-1 are both made of channel steel.

[0022] When in use, 1) the height of one end of the leveling roller 4-2 can be adjusted by adjusting the leveling adjustment wheel 4-1 so that the leveling roller 4-2 has a slope; 2) the overall height of the leveling roller 4-2 can be adjusted by adjusting the screw rod 4-5 at the top of the lifting bracket 4-4. Thus, the concrete of different types and specifications can be adaptively leveled for the pouring of railway prefabricated box girders.

[0023] The electric control box 5 includes a programmable controller, which can control the travel frequency conversion motor 2-2, the vibrating rod motor 3-1, the horizontal movement electric cylinder 3-5, the vertical movement electric cylinder 3-6, and the leveling roller motor 4-3 respectively.

[0024] The travel frequency conversion motor 2-2 is started by the electric control box 5, and the power is transmitted to the running wheel 2-4 at the bottom of the portal frame 2-1 through the transmission chain 2-3, driving the portal frame 2-1 and the entire vibrating and leveling machine to move forward and backward along the two side tracks on the top of the railway prefabricated box girder casting pedestal.

[0025] The above is only a preferred embodiment of the present invention, but the present invention is not limited thereto, for example: 1) the lifting mechanism 3 may adopt other structures in addition to the structure of the above embodiment; 2) the structure of the main truss may adopt other structures in addition to the structure of the above embodiment and the illustrated structure; 3) the cantilever 3-4 may also be composed of one, three or more square tubes or round tubes, etc.; 4) the articulation of the rotating drum 3-8 and the cantilever 3-4 and the articulation of the rotating drum 3-8 and the electric cylinders 3-5 and 3-6 respectively may also adopt other methods; etc. All equivalent replacements or equivalent changes based on the concepts and technical solutions of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A concrete vibrating and leveling machine for railway prefabricated box beams, comprising a main frame, a traveling mechanism, an adjustable vibrating mechanism, an adjustable leveling mechanism and an electric control box; the main frame adopts a rectangular truss, the traveling mechanism comprises a door-type frame arranged at both ends of the truss, a traveling wheel arranged at the bottom of the door-type frame, a transmission mechanism and a traveling frequency conversion motor, characterized in that: The walking wheels fall on the rails on both sides of the top of the casting pedestal of the railway prefabricated box girder, the truss spans the railway prefabricated box girder, and the adjustable vibrating mechanism is arranged in multiple along one side of the truss, and the adjustable vibrating mechanism includes a vibrating rod motor, a cantilever, a cantilever truss connector, a vibrating rod, a vertical movable electric cylinder and a horizontal movable electric cylinder; the cantilever truss connector includes a connecting plate and a rotating drum fixed to one side of the truss, a core shaft is arranged in the rotating drum, and bearing seats are arranged at the upper and lower ends of the connecting plate, and the two ends of the core shaft are arranged in the bearing seats, the vibrating rod is arranged at one end of the cantilever, and the other end of the cantilever is hinged to the outer wall of the rotating drum, and the output end of the vibrating rod motor is connected to the top end of the vibrating rod through a transmission hose; one end of the vertical movable electric cylinder is fixed to the outer wall of the rotating drum, and the protruding end of the piston rod at the other end is connected to the cantilever; one end of the horizontal movable electric cylinder is fixed to one side of the truss, and the protruding end of the piston rod at the other end is connected to the outer wall of the rotating drum.

2. The concrete vibrating and leveling machine for railway prefabricated box beams according to claim 1, characterized in that: The adjustable leveling mechanism is located at the bottom of the main frame and is symmetrically arranged in two groups along the main frame. Each group consists of a leveling adjustment wheel, a leveling roller, a leveling roller motor and a lifting bracket. The leveling rollers of the two groups of adjustable leveling mechanisms are parallel and staggered to form overlapping sections.

3. The concrete vibrating and leveling machine for railway prefabricated box beams according to claim 1 or 2, characterized in that: Both ends of the truss are configured as lifting brackets, and slide grooves are formed on the inner sides of the vertical frames on both sides of the door-shaped frame, and the two sides of the lifting bracket are embedded in the slide grooves; a screw rod is passed through the top of the lifting bracket; one end of the screw rod is fixed to the top of the door-shaped frame, and the other end is screwed to a threaded driver, and the threaded driver and its fixing seat are fixed to the two vertical inner walls of the lifting bracket.

4. The concrete vibrating and leveling machine for railway prefabricated box beams according to claim 3, characterized in that: The cantilever is composed of two parallel square tubes, and a vertical connecting seat plate, a horizontal connecting seat plate and a cantilever connecting seat plate are fixed on the outer wall of the rotating drum. The vibrating rod is fixed to one end of the cantilever by a clamp, and the other end of the cantilever is hinged to the cantilever connecting seat plate. One end of the vertical moving electric cylinder is connected to the vertical connecting seat plate, and the protruding end of the piston rod at the other end is connected to a square tube of the cantilever; one end of the horizontal moving electric cylinder is fixed to the seat plate on one side of the truss, and the protruding end of the piston rod at the other end is connected to the horizontal connecting seat plate.

5. The concrete vibrating and leveling machine for railway prefabricated box beams according to claim 4, characterized in that: The transverse chord, longitudinal chord, vertical rod and diagonal brace of the truss are welded together by square tubes, and a steel plate is laid on the top of the truss.

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