Steel box girder and its installation construction method

Abstract

The present invention discloses a steel box girder and an installation and construction method thereof, wherein the steel box girder comprises: a plurality of steel box girder assemblies, a positioning mechanism and a driving mechanism. The installation and construction method of the steel box girder comprises: positioning and installing any steel box girder assembly in a designated area, hoisting the second steel box girder assembly until it is flush with the previous steel box girder assembly; installing the driving mechanism and the positioning mechanism, and aligning the alignment holes at the connection of the two steel box girder assemblies; consolidating the two aligned steel box girder assemblies, removing the positioning mechanism and the driving structure, and putting them into use in the alignment work of the next steel box girder assembly. The present invention uses a plurality of positioning members to sequentially align two adjacent steel box girder assemblies, has a reasonable structural design, is easy to operate, and the positioning mechanism and the driving mechanism are reusable, saving resources.

Description

Technical Field

[0001] The present invention relates to the technical field of steel box girder construction, and more particularly to a steel box girder and an installation and construction method thereof. Background Art

[0002] Steel box girders, also known as steel plate box girders, are a common structural form for long-span bridges. They are generally used on bridges with larger spans. Because they look like a box, they are called steel box girders. In long-span cable-supported bridges, they are generally manufactured and installed in several beam sections. In existing technologies, the installation of steel box girders usually involves lifting the steel box girders to the installation position with a crane, and then manually operating a machine to pull and align the steel box girders. The girders are then stabilized by welding or pouring, and the remaining steel box girders are then installed in the same manner. However, during the installation process, the steel box girders are lifted by a crane, and deviations may occur during installation. A large amount of manpower and time are required to position the steel box girders in the appropriate position, reducing work efficiency. The patent with authorization number CN113235399B discloses a positioning and splicing steel box girder, which designs a support device and a positioning device for positioning and splicing the steel box girders, but still has problems such as large structural volume and inconvenient operation. Summary of the Invention

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0004] Another object of the present invention is to provide a steel box girder and an installation construction method thereof, which uses a positioning mechanism to align adjacent steel box girder components, has a simple structure, occupies a small area, and is easy to operate.

[0005] In order to achieve these objects and other advantages of the present invention, there is provided a steel box girder comprising:

[0006] A plurality of steel box girder assemblies, each of which is provided with a plurality of regular polygonal alignment holes extending leftward and rightward;

[0007] The cam is connected to the drive shaft by the spring, and the cam is connected to the drive shaft by the spring.

[0008] The driving mechanism is provided with a mounting plate, on which two brackets are mounted, a worm is rotatably mounted between the two brackets, the worm is meshed and rotated with a plurality of worm wheels, and one end of the worm wheel rotates through any bracket to be connected to a motor;

[0009] Among them, the mounting plate can be detachably installed on one side of any steel box girder assembly, and multiple positioning parts are inserted from the alignment holes of this steel box girder assembly to the alignment holes of the adjacent steel box girder assembly, and the limiting parts and limiting cards are embedded in the alignment holes on the other side of the adjacent steel box girder assembly to prevent it from rotating.

[0010] Preferably, the fixing rod, the fixing ring and the connecting rod of any positioning member are coaxially arranged and have the same outer diameter.

[0011] Preferably, the diameter of the worm wheel is greater than the side length of the alignment hole, and greater than the diameters of the fixing rod, the fixing ring and the connecting rod.

[0012] Preferably, the diameter of the cylinder formed by rotating and closing the plurality of blades is the same as the diameter of the fixing rod, the fixing ring and the connecting rod.

[0013] Preferably, the first rotation axis and the second rotation axis at both ends of each fan blade are symmetrical to each other and close to the side walls of the fixing rod and the fixing ring.

[0014] Preferably, the alignment hole is a square structure, and the limiting member is a rectangular parallelepiped structure matching the alignment hole.

[0015] Preferably, each steel box girder assembly is provided with two left and right through-holes, and the positioning mechanism includes two positioning members.

[0016] Preferably, the fixing rod and the connecting rod are both electric telescopic rods.

[0017] The present invention also provides a method for installing and constructing a steel box girder, comprising the following steps:

[0018] Step 1: Position and install any steel box girder assembly in the designated area, and lift the second steel box girder assembly until it is flush with the previous steel box girder assembly;

[0019] Step 2: Position the mounting plate with the motor, bracket and worm gear installed and install it below the two alignment holes on the outside of the second steel box girder assembly, and pass the two positioning pieces through the alignment holes of the second steel box girder and the alignment holes of the previous steel box girder assembly in sequence, so that the worm wheels at the ends of the two connecting rods are engaged with the worm gear, and the fixing rod and the connecting rod are extended so that the fan blade part of each positioning piece is located in the alignment holes of the two steel box girder assemblies that are close to and connected to each other. At the same time, the limiting piece of each positioning piece is limited and accommodated in the alignment hole on the other side of the previous steel box girder assembly. The motor drives the worm gear to rotate, driving the two connecting rods to rotate synchronously, and then drives the multiple blades to rotate synchronously outward through the meshing gears and annular racks, and aligns the alignment holes at the connection of the two steel box girder assemblies;

[0020] Step 3: Consolidate the two aligned steel box girder assemblies, remove the positioning mechanism and drive structure, and put them into use for the alignment work of the next steel box girder assembly.

[0021] The present invention has at least the following beneficial effects:

[0022] First, the steel box beam of the present invention is provided with a plurality of rotatable blades. The blades are closed to form a cylindrical shape. The plurality of blades rotate and unscrew synchronously, and can simultaneously abut against multiple positions of the alignment holes, so that the alignment holes on the two steel box beam components are positioned and docked, thereby improving positioning accuracy.

[0023] Second, the installation and construction method of the steel box girder of the present invention is easy to operate, and the positioning mechanism and the driving mechanism can be reused, which saves resources and reduces costs.

[0024] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a technical solution of the present invention;

[0026] Figure 2 This is a cross-sectional view of a positioning member when multiple fan blades are closed in one technical solution of the present invention;

[0027] Figure 3 This is a cross-sectional view of a positioning member when multiple fan blades are unfolded in a technical solution of the present invention;

[0028] Figure 4This is a schematic structural diagram of a positioning rod and a connecting rod in a technical solution of the present invention;

[0029] Figure 5 It is a structural schematic diagram of a positioning member in a technical solution of the present invention. DETAILED DESCRIPTION

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0031] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0032] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The orientations or positional relationships indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0033] like Figures 1 to 5 As shown, the present invention provides a steel box girder, comprising:

[0034] A plurality of steel box beam assemblies 100, each of which is provided with a plurality of regular polygonal alignment holes 101 extending leftward and rightward;

[0035] The positioning mechanism includes a plurality of positioning members, each of which includes a positioning rod and a connecting rod 200 that are coaxially connected and rotated. The positioning rod includes a fixed rod 201, a fixed ring 202, and a plurality of fan blades 203 that are rotatably arranged between the two. A plurality of support rods 209 are axially fixed between the fixed rod 201 and the fixed ring 202. One end of each fan blade 203 is provided with a first rotating shaft that is rotatably connected to the circular end of the fixed rod 201, and the other end is provided with a second rotating shaft that rotates through the fixed ring 202. The ends of the second rotating shaft of each fan blade 203 are fixedly connected to the fixed rod 201. There is a gear 204, and multiple blades 203 rotate around the axis and close together to form a complete cylindrical shape. The end of the connecting rod 200 close to the fixed ring 202 is provided with an annular ridge 205, and the inner wall of the ridge is provided with an annular rack 206. The ridge is coaxially connected to the fixed ring 202, and the annular rack 206 is arranged around the outer periphery of the multiple gears 204 and meshes with the multiple gears 204. The end of each fixing rod 201 away from the fixed ring 202 is provided with a limit member 207, and the end of each connecting rod 200 away from the positioning rod is provided with a worm gear 208;

[0036] The drive mechanism is provided with a mounting plate 300, on which two brackets 301 are mounted. A worm 302 is rotatably mounted between the two brackets 301. The worm 302 rotates in mesh with multiple worm gears 208, and one end of the worm gear 208 rotates through any bracket 301 and is connected to a motor 303;

[0037] Among them, the mounting plate 300 can be detachably installed on one side of any steel box girder assembly 100, and multiple positioning members are inserted from the alignment hole 101 of this steel box girder assembly into the alignment hole 101 of the adjacent steel box girder assembly, and the limiting member 207 limit card is embedded in the alignment hole 101 on the other side of the adjacent steel box girder assembly to prevent it from rotating.

[0038] In the present technical solution, the steel box girder includes a plurality of steel box girder components 100, a positioning mechanism and a driving mechanism, wherein a plurality of positioning holes that penetrate each other are opened on the left and right sides of each steel box girder component 100, and the positioning holes are regular polygonal structures. The positioning mechanism includes a plurality of positioning members that are parallel to each other and penetrate into the alignment holes 101 of the two steel box girder components, and each positioning member includes a positioning rod and a connecting rod 200 that are coaxially connected. The positioning rod includes a fixed rod 201 and a fixed ring 202, and a plurality of mutually parallel support rods 209 are connected between the fixed rod 201 and the fixed ring 202. The plurality of support rods 209 are parallel to the axes of the fixed rod 201 and the fixed ring 202, and the plurality of support rods 209 are close to the side walls of the fixed rod 201 and the fixed ring 202, and the fixed rod 201 and the fixed ring 202 are connected. A plurality of fan blades 203 are rotatably mounted. Each fan blade 203 is provided with a first rotating shaft and a second rotating shaft at both ends near the fixed rod 201 and the fixed ring 202. The first rotating shaft is rotatably connected to the circular end of the fixed rod 201. The second rotating shaft rotates through the annular wall of the fixed ring 202 and is fixed to a gear 204. The rotation of the gear 204 can drive the fan blades 203 to rotate. The plurality of fan blades 203 are closed to form a cylindrical shape and unfolded to form a structure with a flower-shaped cross-section. The end of the connecting rod 200 near the fixed ring 202 is provided with an annular ridge 205. The curved inner wall of the ridge 205 is provided with an annular rack 206. The ridge 205 is connected to the annular wall of the fixed ring 202 near each other by a bearing. The annular rack 206 is arranged around the outer side of the plurality of gears 204 and meshes with the plurality of gears 204 for rotation. A limit member 207 is provided at the other end of the fixed rod 201. The limit member 207 is arranged in the alignment hole 101 to limit the rotation of the fixed rod 201. A worm gear 208 is coaxially mounted on the other end of the connecting rod 200. The drive mechanism includes a mounting plate 300, on which two brackets 301 are mounted. A worm gear 302 is rotatably mounted between the two brackets 301, and one end of the worm gear 302 is connected to a motor 303. The mounting plate 300 is removably fixed to one side of the steel box girder assembly and positioned below multiple alignment holes 101. Multiple positioning members are inserted into the alignment holes 101 in corresponding positions. Multiple worm gears 208 are positioned outside the alignment holes 101 and mesh with the worm gears 302. In this technical solution, meshing gears 204 and racks, as well as worm wheels 208 and worms 302 are provided. The rotation of the worm 302 drives the two connecting rods 200 to rotate synchronously. The rotation of the connecting rod 200 drives multiple blades 203 to extend simultaneously. The edges of multiple blades 203 abut against different inner walls of the alignment hole 101, thereby achieving the purpose of precise positioning and improving the accuracy of alignment; the limiter 207 is located in the alignment hole 101 to prevent the fixed rod 201 from rotating, making it easier for the connecting rod 200 to drive the blades 203 to unfold, thereby improving the structural stability; the positioning mechanism and the drive rod mechanism can be disassembled and reused, saving resources and reducing construction costs.

[0039] In another technical solution, the fixing rod 201, fixing ring 202, and connecting rod 200 of any positioning member are coaxially arranged and have the same outer diameter. In this technical solution, the diameters of the fixing rod 201, fixing ring 202, and connecting rod 200 are the same, which facilitates smooth insertion into the alignment hole 101.

[0040] In another technical solution, the diameter of the worm wheel 208 is larger than the side length of the alignment hole 101 and larger than the diameters of the fixing rod 201, the fixing ring 202, and the connecting rod 200. In this technical solution, the worm wheel 208 is located in the alignment hole 101, and its diameter is larger than the size of the alignment hole 101 to prevent it from accidentally slipping into the alignment hole 101.

[0041] In another technical solution, the diameter of the cylinder formed by the rotation and closure of the multiple blades 203 is the same as the diameter of the fixing rod 201, the fixing ring 202, and the connecting rod 200. In this technical solution, the multiple blades 203 are closed to form a cylinder with the same diameter as the fixing rod 201. The multiple blades 203 are simultaneously unfolded, and their edges extend beyond the edges of the fixing rod 201 and the fixing ring 202, facilitating multi-directional contact with the inner wall of the alignment hole 101, thereby improving positioning accuracy.

[0042] In another technical solution, the first and second rotation axes at both ends of each blade 203 are symmetrical to each other and are located near the sidewalls of the fixing rod 201 and the fixing ring 202. In this technical solution, the first and second rotation axes are symmetrically arranged at both ends of the blade 203 and near one corner of the blade 203, so that the multiple blades 203 can be closed to form a cylindrical shape and unfolded to form a flower-shaped cross-section, which facilitates the precise positioning of the positioning holes.

[0043] In another technical solution, the alignment hole 101 is a square structure, and the stopper 207 is a rectangular parallelepiped structure that matches the alignment hole 101. In this technical solution, the alignment hole 101 has a square cross-section, and the stopper 207 is a rectangular parallelepiped structure with a square cross-section. The cross-sectional dimensions of the stopper 207 are smaller than those of the alignment hole 101, which facilitates the insertion of the stopper 207 while preventing the fixing rod 201 from rotating.

[0044] In another technical solution, each steel box girder assembly 100 is provided with two left and right through alignment holes 101, and the positioning mechanism includes two positioning members. In this technical solution, there are two alignment holes 101 and two positioning members, which facilitates the precise positioning of the two steel box girder assemblies 100.

[0045] In another technical solution, both the fixed rod 201 and the connecting rod 200 are electrically telescopic rods. In this technical solution, both the fixed rod 201 and the connecting rod 200 are electrically telescopic rods, which can be configured as mutually interlocking sleeves and cannulas, and the telescopic structure driven by a hydraulic cylinder facilitates adjustment of the length of the positioning member, so that the fan-shaped portion is accurately positioned within the two opposing alignment holes 101, and the limit member 207 is accurately positioned within the corresponding alignment hole 101. The adjustable length of the fixed rod 201 and the connecting rod 200 facilitates transportation and storage, and is suitable for use with steel box girder assemblies 100 of different sizes, thereby improving the applicability of the device.

[0046] The present invention also provides a method for installing and constructing a steel box girder, comprising the following steps:

[0047] Step 1: Position and install any steel box girder assembly 100 in the designated area, and lift the second steel box girder assembly 100 until it is flush with the previous steel box girder assembly 100;

[0048] Step 2: Position the mounting plate 300 with the motor 303, bracket 301 and worm 302 installed below the two alignment holes 101 on the outside of the second steel box beam assembly, and pass the two positioning pieces through the alignment holes 101 of the second steel box beam and the alignment holes 101 of the previous steel box beam assembly in sequence, so that the worm wheels 208 at the ends of the two connecting rods 200 engage with the worm 302, and the fixing rod 201 and the connecting rod 200 are extended so that the fan blade 203 part of each positioning piece is located at The two steel box beam assemblies 100 are close to each other and docked in the alignment holes 101. At the same time, the limiting member 207 of each positioning member is limited and accommodated in the alignment hole 101 on the other side of the previous steel box beam assembly. The motor 303 drives the worm 302 to rotate, driving the two connecting rods 200 to rotate synchronously. Then, through the meshing gear 204 and the annular rack 206, the multiple blades 203 are driven to rotate synchronously outward to align the alignment holes 101 at the connection of the two steel box beam assemblies 100.

[0049] Step 3: consolidate the two aligned steel box girder assemblies 100, remove the positioning mechanism and the driving structure, and put them into use in the alignment work of the next steel box girder assembly.

[0050] In this technical solution, first, according to the actual construction method, the installation base and other infrastructure are established, and a temporary steel box girder support is installed. The steel box girder assembly 100 is lifted and installed on the base by a crane, and another steel box girder assembly is lifted until it is roughly flush with the previous steel box girder assembly. The driving mechanism is fixed to the outside of the second steel box girder assembly by bolts or other detachable means, and the positioning mechanism is extended into the alignment hole 101 to adjust the alignment. After the alignment is completed, the second steel box girder is supported by a temporary support, and the two steel box girder assemblies 100 are fixed and docked by welding or casting. After the fixing is completed, the driving mechanism and the positioning mechanism are removed to position the next steel box girder assembly. This process is repeated to complete the installation and construction process of the steel box girder. The installation and construction method of the steel box girder described in this technical solution is simple to operate and has precise alignment. Both the positioning assembly and the driving assembly can be disassembled and reused, which saves resources and construction costs.

[0051] The number of devices and processing scales described herein are intended to simplify the description of the present invention. Applications, modifications, and variations of the present invention will be readily apparent to those skilled in the art.

[0052] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. 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 illustrations shown and described herein.

Claims

1. Steel box girder, characterized in that, include: A plurality of steel box girder assemblies, each of which is provided with a plurality of regular polygonal alignment holes extending leftward and rightward; The axle up and down groove at two ends embeds respectively in two guide rails up and down of being made up of the groove on the attachment piece, and the tooth on the attachment piece is meshed with tooth on upper sprocket wheel, the lower sprocket. The tooth on the attachment piece is meshed with tooth on upper sprocket. The driving mechanism is provided with a mounting plate, on which two brackets are mounted, a worm is rotatably mounted between the two brackets, the worm is meshed and rotated with a plurality of worm wheels, and one end of the worm wheel rotates through any bracket to be connected to a motor; The mounting plate is detachably mounted on one side of any steel box girder assembly, and a plurality of positioning members are inserted from the alignment hole of the steel box girder assembly to the alignment hole of the adjacent steel box girder assembly, and the limiting member limit card is embedded in the alignment hole on the other side of the adjacent steel box girder assembly to prevent it from rotating; The fixing rod and the connecting rod are both electrically operated telescopic rods, which are used to adjust the length of the positioning member so that the fan blade portion is accurately positioned in the alignment hole of the two steel box beam assemblies; The alignment hole is a square structure, and the limiting piece is a rectangular parallelepiped structure matching the alignment hole to limit the rotation of the fixing rod.

2. The steel box girder according to claim 1, characterized in that: The fixing rod, fixing ring and connecting rod of any positioning member are coaxially arranged and have the same outer diameter.

3. The steel box girder according to claim 2, characterized in that: The diameter of the worm wheel is greater than the side length of the alignment hole, and is greater than the diameters of the fixing rod, the fixing ring and the connecting rod.

4. The steel box girder according to claim 3, characterized in that: The diameter of the cylinder formed by the rotation and closure of the plurality of blades is the same as the diameters of the fixing rod, the fixing ring and the connecting rod.

5. The steel box girder according to claim 1, characterized in that: The first rotating shaft and the second rotating shaft at two ends of each fan blade are symmetrical to each other and close to the side walls of the fixing rod and the fixing ring.

6. The steel box girder according to claim 1, characterized in that: Each steel box beam assembly is provided with two left and right penetrating alignment holes, and the positioning mechanism includes two positioning pieces.

7. The method for installing and constructing a steel box girder according to any one of claims 1 to 6, wherein: The following steps are involved: Step 1: Position and install any steel box girder assembly in the designated area, and lift the second steel box girder assembly until it is flush with the previous steel box girder assembly; Step 2: Position the mounting plate with the motor, bracket and worm gear installed and install it below the two alignment holes on the outside of the second steel box girder assembly, and pass the two positioning pieces through the alignment holes of the second steel box girder and the alignment holes of the previous steel box girder assembly in sequence, so that the worm wheels at the ends of the two connecting rods are engaged with the worm gear, and the fixing rod and the connecting rod are extended so that the fan blade part of each positioning piece is located in the alignment holes of the two steel box girder assemblies that are close to and connected to each other. At the same time, the limiting piece of each positioning piece is limited and accommodated in the alignment hole on the other side of the previous steel box girder assembly. The motor drives the worm gear to rotate, driving the two connecting rods to rotate synchronously, and then drives the multiple blades to rotate synchronously outward through the meshing gears and annular racks, and aligns the alignment holes at the connection of the two steel box girder assemblies; Step 3: Consolidate the two aligned steel box girder assemblies, remove the positioning mechanism and drive structure, and put them into use for the alignment work of the next steel box girder assembly.

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