Large-span assembly type nose frame system

Abstract

The utility model discloses a large-span assembly type nose frame system which comprises a nose frame, a plurality of truss pieces connected with one another, a nose frame cross beam and a nose frame inclined strut, the truss pieces are symmetrically connected to the two ends of the nose frame cross beam, and the nose frame cross beam is installed and connected to the bottom of one end of each truss piece. The two nose frame cross beams are connected through a wind-resistant pull rod, the nose frame cross beams and the tops of the truss pieces are installed and connected through nose frame inclined struts, the length of the nose frame cross beams is set to be equal to the distance between the truss pieces at the two ends of the nose frame cross beams, the length of the nose frame cross beams is reduced, meanwhile, the height of the nose frame cross beams is reduced by one half, and the nose frame cross beams are more stable. By reducing the length and the height of the nose frame cross beam, the overall weight of the nose frame is reduced, assembling and erecting after assembling are facilitated under the condition that the requirement for supporting the truss pieces is met, meanwhile, supporting points are provided on the nose frame cross beam, the upper ends of the truss pieces are supported through the nose frame inclined struts, and the upper ends of the truss pieces are prevented from inclining outwards.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction, and particularly relates to a long-span assembled nose frame system. Background Art

[0002] In the construction of long-span bridges, it is necessary to assemble and lap the nose frame system before construction to facilitate subsequent construction. In the existing nose frame systems, the connection stability between most truss pieces is poor, and most of the truss pieces at both ends of the cross beam are located in the middle of the cross beam, so the required length of the cross beam is relatively long (as Figure 9 shown), which leads to a relatively large overall weight of the nose frame and affects the erection of the nose frame. Summary of the Utility Model

[0003] In order to solve the above problems existing in the prior art, the purpose of the utility model is to provide a long-span assembled nose frame system.

[0004] The technical solution adopted by the utility model includes:

[0005] A nose frame, including a nose frame cross beam, trusses are fixedly connected to both ends of the nose frame cross beam, the nose frame cross beam is located at the bottom of one end of the trusses, the trusses are formed by connecting multiple truss pieces, the two nose frame cross beams are connected by wind-resistant tie rods, and the nose frame cross beam and the top of the truss pieces are installed and connected by nose frame diagonal braces;

[0006] A support device for supporting the nose frame, including a base, a top column is arranged on the base, a top seat is arranged at the end of the top column far away from the base, the top seat is fixedly connected to the top column and is connected to the nose frame by a support rod.

[0007] Preferably, the two ends of the truss piece are respectively formed with a male head and a female head, the male head and the female head are adapted to each other, and the two truss pieces are detachably installed through the cooperation of the male head and the female head.

[0008] Preferably, the nose frame cross beam is in an H shape, its bottom is detachably connected to the bottom of the truss piece by bolts, a cross beam retaining piece is arranged on the top of the nose frame cross beam, the cross beam retaining piece is fixedly connected to the truss piece, and the two ends of the nose frame cross beam are flush with the trusses at its two ends respectively.

[0009] Preferably, diagonal brace supports are arranged on the top of the nose frame cross beam and the top of the nose frame, the diagonal brace supports are respectively fixedly connected to the nose frame cross beam and the truss piece, the nose frame diagonal brace is located between the two trusses at both ends of the nose frame cross beam, and its two ends are respectively hinged to the diagonal brace supports on the truss piece and the nose frame cross beam.

[0010] Preferably, a bridging connecting rod is provided between the female head and the male head, one end of the bridging connecting rod is adapted to the male head, and the other end is adapted to the female head.

[0011] Preferably, a support plate is provided at the top of the truss sheet, the support plate is fixedly connected to the truss sheet, and a support plate hole is formed on the support plate. There are a plurality of support plates, and the plurality of support plates are evenly distributed along the length direction of the truss sheet.

[0012] Preferably, support rod support shafts are symmetrically provided on the circumferential surface of the top column. One end of the support rod is hinged on the support rod support shaft, and the other end is hinged to the nose frame cross beam through a hinge seat.

[0013] Preferably, a chute is provided on the upper end surface of the top seat. A runner is detachably installed on the truss sheet, and the runner is adapted to the chute.

[0014] The beneficial effects of the present utility model are as follows:

[0015] As a large-span assembled nose frame system, the present utility model reduces the length of the nose frame cross beam by setting the length of the nose frame cross beam to be equal to the distance between the two truss sheets at both ends of the nose frame cross beam. At the same time, the height of the nose frame cross beam is reduced by one-half. The height and length of the nose frame cross beam meet the requirements for the support connection between the truss sheets. At the same time, by reducing its length and height, the overall weight of the nose frame is effectively reduced, which is convenient for assembly and erection on the roadbed after assembly. At the same time, support points are provided on the nose frame cross beam, and the upper end of the truss sheet is supported by using the nose frame diagonal brace to prevent the upper end of the truss sheet from tilting outwards, further improving the support stability of the nose frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further describes the present utility model in detail with reference to the drawings and specific implementation methods.

[0017] Figure 1 is a schematic structural view of the present utility model;

[0018] Figure 2 is a front view structural schematic diagram of the present utility model;

[0019] Figure 3 is the Figure 1 magnified structural schematic diagram at position A of the present utility model;

[0020] Figure 4 is a partial structural schematic diagram of the present utility model;

[0021] Figure 5 is a structural schematic diagram of a part of the truss sheet and the support device of the present utility model;

[0022] Figure 6 is a schematic structural view of the support device of the present utility model;

[0023] Figure 7 is the present utility model Figure 6 front view structural schematic diagram;

[0024] Figure 8 is the present utility model Figure 4 magnified structural schematic diagram at position B;

[0025] Figure 9 is a schematic structural view of the prior art of the present utility model.

[0026] In the figure: 1, nose bridge; 2, support device; 11, truss sheet; 12, nose bridge cross beam; 13, nose bridge diagonal brace; 14, wind-resistant tie rod; 15, truss; 111, male head; 112, female head; 113, erection connecting rod; 114, support plate; 115, diagonal brace support; 116, pulley; 117, pin; 118, support plate hole; 121, tie rod support; 122, cross beam baffle; 21, base; 22, top column; 23, top seat; 24, support rod; 221, support rod support shaft; 231, chute. Detailed implementation manners

[0027] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0028] Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but only represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present utility model.

[0029] The following is combined with Figures 1-8Describe the specific implementation of the present utility model. A large-span prefabricated nose frame system includes: a nose frame 1, which includes a plurality of connected truss pieces 11, a nose frame cross beam 12, and a nose frame 1 diagonal brace. The nose frame 1 forms a truss by a plurality of truss pieces 11 connected end to end in sequence. The formed trusses are symmetrically distributed at both ends of the nose frame cross beam 12. The two ends of the nose frame cross beam 12 are symmetrically connected to the truss pieces 11. The nose frame cross beam 12 is installed and connected to the bottom of one end of the truss piece 11. The two nose frame cross beams 12 are connected by a nose frame 1 tie rod. The nose frame cross beam 12 and the top of the nose frame 1 are installed and connected by a nose frame 1 diagonal brace. On the one hand, the nose frame cross beam 12 is detachably installed on the upper end surface of the truss piece 11 by bolts. At the same time, the side surface of the nose frame cross beam 12 is connected to the nose frame 1 diagonal brace. The length of the nose frame cross beam 12 is the installation distance length between two trusses. And the nose frame 1 diagonal brace is installed and connected between two trusses. In addition to realizing the stable support of the nose frame cross beam 12 for the truss piece 11, since the length of the nose frame cross beam 12 is shortened, the overall self-weight of the truss piece 11 is reduced. At the same time, the nose frame 1 diagonal brace is used to support the truss piece 11 to improve the connection stability between the nose frame cross beam 12 and the truss piece 11.

[0030] A support device 2 for supporting the nose frame 1, which includes a base 21. A top column 22 is provided on the base 21. A top seat 23 is provided at the end of the top column 22 away from the base 21. The top seat 23 is movably connected to the top column 22 and is connected to the nose frame 1 through a support rod 24. The lower end of the base 21 fits the ground. The top column 22 is installed at the center of the base 21. The top seat 23 is fixedly connected to the top of the top column 22. The top seat 23 always fits the lower end surface of the nose frame 1 to realize the support of the nose frame 1. Among them, a support rod 24 is arranged on the peripheral surface of the top column 22. The two ends of the support rod 24 are respectively connected to a support rod support shaft 221 and the nose frame cross beam 12. The support rod 24 improves the support stability of the support device 2 for the nose frame 1.

[0031] Please refer to Figure 1 、 4 As shown in FIGS. 5, the two ends of the truss piece 11 respectively form a male head 111 and a female head 112. The male head 111 and the female head 112 are adapted to each other. The two truss pieces 11 are detachably installed through the cooperation of the male head 111 and the female head 112. The truss is formed by connecting a plurality of truss pieces 11. By inserting the male head 112 of one truss piece 11 into the female head 111 of another truss piece 11 and inserting a pin 117 into the male head 111 and the female head 112, the formation of the truss is realized. Then, the two trusses are respectively installed and connected to both ends of the nose frame cross beam 12, and finally the formation of the nose frame 1 is realized.

[0032] Please refer to Figures 1-5As shown, the nose bridge crossbeam 12 is in an H shape, and its bottom is detachably connected to the bottom of the truss sheet 11 through bolts, realizing the convenient assembly and disassembly between the nose bridge crossbeam 12 and the truss sheet 11. A crossbeam retaining piece 122 is provided at the top of the nose bridge crossbeam 12, and the crossbeam retaining piece 122 is fixedly connected to the truss sheet 11. The bottom of the nose bridge crossbeam 12 is fixedly connected to the truss sheet 11 through bolts. At the same time, a crossbeam retaining piece 122 is installed at the top of the nose bridge crossbeam 12, and the crossbeam retaining piece 122 is fixedly connected to the nose bridge crossbeam 12 to improve the stability of the installation connection between the nose bridge crossbeam 12 and the truss sheet 11. The two ends of the nose bridge crossbeam 12 are respectively flush with the trusses at its two ends, so that the length of the nose bridge crossbeam 12 on the nose bridge 1 is the distance between two trusses. On the one hand, it realizes the stable assembly of the nose bridge 1, and on the other hand, it reduces the overall weight of the nose bridge 1 system and improves the stable support for the nose bridge 1. In the prior art, the nose bridge crossbeam 12 is a standard crossbeam with a large self-weight, and a large counterweight is required to ensure the stable moment, and it is difficult to find a counterweight on site. In this embodiment, by reducing the height of the nose bridge crossbeam 12 by half, the self-weight of the nose bridge crossbeam is reduced, and the counterweight required to ensure the stable moment is greatly reduced, which is not only convenient for on-site bridge erection but also improves the safety of erection.

[0033] Please refer to Figure 4 、 5 As shown in FIGS. 7 and 8, diagonal support seats 115 are provided at the top of the nose bridge crossbeam 12 and the top of the nose bridge 1. The diagonal support seats 115 are respectively fixedly connected to the nose bridge crossbeam 12 and the truss sheet 11. The nose bridge diagonal support is located between the two trusses at the two ends of the nose bridge crossbeam 12 and is used for the upper end tension between the nose bridge crossbeam 12 and the truss sheet 11 to improve the stability of the connection between multiple truss sheets 11, and its two ends are respectively hinged to the diagonal support seats 115 on the truss sheet 11 and the nose bridge crossbeam 12, realizing the support and connection of the nose bridge diagonal support on the nose bridge 1.

[0034] Please refer to Figures 2-3 As shown, an erection connecting rod 113 is provided between the female head 111 and the male head 112. One end of the erection connecting rod 113 is adapted to the male head 112, and the other end is adapted to the female head 111. In actual construction, there are different height trends on the ground, which will inevitably cause an angle to be formed between two truss sheets 11. By connecting the upper ends of the two truss sheets 11 with the female head 111 and the male head 112, and adding an erection connecting rod 113 between the female head 111 and the male head 112 at the lower end of the truss sheet 11, the length after the lower end connection is changed, and the connection between the truss sheets 11 forms an angle to meet the assembly requirements of the truss sheet 11.

[0035] Please refer to Figures 1-4As shown, a support plate 114 is provided at the top of the truss piece 11. The support plate 114 is fixedly connected to the truss piece 11, and a support plate hole 118 is formed on the support plate 114. There are multiple support plates 114, and the multiple support plates 114 are evenly distributed along the length direction of the truss piece 11. The multiple support plates 114 are used to build a working support platform. The support plates 114 are fixedly connected above each truss piece 11. By assembling and connecting the working platform with each support plate 114, the construction of the working platform is realized.

[0036] Please refer to Figures 5-7 As shown, support rod support shafts 221 are symmetrically provided on the circumferential surface of the top column 22. One end of the support rod 24 is hinged to the support rod support shaft 221, and the other end is hinged to the nose frame cross beam 12 through a hinge seat. By hinging one end of the support rod 24 to the support rod support shaft 221 and the other end to the nose frame cross beam 12 through a hinge seat, the stability of the support of the support device 2 for the nose frame 1 is improved. In some embodiments, the shape of the support rod 24 can be an H-shaped steel or other shapes. In this embodiment, the support rod 24 is a circular rod, and the circular rods can be in threaded fit. The length of the support rod 24 can be adjusted through the fit between the threads to meet the requirements of different supports.

[0037] Please refer to Figure 2 、 6 As shown, a chute 231 is provided on the upper end surface of the top seat 23. A runner is detachably installed on the truss piece 11, and the runner is adapted to the chute 231. In the installation and construction of the nose frame 1, the nose frame 1 is mostly assembled first, then the support device 2 is built, and then the nose frame 1 is manually pushed to each support device 2 for support. By opening a chute 231 on the upper end surface of the top seat 23, and at the same time, a runner adapted to the chute 231 is rotatably provided at the bottom of the nose frame 1, it is convenient to push the nose frame 1. After being pushed to the appropriate position, the runner can be disassembled, and the bottom of the nose frame 1 and the top seat 23 can be locked in position by using bolts to realize the construction of the nose frame 1.

[0038] The working principle of the present utility model:

[0039] By assembling and connecting multiple truss pieces 11, by inserting the male head 112 at one end of one truss piece 11 into the female head 111 of another truss piece 11 and using a pin 117 to connect between the female head 111 and the male head 112, the assembly connection between two truss pieces 11 is realized to form a truss. In this way, multiple truss pieces 11 are connected to form a truss, and two groups of trusses are prepared;

[0040] Connect the nose frame cross beam 12 at the bottoms of two trusses. The nose frame cross beam 12 is fixedly connected to the bottom of the truss piece 11 by bolts, and the two trusses are located at both ends of the nose frame cross beam 12, so as to support and connect the trusses on both sides of it. At the same time, nose frame 1 tie rods are staggeredly arranged between the two truss pieces 11 on both sides of the nose frame cross beam 12. The nose frame 1 tie rods are distributed in a cross shape and are used for supporting the bottoms of the two truss pieces 11. At the same time, a nose frame 1 diagonal brace is arranged at the top of the truss piece 11, so that one end of the nose frame 1 diagonal brace is hinged to the top of the truss piece 11 and the other end is hinged to the cross beam, realizing the support of the truss piece 11, preventing the upper end of the truss piece 11 from tilting outwards, improving the support for the truss piece 11, and making the nose frame 1 diagonal brace located between the two truss pieces 11 at both ends of the nose frame cross beam 12. Furthermore, the outward extension length of the nose frame cross beam 12 can be reduced, and the overall weight of the nose frame 1 is further reduced;

[0041] After the assembly of the nose frame 1 is completed, a plurality of support devices 2 are arranged on the supporting ground. Among them, the base 21 in the support device 2 serves as a support platform, and the top column 22 is fixedly connected to the exact center of the base 21. Set the height of the top column 22. By making the top of the top seat 23 fit with the bottom of the nose frame 1, the stable support of the nose frame 1 is realized. At the same time, two support rods 24 are hinged on the support rod support shaft 221 fixedly arranged on the circumferential surface of the top column 22, so that one end of the support rod 24 is hinged to the support rod support shaft 221 and the other end is hinged to the nose frame cross beam 12, so as to improve the support stability of the support device 2 for the nose frame 1.

[0042] After the support devices 2 are arranged, wheels are installed at the bottom of the truss piece 11. By pushing the nose frame 1 along the sliding groove 231 provided on the top seat 23, the nose frame 1 is pushed through each support device 2 in turn. The rotation of the wheels on the sliding groove 231 reduces the applied force required when pushing the nose frame 1. Finally, the movement of the nose frame 1 on the support device 2 is realized. After the nose frame 1 is pushed to the required position, the wheels can be disassembled, and then the relative positions of the nose frame 1 and the top seat 23 are locked by using bolts. Finally, the construction of the nose frame 1 is completed.

[0043] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] The above content is only an example and explanation of the structure of the present utility model. Those skilled in the art to which the present technology pertains can make various modifications or supplements to the described specific embodiments, or use similar methods for substitution, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims of the present application, they should all fall within the protection scope of the present utility model.

Claims

1. A large-span assembled nose frame system, characterized in that: include: A nose frame, comprising a nose frame crossbeam, both ends of the nose frame crossbeam are fixedly connected with a truss, the nose frame crossbeam is located at the bottom of one end of the truss, the truss is formed by connecting a plurality of truss pieces, two nose frame crossbeams are connected by a windproof pull rod, and the nose frame crossbeam is connected to the top of the truss piece by a nose frame diagonal brace; A supporting device, used for supporting the nose bridge, comprises a base, a top column is arranged on the base, a top seat is arranged at one end of the top column away from the base, the top seat is fixedly connected to the top column and connected to the nose bridge through a support rod.

2. A large-span assembled nose frame system according to claim 1, characterized in that: The two ends of the truss piece are respectively formed with a female head and a male head, the female head and the male head are adapted to each other, and the two truss pieces can be detachably installed through the cooperation of the female head and the male head.

3. A large-span assembled nose bridge system according to claim 2, characterized in that: The nose bridge crossbeam is H-shaped, and its bottom is detachably connected to the bottom of the truss piece by bolts. A crossbeam baffle is provided on the top of the nose bridge crossbeam, and the crossbeam baffle is fixedly connected to the truss piece. The two ends of the nose bridge crossbeam are respectively flush with the trusses at both ends.

4. A large-span assembled nose bridge system according to claim 3, characterized in that: The top of the nose bridge crossbeam and the top of the nose bridge are provided with diagonal brace supports, and the diagonal brace supports are fixedly connected to the nose bridge crossbeam and the truss piece respectively. The nose bridge diagonal brace is located between the two trusses at both ends of the nose bridge crossbeam, and its two ends are respectively hinged to the truss piece and the diagonal brace supports on the nose bridge crossbeam.

5. The large-span assembled nose bridge system according to claim 2, characterized in that: A mounting connecting rod is arranged between the female connector and the male connector, one end of the mounting connecting rod is matched with the male connector, and the other end of the mounting connecting rod is matched with the female connector.

6. The large-span assembled nose bridge system according to claim 1, characterized in that: A support plate is provided on the top of the truss piece, the support plate is fixedly connected to the truss piece, and support plate holes are formed on the support plate. There are multiple support plates, and the multiple support plates are evenly distributed along the length direction of the truss piece.

7. A large-span assembled nose bridge system according to claim 6, characterized in that: The top column is symmetrically provided with a support rod support shaft on its circumference, one end of the support rod is hinged on the support rod support shaft, and the other end is hinged to the nose bridge cross beam through a hinge seat.

8. The large-span assembled nose bridge system according to claim 1, characterized in that: A slide groove is arranged on the upper end surface of the top seat, and a rotating wheel is detachably mounted on the truss piece, and the rotating wheel is adapted to the slide groove.

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