Layered steel box girder

Abstract

This utility model discloses a layered steel box girder, relating to the field of steel box girder technology. The layered steel box girder includes multiple beam segments, each segment comprising: a base plate; a connecting sleeve and a connecting rod, located at opposite ends of the base plate along its length. The connecting sleeve is fixedly connected to the base plate, and the connecting rod is movably mounted on the base plate along its length. The end of the connecting rod away from the connecting sleeve has a reduced cross-section to form a contraction section. A locking assembly, corresponding to the connecting rod, allows for axial relative movement between the connecting rod and the connecting sleeve. The contraction section facilitates the insertion of the connecting rod into the connecting sleeve. Finally, the locking and the engaging parts work together to align and fix adjacent beam segments, facilitating further welding of adjacent beam segments. Overall, this improves the problem of inconvenient connection between two beam segments.

Description

Technical Field

[0001] This utility model relates to the field of steel box girder technology, and in particular to a layered steel box girder. Background Technology

[0002] Layered steel box girders are a common type of steel box girder, widely used in long-span bridges. A typical layered steel box girder consists of sequentially arranged beam segments, each including a top plate, bottom plate, outer connecting plates, and a web plate. The top and bottom plates are parallel. There are two outer connecting plates; the upper side of one outer connecting plate connects to the lower side of the top plate, and the lower side of the other connects to the upper side of the bottom plate. The distance between the two outer connecting plates gradually decreases from top to bottom. The web plate connects the top and bottom plates and is located between the two outer connecting plates. There are two web plates, forming a channel between them. During hoisting, the beam segments need to be assembled and connected with the previously hoisted segment, and then the aligned segments are welded together, making the connection of beam segments relatively inconvenient. Utility Model Content

[0003] The main purpose of this invention is to propose a layered steel box girder, which aims to improve the problem of inconvenience in connecting two girder segments.

[0004] To achieve the above objectives, the present invention proposes a layered steel box girder, comprising multiple beam segments, each beam segment including:

[0005] Base plate;

[0006] A docking cylinder and a docking rod are located at opposite ends of the base plate along its length. The docking cylinder is fixedly connected to the base plate, and the docking rod is movably mounted on the base plate along its length. The extension direction of the docking cylinder is the same as that of the docking rod, and both extend along the length of the base plate. The cross-section of the end of the docking rod furthest from the docking cylinder is reduced to form a contraction section.

[0007] The locking assembly includes a locking part and a mating part that cooperate with each other, wherein one of the locking part and the mating part is provided in the docking cylinder and the other is provided in the docking rod;

[0008] In two adjacent beam segments, the connecting rod on the rear beam segment is used to insert into the connecting cylinder on the front beam segment. The locking part and the mating part on the corresponding connecting rod and the connecting cylinder cooperate to limit the relative axial movement of the corresponding connecting rod and the connecting cylinder.

[0009] In one embodiment, the mating part includes at least one locking block, and a limiting hole is formed on the side wall of the docking cylinder corresponding to at least one locking block, and at least one locking block partially passes through the limiting hole;

[0010] The mating part is a mating groove formed on the side wall of the connecting rod;

[0011] The docking cylinder is equipped with a pulling member, which is used to drive at least one of the locking blocks to move toward the axis of the docking cylinder.

[0012] In one embodiment, at least one of the locking blocks includes two locking blocks, which are respectively located on opposite sides of the docking cylinder.

[0013] In one embodiment, the pulling member connects two of the locking blocks, and the docking rod has a through slot for the pulling member to pass through.

[0014] In one embodiment, the traction member includes a resilient telescopic rod.

[0015] In one embodiment, the locking block includes a limiting section away from the axis of the docking cylinder, and a limiting groove communicating with the limiting hole is provided on the outer side of the docking cylinder. The opening size of the limiting groove is larger than the opening size of the limiting hole. The limiting section is adapted to the limiting groove, and a portion of the limiting section is located within the limiting groove.

[0016] In one embodiment, a guide ring is provided on the base plate, and the docking rod portion is located inside the guide ring.

[0017] In one embodiment, a rotating ring is coaxially rotatably connected to the guide ring, the inner wall of the rotating ring is provided with an internal thread, the circumference of the docking rod is provided with an external thread, and the docking rod is threaded through the rotating ring.

[0018] In one embodiment, a slider is provided on the inner side of the guide ring, and a groove is provided on the outer side of the docking rod along its length direction, with the slider located in the groove.

[0019] In one embodiment, the beam segment further includes a top plate, an outer plate, and a middle web plate. The middle web plate connects the top plate and the bottom plate, the outer plate connects the top plate and the bottom plate, a first diagonal brace connects the middle web plate and the top plate, and a second diagonal brace connects the outer plate and the top plate.

[0020] The technical solution of this utility model, by setting up a connecting cylinder and a connecting rod, controls the connecting rod on the rear beam segment to move closer to the connecting cylinder on the front beam segment when adjacent beam segments are connected sequentially. The setting of the contraction section facilitates the insertion of the connecting rod into the connecting cylinder, which helps to ensure the connection between adjacent beam segments. After the connecting rod is inserted into the connecting cylinder, the alignment between adjacent beam segments is achieved. Finally, through the cooperation of the locking part and the mating part, the connecting rod on the rear beam segment and the connecting cylinder on the front beam segment are fixed, realizing the alignment and fixation between adjacent beam segments, which facilitates further welding of adjacent beam segments. Overall, it improves the problem of the inconvenience of connecting two beam segments. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 A structural schematic diagram of an embodiment of the layered steel box girder provided by this utility model;

[0023] Figure 2 for Figure 1 A partial cross-sectional view along the middle AA section;

[0024] Figure 3 for Figure 2 Enlarged view of section B;

[0025] Figure 4 for Figure 2 Enlarged view of section C;

[0026] Figure 5 for Figure 1 A partial cross-sectional view of the middle connecting rod.

[0027] Explanation of icon numbers:

[0028] 1. Base plate; 11. Guide ring; 111. Slider; 2. Connecting cylinder; 21. Limiting hole; 22. Limiting groove; 3. Connecting rod; 31. Contraction section; 32. Through groove; 33. Slide groove; 4. Locking assembly; 41. Locking part; 411. Limiting section; 412. Connecting section; 42. Mating part; 5. Pulling component; 6. Rotating ring; 7. Top plate; 8. Outer plate; 81. Second diagonal brace; 9. Middle web plate; 91. First diagonal brace.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] A common layered steel box girder consists of sequentially arranged beam segments. Each segment includes a top plate, a bottom plate, outer connecting plates, and a web plate. The top and bottom plates are parallel. There are two outer connecting plates; the upper side of one outer connecting plate connects to the lower side of the top plate, and the lower side of the other connects to the upper side of the bottom plate. The distance between the two outer connecting plates gradually decreases from top to bottom. The web plate connects the top and bottom plates and is located between the two outer connecting plates. There are two web plates, forming a channel between them. During the welding process, multiple beam segments need to be hoisted sequentially. Each segment needs to be assembled and connected with the previously hoisted segment. Furthermore, during the welding of two aligned segments, they are welded together, making the connection of beam segments relatively inconvenient.

[0034] This utility model proposes a layered steel box girder.

[0035] Please see Figure 1 , Figure 2 and Figure 3 In one embodiment of this utility model, the layered steel box girder includes multiple beam segments, each beam segment comprising:

[0036] Base plate 1;

[0037] A docking cylinder 2 and a docking rod 3 are located at opposite ends of the base plate 1 along its length. The docking cylinder 2 is fixedly connected to the base plate 1, and the docking rod 3 is movably mounted on the base plate 1 along its length. The extension directions of the docking cylinder 2 and the docking rod 3 are the same and both extend along the length of the base plate 1. The cross-section of the end of the docking rod 3 furthest from the docking cylinder 2 is reduced to form a contraction section 31.

[0038] The locking assembly 4 includes a locking part 41 and a mating part 42 that cooperate with each other. One of the locking part 41 and the mating part 42 is provided on the docking cylinder 2, and the other is provided on the docking rod 3.

[0039] In two adjacent beam segments, the connecting rod 3 on the rear beam segment is used to insert into the connecting cylinder 2 on the front beam segment. The locking part 41 and the mating part 42 provided on the corresponding mating connecting rod 3 and the mating cylinder 2 cooperate to limit the relative axial movement of the corresponding mating connecting rod 3 and the mating cylinder 2.

[0040] The technical solution of this utility model, by employing the connecting cylinder 2 and the connecting rod 3, controls the connecting rod 3 on the rear beam segment to move closer to the connecting cylinder 2 on the front beam segment when adjacent beam segments are connected sequentially. The constriction section 31 facilitates the insertion of the connecting rod 3 into the connecting cylinder 2, which helps ensure the connection between adjacent beam segments. After the connecting rod 3 is inserted into the connecting cylinder 2, the alignment between adjacent beam segments is achieved. Finally, through the cooperation of the locking part 41 and the mating part 42, the connecting rod 3 on the rear beam segment and the connecting cylinder 2 on the front beam segment are fixed, realizing the alignment and fixation between adjacent beam segments, which facilitates further welding of adjacent beam segments. Overall, this improves the problem of the inconvenience of connecting two beam segments.

[0041] The contraction section 31 can be a conical section.

[0042] Please see Figure 2 , Figure 3 and Figure 4 The mating part 42 includes at least one locking block, and a limiting hole 21 is provided on the side wall of the docking cylinder 2 corresponding to at least one locking block, and at least one locking block is partially inserted into the limiting hole 21;

[0043] The mating part 42 is a mating groove formed on the side wall of the connecting rod 3;

[0044] The docking cylinder is provided with a pulling member 5, which is used to drive at least one of the locking blocks to move toward the axis of the docking cylinder 2.

[0045] When the docking rod 3 is inserted into the docking cylinder 2, the outer periphery of the contraction section 31 abuts against the locking block. The contraction section 31 can drive the locking block away from the axis of the docking cylinder 2, and continue to control the docking rod 3 to be inserted into the docking cylinder 2. When the locking block is aligned with the mating groove, the locking block can be partially inserted into the mating groove under the action of the pulling member 5, which can lock the movement of the docking rod 3, and realize the locking and fixing between the docking rod 3 and the docking cylinder 2.

[0046] Please see Figure 2 , Figure 3 and Figure 4 At least one of the locking blocks includes two locking blocks, which are respectively located on opposite sides of the docking cylinder 2. The two locking blocks can engage and fix the docking rod 3 from opposite sides, improving the locking stability of the docking rod 3.

[0047] The pulling member 5 connects the two locking blocks, and the connecting rod 3 has a through groove 32 for the pulling member 5 to pass through. The through groove 32 reduces interference between the connecting rod 3 and the pulling member 5.

[0048] The pulling member 5 includes an elastic telescopic rod. The elastic telescopic rod has good elasticity and can drive the two pulling members 5 to move closer to each other, thereby allowing the pulling members 5 to slide within the limiting hole 21 and approach the axis of the docking cylinder 2.

[0049] Please see Figure 3 , Figure 4 and Figure 5 At least one locking block may also include multiple locking blocks, which may be arranged sequentially along the length of the docking cylinder 2. These multiple locking blocks further enhance the locking strength between the docking cylinder 2 and the docking rod 3. The multiple locking blocks may also be arranged sequentially around the axis of the docking cylinder 2. Each pulling member 5 corresponds to one of the locking blocks. The same end of each pulling member 5 is connected to the axis of the docking cylinder 2, and the other end is connected to the corresponding locking block. Each docking rod 3 is provided with a through groove 32 to avoid the pulling member 5.

[0050] The tensioning element 5 can also be a spring, which is common and has good elasticity. The outer diameter of the connecting rod 3 is consistent with the inner diameter of the connecting cylinder 2, which can ensure the structural strength of the assembly after the connecting rod 3 is inserted into the connecting cylinder 2.

[0051] In order to limit the stroke of the locking block as it enters the docking cylinder 2 under the action of the pulling member 5, the locking block includes a limiting section 411 away from the axis of the docking cylinder 2. A limiting groove 22 communicating with the limiting hole 21 is provided on the outer side of the docking cylinder 2. The opening size of the limiting groove 22 is larger than the opening size of the limiting hole 21. The limiting section 411 is adapted to the limiting groove 22, and part of the limiting section 411 is located within the limiting groove 22.

[0052] When the pulling member 5 pulls the locking block, the cross-sectional size of the limiting segment 411 is larger than the diameter of the limiting hole 21, and the locking block is close to the axis of the docking cylinder 2, the limiting segment 411 can abut against the bottom wall of the limiting groove 22, which can limit the movement of the locking block into the docking cylinder 2 and reduce the locking block from coming out of the limiting hole 21.

[0053] The card block also includes a connecting section 412, which is integrally connected to the limiting section 411. The connecting section 412 is located inside the limiting hole 21, and one end of the connecting section 412 away from the limiting section 411 is connected to the pulling member 5.

[0054] A guide ring 11 is provided on the base plate 1, and the docking rod 3 is partially located within the guide ring 11. The guide ring 11 can guide the sliding of the docking rod 3.

[0055] Please see Figure 5 A rotating ring 6 is coaxially rotatably connected to the guide ring 11. The inner wall of the rotating ring 6 is provided with an internal thread, and the circumference of the docking rod 3 is provided with an external thread. The docking rod 3 is threaded through the rotating ring 6. By controlling the relative rotation between the rotating ring 6 and the docking rod 3, the docking rod 3 can be driven to move along its length direction; by controlling the direction of the relative rotation between the rotating ring 6 and the docking rod 3, the direction of movement of the docking rod 3 can be controlled.

[0056] To reduce the rotation of the docking rod 3 and ensure alignment between the mating groove and the locking block, a slider 111 is provided on the inner side of the guide ring 11, and a groove 33 is formed on the outer side of the docking rod 3 along its length direction. The slider 111 is located within the groove 33. The slider 111 cooperates with the groove 33 to limit the rotation of the docking rod 3. When the rotating ring 6 is rotated, the rotation of the docking rod 3 is reduced, allowing the docking rod 3 to move along its length direction.

[0057] To facilitate the rotation of the docking rod 3, a motor can be installed on the base plate 1, a gear can be installed on the output shaft of the motor, and a mating tooth can be opened on the rotating ring 6 so that the mating tooth and the gear mesh together, and the docking rod 3 can be driven to move when the motor is started.

[0058] Please see Figure 1 The beam segment further includes a top plate 7, an outer connecting plate 8, and a middle web plate 9. The middle web plate 9 connects the top plate 7 and the bottom plate 1, and the outer connecting plate 8 connects the top plate 7 and the bottom plate 1. A first diagonal brace 91 connects the middle web plate 9 and the top plate 7, and a second diagonal brace 81 connects the outer connecting plate 8 and the top plate 7. Both the first diagonal brace 91 and the second diagonal brace 81 increase the support points for the top plate 7, improve the support effect for the top plate 7, and help ensure the stability of the top plate 7.

[0059] The first diagonal brace 91 and the second diagonal brace 81 are arranged in multiples along the length of the bottom plate 1, which can further enhance the support for the top plate 7.

[0060] Preferably, the two opposite sides of the middle web plate 9 are connected to a second diagonal brace 81, which makes the force on both sides of the middle web plate 9 more balanced and improves the stability of the middle web plate 9.

[0061] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A layered steel box girder, characterized by, It includes multiple beam segments, each of which includes: Base plate; A docking cylinder and a docking rod are located at opposite ends of the base plate along its length. The docking cylinder is fixedly connected to the base plate, and the docking rod is movably mounted on the base plate along its length. The extension direction of the docking cylinder is the same as that of the docking rod, and both extend along the length of the base plate. The cross-section of the end of the docking rod furthest from the docking cylinder is reduced to form a contraction section. The locking assembly includes a locking part and a mating part that cooperate with each other, wherein one of the locking part and the mating part is provided in the docking cylinder and the other is provided in the docking rod; In two adjacent beam segments, the connecting rod on the rear beam segment is used to insert into the connecting cylinder on the front beam segment. The locking part and the mating part on the corresponding connecting rod and the connecting cylinder cooperate to limit the relative axial movement of the corresponding connecting rod and the connecting cylinder.

2. The layered steel box beam according to claim 1, wherein The mating part includes at least one locking block, and a limiting hole is formed on the side wall of the docking cylinder corresponding to at least one locking block, and at least one locking block is partially inserted into the limiting hole; The mating part is a mating groove formed on the side wall of the connecting rod; The docking cylinder is equipped with a pulling member, which is used to drive at least one of the locking blocks to move toward the axis of the docking cylinder.

3. The layered steel box beam of claim 2, wherein, At least one of the card blocks includes two card blocks, which are respectively located on opposite sides of the docking cylinder.

4. The layered steel box beam of claim 3, wherein, The pulling member connects the two locking blocks, and the connecting rod has a through slot for the pulling member to pass through.

5. The layered steel box beam of claim 4, wherein, The traction component includes an elastic telescopic rod.

6. The layered steel box beam of claim 2, wherein The locking block includes a limiting section away from the axis of the docking cylinder. A limiting groove communicating with the limiting hole is provided on the outer side of the docking cylinder. The opening size of the limiting groove is larger than the opening size of the limiting hole. The limiting section is adapted to the limiting groove, and part of the limiting section is located in the limiting groove.

7. The layered steel box beam of claim 1, wherein A guide ring is provided on the base plate, and the docking rod is located inside the guide ring.

8. The layered steel box beam according to claim 7, wherein A rotating ring is coaxially rotatably connected to the guide ring. The inner wall of the rotating ring is provided with an internal thread, and the circumference of the docking rod is provided with an external thread. The docking rod is threaded through the rotating ring.

9. The layered steel box beam of claim 8, wherein, The guide ring has a slider on its inner side, and the docking rod has a groove along its length on its outer side, with the slider located in the groove.

10. The layered steel box beam of claim 1, wherein, The beam segment also includes a top plate, an outer plate, and a middle web plate. The middle web plate connects the top plate and the bottom plate, the outer plate connects the top plate and the bottom plate, a first diagonal brace connects the middle web plate and the top plate, and a second diagonal brace connects the outer plate and the top plate.

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