Steel-concrete combined beam bridge deck slab prestress tensioning device
By designing a quick connection structure between the tension jack and the limit plate in the bridge deck prestress tensioning equipment, the gap problem during the equipment is solved, ensuring that the steel strand is fully tensioned, and the efficiency of prestress tensioning is improved and convenience.
Patent Information
- Application Number
- CN202421013886.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-11
AI Technical Summary
During the tensioning process of existing bridge deck prestress tensioning equipment, the tensioning jack and the limiting plate are prone to gaps, resulting in the steel strand cannot be fully tensioned, affecting the prestress tensioning effect.
A restriction plate is designed including a tension jack and a limiting plate fixed to the anchor. Through the connecting ring, insertion plate and threaded fitting cylinder, the rapid connection and positioning of the tension jack and the limiting plate are achieved to avoid gaps. produce.
The rapid connection between the tension jack and the limiting plate is achieved, ensuring the complete tension of the steel stranded wire, improving the efficiency and convenience of prestressed tensioning, and avoiding the hidden danger of the steel stranded wire being unable to be fully tensioned due to gaps.
Smart Images
Figure CN222251785U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge steel strand tensioning, in particular to a prestressed tensioning device for a steel-concrete combined beam bridge deck. Background Art
[0002] Steel-concrete composite beam is a new type of structure developed on the basis of steel structure and concrete structure. It mainly sets shear connectors (studs, channel steel, bending bars, etc.) between steel beam and concrete flange plate to resist the lifting and relative sliding of the two at the interface, so that they can work together as a whole. The prestressing of the bridge deck of steel-concrete composite beam is an important link in the bridge construction process. The main purpose is to improve the bearing capacity and durability of the bridge through prestressing technology. The basic principle of prestressing technology is to apply a compressive prestress in the tensile area of the concrete structural member to offset the tensile stress generated by the external load. This can significantly enhance the bearing capacity and crack resistance of the bridge deck.
[0003] The tensioning equipment is the equipment used to apply prestress. The prestress-related values are generated by the tensioning of the equipment. The prestressing tensioning equipment mainly consists of a jack used for tensioning and an electric oil pump used for tensioning. The strength of the steel strands or high-strength steel bars in the anchor is increased to give the prestress value. When the tensioning equipment is tensioning the high-strength steel bars on the box girder, the tensioning jack is in working condition, and it is easy for the limit plate installed on the anchor to have a gap, which cannot be kept close, and it is easy to cause the steel strand to fail to be fully tensioned.
[0004] Therefore, it is necessary to provide a new prestressed tensioning device for steel-concrete composite beam bridge deck to solve the above technical problems. Utility Model Content
[0005] In order to solve the above technical problems, the utility model provides a prestressing tensioning device for a steel-concrete combined beam bridge deck.
[0006] The prestressed tensioning device for a steel-concrete composite beam bridge deck provided by the utility model comprises:
[0007] Tension jacks, and
[0008] A limit plate fixed on the anchor and used to limit the displacement of the anchor clip;
[0009] A connecting ring for docking the limit plate is installed on the connecting port of the tensioning jack, and a plurality of plug-in plates distributed in an annular manner and rotatably connected are installed in the connecting ring;
[0010] The limiting plate is provided with a plurality of axially arranged and annularly distributed insertion grooves, and the insertion grooves are connected to the arc-shaped cavity provided on the limiting plate, the other side of the cavity opening of the arc-shaped cavity is connected to the limiting groove provided on the limiting plate, and the limiting grooves are arranged in parallel with the insertion grooves;
[0011] The limiting plate is also provided with a threaded abutting cylinder for abutting against the insertion plate.
[0012] Preferably, the insertion groove, the arc-shaped cavity and the limiting groove form a U-shaped structure, and the insertion groove is opened from the connecting end surface of the limiting plate and the connecting ring to the connecting end surface of the limiting plate and the anchor.
[0013] Preferably, a threaded section for connecting to a threaded abutment cylinder is provided on the outer wall of the limiting plate below the arc-shaped cavity.
[0014] Preferably, the threaded abutment cylinder is sleeved on the limiting plate and is threadably connected to the set threaded segment.
[0015] Preferably, a rotating ring for rotational connection is installed on the connecting end surface of the connecting ring, and a plurality of annularly distributed plug-in plates are fixedly embedded in the rotating ring.
[0016] Preferably, a wire passage cavity is provided on the limiting plate.
[0017] Preferably, the connecting end surface of the connecting ring is provided with an expansion cavity for inserting a limiting plate and a wire passing cavity for passing the steel strand.
[0018] Compared with the related art, the prestressed tensioning device for the steel-concrete composite beam bridge deck provided by the utility model has the following beneficial effects:
[0019] The utility model can quickly complete the fast connection and positioning of the tensioning jack and the beam of the limit plate, making its installation faster and more convenient, and can also avoid the hidden danger that a gap is generated between the tensioning jack and the limit plate during operation, thereby causing the steel strand to fail to be fully tensioned. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A structural schematic diagram of a preferred embodiment of the prestressing tensioning device for a steel-concrete composite beam bridge deck provided by the utility model;
[0021] Figure 2 for Figure 1 The schematic diagram of the connecting ring structure on the tensioning jack is shown;
[0022] Figure 3 for Figure 1 Schematic diagram of the structure of the limiting plate shown.
[0023] Numbers in the figure: 1, tensioning jack; 2, limit plate; 2a, wire cavity; 2b, insertion groove; 2c, arc cavity; 2d, limit groove; 21, threaded section; 22, threaded abutment cylinder; 3, connecting ring; 3a, expansion cavity; 31, insertion plate; 32, rotating ring. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0025] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.
[0026] See also Figures 1 to 3 The embodiment of the utility model provides a prestressed tensioning device for a steel-concrete composite beam bridge deck, and the prestressed tensioning device for a steel-concrete composite beam bridge deck includes: a tensioning jack 1, and a limit plate 2 fixed on the anchor and used to limit the displacement of the anchor clip.
[0027] In the embodiments of the present invention, please refer to Figure 1 , Figure 2 and Figure 3 The connection port of the tensioning jack 1 is provided with a connection ring 3 for docking the limit plate 2, and a plurality of annularly distributed and rotatably connected plug-in plates 31 are installed in the connection ring 3. Specifically, a rotatably connected rotating ring 32 is installed on the connection end surface of the connection ring 3, and the plurality of annularly distributed plug-in plates 31 are fixedly embedded on the rotating ring 32, and the connection end surface of the connection ring 3 is provided with an expansion cavity 3a for plugging the limit plate 2 and a wire-passing cavity for passing the steel strand;
[0028] The limiting plate 2 is provided with a wire-passing cavity 2a, and the limiting plate 2 is provided with a plurality of axially arranged and annularly distributed insertion grooves 2b, and the insertion grooves 2b are communicated with the arc cavity 2c provided on the limiting plate 2, and the other side of the cavity mouth of the arc cavity 2c is communicated with the limiting groove 2d provided on the limiting plate 2, and the limiting groove 2d is arranged parallel to the insertion groove 2b, and the insertion groove 2b, the arc cavity 2c and the limiting groove 2d form a U-shaped structure, and the insertion groove 2b is provided from the connecting end surface of the limiting plate 2 and the connecting ring 3 to the connecting end surface of the limiting plate 2 and the anchor, and the limiting plate 2 is also provided with a threaded abutting cylinder 22 for abutting the insertion plate 31, specifically, a threaded section 21 for connecting the threaded abutting cylinder 22 is provided on the outer ring wall of the limiting plate 2 located below the arc cavity 2c, and the threaded abutting cylinder 22 is sleeved on the limiting plate 2 and threadedly connected to the set threaded section 21.
[0029] It should be noted that after the limit plate 2 is fixedly installed on the anchor, the steel strand is passed through the limit plate 2, the connecting ring 3 at the end of the tensioning jack 1 and the tensioning jack 1, and the insertion plate 31 in the connecting ring 3 is respectively corresponding to each insertion groove 2b on the limit plate 2, and then it is inserted into the insertion groove 2b to the bottom of the insertion groove 2b, and then the rotating ring 32 is rotated to make the insertion plate 31 rotate along the arc cavity 2c to the bottom of the limit groove 2d, and then the threaded abutment tube 22 on the limit plate 2 is rotated so that the threaded abutment tube 22 is screwed in the direction of the connecting ring 3 along the threaded section 21, so that the threaded abutment tube 22 abuts against the insertion plate 31 and slides along the top groove wall of the limit groove 2d until it is locked, thereby completing the rapid connection and positioning of the tensioning jack 1 and the limit plate 2 beam, making its installation faster and more convenient, and at the same time it can also avoid the hidden danger of a gap between the tensioning jack 1 and the limit plate 2 during operation, thereby causing the steel strand to fail to be fully tensioned.
[0030] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A prestressing tensioning device for a steel-concrete composite beam bridge deck, characterized in that: include: Tension jack (1), and A limit plate (2) fixed to the anchor and used to limit the displacement of the anchor clip; A connecting ring (3) for docking with the limit plate (2) is installed on the connecting port of the tensioning jack (1), and a plurality of plug-in plates (31) distributed in an annular manner and rotatably connected are installed in the connecting ring (3); The limiting plate (2) is provided with a plurality of axially arranged and annularly distributed insertion grooves (2b), and the insertion grooves (2b) are connected to the arc-shaped cavity (2c) provided on the limiting plate (2), the other side of the cavity opening of the arc-shaped cavity (2c) is connected to the limiting groove (2d) provided on the limiting plate (2), and the limiting groove (2d) is arranged in parallel with the insertion groove (2b); The limiting plate (2) is also provided with a threaded abutment cylinder (22) for abutting against the insertion plate (31).
2. The prestressed tensioning device for steel-concrete composite beam bridge deck according to claim 1 is characterized in that: The insertion groove (2b), the arc-shaped cavity (2c) and the limiting groove (2d) form a U-shaped structure, and the insertion groove (2b) is opened from the connection end surface of the limiting plate (2) and the connecting ring (3) to the connection end surface of the limiting plate (2) and the anchor.
3. The prestressing tensioning device for steel-concrete composite beam bridge deck according to claim 2 is characterized in that: A threaded section (21) for connecting to a threaded abutment cylinder (22) is provided on the outer wall of the limiting plate (2) located below the arc-shaped cavity (2c).
4. The prestressing tensioning device for steel-concrete composite beam bridge deck according to claim 3 is characterized in that: The threaded abutment cylinder (22) is sleeved on the limiting plate (2) and is threadedly connected to the provided threaded section (21).
5. The prestressed tensioning device for steel-concrete composite beam bridge deck according to claim 1 is characterized in that: A rotatably connected rotating ring (32) is mounted on the connecting end surface of the connecting ring (3), and a plurality of annularly distributed inserting plates (31) are fixedly engaged with the rotating ring (32).
6. The prestressed tensioning device for steel-concrete composite beam bridge deck according to claim 1 is characterized in that: The limiting plate (2) is provided with a wire passage cavity (2a).
7. The prestressed tensioning device for steel-concrete composite beam bridge deck according to claim 1 is characterized in that: The connecting end surface of the connecting ring (3) is provided with an expansion cavity (3a) for inserting the limiting plate (2) and a wire passage cavity for passing the steel strand.