High-strength variable cross-section tooth bar for bridge main tower

Abstract

The utility model discloses a high strength variable cross section tooth bar for bridge main tower relates to tooth bar field, including upper tooth bar and lower tooth bar, upper tooth bar sets up the top of lower tooth bar, the diameter of upper tooth bar section is less than the diameter of lower tooth bar section, the outer wall of lower tooth bar is provided with the protective cover, the top wall of protective cover evenly is provided with fastening hole, and the present new scheme can be cooperated through setting up upper tooth bar, lower tooth bar and protective cover etc. Device can make the device convenient to the protection of the connecting place of lower tooth bar and main tower, avoids the rainwater or other corrosive liquid in the external environment to contact lower tooth bar and causes the corrosion of residual, is favorable to keeping the strength of variable cross section tooth bar, through setting up sealing washer, protective cover and lower tooth bar etc. Device can make the device convenient to improve the sealing property, and the top wall of sealing washer is inclined to avoid water stain and slide, avoids the corrosion of water stain and remains, is favorable to improving the practicality of device.

Description

Technical Field

[0001] This utility model belongs to the field of toothed bar technology, specifically a high-strength variable cross-section toothed bar for bridge main towers. Background Technology

[0002] As the core load-bearing structure of large bridges such as suspension bridges and cable-stayed bridges, the main tower of a bridge has extremely high requirements for the strength, stability, and durability of its connecting components. High-strength variable cross-section threaded rods are key components used for internal or external connections and anchoring of the main tower. They are mainly used to transfer loads and fix structural components (such as cable anchorages and steel reinforcement cages). Their performance directly affects the overall safety of the bridge. After installation, water can easily accumulate in the gaps at the connection points of the threaded rods, leading to corrosion. Over time, the root of the rod is easily corroded, reducing its supporting strength. Therefore, we propose the use of high-strength variable cross-section threaded rods for bridge main towers. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a high-strength variable cross-section toothed bar for bridge main towers, which effectively solves the problem that water can easily accumulate in the gaps at the joints of the toothed bar after installation, leading to rust. Over time, the root of the toothed bar is easily corroded, reducing its supporting strength.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-strength variable cross-section toothed bar for bridge main towers, comprising an upper toothed bar and a lower toothed bar, wherein the upper toothed bar is disposed at the top of the lower toothed bar, the diameter of the cross-section of the upper toothed bar is smaller than the diameter of the cross-section of the lower toothed bar, a protective cover is provided on the outer wall of the lower toothed bar, fastening holes are uniformly opened on the top wall of the protective cover, a storage box is provided on the inner wall of the protective cover, a drain port is uniformly opened on the top wall of the storage box, the inner wall of the storage box matches the outer wall of the lower toothed bar, a pushing ring is provided on the inner wall of the storage box, a pushing rod is uniformly arranged on the bottom wall of the pushing ring, a spring is provided on the top wall of the pushing ring, and the top end of the spring is disposed on the top wall of the inner cavity of the storage box.

[0005] Preferably, the top wall of the protective cover has an annular groove, the inner wall of the annular groove is provided with a sealing ring, and the top wall of the sealing ring is inclined.

[0006] Preferably, the top wall of the lower toothed bar is arc-shaped, and the upper toothed bar and the lower toothed bar are integrally formed.

[0007] Preferably, the outer wall of the protective cover is provided with a rotating ring, which is hexagonal in shape.

[0008] Preferably, the upper and lower toothed bars are made of 40Cr tempered steel, and the outer walls of both the upper and lower toothed bars are provided with an anti-corrosion layer.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] 1. The main tower of this bridge uses high-strength variable cross-section toothed bars. By setting up upper toothed bars, lower toothed bars and protective covers, the device can easily protect the connection between the lower toothed bar and the main tower, avoiding the contact of rainwater or other corrosive liquids in the external environment with the lower toothed bar and causing corrosion, which helps to maintain the strength of the variable cross-section toothed bars.

[0011] 2. The main tower of the bridge uses high-strength variable cross-section toothed bars. By setting sealing rings, protective covers and lower toothed bars, the device can be made to improve the sealing performance. The top wall of the sealing ring is set at an inclination to prevent water stains from sliding off and to prevent water stains from remaining and causing corrosion, which is conducive to improving the practicality of the device.

[0012] 3. The main tower of the bridge uses high-strength variable cross-section toothed bars. By setting up a rotating ring, protective cover and lower toothed bar and other devices, the device can easily drive the protective cover to rotate. The rotating ring is hexagonal, which makes it easy to turn with a wrench or other tools, which helps to improve the installation efficiency of the protective cover. Attached Figure Description

[0013] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0014] In the attached diagram:

[0015] Figure 1 This is a schematic diagram of the high-strength variable cross-section toothed bar structure for the main tower of a bridge according to this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the protective cover of this utility model;

[0017] Figure 3 This utility model Figure 2 Enlarged view of part A in the image;

[0018] In the diagram: 100, upper toothed bar; 101, lower toothed bar; 102, protective cover; 103, storage box; 104, push ring; 105, push rod; 106, spring; 107, sealing ring; 108, swivel ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] Depend on Figure 1 , Figure 2 and Figure 3 The present invention discloses a high-strength variable cross-section toothed bar for a bridge main tower. An upper toothed bar 100 is fixedly connected to the top of a lower toothed bar 101. The diameter of the upper toothed bar 100 is smaller than the diameter of the lower toothed bar 101. A protective cover 102 is screwed onto the outer wall of the lower toothed bar 101 to protect the variable cross-section toothed bar. Fastening holes are evenly distributed on the top wall of the protective cover 102. A storage box 103 is fixedly connected to the inner wall of the protective cover 102 to store sealing and anti-corrosion oil. Drainage ports are evenly distributed on the top wall of the storage box 103. The inner wall of the storage box 103 matches the outer wall of the lower toothed bar 101. A push ring is slidably connected to the inner wall of the storage box 103. 104. The push ring 104 facilitates the pushing of sealing and anti-corrosion oil. The bottom wall of the push ring 104 is uniformly and fixedly connected with push rods 105. The push rods 105 facilitate the movement of the push ring 104. The top wall of the push ring 104 is fixedly connected with a spring 106. The spring 106 facilitates the pushing of the push ring 104 and prevents the push ring 104 from shifting, which could lead to leakage of the sealing and anti-corrosion oil. The top of the spring 106 is fixedly connected to the top wall of the inner cavity of the storage box 103.

[0021] In this embodiment: The lower toothed rod 101 anchoring section is vertically hoisted into the reserved channel at the bottom of the main tower using a tower crane or hand chain hoist. Align it with the positioning mark, and temporarily fix the variable cross-section toothed rod with a bracket or positioning steel plate to ensure that the verticality deviation is ≤1 / 1000 of the toothed rod length and the center position deviation is ≤5mm. High-strength non-shrink grouting material such as C40 grade is used to fill the gap between the variable cross-section toothed rod and the channel. Grouting is performed from bottom to top to ensure compaction. After grouting, it is cured until the strength reaches the design requirements. The embedment depth of the anchoring section must meet the design requirements to ensure pull-out resistance. The protective cover 102 is screwed onto the outer wall of the lower toothed bar 101. The protective cover 102 moves on the lower toothed bar 101, causing the storage box 103 to move. The storage box 103 then moves the pushing rod 105, which is pushed by the bottom of the main tower. The pushing rod 105 then pushes the pushing ring 104, which in turn pushes the sealing oil in the storage box 103, making it more secure. The sealing oil is discharged from the drain port, so that the sealant fills the cavity between the storage box 103 and the protective cover 102, which facilitates the sealing of the gaps. After the protective cover 102 is moved to the bottom of the main tower, it is installed at the bottom of the main tower by fastening bolts through the fastening holes, which facilitates the limiting and fixing of the protective cover 102. This allows the device to easily protect the connection between the lower toothed bar 101 and the main tower, preventing rainwater or other corrosive liquids in the external environment from contacting the lower toothed bar 101 and causing corrosion, which is beneficial to maintaining the strength of the variable cross-section toothed bar.

[0022] The top wall of the protective cover 102 is provided with an annular groove, and a sealing ring 107 is fixedly connected to the inner wall of the annular groove. The sealing ring 107 facilitates the sealing of the outer wall of the variable cross-section toothed strip. The top wall of the sealing ring 107 is inclined.

[0023] In this embodiment, the sealing ring 107 is made of rubber. The deformation of the sealing ring 107 facilitates screwing it to the outer wall of the lower toothed bar 101, which improves the sealing performance. The top wall of the sealing ring 107 is inclined to prevent water stains from sliding off and to prevent water stains from remaining and causing corrosion, which helps to improve the practicality of the device.

[0024] The top wall of the lower toothed bar 101 is arc-shaped, and the upper toothed bar 100 and the lower toothed bar 101 are integrally formed.

[0025] In this embodiment, the top wall of the lower toothed bar 101 is arc-shaped, which makes the transition of the variable cross-section smooth, avoids stress concentration, and helps to improve the strength of the variable cross-section toothed bar. The integral molding eliminates the hidden dangers of stress concentration, poor welding, and missing welding at the connection, and the overall structure is more robust.

[0026] A rotating ring 108 is fixedly connected to the outer wall of the protective cover 102. The rotating ring 108 facilitates the rotation of the protective cover 102. The rotating ring 108 is hexagonal.

[0027] In this embodiment, the rotating ring 108 is set to facilitate the rotation of the protective cover 102. The rotating ring 108 is hexagonal, which makes it easy to turn with a wrench or other tools, thus improving the installation efficiency of the protective cover 102.

[0028] The upper toothed bar 100 and the lower toothed bar 101 are made of 40Cr quenched and tempered steel, and the outer walls of the upper toothed bar 100 and the lower toothed bar 101 are coated with an anti-corrosion layer.

[0029] In this embodiment, the upper toothed bar 100 and lower toothed bar 101, made of 40Cr quenched and tempered steel, have a yield strength ≥450MPa, which is high and easy to support and install. The anti-corrosion layer facilitates the anti-corrosion treatment of the upper toothed bar 100 and lower toothed bar 101, which helps to improve the service life of the upper toothed bar 100 and lower toothed bar 101.

Claims

1. A high-strength variable cross-section dental strip for bridge main towers, comprising an upper dental strip (100) and a lower dental strip (101), characterized in that: The upper toothed bar (100) is disposed at the top of the lower toothed bar (101). The diameter of the cross section of the upper toothed bar (100) is smaller than the diameter of the cross section of the lower toothed bar (101). The outer wall of the lower toothed bar (101) is provided with a protective cover (102). The top wall of the protective cover (102) is uniformly provided with fastening holes. The inner wall of the protective cover (102) is provided with a storage box (103). The top wall of the storage box (103) is uniformly provided with a drain port. The inner wall of the storage box (103) matches the outer wall of the lower toothed bar (101). The inner wall of the storage box (103) is provided with a push ring (104). The bottom wall of the push ring (104) is uniformly provided with push rods (105). The top wall of the push ring (104) is provided with a spring (106). The top end of the spring (106) is disposed on the top wall of the inner cavity of the storage box (103).

2. The high-strength variable cross-section toothed bar for bridge main towers according to claim 1, characterized in that: The top wall of the protective cover (102) is provided with an annular groove, and the inner wall of the annular groove is provided with a sealing ring (107), and the top wall of the sealing ring (107) is inclined.

3. The high-strength variable cross-section toothed bar for bridge main towers according to claim 1, characterized in that: The top wall of the lower toothed bar (101) is arc-shaped, and the upper toothed bar (100) and the lower toothed bar (101) are integrally formed.

4. The high-strength variable cross-section toothed bar for bridge main towers according to claim 1, characterized in that: The outer wall of the protective cover (102) is provided with a rotating ring (108), which is hexagonal in shape.

5. The high-strength variable cross-section toothed bar for bridge main towers according to claim 1, characterized in that: The upper toothed bar (100) and the lower toothed bar (101) are made of 40Cr quenched and tempered steel, and the outer walls of the upper toothed bar (100) and the lower toothed bar (101) are provided with anti-corrosion layers.

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