Assembly type external prestressing steel strand anchor head protection device

Abstract

The utility model discloses a split mounting type external prestressing steel strand anchor head protection device which comprises a protection cover, an anchoring plate and a steel beam. The protective cover is fixedly arranged on one side of the anchoring plate, and one end of the steel beam penetrates through the anchoring plate and is embedded in the protective cover; the protective cover comprises a shell, a fixed cover and a base, the fixed cover and the base are detachably assembled on the two sides of the shell, and a working window is formed in the side, connected with the fixed cover, of the shell. The anchor head part of the steel beam is effectively protected by the protective cover, and the safety and the stability of the prestressed structure are improved; the protective cover comprises a shell, a fixed cover and a base, the fixed cover and the base are detachably assembled on the two sides of the shell, and construction and daily maintenance work are facilitated; the working window on the shell can be used for conveniently observing the corrosion condition of the steel beam after the fixed cover is detached, and the protective cover does not need to be completely detached, so that the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of bridge reinforcement processing, in particular to an assembled external prestressed steel strand anchor head protection device. Background Art

[0002] External prestressing reinforcement technology for bridges is an active reinforcement technology. It applies prestress to the tensile zone of the bridge structure through prestressed materials, eliminates the adverse internal forces generated by some loads, and provides the bearing capacity of the structure. External prestressing has become one of the most effective reinforcement technologies in bridge reinforcement and has good and broad application prospects. However, the external cables are arranged outside the bridge section, and corrosion prevention and protection are relatively difficult, which greatly affects the durability of the external cables and leads to failure of external prestressing. Among them, the corrosion prevention of the anchor head is very critical.

[0003] At present, most external prestressed cable anchor heads have not taken effective protection measures. Some adopt the method of filling the external protective cover of the anchor head with anti-corrosion grease or paraffin to protect the anchor head, but the grease is easy to age and decompose, and it is easy to leak. In the "anchor sealing structure" disclosed in the publication number CN101487231A, it includes an anchor plate, a protective cover, a sealing gasket, anti-corrosion grease, a clip, a sealing plate and a sealant, so that the anchor is sealed and protected as a whole. However, the above device still has the following problems: the amount of grease squeezed in is difficult to control, and the corrosion of the external cable anchor head cannot be observed in the later stage after the anchor is sealed. Summary of the invention

[0004] In order to overcome the defects in the above-mentioned prior art, an assembled external prestressed steel strand anchor head protection device is provided, which is convenient for observing the corrosion of the external cable anchor head and is easy to assemble and disassemble.

[0005] The technical solution of the utility model is as follows: an assembled external prestressed steel strand anchor head protection device, comprising a protective cover, an anchor plate and a steel bundle; the protective cover is fixed on one side of the anchor plate, and one end of the steel bundle passes through the anchor plate and is embedded in the protective cover; the protective cover comprises an outer shell, a fixed cover and a base, the fixed cover and the base are detachably assembled on both sides of the outer shell, and a working window is provided on the side where the outer shell is connected to the fixed cover.

[0006] Preferably, an inner flap is provided at the connection between the working window and the outer shell, a plurality of first bolts are equidistantly arranged circumferentially on the inner flap, and a first bolt hole matching the plurality of first bolts is provided on the fixing cover.

[0007] Preferably, the length of the outer shell is equal to the length of the steel bundle embedded in the protective cover.

[0008] Preferably, one side of the shell is provided with an outer flap for connecting with the base.

[0009] Preferably, the size of the base matches the size of the outer flap.

[0010] Preferably, a plurality of second bolts are equidistantly arranged circumferentially on the base, and second bolt holes corresponding to the plurality of second bolts are opened on the outer flap.

[0011] Preferably, the anchor plate is fixed to the base by welding.

[0012] Preferably, a through hole for the steel bundle to pass through is provided at the center of the base.

[0013] Preferably, the outer shell, the outer flap and the inner flap are an integrally formed structure.

[0014] Preferably, the anchor plate is provided with fixing holes for the steel bundle to pass through.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] In an assembled external prestressed steel strand anchor head protection device, a protective cover effectively protects the anchor head part of the steel bundle, improving the safety and stability of the prestressed structure; the protective cover includes an outer shell, a fixed cover and a base, and the fixed cover and the base can be detachably assembled on both sides of the outer shell, which is convenient for construction and daily maintenance work; the working window on the outer shell can be used to conveniently observe the rust condition of the steel bundle after removing the fixed cover, without completely removing the protective cover, thereby improving work efficiency.

[0017] Furthermore, the inner flap enhances the structural strength of the connection, making the entire device more stable and durable; the multiple first bolts equidistantly arranged on the inner flap make the connection more uniform and firm. The equidistant arrangement can effectively disperse the force and avoid stress concentration at certain points, thereby improving the bearing capacity and stability of the entire device. The fixed cover is provided with first bolt holes that match the multiple first bolts, which makes the connection between the inner flap and the fixed cover simple and reliable.

[0018] Furthermore, the length of the outer shell is equal to the length of the steel bundle embedded in the protective cover, ensuring that the protective cover can completely cover and protect the anchor head portion of the steel bundle, avoiding gaps or looseness caused by length mismatch, and improving the protective effect of the protective cover.

[0019] Furthermore, the outer flap serves as a connecting component between the outer shell and the base, providing a firm connection point, so that the entire device can better disperse stress when subjected to external force, thereby improving fatigue resistance and impact resistance.

[0020] Furthermore, the base and the outer flap are matched in size, ensuring a close fit between the two, avoiding gaps caused by size mismatch, and enhancing the overall stability of the device; the installation process is simpler and more efficient, and the staff can quickly match the outer flap with the base and fix it.

[0021] Furthermore, by means of a plurality of second bolts and corresponding second bolt holes which are equidistantly arranged circumferentially, a uniform and firm connection can be formed between the base and the outer flap; the second bolts and the bolt holes are arranged correspondingly, making the installation process more convenient.

[0022] Furthermore, welding fixation, as a permanent connection method, can ensure that the connection between the anchor plate and the base has extremely high strength, and the welded connection points are not easy to loosen or fall off, effectively avoiding structural safety hazards caused by connection failure.

[0023] Furthermore, the through hole enables the steel bundle to pass through the base smoothly, thereby connecting with components such as the anchor plate; thus simplifying the installation process, improving the accuracy of the steel bundle positioning, and enhancing the structural stability and sealing performance of the device.

[0024] Furthermore, the one-piece structure significantly improves the overall strength and stability of the device, has good sealing and waterproof performance, and makes disassembly more efficient and convenient when disassembling the outer shell, fixed cover and base.

[0025] Furthermore, the fixing holes enable the steel bundle to accurately pass through the anchor plate and form a firm connection with the anchor plate; this ensures that the steel bundle can maintain a stable position and state during the prestressing process, preventing it from slipping or shifting, thereby ensuring the accuracy and effectiveness of prestressing transmission.

[0026] Other features and advantages of the present invention will be disclosed in detail in the following specific implementations and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described below in conjunction with the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the installation of an assembled external prestressed steel strand anchor head protection device of the utility model;

[0029] Figure 2 It is a schematic diagram of the structure of the protective cover of the utility model;

[0030] Figure 3 This is a schematic diagram of the elevation structure of the protective cover of the utility model;

[0031] Figure 4 It is a side structural perspective view of the protective cover of the utility model;

[0032] The following are the descriptions of the reference numerals:

[0033] Protective cover 1, anchor plate 2, steel bundle 3, outer shell 1-1, fixed cover 1-2, base 1-3, working window 1-1-1, inner flap 1-1-2, first bolt 1-1-2-1, first bolt hole 1-2-1, outer flap 1-1-3, second bolt 1-3-1, second bolt hole 1-1-3-1, through hole 1-3-2. DETAILED DESCRIPTION

[0034] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0035] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0036] like Figures 1 to 4 As shown, an assembled external prestressed steel strand anchor head protection device comprises a protection cover 1, an anchor plate 2 and a steel bundle 3; the protection cover 1 is fixedly arranged on one side of the anchor plate 2, one end of the steel bundle 3 passes through the anchor plate 2 and is embedded in the protection cover 1, and the anchor plate 2 is provided with a fixing hole for the steel bundle 3 to pass through, and the fixing hole enables the steel bundle to maintain a stable position and state during the prestressing process to prevent it from slipping or deflecting, thereby ensuring the accuracy and effectiveness of the prestressing transmission; wherein, the protection cover 1 is as shown in FIG. Figure 1 The shape shown is a cuboid, but it can be made into a cylinder, a polygonal column or other shapes according to actual needs, and has strong applicability.

[0037] The protective cover 1 includes an outer shell 1-1, a fixed cover 1-2 and a base 1-3. The fixed cover 1-2 and the base 1-3 are detachably assembled on both sides of the outer shell 1-1. A working window 1-1-1 is provided on one side where the outer shell 1-1 is connected to the fixed cover 1-2. The window size of the working window 1-1-1 is not less than the cross-section of the steel bundle 3. The working window 1-1-1 is convenient for the staff to confirm whether the protective material is leaking or failing and to observe the anchor head defects.

[0038] Among them, an inner flap 1-1-2 is provided at the connection between the working window 1-1-1 and the outer shell 1-1, and a plurality of first bolts 1-1-2-1 are equidistantly arranged on the inner flap 1-1-2 in the circumferential direction, and a first bolt hole 1-2-1 matching the plurality of first bolts 1-1-2-1 is provided on the fixing cover 1-2. The first bolt 1-1-2-1 passes through the first bolt hole 1-2-1 and is fixed by a nut matching the first bolt 1-1-2-1, so that the fixing cover 1-2 and the outer shell 1-1 are detachably connected, which is convenient for the staff to disassemble and install, and improves the work efficiency.

[0039] Furthermore, one side of the housing 1-1 is provided with an outer flap 1-1-3 for connecting with the base 1-3, and a plurality of second bolts 1-3-1 are arranged equidistantly on the base 1-3 in the circumferential direction, and a second bolt hole 1-1-3-1 corresponding to the plurality of second bolts 1-3-1 is opened on the outer flap 1-1-3. The outer flap 1-1-3 and the base 1-3 are connected by the second bolt 1-3-1 and the second bolt hole 1-1-3-1, and the second bolt 1-3-1 passes through the second bolt hole 1-1-3-1 and is fixed by a nut matching the second bolt 1-3-1; the size of the base 1-3 matches the size of the outer flap 1-1-3, which improves the stability of the entire device, and the same size improves the installation accuracy and simplifies the installation process, thereby improving work efficiency.

[0040] Furthermore, a through hole 1-3-2 for the steel bundle 3 to pass through is provided at the center of the base 1-3, so that the steel bundle 3 can pass through the base 1-3 smoothly, thereby being connected with components such as the anchor plate 2. This simplifies the installation process and improves the accuracy of positioning the steel bundle 3, ensuring that the prestress can be accurately applied to the structure.

[0041] Among them, the outer shell 1-1, the outer flap 1-1-3 and the inner flap 1-1-2 are an integrally formed structure, and the length of the outer shell 1-1 is equal to the length of the steel bundle 3 embedded in the protective cover 1. The integrally formed structure improves the overall strength and stability of the device and simplifies the manufacturing process of the device; and the outer shell 1-1 is equal in length to the steel bundle 3 embedded in the protective cover 1, so that the outer shell 1-1 can fit tightly on the steel bundle 3, avoiding gaps or looseness caused by length mismatch.

[0042] Construction steps:

[0043] S1, determining the size of the protective cover 1 according to the reserved length of the anchor plate 2 and the steel bundle 3 embedded in the protective cover 1, and manufacturing the outer shell 1-1;

[0044] S2, first weld the base 1-3 to the anchor plate 2;

[0045] S3, then, the housing 1-1 is sleeved outside the steel bundle 3, one side of the housing 1-1 is connected to the base 1-3, and the matching second bolt hole 1-1-3-1 is connected to the second bolt 1-3-1, and fixed with a nut, but not tightened;

[0046] S4, filling the protective cover 1 with anti-corrosion material through the working window 1-1-1 opened in the shell 1-1, and the anti-corrosion material is filled from the deep by using a thin catheter, and the anti-corrosion material is continued to be filled outward after the anti-corrosion material overflows around the connection of the base 1-3;

[0047] S5. After the anti-corrosion material is filled, first clean the anti-corrosion material overflowing around the connection of the base 1-3, then tighten the nut at the second bolt 1-3-1, and then clean the material overflowing from the working window 1-1-1 on one side of the shell 1-1, cover the fixing cover 1-2, and fix it with the matching first bolt 1-1-2-1 and the first bolt hole 1-2-1. The first bolt 1-1-2-1 passes through the first bolt hole 1-2-1 and is tightened by the nut.

[0048] S6, during maintenance, the nut at the first bolt 1-1-2-1 can be unscrewed, and the fixing cover 1-2 can be removed to observe the properties of the anti-corrosion material. The anti-corrosion material can be replenished at any time through the working window 1-1-1 opened in the housing 1-1 or cleaned and applied by hand;

[0049] S7, when the steel bundle 3 needs to be tensioned again, the nut at the second bolt 1-3-1 can be unscrewed and the protective cover 1 can be removed. After the tensioning is completed, the protective cover 1 can be reinstalled according to the above steps.

[0050] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. An assembled external prestressed steel strand anchor head protection device, characterized in that: The invention comprises a protective cover (1), an anchor plate (2) and a steel bundle (3); the protective cover (1) is fixedly arranged on one side of the anchor plate (2), and one end of the steel bundle (3) passes through the anchor plate (2) and is embedded in the protective cover (1); the protective cover (1) comprises an outer shell (1-1), a fixed cover (1-2) and a base (1-3); the fixed cover (1-2) and the base (1-3) are detachably assembled on both sides of the outer shell (1-1), and a working window (1-1-1) is provided on one side of the outer shell (1-1) where the fixed cover (1-2) is connected.

2. The assembled external prestressed steel strand anchor head protection device according to claim 1 is characterized in that: An inner flip plate (1-1-2) is provided at the connection between the working window (1-1-1) and the outer shell (1-1), a plurality of first bolts (1-1-2-1) are equidistantly arranged circumferentially on the inner flip plate (1-1-2), and a first bolt hole (1-2-1) matching the plurality of first bolts (1-1-2-1) is provided on the fixing cover (1-2).

3. The assembled external prestressed steel strand anchor head protection device according to claim 1 is characterized in that: The length of the outer shell (1-1) is equal to the length of the steel bundle (3) embedded in the protective cover (1).

4. The assembled external prestressed steel strand anchor head protection device according to claim 1 is characterized in that: An outer flap (1-1-3) for connecting to the base (1-3) is provided on one side of the housing (1-1).

5. The assembled external prestressed steel strand anchor head protection device according to claim 1 is characterized by: The size of the base (1-3) matches the size of the outer flap (1-1-3).

6. The assembled external prestressed steel strand anchor head protection device according to claim 1 is characterized by: A plurality of second bolts (1-3-1) are equidistantly arranged in the circumferential direction on the base (1-3), and second bolt holes (1-1-3-1) corresponding to the plurality of second bolts (1-3-1) are opened on the outer flap (1-1-3).

7. The assembled external prestressed steel strand anchor head protection device according to claim 1 is characterized by: The anchor plate (2) is fixed to the base (1-3) by welding.

8. The assembled external prestressed steel strand anchor head protection device according to claim 1 is characterized by: A through hole (1-3-2) for the steel bundle (3) to pass through is provided at the center of the base (1-3).

9. The assembled external prestressed steel strand anchor head protection device according to claim 1 is characterized by: The outer shell (1-1), the outer flap (1-1-3) and the inner flap (1-1-2) are an integrally formed structure.

10. The assembled external prestressed steel strand anchor head protection device according to claim 1, characterized in that: The anchor plate (2) is provided with a fixing hole for the steel bundle (3) to pass through.

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