A reusable prestressed anchor

Abstract

This application relates to the field of construction equipment technology and provides a reusable prestressed anchor. The anchor comprises two anchoring bodies, each detachably connected to both ends of a steel strand. Within each anchoring body, the outer base and connecting seat are both barrel-shaped structures with open tops. The lower end of the connecting seat is detachably connected to the barrel opening of the outer base, and a tie-up body slides within the barrel opening of the connecting seat. The base, connecting seat, and tie-up body each have axially penetrating through-holes, and the tie-up body also has a tightening hole communicating with its through-hole. The end of the steel strand passes sequentially through the through-holes of the outer base, connecting seat, and tie-up body, and is then tightened by a tightening pin threaded into the tightening hole. Thus, through the detachable connection between the anchoring body itself and the steel strand, the anchor can be reused, effectively solving the problem of non-reusability in existing anchors and expanding the applicability of anchors while saving on usage costs.

Description

Technical Field

[0001] This application relates to the field of construction equipment technology, and in particular to a reusable prestressed anchor. Background Technology

[0002] Anchorages are permanent fixing devices in post-tensioning methods, used to transfer the tensile force of prestressing tendons to the concrete structure. They bond with the prestressing tendons and concrete through permanent deformation (such as wedge interlocking and conical anchoring). Anchorage components (such as anchor plates and wedges) may develop microcracks or plastic deformation after the initial tensioning. Repeated use leads to degradation of mechanical properties, increased friction at the anchor joint, and loss of effective prestress, significantly reducing load-bearing capacity and posing safety hazards. Therefore, they are generally not reusable. For example, wedge-type anchors and pier head anchors become part of the structure once installed and need to bear loads for a long time.

[0003] Prestressed anchors are widely used in construction, transportation, water conservancy, energy and other fields, especially in high-rise buildings, bridges, tunnels and high-speed railways. With accelerated infrastructure investment, the application potential of prestressed anchors is gradually being released, and demand is becoming increasingly strong. However, the non-reusability of existing anchors greatly limits their development. Summary of the Invention

[0004] The purpose of this application is to provide a reusable prestressed anchor to solve or alleviate the problems existing in the prior art.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] This application provides a reusable prestressed anchor, comprising: an anchoring body and a steel strand. There are two anchoring bodies, each detachably connected to both ends of the steel strand. Each anchoring body includes: an outer base, a connecting seat, a tie body, and a tightening pin. The outer base and connecting seat are both barrel-shaped structures with open tops, and the lower end of the connecting seat is detachably connected to the barrel-shaped structure of the outer base. The tie body is slidably fitted into the barrel-shaped opening of the connecting seat. The outer base, connecting seat, and tie body are each provided with an axially penetrating through-hole, and the tie body is also provided with a tightening hole communicating with its through-hole.

[0007] The ends of the steel strand pass through the threading holes of the outer base, connecting seat, and tie body in sequence, and are pressed by the tightening pin connected by the internal thread of the tightening hole.

[0008] Preferably, the inner wall of the barrel structure of the outer base is threadedly connected to the outer wall of the connecting seat, and the upper end face of the connecting seat is provided with a tightening slot for detachable assembly of the connecting seat relative to the outer base.

[0009] Preferably, the outer base is also provided with a fine-tuning component, which is engaged with the outer base by a worm gear or helical gear, and the rotation of the fine-tuning component can drive the outer base to move axially.

[0010] Preferably, a fine-tuning mounting hole is provided on the side wall of the barrel structure of the outer base, and a fine-tuning component is installed in the fine-tuning mounting hole through a bearing, and the rotating shaft of the fine-tuning component extends out of the end face of the open end of the barrel structure of the outer base.

[0011] Preferably, the fine-tuning component includes a helical gear shaft or a worm shaft, and the end face of the helical gear shaft or worm shaft extending out of the barrel structure of the outer base is detachably connected to a fine-tuning knob.

[0012] Preferably, the outer bottom surface of the barrel structure of the outer base is also provided with multiple positioning posts.

[0013] Preferably, the outer wall of the barrel structure of the outer base is provided with a mounting groove along the circumference, and a rubber friction pad can be detachably installed in the mounting groove.

[0014] Preferably, the cross-section of the mounting groove is dovetail-shaped.

[0015] Preferably, the space between the connector and the tie body is filled with lubricating oil so that the tie body can rotate circumferentially relative to the connector.

[0016] Beneficial effects:

[0017] The reusable prestressed anchorage provided in this application embodiment comprises two anchoring bodies, each detachably connected to both ends of a steel strand, allowing the steel strand to be pulled in via the two anchoring bodies. Within each anchoring body, the outer base and connecting seat are both barrel-shaped structures with open tops. The lower end of the connecting seat is detachably connected to the barrel opening of the outer base, and a tie-up body slides within the barrel opening of the connecting seat. The outer base, connecting seat, and tie-up body are each provided with axially penetrating through-holes. Simultaneously, the tie-up body is also provided with a tightening hole communicating with its through-hole. Furthermore, after the end of the steel strand passes sequentially through the through-holes of the outer base, connecting seat, and tie-up body, it is pressed into place by a tightening pin threaded into the tightening hole, achieving a secure and reliable connection between the anchoring body and the steel strand. Therefore, through the detachable connection between the anchoring body itself and the steel strand, the prestressed anchorage can be reused, effectively solving the problem of the non-reusability of existing anchorages, expanding the applicability of anchorages while effectively saving on usage costs. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein:

[0019] Figure 1 This is a structural schematic diagram of an anchoring body provided according to some embodiments of this application;

[0020] Figure 2 for Figure 1 A sectional view of the anchoring body shown;

[0021] Figure 3 This is a schematic diagram of the structure of the outer base provided according to some embodiments of this application;

[0022] Figure 4 This is a schematic diagram of the structure of a connector provided according to some embodiments of this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100. Outer base; 200. Connecting seat; 300. Tie body; 400. Top pin; 500. Fine-tuning component; 600. Rubber friction pad; 700. Fine-tuning knob;

[0025] 101. Positioning pin; 102. Mounting groove; 103. Fine-tuning mounting hole; 201. Tighten the locking jaws. Detailed Implementation

[0026] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will understand that modifications and variations can be made to the present application without departing from the scope or spirit of the present application. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention should fall within the scope of protection of the embodiments of the present invention.

[0027] Conventional prestressed anchorages are non-reusable, designed for permanent anchoring. Only certain recyclable anchorages (such as unlocking anchorages for foundation pit support) allow for the recovery of the main reinforcement bars via an unlocking device, enabling limited reuse under strict control. Therefore, this application provides a reusable prestressed anchorage, such as... Figures 1 to 4 As shown, the prestressed anchorage includes an anchoring body and steel strands. There are two anchoring bodies, each detachably connected to both ends of the steel strand. By adjusting the two anchoring bodies at both ends of the steel strand, different tensions can be applied to the steel strand, allowing it to be used in prestressed applications of varying degrees. It should be noted that in this embodiment, when using the prestressed anchorage, the anchoring bodies must be fixed to fixed components in the application environment (such as walls, steel supports, formwork, etc.) to secure the anchoring bodies.

[0028] In this embodiment, the anchoring body includes: an outer base 100, a connecting seat 200, a tie body 300, and a tightening pin 400. Both the outer base 100 and the connecting seat 200 are barrel-shaped structures with open tops, and the lower end of the connecting seat 200 is detachably connected to the barrel-shaped structure of the outer base 100. The inner wall of the barrel-shaped structure of the outer base 100 is threadedly connected to the outer wall of the connecting seat 200, and the upper surface of the connecting seat 200 is provided with a tightening slot 201 for detachable assembly of the connecting seat 200 relative to the outer base 100. That is, the inner wall of the barrel-shaped structure of the outer base 100 has internal threads, and the outer wall of the barrel-shaped structure of the connecting seat 200 has external threads. A tightening slot 201 is provided radially downward at the open end of the barrel-shaped structure of the connecting seat 200 so that a tightening tool can be inserted into the tightening slot 201 to thread-tighten the connecting seat 200 to the outer base 100.

[0029] The tie body 300 is a cylindrical structure that slides axially within the barrel structure of the connecting seat 200. A tightening threaded hole (i.e., a tightening hole) is radially provided in the center of the tie body 300, and a tightening pin 400 is threaded into the tightening threaded hole. Here, the outer base 100, connecting seat 200, and tie body 300 all have coaxial prestressing threaded holes along the axial direction, and the tightening threaded hole of the tie body 300 extends to the prestressing threaded hole, i.e., the tightening hole connects to the threaded hole. The end of the hot-dip galvanized steel strand passes sequentially through the prestressing threaded holes on the outer base 100, connecting seat 200, and tie body 300 from the lower part of the outer base 100. Then, the steel strand is pressed by the tightening pin 400 threaded into the tightening hole, i.e., tightening the tightening pin 400 in the tightening threaded hole, so that the end of the tightening pin 400 presses against the hot-dip galvanized steel strand in the prestressing threaded hole. Meanwhile, lubricating oil is filled between the connecting seat 200 and the tie body 300 so that the tie body 300 can rotate circumferentially relative to the connecting seat 200. In this way, when the steel strand is subjected to torsion, the tie body 300 rotates together with the steel strand, effectively dissipating the torsional force on the steel strand and preventing the steel strand from twisting and tangling.

[0030] After the anchoring bodies at both ends are fixed on the fixing components, the prestressed steel strands are tightened. Under the action of the steel strands, the tie body 300 is pressed against the inner ground of the barrel structure of the connecting seat 200. Then, by tightening the buckle and rotating the connecting seat 200, the relative position between the connecting seat 200 and the outer base 100 is adjusted, thereby adjusting the tension of the prestressed steel strands. Here, the anchoring bodies are fixed by fixing the outer base 100 on the fixing components. Specifically, the outer bottom surface of the barrel structure of the outer base 100 is also provided with multiple positioning posts 101. The positioning posts 101 are used to connect with the fixing components of the building to achieve positioning and fixing of the outer base 100.

[0031] In a specific application scenario, the anchor body is installed on the concrete casting mold of the building structure. The casting mold includes an inner substrate and an outer substrate. Both the inner and outer substrates have tie grooves that are adapted to and aligned with the outer base 100. These tie grooves together form the tie mounting groove of the outer base 100. After the end of the top-tightening pin 400 presses the hot-dip galvanized steel strand in the prestressed wire hole, the anchor body is placed into the tie mounting groove. After the anchor body is placed into the tie mounting groove, the hot-dip galvanized steel strand is tensioned by adjusting the connecting seat 200, causing the steel strand to bear prestress. Multiple steel strands are woven together to form a prestressed braided layer, achieving prestressed tension on the casting mold.

[0032] In this embodiment, a mounting groove 102 is provided circumferentially on the outer side wall of the barrel structure of the outer base 100. The cross-section of the mounting groove is dovetail-shaped, and a rubber friction pad 600 is detachably installed in the mounting groove 102. Therefore, after the outer base 100 is installed on the fixed components of the building, the rubber friction pad 600 on the outer side wall can further increase the friction between the outer base 100 and the fixed components of the building, effectively preventing possible displacement of the outer base 100. Here, multiple mounting grooves 102 can be arranged side-by-side circumferentially on the outer side wall of the outer base 100, with each mounting groove 102 corresponding to a rubber friction pad 600, to increase the frictional contact area between the outer base 100 and the fixed components of the building.

[0033] In this embodiment, a fine-tuning component 500 is also provided on the outer base 100. The fine-tuning component 500 is engaged with the outer base 100 by a worm gear or helical gear, and the rotation of the fine-tuning component 500 can drive the outer base 100 to move axially. That is, after the external thread connecting the inner and outer bases 100 is opened on the outer side wall of the barrel structure of the connecting seat 200, helical teeth that engage with the gear or teeth that engage with the worm gear are provided on the external thread along the circumference of the connecting seat 200. By rotating the fine-tuning component 500, the connecting seat 200 moves circumferentially within the barrel structure of the outer base 100. In this way, the connecting seat 200 is quickly connected to the outer base 100 through the tightening buckle 201 at the end of the connecting seat 200, and the prestress of the steel strand is adjusted to the approximate range. Then, by rotating the fine-tuning component 500, the connecting seat 200 is moved slightly within the barrel structure of the outer base 100 to fine-tune the prestress of the steel strand, thereby achieving precise adjustment of the prestress of the steel strand.

[0034] In a specific example, a fine-tuning mounting hole 103 is provided on the side wall of the barrel structure of the outer base 100. A fine-tuning component 500 is mounted in the fine-tuning mounting hole 103 via a bearing, and the rotating shaft of the fine-tuning component 500 extends out of the end face of the open end of the barrel structure of the outer base 100. By installing a fine-tuning knob 700 on the part of the rotating shaft of the fine-tuning component 500 that extends out of the open end of the barrel structure of the outer base 100, the rotating shaft can be rotated by rotating the fine-tuning knob 700, thereby adjusting the position of the connecting seat 200 relative to the outer base 100.

[0035] In a specific application scenario, the fine-tuning component 500 includes a helical gear shaft or a worm gear shaft, and a fine-tuning knob 700 is detachably connected to the end face of the open end of the barrel structure extending from the outer base 100. That is, the rotating shaft and meshing gear (gear meshing or worm gear meshing) of the fine-tuning component 500 are integrally formed and mounted in the fine-tuning mounting cavity 103 via bearings. The detachable fine-tuning knob 700 is mounted on the end face of the helical gear shaft or worm gear shaft extending from the barrel structure of the outer base 100. Furthermore, the fine-tuning knob 700 can be configured with an irregular cross-section (e.g., a polygonal structure), allowing for fine-tuning rotation via a connecting adjustment wrench.

[0036] In this embodiment, the prestressed anchor can be reused by the anchor body itself and the detachable connection between it and the steel strand, which effectively solves the problem of the non-reusability of existing anchors and effectively saves on usage costs while expanding the scope of application of anchors.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A reusable prestressed anchor, characterized in that, include: The anchoring body and the steel strand are provided. There are two anchoring bodies, which can be detachably connected to both ends of the steel strand. The anchoring body includes: an outer base, a connecting seat, a tie body, and a tightening pin; the outer base and the connecting seat are both barrel structures with open tops, and the lower end of the connecting seat is detachably connected to the barrel structure of the outer base, and the tie body is slidably fitted into the barrel opening of the connecting seat; wherein, the outer base, the connecting seat, and the tie body are respectively provided with axial through holes, and the tie body is also provided with a tightening hole communicating with its through holes; The ends of the steel strand pass through the threading holes of the outer base, connecting seat, and tie body in sequence, and are pressed by the tightening pin connected by the internal thread of the tightening hole.

2. The reusable prestressed anchorage according to claim 1, characterized in that, The inner wall of the barrel structure of the outer base is threadedly connected to the outer wall of the connecting seat, and the upper end face of the connecting seat is provided with a tightening slot for detachable assembly of the connecting seat relative to the outer base.

3. The reusable prestressed anchorage according to claim 2, characterized in that, The outer base is also equipped with a fine-tuning component. The fine-tuning component is engaged with the outer base by a worm gear or helical gear, and the rotation of the fine-tuning component can drive the outer base to move axially.

4. The reusable prestressed anchorage according to claim 3, characterized in that, The barrel structure of the outer base has a fine-tuning mounting hole on its side wall. A fine-tuning component is installed in the fine-tuning mounting hole through a bearing, and the rotating shaft of the fine-tuning component extends out of the end face of the opening end of the barrel structure of the outer base.

5. The reusable prestressed anchorage according to claim 3, characterized in that, The fine-tuning component includes a helical gear shaft or a worm shaft, and the end face of the open end of the barrel structure extending from the outer base of the helical gear shaft or worm shaft is detachably connected to a fine-tuning knob.

6. The reusable prestressed anchorage according to claim 1, characterized in that, The outer bottom surface of the barrel structure of the outer base is also provided with multiple positioning posts.

7. The reusable prestressed anchorage according to claim 1, characterized in that, The outer wall of the barrel structure of the outer base is provided with a mounting groove along the circumference, and a rubber friction pad can be detachably installed in the mounting groove.

8. The reusable prestressed anchorage according to claim 7, characterized in that, The cross-section of the mounting groove is dovetail-shaped.

9. The reusable prestressed anchorage according to claim 1, characterized in that, The space between the connector and the tie body is filled with lubricating oil so that the tie body can rotate circumferentially relative to the connector.

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