Prestress embedded anchor box device
By designing a pre-embedded anchor box device with a simple structure, it uses plastic material to form one-piece, and gradually expand the outer wall and limit the steel strand wire in the inner wall, it solves the problem of concrete entry caused by the large gap between the anchor box and the anchor pad plate, improves the tensioning effect and positioning accuracy of the steel strand wire, and reduces production costs and construction time.
Patent Information
- Application Number
- CN202510693965.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-27
- Publication Date
- 2025-08-08
AI Technical Summary
In the existing prestressing project, the gap between the anchor box and the anchor pad plate is large, causing the concrete to enter the steel strand, affecting the tensioning effect, and the construction time is long.
A prestressed pre-embedded anchor box device with a simple structure is designed, which is formed by a plastic material, including a closed outer wall and flange. The outer wall gradually increases, and the inner wall limits the steel strand wire. When connected, the flange covers the side of the anchor pad plate to prevent concrete from entering. The inner wall penetrates the steel strand wire through the through grooves, and there are reinforcement ribs between the outer wall and the inner wall to improve positioning accuracy.
It improves the tensioning effect and positioning accuracy of the steel strands, reduces construction time, reduces production costs, and improves work efficiency and sealing quality.
Smart Images
Figure CN120443798A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of prestressed materials, in particular to a prestressed embedded anchor box device. Background Art
[0002] Prestressed concrete structures are preloaded before they are subjected to loads. This creates compressive stress within the tensile zone of the concrete when subjected to external loads. This offsets or reduces the tensile stress generated by the external loads, increasing the rigidity of the components and preventing or delaying the appearance of cracks during normal use. Therefore, prestressed structures are widely used in prestressed monolithic flooring. Prestressed monolithic flooring can be extended without seams, reducing cracking and significantly lowering maintenance costs. It is widely used in industrial plants, logistics warehouses, supermarkets, and precision manufacturing workshops.
[0003] In prestressed engineering, the anchor box is a key auxiliary accessory. When pouring concrete, it is necessary to reserve grooves or recessed holes for the later tensioning of prestressed steel strands, so as to facilitate anchor sealing after the tensioning is completed. The anchor box is used to connect with the anchor. It is first connected to the formwork before pouring the concrete. After the pouring is completed and the concrete has a certain degree of solidification, the anchor box is removed to form a groove or recessed hole that can be used for tensioning the steel strands. At present, extruded boards or foam boards are usually used for cutting at the construction site. This method consumes a lot of working time, and the gap between the anchor box and the anchor pad is large, which can easily cause concrete to enter the steel strands, thereby affecting the tensioning effect of the steel strands. Summary of the Invention
[0004] The object of the present invention is to provide an anchor box with a simple structure and the ability to improve the prestressed tensioning effect. This prestressed embedded anchor box device includes an anchor box body, the anchor box body includes a bottom wall and a closed outer wall extending from the periphery of the bottom wall toward a first direction; the outer wall has a flange extending from the periphery of the bottom wall toward a second direction opposite to the first direction, and the flange is higher than the plane where the bottom wall is located; the outer wall includes a first side wall and a second side wall arranged opposite to each other, and the distance between the first side wall and the second side wall gradually increases from the bottom wall toward the first direction; the bottom wall is provided with a through groove for the steel strand to pass through, and the through groove runs through the anchor box body.
[0005] Furthermore, the outer wall also includes a third side wall and a fourth side wall arranged opposite to each other, and the third side wall and the fourth side wall are adjacent to the first side wall and the second side wall respectively, so that the first side wall, the second side wall, the third side wall and the fourth side wall enclose each other to form a closed outer wall.
[0006] Furthermore, the distance between the third side wall and the fourth side wall gradually increases from the bottom wall toward the first direction.
[0007] Furthermore, at least one of the first side wall, the second side wall, the third side wall and the fourth side wall has an extension line, and the extension line has an oblique angle with an axis perpendicular to the plane where the bottom wall is located, and the angle range of the oblique angle is 3~10°.
[0008] Furthermore, there is a height difference between the flange and the plane where the bottom wall is located, and the height difference ranges from 0.5 to 3 cm.
[0009] Furthermore, a convex edge extends from the periphery of the outer wall at one end away from the bottom wall in a direction parallel to the plane where the bottom wall is located, and the convex edge protrudes outward relative to the outer wall.
[0010] Furthermore, the bottom wall is provided with two through holes, and the through holes are provided at diagonal positions of the bottom wall.
[0011] Furthermore, the anchor box body includes an inner wall, the inner wall extends from the bottom wall toward the first direction, and the inner side of the inner wall penetrates to form the through groove.
[0012] Furthermore, a plurality of reinforcing ribs are connected between the outer wall and the inner wall.
[0013] Furthermore, the anchor box body is integrally formed of plastic material.
[0014] The prestressed embedded anchor box device of the present invention has the following advantages over the prior art: 1. The anchor box device of the present invention has a simple structure and low production cost, which can greatly improve work efficiency. Compared with the existing technology, the present invention is made of plastic material and is integrally molded, which has low production cost. The anchor box device can be directly connected to the anchor pad for use at the construction site, which greatly saves workers' operation time and improves work efficiency.
[0015] 2. The anchor box body of the present invention includes a bottom wall and a closed outer wall extending from the periphery of the bottom wall in a first direction. The closed outer wall prevents concrete from entering the anchor box body. Furthermore, the outer wall includes a flange extending from the periphery of the bottom wall in a second direction opposite to the first direction. When the bottom wall of the anchor box body is connected to the anchor pad, the flange covers the side of the anchor pad, preventing concrete from entering through the gap between the anchor pad and the bottom wall, thereby improving the tensioning effect of the steel strands.
[0016] 3. The distance between the first side wall and the second side wall of the outer wall of the anchor box body of the present invention, as well as the distance between the third side wall and the fourth side wall, gradually increases from the bottom wall toward the first direction, so that the outer wall forms a box-like structure with a gradually increasing opening. This structure can make it more convenient and quick to dismantle the anchor box in the later stage, reduce the falling of cement blocks, make the grooves or recessed holes used for steel strand tensioning smoother, improve the tensioning effect, and also improve the sealing quality of the prestressed pipe.
[0017] 4. The anchor box body of the present invention includes an inner wall, which extends from the bottom wall toward the first direction. The inner side of the inner wall is penetrated to form a through groove, which runs through the anchor box body. The steel strand passes through the through groove. The inner wall limits the position of the steel strand, which can effectively improve the positioning accuracy of the anchor steel strand, thereby further improving the tensioning effect of the steel strand. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a structural schematic diagram of a prestressed embedded anchor box device of the present invention; Figure 2 This is a structural schematic diagram of a prestressed embedded anchor box device of the present invention (from another angle); Figure 3 This is a cross-sectional view of a prestressed embedded anchor box device connected to an anchor pad according to the present invention; Figure 4 for Figure 2 Cross-sectional view of section AA. DETAILED DESCRIPTION
[0019] The present invention will be described in further detail below with reference to the accompanying drawings.
[0020] Refer to the attached Figures 1 to 4 The prestressed embedded anchor box device of the present invention comprises an anchor box body 10, which comprises a bottom wall 1 and a closed outer wall 2 extending from the periphery of the bottom wall 1 in a first direction D1. The bottom wall 1 is provided with a through slot 4 for the steel strand to pass through, and the through slot 4 passes through the anchor box body 10. Figure 3 When the anchor box body 10 is connected to the anchor plate 20, the bottom wall 1 abuts against the front end 21 of the anchor plate 20, allowing the steel strands (not shown) in the anchor plate 20 to pass through the through slots 4 and out of the anchor box body 10. In this embodiment, two through holes 6 are provided in the bottom wall 1. The through holes 6 extend through the anchor box body 10. Fasteners, such as bolts, are passed through the through holes 6 to connect the anchor box body 10 to the anchor plate 20. The through holes 6 are located near the edge of the bottom wall 1 and at diagonal positions on the bottom wall, avoiding the grouting port 22 of the anchor plate, thereby facilitating connection.
[0021] The outer wall 2 has a flange 3 extending from the periphery of the bottom wall 1 in a second direction D2 opposite to the first direction D1. The flange 3 is raised above the plane of the bottom wall 1. The flange 3 has a height difference from the plane of the bottom wall 1, and the height difference ranges from 0.5 to 3 cm. In this embodiment, the flange 3 is integrally formed with the outer wall 2 and can be considered a part of the outer wall 2. In this embodiment, the height difference is 1.5 cm. When the bottom wall 1 of the anchor box body 10 is connected to the anchor plate 20, the flange 3 can cover the side of the anchor plate 20, preventing concrete from entering the gap between the anchor plate 20 and the anchor box body 10, thereby preventing concrete from affecting the steel strands and improving the tensioning effect of the steel strands. In the present invention, the first direction D1 and the second direction D2 are merely used to assist in illustrating the general extension directions of the various components of the anchor box body 10. The first direction D1 and the second direction D2 are generally perpendicular to the plane of the bottom wall 1.
[0022] In this embodiment, the outer wall 2 includes a first side wall 21, a second side wall 22, and a third side wall 23 and a fourth side wall 24 that are oppositely disposed. The third side wall 23 and the fourth side wall 24 are adjacent to the first side wall 21 and the second side wall 22, respectively, so that the first side wall 21, the second side wall 22, the third side wall 23, and the fourth side wall 24 enclose and form a closed outer wall 2. In this embodiment, the first side wall 21, the second side wall 22, the third side wall 23, and the fourth side wall 24 are all planar structures, and the places where adjacent side walls are connected are rounded transitions. In other embodiments, the outer wall 2 can also be a circular or elliptical structure including a first side wall 21 and a second side wall 22 having curved surfaces and oppositely disposed, or can be a structure of other shapes, and is not limited to the structure of this embodiment.
[0023] In this embodiment, the distance between the first side wall 21 and the second side wall 22 gradually increases from the bottom wall 1 toward the first direction D1, and the distance between the third side wall 23 and the fourth side wall 24 gradually increases from the bottom wall 1 toward the first direction D1, forming a structure with a gradually increasing opening on the outer wall 2. This structure allows for easier and faster removal of the anchor box later, reduces the loss of cement blocks, and makes the grooves or recesses used for steel strand tensioning smoother, improving the tensioning effect and the sealing quality of the prestressed pipe. In this embodiment, at least one of the first side wall 21, the second side wall 22, the third side wall 23, and the fourth side wall 24 has an extension line L1. The extension line L1 forms an oblique angle a with an axis L2 perpendicular to the plane of the bottom wall, and the angle ranges from 3 to 10 degrees. In this embodiment, the first side wall 21, the second side wall 22, the third side wall 23, and the fourth side wall 24 all have an oblique angle a, which in this embodiment is 5 degrees.
[0024] In this embodiment, a flange 5 extends from the periphery of the outer wall 2 at one end distal from the bottom wall 1 in a direction parallel to the plane of the bottom wall 1. The flange 5 projects outward relative to the outer wall 2. When the anchor box body 10 is connected to the anchor pad 20 and secured to the formwork, the flange 5 abuts against the outside of the formwork. During concrete pouring, this prevents concrete from entering the gap between the formwork and the anchor box body 10, preventing concrete from affecting the steel strands and further improving the tensioning effect of the steel strands.
[0025] In this embodiment, the anchor box body 10 includes an inner wall 7 extending from the bottom wall 1 in a first direction D1. The inner side of the inner wall 7 is formed through the through slot 4, through which the steel strand passes. The inner wall 7 limits the position of the steel strand, effectively improving the positioning accuracy of the anchor strand, thereby further enhancing the tensioning effect of the steel strand. A plurality of reinforcing ribs 8 are connected between the outer wall 2 and the inner wall 7. The reinforcing ribs 8 are crisscrossed and connected between the outer wall 2 and the inner wall 7. The reinforcing ribs 7 enhance the overall strength of the anchor box body and prevent concrete from crushing the outer wall 2. The inner wall 7, reinforcing ribs 8, and flange 5 are flush at the end away from the bottom wall 1, forming the distal end 11 of the anchor box body 10. The distal end 11 of the anchor box body is parallel to the plane of the bottom wall 1.
[0026] In this embodiment, the anchor box body 10 is integrally formed of plastic material, and the outer surface of the outer wall 2 of the anchor box body 10 is coated with a layer of lubricant to facilitate the later removal of the anchor box body and prevent the concrete from falling off and being damaged.
[0027] To use the anchor box assembly, the bottom wall 1 is placed against the front end 21 of the anchor pad 20. A fastener, such as a bolt, is inserted from the distal end 11 of the anchor box assembly through the through-hole 6 to connect the anchor box assembly 10 to the anchor pad 20. The steel strand (not shown) within the anchor pad 20 can be passed through the through-slot 4 and out of the anchor box assembly 10. The flange 3 covers the side of the anchor pad 20 to prevent concrete from entering through the gap between the anchor pad and the bottom wall. After installation, concrete can be poured, covering the outer wall 2. Once the concrete has solidified to a certain degree, the anchor box assembly can be removed. The fastener, such as a bolt, is removed from the distal end 11 of the anchor box assembly. A force is applied to remove the anchor box assembly 10 from the semi-solidified concrete. A groove or recessed hole is then formed at the anchor box assembly 10, which can be used to connect a tensioning mechanism to tension the steel strand.
[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0029] 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 the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.
[0030] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.
[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0032] In the description of this specification, reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.
[0033] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A prestressed embedded anchor box device, characterized in that: The anchor box body includes an anchor box body, which includes a bottom wall and a closed outer wall extending from the periphery of the bottom wall toward a first direction; the outer wall has a flange extending from the periphery of the bottom wall toward a second direction opposite to the first direction, and the flange is higher than the plane where the bottom wall is located; the outer wall includes a first side wall and a second side wall arranged opposite to each other, and the distance between the first side wall and the second side wall gradually increases from the bottom wall toward the first direction; the bottom wall is provided with a through groove for the steel strand to pass through, and the through groove runs through the anchor box body.
2. A prestressed embedded anchor box device according to claim 1, characterized in that: The outer wall further includes a third side wall and a fourth side wall arranged opposite to each other, wherein the third side wall and the fourth side wall are adjacent to the first side wall and the second side wall respectively, so that the first side wall, the second side wall, the third side wall and the fourth side wall enclose each other to form a closed outer wall.
3. A prestressed embedded anchor box device according to claim 2, characterized in that: The distance between the third side wall and the fourth side wall gradually increases from the bottom wall toward the first direction.
4. A prestressed embedded anchor box device according to claim 3, characterized in that: At least one of the first side wall, the second side wall, the third side wall and the fourth side wall has an extension line, and the extension line has an oblique angle with an axis perpendicular to the plane where the bottom wall is located, and the angle range of the oblique angle is 3-10 degrees.
5. The prestressed embedded anchor box device according to claim 1, characterized in that: There is a height difference between the flange and the plane where the bottom wall is located, and the height difference ranges from 0.5 to 3 cm.
6. The prestressed embedded anchor box device according to claim 1, characterized in that: A convex edge extends from the periphery of the outer wall at one end away from the bottom wall in a direction parallel to the plane where the bottom wall is located, and the convex edge protrudes outward relative to the outer wall.
7. The prestressed embedded anchor box device according to claim 1, characterized in that: The bottom wall is provided with two through holes, and the through holes are arranged at diagonal positions of the bottom wall.
8. The prestressed embedded anchor box device according to claim 1, characterized in that: The anchor box body includes an inner wall extending from the bottom wall toward the first direction, and the inner side of the inner wall is penetrated to form the through groove.
9. The prestressed embedded anchor box device according to claim 8, characterized in that: A plurality of reinforcing ribs are connected between the outer wall and the inner wall.
10. A prestressed embedded anchor box device according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9, characterized in that: The anchor box body is integrally formed of plastic material.