Prestressing tensioning equipment for prestressed steel strands

Abstract

This invention relates to the field of steel strand tensioning technology, and in particular to prestressed tensioning equipment for prestressed steel strands. The anchoring assembly in the tensioning equipment includes anchor plate one, anchor plate two, and clamping plates. Several anchor plates one are arranged horizontally on the upper and lower sides of a single steel strand, and several anchor plates two are arranged vertically on the left and right sides of a single steel strand. Both anchor plates one and two have grooves for nesting between them. Anchor plates one and two are perpendicularly staggered to form at least one cell. Clamping plates are movably embedded in the cell. The inner wall of the cell is an inclined surface. Each clamping plate includes an upper fixing plate and a lower fixing plate. The upper and lower fixing plates have vertically extending plates on the side away from the cell. This invention uses detachable anchor plates one and two alternately to form the anchorage. Compared to traditional one-piece anchorages, one-piece assembled anchor plates support installation from the side of the steel strand, making installation more convenient and flexible.

Description

Technical Field

[0001] This invention relates to the field of steel strand tensioning technology, and in particular to prestressing tensioning equipment for prestressed steel strands. Background Technology

[0002] In engineering fields such as bridges and water conservancy, to enhance the crack resistance, stiffness, and load-bearing capacity of concrete structures, it is necessary to install steel strands inside and tension them to increase internal prestress. However, traditional tensioning equipment mostly uses one-piece anchorages, which requires passing steel strands with different angles through the anchorage and jacks one by one during installation, making the placement of the tensioning equipment difficult. Furthermore, the one-piece anchorage combined with the ring-shaped jack for tensioning is prone to uneven stress, affecting the overall tensioning effect. Therefore, a prestressing tensioning device for prestressed steel strands is needed. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a prestressing tensioning device for prestressed steel strands, which has the advantages of convenient disassembly, uniform tensioning, and high safety.

[0004] To achieve the above objectives, the technical solution of the present invention is: a prestressing tensioning device for prestressed steel strands, used for prestressing tensioning of steel strands. The tensioning device includes an anchor plate, an anchoring assembly, and a lifting assembly. The anchor plate is embedded in the concrete surface. The anchoring assembly includes anchor plate one, anchor plate two, and a clamping plate. A plurality of anchor plates one are horizontally arranged on the upper and lower sides of a single steel strand, and a plurality of anchor plates two are vertically arranged on the left and right sides of a single steel strand. Both anchor plates one and anchor plates two have grooves for nesting between them. The anchor plates one and anchor plates two are vertically staggered to form at least one cell. The clamping plate is movably embedded in the cell, and the inner wall of the cell is inclined. The clamping plate includes an upper fixing plate, a lower fixing plate, and a limiting rope. The upper fixing plate and the lower fixing plate are symmetrically arranged to form a channel through which the steel strand can pass. The limiting rope is looped around the upper fixing plate and the lower fixing plate. The upper fixing plate and the lower fixing plate are provided with an extension plate vertically on the side away from the cell. The lifting assembly is located on one side of the anchor plate. Two anchoring assemblies are respectively located on the front and rear sides of the lifting assembly. After the steel strand passes through the anchor plate, it passes sequentially through the clamping plate in the first set of anchoring assemblies, the lifting assembly, and the clamping plate in the second set of anchoring assemblies.

[0005] Furthermore, the lifting assembly includes a base, a first telescopic assembly, and a second telescopic assembly. The two second telescopic assemblies are symmetrically arranged on both sides of the base, and at least one first telescopic assembly is arranged parallel between the two second telescopic assemblies. The steel strands in the same vertical column are located on one side of the first telescopic assembly. The first telescopic assembly and the second telescopic assembly extend longitudinally against the two anchoring assemblies to achieve tensioning of the steel strands.

[0006] Furthermore, both the first telescopic assembly and the second telescopic assembly include a fixed plate and a movable plate. The fixed plate is connected to the base, and two movable plates are symmetrically arranged on the front and rear sides of the fixed plate. A telescopic cylinder is provided between the movable plates and the fixed plate, and the movable plates are moved by controlling the telescopic cylinder.

[0007] Furthermore, the tensioning device also includes limiting strips, a plurality of which are arranged horizontally between the lifting assembly and the anchoring assembly near the anchor plate side, and the limiting strips limit the movement of the clamping pieces in the anchoring assembly near the anchor plate side.

[0008] Furthermore, the lifting assembly also includes a protective assembly, with two protective assemblies respectively located on the left and right sides of the lifting assembly. The protective assembly includes a vertical pole, a shifting rod, and a rotating rod. The vertical pole is vertically located on one side of the base. The shifting rod is parallel to the vertical pole and a telescopic hydraulic cylinder is provided between the two. The shifting rod is vertically located on one side of the limiting strip. Two rotating rods are rotatably located on one side of the shifting rod. A fixing tube is provided on the anchor plate. After rotation, the shifting rod is moved so that one end of the rotating rod is inserted into the fixing tube. One end of the rotating rod is detachably connected to the fixing tube.

[0009] Furthermore, the moving rod is provided with a rotating seat, and the rotating seat is provided with a track for the moving rod to slide on. The moving rod is provided with a limiting groove, and the fixed tube is provided with a limiting ring. After the moving rod is inserted into the fixed tube, it continues to move until the moving rod abuts against the limiting strip. At this time, the limiting ring locks the limiting groove, and then the moving rod is driven to move backward until the other end of the moving rod reaches the end of the track and stops.

[0010] Furthermore, the protective assembly also includes a plug rod, the fixing tube has an opening, and the rotating rod has a through hole at a position corresponding to the opening. The plug rod passes through the opening and the through hole to achieve a detachable connection between the fixing tube and the rotating rod.

[0011] Furthermore, the base has a telescopic function, which drives the first telescopic component to enter the gap between the steel strands in a vertical direction, and the base drives the second telescopic component to reach one side of the steel strand in a vertical direction.

[0012] Furthermore, the upper fixing piece and the lower fixing piece have protrusions at the four corners of the cell.

[0013] Furthermore, the movable plate within the second telescopic assembly is provided with multiple protrusions.

[0014] By adopting the above technical solution, the beneficial effects of the present invention are:

[0015] This invention uses two detachable anchor plates to alternately form an anchor. Compared with the traditional one-piece anchor, the one-piece assembled anchor plate supports installation from the side of the steel strand, making installation more convenient and flexible. By setting a clamp with an extension plate to grip the steel strand, the force-bearing area is increased.

[0016] This invention achieves precise tensioning of the steel strand by setting up parallel first and second telescopic components, while also supporting unilateral entry and exit of the steel strand, facilitating the assembly of the overall structure. The use of a fixed plate in conjunction with a moving plate ensures uniform force application in both longitudinal and transverse directions, improving the integrity of the entire lifting assembly and simplifying operation. Limiting strips further restrict the movement of the clamping pieces near the anchor plate, preventing excessive displacement of the steel strand during tensioning. Protective components are installed on both sides of the limiting strips, with a moving rod blocking the limiting strips and connecting to the anchor plate. This prevents displacement of the lifting assembly and provides safety protection during the tensioning process, preventing debris from flying due to steel strand breakage or clamping piece failure. A rotating seat with a track and a limiting groove, combined with the retraction action of the moving rod, not only achieves the squeezing effect of the moving rod on the limiting strip but also reserves space for subsequent movement of the limiting strip. At this point, the moving rod can also indirectly squeeze the clamping pieces, resulting in a higher degree of automation compared to manually squeezing each clamping piece individually using iron pipes.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0018] Undoubtedly, such and other objects of the present invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and figures.

[0019] To make the above and other objects, features and advantages of the present invention more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0021] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the prestressing tensioning device for prestressed steel strands according to the present invention;

[0024] Figure 2 This is a side view of the prestressing tensioning device for prestressed steel strands according to the present invention;

[0025] Figure 3 This is an exploded view of the prestressing tensioning device for prestressed steel strands according to the present invention;

[0026] Figure 4 This is an exploded view of the anchoring component structure of the prestressing tensioning device for prestressed steel strands according to the present invention;

[0027] Figure 5 This is a structural diagram of the clamps used in the prestressing tensioning device for prestressed steel strands according to the present invention;

[0028] Figure 6 This is a schematic diagram of the lifting component of the prestressing tensioning device for prestressed steel strands according to the present invention;

[0029] Figure 7 This is a schematic diagram of the protective component structure of the prestressed tensioning equipment for prestressed steel strands according to the present invention;

[0030] Explanation of key figure labels:

[0031] 1-Steel strand;

[0032] 2-Anchor plate;

[0033] 21-Fixing tube; 211-Limiting ring;

[0034] 3-Anchoring components;

[0035] 31-Anchor plate one; 32-Anchor plate two; 33-Clamping plate; 331-Upper fixing plate; 332-Lower fixing plate; 333-Limiting rope; 334-Extension plate; 335-Protrusion; 34-Groove;

[0036] 4-Lifting components;

[0037] 41-Base; 42-First telescopic assembly; 421-Fixed plate; 422-Moving plate; 43-Second telescopic assembly; 431-Protrusion; 44-Protective assembly; 441-Upright pole; 442-Moving pole; 4421-Turn seat; 4422-Rail; 443-Rotating rod; 4431-Limiting groove; 445-Insertion rod;

[0038] 5-Limit bar. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0040] Reference Figure 1-7 The present invention provides a technical solution: a prestressing tensioning device for prestressed steel strand 1, which is used for prestressing tensioning of steel strand 1.

[0041] The tensioning equipment includes anchor plate 2, anchoring assembly 3, and lifting assembly 4. Anchor plate 2 is embedded in the concrete surface. Anchoring assembly 3 includes anchor plate 1 31, anchor plate 2 32, and clamping plate 33. Several anchor plates 1 31 are arranged horizontally on the upper and lower sides of a single steel strand 1, and several anchor plates 2 32 are arranged vertically on the left and right sides of a single steel strand 1. Both anchor plates 1 31 and anchor plates 2 32 are provided with grooves 34 for nesting between them. Anchor plate 1 31 and anchor plate 2 32 are perpendicularly intersected to form at least one cell. Clip 33 is movably embedded in the cell. The inner wall of the cell is inclined, so that the opening of the cell on the side near the clip 33 is larger than the opening on the other side. Clip 33 includes an upper fixing plate 331, a lower fixing plate 332 and a limiting rope 333. The upper fixing plate 331 and the lower fixing plate 332 are symmetrically arranged to form a channel through which the steel strand 1 can pass. The limiting rope 333 is looped around the upper fixing plate 331 and the lower fixing plate 332. The upper fixing plate 331 and the lower fixing plate 332 are provided with an extension plate 334 on the side away from the cell. The lifting component 4 is located on one side of the anchor plate 2. Two anchoring components 3 are respectively located on the front and rear sides of the lifting component 4. After the steel strand 1 passes through the anchor plate 2, it passes through the clip 33 in the first set of anchoring components 3, the lifting component 4 and the clip 33 in the second set of anchoring components 3 in sequence.

[0042] To refine the tensioning force on the steel strand 1, the lifting assembly 4 includes a base 41, a first telescopic assembly 42, and a second telescopic assembly 43. Two second telescopic assemblies 43 are symmetrically arranged on both sides of the base 41, and at least one first telescopic assembly 42 is arranged parallel between the two second telescopic assemblies 43. Steel strands 1 in the same vertical column are located on one side of the first telescopic assembly 42. The first telescopic assembly 42 and the second telescopic assembly 43 extend longitudinally against two anchoring assemblies 3 to achieve tensioning of the steel strand 1. Specifically, both the first telescopic assembly 42 and the second telescopic assembly 43 include a fixed plate 421 and a movable plate 422. The fixed plate 421 is connected to the base 41. Two movable plates 422 are symmetrically arranged on the front and rear sides of the fixed plate 421, and a telescopic cylinder is provided between them. The movable plate 422 is moved by controlling the telescopic cylinder. To increase the limiting effect of the movable plate 422 on the anchoring assembly 3 and the limiting strip 5, multiple protrusions 431 are provided on the movable plate 422 within the second telescopic assembly 43. The first telescopic component 42 and the second telescopic component 43, arranged in parallel, can enter the side of the steel strand 1 by lifting and lowering. Therefore, the base 41 has a telescopic function. The base 41 drives the first telescopic component 42 to enter the gap of the steel strand 1 in the vertical direction, and the base 41 drives the second telescopic component 43 to reach one side of the steel strand 1 in the vertical direction. To increase the tightening effect of the cell on the clamping piece 33, the upper fixing piece 331 and the lower fixing piece 332 are provided with protrusions 335 at the four corners of the cell, and the protrusions 335 are nested with the four corners of the rectangular cell.

[0043] To enhance the limiting effect on the clamping piece 33 near the anchor plate and achieve safety protection, the tensioning device also includes a limiting strip 5. The length of the limiting strip 5 is greater than the length of the anchoring component 3. Several limiting strips 5 are arranged horizontally between the lifting component 4 and the anchoring component 3 near the anchor plate 2. Under the action of the lifting component 4, the limiting strip 5 abuts against the moving plate 422 to limit the movement of the clamping piece 33 in the anchoring component 3 near the anchor plate 2, preventing the clamping piece 33 from moving too much.

[0044] To enhance the automated nesting function between the clamping plates 33 and the cell during the installation of the tensioning equipment and to increase the protective effect, the lifting assembly 4 also includes a protective assembly 44. Two protective assemblies 44 are respectively located on the left and right sides of the lifting assembly 4. Each protective assembly 44 includes a vertical rod 441, a shifting rod 442, and a rotating rod 443. The vertical rod 441 is vertically positioned on one side of the base 41. The shifting rod 442 is parallel to the vertical rod 441, and a telescopic hydraulic cylinder is located between the two. The shifting rod 442 is vertically positioned on one side of the limiting strip 5. Two rotating rods 443 are rotatably mounted on one side of the moving rod 442. The anchor plate 2 is provided with a fixed tube 21. After rotation, the moving rod 442 is moved so that one end of the rotating rod 443 is inserted into the fixed tube 21. One end of the rotating rod 443 is detachably connected to the fixed tube 21. The specific connection method is as follows: the protective component 44 also includes a plug rod 445. The fixed tube 21 is provided with an opening. The rotating rod 443 is provided with a through hole at the position corresponding to the opening. The plug rod 445 passes through the opening and the through hole to realize the detachable connection between the fixed tube 21 and the rotating rod 443. To achieve clamping of the clips 33 and cell near the anchor plate 2 while leaving room for the movement of the limiting strip 5, a rotating seat 4421 is provided on the moving rod 442. The rotating seat 4421 is provided with a track 4422 for the moving rod 443 to slide on. A limiting groove 4431 is provided around the moving rod 443. A limiting ring 211 is provided inside the fixed tube 21. After the moving rod 443 is inserted into the fixed tube 21, it continues to move until the moving rod 442 abuts against the limiting strip 5. At this point, the limiting ring 211 locks the limiting groove 4431. Then, the moving rod 442 is driven to move backward until the other end of the moving rod 443 reaches the end of the track 4422 and stops.

[0045] Working principle: During installation, anchor plate 1 (31) and anchor plate 2 (32) are inserted through the side wall of steel strand 1 and assembled to form a cell. Then, clamping plates 33 are installed on each steel strand 1. The lifting assembly 4 is then activated to allow the first and second telescopic components to enter one side of the steel strand 1. The limiting strip 5 is then inserted between the anchoring assembly 3 and the lifting assembly 4 on the side near the anchor plate 2. The adjusting rod 443 is activated and the moving rod 442 is activated so that one side of the adjusting rod 443 is inserted into the fixing pipe 21. Then, the second anchoring assembly 3 is installed. The lifting assembly 4 is activated to tension the second anchoring assembly 3. After tensioning, the steel strand 1 retracts so that the clamping plates 33 are completely embedded in the cell. Then, the excess steel strand 1 is cut off and cement is poured in.

[0046] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0047] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0048] Furthermore, the described features or characteristics can be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented without the aforementioned specific details or may be implemented using other methods, components, materials, etc.

Claims

1. A prestressing tensioning device for prestressed steel strands, characterized in that, The system includes an anchor plate, an anchoring assembly, a lifting assembly, and a limiting strip. The anchor plate is embedded in the concrete surface. The anchoring assembly includes anchor plate one, anchor plate two, and a clamping plate. Several anchor plates one are arranged horizontally on the upper and lower sides of a single steel strand, and several anchor plates two are arranged vertically on the left and right sides of a single steel strand. Both anchor plates one and anchor plates two have grooves for nesting between them. The anchor plates one and anchor plates two are perpendicularly staggered to form at least one cell. The clamping plate is movably embedded in the cell, and the inner wall of the cell is an inclined surface. The clamping plate includes an upper fixing plate, a lower fixing plate, and a limiting rope. The upper fixing plate and the lower fixing plate are symmetrically arranged to form a channel through which the steel strand can pass. The limiting rope is looped around the upper fixing plate and the lower fixing plate. The upper fixing plate and the lower fixing plate are provided with an extension plate vertically on the side away from the cell. The lifting assembly is located on one side of the anchor plate. Two anchoring assemblies are respectively located on the front and rear sides of the lifting assembly. After the steel strand passes through the anchor plate, it passes through the clamping plate in the first set of anchoring assemblies, the lifting assembly, and the clamping plate in the second set of anchoring assemblies in sequence. The lifting assembly includes a base, a first telescopic assembly, and a second telescopic assembly. The two second telescopic assemblies are symmetrically arranged on both sides of the base, and at least one first telescopic assembly is arranged parallel between the two second telescopic assemblies. The steel strands in the same vertical column are located on one side of the first telescopic assembly. The first telescopic assembly and the second telescopic assembly extend longitudinally against the two anchoring assemblies to achieve tensioning of the steel strands. Several limiting strips are arranged horizontally between the lifting assembly and the anchoring assembly near the anchor plate, and the limiting strips limit the movement of the clamping pieces in the anchoring assembly near the anchor plate.

2. The prestressing tensioning device for prestressed steel strands according to claim 1, characterized in that, Both the first telescopic assembly and the second telescopic assembly include a fixed plate and a movable plate. The fixed plate is connected to the base. The two movable plates are symmetrically arranged on the front and rear sides of the fixed plate and are provided with a telescopic cylinder between them. The movable plates are moved by controlling the telescopic cylinder.

3. The prestressing tensioning device for prestressed steel strands according to claim 1, characterized in that, The lifting assembly also includes a protective assembly, with two protective assemblies respectively located on the left and right sides of the lifting assembly. The protective assembly includes a vertical pole, a shifting rod, and a rotating rod. The vertical pole is vertically located on one side of the base. The shifting rod is parallel to the vertical pole and a telescopic hydraulic cylinder is provided between the two. The shifting rod is vertically located on one side of the limiting strip. Two rotating rods are rotatably located on one side of the shifting rod. A fixing tube is provided on the anchor plate. After rotation, the shifting rod is moved so that one end of the rotating rod is inserted into the fixing tube. One end of the rotating rod is detachably connected to the fixing tube.

4. The prestressing tensioning device for prestressed steel strands according to claim 3, characterized in that, The moving rod is equipped with a rotating seat, which has a track for the moving rod to slide on. The moving rod is equipped with a limiting groove, and the fixed tube is equipped with a limiting ring. After the moving rod is inserted into the fixed tube, it continues to move until the moving rod abuts against the limiting strip. At this point, the limiting ring locks the limiting groove, and then the moving rod is driven to move backward until the other end of the moving rod reaches the end of the track and stops.

5. The prestressing tensioning device for prestressed steel strands according to any one of claims 3 or 4, characterized in that, The protective assembly also includes a plug rod, the fixing tube has an opening, and the rotating rod has a through hole at a position corresponding to the opening. The plug rod passes through the opening and the through hole to achieve a detachable connection between the fixing tube and the rotating rod.

6. The prestressing tensioning device for prestressed steel strands according to claim 5, characterized in that, The base has a telescopic function. The base drives the first telescopic component to enter the gap between the steel strands in a vertical direction, and the base drives the second telescopic component to reach one side of the steel strand in a vertical direction.

7. The prestressing tensioning device for prestressed steel strands according to claim 1, characterized in that, The upper fixing piece and the lower fixing piece have protrusions at the four corners of the cell.

8. The prestressing tensioning device for prestressed steel strands according to claim 6, characterized in that, The movable plate within the second telescopic assembly has multiple protrusions.

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