Prestressed tendon tensioning device

Abstract

The utility model discloses a prestressed tendon tensioning device, which aims to effectively solve the problem of large waste of prestressed tendon materials during the tensioning process in the background technology. To this end, the prestressed tendon tensioning device provided by the utility model includes a permanent anchor plate, a limit plate, a tool anchor plate, a pull rod and a through-type hydraulic jack. The prestressed tendon passes through the first anchor hole on the permanent anchor plate, the through hole on the limit plate and the second anchor hole on the tool anchor plate in sequence. The first anchor hole is provided with a first anchor clip sleeved on the prestressed tendon, and the second anchor hole is provided with a second anchor clip sleeved on the prestressed tendon. One end of the pull rod is detachably fixedly connected to the tool anchor plate, and the other end is detachably fixedly connected to the push piston of the through-type hydraulic jack.

Description

Technical Field

[0001] The utility model belongs to the field of prestressed concrete reinforcement, in particular to a prestressed tendon tensioning device. Background Art

[0002] Prestressed concrete is widely used in bridge structures. As the main load-bearing structure of bridge structures, jack equipment is usually used for tensioning. The traditional tensioning device installs the tool anchor and anchor clip at the rear end of the through-type hydraulic jack, and the steel strand runs through the through-type hydraulic jack. The prestressed tendons are tensioned by supplying and returning oil to the through-type hydraulic jack. The above tensioning method is because the prestressed tendons run through the through-type hydraulic jack. After the tensioning is completed, the extra-long prestressed tendons need to be cut off to complete the anchor sealing work, which will cause a large waste of prestressed tendon materials. Summary of the invention

[0003] The main purpose of the utility model is to provide a prestressed tendon tensioning device, aiming to effectively solve the problem of large waste of prestressed tendon materials during the tensioning process in the background technology.

[0004] To this end, the prestressed tendon tensioning device provided by the utility model includes a permanent anchor plate, a limit plate and a through-type hydraulic jack. The through-type hydraulic jack is abutted against the limit plate. A tool anchor plate and a pull rod are arranged in the through-type hydraulic jack. The prestressed tendon (not shown in the figure) passes through the first anchor hole on the permanent anchor plate, the through hole on the limit plate and the second anchor hole on the tool anchor plate in sequence. The first anchor hole is provided with a first anchor clip sleeved on the prestressed tendon, and the second anchor hole is provided with a second anchor clip sleeved on the prestressed tendon. One end of the pull rod is detachably fixedly connected to the tool anchor plate, and the other end is detachably fixedly connected to the push piston of the through-type hydraulic jack.

[0005] Specifically, the tool anchor plate is externally threadedly connected to an outer sleeve, and the pull rod is fixedly connected to the outer sleeve.

[0006] Specifically, the pull rod is threadedly connected to the outer sleeve.

[0007] Specifically, a pull rod anchor block is fixedly provided at the front end of the push piston of the through-type hydraulic jack, and the pull rod is fixedly connected to the pull rod anchor block after passing through the through-type hydraulic jack.

[0008] Specifically, the tie rod is threadedly connected to the tie rod anchor block.

[0009] Compared with the prior art, the utility model has the following beneficial effects: by adding a tool anchor and a pull rod between the permanent anchor plate and the through-type hydraulic jack, the prestressed tendons are connected by using the tool anchor plate and the second anchor clip, and the tool anchor plate and the through-type hydraulic jack are connected by using the pull rod. During tensioning, one end of the through-type hydraulic jack is supported on the limit plate, and the pull rod passes through the through-type hydraulic jack and is connected to the push piston to form a prestressed tendon tensioning device. The prestressed tendons do not need to pass through the through-type hydraulic jack. Therefore, the problem of wasting steel strands in prestressed tendon tensioning can be effectively solved, and the loss of steel strands can be effectively controlled, which has the advantages of saving time, labor, and materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 It is an exploded schematic diagram of a prestressed tendon tensioning device provided in an embodiment of the utility model;

[0012] Figure 2 It is a schematic diagram of the structure of the limit plate and the tool anchor plate provided in the embodiment of the utility model;

[0013] Among them: 1. Permanent anchor plate; 2. Limit plate; 3. Tool anchor plate; 4. Pull rod; 5. Through-type hydraulic jack; 6. First anchor clip; 7. Second anchor clip; 8. Outer sleeve; 9. Pull rod anchor block; 10. Steel anchor pad. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] 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", "axial", "radial", "circumferential" and the like 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0016] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0017] See also Figure 1 and Figure 2 A prestressed tendon tensioning device includes a permanent anchor plate 1, a limit plate 2 and a through-type hydraulic jack 5. The through-type hydraulic jack 5 is in contact with the limit plate 2. A tool anchor plate 3 and a pull rod 4 are arranged inside the through-type hydraulic jack 5. The prestressed tendon (not shown in the figure) passes through the first anchor hole on the permanent anchor plate 1, the through hole on the limit plate 2 and the second anchor hole on the tool anchor plate 3 in sequence. The first anchor hole is provided with a first anchor clip 6 sleeved on the prestressed tendon. The second anchor hole is provided with a second anchor clip 7 sleeved on the prestressed tendon. One end of the pull rod 4 is detachably fixedly connected to the tool anchor plate 3, and the other end is detachably fixedly connected to the push piston of the through-type hydraulic jack 5. As for the specific structures of the through-type hydraulic jack 5, the anchor plate and the anchor clip, they are all existing structures and will not be repeated here.

[0018] This embodiment adds a tool anchor and a pull rod 4 between the permanent anchor plate 1 and the through-type hydraulic jack 5, uses the tool anchor plate 3 and the second anchor clip 7 to connect the prestressed tendons, and uses the pull rod 4 to connect the tool anchor plate 3 and the through-type hydraulic jack 5. During tensioning, one end of the through-type hydraulic jack 5 is supported on the limit plate 2, and the pull rod 4 passes through the through-type hydraulic jack 5 and is connected to the push piston to form a prestressed tendon tensioning device. The prestressed tendons do not need to pass through the through-type hydraulic jack 5. Therefore, the problem of wasting steel strands in prestressed tendon tensioning can be effectively solved, and the loss of steel strands can be effectively controlled, which has the advantages of saving time, labor, and materials.

[0019] See also Figure 1 and Figure 2In some embodiments, the outer wall of the tool anchor plate 3 is provided with an external thread, the inner wall of the outer sleeve 8 is provided with an internal thread, the outer sleeve 8 is screwed and sleeved on the outside of the tool anchor plate 3 through the cooperation of the internal and external threads, and the pull rod 4 is directly fixedly connected to the outer sleeve 8. In this way, the pull rod 4 and the tool anchor plate 3 are easy to disassemble and assemble. In addition, to further facilitate assembly, the pull rod 4 and the outer sleeve 8 can also be connected by threads, that is, the pull rod 4 and the outer sleeve 8 can also be disassembled and separated.

[0020] Specifically, a pull rod anchor block 9 is fixedly provided at the front end of the push piston of the through-type hydraulic jack 5, and the pull rod 4 is fixedly connected to the pull rod anchor block 9 after passing through the through-type hydraulic jack 5. Among them, in order to facilitate the disassembly and assembly of the pull rod 4, the pull rod 4 and the pull rod anchor block 9 can be connected by threads.

[0021] When the prestressed tendons are tensioned using the tensioning device, the corrugated pipe, spiral tendons and anchor steel plates are installed at the designated positions of the bridge structure. After the concrete of the bridge structure is poured and cured for a period of time, the prestressed tendons are installed at the designated positions of the bridge structure, and the permanent anchor plate 1 and the first anchor clip 6 are respectively installed at the anchoring end and the tensioning end of the prestressed tendons.

[0022] See also Figure 1 According to the number, arrangement and tensioning tonnage of the steel strands of the prestressed tendons, the factory customizes and produces the matching limit plate 2, tool anchor plate 3, second anchor clip 7, outer sleeve 8, tie rod 4, tie rod anchor block 9, through-type hydraulic jack 5 and permanent anchor. The tie rod anchor block 9 is fixed to the front end of the push piston of the through-type hydraulic jack, and the prestressed tendons are passed through the first anchor hole on the permanent anchor plate 1, the through hole on the limit plate 2 and the second anchor hole on the tool anchor plate 3 in sequence. A prestressed tendon is provided in the first anchor hole. The first anchor clip 6 is provided on the tool anchor plate 3, and the second anchor clip 7 which is sleeved on the prestressed tendon is provided in the second anchor hole. The front end of the pull rod 4 is passed through the through-type hydraulic jack 5 and is threadedly connected with the pull rod anchor block 9, and the rear end is threadedly connected with the outer sleeve 8. The outer sleeve 8 is screwed and fixed on the tool anchor plate 3, and the rear end face of the permanent anchor plate 1 is supported on the steel anchor pad 10, and the rear end face of the limit plate 2 is supported on the permanent anchor plate 1. The tool anchor plate 3, the outer sleeve 8 and the pull rod 4 are accommodated in the inner cavity of the through-type hydraulic jack 5.

[0023] The rear end of the through-type hydraulic jack 5 is supported on the limit plate 2. The through-type hydraulic jack 5 is connected to an external oil pump. The through-type hydraulic jack 5 is refueled by the external oil pump to drive the pull rod anchor block 9 to move forward, and then drive the combined connecting part of the pull rod 4 and the outer sleeve 8 to drive the tool anchor plate 3 to move forward, so as to realize the tensioning of the prestressed tendons. After the tensioning is completed, the oil is returned until the through-type hydraulic jack 5 returns to its original state.

[0024] Remove the external oil pump, and remove the through-type hydraulic jack, tie rod 4, tie rod anchor block 9, outer sleeve 8, tool anchor plate 3, second anchor clip 7, and limit plate 2, cut off the excess exposed prestressed steel strands, and carry out the concrete pouring inside the corrugated pipe and the prestressed steel anchor sealing construction.

[0025] In this embodiment, the steel strands of the prestressed tendons do not need to pass through the jack, which can save a lot of steel strands. The tool anchor and the outer sleeve adopt a spiral thread connection method, which greatly improves the work efficiency.

[0026] Unless otherwise stated, any technical solution disclosed in the above utility model, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many implementable numerical values. Since there are too many numerical values ​​to be exhaustive, the utility model discloses only some numerical values ​​to illustrate the technical solution of the present invention, and the numerical values ​​listed above should not constitute a limitation on the protection scope of the invention.

[0027] At the same time, if the above-mentioned utility model discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).

[0028] In addition, the terms used in any technical solution disclosed in the above utility model to indicate positional relationship or shape include the state or shape that is similar, similar or close to it unless otherwise stated. Any component provided by the utility model can be assembled from multiple separate components, or it can be a separate component manufactured by an integrated molding process.

[0029] The above embodiments are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. The obvious changes or modifications derived from these are still within the scope of protection of the present invention.

Claims

1. A prestressed tendon tensioning device, characterized in that: The invention comprises a permanent anchor plate (1), a limit plate (2) and a through-type hydraulic jack (5), wherein the through-type hydraulic jack (5) is in contact with the limit plate (2), a tool anchor plate (3) and a pull rod (4) are arranged inside the through-type hydraulic jack (5), and the prestressed tendons pass through the first anchor hole on the permanent anchor plate (1), the through hole on the limit plate (2) and the second anchor hole on the tool anchor plate (3) in sequence, the first anchor hole is provided with a first anchor clip (6) sleeved on the prestressed tendons, the second anchor hole is provided with a second anchor clip (7) sleeved on the prestressed tendons, one end of the pull rod (4) is detachably fixedly connected to the tool anchor plate (3), and the other end is detachably fixedly connected to the push piston of the through-type hydraulic jack (5).

2. The prestressed tendon tensioning device according to claim 1, characterized in that: The tool anchor plate (3) is externally threadedly connected to an outer sleeve (8), and the pull rod (4) is fixedly connected to the outer sleeve (8).

3. The prestressed tendon tensioning device according to claim 2, characterized in that: The pull rod (4) is threadedly connected to the outer sleeve (8).

4. The prestressed tendon tensioning device according to any one of claims 1 to 3, characterized in that: A pull rod anchor block (9) is fixedly provided at the front end of the push piston of the through-type hydraulic jack (5), and the pull rod (4) is fixedly connected to the pull rod anchor block (9) after passing through the through-type hydraulic jack (5).

5. The prestressed tendon tensioning device according to claim 4, characterized in that: The pull rod (4) is threadedly connected to the pull rod anchor block (9).

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