A prestressed threaded steel bar anchorage device

Abstract

The utility model discloses a prestressed threaded steel bar anchorage device, including backing plate, spiral muscle, fixed disc, petal type anchor disc, screw rod and clamping piece, spiral muscle is embedded in the concrete, and the insertion end of backing plate is located in spiral muscle, fixed disc is arranged in the outside of backing plate and slides, petal type anchor disc is arranged in the recess of fixed disc and slides, and petal type anchor disc is composed of a plurality of anchor blocks, screw rod is connected with anchor block through thread structure, and the inner end of screw rod is in close contact with fixed disc, clamping piece is installed in the conical hole of anchor block and slides, and clamping piece clamps the steel bar. The anchorage device can be used to anchor and tighten a plurality of anchor cables by petal type anchor disc and clamping piece, and when secondary adjustment tensioning is needed, the position of each anchor block in petal type anchor disc in fixed disc is adjusted in a certain stroke by screw rod, and the position of clamping piece is changed, and the steel bar is tightened. The anchorage device can tension the steel bar in a corresponding degree in a single or same situation, and the anchoring effect of the anchorage device is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of prestressed anchorage technology, and in particular to a prestressed threaded steel bar anchorage. Background Technology

[0002] Anchorages are components used for prestressing concrete during engineering construction. Low-retraction prestressed anchorages generally refer to prestressed anchorages that significantly reduce the retraction of the steel strands, achieving prestressing loss within 10%. During construction, the spiral steel bars are embedded in the concrete, and the anchor plate is also embedded in the concrete.

[0003] In general, when using prestressed threaded steel bar anchorages, most anchorages change the position of the anchor cup relative to the anchor plate by supporting nuts. The anchor cup then tensions the anchor cable (cable / steel bar) with the wedges to complete the prestressing tensioning. However, in cases where the anchor cables have different tension levels, such as bridge stay cables, sometimes multiple cables at different locations are combined into one anchorage for tensioning. For multiple anchor cables with different inclination angles and large length differences, it is difficult for a single anchorage to tighten each cable. This is because the anchor cables will deform differently due to bridge vibration or self-vibration. During tensioning, especially during secondary tensioning, traditional anchorages cannot be adapted to the tensioning work of each anchor cable. Utility Model Content

[0004] The purpose of this utility model is to provide a prestressed threaded steel bar anchorage to solve the problem that it is difficult for one anchorage to tension multiple anchor cables equally.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A prestressed threaded steel bar anchor includes a pad, a spiral bar, a fixing disc, a petal-shaped anchor disc, a threaded rod, and a wedge; The spiral reinforcement is embedded in the concrete, and the insertion end of the pad is located inside the spiral reinforcement; The fixed plate is slidably disposed on the outside of the pad; The petal-shaped anchor plate is slidably disposed in the groove of the fixed plate, and the petal-shaped anchor plate is composed of multiple anchor blocks; The screw is connected to the anchor block via a threaded structure, and the inner end of the screw abuts against the fixed plate; The clamping piece is slidably installed in the conical hole of the anchor block, and the clamping piece clamps the reinforcing bar.

[0006] A further technical solution is that the petal-shaped anchor plate has a plum blossom-shaped structure, and the groove is a plum blossom groove.

[0007] A further technical solution is that the fixed plate is provided with a positioning groove that is adapted to the screw.

[0008] A further technical solution is that the pad is provided with a grouting groove.

[0009] A further technical solution is that a grouting pipe is installed on the grouting groove via a threaded structure.

[0010] A further technical solution is that a baffle is provided in the channel of the pad.

[0011] A further technical solution is that the insertion end of the pad is provided with an annular protrusion.

[0012] A further technical solution is that a locking nut is threaded onto the screw.

[0013] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: This invention proposes a prestressed threaded steel bar anchorage. This anchorage uses a petal-shaped anchor plate and clamps to individually anchor and tighten multiple anchor cables. When secondary tensioning is required, a screw is used within a certain stroke to adjust the position of each anchor block in the petal-shaped anchor plate within the fixed plate, thereby changing the position of the clamps and tightening the steel bars. This anchorage can tension individual or similar steel bars to varying degrees, ensuring the anchoring effect. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of a prestressed threaded steel bar anchorage according to the present invention.

[0015] Figure 2 This utility model Figure 1 A schematic diagram of the structure of the petal-shaped anchor plate.

[0016] Figure 3 This utility model Figure 2 Another structural diagram.

[0017] Reference numerals in the attached diagram: 1. Pad; 2. Spiral reinforcement; 3. Fixing disc; 4. Petal-shaped anchor disc; 5. Screw; 6. Clamping plate; 7. Reinforcing bar; 8. Grouting groove; 9. Grouting pipe; 10. Baffle plate; 11. Annular protrusion; 12. Anti-reverse nut. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not 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 utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0024] This implementation example Figure 1 , Figure 2 and Figure 3 As shown, a prestressed threaded steel bar anchor includes a pad 1, a spiral bar 2, a fixing disc 3, a petal-shaped anchor disc 4, a screw 5, and a wedge 6; The spiral reinforcement 2 is embedded in the concrete, and the insertion end of the pad 1 is located inside the spiral reinforcement 2; The fixed plate 3 is slidably disposed on the outside of the pad 1; The petal-shaped anchor plate 4 is slidably disposed in the groove of the fixed plate 3, and the petal-shaped anchor plate 4 is composed of multiple anchor blocks; The screw 5 is connected to the anchor block through a threaded structure, and the inner end of the screw 5 is pressed against the fixed plate 3; The clamping piece 6 is slidably installed in the conical hole of the anchor block, and the clamping piece 6 clamps the reinforcing bar 7.

[0025] The working process of this utility model is as follows: When using the anchor to tension the steel bar 7, the steel bar 7 can be clamped in the clamping plate 6 for tensioning first. After the overall tensioning of the steel bar 7 is completed, if a second tensioning of the steel bar 7 is required, the screw 5 can be rotated to drive the petal-shaped anchor plate 4 for corresponding adjustment. Specifically, according to the different tightness of each or the same area of ​​steel bar 7, under the drive of the screw 5 and the restriction of the groove of the fixing plate 3, each anchor block can slide freely axially, thereby moving the clamping plate 6 to tension the steel bar 7.

[0026] Preferably, the petal-shaped anchor plate 4 has a plum blossom-shaped structure, and the groove is a plum blossom groove.

[0027] The petal-shaped anchor plate 4 and the groove adopt a plum blossom-shaped mating structure. Firstly, the anchor block in the petal-shaped anchor plate 4 is easy to position and install in the groove; secondly, it plays a sliding limiting role when the anchor block slides.

[0028] Preferably, the fixed plate 3 is provided with a positioning groove that is compatible with the screw 5.

[0029] The positioning groove is formed on the side of the fixed plate 3, and one end of the screw 5 is located in the positioning groove. The main purpose is to position the screw 5 and prevent it from shaking, so as to ensure the stability of the screw 5.

[0030] It is worth noting that the inner end of the screw 5 can also be directly rotatably connected to the side of the fixed plate 3. Compared with the design of the positioning groove, the direct rotatable connection is not convenient for disassembling and assembling the screw 5.

[0031] Preferably, a grouting groove 8 is provided on the pad 1. A grouting pipe 9 is installed on the grouting groove 8 via a threaded structure.

[0032] The grouting pipe 9 can be detached and installed on the grouting tank 8 to facilitate the pumping of cement into the grouting tank 8 and to fix the steel strand 7.

[0033] Preferably, a baffle plate 10 is provided in the channel of the pad 1.

[0034] The baffle 10 serves to prevent concrete from flowing into the anchor cup 4, anchor cylinder 5, and wedge 6, thus preventing it from affecting the normal use of the components.

[0035] Preferably, the insertion end of the pad 1 is provided with an annular protrusion 11.

[0036] The annular protrusion 11 serves to prevent detachment and slippage.

[0037] Preferably, a locking nut 12 is threaded onto the screw 5.

[0038] After the screw 5 tensions and adjusts the anchor block, the anti-reverse nut 12 on the screw 5 is screwed toward the anchor block to tighten it, thus achieving a further fixing effect.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A prestressed threaded steel bar anchorage, characterized in that: Includes pad (1), spiral reinforcement (2), fixing plate (3), petal-shaped anchor plate (4), screw (5) and clamp (6); The spiral reinforcement (2) is embedded in the concrete, and the insertion end of the pad (1) is located inside the spiral reinforcement (2); The fixed plate (3) is slidably disposed on the outside of the pad (1); The petal-shaped anchor plate (4) is slidably disposed in the groove of the fixed plate (3), and the petal-shaped anchor plate (4) is composed of multiple anchor blocks; The screw (5) is connected to the anchor block through a threaded structure, and the inner end of the screw (5) abuts against the fixed plate (3); The clamping piece (6) is slidably installed in the conical hole of the anchor block, and the clamping piece (6) clamps the reinforcing bar (7).

2. The prestressed threaded steel bar anchorage according to claim 1, characterized in that: The petal-shaped anchor plate (4) has a plum blossom-shaped structure, and the groove is a plum blossom groove.

3. The prestressed threaded steel bar anchorage according to claim 1, characterized in that: The fixed plate (3) is provided with a positioning groove that is compatible with the screw (5).

4. The prestressed threaded steel bar anchorage according to claim 1, characterized in that: The pad (1) is provided with a grouting groove (8).

5. The prestressed threaded steel bar anchorage according to claim 4, characterized in that: The grouting groove (8) is fitted with a grouting pipe (9) via a threaded structure.

6. The prestressed threaded steel bar anchorage according to claim 1, characterized in that: A baffle (10) is provided in the channel of the pad (1).

7. The prestressed threaded steel bar anchorage according to claim 1, characterized in that: The insertion end of the pad (1) is provided with an annular protrusion (11).

8. The prestressed threaded steel bar anchorage according to claim 1, characterized in that: The screw (5) is threaded with a backstop nut (12).

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