Combined prestressed anchorage device

Abstract

The utility model discloses a combined prestressed anchorage device which comprises an anchor backing plate, anchor side plates are fixedly connected to the two sides of the anchor backing plate, and grouting openings are formed in the inner sides of the anchor side plates. The corrugated pipe is fixedly connected to the inner side of the anchor bearing plate, the outer side of the anchor bearing plate is fixedly connected with a spiral rib, and the spiral rib is arranged on the outer side of the corrugated pipe; and the steel strand penetrates through the corrugated pipe and the inner side of the anchor bearing plate. According to the combined prestressed anchorage device, the upper taper pipe is rotated to move towards the lower taper pipe, and when the upper taper pipe moves towards the lower taper pipe, the first gasket and the second gasket are in contact and extrude each other, so that the first telescopic spring and the second telescopic spring at the two ends are compressed; the first telescopic spring and the second telescopic spring push the first clamping piece and the second clamping piece on the inner side of the lower taper pipe and the inner side of the upper taper pipe to move towards taper openings in the bottoms of the lower taper pipe and the upper taper pipe, the first clamping piece and the second clamping piece are oppositely closed through the taper openings, and the outer side of the steel strand is clamped and fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of anchor devices, and particularly relates to a combined prestressed anchor device. Background Technique

[0002] A prestressed anchor device is an anchoring tool applied in industries such as civil engineering. It is mainly used to transfer the prestress of prestressed steel bars to concrete or other structures, thereby ensuring the stability and durability of the structure.

[0003] A combined prestressed anchor device with the application number CN202111039038.6 includes a housing. The lower part of the inner side wall of the housing is fixedly connected with a support rod. The lower end of the support rod is fixedly connected with a corrugated pipe. The lower end of the housing is fixedly connected with a threaded rib. A round hole is opened at the top of the housing. The inner side wall of the round hole is slidably connected with a threaded cylinder. The upper end of the threaded cylinder is movably connected with a clamping piece. The outer side of the threaded cylinder is threadedly connected with a sleeve. Cavities are opened on both the left and right sides inside the threaded cylinder. A limiting rod is fixedly connected to the lower end inside the cavity of the housing. After the clamping piece enters the inside of the threaded cylinder, by rotating the sleeve to drive the threaded cylinder to move upward, the prestress lost when the clamping piece moves inward during recovery can be compensated, so that the prestress can reach the set ideal prevalue as much as possible, and the possibility of damage to the building due to unqualified prestress in the later stage is avoided as much as possible.

[0004] This device drives the semi-circular clamping blocks at both ends to move towards each other by rotating the threaded rod, thereby pushing the clamping pieces at both ends to clamp and fix the two ends of the steel strand. Although this structure can achieve the purpose of clamping the steel strand, the clamping points of this device are too single. Relying on the clamping at a single point is extremely likely to cause slipping between the outer surface of the steel strand and the clamping piece due to insufficient friction. Moreover, there is no limiting structure on the outer side of the threaded rod, and the threaded rod is likely to become loose when there is vibration or impact, resulting in insufficient clamping force of the clamping pieces on both sides on the steel strand.

[0005] In view of the above problems, it is urgent to innovate and design on the basis of the original structure of the combined prestressed anchor device. Content of the Utility Model

[0006] The purpose of the utility model is to provide a combined prestressed anchor device to solve the problems proposed in the above background technique, that is, the clamping points of this device are too single. Relying on the clamping at a single point is extremely likely to cause slipping between the outer surface of the steel strand and the clamping piece due to insufficient friction. Moreover, there is no limiting structure on the outer side of the threaded rod, and the threaded rod is likely to become loose when there is vibration or impact, resulting in insufficient clamping force of the clamping pieces on both sides on the steel strand.

[0007] To achieve the above object, the present utility model provides the following technical solutions: A combined prestressed anchor, comprising an anchor backing plate, on both sides of which are fixedly connected with anchor side plates, and a grouting port is arranged inside the anchor side plates; a corrugated pipe, which is fixedly connected inside the anchor backing plate, and a spiral reinforcement is fixedly connected outside the anchor backing plate, and the spiral reinforcement is arranged outside the corrugated pipe; a steel strand, which penetrates through the inside of the corrugated pipe and the anchor backing plate; a clip assembly, which is arranged outside the anchor backing plate, and the clip assembly and the steel strand inside the anchor backing plate are distributed in a one-to-one correspondence; wherein, through the clip assembly, the steel strand can be clamped and fixed.

[0008] Preferably, the clip assembly includes a lower cone tube, a threaded pipe sleeve, an upper cone tube and a threaded groove. The lower cone tube is fixedly installed outside the anchor backing plate, and the threaded pipe sleeve is fixedly installed outside the lower cone tube. The outside of the lower cone tube is connected with the upper cone tube, and the threaded groove is arranged inside the upper cone tube, and the threaded groove and the threaded pipe sleeve are in threaded connection.

[0009] Preferably, the clip assembly further includes a first clip and a second clip. The first clip and the second clip are installed inside the lower cone tube and the upper cone tube, and the first clip and the second clip are semi-circular structures when viewed from the front, and the first clip and the second clip are distributed symmetrically about the midpoint of the steel strand.

[0010] Preferably, the steel strand penetrates through the inside of the lower cone tube and the upper cone tube.

[0011] Preferably, the first clip and the second clip are conical structures when viewed from the side.

[0012] Preferably, the clip assembly further includes a first telescopic spring and a first gasket. The first telescopic spring is installed inside the lower cone tube, and the first telescopic spring is arranged at the upper ends of the first clip and the second clip, and a first gasket is arranged at the upper end of the first telescopic spring.

[0013] Preferably, the clip assembly further includes a second telescopic spring and a second gasket. The second telescopic spring is installed inside the upper cone tube, and the second telescopic spring is arranged at the upper ends of the first clip and the second clip, and a second gasket is arranged at the upper end of the second telescopic spring.

[0014] Compared with the prior art, the beneficial effects of the present utility model are that the combined prestressed anchor is provided with:

[0015] 1. The structure of multi-point clamping. In this structure, the first clamping piece and the second clamping piece are respectively installed on the inner sides of the lower conical tube and the upper conical tube. When it is necessary to clamp and fix the tail of the steel strand, by rotating the upper conical tube, the upper conical tube moves towards the lower conical tube. When the upper conical tube moves towards the lower conical tube, the first gasket will contact and squeeze the second gasket, thereby compressing the first telescopic spring and the second telescopic spring at both ends. The first telescopic spring and the second telescopic spring will push the first clamping piece and the second clamping piece on the inner sides of the lower conical tube and the upper conical tube towards the bottom conical openings of the lower conical tube and the upper conical tube. Through the conical openings, the first clamping piece and the second clamping piece move closer together to clamp and fix the outside of the steel strand.

[0016] 2. The anti-loosening structure. When the first telescopic spring and the second telescopic spring push the first clamping piece and the second clamping piece to move, at the same time, the first telescopic spring and the second telescopic spring will generate a reaction force on the lower conical tube and the upper conical tube through their own elastic forces, so as to prevent the lower conical tube and the upper conical tube from loosening due to external influences such as vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic three-dimensional structure diagram of the whole utility model;

[0018] Figure 2 It is a schematic rear view structure diagram of the whole utility model;

[0019] Figure 3 It is a schematic connection structure diagram of the lower conical tube and the upper conical tube of the utility model;

[0020] Figure 4 It is a schematic three-dimensional structure diagram of the clamping piece assembly of the utility model;

[0021] Figure 5 It is a schematic exploded structure diagram of the lower conical tube of the utility model;

[0022] Figure 6 It is a schematic three-dimensional structure diagram of the first clamping piece and the second clamping piece of the utility model.

[0023] In the figure: 1, anchor backing plate; 2, anchor side plate; 3, grouting port; 4, corrugated pipe; 5, spiral rib; 6, steel strand; 7, clamping piece assembly; 701, lower conical tube; 702, threaded pipe sleeve; 703, first clamping piece; 704, second clamping piece; 705, first telescopic spring; 706, first gasket; 707, upper conical tube; 708, second telescopic spring; 709, second gasket; 710, threaded groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1 - 6 , the present invention provides a technical solution: a combined prestressed anchor, including: an anchor backing plate 1, with anchor side plates 2 fixedly connected to both sides of the anchor backing plate 1, and a grouting port 3 is provided inside the anchor side plates 2; a corrugated pipe 4, the corrugated pipe 4 is fixedly connected inside the anchor backing plate 1, and a spiral rib 5 is fixedly connected to the outside of the anchor backing plate 1, and the spiral rib 5 is arranged outside the corrugated pipe 4; a steel strand 6, the steel strand 6 penetrates through the corrugated pipe 4 and the inside of the anchor backing plate 1; a wedge grip assembly 7, the wedge grip assembly 7 is arranged outside the anchor backing plate 1, and the wedge grip assembly 7 and the steel strand 6 inside the anchor backing plate 1 are distributed in a one-to-one correspondence; wherein, through the wedge grip assembly 7, the steel strand 6 can be clamped and fixed.

[0026] The wedge grip assembly 7 includes a lower tapered pipe 701, a threaded pipe sleeve 702, an upper tapered pipe 707 and a threaded groove 710. The lower tapered pipe 701 is fixedly installed outside the anchor backing plate 1, and the threaded pipe sleeve 702 is fixedly installed on the outside of the lower tapered pipe 701. The outside of the lower tapered pipe 701 is connected to the upper tapered pipe 707, and a threaded groove 710 is provided inside the upper tapered pipe 707, and the threaded groove 710 is in threaded connection with the threaded pipe sleeve 702; the wedge grip assembly 7 further includes a first wedge grip 703 and a second wedge grip 704. The first wedge grip 703 and the second wedge grip 704 are installed inside the lower tapered pipe 701 and the upper tapered pipe 707, and the first wedge grip 703 and the second wedge grip 704 are semi-circular structures when viewed from the front, and the first wedge grip 703 and the second wedge grip 704 are distributed symmetrically about the midpoint of the steel strand 6; the steel strand 6 penetrates through the inside of the lower tapered pipe 701 and the upper tapered pipe 707; the first wedge grip 703 and the second wedge grip 704 are tapered structures when viewed from the side; the wedge grip assembly 7 further includes a first telescopic spring 705 and a first gasket 706. The first telescopic spring 705 is installed inside the lower tapered pipe 701, and the first telescopic spring 705 is arranged above the first wedge grip 703 and the second wedge grip 704, and a first gasket 706 is provided at the upper end of the first telescopic spring 705; the wedge grip assembly 7 further includes a second telescopic spring 708 and a second gasket 709. The second telescopic spring 708 is installed inside the upper tapered pipe 707, and the second telescopic spring 708 is arranged above the first wedge grip 703 and the second wedge grip 704, and a second gasket 709 is provided at the upper end of the second telescopic spring 708.

[0027] When this structure is working, first, the steel strand 6 passes through the inside of the corrugated pipe 4, and its head end extends through the inside of the anchor plate 1 and penetrates through the inside of the lower tapered pipe 701 and the upper tapered pipe 707. Subsequently, a jack or other tensile equipment is used to pull the steel strand 6 to increase the prestress. When the prestress of the building is reached, the upper tapered pipe 707 is rotated, so that the upper tapered pipe 701 moves towards the lower tapered pipe 707. When the upper tapered pipe 701 moves towards the lower tapered pipe 707, the first gasket 706 will contact and squeeze the second gasket 709, thereby compressing the first expansion springs 705 and the second expansion springs 708 at both ends. The first expansion springs 705 and the second expansion springs 708 will push the first clamping pieces 703 and the second clamping pieces 704 inside the lower tapered pipe 701 and the upper tapered pipe 707 towards the bottom tapered openings of the lower tapered pipe 701 and the upper tapered pipe 707. Through the tapered openings, the first clamping pieces 703 and the second clamping pieces 704 are moved closer together to clamp and fix the outside of the steel strand 6. By clamping the steel strand 6 at multiple points, the head end of the steel strand 6 is fixed, avoiding the movement of the head end of the steel strand 6. After the fixing is completed, the tensioner is removed, and the excess part of the head end of the steel strand 6 is removed. Subsequently, the installation of the entire device can be completed by injecting slurry into the inside of the anchor plate 1 through the grouting port 3. And when the first expansion springs 705 and the second expansion springs 708 push the first clamping pieces 703 and the second clamping pieces 704 to move, at the same time, the first expansion springs 705 and the second expansion springs 708 will generate a reaction force on the lower tapered pipe 701 and the upper tapered pipe 707 through their own elastic forces, thereby preventing the lower tapered pipe 701 and the upper tapered pipe 707 from loosening due to external influences such as vibration.

[0028] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined prestressed anchor, characterized in that, It includes: Anchorage plate (1), on both sides of the anchorage plate (1), there are fixedly connected anchorage side plates (2), and a grouting port (3) is provided inside the anchorage side plates (2); Corrugated pipe (4), the corrugated pipe (4) is fixedly connected inside the anchorage plate (1), and a spiral reinforcement (5) is fixedly connected to the outside of the anchorage plate (1), and the spiral reinforcement (5) is arranged outside the corrugated pipe (4); Steel strand (6), the steel strand (6) penetrates through the inside of the corrugated pipe (4) and the anchorage plate (1); Wedge grip assembly (7), the wedge grip assembly (7) is arranged outside the anchorage plate (1), and the wedge grip assembly (7) and the steel strand (6) inside the anchorage plate (1) are distributed in a one-to-one correspondence; wherein, Through the wedge grip assembly (7), the steel strand (6) can be clamped and fixed.

2. The combined prestressed anchor described in claim 1, wherein: The wedge grip assembly (7) includes a lower cone tube (701), a threaded pipe sleeve (702), an upper cone tube (707) and a threaded groove (710). The lower cone tube (701) is fixedly installed on the outside of the anchorage plate (1), and a threaded pipe sleeve (702) is fixedly installed on the outside of the lower cone tube (701). The outside of the lower cone tube (701) is connected to the upper cone tube (707), and a threaded groove (710) is provided inside the upper cone tube (707), and the threaded groove (710) and the threaded pipe sleeve (702) are in threaded connection.

3. The combined prestressed anchor according to claim 2, characterized in that: The wedge grip assembly (7) further includes a first wedge grip (703) and a second wedge grip (704). The first wedge grip (703) and the second wedge grip (704) are installed inside the lower cone tube (701) and the upper cone tube (707). When viewed from the front, the first wedge grip (703) and the second wedge grip (704) are semi-circular structures, and the first wedge grip (703) and the second wedge grip (704) are distributed symmetrically about the midpoint of the steel strand (6).

4. The combined prestressed anchor according to claim 3, characterized in that: The steel strand (6) penetrates through the inside of the lower cone tube (701) and the upper cone tube (707).

5. The combined prestressed anchor described in claim 3, wherein: When viewed from the side, the first wedge grip (703) and the second wedge grip (704) are conical structures.

6. The combined prestressed anchor according to claim 3, wherein: The wedge grip assembly (7) further includes a first telescopic spring (705) and a first gasket (706). The first telescopic spring (705) is installed inside the lower cone tube (701), and the first telescopic spring (705) is arranged at the upper ends of the first wedge grip (703) and the second wedge grip (704). A first gasket (706) is provided at the upper end of the first telescopic spring (705).

7. A combined prestressed anchor as claimed in claim 6, wherein: The wedge grip assembly (7) further includes a second telescopic spring (708) and a second gasket (709). The second telescopic spring (708) is installed inside the upper cone tube (707), and the second telescopic spring (708) is arranged at the upper ends of the first wedge grip (703) and the second wedge grip (704). A second gasket (709) is provided at the upper end of the second telescopic spring (708).

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