CN214169673U - Clamping body for anchoring steel strand and steel strand anchoring structure - Google Patents

Abstract

The utility model discloses a clamping body for anchoring a steel strand and a steel strand anchoring structure, wherein the clamping body consists of more than two sub-clamping pieces; the outer surface of the clamping body is a conical surface and is used for being matched with an anchorage device with a conical hole, the inner hole of the clamping body is provided with a spiral groove, the spiral groove is used for being matched with a spiral protrusion on the outer surface of the steel strand, and the inner surface of the spiral groove is of a smooth structure. The utility model discloses a clamping body and steel strand wires anchor structure for anchoring steel strand wires, can not damage the steel strand wires in the process of clamping the steel strand wires and tensioning the steel strand wires, and the clamping body can also anchor at any position of the steel strand wires; and the rotation of the clamping body in the taper hole is further limited through the rotation stopping structure, so that the safety performance of the bridge is improved.

Description

Clamping body for anchoring steel strand and steel strand anchoring structure

Technical Field

The utility model relates to a steel strand wires anchor clamps field especially relates to a holding body and steel strand wires anchor structure for anchoring steel strand wires.

Background

At present, the conventional steel strand anchoring usually adopts an internal thread clamping piece to anchor, the internal thread clamping piece generally comprises two or three structures, the assembled hollow cone is provided with a thread, the outer surface of the cone is matched with an anchor plate with a taper hole, and the hollow thread in the clamping piece can damage the steel strand when the steel strand is anchored by the clamping piece in the prior art. According to the requirements of relevant standards of the stay cable, the steel strand section between the anchorage devices at the two ends of the stay cable cannot be damaged, the internal thread clamping pieces can only be anchored at the two ends of the steel strand, and the range of the internal thread clamping pieces on the anchoring of the steel strand is narrow.

In the prior art, for example, chinese patent CN208777560U discloses a high-performance steel strand anchor clip, which includes a clip body, wherein an axial thread groove is formed on the clip body, the cross section of the thread groove is 1/2 of the cross section of a steel strand, the thread groove on the clip body is divided into a first groove body, a second groove body and a third groove body, the first groove body, the second groove body and the third groove body are all provided with threads parallel to the end of the clip, the first groove body, the second groove body and the third groove body are all arranged obliquely, and the inclination angle of the first groove body, the second groove body and the third groove body is the same as the twist angle of the steel strand and is 9 degrees; the inclination directions of the first tank body, the second tank body and the third tank body are the same as the twisting direction of the steel strand. Although the structure inside the clamping piece is optimized in the prior art, in the using process, under the condition that the steel strand is clamped by the clamping piece, the steel strand is inevitably damaged by the tooth patterns inside the groove body, and when the pulling force of the steel strand is large, the situation that the clamping piece rotates in the taper hole of the anchorage device still exists, so that the safety of a bridge cannot be guaranteed.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a clamping body and steel strand wires anchor structure for anchor steel strand wires aims at solving the inside insection damage steel strand wires of current clamping body, the clamping body can not be used in the middle of the both ends ground tackle steel strand wires, and the clamping body rotates in the ground tackle taper hole and influences bridge safety scheduling problem.

The utility model discloses take following technical scheme to realize above-mentioned purpose:

a clamping body for anchoring a steel strand consists of more than two sub-clamping pieces; the outer surface of the clamping body is a conical surface and is used for being matched with an anchorage device with a conical hole, the inner hole of the clamping body is provided with a spiral groove, the spiral groove is used for being matched with a spiral protrusion on the outer surface of the steel strand, and the inner surface of the spiral groove is of a smooth structure.

According to the technical scheme, the steel strand is clamped by the clamping body with the inner hole provided with the spiral groove, each steel wire unit on the periphery of the steel strand is matched with the corresponding groove, the inner surface of each groove is a smooth curved surface with structures without threads, protrusions and the like, and the spiral groove is used for limiting the movement of the steel strand along the axis of the steel strand in the process of clamping and tensioning the steel strand by the clamping body, so that the steel strand cannot be damaged by the clamping body; in addition, the clamping body of the technical scheme can be used for anchoring the steel strand at any position, for example: in beam-end anchorages or in cable tower-end anchorages (steel strands between anchorages at both ends).

This technical scheme's concrete centre gripping process does, adopts the holding body centre gripping steel strand wires, makes the heliciform recess of the protruding embedding holding body hole of heliciform of steel strand wires surface, installs the holding body to the taper hole of ground tackle in again, makes holding body surface and taper hole tight fit, and last tensioning steel strand wires, the holding body surface after the tight fit is great with the frictional force of taper hole internal surface, can restrict tensioning in-process steel strand wires and drive the holding body and rotate, reaches the steel strand wires and draws tight effect more.

The further technical scheme is that the taper angle of the outer surface of the clamping body is 6-8 degrees.

The further technical proposal is that the length of the clamping body is 30 mm-40 mm.

A steel strand anchoring structure comprises an anchorage device with a taper hole and the clamping body.

The further technical proposal is that the inner surface of the taper hole and the outer surface of the clamping body are provided with matched rotation stopping structures. The anchoring structure with the rotation stopping structure in the technical scheme can be suitable for steel strand anchoring construction with larger prestress, and the safety performance of the bridge is further guaranteed.

The further technical proposal is that the rotation stopping structure is a strip-shaped bulge and a strip-shaped groove which are matched with each other.

The utility model has the advantages that:

the utility model provides a clamping body and steel strand wires anchor structure for anchoring steel strand wires, through adopting the clamping body that has the hole and has the heliciform recess to press from both sides tight steel strand wires, make the heliciform arch of steel strand wires surface cooperate with the heliciform recess of clamping body, and this heliciform recess internal surface is the smooth structure of no thread tooth, no arch, therefore, in the clamping body presss from both sides tight steel strand wires, the tensile steel strand wires process, the clamping body can not harm the steel strand wires; in addition, the clamping body can be anchored at any position of the steel strand; and the rotation of the clamping body in the taper hole is further limited through the rotation stopping structure, so that the safety performance of the bridge is improved.

Drawings

FIG. 1 is a diagram: a schematic structure diagram for the clamping body of anchor steel strand wires.

FIG. 2 is a diagram of: the first sub-clamping piece structure schematic diagram.

FIG. 3 is a diagram of: schematic diagram of steel strand wires anchor structure.

In the figure:

1. a clamping body; 11. a first sub-clip; 12. a second sub-clip; 101. a first groove; 102. a second groove; 103. a third groove; 2. an anchorage device; 20. a taper hole; 3. steel strand wires; 31. a first steel wire; 32. a second steel wire; 33. and a third steel wire.

Detailed Description

The present invention will be described in detail with reference to the embodiments shown in fig. 1 to 3, and features of the following embodiments and examples may be combined with each other without conflict.

The present embodiment provides a clamping body for anchoring a steel strand, as shown in fig. 1 and 2, the clamping body 1 is composed of a first sub-clamping piece 11 and a second sub-clamping piece 12; the outer surface of the clamping body 1 is a conical surface, the inner hole of the clamping body 1 is provided with a spiral groove, the spiral groove is used for being matched with a spiral protrusion on the outer surface of the steel strand 3, and the inner surface of the spiral groove is of a smooth structure; specifically, in this embodiment, a steel strand of 7 steel wires is taken as an example, wherein 6 steel wires are wound outside a central steel wire in a spiral manner around the periphery of the steel strand 3, and each spiral groove includes a first groove 101, a second groove 102, a third groove 103, a fourth groove, a fifth groove and a sixth groove which are arranged in a spiral manner, and are respectively matched with a first steel wire 31, a second steel wire 32, a third steel wire 33, a fourth steel wire, a fifth steel wire and a sixth steel wire at the periphery of the steel strand 3, that is, a steel wire unit at the periphery of the steel strand 3 is embedded into a corresponding groove;

in the embodiment, the steel strand 3 is clamped by the clamping body 1 with the inner hole provided with the spiral groove, each steel wire unit on the periphery of the steel strand 3 is matched with the corresponding groove, the inner surface of each groove is a smooth curved surface with structures without threads, protrusions and the like, and the spiral groove is used for limiting the movement of the steel strand 3 along the axis in the process of clamping the steel strand 3 by the clamping body 1 and tensioning the steel strand 3, so that the steel strand 3 cannot be damaged by the clamping body 1; furthermore, the clamping body 1 can be anchored at any position of the steel strand 3, for example: in beam-end anchorages or in cable tower-end anchorages (steel strands between anchorages at both ends).

The above embodiment exemplarily shows specific structures of the steel strand 3 and the helical groove, and in other embodiments and practical applications, the helical groove of the inner hole of the clamping body 1 may be prepared according to the specific number of the steel wire units and the twist angle of the steel strand 3, for example, the steel strand 3 may also be supported by 2, 3, or 19 steel wire units, and the clamping body 1 prepares 2, 3, or 19 grooves of the inner hole according to the specific number of the steel wire units and the twist angle of the steel strand 3, and respectively cooperates with the steel wire units; in addition, the number of the sub-clamping pieces of the clamping body 1 can be 3 or more, specifically, the clamping body 1 is formed by splicing the sub-clamping pieces, and a gap is reserved between the adjacent sub-clamping pieces, namely, the outer diameter of the steel strand 3 is larger than the inner diameter of the inner hole of the clamping body 1.

In another embodiment, in addition to the above-mentioned embodiments, the taper angle of the outer surface of the clamping body 1 is 7 °, and in other embodiments or practical applications, the taper angle may be between 6 ° and 8 °, and the anchor efficiency coefficient in the taper angle range is good, and the anchor is also easy to be removed.

In another embodiment, on the basis of the above embodiment, the length of the clamping body 1 is 31mm, in other embodiments or practical applications, the length thereof may also be in a range of 30mm to 40mm, and specifically may be determined according to practical engineering applications and mechanics calculation results, without being limited thereto, and the anchoring efficiency coefficient of the clamping body 1 in the length range may reach about 70% of the breaking force of the steel strand 3, and the anchoring effect is good.

In another embodiment, as shown in fig. 3, there is provided a steel strand anchoring structure, including an anchor 2 having a tapered hole 20, and the clamping body 1 of the above embodiment; the specific anchoring process is that firstly, the clamping body 1 is adopted to clamp the steel strand 3, the spiral protrusion (namely each steel wire unit) on the outer surface of the steel strand 3 is embedded into the spiral groove of the inner hole of the clamping body 1, then the clamping body 1 is installed into the taper hole 20 of the anchorage device 2, the outer surface of the clamping body 1 is tightly matched with the taper hole 20, finally, the steel strand 3 is tensioned, the friction force between the outer surface of the clamping body 1 after tight matching and the inner surface of the taper hole 20 is large, the steel strand 3 can be limited to drive the clamping body 1 to rotate in the tensioning process, and the effect that the steel strand 3 is tensioned more and more is tensioned is achieved; the anchoring structure of the embodiment can be used for beam-end anchors and cable tower end anchors among beam-end anchors.

In another embodiment, on the basis of the above embodiment, the inner surface of the taper hole 20 and the outer surface of the clamping body 1 are provided with matched rotation stopping structures; specifically, the strip-shaped bulges are arranged on the inner surface of the taper hole 20, and the strip-shaped grooves are arranged on the outer surface of the clamping body 1, and the strip-shaped bulges and the strip-shaped grooves are respectively arranged along the arrangement direction of the steel stranded wires 3;

the anchoring structure with the rotation stopping structure in the embodiment can be suitable for anchoring construction of the steel strand 3 with larger prestress, and further ensures the safety performance of the bridge; in other embodiments or practical uses, the strip-shaped protrusions and the strip-shaped grooves may also be respectively arranged on the outer surface of the clamping body 1 and the inner surface of the taper hole 20; or the strip-shaped bulges and the strip-shaped grooves can also be inclined along the same angle to form a layout structure with an included angle with the horizontal direction, so that the effect of rotation stopping can be realized; the rotation stopping structure can also adopt other shapes of matched bulges and grooves, which are not listed here.

The utility model provides a clamping body and steel strand wires anchor structure for anchoring steel strand wires, through adopting the clamping body 1 that has the hole and has the heliciform recess to press from both sides tight steel strand wires 3, make the heliciform arch of the outer surface of steel strand wires 3 cooperate with the heliciform recess of the clamping body 1, and the inner surface of the heliciform recess is the smooth structure of no thread tooth, no arch, therefore, in the clamping body 1 is pressing from both sides tight steel strand wires 3, is stretched and is drawn steel strand wires 3 processes, the clamping body 1 can not damage steel strand wires 3; in addition, the clamping body 1 can be anchored at any position of the steel strand 3; and the rotation of the clamping body 1 in the taper hole 20 is further limited through the rotation stopping structure, so that the safety performance of the bridge is improved.

Claims (6)

1. The clamping body for anchoring the steel strand is characterized in that the clamping body (1) consists of more than two sub-clamping pieces; the surface of the clamping body (1) is a conical surface, the inner hole of the clamping body (1) is provided with a spiral groove, the spiral groove is matched with the spiral protrusion on the outer surface of the steel strand (3), and the inner surface of the spiral groove is of a smooth structure.

2. The clamping body for anchoring a steel strand as claimed in claim 1, characterized in that the cone angle of the outer surface of the clamping body (1) is between 6 ° and 8 °.

3. The clamping body for anchoring a steel strand as claimed in claim 1, characterized in that the length of the clamping body (1) is between 30mm and 40 mm.

4. A steel strand anchoring structure, comprising an anchorage (2) with a conical bore (20) and a clamping body (1) according to any one of claims 1 to 3.

5. The steel strand anchoring structure as claimed in claim 4, wherein the inner surface of the tapered bore (20) and the outer surface of the clamping body (1) are provided with cooperating anti-rotation structures.

6. The steel strand anchoring structure of claim 5, wherein the rotation stopping structure is a mating strip-shaped protrusion and strip-shaped groove.

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