CN210459770U

CN210459770U - Prestressed steel wire

Info

Publication number: CN210459770U
Application number: CN201921140099.XU
Authority: CN
Inventors: 付崇建; 孙大勇; 郭振东; 孙元增
Original assignee: Liaocheng Xindadi Energy Saving Material Technology Co ltd
Current assignee: Shandong Xindadi Holding Group Co ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-05-05
Anticipated expiration: 2029-07-19

Abstract

The utility model provides a prestressed wire, which comprises a steel wire body, the surface of steel wire body is provided with double-end helical structure's protruding muscle, the first protruding muscle of protruding muscle and the protruding muscle of second are central symmetry about the steel wire body, the surface of steel wire body is provided with a plurality of grooving, the projection shape of grooving is oval and major axis direction the same with the axial of steel wire body, the tank bottom surface of grooving is the cambered surface sunken to steel wire body axis, the pitch of first protruding muscle or the protruding muscle of second is greater than the sum of the major axis of two grooving at least, the surface of first protruding muscle and the protruding muscle of second is provided with a plurality of impressed watermark along spiral direction separately, the steel wire body, the surface of protruding muscle and grooving is provided with the galvanizing coat, the skin on galvanizing coat is provided with the epoxy protective layer. The utility model discloses utilize first protruding muscle and the protruding muscle of second can improve the intensity of prestressed wire, and the cut groove can make the steel wire body have great bond stress, reasonable in design, simple structure moreover, and life is longer, is fit for extensive the popularization.

Description

Prestressed steel wire

Technical Field

The utility model belongs to the technical field of the building steel, especially, relate to a prestressed wire.

Background

The prestressed steel wire is a steel wire which is processed by carbon steel wires and is applied to a prestressed concrete structure or a prestressed steel structure, and the prestressed spiral rib steel wire is a steel wire which is classified according to the surface form of the prestressed steel wire.

The existing prestressed steel wire is provided with a single spiral convex rib on the surface, so that the strength is improved, but the application is limited; moreover, the bond strength of the steel wire is small, the bonding degree of the steel wire and concrete can be influenced when the steel wire is applied to a concrete reinforcing structure, the quality and the service life of a prestressed concrete member are limited, and the steel wire is easy to slide when being applied to a multi-strand steel wire bundle, so that the use effect of the steel wire bundle is reduced; in the aspect of maintenance, the method for solving the corrosion resistance of the steel wire is to coat a layer of epoxy resin on the surface of the steel wire, wherein the epoxy resin layer has a certain protection effect on the steel wire and has the functions of corrosion resistance and oxidation resistance. However, the epoxy resin is soft, and the epoxy resin can be scratched to expose the steel wire when being impacted by a sharp object, so that the steel wire at the position loses the corrosion resistance, and the service life of the steel wire is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem that above-mentioned prestressed wire exists, provide a reasonable in design, simple structure, intensity height, the big and longer prestressed wire of life of bond stress.

In order to achieve the above object, the present invention adopts the technical solution that the prestressed steel wire comprises a steel wire body, wherein the surface of the steel wire body is provided with a convex rib, the convex rib is of a double-end spiral structure and comprises a first convex rib and a second convex rib, the first convex rib and the second convex rib are in central symmetry with respect to the steel wire body, the surface of the steel wire body is radially provided with notches distributed in four orthogonal directions, the notches are distributed on the surface of the steel wire body, the projection shape of the notch is elliptical and the major axis direction is the same as the axial direction of the steel wire body, the bottom surface of the notch is a cambered surface recessed towards the axis of the steel wire body, the pitch of the first convex rib or the second convex rib is at least greater than the sum of the major axes of the two notches, the surfaces of the first convex rib and the second convex rib are provided with a plurality of embossings along the respective spiral directions, the surface of the steel wire body, the convex ribs and the notch grooves is provided with a zinc coating, and the outer layer of the zinc coating is provided with an epoxy protective layer.

Preferably, the width of the first rib and the second rib is 1.5 mm.

Preferably, the nominal diameter of the first convex rib and the nominal diameter of the second convex rib are 1.2-1.5 times of the diameter of the steel wire body.

Preferably, the maximum depth of the notch is 0.3 mm.

Preferably, the direction of the connecting line at the two ends of the emboss intersects with the spiral direction of the surface on which the emboss is arranged.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

the utility model provides a pair of prestressed wire utilizes first protruding muscle and the protruding muscle of second can improve prestressed wire's intensity, and the cut groove can make the steel wire body have great bond stress, reasonable in design, simple structure moreover, and life is longer, is fit for extensive the popularization.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a prestressed steel wire according to an embodiment;

in the above figures, 1, a steel wire body; 2. a first rib; 3. a second rib; 4. grooving; 5. and (6) embossing.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" used herein refer to the same directions as the drawings, and do not limit the structure.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations of the specific embodiments of the present disclosure.

Embodiment, as shown in fig. 1, the utility model provides a pair of prestressed wire, including the steel wire body, the surface of steel wire body 1 is provided with protruding muscle. This device improves the structural style of protruding muscle, and protruding muscle like in this device is double-end helical structure and includes first protruding muscle 2 and the protruding muscle 3 of second, and first protruding muscle 2 and the protruding muscle 3 of second are central symmetry about the steel wire body. Except that the quantity increase of protruding muscle be two, still set two protruding muscle into double-end helicla configuration, bending strength and shear strength increase, and the pulling force distributes more evenly on unit cross sectional area moreover, can further improve tensile strength.

Further, the utility model discloses radially being provided with the grooving 4 that distributes in four quadrature position on steel wire body 1's surface, grooving 4 distributes on steel wire body 1's surface has a plurality of, the projection shape of grooving 4 is oval and major axis direction the same with the axial of steel wire body, the tank bottom surface of grooving 4 is the cambered surface sunken to steel wire body axis, the pitch of first protruding muscle 2 or the protruding muscle 3 of second is greater than the major axis sum of two grooving 4 at least, simultaneously, be provided with a plurality of impressed watermark 5 along spiral direction separately on the surface of first protruding muscle 2 and the protruding muscle 3 of second. Through set up grooving 4 and impressed watermark 5 on single steel wire body, can be applied to the steel strand wires field, twist the steel strand wires that system formed like many this devices, effective frictional force between the steel wire is great, is difficult for producing at adjacent steel wire core silk limit portion and slides and contract back, is favorable to increasing the bond stress of steel strand wires and concrete, and then can obtain the concrete structure that the quality is higher. Moreover, the notch groove is oval, the bottom surface is an arc surface, the direction of bearing stress shows anisotropy, and although a certain section with concentrated stress exists, the improvement degree of the overall quality and the use effect of the steel strand is more obvious and considerable compared with the steel strand.

In order to effectively prolong the service life of the device, a zinc coating is arranged on the surfaces of the steel wire body 1, the convex ribs and the notch grooves 4, and an epoxy protective layer is arranged on the outer layer of the zinc coating. Plating a zinc coating on the surfaces of the steel wire body 1, the convex ribs and the notches 4 by a chemical method (hot dipping); and then coating a layer of epoxy resin coating on the periphery of the surface of the zinc coating by a physical method (spraying). Wherein, the galvanizing coat has fine protection anti-oxidant function to the steel wire, and epoxy layer has further protected the steel wire in addition, prevents to corrode, and dual guard action makes the corrosion resisting property of steel wire stronger, and life is longer.

The diameter of the section of the steel wire body is usually within the range of 1.5-8 mm. In order to improve the additional strengthening of protruding muscle, the utility model provides a first protruding muscle 2 and the nominal diameter of the protruding muscle 3 of second are 1.2 ~ 1.5 times of steel wire body diameter, the producibility degree of difficulty can be reduced on the one hand, comparatively stable high strength characteristic can be guaranteed to on the other hand, and the width of the protruding muscle 3 of first protruding muscle 2 and second is 1.5mm, improve the anti deformability of the protruding muscle 3 of first protruding muscle 2 and second, be certain proportion interval distribution with grooving 4 moreover, can improve the comprehensive adaptability of steel wire.

In order to improve the structural strength of single steel wire body, the utility model discloses the maximum depth degree of the notch groove 4 that sets up is 0.3mm, and the edge depth degree of notch groove 4 is more shallow, has guaranteed simultaneously that the steel wire body is at structural strength and two upward performances of bond wrap force.

Further, the utility model provides a direction of the 5 both ends lines of impressed watermark is crossing rather than the spiral direction on place surface, is favorable to the quality of the steel strand wires of twisting into of many root devices.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims

1. A prestressed steel wire comprises a steel wire body, wherein convex ribs are arranged on the surface of the steel wire body, and the prestressed steel wire is characterized in that the convex ribs are of a double-end spiral structure and comprise a first convex rib and a second convex rib, the first convex rib and the second convex rib are in central symmetry about the steel wire body, the surface of the steel wire body is radially provided with notches distributed in four orthogonal directions, a plurality of notches are distributed on the surface of the steel wire body, the projection shape of each notch is oval, the major axis direction of each notch is the same as the axial direction of the steel wire body, the groove bottom surface of each notch is a cambered surface sunken towards the axis of the steel wire body, the thread pitch of the first convex rib or the second convex rib is at least larger than the sum of the major axes of the two notches, a plurality of embossed grains are arranged on the surfaces of the first convex rib and the second convex rib along the respective spiral directions, and zinc-plated layers are arranged on the surfaces of the steel wire body, and an epoxy protective layer is arranged on the outer layer of the zinc coating.

2. The prestressed wire of claim 1, wherein said first and second ribs have a width of 1.5 mm.

3. The prestressed steel wire as claimed in claim 2, wherein the nominal diameter of said first and second ribs is 1.2-1.5 times the diameter of the steel wire body.

4. A prestressed wire according to claim 3, wherein said grooves have a maximum depth of 0.3 mm.

5. The prestressed wire of claim 4, wherein the direction of the connecting line between the ends of said embossments intersects the direction of the helix of the surface on which said embossments are placed.