KR0141478B1 - Tensile bundle consisting of a number of tension members such as strand wire, round bar or ordinary wire - Google Patents

Abstract

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Description

Extension bundles consisting of a number of tension members such as stranded wire, round bar or ordinary wire

1 is a cross-sectional view of a strand wire bundle consisting of stranded wire coated with each plastic in conventional form.

2 and 3 are cross-sectional views of further embodiments of the means according to the invention.

4 to 9 are cross-sectional views of further embodiments of the means according to the invention.

Figure 10 is a cross-sectional view showing an embodiment of one end of the bundle having a fixing means.

* Explanation of symbols for main parts of the drawings

1, 1: stranded wire 2, 3, 5: cladding

4: sealing material 7: web

8: Settlement means

The present invention relates to a tension bundle composed of a plurality of tension members, such as strand wire, round bar or ordinary wire. The invention also relates to a method of making such a bundle. In the conventional production of the extended bundles, strand wires or ordinary wires have been individually wrapped with synthetic resin such as polyethylene, coated with grease or electroplated, and then a plurality of stranded wires or ordinary wires have been bundled. Also known are methods of electroplating or lubricating strand wires before coating with synthetic resin. Such strand wires or ordinary wires can be laid in a plastic cladding. The defect that occurs when the strand wire or the general wire coated with the synthetic resin is bundled is that a relatively thick bundle is made. In addition, the tension members, which consist of round rods, ordinary or stranded wires, whether individually or in bundles, are transported in sealing tubes made of sheet metal or synthetic resin, and the space between the tension members and the sealing tubes is either cement or so-called permanent plastic material. Is filled into the space before or after the tensioning of the tensioning material. The tension member is provided with a fixing means and is subjected to a tension force at an end thereof. They may be housed inside or outside the support structure, in which case the seal tube should be made of a corrosion resistant material. A deficiency of the known method has been to prevent corrosion, which is necessary for the performance of the process and therefore takes a lot of time and expense. In addition, the risk of failure to protect the tension members was not negligible. Also mentioned are bonds resulting from round bars, ordinary wires or stranded wires contacting in the flexural zone of the tension member which will increase friction during towing and result in a loss of towing tension as well as a reduction in strength, in particular fatigue strength. Accordingly, the present invention has been made to solve the above-mentioned defects, and it is an object of the present invention to provide a means for minimizing the space for tensile bundles and reducing labor in manufacturing a conventional tensile bundle. In order to achieve this object, in the present invention, the tension members in the bundle are parallel to each other and commonly covered with synthetic resin. In the case of cables for electrical installations, a method of sealing various insulated wires with a synthetic resin is known. Since these cables are not used for reinforced concrete, the wires in the cables are not parallel but connected in a crimped state. According to another feature of the invention, the strand wire or ordinary wire is preferably coated with anti-corrosion and / or lubricating material, ie grease and / or electroplating and / or competitive resin thin film, in the extruder before the coating is carried out. do. When coated with a resin, the stranded wire or plain wire is placed in such a way that the bundle is compressed to allow the resin to penetrate between the stranded wire or the plain wire and then to obtain the desired small diameter. In such a situation, the coating may not be carried out exactly over the desired surface contour. In order to alleviate this risk, in the present invention, secondary coating of the synthetic resin is performed. Since this coating can be uniformly bonded to the primary coating, a complete coating is formed. According to another feature of the invention, it is also possible to produce secondary coatings of synthetic resins other than the primary coating. Due to such a bundle, problems related to the characteristics in bending and rolling arise. The use of harder synthetic resin and thick, thicker resins, respectively, where stronger protection of the strand wires by the cladding is required, resulting in excessive loading or damage to the cladding due to excessive bending. It cannot be rolled to the desired small dimension. It is therefore a further object of the present invention to provide a means for providing a sufficiently protective coating which can be rolled to a tensile bundle with sufficiently small dimensions. In order to solve this problem, by another feature according to the present invention, an inner covering made of synthetic resin soft to strand wire or common wire and an outer covering made of harder synthetic resin can be provided.

Within the scope of the present invention, a plurality of concentric coverings of synthetic resin may be provided on strand wires or ordinary wires, and a lubrication layer may be provided between at least two coverings so that a bundle with an inner covering may be provided to the outer covering material in the tensioning filling. I can move it. The coating and, but not necessarily, the lubricating layer are applied by a continuous extruder. In buildings where several strand wires are to be placed side by side, the strand wires preferably coated with soft synthetic resin are preferably joined in the form of a tape. In conclusion, it is an object of the present invention to eliminate the above deficiencies of known methods. This object is achieved by the tension bundle according to the invention in which round bars, ordinary wires or strand wires are tensioned individually or in common. It is achieved by the tensile bundle according to the present invention. An embodiment of the tensile bundle according to the present invention is described in more detail based on the accompanying drawings. In the figures, in the case of FIGS. 1 to 3 and 5 to 9, only one strand wire is shown, and the other strand wire is simply indicated by a circle. A conventional strand wire bundle is shown in FIG. This bundle consists of individual strand wires 1 each provided with a synthetic resin coating 2 separately. In the example shown, six strand wires 1 are arranged around the center strand wire 1 'in parallel with each other. Such strand wire bundles must occupy a relatively large space due to the cladding 2 applied separately on each strand wire 1, 1 ′ when used as a towed strand wire bundle. The bundle shown in cross-sectional view in FIG. 2 has strand wires arranged in parallel with each other according to the present invention, and is made of an extruder for injecting synthetic resin 3 into the space between the strand wires 1 and coating the same. It is totally coated with synthetic resin. The strand wire may be dried before it is coated with a soft synthetic resin. However, as illustrated, it is also possible to accommodate a cladding 4 composed of grease, hard synthetic resin, or applied as a dissimilar metal alloy to act as a corrosion resistant material. This cladding, if made of grease, may also completely fill the inner spaces between the tension members. 2 shows a single wrapped strand wire arranged around a central strand wire. However, you can wrap any amount of overlap against each other. In FIG. 3, the bundle of stranded strand wires 1 arranged in parallel is wrapped in a double layer covering of two concentric coverings 3 and 5. It is preferable to coat in two stages by two extruders. In this case, it is preferable to first fill the space between the strand wires 1 in such a way that the distance of the strand wire is larger in the final step, whereby the resin is injected into the space between the inner strand wires and the strand wire is wrapped around it and then covered. It is compressed to obtain the minimum diameter of the bundle. In the second step, the outer synthetic resin coating material 5 is applied to form a round coated bundle. Both synthetic resins may be arbitrarily selected depending on the desired properties of the coated bundle. Therefore, it is possible to use the coating material made of the same synthetic resin or the inner coating material 3 made of synthetic resin that is softer than the outer coating material 5. This process is preferably carried out by successive extrusion of a series of two extruders. It is natural that the inner cladding may be made of a synthetic resin that is harder than the outer cladding within the scope of the present invention. According to another feature of the present invention, since the lubricant may be included between the two coatings 3, 5 or between the outer coating 5 and another concentric covering, the bundle having the inner covering during the tensioning of the bundle is the outer covering. You can move about. Coatings of this kind may also be used in the extrusion process. However, it is often necessary to store several strand wires arranged side by side. In this case, the strand wire 1 may be sealed by the sealing material 4 or may be joined by a tape arranged side by side by the synthetic resin 3. The tape consists of two strand wires in FIG. 4 and the four strand wires in FIGS. 5-6, and the tape with the covering of FIG. 6 differs from that in FIG. In the embodiment according to FIGS. 4 to 6, the strand wires 1 are separated from each other by the longitudinal web 7 of the cladding. However, it is also possible to arrange the strand wires in intimate contact with each other such that the web 7 cannot be applied. As shown in Figs. 7 to 9, there is also a method in which the strand wires are arranged in parallel with different configurations of cross-sections of the strand wire bundles. Within the scope of the present invention, there are no restrictions on the number of lubricating oil coatings between each of the two coatings as well as the number and cross-sectional shape of the overlapping coatings. This allows the appearance of the bundle to be arbitrarily designed and accommodated in a space-saving manner within the building structure and along its exterior walls. Instead of stranded wire, stranded wires may also be formed in bundles within the scope of the present invention, and such stranded wires may be coated with electroplating or grease or thin, hard synthetic resins before coating with soft synthetic resins. For the purpose of fixing, the synthetic resin coating at the end of the bundle thus obtained is removed, and the surface of the strand wire is washed clean so that it can be joined by concrete, casting or clamping.

In order to anchor the strand wires, the ends of the bundles may be opened separately as shown in FIG. 10, and fixing means 8 may be provided in the tension member at each strand wire end. It is also possible to fix both ends in a joint fixing plate. In this case a bundle consisting of two strand wires is shown, but a bundle consisting of two or more strand wires may be separated into individual members in the same manner. The bundle according to the present invention is used, for example, for towing of a support structure for receiving the bundle as an oblique cable in the ground fixing or suspension bridge, etc., externally or internally. In particular, it also has the feature that various applications are possible.

Claims (10)

A tension bundle composed of a plurality of tension members, such as strand wire, round bar, or general wire, characterized in that the tension members are parallel to each other and are entirely covered with a synthetic resin coating material, and the coating material is randomly injected between the tension members. The tensile bundle according to claim 1, wherein the tensile material is coated with a soft synthetic resin such as polyethylene. The tensile bundle of claim 1 wherein the tensile member is individually coated with grease. The tension bundle of claim 1 wherein the tension members are individually electroplated. The tension bundle according to claim 1, wherein the tension members are individually coated with a rigid synthetic resin. A bundle according to claim 1, wherein the cladding between the tension members is formed of a connecting web. The tensile bundle according to any one of the preceding claims wherein the tensile material is covered with a plurality of overlapping synthetic resin coatings. 8. An extension bundle according to claim 7, wherein an inner covering of synthetic resin soft to the tension member and an outer covering of harder synthetic resin are provided. 8. An extension bundle according to claim 7, wherein a lubrication layer is provided between at least two coatings. A method of tensioning a tension bundle according to claim 1, characterized in that the tension members are individually or wholly tensioned.

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