CN202308982U - Tension wire clamp used for optical phase conductor - Google Patents

Abstract

The utility model relates to a strain-resistant clamp used for optical fiber composite overhead phase wires. The strain-resistant clamp includes inner twisted wires, outer twisted wires, heart-shaped extension rings, bowl head hanging plates, insulator strings, and ball head hanging rings. And UL-type hanging board; wherein, the inner twisted wire and the outer twisted wire form a double-layer pre-twisted wire structure, and the inner twisted wire is covered outside the optical fiber composite overhead phase line; the outer twisted wire is divided into two groups, which are jointly coated with the inner twisted wire Outside the wire, two sets of outer twisted wires are connected from one end to the heart-shaped extension ring; one end of the heart-shaped extension ring is connected to the outer twisted wire, and the other end is connected to the bowl head hanging plate, insulator string, ball hanging ring and UL type hanging plate in turn; The insulator string consists of several insulators connected in series; finally, the strain clamp is connected to the tower by a UL type hanging plate. The utility model provides a tension-resistant clamp for optical fiber composite overhead phase line, which is used to fasten the optical fiber composite overhead phase line optical cable on the pole tower. It has high strength, corrosion resistance, strong versatility, simple installation, and easy quality assurance. The advantages.

Description

A strain clamp for optical fiber composite overhead phase line

technical field

The utility model relates to a matching clamp for optical fiber composite overhead phase line (OPPC), in particular to a strain-resistant clamp for optical fiber composite overhead phase line.

Background technique

Tension clamps are the key hardware for erecting optical cables. They are generally used to fix conductors or lightning conductors on the tension insulator strings of non-linear towers for anchoring. They can also be used to fix the stay wires of stay towers.

The general technical conditions of strain clamps are as follows:

The tension clamp used in the substation should hold no less than 65% of the rated tensile strength of the connected wire;

The radius of curvature of the bolt-type tension clamp should not be less than 8 times the diameter of the installed wire;

Both the outlet of the clamp and the connection outlet should be made into a smooth bell mouth shape;

As a conductor clamp, when the rated voltage passes the maximum allowable current for a long time, the temperature rise of the clamp should not be greater than the temperature rise of the installed wire;

The resistance of the clamp should not be greater than 1.1 times the resistance of the installed equal-length wire;

When the wire clip bears the electrical load, its ampacity should not be less than the ampacity of the wire to be installed. the

According to different structures and installation conditions, strain clamps can be roughly divided into two categories:

The first category: the tension clamp should bear 90% of the rated tensile force of the conductor or lightning conductor, but it should not be used as a conductor. This type of clamp can be removed after the wire is installed and used separately. Such clamps include bolt-type strain clamps, wedge-shaped clamps and compression-type strain clamps.

Among them, the working principle and characteristics of the compression type strain clamp are as follows:

The compression type strain clamp is composed of an aluminum tube and a steel anchor. The steel anchor is used to connect and anchor the steel core of the steel-cored aluminum stranded wire, and then put on the aluminum tube body, and the metal is plastically deformed by pressure, so that the clamp and The wires are bonded as a whole. According to the commonly used structural form, the steel anchor of the wire clamp bears all the pressure of the wire, so its mechanical strength matches the rated tensile force of the wire.

Compression type strain clamps can be installed hydraulically or by explosive pressure. When hydraulic pressure is used, a steel mold of a certain specification must be used for compression with a hydraulic press. The finalized compression type strain clamp, regardless of steel pipe or aluminum pipe, is circular, and after compression, it becomes a regular hexagon, and the opposite side of the hexagon is 0.866 times the outer diameter of the pipe.

The characteristics of the bolt-type strain clamp are: the clamp body is made of high-strength aluminum alloy; the appearance is smooth and clean, and the service life is long; it is easy to install and use; there is no power loss, and it is an energy-saving certified product.

Generally, the grip force of the bolt-type tension clamp is 90% of the rated tensile force of the wire; for the strain clamp used for extra-large cross-sectional area wires, expanded diameter wires and insulated wires, the grip strength can be 65%.

The second category: tension clamps are used as conductors in addition to bearing all the tension of conductors or lightning conductors. Therefore, once this type of wire clip is installed, it cannot be disassembled, also known as dead wire clip. Because it is a conductor, the installation of the clamp must be carefully carried out in accordance with the relevant installation operating procedures.

The defect of existing strain clamps applied to OPPC is mainly stress concentration. Whether it is a bolt type or a crimp type strain clamp, the tension of the wires in the entire span section is concentrated on the tension clamp. , it is easy to cause damage to the light unit in the wire.

Utility model content

The purpose of this utility model is to provide a tension-resistant clamp for optical fiber composite overhead phase line (OPPC), which is used to fasten the OPPC optical cable on the pole tower, can withstand greater tension, and has greater impact on the OPPC optical cable. The holding force, and can not exceed the lateral pressure strength of the cable.

In order to achieve the above purpose, the utility model provides a tension clamp for optical fiber composite overhead phase line. Ball link and UL type hanging plate. Among them, the inner twisted wire and the outer twisted wire form a double-layer pre-twisted wire structure, and there is an extra pre-twisted length at both ends of the structure, and the inner twisted wire is wrapped outside the optical fiber composite overhead phase line; the outer twisted wire is divided into two groups , together covering the inner twisted wires, wherein two sets of outer twisted wires are connected to the heart-shaped extension ring from one end; one end of the heart-shaped extension ring is connected to the outer twisted wires, and the other end is connected to the bowl head hanging plate; the two sets of insulator strings The two ends are respectively connected with the other end of the bowl head hanging plate and the ball hanging ring; the other end of the ball hanging ring is connected with the UL type hanging plate, and the other end of the UL type hanging plate is connected with the pole tower. That is, one end of the heart-shaped extension ring is connected to the outer twisted wire, and the other end is respectively connected to the bowl-head hanging plate, insulator string, ball-end hanging ring and UL-type hanging plate in turn, and the UL-shaped hanging plate connects the strain clamp to the pole tower .

The above-mentioned strain clamp for optical fiber composite overhead phase wire, wherein the inner twisted wire is aluminum-clad steel wire, generally aluminum-clad steel wire of φ2.5; the inner twisted wire and optical fiber composite overhead phase wire The contacted inner surface is sprayed with dense conductive sand, the particle diameter ranges from 0.1mm to 0.2mm, and the size is different. On the one hand, the conductive sand can increase the friction between the pre-twisted wire and OPPC to achieve the maximum grip. On the one hand, it can increase the electrical conductivity of the tension clamp.

The above-mentioned strain clamp for optical fiber composite overhead phase line, wherein the outer twisted wires are aluminum-clad steel wires such as φ3.5, φ4.0, and φ4.8, and each group of outer twisted wires is composed of several aluminum-clad It is made of bonded steel wires, and the specific number is determined according to the distance between the forming holes, usually 6 or 7.

In the above-mentioned strain clamp for optical fiber composite overhead phase line, the insulator string includes several insulators connected in series.

The above-mentioned tension clamp for optical fiber composite overhead phase line, wherein, the connection parts of the tension clamp include a heart-shaped extension ring, a bowl hanging plate, a ball hanging ring and a UL type hanging plate; The connecting parts are made of hot-dip galvanized stainless steel.

The above-mentioned strain clamp for the optical fiber composite overhead phase wire, wherein, the other end of the UL-type hanging plate fastens the optical fiber composite overhead phase wire to the tower through bolts and nuts.

The above-mentioned strain clamp for the optical fiber composite overhead phase line, wherein, the holding force of the said tension clamp is greater than or equal to 90% of the rated tensile strength (RTS) of the optical fiber composite overhead phase line.

The utility model has the following advantages:

High strength: The tension clamps used for optical fiber composite overhead phase lines have an extra pre-twisted length, so as to ensure that the tensile strength can reach more than 95% of the rated tensile strength of OPPC.

Corrosion resistance: the material is consistent with the wire, thus ensuring strong corrosion resistance.

Simple installation and guaranteed quality: the wire clip can be installed quickly and easily on site by hand, without any special tools, and one person can complete the operation; at the same time, the installation quality is easy to guarantee, strong consistency, convenient inspection, and the appearance is simple and beautiful.

Strong versatility: the utility model can be matched with various wire clamps.

Description of drawings

Fig. 1 is a structural schematic diagram of the tension clamp of the optical fiber composite overhead phase line provided by the utility model. the

Detailed ways

The specific embodiment of the utility model will be further described below in conjunction with the accompanying drawings.

Referring to Fig. 1, the tension clamp for optical fiber composite overhead phase line 1 provided by the utility model includes inner twisted wire 2, outer twisted wire 3, heart-shaped extension ring 4, bowl head hanging plate 5, insulator string 6. Ball-end hanging ring 7 and UL-type hanging plate 8. Among them, the inner twisted wire 2 and the outer twisted wire 3 form a double-layer pre-twisted wire structure, and there is an extra pre-twisted length at both ends of the structure, and the inner twisted wire 2 is coated and pre-twisted outside the optical fiber composite overhead phase line 1; The skeined wires 3 are divided into two groups, which are pre-twisted inside the skeined wires 2. The two groups of outer skeined wires 3 are connected to the heart-shaped extension ring 4 from one end; the heart-shaped extension ring 4 is connected to the outer skeined wire 3 at one end, The other end is connected with the bowl hanging plate 5; the two ends of the insulator string 6 are respectively connected with the bowl hanging plate 5 and the ball hanging ring 7, and the insulator string 6 includes several insulators 61 connected in series; the other end of the ball hanging ring 7 One end is connected with the UL type hanging board 8, and the other end of the UL type hanging board 8 is connected with the pole tower. That is, one end of the heart-shaped extension ring 4 is connected to the outer twisted wire 3, and the other end is respectively connected to the bowl head hanging plate 5, the insulator string 6, the ball end hanging ring 7 and the UL type hanging plate 8, and finally the UL type hanging plate 8 will Zhang Jinju is connected with the tower.

The inner twisted wire 2 generally adopts aluminum-clad steel wire of φ2.5. The inner surface of the inner twisted wire 2 in contact with the optical fiber composite overhead phase line 1 is sprayed with dense conductive sand, and its particle diameter ranges from 0.1mm to 0.2mm, and the size is different. The friction between the optical fiber composite overhead phase wires 1 achieves the maximum grip force, and on the other hand, it can increase the conductivity of the strain clamp.

The outer twisted wires 3 are aluminum-clad steel wires such as φ3.5, φ4.0, and φ4.8. Each set of outer twisted wires 3 is made of several aluminum-clad steel wires bonded together. 6 or 7.

The connecting parts of the strain clamp include a heart-shaped extension ring 4, a bowl head hanging plate 5, a ball end hanging ring 7 and a UL type hanging plate 8, all of which are made of hot-dip galvanized stainless steel.

The other end of the UL-type hanging plate 8 is used to fasten the optical fiber composite overhead phase line 1 to the tower through bolts and nuts.

The holding force of the strain clamp is greater than or equal to 90% of the rated tensile strength of the optical fiber composite overhead phase line 1 .

The utility model provides the tension clamp for the optical fiber composite overhead phase line 1. When it is applied on site, the inner twisted wire 2 is first twisted outside the optical fiber composite overhead phase line 1, and then several aluminum-clad steel wires are glued together. Two groups of outer twisted wires 3 formed are twisted together outside the inner twisted wires 2 . The two groups of outer twisted wires 3 are connected to the heart-shaped extension ring 4 from one end, and the other end of the heart-shaped extension ring 4 is connected to the bowl head hanging plate 5, the insulator string 6 composed of a plurality of insulators 61 connected in series, and the ball hanging ring. The ring 7 and the UL-type hanging plate 8, the UL-type hanging plate 8 finally connects the strain clamp to the pole tower through bolts and nuts.

To sum up, the tension clamp for the optical fiber composite overhead phase line provided by the utility model is used to fasten the optical fiber composite overhead phase line 1 optical cable on the pole tower, and the double-layer aluminum-clad steel pre-twisted wire is used. Tension-resistant clips. During installation, each pole tower is equipped with two sets of strain clamps, which are respectively connected to the optical fiber composite overhead phase line 1 on both sides of the pole tower, and the frame terminal is equipped with a set of strain clamps to fix the optical fiber composite overhead phase line 1.

Although the content of the present invention has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions of the present utility model will be obvious to those skilled in the art after reading the above content. Therefore, the protection scope of the present utility model should be defined by the appended claims.

Claims (7)

1. A tension clamp for optical fiber composite overhead phase line (1), characterized in that the tension clamp includes inner strands (2), outer strands (3), heart-shaped extension rings (4 ), bowl head hanging plate (5), insulator string (6), ball end hanging ring (7) and UL type hanging plate (8); The inner twisted wire (2) is coated on the outside of the optical fiber composite overhead phase wire (1); the outer twisted wire (3) is divided into two groups, which are jointly wrapped outside the inner twisted wire (2). The twisted wire (3) outside the group is connected with the heart-shaped extension ring (4) from one end; One end of the heart-shaped extension ring (4) is connected to the outer twisted wire (3), and the other end is connected to the bowl hanging plate (5); The two ends of the insulator string (6) are respectively connected with the other end of the bowl hanging plate (5) and the ball hanging ring (7); The other end of the ball hanging ring (7) is connected to the UL type hanging plate (8); The other end of the UL type hanging plate is connected with the tower. 2. The tension clamp for optical fiber composite overhead phase line (1) according to claim 1, characterized in that, the inner twisted wire (2) is aluminum-clad steel wire; the inner twisted wire ( 2) The inner surface in contact with the optical fiber composite overhead phase line (1) is sprayed with dense conductive sand, and its particle diameter ranges from 0.1mm to 0.2mm. 3. The tension clamp for optical fiber composite overhead phase line (1) according to claim 1, characterized in that, the outer twisted wires (3) are aluminum-clad steel wires, and each group of outer twisted wires (3 ) is bonded by several aluminum-clad steel wires. 4. The tension clamp for optical fiber composite overhead phase line (1) according to claim 1, characterized in that, the insulator string (6) comprises several insulators (61) connected in series. 5. The tension clamp for optical fiber composite overhead phase line (1) according to claim 1, characterized in that, the connecting parts of the tension clamp include a heart-shaped extension ring (4), a bowl head Hanging plate (5), ball head hanging ring (7) and UL type hanging plate (8); the connecting parts are all made of hot-dip galvanized stainless steel. 6. The strain clamp used for fiber composite overhead phase line (1) according to claim 1, characterized in that, the other end of the UL type hanging plate (8) connects the fiber composite overhead through bolts and nuts The phase line (1) is fastened on the tower. 7. The tension clamp for optical fiber composite overhead phase line (1) according to claim 1, characterized in that, the grip force of said tension clamp is greater than or equal to the rated 90% of the tensile strength.

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