CN107887877A - A kind of carbon fiber composite core wire splicing fitting - Google Patents

Abstract

The invention discloses a kind of carbon fiber composite core wire splicing fitting, it includes two fixation kits being symmetrically installed, fixation kit includes junction block and two fixture blocks being arranged in junction block, fixture block is provided with relative the first face and the second face, inclination angle one is provided between first face and the second face, is provided with the tipper coordinated with fixture block inside junction block, the inclination angle of tipper is less than inclination angle one, first face is placed in tipper, and the second face is provided with projection.Carbon fiber composite core wire splicing fitting splicing fitting in the present invention optimizes the structure of wedge grip, wedge-shaped holder and internal lining pipe in existing splicing fitting, shorten the length of splicing sleeve internal combination part, unfolding and the unfolding process of common steel-cored aluminium strand of carbon fiber composite core wire can be made basically identical, operation is easier, work efficiency improves, and substantially reduces because scattered crimp band comes security risk and construction cost.

Description

A carbon fiber composite core wire connection fitting

technical field

The invention relates to the field of metal material preparation, in particular to a carbon fiber composite core wire connecting hardware.

Background technique

As a new type of power transmission wire, carbon fiber composite core wire has the advantages of light weight per unit length of wire under the same cross-section, small sag change at high temperature, and high power transmission capacity compared with ordinary steel-reinforced aluminum stranded wire, so its application prospect is broad. . Specifically, it has the following superior properties:

(1) High tensile strength. Because the high-strength carbon fiber composite core replaces the conventional steel core, the tensile strength is about 2 times that of the general steel-cored aluminum stranded wire, which can extend the span of the tower and reduce the tower by more than 15%;

(2) The coefficient of linear expansion is small. The conductor sag is very small, the results from the actual measurement and experimental test show that the sag is more than 20% smaller than that of the steel-cored aluminum stranded wire, which reduces the height of the tower and the span of the overhead line, and saves the project cost;

(3) Line loss is greatly reduced. Because the carbon fiber composite core conductor is a non-magnetic composite material mainly made of carbon fiber, there is no magnetic loss and eddy current loss, and its line loss is 20% less than that of the steel core aluminum stranded wire under the same transmission capacity;

(4) High conductivity, large carrying capacity and high operating temperature. Because the aluminum stranded wire of carbon fiber composite core conductor is treated with high temperature resistant annealing process, its comprehensive carrying capacity is more than 2 times higher than that of conventional steel-reinforced aluminum stranded wire, and its operating temperature can reach 200 ° C;

(5) Good corrosion resistance. Since the composite core is made of carbon fiber, glass fiber and special epoxy resin, it has high insulation performance and high corrosion resistance.

Since 2006, carbon fiber composite core conductors have been used in short-distance 220 kV, 110 kV technical renovation projects and 500 kV capacity expansion projects. After 2008, various power supply companies in northern my country have gradually introduced carbon fiber composite core conductors for network hanging trial operation. net running.

Since the carbon fiber mandrel inside the carbon fiber composite core conductor is a brittle material, especially the radial compressive strength is poor, in domestic projects, the size of the carbon fiber composite core conductor connection fittings is too large, and the carbon fiber composite core is likely to be damaged when the pulley is passed during construction. Wire damage. When passing the trolley, the mandrel of the carbon fiber composite core conductor is easy to be damaged, and the outer aluminum wire is easy to loose strands or "lantern", so that the centralized crimping and tension release process of the linear splice tube required for the large-scale application of the carbon fiber composite core conductor cannot be realized. . The specific reasons are as follows:

(l) At present, wedge-shaped clamps, fastening bolts and two-way adjustable fasteners are all connected by external threads, resulting in an unnecessary increase in the length and volume of the entire connecting pipe;

(2) There is no precise analysis of the stress on the wedge-shaped clamp, the wedge-shaped clamp seat and the carbon fiber mandrel. It is one-sidedly believed that increasing the length of the wedge-shaped clamp can increase the grip force on the carbon fiber mandrel, and the length of the wedge-shaped clamp has no effect. increase;

(3) There is no accurate analysis of the cone angle of the wedge-shaped clamp and the wedge-shaped clamp seat, resulting in stress concentration at the front end of the wedge-shaped clamp, causing irreparable "bite" damage to the carbon fiber mandrel, and reducing the safety of the carbon fiber composite core conductor. sex;

(4) There is no overall consideration of the power-on effect and heat dissipation capacity of the connecting fittings, and it cannot fully meet the heat dissipation requirements of the running line for the connecting fittings. The heat of the connecting fittings may cause damage to the carbon fiber composite core wire, and the carbon fiber composite high-voltage wire cannot be guaranteed. The safety of long-distance power transmission.

Contents of the invention

Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a carbon fiber composite core wire connecting hardware with simple structure and good fastening effect.

A carbon fiber composite core wire connection fitting, comprising two symmetrically installed fixing components, the fixing components include a joint tube and two clamping blocks arranged in the joint tube, the clamping blocks are provided with opposite first surfaces and second There is an inclination angle 1 between the first surface and the second surface, and an inclination groove cooperating with the clamp block is provided inside the joint pipe, the inclination angle of the inclination groove is smaller than the inclination angle one, The first surface is placed in the inclined groove, and the second surface is provided with a protrusion.

As a further improvement of the present invention, a hose is installed between the two clamping blocks.

As a further improvement of the present invention, the hose is a metal hose.

As a further improvement of the present invention, a stud bolt is installed on the joint pipe, and the two fixing components are connected through the stud bolt.

As a further improvement of the present invention, a heat dissipation mechanism is installed outside the fixing assembly.

As a further improvement of the present invention, the heat dissipation mechanism is a heat dissipation finned tube.

As a further improvement of the present invention, the protrusions are serrated protrusions.

As a further improvement of the present invention, the inclination angle one is 11-45°.

As a further improvement of the present invention, the inclination angle - is 1-5° larger than the inclination angle of the inclination groove.

Beneficial effects of the present invention:

(1) The splicing fitting optimizes the structure of the wedge-shaped clip, the wedge-shaped clip seat and the inner liner in the existing splicing fittings, shortens the length of the internal assembly of the splicing pipe, and can make the deployment of the carbon fiber composite core conductor similar to that of ordinary steel-reinforced aluminum The unfolding process of the stranded wire is basically the same, the operation is more convenient, the work efficiency is improved, and the safety risk and construction cost caused by scattered crimping are greatly reduced;

(2) The taper angles of the wedge-shaped clip and the wedge-shaped clip seat take different values, and the self-locking relationship between the wedge-shaped clip and the wedge-shaped clip seat can be optimized by fastening with the taper angle difference, so as to realize the effective fastening of the wedge-shaped clip to the carbon fiber mandrel , to ensure sufficient grip between the wedge-shaped clamp and the carbon fiber mandrel, thereby ensuring the long-term safe use of the connecting fittings;

(3) The serrated wedge clamp is adopted, combined with the inner copper alloy hose, so that the wedge clamp gradually clamps the carbon fiber mandrel from the rear end to the front, which is beneficial to reduce the bite of the carbon fiber mandrel by the wedge clamp. Improve fastening efficiency and safety factor;

(4) Install aluminum alloy finned tubes on the outside of the wedge-shaped seat for heat dissipation, which can avoid the damage to the carbon fiber composite core wire caused by the temperature rise of the wire, and ensure the safety of long-distance power transmission of the carbon fiber composite high-voltage wire.

Detailed ways

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a schematic structural view of a carbon fiber composite core wire connecting fitting in an embodiment of the present invention.

Marking description: 10. Joint pipe; 11. Stud bolt; 20. Clamp block; 21. First side; 22. Second side; 30. Aluminum wire; 40. Metal hose; 50. Carbon fiber rod; 60. Heat dissipation Finned tubes.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

As shown in Figure 1, it is a carbon fiber composite core wire connecting fitting of the present invention, which includes two symmetrically installed fixing assemblies, the fixing assembly includes a joint pipe 10, and a stud bolt 11 is installed on the joint pipe 10, and the two fixing assemblies pass through the double-ended Bolts 11 are connected, aluminum wires 30 are installed at both ends of the two fixed components, and an inclined groove is provided in the joint pipe 10. Two clamping blocks 20 are symmetrically arranged in the inclined groove, and a metal hose 40 is installed between the two clamping blocks 20. A carbon fiber rod 50 is fixed inside the metal software 40. The clamping block 20 includes a first surface 21 and a second surface 22. The inclination angle of the first surface 21 and the second surface 22 is α, and the angle α is larger than the inclination angle of the inclined groove. The angle difference is Δα, the second surface 22 is provided with serrated protrusions, and the outer side of the fixing assembly is equipped with cooling finned tubes 60 for dissipating heat from the carbon fiber rod 50 and avoiding damage to the carbon fiber rod 50 caused by excessive temperature.

Preferably, the angle α is 11-45°, the inclination angle of the inclined groove is 10-40°, and the angle difference Δα between the angle α and the inclination angle of the inclined groove is 1-5°.

Preferably, the joint pipe 10 and the clamp block 20 are made of stainless steel;

Preferably, the metal hose 40 is a copper alloy with a diameter of 6-20mm and a wall thickness of 0.5-2mm. The inner diameter of the metal hose 40 is determined according to the outer diameter of the carbon fiber rod 50, which is 1-2mm larger than the outer diameter of the carbon fiber rod 50;

Preferably, the height of the serrated protrusions is 0.5-3mm, and the distance between the serrated protrusions is 2-5mm;

Preferably, the stud bolt 11 has a length of 15-60 mm, an outer diameter of 4-20 mm, and a thread pitch of 1-3 mm;

Preferably, the heat dissipation fin tube 60 is made of pure aluminum or aluminum alloy, with a diameter of 15-50 mm, a wall thickness of 2-5 mm, an inner diameter equal to that of the joint tube 10 and the outer diameter of the aluminum wire 30, and a fin height of 3-20 mm. Sheet thickness 1-3mm.

When in use, place two carbon fiber rods 50 in two metal hoses 40 respectively, and fix the two joint pipes 10 by stud bolts 11. 50 is effectively fastened to play a self-locking effect, ensuring the gripping force between the clamp block 20 and the carbon fiber rod 50. The serrated protrusion clamps the carbon fiber mandrel 50 progressively forward from the rear end, which helps to reduce the bite of the front end of the carbon fiber mandrel 50 by the clamping block 20 .

Compared with the existing connecting fittings at present, the joint pipe 10 is similar to the wedge-shaped clamp seat, the clamp block 20 is similar to the wedge-shaped clamp, and the metal hose 40 is equivalent to the inner liner therein.

Beneficial effects of the present invention:

(1) The splicing fitting optimizes the structure of the existing wedge-shaped clamp, wedge-shaped clamp seat, and liner tube, shortens the length of the internal assembly of the splicing tube, and enables the deployment of carbon fiber composite core conductors to be similar to ordinary steel cores. The unfolding process of aluminum stranded wire is basically the same, the operation is more convenient, the work efficiency is improved, and the safety risk and construction cost caused by scattered crimping are greatly reduced;

(2) The taper angles of the wedge-shaped clip and the wedge-shaped clip seat take different values, and the self-locking relationship between the wedge-shaped clip and the wedge-shaped clip seat can be optimized by fastening with the taper angle difference, so as to realize the effective fastening of the wedge-shaped clip to the carbon fiber mandrel , to ensure sufficient grip between the wedge-shaped clamp and the carbon fiber mandrel, thereby ensuring the long-term safe use of the connecting fittings;

(3) The serrated wedge clamp is adopted, combined with the inner copper alloy hose, so that the wedge clamp gradually clamps the carbon fiber mandrel from the rear end to the front, which is beneficial to reduce the bite of the carbon fiber mandrel by the wedge clamp. Improve fastening efficiency and safety factor;

(4) Install aluminum alloy finned tubes on the outside of the wedge-shaped seat for heat dissipation, which can avoid the damage to the carbon fiber composite core wire caused by the temperature rise of the wire, and ensure the safety of long-distance power transmission of the carbon fiber composite high-voltage wire.

The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention shall be determined by the claims.

Claims (9)

1. A carbon fiber composite core wire connection fitting, comprising two symmetrically installed fixing assemblies, characterized in that the fixing assembly includes a joint pipe and two clamping blocks arranged in the joint pipe, and the clamping blocks are provided with opposite The first surface and the second surface, an inclination angle 1 is set between the first surface and the second surface, and an inclination groove matching the clamp block is arranged inside the joint pipe, and the inclination angle of the inclination groove is less than The inclined angle is one, the first surface is placed in the inclined groove, and the second surface is provided with a protrusion. 2. The carbon fiber composite core wire connecting fitting according to claim 1, wherein a hose is installed between the two clamping blocks. 3. The carbon fiber composite core wire connecting hardware according to claim 2, characterized in that, the hose is a metal hose. 4. The carbon fiber composite core wire splicing fitting according to claim 1, wherein a stud bolt is installed on the joint pipe, and the two fixing components are connected by the stud bolt. 5 . The carbon fiber composite core wire connecting hardware according to claim 1 , wherein a heat dissipation mechanism is installed on the outside of the fixing component. 6 . 6. The carbon fiber composite core wire connecting hardware according to claim 5, characterized in that, the heat dissipation mechanism is a heat dissipation finned tube. 7. The carbon fiber composite core wire connecting hardware according to claim 1, characterized in that, the protrusions are serrated protrusions. 8 . The carbon fiber composite core wire connecting hardware according to claim 1 , wherein the inclination angle one is 11-45°. 9. The carbon fiber composite core wire connecting hardware according to claim 1, characterized in that, the inclination angle - is 1-5° larger than the inclination angle of the inclined groove.