CN205541996U - 3 full tension preformed helical of concentric turntable hollow wire of layer aluminium hank layer circle line strip that continues - Google Patents

Abstract

The utility model discloses a 3 full tension preformed helical of concentric turntable hollow wire of layer aluminium hank layer circle line strip that continues, including the concentric turntable hollow wire of two yuan of lines, inlayer strip, first layer packing, second floor packing and outer strip, many step shafts form is set to the concentric turntable hollow wire junction of two yuan of lines tip, and its tip all has central sinle silk, first layer aluminium hank layer, second floor aluminium hank layer and the third layer aluminium hank shelled out layer, the inlayer strip kinks on central sinle silk, the first layer packing kinks on the inlayer strip, and its length is greater than inlayer strip length, and its both ends send forth and partly kink on first layer aluminium twists the layer, second floor packing kinks on the first layer packing, has increased an area of contact that continues, and current density reduces, and the contact resistance that the strip that continues is connected diminishes, and the junction generates heat forer a short time, and joint strength is better, and the grip is bigger and the retentivity grip is better, and the grip of avoiding the high temperature to cause is not enough, and the utility model discloses still have simple structure, preparation convenient and fast, characteristics with low costs.

Description

A kind of 3 layers of aluminum twisted layer round wires concentric gallows empty conductor preformed connecting strip of full tension force

Technical field

This utility model relates to a kind of 3 layers of aluminum twisted layer round wires concentric gallows empty conductor preformed connecting strip of full tension force, for the three layers of aluminum full tension force of twisted layer round wires concentric gallows empty conductor preformed connecting strip attachment structure, belongs to a kind of power transmission line technical field.

Background technology

In the past to overhead power transmission conducting wire, often think that wire carries is alternating current, alternating current has Kelvin effect, think that round wires concentric gallows empty conductor inner conductor is inessential, and reality finds, the alternating current of 50Hz, the skin depth of aluminum be 11.74mm, below LGJ-400 round wires concentric gallows empty conductor be that total cross-section crosses stream.In the three layers of present aluminum full tension force of twisted layer round wires concentric gallows empty conductor preformed connecting strip repair technology, the preformed armor rods of packing disconnects with round wires concentric gallows empty conductor inner conductor, gap is more than ten millimeter, the complete preformed connecting strip of tension force is all only by inner layer strips (steel), packing (aluminium alloy, 1 layer), outer layer bar (aluminium alloy) is constituted, as shown in Figure 3, packing is discontinuous with wire aluminum twisted layer, the effect of transmission electric current is the most weak, cause in packing tip-clearance outer layer bar electric current density excessive, when ambient temperature is too high cause outer layer bar and round wires concentric gallows empty conductor contact resistance to increase time, at packing tip-clearance, core electric current in center increases heating, center core intensity is caused to reduce fracture.

Summary of the invention

The technical problems to be solved in the utility model is: provide a kind of 3 layers of aluminum twisted layer round wires concentric gallows empty conductor preformed connecting strip of full tension force, connecting strip contact area increases, electric current density is little, connect contact resistance to reduce, generate heat little, bonding strength is good, and grip is big and retentivity good, to solve problems of the prior art.

nullThe technical scheme that this utility model is taked is: a kind of 3 layers of aluminum twisted layer round wires concentric gallows empty conductor preformed connecting strip of full tension force，Including two round wires concentric gallows empty conductors、Inner layer strips、Ground floor packing、Second layer packing and outer layer bar，Described two ends, round wires concentric gallows empty conductor junction are arranged to multi-ladder shaft-like，Its end all has the center core of strip off、Ground floor aluminum twisted layer、Second layer aluminum twisted layer and third layer aluminum twisted layer，Described inner layer strips kinks on the core of center，Described ground floor packing kinks in inner layer strips，Its length is more than inner layer strips length，Its two ends grow part and kink in ground floor aluminum twisted layer，Described second layer packing kinks on ground floor packing，Its length is more than ground floor packing length，Its two ends grow part and kink in second layer aluminum twisted layer，Described outer layer bar kinks on second layer packing，Its length is more than second layer packing length，Its two ends grow part and kink in third layer aluminum twisted layer.

Preferably, above-mentioned inner layer strips material is spring steel or aluminum bag spring steel.

Preferably, above-mentioned inner layer strips length presses connecting strip standard application according to the difference of round wires concentric gallows empty conductor model, the steel wire diameter of inner layer strips is equal to the aluminium wire diameter of ground floor aluminum twisted layer, the external diameter of inner layer strips is equal to ground floor aluminum twisted layer external diameter, and the standard of connecting strip is aerial condutor pre-twisted line hardware technical conditions (DL/T 763-2001).

Preferably, the steel wire radical of above-mentioned inner layer strips is equal to the aluminium wire radical of ground floor aluminum twisted layer, and inner layer strips strand is to for left-hand.

Preferably, above-mentioned ground floor packing and second layer packing material are duralumin.

Preferably, above-mentioned ground floor packing length is equal to the pitch length of+10 times of ground floor aluminum twisted layers of inner layer strips length, the aluminium wire diameter of ground floor packing is equal to the aluminium wire diameter of second layer aluminum twisted layer, the second layer aluminum twisted layer external diameters such as the external diameter of ground floor packing, the aluminium wire radical of ground floor packing is equal to the aluminium wire radical of second layer aluminum twisted layer, and ground floor packing strand is to for dextrad.

Preferably, above-mentioned second layer packing length is equal to the pitch length of+10 times of second layer aluminum twisted layers of ground floor packing length, the aluminium wire diameter of second layer packing is equal to the aluminium wire diameter of third layer aluminum twisted layer, the external diameter of second layer packing is equal to third layer aluminum twisted layer external diameter, the aluminium wire radical of second layer packing is equal to the aluminium wire radical of third layer aluminum twisted layer, and second layer packing strand is to for left-hand.

Preferably, above-mentioned outer layer bar material is duralumin.

Preferably, above-mentioned outer layer article length is equal to the pitch length of+10 times of third layer aluminum twisted layers of the 2nd layer of packing length, the aluminium wire diameter of outer layer bar is equal to the aluminium wire diameter of third layer aluminum twisted layer, the external diameter of outer layer bar is equal to the aluminium wire diameter of third layer+2 times of third layer aluminum twisted layers of aluminum twisted layer external diameter, the aluminium wire radical of outer layer bar is equal to outer layer bar girth/line footpath, and outer layer bar strand is to for dextrad.

nullThe beneficial effects of the utility model: compared with prior art，This utility model pin is stepwise snapped in the aluminum twisted layer of round wires concentric gallows empty conductor by two-layer packing，Ensure that the aluminum stranded conductor layer seriality of three layers of aluminum twisted layer round wires concentric gallows empty conductor，The connecting strip contact area of round wires concentric gallows empty conductor is big，Electric current density reduces，The contact resistance that connecting strip connects diminishes，Connection position heating is little，The most existing connected mode temperature step-down significantly，And bonding strength is more preferable，Bigger and grip the retentivity of grip is more preferable，In the case of connecting strip grip ensure that，Save the use of glue and corundum，It is substantially reduced the contact resistance at connecting strip，Efficiently solve the center core intensity step-down caused present in prior art because local temperature is too high and problem that connecting strip directly ruptures，And this utility model also has simple in construction、Easy to make fast、The feature of low cost.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model；

Fig. 2 is processing technology procedure structure schematic diagram of the present utility model；

Fig. 3 is the existing three layers of aluminum full tension force of twisted layer round wires concentric gallows empty conductor preformed connecting strip structural representation.

In figure: 1-inner layer strips, 2-ground floor packing, 3-second layer packing, 4-outer layer bar, 5-round wires concentric gallows empty conductor, 6-center core, 7-ground floor aluminum twisted layer, 8-second layer aluminum twisted layer, 9-third layer aluminum twisted layer.

Detailed description of the invention

Below in conjunction with the accompanying drawings and invention is described further by specific embodiment.

nullEmbodiment 1: as shown in Figure 1-Figure 3，A kind of 3 layers of aluminum twisted layer round wires concentric gallows empty conductor preformed connecting strip of full tension force，Including two round wires concentric gallows empty conductors 5、Inner layer strips 1、Ground floor packing 2、Second layer packing 3 and outer layer bar 4，Two end, round wires concentric gallows empty conductor 5 junctions are arranged to multi-ladder shaft-like，Its end all has the center core 6 of strip off、Ground floor aluminum twisted layer 7、Second layer aluminum twisted layer 8 and third layer aluminum twisted layer 9，Three layers of aluminum twisted layer are the most respectively in ladder shaft type，Inner layer strips 1 kinks on center core 6，Described ground floor packing 2 kinks in inner layer strips 1，Its length is more than inner layer strips 1 length，Its two ends grow part and kink in ground floor aluminum twisted layer 7，Described second layer packing 3 kinks on ground floor packing 2，Its length is more than ground floor packing 2 length，Its two ends grow part and kink in second layer aluminum twisted layer 8，Described outer layer bar 4 kinks on second layer packing 3，Its length is more than second layer packing 3 length，Its two ends grow part and kink in third layer aluminum twisted layer 9，Kinking in this utility model is all that spiral kinks.

Preferably, above-mentioned inner layer strips 1 material is spring steel or aluminum bag spring steel, inner layer strips 1 length presses connecting strip standard application according to the difference of round wires concentric gallows empty conductor model, the steel wire diameter of inner layer strips 1 is equal to the aluminium wire diameter of ground floor aluminum twisted layer 7, the external diameter of inner layer strips 1 is equal to ground floor aluminum twisted layer 7 external diameter, and the standard of connecting strip is aerial condutor pre-twisted line hardware technical conditions (DL/T 763-2001).

Preferably, the steel wire radical of above-mentioned inner layer strips 1 is equal to the aluminium wire radical of ground floor aluminum twisted layer 7, inner layer strips 1 is twisted to for left-hand, i.e. press left hand helix, namely with the strand of center core to identical, center core be the inner layer strips lay ratio of the round wires concentric gallows empty conductor of 7 steel wires be 16～26, center core be the inner layer strips lay ratio of the round wires concentric gallows empty conductor of 19 steel wires be 14～22.

Preferably, above-mentioned ground floor packing 2 material is duralumin.

Preferably, above-mentioned ground floor packing 2 length is equal to the pitch length of+10 times of ground floor aluminum twisted layers 7 of inner layer strips 1 length, the aluminium wire diameter of ground floor packing 2 is equal to the aluminium wire diameter of second layer aluminum twisted layer 8, second layer aluminum twisted layer 8 external diameters such as the external diameter of ground floor packing 2, the aluminium wire radical of ground floor packing 2 is equal to the aluminium wire radical of second layer aluminum twisted layer 8, ground floor packing 2 twists to for dextrad, i.e. press right-handed helix, namely twisting to identical with ground floor aluminum twisted layer 7, ground floor packing 2 lay ratio is 10～16.

Preferably, above-mentioned second layer packing 3 material is duralumin, second layer packing 3 length is equal to the pitch length of+10 times of second layer aluminum twisted layers 8 of ground floor packing 2 length, the aluminium wire diameter of second layer packing 3 is equal to the aluminium wire diameter of third layer aluminum twisted layer 9, the external diameter of second layer packing 3 is equal to third layer aluminum twisted layer 9 external diameter, the aluminium wire radical of second layer packing 3 is equal to the aluminium wire radical of third layer aluminum twisted layer 9, second layer packing 3 twists to for left-hand, i.e. press left hand helix, namely twisting to identical with second layer aluminum twisted layer 8, second layer packing 3 lay ratio is 10～16.

Preferably, above-mentioned outer layer bar 4 material is duralumin, outer layer article 4 length is equal to the pitch length of+10 times of third layer aluminum twisted layers 9 of the 2nd layer of packing 3 length, the aluminium wire diameter of outer layer bar 4 is equal to the aluminium wire diameter of third layer aluminum twisted layer 9, the external diameter of outer layer bar 4 is equal to the aluminium wire diameter of third layer+2 times of third layer aluminum twisted layers 9 of aluminum twisted layer 9 external diameter, the aluminium wire radical of outer layer bar 4 is equal to outer layer bar 4 girths/line footpath, outer layer bar 4 twists to for dextrad, i.e. press right-handed helix, namely twisting to identical with third layer aluminum twisted layer 9, outer layer bar 4 lay ratio is 10～14.

The above; it is only detailed description of the invention of the present utility model; but protection domain of the present utility model is not limited thereto; any those familiar with the art is in the technical scope that this utility model discloses; change can be readily occurred in or replace; all should contain within protection domain of the present utility model, therefore, protection domain of the present utility model should be as the criterion with described scope of the claims.

Claims (9)

1. null1. the one kind 3 layers aluminum twisted layer round wires concentric gallows empty conductor preformed connecting strip of full tension force，It is characterized in that: include two round wires concentric gallows empty conductors (5)、Inner layer strips (1)、Ground floor packing (2)、Second layer packing (3) and outer layer bar (4)，Described two round wires concentric gallows empty conductor (5) ends, junction are arranged to multi-ladder shaft-like，Its end all has the center core (6) of strip off、Ground floor aluminum twisted layer (7)、Second layer aluminum twisted layer (8) and third layer aluminum twisted layer (9)，Described inner layer strips (1) kinks on center core (6)，Described ground floor packing (2) kinks in inner layer strips (1)，Its length is more than inner layer strips (1) length，Its two ends grow part and kink on ground floor aluminum twisted layer (7)，Described second layer packing (3) kinks on ground floor packing (2)，Its length is more than ground floor packing (2) length，Its two ends grow part and kink on second layer aluminum twisted layer (8)，Described outer layer bar (4) kinks on second layer packing (3)，Its length is more than second layer packing (3) length，Its two ends grow part and kink in third layer aluminum twisted layer (9).
2. A kind of 3 layers of aluminum twisted layer round wires concentric gallows empty conductor preformed connecting strip of full tension force the most according to claim 1, it is characterised in that: described inner layer strips (1) material is spring steel or aluminum bag spring steel.
3. A kind of 3 layers of aluminum twisted layer round wires concentric gallows empty conductor preformed connecting strip of full tension force the most according to claim 1, it is characterized in that: described inner layer strips (1) length according to the difference of round wires concentric gallows empty conductor model by connecting strip standard application, the steel wire diameter of inner layer strips (1) is equal to ground floor aluminum twisted layer (7) external diameter equal to the aluminium wire diameter of ground floor aluminum twisted layer (7), the external diameter of inner layer strips (1).
4. A kind of 3 layers of aluminum twisted layer round wires concentric gallows empty conductor preformed connecting strip of full tension force the most according to claim 1, it is characterized in that: the steel wire radical of described inner layer strips (1) is equal to the aluminium wire radical of ground floor aluminum twisted layer (7), and inner layer strips (1) strand is to for left-hand.
5. A kind of 3 layers of aluminum twisted layer round wires concentric gallows empty conductor preformed connecting strip of full tension force the most according to claim 1, it is characterised in that: described ground floor packing (2) and second layer packing (3) material are duralumin.
6. A kind of 3 layers of aluminum twisted layer round wires concentric gallows empty conductor preformed connecting strip of full tension force, it is characterized in that: described ground floor packing (2) length is equal to the pitch length of+10 times of ground floors aluminum twisted layer (7) of inner layer strips (1) length, the aluminium wire diameter of ground floor packing (2) is equal to the aluminium wire diameter of second layer aluminum twisted layer (8), second layer aluminum twisted layer (8) external diameters such as the external diameter of ground floor packing (2), the aluminium wire radical of ground floor packing (2) is equal to the aluminium wire radical of second layer aluminum twisted layer (8), ground floor packing (2) strand is to for dextrad.
7. A kind of 3 layers of aluminum twisted layer round wires concentric gallows empty conductor preformed connecting strip of full tension force, it is characterized in that: described second layer packing (3) length is equal to the pitch length of+10 times of second layers aluminum twisted layer (8) of ground floor packing (2) length, the aluminium wire diameter of second layer packing (3) is equal to the aluminium wire diameter of third layer aluminum twisted layer (9), the external diameter of second layer packing (3) is equal to third layer aluminum twisted layer (9) external diameter, the aluminium wire radical of second layer packing (3) is equal to the aluminium wire radical of third layer aluminum twisted layer (9), second layer packing (3) strand is to for left-hand.
8. A kind of 3 layers of aluminum twisted layer round wires concentric gallows empty conductor preformed connecting strip of full tension force the most according to claim 1, it is characterised in that: described outer layer bar (4) material is duralumin.
9. 9. according to 3 layers of aluminum twisted layer round wires concentric gallows empty conductor preformed connecting strip of full tension force of the one described in claim 1 or 8, it is characterized in that: described outer layer article (4) length is equal to the pitch length of the 2nd layer of packing (3)+10 times of third layer aluminum twisted layer (9) of length, the aluminium wire diameter of outer layer bar (4) is equal to the aluminium wire diameter of third layer aluminum twisted layer (9), the external diameter of outer layer bar (4) is equal to the aluminium wire diameter of third layer+2 times of third layer aluminum twisted layer (9) of aluminum twisted layer (9) external diameter, the aluminium wire radical of outer layer bar (4) is equal to outer layer bar (4) girth/line footpath, outer layer bar (4) strand is to for dextrad.