CN201011701Y

CN201011701Y - Pre-twisted double strain clamp used for steel core aluminum strand wire

Info

Publication number: CN201011701Y
Application number: CNU2007201036805U
Authority: CN
Inventors: 马跃
Original assignee: BEIJING PARRPU LINE COLORING EQUIPMENT CO LTD
Current assignee: BEIJING PARRPU LINE COLORING EQUIPMENT CO LTD
Priority date: 2007-02-28
Filing date: 2007-02-28
Publication date: 2008-01-23
Anticipated expiration: 2017-02-28

Abstract

The utility model discloses a pre stranded double strain wire clamp used for a steel core aluminum stranding wire. The strain clamp includes a heart shaped ring and two pre stranded stranding wire groups. Each wire group consists of a plurality of pre stranded wires mutually bonded and fixed. The pre stranding wire groups overall are bent to a symmetric U shape. The free sections of the pre stranded wire groups are winded to be screw pipe shape. The heart shaped ring has the U shaped groove, the two sidewalls of which are provided with a mounting hole. The bottom of the U shaped groove is connected with the holding groove overall partially taking ring shape. The plane the holding groove positioned is vertical to the axial line of the mounting hole. The enclosed part of heart shaped ring by the holding groove is also provided with a through hole. The two pre stranded wire groups are respectively sleeved into the holding groove and through hole on the heart shaped groove. The utility model adopts a structure of double pre stranded wire groups which are respectively formed by the pre stranded wires made of two different materials. Therefore, the utility model not only ensures the mounting intensity but also the temperature rise of the aluminum enclosed steel pre stranded wires can be conducted to aluminum alloy pre stranded wires with better heat dispersing effect under the effect of the steel core aluminum stranded wires. The two pre stranded wires share common hear dispersing function.

Description

Steel reinforced aluminium conductor is with preformed pair of strain clamp

Technical field

The utility model relates to the strain insulator anchor clamps of using on a kind of steel reinforced aluminium conductor.

Background technology

Utilize existing preformed strain clamp when sectional area is installed greater than 300 square millimeters steel reinforced aluminium conductor, not only have the problem of grip deficiency, but also have the defective of heating, thereby exist serious potential safety hazard.How to guarantee that the strain clamp twisted pair wire has enough big grip force, and eliminate the wire clamp heating, become technical staff's technical issues that need to address.

The utility model content

At the problem that prior art exists, the purpose of this utility model is to provide a kind of thermal diffusivity is good, intensity is high, easy to use steel reinforced aluminium conductor with preformed pair of strain clamp.

For achieving the above object, technical solution of the present utility model is:

A kind of steel reinforced aluminium conductor comprises a thimble and two preformed armor rods groups with preformed pair of strain clamp, and two preformed armor rods groups all are sleeved on the thimble; Described preformed armor rods group comprises some preformed armor rodses, bonding is fixing between each preformed armor rods, preformed armor rods group integral body is bent into the U-shaped of symmetry, according to its section configuration, be divided into U-shaped bottom branch and reach the free section of joining with two ends at the bottom of the U-shaped, wherein preformed armor rods group branch bottom U-shaped is wound in the twisted wire shape, in two free section parts, each root preformed armor rods in the preformed armor rods group at first is arranged in a row, and then integral body is wound in helix; Have a U-lag on the described thimble, be provided with an installing hole that vertically runs through the two side near its upper edge on this U-lag two side, U-lag two bottom sides opening extends away from the curved symmetry of described through hole direction from two side direction respectively, thereby form an arc and push up the holding tank that the integral body that is positioned at U-lag bottom centre is the part annular, the axis normal of this plane, holding tank place and described installing hole, thimble on the part that described holding tank surrounded, also be provided with one with described installing hole through hole in the same way; Described two preformed armor rods groups are set at the bottom of by U-shaped separately in the holding tank and through hole on the described thimble, and plane, two preformed armor rods group places is vertical mutually, and the free section of two on the two preformed armor rods groups is all to extending back to thimble U-lag opening direction; The line of the preformed armor rods in two preformed armor rods groups footpath, and the length of free section match with the specification of the steel reinforced aluminium conductor that will be connected, the internal diameter of the free section of helix is slightly less than the external diameter of the steel reinforced aluminium conductor that will connect, and the hand of spiral of free section is identical with the hand of spiral of twisted wire to be connected.

Further, the preformed armor rods in one of described two preformed armor rods groups is the aluminium alloy preformed armor rods, and the preformed armor rods in another preformed armor rods group is an aluminium Baogang preformed armor rods.

Further, the inner surface of described two groups of preformed armor rodses all is bonded with a layer of sand.

Because the utility model steel reinforced aluminium conductor adopts two preformed armor rods group structures with preformed pair of strain clamp, free section in the two preformed armor rods groups is wrapped in treats fixedly to get final product on the steel reinforced aluminium conductor, thereby it is easy to use, in addition, two preformed armor rods groups are made up of the preformed armor rods of two kinds of different materials respectively, both guaranteed installation strength, simultaneously aluminium Baogang preformed armor rods is transmitted on the aluminium alloy preformed armor rods that dispels the heat preferably in the temperature rise meeting that produces under the steel reinforced aluminium conductor effect, common heat radiation.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is a preformed armor rods group structural representation shown in the

sequence number

2,3 among Fig. 1;

Fig. 3 is an A-A view among Fig. 2;

Fig. 4 is a thimble front view shown in the sequence number 1 among Fig. 1;

Fig. 5 is the thimble vertical view;

Fig. 6 is a B-B view among Fig. 4;

Fig. 7 is the utility model user mode schematic diagram.

Embodiment:

Specify the utility model below in conjunction with accompanying drawing.

As shown in Figure 1, the utility model steel reinforced aluminium conductor is with preformed pair of strain clamp, comprise thimble 1, preformed armor rods group 2 and preformed armor rods group 3, preformed armor rods group 2 is sleeved in the holding tank that is provided with on the thimble, preformed armor rods group 3 is sleeved in the through hole that is provided with on the thimble, thus constitute one by thimble 1 for the strain clamp that links to each other with outside support, 2,3 confessions of preformed armor rods group link to each other with twisted wire to be tensioned.

As Fig. 2, shown in Figure 3, preformed armor rods group 2 is made by some preformed armor rodses 24, the preformed armor rods group comprises 21 and two free section 22 two parts at the bottom of the U-shaped on the whole, each preformed armor rods 24 of 21 parts is wound in the twisted wire form at the bottom of the U-shaped, each preformed armor rods 24 of free section 22 parts at first is arranged in a row, and then integral body is wound in helix.Bonding is fixing mutually between each preformed armor rods 24 of 21 parts and two free section 22 parts at the bottom of the U-shaped.The radially inboard surface of the free section 22 of helix also is bonded with a conduction layer of sand 23.

The structure of preformed armor rods group 3 and preformed armor rods group 2 are identical, and different is for the two, and the preformed armor rods 24 in the preformed armor rods group 2 is an aluminium Baogang preformed armor rods, and the preformed armor rods in the preformed armor rods group 3 is the aluminium alloy preformed armor rods.

Shown in Fig. 4-6, have a U-lag 11 on the thimble 1, be provided with an installing hole 12 that vertically runs through the two side near its upper edge on these U-lag 11 two sides, U-lag bottom 13 both-side openings extend away from the curved symmetry of installing hole 12 directions from two side direction respectively, thereby form an arc and push up the holding tank 14 that the integral body that is positioned at 13 centers, U-lag bottom is the part annular, the plane at these holding tank 14 places and the axis normal of installing hole 12, the shape of 21 parts is complementary at the bottom of the U-shaped of the shape of holding tank 14 and preformed armor rods group 2.Thimble 1 also is provided with a through hole 15 on the part that holding tank 14 is surrounded, the axis direction of this through hole 15 is identical with installing hole 12.

Preformed armor rods group 2 by its U-shaped at the bottom of 21 parts be sleeved in the holding tank 14 on the thimble 1, preformed armor rods group 3 is divided in the through hole 15 that is sleeved on the thimble 1 by its U-shaped bottom, and four free sections of two preformed

armor rods groups

2,3 are all to extending back to thimble U-lag 11 opening directions.

In order to guarantee reliably to be connected between two preformed

armor rods groups

2,3 and the twisted wire 4 to be tensioned, the line footpath of the preformed armor rods in the two preformed

armor rods groups

2,3, the internal diameter and the length thereof of the free section of helix all will be complementary with twisted wire 4 to be tensioned, wherein the internal diameter outline of the free section of helix is less than the external diameter of twisted wire 4, and the hand of spiral of two free sections is identical with the hand of spiral of twisted wire to be tensioned on each preformed armor rods group simultaneously.

As shown in Figure 7, the utility model strain clamp in use, one end links to each other with the outside support (not shown) by the installing hole 12 on the thimble 1, the other end links to each other with twisted wire 4 by preformed

armor rods group

2,3, four free sections on the two preformed

armor rods groups

2,3 all are wrapped on the twisted wire 4, and twisted wire 4 is wrapped, and the enough grip forces of twisted pair wire 4 generations, to guarantee effective stretch-draw of twisted pair wire 4.Behind the bonding one deck conduction sand of the radially inboard surface of the free section of preformed

armor rods group

2,3 helix, can increase the coefficient of friction between preformed armor rods group and the twisted wire 4, thereby improve the grip force of twisted pair wire 4.

Claims

1. a steel reinforced aluminium conductor is characterized in that with preformed pair of strain clamp, comprises a thimble and two preformed armor rods groups, and two preformed armor rods groups all are sleeved on the thimble; Described preformed armor rods group comprises some preformed armor rodses, bonding is fixing between each preformed armor rods, preformed armor rods group integral body is bent into the U-shaped of symmetry, according to its section configuration, be divided into U-shaped bottom branch and reach the free section of joining with two ends at the bottom of the U-shaped, wherein preformed armor rods group branch bottom U-shaped is wound in the twisted wire shape, in two free section parts, each root preformed armor rods in the preformed armor rods group at first is arranged in a row, and then integral body is wound in helix; Have a U-lag on the described thimble, be provided with an installing hole that vertically runs through the two side near its upper edge on this U-lag two side, U-lag two bottom sides opening extends away from the curved symmetry of described through hole direction from two side direction respectively, thereby form an arc and push up the holding tank that the integral body that is positioned at U-lag bottom centre is the part annular, the axis normal of this plane, holding tank place and described installing hole, thimble on the part that described holding tank surrounded, also be provided with one with described installing hole through hole in the same way; Described two preformed armor rods groups are set at the bottom of by U-shaped separately in the holding tank and through hole on the described thimble, and plane, two preformed armor rods group places is vertical mutually, and the free section of two on the two preformed armor rods groups is all to extending back to thimble U-lag opening direction; The line of the preformed armor rods in two preformed armor rods groups footpath, and the length of free section match with the specification of the steel reinforced aluminium conductor that will be connected, the internal diameter of the free section of helix is slightly less than the external diameter of the steel reinforced aluminium conductor that will connect, and the hand of spiral of free section is identical with the hand of spiral of twisted wire to be connected.

2. steel reinforced aluminium conductor as claimed in claim 1 is characterized in that with preformed pair of strain clamp the preformed armor rods in one of described two preformed armor rods groups is the aluminium alloy preformed armor rods, and the preformed armor rods in another preformed armor rods group is an aluminium Baogang preformed armor rods.

3. steel reinforced aluminium conductor as claimed in claim 1 is characterized in that with preformed pair of strain clamp the inner surface of described two groups of preformed armor rodses all is bonded with a layer of sand.