CN103354339A - Expansive force terminal strain clamp of composite core aluminum-stranded conductor - Google Patents

Abstract

The invention relates to an expansive force terminal strain clamp of a composite core aluminum-stranded conductor. The strain clamp is composed of a spinning type steel anchor, a strain casing tube, a tension clamp core, a strain clamp sleeve, an inner liner tube, a lead core, a drainage board, a silica gel pad, a compressing point, and an exploding pressing point. The tension clamp core is sleeved in the strain clamp sleeve and is arranged at the middle section of the strain casing tube. The front end of the spinning type steel anchor is contacted with the strain clamp sleeve and is fixed with the strain casing tube by a threaded connecting way; and the silica gel pad is arranged at the joint position for sealing. The front end of the strain clamp sleeve is arranged at the exploding pressing point; the inner liner tube is arranged in the front end of the strain casing tube and is compressed and fixed by the compressing point. The advantages of the strain clamp are as follows: the streamline design of the drainage board enables a discharging phenomenon to be alleviated and thus the energy consumption is reduced; a peripheral line is arranged at the outer surface of the inner liner tube and thus the friction force between the inner liner tube and the strain casing tube is increased, thereby improving the stability; and because of arrangement of the compressing point, the tension clamp core can generate a stable radial pressure and generate great gripping power. Moreover, the provided strain clamp has the characteristics of simple structure, convenient installation, and obvious effect.

Description

Compound Core Aluminium Strand Cable Expanding Terminal Dead-end Clamp

Technical field

The present invention relates to fixing, the clamping connector of composite core power cable aluminium stranded conductor in a kind of high pressure overhead power line, exactly, disclose a kind of NEW TYPE OF COMPOSITE core aluminum stranded wire expansive force terminal strain clamp.

Background technology

At present, domestic transmission line connecting clamp, its device of fixing, clamping steel reinforced aluminium conductor mainly contains three kinds, and a kind of is that wire is pegged graft, and the less grafting of contact-making surface is not firm, and wire generates heat easily; The 2nd, aluminum pipe hydraulic pressure, the two ends wire inserts aluminum pipe during installation, and then with the hydraulic tool pressurization, but contact-making surface is less, and grip is not strong; The 3rd, explosion crimping makes wire clamp clamp wire by the powerful impulsive force of the moment of detonating, but because powerful impulsive force changes metallographic, mechanical strength reduces, and it is dangerous to explode.Therefore, the connecting clamp that uses on the present domestic transmission line all exists installs inconvenient, the defectives such as contact-making surface is little, wire easily generates heat, grip deficiency, mechanical strength reduction, and fixing, the clamping that can not be suitable for the new material composite core aluminum stranded wire connect.The patent No. is 2007200347845 utility model patent, more above-mentioned problems have been overcome technically, particularly for core clamping aspect, this technology adopts spinning clamping method to strengthen the grip force of tension force sandwich to core, it is very convenient to install, can reuse, but part yet comes with some shortcomings, for example: internal lining pipe is after installing extruding, the tightly fixing skin of composite core aluminum stranded wire, make wire and strain insulator chuck, the position of tension force sandwich (or distance) is relatively stable, but because the outer wall of internal lining pipe and the inwall of strain insulator sleeve pipe all are sawtooth design, coefficient of friction between internal lining pipe and the strain insulator sleeve pipe is lower, in a long time, wire is at self pulling force, under convergent force (ambient temperature effect) or the wind-force effect, cause that easily the strain insulator sleeve pipe reduces the grip of internal lining pipe, cause this device to lose due effect, even because the contact-making surface of internal lining pipe and strain insulator sleeve pipe is suddenly big or suddenly small, and whole outside of deivce corner angle are too many, be easy to produce electric discharge phenomena, cause on firely, bring great loss to power supply facilities, the normal normal productive life of impact.

Summary of the invention

Compound Core Aluminium Strand Cable Expanding Terminal Dead-end Clamp, exactly for addressing the above problem, and a kind of new technique disclosed, the present invention by: rotary extrusion type spinning steel anchor (1), strain insulator sleeve pipe (2), tension force sandwich (3), strain insulator chuck (4), internal lining pipe (5), wire core (6), drainage plate (7), silicagel pad (8), crimping point (9), detonation pressure point (10) consist of; Rotary extrusion type spinning steel anchor (1) front end arranges various outer diameter two-stage screw thread, wherein the one-level major diameter of thread is greater than the secondary major diameter of thread, the rear end internal thread of one-level screw thread and strain insulator sleeve pipe (2) is complementary, be set to radially fillet square body between one-level screw thread and the secondary screw thread, the large end internal thread of secondary screw thread and strain insulator chuck (4) is complementary, secondary screw thread front end arranges the top, its diameter is identical with the outside diameter of tension force sandwich (3), the rear end of rotary extrusion type spinning steel anchor (1) radially arranges " U " type plate body, in " U " type plate body elliptical aperture is set, " U " type plate body and one-level screw thread, the secondary screw thread, fillet square body radially, come directly towards all one-body molded; Strain insulator sleeve pipe (2) is the tubular body that together directly connects, this tubular body front end arc is containing, the rear port outer rim is opened outward and is formed the drainage plate (7) that is " U " type, the curved portions of drainage plate (7) is semicircle, its center of circle overlaps with the axial line of strain insulator sleeve pipe (2), the half-round plate face of drainage plate (7) is vertical with the axial line of strain insulator sleeve pipe (2), the square department of drainage plate (7) is to the rear end perk of strain insulator sleeve pipe (2), form 150～160 degree angles with half-round plate face, the square department plate face symmetry of drainage plate (7) arranges four screws, and drainage plate (7) is one-body molded with strain insulator sleeve pipe (2); Tension force sandwich (3) is the taper body, its internal diameter from fine to coarse, tension force sandwich (3) is complementary with strain insulator chuck (4), strain insulator chuck (4) external diameter and strain insulator sleeve pipe (2) internal diameter are complementary, strain insulator chuck (4) leading section setting inside contracts step, rear port arranges internal thread, and the secondary screw thread of this internal thread and rotary extrusion type spinning steel anchor (1) is complementary; Internal lining pipe (5) external diameter and strain insulator sleeve pipe (2) internal diameter are complementary, and its internal diameter and wire are complementary; Composite core aluminum stranded wire passes internal lining pipe (5) and penetrates strain insulator sleeve pipe (2) again, divest the composite core aluminum stranded wire skin and expose wire core (6), wire core (6) is passed strain insulator chuck (4) penetrate again tension force sandwich (3), rotary extrusion type spinning steel anchor (1) secondary screw thread be spirally connected with strain insulator chuck (4), compress tension force sandwich (3), tension force sandwich (3) produces grip to wire core (6) under the effect of strain insulator chuck (4), fix wire, rotary extrusion type spinning steel anchor (1) is pushed forward into strain insulator sleeve pipe (2) and is spirally connected through the one-level screw thread and is fixed in the strain insulator sleeve pipe (2), rotary extrusion type spinning steel anchor (1) seals through silicagel pad (8) with strain insulator sleeve pipe (2) back end interface place, strain insulator chuck (4) is in the middle part of strain insulator sleeve pipe (2), it is fixing through detonation pressure point (10) that its front end inside contracts step, internal lining pipe (5) places the front end of strain insulator sleeve pipe (2) and part to stretch out strain insulator sleeve pipe (2) port, and is fixing through crimping point (9); It is characterized in that: the containing place of described strain insulator sleeve pipe (2) front end arc arranges crimping point (9), and strain insulator sleeve pipe (2) front end 1/3 place arranges detonation pressure point (10), and described drainage plate (7) edges and corners all are the R angle and arrange; Described internal lining pipe (5) outer surface arranges circumferential lines; Described tension force sandwich (3) is relatively radially divided equally 180 degree and is cut out the clearance groove that does not open at two ends from two ends, two cut surfaces of its clearance groove are mutually vertical.

The invention has the advantages that: 1. the airflow design of drainage plate has reduced the electric discharge phenomena of this device, reduces energy consumption; 2. because the internal lining pipe appearance arranges circumferential lines, increase the frictional force between internal lining pipe and the strain insulator sleeve pipe, after rotary extrusion type spinning steel anchor and strain insulator chuck, tension force sandwich, each assembly of strain insulator sleeve pipe are assembled, pushed crimping point secure liner pipe, thus fixing cord; 3. the setting of detonation pressure point is better fixed the strain insulator chuck, under the pressure-acting that is spirally connected of rotary extrusion type spinning steel anchor and strain insulator sleeve pipe, the tension force sandwich is produced more stable radial pressure, thereby makes the tension force sandwich produce larger grip; 4. the present invention is simple in structure, and is easy for installation, and effect is more obvious.

Description of drawings

Referring to accompanying drawing, Fig. 1 is structural representation of the present invention;

Fig. 2 is that the A-A of Fig. 1 is to view;

Fig. 3 is rotary extrusion type spinning steel anchor structure schematic diagram;

Fig. 4 is the radially radial view of fillet square body of Fig. 3;

Fig. 5 is clips cored structure schematic diagram;

Fig. 6 is the large end radial view of Fig. 5;

Fig. 7 is the jacket structured schematic diagram of strain insulator;

Fig. 8 is strain insulator sleeve structure schematic diagram;

Fig. 9 is that the A-A of Fig. 8 is to view;

Figure 10 is that the B of Fig. 8 is to view;

Figure 11 is the internal lining pipe structural representation.

Embodiment

Below in conjunction with drawings and the specific embodiments, technical characterictic of the present invention is described further.

Referring to accompanying drawing 1～11, the present invention includes: rotary extrusion type spinning steel anchor (1), strain insulator sleeve pipe (2), tension force sandwich (3), strain insulator chuck (4), internal lining pipe (5), wire core (6), drainage plate (7), silicagel pad (8), crimping point (9), detonation pressure point (10); Tension force sandwich (3) is placed in the strain insulator chuck (4), be in the middle part of strain insulator sleeve pipe (2), rotary extrusion type spinning steel anchor (1) front end contacts with strain insulator chuck (4), and be spirally connected fixing with strain insulator sleeve pipe (2), seam crossing silicagel pad (8) sealing, strain insulator chuck (4) front end overhead is located in detonation pressure point (10), and internal lining pipe (5) places in the front end of strain insulator sleeve pipe (2), and fixes through crimping point (9) crimping.

Execution mode, composite core aluminum stranded wire is penetrated internal lining pipe (5), pass again strain insulator sleeve pipe (2), divest the composite core aluminum stranded wire skin, expose wire core (6), wire core (6) is run through strain insulator chuck (4), penetrate again tension force sandwich (3), and tension force sandwich (3) is placed in the strain insulator chuck (4), secondary screw thread and the strain insulator chuck (4) of rotary extrusion type spinning steel anchor (1) are spirally connected, radially push tension force sandwich (3), again rotary extrusion type spinning steel anchor (1) is continued to push strain insulator sleeve pipe (2), and be spirally connected fixingly with strain insulator sleeve pipe (2), and internal lining pipe (5) is in the strain insulator sleeve pipe front end, fixing to crimping point (9) and detonation pressure point (10) extruding at last.

Claims (1)

1. Compound Core Aluminium Strand Cable Expanding Terminal Dead-end Clamp, the present invention by: rotary extrusion type spinning steel anchor (1), strain insulator sleeve pipe (2), tension force sandwich (3), strain insulator chuck (4), internal lining pipe (5), wire core (6), drainage plate (7), silicagel pad (8), crimping point (9), detonation pressure point (10) consist of; Rotary extrusion type spinning steel anchor (1) front end arranges various outer diameter two-stage screw thread, wherein the one-level major diameter of thread is greater than the secondary major diameter of thread, the rear end internal thread of one-level screw thread and strain insulator sleeve pipe (2) is complementary, be set to radially fillet square body between one-level screw thread and the secondary screw thread, the large end internal thread of secondary screw thread and strain insulator chuck (4) is complementary, secondary screw thread front end arranges the top, its diameter is identical with the outside diameter of tension force sandwich (3), the rear end of rotary extrusion type spinning steel anchor (1) radially arranges " U " type plate body, in " U " type plate body elliptical aperture is set, " U " type plate body and one-level screw thread, the secondary screw thread, fillet square body radially, come directly towards all one-body molded; Strain insulator sleeve pipe (2) is the tubular body that together directly connects, this tubular body front end arc is containing, the rear port outer rim is opened outward and is formed the drainage plate (7) that is " U " type, the curved portions of drainage plate (7) is semicircle, its center of circle overlaps with the axial line of strain insulator sleeve pipe (2), the half-round plate face of drainage plate (7) is vertical with the axial line of strain insulator sleeve pipe (2), the square department of drainage plate (7) is to the rear end perk of strain insulator sleeve pipe (2), form 150～160 degree angles with half-round plate face, the square department plate face symmetry of drainage plate (7) arranges four screws, and drainage plate (7) is one-body molded with strain insulator sleeve pipe (2); Tension force sandwich (3) is the taper body, its internal diameter from fine to coarse, tension force sandwich (3) is complementary with strain insulator chuck (4), strain insulator chuck (4) external diameter and strain insulator sleeve pipe (2) internal diameter are complementary, strain insulator chuck (4) leading section setting inside contracts step, rear port arranges internal thread, and the secondary screw thread of this internal thread and rotary extrusion type spinning steel anchor (1) is complementary; Internal lining pipe (5) external diameter and strain insulator sleeve pipe (2) internal diameter are complementary, and its internal diameter and wire are complementary; Composite core aluminum stranded wire passes internal lining pipe (5) and penetrates strain insulator sleeve pipe (2) again, divest the composite core aluminum stranded wire skin and expose wire core (6), wire core (6) is passed strain insulator chuck (4) penetrate again tension force sandwich (3), rotary extrusion type spinning steel anchor (1) secondary screw thread be spirally connected with strain insulator chuck (4), compress tension force sandwich (3), tension force sandwich (3) produces grip to wire core (6) under the effect of strain insulator chuck (4), fix wire, rotary extrusion type spinning steel anchor (1) is pushed forward into strain insulator sleeve pipe (2) and is spirally connected through the one-level screw thread and is fixed in the strain insulator sleeve pipe (2), rotary extrusion type spinning steel anchor (1) seals through silicagel pad (8) with strain insulator sleeve pipe (2) back end interface place, strain insulator chuck (4) is in the middle part of strain insulator sleeve pipe (2), it is fixing through detonation pressure point (10) that its front end inside contracts step, internal lining pipe (5) places the front end of strain insulator sleeve pipe (2) and part to stretch out strain insulator sleeve pipe (2) port, and is fixing through crimping point (9); It is characterized in that: the containing place of described strain insulator sleeve pipe (2) front end arc arranges crimping point (9), and strain insulator sleeve pipe (2) front end 1/3 place arranges detonation pressure point (10), and described drainage plate (7) edges and corners all are the R angle and arrange; Described internal lining pipe (5) outer surface arranges circumferential lines; Described tension force sandwich (3) is relatively radially divided equally 180 degree and is cut out the clearance groove that does not open at two ends from two ends, two cut surfaces of its clearance groove are mutually vertical.

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