CN205666599U - Cable termination major insulation - Google Patents

Abstract

The utility model discloses a cable termination major insulation, its technical scheme main points are cable termination major insulation, including main insulator, injection moulding's main insulator including the cylindric extension of the one -tenth that sets gradually, along with keeping away from the extension the crescent expansion portion of external diameter, with the thickening portion of the expansion maximum diameter of portion unanimity and the choke that the external diameter reduces gradually along with keeping away from thickening portion, expansion portion all becomes the round platform with the choke and describes, open along the axial at main insulator center has the through -hole that supplies cable penetration, and the gomphosis has a stress cone that lies in thickening portion and choke in the main insulator, and the stress cone lower extreme made by conducting material is tubulose and internal diameter and through -hole unanimously, and the horn mouth that formation was wrapped up by thickening portion is outwards extended to the upper end, the reasonable effect of wall thickness has been reached.

Description

Cable termination major insulation

Technical field

This utility model relates to a kind of cold events cable accessory, particularly to a kind of cable termination major insulation.

Background technology

Cable termination major insulation is to utilize elastomeric material to inject sulfidization molding in factory, then through expanding, be lined with plastics Spiral support thing constitutes the parts of various cable accessories.During in-site installation, these predilation parts are enclosed within electricity after treatment Cable end or joint, extract the plastic spiral bar (supporter) of inner support out, be pressed on the cable constituted on cable insulation Adnexa.Because cable termination major insulation is at normal temperatures by elastic recovery force rather than as thermal contraction cable accessory fire adds Thermal contraction, therefore this it is commonly called as cold events cable accessory by the cable accessory of elastic recovery force at normal temperatures.

Existing cable termination major insulation refers to the Chinese patent of Application No. 201520059403.3, it discloses one Planting cold-shrinkable terminal, including hollow insulation tube body, described hollow insulation tube body one end inwall is embedded with stress cone, and described hollow is exhausted It is provided with full skirt outside edge tube body, states the insulation tube body inwall near both ends and be provided with the cannelure of indent.

But the cannelure of indent reduces the wall thickness of cable termination, and cannelure is positioned in hollow insulating body two End, and hollow insulating body two ends are the place that electric field is concentrated, relatively thin wall thickness causes hollow insulating body to be more prone to be hit Wear, affect the performance of cable termination and safe shape.

Utility model content

The purpose of this utility model is to provide a kind of wall thickness rational cable termination major insulation.

Above-mentioned technical purpose of the present utility model has the technical scheme that

A kind of cable termination major insulation, including major insulation body, the major insulation body of injection mo(u)lding includes setting gradually Add consistent with enlarged portion maximum gauge of enlarged portion become columned extension, being gradually increased with the external diameter away from extension Thickness portion and the choke being gradually reduced with the external diameter away from thickening part, enlarged portion all becomes round table-like with choke；Major insulation is originally Body is centrally along axially having the through hole that current supply cable runs through, and chimeric in major insulation body have the stress being positioned at thickening part and choke Cone, the stress cone lower end being made of an electrically conducting material is in a tubular form and internal diameter is consistent with through hole, and the upper end formation that stretches out is thickened portion The horn mouth of parcel.

By using such scheme, extension ensures the fitting area of major insulation inner body wall and cable, it is ensured that major insulation Body fits tightly with cable, and enlarged portion, thickening part and choke wall thickness increase, enough in order to ensure that major insulation body has Wall thickness by electric field concentration produce pollution flashover and puncture；The upper end of enlarged portion is less with the lower end diameter of choke, in order to save Material saving, reduces the cost of major insulation body；Stress cone lower end is wrapped on cable, and the horn mouth of upper end will effectively control electricity The axial field intensity of cable body insulation end, stress cone is to fill insulation and the interface of cable body insulation in joint, and this is handed over Interface is the weak link of cable connector, it is ensured that the safety of cable termination major insulation.

It is also preferred that the left extension and enlarged portion are disposed radially is extended with multiple full skirt.

By using such scheme, full skirt reduces the attached dirty amount of major insulation body, also increases creepage spacing simultaneously, anti- Only major insulation body punctures because of pollution flashover.

It is also preferred that the left full skirt includes spaced the first full skirt being relatively large in diameter and less the second full skirt of diameter.

By using such scheme, spaced first full skirt and the second full skirt, prevent following situation: when rainwater will be led Electricity dunghill makes along full skirt is dirty, is coupled together by adjacent full skirt, affects the ability of the antifouling work of full skirt；And diameter is different First and second full skirt the most effectively avoids this circumstances, it is ensured that the antifouling work ability of full skirt.

It is also preferred that the left there is arc shape in full skirt cross section.

By using such scheme, the full skirt of the curved shape in cross section on the one hand upper surface becomes arc-shaped, it is simple to dirt is along umbrella Skirt upper surface landing, prevents from accumulating too much dirt；And lower surface becomes plane, it is ensured that full skirt and major insulation body stable connection, long Time use after, prevent upper strata full skirt tilt and cannot for major insulation body antifouling.

It is also preferred that the left the full skirt of bottom is positioned at enlarged portion near side, thickening part.

By using such scheme, it is ensured that whole major insulation body can be covered by full skirt, prevent the dirt dropped in top Thing, and the choke external diameter below full skirt is gradually reduced, can the enlarged portion full skirt near side, thickening part is limited keeps with being positioned at Protect, it is not necessary to separately add full skirt, save the manufacturing cost of major insulation body.

It is also preferred that the left the full skirt of the top is the first full skirt.

By using such scheme, the full skirt gone up most is relatively large in diameter, can effectively protect lower section major insulation body and Other full skirt, prevents them from accumulating dirt.

The multiple waterproof rings of formation it is also preferred that the left extension upper end stretches out.

By using such scheme, waterproof ring and the cold shrink sleeve compact siro spinning technology being wrapped in extension end, reduce both Gap, prevent steam from entering.

The edge it is also preferred that the left choke lower end stretches out.

By use such scheme, edge thicken choke edge thickness, prevent choke edge transport, install During damaged.

It is also preferred that the left through-hole wall abuts the bolt support pipe making major insulation body keep expansion.

By using such scheme, bolt support pipe is made up of interior lead-in spiral winding, and the side of interior lead-in has hook Portion, opposite side has groove, in the groove of the interior lead-in that the hook portion on the interior lead-in of next circle to clamp-on a circle, when seated, will Major insulation body is set on cable, is pulled open bolt support pipe one end, makes the hook portion on next interior lead-in enclosed depart from upper one The groove of the interior lead-in of circle, thus bolt support pipe is decomposed back into strip and is drawn out of, and major insulation body automatic rebounding is also Being coated on cable, site operation is quick and easy.

It is also preferred that the left major insulation body is made up of electrically insulating silicone rubber, stress cone is made up of conductive silicon rubber.

By using such scheme, silicone rubber has good insulativity and hydrophobicity, and limited prevents pollution flashover, Er Qie electricity Trace and corrosion resistance are extremely strong, and electrical property is strong.

In sum, this utility model has the advantages that by rationally arranging wall thickness, is ensureing cable termination master On the premise of insulation, save the manufacture material of cable termination major insulation, thus cost-effective；The full skirt that size is arranged alternately, protects Card stain resistance.

Accompanying drawing explanation

Fig. 1 is cable termination major insulation external structure schematic diagram；

Fig. 2 is cable termination major insulation internal structure schematic diagram；

Fig. 3 is that cable termination major insulation expands schematic diagram.

In figure, 1, major insulation body；11, extension；12, enlarged portion；13, thickening part；14, choke；15, through hole；2、 Full skirt；21, the first full skirt；22, the second full skirt；3, stress cone；31, horn mouth；4, waterproof ring；5, edge；6, bolt support pipe.

Detailed description of the invention

Below in conjunction with accompanying drawing, this utility model is described in further detail.The most identical parts are with identical accompanying drawing Labelling represents.It should be noted that the word "front", "rear" used in describing below, "left", "right", "up" and "down" refer to Being the direction in accompanying drawing, word " bottom surface " and " end face ", " interior " and " outward " refer respectively to towards or away from particular elements geometry The direction at center.

As depicted in figs. 1 and 2, a kind of cable termination major insulation, including major insulation body 1, major insulation body 1 passes through flat board Vulcanizer one gas injection mo(u)lding；Major insulation body 1 is vertically-mounted, is followed successively by into columned extension 11 from top to bottom, with far Thickening part 13 that the enlarged portion 12 that external diameter is gradually increased from extension 11 is consistent with enlarged portion 12 maximum gauge and with away from Thickening part 13 and choke 14 that external diameter is gradually reduced, enlarged portion 12 all becomes round table-like with choke 14, extension 11, enlarged portion 12, thickening part 13 and choke 14 are coaxially disposed and extension 11 end face and enlarged portion 12 end face, thickening part 13 end face and reducing Portion 14 end face is completely the same, so that continuous, without corner angle between major insulation body 1 various piece.

Extension 11 upper end is formed with three waterproof rings 4, and waterproof ring 4 is in circular and coaxially set with major insulation body 1 Putting, wherein the waterproof ring 4 of the top is positioned at the end of extension 11.

Below waterproof ring 4, extension 11 and enlarged portion 12 are disposed radially and are extended with full skirt 2, and there is arc in full skirt 2 cross section Shape and full skirt 2 are coaxially disposed with major insulation body 1；Full skirt 2 is different according to diameter, is divided into the first full skirt 21 being relatively large in diameter with straight The second full skirt 22 that footpath is less, the first full skirt 21 and the second full skirt 22 are one group and along extension 11 and enlarged portion 12 the most uniformly Arrange five groups；In each group, the first full skirt 21 is positioned at the top of the second full skirt 22；And the second full skirt 22 of bottom is positioned at expansion Portion 12 is on the edge of side, thickening part 13.

As it is shown on figure 3, major insulation body 1 is centrally along axially having the through hole 15 that current supply cable runs through；In thickening part 13 and contracting In oral area 14, chimeric in major insulation body 1 have stress cone 3, and stress cone 3 lower end is in a tubular form and internal diameter is consistent with through hole 15, upper end Stretch out and form the horn mouth 31 being thickened portion 13 parcel；Through hole 15 inwall abuts to have and makes major insulation body 1 keep expansion Bolt support pipe 6, bolt support pipe 6 is made up of interior lead-in spiral winding, and the side of interior lead-in has hook portion, and opposite side has Groove, in the groove of the interior lead-in that the hook portion on the interior lead-in of next circle to clamp-on a circle.

Choke 14 lower end stretches out edge 5, and edge 5 is also in circular and be coaxially disposed with major insulation body 1.

General major insulation body 1 is made up of electrically insulating silicone rubber, and stress cone 3 is made up of conductive silicon rubber.

This specific embodiment is only that it is not to restriction of the present utility model, ability to explanation of the present utility model The present embodiment can be made after reading this specification by field technique personnel as required does not has the amendment of creative contribution, but As long as all being protected by Patent Law in right of the present utility model.

Claims (10)

1. a cable termination major insulation, including major insulation body (1), it is characterised in that: the major insulation body (1) of injection mo(u)lding Including the columned extension of the one-tenth set gradually (11), with the enlarged portion that external diameter is gradually increased away from extension (11) (12) consistent with enlarged portion (12) maximum gauge thickening part (13) and with away from thickening part (13) what external diameter was gradually reduced Choke (14), enlarged portion (12) all becomes round table-like with choke (14)；Major insulation body (1) is centrally along axially having current supply cable The through hole (15) run through；Chimeric in major insulation body (1) have the stress cone (3) being positioned at thickening part (13) and choke (14), Stress cone (3) lower end being made of an electrically conducting material is in a tubular form and internal diameter is consistent with through hole (15), and upper end stretches out to be formed and added The horn mouth (31) that thickness portion (13) wraps up.

Cable termination major insulation the most according to claim 1, it is characterised in that: extension (11) and enlarged portion (12) are along footpath It is extended with multiple full skirt (2) to setting.

Cable termination major insulation the most according to claim 2, it is characterised in that: full skirt (2) includes spaced diameter Bigger the first full skirt (21) and less the second full skirt (22) of diameter.

Cable termination major insulation the most according to claim 3, it is characterised in that: there is arc shape in full skirt (2) cross section.

Cable termination major insulation the most according to claim 4, it is characterised in that: the full skirt (2) of bottom is positioned at enlarged portion (12) near thickening part (13) side.

Cable termination major insulation the most according to claim 5, it is characterised in that: the full skirt (2) of the top is the first full skirt (21)。

Cable termination major insulation the most according to claim 1, it is characterised in that: extension (11) upper end stretches out shape Become multiple waterproof ring (4).

Cable termination major insulation the most according to claim 1, it is characterised in that: choke (14) lower end stretches out edge (5)。

Cable termination major insulation the most according to claim 1, it is characterised in that: through hole (15) inwall abuts and makes major insulation Body (1) keeps the bolt support pipe (6) of expansion.

Cable termination major insulation the most according to claim 1, it is characterised in that: major insulation body (1) is by electrically insulating silicone rubber Making, stress cone (3) is made up of conductive silicon rubber.