CN203004271U

CN203004271U - Mould for high-voltage cross-linked power cable tube-extruded type sheath

Info

Publication number: CN203004271U
Application number: CN2012206878251U
Authority: CN
Inventors: 魏永乾; 杨学民
Original assignee: LANZHOU ZHONGBANG GROUP CO Ltd
Current assignee: LANZHOU ZHONGBANG GROUP CO Ltd
Priority date: 2012-12-13
Filing date: 2012-12-13
Publication date: 2013-06-19
Anticipated expiration: 2022-12-13

Abstract

The utility model relates to a tool for manufacturing a high-voltage cross-linked power cable, which is an improvement for a production and extrusion mould for a high-voltage large-section cross-linked power cable sheath; and the utility model particularly relates to a mould for a high-voltage cross-linked power cable tube-extruded type sheath. The mould comprises a mould core and a mould sleeve, and is characterized in that a step section which extends outwards is arranged outside the outlet end of the sizing area of the mould core; the thickness of the outlet section of the sizing area of the mould core is 5.5mm, and the length of the sizing area of the mould core is equal to the result of multiplying the diameter of the sizing area by 0.5, and then adding plus 5-8mm; the sizing area of the mould core of the mould is used as a support point for a cable core, and forms three-point support with well-shaped frames in front and behind the head of a machine; and because the area after the cable core exits the sizing area is stepped, the inner wall opening of the mould core cannot be scrapped by the cable core while passing through, so that the cable core horizontally passes through an annular rubber flow between the mould core and the mould sleeve, and rubber is uniformly extruded on the surface of the cable core, thus saving eccentric adjustment time and effectively solving the eccentric phenomenon of the sheath existing during extrusion for the cable sheath, and then ensuring the roundness of the cable after extrusion and the uniform thickness of the sheath after extrusion.

Description

High voltage cross-linking power cable squeezes tubular type sheath mould

Technical field

The utility model relates to a kind of instrument of making high voltage cross-linking power cable, is to high pressure heavy in section (1600mm ²And more than) the cross-linked power cable sheath produces the improvement of extrusion die, specifically a kind of high voltage cross-linking power cable squeezes tubular type sheath mould.

Background technology

In recent years, along with the quickening of China's power grid construction, the raising of transmission line of electricity electric pressure, the demand of 110kV and above high voltage power cable increases rapidly, and high-tension cable has become the Hot events that each cable enterprise falls over each other to compete at present.My company begins to research and develop YJLW02-64/110kV 1600mm 2012 beginning of the years ²Cross-linking polytene insulation welded corrugated aluminium sheath polyvinyl chloride boot power cable, technological difficulties appear in the sheathing operation outside, as shown in Figure 2: the mould phenomenon appears scraping in the core 3 that passes through from below mould gum outlet 4, cable roundness after causing extruding is relatively poor, the sheath uneven distribution, the cable of extruding is flat-shaped, and namely scraping the mould place in cable cross-section is flat, causes sheath mean value, the thinnest point all not up to standard.Eccentric adjustment by repeatedly can't improve this phenomenon all the time, and we manage again to increase the well cabinet frame from school mould, head again and improve to measures such as adjusting unwinding direction, but effect is all not obvious, and final decision is taked the mould transformation.

Usually power cable outside during sheathing mould select and be tubular molding tool, it is simple to operate when this mould is produced cable, eccentric adjusting is easy, gel quantity is determined by the annular cross-sectional area between core rod 2 and die sleeve 1, as shown in Figure 1: when core 3 levels are passed through core rod 2, the core sheath degree of eccentricity of extruding is better, and the cable outward appearance is rounding comparatively.

The 1600mm of my company's trial-production ²It is 107mm that heavy in section 110kV high-tension cable is extruded front external diameter, and weight is 14.24kg/m approximately.Because of core itself heavier, the well cabinet frame of depending merely on the forward and backward setting of extruder head can't be adjusted to core the core rod center, because only having former and later two well cabinet frames of head, the core that passes through does the strong point, mid portion in head is without the strong point, core under gravity is attached to the core rod mouth all the time, can't level pass through core rod.Therefore we consider only to increase a strong point in mould, make the core level by core rod, can prevent that just core from scraping mould.

As shown in Figure 3: at first we designed small mould core 5, referring to Fig. 4, small mould core is inserted in core rod inner conical surface 201 and core rod pipe diameter region 204, form mould in mould, think that small mould core plays the effect of supporting core, only can scrape mould forward along small mould core sizing area 501 when core during by core rod, and can not touch the pipe bearing line area of core rod, imagination can solve core and scrape the mould phenomenon.Through test, effect is also not obvious, still exists core to scrape mould when sheathing.We carry out multianalysis to cable and mould afterwards, think that there is following problem in small mould core as the strong point:

1, small mould core coordinate with core rod not tight, only fixing in core rod sizing area fixed point after small mould core is inserted in core rod inner conical surface and sizing area, have the gap between small mould core and core rod inner conical surface;

2, the small mould core wall thickness is thinner, and because the outside dimension of core itself is larger, and small mould core has inner conical surface and the sizing area that must be inserted in core rod, therefore the small mould core wall thickness of making only has 2～3mm.

Heavier because of core itself, small mould core is too thin and can't well play the effect of supporting core, and we sum up the experience of front, rethink design, the structure of core rod is improved, small mould core and core rod are made into one, thickening core rod sizing area is revised core rod, die sleeve Outside Dimensions; It is good that cable is extruded rear roundness, and sheath is even.

The utility model content

The technical problems to be solved in the utility model be to provide a kind of sheath evenly, cable extrudes the good high voltage cross-linking power cable of rear roundness and squeezes tubular type sheath mould; This mould is used for high pressure heavy in section (1600mm ²And more than) production of cross-linked power cable sheathing.

It is as follows that the utility model solves the problems of the technologies described above the technical scheme of taking: a kind of high voltage cross-linking power cable squeezes tubular type sheath mould, comprises core rod, die sleeve; It is characterized in that: core rod sizing area port of export peripheral hardware has abducent stepped portion.

The thickness of core rod sizing area outlet section is 5.5～6 millimeters; Core rod sizing area length is 0.5* core rod sizing area diameter+5～8 millimeters, and core rod sizing area length is that core rod sizing area radius adds 5～8 millimeters in other words.

The utility model is to high pressure heavy in section (1600mm ²And more than) the cross-linked power cable sheath produces the improvement of extrusion die, the utility model core rod sizing area port of export is provided with abducent stepped portion, soon the core rod pipe holds the line segment inwall and is designed to stepped ramp type, and adjusts core rod mouth of pipe size, sizing length and thickness; With the strong point of core rod sizing area as core, the well cabinet frame forward and backward with head forms supported at three point jointly.Only can scrape mould at the core rod sizing area when core during by core rod, the zone that core goes out after sizing area is step-like, core by the time can't scrape core rod inwall mouth, make the core level by the annular solation between core rod and die sleeve, the glue amount is extruded in the core surface equably, has saved the eccentric time, the sheath eccentric phenomena that exists when efficiently solving cable cover(ing) and extruding, thereby guarantee that cable extrudes rear roundness, extrude rear jacket thickness even.

According to the design that the utility model provides, we have carried out sheath trial-production, and product is once trial-produceed successfully, scrape mould though core still has during by core rod, extrude rear jacket thickness even, have solved the sheath eccentric phenomena, and it is good that cable is extruded rear roundness.Testing result sees Table 1.

Table 1 Lanzhou electric wire Group Co.,Ltd of many nations survey report

Reach a conclusion from above data, this utility model mould can effectively solve the problems such as mould, sheath bias of scraping that electric cable with large cross-section exists because self is heavier, greatly saves the eccentric time, reduces and extrudes waste material, thereby enhance productivity, and reduces manufacturing cost; Up to now, the 1600mm of my company's production ²By State Grid Corporation of China's power industry electrical equipment type inspection, properties meets GB/T 11017-2002, IEC 60840:2011 standard-required to the 110kV high-pressure cross-linking cable fully smoothly.

Description of drawings

Fig. 1 is that the core level is passed through the core rod schematic diagram,

Fig. 2 is that core is scraped the mould schematic diagram,

Fig. 3 is the small mould core schematic diagram,

Fig. 4 is that small mould core coordinates schematic diagram with core rod,

Fig. 5 is core rod schematic diagram of the present utility model,

Fig. 6 is A section enlarged drawing in Fig. 5,

Fig. 7 is the utility model core rod result of use figure.

In figure: the 1-die sleeve, the 2-core rod, 201-core rod inner conical surface, 202-core rod sizing area, the 203-stepped portion, 204-core rod pipe diameter region,

Mould gum outlet below 3-core, 4-, 5-small mould core, 501-small mould core sizing area, the thickness of M-core rod sizing area outlet section, L-core rod sizing area length, D-core rod sizing area diameter.

The specific embodiment

As Fig. 5 and shown in Figure 6: the high voltage cross-linking power cable that the utility model provides squeezes tubular type sheath mould, comprises core rod 2, die sleeve 1; Core rod sizing area 202 port of export peripheral hardwares have abducent stepped portion 203.The thickness M of core rod sizing area outlet section is 5.5 millimeters, and core rod sizing area length L is 0.5* core rod sizing area diameter D+8 millimeter.This mould is used for high pressure heavy in section (1600mm ²And more than) production of cross-linked power cable sheathing, referring to Fig. 7, the zone that goes out after sizing area due to core 3 is step-like, core by the time can't scrape core rod inwall mouth, make the core level by the annular solation between core rod and die sleeve, the glue amount is extruded in the core surface equably, thereby has eliminated the sheath eccentric phenomena, and it is good that cable is extruded rear roundness.

Claims

1. a high voltage cross-linking power cable squeezes tubular type sheath mould, comprises core rod, die sleeve; It is characterized in that: core rod sizing area (202) port of export peripheral hardware has abducent stepped portion (203).

2. a kind of high voltage cross-linking power cable as claimed in claim 1 squeezes tubular type sheath mould, and it is characterized in that: the thickness (M) of core rod sizing area outlet section is 5.5～6 millimeters, and core rod sizing area length (L) is 0.5* sizing area diameter (D)+5～8 millimeter.