CN201690194U - Integrated prefabricated joint of power cable of 500kV and above - Google Patents
Integrated prefabricated joint of power cable of 500kV and above Download PDFInfo
- Publication number
- CN201690194U CN201690194U CN2010202138598U CN201020213859U CN201690194U CN 201690194 U CN201690194 U CN 201690194U CN 2010202138598 U CN2010202138598 U CN 2010202138598U CN 201020213859 U CN201020213859 U CN 201020213859U CN 201690194 U CN201690194 U CN 201690194U
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- insulating part
- integral prefabricated
- power cable
- integrated prefabricated
- prefabricated insulating
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Abstract
The utility model relates to a cable accessory in the field of power cable transmission systems, in particular to an integrated prefabricated joint of a power cable of 500kV and above. The prefabricated joint comprises an integrated prefabricated insulating piece (1), a sealant (2), a metal protection cover (3) and a conductor connecting piece (4), wherein the integrated prefabricated insulating piece (1) is arranged outside the conductor connecting piece (4); the sealant (2) is arranged outside the integrated prefabricated insulating piece (1); the metal protection cover (3) is arranged outside the sealant (2); and the integrated prefabricated insulating piece (1) comprises a stress cone (1-1), a shielding pipe (1-2), an insulating piece (1-3) and an outer shield (1-4), and is made form liquid silicon rubber. The integrated prefabricated joint has the benefits of: (1) stable and reliable performance, high rate of finished products and low comprehensive cost; (2) simple fabrication process, easy fabrication and low fabrication cost; and (3) good product quality.
Description
Technical field
The utility model relates to the electric cable accessories in a kind of power cable transmission system field, the integral prefabricated type joint of particularly a kind of 500kV and the above power cable of 500kV.
Background technology
At present, in the power cable transmission system of 500kV and the above electric pressure of 500kV, cable mostly is power cable with cross-linked polyethylene insulation, and joint is used for being connected between power cable with cross-linked polyethylene insulation and the cable, in order to realize the transmission of electric energy.Construction along with large hydropower station, hydroenergy storage station, extra-high voltage grid, the use amount of joint is increasing, in 500kV and the power cable connected system more than the 500kV, joint is the weakest link, break down easily, its failure rate accounts for more than 70% of whole cable connected system, and the reliability of joint directly has influence on the reliability of transmission system.Joint is divided into insulating joint and straight coupling according to the difference that is electrically connected form, and these two kinds of joints are referred to as joint, are also referred to as transition joint.
At the joint that is used for 500kV and the above power cable of 500kV, a kind of is combination prefabrication type joint, be to adopt prefabricated rubber stress cone and the field-installed joint of prefabricated epoxy insulator, because its manufacturing process complexity, on-the-spot that environmental requirement loaded down with trivial details, the erecting bed is installed is high, and in a single day product or cable go wrong, and product is repaired difficulty, surpasses for two weeks repair time, can't satisfy the service requirement of electrical network, the less use of present this combination prefabrication type joint.Another kind of 500kV and the above power cable connector of 500kV that generally uses at present is integral prefabricated type joint, and integral prefabricated insulating part adopts the structural shape of single prefabricated rubber-covered.The joint of this structure; it comprises integral prefabricated insulating part, fluid sealant, metal coating shell and conductor adapting piece; integral prefabricated insulating part includes stress cone, shielded-plate tube, insulating part and external shield, and integral prefabricated insulating part is made by ethylene propylene diene monomer (EPDM) material.Integral prefabricated insulating part plays control electric field and insulating effect, is the critical component of integral prefabricated type joint, and integral prefabricated insulating part outside is a fluid sealant, and fluid sealant is outside for the metal coating shell, shields.Cable mainly comprises conductor and insulator, and during installation, the conductor adapting piece of the conductor dbus that needs stube cable being crossed the metal making is connected.Because the integral prefabricated insulating part of this integral prefabricated type joint is made by ethylene propylene diene monomer (EPDM) material, therefore 500kV and the integral prefabricated type joint of the above power cable of 500kV exist following defective at present:
(1) quality of materials of the integral prefabricated insulating part of making is difficult to control, the material ethylene propylene diene rubber of integral prefabricated insulating part mainly is the terpolymer of ethene, propylene and non-conjugated diene hydrocarbon, have multiple additives to add in the process of mixing, the prescription complexity is difficult to the control material quality; The viscosity of material height, moulding process is poor, and the rate of finished products of integral prefabricated insulating part has only about 60%.
(2) complex manufacturing technology, the former pressure of processing prefabricated insulating part needs is big, bulky, production cost height.When ethylene propylene diene monomer (EPDM) material is processed into integral prefabricated insulating part, employed equipment is annotated rubber machine structure referring to shown in Figure 3, during making the material ethylene propylene diene rubber is placed in the barrel 21, be expelled in the mould 23 by injection mechanism 22, mould 23 is made up of the mold 23-1 and the bed die 23-2 of mutual coupling, and heating back material sulfidization molding in mold cavity is integral prefabricated insulating part.Because the viscosity of ethylene propylene diene rubber after plasticizing is very high, and it is mobile poor, be injected into die cavity, need tens pressure, die cavity and equipment need bear very high pressure in the injection process, because the mould volume is very big, need the special special use of large-tonnage large-scale notes rubber machine and large mold just can annotate the rubber moulding, and used material wants a shot to finish, therefore produce the integral prefabricated insulating part of 500kV and the integral prefabricated type joint of the above power cable of 500kV, the notes rubber machine tonnage that needs reaches more than 1600 tons, the single injecting glue reaches more than 80 liters and just can meet the demands, such equipment volume is big, the equipment cost height, and increasing of equipment cost causes whole cost of manufacture high.
(3) because ethylene propylene diene rubber has higher hardness, Shao Shi A60～70, poor with the stickiness of cable surface, cause the installation difficulty of product and the increase of hazard rate, the aging back of the watertight aircase that ethylene-propylene-diene monomer is handed over mechanical performance (aging condition: 135 ℃ ± 3 ℃, 7d), compression set≤15～25%, tensile strength rate of change≤20～30%, the rate of change of percentage elongation≤20～30%, material ageing resistance, heat-resisting quantity relatively poor, product will move under≤100 ℃ of environmental conditions, use is restricted, narrow application range.
Though the integral prefabricated type joint of the above power cable of existing 500kV and 500kV exists above-mentioned defective, people can't solve this technical barrier always for a long time.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of stable and reliable for performance, rate of finished products is high, manufacture craft is simple, making is easy, cost is low, the measured 500kV of matter and the integral prefabricated type joint of the above power cable of 500kV.
Realize that the above-mentioned purpose technical scheme is: the integral prefabricated type joint of the above power cable of a kind of 500kV and 500kV; comprise integral prefabricated insulating part, fluid sealant, metal coating shell and conductor adapting piece; integral prefabricated insulating part is arranged on the outside of conductor adapting piece; fluid sealant is arranged on the outside of integral prefabricated insulating part; the metal coating shell is arranged on the outside of fluid sealant; integral prefabricated insulating part includes stress cone, shielded-plate tube, insulating part and external shield, and described integral prefabricated insulating part is made by liquid silastic.
After adopting technique scheme, therefore the utility model has a lot of benefits owing to the manufacturing materials with the integral prefabricated insulating part of critical component is improved to liquid silastic by ethylene propylene diene rubber:
(1) stable and reliable for performance, the rate of finished products height, integrated cost is low.Make the quality of materials of integral prefabricated insulating part and control easily, the material liquid silicon rubber material of integral prefabricated insulating part is simple, need not mix separately, and prescription is simple, easily the control material quality; Viscosity of material is low, and moulding process is good, and the rate of finished products of integral prefabricated insulating part can reach about 90%, and the utility model properties of product are more reliable and more stable, the rate of finished products height, and time-saving energy-saving, integrated cost descends more than 40%.
(2) manufacture craft is simple, makes easily, and cost of manufacture is low.Liquid silastic is a class organic silica gel of relative mixed milling type semisolid silicon rubber and common room temperature vulcanization one pack system silica gel, have lower viscosity and good mobility before the liquid silastic sulfuration, viscosity only is 1/10 of ethylene propylene diene rubber, has more excellent technological forming, therefore manufacture craft is simple, make easily, the briquetting pressure that needs is little, do not need the special special use large-scale notes rubber machine and the large mold of big pressure to carry out the injecting glue moulding, only need just can finish the injecting glue moulding with common injecting glue equipment and mold, as adopt the two component glue-injection machines of liquid silastic, and the glue-injection machine pressure that needs needs only several million, and pressure is 1/10 of ethylene propylene diene rubber notes rubber machine, the injecting glue function is injected continuously, single can reach 400 liters, and the injecting glue amount can satisfy the needs of the integral prefabricated insulating part production of 500kV and the integral prefabricated type joint of the above power cable of 500kV, and equipment volume is little, equipment cost reduces greatly, making apparatus is easy to get, and makes easily, and therefore cost of manufacture of the present utility model is low.
(3) good product quality.Because liquid silastic has lower hardness, Shao Shi A35～45 are good with the stickiness of cable surface, product is installed easily, and hazard rate is low, the aging back of the watertight aircase of liquid silastic mechanical performance (aging condition: 135 ℃ ± 3 ℃, 7d), compression set≤15%, tensile strength rate of change≤10%, the rate of change of percentage elongation≤10%, material ageing resistance good, heat-resisting quantity is good, product can long-time running under 100～150 ℃ of environmental conditions, good product quality, applied widely.
The utility model has solved the complicated technical problem that the available technology adopting ethylene propylene diene rubber exists with simple technical scheme cleverly, has solved insoluble always this technical barrier of people for a long time.
Description of drawings
Fig. 1 is the utility model structural representation that has part 20 cables of conductor 20-1 and insulator 20-2;
Fig. 2 is the glue-injection machine structural representation of the integral prefabricated insulating part of the utility model spare 1 when adopting liquid silastic to make;
Notes rubber machine structural representation when Fig. 3 adopts ethylene propylene diene rubber to make for existing part 1 integral prefabricated insulating part.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
Embodiment
As shown in Figure 1; the integral prefabricated type joint of the above power cable of a kind of 500kV and 500kV; include integral prefabricated insulating part 1, fluid sealant 2, metal coating shell 3 and conductor adapting piece 4; integral prefabricated insulating part 1 is arranged on the outside of the conductor adapting piece 4 of metal making; fluid sealant 2 is arranged on the outside of integral prefabricated insulating part 1; metal coating shell 3 is arranged on the outside of fluid sealant 2; integral prefabricated insulating part 1 includes stress cone 1-1, shielded-plate tube 1-2, insulating part 1-3 and external shield 1-4, and shielded-plate tube 1-2 covers on outside the conductor adapting piece 4.Described integral prefabricated insulating part 1 is made by liquid silastic.
As shown in Figure 2; when the integral prefabricated insulating part 1 of the utility model is made; adopt the two component glue-injection machines of liquid silastic; 100 tons of the glue-injection machine tonnages that needs; the injecting glue function is injected continuously; single can reach more than 300 liters; material with the liquid silicon rubber material of the two components of A component and B component in the manufacturing process is placed on respectively in two packing elements 24 of injector; to expect to annotate in the material pipe 27 by the syringe pump 26 on the injection frame 25; after material mixes through blender 28; be expelled in the die cavity in the mould 29, mould 29 has clamping mechanism 30 lockings, and last mould 29 bakings are made integral prefabricated insulating part 1.
The utility model is not limited to the foregoing description, and the technical scheme that all employings are equal to replacement or equivalence replacement formation all belongs to the claimed scope of the utility model.
Claims (1)
1. 500kV and the integral prefabricated type joint of the above power cable of 500kV; include integral prefabricated insulating part (1); fluid sealant (2); metal coating shell (3) and conductor adapting piece (4); integral prefabricated insulating part (1) is arranged on the outside of conductor adapting piece (4); fluid sealant (2) is arranged on the outside of integral prefabricated insulating part (1); metal coating shell (3) is arranged on the outside of fluid sealant (2); integral prefabricated insulating part (1) includes stress cone (1-1); shielded-plate tube (1-2); insulating part (1-3) and external shield (1-4) is characterized in that: described integral prefabricated insulating part (1) is made by liquid silastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202138598U CN201690194U (en) | 2010-06-03 | 2010-06-03 | Integrated prefabricated joint of power cable of 500kV and above |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202138598U CN201690194U (en) | 2010-06-03 | 2010-06-03 | Integrated prefabricated joint of power cable of 500kV and above |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201690194U true CN201690194U (en) | 2010-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202138598U Expired - Lifetime CN201690194U (en) | 2010-06-03 | 2010-06-03 | Integrated prefabricated joint of power cable of 500kV and above |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201690194U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102270827A (en) * | 2010-06-03 | 2011-12-07 | 江苏安靠超高压电缆附件有限公司 | Integral prefabricated joint for power cable with 500kV and over 500kV |
| CN111049071A (en) * | 2019-12-25 | 2020-04-21 | 安徽省浩辉电力股份有限公司 | Preparation method of integrally prefabricated intermediate joint |
-
2010
- 2010-06-03 CN CN2010202138598U patent/CN201690194U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102270827A (en) * | 2010-06-03 | 2011-12-07 | 江苏安靠超高压电缆附件有限公司 | Integral prefabricated joint for power cable with 500kV and over 500kV |
| CN102270827B (en) * | 2010-06-03 | 2013-06-19 | 江苏安靠智能输电工程科技股份有限公司 | Integral prefabricated joint for power cable with 500kV and over 500kV |
| CN111049071A (en) * | 2019-12-25 | 2020-04-21 | 安徽省浩辉电力股份有限公司 | Preparation method of integrally prefabricated intermediate joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: JIANGSU ANKURA SMART TRANSMISSION ENGINEERING TECH Free format text: FORMER NAME: JIANGSU ANKURA EHV CABLE ACCESSORIES CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 213333 Tianmu Lake Industrial Park, Liyang Economic Development Zone, Jiangsu, China Patentee after: Jiangsu Ankura Smart Transmission Engineering Technology Co., Ltd. Address before: 213333 Tianmu Lake Industrial Park, Liyang Economic Development Zone, Jiangsu, China Patentee before: Jiangsu Ankura EHV Cable Accessories Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101229 |