CN102185274A - 110KV intermediate head and production process thereof - Google Patents
110KV intermediate head and production process thereof Download PDFInfo
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- CN102185274A CN102185274A CN201110000712XA CN201110000712A CN102185274A CN 102185274 A CN102185274 A CN 102185274A CN 201110000712X A CN201110000712X A CN 201110000712XA CN 201110000712 A CN201110000712 A CN 201110000712A CN 102185274 A CN102185274 A CN 102185274A
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Abstract
The invention provides an 110KV intermediate head and a production process thereof. The intermediate head comprises two stress cones (1), a screening tube (2), insulating layers (3) and outer screening layers (4), wherein the screening tube (2) is arranged between the two stress cones (1); the insulating layers (3) are filled between the screening tube (2) and the two stress cones (1); and the outer screening layers (4) are coated outside the insulating layers (3). The process of producing the 110KV intermediate head comprises three formations, that is, the first formation is the formation of the conductive stress cones and the screening tube; the second formation is the formation of the insulating layers: the formed stress cones and a formed stress tube are arranged in a mould during glue injection and then integrated after formation; and the third formation is the formation of outer conducting layers: all parts are integrated after formation to form the intermediate head. The formed insulating layers of the intermediate head are made from transparent insulated rubbers, thus being high in visibility and being convenient to check.
Description
Technical field
The present invention relates to a kind of production technology of transition joint, especially stipulated the production procedure and the production method of 110KV transition joint.
Background technology
Cable intermediate joint is as conductor, insulation screen and the protective layer of stube cable and cable, so that the device that cable line connects.Generally cable intermediate joint has stress cone, shielded-plate tube, insulating barrier and outer shielding layer, and stress cone, shielded-plate tube and outer shielding layer are conductive silicon rubber, and insulating barrier is an electrically insulating silicone rubber, and silicon rubber formed by repeatedly annotating; Existing manufacturing technique is to produce stress cone, shielded-plate tube and outer shielding layer earlier, and then is the injection electrically insulating silicone rubber, with stress cone, shielded-plate tube and outer shielding layer integrator; There are two problems in this production technology:
The one, stress cone, shielded-plate tube and outer shielding layer are installed in the fixed position of electrically insulating silicone rubber mould before the injection electrically insulating silicone rubber, because outer shielding layer is thinner, and volume is big, and easy deformation during installation is difficult for assembling; The difficult control of pressure when annotating silicon rubber, the bad problem that existed glue and outer shielding layer to be extruded distortion of pressure control, though this technology can be produced, rate of finished products is not high, and the difficult control of technological parameter.
The 2nd, what the insulated part of existing transition joint adopted is coloured opaque electrically insulating silicone rubber body, and stress cone, what shielded-plate tube and outer shielding layer adopted is black non transparent conductive silicon rubber body, when the injection electrically insulating silicone rubber, may have the bigger impurity of volume takes in the electrically insulating silicone rubber, insulated part is wrapped up by outer shielding layer behind the sulfidization molding, can't directly with the naked eye check, if contain too much impurity in the electrically insulating silicone rubber, electric property to rubber seriously influences, can cause partial discharge during operation, influence the useful life of transition joint, can directly puncture when serious.
Summary of the invention
The objective of the invention is a kind of 110KV transition joint and production technology thereof at the problems referred to above proposition, the insulating barrier of the transition joint of moulding of the present invention adopts transparent insulation silicon rubber, the advantage of have the visibility height, being convenient to check.
Technical scheme of the present invention is:
A kind of 110KV transition joint, it comprises two stress cones, shielded-plate tube, insulating barrier and outer shielding layer, and described shielded-plate tube is filled insulating barrier (3) between shielded-plate tube and two stress cones between two stress cones, and outer shielding layer is wrapped in the outside of insulating barrier.
A kind of production technology of 110KV transition joint, it may further comprise the steps:
(a), the moulding of stress cone and shielded-plate tube: the mould of counter stress awl and shielded-plate tube carries out preheating respectively, smears mould release then on the wall of the chamber of mould; Inject conductive silicon rubber, the time of injecting glue overflows silicon rubber with the Jiao Kou that overflows and is as the criterion; Silicon rubber carries out post bake until conductive silicon rubber sulfidization molding in mould to mould after annotating and finishing;
(b), the moulding of insulating barrier: stress cone, shielded-plate tube to forming in insulating barrier mould and the step (a) carry out preheating, smear mould release on the die cavity wall of insulating barrier mould, and above-mentioned stress cone and shielded-plate tube are assembled in the insulating barrier mould; Inject electrically insulating silicone rubber, after injecting glue is finished, mould is carried out post bake until electrically insulating silicone rubber sulfidization molding in mould;
(c), the moulding of outer shielding layer: the rubber parts to forming in outer shielding layer mould and the step (b) carries out preheating, on the die cavity wall of outer shielding layer mould, smear mould release, the rubber parts of forming in the above-mentioned steps (b) is assembled in the insulating barrier mould; Injecting conductive silicon rubber, is 12MP-15MP at injecting glue initial stage pressure, and the injecting glue time is 6-12min, afterwards injecting glue pressure is transferred to 18MP-22MP; After injecting glue is finished, mould is carried out post bake until conductive silicon rubber sulfidization molding in mould;
(d), after the sulfuration of three injecting glues finishes, product is carried out post-cure, rubber is further crosslinked, obtains the transition joint of moulding.
In the step of the present invention (a), mould is carried out preheating, preheat temperature is controlled at 50 ℃-60 ℃; Pressure in the injecting glue process is controlled at 12MP-22MP; Mould is carried out post bake, and temperature is controlled at 90 ℃-120 ℃, and cure time is determined according to the height of mold temperature and ambient temperature.
In the step of the present invention (b), stress cone, the shielded-plate tube of forming in insulating barrier mould and the step (a) carried out preheating, preheat temperature is controlled at 50 ℃-60 ℃, then insulation; After injecting glue is finished, mould is carried out post bake, temperature is controlled at 90 ℃-120 ℃.、
In the step of the present invention (c), the rubber parts of forming in outer shielding layer mould and the step (b) is carried out preheating, preheat temperature is controlled at 50 ℃-60 ℃.
In the step of the present invention (d), to product carry out post-cure be just in the step (c) rubber parts of forming put into that baking oven heats, post-cure, curing temperature is 200 ℃.
Insulating barrier mould of the present invention is the shape that two stress cones, shielded-plate tube and insulating barrier are connected as one; The outer shielding layer mould is that the shape that two stress cones, shielded-plate tube, insulating barrier and outer shielding layer are connected as one is the mould of transition joint global shape.
Insulating barrier of the present invention adopts transparent insulation silicon rubber.
Beneficial effect of the present invention:
The present invention is at the profiled insulation layer segment, notes be electrically insulating silicone rubber.Before annotating electrically insulating silicone rubber, to be assembled to the stress cone of forming and shielded-plate tube in the mould and then injecting glue; Will be preheating to the temperature of regulation before assembling to mould, stress cone and shielded-plate tube, mould and die preheating will smear demoulding water on the die cavity wall to mould later, so that the demoulding; After finishing, the mould assembling carries out injecting glue at once, because mould will guarantee certain temperature during injecting glue, temperature is too high or to cross low all be to produce, the technology of annotating electrically insulating silicone rubber is particularly complicated, it mainly is exactly to be that free from admixture is sneaked in the silicon rubber when guaranteeing injecting glue, also to fully clear up mould, the glue mouth no-sundries that guarantees to overflow stops up, whether the exhaust outlet of checking mould simultaneously can normal exhaust, can not there be foreign matter to stop up exhaust outlet, if exhaust outlet stops up, injecting glue can be not in place, also can be at the inner bubble that produces of silicon rubber body.After injecting glue is finished, to the temperature of mold heated to regulation, insulation then, temperature retention time is according to the regulation of technology.
The insulating barrier of transition joint of the present invention adopts transparent insulation silicon rubber, the advantage of have the visibility height, being convenient to check.
The problem that the present invention is directed to existing technology existence proposes a kind of new technology, and the one, change technological process, the 2nd, adopt different electrically insulating silicone rubbers.
Old technological process: the moulding in advance of stress cone, shielded-plate tube and outer shielding layer, and then be the injection electrically insulating silicone rubber, be combined into one with stress cone, shielded-plate tube and outer shielding layer.
Technology after the improvement: at first being the moulding of stress cone and shielded-plate tube, then is the injection electrically insulating silicone rubber, is combined into one with stress cone and shielded-plate tube, is injection external shield conductive silicon rubber at last, is combined into one with insulated part, stress cone and stress tube.
What insulated part adopted in the old technology is coloured (white or grey) opaque electrically insulating silicone rubber body; What adopt in the technology after improvement is water white transparency electrically insulating silicone rubber body.
After technological process improves, easily when having solved outer shielding layer complicated, injecting glue being installed cross glue and outer shielding layer is extruded yielding problem, and relatively stable technological parameter, rate of finished products improved.
The use of water white transparency electrically insulating silicone rubber body and the change of technological process in the technology to the naked eyes property examined of big impurity in the electrically insulating silicone rubber body, and have guaranteed the performance of product when not only having realized producing.
Description of drawings
Fig. 1 is the structural representation of transition joint of the present invention.
Fig. 2 is the structural representation of stress cone of the present invention and shielded-plate tube.
Fig. 3 is the structural representation after the insulating barrier moulding of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
As shown in Figure 1, in the production process of the above transition joint of a kind of 110KV, requirement for production environment is relatively stricter, if in conventional environment, produce, airborne dust can pollute rubber bodies, because product is through the multiple injection moulding, when mould is installed, parts have been directly exposed in the air, all can be infected with airborne dust on die surface and the rubber bodies, injecting glue is will be mixed in the liquid rubber, just stays in the rubber body after waiting to vulcanize, electrically insulating silicone rubber particularly, if contain too much impurity in the silicon rubber body, the electric property of rubber is seriously influenced, can cause partial discharge, influence the useful life of transition joint, serious words can directly puncture.
Pollute rubber body in process of production for fear of impurity, can remove by technology once, it at first is production environment, build dust-free workshop, dust-free workshop can be with the contaminant exclusion of airborne dust, particulate, noxious air, bacterium etc., and with indoor temperature, cleanliness factor, room pressure, air velocity and air-flow distribution, noise vibration and illumination, electrostatic control in required scope, can be good at satisfying the production environment requirement of transition joint; Next is will clean the rubber components surface with alcohol or normal heptane when mounted; Be exactly at last after mould installs, in die cavity, feed pure nitrogen gas, the air in the die cavity is discharged.
In the whole process of production, the technology difference of injecting glue moulding each time, be the moulding of stress cone and shielded-plate tube for the first time, will be before injecting glue the temperature of mould and die preheating to regulation, smear mould release in mold cavity wall then, help the demoulding, simultaneously can avoid sticking at mold cavity surface after the vulcanization of rubber, then be injecting glue, pressure transfers to 12MP-16MP during injecting glue, and the time of injecting glue overflows silicon rubber with the Jiao Kou that overflows and is as the criterion, after silicon rubber is annotated and is finished, again mould is continued to be warmed up to the temperature of regulation, after the temperature of regulation rubber will be in mould sulfidization molding, cure time can be determined according to the height of mold temperature and ambient temperature.
Be shaped to for the second time the intermediate insulation part, injection be electrically insulating silicone rubber.Before the injection electrically insulating silicone rubber, to be assembled to the stress cone of forming and shielded-plate tube in the mould and then injecting glue; Will be preheating to the temperature of regulation before assembling to mould, stress cone and shielded-plate tube, mould and die preheating will smear mould release on the die cavity wall to mould later, so that the demoulding; After assembling, mould to carry out injecting glue immediately, because being mould, injecting glue to guarantee certain temperature, temperature is too high or mistake is low all can not produce, the technology of annotating electrically insulating silicone rubber is particularly complicated, what it was main is exactly to be can not have impurity to sneak in the silicon rubber when guaranteeing injecting glue, also to clear up fully mould, the Jiao Kou that guarantees to overflow does not have foreign material to stop up, whether the exhaust outlet that also will check simultaneously mould can normal exhaust, can not there be foreign matter to stop up exhaust outlet, if because exhaust outlet stops up, injecting glue can be not in place, also can be at the inner bubble that produces of silicon rubber body.After injecting glue is finished, to the temperature of mold heated to regulation, insulation then, temperature retention time is according to the regulation of technology.
Be shaped to outer shielding layer for the third time, before injecting glue, be the same during with moulding for the second time to the processing of the rubber parts after mould and the post forming, main difference is the adjustment of injecting glue pressure, because crust is thinner, injecting glue is that pressure will be relatively more greatly, and not so the injecting glue time can be very long, or even annotates and do not advance silicon rubber, can hang down a bit at injecting glue initial stage pressure, after the situation of low-pressure is made a bet a period of time, heighten pressure.
After three injecting glue sulfurations are finished, product is carried out post-cure, make rubber further crosslinked, improve the mechanical property and the compression set performance of rubber.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (8)
1. 110KV transition joint, it comprises two stress cones (1), shielded-plate tube (2), insulating barrier (3) and outer shielding layer (4), described shielded-plate tube (2) is positioned between two stress cones (1), fill insulating barrier (3) between shielded-plate tube (2) and two stress cones (1), outer shielding layer (4) is wrapped in the outside of insulating barrier (3).
2. the production technology of the described 110KV transition joint of claim 1 is characterized in that it may further comprise the steps:
(a), the moulding of stress cone (1) and shielded-plate tube (2): the mould of counter stress awl (1) and shielded-plate tube (2) carries out preheating respectively, smears mould release then on the wall of the chamber of mould; Inject conductive silicon rubber, the time of injecting glue overflows silicon rubber with the Jiao Kou that overflows and is as the criterion; Silicon rubber carries out post bake until conductive silicon rubber sulfidization molding in mould to mould after annotating and finishing;
(b), the moulding of insulating barrier (3): stress cone (1), shielded-plate tube (2) to forming in insulating barrier mould and the step (a) carry out preheating, on the die cavity wall of insulating barrier mould, smear mould release, above-mentioned stress cone (1) and shielded-plate tube (2) are assembled in the insulating barrier mould; Inject electrically insulating silicone rubber, after injecting glue is finished, mould is carried out post bake until electrically insulating silicone rubber sulfidization molding in mould;
(c), the moulding of outer shielding layer (4): the rubber parts to forming in outer shielding layer mould and the step (b) carries out preheating, on the die cavity wall of outer shielding layer mould, smear mould release, the rubber parts of forming in the above-mentioned steps (b) is assembled in the insulating barrier mould; Injecting conductive silicon rubber, is 12MP-15MP at injecting glue initial stage pressure, and the injecting glue time is 6-12min, afterwards injecting glue pressure is transferred to 18MP-22MP; After injecting glue is finished, mould is carried out post bake until conductive silicon rubber sulfidization molding in mould;
(d), after the sulfuration of three injecting glues finishes, product is carried out post-cure, rubber is further crosslinked, obtains the transition joint of moulding.
3. the production technology of 110KV transition joint according to claim 1 is characterized in that in step (a) mould being carried out preheating, and preheat temperature is controlled at 50 ℃-60 ℃; Pressure in the injecting glue process is controlled at 12MP-22MP; Mould is carried out post bake, and temperature is controlled at 90 ℃-120 ℃, and cure time is determined according to the height of mold temperature and ambient temperature.
4. the production technology of 110KV transition joint according to claim 1, it is characterized in that in step (b), stress cone (1), shielded-plate tube (2) to forming in insulating barrier mould and the step (a) carry out preheating, and preheat temperature is controlled at 50 ℃-60 ℃, then insulation; After injecting glue is finished, mould is carried out post bake, temperature is controlled at 90 ℃-120 ℃.
5. the production technology of 110KV transition joint according to claim 1 is characterized in that in step (c), and the rubber parts of forming in outer shielding layer mould and the step (b) is carried out preheating, and preheat temperature is controlled at 50 ℃-60 ℃.
6. the production technology of 110KV transition joint according to claim 1, it is characterized in that in step (d), to product carry out post-cure be just in the step (c) rubber parts of forming put into that baking oven heats, post-cure, curing temperature is 200 ℃.
7. the production technology of 110KV transition joint according to claim 1 is characterized in that the insulating barrier mould is the shape that two stress cones (1), shielded-plate tube (2) and insulating barrier (3) are connected as one; The outer shielding layer mould is that the shape that two stress cones (1), shielded-plate tube (2), insulating barrier (3) and outer shielding layer (4) are connected as one is the mould of transition joint global shape.
8. the production technology of 110KV transition joint according to claim 1 is characterized in that insulating barrier (3) adopts transparent insulation silicon rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110000712 CN102185274B (en) | 2011-01-04 | 2011-01-04 | Production process of 110KV intermediate head |
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| CN 201110000712 CN102185274B (en) | 2011-01-04 | 2011-01-04 | Production process of 110KV intermediate head |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496900A (en) * | 2011-11-14 | 2012-06-13 | 申环电缆科技有限公司 | Manufacturing method of whole-prefabricated intermediate joint |
| CN102570376A (en) * | 2012-01-18 | 2012-07-11 | 中科英华高技术股份有限公司 | Production method of insulation intermediate connector |
| CN104967066A (en) * | 2015-06-11 | 2015-10-07 | 天津送变电工程公司 | Crosslinked cable prefabricated intermediate joint installation method |
| CN106098255A (en) * | 2016-06-24 | 2016-11-09 | 安徽省浩辉电力技术有限公司 | Production technology is connected in the middle of a kind of 10kV crosslinked cable shrinkage |
| CN110253846A (en) * | 2019-05-21 | 2019-09-20 | 江苏士林电气设备有限公司 | A kind of primary pre-formed technique of high-speed rail train hv cable termination |
| CN110676798A (en) * | 2019-09-17 | 2020-01-10 | 全球能源互联网欧洲研究院 | Conductive cone, cable terminal and cable intermediate joint |
| 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 |
| CN111146738A (en) * | 2018-11-06 | 2020-05-12 | 江苏中天科技电缆附件有限公司 | Preparation method of intermediate joint prefabricated main body and intermediate joint prefabricated main body |
| CN111585063A (en) * | 2019-02-19 | 2020-08-25 | 安徽省浩辉电力技术有限公司 | Preparation method of integrally prefabricated intermediate joint |
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| CN101222129A (en) * | 2007-01-12 | 2008-07-16 | 深圳市长园新材料股份有限公司 | Full chilling shrink crosslinked cable insulation joint |
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| JP2004248435A (en) * | 2003-02-14 | 2004-09-02 | Fujikura Ltd | Connecting section for plastic insulation power cable |
| CN2640086Y (en) * | 2003-07-28 | 2004-09-08 | 保定合力达电缆附件有限公司 | Shrinkage power cable intermediate connector |
| CN101222129A (en) * | 2007-01-12 | 2008-07-16 | 深圳市长园新材料股份有限公司 | Full chilling shrink crosslinked cable insulation joint |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496900A (en) * | 2011-11-14 | 2012-06-13 | 申环电缆科技有限公司 | Manufacturing method of whole-prefabricated intermediate joint |
| CN102570376A (en) * | 2012-01-18 | 2012-07-11 | 中科英华高技术股份有限公司 | Production method of insulation intermediate connector |
| CN104967066A (en) * | 2015-06-11 | 2015-10-07 | 天津送变电工程公司 | Crosslinked cable prefabricated intermediate joint installation method |
| CN106098255A (en) * | 2016-06-24 | 2016-11-09 | 安徽省浩辉电力技术有限公司 | Production technology is connected in the middle of a kind of 10kV crosslinked cable shrinkage |
| CN111146738A (en) * | 2018-11-06 | 2020-05-12 | 江苏中天科技电缆附件有限公司 | Preparation method of intermediate joint prefabricated main body and intermediate joint prefabricated main body |
| CN111585063A (en) * | 2019-02-19 | 2020-08-25 | 安徽省浩辉电力技术有限公司 | Preparation method of integrally prefabricated intermediate joint |
| CN110253846A (en) * | 2019-05-21 | 2019-09-20 | 江苏士林电气设备有限公司 | A kind of primary pre-formed technique of high-speed rail train hv cable termination |
| CN110676798A (en) * | 2019-09-17 | 2020-01-10 | 全球能源互联网欧洲研究院 | Conductive cone, cable terminal and cable intermediate joint |
| 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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