CN202076722U - Cross-linked polyethylene cable insulation repair liquid injection adapter - Google Patents
Cross-linked polyethylene cable insulation repair liquid injection adapter Download PDFInfo
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- CN202076722U CN202076722U CN2011201904325U CN201120190432U CN202076722U CN 202076722 U CN202076722 U CN 202076722U CN 2011201904325 U CN2011201904325 U CN 2011201904325U CN 201120190432 U CN201120190432 U CN 201120190432U CN 202076722 U CN202076722 U CN 202076722U
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- 239000007788 liquid Substances 0.000 title claims abstract description 71
- 238000009413 insulation Methods 0.000 title claims abstract description 61
- 230000008439 repair process Effects 0.000 title claims abstract description 59
- 238000002347 injection Methods 0.000 title claims abstract description 29
- 239000007924 injection Substances 0.000 title claims abstract description 29
- 229920003020 cross-linked polyethylene Polymers 0.000 title abstract description 9
- 239000004703 cross-linked polyethylene Substances 0.000 title abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 29
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Abstract
The utility model discloses a cross-linked polyethylene cable insulation repair liquid injection adapter, which mainly comprises an adapter body casing, a sealing casing and a seal. The body casing is made of metal. One end of the body casing is closed and the other end of the body casing is open. The inner diameter of a casing chamber is matched with the outer edge of a cable insulating layer to be repaired. Male threads which are in thread-pair connection with the sealing casing are designed at the open end. An insulation repair liquid injection interface is designed on a casing body. The sealing casing is made of a heat-shrinkable material and consists of a female thread section which forms a thread connection pair together with the male threads on the body casing, a connection section which is matched with the cable insulating layer to be repair and a transition section which is arranged between the female thread section and the connection section. The seal is arranged in the casing chamber of the transition section of the sealing casing. The cross-linked polyethylene cable insulation repair liquid injection adapter has the characteristics of simple structure, low requirement on machining accuracy, easy production, convenient assembling and disassembling, unique sealing method, good sealing performance, high pressure resistance, stable operation and the like.
Description
Technical field
The utility model relates to the power cable recovery technique, relate in particular to the insulation repair liquid injection technique of middle pressure (6kV-35kV) XLPE (crosslinked polyethylene) power cable, be the adapter that a kind of novel XLPE cable repairing liquid injection system is connected with cable end, can be used for moving in the insulation recovery project of aging back cable.
Background technology
XLPE (crosslinked polyethylene) power cable is used widely in China's power industry at present because of its reliable electric and mechanical performance.But because the water proofing property of early stage cable is not good, the long-term back insulation moisture in the absorbing environmental gradually that uses causes big water gaging tree under electric field action.When the water tree reached capacity state in the insulation, the water tree developed into the electricity tree, caused that finally cable insulation punctures.The XLPE cable of a lot of urban distribution networks is gone through the more than ten years operation, and its main insulation is subjected to the degree of water tree aging quite serious, and under cover a lot of potential potential safety hazards for the maintenance of cable, change and bring extensive work, cause great amount of manpower, financial resources waste.In addition, because cable is embedded in underground and concentrates on the inner city, changing cable also is a very difficult job.Therefore, the reparation of if can insulating to the cable of at present big water gaging tree aging and operation prolongs its useful life, will bring huge economic benefit and social benefit.
The cable insulation reparation is to carry out under the state that has a power failure, and utilizes the cable insulation repairing liquid injection system will insulate repair liquid from cable end injection cable insulation realization reparation.Therefore the requirement to the cable insulation repairing liquid injection system is, shortens repair process under safe and reliable prerequisite as far as possible, reduces interruption duration, simultaneously can be suitable for the high pressure repair liquid, reliable stable, so that repair liquid is injected into insulating barrier fast, realize quick reparation to cable insulation.In order to realize quick reparation, repair system should be installed should be simple, but the miscellaneous part of repair system assembly and adjustment before implementing reparation.The installation because adapter can only have a power failure at the scene, adapter and the key point and the weak link that connecting of cable end also just become the cable insulation repair system, if the sealing effectiveness between adapter and the cable is not good, then just cause repair liquid to leak easily, it is low to be suitable for repair liquid pressure, the repair liquid injection rate is slow, inefficiency, problem such as interruption duration is long.
Given this, repair research field, the many cable connection heads (adapter) that can relate in the cable insulation repairing liquid injection system of research at cable insulation.U.S. Pat 7331806B2 discloses a kind of cable connection head that has the interior reservoir liquid bath, and this coupling head inside is divided into several cavitys, can prolong the time that repair liquid passes through, and reduces the influence of external environment condition to repair process by the transmission of pressure.The cable connection head of this design, its internal structure complexity, the production cost height costs an arm and a leg.
The cable recovery technique still is in the starting stage in China, and it is 200410072791.5 that designer of the present utility model has only retrieved an application number, and denomination of invention is the patent application document of " repairing liquid injection system for cross-linked cable ".This system is controlled with streamer speed, injection rate and the pressure of repair liquid, intuitively can be considered the starting point that it is dealt with problems, and carried out the design of technical scheme with this.But in its technical scheme, matching used repair liquid fill adapter exists significantly not enough.First adapter structure complexity, installation and removal are inconvenient, length consuming time, and cause repair liquid to leak easily.It two is that adapter and cable end connection place hermetically-sealed construction are unreasonable, under high pressure, be difficult to guarantee sealing, therefore the adapter of this system only is applicable to the situation that pressure is not high, reparation for long cable can cause the logical time of repair liquid injection filling longer, it is slow that cable insulation is repaired speed, remediation efficiency is low, and then the time that causes power failure is long.
The utility model content
The deficiency that the adapter that is connected with cable end at the cable repairing liquid injection system of prior art exists, the utility model aims to provide a kind of crosslinking polyethylene-insulated cable insulation repair liquid fill adapter of new construction, the complex structure that exists with the adapter that overcomes prior art, installation and removal inconvenience, sealing is poor, bears the low deficiency that waits of pressure.
The crosslinking polyethylene-insulated cable insulation repair liquid fill adapter that the utility model provides, its formation mainly comprises the adaptor body sleeve pipe, Sealed casing pipe and sealing, described body sleeve is to be made by metal material, one end sealing other end opening, lumen diameter and cable insulation outer rim to be repaired are complementary, the openend design has the external screw thread that connects with Sealed casing pipe formation screw thread pair, design has insulation repair liquid grouting socket on the body, described Sealed casing pipe is served as reasons and made by the thermal contraction material, by with body sleeve on external screw thread constitute the internal thread segment that screw thread pair connects, and cable insulation outer rim coupling connecting section to be repaired and the changeover portion between them constitute, and described sealing is placed in the changeover portion tube chamber of Sealed casing pipe.
For solving technical problem to be solved in the utility model better, can be on the basis of technique scheme further respectively or combination or take following technique measures in the lump:
Sealed casing pipe is used to settle the tube chamber of sealing, and promptly the thread connection section of Sealed casing pipe and the transition tube chamber that is nested with between the connecting section are preferably conical surface tube chamber.The packing seal that preferential employing of described sealing and conical surface tube chamber adapt.
In an end tube chamber of body sleeve and Sealed casing pipe thread connection, preferred design is useful on body sleeve closely is placed on the outer installation screw thread of cable insulation.
Insulation repair liquid grouting socket on the body sleeve preferably adopts the thread connection interface.
Body sleeve is sealed an end pipe end preferred design and is useful on body sleeve closely is placed on clamp structure on the cable insulation outer edge surface.
Adapter can be equipped with the connecting tube assembly that connects adapter and insulation repairing liquid injection system, the connecting tube assembly by with body sleeve on the joining permanent joint of repair liquid grouting socket, constitute with the joining tap of repairing liquid injection system and connecting tube, the connecting tube two ends link with permanent joint and tap respectively.
The disclosed crosslinking polyethylene-insulated cable insulation repair liquid of the utility model fill adapter, compare with the adapter of prior art and to have following very outstanding technique effect and advantage:
(1) adapter of the present utility model, its body sleeve is end sealing, the other end of opening directly is nested with on cable end insulating barrier outer edge surface, with respect to prior art body sleeve two ends adapter of opening all, only need between body sleeve opening one end tube chamber and cable insulation outer edge surface, to carry out encapsulation process, greatly reduce the possibility that sealing difficulty and repair liquid leak.
(2) adapter of the present utility model is processed with screw thread at body sleeve openend tube chamber inside and outside wall, closely mates with protective coverings of cable by internal thread to link to each other, and can realize preliminary sealing.Of the present utility model one big innovative point adopts and is subjected to the Sealed casing pipe of thermal contraction material as main containment member, and between body sleeve and Sealed casing pipe, adopt screw thread pair to connect, utilize Sealed casing pipe to have the characteristic of the thermal contraction of being subjected to, and thread connection can increase connection contact-making surface and interlock degree, improve the sealing of adapter, thereby promoted the withstand voltage pressure of adapter greatly, and then improved the repair liquid injection rate.Owing to adopt the collapsed seal sleeve pipe that is heated to seal, when the cable insulation reparation is operated, only need make its contraction can realize sealing to the Sealed casing pipe heating, operate very simple, consuming time weak point, simultaneously convenient disassembly, strong, the good sealing effect of tolerance high pressure ability can significantly reduce time of power failure.
(3) the connecting tube device of adapter outfit can assemble before cable insulation reparation operation, can save the outfit time of adapter, and then save the reparation interruption duration.Flexible pipe is adopted in the connecting tube of connecting tube assembly, it adopts tap to connect with repairing liquid injection system, convenience is docked with repairing liquid injection system and is separated, and can be by changing different taps, adapter can be linked to each other with the liquid injection pipe of various repair liquid system, thereby make adapter have versatility, can promote the use of.
Adapter of the present utility model, used various materials are common commercially available prod, and with low cost, processing mode is simple.
The disclosed cable insulation repair liquid of the utility model fill adapter, with respect to similar products at home and abroad, its advantage can be summarized as: simple in structure, less demanding to measure of precision, installation and removal are convenient, the sealing means uniqueness, good airproof performance can bear than higher pressure, stable and reliable operation, be easy to produce, help the popularization of this technology.
Description of drawings
Fig. 1 is the adapter overall structure schematic diagram of an embodiment of the utility model.
Fig. 2 be in the accompanying drawing 1 A to structural representation.
Fig. 3 is the adapter of an embodiment of the utility model and the structural representation that cable end is linked together.
In above-mentioned accompanying drawing, the object of each shown by reference numeral sign is respectively: the 1-clamp structure; The 2-body sleeve; The 3-permanent joint; The 4-connecting tube; The 5-tap; The 6-external screw thread; The 7-internal thread; The 8-packing seal; The 9-Sealed casing pipe; 10-repair liquid grouting socket; The 11-cable end; 12-cable insulation outer rim.
Embodiment
Provide an example of the present utility model below in conjunction with description of drawings; and the utility model is described in more detail by embodiment; but be necessary to be pointed out that at this; embodiment only is used for the utility model is further specified; make the those skilled in the art understand the utility model more easily; can not be interpreted as restriction to the utility model protection range; it is need not pay creative work that the person skilled in art makes according to above-mentioned content of the present utility model that some nonessential improvement and adjustment specifically implement, and should still belong to protection range of the present utility model.
Embodiment
The crosslinking polyethylene-insulated cable insulation repair liquid fill adapter of present embodiment, its structure are shown in accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3, and its structure is made of body sleeve 2, Sealed casing pipe 9, packing seal 8 and connecting tube assembly.Described body sleeve is made by stainless steel, one end sealing other end opening, openend tube chamber inside and outside wall respectively is processed with one section screw thread, internal thread 7 be placed in the tube chamber cable insulation outer rim to be repaired and closely mate, form the preliminary sealing of adapter, the termination design that body sleeve is sealed an end is useful on body sleeve is placed on clamp structure 1 on the cable insulation outer edge surface, to make things convenient for the adapter assembly and disassembly, be processed with the repair liquid grouting socket 10 of helicitic texture on the sleeve pipe body, interface is positioned at cable end 11 and stretches into corresponding scope.Described Sealed casing pipe is by being made by the thermal contraction material, by and body sleeve on external screw thread 6 constitute thread connection internal thread segment, and cable insulation outer rim to be repaired coupling connecting section and the changeover portion between them constitute, changeover portion is a conical surface tube chamber.Packing seal 8 is placed in the conical surface transition tube chamber of Sealed casing pipe.Body sleeve and Sealed casing pipe adopt thread connection, because Sealed casing pipe 9 has the characteristic of the thermal contraction of being subjected to, make body sleeve can fully contact interlock with connection screw thread between the Sealed casing pipe, between Sealed casing pipe and cable insulation outer edge surface, be provided with packing seal in addition, have good sealing effectiveness, reach the air-tightness under the elevated pressures.The connecting tube assembly of connection adapter that adapter is equipped with and insulation repairing liquid injection system, by with body sleeve on helicitic texture the joining permanent joint 3 of repair liquid grouting socket, constitute with the joining tap 5 of repairing liquid injection system and connecting tube 4, connecting tube is a transparent plastic hose, and two ends link with permanent joint and tap respectively.
Concrete use of the present utility model is as follows:
1, parcel one deck unsintered tape on cable end insulating barrier outer edge surface to be repaired is nested with the body sleeve of adapter outside cable end, utilizes instrument to make the internal thread of the body sleeve of adapter closely be nested with on the cable insulation outer edge surface (as shown in Figure 1);
2, filling with sealant 8 in the changeover portion conical surface tube chamber of the adapter Sealed casing pipe that connects with cable insulation outer rim coupling, and on the external screw thread of adaptor body sleeve pipe, also wrap one deck and fill glue, Sealed casing pipe is nested with on the cable insulation outer edge surface, by connecting screw thread pair and body sleeve close fit together.
3, the mode with heating makes Sealed casing pipe shrink the formation hermetically sealed case, reaches sealing effectiveness.After the Sealed casing pipe pipe is subjected to thermal contraction and cools off hardening, with the connecting tube assembly adapter and repairing liquid injection system are linked, begin to inject repair liquid, repair liquid enters cable core by the slit between cable end and insulating barrier, because adapter good seal performance, can under higher pressure, inject repair liquid, promote the repair liquid injection rate.
4, after repair process finishes, take off the connecting tube assembly from adapter and repairing liquid injection system, sever the adapter Sealed casing pipe with instrument, pull down the adaptor body sleeve pipe, the cable insulation reparation is finished.
Claims (10)
1. crosslinking polyethylene-insulated cable insulation repair liquid fill adapter, it is characterized in that mainly comprising adaptor body sleeve pipe (2), Sealed casing pipe (9) and sealing (8), described body sleeve is to be made by metal material, one end sealing other end opening, lumen diameter and cable insulation outer rim to be repaired are complementary, the openend design has the external screw thread (6) that connects with Sealed casing pipe formation screw thread pair, design has insulation repair liquid grouting socket on the body, described Sealed casing pipe is by made by the thermal contraction material, by with body sleeve on external screw thread constitute internal thread (7) section that screw thread pair connects, and cable insulation outer rim coupling connecting section to be repaired and the changeover portion between them constitute, and described sealing is placed in the changeover portion tube chamber of Sealed casing pipe.
2. crosslinking polyethylene-insulated cable insulation repair liquid fill adapter according to claim 1 is characterized in that it is conical surface tube chamber that Sealed casing pipe is used for settling the changeover portion tube chamber of sealing (8).
3. crosslinking polyethylene-insulated cable insulation repair liquid fill adapter according to claim 2 is characterized in that the described packing seal that adapts with conical surface tube chamber that is sealed into.
4. crosslinking polyethylene-insulated cable insulation repair liquid fill adapter according to claim 1 is characterized in that the insulation repair liquid grouting socket on the body sleeve is the thread connection interface.
5. according to the described crosslinking polyethylene-insulated cable insulation repair liquid of one of claim 1 to 4 fill adapter, it is characterized in that the design of body sleeve openend lumen wall has screw thread.
6. according to the described crosslinking polyethylene-insulated cable insulation repair liquid of one of claim 1 to 4 fill adapter, it is characterized in that body sleeve seals end pipe end design and be useful on body sleeve is placed on clamp structure on the cable insulation outer edge surface.
7. crosslinking polyethylene-insulated cable insulation repair liquid fill adapter according to claim 5 is characterized in that body sleeve seals end pipe end design and be useful on body sleeve is placed on clamp structure on the cable insulation outer edge surface.
8. according to the described crosslinking polyethylene-insulated cable insulation repair liquid of one of claim 1 to 4 fill adapter, it is characterized in that being furnished with repair liquid and inject the connecting tube assembly, by with body sleeve on the joining permanent joint of repair liquid grouting socket (3), with the joining tap of repairing liquid injection system (5) and connecting tube (4) formation, the two ends of connecting tube link with permanent joint and tap respectively.
9. crosslinking polyethylene-insulated cable insulation repair liquid fill adapter according to claim 5, it is characterized in that being furnished with repair liquid and inject the connecting tube assembly, by with body sleeve on the joining permanent joint of repair liquid grouting socket (3), with the joining tap of repairing liquid injection system (5) and connecting tube (4) formation, the two ends of connecting tube link with permanent joint and tap respectively.
10. crosslinking polyethylene-insulated cable insulation repair liquid fill adapter according to claim 6, it is characterized in that being furnished with the connecting tube assembly, by with body sleeve on the joining permanent joint of repair liquid grouting socket (3), with the joining tap of repairing liquid injection system (5) and connecting tube (4) formation, the two ends of connecting tube link with permanent joint and tap respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201904325U CN202076722U (en) | 2011-06-09 | 2011-06-09 | Cross-linked polyethylene cable insulation repair liquid injection adapter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201904325U CN202076722U (en) | 2011-06-09 | 2011-06-09 | Cross-linked polyethylene cable insulation repair liquid injection adapter |
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| Publication Number | Publication Date |
|---|---|
| CN202076722U true CN202076722U (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201904325U Expired - Fee Related CN202076722U (en) | 2011-06-09 | 2011-06-09 | Cross-linked polyethylene cable insulation repair liquid injection adapter |
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| CN (1) | CN202076722U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631222A (en) * | 2018-03-19 | 2018-10-09 | 柳州钢铁股份有限公司 | Zinc-Oxide Arrester lead cracking restorative procedure |
| CN111029993A (en) * | 2019-12-29 | 2020-04-17 | 南京电博机器人技术有限公司 | High-voltage bushing salt corrosion prevention device and method based on charged perfusion |
| CN112165019A (en) * | 2020-09-22 | 2021-01-01 | 南方电网科学研究院有限责任公司 | Connector and repair device for bad electrical contact inside high-voltage cable |
| CN112864968A (en) * | 2021-01-18 | 2021-05-28 | 天津大学 | High-pressure crosslinked polyethylene cable buffer layer repairing device and repairing method thereof |
-
2011
- 2011-06-09 CN CN2011201904325U patent/CN202076722U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631222A (en) * | 2018-03-19 | 2018-10-09 | 柳州钢铁股份有限公司 | Zinc-Oxide Arrester lead cracking restorative procedure |
| CN111029993A (en) * | 2019-12-29 | 2020-04-17 | 南京电博机器人技术有限公司 | High-voltage bushing salt corrosion prevention device and method based on charged perfusion |
| CN112165019A (en) * | 2020-09-22 | 2021-01-01 | 南方电网科学研究院有限责任公司 | Connector and repair device for bad electrical contact inside high-voltage cable |
| CN112165019B (en) * | 2020-09-22 | 2022-02-18 | 南方电网科学研究院有限责任公司 | Connector and repair device for bad electrical contact inside high-voltage cable |
| CN112864968A (en) * | 2021-01-18 | 2021-05-28 | 天津大学 | High-pressure crosslinked polyethylene cable buffer layer repairing device and repairing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Effective date: 20121101 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121101 Address after: 402260 Chongqing city Binjiang Jiangjin Jijiang Road West No. 366 Patentee after: Chongqing Electric Power Co.,Ltd. Jiangjin Power Supply Bureau Patentee after: State Grid Corporation of China Address before: 402260 Chongqing city Binjiang Jiangjin Jijiang Road West No. 366 Patentee before: Chongqing Electric Power Co.,Ltd. Jiangjin Power Supply Bureau |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20160609 |