CN108521112B - High-voltage dry-type insulation power cable equipment terminal - Google Patents
High-voltage dry-type insulation power cable equipment terminal Download PDFInfo
- Publication number
- CN108521112B CN108521112B CN201810477576.5A CN201810477576A CN108521112B CN 108521112 B CN108521112 B CN 108521112B CN 201810477576 A CN201810477576 A CN 201810477576A CN 108521112 B CN108521112 B CN 108521112B
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- Prior art keywords
- cable
- insulating sleeve
- fixing plate
- insulating
- exposed section
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/02—Cable terminations
- H02G15/06—Cable terminating boxes, frames or other structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/02—Cable terminations
- H02G15/06—Cable terminating boxes, frames or other structures
- H02G15/064—Cable terminating boxes, frames or other structures with devices for relieving electrical stress
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- Cable Accessories (AREA)
Abstract
The invention relates to the technical field of cable terminals, in particular to a high-voltage dry-type insulated power cable equipment terminal, which comprises an insulating sleeve, a stress cone arranged in the insulating sleeve, a tail pipe arranged at the inlet end of the insulating sleeve, a connecting hardware fitting arranged at the outlet end of the insulating sleeve and a connecting contact arranged in the connecting hardware fitting, wherein the tail pipe is arranged at the inlet end of the insulating sleeve; the positioning ring is ingeniously fixed on the exposed section of the insulating layer of the cable, so that the insulating layer of the cable can be effectively prevented from retracting, the positioning and shape-preserving effects on the stress cone are achieved, the phenomenon that the inside of the terminal is discharged or even punctured due to the retraction of the insulating layer of the cable is avoided, and the safety performance of the terminal is high; in addition, the structure for preventing the cable from falling relative to the terminal has no open fire or high temperature in the installation process, is safe and reliable, is environment-friendly, and is particularly suitable for high-risk places such as coal mines, chemical enterprises, high-requirement transformer substations and the like.
Description
Technical Field
The invention relates to the technical field of cable terminals, in particular to a high-voltage dry-type insulated power cable equipment terminal.
background
Along with the expansion of urban power grid construction, the demand of a corresponding cable terminal for matching with GIS or transformer equipment is synchronously increased, at present, the existing cable terminal mainly comprises an insulating sleeve (an epoxy female die), a stress cone and a hardware fitting, wherein the stress cone and the hardware fitting are positioned in the insulating sleeve;
This type of cable termination is found with use to have the following drawbacks: the cable can generate heat and cool off at the in-process of circular telegram outage, receive the influence of expend with heat and contract with cold and cable stress itself, cable insulation layer and cable core can produce relative displacement, can appear more obvious displacement in cable insulation layer fracture department generally, if the displacement appears, so the opening of cable shells the change that the size just becomes mutually, this electric field distribution that will greatly influence the product to influence product property ability, partial discharge appears, cause the breakdown even, great potential safety hazard has.
Disclosure of Invention
the technical problem to be solved by the invention is as follows: in order to solve the problems that in the prior art, a cable terminal can expand with heat and contract with cold due to heating and cooling in the process of powering on and powering off, the cable is matched with the influence of the stress of the cable when expanding with heat and contracting with cold, so that a cable insulating layer and a cable core are easy to generate relative displacement, and once the cable insulating layer and the cable core are capable of generating relative displacement, the electric field distribution in the terminal can be greatly influenced, so that the terminal is easy to generate partial discharge and even breakdown, and the high potential safety hazard is caused, the high-voltage dry-type insulated power cable equipment terminal is provided, and the high-voltage dry-type insulated power cable equipment terminal can be suitable for 245KV transformers or GIS (gas insulated switchgear.
The technical scheme adopted by the invention for solving the technical problems is as follows: a high-voltage dry-type insulated power cable equipment terminal comprises an insulating sleeve, a stress cone arranged in the insulating sleeve, a tail pipe arranged at the inlet end of the insulating sleeve, a connecting hardware fitting arranged at the outlet end of the insulating sleeve and a connecting contact arranged in the connecting hardware fitting;
The cable penetrates through the tail pipe and the insulating sleeve, a section of core exposed section exposed out of the front end of the cable, and a section of insulating layer exposed section exposed out of the part of the cable adjacent to the core exposed section;
The cable core exposed section is fixed in the connecting contact, the stress cone is sleeved on the insulating layer exposed section of the cable, a positioning ring is arranged in the outlet end of the insulating sleeve, the positioning ring is fixed on the insulating layer exposed section, the front end face of the stress cone is in contact with the positioning ring, and the connecting hardware fitting can limit the positioning ring to move towards the outlet end direction of the insulating sleeve.
Ingenious adoption screw in this scheme is fixed the holding ring on the insulating layer exposes the section, the holding ring is fixed the insulating layer of cable and is exposed the back on the section, not only can carry on spacingly to the stress cone, prevent that the stress cone from producing to warp and sliding into link fitting in, the holding ring exposes the section with the insulating layer of cable and is connected the back simultaneously, utilize the holding ring to support on the stress cone, can also avoid the cable at the in-process of circular telegram outage because of the condition that the insulating layer of the cable that expend with heat and contract with cold takes place returns, thereby prevent to appear partial discharge in the terminal, cause the phenomenon of puncturing even.
Furthermore, the positioning ring is fixed on the exposed section of the insulating layer through a screw, the nut end of the screw abuts against the positioning ring, and the threaded end of the screw is screwed into the exposed section of the insulating layer.
furthermore, the material of holding ring is the aluminum alloy.
the cable is easy to fall due to the influence of the self weight and the electrodynamic force, once the cable falls, the matching of the cable and the terminal is deviated, partial discharge occurs, the product performance and the service life are influenced, even the cable falls off the terminal in serious cases, in order to prevent the cable from falling easily due to the influence of the self weight and the electrodynamic force, a plurality of manufacturers use a lead sealing process to solve the problem at present, namely, lead bars are burnt and dissolved by naked fire and then coated on an aluminum sheath of the cable, and after continuous stacking, the aluminum sheath of the cable is connected with a tail pipe of the terminal, however, the lead sealing process needs the naked fire and has higher temperature, so the lead sealing process cannot be suitable for high-risk places such as coal mines, chemical enterprises and high-requirement transformer substations;
furthermore, a bulge is arranged outside the insulating outer sheath of the cable, an outer fixing plate and an inner fixing plate are respectively arranged at the front end and the rear end of the bulge, the outer fixing plate and the inner fixing plate are clamped on two sides of the bulge through bolt assemblies, the outer fixing plate is fixed at the rear end of the tail pipe, and the outer fixing plate and the inner fixing plate are clamped and fixed on the bulge of the cable to be combined with the cable into a whole, so that the outer fixing plate and the tail pipe are relatively fixed, and the cable is prevented from being influenced by self weight and electrodynamic force.
Furthermore, the bulges are formed by winding the glass fiber tape soaked with the epoxy resin adhesive outside the insulating outer sheath and solidifying the glass fiber tape, and the bulges are formed by combining the epoxy resin adhesive and the glass fiber tape, so that the process of forming the bulges has no open fire or high temperature, is safe, reliable and environment-friendly, and can be suitable for high-risk places such as coal mines, chemical enterprises and high-requirement transformer substations.
Furthermore, the outer fixing plate and the inner fixing plate are both annular, and are sleeved outside the insulating outer sheath of the cable.
further, insulation support's entry end internal fixation has spring closing device, spring closing device includes terminal surface ring sum spring, the terminal surface ring is located insulation support, the one end of spring is supported on the terminal surface ring, and the other end supports the rear end at the stress cone, the terminal surface ring supports on the tail pipe.
the invention has the beneficial effects that: the positioning ring is skillfully fixed on the exposed section of the insulating layer of the cable, so that the insulating layer of the cable can be effectively prevented from retracting, the positioning and shape-preserving effects on the stress cone are achieved, the phenomenon that the inside of the terminal is discharged or even punctured due to the retraction of the insulating layer of the cable is avoided, and the safety performance of the terminal is high; in addition, the structure for preventing the cable from falling relative to the terminal has no open fire or high temperature in the installation process, is safe and reliable, is environment-friendly, and is particularly suitable for high-risk places such as coal mines, chemical enterprises, high-requirement transformer substations and the like.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of a high voltage dry insulation power cable plant terminal of the present invention;
FIG. 2 is an enlarged partial schematic view of A of FIG. 1;
FIG. 3 is an enlarged partial schematic view of B of FIG. 1;
Fig. 4 is a partially enlarged schematic view of C in fig. 1.
in the figure: 1. the cable comprises, by weight, 1-1 parts of a cable, an insulating outer sheath, 1-2 parts of an aluminum sheath exposed section, 1-3 parts of an insulating shielding layer exposed section, 1-4 parts of an insulating layer exposed section, 1-5 parts of a wire core exposed section, 2 parts of an insulating sleeve, 3 parts of a stress cone, 4 parts of a tail pipe, 5 parts of a connecting hardware fitting, 6 parts of a connecting contact, 7 parts of a positioning ring, 8 parts of a screw, 9 parts of a protrusion, 10 parts of an outer fixing plate, 11 parts of an inner fixing plate, 12 parts of a bolt assembly, 13 parts of an end face ring, 14 parts of a spring, 15 parts of a.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams illustrating the basic structure of the present invention only in a schematic manner, and thus show only the constitution related to the present invention, and directions and references (e.g., upper, lower, left, right, etc.) may be used only to help the description of the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
Example 1
As shown in fig. 1-4, a high-voltage dry-type insulated power cable equipment terminal includes an insulating sleeve 2, a stress cone 3 disposed in the insulating sleeve 2, a tail pipe 4 disposed at an inlet end of the insulating sleeve 2, a link fitting 5 disposed at an outlet end of the insulating sleeve 2, and a connection contact 6 disposed in the link fitting 5, wherein the tail pipe 4 and the link fitting 5 are respectively fixed at two ends of the insulating sleeve 2;
the cable 1 passes through the tail pipe 4 and the insulating sleeve 2, a section of core exposed section 1-5 exposed at the front end of the cable 1, and a section of insulating layer exposed section 1-4 exposed at the adjacent part of the core exposed section 1-5 on the cable 1;
As shown in fig. 4, the exposed core segment 1-5 is fixed in the connection contact 6, the stress cone 3 is sleeved on the exposed insulating layer segment 1-4 of the cable 1, the outlet end of the insulating sleeve 2 is provided with a positioning ring 7, the positioning ring 7 is sleeved on the front end circumference of the exposed insulating layer segment 1-4, the positioning ring 7 is fixed on the exposed insulating layer segment 1-4 through a screw 8, the nut end of the screw 8 is abutted on the positioning ring 7, the threaded end of the screw 8 is screwed into the exposed insulating layer segment 1-4, the front end face of the stress cone 3 is contacted with the positioning ring 7, the connection fitting 5 can limit the positioning ring 7 to move towards the outlet end direction of the insulating sleeve 2, and the contact mode of the positioning ring 7 and the connection fitting 5 can: the peripheral surface of the positioning ring 7 is in contact with the inner wall of the connecting hardware fitting 5, the contact surface of the positioning ring 7 and the connecting hardware fitting 5 is a conical surface, the large end of the conical surface is close to the stress cone 3, and the end face of one end, far away from the stress cone 3, of the positioning ring 7 can also be in contact with the connecting hardware fitting 5.
The positioning ring 7 is made of aluminum alloy.
As shown in fig. 2, a protrusion 9 is provided outside an insulating outer sheath 1-1 of a cable 1, an outer fixing plate 10 and an inner fixing plate 11 are respectively provided at front and rear ends of the protrusion 9, the outer fixing plate 10 and the inner fixing plate 11 are clamped at two sides of the protrusion 9 through a bolt assembly 12, the outer fixing plate 10 is fixed at a rear end of a tail pipe 4, the outer fixing plate 10 can be fixed at the rear end of the tail pipe 4 through gluing or screwing, the bolt assembly 12 can specifically include a stud and two nuts, the stud respectively penetrates through the outer fixing plate 10 and the inner fixing plate 11, the two nuts are screwed on the stud, and the two nuts respectively abut against outer sides of the outer fixing plate 10 and the inner fixing plate 11, the scheme utilizes the outer fixing plate 10 and the inner fixing plate 11 to be clamped and fixed on the protrusion 9 of the cable 1, so as to be integrated with the cable 1, and, further, the influence of the weight of the cable 1 and the electromotive force is prevented from occurring.
since the cable 1 itself has no protrusion 9, it becomes important how to mold the protrusion 9 with a certain mechanical strength on the cable 1 without open fire and low temperature, and the solution provided in the present invention is as follows: the bulges 9 are formed by winding the glass fiber tape soaked with the epoxy resin adhesive outside the insulating outer sheath 1-1 and solidifying the glass fiber tape, the bulges 9 are formed by combining the epoxy resin adhesive and the glass fiber tape, and the process of forming the bulges 9 has no open fire or high temperature, is safe, reliable and environment-friendly, and is suitable for high-risk places such as coal mines, chemical enterprises and high-requirement transformer substations.
The outer fixing plate 10 and the inner fixing plate 11 are both annular, and the outer fixing plate 10 and the inner fixing plate 11 are both sleeved outside the insulating outer sheath 1-1 of the cable 1.
As shown in fig. 3, a spring pressing device is fixed in the inlet end of the insulating sleeve 2, the spring pressing device includes an end surface ring 13 and a spring 14, the end surface ring 13 is located in the insulating sleeve 2, one end of the spring 14 abuts against the end surface ring 13, the other end abuts against the rear end of the stress cone 3, the end surface ring 13 abuts against the tail pipe 4, the spring 14 in the spring pressing device of the cable 1 presses the stress cone 3 against the positioning ring 7, and the connection fitting 5 can abut against the positioning ring 7 to prevent the connection fitting 5 from displacing.
the cable 1 is also stripped with an aluminum sheath exposed section 1-2 and an insulation shielding layer exposed section 1-3, the insulation layer exposed section 1-4 and a wire core exposed section 1-5 are sequentially arranged and distributed in a step shape, wherein an end surface ring 13 is connected with the aluminum sheath exposed section 1-2 through a copper braided belt 15, the end surface ring 13 is sleeved on the outer side of the insulation shielding layer exposed section 1-3, the front end of the insulation shielding layer exposed section 1-3 is positioned in a stress cone 3, and a positioning ring 7 is close to a port between the insulation layer exposed section 1-4 and the wire core exposed section 1-5.
In the embodiment, the positioning ring 7 is fixed on the exposed section 1-4 of the insulating layer by the screw 8, so that the positioning ring 7 and the exposed section 1-4 of the insulating layer of the cable 1 are combined into a whole, the positioning ring 7 can be used for limiting the stress cone 3 on one hand, the stress cone 3 is prevented from being deformed and then sliding into the connecting hardware fitting 5 under the long-term pressure of the spring pressing device, and the positioning ring has the functions of positioning and shape keeping on the stress cone 3, on the other hand, after the positioning ring 7 is fixed with the exposed section 1-4 of the insulating layer of the cable 1, the insulating layer of the cable 1 can be prevented from retracting, the displacement of the insulating layer relative to a wire core caused by expansion and contraction due to heating and cooling in the power-on and power-off processes of the cable 1 is avoided, the accuracy of the distribution of an.
in light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that numerous changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. A high-voltage dry-type insulated power cable equipment terminal comprises an insulating sleeve (2), a stress cone (3) arranged in the insulating sleeve (2), a tail pipe (4) arranged at the inlet end of the insulating sleeve (2), a connecting fitting (5) arranged at the outlet end of the insulating sleeve (2) and a connecting contact (6) arranged in the connecting fitting (5);
The cable (1) penetrates through the tail pipe (4) and the insulating sleeve (2), a core wire exposed section (1-5) is exposed at the front end of the cable (1), and an insulating layer exposed section (1-4) is exposed at the position, adjacent to the core wire exposed section (1-5), of the cable (1);
The cable core exposed section (1-5) is fixed in the connecting contact (6), the stress cone (3) is sleeved on the insulating layer exposed section (1-4) of the cable (1), and the cable core exposed section is characterized in that: a positioning ring (7) is arranged in the outlet end of the insulating sleeve (2), the positioning ring (7) is fixed on the exposed section (1-4) of the insulating layer, the front end face of the stress cone (3) is in contact with the positioning ring (7), and the connecting hardware fitting (5) can limit the positioning ring (7) to move towards the outlet end direction of the insulating sleeve (2);
The positioning ring (7) is fixed on the exposed section (1-4) of the insulating layer through a screw (8), the nut end of the screw (8) abuts against the positioning ring (7), and the threaded end of the screw (8) is screwed into the exposed section (1-4) of the insulating layer.
2. The high voltage dry-insulated power cable equipment terminal according to claim 1, characterized in that: the positioning ring (7) is made of aluminum alloy.
3. The high voltage dry-insulated power cable equipment terminal according to claim 1, characterized in that: the cable is characterized in that a bulge (9) is arranged outside an insulating outer sheath (1-1) of the cable (1), an outer fixing plate (10) and an inner fixing plate (11) are respectively arranged at the front end and the rear end of the bulge (9), the outer fixing plate (10) and the inner fixing plate (11) are clamped on two sides of the bulge (9) through bolt assemblies (12), and the outer fixing plate (10) is fixed at the end part of the rear end of a tail pipe (4).
4. A high voltage dry-type insulated power cable equipment terminal according to claim 3, characterized in that: the bulges (9) are formed by winding a glass fiber tape soaked with epoxy resin adhesive outside the insulating outer sheath (1-1) and solidifying.
5. A high voltage dry-type insulated power cable equipment terminal according to claim 3, characterized in that: the outer fixing plate (10) and the inner fixing plate (11) are both annular, and the outer fixing plate (10) and the inner fixing plate (11) are both sleeved outside an insulating outer sheath (1-1) of the cable (1).
6. The high voltage dry-insulated power cable equipment terminal according to claim 1, characterized in that: the entry end internal fixation of insulating sleeve (2) has spring hold-down device, spring hold-down device includes terminal surface ring (13) and spring (14), terminal surface ring (13) are located insulating sleeve (2), the one end of spring (14) is supported on terminal surface ring (13), and the other end supports the rear end at stress cone (3), terminal surface ring (13) are supported on tail pipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810477576.5A CN108521112B (en) | 2018-05-18 | 2018-05-18 | High-voltage dry-type insulation power cable equipment terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810477576.5A CN108521112B (en) | 2018-05-18 | 2018-05-18 | High-voltage dry-type insulation power cable equipment terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108521112A CN108521112A (en) | 2018-09-11 |
| CN108521112B true CN108521112B (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810477576.5A Active CN108521112B (en) | 2018-05-18 | 2018-05-18 | High-voltage dry-type insulation power cable equipment terminal |
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| Country | Link |
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| CN (1) | CN108521112B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111327013B (en) * | 2018-12-14 | 2021-06-04 | 香港浩岳国际有限公司 | Cable terminal |
| CN115083682B (en) * | 2022-07-13 | 2024-02-23 | 昆山裕莱祥电子科技有限公司 | New forms of energy car pencil of riding instead of walk |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO167618C (en) * | 1989-03-20 | 1991-11-20 | Alcatel Stk As | SURVIVAL DEVICE FOR ELECTRICAL APPLIANCES. |
| CN202183581U (en) * | 2011-08-26 | 2012-04-04 | 长园电力技术有限公司 | Cable GIS terminal |
| CN204118674U (en) * | 2014-10-20 | 2015-01-21 | 陈燕 | Prefabricated transformer cable jockey |
| CN207150140U (en) * | 2017-08-04 | 2018-03-27 | 江苏中天科技电缆附件有限公司 | A kind of new no epoxy bushing GIS terminal |
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2018
- 2018-05-18 CN CN201810477576.5A patent/CN108521112B/en active Active
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| Publication number | Publication date |
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| CN108521112A (en) | 2018-09-11 |
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Address after: 213000 No. 128 Dongfang East Road, Changzhou City, Jiangsu Province Patentee after: Xinchengrui (Changzhou) Power Technology Co., Ltd Address before: 213025 No. 128, Dongfang East Road, Changzhou City, Jiangsu Province Patentee before: Changzhou ankaite power device Co., Ltd |