CN112103900A - Prefabricated fusion-splicing terminal and manufacturing process thereof - Google Patents
Prefabricated fusion-splicing terminal and manufacturing process thereof Download PDFInfo
- Publication number
- CN112103900A CN112103900A CN202010773137.6A CN202010773137A CN112103900A CN 112103900 A CN112103900 A CN 112103900A CN 202010773137 A CN202010773137 A CN 202010773137A CN 112103900 A CN112103900 A CN 112103900A
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- Prior art keywords
- stress cone
- cone insulator
- insulator
- semi
- terminal
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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
- H02G15/064—Cable terminating boxes, frames or other structures with devices for relieving electrical stress
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
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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
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Cable Accessories (AREA)
- Processing Of Terminals (AREA)
Abstract
The invention discloses a prefabricated welding type terminal and a manufacturing process thereof. Before the assembly of the on-site cable environment, the terminal is prefabricated, so that the workload in the cable environment is greatly reduced; the semi-conductive body is electrically connected with the semi-conductive shielding body of the cable, and the semi-conductive body can disperse and homogenize an electric field at the terminal of the high-voltage cable, so that the safety and the reliability of the high-voltage cable are guaranteed.
Description
Technical Field
The invention relates to high-voltage power accessories, in particular to a prefabricated fusion-spliced terminal and a manufacturing process thereof.
Background
A high voltage cable is a kind of power cable, which means a power cable for transmitting 10kv or more, and is widely used for power transmission and distribution. In the practical application of the high-voltage cable, the electric field at the position of the terminal of the high-voltage cable is concentrated, and the electric field dispersion and homogenization are completed through the terminal of the cable. Therefore, an accessory is required at the end of the high voltage cable to disperse and homogenize the electric field so that the concentrated field strength can be restored to normal electrical operation.
High voltage cables are typically laid in relatively confined spaces such as pits, tunnels, overhead and the like. Most of the structural members of the accessory for connecting to the high-voltage cable terminal need to be prepared in advance, and the accessory can be directly and quickly welded with the high-voltage cable terminal on site.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a prefabricated welding type terminal which can be prefabricated in advance, reduce the workload in a high-voltage cable environment, disperse and homogenize the electric field of the high-voltage cable terminal and ensure the safety and reliability of the high-voltage cable.
A fusion splice termination according to an embodiment of the first aspect of the present invention includes a first stress cone insulator configured to receive a cable termination, a semiconductor body received on an outer wall of the first stress cone insulator, the semiconductor body configured as a stress cone, and a second stress cone insulator integrally connected to the first stress cone insulator, the semiconductor body being sealed in a combination of the first stress cone insulator and the second stress cone insulator, the semiconductor body, the first stress cone insulator, and the second stress cone insulator being fusion bonded and cross-linked.
According to the prefabricated fusion-spliced terminal disclosed by the embodiment of the invention, the terminal is prefabricated before the terminal is assembled in a cable environment, so that the working strength in the cable environment is greatly reduced; the semi-conductive body is electrically connected with the semi-conductive shielding body of the cable, the curve form distribution of the stress cone conforms to the electric field distribution rule, the semi-conductive body can disperse and homogenize the electric field at the terminal of the high-voltage cable, and the safety and the reliability of the high-voltage cable are guaranteed.
According to some embodiments of the invention, the first stress cone insulator, the body insulator of the cable and the second stress cone insulator are made of the same material. Structural components such as the first stress cone insulator, the semi-conductor, the second stress cone insulator and the like are made in a factory and are welded and installed on site; the cable has the advantages of good fusion with the cable body, no interface air gap, high breakdown strength, temperature resistance level consistent with that of the cable, and insulation characteristic equal to that of the cable body.
According to some embodiments of the invention, the semi-conductive body is made of the same material as the semi-conductive layer of the cable. The semi-conductor of the terminal is easy to fuse with the cable semiconductor, and is well insulated and combined with the cable, so that the breakdown-resistant field strength of the cable is improved.
According to some embodiments of the present invention, the first stress cone insulator is provided with a connection hole, and the connection hole extends along an axial direction of the first stress cone insulator and penetrates through the first stress cone insulator.
According to some embodiments of the invention, the flared end of the semiconductor body is provided as a first ring flange with the end of the stress cone of the semiconductor body extending radially outward, the combination being provided with a second ring flange for encasing the first ring flange.
According to a second aspect of the invention, the manufacturing process of the prefabricated welding type terminal comprises the following steps:
blank manufacturing, namely manufacturing a blank of a first stress cone insulator;
manufacturing a semi-conductor, namely manufacturing the semi-conductor in a stress cone;
processing a blank, namely processing the outer wall of the blank to obtain a first stress cone insulator, so that the outer wall of the first stress cone insulator has the shape corresponding to the stress cone of the semi-conductor, and the semi-conductor can be sleeved on the outer wall of the first stress cone insulator;
coating, namely coating a material on the outer wall of the semi-conductive body, wherein the material and the first stress cone insulator are connected into a whole;
and hot melting and pressing, namely wrapping and pressing the blank block obtained in the wrapping step by using a mold, heating the mold, cooling the mold to form a second stress cone insulator, sealing the semi-conductor in a combination of the first stress cone insulator and the second stress cone insulator, and adhering the first stress cone insulator and the second stress cone insulator to the semi-conductor.
The manufacturing process of the prefabricated welding type terminal provided by the embodiment of the invention at least has the following beneficial effects: before the terminal is assembled in a cable environment, the terminal is prefabricated, so that the workload in the cable construction environment is greatly reduced; the semi-conductive body is electrically connected with the semi-conductive shielding body of the cable, and the semi-conductive body can disperse and homogenize an electric field at the terminal of the high-voltage cable, so that the safety and the reliability of the high-voltage cable are guaranteed.
According to some embodiments of the invention, a connection hole is drilled in the first stress cone insulator, the connection hole extending in an axial direction of the first stress cone insulator and through the first stress cone insulator.
According to some embodiments of the invention, the semiconductor body, the first stress cone insulator outer wall, and the second stress cone insulator outer wall conform to a stress curve.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of a first stress cone insulator, a semiconductor, and the second stress cone insulator as fusion bonded and cross-linked in accordance with an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the structure shown in FIG. 1;
FIG. 3 is a schematic structural view of a first stress cone insulator, a semiconductor, and the second stress cone insulator when they are not in combination;
FIG. 4 is a cross-sectional view of the structure shown in FIG. 3;
FIG. 5 is a process assembly flow diagram of a first stress cone insulator, a semiconductor, and the second stress cone insulator;
fig. 6 is a schematic view of the pre-cast fusion splice type terminal after it has been fused to the end of a cable.
The combination 100, a first stress cone insulator 110, a connection hole 111, a second stress cone insulator 120, a second annular flange 130;
a semiconductor body 200, a first ring flange 210.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 to 4 and 6, a prefabricated fused terminal according to an embodiment of the first aspect of the present invention includes a first stress cone insulator 110, a semiconductor body 200 and a second stress cone insulator 120, wherein the first stress cone insulator 110 is adapted to receive a cable terminal, the semiconductor body 200 is received on an outer wall of the first stress cone insulator 110, the semiconductor body 200 is configured as a stress cone, the second stress cone insulator 120 is integrally connected to the first stress cone insulator 110, the semiconductor body 200 is sealed in a combined body 100 of the first stress cone insulator 110 and the second stress cone insulator 120, and the semiconductor body 200, the first stress cone insulator 110 and the second stress cone insulator 120 are fusion-bonded and cross-linked.
The direction in which the semiconductor body 200 is fitted into the outer wall of the first stress cone insulator 110 is referred to as the V direction in fig. 3 and 4.
The first stress cone insulator 110 and the second stress cone insulator 120 are both attached to the semiconductor body 200, i.e., the first stress cone insulator 110 and the second stress cone insulator 120 are attached to the walls of the semiconductor body 200 as if they were elongated above it.
The prefabricated fusion-spliced type terminal may be of two types, one in which the connection hole 111 has been directly processed, and the other in which the connection hole 111 is not prefabricated, and the connection hole 111 is processed after the specification of the connected cable is confirmed. The high-voltage cable terminal is connected into the connecting hole in series to obtain an assembly body; the assembly is wrapped and pressed in a mold and heated, after cooling, the first stress cone insulator 110 conforms to the outer wall of the cable as it grows on.
The first stress cone insulator and the semi-conducting body are arranged according to an electric stress structure, and electric stress is uniformly distributed and kept at a certain pressure level according to the stress cone, so that the working stability of the cable terminal is ensured.
The prefabricated welding type terminal provided by the embodiment of the invention at least has the following beneficial effects: before the terminal is assembled in a cable environment, the terminal is prefabricated, so that the workload in the cable environment is greatly reduced; the semi-conductive body 200 is to be electrically connected to the semi-conductive shield of the cable, and the semi-conductive body 200 can disperse and homogenize the electric field at the terminal of the high-voltage cable, thereby ensuring the safety and reliability of the high-voltage cable.
In some embodiments of the present invention, the first stress cone insulator 110, the body insulation of the cable, and the second stress cone insulator 120 are made of the same material. Structural components such as the first stress cone insulator 110, the semi-conductor 200 and the second stress cone insulator 120 are made in a factory and are welded and installed on site; the cable has the advantages of good fusion with the cable body, no interface air gap, high breakdown strength, temperature resistance level consistent with that of the cable, and insulation characteristic equal to that of the cable body.
In some embodiments of the invention, the semi-conductive body 200 is made of the same material as the semi-conductive layer of the cable. The cable is easy to fuse with a cable semiconductor, is well combined with the cable insulation, and improves the breakdown-resistant field strength of the cable.
In some embodiments of the present invention, the first stress cone insulator 110 is opened with a connection hole 111, and the connection hole 111 extends along the axial direction of the first stress cone insulator 110 and penetrates through the first stress cone insulator 110.
In some embodiments of the invention, the flared end of the semiconductor body 200 is provided as a first ring flange 210 with the end of the stress cone of the semiconductor body 200 extending radially outward, and the combination 100 is provided with a second ring flange 130 for encasing the first ring flange 210.
Referring to fig. 5, a process for fabricating a prefabricated fused terminal according to a second aspect of the present invention includes the steps of:
blank manufacturing, namely manufacturing a blank of the first stress cone insulator 110;
manufacturing a semiconductor 200, namely manufacturing the semiconductor 200 in a stress cone;
processing a blank, namely processing the outer wall of the blank to obtain a first stress cone insulator 110, so that the outer wall of the first stress cone insulator 110 has the shape corresponding to the stress cone of the semiconductor body 200, and the semiconductor body 200 can be sleeved on the outer wall of the first stress cone insulator 110;
coating, namely coating materials on the outer wall of the semi-conductor 200, wherein the materials are connected with the first stress cone insulator 110 into a whole;
and hot melting and pressing, namely wrapping and pressing the blank block obtained in the wrapping step by using a mould, heating the mould, cooling the material to form a second stress cone insulator 120, sealing the semi-conductor 200 in the combined body 100 of the first stress cone insulator 110 and the second stress cone insulator 120, and adhering the first stress cone insulator 110 and the second stress cone insulator 120 to the semi-conductor 200.
The manufacturing process of the prefabricated welding type terminal provided by the embodiment of the invention at least has the following beneficial effects: before the terminal is assembled in a cable environment, the terminal is prefabricated, so that the workload in the cable environment is greatly reduced; the semi-conductive body 200 is to be electrically connected to the semi-conductive shield of the cable, and the semi-conductive body 200 can disperse and homogenize the electric field at the terminal of the high-voltage cable, thereby ensuring the safety and reliability of the high-voltage cable.
The outer wall of the processed blank is generally selected from lathes, mills and the like
In the hot melting and pressing process, the pressure is 2.5-4.5MPa, the temperature is 190-.
In some embodiments of the present invention, a connection hole 111 is drilled in the first stress cone insulator 110, the connection hole 111 extending in an axial direction of the first stress cone insulator 110 and penetrating the first stress cone insulator 110.
In some embodiments of the present invention, the semiconductor 200, the outer wall of the first stress cone insulator 110, and the outer wall of the second stress cone insulator 120 conform to a stress curve.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (8)
1. A prefabricated fusion splice type terminal for connecting a terminal of a cable, comprising:
a first stress cone insulator for socketing the cable termination;
the semi-conductor is sleeved on the outer wall of the first stress cone insulator and is arranged as a stress cone;
and a second stress cone insulator integrally connected to the first stress cone insulator, wherein the semiconductor body is sealed in a combination of the first stress cone insulator and the second stress cone insulator, and the semiconductor body, the first stress cone insulator, and the second stress cone insulator are fusion bonded and cross-linked.
2. The pre-fabricated fused terminal of claim 1 wherein the first stress cone insulator, the cable body insulator, and the second stress cone insulator are made of the same material.
3. The pre-cast fusion terminal of claim 1 or 2, wherein the semi-conductive body is made of the same material as the semi-conductive layer of the cable.
4. The pre-fabricated fused terminal of claim 1 or 2 wherein the first stress cone insulator defines a connection hole extending axially through the first stress cone insulator.
5. The pre-cast fusion terminal of claim 1 or 2, wherein the flared end of the semiconductor body is provided as a first ring flange with the end of the stress cone of the semiconductor body extending radially outward, the combination being provided with a second ring flange for encasing the first ring flange.
6. A manufacturing process of a prefabricated welding type terminal is characterized by comprising the following steps:
blank manufacturing, namely manufacturing a blank of a first stress cone insulator;
manufacturing a semi-conductor, namely manufacturing the semi-conductor in a stress cone;
processing a blank, namely processing the outer wall of the blank to obtain a first stress cone insulator, so that the semi-conductor can be sleeved on the outer wall of the first stress cone insulator;
coating, namely coating a material on the outer wall of the semi-conductive body, wherein the material and the first stress cone insulator are connected into a whole;
and hot melting and pressing, namely wrapping and pressing the blank block obtained in the wrapping step by using a mold, heating the mold, cooling the mold to form a second stress cone insulator, sealing the semi-conductor in a combination of the first stress cone insulator and the second stress cone insulator, and adhering the first stress cone insulator and the second stress cone insulator to the semi-conductor.
7. The process of making a pre-fabricated fused terminal of claim 6 wherein a connection hole is drilled in the first stress cone insulator, the connection hole extending axially of the first stress cone insulator and through the first stress cone insulator.
8. The process of making a pre-fabricated fused terminal of claim 6, wherein the semiconductor body, the first stress cone insulator outer wall, and the second stress cone insulator outer wall conform to a stress curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010773137.6A CN112103900A (en) | 2020-08-04 | 2020-08-04 | Prefabricated fusion-splicing terminal and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010773137.6A CN112103900A (en) | 2020-08-04 | 2020-08-04 | Prefabricated fusion-splicing terminal and manufacturing process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112103900A true CN112103900A (en) | 2020-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010773137.6A Pending CN112103900A (en) | 2020-08-04 | 2020-08-04 | Prefabricated fusion-splicing terminal and manufacturing process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113659494A (en) * | 2021-08-18 | 2021-11-16 | 瑞邦电力科技有限公司 | Preparation process of 10-35kV welding type cross-linked cable terminal |
-
2020
- 2020-08-04 CN CN202010773137.6A patent/CN112103900A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113659494A (en) * | 2021-08-18 | 2021-11-16 | 瑞邦电力科技有限公司 | Preparation process of 10-35kV welding type cross-linked cable terminal |
| CN113659494B (en) * | 2021-08-18 | 2023-01-31 | 瑞邦电力科技有限公司 | Preparation process of 10-35kV welding type cross-linked cable terminal |
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Inventor after: Xia Xin Inventor after: Xia Yunjie Inventor after: Liu Xia Inventor after: Lv Dianquan Inventor after: Luo Jihong Inventor after: LAN bin Inventor before: Liu Xia Inventor before: Lv Dianquan Inventor before: Xia Yunjie Inventor before: Luo Jihong Inventor before: LAN bin Inventor before: Fang Neng |