CN211088525U - Shrinkage joint for insulating tube bus - Google Patents
Shrinkage joint for insulating tube bus Download PDFInfo
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- CN211088525U CN211088525U CN201922245710.1U CN201922245710U CN211088525U CN 211088525 U CN211088525 U CN 211088525U CN 201922245710 U CN201922245710 U CN 201922245710U CN 211088525 U CN211088525 U CN 211088525U
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Abstract
The utility model relates to a cold-contraction joint for an insulating tube bus, which comprises a cold-contraction joint main body, wherein the cold-contraction joint main body is a hollow cylinder combined structure with openings at two ends, two ends of the cold-contraction joint main body are in a conical shape, and the caliber of the cold-contraction joint main body is gradually reduced from the middle position of the cold-contraction joint main body to the end position of the cold-contraction joint main body; the hollow cylinder structure is formed by connecting two hollow cylinders in sequence, and the inner diameter of one hollow cylinder is larger than that of the other hollow cylinder; the cold-shrink joint main body sequentially comprises an outer shielding layer and a main insulating layer from outside to inside, inner electrode layers are further arranged on the inner side face of the main insulating layer, the inner electrode layers are respectively arranged at the two ends and the middle of the main insulating layer, and the inner electrode layers arranged at the end parts of the small-caliber hollow cylinders are in stress cone structures; and a supporting core rope and a copper cover which are in a hollow cylindrical structure are also arranged in the cold-shrink joint main body. The utility model has the advantages that: the utility model discloses life and electrical property can be improved.
Description
Technical Field
The utility model belongs to the technical field of the cable, in particular to insulating tube is shrinkage joint for generating line.
Background
The tubular bus is a power transmission device for efficiently transmitting high-voltage current, and compared with the traditional rectangular bus, the tubular bus has the characteristics of good skin effect, large unit section current-carrying capacity, good heat dissipation conditions, large allowable stress, large span, high mechanical strength, strong electrical insulating property, high stability of main insulating materials, reasonable insulating process and the like, and can effectively ensure the power supply reliability of a power transmission and transformation network. With the rapid and steady increase of national economy, the electricity consumption of society rises linearly, so that the main transformer capacity of a transformer substation is continuously increased, the rated current of the low voltage line side of the main transformer is increased, and more tubular buses are used by power departments.
Through retrieval, patent CN 209119389U discloses a cold-shrink intermediate head for an insulating tube bus, the intermediate head is used for connecting a pair of insulating tube buses after butt joint, the cold-shrink intermediate head comprises a cold-shrink joint main body, the cold-shrink joint main body is a hollow cylindrical structure with two open ends, the two ends of the cold-shrink joint main body are in a conical shape, the caliber of the cold-shrink joint main body is gradually reduced from the middle position of the cold-shrink joint main body to the end position of the cold-shrink joint main body, two ends of the cold-shrink joint main body are respectively provided with an annular bulge, and the inner wall of the cold-shrink joint main body is further provided with a; during the assembly, with a pair of insulating tube generating line butt joint back, the direct assembly that can realize the insulating tube generating line with the shrinkage intermediate head suit in the outer end of butt joint department, unusual convenience, in addition, adopt the shrinkage to connect to possess the high tensile force, utilize this kind of elasticity tensile force to compress tightly the insulating tube generating line, guarantee the firm of assembly, but the shrinkage intermediate head of this structure has certain defect: 1. the cold-shrink joint main body and the silicon rubber semi-conductive shielding layer can not be tightly attached to each other, so that a certain air gap exists, partial discharge is different, and the service life is further greatly reduced; 2. the electrical performance is general.
Therefore, it is necessary to develop a cold-shrink joint for an insulated tubular bus bar, which can improve the service life and the electrical performance.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an insulating tube is shrinkage joint for generating line that can improve life and electrical property.
In order to solve the technical problem, the utility model adopts the technical scheme that: the utility model provides an insulating tube is cold-shrink joint for generating line, this cold-shrink joint is used for connecting a pair of insulating tube generating line after the butt joint, and its innovation point lies in: comprises that
The cold-shrink joint comprises a cold-shrink joint main body, a cold-shrink joint main body and a cold-shrink joint body, wherein the cold-shrink joint main body is a hollow cylindrical combined structure with openings at two ends, two ends of the cold-shrink joint main body are in a conical shape, and the caliber of the cold-shrink joint main body is gradually reduced from the middle position of the cold-shrink joint main body to the end position of the cold-shrink joint main; the hollow cylinder structure is formed by connecting two hollow cylinders in sequence, and the inner diameter of one hollow cylinder is larger than that of the other hollow cylinder;
the cold-shrink joint main body sequentially comprises an outer shielding layer and a main insulating layer from outside to inside, inner electrode layers are further arranged on the inner side face of the main insulating layer, the inner electrode layers are respectively arranged at the two ends and the middle of the main insulating layer, and the inner electrode layers arranged at the end parts of the small-caliber hollow cylinders are in stress cone structures;
the support core rope and the copper cover which are in a hollow cylinder structure are arranged in the cold-shrink joint main body, the support core rope is arranged in the large-caliber hollow cylinder and is tightly attached to the inner electrode layer in the large-caliber hollow cylinder, and one end part of the support core rope extends out of the cold-shrink joint main body so as to be convenient for drawing out the support core rope; the copper cover is arranged in the middle of the cold-shrink joint main body, and one end of the copper cover is in lap joint with the inner electrode layer in the cold-shrink joint main body.
Further, the thickness of the inner electrode layer is 1/3-2/5 of the thickness of the cold-shrink joint main body.
Further, the thickness of the outer shielding layer in the cold-shrink joint main body is 1/5-1/4 of the thickness of the main insulating layer.
The utility model has the advantages that:
(1) the utility model discloses cold contraction joint for insulating tube generating line comprises an inner electrode layer, a main insulating layer and an outer shielding layer which are arranged inside and outside in sequence, so that the outer shielding, the main insulating layer and the inner electrode layer are tightly combined to avoid air gaps between all functional layers; meanwhile, the inner electrode layers are arranged in the middle and at the end of the main insulating layer, the inner electrode layer at one end is in a stress cone structure, and finite element analysis software is applied to optimize the stress cone curve to obtain an optimal stress control curve, so that the electric field intensity is effectively reduced, partial discharge from the middle to two sides is more uniform, and the insulating life is prolonged; in addition, the copper cover is arranged in the middle of the intermediate joint, can tightly cover the metal connecting pipe of the insulating pipe bus and is lapped with the inner electrode layer of the intermediate joint, so that partial discharge is reduced, the distribution shape of an electric field is uniform, the electrical performance is improved, and the service life is prolonged;
(2) the utility model discloses insulating tube is shrinkage joint for generating line still is provided with the support core rope that is hollow cylinder structure in the inside that the shrinkage connects the main part, and the insulating tube generating line is put on suitable position, takes out when supporting the core rope, and the insulating tube is contract promptly for the generating line and is hugged closely with insulating tube generating line surface, and the installation is easy, need not specialized tool or heating power.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the structure schematic diagram of the cold contraction joint for the insulated pipe bus of the present invention.
Detailed Description
The following examples are presented to enable those skilled in the art to more fully understand the present invention and are not intended to limit the scope of the present invention.
Examples
The cold-shrink joint for the insulated pipe bus of the embodiment is used for connecting a pair of butted insulated pipe buses, and comprises a cold-shrink joint main body 1, wherein the cold-shrink joint main body 1 is a hollow cylindrical combined structure with openings at two ends, two ends of the cold-shrink joint main body 1 are in a conical shape, and the caliber of the cold-shrink joint main body 1 is gradually reduced from the middle position of the cold-shrink joint main body 1 to the end position of the cold-shrink joint main body 1; the hollow cylinder structure is formed by connecting two hollow cylinders in sequence, and the inner diameter of one hollow cylinder is larger than that of the other hollow cylinder; the cold-shrink joint main body 1 sequentially comprises an outer shielding layer 11 and a main insulating layer 12 from outside to inside, an inner electrode layer 2 is further arranged on the inner side surface of the main insulating layer 12, the inner electrode layers 2 are respectively arranged at two ends and the middle of the main insulating layer, and the inner electrode layer 2 arranged at the end part of the small-caliber hollow cylinder is of a stress cone structure; the stress cone curve is optimally designed by using finite element analysis software, the optimal stress control curve is obtained, the electric field intensity is effectively reduced, partial discharge from the middle to two sides is more uniform, and the insulation life is prolonged.
A supporting core rope 3 and a copper cover 4 which are in a hollow cylindrical structure are further arranged inside the cold-shrink joint main body 1, the supporting core rope 3 is arranged inside the large-caliber hollow cylinder and is tightly attached to the inner electrode layer 2 inside the large-caliber hollow cylinder, and one end part of the supporting core rope 3 extends out of the cold-shrink joint main body 1, so that the supporting core rope 3 can be conveniently drawn out; the inside of the cold-shrink joint main body 1 is also provided with a supporting core rope 3 in a hollow cylindrical structure, the insulating tube bus is placed at a proper position, when the supporting core rope 3 is pulled out, the insulating tube bus is shrunk by the cold-shrink joint to be tightly attached to the surface of the insulating tube bus, the installation is easy, and no special tool or heating power is needed; copper sheathing 4 sets up in the middle part that the cold contraction connects main part 1, and the one end of copper sheathing 4 and the cold contraction connect 2 overlap joints of inner electrode layer in the main part 1 and set up, can closely cover on the metal takeover of insulating tube generating line to with 2 overlap joints of intermediate head inner electrode layer, thereby reduce partial discharge, even electric field distribution shape improves electrical property and running life.
As an example, in order to ensure better insulation performance, the thickness of each functional layer is strictly controlled, the thickness of the inner electrode layer 2 is 1/3-2/5 of the thickness of the cold-shrink joint main body 1, the thickness of the outer shielding layer 11 in the cold-shrink joint main body 1 is 1/5-1/4 of the thickness of the main insulation layer 12, specifically, the thickness of the outer shielding layer 11 is 1-2mm, and the thickness of the main insulation layer 12 is 5-8mm, and the thickness of the inner electrode layer 2 is 2-4 mm.
The basic principles and main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The utility model provides an insulating tube is cold-shrink joint for generating line, this cold-shrink joint is used for connecting a pair of insulating tube generating line after the butt joint, its characterized in that: comprises that
The cold-shrink joint comprises a cold-shrink joint main body, a cold-shrink joint main body and a cold-shrink joint body, wherein the cold-shrink joint main body is a hollow cylindrical combined structure with openings at two ends, two ends of the cold-shrink joint main body are in a conical shape, and the caliber of the cold-shrink joint main body is gradually reduced from the middle position of the cold-shrink joint main body to the end position of the cold-shrink joint main; the hollow cylinder structure is formed by connecting two hollow cylinders in sequence, and the inner diameter of one hollow cylinder is larger than that of the other hollow cylinder;
the cold-shrink joint main body sequentially comprises an outer shielding layer and a main insulating layer from outside to inside, inner electrode layers are further arranged on the inner side face of the main insulating layer, the inner electrode layers are respectively arranged at the two ends and the middle of the main insulating layer, and the inner electrode layers arranged at the end parts of the small-caliber hollow cylinders are in stress cone structures;
the support core rope and the copper cover which are in a hollow cylinder structure are arranged in the cold-shrink joint main body, the support core rope is arranged in the large-caliber hollow cylinder and is tightly attached to the inner electrode layer in the large-caliber hollow cylinder, and one end part of the support core rope extends out of the cold-shrink joint main body so as to be convenient for drawing out the support core rope; the copper cover is arranged in the middle of the cold-shrink joint main body, and one end of the copper cover is in lap joint with the inner electrode layer in the cold-shrink joint main body.
2. The cold-shrink joint for an insulated tubular busbar according to claim 1, wherein: the thickness of the inner electrode layer is 1/3-2/5 of the thickness of the cold-shrink joint main body.
3. The cold-shrink joint for an insulated tubular busbar according to claim 1 or 2, wherein:
the thickness of the outer shielding layer in the cold-shrink joint main body is 1/5-1/4 of the thickness of the main insulating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922245710.1U CN211088525U (en) | 2019-12-16 | 2019-12-16 | Shrinkage joint for insulating tube bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922245710.1U CN211088525U (en) | 2019-12-16 | 2019-12-16 | Shrinkage joint for insulating tube bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211088525U true CN211088525U (en) | 2020-07-24 |
Family
ID=71632324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922245710.1U Active CN211088525U (en) | 2019-12-16 | 2019-12-16 | Shrinkage joint for insulating tube bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211088525U (en) |
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2019
- 2019-12-16 CN CN201922245710.1U patent/CN211088525U/en active Active
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