CN215933286U

CN215933286U - Combined type electric stress control area

Info

Publication number: CN215933286U
Application number: CN202121925576.0U
Authority: CN
Inventors: 王海波; 杜娜; 李明宇; 徐志华
Original assignee: Changchun Zhongke Yinghua Special Materials Co ltd
Current assignee: Changchun Zhongke Yinghua Special Materials Co ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2022-03-01
Anticipated expiration: 2031-08-17

Abstract

The utility model relates to a composite electric stress control belt, and belongs to the technical field of electric stress control belts. The technical problems that glue overflow is easy to occur in an electric stress control belt and fixing is inconvenient in the prior art are solved. The composite electric stress control belt comprises a control belt, a nylon hook belt and a nylon velvet belt; the control band comprises an electric stress control layer, a bonding layer and an isolating layer which are arranged in sequence from outside to inside; two sides of the bonding layer are provided with non-adhesive sections; one end of the nylon hook belt and one end of the nylon velvet belt are fixed at the same end of the control belt. The adhesive layer of the composite electric stress control tape is provided with the adhesive-free section, when the electric stress control tape winds the cable, even if certain tensile force and pressure are applied to the electric stress control tape, adhesive overflow does not occur on the adhesive layer, the cost is saved, and the operation is convenient; the nylon hook area and the nylon fine hair area are fixed to the one end in control area, and after the control area was convoluteed, it was fixed through nylon hook area and nylon fine hair area, accomodate the convenience.

Description

Combined type electric stress control area

Technical Field

The utility model belongs to the technical field of electric stress control belts, and particularly relates to a composite electric stress control belt.

Background

The field strength is concentrated at the cut-off of the cable, and thus a breakdown phenomenon is likely to occur there during operation. Whether the electric stress concentration of the cable section can be effectively controlled is the key for ensuring the safety of a power grid.

The electric stress layer control method is characterized by that a composite dielectric layer (electric stress layer) with high dielectric constant is introduced into the cable fracture, and the electric parameter of the medium of said composite dielectric layer is regulated to regulate and control the electric potential distribution of the fracture, and can improve electric field distribution, and can make the electric field distribution and field strength of cable joint portion be in the most reasonable state so as to reduce the probability of local breakdown, and can raise the reliability of operation of cable accessories and prolong their service life. The most commonly used product in the electrical stress layer control method is an electrical stress control band, and the principle of the electrical stress control band is that materials with proper electrical parameters are adopted and compounded on the outer surface of a cable insulating layer at the cut part of a cable so as to change the electric field distribution of the insulating surface and achieve the purpose of improving the electric field.

In the prior art, the electrical stress control tape is a multilayer structure, as shown in fig. 1, the electrical stress control tape sequentially includes an electrical stress control layer 1, an adhesive layer 2, and an isolation layer 3 from outside to inside, and outer edges of the three layers are aligned. When the cable is used, the isolating layer 3 is torn off and wound around the cable fracture in a semi-overlapping mode, the electric stress control layer 1 is arranged on the outer side, and the bonding layer 2 is bonded with the cable. The electric stress control tape with the structure is firmly adhered, but certain tensile force and pressure can be applied to the electric stress control tape in order to fit the shape of the cable and increase the compactness when the electric stress control tape is wound on the cable, so that the adhesive overflow condition of the adhesive layer can be caused, and waste and inconvenient operation are caused. In addition, the finished product of the electric stress control belt in the prior art is that one end is wound, another adhesive tape is taken out for fixing after the other end, when the electric stress control belt is used, the adhesive tape needs to be disassembled, and when the electric stress control belt is used and then fixed, the adhesive tape needs to be taken out again for fixing, namely, the electric stress control belt is inconvenient to fix.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a composite electrical stress control tape to solve the technical problems in the prior art that the electrical stress control tape is easy to overflow glue and is inconvenient to fix.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows.

The composite electric stress control belt comprises a control belt, a nylon hook belt and a nylon velvet belt;

the control band comprises an electrical stress control layer, a bonding layer and an isolation layer which are arranged in sequence from outside to inside; the widths of the electric stress control layer and the isolation layer are equal, the outer edges of the electric stress control layer and the isolation layer are aligned, the width of the bonding layer is smaller than that of the electric stress control layer, and the distance from the left edge of the bonding layer to the left edge of the electric stress control layer is equal to the distance from the right edge of the bonding layer to the right edge of the electric stress control layer;

the nylon hook belt is a double-sided nylon hook belt, the nylon velvet belt is a double-sided nylon velvet belt, and one end of the nylon hook belt and one end of the nylon velvet belt are fixed at the same end of the control belt.

Further, the distance between the left edge of the bonding layer and the left edge of the electric stress control layer is 8-15% of the width of the electric stress control layer.

Furthermore, the cross-sectional shape of the bonding layer is an arc protruding from the electrical stress control layer to the isolation layer.

Further, the radian of the circular arc is 5-25 degrees.

Furthermore, the nylon hook belt and the nylon velvet belt are fixed by sewing.

Compared with the prior art, the utility model has the beneficial effects that:

the adhesive layer of the composite electric stress control tape is provided with the adhesive-free section, so that when the electric stress control tape is wound on a cable, even if certain tensile force and pressure are applied to the electric stress control tape, adhesive overflow does not occur on the adhesive layer, the cost is saved, and the operation is convenient. The double-sided nylon hook belt and the nylon velvet belt are fixed at one end of the control belt, and after the adhesive tape is wound, the double-sided nylon hook belt and the nylon velvet belt can be fixed, so that the storage is convenient.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the detailed description will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a schematic diagram of a prior art electrical stress control strap;

FIG. 2 is a schematic view of the construction of the control band of the present invention;

FIG. 3 is a schematic view of the construction of the control band of the present invention;

FIG. 4 is a schematic structural diagram of a composite electrical stress control tape of the present invention;

FIG. 5 is a schematic structural view of a composite electrical stress control tape of the present invention;

FIG. 6 is a schematic diagram of a wound composite electrical stress control tape according to the present invention;

in the figure, 1, an electric stress control layer, 2, a bonding layer, 3, an isolation layer, 4, a nylon hook tape, 5 and a nylon velvet tape.

Detailed Description

For a further understanding of the utility model, preferred embodiments of the utility model are described below in conjunction with the detailed description, but it is to be understood that the description is intended to further illustrate the features and advantages of the utility model and not to limit the claims to the utility model.

As shown in fig. 2-6, the composite electrical stress control tape of the present invention comprises a control tape, a nylon hook tape 4 and a nylon loop tape 5.

The control band comprises an electric stress control layer 1, an adhesive layer 2 and an isolation layer 3 which are arranged in sequence from outside to inside. The adhesive layer 2 is provided with an adhesive-free section. That is, the widths of the electrical stress control layer 1 and the isolation layer 3 are equal and the outer edges are aligned, the width of the bonding layer 2 is smaller than that of the electrical stress control layer 1, the distance from the left edge of the bonding layer 3 to the left edge of the electrical stress control layer 1 is equal to that from the right edge of the bonding layer 3 to the right edge of the electrical stress control layer 1, and the distance from the left edge of the bonding layer 3 to the left edge of the electrical stress control layer 1 is preferably 8-15% of the width of the electrical stress control layer 1. In order to ensure higher plasticity of the adhesive layer 2 during winding, the cross-sectional shape of the adhesive layer 2 is preferably an arc protruding from the electrical stress control layer 1 to the isolation layer 3, and the radian of the arc is preferably 5 to 25 degrees. When the electrical stress control tape is wound, the separator 3 is adhered to the lower surface of the adhesive layer 2.

Nylon hook belt 4 is two-sided nylon hook belt, and nylon velvet belt 5 is two-sided nylon velvet belt, and the one end of nylon hook belt 4 and the one end of nylon velvet belt 5 are fixed at the same end in control area, and fixed mode is fixed for the suture, and after the sticky tape coiling, can fix through nylon hook belt 4 and nylon velvet belt 5, accomodate the convenience. The length of nylon hook area 4 and nylon fine hair area 5 sets up according to actual need, can twine once fixed, also can twine several rings and fix again, sets up according to actual demand, can fix can.

In this embodiment, the materials of the electrical stress control layer 1, the adhesive layer 2 and the isolation layer 3 are the prior art, and are not the innovation point of the present invention. For example, the electrical stress control layer 1 may be made of the material of the electrical stress control tape of chinese patent 200910067125.5.

Claims

1. The composite electric stress control belt is characterized by comprising a control belt, a nylon hook belt (4) and a nylon velvet belt (5);

the control band comprises an electric stress control layer (1), a bonding layer (2) and an isolation layer (3) which are arranged in sequence from outside to inside; the widths of the electric stress control layer (1) and the isolation layer (3) are equal, the outer edges of the electric stress control layer and the isolation layer are aligned, the width of the bonding layer (2) is smaller than that of the electric stress control layer (1), and the distance from the left edge of the bonding layer (2) to the left edge of the electric stress control layer (1) is equal to the distance from the right edge of the bonding layer (2) to the right edge of the electric stress control layer (1);

the nylon hook belt (4) is a double-sided nylon hook belt, the nylon velvet belt (5) is a double-sided nylon velvet belt, and one end of the nylon hook belt (4) and one end of the nylon velvet belt (5) are fixed at the same end of the control belt.

2. The composite electrical stress control tape according to claim 1, wherein the left edge of the adhesive layer (2) is spaced from the left edge of the electrical stress control layer (1) by a distance of 8-15% of the width of the electrical stress control layer (1).

3. The composite electrical stress control tape according to claim 1, wherein the cross-sectional shape of the adhesive layer (2) is a circular arc protruding from the electrical stress control layer (1) to the isolation layer (3).

4. The composite electrical stress control band of claim 3, wherein the arc of the arc is 5-25 degrees.

5. The composite electrical stress control band of claim 1, wherein the nylon hook tape (4) and nylon loop tape (5) are secured by stitching.