Epoxy winding insulation tube for high-voltage switch for high-voltage electrical power transmission and distribution

Abstract

The invention belongs to the technical field of insulating tubes, and particularly relates to an epoxy winding insulating tube for a high-voltage electrical power transmission and distribution high-voltage switch, which comprises a plurality of alkali-free glass fiber layers arranged in sequence from inside to outside, and an aramid fiber layer is arranged between every two adjacent alkali-free glass fiber layers. The alkali-free glass fiber layer is formed by spirally winding an alkali-free glass fiber cloth tape outside the mold core or the aramid fiber layer, the aramid fiber layer is formed by spirally winding a square nylon fiber cloth tape outside the alkali-free glass fiber layer, and the alkali-free glass fiber layer and the aramid fiber layer are cured into an integrated structure; the insulating tube is high in mechanical shock strength and large in breakdown voltage margin, and is more beneficial to long-term stable work of the high-voltage power transmission and distribution switch.

Description

Technical Field

[0001] The invention belongs to the technical field of insulating tubes, and in particular relates to an epoxy wound insulating tube for a high-voltage switch for high-voltage electrical transmission and distribution. Background Art

[0002] The application of wires and cables is mainly divided into three categories: power systems, information transmission systems and mechanical equipment and instrumentation systems. Wire and cable products are mainly divided into five categories: bare wires and bare conductor products, power cables, wires and cables for electrical equipment, communication cables, optical fibers and electromagnetic wires. Among them, the main feature of power cables is the extrusion (winding) of an insulating layer outside the conductor, such as overhead insulated cables, or several cores twisted (corresponding to the phase line, neutral line and ground line of the power system), such as overhead insulated cables with more than two cores, or an additional sheath layer, such as plastic / rubber sheathed wires and cables. The existing insulating tubes used for high-voltage switches for high-voltage electrical transmission and distribution are generally produced by winding and molding alkali-free glass fiber yarn or alkali-free glass fiber cloth tape mixed with insulating adhesive, which has defects such as low mechanical impact strength and small breakdown voltage margin. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide an epoxy-wound insulating tube for a high-voltage electrical transmission and distribution high-voltage switch. The insulating tube has high mechanical impact strength and a large breakdown voltage margin, which is more conducive to the long-term stable operation of the high-voltage transmission and distribution switch.

[0004] The object of the present invention is achieved as follows: an epoxy wound insulating tube for a high-voltage electrical transmission and distribution high-voltage switch, comprising a plurality of alkali-free glass fiber layers arranged in sequence from the inside to the outside, an aramid fiber layer is arranged between adjacent alkali-free glass fiber layers, the alkali-free glass fiber layer is formed by spirally winding an alkali-free glass fiber cloth tape on the outside of a mold core or an aramid fiber layer, the aramid fiber layer is formed by spirally winding an aramid fiber cloth tape on the outside of the alkali-free glass fiber layer, and the alkali-free glass fiber layer and the aramid fiber layer are cured into an integrated structure.

[0005] Furthermore, the aramid fiber layer includes 1 to 3 layers of aramid fiber cloth tapes wound outside the alkali-free glass fiber layer.

[0006] Furthermore, the thickness of the innermost alkali-free glass fiber layer is equal to the sum of the thickness of any other alkali-free glass fiber layer and the inner aramid fiber layer thereof.

[0007] Furthermore, the insulating tube comprises 2-9 layers of alkali-free glass fiber layers, and the aramid fiber layer has one layer less than the alkali-free glass fiber layer.

[0008] Furthermore, the insulating tube comprises three layers of alkali-free glass fiber layers and two layers of aramid fiber layers.

[0009] Furthermore, the spiral angles of the windings of the alkali-free glass fiber tapes are the same, and the winding directions of two adjacent layers of the alkali-free glass fiber tapes are opposite.

[0010] Furthermore, the aramid fiber cloth tape is impregnated with heat-resistant epoxy resin solvent-free insulating glue.

[0011] 8. A method for preparing an epoxy-wound insulating tube for a high-voltage switch for high-voltage electrical transmission and distribution, comprising the following steps: S1: Wrapping an alkali-free glass fiber tape on a mold core in a spiral winding manner through a tensioning device to form a first alkali-free glass fiber layer, wherein the thickness of the first alkali-free glass fiber layer is 1 / 3 of the predetermined thickness of the insulating tube, and the alkali-free glass fiber tape is impregnated with a heat-resistant epoxy resin solvent-free insulating adhesive; S2: Winding 1 to 3 layers of aramid fiber tape on the outer surface of the first alkali-free glass fiber layer to form a first aramid fiber layer, wherein the aramid fiber tape is impregnated with heat-resistant epoxy resin solvent-free insulating glue; S3: Wrapping the alkali-free glass fiber tape around the outside of the first aramid fiber layer in a spiral winding manner through a tensioning device to form a second alkali-free glass fiber layer, wherein the sum of the thickness of the second alkali-free glass fiber layer and the first aramid fiber layer is 1 / 3 of the predetermined thickness of the insulating tube, and the alkali-free glass fiber tape is impregnated with heat-resistant epoxy resin solvent-free insulating glue; S4: Winding 1 to 3 layers of aramid fiber tape on the outer surface of the second alkali-free glass fiber layer to form a second aramid fiber layer, wherein the aramid fiber tape is impregnated with heat-resistant epoxy resin solvent-free insulating glue; S5: Wrapping the alkali-free glass fiber tape on the outside of the second aramid fiber layer in a spiral winding manner through a tensioning device to form a third alkali-free glass fiber layer, the sum of the thickness of the third alkali-free glass fiber layer and the second aramid fiber layer being 1 / 3 of the predetermined thickness of the insulating tube, and the alkali-free glass fiber tape being impregnated with heat-resistant epoxy resin solvent-free insulating glue; S6: placing the alkali-free glass fiber layer and the aramid fiber layer sequentially wound on the mold core into a drying device, heating them and keeping them warm for a period of time to remove moisture therein; S7: Take out the alkali-free glass fiber and nylon fiber cloth tapes that have been dried by the drying equipment, and immerse them in molten resin, and then lift them up; S8: putting the alkali-free glass fiber and nylon fiber cloth tape soaked with molten resin into a drying device for heating and keeping the temperature for a period of time to solidify the resin; S9: The mold core wound with the alkali-free glass fiber and the nylon fiber cloth tape is taken out from the drying device, and after cooling, the cured alkali-free glass fiber and the nylon fiber cloth tape are removed from the mold core to form an insulating tube.

[0012] Furthermore, the type of the aramid cloth is aramid 1414 type or aramid шA type. Compared with the prior art, the beneficial effects of the present invention are: the high-voltage electrical wound insulation tube produced by the new process has high mechanical impact strength and large breakdown voltage margin, which is more conducive to the long-term stable operation of high-voltage transmission and distribution switches. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 The present invention is a schematic diagram of the cross-sectional structure of an epoxy-wound insulating tube for a high-voltage switch for high-voltage electrical transmission and distribution.

[0015] Description of reference numerals: 1. First alkali-free glass fiber layer; 2. First aramid fiber layer; 3. Second alkali-free glass fiber layer; 4. Second aramid fiber layer; 5. Third alkali-free glass fiber layer. DETAILED DESCRIPTION

[0016] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0017] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] In one embodiment of the present invention, Figure 1 As shown, an epoxy wound insulating tube for a high-voltage electrical transmission and distribution high-voltage switch comprises a plurality of alkali-free glass fiber layers arranged in sequence from the inside to the outside, an aramid fiber layer is arranged between adjacent alkali-free glass fiber layers, the alkali-free glass fiber layer is formed by spirally winding an alkali-free glass fiber cloth tape on a mold core or the outside of the aramid fiber layer, the aramid fiber layer is formed by spirally winding an aramid fiber cloth tape on the outside of the alkali-free glass fiber layer, and the alkali-free glass fiber layer and the aramid fiber layer are cured into an integrated structure.

[0022] In one embodiment of the present invention, the aramid fiber layer includes 1-3 layers of aramid fiber tapes wound around the outside of the alkali-free glass fiber layer.

[0023] In one embodiment of the present invention, the thickness of the innermost alkali-free glass fiber layer is equal to the sum of the thickness of any other alkali-free glass fiber layer and the inner aramid fiber layer thereof.

[0024] In one embodiment of the present invention, the insulating tube comprises 2-9 layers of alkali-free glass fiber layers, and the aramid fiber layer has one layer less than the alkali-free glass fiber layer.

[0025] In one embodiment of the present invention, the insulating tube comprises three layers of alkali-free glass fiber layers and two layers of aramid fiber layers.

[0026] In one embodiment of the present invention, the spiral angles of the windings of the alkali-free glass fiber tapes are the same, and the winding directions of two adjacent layers of the alkali-free glass fiber tapes are opposite.

[0027] In one embodiment of the present invention, the aramid fiber tape is impregnated with heat-resistant epoxy resin solvent-free insulating glue.

[0028] A method for preparing an epoxy wound insulating tube for a high-voltage switch for high-voltage electrical transmission and distribution comprises the following steps: S1: Wrapping an alkali-free glass fiber tape on a mold core in a spiral winding manner through a tensioning device to form a first alkali-free glass fiber layer 1, wherein the thickness of the first alkali-free glass fiber layer 1 is 1 / 3 of the predetermined thickness of the insulating tube, and the alkali-free glass fiber tape is impregnated with heat-resistant epoxy resin solvent-free insulating glue; S2: Winding 1 to 3 layers of aramid fiber tape on the outer surface of the first alkali-free glass fiber layer 1 to form a first aramid fiber layer 2, wherein the aramid fiber tape is impregnated with heat-resistant epoxy resin solvent-free insulating glue; S3: Wrapping the alkali-free glass fiber tape on the outside of the first aramid fiber layer 2 in a spiral winding manner through a tensioning device to form a second alkali-free glass fiber layer 3, the sum of the thickness of the second alkali-free glass fiber layer 3 and the first aramid fiber layer 2 is 1 / 3 of the predetermined thickness of the insulating tube, and the alkali-free glass fiber tape is impregnated with heat-resistant epoxy resin solvent-free insulating glue; S4: Winding 1 to 3 layers of aramid fiber tape on the outer surface of the second alkali-free glass fiber layer 3 to form a second aramid fiber layer 4, wherein the aramid fiber tape is impregnated with heat-resistant epoxy resin solvent-free insulating glue; S5: Wrapping the alkali-free glass fiber tape on the outside of the second aramid fiber layer 4 in a spiral winding manner through a tensioning device to form a third alkali-free glass fiber layer 5, wherein the sum of the thickness of the third alkali-free glass fiber layer 5 and the second aramid fiber layer 4 is 1 / 3 of the predetermined thickness of the insulating tube, and the alkali-free glass fiber tape is impregnated with heat-resistant epoxy resin solvent-free insulating glue; S6: placing the alkali-free glass fiber layer and the aramid fiber layer sequentially wound on the mold core into a drying device, heating them and keeping them warm for a period of time to remove moisture therein; S7: Take out the alkali-free glass fiber and nylon fiber cloth tapes that have been dried by the drying equipment, and immerse them in molten resin, and then lift them up; S8: putting the alkali-free glass fiber and nylon fiber cloth tape soaked with molten resin into a drying device for heating and keeping the temperature for a period of time to solidify the resin; S9: The mold core wound with the alkali-free glass fiber and the nylon fiber cloth tape is taken out from the drying device, and after cooling, the cured alkali-free glass fiber and the nylon fiber cloth tape are removed from the mold core to form an insulating tube.

[0029] In one embodiment of the present invention, the type of the aramid cloth is aramid 1414 type or aramid шA type. The high-voltage electrical winding insulating tube produced by the present invention using a new process has high mechanical impact strength and a large breakdown voltage margin, and is more conducive to the long-term stable operation of high-voltage power transmission and distribution switches.

[0030] Compared with the prior art, the beneficial effects of the present invention are: the high-voltage electrical wound insulation tube produced by the new process has high mechanical impact strength and large breakdown voltage margin, which is more conducive to the long-term stable operation of high-voltage transmission and distribution switches.

Claims

1. An epoxy wound insulating tube for high voltage electrical transmission and distribution high voltage switch, characterized in that: It comprises a plurality of alkali-free glass fiber layers arranged in sequence from the inside to the outside, an aramid fiber layer is arranged between adjacent alkali-free glass fiber layers, the alkali-free glass fiber layer is formed by spirally winding an alkali-free glass fiber cloth tape on the outside of a mold core or an aramid fiber layer, the aramid fiber layer is formed by spirally winding an aramid fiber cloth tape on the outside of the alkali-free glass fiber layer, and the alkali-free glass fiber layer and the aramid fiber layer are cured into an integrated structure.

2. The epoxy-wound insulating tube for high-voltage switchgear for high-voltage electrical transmission and distribution as claimed in claim 1, characterized in that: The aramid fiber layer comprises 1 to 3 layers of aramid fiber cloth tapes wound outside the alkali-free glass fiber layer.

3. An epoxy wound insulating tube for a high-voltage switch for high-voltage electrical transmission and distribution as claimed in claim 1 or 2, characterized in that: The thickness of the innermost alkali-free glass fiber layer is equal to the sum of the thickness of any other alkali-free glass fiber layer and the inner aramid fiber layer thereof.

4. The epoxy wound insulating tube for high-voltage switchgear for high-voltage electrical transmission and distribution as claimed in claim 1, characterized in that: The insulating tube comprises 2-9 layers of alkali-free glass fiber layers, and the aramid fiber layer has one layer less than the alkali-free glass fiber layer.

5. The epoxy-wound insulating tube for high-voltage switchgear for high-voltage electrical transmission and distribution as claimed in claim 4, characterized in that: The insulating tube comprises three layers of alkali-free glass fiber layers and two layers of aramid fiber layers.

6. An epoxy wound insulating tube for a high voltage switch for high voltage electrical transmission and distribution as claimed in claim 1 or 5, characterized in that: The spiral angles of the winding of the alkali-free glass fiber cloth tapes are the same, and the winding directions of two adjacent layers of the alkali-free glass fiber cloth tapes are opposite.

7. The epoxy wound insulating tube for high-voltage switchgear for high-voltage electrical transmission and distribution as claimed in claim 1, characterized in that: The aramid fiber cloth tape is impregnated with heat-resistant epoxy resin solvent-free insulating glue.

8. A method for preparing an epoxy wound insulating tube for a high-voltage switch for high-voltage electrical transmission and distribution, characterized in that: The following steps are involved: S1: wrapping an alkali-free glass fiber cloth tape on a mold core in a spiral winding manner through a tensioning device to form a first alkali-free glass fiber layer (1), wherein the thickness of the first alkali-free glass fiber layer (1) is 1 / 3 of the predetermined thickness of the insulating tube, and the alkali-free glass fiber cloth tape is impregnated with heat-resistant epoxy resin solvent-free insulating glue; S2: Winding 1 to 3 layers of aramid fiber tape on the outer surface of the first alkali-free glass fiber layer (1) to form a first aramid fiber layer (2), wherein the aramid fiber tape is impregnated with heat-resistant epoxy resin solvent-free insulating glue; S3: Wrapping an alkali-free glass fiber tape around the outside of the first aramid fiber layer (2) in a spiral winding manner through a tensioning device to form a second alkali-free glass fiber layer (3), wherein the sum of the thickness of the second alkali-free glass fiber layer (3) and the first aramid fiber layer (2) is 1 / 3 of the predetermined thickness of the insulating tube, and the alkali-free glass fiber tape is impregnated with heat-resistant epoxy resin solvent-free insulating glue; S4: Winding 1 to 3 layers of aramid fiber cloth tape on the outer surface of the second alkali-free glass fiber layer (3) to form a second aramid fiber layer (4), wherein the aramid fiber cloth tape is impregnated with heat-resistant epoxy resin solvent-free insulating glue; S5: Wrapping the alkali-free glass fiber tape on the outside of the second aramid fiber layer (4) in a spiral winding manner through a tensioning device to form a third alkali-free glass fiber layer (5), the sum of the thickness of the third alkali-free glass fiber layer (5) and the second aramid fiber layer (4) being 1 / 3 of the predetermined thickness of the insulating tube, the alkali-free glass fiber tape being impregnated with heat-resistant epoxy resin solvent-free insulating glue; S6: placing the alkali-free glass fiber layer and the aramid fiber layer sequentially wound on the mold core into a drying device, heating them and keeping them warm for a period of time to remove moisture therein; S7: Take out the alkali-free glass fiber and nylon fiber cloth tapes that have been dried by the drying equipment, and immerse them in molten resin, and then lift them up; S8: putting the alkali-free glass fiber and nylon fiber cloth tape soaked with molten resin into a drying device for heating and keeping the temperature for a period of time to solidify the resin; S9: The mold core wound with the alkali-free glass fiber and the nylon fiber cloth tape is taken out from the drying device, and after cooling, the cured alkali-free glass fiber and the nylon fiber cloth tape are removed from the mold core to form an insulating tube.

9. The method for preparing an epoxy wound insulating tube for a high-voltage switch for high-voltage electrical transmission and distribution as claimed in claim 8, characterized in that: The model of aramid cloth is aramid 1414 type or aramid шA type.

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