Impregnated fiber sleeve

Abstract

The utility model relates to an impregnated fiber sleeve. The impregnated fiber sleeve comprises an end part voltage-sharing body, a capacitive core body and a flange, one end of the capacitive core body is fixedly connected with the end part voltage-sharing body, the other end of the capacitive core body is fixedly connected with the flange, the capacitive core body comprises a conducting rod, a main insulating layer and a capacitive screen, the conducting rod is wound with the main insulating layer, and the capacitive screen is wound on the outer side of the main insulating layer; the main insulating layer comprises a plurality of layers of wound first insulating solid materials, the capacitive screen comprises a plurality of capacitive screen layers, and each capacitive screen layer is composed of second insulating solid materials and carbon-containing conductive materials which are alternately arranged. According to the impregnation fiber sleeve, the capacitive screen is made of the carbon fibers, the carbon fibers are wound while the glass fibers are wound, so that the glass fibers and the carbon fibers are located in the same layer, the layering phenomenon is prevented, electric field distribution is more uniform, distortion is not prone to occurring, and therefore the discharge breakdown phenomenon is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of glue-impregnated fiber sleeves, in particular to a glue-impregnated fiber sleeve using carbon fiber as a capacitor screen. Background Art

[0002] Glue-impregnated fiber casing, also known as glue-impregnated glass fiber casing, is a casing made of glass fiber reinforced braiding, suitable for continuous high-temperature operation. The synthesis of special high-temperature resistant materials determines that the glue-impregnated fiber casing has many characteristics that are difficult to replace by other similar materials: high temperature resistance, thermal insulation, flame retardancy, electrical insulation, chemical stability, weather aging resistance, cold resistance, etc. With the continuous development of glue-impregnated casing technology, the scope of use of glue-impregnated fiber casing is expanding, and the voltage level is constantly improving.

[0003] Traditionally, the rubber-impregnated fiber casing uses semiconductor paper as the capacitor screen. The semiconductor paper acts as a capacitor plate during operation, ensuring that the field strength at each location does not exceed the limit of the insulating material. However, due to the limited ability of the semiconductor paper to conduct charge under impulse voltage, it is easy to cause local electric field distortion, so discharge breakdown often occurs. If the rubber-impregnated fiber casing uses aluminum foil as the capacitor screen, it is rarely used because aluminum foil has poor compatibility with resin and is prone to delamination. Utility Model Content

[0004] The embodiment of the utility model provides a glue-impregnated fiber sleeve to at least solve the problem in the prior art that a capacitor screen made of semiconductor paper is prone to discharge breakdown, and a capacitor screen made of aluminum foil and resin are prone to delamination.

[0005] According to one aspect of an embodiment of the utility model, a rubber-impregnated fiber sleeve is provided, comprising an end voltage equalizing body, a capacitor core and a flange, wherein one end of the capacitor core is fixedly connected to the end voltage equalizing body, and the other end of the capacitor core is fixedly connected to the flange, and the capacitor core comprises a conductive rod, a main insulating layer and a capacitor screen, the main insulating layer is wound on the conductive rod, and the capacitor screen is wound on the outside of the main insulating layer, wherein the main insulating layer comprises a first insulating solid material wound in multiple layers, and the capacitor screen comprises a plurality of capacitor screen layers, each of which is composed of a second insulating solid material and a carbon-containing conductive material arranged alternately.

[0006] In this way, the glue-impregnated fiber sleeve of the embodiment of the utility model is wound with the carbon-containing conductive material while winding the second insulating solid material, so that the second insulating solid material and the carbon-containing conductive material are located in the same layer, thereby preventing stratification and making the electric field distribution more uniform and less prone to distortion, thereby preventing discharge breakdown.

[0007] According to an exemplary embodiment of the present invention, the carbon-containing conductive material includes carbon fibers.

[0008] In this way, in the glue-impregnated fiber sleeve of the embodiment of the utility model, carbon fiber is used as the capacitor screen to solve the heating problem of the capacitor screen and improve the insulation life.

[0009] According to an exemplary embodiment of the present invention, the first insulating solid material and the second insulating solid material include glass fibers.

[0010] In this way, in the glue-impregnated fiber sleeve of the embodiment of the utility model, glass fiber is used to wind the main insulation layer to provide insulation capacity. In addition, the glass fiber is wound while the carbon fiber is wound, so that the glass fiber and the carbon fiber are located in the same layer to form a capacitive screen. Since the glass fiber has good hydrophobicity, is not as dense as the semiconductor paper, and some of the glass fiber fibers are warped, the capacitive screen is easier to be impregnated with glue and there will be some fiber cross-coupling between the two adjacent capacitive screen layers wound together, and the interlayer bonding will be more firm after the impregnation is cured.

[0011] According to an exemplary embodiment of the present invention, the second insulating solid material and the carbonaceous conductive material are wound on the main insulating layer at uniform intervals.

[0012] In this way, in the glue-impregnated fiber sleeve of the embodiment of the utility model, the second insulating solid material and the carbon-containing conductive material are evenly wound on the main insulating layer, so that the second insulating solid material and the carbon-containing conductive material are located in the same layer, stratification is not likely to occur, and a uniform electric field is provided.

[0013] According to an exemplary embodiment of the present utility model, the capacitive screen includes an end screen, and the end screen is grounded.

[0014] In this way, in the glue-impregnated fiber sleeve of the embodiment of the utility model, each capacitor screen layer is regarded as a capacitor, so that the capacitor core is a voltage-equalizing circuit composed of multiple capacitors connected in series, and the end screen is grounded so that the capacitor screen is grounded, thereby forming a complete loop for the glue-impregnated fiber sleeve.

[0015] According to an exemplary embodiment of the present invention, the end screen is made of a carbon-containing conductive material.

[0016] In this way, in the glue-impregnated fiber sleeve of the embodiment of the utility model, a carbon-containing conductive material is used as the end screen of the capacitor screen to solve the heating problem of the capacitor screen and improve the insulation life.

[0017] According to an exemplary embodiment of the present utility model, the capacitor core is formed by vacuum drying, vacuum impregnation with resin and high temperature curing after winding.

[0018] In this way, in the resin-impregnated fiber sleeve of the embodiment of the utility model, the capacitor core semi-finished product is vacuum dried, vacuum impregnated with resin, and then high-temperature cured and formed after winding to form the capacitor core.

[0019] In an embodiment of the utility model, a glue-impregnated fiber sleeve is provided, which uses carbon fiber as a capacitor screen. A technical solution is provided in which carbon fiber is wound while glass fiber is wound so that the glass fiber and the carbon fiber are located in the same layer, so as to at least solve the technical problems that capacitor screens made of semiconductor paper are prone to discharge breakdown, and capacitor screens made of aluminum foil materials and resins are prone to stratification. The stratification phenomenon is prevented, and the electric field distribution is made more uniform and less prone to distortion, thereby preventing the discharge breakdown phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0021] Figure 1 It is a partial longitudinal cross-sectional schematic diagram showing the structure of the glue-impregnated fiber sleeve of the utility model;

[0022] Figure 2 It is shown Figure 1 an enlarged schematic diagram of the middle portion I; and

[0023] Figure 3 Schematic diagram showing the winding method of glass fiber and carbon fiber.

[0024] List of reference numerals:

[0025] 1: End pressure equalizer;

[0026] 2: Capacitor core;

[0027] 3: Flange;

[0028] 20: conductive rod;

[0029] 22: Main insulation layer;

[0030] 222: The first insulating solid material

[0031] 24: Capacitive screen;

[0032] 242: second insulating solid material;

[0033] 244: Carbon-containing conductive material. DETAILED DESCRIPTION

[0034] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement embodiments of the present invention. However, the present invention can be implemented in many different forms and should not be construed as being limited to the embodiments described herein. In the accompanying drawings, for the sake of clarity, parts irrelevant to the description of the present invention will be omitted. Similar reference numerals refer to similar elements throughout the description. In addition, when providing a description with reference to the accompanying drawings, although the elements are represented by the same numerals, the reference numerals relating to the elements may be changed, and the reference numerals are described only for the convenience of description, and should not be understood as the concept, feature, function or effect of the element being limited by the reference numeral.

[0035] The traditional glue-impregnated fiber sleeve uses semiconductor paper as the capacitor screen, which often has the problem of discharge breakdown. If the glue-impregnated fiber sleeve uses aluminum foil as the capacitor screen, due to the poor compatibility of aluminum foil with resin, there is a problem of easy stratification.

[0036] In response to the above technical problems, the glue-impregnated fiber sleeve of the utility model uses carbon fiber as the capacitor screen. The carbon fiber is wound while the glass fiber is wound, so that the glass fiber and the carbon fiber are located in the same layer, preventing stratification, and making the electric field distribution more uniform and less prone to distortion, thereby preventing discharge breakdown.

[0037] According to one aspect of an embodiment of the utility model, a rubber-impregnated fiber sleeve is provided, comprising an end voltage equalizing body, a capacitor core and a flange, wherein one end of the capacitor core is fixedly connected to the end voltage equalizing body, and the other end of the capacitor core is fixedly connected to the flange, and the capacitor core comprises a conductive rod, a main insulating layer and a capacitor screen, the main insulating layer is wound on the conductive rod, and the capacitor screen is wound on the outside of the main insulating layer, wherein the main insulating layer comprises a first insulating solid material wound in multiple layers, and the capacitor screen comprises a plurality of capacitor screen layers, each of which is composed of a second insulating solid material and a carbon-containing conductive material arranged alternately.

[0038] Figure 1 It is a partial longitudinal cross-sectional schematic diagram showing the structure of the glue-impregnated fiber sleeve of the utility model, Figure 2 It is shown Figure 1 The enlarged schematic diagram of part I in the middle, and Figure 3 Schematic diagram showing the winding method of glass fiber and carbon fiber.

[0039] like Figure 1 , Figure 2 and Figure 3As shown, the rubber-impregnated fiber sleeve of the utility model comprises: an end voltage equalizing body 1, a capacitor core 2 and a flange 3. One end of the capacitor core 2 is fixedly connected to the end voltage equalizing body 1, and the other end of the capacitor core 2 is fixedly connected to the flange 3. The center of the capacitor core 2 is a conductive rod 20, on which a main insulating layer 22 is wound, and a capacitor screen 24 is wound outside the main insulating layer 22, wherein the main insulating layer 22 comprises a first insulating solid material 222 wound in multiple layers, and the capacitor screen 24 comprises a plurality of capacitor screen layers, each of which is composed of a second insulating solid material 242 and a carbon-containing conductive material 244 arranged alternately.

[0040] In this way, the glue-impregnated fiber sleeve of the embodiment of the utility model is wound with the carbon-containing conductive material 244 while winding the second insulating solid material 242, so that the second insulating solid material 242 and the carbon-containing conductive material 244 are located in the same layer, thereby preventing stratification and making the electric field distribution more uniform and less prone to distortion, thereby preventing discharge breakdown.

[0041] According to an exemplary embodiment of the present invention, the carbon-containing conductive material includes carbon fibers.

[0042] In this way, in the glue-impregnated fiber sleeve of the embodiment of the utility model, carbon fiber is used as the capacitor screen to solve the heating problem of the capacitor screen and improve the insulation life.

[0043] According to an exemplary embodiment of the present invention, the first insulating solid material and the second insulating solid material include glass fibers.

[0044] In this way, in the glue-impregnated fiber sleeve of the embodiment of the utility model, glass fiber is used to wind the main insulating layer 22 to provide insulation capacity, and glass fiber is wound while carbon fiber is wound, so that the glass fiber and carbon fiber are located in the same layer to form the capacitor screen 24. Since the glass fiber has good hydrophobicity, is not as dense as semiconductor paper, and has some fiber curling, the capacitor screen 24 is easier to be impregnated with glue and there will be some fiber cross-coupling between the two adjacent capacitor screen layers wound together. After the impregnation is cured, the interlayer bonding will be stronger.

[0045] According to an exemplary embodiment of the present invention, the second insulating solid material and the carbonaceous conductive material are wound on the main insulating layer at uniform intervals.

[0046] Specifically, Figure 3 As shown, the second insulating solid material 242 and the carbon-containing conductive material 244 are wound on the main insulating layer 22 at uniform intervals. Specifically, the second insulating solid material 242 and the carbon-containing conductive material 244 can be wound on the main insulating layer 22 at uniform intervals in a certain ratio, which can be 1:1, 1:2, 2:1 or any other required ratio, but this example is not limited thereto.

[0047] In one embodiment, the main insulating layer 22 is glass fiber wound on the conductive rod 20. A capacitive screen 24 is arranged outside the glass fiber as the main insulating layer 22. The capacitive screen 24 is specifically a plurality of capacitive screen layers, each of which includes evenly spaced glass fibers and carbon fibers. That is, the glass fibers and carbon fibers are located in the same capacitive screen layer.

[0048] In this way, in the glue-impregnated fiber sleeve of the embodiment of the utility model, the second insulating solid material 242 and the carbon-containing conductive material 244 are evenly wound on the main insulating layer 22, so that the second insulating solid material 242 and the carbon-containing conductive material 244 are located in the same layer, stratification is not likely to occur, and a uniform electric field is provided.

[0049] According to an exemplary embodiment of the present utility model, the capacitive screen includes an end screen, and the end screen is grounded.

[0050] In this way, in the glue-impregnated fiber sleeve of the embodiment of the utility model, each capacitor screen layer is regarded as a capacitor, so that the capacitor core 2 is a voltage-equalizing circuit formed by multiple capacitors connected in series, and the end screen is grounded so that the capacitor screen 24 is grounded, thereby forming a complete loop for the glue-impregnated fiber sleeve.

[0051] According to an exemplary embodiment of the present invention, the end screen is made of a carbon-containing conductive material.

[0052] In this way, in the glue-impregnated fiber sleeve of the embodiment of the utility model, the carbon-containing conductive material 244 is used as the end screen of the capacitor screen 24 to solve the heating problem of the capacitor screen 24 and improve the insulation life.

[0053] According to an exemplary embodiment of the present utility model, the capacitor core 2 is formed by vacuum drying, vacuum impregnation with resin, and high-temperature curing after winding.

[0054] In this way, in the resin-impregnated fiber sleeve of the embodiment of the utility model, the capacitor core semi-finished product is vacuum dried, vacuum impregnated with resin, and then high-temperature cured and formed after winding to form the capacitor core 2.

[0055] Specifically, when manufacturing the capacitor core 2, the utility model first prepares a conductive rod 20. Multiple layers (referred to as m layers) of the first insulating solid material 222 are wound on the conductive rod 20 to reach the required thickness to form the main insulating layer 22, and then the second insulating solid material 242 and the carbon-containing conductive material 244 are alternately wound on the outside of the main insulating layer 22 to form a capacitor screen layer, which is the first layer of capacitor screen. After the first layer of capacitor screen is completed, the second layer of capacitor screen is rolled, and so on, until the last layer of capacitor screen, i.e., the final screen, is formed, thereby manufacturing the capacitor core 2.

[0056] In an embodiment of the utility model, a glue-impregnated fiber sleeve is provided, which uses carbon fiber as a capacitor screen. A technical solution is provided in which carbon fiber is wound while glass fiber is wound so that the glass fiber and the carbon fiber are located in the same layer, so as to at least solve the technical problems that capacitor screens made of semiconductor paper are prone to discharge breakdown, and capacitor screens made of aluminum foil materials and resins are prone to stratification. The stratification phenomenon is prevented, and the electric field distribution is made more uniform and less prone to distortion, thereby preventing the discharge breakdown phenomenon.

[0057] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0058] In the several embodiments provided by the present utility model, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic, for example, the division of the units or modules is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or modules or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0059] In addition, each functional unit or module in each embodiment of the present utility model may be integrated into one processing unit or module, or each unit or module may exist physically separately, or two or more units or modules may be integrated into one unit or module.

[0060] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A rubber-impregnated fiber casing, comprising an end voltage equalizing body (1), a capacitor core (2) and a flange (3), characterized in that: One end of the capacitor core (2) is fixedly connected to the end voltage equalizing body (1), and the other end of the capacitor core (2) is fixedly connected to the flange (3), and the capacitor core (2) comprises a conductive rod (20), a main insulating layer (22) and a capacitor screen (24), the main insulating layer (22) is wound on the conductive rod (20), and the capacitor screen (24) is wound outside the main insulating layer (22), wherein the main insulating layer (22) comprises a first insulating solid material (222) wound in multiple layers, and the capacitor screen (24) comprises a plurality of capacitor screen layers, each of which is composed of a second insulating solid material (242) and a carbon-containing conductive material (244) arranged alternately. The second insulating solid material (242) and the carbon-containing conductive material (244) are wound on the main insulating layer (22) at even intervals. The capacitive screen (24) comprises an end screen, and the end screen is connected to ground. wherein the end screen is made of the carbon-containing conductive material (244), and The capacitor core (2) is formed by vacuum drying, vacuum impregnation with resin and high temperature curing after winding.

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