Ultrahigh-voltage dry-type insulated cable

Abstract

The utility model discloses an ultrahigh-voltage dry-type insulated cable, which is characterized in that the end part of an outer insulating layer is provided with a cable connecting assembly, one side of a connecting male end is welded with a butt joint inner pipe, the other end of the outer insulating layer is fixedly sleeved with a connecting female end, and the middle part of an isolating layer positioned at the connecting male end is welded with a male end copper pipe in a penetrating manner; a female end copper pipe is welded to the middle of the isolating layer located at the connecting female end in a penetrating mode, inner threaded pipes are evenly welded to the outer side of the connecting female end in a penetrating mode, an extrusion screw is connected to the interior of one inner threaded pipe through threads, and a rotating handle is welded to one end of the extrusion screw. The male end copper pipe and the female end copper pipe both deform and extrude the wire, fixing operation of the male end copper pipe, the female end copper pipe and the wire is completed at the same time, the connecting male end and the connecting female end are filled with flame-retardant polyurethane polystyrene foam through the inner threaded pipe, connection is easy and convenient, the number of used tools is small, operation is easy and convenient, and the connecting efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to an ultra-high voltage dry-insulated cable. Background Technology

[0002] A cable is an electrical energy or signal transmission device, usually composed of several or several groups of conductors. There are five common types: low voltage, medium voltage, high voltage, ultra-high voltage, and extra-high voltage. Ultra-high voltage cables usually refer to power cables with a rated voltage of 220kV and above, and they are available in copper core and aluminum core.

[0003] However, when using ultra-high voltage dry-insulated cables on the market, if splicing is required, the large cable diameter makes splicing difficult. There are heat shrinking, cold shrinking, fusion welding and traditional crimping methods, but all of the above connection methods are very laborious and time-consuming, difficult to operate, and have low cable connection efficiency. Utility Model Content

[0004] This utility model provides an ultra-high voltage dry-insulated cable, which can effectively solve the problem mentioned in the background art that when ultra-high voltage dry-insulated cables need to be connected, it is difficult to connect due to the large diameter of the cable. There are heat shrinking method, cold shrinking method, fusion welding method and traditional crimping method, but the above connection methods are all very laborious and time-consuming, difficult to operate, and have low cable connection efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an ultra-high voltage dry-insulated cable, comprising an outer insulation layer, wherein a cable connection assembly is provided at the end of the outer insulation layer, and the cable connection assembly comprises a male connection end, a mating inner tube, a mating groove, a female connection end, an isolation layer, a male copper tube, a female copper tube, an internally threaded tube, a pressing screw, and a rotating handle;

[0006] One end of the outer insulation layer is fixedly sleeved with a male connector. A mating inner tube is welded to one side of the male connector. A mating groove is evenly opened on the outer side of the mating inner tube. The other end of the outer insulation layer is fixedly sleeved with a female connector. An isolation layer is fixedly installed inside the male and female connectors. A male copper tube is welded through the middle of the isolation layer at the male connector, and a female copper tube is welded through the middle of the isolation layer at the female connector.

[0007] The outer side of the connecting female end is uniformly welded with an internally threaded tube, and a pressing screw is threadedly connected inside one of the internally threaded tubes. A rotating handle is welded to one end of the pressing screw.

[0008] According to the above technical solution, the male and female connectors are connected by a transition fit, and the male copper tube and the female copper tube are connected by a transition fit.

[0009] According to the above technical solution, the edge of the docking groove port is rounded, and the outer diameter of the internal threaded pipe is equal to the width of the docking groove.

[0010] According to the above technical solution, the end face of the isolation layer is attached to the outer insulation layer, and the outer edges of the male connection end and the outer edges of the female connection end are aligned.

[0011] According to the above technical solution, a supporting conductive component is provided inside the outer insulation layer. The supporting conductive component includes a wire, a thermally conductive silicone block, a supporting thermally conductive ring, a filling layer, and an aluminum alloy wrapping layer.

[0012] A wire is provided in the center of the outer insulation layer, and thermally conductive silicone blocks are evenly distributed on the outside of the wire. Three thermally conductive silicone blocks located in the same plane are evenly snapped into the inside of the supporting thermally conductive ring. A filler layer is filled between the outer insulation layer and the wire, and an aluminum alloy wrapping layer is wrapped around the outside of the filler layer.

[0013] According to the above technical solution, one end of the thermally conductive silicone block is attached to the inner side of the outer insulation layer, and the other end of the thermally conductive silicone block is attached to the aluminum alloy wrapping layer.

[0014] According to the above technical solution, the conductor passes through the male copper tube, and the conductor and the male copper tube are in a clearance fit.

[0015] Compared with the prior art, the advantages of this utility model are: the structure of this utility model is scientific and reasonable, and it is safe and convenient to use;

[0016] 1. Equipped with cable connection components, when cables need to be connected, pull the male and female connectors close together and align them. Install the compression screws on the internally threaded tube and rotate the handle. Both the male and female copper tubes deform and compress the conductor, simultaneously fixing the male and female copper tubes and the conductor. After installing the compression screws on the four internally threaded tubes, compress the conductor through the internally threaded tube. Fill the male and female connectors with flame-retardant polyurethane foam. After the flame-retardant polyurethane foam dries, wrap the outside of the male and female connectors with insulating tape to complete the connection. The connection is simple and convenient, requires few tools, and improves connection efficiency.

[0017] 2. Equipped with a supporting conductive component, the cable's compressive strength is improved through the support heat-conducting ring and aluminum alloy wrapping layer during use. If the conductor generates heat during operation, the heat will be transferred to the supporting heat-conducting ring through the thermally conductive silicone block, and then to the aluminum alloy wrapping layer and the outer insulation layer. The outer insulation layer cools down by exchanging heat with the outside environment. Compared with ordinary cables, the heat dissipation effect is better, effectively reducing the internal temperature of the cable and extending its service life. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0019] In the attached diagram:

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a structural schematic diagram of the cable connection assembly of this utility model;

[0022] Figure 3 This is a schematic diagram of the installation structure of the internally threaded pipe of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the conductive component supporting this utility model;

[0024] Labels in the diagram: 1. Outer insulation layer;

[0025] 2. Cable connection assembly; 201. Male connector; 202. Inner tube; 203. Connecting groove; 204. Female connector; 205. Insulation layer; 206. Male copper tube; 207. Female copper tube; 208. Internally threaded tube; 209. Extrusion screw; 210. Rotating handle;

[0026] 3. Supporting conductive components; 301. Wire; 302. Thermally conductive silicone block; 303. Supporting thermally conductive ring; 304. Filler layer; 305. Aluminum alloy wrapping layer. Detailed Implementation

[0027] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0028] Example: Figure 1-4 As shown, this utility model provides a technical solution for an ultra-high voltage dry-insulated cable, including an outer insulation layer 1, and a cable connection assembly 2 provided at the end of the outer insulation layer 1. The cable connection assembly 2 includes a male connection end 201, a mating inner tube 202, a mating groove 203, a female connection end 204, an isolation layer 205, a male end copper tube 206, a female end copper tube 207, an internally threaded tube 208, a pressing screw 209, and a rotating handle 210.

[0029] One end of the outer insulation layer 1 is fixedly sleeved with a male connector 201. A mating inner tube 202 is welded to one side of the male connector 201. The outer side of the mating inner tube 202 is evenly provided with mating grooves 203. The other end of the outer insulation layer 1 is fixedly sleeved with a female connector 204. The isolation layer 205 is attached to the end face of the outer insulation layer 1. The outer edges of the male connector 201 and the female connector 204 are aligned to keep the outer side of the mating point flat. The male connector 201 and the female connector 204 are internally fixed. An isolation layer 205 is provided. A male copper tube 206 is welded through the middle of the isolation layer 205 connecting the male end 201. A female copper tube 207 is welded through the middle of the isolation layer 205 connecting the female end 204. The connection between the male end 201 and the female end 204 is a transition fit connection, and the connection between the male copper tube 206 and the female copper tube 207 is a transition fit connection, which facilitates the connection between the male end 201 and the female end 204, as well as the connection between the male copper tube 206 and the female copper tube 207.

[0030] An internally threaded tube 208 is uniformly welded through the outer side of the connecting female end 204. The edge of the docking groove 203 is rounded. The outer diameter of the internally threaded tube 208 is equal to the width of the docking groove 203, so that the docking groove 203 can be snapped onto the outside of the internally threaded tube 208. A pressing screw 209 is connected to the inside of one of the internally threaded tubes 208 by threads. A rotating handle 210 is welded to one end of the pressing screw 209.

[0031] The outer insulation layer 1 is provided with a supporting conductive component 3, which includes a wire 301, a thermally conductive silicone block 302, a supporting thermally conductive ring 303, a filling layer 304, and an aluminum alloy wrapping layer 305.

[0032] A wire 301 is provided in the middle of the inner part of the outer insulation layer 1. The wire 301 passes through the male copper tube 206. The wire 301 and the male copper tube 206 are in a clearance fit to facilitate the wire 301 passing through the male copper tube 206 for docking. Thermally conductive silicone blocks 302 are evenly distributed on the outer side of the wire 301. Three thermally conductive silicone blocks 302 located in the same plane are evenly snapped into the interior of the supporting thermally conductive ring 303. A filler layer 304 is filled between the outer insulation layer 1 and the wire 301. An aluminum alloy wrapping layer 305 is wrapped around the outside of the filler layer 304. One end of the thermally conductive silicone block 302 is attached to the inner side of the outer insulation layer 1, and the other end of the thermally conductive silicone block 302 is attached to the aluminum alloy wrapping layer 305 to improve the thermal conductivity.

[0033] The working principle and usage process of this utility model are as follows: When it is necessary to connect cables, first remove the outer insulation layer 1 and the filling layer 304 of the cable at the end position to expose the conductor 301. Then, connect the male end 201 and the female end 204 to the opposite ends of the cable respectively. Fill the gap between the male end 201 and the female end 204 and the outer insulation layer 1 with glue to fix them. The opposite conductors 301 pass through the male end copper tube 206 and the female end copper tube 207 respectively.

[0034] Next, pull the male end 201 and the female end 204 closer together and align them. During this alignment, the mating groove 203 engages with the outside of the internally threaded tube 208, guiding the engagement until the male end 201 and the female end 204 are fully aligned. Subsequently, install the extrusion screw 209 on the internally threaded tube 208 and rotate the handle 210. The extrusion screw 209 rotates along the internally threaded tube 208 and extrudes the overlapping male end copper tube 206 and female end copper tube 207, continuing to extrude until both the male end copper tube 206 and the female end copper tube 207 are deformed and extruded. The wire 301 is crimped, simultaneously fixing the male copper tube 206, female copper tube 207, and wire 301. Four crimping screws 209 are installed on the internal threaded tube 208 and then crimped. The crimping screws 209 are then removed for easy connection in the next operation. Flame-retardant polyurethane foam is filled into the male and female ends 204 through the internal threaded tube 208. After the flame-retardant polyurethane foam dries, insulating tape is wrapped around the outside of the male and female ends 204 to complete the connection. The connection is simple and convenient, requires fewer tools, and improves connection efficiency.

[0035] During cable use, the support heat-conducting ring 303 and aluminum alloy wrapping layer 305 enhance its compressive strength. If the conductor 301 generates heat during operation, the heat will be transferred to the support heat-conducting ring 303 through the thermally conductive silicone block 302, and then to the aluminum alloy wrapping layer 305 and the outer insulation layer 1. The outer insulation layer 1 cools down by exchanging heat with the outside environment. Compared with ordinary cables, the heat dissipation effect is better, effectively reducing the internal temperature of the cable and extending its service life.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An ultra-high voltage dry-insulated cable, comprising an outer insulation layer (1), characterized in that: The outer insulation layer (1) is provided with a cable connection assembly (2) at its end. The cable connection assembly (2) includes a male connection end (201), a mating inner tube (202), a mating groove (203), a female connection end (204), an isolation layer (205), a male copper tube (206), a female copper tube (207), an internal threaded tube (208), a pressing screw (209), and a rotating handle (210). One end of the outer insulation layer (1) is fixedly sleeved with a male connector (201), and a mating inner tube (202) is welded to one side of the male connector (201). A mating groove (203) is evenly opened on the outside of the mating inner tube (202). The other end of the outer insulation layer (1) is fixedly sleeved with a female connector (204). An isolation layer (205) is fixedly installed inside the male connector (201) and the female connector (204). A male copper tube (206) is welded through the middle of the isolation layer (205) of the male connector (201), and a female copper tube (207) is welded through the middle of the isolation layer (205) of the female connector (204). The outer side of the connecting female end (204) is uniformly welded with an internally threaded tube (208), and a pressing screw (209) is connected inside the internally threaded tube (208) by a thread. A rotating handle (210) is welded to one end of the pressing screw (209).

2. The ultra-high voltage dry-type insulated cable according to claim 1, characterized in that, The male connector (201) and the female connector (204) are connected by a transition fit, and the male copper tube (206) and the female copper tube (207) are connected by a transition fit.

3. An ultra-high voltage dry-type insulated cable according to claim 1, characterized in that, The port edge of the docking groove (203) is rounded, and the outer diameter of the internally threaded tube (208) is equal to the width of the docking groove (203).

4. The ultra-high voltage dry-type insulated cable according to claim 1, characterized in that, The isolation layer (205) is attached to the end face of the outer insulation layer (1), and the outer edge of the male connection end (201) is aligned with the outer edge of the female connection end (204).

5. The ultra-high voltage dry-type insulated cable according to claim 1, characterized in that, The outer insulation layer (1) is provided with a supporting conductive component (3), which includes a wire (301), a thermally conductive silicone block (302), a supporting thermally conductive ring (303), a filling layer (304), and an aluminum alloy wrapping layer (305). A wire (301) is provided in the middle of the inner part of the outer insulation layer (1). Thermally conductive silicone blocks (302) are evenly distributed on the outer side of the wire (301). Three thermally conductive silicone blocks (302) located in the same plane are evenly snapped into the interior of the supporting thermally conductive ring (303). A filling layer (304) is filled between the outer insulation layer (1) and the wire (301). An aluminum alloy wrapping layer (305) is wrapped around the outside of the filling layer (304).

6. An ultra-high voltage dry-type insulated cable according to claim 5, characterized in that, One end of the thermally conductive silicone block (302) is attached to the inner side of the outer insulating layer (1), and the other end of the thermally conductive silicone block (302) is attached to the aluminum alloy wrapping layer (305).

7. The ultra-high voltage dry-type insulated cable according to claim 5, characterized in that, The conductor (301) passes through the male copper tube (206), and the conductor (301) and the male copper tube (206) are in a clearance fit.

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