A 35 kV power cable facilitating tapping

Abstract

This utility model discloses a 35kV power cable that is easy to tap. A tapping assembly is provided on the outside of the outer insulation layer. A conductive tube is embedded inside the positioning hole, and a conductive post is slidably installed inside the conductive tube. A storage groove is opened on the inner side of the arc-shaped rod corresponding to the conductive post. An inflatable washer is embedded in the rubber sheath near the storage groove. Positioning screws are installed on the outer side of the rubber sheath corresponding to the arc-shaped rod. In this utility model, the conductor in the storage groove is squeezed and deformed, and fits against the top surface of the conductive ring. The compression washer closes the storage groove. The tapping conductor is located inside the compression washer and is tightly squeezed to the outside of the outer insulation layer due to the deformation of the compression washer. The rubber sheath closes the circular arc-shaped rod again to prevent foreign objects from entering, completing the sealing operation. The operation is simple, the tapping efficiency is high, and there are no restrictions on the specifications of the cable to be tapped. It is suitable for tapping cables of various specifications and has a wider range of applications.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a 35kV power cable that is easy to tap. Background Technology

[0002] Cables are wire products that transmit electrical (magnetic) energy, information, or realize the conversion of electromagnetic energy. They are widely used, and there are many types of cables depending on the usage requirements. 35kV belongs to medium voltage cables and usually uses a three-core structure. Because the phase-to-phase insulation problem of medium voltage cables is not prominent, three-core cables are more common.

[0003] However, when using 35kV power cables on the market, it is usually necessary to strip multiple layers of insulation from the taper cable and the main cable to expose the conductor, and then wrap it with tape after wiring. This operation is time-consuming and labor-intensive, and the tapping efficiency is low. In contrast, pre-tapped cables have a fixed structure and current, a limited range of applications, and are inconvenient to use. Utility Model Content

[0004] This utility model provides a 35kV power cable that is easy to tap, which can effectively solve the problems mentioned in the background art. When tapping is required, it is usually necessary to strip the multiple layers of insulation of the tapping cable and the main cable in sequence to expose the conductor part, and then wrap it with tape layer by layer after wiring. This operation is time-consuming and labor-intensive, and the tapping efficiency is low. Furthermore, the structure and current of the pre-tapped cable are fixed, and the applicable range is small, making it inconvenient to use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a kV power cable that is easy to tap, comprising inner conductors, the outer sides of the three inner conductors being wrapped inside an outer insulation layer, and a tapping assembly being provided on the outer side of the outer insulation layer, the tapping assembly comprising a positioning hole, a conductive tube, a conductive ring, a conductive post, an arc rod, a receiving groove, a compression washer, a rubber sheath, an inflatable washer, and a positioning screw;

[0006] A positioning hole is provided on the outer side of the outer insulation layer corresponding to the position of the inner conductor. A conductive tube is embedded inside the positioning hole and connected to the inner conductor. A conductive ring is welded to one end of the conductive tube near the outer insulation layer. A conductive post is slidably installed inside the conductive tube. An arc-shaped rod is fixedly connected to the top of the conductive post. A storage groove is provided on the inner side of the arc-shaped rod corresponding to the conductive post. The outer sides of the three arc-shaped rods are all wrapped in a rubber sheath. An inflatable gasket is embedded in the rubber sheath on the side near the storage groove. A positioning screw is installed on the outer side of the rubber sheath corresponding to the arc-shaped rod.

[0007] According to the above technical solution, the conductive ring is embedded on the outside of the outer insulating layer, and the outside of the conductive ring is a curved surface that fits the outside of the outer insulating layer.

[0008] According to the above technical solution, a compression washer is fitted inside the receiving groove of the conductive post, and the outer side of the compression washer is rough.

[0009] According to the above technical solution, the three arc-shaped rods are joined together to form a ring, and the outer diameter of the outer insulation layer is equal to the inner diameter of the arc-shaped rod.

[0010] According to the above technical solution, the cross-section of the rubber sheath is L-shaped, and the inflatable gasket is squeezed to close the storage groove.

[0011] According to the above technical solution, the outer insulation layer is filled with flame-retardant adhesive in the gap between the inner conductors, and a support tube is installed through the flame-retardant adhesive in the position between the inner conductors. A connecting hole is opened on one side of the support tube, and the inside of the support tube is filled with a water-swellable rubber strip.

[0012] 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;

[0013] 1. Equipped with a tapping assembly, when it is necessary to tap the cable, strip the insulation layer at the end of the tapping cable, remove the rubber sheath, pull the arc rod, and the tapping cable passes through the center of the compression washer. Wrap the wire at the end of the tapping cable around the compression washer in the storage groove below it, reassemble the arc rod into a ring, then put the rubber sheath on the outside of the arc rod, install the positioning screw to fix it, and complete the tapping operation. The wiring operation is simple and quick.

[0014] The wires inside the receiving groove are squeezed and deformed, and then adhere to the top surface of the conductive ring. The compression washer seals the receiving groove. The tap wires, located inside the compression washer, are tightly squeezed to the outside of the outer insulation layer as the compression washer deforms. The rubber sheath then seals the circular arc rod again to prevent foreign objects from entering, completing the sealing operation. The operation is simple, the tapping efficiency is high, and there are no restrictions on the specifications of the cables being tapped. It is suitable for tapping cables of various specifications and has a wider range of applications.

[0015] 2. Equipped with a support tube, connecting hole, and water-swellable rubber strip, the cable's internal support tube enhances its compressive strength. The water-swellable rubber strip deforms and buffers when squeezed, reducing the chance of cable breakage. If excessive pressure causes the outer insulation layer and flame-retardant adhesive to crack, external water can enter the connecting hole. The water-swellable rubber strip expands upon contact with water, squeezing and sealing the cracked area, protecting the inside of the cable and enhancing its safety. Attached Figure Description

[0016] 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.

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the tapping assembly of this utility model;

[0020] Figure 3 This is a schematic diagram of the installation structure of the conductive column of this utility model;

[0021] Figure 4 This is a schematic diagram of the installation structure of the support tube of this utility model;

[0022] The diagram labels are: 1. Inner conductor; 2. Outer insulation layer;

[0023] 3. Tap assembly; 301. Positioning hole; 302. Conductive tube; 303. Conductive ring; 304. Conductive post; 305. Arc rod; 306. Storage groove; 307. Compression washer; 308. Rubber sleeve; 309. Inflatable washer; 310. Positioning screw;

[0024] 4. Flame-retardant adhesive; 5. Support tube; 6. Connecting hole; 7. Water-swellable rubber strip. Detailed Implementation

[0025] 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.

[0026] Example: Figure 1-4 As shown, this utility model provides a technical solution for a 35kV power cable that is easy to tap, including inner conductors 1. The outer sides of the three inner conductors 1 are all wrapped inside the outer insulation layer 2. A tapping assembly 3 is provided on the outer side of the outer insulation layer 2. The tapping assembly 3 includes a positioning hole 301, a conductive tube 302, a conductive ring 303, a conductive post 304, an arc rod 305, a storage groove 306, a compression washer 307, a rubber sheath 308, an air washer 309, and a positioning screw 310.

[0027] A positioning hole 301 is provided on the outer side of the outer insulation layer 2 at the position corresponding to the inner conductor 1. A conductive tube 302 is embedded inside the positioning hole 301. The conductive tube 302 is connected to the inner conductor 1. A conductive ring 303 is welded to one end of the conductive tube 302 near the outer insulation layer 2. The conductive ring 303 is embedded on the outer side of the outer insulation layer 2. The outer side of the conductive ring 303 is a curved surface that fits the outer side of the outer insulation layer 2, making the outer side of the cable smoother and easier to operate. A conductive post 304 is slidably installed inside the conductive tube 302. An arc-shaped rod 305 is fixedly connected to the top of the conductive post 304. A receiving groove 306 is provided on the inner side of the arc-shaped rod 305 corresponding to the conductive post 304. A compression washer is fitted inside the receiving groove 306 where the conductive post 304 is located. 307. The outer surface of the compression washer 307 is rough, which facilitates the compression washer 307 to compress and fix the connected wire. The outer sides of the three arc-shaped rods 305 are all wrapped inside the rubber sheath 308. The three arc-shaped rods 305 are joined together to form a ring. The outer diameter of the outer insulation layer 2 is equal to the inner diameter of the arc-shaped rods 305, which facilitates the rubber sheath 308 to be fitted onto the outer side of the arc-shaped rods 305 for fixation. An inflatable washer 309 is embedded in the rubber sheath 308 near the storage groove 306. The cross-section of the rubber sheath 308 is L-shaped. The inflatable washer 309 compresses and seals the storage groove 306 to improve the sealing effect at the connection point and prevent dust from entering. Positioning screws 310 are installed on the outer side of the rubber sheath 308 corresponding to the arc-shaped rods 305.

[0028] Flame-retardant adhesive 4 is filled in the gap between the inner conductors 1 inside the outer insulation layer 2. Support tubes 5 are installed through the flame-retardant adhesive 4 between the inner conductors 1. A connecting hole 6 is opened on one side of the support tube 5. Water-swellable rubber strips 7 are filled inside the support tube 5.

[0029] The working principle and usage process of this utility model are as follows: After the cable is laid, when it is necessary to split the cable, the insulation layer at the end of the split cable is stripped, the positioning screw 310 is loosened, the rubber sheath 308 is removed, the arc rod 305 is pulled, the conductive post 304 slides along the conductive tube 302, the split cable passes through the center of the compression washer 307, and the wire at the end of the split cable is wrapped around the compression washer 307 in the receiving groove 306. After completing the preliminary wiring operation of the three conductive posts 304 in sequence, the arc rod 305 is reassembled into a ring, and then the rubber sheath 308 is fitted onto the outside of the arc rod 305 and the positioning screw 310 is installed to fix it, thus completing the split operation. The wiring operation is simple and quick.

[0030] During the above process, the wires in the receiving groove 306 are squeezed and deformed, and adhere to the top surface of the conductive ring 303, thus connecting the circuit. The compression washer 307 seals the receiving groove 306. The tap wires located inside the compression washer 307 will be tightly squeezed to the outside of the outer insulation layer 2 due to the deformation of the compression washer 307. The rubber sheath 308 seals the circular arc rod 305 again to prevent foreign objects from entering, thus completing the sealing operation. The operation is simple, the tapping efficiency is high, and there are no restrictions on the specifications of the cables to be tapped. It is suitable for tapping cables of various specifications and has a wider range of applications.

[0031] The cable's internal support tube 5 enhances its compressive strength, and the water-swellable rubber strip 7 deforms and buffers when squeezed, reducing the chance of cable breakage. If the pressure is too high and causes the outer insulation layer 2 and flame-retardant adhesive 4 to break, external water will enter the connecting hole 6. The water-swellable rubber strip 7 expands when it comes into contact with water, squeezing and sealing the broken area to protect the inside of the cable, thus making the cable safer to use.

[0032] 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. A 35kV power cable with easy branching, comprising an inner conductor (1), characterized in that: The three inner conductors (1) are all wrapped inside the outer insulation layer (2). A tap assembly (3) is provided on the outside of the outer insulation layer (2). The tap assembly (3) includes a positioning hole (301), a conductive tube (302), a conductive ring (303), a conductive post (304), an arc rod (305), a storage groove (306), a compression washer (307), a rubber sheath (308), an inflatable washer (309), and a positioning screw (310). A positioning hole (301) is provided on the outer side of the outer insulation layer (2) at the position corresponding to the inner conductor (1). A conductive tube (302) is embedded inside the positioning hole (301). The conductive tube (302) is connected to the inner conductor (1). A conductive ring (303) is welded to one end of the conductive tube (302) near the outer insulation layer (2). A conductive post (304) is slidably installed inside the conductive tube (302). An arc-shaped rod (305) is fixedly connected to the top of the conductive post (304). A storage groove (306) is provided on the inner side of the arc-shaped rod (305) corresponding to the conductive post (304). The outer sides of the three arc-shaped rods (305) are all wrapped in a rubber sleeve (308). An inflatable gasket (309) is embedded on the side of the rubber sleeve (308) near the storage groove (306). A positioning screw (310) is installed on the outer side of the rubber sleeve (308) corresponding to the arc-shaped rod (305).

2. A 35kV power cable with easy branching according to claim 1, characterized in that, The conductive ring (303) is embedded on the outside of the outer insulating layer (2), and the outside of the conductive ring (303) is a curved surface that fits the outside of the outer insulating layer (2).

3. A 35kV power cable with easy branching according to claim 1, characterized in that, The conductive post (304) is fitted with a compression washer (307) inside the receiving groove (306), and the outer side of the compression washer (307) is rough.

4. A 35kV power cable with easy branching according to claim 1, characterized in that, The three arc-shaped rods (305) are joined together to form a ring, and the outer diameter of the outer insulating layer (2) is equal to the inner diameter of the arc-shaped rod (305).

5. A 35kV power cable with easy branching according to claim 1, characterized in that, The rubber sheath (308) has an L-shaped cross section, and the inflatable gasket (309) is squeezed to close the storage groove (306).

6. A 35kV power cable with easy branching according to claim 1, characterized in that, The outer insulation layer (2) is filled with flame-retardant adhesive (4) in the gap between the inner conductors (1). The flame-retardant adhesive (4) is installed with a support tube (5) through the position between the inner conductors (1). A connecting hole (6) is opened on one side of the support tube (5). The support tube (5) is filled with a water-swellable rubber strip (7).

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