Overground 10kV cable intermediate joint device

Abstract

The invention relates to an intermediate joint device for an overground 10kV cable. Relates to improvement of a power distribution network underground cable joint device. And the connecting part is arranged above the water level, so that the maintenance and repair are convenient. Two sides of the cable well are respectively communicated with cable pipelines, a first cable and a second cable which extend into the cable well are respectively arranged in the cable pipelines on the two sides, a box body is arranged at the top of the cable well, a partition plate is arranged in the middle of the box body, a cable connecting device is arranged in the center of the plate surface of the partition plate, and the cable connecting device comprises a copper bar support and three groups of n-shaped copper bars; cable joints are respectively arranged at the wire end parts of the first and second cables, and the wire end parts of the first and second cables are fixedly connected with the cable joints, penetrate through the partition plate from bottom to top, and then are connected to the copper bar wiring position. According to the invention, the technical tradition is broken through, and the middle joint of the 10kV underground cable of the distribution network is arranged on the top, so that the bubble condition is effectively avoided; and on the ground, maintenance and repair are more efficient, more convenient and safer for operators on the production line.

Description

Technical Field

[0001] This technology relates to the field of power distribution technology, and in particular to the improvement of underground cable joint devices for power distribution networks. Background Technology

[0002] Underground 10kV cables are common power transmission facilities in urban power distribution networks, and their safe and stable operation is crucial for ensuring power supply. Typical faults during actual operation include flashover faults, conductor breaks, and grounding faults. The main causes of these accidents are as follows: Firstly, insulation aging and moisture absorption: Manufacturing defects, poor sealing of terminal joints, or punctures by external objects can damage the insulation layer, causing the cable to become damp or corroded. Second, overload and overvoltage: Long-term overload operation generates overheating, or external factors such as lightning strikes trigger overvoltage surges, accelerating insulation aging. Thirdly, external mechanical damage: construction excavation, vehicle running over, etc., directly damage the cable structure. In addition, in areas with more rainfall in the south, the intermediate joints of underground cables are located at the bottom of the cable well, and during the rainy season, they are submerged in water for half or even more of the year.

[0003] A 10kV cable joint device is used to connect two sections of 10kV cable, ensuring the cable line is continuous and maintaining its electrical performance. How to address the reality of dampness and water damage at 10kV cable joints in rainy southern regions, improve safety, and facilitate maintenance and repair of the cable joints has become a pressing technical problem for basic power workers. Summary of the Invention

[0004] To address the above-mentioned technical problems, this invention provides a ground-based 10kV cable intermediate joint device that places the connection point above the water level and facilitates maintenance and repair.

[0005] This invention discloses a ground-mounted 10kV cable intermediate joint device, comprising a cable well with cable ducts connected to both sides. Cable 1 and Cable 2, extending into the cable well, are respectively installed within the cable ducts on both sides. A box is provided at the top of the cable well, and a partition is provided in the middle of the box. A cable connection device is provided at the center of the partition. The cable connection device includes a copper busbar support and three sets of U-shaped copper busbars. The three sets of copper busbars are connected to the copper busbar support through insulating sleeves. Copper busbar terminals are provided on the two vertical sections of the U-shaped copper busbars. Each wire end of the branched cable 1 and cable 2 is provided with a cable connector. After the cable connector is fixedly connected to each wire end of the branched cable 1 and cable 2, it extends from bottom to top through the partition and onto the partition, and then connects to the copper busbar terminal.

[0006] Furthermore, redundant sections are respectively provided for cable one and cable two in the cable well.

[0007] Furthermore, the cable well is provided with a deepened area for accommodating redundant sections of cable one and cable two.

[0008] Furthermore, the partition of the box body divides the box body into an upper box body and a lower box body. The top of the upper box body is provided with a top cover, and the bottom of the lower box body is open.

[0009] Furthermore, operating doors are respectively provided on the side portions of the lower and upper housings.

[0010] Furthermore, ventilation openings are provided on the sides of the lower and upper housings respectively.

[0011] Furthermore, a clamping mechanism is provided between the cable connector and the partition.

[0012] Furthermore, a live indicator and a surge arrester are also provided at the copper busbar connection point.

[0013] This invention addresses the practical technical problems faced by production line workers, specifically the various drawbacks associated with maintaining intermediate joints in 10kV underground distribution cables. Breaking with traditional techniques, it places the intermediate joints of these cables "above ground," above the surface. This firstly, by positioning the connection point "high," effectively preventing water damage; secondly, being above ground makes maintenance and repair more efficient, convenient, and safe for production line operators. Compared to existing technologies that fabricate high-standard cable intermediate joints on-site at the bottom of underground cable wells, this invention offers simpler construction, higher safety, and eliminates distribution network faults caused by water damage and moisture. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 2 yes Figure 1 Left view, Figure 3 This is a schematic diagram of the copper busbar structure in this invention. Figure 4 This is a schematic diagram of an optimized embodiment of the present invention. Figure 5 yes Figure 4 Left view, Figure 6 This is the electrical wiring diagram of the present invention. Figure 7 This is a schematic diagram of the external structure of the present invention. Figure 8 yes Figure 7 The left view; In the diagram, 1 is the enclosure, 11 is the upper enclosure, 12 is the lower enclosure, 13 is the partition, 14 is the top cover, 15 is the connecting seat, 2 is the copper busbar, 21 is the insulating sleeve, 22 is the copper busbar support, 23 is the copper busbar wiring position, 3 is the cable joint, 41 is cable one, 411 is the cable one branch, 42 is cable two, 412 is the cable two branch, 5 is the cable well, 51 is the deepened area, 6 is the cable duct, 7 is the live indicator, and 8 is the surge arrester. Detailed Implementation

[0015] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0016] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0017] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0018] In the description of this invention, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating a connection between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; 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 refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] The present invention provides a ground-based 10kV cable intermediate joint device, such as... Figure 1-8The cable well 5 includes cable ducts 6 connected to both sides. Cable 41 and cable 42, which extend into the cable well 5, are respectively installed in the cable ducts 6 on both sides. A box 1 is installed at the top of the cable well 5. A partition 13 is installed in the middle of the box 1. A cable connection device is installed at the center of the partition 13. The cable connection device includes a copper busbar support 22 and three sets of U-shaped copper busbars 2. The three sets of copper busbars 2 are connected to the copper busbar support 22 through insulating sleeves 21. Copper busbar terminals 23 are respectively provided on the two vertical sections of the U-shaped copper busbars. Each wire end of cable 41 and cable 42 after branching is provided with a cable connector 3. After the cable connector 3 is fixedly connected to each wire end of cable 41 and cable 42 after branching, it extends from bottom to top through the partition 13 and into the partition 13, and then connects to the copper busbar terminal 23.

[0020] To facilitate subsequent use and maintenance, redundant sections are provided for both cable 41 (Cable 1) and cable 42 (Cable 2) within cable well 5. This way, if repairs are needed at the connector end and the faulty cable end needs to be cut off, the redundant length can be used for compensation.

[0021] To improve the service life of primary cabling and increase redundant length, this invention also proposes a technical measure of providing a deepened zone 51 in the cable well 5 to accommodate redundant sections of cable one 41 and cable two 42. Because the 10kV cable includes three phase conductors (A, B, and C), its overall size is relatively large, making it difficult to manually coil it into a small curvature state; therefore, a certain amount of space is required for coiling and placement.

[0022] The partition 13 of the box 1 divides the box 1 into an upper box 11 and a lower box 12. The top of the upper box 11 is provided with a top cover 14, and the bottom of the lower box 12 is open.

[0023] Operating doors are provided on the sides of the lower housing 12 and the upper housing 11, respectively. This facilitates operation.

[0024] Ventilation openings are also provided on the sides of the lower housing 12 and the upper housing 11 to prevent moisture.

[0025] A tightening mechanism is provided between the cable connector 3 and the partition 13. The cable begins to split into three strands (A, B, and C phases) at the lower housing 12. If the three strands are not tightened after extending from the holes in the partition 13, it will lead to poor reliability of the upper connection. Generally, the cable connector 3 is tightened onto the partition 13 after the copper busbar connection 23 is connected, which can effectively prevent loosening and malfunctions.

[0026] The copper busbar connection point 23 is also equipped with a live indicator 7 and a surge arrester 8.

[0027] It should be stated that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to the present invention based on the technical content disclosed in this application. However, such variations, as long as they do not depart from the spirit of the present invention, should be within the protection scope of the present invention. Furthermore, some terminology used in this specification and claims is not limiting, but merely for ease of description.

Claims

1. A ground-mounted 10kV cable intermediate joint device, comprising a cable well (5) with cable ducts (6) connected to both sides, wherein a cable first (41) and a cable second (42) extending into the cable well (5) are respectively arranged in the cable ducts (6) on both sides, characterized in that, A box (1) is provided at the top of the cable well (5). A partition (13) is provided in the middle of the box (1). A cable connection device is provided at the center of the partition (13). The cable connection device includes a copper busbar support (22) and three sets of U-shaped copper busbars (2). The three sets of copper busbars (2) are connected to the copper busbar support (22) through insulating sleeves (21). The two upright sections of the U-shaped copper busbars are respectively provided with copper busbar connection positions (23). Each end of the cable after the branching of cable one (41) and cable two (42) is provided with a cable connector (3). After the cable connector (3) is fixedly connected to each end of the branching of cable one (41) and cable two (42), it extends from bottom to top through the partition (13) and onto the partition (13), and then connects to the copper busbar terminal (23).

2. The ground-mounted 10kV cable intermediate joint device according to claim 1, characterized in that, The cable one (41) and cable two (42) are respectively provided with redundant sections in the cable well (5).

3. The ground-mounted 10kV cable intermediate joint device according to claim 1, characterized in that, The cable well (5) is provided with a deepening zone (51) for placing redundant sections of the first cable (41) and the second cable (42).

4. The ground-mounted 10kV cable intermediate joint device according to claim 1, characterized in that, The box (1) is divided into an upper box (11) and a lower box (12) by a partition (13). The upper box (11) is provided with a top cover (14) and the bottom of the lower box (12) is open.

5. A ground-mounted 10kV cable intermediate joint device according to claim 4, characterized in that, Operating doors are provided on the side of the lower box (12) and the upper box (11).

6. The above-ground 10kV cable intermediate joint device according to claim 5, characterized in that, Ventilation openings are also provided on the sides of the lower box (12) and the upper box (11).

7. A ground-mounted 10kV cable intermediate joint device according to claim 1, characterized in that, A clamping mechanism is provided between the cable connector (3) and the partition (13).

8. The ground-mounted 10kV cable intermediate joint device according to claim 1, characterized in that, The copper busbar connection point (23) is also equipped with a live indicator (7) and a surge arrester (8).

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