Copper-aluminum transition connection fitting for 35KV cable tower and power transmission system

Abstract

The utility model relates to the technical field of power transmission systems, and provides a copper-aluminum transition connection fitting for a 35KV cable tower and a power transmission system, and the copper-aluminum transition connection fitting comprises a copper-aluminum transition plate. The cable terminal connecting plate, the lightning arrester serial connecting plate, the insulator string connecting ring and the equipment wire clamp are all distributed on the copper-aluminum transition plate; wherein the cable terminal connecting plate is used for connecting a cable terminal; the lightning arrester serial connection plate is used for connecting a lightning arrester; the insulator string connecting ring is used for connecting an insulator string; the equipment wire clamp is used for connecting a jumper wire. According to the copper-aluminum transition connection fitting for the 35KV cable tower and the power transmission system provided by the utility model, the connection mode of equipment on the cable tower is simplified, and the trip failure rate caused by discharge due to insufficient gaps is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power transmission systems, in particular to a copper-aluminum transition connection fitting for a 35KV cable tower and a power transmission system. Background Art

[0002] At the terminal tower of the cable tower, the transmission line needs to convert the cable and the overhead wire. The connection terminal of the cable terminal is usually a copper terminal, and the overhead line usually uses a steel-core aluminum stranded wire. Due to the different potentials of copper and aluminum, the contact part of the copper and aluminum equipment will accelerate the oxidation of the aluminum wire due to the galvanic reaction, and the copper-aluminum joint will have poor contact over time. Therefore, it is necessary to use copper-aluminum transition hardware such as copper-aluminum transition clamps or transition plates for transition.

[0003] In the prior art, the cable terminal tower needs to be equipped with lightning arresters and insulators to protect and support the cable terminal head. Usually, when the cable is on the tower, the copper-aluminum transition fittings are used to connect the cable terminal head and the jumper (or down conductor). The insulator string supports the jumper (or down conductor) through the wire clamp, and the lightning arrester terminal is connected to the jumper (or down conductor) through another lead.

[0004] However, due to the two-to-two connections, there are many connectors and additional leads, which may lead to discharge and tripping due to insufficient gaps in strong winds. Utility Model Content

[0005] The utility model provides a copper-aluminum transition connection fitting and a power transmission system for a 35KV cable tower, which are used to solve the defects of the copper-aluminum transition connection fitting in the prior art that the copper-aluminum transition connection fitting has many connecting parts and additional leads, and is prone to discharge and tripping due to insufficient gap in harsh environments. The utility model simplifies the connection method of the cable tower equipment and reduces the tripping failure rate caused by discharge due to insufficient gap.

[0006] The utility model provides a copper-aluminum transition connection fitting for a 35KV cable tower, comprising:

[0007] Copper-aluminum transition plate;

[0008] The cable terminal head connection plate, the arrester series connection plate, the insulator string connection ring and the equipment wire clamp are all distributed and arranged on the copper-aluminum transition plate;

[0009] Among them, the cable terminal head connection plate is used to connect the cable terminal head; the lightning arrester series connection plate is used to connect the lightning arrester; the insulator string connection ring is used to connect the insulator string; and the equipment wire clamp is used to connect the jumper.

[0010] According to the copper-aluminum transition connection fitting for a 35KV cable tower provided by the utility model, the cable terminal head connection plate and the equipment wire clamp are respectively located on both sides of the copper-aluminum transition plate.

[0011] According to the utility model, a copper-aluminum transition connection fitting for a 35KV cable tower is provided, which also includes:

[0012] A pair of hanging plates are hung with the copper-aluminum transition plate, and the insulator string connecting ring is arranged between the pair of hanging plates.

[0013] According to the copper-aluminum transition connection fitting for a 35KV cable tower provided by the utility model, the arrester series connection plate is arranged between one of the hanging plates and the copper-aluminum transition plate.

[0014] According to a copper-aluminum transition connection fitting for a 35KV cable tower provided by the utility model, the copper-aluminum transition plate, the arrester series connection plate, the insulator string connection ring and the hanging plate are connected by a connecting piece, and the length of the connecting piece is greater than the sum of the thicknesses of the copper-aluminum transition plate, the arrester series connection plate, the insulator string connection ring and the hanging plate.

[0015] According to the copper-aluminum transition connection fitting for a 35KV cable tower provided by the utility model, an arc-shaped long hole is opened on the copper-aluminum transition plate, and the arc-shaped long hole corresponds to the position of the hanging plate.

[0016] According to the copper-aluminum transition connection fitting for a 35KV cable tower provided by the utility model, the central angle corresponding to the arc-shaped long hole is 30 degrees.

[0017] According to a copper-aluminum transition connection fitting for a 35KV cable tower provided by the utility model, the cable terminal head connection plate is square, and an angle is formed between the edge of the cable terminal head connection plate and the copper-aluminum transition plate; a right-angle chamfer structure is provided at the position of the copper-aluminum transition plate and the cable terminal head connection plate, and the hypotenuse of the right-angle chamfer structure is greater than the side length of the cable terminal head connection plate.

[0018] According to the copper-aluminum transition connection fitting for a 35KV cable tower provided by the utility model, the cable terminal head connection plate and the equipment wire clamp are both connected to the copper-aluminum transition plate through fasteners.

[0019] The utility model also provides a power transmission system, comprising

[0020] A pole tower, on which a cable terminal head, a lightning arrester, an insulator string and a jumper are arranged;

[0021] The copper-aluminum transition connection fitting for a 35KV cable tower as described above; the cable terminal head, the lightning arrester, the insulator string and the jumper are all connected to the copper-aluminum transition connection fitting for a 35KV cable tower.

[0022] The utility model provides a copper-aluminum transition connection fitting for a 35KV cable tower, which is distributed on the copper-aluminum transition plate through a cable terminal head connection plate, a lightning arrester series connection plate, an insulator string connection ring and an equipment wire clamp; wherein the cable terminal head connection plate is used to connect the cable terminal head; the lightning arrester series connection plate is used to connect the lightning arrester; the insulator string connection ring is used to connect the insulator string; the equipment wire clamp is used to connect the jumper, which simplifies the connection method of the cable tower equipment and reduces the tripping failure rate caused by insufficient gap discharge.

[0023] The utility model also provides a power transmission system, which comprises the copper-aluminum transition connection fitting for the 35KV cable tower as described above, and thus has the various advantages as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are 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.

[0025] Figure 1 It is a structural schematic diagram of the copper-aluminum transition connection fitting for 35KV cable tower provided by the utility model;

[0026] Figure 2 yes Figure 1 Schematic diagram of the structure of AA;

[0027] Figure 3 This is a front view of a use scenario of a copper-aluminum transition connection fitting for a 35KV cable tower in an embodiment of the utility model;

[0028] Figure 4 This is a side view of a use scenario of a copper-aluminum transition connection fitting for a 35KV cable tower in an embodiment of the utility model;

[0029] Figure 5 This is an enlarged schematic diagram of the use scenario of the copper-aluminum transition connection fittings for 35KV cable towers in the embodiment of the utility model;

[0030] Reference numerals:

[0031] 1. Copper-aluminum transition plate; 2. Cable terminal connection plate; 3. Lightning arrester series connection plate; 4. Insulator series connection ring; 5. Equipment wire clamp; 6. Hanging plate; 7. Connector; 8. Arc-shaped long hole;

[0032] 100. Copper-aluminum transition connection fittings for 35KV cable towers; 200. Cable terminal head; 300. Lightning arrester; 400. Insulator string; 500. Jumper; 600. Tower. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model 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 limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] Combine the following Figures 1 to 5 The utility model describes a copper-aluminum transition connection fitting for a 35KV cable tower.

[0036] like Figure 1 The utility model provides a copper-aluminum transition connection fitting for a cable terminal tower, comprising a copper-aluminum transition plate 1, a cable terminal head connection plate 2, a lightning arrester series connection plate 3, an insulator series connection ring 4 and an equipment wire clamp 5. The copper-aluminum transition plate 1 is provided to solve the problem of electrochemical corrosion between copper and aluminum and ensure the stability and durability of the connection.

[0037] The copper-aluminum transition plate 1 is used to solve the electrochemical corrosion and poor contact problems that may occur when copper and aluminum are directly connected. The copper-aluminum transition plate is usually made of a composite material of copper and aluminum, and one or more intermediate layers are introduced to increase the contact area and bonding force to reduce the risk of contact resistance and electrochemical corrosion.

[0038] The cable terminal head connection plate 2, the arrester series connection plate 3, the insulator string connection ring 4 and the equipment wire clamp 5 are all distributed on the copper-aluminum transition plate 1. Among them, the cable terminal head connection plate 2 is used to connect the cable terminal head 200 to ensure the stable connection between the cable and the pole tower. The arrester series connection plate 3 is used to connect the arrester 300 to protect the cable from damage caused by lightning strikes. The insulator string connection ring 4 is used to connect the insulator string 400 to provide electrical isolation and mechanical support between the cable and the pole tower. The equipment wire clamp 5 is used to connect the jumper 500 to ensure the stable connection between the jumper 500 and the pole tower or other equipment. The cable terminal head connection plate 2, the arrester series connection plate 3, the insulator string connection ring 4 and the equipment wire clamp 5 are all distributed on the copper-aluminum transition plate 1, forming an integrated connection system, simplifying the cable tower equipment connection method, and reducing the tripping failure rate caused by insufficient gap discharge.

[0039] In one embodiment of the utility model, the cable terminal connection plate 2 and the equipment wire clamp 5 are respectively located on both sides of the copper-aluminum transition plate 1. This layout is conducive to dispersing the connection points of the cables and equipment wires, thereby reducing the pressure or stress concentration on a specific area of ​​the copper-aluminum transition plate 1, and can effectively disperse the connection load, avoid excessive pressure at a single location, and improve the stability of the connection structure. Moreover, such a layout also helps to optimize the wiring of cables and jumpers, making the cable path clearer and more orderly, and easy to install and maintain.

[0040] In one embodiment of the utility model, a pair of hanging plates 6 are also included, and the pair of hanging plates 6 are both hung with the copper-aluminum transition plate 1, and an insulator string connecting ring 4 is arranged between the pair of hanging plates 6. The hanging plate 6 is an important part of the connecting hardware, which is hung with the copper-aluminum transition plate 1 to provide additional support and stability, ensuring that the insulator string connecting ring 4 can be firmly fixed on the pole tower to prevent loosening or falling off due to wind, rain or other external forces. The insulator string connecting ring 4 is arranged between the two hanging plates 6 to connect the insulator string 400. Such a design can ensure a stable connection between the insulator string 400 and the pole tower, and also provide necessary electrical isolation and mechanical support. Among them, the hanging plate 6 can be in a long strip shape, and the extension direction of the hanging plate 6 is perpendicular to the length direction of the copper-aluminum transition plate 1.

[0041] In one embodiment of the utility model, a lightning arrester series connection plate 3 is arranged between one of the hanging plates 6 and the copper-aluminum transition plate 1. The lightning arrester series connection plate 3 is used to connect the lightning arrester 300. Such a design enables the lightning arrester to be directly and firmly connected to the copper-aluminum transition plate 1, ensuring that the cable system can be effectively protected in thunderstorm weather. The insulator string connection ring 4 is located between the two hanging plates 6 and is used to connect the insulator string 400 to provide electrical isolation and mechanical support between the cable and the tower 600.

[0042] In one embodiment of the utility model, the copper-aluminum transition plate 1, the arrester series plate 3, the insulator string connection ring 4 and the hanging plate 6 are connected by a connector 7, and the length of the connector 7 is greater than the sum of the thicknesses of the copper-aluminum transition plate 1, the arrester series plate 3, the insulator string connection ring 4 and the hanging plate 6. The connector 7 can be an extended bolt, and specifically, in order to make the connection more secure, two connectors 7 can be used simultaneously.

[0043] In one embodiment of the utility model, an arc-shaped long hole 8 is provided on the copper-aluminum transition plate 1, and the arc-shaped long hole 8 corresponds to the position of the hanging plate 6; a mounting hole is provided on the hanging plate 6, and the position of the arc-shaped long hole 8 corresponds to the position of the mounting hole, so that by appropriately adjusting the position of the hanging plate 6, the inclination angle of the copper-aluminum transition plate 1 can be adjusted accordingly to facilitate connection with the cable terminal head 200.

[0044] In one embodiment of the utility model, the central angle corresponding to the arc-shaped long hole 8 is 30 degrees, so that the hanging plate 6 or the copper-aluminum transition plate 1 has different installation angles, thereby correspondingly connecting the cable terminal head connecting plate 2 and the cable terminal head 200 at a suitable angle.

[0045] It should be noted that the central angle corresponding to the arc-shaped long hole 8 can also be set to other angles, as long as the angle adjustment of the copper-aluminum transition plate 1 can be achieved.

[0046] In one embodiment of the utility model, the cable terminal head connecting plate 2 is square, and the angle between the edge of the cable terminal head connecting plate 2 and the edge of the copper-aluminum transition plate 1 is an acute angle; the position of the copper-aluminum transition plate 1 and the cable terminal head connecting plate 2 is provided with a right-angle chamfer structure, and the hypotenuse of the right-angle chamfer structure is greater than the side length of the cable terminal head connecting plate 2, which can make it easier to install the cable terminal head connecting plate 2 to the corresponding position of the copper-aluminum transition plate 1 and achieve good positioning and alignment. At the same time, it is more convenient to connect the cable terminal head 200 and the cable terminal head connecting plate 2.

[0047] In one embodiment of the utility model, the cable terminal head connection plate 2 and the equipment wire clamp 5 are connected to the copper-aluminum transition plate 1 by fasteners. The selection and application of fasteners are crucial to the stability and reliability of the connection. The fasteners need to be selected according to certain specifications to ensure that they can firmly connect the cable terminal head connection plate 2, the equipment wire clamp 5 and the copper-aluminum transition plate 1. The appropriate selection of fastener materials and sizes can ensure that the connection has sufficient mechanical strength and electrical connection performance. The design of connecting the cable terminal head connection plate 2 and the equipment wire clamp 5 to the copper-aluminum transition plate 1 by fasteners can effectively solve the problems in the copper-aluminum connection and improve the stability and reliability of the equipment. This connection method has been widely used in the connection of electrical equipment in the fields of electricity, electronics, communications, and transportation.

[0048] The copper-aluminum transition connection fittings for the cable terminal provided by the utility model, the size of the copper-aluminum transition plate 1 needs to be selected after calculation based on the size of the equipment wire clamp, the cable terminal head connection plate 2, the arrester series connection plate 3 and the insulator string connection ring 4. The copper plate of the copper-aluminum transition plate 1 is provided with a 30-degree bevel at the lower end, and the length of the beveled side of the bevel is greater than the side length of the cable terminal head connection plate 2. The copper plate of the copper-aluminum transition plate 1 is connected to the cable terminal head connection plate 2 by bolts, and the copper-aluminum transition plate 1 and the cable terminal head 200 after connection form an angle of approximately 120 degrees.

[0049] The device wire clamp 5 is a corresponding aluminum device wire clamp selected according to the model of the jumper wire 500. The device wire clamp 5 is connected to the aluminum plate of the copper-aluminum transition plate 1 by bolts and is crimped to the jumper wire 500.

[0050] The connection hole positions on the equipment wire clamp 5 and the cable terminal head connection plate 2 should be checked before drilling holes on the copper-aluminum transition plate 1.

[0051] A pair of hanging plates 6 are installed near the transition side of the aluminum plate of the copper-aluminum transition plate 1. The bolt length of the hanging plate 6 needs to be longer than that of the national standard parts so that the bolts can pass through the hanging plate 6, the insulator string connecting ring 4 and the lightning arrester series plate 3.

[0052] The arrester 300 is installed above the copper-aluminum transition plate 1 and is connected to the copper-aluminum transition plate 1 through the arrester series plate 3. The arrester series plate 3 is placed between the hanging plate 6 and the aluminum plate of the copper-aluminum transition plate 1 and is fixed by two sets of bolts of the hanging plate 6.

[0053] The insulator string 400 is installed below the copper-aluminum transition plate 1 and connected to the hanging plate 6 through the insulator string connecting ring 4. The insulator string connecting ring 4 is located between the two plates of the hanging plate 6 and is fixed by two sets of bolts of the hanging plate.

[0054] In order to make the connection of each component convenient and flexible, the contact surfaces of the copper-aluminum transition plate 1 connected to the equipment wire clamp 5 and the cable terminal head connection plate 2 are usually polished on both sides to ensure close contact.

[0055] The hole at the connection between the copper-aluminum transition plate 1 and the extended bolt on the lower side of the hanging plate 6 is a 30-degree arc-shaped long hole, so that the inclination angle of the copper-aluminum transition plate 1 can be adjusted after installation to facilitate connection with the cable terminal head 200.

[0056] The plane of the cable terminal head connecting plate 2 is placed perpendicular to the horizontal plane, and the inclination angle of the cable terminal head connecting plate 2 is adjusted to make the two parallel to each other. After the two are connected, the cable is fixed on the pole tower from top to bottom.

[0057] After the cables are connected, use a rope to compare the length of the jumper 500 and the position of the equipment clamp 5. First, put the equipment clamp 5 into the crimping, and then press the connecting plates at both ends of the jumper 500 to make the jumper 500 as beautiful as possible.

[0058] The power transmission system provided by the utility model is described below. The power transmission system described below and the copper-aluminum transition connection fittings for 35KV cable towers described above can be referred to each other.

[0059] The second aspect of the utility model is to provide a power transmission system, including a tower 600 and a copper-aluminum transition connection fitting 100 for a 35KV cable tower as in any of the above embodiments, wherein the tower 600 is provided with a cable terminal head 200, a lightning arrester 300, an insulator string 400 and a jumper 500; the cable terminal head 200, the lightning arrester 300, the insulator string 400 and the jumper 500 are all connected to the copper-aluminum transition connection fitting 100 for a 35KV cable tower.

[0060] The power transmission system provided by the embodiment of the second aspect of the utility model has the various advantages as described above because it includes the copper-aluminum transition connection fittings of the cable terminal tower as described above.

[0061] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A copper-aluminum transition connection fitting (100) for a 35KV cable tower, characterized in that: include: Copper-aluminum transition plate (1); The cable terminal head connection plate (2), the lightning arrester series connection plate (3), the insulator string connection ring (4) and the equipment wire clamp (5) are all distributed and arranged on the copper-aluminum transition plate (1); The cable terminal head connection plate (2) is used to connect the cable terminal head (200); the lightning arrester series connection plate (3) is used to connect the lightning arrester (300); the insulator string connection ring (4) is used to connect the insulator string (400); and the equipment wire clamp (5) is used to connect the jumper (500).

2. The copper-aluminum transition connection fitting for 35KV cable tower according to claim 1 is characterized in that: The cable terminal head connection plate (2) and the equipment wire clamp (5) are respectively located on two sides of the copper-aluminum transition plate (1).

3. The copper-aluminum transition connection fitting for 35KV cable tower according to claim 1 is characterized in that: Also includes: A pair of hanging plates (6) are hung on the copper-aluminum transition plate (1), and the insulator string connecting ring (4) is arranged between the pair of hanging plates (6).

4. The copper-aluminum transition connection fitting for 35KV cable tower according to claim 3 is characterized in that: The arrester series connection plate (3) is arranged between one of the hanging plates (6) and the copper-aluminum transition plate (1).

5. The copper-aluminum transition connection fitting for 35KV cable tower according to claim 4 is characterized in that: The copper-aluminum transition plate (1), the lightning arrester series connection plate (3), the insulator string connection ring (4) and the hanging plate (6) are connected by a connecting piece (7), and the length of the connecting piece (7) is greater than the sum of the thicknesses of the copper-aluminum transition plate (1), the lightning arrester series connection plate (3), the insulator string connection ring (4) and the hanging plate (6).

6. The copper-aluminum transition connection fitting for 35KV cable tower according to claim 3 is characterized in that: The copper-aluminum transition plate (1) is provided with an arc-shaped long hole (8), and the position of the arc-shaped long hole (8) corresponds to that of the hanging plate (6).

7. The copper-aluminum transition connection fitting for 35KV cable tower according to claim 6, characterized in that: The central angle corresponding to the arc-shaped long hole (8) is 30 degrees.

8. The copper-aluminum transition connection fitting for 35KV cable tower according to claim 1, characterized in that: The cable terminal head connection plate (2) is square, and an angle is formed between the edge of the cable terminal head connection plate (2) and the copper-aluminum transition plate (1); a right-angle chamfer structure is provided at the position between the copper-aluminum transition plate (1) and the cable terminal head connection plate (2), and the hypotenuse of the right-angle chamfer structure is greater than the side length of the cable terminal head connection plate (2).

9. The copper-aluminum transition connection fitting for 35KV cable tower according to claim 1, characterized in that: The cable terminal head connection plate (2) and the equipment wire clamp (5) are both connected to the copper-aluminum transition plate (1) via fasteners (9).

10. A power transmission system, characterized in that: include: A pole tower (600), wherein the pole tower (600) is provided with a cable terminal head (200), a lightning arrester (300), an insulator string (400) and a jumper (500); According to the copper-aluminum transition connection fitting (100) for a 35KV cable tower as described in any one of claims 1 to 9, the cable terminal head (200), the lightning arrester (300), the insulator string (400) and the jumper (500) are all connected to the copper-aluminum transition connection fitting (100) for a 35KV cable tower.

Images