Lightning arrester convenient to assemble

Abstract

The utility model discloses a lightning arrester convenient to assemble, which relates to the insulator field and comprises a central connecting column, a threaded rod is fixed at the top end of the central connecting column, a cylindrical cover is in threaded fit with the top end of the threaded rod, an annular groove is formed in the middle of the outer ring of the cylindrical cover, and two fixing rods are arranged in the annular groove in a sliding manner. Extending grooves are formed in the ends, away from the cylindrical cover, of the two fixing rods, extending rods are arranged in the extending grooves in a sliding mode, an arc-shaped protection plate is fixedly connected to one ends of the two extending rods, and a wiring terminal is fixed to the top end of the cylindrical cover. The distance between the cylindrical cover and the top end of the central connecting column is shortened, so that the height of the lightning arrester is shortened, the wiring terminal can adapt to and be connected with cables with different lengths conveniently, actual installation is facilitated, meanwhile, the cylindrical cover is rotated upwards, the height of the lightning arrester can be increased, and the supporting force on the cylindrical cover can be increased through the arrangement of the spring.

Description

Technical Field

[0001] This utility model relates to the field of insulators, and in particular to a surge arrester that is easy to assemble. Background Technology

[0002] A surge arrester is an electrical device used to protect electrical equipment from high transient overvoltages and to limit the duration and amplitude of follow current. It includes any external clearance necessary for the normal functioning of the electrical equipment during operation and installation, regardless of whether it is part of the overall system.

[0003] When the surge arrester's terminal block is connected to the power line, the power line length may deviate from the actual installation, resulting in insufficient or excessive connection length, which affects the actual installation.

[0004] Therefore, it is necessary to propose a surge arrester that is easy to assemble to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a surge arrester that is easy to assemble, in order to solve the problem that when the wiring terminal at the top of the surge arrester is connected to a wire, the wire length may deviate in actual installation, resulting in insufficient or excessive connection length, which affects the actual installation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a surge arrester that is easy to assemble, comprising a central connecting column, a threaded rod fixed to the top of the central connecting column, a cylindrical cover threadedly fitted to the top of the threaded rod, an annular groove formed in the middle of the outer ring of the cylindrical cover, two fixed rods slidably disposed within the annular groove, each of the two fixed rods having an extension groove at its end away from the cylindrical cover, an extension rod slidably disposed inside the extension groove, an arc-shaped protective plate fixedly connected to one end of each of the two extension rods, and a terminal block fixed to the top of the cylindrical cover.

[0007] Preferably, the top and bottom of the annular groove are provided with sliding grooves, the two sliding grooves are set in annular shape, and the top and bottom of the fixed rod are connected with sliders.

[0008] Preferably, the two sliders are slidably disposed inside the corresponding grooves, and the bottom ends of the two fixing rods are provided with through holes, the internal threads of which are fitted with fixing screws.

[0009] Preferably, the through hole and the corresponding groove are internally connected, and the top of the fixing screw is pressed against the surface of the fixing rod.

[0010] Preferably, a spring is provided between the bottom end of the cylindrical cover and the top end of the central connecting post, and the spring is sleeved on the outer ring of the threaded rod.

[0011] Preferably, the outer ring of the central connecting post is vertically provided with multiple umbrella skirts, and the bottom end of the central connecting post is fixed with a grounding terminal.

[0012] Preferably, the two sliders are set in an arc shape and are correspondingly fitted inside the groove.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. In the actual operation of this utility model, the user can shorten the distance between the cylindrical cover and the top of the central connecting column by rotating the cylindrical cover downward, thereby shortening the height of the surge arrester, making it easier for the wiring terminals to adapt to the connection of cables of different lengths, and facilitating actual installation. At the same time, rotating the cylindrical cover upward can extend the height of the surge arrester, and the spring setting can increase the support force on the cylindrical cover.

[0015] 2. In the actual operation of this utility model, the two arc-shaped protective plates protect the outside of the wire connection, reducing the impact of external wind and flying objects, which helps to increase the stability of the wire. The extension rod can slide out in the extension groove of the fixed rod to extend the length of the fixed rod, which is convenient for personnel to adjust according to actual needs. The extension rod after the length is adjusted can be fixed with fixing screws.

[0016] 3. Furthermore, the two fixing rods can slide in the annular groove, that is, rotate around the center of the cylindrical cover. Since the terminal block at the top of the cylindrical cover will generate different angles during the up and down rotation, the rotation of the two fixing rods facilitates the rotation of the two arc-shaped protective plates, which can block different directions. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the surge arrester of this utility model that is easy to assemble.

[0018] Figure 2 This is a schematic diagram of the arc-shaped protective plate structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of the fixing screw of this utility model.

[0020] In the diagram: 1. Central connecting post; 2. Umbrella skirt; 3. Threaded rod; 4. Grounding terminal; 5. Cylinder; 6. Annular groove; 7. Slide groove; 8. Fixing rod; 9. Extending rod; 10. Arc-shaped protective plate; 11. Fixing screw; 12. Spring; 13. Wiring terminal. Detailed Implementation

[0021] This utility model provides, for example Figure 1 - Figure 3The surge arrester shown is easy to assemble and includes a central connecting post 1, a threaded rod 3 fixed to the top of the central connecting post 1, multiple umbrella skirts 2 vertically arranged on the outer ring of the central connecting post 1, and a grounding terminal 4 fixed to the bottom of the central connecting post 1.

[0022] The top of the threaded rod 3 is threaded with a cylindrical cover 5, and a terminal block 13 is fixed to the top of the cylindrical cover 5. A spring 12 is provided between the bottom of the cylindrical cover 5 and the top of the central connecting post 1. The spring 12 is sleeved on the outer ring of the threaded rod 3. The terminal block 13 can be connected to a cable.

[0023] In actual operation of this utility model, the user can rotate the cylindrical cover 5 downward to shorten the distance between the top of the cylindrical cover 5 and the top of the central connecting column 1, thereby shortening the height of the surge arrester, making it easier for the wiring terminal 13 to adapt to the connection of cables of different lengths and facilitating actual installation. At the same time, rotating the cylindrical cover 5 upward can extend the height of the surge arrester, and the spring 12 can increase the supporting force on the cylindrical cover 5.

[0024] Furthermore, an annular groove 6 is provided in the middle of the outer ring of the cylindrical cover 5. Two fixed rods 8 are slidably arranged inside the annular groove 6. Each of the two fixed rods 8 has an extension groove at the end away from the cylindrical cover 5. An extension rod 9 is slidably arranged inside the extension groove. An arc-shaped protective plate 10 is fixedly connected to one end of the two extension rods 9.

[0025] The top and bottom of the annular groove 6 are provided with sliding grooves 7, and the two sliding grooves 7 are set in annular shape. The top and bottom of the fixing rod 8 are connected with sliders. The two sliders are respectively slidably set inside the sliding grooves 7 at corresponding positions. The bottom of the two fixing rods 8 are provided with through holes. The internal threads of the through holes are fitted with fixing screws 11. The through holes are connected to the inside of the corresponding sliding grooves 7. The top of the fixing screws 11 is pressed against the surface of the fixing rod 8. The positions of the two recesses 11 correspond to the positions of the wiring terminals 13. The two sliders are set in arc shape and are correspondingly fitted inside the sliding grooves 7.

[0026] In the actual operation of this utility model, the two arc-shaped protective plates 10 protect the outside of the wire connection, reduce the impact of external wind and flying objects, and help increase the stability of the wire. The extension rod 9 can slide out in the extension groove of the fixed rod 8 to extend the length of the fixed rod 8, which is convenient for personnel to adjust according to actual needs. The extension rod 9 after the length is adjusted can be fixed with the fixing screw 11.

[0027] Furthermore, the two fixing rods 8 can slide in the annular groove 6, that is, rotate around the center of the cylindrical cover 5. Since the terminal 13 at the top of the cylindrical cover 5 will generate different angles during the up and down rotation, the rotation of the two fixing rods 8 facilitates the rotation of the two arc-shaped protective plates 10, which can block different directions.

Claims

1. A surge arrester which is easy to assemble, comprising a central connecting post (1), characterized in that: The top end of the center connecting column (1) is fixed with a threaded rod (3), the top end of the threaded rod (3) is provided with a cylindrical cover (5) in a threaded manner, the middle part of the outer ring of the cylindrical cover (5) is provided with an annular groove (6), the inner side of the annular groove (6) is slidably provided with two fixed rods (8), the end of the two fixed rods (8) away from the cylindrical cover (5) is provided with an extension slot, the inner side of the extension slot is slidably provided with an extension rod (9), one end of the two extension rods (9) is fixedly connected with an arc-shaped protective plate (10), the top end of the cylindrical cover (5) is fixed with a wiring terminal (13), and the bottom end of the wiring terminal (13) is connected with the top end of the center connecting column (1).

2. A surge arrester according to claim 1, characterized in that: The top end and the bottom end of the annular groove (6) are provided with sliding grooves (7), and the two sliding grooves (7) are arranged in an annular shape.

3. A surge arrester according to claim 2, characterized in that: The top end and the bottom end of the fixed rod (8) are connected with sliding blocks.

4. A surge arrester according to claim 3, characterized in that: The two sliding blocks are slidably arranged in the sliding grooves (7) at corresponding positions, the bottom end of the two fixed rods (8) is provided with a through hole, and the through hole is threadedly matched with a fixed screw (11).

5. A surge arrester according to claim 4, characterized in that: The through hole and the sliding groove (7) at the corresponding position are in communication, and the top end of the fixed screw (11) is pressed against the surface of the fixed rod (8).

6. A surge arrester according to claim 5, characterized in that: The bottom end of the cylindrical cover (5) and the top end of the center connecting column (1) are provided with a spring (12), and the spring (12) is sleeved on the outer ring of the threaded rod (3).

7. A surge arrester according to claim 2, characterized in that: The outer ring of the center connecting column (1) is vertically provided with a plurality of umbrella skirts (2), and the bottom end of the center connecting column (1) is fixed with a grounding terminal (4). The two sliding blocks are arranged in an arc shape and are correspondingly matched in the sliding grooves (7).

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