A lightning protection and fusing device

Abstract

The application discloses a lightning arrester fusing device anti-falling mechanism and relates to the technical field of electrical equipment. The anti-falling mechanism comprises a guide ring connected to an outgoing line end support, a falling-prevention fixing ring is nested on the guide ring, a falling-prevention fixing plate is arranged on the outer side of the falling-prevention fixing ring, the guide ring, the falling-prevention fixing ring and the falling-prevention fixing plate are fixedly connected through bolts, and the falling-prevention fixing plate is arranged in close contact with the guide ring. The bottom end of the falling-prevention fixing plate is provided with an elastic anti-falling assembly. The guide ring is directly installed at the lower end of the cavity of the lightning arrester fusing device, the installation direction is not limited by the outgoing line end support, the interference position during replacement of the lightning arrester is effectively avoided, the operation difficulty and the safety risk are significantly reduced, the falling-prevention mechanism is arranged in close contact with the guide ring, the movable plate is prevented from being too long, the anti-falling limit is more accurate, and the hidden danger of lightning arrester falling caused by anti-falling failure is eliminated.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and more specifically to a fall protection mechanism for a lightning protection fuse device. Background Technology

[0002] Lightning arrester fuses are key equipment in power systems that integrate surge arresters and fuses. Their anti-fall mechanism is mainly used to prevent the surge arrester core from falling to the ground when it detaches due to aging or fault, thus ensuring the safety of equipment and personnel.

[0003] The existing fall arrestor mechanism (CN210778063U) has certain structural defects: it is installed on the lower outgoing end bracket of the combined device. When the combined device is installed on the crossarm, the existing fall arrestor mechanism is placed at the ground end of the surge arrester. It relies on the torsion spring on the fall arrestor mechanism to support the raised movable plate to prevent the surge arrester from completely sliding out of the cavity and falling. However, this orientation increases the difficulty of operation and safety risks for the staff. At the same time, the installation position is relatively far from the working point of the core that needs to be limited, resulting in an excessively long movable plate structure. This is not only inconvenient for daily replacement, but also, when the core falls off naturally due to failure or aging, it may experience inertial delay response or even reverse bounce, failing to effectively lock the core. There is a risk that it may "pop" out of the track, causing the fall arrestor function to fail. In addition, the fall arrestor mechanism is made of stainless steel and connected to the outgoing end. If arcing occurs when the core falls off under the extreme working conditions of the surge arrester, it may cause a continuous arcing phenomenon when it falls onto the metal fall arrestor, which may easily cause electrical safety hazards.

[0004] Therefore, there is an urgent need for a fall protection mechanism that uses a lightning protection fuse device that is easy to install and replace, safe, and has a good fall protection effect. Summary of the Invention

[0005] The main objective of this invention is to provide a fall protection mechanism for a lightning protection fuse device to solve the problems existing in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A fall protection mechanism for a lightning protection fuse includes a guide ring connected to a support at the outgoing end, a fall protection fixing ring nested on the guide ring, a fall protection fixing plate disposed on the outer side of the fall protection fixing ring, the guide ring, the fall protection fixing ring and the fall protection fixing plate being fixedly connected by bolts, the fall protection fixing plate being fitted against the guide ring; and an elastic fall protection component disposed at the bottom end of the fall protection fixing plate.

[0007] Furthermore, the elastic fall arrestor assembly includes a fall arrestor movable plate, and the bottom end of the fall arrestor fixed plate is rotatably connected to the fall arrestor movable plate by a rivet. A torsion spring is sleeved on the rivet, one end of the torsion spring is connected to the fall arrestor fixed plate, and the other end is connected to the fall arrestor movable plate.

[0008] Furthermore, both the fixed anti-fall plate and the movable anti-fall plate are made of SMC material.

[0009] Furthermore, the guide ring is threadedly connected to the outlet bracket.

[0010] Compared with the prior art, the present invention has the following beneficial effects: This fall protection mechanism has a guide ring installed directly at the lower end of the lightning arrester's cavity. The installation direction is not restricted by the outgoing end bracket, effectively avoiding interference positions when replacing the lightning arrester, and significantly reducing the difficulty of operation and safety risks.

[0011] The fall arrestor mechanism is set close to the guide ring to avoid excessively long movable plates, making the fall arrestor limit more precise and eliminating the hidden danger of the surge arrester falling due to fall arrestor failure.

[0012] The fixed and movable anti-fall plates are made of SMC composite material, which has both excellent insulation performance and sufficient structural strength, directly avoiding the risk of arc continuation caused by the anti-fall mechanism being a conductor during the arc breaking process of the surge arrester under extreme working conditions. Attached Figure Description

[0013] Figure 1 This is a perspective view of the fall protection mechanism of a lightning protection fuse device according to the present invention.

[0014] Figure 2 This is a disassembly diagram of the fall protection mechanism of a lightning protection fuse device according to the present invention.

[0015] Figure 3 This is a schematic diagram of the elastic fall protection component structure of the fall protection mechanism of a lightning protection fuse device according to the present invention.

[0016] Among them, 1-outgoing end bracket; 2-surge arrester; 3-guide ring; 4-anti-fall fixing ring; 5-anti-fall fixing plate; 6-bolt; 7-anti-fall movable plate; 8-rivet; 9-torsion spring. Detailed Implementation

[0017] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Example 1

[0019] Combination Figures 1-3This invention provides a fall protection mechanism for a lightning protection fuse device, including a guide ring 3 connected to a lead-out end bracket 1. In this embodiment, the guide ring 3 is threadedly connected to the lead-out end bracket 1. A fall protection fixing ring 4 is nested on the guide ring 3, and a fall protection fixing plate 5 is provided on the outer side of the fall protection fixing ring 4. The guide ring 3, the fall protection fixing ring 4, and the fall protection fixing plate 5 are fixedly connected by bolts 6. The fall protection fixing plate 5 is fitted to the guide ring 3. An elastic fall protection component is provided at the bottom end of the fall protection fixing plate 5.

[0020] A surge arrester 2 is installed inside the outgoing terminal bracket 1.

[0021] The elastic fall arrestor assembly includes a fall arrestor movable plate 7. The bottom end of the fall arrestor fixed plate 5 is rotatably connected to the fall arrestor movable plate 7 via a rivet 8. A torsion spring 9 is sleeved on the rivet 8. One end of the torsion spring 9 is connected to the fall arrestor fixed plate 5, and the other end is connected to the fall arrestor movable plate 7.

[0022] By tightly attaching the anti-fall fixing plate 5 to the guide ring 3, the anti-fall movable plate 7 is prevented from being too long and the surge arrester is limited at close range. This avoids the risk of the surge arrester falling due to the surge arrester's own weight inertia rebounding after tripping and excessive movement space, which could cause the surge arrester to lose its anti-fall function.

[0023] Both the anti-fall fixing plate 5 and the anti-fall movable plate 7 are made of SMC material. They are formed by molding SMC material, which has good insulation performance and excellent structural strength, and can prevent the lower end of the surge arrester from being connected to the guide ring 3 and the outgoing end bracket again.

[0024] When surge arrester 2 falls, it will be stopped by the anti-fall movable plate 7 under the force of the torsion spring 9 to prevent it from falling. When the surge arrester is replaced with a special replacement tool, the anti-fall movable plate 7 will be pushed open, and the force on the tool when used while standing on the ground will be biased towards the ground. Figure 1 The surge arrester is on the right side, while the fall arrestor is attached. Figure 1 The left side of the surge arrester avoids interference with the replacement of the surge arrester, making the replacement operation simpler.

[0025] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A fall protection mechanism for a lightning protection fuse device, characterized in that, Includes a guide ring (3) connected to the outlet bracket (1), a fall-prevention fixing ring (4) nested on the guide ring (3), a fall-prevention fixing plate (5) provided on the outside of the fall-prevention fixing ring (4), the guide ring (3), the fall-prevention fixing ring (4) and the fall-prevention fixing plate (5) are fixedly connected by bolts (6), the fall-prevention fixing plate (5) is fitted to the guide ring (3); an elastic fall-prevention component is provided at the bottom end of the fall-prevention fixing plate (5).

2. The fall protection mechanism of a lightning protection fuse device as described in claim 1, characterized in that, The elastic fall arrestor assembly includes a fall arrestor movable plate (7), and the bottom end of the fall arrestor fixed plate (5) is rotatably connected to the fall arrestor movable plate (7) by a rivet (8). A torsion spring (9) is sleeved on the rivet (8), one end of the torsion spring (9) is connected to the fall arrestor fixed plate (5), and the other end is connected to the fall arrestor movable plate (7).

3. The fall protection mechanism of a lightning protection fuse device as described in claim 2, characterized in that, Both the anti-fall fixed plate (5) and the anti-fall movable plate (7) are made of SMC material.

4. The fall protection mechanism of a lightning protection fuse device as described in claim 1, characterized in that, The guide ring (3) is threadedly connected to the outlet bracket (1).

Images