Totally-enclosed 10kV outdoor zinc oxide arrester with joint

Abstract

The utility model relates to the technical field of lightning arresters, in particular to a totally-enclosed 10kV outdoor zinc oxide lightning arrester with a joint, which comprises a rod body, a transformer arranged on the rod body, a fuse electrically connected with the transformer and a lightning arrester electrically connected with the fuse, the lightning arrester comprises a silicon rubber umbrella skirt, a wiring hole formed in the silicon rubber umbrella skirt, a valve plate arranged in the silicon rubber umbrella skirt and a zinc oxide layer arranged on the valve plate, and the zinc oxide layer is arranged on the outer side of the valve plate in a sleeving mode. According to the utility model, the series discharge gap of the traditional lightning arrester is effectively replaced, the discharge and recovery functions are realized by using the nonlinear volt-ampere characteristic of the zinc oxide valve plate, the structure is compact, the design is reasonable, and the working performance of the lightning arrester is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lightning arrester technical field especially relates to a joint full -enclosed 10kV outdoor zinc oxide lightning arrester. BACKGROUND

[0002] Lightning arrester is a kind of overvoltage protector, main function is to limit the harm caused to electrical equipment by lightning or power system overvoltage operation, when lightning or power system overvoltage operation, lightning arrester will quickly start discharge mechanism, current is introduced into earth through special conductor, so as to protect electrical equipment from being damaged, protect electrical equipment from the adverse effects of transient overvoltage, control voltage in the range of safe use, ensure the safety performance of electrical equipment insulation.The traditional silicon carbide lightning arrester is in series by silicon carbide valve sheet and discharge gap, needs to pass through gap discharge to cut off power frequency follow current, under normal voltage, there is larger leakage current due to the incomplete insulation of gap, is not conducive to long-term operation, and also causes structure to be more complex, increase the structural size of lightning arrester, thereby greatly influence the working performance of lightning arrester. SUMMARY

[0003] The utility model discloses a kind of joint full -enclosed 10kV outdoor zinc oxide lightning arrester, effectively replace the series discharge gap of traditional lightning arrester, realize the function of discharge and recovery using the non-linear volt-ampere characteristic of zinc oxide valve sheet, compact structure and reasonable in design, improve the working performance of lightning arrester.

[0004] To achieve the above object, a kind of joint full -enclosed 10kV outdoor zinc oxide lightning arrester of the utility model, including pole body, the transformer of being arranged in pole body, the fuse of being electrically connected with transformer and the lightning arrester of being electrically connected with fuse, the lightning arrester includes silicon rubber umbrella skirt, the wiring hole of being arranged in silicon rubber umbrella skirt, the valve sheet of being arranged in the inside of silicon rubber umbrella skirt and the zinc oxide layer of being arranged in valve sheet, the zinc oxide layer is set on the outside of valve sheet.

[0005] Preferably, one side of the pole body is provided with an assembly frame, one end of the assembly frame close to the lightning arrester is provided with an assembly screw, the assembly screw passes through the assembly frame and is threadedly connected with the lightning arrester, a reinforcing plate is arranged between the assembly frame and the pole body, the reinforcing plate is in an L-shaped structure, a first mounting screw is arranged at the connection between the reinforcing plate and the assembly frame, and a second mounting screw is arranged at the connection between the reinforcing plate and the pole body.

[0006] Preferably, the other side of the pole body is provided with a ceramic insulator, and the ceramic insulator is used for winding and placing the external electric wire.

[0007] Preferably, the rod body is provided with a hollow ring seat, the hollow ring seat is sleeved on the outside of the rod body, the top wall of the hollow ring seat abuts against the bottom wall of the transformer, and a fastening bolt is provided between the hollow ring seat and the rod body.

[0008] Preferably, the transformer has heat dissipation grooves on its outer side.

[0009] The beneficial effects of this utility model are: it effectively replaces the series discharge gap of traditional surge arresters, utilizes the nonlinear volt-ampere characteristics of zinc oxide varistors to achieve current discharge and recovery functions, has a compact structure and reasonable design, and improves the working performance of surge arresters. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 for Figure 1 A magnified schematic diagram of part A in the diagram.

[0012] Figure 3 for Figure 1 A magnified schematic diagram of part B.

[0013] The reference numerals in the figures include:

[0014] 1—Bar

[0015] 2—Transformer 21—Heat Dissipation Tank

[0016] 3 - Fuse

[0017] 4—Surge arrester; 41—Silicone rubber skirt; 42—Wiring hole

[0018] 43 — Valve plate 44 — Zinc oxide layer

[0019] 5 — Assembly frame 51 — Assembly screws 52 — Reinforcing plate

[0020] 53 – First mounting screw; 54 – Second mounting screw

[0021] 6—Ceramic insulators

[0022] 7—Hollow ring seat; 71—Fastening bolt. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings.

[0024] like Figures 1 to 3As shown, this utility model discloses a fully enclosed 10kV outdoor zinc oxide surge arrester with a joint, comprising a pole body 1, a transformer 2 installed on the pole body 1, a fuse 3 electrically connected to the transformer 2, and a surge arrester 4 electrically connected to the fuse 3. The surge arrester 4 includes a silicone rubber skirt 41, a wiring hole 42 installed in the silicone rubber skirt 41, a valve plate 43 installed inside the silicone rubber skirt 41, and a zinc oxide layer 44 installed in the valve plate 43. The zinc oxide layer 44 is sleeved on the outside of the valve plate 43.

[0025] The pole 1 is vertically set on the ground, and the transformer 2 is sleeved and fixed on the pole 1. The transformer 2 is electrically connected to the fuse 3, and the fuse 3 is electrically connected to the surge arrester 4. The fuse 3 is preferably a 10kV drop-out fuse. The fuse 3 is connected in series in the circuit. When the current exceeds the rated value, such as in the event of a short circuit or severe overload, the fuse element heats up and melts to cut off the circuit and protect the transformer 2 and the power grid. The silicone rubber shed 41 is connected to the wire through the wiring hole 42. The zinc oxide layer 44 is sleeved on the outside of the valve plate 43 to form the zinc oxide valve plate 43, and the zinc oxide valve plate 43 is located inside the silicone rubber shed 41. This zinc oxide valve plate 43 has excellent nonlinear voltage-current characteristics. After being molded by the silicone rubber shed 41, under the working voltage, the zinc oxide valve plate 43 is an insulator and can only carry tens of microamps of current. However, under overvoltage, it is a good conductor. The fuse 3 and the surge arrester 4 are connected together to form an overvoltage protection device. When the power system is subjected to lightning overvoltage caused by lightning or by the switch... When an operational overvoltage occurs, surge arrester 4 immediately activates and discharges. Utilizing the excellent nonlinear volt-ampere characteristics of zinc oxide, it performs current discharge and interruption functions. This ensures that the current flowing through surge arrester 4 is extremely small under normal operating voltage, reaching the microamp or milliamp level. When an overvoltage occurs, the resistance drops sharply, dissipating the overvoltage energy and achieving a protective effect. This diverts the lightning current to the ground, limiting the overvoltage amplitude on electrical equipment and preventing damage or breakdown of the equipment's insulation. The silicone rubber skirt 41, made of silicone rubber and other composite materials, is umbrella-shaped to increase the creepage distance and exhibits good withstand voltage and mechanical stress performance. This invention effectively replaces the series discharge gap of traditional surge arrester 4, utilizing the nonlinear volt-ampere characteristics of zinc oxide varistor 43 to achieve current discharge and recovery functions. It has a compact structure and reasonable design, improving the operating performance of surge arrester 4.

[0026] In this embodiment, an assembly frame 5 is provided on one side of the pole body 1. An assembly screw 51 is provided at the end of the assembly frame 5 near the surge arrester 4. The assembly screw 51 passes through the assembly frame 5 and is threadedly connected to the surge arrester 4. A reinforcing plate 52 with an L-shaped structure is provided between the assembly frame 5 and the pole body 1. A first mounting screw 53 is provided at the connection between the reinforcing plate 52 and the assembly frame 5, and a second mounting screw 54 is provided at the connection between the reinforcing plate 52 and the pole body 1. Specifically, the assembly screw 51 passes through the assembly frame 5 and is threadedly connected to the surge arrester 4, thereby fixing the surge arrester 4 to one end of the assembly frame 5. The L-shaped reinforcing plate 52 is tightly pressed against the bottom wall of the assembly frame 5 and the outer wall of the pole body 1. The first mounting screw 53 passes through the reinforcing plate 52 and is connected and fixed to the assembly frame 5, and the second mounting screw 54 passes through the reinforcing plate 52 and is connected and fixed to the pole body 1, effectively enhancing the structural strength and load-bearing stability of the assembly frame 5.

[0027] In this embodiment, a ceramic insulator 6 is provided on the other side of the pole body 1. The ceramic insulator 6 is used for placing external wires. Specifically, the ceramic insulator 6 is located on the other side of the pole body 1 and is used for placing external wires. The insulator is made of ceramic material, which has excellent insulation properties and can effectively prevent electrical breakdown and flashover. It is especially suitable for 35kV to 750kV high-voltage transmission systems. The enamel covering its surface further enhances waterproofness and surface smoothness, improves mechanical strength while maintaining electrical stability. The ceramic insulator 6 has a wave-shaped structure design, which can increase the creepage distance and block the formation of electric arcs.

[0028] In this embodiment, the rod 1 is provided with a hollow ring seat 7, which is sleeved on the outside of the rod 1. The top wall of the hollow ring seat 7 abuts against the bottom wall of the transformer 2, and a fastening bolt 71 is provided between the hollow ring seat 7 and the rod 1. Specifically, the hollow ring seat 7, which has a hollow internal structure, is sleeved on the outside of the rod 1. The top wall of the hollow ring seat 7 fits against the bottom wall of the transformer 2, and a fastening bolt 71 connects the hollow ring seat 7 and the rod 1, thereby effectively fixing the position of the hollow ring seat 7 on the rod 1 and ensuring the placement of the transformer 2.

[0029] In this embodiment, the transformer 2 is provided with a heat dissipation groove 21 on its outer side. Specifically, the heat dissipation groove 21 is designed in the form of strips, waves, or fins, which significantly increases the airflow. Through heat conduction and convection, the internal heat of the transformer 2 is quickly transferred to the external environment, improving heat dissipation efficiency. The heat dissipation groove 21 effectively controls the temperature to avoid aging of the insulation material due to insufficient heat dissipation and the risk of fire caused by high temperature.

[0030] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A jointed full enclosed 10 kV outdoor zinc oxide surge arrester, characterized in that: The utility model relates to a pole body, transformer, fuse and lightning arrester, the lightning arrester includes silicon rubber umbrella skirt, wiring hole, valve piece and zinc oxide layer, the zinc oxide layer is set up in the inside of silicon rubber umbrella skirt, the zinc oxide layer is set up in the valve piece, is set up in the valve piece and is set up in the wiring hole of silicon rubber umbrella skirt, the zinc oxide layer is set on the outside of valve piece.

2. A jointed full enclosed 10 kV outdoor zinc oxide surge arrester according to claim 1, characterized in that: One side of the pole body is provided with an assembly frame, one end of the assembly frame near the lightning arrester is provided with an assembly screw, the assembly screw passes through the assembly frame and is screwed with the lightning arrester, a reinforcing plate is arranged between the assembly frame and the pole body, the reinforcing plate is in L-shaped structure, a first mounting screw is arranged at the connecting part between the reinforcing plate and the assembly frame, and a second mounting screw is arranged at the connecting part between the reinforcing plate and the pole body.

3. A jointed full enclosed 10 kV outdoor zinc oxide surge arrester according to claim 2, characterized in that: The other side of the pole body is provided with a ceramic insulator for winding the external wire.

4. A jointed full enclosed 10 kV outdoor zinc oxide surge arrester according to claim 1, characterized in that: The pole body is provided with a hollow ring seat, the hollow ring seat is sleeved on the outside of the pole body, the top wall of the hollow ring seat abuts against the bottom wall of the transformer, and a fastening bolt is arranged between the hollow ring seat and the pole body.

5. A jointed full enclosed 10 kV outdoor zinc oxide surge arrester according to claim 1, characterized in that: The outer side of the transformer is provided with a heat dissipation groove.

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