A lightning arrester

Abstract

The utility model relates to the technical field of power equipment, and in particular to a lightning arrester. It includes a support sleeve, at least one resistor is arranged in the support sleeve, and an end cap inserted into the end of the support sleeve and connected to the resistor, multiple plug holes are arranged at both ends of the support sleeve, and multiple slots corresponding to the plug holes are arranged on the outer circumference of the end cap, and the plug plate is inserted into the plug hole and the slot at the same time, and the ring is sleeved on the outside of the part of the support sleeve where the plug hole is arranged, and also includes an insulating shell injection molded outside the outer circumference of the support sleeve, the ring and the end cap, and the end cap is provided with a threaded hole on the side away from the resistor. The support sleeve and the end cap of the utility model have a high bonding force.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a lightning arrester. Background Art

[0002] Lightning arrester is an electrical device used to protect electrical equipment from high transient overvoltage hazards during lightning strikes, and to limit the follow-on time and often the follow-on amplitude. Lightning arrester is sometimes also called overvoltage protector or overvoltage limiter. Among them, gapless metal oxide arrester (also called varistor arrester) is a new type of arrester that began to appear in the 1970s. It has a zinc oxide (ZnO) resistor inside, which has excellent nonlinear volt-ampere characteristics. Under power frequency voltage, it presents a very large resistance, effectively suppressing power frequency current, and under lightning wave overvoltage, it presents a very small resistance, which can discharge lightning current well.

[0003] The patent with application number 202111465209.1 discloses a direct-molded composite sheath lightning arrester and a manufacturing method. The direct-molded composite sheath lightning arrester includes a pressure-resistant support, a resistor core and a silicone rubber umbrella. The pressure-resistant support is a cylindrical component with hollow areas on its outer circumference. The resistor core is assembled between the two ends of the inner cavity of the pressure-resistant support, and one end is the high-voltage end and the other end is the low-voltage end. The silicone rubber umbrella is wrapped around the outside of the pressure-resistant support and contacts the resistor core through the hollow area of ​​the pressure-resistant support. However, the bonding force between the pressure-resistant support and the electrode is low. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a lightning arrester in view of the above-mentioned technical deficiencies.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a lightning arrester, including a supporting sleeve, at least one resistor is arranged in the supporting sleeve, and also includes an end cap inserted into the end of the supporting sleeve and conductive with the resistor, a plurality of jacks are arranged at both ends of the supporting sleeve, a plurality of slots corresponding to the jacks are arranged on the outer circumference of the end cap, the plug plate is inserted into the jack and the slots at the same time, the ring is sleeved on the outside of the part of the supporting sleeve where the jack is arranged, and also includes an insulating shell injection molded outside the outer circumference of the supporting sleeve, the ring and the end cap, and a threaded hole is arranged on the side of the end cap away from the resistor.

[0006] Furthermore, the material of the resistor is zinc oxide.

[0007] Furthermore, a gasket is provided on a side of the end cap close to the resistor.

[0008] Furthermore, the front end of the plug board close to the resistor sheet is an inclined surface.

[0009] Compared with the prior art, the utility model has the following advantages: a plurality of insertion holes are provided at both ends of the support sleeve, a plurality of slots are provided on the outer circumference of the end cap, and the end cap can be fixed on the support sleeve by inserting the insertion plate into the insertion holes and the slots at the same time, and the collar can prevent the insertion plate from falling outward, so that the bonding force between the support sleeve and the end cap is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A schematic diagram of the structure of a lightning arrester.

[0011] Figure 2 for Figure 1 Magnified view of point I in the middle.

[0012] Figure 3 Schematic diagram of the structure of the end cap.

[0013] Figure 4 A schematic diagram of the structure of the supporting casing.

[0014] In the figure: 1, end cap; 11, threaded hole; 12, slot; 2, insulating shell; 3, ring; 4, plug-in plate; 5, supporting sleeve; 51, jack; 6, resistor; 7, gasket. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0016] Specific implementation method: Combination Figure 1-4 As shown, a lightning arrester includes a support sleeve 5, the support sleeve 5 is made of insulating material and has high strength, and can be made of epoxy resin reinforced with glass fibers, at least one resistor 6 is arranged in the support sleeve 5, and also includes an end cap 1 inserted into the end of the support sleeve 5 and connected to the resistor 6, the end cap 1 is a good conductor of electricity, and its material can be aluminum or steel, a plurality of jacks 51 are arranged at both ends of the support sleeve 5, and a plurality of slots 12 corresponding to the jacks 51 are arranged on the outer circumference of the end cap 1, and the plug board 4 is inserted into the insertion hole 51 and the slot 12 at the same time, so that the end cap 1 can be fixed on the support sleeve 5, the collar 3 is sleeved on the outside of the part of the support sleeve 5 where the insertion hole 51 is provided, the collar 3 can be made of a material with high strength such as steel, which can prevent the plug board 4 from falling out, and also includes an insulating shell 2 injection molded outside the outer circumference of the support sleeve 5, the collar 3 and the end cap 1, the insulating shell 2 is preferably made of silicone rubber, and the end cap 1 is provided with a threaded hole 11 on the side away from the resistor 6 for connecting a bolt as an electrode.

[0017] Specifically, the resistor 6 is made of zinc oxide.

[0018] Preferably, a gasket 7 is provided on one side of the end cap 1 close to the resistor 6. The gasket 7 is a good electrical conductor, and the resistors 6 can be closely fitted together by selecting a gasket 7 with a suitable thickness.

[0019] Preferably, the front end of the plug board 4 close to the resistor 6 is an inclined surface, so that when the plug board 4 is inserted into the slot 12 , the end cap 1 can press the gasket 7 inwardly and thus the resistor 6 .

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lightning arrester, comprising a support sleeve (5), wherein at least one resistor (6) is arranged in the support sleeve (5), and further comprising an end cap (1) inserted into the end of the support sleeve (5) and conductively connected to the resistor (6), characterized in that: The supporting sleeve (5) is provided with a plurality of insertion holes (51) at both ends, the outer circumference of the end cap (1) is provided with a plurality of slots (12) corresponding to the insertion holes (51), the plug plate (4) is inserted into the insertion holes (51) and the slots (12) at the same time, the collar (3) is sleeved on the outside of the portion of the supporting sleeve (5) where the insertion holes (51) are provided, and further comprises an insulating shell (2) injection-molded on the outer circumference of the supporting sleeve (5), the collar (3) and the end cap (1), and a threaded hole (11) is provided on the side of the end cap (1) away from the resistor (6).

2. A lightning arrester according to claim 1, characterized in that: The material of the resistor (6) is zinc oxide.

3. A lightning arrester according to claim 1, characterized in that: A gasket (7) is provided on one side of the end cap (1) close to the resistor sheet (6).

4. A lightning arrester according to any one of claims 1 to 3, characterized in that: The front end of the plug board (4) close to the resistor sheet (6) is an inclined surface.

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