Lightning arrester with insulating sleeve

Abstract

The utility model belongs to the technical field of power system protection, and particularly relates to an overvoltage protection technology of electrical equipment. The utility model provides a lightning arrester with an insulating sleeve. The lightning arrester comprises a mounting plate, a pair of oppositely arranged clamping mechanisms, a lightning arrester body and the insulating sleeve, a limiting hole is formed in the center of the mounting plate in the vertical direction. The pair of clamping mechanisms is installed on the installation plate and used for clamping the lightning arrester body. The lightning arrester body is vertically mounted on the mounting plate, and the lower end of the lightning arrester body is inserted into a limiting hole in the mounting plate. And a group of core bodies are arranged in the lightning arrester body along the vertical direction. The insulation sleeve wraps the lightning arrester body. The insulating sleeve comprises a group of insulating umbrella skirts. The insulating umbrella skirts are arranged outwards in the radial direction of the lightning arrester body, and the thicknesses of the insulating umbrella skirts are gradually reduced outwards from the center of the lightning arrester body. According to the lightning arrester with the insulating sleeve, provided by the utility model, the installation convenience, the maintenance convenience and the environmental adaptability of the device are enhanced while the electrical performance and the mechanical stability are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of power system protection, and particularly relates to the overvoltage protection technology of electrical equipment. Background Art

[0002] The utility model patent with the publication number of CN220822597U discloses a power arrester, which includes a base, a fixing structure and an arrester. The arrester is installed on the base through the fixing structure. The number of the fixing structures is not less than four, and the fixing structures are evenly distributed in a ring between the arrester and the base; the ear plate is installed on the arrester, and the U-shaped groove is opened on the ear plate. Place the arrester on the base, put the U-shaped groove on the ear plate over the corresponding bolt, screw the nut on the bolt, so that the arrester is installed on the base. Then put the ring over the bolt, align the through hole with the transverse hole, insert the threaded rod into the through hole and the transverse hole, and screw the nut on the threaded rod to fix the ring on the bolt, double-fixing the arrester to make its installation more stable; the elastic member enhances the elasticity of the clamping block, and the clamping block is clamped into the clamping groove, which is convenient for installing the protective cover on the arrester. However, the fixing method of the power arrester by strengthening the base, the fixing structure, the ear plate, the U-shaped groove, the bolt, the nut, the threaded rod and the nut has complicated installation steps, requires multiple steps and various tools, and has insufficient sealing performance, is easily affected by the environment, and affects the electrical performance and mechanical stability. Summary of the Invention

[0003] The utility model overcomes the deficiencies of the prior art and provides an arrester with an insulating sleeve, which enhances the installation convenience, maintenance simplicity and environmental adaptability of the device while ensuring the electrical performance and mechanical stability.

[0004] To achieve the above object, the technical solution adopted by the utility model is: an arrester with an insulating sleeve, which is characterized in that it includes a mounting plate, a pair of oppositely arranged clamping mechanisms, an arrester body and an insulating sleeve.

[0005] A limiting hole is arranged vertically in the center of the mounting plate.

[0006] A pair of clamping mechanisms are installed on the mounting plate to clamp the arrester body.

[0007] The arrester body is vertically installed on the mounting plate, and the lower end of the arrester body is inserted into the limiting hole located on the mounting plate. A group of core bodies are installed vertically in the arrester body.

[0008] The insulating sleeve wraps the arrester body. The insulating sleeve includes a group of insulating umbrella skirts. The insulating umbrella skirts are arranged radially outward along the arrester body, and their thickness gradually decreases from the center of the arrester body to the outside.

[0009] In a preferred embodiment of the present utility model, a pair of clamping mechanisms are respectively arranged on both sides of the mounting plate along the length direction of the mounting plate. Each clamping mechanism includes a fixed block, a clamping plate and an adjusting screw. The fixed block is installed on one side edge of the mounting plate, and a positioning hole is arranged on the fixed block along the length direction parallel to the mounting plate. The clamping plate is slidably arranged on the mounting plate, and one end of the clamping plate close to the arrester body has an arc structure for clamping the arrester body. The adjusting screw passes through the positioning hole, and the end of the adjusting screw abuts against the clamping plate.

[0010] In a preferred embodiment of the present utility model, a set of limiting grooves are arranged on the mounting plate along the length direction of the mounting plate. A slider is slidably installed in each limiting groove, the cross-section of the slider matches the cross-section of the limiting groove, the slider slides along the limiting groove, and the slider is fixedly connected with the clamping plate.

[0011] In a preferred embodiment of the present utility model, the cross-sections of the limiting grooves and the sliders are both trapezoidal.

[0012] In a preferred embodiment of the present utility model, a set of limiting frames are arranged on the mounting plate, and the cross-section of each limiting frame matches the cross-section of the clamping plate.

[0013] In a preferred embodiment of the present utility model, the insulating umbrella skirt includes a first insulating umbrella skirt and a second insulating umbrella skirt. The first insulating umbrella skirt and the second insulating umbrella skirt are arranged alternately, and the thickness of the first insulating umbrella skirt is less than that of the second insulating umbrella skirt.

[0014] In a preferred embodiment of the present utility model, a chamfer is arranged on the outer edge of each insulating umbrella skirt.

[0015] In a preferred embodiment of the present utility model, a set of stress release grooves are arranged on the insulating sleeve along the circumferential direction of the insulating sleeve.

[0016] In a preferred embodiment of the present utility model, a sealing ring is arranged on the insulating sleeve.

[0017] In a preferred embodiment of the present utility model, the sealing ring includes a protective ring and a buffer ring. The protective ring is made of wear-resistant material, the buffer ring is made of elastic material, and the buffer ring is fixed to the protective ring through an adhesive.

[0018] The present utility model solves the defects existing in the background technology, and the present utility model has the following beneficial effects:

[0019] (1) For the arrester with an insulating sleeve provided by the present utility model, through the positioning holes, clamping mechanisms, limiting grooves and sliders on the mounting plate, the rapid and accurate installation of the arrester is realized. The positioning holes provide accurate installation positions for the arrester body, the clamping mechanisms quickly fix the arrester, the limiting grooves and sliders guide the movement of the clamping plate, effectively avoiding errors during the installation process, simplifying the installation steps and improving the installation efficiency.

[0020] (2) By defining the cross-sections of the limiting groove and the slider of the lightning arrester of the present utility model as trapezoidal, it effectively prevents the clamping plate from sliding off during installation, and restricts the movement range of the clamping plate through the limiting frame, avoiding damage caused by excessive movement. The arc-shaped structure of the clamping plate can effectively conform to the shape of the lightning arrester body, preventing damage to the lightning arrester during the clamping process.

[0021] (3) The insulating sleeve of the present utility model adopts insulating umbrella skirts arranged alternately, and through chamfers and stress relief grooves, it effectively reduces the electric field strength, releases stress concentration, and improves the insulation performance and mechanical strength of the lightning arrester. The sealing ring on the insulating sleeve, including a wear-resistant protective ring and an elastic buffer ring, can effectively prevent erosion from the external environment and extend the service life of the lightning arrester. Brief Description of the Drawings

[0022] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0023] Figure 1 is a schematic structural diagram of a lightning arrester with an insulating sleeve provided by the present utility model;

[0024] Figure 2 is a schematic structural diagram of the mounting plate;

[0025] Figure 3 is a schematic structural diagram of the lightning arrester body;

[0026] Figure 4 is a schematic structural diagram of the insulating sleeve;

[0027] Figure 5 is a schematic structural diagram of a partial mounting plate;

[0028] Figure 6 is a schematic structural diagram of the clamping plate;

[0029] Figure 7 is Figure 4 a schematic structural diagram of the sealing ring of the A-A cross-section in

[0030] In the figure: 1, mounting plate; 2, clamping mechanism; 3, lightning arrester body; 4, insulating sleeve; 11, limiting hole; 12, limiting groove; 13, slider; 14, limiting frame; 21, fixed block; 22, clamping plate; 23, adjusting screw; 41, insulating umbrella skirt; 42, stress relief groove; 43, sealing ring; 211, positioning hole; 411, first insulating umbrella skirt; 412, second insulating umbrella skirt; 431, protective ring; 432, buffer ring. Detailed Embodiment

[0031] The present utility model will now be further described in detail with reference to the accompanying drawings and embodiments. These drawings are all simplified schematic diagrams, only showing the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0032] As Figures 1 - 5 shown, a lightning arrester with an insulating sleeve 4 includes a mounting plate 1, a pair of oppositely arranged clamping mechanisms 2, a lightning arrester body 3, and an insulating sleeve 4.

[0033] A limiting hole 11 is provided vertically in the center of the mounting plate 1.

[0034] A pair of clamping mechanisms 2 are mounted on the mounting plate 1 for clamping the lightning arrester body 3.

[0035] The lightning arrester body 3 is vertically mounted on the mounting plate 1, and the lower end of the lightning arrester body 3 is inserted into the limiting hole 11 of the mounting plate 1. A group of cores are mounted vertically in the lightning arrester body 3.

[0036] The insulating sleeve 4 wraps the lightning arrester body 3. The insulating sleeve 4 includes a group of insulating umbrella skirts 41. The insulating umbrella skirts 41 are arranged radially outward along the lightning arrester body 3, and their thickness gradually decreases from the center of the lightning arrester body 3 outward.

[0037] The lightning arrester with an insulating sleeve provided by the present utility model enhances the installation convenience, maintenance simplicity, and environmental adaptability of the device while ensuring electrical performance and mechanical stability.

[0038] The mounting plate 1 provides a stable platform for the installation of the clamping mechanism 2 and the positioning of the lightning arrester body 3. A pair of oppositely arranged clamping mechanisms 2 are mounted on the mounting plate 1 for clamping the lightning arrester body 3, allowing the lightning arrester body 3 to be vertically fixed on the mounting plate 1, and ensuring the stable immobility of the lightning arrester body 3 during operation through the clamping force of the clamping mechanism 2. The lower end of the lightning arrester body 3 is inserted into the limiting hole 11 to ensure the vertical installation and centered positioning of the lightning arrester body 3.

[0039] The insulating sleeve 4 wraps the lightning arrester body 3 to provide necessary electrical insulation and protect the lightning arrester from the external environment. The insulating umbrella skirts 41 are arranged radially outward along the lightning arrester body 3 to form a multi-layer insulation structure. By gradually decreasing the thickness of the insulating umbrella skirts 41 from the center outward, a gradient distribution of the electric field intensity can be achieved, reducing electric field concentration and the risk of partial discharge. The multi-layer insulating umbrella skirts 41 can provide more creepage distance, effectively preventing surface discharge and improving the insulation level of the lightning arrester.

[0040] As Figure 1 、 Figure 2As shown in the figure, a pair of clamping mechanisms 2 are respectively arranged on both sides of the mounting plate 1 along the length direction of the mounting plate 1. Each clamping mechanism 2 includes a fixed block 21, a clamping plate 22 and an adjusting screw 23. The fixed block 21 is installed on one side edge of the mounting plate 1, and a positioning hole 211 is arranged on the fixed block 21 along the length direction parallel to the mounting plate 1. The clamping plate 22 is slidably arranged on the mounting plate 1, and one end of the clamping plate 22 close to the arrester body 3 has an arc structure for clamping the arrester body 3. The adjusting screw 23 is inserted into the positioning hole 211, and the end of the adjusting screw 23 abuts against the clamping plate 22. A pair of clamping mechanisms 2 are arranged on both sides of the mounting plate 1 along the length direction of the mounting plate 1 to form a symmetrical layout for evenly clamping the arrester body 3. One end of the clamping plate 22 close to the arrester body 3 has an arc structure, which helps to match the shape of the arrester body 3 and achieve tight clamping. The adjusting screw 23 is inserted into the positioning hole 211 and connected to the clamping plate 22. By rotating the adjusting screw 23, the clamping plate 22 is pushed to slide on the mounting plate 1 to clamp or loosen the arrester body 3.

[0041] As Figure 5 , Figure 6 shown, a set of limiting grooves 12 are arranged on the mounting plate 1 along the length direction of the mounting plate 1. A slider 13 is slidably installed in each limiting groove 12. The cross section of the slider 13 matches the cross section of the limiting groove 12. The slider 13 slides along the limiting groove 12, and the slider 13 is fixedly connected to the clamping plate 22. The slider 13 is slidably installed in the limiting groove 12, and the cross section of the slider 13 matches the cross section of the limiting groove 12, ensuring the smooth movement of the slider 13 in the limiting groove 12. The slider 13 is fixedly connected to the clamping plate 22. When the slider 13 moves in the limiting groove 12, the clamping plate 22 moves along the length direction of the mounting plate 1 with the slider 13. The limiting groove 12 provides a moving path and direction for the slider 13, ensuring that the slider 13 and the clamping plate 22 do not deviate from the predetermined track.

[0042] As Figure 5 , Figure 6 shown, the cross sections of both the limiting groove 12 and the slider 13 are trapezoidal, allowing the slider 13 to move parallel to the longer side of the trapezoid, preventing the slider 13 from derailing in the limiting groove 12, and ensuring the stable sliding of the clamping plate 22 along the length direction of the mounting plate 1.

[0043] As Figure 2 shown, a set of limiting frames 14 are arranged on the mounting plate 1. The cross section of each limiting frame 14 matches the cross section of the clamping plate 22. The clamping plate 22 slides in the limiting frame 14 along a specific direction, thus ensuring that the clamping plate 22 does not deviate from the predetermined path during the adjustment process.

[0044] As Figure 4As shown, the insulating umbrella skirt 41 includes a first insulating umbrella skirt 411 and a second insulating umbrella skirt 412. The first insulating umbrella skirt 411 and the second insulating umbrella skirt 412 are arranged alternately, and the thickness of the first insulating umbrella skirt 411 is less than that of the second insulating umbrella skirt 412. Due to its larger thickness, the second insulating umbrella skirt 412 can withstand a higher electric field strength, while the first insulating umbrella skirt 411 provides insulation in areas with a lower electric field strength. By arranging insulating umbrella skirts 41 with different thicknesses alternately, the lightning arrester improves the uniformity of the electric field distribution while maintaining its insulation performance, reduces the risk of partial discharge, and has good economy and environmental adaptability.

[0045] As Figure 4 shown, a chamfer is provided at the outer edge of each insulating umbrella skirt 41. The chamfer can guide rainwater to flow along the surface of the insulating umbrella skirt 41, reduce the accumulation of rainwater at the edge of the umbrella skirt, lower the risk of flashover caused by the accumulation of rainwater, and improve the reliability of the long-term operation of the lightning arrester in bad weather.

[0046] As Figure 4 shown, a set of stress relief grooves 42 are provided on the insulating sleeve 4 along the circumferential direction of the insulating sleeve 4. The stress relief grooves 42 provide a path for stress concentration release, reduce the local stress inside the material of the insulating sleeve 4, and while improving the mechanical strength and insulation performance of the lightning arrester, ensure its long-term stable operation.

[0047] As Figure 4 shown, a sealing ring is provided on the insulating sleeve 4. The sealing ring can effectively prevent moisture, salt spray, and other pollutants from entering the inside of the insulating sleeve 4, protect the core body from the influence of moisture and pollution, and help the lightning arrester maintain stable and safe performance during long-term operation.

[0048] As Figure 4 and Figure 5 shown, the sealing ring includes a protective ring 431 and a buffer ring 432. The protective ring 431 is made of wear-resistant material, and the buffer ring 432 is made of elastic material. The buffer ring 432 is fixed to the protective ring 431 by an adhesive. The protective ring 431 of the sealing ring is made of wear-resistant material, which improves the ability of the sealing ring to resist mechanical wear and extends its service life. The buffer ring 432 has elasticity and can adapt to the dimensional changes caused by temperature changes to maintain the sealing effect.

[0049] Based on the ideal embodiments of the present utility model as an inspiration, through the above description, relevant personnel can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A lightning arrester with an insulating sleeve, characterized in that: It comprises a mounting plate (1), a pair of clamping mechanisms (2) arranged opposite to each other, a lightning arrester body (3) and an insulating sleeve (4); A limiting hole (11) is provided in the center of the mounting plate (1) along the vertical direction; The pair of clamping mechanisms (2) are mounted on the mounting plate (1) and are used to clamp the arrester body (3); The arrester body (3) is vertically mounted on the mounting plate (1), and the lower end of the arrester body (3) is inserted into a limiting hole (11) located on the mounting plate (1); a group of core bodies are mounted in the arrester body (3) in a vertical direction; The insulating sleeve (4) wraps the arrester body (3); the insulating sleeve (4) comprises a group of insulating sheds (41); the insulating sheds (41) are arranged radially outwardly along the arrester body (3), and the thickness thereof gradually decreases from the center of the arrester body (3) toward the outside.

2. The lightning arrester with an insulating sleeve according to claim 1, characterized in that: The pair of clamping mechanisms (2) are respectively arranged on both sides of the mounting plate (1) along the length direction of the mounting plate (1); each of the clamping mechanisms (2) comprises a fixing block (21), a clamping plate (22) and an adjusting screw (23); the fixing block (21) is mounted on an edge of one side of the mounting plate (1), and a positioning hole (211) is arranged on the fixing block (21) along a direction parallel to the length direction of the mounting plate (1); the clamping plate (22) is slidably arranged on the mounting plate (1), and one end of the clamping plate (22) close to the arrester body (3) has an arc structure for clamping the arrester body (3); the adjusting screw (23) is inserted into the positioning hole (211), and the end of the adjusting screw (23) abuts against the clamping plate (22).

3. The lightning arrester with an insulating sleeve according to claim 2, characterized in that: A group of limiting grooves (12) are provided on the mounting plate (1) along the length direction of the mounting plate (1); a sliding block (13) is slidably installed in each limiting groove (12); the cross section of the sliding block (13) matches the cross section of the limiting groove (12); the sliding block (13) slides along the limiting groove (12); and the sliding block (13) is fixedly connected to the clamping plate (22).

4. The arrester with an insulating sleeve according to claim 3, characterized in that: The cross-sections of the limiting groove (12) and the sliding block (13) are both trapezoidal.

5. The arrester with an insulating sleeve according to claim 3, characterized in that: A group of limiting frames (14) are arranged on the mounting plate (1), and the cross section of each limiting frame (14) matches the cross section of the clamping plate (22).

6. The lightning arrester with an insulating sleeve according to claim 1, characterized in that: The insulating shed (41) comprises a first insulating shed (411) and a second insulating shed (412); the first insulating shed (411) and the second insulating shed (412) are arranged alternately, and the thickness of the first insulating shed (411) is smaller than that of the second insulating shed (412).

7. The arrester with an insulating sleeve according to claim 1, characterized in that: The outer edge of each insulating shed (41) is provided with a chamfer.

8. The arrester with an insulating sleeve according to claim 1, characterized in that: The insulating sleeve (4) has a group of stress release grooves (42) arranged along the circumference of the insulating sleeve (4).

9. The lightning arrester with an insulating sleeve according to claim 1, characterized in that: A sealing ring (43) is provided on the insulating sleeve (4).

10. The lightning arrester with an insulating sleeve according to claim 9, characterized in that: The sealing ring (43) comprises a protective ring (431) and a buffer ring (432); the protective ring (431) is made of a wear-resistant material, the buffer ring (432) is made of an elastic material, and the buffer ring (432) and the protective ring (431) are fixed by an adhesive.

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