Three-phase common-tank lightning arrester switching structure

Abstract

The utility model provides a three-phase common-tank lightning arrester switching structure, which comprises a base, a tank body fixedly mounted at the top of the base, a high-voltage end insulator fixedly mounted at the top of the tank body, guide rods fixed at the top of the base in an array manner, a sliding seat connected to the guide rods in a sliding manner, and three core bodies fixed on the sliding seat in an array manner, three low-voltage end insulators are arranged on the base in an array mode, three high-voltage end shielding seats are arranged at the bottoms of the high-voltage end insulators in an array mode, the core body is electrically connected with the low-voltage end insulators, and the top end of the core body is connected with the high-voltage end shielding seats in a matched and inserted mode; a lifting driving part is arranged at the center of the sliding seat, a limiting assembly is arranged between the sliding seat and the guide rod, and a sealing box is fixedly installed on the outer wall of the tank body. The utility model has the advantages of convenient operation, small size, and automatic spacing when the core body and the high-voltage end shielding seat are connected.

Description

Technical Field

[0001] This utility model relates to the field of surge arresters, and in particular to a switching structure for a three-phase common-tank surge arrester. Background Technology

[0002] Metal-cased surge arresters are essential components of GIS (Gas Insulation System). Typically, they are installed on the transformer end of the GIS busbar and GIS conduit where the transformer is directly connected. Electrically, metal-cased surge arresters are identical to porcelain-cased surge arresters. Their structure consists of a zinc oxide resistive element core housed within a sealed metal cylinder filled with SF6 insulating gas.

[0003] Chinese Patent CN218918550U, filed on November 28, 2022, discloses a GIS surge arrester, comprising: an arrester body including a tank and an arrester core disposed within the tank, and a stationary contact electrically connected to the arrester core; a mechanism housing disposed on the lower side of the arrester body; a moving contact slidably disposed within the mechanism housing, with its open end extending into the tank and used for electrical connection with the stationary contact; and a drive device, the drive part of which is disposed outside the mechanism housing, and the transmission part of which is disposed inside the mechanism housing, to drive the moving contact to achieve the opening and closing action with the stationary contact. This invention allows for electrical connection or disconnection of the GIS surge arrester and the GIS combined electrical system simply by operating the drive part, without removing the GIS surge arrester or connecting conductors. This invention features a compact structure, convenient operation, high efficiency, low cost, and reliable sealing.

[0004] In this technical solution, the moving contact is moved up and down by the operating handle, the first connecting rod and the second connecting rod, so as to connect and separate the moving contact and the stationary contact. However, in this technical solution, a mechanism box needs to be set inside the tank, which increases the size of the surge arrester. Moreover, after long-term use, the connection between the operating handle and the mechanism box is prone to reduced sealing effect due to friction. Therefore, further improvements can be made. Summary of the Invention

[0005] In order to solve the problems existing in the background technology, this utility model proposes a three-phase common tank type surge arrester switching structure.

[0006] A three-phase common-tank surge arrester switching structure includes a base, a tank body fixedly mounted on the top of the base, a high-voltage end insulator fixedly mounted on the top of the tank body, a guide rod array fixedly mounted on the top of the base, a slide block slidably connected to the guide rod, three cores arrayed on the slide block, three low-voltage end insulators arrayed on the base, and three high-voltage end shielding seats arrayed at the bottom of the high-voltage end insulators. The cores are electrically connected to the low-voltage end insulators, and the top of the cores is adapted to be inserted into the high-voltage end shielding seats. A lifting drive component is provided at the center of the slide block, a limit component is provided between the slide block and the guide rod, and a sealed box is fixedly mounted on the outer wall of the tank body.

[0007] Based on the above, a bottom shell is fixedly installed at the bottom of the base, and three partitions are arranged in an array at the top of the base. The three partitions are welded together at one end near the axis of the tank body, and each low-voltage end insulator is located between two adjacent partitions.

[0008] Based on the above, the slide includes a lower support plate, a support tube is fixedly installed at the top center of the lower support plate, an upper support plate is fixedly installed at the top of the support tube, the core is fixedly fixed through the lower support plate and the support tube, and the lower support plate and the upper support plate are slidably connected to the guide rod.

[0009] Based on the above, the lifting drive includes a rotating shaft rotatably connected to the connection of the three partitions. The rotating shaft passes through the inside of the support tube. The upper half of the rotating shaft has a threaded groove, and the inner wall of the support tube is threaded. The rotating shaft is threaded to the support tube through the threaded groove. A first bevel gear is fixedly installed on the lower half of the rotating shaft. A second bevel gear meshes with the right side of the first bevel gear. A drive shaft is fixedly installed at the right end of the second bevel gear. The drive shaft is rotatably connected to the tank body. A support is fixedly installed on the top of the base. The drive shaft is rotatably connected to the support. A cross-shaped protrusion is fixedly installed at the right end of the drive shaft, and a turntable is sleeved on the cross-shaped protrusion.

[0010] Based on the above, the limiting component includes three sleeves fixedly arranged in an array on the lower support plate. A spring is fixedly installed on the inner wall of the sleeve, and a retaining strip is fixedly installed on the other end of the spring. The other end of the retaining strip is provided with an arc-shaped part. A V-shaped groove is opened on the upper half surface of the guide rod, and the retaining strip is inserted into the V-shaped groove. The retaining strip is attached to the surface of the guide rod through the arc-shaped part.

[0011] Based on the above, the sealed box includes a rain cover welded to the right side of the tank body. The rain cover covers the outside of the turntable. The right end of the rain cover is tilted downward. A rubber ring is fixedly installed on the right end of the rain cover. A sealing plate is fixedly installed on the right end of the rain cover by bolts. The sealing plate is attached to the rubber ring.

[0012] Based on the above, an inflation valve is provided on the right side of the tank.

[0013] This utility model has substantial features and advancements compared to existing technologies. Specifically, this utility model guides the core body through the cooperation of a guide rod and a sliding block, and drives the sliding block to rise and fall through a lifting drive component, controlling the connection and disconnection of the core body with the high-voltage shielding seat, thus making operation more convenient. Moreover, the lifting drive component is located inside the tank, which does not increase the size of the surge arrester. Furthermore, the setting of the limiting component automatically limits the connection when the core body is connected to the high-voltage shielding seat, which has the advantages of convenient operation, small size, and automatic limiting when the core body is connected to the high-voltage shielding seat. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a structural schematic diagram of the base, high-voltage end insulator, and tank body of this utility model in their separated state.

[0016] Figure 3 This is a schematic diagram of the structure of this utility model that removes the tank body and the high-voltage end insulator.

[0017] Figure 4 This is a structural schematic diagram of the guide rod, slide block and core of this utility model in their separated states.

[0018] Figure 5 This is a structural schematic diagram of the lifting drive component and the sealing box of this utility model.

[0019] Figure 6 This is a structural schematic diagram of the slide, guide rod, and limiting assembly of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 100, base; 200, tank body; 300, high-voltage end insulator; 400, guide rod; 500, slide block; 600, core; 700, lifting drive component; 800, limit assembly; 900, sealing box; 101, low-voltage end insulator; 102, bottom shell; 103, partition plate; 201, air filling valve; 301, high-voltage end shielding seat; 401, V-groove; 501, lower... 502. Support plate; 503. Upper support plate; 701. Rotating shaft; 702. Threaded groove; 703. First bevel gear; 704. Second bevel gear; 705. Drive shaft; 706. Support; 707. Cross protrusion; 708. Turntable; 801. Sleeve; 802. Spring; 803. Locking strip; 804. Arc-shaped part; 901. Rain cover; 902. Rubber ring; 903. Sealing plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1-6 As shown, a three-phase common-tank surge arrester switching structure includes a base 100, a tank 200 fixedly installed on the top of the base 100, a high-voltage end insulator 300 fixedly installed on the top of the tank 200, a guide rod 400 fixedly arranged on the top of the base 100, a slide block 500 slidably connected to the guide rod 400, three cores 600 fixedly arranged on the slide block 500, three low-voltage end insulators 101 arranged on the base 100, and three high-voltage end shielding seats 301 arranged on the bottom of the high-voltage end insulators 300. The cores 600 are electrically connected to the low-voltage end insulators 101, and the top of the cores 600 is adapted to be inserted into the high-voltage end shielding seats 301. A lifting drive component 700 is provided at the center of the slide block 500, a limit component 800 is provided between the slide block 500 and the guide rod 400, and a sealing box 900 is fixedly installed on the outer wall of the tank 200.

[0023] In use, a bottom shell 102 is fixedly installed on the bottom of the base 100, and three partitions 103 are arranged in an array on the top of the base 100. The three partitions 103 are welded together at one end near the axis of the tank body 200. Each low-voltage end insulator 101 is located between two adjacent partitions 103, thereby separating the three low-voltage end insulators 101.

[0024] In practice, the slide 500 includes a lower support plate 501, a support tube 502 fixedly installed at the top center of the lower support plate 501, and an upper support plate 503 fixedly installed at the top of the support tube 502. The support tube 502 and the upper support plate 503 can be made of insulating material. The core 600 is fixedly mounted through the lower support plate 501 and the support tube 502, so that the lower support plate 501 and the support tube 502 jointly support the core 600, making the installation of the core 600 more stable. The lower support plate 501 and the upper support plate 503 are slidably connected to the guide rod 400. The slide 500 is driven to move up and down by the lifting drive component 700, realizing the connection and separation of the core 600 and the high-voltage end shielding seat 301.

[0025] Specifically, the lifting drive component 700 includes a rotating shaft 701 rotatably connected at the connection of the three partitions 103. The rotating shaft 701 passes through the inside of the support tube 502. The upper half of the rotating shaft 701 is provided with a threaded groove 702. The inner wall of the support tube 502 is provided with threads. The rotating shaft 701 is threadedly connected to the support tube 502 through the threaded groove 702. Thus, by rotating the rotating shaft 701, the support tube 502 is driven to move up and down. In conjunction with the connection between the lower support plate 501 and the upper support plate 503, the core 600 is driven to move up and down.

[0026] A first bevel gear 703 is fixedly mounted on the lower half of the rotating shaft 701. A second bevel gear 704 meshes with the right side of the first bevel gear 703. A drive shaft 705 is fixedly mounted on the right end of the second bevel gear 704. The drive shaft 705 is rotatably connected to the tank body 200. A support 706 is fixedly mounted on the top of the base 100. The drive shaft 705 is rotatably connected to the support 706. A cross protrusion 707 is fixedly mounted on the right end of the drive shaft 705. A turntable 708 is fitted on the cross protrusion 707. A cross-shaped groove is opened on the left end of the turntable 708 corresponding to the cross protrusion 707. When it is necessary to control the connection between the core 600 and the high-voltage shield 301, hold the turntable 708 and connect it to the cross-shaped protrusion 707. Then drive the drive shaft 705 to rotate. This, combined with the transmission action of the second bevel gear 704 and the first bevel gear 703, drives the shaft 701 to rotate, thereby connecting or separating the core 600 from the high-voltage shield 301. After operation, the turntable 708 can be removed from the cross-shaped protrusion 707 and stored inside the sealed box 900. This prevents the drive shaft 705 from being accidentally triggered to rotate under normal circumstances.

[0027] The limiting assembly 800 includes three sleeves 801 fixedly arranged on the lower support plate 501. A spring 802 is fixedly installed on the inner wall of each sleeve 801, and a retaining strip 803 is fixedly installed on the other end of each spring 802. The other end of the retaining strip 803 has an arc-shaped portion 804. A V-groove 401 is formed on the upper surface of the guide rod 400, and the retaining strip 803 is inserted into the V-groove 401. The retaining strip 803 adheres to the surface of the guide rod 400 through the arc-shaped portion 804. During the sliding of the slide block 500 along the guide rod 400, the retaining strip 803, through the arc-shaped portion 804, adheres more closely to the surface of the guide rod 400, reducing friction between them. When the core 600 is connected to the high-voltage shielding seat 301, the retaining strip 803, under the elasticity of the spring 802, is inserted into the V-groove 401. This maintains the slide block 500 at its current height, keeping the core 600 connected to the high-voltage shielding seat 301.

[0028] In reality, the sealed box 900 includes a rain shield 901 welded to the right side of the tank body 200. The rain shield 901 covers the outside of the turntable 708, with its right end tilted downwards. A rubber ring 902 is fixedly installed on the right end of the rain shield 901, and a sealing plate 903 is bolted to the right end of the rain shield 901, fitting snugly against the rubber ring 902. An inflation valve 201 is located on the right side of the tank body 200. When the drive shaft 705 rotates for a long time, causing a gap to appear at the connection between the drive shaft 705 and the tank body 200, the interior of the tank body 200 communicates with the interior of the rain shield 901 through this gap. The rubber ring 902 and the sealing plate 903 then work together to create a seal. Furthermore, the tilted design of the right end of the rain shield 901 prevents water from entering its interior and prevents the end of the drive shaft 705 and the turntable 708 from being exposed to air and corroding.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A switching structure for a three-phase common-tank surge arrester, characterized in that: The system includes a base, a tank fixedly mounted on the top of the base, a high-voltage end insulator fixedly mounted on the top of the tank, a guide rod fixedly arranged in an array on the top of the base, a slide block slidably connected to the guide rod, three cores fixedly arranged in an array on the slide block, three low-voltage end insulators arranged in an array on the base, three high-voltage end shielding seats arranged in an array at the bottom of the high-voltage end insulators, the cores being electrically connected to the low-voltage end insulators, and the top of the cores being compatible with and inserted into the high-voltage end shielding seats. A lifting drive component is provided at the center of the slide block, a limit assembly is provided between the slide block and the guide rod, and a sealing box is fixedly installed on the outer wall of the tank.

2. The switching structure of the three-phase common-tank surge arrester according to claim 1, characterized in that: The base has a bottom shell fixedly installed at the bottom, and three partitions are arranged in an array on the top of the base. The three partitions are welded together at one end near the axis of the tank body, and each low-voltage end insulator is located between two adjacent partitions.

3. The switching structure of the three-phase common-tank surge arrester according to claim 1, characterized in that: The slide includes a lower support plate, a support tube is fixedly installed at the top center of the lower support plate, an upper support plate is fixedly installed at the top of the support tube, the core is fixedly fixed through the lower support plate and the support tube, and the lower support plate and the upper support plate are slidably connected to the guide rod.

4. The switching structure of the three-phase common-tank surge arrester according to claim 3, characterized in that: The lifting drive component includes a rotating shaft rotatably connected to the connection of three partitions. The rotating shaft passes through the inside of the support tube. The upper half of the rotating shaft has a threaded groove, and the inner wall of the support tube is threaded. The rotating shaft is threaded to the support tube through the threaded groove. A first bevel gear is fixedly installed on the lower half of the rotating shaft. A second bevel gear meshes with the right side of the first bevel gear. A drive shaft is fixedly installed at the right end of the second bevel gear. The drive shaft is rotatably connected to the tank body. A support is fixedly installed on the top of the base. The drive shaft is rotatably connected to the support. A cross-shaped protrusion is fixedly installed at the right end of the drive shaft, and a turntable is sleeved on the cross-shaped protrusion.

5. The switching structure of the three-phase common-tank surge arrester according to claim 1, characterized in that: The limiting component includes three sleeves fixedly arranged in an array on the lower support plate. A spring is fixedly installed on the inner wall of the sleeve, and a retaining strip is fixedly installed on the other end of the spring. An arc-shaped part is provided on the other end of the retaining strip. The upper half of the guide rod has a V-shaped groove, the retaining strip is inserted into the V-shaped groove, and the retaining strip is attached to the surface of the guide rod through the arc part.

6. The switching structure of the three-phase common-tank surge arrester according to claim 1, characterized in that: The sealed box includes a rain cover welded to the right side of the tank body. The rain cover covers the outside of the turntable. The right end of the rain cover is tilted downward. A rubber ring is fixedly installed on the right end of the rain cover. A sealing plate is fixedly installed on the right end of the rain cover by bolts. The sealing plate is attached to the rubber ring.

7. The switching structure of the three-phase common-tank surge arrester according to claim 6, characterized in that: An inflation valve is installed on the right side of the tank.

Images