Lightning impulse protection device for transformer

Abstract

The utility model provides a lightning impulse protection device for a transformer, and relates to the technical field of lightning arresters, the lightning impulse protection device for the transformer comprises a mounting plate, two ends of the mounting plate are respectively provided with a protection mechanism, the protection mechanism comprises two rectangular blocks, the inner walls of the two rectangular blocks are rotatably connected with a rotating shaft, and the rotating shaft is connected with the mounting plate. A rotating shaft is arranged on the outer side of the screw rod, a coil spring is arranged on one side of the rotating shaft, an L-shaped rod is fixedly connected to the outer surface of the rotating shaft, and a piston block is rotationally connected to one end of the screw rod. The piston block slides on the inner wall of the rectangular groove by rotating the screw rod, so that the airbag sheet deforms and expands outwards, the outer side of the joint of the lightning arrester body and the high-voltage line is wrapped and protected, the influence of rain and sun on the outer side of the joint of the high-voltage line and the lightning arrester body is reduced as much as possible, the service life of the lightning arrester body is prolonged, and the use effect of the lightning arrester body is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lightning protection device technical field especially relates to a lightning protection device for transformer. BACKGROUND

[0002] The power transformer is a kind of static electrical equipment, is used to become the AC voltage (current) of a numerical value the equipment of different voltage (current) of frequency same another or several numerical values, and power transformer is mainly installed in outdoor use, and outdoor environment is more harsh, lightning protection device installed outside transformer can avoid lightning strike as far as possible to cause the lightning damage of transformer.

[0003] Lightning arrester needs to connect one end with the high-voltage line of transformer when installing, and the other end is connected with the ground wire, and the connecting place of lightning arrester and high-voltage line can be damaged and loose due to rain erosion or sun exposure in daily use, which leads to the problem of reducing service life and use effect of lightning arrester. UTILITY MODEL CONTENT

[0004] The utility model discloses a lightning protection device for transformer, which solves the problem of lightning arrester and high-voltage line connection in daily use, which can be damaged and loose due to rain erosion or sun exposure, leading to the problem of reducing service life and use effect of lightning arrester.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: a lightning protection device for transformer, comprising a mounting plate, a plurality of mounting holes are formed on the outer surface of the mounting plate, two lightning arrester bodies are arranged on one side of the mounting plate, a plurality of zinc oxide varistors are arranged in the two lightning arrester bodies, a protection mechanism for protecting the connection between lightning arrester body and high-voltage line is arranged at both ends of the mounting plate, and a protection device is arranged on one side of the mounting plate.

[0006] The above-mentioned components achieve the following effects: when installing the lightning protection device, the side of the mounting plate is attached to the outside of the frame rod of the transformer, the mounting plate is connected with the transformer shell frame rod by using bolts passing through the mounting holes on the outer surface of the mounting plate, the high-voltage line is connected with the top end of the lightning arrester body, and the connection between the high-voltage line and the lightning arrester body is protected by the protection mechanism.

[0007] Preferably, the protection mechanism comprises two rectangular blocks, one end of the rectangular blocks is fixedly connected with one side of the mounting plate, the inner walls of the two rectangular blocks are rotationally connected with shafts, one side of the shafts is provided with a coil spring, the two ends of the coil spring are fixedly connected with one side of the rectangular block and one side of the shaft respectively, the outer surfaces of the shafts are fixedly connected with L-shaped rods, the interiors of the L-shaped rods are provided with rectangular grooves, one end of the inner walls of the rectangular grooves is provided with a plurality of air channels, one side of the inner walls of the air channels is fixedly connected with air bag pieces, one end of the inner walls of the L-shaped rods is threadedly connected with a screw rod, one end of the screw rod is rotationally connected with a piston block, the outer surface of the piston block slides on the inner wall of the rectangular groove.

[0008] The above-mentioned components achieve the effect that: by arranging the piston block, when the lightning protection impact protection device is installed, the L-shaped rod on one side of the lightning arrester body is rotated away from the lightning arrester body and the coil spring at one end of the shaft is deformed, then the high-voltage line is connected with the top end of the lightning arrester body, after the connection is completed, the L-shaped rod is loosened, the shaft and the L-shaped rod are rotated by the coil spring to make one end of the L-shaped rod located outside the connection between the lightning arrester body and the high-voltage line, and then the screw rod is rotated to control the movement of the screw rod at one end of the inner wall of the L-shaped rod to push the piston block to slide on the inner wall of the rectangular groove, the air inside the rectangular groove is pushed into the air channels, the air bag pieces outside the air channels are deformed and inflated outward, the connection between the lightning arrester body and the high-voltage line is wrapped and protected outside, the influence of rain and sunshine on the outside of the connection between the high-voltage line and the lightning arrester body is reduced as much as possible, and the service life and use effect of the lightning arrester body are improved.

[0009] Preferably, one end of the L-shaped rod is fixedly connected with a limiting piece, and the limiting piece is located above the two air bag pieces.

[0010] The above-mentioned components achieve the effect that: when the air inside the air channels is inflated to make the air bag pieces inflate, the position of the air bag can be concentrated by the limiting piece, so that the inflated air bag is located as much as possible outside the connection between the lightning arrester body and the high-voltage line, and the protection effect is improved.

[0011] Preferably, one end of the shaft is provided with a positioning assembly, the positioning assembly comprises a threaded ring, one side of the threaded ring is rotationally connected with a U-shaped block, one end of the shaft is provided with a threaded groove, and the inner wall of the threaded ring is threadedly connected with the outer surface of the shaft provided with the threaded groove.

[0012] The effect achieved by the above components is that when the top end of the lightning arrester body is connected with the high-voltage line and the L-shaped rod is pushed to rotate away from the lightning arrester body, the threaded ring can be rotated to move on the outer surface of the rotating shaft provided with a threaded groove, and the U-shaped block is clamped on the outer surface of the rectangular block, thereby temporarily fixing the positions of the rotating shaft and the L-shaped rod; after installation is completed, the threaded ring is rotated away from the rectangular block, and after the position of the L-shaped rod is fixed, the threaded ring can be rotated again to move the U-shaped block to be clamped on the outer side of the rectangular block, thereby fixing the positions of the rotating shaft and the L-shaped rod.

[0013] Preferably, the end of the rotating shaft away from the rectangular block is fixedly connected with a stop block, and the length of the stop block is greater than the diameter of the rotating shaft.

[0014] The effect achieved by the above components is that the movement range of the threaded ring on the outer surface of the rotating shaft can be limited by the stop block, and the threaded ring can be prevented from falling off the surface of the rotating shaft when moving outward on the outer surface of the rotating shaft.

[0015] Preferably, one side of the mounting plate is provided with a protection device, the protection device comprises a rectangular plate, a plurality of through holes are formed in the outer surface of the rectangular plate, a plurality of rubber rings are fixedly connected to one side of the rectangular plate, and two elastic metal sheets are fixedly connected to one side of the rectangular plate, and the distance between the two elastic metal sheets is slightly greater than the width of the mounting plate.

[0016] The effect achieved by the above components is that when the mounting plate is connected with the transformer shell frame rod by using a bolt, the two elastic metal sheets can be bent outward and clamped on the upper and lower ends of the mounting plate, the through holes in the outer surface of the rectangular plate are aligned with the mounting holes in the outer surface of the mounting plate, then the bolt is passed through the rubber ring and the through hole on one side of the rectangular plate to connect the mounting plate with the transformer, the rubber ring can seal and protect the outside of the connection between the bolt and the transformer, the probability of rusting of the connection is reduced as much as possible, and the service life of the lightning arrester body and the mounting plate is prolonged.

[0017] Preferably, the two ends of the elastic metal sheet are fixedly connected with a plurality of convex strips, and the convex strips are rubber strips made of rubber.

[0018] The effect achieved by the above components is that the convex strips made of rubber can increase the friction force between the elastic metal sheet and the surface of the mounting plate when the elastic metal sheet is clamped on the outer surface of the mounting plate, thereby improving the stability of the elastic metal sheet clamped on the outer surface of the mounting plate.

[0019] Compared with the prior art, the advantages and positive effects of the utility model are that:

[0020] In this utility model, by setting up a protective mechanism, when installing the lightning strike protection device, one end of the L-shaped rod is locked on the outside of the connection between the surge arrester body and the high-voltage line. The rotating screw piston block slides on the inner wall of the rectangular groove, causing the airbag to deform and expand outward, thus wrapping and protecting the outside of the connection between the surge arrester body and the high-voltage line. This minimizes the impact of rain and sun on the outside of the connection between the high-voltage line and the surge arrester body, thereby improving the service life and performance of the surge arrester body. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the mounting plate of this utility model;

[0023] Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the L-shaped rod of this utility model;

[0024] Figure 4 This is a three-dimensional structural diagram of the rectangular plate of this utility model.

[0025] Legend: 1. Mounting plate; 2. Protection mechanism; 3. Protective device; 4. Surge arrester body; 21. Rectangular block; 22. Rotating shaft; 23. L-shaped rod; 24. Rectangular groove; 25. Air passage; 26. Airbag plate; 27. Screw; 28. Piston block; 29. ​​Positioning assembly; 391. Threaded groove; 292. Threaded ring; 293. U-shaped block; 294. Stop block; 210. Coil spring; 211. Limiting plate; 31. Rectangular plate; 32. Rubber ring; 33. Elastic metal sheet; 34. Raised strip. Detailed Implementation

[0026] Example 1, such as Figures 1-2 As shown, a lightning impulse protection device for a transformer includes a mounting plate 1. The outer surface of the mounting plate 1 has several mounting holes. Two surge arrester bodies 4 are installed on one side of the mounting plate 1. Several zinc oxide resistance sheets are installed inside the two surge arrester bodies 4. Protection mechanisms 2 are installed at both ends of the mounting plate 1 to protect the connection between the surge arrester body 4 and the high-voltage line. A protective device 3 is installed on one side of the mounting plate 1. When installing the lightning impulse protection device, one side of the mounting plate 1 is attached to the outside of the transformer's frame. Bolts are used to pass through the mounting holes on the outer surface of the mounting plate 1 to connect the mounting plate 1 to the transformer's outer frame. Then, the high-voltage line is connected to the top of the surge arrester body 4. The protection mechanism 2 protects the outside of the connection between the high-voltage line and the surge arrester body 4.

[0027] Reference Figures 1-3As shown, in the embodiment: the protection mechanism 2 includes two rectangular blocks 21, one end of the rectangular block 21 is fixedly connected with one side of the mounting plate 1, the inner wall of the two rectangular blocks 21 is rotatably connected with a rotating shaft 22, one side of the rotating shaft 22 is provided with a coil spring 210, both ends of the coil spring 210 are fixedly connected with one side of the rectangular block 21 and one side of the rotating shaft 22 respectively, the outer surface of the rotating shaft 22 is fixedly connected with an L-shaped rod 23, the inside of the L-shaped rod 23 is provided with a rectangular groove 24, a plurality of air channels 25 are formed in one end of the inner wall of the rectangular groove 24, the inner wall of the air channel 25 is fixedly connected with an air bag piece 26 on one side, and a screw rod 27 is threadedly connected with one end of the inner wall of the L-shaped rod 23, one end of the screw rod 27 is rotatably connected with a piston block 28, and the outer surface of the piston block 28 slides on the inner wall of the rectangular groove 24. By arranging the piston block 28, when installing the lightning protection impact protection device, the L-shaped rod 23 on one side of the lightning arrester body 4 is pushed to rotate away from the lightning arrester body 4 and the coil spring 210 at one end of the rotating shaft 22 is deformed, then the high-voltage line is connected with the top end of the lightning arrester body 4, after the connection is completed, the L-shaped rod 23 is loosened, the rotating shaft 22 and the L-shaped rod 23 are driven to rotate by the coil spring 210 to make one end of the L-shaped rod 23 located outside the connection between the lightning arrester body 4 and the high-voltage line, and then the screw rod 27 is rotated to control the screw rod 27 to move on one end of the inner wall of the L-shaped rod 23 to push the piston block 28 to slide on the inner wall of the rectangular groove 24, the air inside the rectangular groove 24 is pushed to the inside of the air channel 25, the air bag piece 26 outside the air channel 25 is deformed and expands outward, the outside of the connection between the lightning arrester body 4 and the high-voltage line is wrapped and protected, the influence of rain and sunshine on the outside of the connection between the high-voltage line and the lightning arrester body 4 is reduced as much as possible, and the service life and use effect of the lightning arrester body 4 are improved.

[0028] Referring to Figures 2-3 As shown, in the embodiment: one end of the L-shaped rod 23 is fixedly connected with a limiting piece 211, the limiting piece 211 is located above the two air bag pieces 26, and when the air inside the air channel 25 makes the air bag piece 26 expand, the position of the air bag can be concentrated through the limiting piece 211, so that the expanded air bag is located as much as possible outside the connection between the lightning arrester body 4 and the high-voltage line, and the protection effect is improved.

[0029] Referring to Figures 2-3As shown, in the embodiment: one end of the rotating shaft 22 is provided with a positioning assembly 29, the positioning assembly 29 comprises a threaded ring 292, one side of the threaded ring 292 is rotatably connected with a U-shaped block 293, one end of the rotating shaft 22 is provided with a threaded groove 391, and the inner wall of the threaded ring 292 is threadedly connected with the outer surface of the rotating shaft 22 provided with the threaded groove 391. When the top end of the lightning arrester body 4 is connected with the high-voltage line and the L-shaped rod 23 is pushed to rotate away from one side of the lightning arrester body 4, the threaded ring 292 can be rotated to move the threaded ring 292 on the outer surface of the rotating shaft 22 provided with the threaded groove 391 to push the U-shaped block 293, the U-shaped block 293 is clamped on the outer surface of the rectangular block 21, and the positions of the rotating shaft 22 and the L-shaped rod 23 are temporarily fixed. After installation is completed, the threaded ring 292 is rotated away from one side of the rectangular block 21, and after the position of the L-shaped rod 23 is fixed, the threaded ring 292 can be rotated again to push the U-shaped block 293 to move and be clamped on the outside of the rectangular block 21 to fix the positions of the rotating shaft 22 and the L-shaped rod 23. One end of the rotating shaft 22 away from the rectangular block 21 is fixedly connected with a stop block 294, and the length of the stop block 294 is greater than the diameter of the rotating shaft 22. By arranging the stop block 294, the movement range of the threaded ring 292 on the outer surface of the rotating shaft 22 can be limited, and the threaded ring 292 is prevented from moving outward on the outer surface of the rotating shaft 22 and falling off the surface of the rotating shaft 22.

[0030] Referring to Figure 1 , Figure 2 and Figure 4 As shown, in the embodiment: one side of the mounting plate 1 is provided with a protection device 3, the protection device 3 comprises a rectangular plate 31, a plurality of through holes are formed in the outer surface of the rectangular plate 31, a plurality of rubber rings 32 are fixedly connected to one side of the rectangular plate 31, and two elastic metal sheets 33 are fixedly connected to one side of the rectangular plate 31. The distance between the two elastic metal sheets 33 is slightly greater than the width of the mounting plate 1. When the mounting plate 1 is connected with the transformer shell support rod by using bolts, the two elastic metal sheets 33 can be outwardly bent and clamped on the upper and lower ends of the mounting plate 1, so that the through holes in the outer surface of the rectangular plate 31 are aligned with the mounting holes in the outer surface of the mounting plate 1. Then, the bolts pass through the rubber rings 32 and the through holes on one side of the rectangular plate 31 to connect the mounting plate 1 with the transformer. The rubber rings 32 can seal and protect the outside of the connection between the bolts and the transformer, thereby reducing the probability of corrosion at the connection and prolonging the service life of the lightning arrester body 4 and the mounting plate 1.

[0031] Referring to Figure 1 , Figure 2 and Figure 4As shown, in the embodiment: the two ends of the elastic metal sheet 33 are fixedly connected with a plurality of convex strips 34, the convex strips 34 are rubber strips made of rubber material, by arranging the convex strips 34 made of rubber material, the friction force of the elastic metal sheet 33 when clamped on the outer surface of the mounting plate 1 can be increased, and the stability of the elastic metal sheet 33 when clamped on the outer surface of the mounting plate 1 can be improved.

[0032] Working principle: when installing the lightning impact protection device, the two elastic metal sheets 33 are outwardly bent and clamped on the upper and lower ends of the mounting plate 1, the through hole on the outer surface of the rectangular plate 31 is aligned with the mounting hole on the outer surface of the mounting plate 1, then the bolt is passed through the rubber ring 32 and the through hole on one side of the rectangular plate 31 to connect the mounting plate 1 and the transformer, the rubber ring 32 can seal and protect the outside of the connection between the bolt and the mounting plate 1 and the transformer, then the L-shaped rod 23 on one side of the lightning arrester body 4 is pushed to rotate away from the lightning arrester body 4 and the coil spring 210 at one end of the rotating shaft 22 is deformed, the threaded ring 292 is moved to push the U-shaped block 293 by rotating the threaded ring 292 on the outer surface of the threaded groove 391 of the rotating shaft 22, the U-shaped block 293 is clamped on the outer surface of the rectangular block 21, and the position of the rotating shaft 22 and the L-shaped rod 23 is temporarily fixed, then the high-voltage line is connected with the top end of the lightning arrester body 4, after the connection is completed, the threaded ring 292 is rotated away from one side of the rectangular block 21, the position of the L-shaped rod 23 is released, the rotating shaft 22 and the L-shaped rod 23 are rotated by the coil spring 210, and one end of the L-shaped rod 23 is located outside the connection between the lightning arrester body 4 and the high-voltage line, then the screw rod 27 is rotated to control the movement of the screw rod 27 at one end of the inner wall of the L-shaped rod 23 to push the piston block 28 to slide in the rectangular groove 24, the air inside the rectangular groove 24 is pushed to the inside of the air duct 25, and the air bag piece 26 outside the air duct 25 is deformed to expand outwardly, and the connection between the lightning arrester body 4 and the high-voltage line is wrapped and protected.

[0033] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and alteration of the above embodiments without departing from the technical content of the present application, according to the technical essence of the present application, still belong to the protection scope of the present application. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be connected inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A lightning surge protection device for a transformer, comprising a mounting plate (1), characterized in that: The outer surface of the mounting plate (1) is provided with a plurality of mounting holes, one side of the mounting plate (1) is provided with two lightning arrestor bodies (4), the inside of the two lightning arrestor bodies (4) is provided with a plurality of zinc oxide varistors, the two ends of the mounting plate (1) are respectively provided with protection mechanisms (2) capable of protecting the connection between the lightning arrestor body (4) and the high-voltage line, and one side of the mounting plate (1) is provided with a protection device (3).

2. A lightning surge protection device for a transformer according to claim 1, characterized in that: The protection mechanism (2) comprises two rectangular blocks (21), one end of the rectangular block (21) is fixedly connected with one side of the mounting plate (1), the inner walls of the two rectangular blocks (21) are rotatably connected with shafts (22), one side of the shaft (22) is provided with a coil spring (210), the two ends of the coil spring (210) are fixedly connected with one side of the rectangular block (21) and one side of the shaft (22), the outer surface of the shaft (22) is fixedly connected with an L-shaped rod (23), the inside of the L-shaped rod (23) is provided with a rectangular groove (24), a plurality of air channels (25) are formed in one end of the inner wall of the rectangular groove (24), one side of the inner wall of the air channel (25) is fixedly connected with an air bag piece (26), one end of the L-shaped rod (23) is threadedly connected with a screw rod (27), one end of the screw rod (27) is rotatably connected with a piston block (28), and the outer surface of the piston block (28) slides on the inner wall of the rectangular groove (24).

3. A lightning surge protection device for a transformer according to claim 2, characterized in that: One end of the L-shaped rod (23) is fixedly connected with a limiting piece (211), and the limiting piece (211) is located above the two air bag pieces (26).

4. A lightning surge protection device for a transformer according to claim 3, characterized in that: One end of the shaft (22) is provided with a positioning assembly (29) capable of further fixing the positions of the shaft (22) and the L-shaped rod (23).

5. A lightning surge protection device for a transformer according to claim 4, characterized in that: The positioning assembly (29) comprises a threaded ring (292), one side of the threaded ring (292) is rotatably connected with a U-shaped block (293), one end of the shaft (22) is provided with a threaded groove (391), and the inner wall of the threaded ring (292) is threadedly connected with the outer surface of the shaft (22) provided with the threaded groove (391).

6. A lightning surge protection device for a transformer according to claim 5, characterized in that: One end of the shaft (22) away from the rectangular block (21) is fixedly connected with a stop block (294), and the length of the stop block (294) is greater than the diameter of the shaft (22).

7. A lightning surge protection device for a transformer according to claim 6, characterized in that: One side of the mounting plate (1) is provided with a protection device (3), the protection device (3) comprises a rectangular plate (31), a plurality of through holes are formed in the outer surface of the rectangular plate (31), a plurality of rubber rings (32) are fixedly connected to one side of the rectangular plate (31), two elastic metal sheets (33) are fixedly connected to one side of the rectangular plate (31), and the distance between the two elastic metal sheets (33) is slightly greater than the width of the mounting plate (1).

8. A lightning surge protection device for a transformer according to claim 7, characterized in that: The two ends of the elastic metal sheet (33) are fixedly connected with a plurality of convex strips (34), and the convex strips (34) are rubber strips made of rubber material.

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