Modular lightning arrester tripping structure for superhigh voltage system

Abstract

The utility model discloses a modular lightning protection device tripping structure for superhigh pressure system belongs to surge protection ware technical field, including plastic swing bar, top electrode sheet, tripping electrode, hard electrode, pressure sensitive resistance sheet, bottom electrode sheet and base, the bottom end articulates on the cylinder of base of plastic swing bar, the top end of plastic swing bar is connected with base through spring, be provided with the bending part of elastic reset on tripping electrode, the end of tripping electrode is fixed in the clamping slot of base. The utility model discloses when the pressure sensitive resistance sheet deteriorates and heats, the heat is conducted to the solder through the convex and makes it melt, and tripping electrode bounces up, and plastic swing bar rotates and is blocked between tripping electrode and convex under the spring tension, and this structure increases the electrode spacing through the swing bar isolation, and the insulation strength is improved to 1000V / mm above, and the convex design realizes the heat stable conduction simultaneously, avoids the lightning instantaneous heating false trigger, and accurately judges the deterioration state, and the practicality is good.

Description

Technical Field

[0001] This utility model relates to the field of surge protector technology, and more specifically, to a modular surge protector tripping structure for ultra-high voltage systems. Background Technology

[0002] Surge protectors, also known as lightning arresters, are electronic devices that provide safety protection for various electronic equipment, instruments, and communication lines. When a surge current or voltage spike suddenly occurs in an electrical circuit or communication line due to external interference, the surge protector can conduct and divert the current in a very short time, thereby preventing damage to other equipment in the circuit. Traditional surge protector tripping structures have two defects: 1) The electrode spacing after tripping is small (usually <3mm), resulting in insufficient insulation strength; 2) The heat conduction path between the electrodes is short, and the instantaneous high temperature of lightning strikes can easily lead to false tripping. To address these issues, we propose a modular surge protector tripping structure for ultra-high voltage systems. Utility Model Content

[0003] In view of the problems mentioned in the background art above, the purpose of this utility model is to provide a modular surge protector tripping structure for ultra-high voltage systems.

[0004] To solve the above problems, this utility model adopts the following technical solution: a modular surge arrester tripping structure for ultra-high voltage systems, comprising a plastic swing rod, a top electrode plate, a tripping electrode, a hard electrode, a varistor plate, a bottom electrode plate, and a base. The bottom end of the plastic swing rod is hinged to the cylinder of the base, and the top end of the plastic swing rod is connected to the base via a spring. The tripping electrode is provided with an elastically resettable bent portion, and the end of the tripping electrode is fixed in a slot in the base. The top electrode plate is provided with a protruding structure extending toward the tripping electrode. The protruding structure on the top electrode plate is soldered to the elastically bent portion of the tripping electrode. The hard electrode is soldered to the bottom electrode plate via high-temperature solder. The top electrode plate and the bottom electrode plate are respectively soldered to the upper and lower surfaces of the varistor plate.

[0005] As a preferred embodiment of this utility model, the plastic swing rod is an L-shaped insulator, and the inner side of the plastic swing rod is provided with a limiting groove that matches the protrusion of the top electrode plate.

[0006] As a preferred embodiment of this utility model, the bent portion of the tripping electrode forms an angle of 15° to 30° with the horizontal plane, and the displacement distance of the bent portion of the tripping electrode after springing up is ≥5mm.

[0007] As a preferred embodiment of this utility model, the high-temperature solder has a melting point of 280℃-320℃ and the solder has a melting point of 120℃-150℃.

[0008] As a preferred embodiment of this utility model, the protruding cross-section of the top electrode sheet is trapezoidal, and the height is 2-3mm.

[0009] As a preferred embodiment of this utility model, the vertical distance between the end of the plastic swing rod and the bent part of the tripping electrode after rotation is ≥8mm.

[0010] The advantages of this invention are as follows: When the varistor deteriorates and heats up, the heat is conducted to the solder through the protrusion, causing it to melt. The tripping electrode springs up, and the plastic swing rod rotates under the tension of the spring and blocks the tripping electrode between the protrusion. This structure increases the electrode spacing through the isolation of the swing rod, improving the insulation strength to over 1000V / mm. At the same time, the protrusion design achieves stable heat conduction, avoids false triggering due to instantaneous temperature rise during lightning strikes, accurately determines the deterioration state, and has good practicality. Attached Figure Description

[0011] Figure 1 is a schematic diagram of the overall structure of this utility model.

[0012] Figure 2 is an exploded view of the overall structure of this utility model.

[0013] Figure 3 is a top view of the present invention.

[0014] Figure 4 is a schematic diagram of the top electrode sheet of this utility model.

[0015] The labels in the diagram are as follows: 1. Plastic swing rod; 2. Top electrode plate; 3. Tripping electrode; 4. Hard electrode; 5. Varistor plate; 6. Bottom electrode plate; 7. Base. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0019] Please refer to Figures 1-4. A modular surge arrester tripping structure for an ultra-high voltage system includes a plastic swing rod 1, a top electrode plate 2, a tripping electrode 3, a hard electrode 4, a varistor plate 5, a bottom electrode plate 6, and a base 7. The bottom end of the plastic swing rod 1 is hinged to the cylinder of the base 7, and the top end of the plastic swing rod 1 is connected to the base 7 via a spring 8. The tripping electrode 3 is provided with a bend that can be elastically reset, and the end of the tripping electrode 3 is fixed in a slot in the base 7. The top electrode plate 2 is provided with a protrusion extending toward the tripping electrode 3. The protrusion on the top electrode plate 2 is soldered to the elastic bend of the tripping electrode 3. The hard electrode 4 is soldered to the bottom electrode plate 6 via high-temperature solder. The top electrode plate 2 and the bottom electrode plate 6 are respectively soldered to the upper and lower surfaces of the varistor plate 5.

[0020] In this embodiment, the plastic swing arm 1 is made of PBT material with a withstand voltage rating of ≥20kV.

[0021] Specifically, please refer to Figure 2. The plastic swing rod 1 is an L-shaped insulator, and the inner side of the plastic swing rod 1 is provided with a limiting groove that matches the protrusion of the top electrode plate 2.

[0022] Specifically, please refer to Figure 2. The bent part of the tripping electrode 3 forms an angle of 15° to 30° with the horizontal plane, and the displacement distance of the bent part of the tripping electrode 3 after it springs up is ≥5mm.

[0023] Specifically, please refer to Figures 1 and 2. The melting point of high-temperature solder is 280℃-320℃, and the melting point of solder is 120℃-150℃.

[0024] Specifically, please refer to Figure 4. The protruding cross-section of the top electrode plate 2 is trapezoidal, and the height is 2-3mm.

[0025] In this embodiment, the top electrode plate 2 protrudes to increase heat capacity and buffer instantaneous temperature rise, such as an 8 / 20μs lightning strike.

[0026] Specifically, please refer to Figures 1 and 2. After the plastic swing rod 1 is rotated, the vertical distance between its end and the bent part of the tripping electrode 3 is ≥8mm.

[0027] Working principle: During assembly, firstly, the varistor 5 is soldered between the bottom electrode 6 and the hard electrode 4. Then, the trip electrode 3 is snapped into the base 7, and its bent part is soldered to the top electrode protrusion with low temperature solder. Finally, the bottom end of the plastic swing rod 1 is fitted onto the cylinder of the base 7, and the top spring 8 of the plastic swing rod 1 is hooked onto the hook of the base 7. During operation, the varistor 5 deteriorates and heats up. The heat is transferred through the trapezoidal protrusion of the top electrode 2, melting the solder. The elastic bending part of the trip electrode 3 springs up. After the trip electrode 3 springs up, the plastic swing rod 1 is pulled by the spring 8 and rotates 90° around the hinge point. Its end is inserted between the trip electrode 3 and the protrusion to form a physical isolation. During the experiment, it did not trip under a 10kA lightning current impact, and the temperature rise was less than 100℃; the varistor 5 stably tripped when it deteriorated to 120℃, the electrode spacing increased to 10.2mm, and the insulation withstand voltage increased to 42kV.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A modular surge arrester tripping structure for ultra-high voltage systems, characterized in that: The device includes a plastic swing rod (1), a top electrode plate (2), a tripping electrode (3), a hard electrode (4), a varistor plate (5), a bottom electrode plate (6), and a base (7). The bottom end of the plastic swing rod (1) is hinged to the cylinder of the base (7), and the top end of the plastic swing rod (1) is connected to the base (7) by a spring (8). The tripping electrode (3) is provided with a bend that can be elastically reset. The end of the tripping electrode (3) is fixed in the slot of the base (7). The top electrode plate (2) is provided with a protrusion extending toward the tripping electrode (3). The protrusion on the top electrode plate (2) is soldered to the elastic bend of the tripping electrode (3). The hard electrode (4) is soldered to the bottom electrode plate (6) by high-temperature solder. The top electrode plate (2) and the bottom electrode plate (6) are respectively soldered to the upper and lower surfaces of the varistor plate (5).

2. The modular surge protector tripping structure for ultra-high voltage systems according to claim 1, characterized in that: The plastic swing rod (1) is an L-shaped insulator, and the inner side of the plastic swing rod (1) is provided with a limiting groove that matches the protrusion of the top electrode plate (2).

3. The modular surge protector tripping structure for ultra-high voltage systems according to claim 1, characterized in that: The bent part of the tripping electrode (3) forms an angle of 15° to 30° with the horizontal plane, and the displacement distance of the bent part of the tripping electrode (3) after it springs up is ≥5mm.

4. The modular surge protector tripping structure for ultra-high voltage systems according to claim 1, characterized in that: The high-temperature solder has a melting point of 280℃-320℃ and a melting point of 120℃-150℃.

5. The modular surge protector tripping structure for ultra-high voltage systems according to claim 1, characterized in that: The top electrode plate (2) has a trapezoidal cross-section and a height of 2-3 mm.

6. The modular surge protector tripping structure for ultra-high voltage systems according to claim 1, characterized in that: After the plastic swing rod (1) is rotated, the vertical distance between its end and the bent part of the trip electrode (3) is ≥8mm.

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