Electrohydraulic effect dynamic shift arc extinguishing structure and surge suppressor

Abstract

The utility model discloses a hydroelectric effect dynamic shift arc extinguishing structure and a surge suppressor, comprising an insulation housing, a lightning connection electrode, a lower pole plate and a free telescopic shift assembly vertically arranged in the cavity of the insulation housing, and the cavity of the insulation housing is filled with insulation liquid in a sealed manner; a lightning electrode is vertically arranged at the top end of the insulating shell, and the lower end of the lightning electrode extends downwards into the insulating shell and is electrically connected with the upper end of the free telescopic displacement assembly. The lower polar plate is horizontally arranged in the bottom end of the insulating shell, a screw rod is vertically arranged at the bottom end of the insulating shell, and the upper end of the screw rod vertically extends upwards into the bottom end in a cavity of the insulating shell and is connected with the lower surface of the lower polar plate; the lower end of the free telescopic displacement assembly vertically extends downwards to the position above the lower pole plate and makes contact with the upper surface of the lower pole plate or is arranged at an interval with the upper surface of the lower pole plate. According to the arc extinguishing structure, the initial breakdown voltage during arc extinguishing can be reduced, the arc length can be increased, and the arc extinguishing capability can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lightning protection technical field especially relates to a liquid electricity effect dynamic shift arc extinguishing structure and surge suppressor. BACKGROUND

[0002] As a new lightning protection arc extinguishing technology, liquid electricity effect arc extinguishing technology has been gradually applied to various transmission lines and played a significant protection role due to its advantages of fast arc extinguishing speed, strong arc extinguishing capacity and high arc extinguishing success rate. A liquid gap with fixed length is arranged inside the conventional liquid electricity effect arc extinguishing device to provide a liquid channel for current discharge to trigger liquid electricity effect forced arc extinguishing. However, the fixed liquid gap can cause the initial breakdown voltage of the arc extinguishing device to increase, which is not conducive to insulation coordination. In addition, the fixed liquid gap limits the length of the discharge arc in the insulating liquid, and the arc energy cannot be released to the maximum extent for arc extinguishing. Therefore, there is an urgent need for a new liquid electricity effect arc extinguishing structure and method with low initial breakdown voltage and dynamic arc lengthening. SUMMARY

[0003] The utility model discloses a liquid electricity effect dynamic shift arc extinguishing structure and surge suppressor, which can reduce the initial breakdown voltage during arc extinguishing and lengthen the arc length, thereby improving the arc extinguishing capacity. To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0004] According to one aspect of the utility model, a liquid electricity effect dynamic shift arc extinguishing structure is provided, which comprises an insulating shell, a lightning electrode, a lower electrode plate and a free telescopic shift component vertically arranged in the cavity of the insulating shell, and the cavity of the insulating shell is filled with insulating liquid;

[0005] A lightning electrode is vertically arranged at the top end of the insulating shell, the lower end of the lightning electrode extends downward into the insulating shell and is electrically connected between the upper end of the free telescopic shift component (6), the lower electrode plate is horizontally arranged inside the bottom end of the insulating shell, a screw rod is vertically arranged at the bottom end of the insulating shell, the upper end of the screw rod vertically extends upward into the bottom end of the cavity of the insulating shell and is connected with the lower surface of the lower electrode plate, and the lower end of the free telescopic shift component vertically extends downward above the lower electrode plate and is in contact with or gap-arranged with the upper surface of the lower electrode plate.

[0006] A grounding electrode is vertically fixedly arranged on the upper surface of the lower electrode plate, and a displacement electrode is arranged at the lower end of the free telescopic shift component, the lower end of the displacement electrode at the lower end of the free telescopic shift component is in contact with or gap-arranged with the tip of the grounding electrode.

[0007] In a further preferred embodiment of the above scheme, a displacement plate is horizontally disposed at the lower end of the displacement electrode, and the center of the surface of the displacement plate is in contact with or separated from the tip of the grounding electrode.

[0008] In a further preferred embodiment of the above scheme, an upper electrode plate is horizontally fixedly installed at the top of the cavity of the insulating shell, the lower end of the lightning electrode extends downward into the insulating shell and is fixedly connected to the upper surface of the upper electrode plate, and the lower surface of the upper electrode plate is electrically connected to the upper end of the free telescopic displacement component.

[0009] In a further preferred embodiment of the above scheme, a locking cavity is provided between the lower end of the lightning electrode and the top of the cavity inside the insulating shell, and the diameter of the locking cavity is smaller than the diameter of the cavity inside the insulating shell. An upper electrode plate is horizontally fixed at the top of the locking cavity. The lower end of the lightning electrode extends downward into the top of the locking cavity and connects with the center of the upper surface of the upper electrode plate. The upper part of the free telescopic displacement component is disposed in the locking cavity. The upper end of the free telescopic displacement component is connected to the lower surface of the upper electrode plate. The lower end of the free telescopic displacement component extends vertically downward to the top of the lower electrode plate and contacts or gaps with the upper surface of the lower electrode plate.

[0010] In a further preferred embodiment of the above scheme, a partition plate is horizontally fixedly arranged in the positioning cavity above the top of the cavity inside the insulating shell, and multiple layers of uniformly stacked discharge electrode plates are arranged in the positioning cavity between the partition plate and the upper electrode plate. The upper end of the free telescopic displacement component extends into the positioning cavity and connects with the lower surface of the partition plate.

[0011] In a further preferred embodiment of the above scheme, there is a uniform electric field air gap between each adjacent discharge electrode plate, and the height of the electric field air gap is 0.1mm-1mm; the discharge electrode plate is a graphite sheet or a metal oxide electrode plate.

[0012] In a further preferred embodiment of the above scheme, the free telescopic displacement component is a temperature-sensitive spring, and a skirt is provided on the outer wall of the insulating shell.

[0013] According to the above technical scheme of the utility model, the utility model still provides the above mobile arc extinguishing structure is applied to surge suppressor, the surge suppressor includes shift arc extinguishing structure, the shift arc extinguishing structure includes insulation shell, connects lightning electrode, lower pole plate and the free telescopic shift subassembly of vertical setting in the cavity of insulation shell, the cavity in the insulation shell is sealed and filled with insulating liquid, the top end of the insulation shell is vertically provided with the lightning electrode, the inside top end of the cavity of the insulation shell is horizontally fixed with the upper pole plate, the lower pole plate is horizontally arranged in the bottom end inside the insulation shell, the screw rod is vertically arranged outside the bottom end of the insulation shell, the upper end of the screw rod is vertically extended into the bottom end of the cavity of the insulation shell and is connected with the lower surface of the lower pole plate, the lower end of the free telescopic shift subassembly is vertically extended to the upper surface of the lower pole plate and is contacted or is arranged with the gap, the partition pole plate is horizontally fixed in the clamping cavity above the top end of the cavity of the insulation shell, the multiple discharge electrode plates of uniform layering are arranged in the clamping cavity between the partition pole plate and the upper pole plate, and the upper end of the free telescopic shift subassembly is extended into the clamping cavity and is connected with the lower surface of the partition pole plate.

[0014] In summary, the utility model adopts the above technical scheme, and has the following technical effects:

[0015] (1) the arc extinguishing structure of the utility model can release a large amount of high-heat energy in the liquid gap when extinguishing arc, produce dynamic superimposed high-strength liquid-electric effect pressure on the arc channel, instantaneously interrupt the impact arc, extinguish the power frequency continuous flow, accelerate the generation speed of initial liquid-electric effect pressure, advance the liquid-electric effect arc extinguishing time node, improve the liquid-electric effect transience, and improve the forced arc extinguishing capacity.

[0016] (2) because the liquid gap is lengthened, the reignition breakdown distance is increased, and the liquid-electric effect pressure improves the dielectric breakdown field strength, so that the reignition breakdown voltage threshold of the overall structure is increased, the impact arc reignition is delayed, and the power frequency continuous flow cannot reignite.

[0017] (3) The arc extinguishing structure has the following characteristics: firstly, in the lightning voltage breakdown arc extinguishing channel stage, the initial breakdown voltage generated by the liquid-electric effect arc extinguishing chamber space in the insulating shell is reduced to zero by setting the temperature-sensitive telescopic spring short-circuit liquid gap, and the breakdown voltage of the arc extinguishing channel is determined by the breakdown voltage of the air gap outside the arc extinguishing chamber, thereby eliminating the influence of the too high breakdown voltage of the liquid gap on the insulation coordination; secondly, in the arc extinguishing process, the temperature-sensitive telescopic spring will quickly contract and become shorter under the spring temperature rise caused by the impact current, eliminating the short circuit of the liquid gap and dynamically lengthening the arc length, and through the impact arc and the power frequency arc and the liquid coupling of the insulating oil, the dynamic liquid-electric effect pressure is generated, the power frequency continuous current is forced to extinguish, and the arc extinguishing capacity is improved; finally, the temperature-sensitive spring contracted to the limit state forms the maximum liquid gap, improves the breakdown voltage of the liquid gap, and the liquid-electric effect pressure maintained in the sealed arc extinguishing chamber after arc extinguishing, improves the density and breakdown field strength of the liquid, and also improves the breakdown voltage, and the improvement of the above two breakdown voltages greatly improves the arc reignition resistance of the arc extinguishing chamber. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of a first embodiment of a liquid-electric effect dynamic displacement arc extinguishing structure of the utility model;

[0019] Figure 2 is a structural schematic view of a second embodiment of a liquid-electric effect dynamic displacement arc extinguishing structure of the utility model;

[0020] Figure 3 is a structural schematic view of a third embodiment of a liquid-electric effect dynamic displacement arc extinguishing structure of the utility model;

[0021] Figure 4 is a structural schematic view of a fourth embodiment of a liquid-electric effect dynamic displacement arc extinguishing structure of the utility model;

[0022] Figure 5 is a structural schematic view of a fifth embodiment of a liquid-electric effect dynamic displacement arc extinguishing structure of the utility model;

[0023] In the drawings, the insulating shell 1, the lightning electrode 2, the upper plate 3, the lower plate 4, the screw rod 5, the free telescopic displacement assembly 6, the insulating liquid 7, the clamping position cavity 8, the partition plate 9, the grounding electrode 10, the displacement electrode 11, the skirt 13, the displacement plate 12, the discharge electrode plate 14, and the electric field air gap 120. DETAILED DESCRIPTION

[0024] For the purpose, technical scheme and advantages of the utility model to be clearer, the following refers to the drawings and puts forward the preferred embodiment, and the utility model is further explained in detail. However, it needs to be indicated that many details listed in the specification are only for making the reader have a thorough understanding of one or more aspects of the utility model, and even without these specific details, the aspects of the utility model can be realized.

[0025] Embodiment one, in combination Figure 1 , according to the utility model discloses a kind of liquid-electric effect dynamic shift arc extinguishing structure, the shift arc extinguishing structure includes insulating shell 1, lightning electrode 2, lower pole plate 4 and vertically arranged in the free telescopic shift component 6 of insulating shell 1 cavity, in the cavity of insulating shell 1 is sealed and filled with insulating liquid 7;Lightning electrode 2 is vertically arranged at the top of insulating shell 1, and the lower end of the lightning electrode 2 is electrically connected between the upper end of the free telescopic shift component 6 and the insulating shell 1 into the lower end of the insulating shell 1;Lower pole plate 4 is horizontally arranged in the bottom of insulating shell 1, and screw rod 5 is vertically arranged at the bottom of insulating shell 1, and the upper end of the screw rod 5 is vertically extended into the bottom of the cavity of the insulating shell 1 and connected with the lower surface of the lower pole plate 4, and the lower end of the free telescopic shift component 6 is vertically extended to the upper surface of the lower pole plate 4 and is in contact or gap arrangement with the upper surface of the lower pole plate 4, in the utility model, upper pole plate 3 is horizontally fixedly arranged in the cavity of the insulating shell 1, the lower end of the lightning electrode 2 is fixedly connected with the upper surface of the upper pole plate 3 into the insulating shell 1, and the lower surface of the upper pole plate 3 is electrically connected between the upper end of the free telescopic shift component 6, the free telescopic shift component 6 is temperature-sensitive spring, and skirt 13 is arranged on the outer wall of the insulating shell 1.

[0026] Embodiment two, in combination Figure 1 And Figure 2 , the difference between the embodiment and embodiment one is that displacement electrode 11 is arranged at the lower end of the free telescopic shift component 6, and the lower end of the displacement electrode 11 at the lower end of the free telescopic shift component 6 is in contact or gap arrangement with the surface of the lower pole plate 4.

[0027] Embodiment three, in combination Figure 3 , the difference between the embodiment and embodiment two is that grounding electrode 10 is vertically fixedly arranged on the upper surface of the lower pole plate 4, displacement electrode 11 is arranged at the lower end of the free telescopic shift component 6, and the lower end of the displacement electrode 11 at the lower end of the free telescopic shift component 6 is in contact or gap arrangement with the surface of the lower pole plate 4, and the lower end of the displacement electrode 11 at the lower end of the free telescopic shift component 6 is in contact or gap arrangement with the tip of the grounding electrode 10, and in the embodiment, the lower end of the displacement electrode 11 is in contact with the tip of the grounding electrode 10.

[0028] Embodiment four, in combinationFigure 4 A displacement electrode 11 is arranged at the lower end of the grounding electrode 10, and a displacement plate 12 is arranged horizontally at the lower end of the displacement electrode 11.

[0029] In the embodiment five, the displacement electrode 11 is arranged at the lower end of the grounding electrode 10, and the displacement plate 12 is arranged horizontally at the lower end of the displacement electrode 11. Figure 5 In the embodiment five, the displacement electrode 11 is arranged at the lower end of the grounding electrode 10, and the displacement plate 12 is arranged horizontally at the lower end of the displacement electrode 11.

[0030] In the embodiment six, the displacement electrode 11 is arranged at the lower end of the grounding electrode 10, and the displacement plate 12 is arranged horizontally at the lower end of the displacement electrode 11. Figures 1 to 5 The arc extinguishing method of the liquid-electric effect dynamic displacement arc extinguishing structure comprises the following steps.

[0031] Before lightning, the electric arc extinguishing channel is established by the lightning electrode 2, the upper plate 3, the free telescopic displacement assembly 6, the lower plate 4 and the screw rod 5 in the inner cavity of the insulating shell 1, and the free telescopic displacement assembly 6 is a temperature-sensitive spring;

[0032] When lightning occurs, the impact voltage breaks the outer air gap above the lightning electrode 2, and the impact current and the power frequency current enter the electric arc extinguishing channel formed by the telescopic displacement assembly 6 composed of temperature-sensitive springs in the insulating shell 1 from the lightning electrode 2, and the temperature of the temperature-sensitive spring is increased when the current passes through the free telescopic displacement assembly 6, the impact current and the power frequency current are discharged in the insulating liquid 7 gap, the initial liquid-electric effect is triggered, the free telescopic displacement assembly 6 starts to contract and move upwards, the initial insulating liquid gap is generated between the lower end of the free telescopic displacement assembly 6 and the lower plate 4, the insulating liquid gap is suddenly increased, so that the length of the discharge arc is instantaneously lengthened, the high-intensity liquid-electric effect pressure acts on the surface of the long arc, the full-scale arc break is formed, and the impact current and the power frequency current are forced to extinguish. In the utility model, for the gap setting structure: the free telescopic displacement assembly 6 (temperature-sensitive spring) and the lower plate 4 (or the grounding electrode 10) or the displacement electrode 11 on the free telescopic displacement assembly 6 (temperature-sensitive spring) and the lower plate 4 are in a gap setting state, when lightning occurs, the free telescopic displacement assembly 6 (temperature-sensitive spring) and the lower plate 4 are in a gap setting state, the impact voltage breaks the outer air gap above the lightning electrode 2, the impact current and the power frequency current pass through the initial insulating liquid gap between the lightning electrode 2, the free telescopic displacement assembly 6 (temperature-sensitive spring), the displacement electrode 11 and the lower plate 4 (or the grounding electrode 10), and are discharged in the initial insulating liquid gap, the initial liquid-electric effect is triggered, and the initial liquid-electric effect pressure is generated.

[0033] For the contact setting structure: in the utility model, the free telescopic displacement component 6 (temperature sensitive spring) and the lower pole plate 4 (or ground electrode 10) or the displacement electrode 11 on the free telescopic displacement component 6 (temperature sensitive spring) and the lower pole plate 4 are in contact setting state, the impulse current and the power frequency current are accessed from the outer air gap above the lightning arrester electrode 2, enter the arc extinguishing channel formed by the telescopic displacement component 6 composed of temperature sensitive spring in the insulation shell 1 through the lightning arrester electrode 2, when the impulse current and the power frequency current pass through the free telescopic displacement component 6 (temperature sensitive spring), the temperature of the free telescopic displacement component 6 (temperature sensitive spring) rises, the free telescopic displacement component 6 (temperature sensitive spring) starts to shrink and moves up and drives the displacement electrode 11 to move up synchronously, so that the initial insulation liquid gap is formed between the displacement electrode 11 on the free telescopic displacement component 6 (temperature sensitive spring) and the lower pole plate 4 (or ground electrode 10);The current discharges in the initial insulation liquid gap, triggers the initial liquid electric effect, and generates the initial liquid electric effect pressure.

[0034] The effect of the liquid electric effect dynamic forced arc extinguishing chamber is that the temperature rise caused by the impulse current flowing through the temperature sensitive spring makes the temperature sensitive spring shrink to generate the initial liquid electric effect, the liquid electric effect pressure drives the displacement electrode 11 at the front end of the temperature sensitive spring to displace synchronously, lengthens the electric arc and generates the dynamic liquid electric effect pressure in the insulation shell 1 that increases with the lengthening of the electric arc, the liquid electric effect pressure acts on the full-scale electric arc surface, the gap between the displacement electrode 11 immersed in the insulation liquid 7 and the ground electrode 10 generates the full-scale electric arc break and forcibly extinguishes the power frequency follow current arc, the breakdown voltage of the electric arc break is improved from two dimensions of the full-scale long electric arc break and the liquid electric effect pressure, and the strong arc restriking effect is realized.

[0035] Therefore, since the lower end static short-circuit gap contact resistance of the free telescopic displacement component 6 is large, the impulse current will generate a huge field strength to break the liquid and produce spark arc discharge, the expansion force of the electric arc and the liquid electric effect pressure drive the displacement electrode to jump displacement, so that the following arc extinguishing process is realized:

[0036] (1), due to the influence of the short-circuit gap activated liquid electric effect mechanism, the displacement electrode is driven to move up quickly by the arc expansion force and the liquid electric effect pressure, the dynamic liquid electric effect pressure is large, and the high voltage forced arc extinguishing requirement is met.

[0037] (2), short-circuit gap activated liquid electric effect mechanism influence, through the arc expansion force and liquid electric effect pressure jointly driven displacement electrode jump rapid up, displacement electrode initial rising stage due to temperature sensitive damping force is small, its displacement speed is fast, under the condition of lower voltage to meet the requirements of forced arc extinguishing; the subsequent rising of the displacement electrode is affected by the temperature sensitive (thermal sensitive) spring damping; the speed of the displacement electrode back to the original position is affected by the elastic force of the spring, which can quickly recover the insulation coordination.

[0038] (3), short-circuit gap activated liquid electric effect mechanism influence, through the arc expansion force, liquid electric effect pressure and temperature sensitive spring expansion and contraction force jointly drive the displacement electrode to move up quickly; first, the arc collision force drives the displacement electrode to jump and accelerate; second, the liquid electric effect pressure drives the displacement electrode to accelerate; finally, the temperature sensitive (thermal sensitive) spring contraction force drives the displacement electrode to accelerate upward displacement; the high specific heat capacity liquid can quickly cool the temperature sensitive (thermal sensitive) spring, so that the spring can quickly reset the short-circuit gap and recover the insulation coordination requirement.

[0039] Example seven, in combination Figure 5 As shown in the liquid electric effect dynamic displacement arc extinguishing structure is applied to the surge suppressor, the surge suppressor contains any one of the displacement arc extinguishing structure in example one to example five, the surge suppressor includes an insulating shell 1, a lightning electrode 2, a lower plate 4 and a free telescopic displacement assembly 6 vertically arranged in the cavity of the insulating shell 1, the cavity of the insulating shell 1 is sealed and filled with insulating liquid 7, the top of the insulating shell 1 is vertically provided with the lightning electrode 2, the inside of the cavity of the insulating shell 1 is horizontally fixedly provided with the upper plate 3, the bottom of the insulating shell 1 is horizontally provided with the lower plate 4, the bottom of the insulating shell 1 is vertically provided with the screw rod 5, the upper end of the screw rod 5 vertically extends into the bottom of the cavity of the insulating shell 1 and is connected with the lower surface of the lower plate 4, the lower end of the free telescopic displacement assembly 6 vertically extends to above the lower plate 4 and is in contact with or is provided with a gap with the upper surface of the lower plate 4, the inside of the cavity of the insulating shell 1 is horizontally fixedly provided with the partition plate 9 in the clamping cavity 8 at the top, a plurality of layers of discharge electrode plates 14 are evenly and layer by layer arranged in the clamping cavity 8 between the partition plate 9 and the upper plate 3, the upper end of the free telescopic displacement assembly 6 extends into the clamping cavity 8 and is connected with the lower surface of the partition plate 9, the adjacent each layer of discharge electrode plates 14 has uniform electric field air gap 120, the height of the electric field air gap 120 is 0.1mm-1mm; the discharge electrode plate 14 is a graphite sheet or a metal oxide plate, the free telescopic displacement assembly 6 is a temperature sensitive spring.

[0040] Example eight, in combination Figure 5As shown, the liquid-electric effect dynamic displacement arc extinguishing structure is applied to the surge suppressor, the surge suppressor comprises an insulating shell 1, a lightning electrode 2, a lower electrode plate 4 and a free telescopic displacement assembly 6 vertically arranged in the cavity of the insulating shell 1, and the cavity of the insulating shell 1 is filled with insulating liquid 7; the lightning electrode 2 is vertically arranged at the top end of the insulating shell 1, the lower end of the lightning electrode 2 extends into the insulating shell 1 and is electrically connected with the upper end of the free telescopic displacement assembly 6, the lower electrode plate 4 is horizontally arranged in the bottom end of the insulating shell 1, a screw rod 5 is vertically arranged at the bottom end of the insulating shell 1, the upper end of the screw rod 5 extends into the bottom end of the cavity of the insulating shell 1 and is connected with the lower surface of the lower electrode plate 4, the lower end of the free telescopic displacement assembly 6 extends vertically downwards to above the lower electrode plate 4 and is in contact with or is arranged with a gap on the upper surface of the lower electrode plate 4, in the utility model, the upper electrode plate 3 is horizontally fixedly arranged at the top end of the cavity of the insulating shell 1, the lower end of the lightning electrode 2 extends into the insulating shell 1 and is fixedly connected with the upper surface of the upper electrode plate 3, the displacement electrode 11 is arranged at the lower end of the free telescopic displacement assembly 6, the grounding electrode 10 is vertically fixedly arranged on the upper surface of the lower electrode plate 4, and the lower end of the displacement electrode 11 is in contact with or is arranged with a gap on the tip of the grounding electrode 10.

[0041] In the utility model embodiment, a clamping cavity 8 in communication with each other is arranged between the lower end of the lightning electrode 2 and the top end of the cavity of the insulating shell 1, the diameter of the clamping cavity 8 is smaller than the cavity diameter of the insulating shell 1, the upper electrode plate 3 is horizontally fixedly arranged at the top end of the clamping cavity 8, the lower end of the lightning electrode 2 extends into the top end of the clamping cavity 8 and is connected with the upper surface of the upper electrode plate 3 in the middle, the upper end of the free telescopic displacement assembly 6 is arranged in the clamping cavity 8, and the upper end of the free telescopic displacement assembly 6 is connected with the lower surface of the upper electrode plate 3; the partition electrode plate 9 is horizontally fixedly arranged in the clamping cavity 8 above the top end of the cavity of the insulating shell 1, a plurality of discharge electrode plates 14 are arranged in the clamping cavity 8 between the partition electrode plate 9 and the upper electrode plate 3 and are uniformly and layer by layer arranged, the upper end of the free telescopic displacement assembly 6 extends into the clamping cavity 8 and is connected with the lower surface of the upper electrode plate 3; each adjacent layer of discharge electrode plates 14 has a uniform electric field air gap 120, the height of the electric field air gap 120 is 0.1mm-1mm; the discharge electrode plate 14 is a graphite sheet or a metal oxide plate, the free telescopic displacement assembly 6 is a temperature-sensitive spring, the outer wall of the insulating shell 1 has a skirt or is not provided with a skirt; the electric field air gap 120 can control the impulse breakdown voltage and realize insulation cooperation.

[0042] In the utility model embodiment, the upper end of the lightning -arresting electrode 2 is connected to the upper pole plate 3 inside the top end of the sealed protective shell body 100, the lower end of the sealed protective shell body 100 is fixed on the surface of the lower pole plate 4, and the upper pole plate 3, the discharge electrode plate 14, the partition pole plate 9, the free telescopic displacement assembly 6, the displacement electrode 11 and the grounding electrode 10 form an arc extinguishing channel arranged in the sealed protective shell body 100. When the surge suppressor is used, a uniform and mutually series electric field air gap 120 is formed between the discharge electrode plate 14 (graphite sheet), so that the dynamic forced arc extinguishing structure of liquid electric effect and the uniform electric field air gap are reformed into a series structure. When the impulse current and the power frequency current pass through the free telescopic displacement assembly, the temperature rise caused by the impulse current and the power frequency current makes the temperature-sensitive spring contract to generate an initial arc liquid electric effect, drives the temperature-sensitive spring front end displacement electrode 11 and the temperature-sensitive spring to displace simultaneously, lengthens the electric arc and generates a dynamic liquid electric effect pressure that increases with the lengthening of the electric arc, and the liquid electric effect pressure acts on the full-scale electric arc surface to generate a full-scale electric arc break in the liquid gap and forcibly extinguish the power frequency continuous current arc. The full-scale long electric arc break and the liquid electric effect pressure improve the dielectric breakdown field strength, thereby improving the breakdown voltage of the electric arc break from two dimensions to realize the strong arc reignition suppression effect. Since the operating voltage of the surge suppressor is low, generally hundreds of volts to thousands of volts, and the operating environment is in a waterproof cabinet indoors or outdoors, the external insulation will not be eroded and affected by rainwater, and the insulation requirement can be met without increasing the external insulation creepage distance, so that the insulation shell 1 can adopt a skirtless structure, the free telescopic displacement assembly 6 (temperature-sensitive spring) short-circuits the liquid gap to make the impulse breakdown voltage of the liquid electric effect arc extinguishing chamber zero. The breakdown voltage and power frequency withstand voltage of the arc extinguishing channel are determined by the breakdown voltage of the series external air gap. Under the condition of power frequency voltage, the electric field air gap 120 between the discharge electrode plate 14 (graphite sheet) is in an open circuit state and bears the entire power frequency voltage, and the liquid electric arc extinguishing chamber in a short circuit state will not cause power frequency short circuit. The entire arc extinguishing channel is in an open circuit state. Under the action of lightning voltage, the electric field air gap 120 between the discharge electrode plate 14 (graphite sheet) is preferentially broken down through insulation cooperation, plays a role of limiting amplitude and transferring lightning charge. At the same time, when the impulse current and the power frequency current flow through the discharge electrode plate 14 (graphite sheet) and the free telescopic displacement assembly 6 (temperature-sensitive spring) in series with the discharge electrode plate 14 (graphite sheet), the free telescopic displacement assembly 6 (temperature-sensitive spring) contracts and changes the distance, generates an impulse arc and a liquid electric effect pressure, forcibly extinguishes the power frequency continuous current, and forms the effects of limiting amplitude, transferring charge and forcibly extinguishing arc. The safety accidents of long current duration, high temperature rise causing insulation combustion, long time short circuit current electric power causing transformer winding distortion, wire melting and long time power outage caused by the fact that the existing surge suppressor has no forced arc extinguishing capability are solved.

[0043] The above merely is preferred implementation manner of the present application, it should be pointed out, for ordinary skilled person in the technical field, on the premise of not departing from the principle of the present application, can also make several improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the present application.

Claims

1. A liquid electro- effect dynamic shift arc extinguishing structure, characterized in that: The shifting arc-extinguishing structure comprises an insulating shell (1), a lightning electrode (2), a lower electrode plate (4), and a free telescopic shifting component (6) vertically arranged in the cavity of the insulating shell (1), and the cavity of the insulating shell (1) is filled with insulating liquid (7); The lightning electrode (2) is vertically arranged at the top end of the insulating shell (1), the lower end of the lightning electrode (2) extends into the insulating shell (1) and is electrically connected with the upper end of the free telescopic shifting component (6), the lower electrode plate (4) is horizontally arranged inside the bottom end of the insulating shell (1), a screw rod (5) is vertically arranged at the bottom end of the insulating shell (1), the upper end of the screw rod (5) extends into the bottom end of the cavity of the insulating shell (1) and is connected with the lower surface of the lower electrode plate (4), the lower end of the free telescopic shifting component (6) extends vertically downward above the lower electrode plate (4) and is in contact with or is spaced apart from the upper surface of the lower electrode plate (4).

2. A hydrodynamic dynamic displacement arc extinguishing structure according to claim 1, characterized in that: A grounding electrode (10) is vertically fixed on the upper surface of the lower electrode plate (4), a shifting electrode (11) is arranged at the lower end of the free telescopic shifting component (6), and the lower end of the shifting electrode (11) is in contact with or is spaced apart from the tip of the grounding electrode (10).

3. A hydrodynamic dynamic displacement arc extinguishing structure according to claim 2, characterized in that: A shifting electrode plate (12) is horizontally arranged at the lower end of the shifting electrode (11), and the surface center of the shifting electrode plate (12) is in contact with or is spaced apart from the tip of the grounding electrode (10).

4. A hydrodynamic dynamic displacement arc extinguishing structure according to claim 1, characterized in that: An upper electrode plate (3) is horizontally fixed at the top end inside the cavity of the insulating shell (1), the lower end of the lightning electrode (2) extends into the insulating shell (1) and is fixedly connected with the upper surface of the upper electrode plate (3), and the lower surface of the upper electrode plate (3) is electrically connected with the upper end of the free telescopic shifting component (6).

5. A hydrodynamic dynamic displacement arc extinguishing structure according to any one of claims 1 to 4, characterized in that: A clamping cavity (8) is arranged between the lower end of the lightning electrode (2) and the top end inside the cavity of the insulating shell (1), the diameter of the clamping cavity (8) is smaller than the diameter of the cavity of the insulating shell (1), the upper electrode plate (3) is horizontally fixed at the top end of the clamping cavity (8), the lower end of the lightning electrode (2) extends into the top end of the clamping cavity (8) and is connected with the central upper surface of the upper electrode plate (3), the upper end of the free telescopic shifting component (6) is partially arranged in the clamping cavity (8), and the upper end of the free telescopic shifting component (6) is connected with the lower surface of the upper electrode plate (3).

6. A hydrodynamic dynamic displacement arc extinguishing structure according to claim 5, characterized in that: A partition electrode plate (9) is horizontally fixed in the clamping cavity (8) above the top end inside the cavity of the insulating shell (1), a plurality of discharge electrode plates (14) are arranged in the clamping cavity (8) between the partition electrode plate (9) and the upper electrode plate (3), the upper end of the free telescopic shifting component (6) extends into the clamping cavity (8) and is connected with the lower surface of the partition electrode plate (9), and the lower end of the free telescopic shifting component (6) extends vertically downward above the lower electrode plate (4) and is in contact with or is spaced apart from the upper surface of the lower electrode plate (4).

7. A hydrodynamic dynamic displacement arc extinguishing structure according to claim 6, characterized in that: The adjacent discharge electrode plates (14) have uniform electric field air gaps (120) with a height of 0.1mm-1mm between them; the discharge electrode plates (14) are graphite plates or metal oxide electrode plates.

8. A hydrodynamic dynamic displacement arc extinguishing structure according to claims 1 to 7, characterized in that: The free expansion displacement component (6) is a temperature-sensitive spring, and a skirt (13) is arranged on the outer wall of the insulating shell (1).

9. A surge suppressor comprising the displacement arc extinguishing structure of any one of claims 1 to 8, characterized in that, The displacement arc extinguishing structure comprises an insulating shell (1), a lightning receiving electrode (2), a lower electrode plate (4), and a free expansion displacement component (6) vertically arranged in the cavity of the insulating shell (1), the cavity of the insulating shell (1) is filled with an insulating liquid (7), the lightning receiving electrode (2) is vertically arranged at the top end of the insulating shell (1), the upper electrode plate (3) is horizontally fixed at the top end inside the cavity of the insulating shell (1), the lower electrode plate (4) is horizontally arranged at the bottom end inside the insulating shell (1), the screw rod (5) is vertically arranged at the bottom end outside the insulating shell (1), the upper end of the screw rod (5) vertically extends into the bottom end of the cavity of the insulating shell (1) and is connected with the lower surface of the lower electrode plate (4), the lower end of the free expansion displacement component (6) vertically extends above the lower electrode plate (4) and is in contact with or is arranged with a gap from the upper surface of the lower electrode plate (4), the partition electrode plate (9) is horizontally fixed in the clamping cavity (8) above the top end inside the cavity of the insulating shell (1), the multiple layers of discharge electrode plates (14) are uniformly and layer by layer arranged in the clamping cavity (8) between the partition electrode plate (9) and the upper electrode plate (3), and the upper end of the free expansion displacement component (6) extends into the clamping cavity (8) and is connected with the lower surface of the partition electrode plate (9).

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