Annular piezoresistor disc for lightning arrester

Abstract

The utility model relates to the technical field of lightning arrester electronic accessories, in particular to an annular piezoresistor disc for a lightning arrester, which comprises a heat dissipation type annular piezoresistor, the heat dissipation type annular piezoresistor comprises a resin insulation outer layer, an electrode layer, a zinc oxide ceramic body, a carbon-free insulation tube and an insulation sealant, the resin insulating outer layer is sleeved on the outer side of the zinc oxide ceramic body, the electrode layer is fixedly connected to the top end of the zinc oxide ceramic body, the carbon-free insulating tube is sleeved on the outer side of the zinc oxide ceramic body, and the insulating sealant is coated on the opposite sides of the electrode layer and the zinc oxide ceramic body. The zinc oxide ceramic body has good high temperature resistance, corrosion resistance and stability; the resin insulation outer layer ensures insulation, and meanwhile, the heat dissipation efficiency is enhanced through a plurality of groups of heat dissipation holes formed in the outer side.

Description

Technical Field

[0001] The present application relates to the technical field of electronic accessories for lightning arresters, and in particular to an annular varistor sheet for lightning arresters. Background Art

[0002] Lightning arrester is a kind of electrical device used to protect electrical equipment from high transient overvoltage and limit the follow-up time and often limit the follow-up value. Lightning arrester is usually connected between the grid conductor and the ground wire, but sometimes it is also connected beside the electrical winding or between the conductors.

[0003] After searching, the announcement number: CN206947082U announced a ring-shaped varistor for insulator lightning arresters, in which the contact area between the outer electrode and the end face of the substrate is 20%-40%; the outer surface of the outer electrode is designed to be an arc structure to improve the outer electrode's tolerance to welding and the firmness of the solder joint; the inner electrode and the end face of the substrate are designed to have a contact area of ​​60%-80%, so that the edge of the outer electrode can contact the end face of the substrate and the inner electrode is completely covered to prevent the inner electrode from being exposed to the air and oxidized to affect its electrical properties.

[0004] With respect to the above-mentioned related technologies, the inventor believes that there are the following technical defects that need to be improved:

[0005] When producing traditional varistors, if the ratio of ceramic particles and conductive binder is improper or the mixing is uneven, local hot spots will occur in the varistors after sintering, resulting in heating. The heat dissipation effect of traditional varistors is general, and long-term use will reduce the service life of annular varistors. Utility Model Content

[0006] The present application provides a ring varistor for a lightning arrester to improve the following technical problems:

[0007] When producing traditional varistors, if the ratio of ceramic particles and conductive binder is improper or the mixing is uneven, local hot spots will occur in the varistors after sintering, resulting in heating. The heat dissipation effect of traditional varistors is general, and long-term use will reduce the service life of annular varistors.

[0008] The present application provides a ring varistor for a lightning arrester, which adopts the following technical solution:

[0009] A ring-shaped varistor sheet for a lightning arrester comprises a heat dissipation type ring-shaped varistor, wherein the heat dissipation type ring-shaped varistor comprises a resin insulating outer layer, an electrode layer, a zinc oxide ceramic body, a carbon-free insulating tube and an insulating sealant, wherein the resin insulating outer layer is sleeved on the outer side of the zinc oxide ceramic body, the electrode layer is fixedly connected to the top end of the zinc oxide ceramic body, the carbon-free insulating tube is sleeved on the outer side of the zinc oxide ceramic body, and the insulating sealant is coated on the electrode layer and the opposite sides of the zinc oxide ceramic body.

[0010] In a feasible technical solution of the present application, the carbon-free insulating tubes are provided in a plurality of groups, and the plurality of groups of the carbon-free insulating tubes are arranged in an annular array on the outside of the zinc oxide ceramic body.

[0011] In a feasible technical solution of the present application, the interior of the carbon-free insulating tube is also coated with an acrylic waterproof film.

[0012] In a feasible technical solution of the present application, a tinned pin is welded and fixed to the outer side of the zinc oxide ceramic body.

[0013] In an achievable technical solution of the present application, a plurality of groups of heat dissipation holes in an annular array are formed through the top of the resin insulating outer layer.

[0014] In a feasible technical solution of the present application, the electrode layer is a silver electrode, and the electrode layer is a fan-shaped structure with equal cross-sectional areas.

[0015] In a feasible technical solution of the present application, the middle part of the zinc oxide ceramic body is configured as a hollow structure.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. The zinc oxide ceramic body of this product has good high temperature resistance, corrosion resistance and stability; the middle part of its appearance is a hollow structure, which has low self-inductance and self-coupling effect, and will not generate electromagnetic interference when current passes through; while the structure of ordinary resistors is solid, which will produce certain self-inductance and self-coupling effects, so that the heat dissipation annular varistor can show good performance in high and low temperature environments; in order to prevent poor adhesion between metal electrodes and ceramic particles, this product is coated with insulating sealant at the interface between the electrode layer and the zinc oxide ceramic body to enhance the tightness of the connection and improve the performance of the varistor;

[0018] 2. The tin-plated pins protect the metal from oxidation and enhance the conductivity. The silver electrode layer of the fan-shaped structure is made of the same material and has a small cross-sectional area, which increases the resistance and protects the circuit components. The resin insulating outer layer ensures insulation while enhancing the heat dissipation efficiency through multiple sets of heat dissipation holes opened on the outside. At the same time, the carbon-free insulating tube has good high temperature resistance and corrosion resistance, which can effectively prevent current leakage and has a certain cooling effect. The multiple sets of carbon-free insulating tubes wrapped around the outside of the zinc oxide ceramic body can enhance the overall heat dissipation effect, and the internal acrylic waterproof film can effectively prevent water from accumulating in the tube and causing damage to the varistor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the structure of an annular varistor sheet for a lightning arrester according to an embodiment of the present application.

[0021] Figure 2 It is a cross-sectional view of the outer layer of the resin insulation of the embodiment of the present application.

[0022] Figure 3 It is a distribution diagram of the electrode layer and the insulating sealant in the embodiment of the present application.

[0023] Figure 4 This is a cross-sectional rendering of the carbon-free insulation tube according to an embodiment of the present application.

[0024] Description of reference numerals:

[0025] 1. Heat dissipation annular varistor; 2. Acrylic waterproof film; 3. Tinned pins; 4. Heat dissipation holes; 11. Resin insulation outer layer; 12. Electrode layer; 13. Zinc oxide ceramic body; 14. Carbon-free insulation tube; 15. Insulation sealant. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] The following is combined with Figure 1-4 This application is described in further detail.

[0031] The present application embodiment discloses a ring-shaped varistor for a lightning arrester. Figures 1 to 4 The annular varistor sheet for lightning arrester includes a heat dissipation annular varistor 1, which includes a resin insulating outer layer 11, an electrode layer 12, a zinc oxide ceramic body 13, a carbon-free insulating tube 14 and an insulating sealant 15. The resin insulating outer layer 11 is sleeved on the outer side of the zinc oxide ceramic body 13, the electrode layer 12 is fixedly connected to the top of the zinc oxide ceramic body 13, the carbon-free insulating tube 14 is sleeved on the outer side of the zinc oxide ceramic body 13, and the insulating sealant 15 is coated on the opposite sides of the electrode layer 12 and the zinc oxide ceramic body 13.

[0032] Several groups of carbon-free insulating tubes 14 are provided, and the groups of carbon-free insulating tubes 14 are arranged in a circular array outside the zinc oxide ceramic body 13 .

[0033] The interior of the carbon-free insulation pipe 14 is also coated with an acrylic waterproof membrane 2 .

[0034] A tinned pin 3 is also welded and fixed to the outer side of the zinc oxide ceramic body 13 .

[0035] A plurality of heat dissipation holes 4 in an annular array are formed through the top of the resin insulating outer layer 11 .

[0036] The electrode layer 12 is a silver electrode, and the electrode layer 12 is a fan-shaped structure with equal cross-sectional areas.

[0037] The middle part of the zinc oxide ceramic body 13 is configured as a hollow structure.

[0038] The use process of the annular varistor for the lightning arrester in the embodiment of the present application is roughly as follows:

[0039] The zinc oxide ceramic body 13 has good high temperature resistance, corrosion resistance and stability; the middle part of its appearance is a hollow structure, which has low self-inductance and self-coupling effect, and will not generate electromagnetic interference when current passes through; the structure of ordinary resistors is solid, which will produce certain self-inductance and self-coupling effects, so that the heat dissipation annular varistor 1 can show good performance in high and low temperature environments; the tin-plated pins 3 are connected to the power supply, and this structure protects the metal from oxidation and enhances the conductivity. The silver electrode layer 12 of the fan-shaped structure is made of the same material and has a small cross-sectional area, thereby increasing the resistance and protecting the circuit components; the resin insulating outer layer 11 ensures insulation while enhancing the heat dissipation efficiency through multiple groups of heat dissipation holes 4 opened on the outside.

[0040] The beneficial technical effects of the annular varistor for lightning arrester of the embodiment of the present application are roughly as follows:

[0041] The middle part of the zinc oxide ceramic body 13 is a hollow structure, which has low self-inductance and self-coupling effect, and will not generate electromagnetic interference when current passes through; the structure of ordinary resistors is solid, which will produce certain self-inductance and self-coupling effect, so that the heat dissipation annular varistor 1 can show good performance in high and low temperature environments; in order to prevent poor adhesion between the metal electrode and the ceramic particles, the product is coated with insulating sealant 15 at the interface between the electrode layer 12 and the zinc oxide ceramic body 13 to enhance the tightness of the connection and improve the performance of the varistor; the carbon-free insulating tube 14 has good high temperature resistance and The corrosion resistance can effectively prevent the leakage of current and has a certain cooling effect. The multiple groups of carbon-free insulating tubes 14 wrapped on the outside of the zinc oxide ceramic body 13 can enhance the overall heat dissipation effect, and the internal acrylic waterproof film 2 can effectively prevent water from accumulating in the tube and causing damage to the varistor; the tin-plated pins 3 protect the metal from oxidation and enhance the conductivity. The silver electrode layer 12 of the fan-shaped structure is made of the same material and has a small cross-sectional area, thereby increasing the resistance and protecting the circuit components; the resin insulating outer layer 11 ensures insulation while enhancing the heat dissipation efficiency through the multiple groups of heat dissipation holes 4 opened on the outside.

[0042] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the application should be included in the protection scope of the present application.

Claims

1. A ring varistor for a lightning arrester, characterized in that: The invention comprises a heat dissipation annular varistor (1), wherein the heat dissipation annular varistor (1) comprises a resin insulating outer layer (11), an electrode layer (12), a zinc oxide ceramic body (13), a carbon-free insulating tube (14) and an insulating sealant (15), wherein the resin insulating outer layer (11) is sleeved on the outer side of the zinc oxide ceramic body (13), the electrode layer (12) is fixedly connected to the top of the zinc oxide ceramic body (13), the carbon-free insulating tube (14) is sleeved on the outer side of the zinc oxide ceramic body (13), and the insulating sealant (15) is applied on the opposite sides of the electrode layer (12) and the zinc oxide ceramic body (13).

2. The annular varistor sheet for lightning arrester according to claim 1, characterized in that: The carbon-free insulation tubes (14) are provided in a plurality of groups, and the plurality of groups of the carbon-free insulation tubes (14) are arranged in an annular array on the outside of the zinc oxide ceramic body (13).

3. The annular varistor sheet for lightning arrester according to claim 2, characterized in that: The interior of the carbon-free insulation pipe (14) is also coated with an acrylic waterproof membrane (2).

4. The annular varistor sheet for lightning arrester according to claim 1, characterized in that: A tinned pin (3) is also welded and fixed to the outer side of the zinc oxide ceramic body (13).

5. The annular varistor sheet for lightning arrester according to claim 1, characterized in that: A plurality of groups of heat dissipation holes (4) in an annular array are provided through the top of the resin insulation outer layer (11).

6. The annular varistor sheet for lightning arrester according to claim 1, characterized in that: The electrode layer (12) is a silver electrode, and the electrode layer (12) is a fan-shaped structure with equal cross-sectional areas.

7. The annular varistor sheet for lightning arrester according to claim 1, characterized in that: The middle part of the zinc oxide ceramic body (13) is arranged as a hollow structure.

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