High-energy zinc oxide resistor and monolith thereof

Abstract

The utility model relates to a kind of high-energy zinc oxide resistor and its monomer, including packaging assembly and several zinc oxide resistor disc, packaging assembly includes the two metal electrode guide plates and rubber insulating plate of laminated arrangement, metal electrode guide plate includes main plate body and the ear plate for electrical connection protruding in main plate body side, the ear plate for electrical connection of two metal electrode guide plates transverse staggered arrangement, rubber insulating plate is clamped between two metal electrode guide plates, rubber insulating plate four around protrude the main plate body rim of metal electrode guide plate, two metal electrode plate is locked connection by insulating component, it is equipped with several positioning hole cavities on middle rubber insulating plate, zinc oxide resistor disc is placed in positioning hole cavity, and elastic conducting part is equipped on the both sides of zinc oxide resistor disc, zinc oxide resistor disc is electrically connected with metal electrode guide plate by elastic conducting part, at least on the outward end face of one metal electrode guide plate covers insulating isolation plate. Provide high-performance resistor monomer in flat plate shape, with the advantages of stable and reliable structure.

Description

Technical Field

[0001] This utility model relates to high-energy zinc oxide resistors. Background Technology

[0002] High-energy zinc oxide resistors possess advantages such as absorbing and dissipating large amounts of transient overvoltage energy, excellent nonlinear characteristics, and fast response speed, providing crucial safety guarantees for power equipment and systems. High-energy zinc oxide resistors are composed of multiple individual units. To improve the performance of each unit, multiple zinc oxide varistors are typically connected in parallel within a single unit. However, existing high-energy zinc oxide resistors usually have a columnar structure, limiting their application scenarios. Therefore, providing a high-energy zinc oxide resistor unit with a structure different from the traditional one is a topic that needs to be discussed here. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects of the existing technology by providing a high-energy zinc oxide resistor unit that is flat and high-performance, while also having the advantages of stable and reliable structure.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A high-energy zinc oxide resistor unit includes an encapsulation assembly and a plurality of zinc oxide resistive sheets encapsulated within the encapsulation assembly. The encapsulation assembly comprises two stacked metal electrode plates and a rubber insulating plate. Each metal electrode plate includes a main body and an electrical connection lug protruding from one side of the main body. The electrical connection lugs of the two metal electrode plates are laterally staggered. The rubber insulating plate is sandwiched between the two metal electrode plates, extending beyond the edges of the main body of the metal electrode plates. The two metal electrode plates are locked together by an insulating component. The rubber insulating plate has a plurality of positioning cavities. The zinc oxide resistive sheets are placed within these positioning cavities. Elastic conductive elements are provided on both sides of each zinc oxide resistive sheet, and the zinc oxide resistive sheets are electrically connected to the metal electrode plates via these elastic conductive elements. An insulating isolation plate covers the outward-facing end face of at least one metal electrode plate.

[0006] Preferably, the rubber insulating board includes two stacked rubber sheets, and the two rubber sheets are provided with a plurality of stepped cavities that correspond to each other to form a plurality of positioning cavities. Each stepped cavity includes a small-diameter cavity and a large-diameter cavity with an annular bottom wall. One end face of the corresponding large-diameter cavity opening of the two rubber sheets is attached to each other, and the zinc oxide resistor sheet is embedded in the large-diameter cavity of the two rubber sheets.

[0007] Preferably, the two rubber plates have sealing ribs that surround the edge of the large-diameter hole, and after the two rubber plates are stacked, the sealing ribs at the edge of the large port of the stepped cavity make contact and seal.

[0008] Preferably, the insulating component includes several connecting bolts made of insulating material, and a through hole is provided on the rubber insulating plate for the connecting bolts to pass through. The main body of the two metal electrode guide plates is fixedly connected by the connecting bolts.

[0009] Preferably, the insulating barrier is a rubber insulating baffle that is fastened to the main body of the metal electrode guide plate on one side. The rubber insulating baffle includes a rubber panel, and a fastening groove is formed by protruding fastening edges on the rubber panel. The fastening groove has a notch for the extension of the ear plate for power supply connection. The main body of the metal electrode guide plate is inserted into the fastening groove, and the rubber panel has a periphery that extends out of the main body of the metal electrode guide plate.

[0010] Preferably, the rubber panel has a plurality of supporting protrusions protruding outwards, and the outer convex top surface of the supporting protrusions is a contact support surface that contacts and supports external devices.

[0011] Preferably, the rubber panel has an outwardly inclined portion on one side corresponding to the position of the ear plate for electrical connection, which is tilted and raised towards the side away from the ear plate for electrical connection, and one side of the periphery is formed on the raised side of the outwardly inclined portion.

[0012] Preferably, the elastic conductive element is a spring sheet.

[0013] Preferably, the spring is claw-shaped, and the spring includes a first piece that abuts against the metal electrode plate and a second piece that abuts against the zinc oxide resistor piece, with a plurality of first pieces distributed circumferentially at intervals on the second piece.

[0014] By adopting the above technical solution, the resistor unit adopts a plate-like structure, with multiple zinc oxide resistance sheets laid flat between two metal electrode plates. This achieves high performance in the resistor unit, including significant energy absorption and peak current tolerance. The zinc oxide resistance sheets are embedded in a rubber insulating plate, which positions and protects them, providing excellent sealing and cushioning to prevent damage from vibration. Furthermore, the zinc oxide resistance sheets achieve a reliable conductive connection to the metal electrode plates via elastic conductive elements. The rubber insulating plate has a stacked design with two layers (rubber sheets). After lamination, two stepped cavities allow for convenient and reliable fixation of the zinc oxide resistance sheets. Additionally, the mating surface of the stepped cavities forms an annular sealing rib, achieving a more reliable seal for the zinc oxide resistance sheets. Moreover, the resistor unit employs a simpler and more reliable structural design. For example, connecting bolts are used to fix the two metal electrode plates. A rubber insulating baffle can be installed on one side of the metal electrode plate to isolate and protect the resistor unit from other components during installation and use.

[0015] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a perspective view of a single high-energy zinc oxide resistor of this utility model;

[0017] Figure 2 This is a top view of a single high-energy zinc oxide resistor of this utility model;

[0018] Figure 3 An exploded view of a single high-energy zinc oxide resistor of this utility model;

[0019] Figure 4 This is a structural diagram of the rubber insulating board and zinc oxide resistor sheet of this utility model in their assembled state;

[0020] Figure 5 for Figure 4 A sectional view cut along section AA.

[0021] Figure 6 for Figure 4 Exploded view of the component shown;

[0022] Figure 7 for Figure 6 A magnified view of part B in the middle section;

[0023] Figure 8 This is a schematic diagram of the structure of the elastic conductive component of this utility model;

[0024] Figure 9 This is a schematic diagram of the structure of the high-energy zinc oxide resistor of this utility model. Figure 1 ;

[0025] Figure 10 This is a schematic diagram of the structure of the high-energy zinc oxide resistor of this utility model. Figure 2 . Detailed Implementation

[0026] See appendix Figures 1-8This utility model discloses a high-energy zinc oxide resistor unit 1, including an encapsulation assembly and a plurality of zinc oxide resistive sheets 11 encapsulated within the encapsulation assembly. In this specific embodiment, there are 12 zinc oxide resistive sheets 11. The encapsulation assembly includes two stacked metal electrode guide plates 12 and a rubber insulating plate 13. The metal electrode guide plates 12 are made of aluminum plates and include a main body 121 and an electrical connection ear plate 122 protruding from one side of the main body 121. The electrical connection ear plates 122 of the two metal electrode guide plates 12 are arranged laterally in a staggered manner. The rubber insulating plate 13 is sandwiched between the two metal electrode guide plates 12. The rubber insulating plate 13 extends beyond the edge of the main body 121 of the metal electrode guide plate 12 around its perimeter, forming the edge shown in the figure. The sheet body 130 is designed to increase the creepage distance between the two metal electrode guide plates 12. The rubber insulating plate 13 has several positioning cavities 131, within which the zinc oxide resistor sheet 11 is placed. Elastic conductive elements 14 are provided on both sides of the zinc oxide resistor sheet 11, allowing it to be electrically connected to the metal electrode guide plates 12 via the elastic conductive elements 14. The two metal electrode plates 12 are locked together by insulating components. This encapsulates the zinc oxide resistor sheet 11 by clamping the rubber insulating plate 13 between the two metal electrode guide plates 12, and ensures a reliable conductive connection between the metal electrode guide plates 12 and the zinc oxide resistor sheet 11 via the elastic conductive elements 14. An insulating isolation plate 16 covers the outward-facing end face of at least one of the metal electrode guide plates 12. The insulating isolation plate 16 is used to isolate the resistor unit 1 from other components. For safety considerations when using the resistor unit, insulating rubber, such as silicone, is preferred for the insulating isolation plate. Furthermore, for the stacked structure, to achieve a compact design, a spring-loaded design is preferred for the elastic conductive elements.

[0027] To facilitate reliable encapsulation of the zinc oxide resistor 11, the rubber insulating plate 13 includes two stacked rubber plates 13-1. Each rubber plate 13-1 has a plurality of stepped cavities 13-11 that correspond to and cooperate with each other to form a plurality of positioning cavities 130. Each stepped cavity 13-11 includes a small-diameter hole a and a large-diameter hole b with an annular bottom wall. One end face of the corresponding large-diameter hole b of the two rubber plates 13-1 is fitted together. The zinc oxide resistor 11 is embedded in the large-diameter hole b of the two rubber plates 13-1. During assembly, the zinc oxide resistor 11 is first embedded in the large-diameter hole b of one rubber plate 13-1, and then the other rubber plate 13-1 is placed on top. The zinc oxide resistor 11 is confined within the cavity formed by the combination of the large-diameter holes of the two rubber plates 13-1 after they are fitted together. The zinc oxide resistor sheet can be reliably and conveniently positioned between two rubber plates. Simultaneously, this structure allows for convenient and reliable provision of space for the elastic conductive element through the small-diameter orifice a. Furthermore, the two rubber plates 13-1 have raised sealing ribs 13-12 that surround the edge of the large-diameter orifice b. When the two rubber plates 13-1 are stacked, the sealing ribs 13-12 at the edge of the large port of the stepped cavity 13-11 contact and seal. Figure 4 In the initial state where the two rubber sheets are not compressed or deformed, a gap is formed after the sealing ribs 13-12 contact. However, after the resistor unit is assembled, the two rubber sheets will be compressed and elastically deformed, thus the two rubber sheets will fit together under the extrusion force. After the two rubber sheets are clamped together, the contact of the sealing ribs on the two rubber sheets achieves a more reliable seal, providing better protection for the zinc oxide resistor sheet.

[0028] In one embodiment of this utility model, the insulating component includes several connecting bolts 151 made of insulating material. A through hole 132 is provided on the rubber insulating plate 13 for the connecting bolts 151 to pass through. The main body 121 of the two metal electrode guide plates 12 is fixedly connected by the connecting bolts 151. More specifically, one metal electrode guide plate 12 has a threaded hole 123, and the other metal electrode guide plate 12 has an insertion hole 124. The connecting bolt 151 is inserted into the insertion hole 124 of one metal electrode guide plate, passes through the through hole 132 of the rubber insulating plate 13, and is then threaded into the threaded hole 123 on the other metal electrode guide plate 12. Those skilled in the art, under the guidance of this utility model and in conjunction with existing technology, can set the specific arrangement and number of the connecting bolts to ensure reliable overall clamping of the resistor. In this embodiment, the resistor structure is simple and reliable. Of course, to achieve the fixation between the two stacked metal electrode guide plates and the rubber insulating plate, the insulating component can also be of other structural forms, such as a two-lobed snap-fit ​​clamp design, etc.

[0029] In one embodiment of this utility model, the insulating isolation plate is a rubber component. More specifically, the insulating isolation plate 16 is a rubber insulating baffle that is fastened to the main body 121 of the metal electrode guide plate 12 on one side. The rubber insulating baffle includes a rubber panel 161, on which a protruding fastening edge 162 forms a fastening groove. The fastening groove has a notch for the protruding ear plate 122 for power supply connection. The main body 121 of the metal electrode guide plate 12 is inserted into the fastening groove. The rubber panel 161 has a periphery 1611 extending beyond the main body 121 of the metal electrode guide plate 12. The periphery 1611 extending beyond the main body 121 of the metal electrode guide plate 12 increases the creepage distance and improves the insulation performance. Typically, the head of the connecting bolt 151 corresponds to the metal electrode guide plate on one side covered by the rubber insulating baffle. The rubber panel 161 has a recess 1612 for accommodating the head of the connecting bolt. One side of the recess 1612 is a depression for inserting the head of the connecting bolt, and the other side of the recess 1612 protrudes from the rubber panel 161. In this way, the rubber insulating baffle simultaneously shields the head of the connecting bolt.

[0030] To ensure a secure and reliable installation of the insulating isolation plate when the resistor is installed individually, several supporting protrusions 163 protrude outwards from the rubber panel 161. The outer convex top surface of the supporting protrusions 163 serves as the contact support surface 1631 for contacting and supporting external devices. This external device is a component specific to the application scenario, such as... Figure 9 and Figure 10 As shown, adjacent resistor units, or cabinet panels mounted on the cabinet, etc., are examples. It can be seen that the protruding direction of the supporting protrusion 163 is consistent with the protruding direction of the recess, and the protruding height of the supporting protrusion 163 is greater than the protruding height of the recess, to ensure that the contact support surface of the supporting protrusion functions effectively. With this design, under the action of the supporting protrusion, not only are insulation and distance maintenance achieved, but the rubber insulating baffle also prevents it from easily detaching from the metal electrode conductor plate due to the constraint of the supporting protrusion.

[0031] To improve the safety of the resistor, the rubber panel 161 has an outwardly inclined portion 1613 on one side corresponding to the position of the electrical connection lug 122, tilting away from the electrical connection lug 122. One side c of the periphery 1611 is formed on the raised side of the outwardly inclined portion 1613. With this arrangement, a larger gap is formed between the corresponding side of the periphery and the electrical connection lug of the metal electrode conductor, thereby creating a larger creepage distance.

[0032] In one embodiment of this utility model, the spring is claw-shaped, comprising a first piece 141 that abuts against the metal electrode guide plate 12 and a second piece 142 that abuts against the zinc oxide resistor sheet 11. A plurality of first pieces 141 are circumferentially spaced along the second piece 142. In this specific embodiment, there are three first pieces 141, and the first pieces 141 and the second pieces 142 are arranged at an angle to form an elastically deformable structure. This design ensures reliable contact between the spring, the zinc oxide resistor sheet, and the metal electrode guide plate. The spring is preferably made of copper.

[0033] like Figure 9 and Figure 10 As shown, this utility model also discloses a specific application scheme for the aforementioned high-energy zinc oxide resistor unit 1. The high-energy zinc oxide resistor is assembled from multiple high-energy zinc oxide resistor units 1. The figure shows five resistor units 1, arranged in a row and connected in parallel. A conductive post 2, made of aluminum, supports the corresponding electrical connection lugs 122 on adjacent resistor units 1. Corresponding connection holes are provided on the conductive post 2 and the electrical connection lugs 122. A screw 3 passes through the electrical connection lugs 12 and conductive posts 2 of each resistor unit 1 and is then locked in place by a nut 4. The aluminum posts provide spacing and support between adjacent resistor units, resulting in a simple and reliable overall structure.

Claims

1. A high-energy zinc oxide resistor unit, comprising a packaging assembly and a plurality of zinc oxide resistive sheets encapsulated within the packaging assembly, characterized in that: The encapsulation assembly includes two stacked metal electrode guide plates and a rubber insulating plate. The metal electrode guide plate includes a main body and an electrical connection ear plate protruding from one side of the main body. The electrical connection ear plates of the two metal electrode guide plates are arranged laterally in a staggered manner. The rubber insulating plate is sandwiched between the two metal electrode guide plates. The rubber insulating plate extends beyond the edge of the main body of the metal electrode guide plate around its perimeter. The two metal electrode plates are locked together by an insulating component. The rubber insulating plate has several positioning cavities. Zinc oxide resistors are placed in the positioning cavities. Elastic conductive elements are provided on both sides of the zinc oxide resistors. The zinc oxide resistors are electrically connected to the metal electrode guide plates through the elastic conductive elements. An insulating isolation plate covers the outward end face of at least one metal electrode guide plate.

2. The high-energy zinc oxide resistor unit according to claim 1, characterized in that: The rubber insulating board includes two stacked rubber sheets. The two rubber sheets are provided with a number of stepped cavities that correspond to each other to form a number of positioning cavities. Each stepped cavity includes a small-diameter hole and a large-diameter hole with an annular bottom wall. The end faces of the two rubber sheets corresponding to the openings of the large-diameter holes are attached to each other. The zinc oxide resistor is embedded in the large-diameter holes of the two rubber sheets.

3. The high-energy zinc oxide resistor unit according to claim 2, characterized in that: The two rubber plates have raised sealing ribs that surround the edge of the large-diameter orifice. When the two rubber plates are stacked, the sealing ribs at the edge of the large port of the stepped cavity make contact and seal.

4. The high-energy zinc oxide resistor unit according to claim 1, 2, or 3, characterized in that: The insulating component includes several connecting bolts made of insulating material. A through hole is provided on the rubber insulating plate for the connecting bolts to pass through. The main body of the two metal electrode guide plates is fixedly connected by the connecting bolts.

5. The high-energy zinc oxide resistor unit according to claim 1, 2, or 3, characterized in that: The insulating barrier is a rubber insulating baffle that is fastened to the main body of the metal electrode guide plate on one side. The rubber insulating baffle includes a rubber panel. The rubber panel has a protruding fastening edge to form a fastening groove. The fastening groove has a notch for the ear plate for power supply connection to extend out. The main body of the metal electrode guide plate is inserted into the fastening groove. The rubber panel has a periphery that extends out of the main body of the metal electrode guide plate.

6. The high-energy zinc oxide resistor unit according to claim 5, characterized in that: The rubber panel has several outwardly protruding support studs, and the outer convex top surface of the support studs is the contact support surface that contacts and supports external devices.

7. The high-energy zinc oxide resistor unit according to claim 5, characterized in that: The rubber panel has an outwardly inclined portion on one side corresponding to the position of the ear plate for electrical connection, which is tilted and raised towards the side away from the ear plate for electrical connection, and one side of the periphery is formed on the raised side of the outwardly inclined portion.

8. The high-energy zinc oxide resistor unit according to claim 1, 2, or 3, characterized in that: The elastic conductive element is a spring sheet.

9. The high-energy zinc oxide resistor unit according to claim 8, characterized in that: The spring is claw-shaped and includes a first piece that abuts against the metal electrode plate and a second piece that abuts against the zinc oxide resistor piece. Several first pieces are distributed circumferentially at intervals on the second piece.

10. A high-energy zinc oxide resistor, comprising a plurality of resistor units, characterized in that: The resistor unit is a high-energy zinc oxide resistor unit as described in any one of claims 1 to 9. Multiple resistor units are arranged in a row and connected in parallel. A conductive post is supported between the corresponding electrical connection lugs on two adjacent resistor units. Corresponding connection holes are provided on the conductive post and the electrical connection lugs. A screw passes through the electrical connection lugs and conductive posts of each resistor unit and is then locked and fixed by a nut.

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