Large-through-flow zinc oxide arrester core structure

Abstract

The utility model relates to the technical field of lightning arrester core body structures, and discloses a large-through-flow zinc oxide lightning arrester core body structure which comprises a bottom plate, a connecting column is fixedly installed at the top of the bottom plate, a lightning protection shell mechanism is arranged at the top of the connecting column, and a lightning protection core body mechanism is arranged in the lightning protection shell mechanism. According to the large-through-flow zinc oxide lightning arrester core body structure, through the arrangement of the connecting column, in the use process, through the arrangement of an insulator anti-expansion joint technology, the large-through-flow zinc oxide lightning arrester core body structure is improved; the influence of factors such as external insulation bubbling, degumming, swelling of the insulating cylinder and breakage of a thermal shrinkage film caused by thermal expansion and cold shrinkage of the zinc oxide resistor disc, the insulating cylinder protection filler, the first sealing ring with the cover, the second sealing ring with the cover and the silicon rubber insulating layer on environmental climate is comprehensively eliminated, and the through-current capability of the zinc oxide resistor disc is improved; air gaps are prevented from being generated in the zinc oxide resistor disc, and the possibility of breakdown hidden dangers is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of arrester core structures, in particular to a large through-current zinc oxide arrester core structure. Background Art

[0002] A lightning arrester is an electrical appliance used to protect electrical equipment from high transient overvoltage hazards during lightning strikes, and to limit the follow-on time, and often also the follow-on amplitude. A lightning arrester is sometimes also called an overvoltage protector or overvoltage limiter. The arrester core is the core of the arrester, which is used to quickly discharge overvoltage energy and limit the overvoltage at both ends to a certain level to protect the insulation of the equipment.

[0003] In the prior art, the zinc oxide resistor is the core of the arrester core. When the voltage acting on the arrester reaches the operating voltage, the impedance of the zinc oxide resistor will decrease sharply and be in a large current conduction state. However, in actual use, since the current-carrying capacity of the zinc oxide resistor is difficult to improve, air gaps will be generated in the resistor core, posing a risk of breakdown. Therefore, it is necessary to improve a large-current zinc oxide arrester core structure to solve the above problem. Utility Model Content

[0004] The utility model aims to provide a core structure of a large through-current zinc oxide lightning arrester to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a large-current zinc oxide lightning arrester core structure, including a base plate, a connecting column is fixedly installed on the top of the base plate, a lightning protection shell mechanism is arranged on the top of the connecting column, and a lightning protection core mechanism is arranged inside the lightning protection shell mechanism.

[0006] The lightning protection housing mechanism comprises a connecting component and a protecting component, and the protecting component is arranged outside the connecting component.

[0007] Preferably, the connecting assembly includes a sealing ring with a cover, which is fixedly installed on the top of the connecting column, a fastening bolt is arranged inside the sealing ring with a cover, an insulating tube is installed on the external thread of the fastening bolt, a fastening bolt 2 is installed on the internal thread of the insulating tube, and a sealing ring with a cover is arranged outside the fastening bolt 2, so as to facilitate the installation of the lightning arrester through the connecting assembly.

[0008] Preferably, the first fastening bolt is threadedly installed inside the first sealing ring with cover, and the second fastening bolt is threadedly installed inside the second sealing ring with cover, thereby improving the fastening strength.

[0009] Preferably, the protective component includes electrode 1, which is fixedly installed on the inner side of the bottom of the covered sealing ring 1, and electrode 2 is fixedly installed on the inner side of the top of the covered sealing ring 2. A protective filler is fixedly installed inside the insulating tube, and a silicone rubber insulating layer is provided on the outside of the insulating tube, so as to facilitate the protection of the lightning arrester through the protective component.

[0010] Preferably, holes are provided at corresponding positions of the silicone rubber insulating layer and the fastening bolts 1 and 2, and the fastening bolts 1 and 2 are slidably installed inside the holes provided inside the silicone rubber insulating layer, so as to facilitate installation under normal conditions.

[0011] Preferably, the first sealing ring with lid and the second sealing ring with lid are symmetrically distributed at the two ends of the protective filler, and the first sealing ring with lid and the second sealing ring with lid are slidably installed inside the protective filler, thereby improving the structural sealing.

[0012] Preferably, the lightning protection core mechanism includes a grounding lead, which is arranged inside the insulating cylinder. A zinc oxide resistor is fixedly installed inside the insulating cylinder, and a pressure butterfly spring is arranged on the top of the zinc oxide resistor to facilitate the overall balance of the core through the lightning protection shell mechanism.

[0013] Compared with the prior art, the utility model provides a core structure of a large through-current zinc oxide arrester, which has the following beneficial effects:

[0014] 1. The core structure of the large-current zinc oxide lightning arrester is equipped with a connecting column. During use, the insulator anti-expansion joint technology is set to comprehensively eliminate the influence of the zinc oxide resistor, the insulating tube protective filler, the covered sealing ring 1, the covered sealing ring 2 and the silicone rubber insulating layer on the environmental climate, which causes external insulation blistering, degumming, insulation tube swelling and heat shrink film breakage of the product. While ensuring that the zinc oxide resistor improves its current capacity, it prevents the occurrence of air gaps in the zinc oxide resistor and avoids the possibility of breakdown hazards.

[0015] 2. The core structure of the large-current zinc oxide lightning arrester, through the lightning arrester core mechanism set up, during use, by using the zinc oxide resistor piece segmented precision matching, the total section precision measurement principle processing method, to ensure that each section of the gradient is different, the resistance is accurately matched, so that the overall unloading absorption energy is balanced, and the reliability of the lightning arrester is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor:

[0017] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0018] Figure 2 This is a partial cross-sectional structural diagram of the utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional appearance structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the exploded appearance structure of the lightning protection shell mechanism of the utility model;

[0021] Figure 5 The figure is a schematic diagram of the appearance structure of the lightning protection core mechanism of the utility model.

[0022] In the figure: 1. bottom plate; 2. connecting column; 3. lightning protection shell mechanism; 31. connecting assembly; 311. sealing ring with cover one; 312. fastening bolt one; 313. insulating tube; 314. fastening bolt two; 315. sealing ring with cover two; 32. protective assembly; 321. electrode one; 322. electrode two; 323. protective filler; 324. silicone rubber insulating layer; 4. lightning protection core mechanism; 41. grounding lead; 42. zinc oxide resistor; 43. pressure butterfly spring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it 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 the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Embodiment 1:

[0026] See also Figure 1-4 The utility model provides a technical solution: a large-current zinc oxide arrester core structure, including a base plate 1, a connecting column 2 is fixedly installed on the top of the base plate 1, a lightning protection shell mechanism 3 is arranged on the top of the connecting column 2, and a lightning protection core mechanism 4 is arranged inside the lightning protection shell mechanism 3.

[0027] The lightning protection housing mechanism 3 includes a connecting component 31 and a protecting component 32 , and the protecting component 32 is arranged outside the connecting component 31 .

[0028] Furthermore, the connecting component 31 includes a covered sealing ring 311, which is fixedly installed on the top of the connecting column 2. A fastening bolt 312 is arranged inside the covered sealing ring 311, an insulating tube 313 is installed on the external thread of the fastening bolt 312, a fastening bolt 314 is installed on the internal thread of the insulating tube 313, and a covered sealing ring 315 is arranged outside the fastening bolt 314, so as to facilitate the installation of the lightning arrester through the connecting component 31.

[0029] Furthermore, the fastening bolt 1 312 is threadedly installed inside the cover sealing ring 1 311, and the fastening bolt 2 314 is threadedly installed inside the cover sealing ring 2 315, thereby improving the fastening strength.

[0030] Furthermore, the protective component 32 includes an electrode 321, which is fixedly mounted on the inner side of the bottom of the covered sealing ring 311, an electrode 322 is fixedly mounted on the inner side of the top of the covered sealing ring 315, a protective filler 323 is fixedly mounted inside the insulating tube 313, and a silicone rubber insulating layer 324 is provided outside the insulating tube 313, so as to facilitate the protection of the lightning arrester through the protective component 32.

[0031] Furthermore, holes are opened at corresponding positions of the silicone rubber insulating layer 324 and the fastening bolts 1 312 and 2 314, and the fastening bolts 1 312 and 2 314 are slidably installed inside the holes opened inside the silicone rubber insulating layer 324, so as to facilitate installation under normal conditions.

[0032] Furthermore, the first sealing ring 311 with cover and the second sealing ring 315 with cover are symmetrically distributed at the two ends of the protective filler 323, and the first sealing ring 311 with cover and the second sealing ring 315 with cover are slidably installed inside the protective filler 323, thereby improving the structural sealing.

[0033] Embodiment two:

[0034] See also Figure 5, and combined with Example 1, it is further obtained that the lightning protection core mechanism 4 includes a grounding lead 41, and the grounding lead 41 is arranged inside the insulating tube 313, and a zinc oxide resistor 42 is fixedly installed inside the insulating tube 313, and a pressure butterfly spring 43 is arranged on the top of the zinc oxide resistor 42, so as to facilitate the overall balance of the core through the lightning protection shell mechanism 3.

[0035] In actual operation, when the device is used, the insulator anti-expansion joint technology is set to comprehensively eliminate the influence of the thermal expansion and contraction of the zinc oxide resistor 42, the insulating tube 313 protective filler 323, the covered sealing ring 1 311, the covered sealing ring 2 315 and the silicone rubber insulating layer 324 on the environmental climate, which may cause external insulation bubbling, degumming, swelling of the insulating tube 313 and breakage of the heat shrink film of the product. While ensuring that the zinc oxide resistor 42 improves the current carrying capacity, it prevents the occurrence of air gaps in the zinc oxide resistor 42 to avoid the possibility of breakdown hazards. The zinc oxide resistor 42 is processed by adopting the principle of segmented precision matching and total segment precision measurement to ensure that each segment has a different gradient and accurately matches the resistance, so that the overall unloading and absorption energy is balanced.

[0036] In order to eliminate the hidden danger of moisture in the core, in addition to adding double-end electrode sealing rings, namely, sealing ring 1 311 with cover and sealing ring 2 315 with cover, high-performance heat shrinkable material and epoxy material anti-moisture groove are added to the zinc oxide resistor 42, and the service life of the product is greatly improved.

[0037] By applying overall structural mechanics, a new connection structure between the electrode and the epoxy tube is used, that is, the insulating tube 313 and the electrode 1 321 and the electrode 2 322 are fastened with screws and a cover sealing ring 1 311 and a cover sealing ring 2 315 are added. Compared with the traditional structure of the electrode and the insulating tube spirally pressed, the moisture-proof capacity and mechanical strength difference are significantly improved.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A core structure of a large through-current zinc oxide lightning arrester, comprising a bottom plate (1), characterized in that: A connecting column (2) is fixedly mounted on the top of the base plate (1), a lightning protection shell mechanism (3) is arranged on the top of the connecting column (2), and a lightning protection core mechanism (4) is arranged inside the lightning protection shell mechanism (3); The lightning protection housing mechanism (3) comprises a connecting component (31) and a protection component (32), wherein the protection component (32) is arranged outside the connecting component (31); The connection assembly (31) comprises a first sealing ring with a cover (311), the first sealing ring with a cover (311) is fixedly mounted on the top of the connection column (2), a first fastening bolt (312) is arranged inside the first sealing ring with a cover (311), an insulating tube (313) is installed on the external thread of the first fastening bolt (312), a second fastening bolt (314) is installed on the internal thread of the insulating tube (313), and a second sealing ring with a cover (315) is arranged outside the second fastening bolt (314); The protective component (32) comprises an electrode 1 (321), wherein the electrode 1 (321) is fixedly mounted on the inner side of the bottom of the cover sealing ring 1 (311), the electrode 2 (322) is fixedly mounted on the inner side of the top of the cover sealing ring 2 (315), a protective filler (323) is fixedly mounted inside the insulating tube (313), and a silicone rubber insulating layer (324) is arranged outside the insulating tube (313).

2. The high-current zinc oxide arrester core structure according to claim 1 is characterized in that: The fastening bolt 1 (312) is threadedly installed inside the first sealing ring with cover (311), and the fastening bolt 2 (314) is threadedly installed inside the second sealing ring with cover (315).

3. The core structure of a large through-current zinc oxide arrester according to claim 1, characterized in that: The silicone rubber insulating layer (324) is provided with holes at corresponding positions of the fastening bolt 1 (312) and the fastening bolt 2 (314), and the fastening bolt 1 (312) and the fastening bolt 2 (314) are slidably installed inside the holes provided inside the silicone rubber insulating layer (324).

4. The core structure of a large through-current zinc oxide lightning arrester according to claim 1, characterized in that: The first sealing ring with cover (311) and the second sealing ring with cover (315) are symmetrically distributed at the two ends of the protective filler (323), and the first sealing ring with cover (311) and the second sealing ring with cover (315) are slidably installed inside the protective filler (323).

5. The core structure of a large through-current zinc oxide lightning arrester according to claim 1, characterized in that: The lightning protection core mechanism (4) comprises a grounding lead (41), the grounding lead (41) is arranged inside the insulating cylinder (313), a zinc oxide resistor (42) is fixedly installed inside the insulating cylinder (313), and a pressure butterfly spring (43) is arranged on the top of the zinc oxide resistor (42).

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