A zinc oxide lightning arrester and a substation

Abstract

This application relates to a zinc oxide arrester and a substation, belonging to the technical field of arresters. It includes a silicone rubber outer sheath, a number of umbrella skirts fixedly arranged on the outer peripheral surface of the silicone rubber outer sheath, and sealing fittings for blocking the openings at both ends of the silicone rubber outer sheath. Inside the silicone rubber outer sheath, there are a number of resistive varistors; an insulating sleeve is arranged inside the silicone rubber outer sheath and sleeved outside the resistive varistors. A rain cap made of silicone rubber is sleeved on the outer periphery of one end of the silicone rubber outer sheath, and the inner wall of the rain cap is tightly pressed against the outer peripheral surface of the silicone rubber outer sheath; when the zinc oxide arrester is installed vertically in a harsh outdoor environment, a protective cap can be used in advance to protect the upper end of the zinc oxide arrester, improving its waterproof and moisture-proof performance; when the arrester is transported over a long distance, two protective shells are detachably installed on the outside of the silicone rubber outer sheath, thereby reducing the possibility of damage to the silicone rubber outer sheath during transportation.

Description

Technical Field

[0001] This application relates to the technical field of lightning arresters, and particularly to a zinc oxide lightning arrester and a substation. Background Art

[0002] A zinc oxide lightning arrester applied in a box-type substation, as a key power protection device, its core structure lies in several non-linear resistance varistors encapsulated inside a silicone rubber outer sheath. These varistors are mainly made of zinc oxide material. Zinc oxide is widely used due to its excellent non-linear volt-ampere characteristics, making the current of the lightning arrester extremely low under normal operating voltage, almost negligible (in the microampere or milliampere level). However, once encountering an overvoltage situation, its resistance will rapidly decrease, thereby effectively discharging the overvoltage energy and achieving reliable protection of power equipment.

[0003] In a specific technical implementation, this kind of lightning arrester usually consists of a silicone rubber outer sheath and zinc oxide resistance varistors built therein. The outer periphery of the silicone rubber outer sheath is ingeniously designed with an integrally formed umbrella skirt structure, which not only enhances the insulation performance of the lightning arrester but also improves its ability to resist pollution and prevent ice and snow. In addition, sealing fittings are firmly installed at both ends of the silicone rubber outer sheath, and the function of these fittings is to tightly block the openings of the silicone rubber outer sheath to prevent interference and damage from the external environment.

[0004] However, in actual applications, especially when the lightning arrester is installed vertically outdoors, the connection between the top fitting and the silicone rubber outer sheath may become a potential sealing weakness. In severe weather with rain and snow, external moisture may seep into the lightning arrester through this tiny gap, causing adverse effects on the zinc oxide resistance varistors, and even leading to performance degradation or failure. This problem not only threatens the service life of the lightning arrester itself but also may pose a potential threat to the safety of the entire power system, and there is room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide a zinc oxide lightning arrester and a substation to solve the problem of insufficient sealing performance at the connection between the top fitting and the silicone rubber outer sheath when the above-mentioned lightning arrester is applied vertically in harsh outdoor conditions.

[0006] A zinc oxide lightning arrester provided by this application adopts the following technical solution:

[0007] A zinc oxide lightning arrester includes a silicone rubber outer sheath, several umbrella skirts fixedly arranged on the outer peripheral surface of the silicone rubber outer sheath, sealing fittings for blocking the openings at both ends of the silicone rubber outer sheath, and several resistance varistors are arranged inside the silicone rubber outer sheath; an insulating sleeve is arranged inside the silicone rubber outer sheath and sleeved outside the resistance varistors, and a rain-proof cap made of silicone rubber is sleeved on the outer periphery of one end of the silicone rubber outer sheath, and the inner wall of the rain-proof cap abuts against the outer peripheral surface of the silicone rubber outer sheath.

[0008] By adopting the above technical solution, when the zinc oxide lightning arrester is installed vertically in the outdoor harsh environment, due to the application and setting of the rain-proof cap, the staff can pre-protect the upper end of the zinc oxide lightning arrester with the protective cap. At this time, the inner wall of the rain-proof cap is in close contact with the outer peripheral surface of the silicone rubber outer sleeve, so as to improve its waterproof and moisture-proof performance. Moreover, the silicone material has an aging resistance of more than 20 years, with a long service life, reducing the possibility of external moisture seeping into the interior from the connection between the silicone rubber outer sleeve and the upper end sealing fitting.

[0009] Optionally, two protective shells are symmetrically arranged outside the silicone rubber outer sleeve. The protective shells are provided with protective cavities for the silicone rubber outer sleeve to be placed in. Limiting members for abutting against the outer periphery of the silicone rubber outer sleeve are arranged on the inner walls of the protective cavities. After the two protective shells are installed outside the silicone rubber outer sleeve, they are detachably connected.

[0010] By adopting the above technical solution, due to the combined setting of the protective shell and the limiting member, when the lightning arrester is transported over a long distance, the two protective shells are detachably installed outside the silicone rubber outer sleeve, and the limiting member is used to tightly abut the wrapped silicone rubber outer sleeve, so as to better protect the outside of the silicone rubber outer sleeve through the two protective shells, reducing the possibility of the silicone rubber outer sleeve being damaged during transportation.

[0011] Optionally, the overall length of the protective shell is adjustable. The protective shell includes an upper half shell and a lower half shell. An adjusting plate located outside the upper half shell is fixedly arranged on the side edge of the lower half shell facing the upper half shell. The adjusting plate is slidably connected to the outer side surface of the upper half shell; a number of adjusting through holes are provided on the adjusting plate, and adjusting screw holes capable of coinciding with the adjusting through holes are provided on the upper half shell. An adjusting bolt is arranged outside the silicone rubber outer sleeve and is screwed into the adjusting screw hole after passing through the adjusting through hole.

[0012] By adopting the above technical solution, due to the adjustable setting of the upper half shell and the lower half shell, the length dimension of the protective shell can be adjusted according to actual needs; when the upper half shell and the lower half shell are slidably adjusted to a certain state, the adjusting bolt is passed through the adjusting through hole and then screwed into the adjusting screw hole, and the overall length state of the protective shell in this state can be fixed, enabling it to protect lightning arresters of different lengths and improving its service performance.

[0013] Optionally, a guiding convex strip is fixedly arranged on the outer side surface of the upper half shell, and a guiding sliding groove for the guiding convex strip to be inserted and slid is provided on the adjusting plate. The cross-sectional shapes of the guiding convex strip and the guiding sliding groove are both dovetail-shaped.

[0014] By adopting the above technical solution, due to the cooperation setting of the guiding convex strip and the guiding sliding groove, the stability of the mutual sliding between the upper half shell and the lower half shell is enhanced during the adjustment process.

[0015] Optionally, the limiting member is a plurality of elastic abutting rings fixedly arranged on the inner walls of the upper half shell and the lower half shell. Limiting card slots for embedding and fixing the elastic abutting rings are formed on the inner walls of the upper half shell and the lower half shell. The inner side surface of the elastic abutting ring can tightly abut against the outer peripheral surface of the silicone rubber outer sleeve.

[0016] By adopting the above technical solution, due to the arrangement of the limiting card slots, during the installation process of the elastic abutting rings, the elastic abutting rings can be embedded and fixed into the corresponding limiting card slots, so as to facilitate the installation and fixing of the elastic abutting rings and improve the corresponding installation efficiency. When the protective shell protects the lightning arrester, the porcelain shell is located between the two protective shells, and the elastic abutting rings fixed on the inner wall of the protective shell tightly abut against the umbrella skirt structure on the silicone rubber outer sleeve, reducing the possibility of the lightning arrester being knocked and damaged during transportation.

[0017] Optionally, both the upper half shell and the lower half shell are made of conductive materials. The side edge of the lower half shell away from the upper half shell is hinged to the outer peripheral edge of the sealing fitting. The two lower half shells can rotate away from the silicone rubber outer sleeve to a state where their outer sides abut against each other, and the ends of the two upper half shells away from the lower half shells can be fixed on the installation surface in this state.

[0018] By adopting the above technical solution, due to the hinged arrangement of the upper half shell and the lower half shell, when the lightning arrester is installed and applied, the two protective shells can be rotated away from the silicone rubber outer sleeve to a vertical state, and then the flipped upper half shell can be fixed on the installation surface by using screws or other methods. Moreover, the installation height of the lightning arrester can be adjusted according to actual needs, improving the service performance of the protective shell.

[0019] Optionally, a blocking plate is hinged on the side edge of the upper half shell away from the lower half shell, and a locking rod is arranged outside the silicone rubber outer sleeve. Locking blocks are fixedly arranged on the outer peripheries of both ends of the locking plate. An elastic clamping member is arranged on the outer periphery of the locking block. A first locking slot is formed on the blocking plate, and a first locking groove for the elastic clamping member to be clamped into is formed on the inner wall of the first locking slot. When the protective shell protects the outside of the silicone rubber outer sleeve, the two blocking plates rotate towards each other to a state of abutting against the sealing fitting, and the two locking blocks can be simultaneously clamped into the first locking slots on the two blocking plates in this state, and the elastic clamping member is clamped into the first locking groove.

[0020] By adopting the above technical solution, when the protective shell protects the lightning arrester, the two blocking plates rotate towards each other to a state of abutting against the corresponding sealing fitting in this state, and then the two locking blocks are simultaneously clamped into the first locking slots on the two blocking plates, and the elastic clamping member is clamped into the first locking groove, thereby detachably locking the two blocking plates.

[0021] Optionally, a second locking groove is formed on the outer side surface of the lower half shell, and a second locking recess is formed on the inner wall of the second locking groove; when the two lower half shells are rotated away from the silicone rubber outer sleeve until their outer side surfaces are in contact with each other, the two locking blocks can be snapped into the second locking groove, and the elastic snap member is snapped into the corresponding second locking recess.

[0022] By adopting the above technical solution, when the arrester is installed and applied, the two protective shells are rotated away from the silicone rubber outer sleeve until they are in a vertical state. At this time, the locking member has been removed from the sealing plate, and the staff can snap the two locking blocks on the locking rod into the second locking groove, and the elastic snap member is snapped into the corresponding second locking recess, further locking the two protective shells in this state, and improving the support stability of the protective shell for the arrester.

[0023] Optionally, waist-shaped fixing holes are formed on the sealing plate. When the two lower half shells are rotated away from the silicone rubber outer sleeve until their outer side surfaces are in contact with each other, the two sealing plates can be rotated away from each other until they are in contact with the installation surface.

[0024] By adopting the above technical solution, when the arrester is installed and applied, the two protective shells are rotated away from the silicone rubber outer sleeve until they are in a vertical state, and the two sealing plates are rotated away from each other until they are in contact with the installation surface. The staff can use screws to pass through the waist-shaped fixing holes and screw them into the screw holes on the installation surface, thereby realizing the installation and fixation of the arrester.

[0025] Optionally, a substation includes a box body, a box door arranged on the box body, and the above-mentioned zinc oxide arrester. A power distribution room for installing the zinc oxide arrester is arranged inside the box body.

[0026] By adopting the above technical solution, the zinc oxide arrester is installed in the power distribution room inside the box-type substation. During the operation of the power system, such as the closing and opening of switches, etc., switching overvoltages may be generated. The zinc oxide arrester can absorb the energy of these overvoltages and protect the substation and the internal electrical equipment from damage.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] When the zinc oxide arrester is installed vertically in a harsh outdoor environment, due to the application of the rain protection cap, the staff can pre-protect the upper end of the zinc oxide arrester with the protective cap. At this time, the inner wall of the rain protection cap is tightly pressed against the outer peripheral surface of the silicone rubber outer sleeve, so as to improve its waterproof and moisture-proof performance, and the silicone material has an aging resistance of more than 20 years, with a long service life, reducing the possibility of external moisture seeping into the interior from the connection between the silicone rubber outer sleeve and the upper end sealing fitting. Description of the Drawings

[0029] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0030] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present application;

[0031] Figure 2 is the structural schematic diagram showing the installation distribution of the rainproof cap in Embodiment 1 of the present application;

[0032] Figure 3 is the sectional structural schematic diagram showing the installation and cooperation of the silicone rubber outer sleeve and the sealing fitting in Embodiment 1 of the present application;

[0033] Figure 4 is the overall structural schematic diagram showing the installation and cooperation of the protective shell and the silicone rubber outer sleeve in Embodiment 2 of the present application;

[0034] Figure 5 is the sectional structural schematic diagram showing the installation and cooperation of the protective shell and the silicone rubber outer sleeve in Embodiment 2 of the present application;

[0035] Figure 6 is the exploded structural schematic diagram showing the installation distribution of the upper half shell and the lower half shell in Embodiment 2 of the present application;

[0036] Figure 7 is the partial sectional structural schematic diagram showing the installation cooperation of the locking member in Embodiment 2 of the present application;

[0037] Figure 8 is the partial sectional structural schematic diagram showing the installation cooperation of the elastic snap member in Embodiment 2 of the present application;

[0038] Figure 9 is the structural schematic diagram showing the state when the protective shell rotates away from the silicone rubber outer sleeve to the vertical state in Embodiment 2 of the present application;

[0039] Figure 10 is the sectional structural schematic diagram showing the installation cooperation of the locking rod in Embodiment 2 of the present application;

[0040] Figure 11 is the partial sectional structural schematic diagram showing the installation cooperation of the locking rod in Embodiment 2 of the present application;

[0041] Figure 12 is the overall structural schematic diagram showing the installation and cooperation of the box body and the box door in Embodiment 3 of the present application.

[0042] In the figure, 1 is a silicone rubber outer sheath; 11 are umbrella skirts; 2 is a sealing fitting; 3 is a resistive varistor; 4 is an insulating sleeve; 5 is a rainproof cap; 6 is a protective shell; 61 is the upper half shell; 611 is a limit card slot; 612 is an adjustment screw hole; 613 is a guiding rib; 62 is the lower half shell; 621 is an adjustment plate; 6211 is an adjustment through hole; 6212 is a guiding sliding groove; 622 is a second locking groove; 623 is a second locking recess; 63 is an adjustment bolt; 64 is a limiting member; 641 is an elastic abutting ring; 65 is a plugging plate; 651 is a first locking groove; 652 is a first locking recess; 653 is an oblong fixing hole; 7 is a locking member; 71 is a locking rod; 72 is a locking block; 721 is a placement groove; 73 is an elastic clamping member; 731 is a compression spring; 732 is an arc-shaped convex block; 8 is a box body; 9 is a box door. Detailed implementation manners

[0043] The following further elaborates on this application in conjunction with all the attached drawings.

[0044] Embodiment 1:

[0045] Referring to Figure 1 、 Figure 2 and Figure 3 , a zinc oxide lightning arrester includes a silicone rubber outer sheath 1 and a sealing fitting 2 that plugs the openings at both ends of the silicone rubber outer sheath 1. A plurality of umbrella skirts 11 are integrally formed on the outer peripheral surface of the silicone rubber outer sheath 1 along its own length direction, and a plurality of resistive varistors 3 made of zinc oxide material are stacked along the length direction of the silicone rubber outer sheath 1 inside; an insulating sleeve 4 sleeved outside the resistive varistor 3 is arranged inside the silicone rubber outer sheath 1;

[0046] The resistive varistor 3 has good non-linear volt-ampere characteristics, small volume, good function, a square wave greater than 200A, a large current greater than 10KA, and has good performance; and this zinc oxide lightning arrester can be combined with an on-line monitoring device and can be on-line monitored, specifically, it can monitor its temperature change, leakage current, partial discharge, number of operations, etc.;

[0047] A rainproof cap 5 made of silicone rubber is sleeved on the outer periphery of one end of the silicone rubber outer sheath 1; when the zinc oxide lightning arrester is installed vertically in a harsh outdoor environment, the protective cap 5 can be used to protect the upper end of the zinc oxide lightning arrester. At this time, the inner wall of the rainproof cap 5 abuts against the outer peripheral surface of the silicone rubber outer sheath 1 to improve its waterproof and moisture-proof performance, and the silicone material has an aging resistance of more than 20 years.

[0048] The implementation principle of the embodiment of this application is:

[0049] When the zinc oxide lightning arrester is installed vertically in the outdoor harsh environment, the protective cap 5 can be used to protect the upper end of the zinc oxide lightning arrester, improve its waterproof and moisture-proof performance, and reduce the possibility of external moisture seeping into the interior from the connection between the silicone rubber outer sheath 1 and the upper end sealing fitting 2.

[0050] Embodiment 2:

[0051] Refer to Figure 4 and Figure 5 In this application, the difference between the embodiment and Embodiment 1 is that two protective shells 6 are symmetrically arranged on the outside of the silicone rubber outer sheath 1. A protective cavity for the silicone rubber outer sheath 1 to be placed is provided on the protective shell 6, and a limiting member 64 for limiting and abutting the silicone rubber outer sheath 1 is arranged on the inner wall of the protective cavity. After the two protective shells 6 are installed on the outside of the silicone rubber outer sheath 1, they are detachably connected;

[0052] When the lightning arrester is transported, the two protective shells 6 are installed on the outside of the silicone rubber outer sheath 1, and the wrapped silicone rubber outer sheath 1 is tightened by using the limiting member 64, so as to better protect the outside of the silicone rubber outer sheath 1 through the two protective shells 6 and reduce the possibility of damage to the silicone rubber outer sheath 1 during transportation.

[0053] Refer to Figure 5 and Figure 6 The overall length of the protective shell 6 is adjustable. The protective shell 6 includes an upper half shell 61 and a lower half shell 62 arranged in a straight line. An adjusting plate 621 located outside the upper half shell 61 is integrally formed on the side edge of the lower half shell 62 facing the upper half shell 61; a number of adjusting through holes 6211 are provided on the adjusting plate 621, and adjusting screw holes 612 that can coincide with the adjusting through holes 6211 are provided on the upper half shell 61. An adjusting bolt 63 that passes through the adjusting through holes 6211 and is screwed into the adjusting screw holes 612 is provided on the outside of the silicone rubber outer sheath 1; when the upper half shell 61 and the lower half shell 62 are slid and adjusted to a certain state, the adjusting bolt 63 is passed through the adjusting through holes 6211 and screwed into the adjusting screw holes 612, and the overall length state of the protective shell 6 in this state can be fixed.

[0054] Refer to Figure 5 and Figure 6 On the outer side surface of the upper half shell 61, a guiding convex strip 613 is integrally formed along its own length direction, and a guiding sliding groove 6212 for the guiding convex strip 613 to be inserted and slide is provided on the adjusting plate 621. The cross-sectional shapes of the guiding convex strip 613 and the guiding sliding groove 6212 are both dovetail-shaped, so as to realize the sliding connection between the adjusting plate 621 and the outer side surface of the upper half shell 61.

[0055] Refer to Figure 5, the limiting member 64 is a plurality of elastic abutting rings 641 fixedly arranged on the inner walls of the upper half shell 61 and the lower half shell 62, and the elastic abutting rings 641 are made of rubber. Limiting card slots 611 for the elastic abutting rings 641 to be embedded and further fixed by glue are provided on the inner walls of the upper half shell 61 and the lower half shell 62; when the protective shell 6 protects the outside of the silicone rubber outer sleeve 1, at this time, the inner side surface of the elastic abutting ring 641 can be tightly abutted against the outer peripheral surface of the silicone rubber outer sleeve 1.

[0056] Referring to Figure 5 , Figure 7 and Figure 8 , both the upper half shell 61 and the lower half shell 62 are made of conductive materials, have good electrical conductivity, and do not affect the discharge performance of the lightning arrester. The side edge of the lower half shell 62 away from the upper half shell 61 is hinged to the outer peripheral edge of the sealing fitting 2; a blocking plate 65 is hinged on the side edge of the upper half shell 61 away from the lower half shell 62, and a locking member 7 for detachably locking the two blocking plates 65 is provided outside the silicone rubber outer sleeve 1;

[0057] The locking member 7 includes a locking rod 71 and locking blocks 72 fixedly arranged on the outer peripheries of both ends of the locking plate. An elastic clamping member 73 is provided on the outer periphery of the locking block 72. A first locking groove 651 is provided on the blocking plate 65, and a first locking recess 652 for the elastic clamping member 73 to be inserted into is provided on the inner wall of the first locking groove 651;

[0058] When the protective shell 6 protects the outside of the silicone rubber outer sleeve 1, first rotate the two protective shells 6 towards the direction close to the silicone rubber outer sleeve 1 to a parallel state, and make the two blocking plates 65 rotate towards each other to a state of abutting against the corresponding sealing fitting 2 in this state. Then, simultaneously insert the two locking blocks 72 into the first locking grooves 651 on the two blocking plates 65, and the elastic clamping member 73 is inserted into the first locking recess 652, thereby detachably locking the two blocking plates 65.

[0059] Referring to Figure 7 and Figure 8 , the elastic clamping member 73 includes a compression spring 731 and an arc-shaped convex block 732. A placement groove 721 for the compression spring 731 and the arc-shaped convex block 732 to be placed in is provided on the locking block 72. The compression spring 731 squeezes one side of the arc-shaped convex block 732, so that a part of the arc-shaped convex block 732 protrudes from the opening of the placement groove 721, and the protruding part of the arc-shaped convex block 732 is an arc surface, and the corresponding arc length of the arc surface is a minor arc.

[0060] Referring to Figure 9, waist-shaped fixing holes 653 are formed in both of the two plugging plates 65; the two lower half shells 62 can rotate away from the silicone rubber outer sleeve 1 until their outer sides are in contact with each other. In this state, the two protective shells 6 are in a parallel state, and the two plugging plates 65 can rotate away from each other until they are in contact with the installation surface. In this state, the staff can use screws to pass through the waist-shaped fixing holes 653 and screw them into the screw holes on the installation surface, thereby realizing the installation and fixation of the lightning arrester; and the staff can adjust the installation height of the lightning arrester by adjusting the overall length of the protective shell 6.

[0061] Referring to Figure 10 and Figure 11 , a second locking groove 622 is formed on the outer side surface of the lower half shell 62, and a second locking groove 623 is formed on the inner wall of the second locking groove 622; when the two lower half shells 62 can rotate away from the silicone rubber outer sleeve 1 until their outer sides are in contact with each other, at this time the locking member 7 has been removed from the plugging plate 65, and the staff can insert the two locking blocks 72 on the locking rod 71 into the second locking groove 622, and the elastic clamping member 73 is inserted into the corresponding second locking groove 623 to further lock the state of the two protective shells 6 in this state.

[0062] The implementation principle of the embodiment of the present application is as follows:

[0063] When the lightning arrester is transported, the two protective shells 6 are rotated towards the silicone rubber outer sleeve 1 until they are parallel to each other, the inner side surface of the elastic abutting ring 641 abuts tightly against the outer peripheral surface of the silicone rubber outer sleeve 1, then the two plugging plates 65 are rotated downwards, and the two plugging plates 65 are locked by using the locking member 7;

[0064] When the lightning arrester is installed, first unlock the locking of the plugging plate 65 by the locking member 7, then adjust the overall degree of the protective shell 6 according to actual needs, then rotate the two protective shells 6 away from the silicone rubber outer sleeve 1 until they are parallel to each other, and use the lock to lock the two mutually abutted lower half shells 62; finally, rotate the two plugging plates 65 away from each other until they are in contact with the installation surface. In this state, screws can be used to pass through the waist-shaped fixing holes 653 and screw them into the screw holes on the installation surface, thereby realizing the installation and fixation of the lightning arrester.

[0065] Embodiment 3:

[0066] Referring to Figure 12 , a substation includes a box body 8, a box door 9 provided on the box body 8, and the above-mentioned zinc oxide lightning arrester. One side of the box door 9 is hinged to the box body 8, and the other side of the box door 9 is detachably connected to the box body 8 through a conventional lock structure. A power distribution room for installing the zinc oxide lightning arrester is provided in the box body 8;

[0067] Install the zinc oxide arrester in the distribution room inside the box-type substation. During the operation of the power system, such as the closing and opening of switches, switching overvoltages may be generated. The zinc oxide arrester can absorb the energy of these overvoltages and protect the substation and the electrical equipment inside from damage.

[0068] Unless otherwise defined, the terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the field to which this application belongs. The terms "first", "second", "third" and similar words used in the text of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "a" or "one" do not indicate a quantity limitation either, but indicate that there is at least one. Words such as "including" or "comprising" mean that the elements or objects appearing before "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right", etc. are only used to indicate the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0069] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same parts are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A zinc oxide lightning arrester, comprising a silicone rubber jacket (1), a plurality of sheds (11) fixed to the outer peripheral surface of the silicone rubber jacket (1), and sealing hardware (2) for blocking the openings at both ends of the silicone rubber jacket (1), wherein a plurality of resistor valve plates (3) are arranged inside the silicone rubber jacket (1), and an insulating sleeve (4) is arranged inside the silicone rubber jacket (1) and is sleeved on the outside of the resistor valve plates (3); characterized in that: A rainproof cap (5) made of silicone rubber is sleeved on the outer periphery of one end of the silicone rubber jacket (1), and the inner wall of the rainproof cap (5) is tightly pressed against the outer periphery of the silicone rubber jacket (1); Two protective shells (6) are symmetrically arranged outside the silicone rubber jacket (1), and a protective cavity is provided on the protective shell (6) for the silicone rubber jacket (1) to be placed therein. A stopper (64) is provided on the inner wall of the protective cavity for abutting against the outer periphery of the silicone rubber jacket (1). The two protective shells (6) are detachably connected after being installed outside the silicone rubber jacket (1); The overall length of the protective shell (6) is adjustable. The protective shell (6) comprises an upper half shell (61) and a lower half shell (62). An adjustment plate (621) located outside the upper half shell (61) is fixedly provided on the side edge of the lower half shell (62) facing the upper half shell (61). The adjustment plate (621) is slidably connected to the outer side surface of the upper half shell (61). The adjusting plate (621) is provided with a plurality of adjusting through holes (6211), the upper half shell (61) is provided with adjusting screw holes (612) that can overlap with the adjusting through holes (6211), and the outer portion of the lower half shell (62) is provided with adjusting bolts (63) that penetrate through the adjusting through holes (6211) and are screwed into the adjusting screw holes (612); The upper half shell (61) and the lower half shell (62) are both made of conductive materials, and the side edge of the lower half shell (62) away from the upper half shell (61) is hinged to the outer peripheral edge of the sealing hardware (2); the two lower half shells (62) can be rotated in a direction away from the silicone rubber jacket (1) until the outer sides abut against each other, and the ends of the two upper half shells (61) away from the lower half shell (62) can be fixed on the installation surface in this state; A blocking plate (65) is hingedly connected to the side edge of the upper half shell (61) away from the lower half shell (62), and a locking rod (71) is arranged outside the blocking plate (65); locking blocks (72) are fixedly arranged on the outer periphery of both ends of the locking rod (71), and an elastic clamping piece (73) is arranged on the outer periphery of the locking block (72); a first locking groove (651) is provided on the blocking plate (65), and a first locking recess (652) for the elastic clamping piece (73) to be clamped in is provided on the inner wall of the first locking groove (651); When the protective shell (6) protects the outside of the silicone rubber jacket (1), the two blocking plates (65) rotate towards each other until they are in contact with the sealing hardware (2), and the two locking blocks (72) can be simultaneously inserted into the first locking grooves (651) on the two blocking plates (65) in this state, and the elastic clamping piece (73) is inserted into the first locking groove (652); A second locking groove (622) is provided on the outer surface of the lower half shell (62), and a second locking groove (623) is provided on the inner wall of the second locking groove (622); when the two lower half shells (62) are rotated in a direction away from the silicone rubber jacket (1) until the outer surfaces abut against each other, the two locking blocks (72) can be snapped into the second locking grooves (622), and the elastic snap-fitting member (73) can be snapped into the corresponding second locking grooves (623); The sealing plate (65) is provided with a waist-shaped fixing hole (653), and when the two lower half shells (62) are rotated in a direction away from the silicone rubber jacket (1) until the outer side surfaces abut against each other, the two sealing plates (65) can be rotated away from each other until they abut against the mounting surface.

2. A zinc oxide lightning arrester according to claim 1, characterized in that: A guide ridge (613) is fixedly provided on the outer surface of the upper half shell (61), and a guide groove (6212) is provided on the adjustment plate (621) for the guide ridge (613) to be inserted and slide. The cross-sectional shapes of the guide ridge (613) and the guide groove (6212) are both dovetail-shaped.

3. A zinc oxide arrester according to claim 1, characterized in that: The limiting components (64) are a plurality of elastic abutment rings (641) fixedly mounted on the inner walls of the upper half shell (61) and the lower half shell (62). The inner walls of the upper half shell (61) and the lower half shell (62) are provided with limiting grooves (611) for the elastic abutment rings (641) to be embedded and fixed. The inner side surfaces of the elastic abutment rings (641) can be tightly abutted against the outer peripheral surface of the silicone rubber jacket (1).

4. A substation, characterized in that: It comprises a box body (8), a box door (9) arranged on the box body (8), and a zinc oxide lightning arrester as claimed in any one of claims 1 to 3, wherein a distribution room for installing the zinc oxide lightning arrester is arranged in the box body (8).

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