Outdoor gapless metal oxide lightning protection device

Abstract

The utility model provides an outdoor gapless metal oxide lightning protection device, which comprises an insulating shell with an opening at the upper end and a limiting circular groove at the lower end; a thin-wall fastener is coated at an opening at the upper end of the insulating shell; the first conduction piece comprises a first nut and a first screw rod, and the first screw rod penetrates out of the thin-wall fastener and is in insulation connection with the thin-wall fastener; the second conduction piece comprises a second nut and a second screw rod, and the second screw rod penetrates out of the limiting circular groove through the functional hole and is fixed; the resistor disc is concentrically arranged between the first conduction piece and the second conduction piece and is in contact with the first conduction piece and the second conduction piece; the connecting end of the cable is connected with the part, penetrating out of the thin-wall fastener, of the first screw rod; and the packaging cap is connected with the end part of the first screw rod. According to the utility model, a lightning protection device structure which is more suitable for outdoor operation is redesigned, so that the whole lightning protection device has higher-grade insulation, waterproof and dustproof effects and the like, can be independently installed outdoors without an additional outer box, and is safer and more reliable in operation.

Description

Technical Field

[0001] This utility model relates to the field of surge protector technology, specifically to an outdoor gapless metal oxide surge protector. Background Technology

[0002] Gapless metal oxide surge arresters are surge arresters composed of nonlinear metal oxide resistors connected in series and / or parallel, without parallel or series discharge gaps. They are mainly installed in power lines. The nonlinear metal oxide resistors have nonlinear volt-ampere characteristics, exhibiting low resistance under overvoltage conditions, thus limiting overvoltage between the arrester terminals, while exhibiting high resistance under normal power frequency voltage. The surge arrester is connected in parallel to the line; when the voltage applied across it exceeds the resistor's threshold voltage, the resistor quickly conducts, thus absorbing the surge current in the line system.

[0003] Currently, most outdoor surge protectors are modified from indoor track-mounted surge protectors. They achieve partial insulation, waterproofing, and dustproofing by simply adding an explosion-proof enclosure or box inside the distribution panel or control cabinet, or by changing the connection method from screw crimping to bolt connection, or by reducing the voltage of the surge protector while keeping its shape and reducing its size.

[0004] However, these outdoor surge protectors, which are made through simple modifications, not only involve complicated procedures and long production cycles, but also lack high-level insulation, waterproofing, and dustproofing, making them unable to operate safely and reliably outdoors, especially in extreme environments where outdoor power and communication systems are located.

[0005] It should be noted that this section is intended to provide background or context for the embodiments of this disclosure set forth in the claims. The description herein does not constitute an admission that it is prior art simply because it is included in this section. Utility Model Content

[0006] This utility model provides an outdoor gapless metal oxide surge protector to solve the problem that outdoor surge protectors, which are simply modified from indoor surge protectors, do not have high-level insulation, waterproof and dustproof effects.

[0007] This utility model embodiment provides an outdoor gapless metal oxide surge protector, comprising:

[0008] An insulating shell is a hollow cylindrical structure with an opening at the top and a limiting groove at the bottom, the limiting groove having a functional hole; a thin-walled fastener is wrapped around the opening at the top of the insulating shell.

[0009] A first conducting member is arranged in the insulating shell and comprises a first screw nut and a first screw rod, the first screw rod penetrates the thin-wall fastener and is insulatedly connected with the thin-wall fastener; the first screw rod is sleeved with a compression spring, and two ends of the compression spring are respectively abutted with the first screw nut and the thin-wall fastener;

[0010] A second conducting member is arranged in the insulating shell and comprises a second screw nut and a second screw rod, the second screw rod penetrates the limiting circular groove through the functional hole and is fixed;

[0011] A resistance sheet is concentrically arranged between the first conducting member and the second conducting member and is in contact with each other;

[0012] A cable is connected with the part of the first screw rod penetrating the thin-wall fastener;

[0013] A packaging cap is in a hollow circular arc top structure, is connected with the end of the first screw rod, and is packaged by an insulating packaging material after containing the connecting end of the cable.

[0014] As a preferred mode of the utility model, further comprising:

[0015] Two voltage-equalizing thickness-adjusting circular electrodes are in a flat-bottomed bowl structure, are concentrically arranged on two sides of the resistance sheet respectively, and the flat bottom of one side is abutted with the resistance sheet, and the flat bottom of the other side is abutted with the first screw nut or the second screw nut.

[0016] As a preferred mode of the utility model, a large annular buffer soft pad is arranged between the upper end opening of the insulating shell and the thin-wall fastener, and an annular insulating pad is concentrically arranged in the middle of the large annular buffer soft pad; the first screw rod penetrates the annular insulating pad and the thin-wall fastener after being sleeved with a T-shaped insulating pipe.

[0017] As a preferred mode of the utility model, the connecting end of the cable is provided with an O-shaped terminal; the cable is connected with the first screw rod through the O-shaped terminal and is led out through a first flat nut arranged on the first screw rod.

[0018] As a preferred mode of the utility model, a small annular buffer soft pad is arranged between the second screw nut and the insulating shell, and the second screw rod penetrates the small annular buffer soft pad and the functional hole in sequence.

[0019] As a preferred mode of the utility model, further comprising:

[0020] A fixing support is arranged at the part of the second screw rod penetrating the limiting circular groove; the fixing support comprises an L-shaped support and a mounting plate, one end of the L-shaped support is connected with the second screw rod, and the other end is connected with the mounting plate.

[0021] As the preferred mode of the utility model, the mounting plate is a flat plate structure, and mounting holes are arranged at both ends thereof.

[0022] The utility model discloses an outdoor gapless metal oxide lightning protection device, which is more suitable for outdoor operation, and the structure of the lightning protection device is redesigned, the first conducting part is connected with the insulating shell and the thin-wall fastener in an insulating mode, a hollow circular arc top structure packaging cap is arranged at the end of the first conducting part, and an insulating packaging material is injected into the packaging cap, so that the lightning protection device has high insulation, waterproof and dustproof effects, can be independently installed outdoors without an additional outer box, and is safe and reliable in operation, can realize all-scene protection from direct lightning to induced lightning, and ensures stable operation of outdoor power supply, communication and other systems in extreme environments.

[0023] In addition, the utility model has simple manufacturing procedures and greatly shortens the manufacturing period. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the drawings without creative labor for those skilled in the art.

[0025] Figure 1 The utility model provides the three -dimensional structure schematic diagram of outdoor gapless metal oxide lightning protection device for the embodiment of the utility model;

[0026] Figure 2 The utility model provides the main view structure schematic diagram of outdoor gapless metal oxide lightning protection device for the embodiment of the utility model;

[0027] Figure 3 For Figure 2 The section along A-A line in Fig.

[0028] Figure 4 The utility model provides the three -dimensional structure schematic diagram of insulating shell for the embodiment of the utility model;

[0029] Figure 5 The utility model provides the main view structure schematic diagram of insulating shell for the embodiment of the utility model;

[0030] Figure 6 For Figure 5 The section along B-B line in Fig.

[0031] Figure 7 The utility model provides the structure schematic diagram of the even pressure thickness round electrode for the embodiment of the utility model;

[0032] Figure 8The structure schematic diagram of the packaging cap is provided for the embodiment of the utility model.

[0033] Among them:

[0034] 1, packaging cap, 1-1, internal thread part, 2, cable, 3, thin-walled fastener, 4, insulating shell, 4-1, flange, 4-2, limit circular groove, 4-3, functional hole, 5, second conducting piece, 6, fixed support, 6-1, L-shaped support, 6-2, mounting plate, 7, mounting hole, 8, O-shaped terminal, 9, first flat nut, 10, T-shaped insulating tube, 11, annular insulating pad, 12, large annular buffer soft pad, 13, crimping spring, 14, first conducting piece, 15, voltage-sharing thickness-adjusting circular electrode, 16, resistance sheet, 17, small annular buffer soft pad, 18, second flat nut, 19, third flat nut, 20, square locking washer, 21, locking nut, 22, insulating packaging material. DETAILED DESCRIPTION

[0035] In order to make the person skilled in the art better understand the utility model scheme, below will combine the drawings in the embodiment of the utility model, the technical scheme in the embodiment of the utility model is described clearly and completely, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the utility model.

[0036] It should be noted that: similar signs and letters represent similar items in the following drawings, so once an item is defined in a drawing, it does not need to be further defined and explained in the subsequent drawings.

[0037] The following refers to Figures 1-8 The specific structure of the outdoor gapless metal oxide lightning protection device provided by the embodiment of the utility model is introduced in detail.

[0038] The outdoor gapless metal oxide lightning protection device provided by the embodiment of the utility model mainly includes an insulating shell 4, a first conducting piece 14, a second conducting piece 5, a resistance sheet 16, a cable 2 and a packaging cap 1.

[0039] Among them, the insulating shell 4 is a hollow cylindrical structure, usually a glass porcelain shell is used in practice, the upper end is open and has an outward flange 4-1, the lower end is provided with a ring-shaped limit circular groove 4-2, the limit circular groove 4-2 is provided with a functional hole 4-3 in the middle, which is specifically referred to Figures 4-6 At the same time, the upper end opening of the insulating shell 4 is also provided with a thin-walled fastener 3 made of metal material, which is tightly pressed against the upper end of the insulating shell 4 and the metal flange, and is fixed by tightly clamping the upper end flange 4-1 of the insulating shell 4.

[0040] The design of the thin-wall fastener 3 and the upper end flange 4-1 of the insulating shell 4 can realize the packaging of the components in the insulating shell 4.

[0041] The first conducting member 14 is arranged in the insulating shell 4 and includes a first screw nut and a first screw rod. The first screw nut is arranged downwardly, and the first screw rod penetrates the thin-wall fastener 3 and is insulatedly connected with the thin-wall fastener 3 as an overvoltage input end.

[0042] Preferably, a large annular buffer cushion 12 is arranged between the upper end opening of the insulating shell 4 and the thin-wall fastener 3, and an annular insulating pad 11 is further arranged concentrically in the large annular buffer cushion 12. The first screw rod of the first conducting member 14 penetrates the annular insulating pad 11 and the thin-wall fastener 3 after being sleeved with the T-shaped insulating tube 10.

[0043] The cooperation of the T-shaped insulating tube 10 and the annular insulating pad 11 can realize the isolation between the thin-wall fastener 3 and the first screw rod of the first conducting member 14, so as to avoid the electric shock caused by the charged thin-wall fastener 3.

[0044] The second conducting member 5 is also arranged in the insulating shell 4 and includes a second screw nut and a second screw rod. The second screw nut is arranged upwardly opposite to the first screw nut, and the second screw rod penetrates the limiting circular groove 4-2 and is fixed with the limiting circular groove 4-2 as a ground output discharge end through the functional hole 4-3.

[0045] Preferably, a small annular buffer cushion 17 is arranged between the second screw nut of the second conducting member 5 and the insulating shell 4, and the second screw rod penetrates the small annular buffer cushion 17 and the functional hole 4-3 in sequence.

[0046] The arrangement of the large annular buffer cushion 12 and the small annular buffer cushion 17 at the upper and lower ends of the insulating shell 4 can effectively buffer and reduce the hard-to-hard pressure, so as to avoid the damage of the insulating shell 4.

[0047] The resistance sheet 16 is arranged concentrically between the first conducting member 14 and the second conducting member and in contact with the first screw nut and the second screw nut on both sides. In the embodiment, the resistance sheet 16 refers to a nonlinear metal oxide resistance sheet.

[0048] In addition, the first screw rod sleeve is further sleeved with a crimping spring 13 in a compressed state, and the two ends of the crimping spring 13 are in abutment with the first screw nut and the thin-wall fastener 3, so as to tightly connect the components in the insulating shell 4. At the same time, the structure of the thin-wall fastener 3 and the upper end flange 4-1 of the insulating shell 4 can also cooperate with the deformation amount of the compression of the crimping spring 13 to realize the tight connection of the resistance sheet 16.

[0049] Preferably, two voltage-equalizing thickening circular electrodes 15 are further arranged in the insulating shell 4, which will be specifically described with reference to Figure 7As shown, it is a flat-bottomed bowl-shaped structure. Two equalizing thickness-adjusting circular electrodes 15 are arranged on the two sides of the resistance sheet 16 in a concentric and opposite manner, and the side with a flat bottom of each equalizing thickness-adjusting circular electrode 15 is in abutment with the resistance sheet 16, and the other side is in abutment with the first nut or the second nut.

[0050] Here, the design of the equalizing thickness-adjusting circular electrode 15 is added, which can not only achieve the effect of equalizing voltage, but also adjust the thickness of the resistance sheet 16 through the protruding height thereof, cooperate with the deformation amount of the pressure spring 13 to avoid the slight difference in the thickness of the resistance sheet 16, thereby being conducive to the application of the resistance sheet made of a formula with different energy requirements.

[0051] Meanwhile, the first conducting part 14 and the second conducting part 5 adopt the design of the nut screw, and the end in abutment with the equalizing thickness-adjusting circular electrode 15 is increased in contact area, which can disperse the pressure of the pressure spring 13 to prevent the resistance sheet 16 from being injured by excessive force, and can also achieve the effect of further equalizing voltage due to the increase in area.

[0052] The connecting end of the cable 2 is provided with an O-shaped terminal 8, so that the cable 2 is connected with the part of the first screw rod of the first conducting part 14 penetrating out of the thin-walled fastener 3 and is screwed out through the first flat nut 9 arranged on the first screw rod, and can be connected to the input end of the protected equipment or instrument.

[0053] The packaging cap 1 is connected with the end of the first screw rod of the first conducting part 14, and is packaged after containing the connecting end of the cable 2 through the insulating packaging material 22, and the complete insulation of the live part can be realized after the insulating packaging material 22 is solidified. Figure 8 As shown, the packaging cap 1 is a hollow circular arc top structure, and an inner threaded part 1-1 is arranged at the inner top portion, so that the packaging cap 1 is screwed and fixed with the first screw rod of the first conducting part 14 through the inner threaded part 1-1.

[0054] Further, the outdoor gapless metal oxide lightning protection device provided by the embodiment of the utility model further includes a fixing support 6 which is arranged at the part of the second screw rod of the second conducting part 5 penetrating out of the limiting circular groove 4-2 of the insulating shell 4. The fixing support 6 includes an L-shaped support 6-1 and a mounting plate 6-2, wherein one end of the L-shaped support 6-1 is connected with the second screw rod of the second conducting part 5 through the second flat nut 18 above and the third flat nut 19 below, and the other end is connected with the mounting plate 6-2. The mounting plate 6-2 is a flat plate structure and is arranged horizontally, and mounting holes 7 are arranged at two ends of the mounting plate 6-2 respectively.

[0055] Meanwhile, in order to realize the stable connection of the fixing support 6, the third flat nut 19 is further locked below by a locking nut 21, and a square locking washer 20 is further arranged between the third flat nut 19 and the locking nut 21.

[0056] Through setting the fixed support 6, the whole product can be fixed in a suitable position, so as to maintain use.

[0057] In summary, the utility model discloses an outdoor gapless metal oxide lightning protection device, redesigns the lightning protection device structure more suitable for outdoor operation, through the insulation connection of first conducting piece, insulating shell and thin wall fastener, hollow circular arc top structure package cap is arranged at the end of first conducting piece simultaneously, and the inside of package cap is injected with insulation packaging material, so that the whole lightning protection device has higher grade insulation, waterproof and dustproof effect, can be installed independently outdoors without adding another outer box, and operation is safer and more reliable, can realize all -scene protection from direct lightning to induction lightning, and guarantee the stable operation of outdoor power, communication and other systems in extreme environment.

[0058] In addition, the utility model has simple manufacturing procedure, and greatly shortens the manufacturing period.

[0059] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" is based on the orientation or position relationship shown in the drawing, or the orientation or position relationship of the utility model product when it is usually placed, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model.

[0060] In addition, the terms "first", "second", "third" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the embodiments of the present disclosure, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0061] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected, can be mechanically connected, or can be electrically connected, can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0062] In the above embodiments of the utility model, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0063] The above is only the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An outdoor gapless metal oxide lightning arrester, characterized by, The utility model relates to an electric resistance box, including: An insulating shell is a hollow cylindrical structure, the upper end of which is open, and the lower end is provided with a limiting circular groove, and a functional hole is arranged on the limiting circular groove; a thin-walled fastener is wrapped around the upper end opening of the insulating shell; A first conducting part is arranged in the insulating shell, which includes a first nut and a first screw rod, the first screw rod passes through the thin-walled fastener and is insulatedly connected with the thin-walled fastener; a compression spring is sleeved on the first screw rod, and the two ends of the compression spring are respectively in abutment with the first nut and the thin-walled fastener; A second conducting part is arranged in the insulating shell, which includes a second nut and a second screw rod, the second screw rod passes through the functional hole and is fixed; A resistance sheet is concentrically arranged between the first conducting part and the second conducting part and is in contact with each other; An electric cable is connected at one end with the part of the first screw rod that passes through the thin-walled fastener; An encapsulation cap is a hollow circular arc top structure, which is connected with the end of the first screw rod, and after containing the connected end of the electric cable, it is encapsulated by an insulating encapsulation material.

2. The outdoor gapless metal oxide lightning arrestor of claim 1, wherein, Further including: Two equalizing thickness-adjusting circular electrodes are flat-bottomed bowl-shaped structures, which are concentrically arranged on both sides of the resistance sheet, and the flat bottom side is in abutment with the resistance sheet, and the other side is in abutment with the first nut or the second nut.

3. The outdoor gapless metal oxide lightning arrestor of claim 1, wherein, A large annular buffer cushion is arranged between the upper end opening of the insulating shell and the thin-walled fastener, and an annular insulating pad is concentrically arranged in the middle of the large annular buffer cushion; the first screw rod passes through the annular insulating pad and the thin-walled fastener after being sleeved with a T-shaped insulating tube.

4. The outdoor gapless metal oxide lightning arrestor of claim 1, wherein, The connected end of the electric cable is provided with an O-shaped terminal; the electric cable is connected with the first screw rod through the O-shaped terminal and is led out through a first flat nut arranged on the first screw rod.

5. The outdoor gapless metal oxide lightning arrestor of claim 1, wherein, A small annular buffer cushion is arranged between the second nut and the insulating shell, and the second screw rod passes through the small annular buffer cushion and the functional hole in sequence.

6. The outdoor gapless metal oxide lightning arrester according to any one of claims 1 to 5, characterized in that Further including: A fixing support is arranged on the part of the second screw rod that passes through the limiting circular groove; It includes an L-shaped support and a mounting plate, one end of the L-shaped support is connected with the second screw rod, and the other end is connected with the mounting plate.

7. The outdoor gapless metal oxide lightning arrestor of claim 6, wherein The mounting plate is a flat plate structure, and mounting holes are arranged at both ends of the mounting plate respectively.

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