Explosion-proof and moisture-proof lightning arrester

Abstract

The utility model discloses an explosion-proof and moisture-proof lightning arrester, the lightning arrester comprises a resistor disc core body and a porcelain jacket, both ends of the resistor disc core body are provided with electrodes, the electrodes are sleeved with annular sheets, the upper part of the annular sheet at the upper end of the resistor disc core body is provided with a first sealing layer, and the upper part of the annular sheet at the lower end of the resistor disc core body is provided with a second sealing layer. A second sealing layer is arranged at the lower part of the annular thin sheet at the lower end of the resistor disc core body; the ceramic outer sleeve is arranged outside the resistor disc core body, and a cavity is formed between the resistor disc core body and an inner cavity of the ceramic outer sleeve; a flange is arranged at the bottom of the porcelain outer sleeve, a plurality of pressure releasing grooves are formed in the bottom of the flange, and a plurality of supporting parts are evenly arranged on the periphery of the bottom of the flange. The lightning arrester provided by the utility model has good explosion-proof performance and moisture-proof performance, can effectively prevent the lightning arrester from being damped and aged when the lightning arrester runs outdoors for a long time, can also prevent the lightning arrester from generating comminuted bursting when the lightning arrester breaks down, and reduces the harm to the safety of power line equipment and personal safety.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lightning arrester technical field especially relates to a kind of explosion-proof moisture-proof lightning arrester. BACKGROUND

[0002] The current porcelain sheath lightning arrester, mostly sealed washer is used on the upper and lower ends of lightning arrester to seal the lightning arrester, in order to ensure sealing performance, lightning arrester bottom fitting is usually designed only bolt hole. Porcelain sheath lightning arrester is prone to damp failure during long-term operation, and explosion after failure will endanger equipment and personal safety, and its main reason is that the structure of porcelain sheath lightning arrester generally exists two problems. On the one hand, with the increase of operation time, sealing washer gradually ages and cracks, and then the sealing effect of lightning arrester is invalid, so that water vapor enters the inside of porcelain sheath lightning arrester, and causes lightning arrester damp aging;On the other hand, after lightning arrester failure, the heat generated by zinc oxide resistor disc causes high-temperature and high-pressure gas inside, and the completely sealed lightning arrester will be exploded under the action of high-temperature and high-pressure gas, so that lightning arrester fragments fall into the vicinity of line, which causes certain hidden danger to the safe operation of other electrical equipment and personal safety. SUMMARY

[0003] The utility model provides a kind of explosion-proof moisture-proof lightning arrester, improve the sealing performance of lightning arrester while improving explosion-proof performance, effectively improve the service life and safe operation level of porcelain sheath lightning arrester.

[0004] In order to realize the above-mentioned purpose, the utility model embodiment provides a kind of explosion-proof moisture-proof lightning arrester, including resistor disc core body and porcelain sheath, the both ends of the resistor disc core body are equipped with electrode, and the ring-shaped sheet is set on the electrode, the upper part of the ring-shaped sheet of resistor disc core body upper end is equipped with first sealing layer, the lower part of the ring-shaped sheet of resistor disc core body lower end is equipped with second sealing layer;The outside of the resistor disc core body is equipped with the porcelain sheath, and the cavity is formed between the resistor disc core body and the inner chamber of the porcelain sheath;The bottom of the porcelain sheath is equipped with flange, multiple pressure release grooves are set in the bottom of the flange, and multiple support portions are evenly set in the bottom of the flange.

[0005] Further, the electrode is a convex electrode, the inner diameter of the ring-shaped sheet is equal to the outer diameter of the convex part of the electrode, and the outer diameter of the ring-shaped sheet is equal to the inner diameter of the inner chamber of the porcelain sheath.

[0006] Further, the upper end of the resistor disc core body is equipped with first electrode, and the lower end of the resistor disc core body is equipped with second electrode;The upper part of the first electrode is equipped with bolt hole, the first sealing layer completely fills the cavity in the upper part of the resistor disc core body, and the second sealing layer is tightly bonded between the ring-shaped sheet of the lower end of the resistor disc core body and the inner wall of the porcelain sheath.

[0007] Further, the first sealing layer is silicone rubber, and the second sealing layer is silicone glue.

[0008] Further, the diameter of the inner wall of the porcelain sleeve is greater than the outer diameter of the resistance chip core.

[0009] Further, the thickness of the annular sheet is 1-3 mm.

[0010] Further, the annular sheet is an annular ceramic sheet.

[0011] Further, the number of the pressure release grooves is 3-6, and the number of the support portions is 3-6.

[0012] Further, the resistance chip core comprises a plurality of zinc oxide resistance chips stacked.

[0013] Further, a spring is arranged between the bottom of the second electrode and the flange.

[0014] Compared with the prior art, the anti-explosion and moisture-proof lightning arrester has the following advantages:

[0015] (1) Good moisture-proof performance. The upper and lower sealing layers are arranged at the two ends of the zinc oxide resistance chip core, so that the zinc oxide resistance chip core is always in a sealed state in the inner cavity of the porcelain sleeve, and the porcelain sleeve lightning arrester has good moisture-proof performance; the upper sealing layer is formed by injecting liquid silicone rubber, and the lower sealing layer is formed by injecting silicone glue, the silicone glue can fix the annular ceramic sheet on the zinc oxide resistance chip core, the liquid silicone rubber and the silicone glue have good moisture-proof and waterproof performance, can effectively prevent dust, water vapor, moisture and other substances from entering, avoid the zinc oxide resistance chip core from being deteriorated due to moisture, and further improve the moisture-proof performance of the porcelain sleeve lightning arrester.

[0016] (2) Good explosion-proof performance. A plurality of pressure release grooves are arranged at the bottom of the flange, and a plurality of support portions are uniformly arranged around the bottom of the flange, when the lightning arrester is installed on the cross arm, the support portions are in contact with the cross arm, and there is a cavity between the pressure release grooves and the cross arm to form a pressure release channel. When the lightning arrester fails, the heat generated by the zinc oxide resistance chip core forms high-temperature and high-pressure gas in the cavity inside the porcelain sleeve, which breaks through the annular ceramic sheet and then forms a release channel through the pressure release grooves at the bottom of the flange to release the pressure, which can effectively avoid the porcelain sleeve lightning arrester from being crushed and exploded when it fails, and reduce the harm to the safety of power line equipment and personal safety. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structure schematic view of one preferred embodiment of the anti-explosion and moisture-proof lightning arrester provided by the utility model;

[0018] Figure 2 is another preferred embodiment of the structure schematic diagram of the explosion-proof moisture-proof lightning arrester provided by the utility model;

[0019] Figure 3 is the partial enlarged schematic diagram of one preferred embodiment of the explosion-proof moisture-proof lightning arrester provided by the utility model;

[0020] Figure 4 is the cross-sectional plan view of the explosion-proof moisture-proof lightning arrester provided by the utility model;

[0021] In the drawings, the reference signs are as follows

[0022] 1, bolt hole; 2, annular sheet; 21, first sealing layer; 22, second sealing layer; 3, electrode; 31, first electrode; 32, second electrode; 4, resistance sheet core body; 5, cavity; 6, porcelain outer sleeve; 7, flange; 71, pressure release groove; 72, support part; 8, spring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without making creative efforts fall within the protection scope of the utility model.

[0024] In the description of the present application, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third" and the like can be explicitly or implicitly included one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0025] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For the person skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In the description of the present application, it should be noted that, unless otherwise defined, all technical and scientific terms used in the present application are the same as the meanings commonly understood by those skilled in the art. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] Please refer to Figure 1 , Figure 1 is a preferred embodiment of a structure diagram of an explosion-proof and moisture-proof lightning arrester provided by the present application. The explosion-proof and moisture-proof lightning arrester comprises a resistance sheet core 4 and a porcelain outer sleeve 6. Both ends of the resistance sheet core 4 are provided with electrodes 3, and the electrodes 3 are both provided with annular sheets 2. The upper part of the annular sheet 2 at the upper end of the resistance sheet core 4 is provided with a first sealing layer 21, and the lower part of the annular sheet 2 at the lower end of the resistance sheet core 4 is provided with a second sealing layer 22. The outside of the resistance sheet core 4 is provided with the porcelain outer sleeve 6, and a cavity 5 is formed between the resistance sheet core 4 and the inner cavity of the porcelain outer sleeve 6. The bottom of the porcelain outer sleeve 6 is provided with a flange 7, a plurality of pressure release grooves 71 are formed in the bottom of the flange 7, and a plurality of support portions 72 are uniformly arranged around the bottom of the flange 7.

[0028] Specifically, the present application provides an explosion-proof and moisture-proof lightning arrester, which comprises a resistance sheet core 4 and a porcelain outer sleeve 6. The upper and lower ends of the resistance sheet core 4 are both provided with electrodes 3, and the upper and lower electrodes are both provided with annular sheets 2. The upper part of the annular sheet 2 at the upper end of the resistance sheet core 4 is provided with a first sealing layer 21, and the lower part of the annular sheet 2 at the lower end of the resistance sheet core 4 is provided with a second sealing layer 22. The first sealing layer 21 and the second sealing layer 22 can isolate the resistance sheet core 4 from the external environment. The outside of the resistance sheet core 4 is provided with the porcelain outer sleeve 6, and a cavity 5 is formed between the resistance sheet core 4 and the inner cavity of the porcelain outer sleeve 6. The bottom of the porcelain outer sleeve 6 is provided with a flange 7, a plurality of pressure release grooves 71 are formed in the bottom of the flange 7, and a plurality of support portions 72 are uniformly arranged around the bottom of the flange 7. When the porcelain outer sleeve lightning arrester is installed on the cross arm, it is directly in contact with the support portions 72, ensuring that the pressure release grooves 71 at the bottom of the flange 7 are not closed after the flange 7 at the bottom of the porcelain outer sleeve lightning arrester is installed on the cross arm, guaranteeing the explosion-proof performance of the porcelain outer sleeve lightning arrester after failure, and avoiding the occurrence of explosive pulverization of the porcelain outer sleeve lightning arrester.

[0029] It should be noted that Figure 1 shown is a lightning arrester with an external gap. Please refer to Figure 2 , Figure 2 is a structure diagram of another preferred embodiment of an explosion-proof and moisture-proof lightning arrester provided by the present application. Figure 2It is shown that a gapless lightning arrester.

[0030] The utility model discloses an upper sealing layer and lower sealing layer are arranged at the both ends of the resistance chip core body, so that the resistance chip core body is always in a sealed state in the inner cavity of the porcelain outer sleeve, the moisture-proof performance of the porcelain outer sleeve lightning arrester is ensured, dust, water vapor, moisture and other substances from the outside can be effectively prevented from entering, the resistance chip core body is prevented from being dampened and deteriorated, and the moisture-proof performance of the porcelain outer sleeve lightning arrester is further improved. When the lightning arrester is installed on the cross arm, the support portion is in contact with the cross arm, and the cavity between the pressure release groove and the cross arm forms a pressure release channel. When the lightning arrester fails, the heat generated by the resistance chip core body makes the cavity in the porcelain outer sleeve form high-temperature and high-pressure gas, which breaks through the annular sheet and then forms a release channel through the pressure release groove at the bottom of the flange to release pressure, so that the porcelain outer sleeve lightning arrester can be effectively prevented from being crushed and burst when failing, and the harm to the safety of power line equipment and personal safety is reduced.

[0031] In another preferred embodiment, the electrode 3 is a convex electrode, the inner diameter of the annular sheet 2 is equal to the outer diameter of the convex part of the electrode 3, and the outer diameter of the annular sheet 2 is equal to the inner diameter of the inner cavity of the porcelain outer sleeve 6.

[0032] Specifically, refer to Figure 3 and Figure 4 , Figure 3 is a partial enlarged schematic view of one preferred embodiment of the explosion-proof and moisture-proof lightning arrester provided by the utility model, Figure 4 is a sectional view of the explosion-proof and moisture-proof lightning arrester provided by the utility model. In the embodiment, the electrode 3 is a convex electrode, the annular sheet 2 is sleeved on the convex part of the convex electrode, the inner diameter of the annular sheet 2 is equal to the outer diameter of the convex part of the electrode 3, and the outer diameter of the annular sheet 2 is equal to the inner diameter of the inner cavity of the porcelain outer sleeve 6.

[0033] In still another preferred embodiment, the upper end of the resistance chip core body 4 is provided with a first electrode 31, and the lower end of the resistance chip core body 4 is provided with a second electrode 32; the upper part of the first electrode 31 is provided with a bolt hole 1, the first sealing layer 21 completely fills the cavity in the upper part of the resistance chip core body 4, and the second sealing layer 22 tightly bonds the annular sheet 2 at the lower end of the resistance chip core body 4 and the inner wall of the porcelain outer sleeve 6.

[0034] Specifically, the upper end of the resistance chip body 4 is provided with a first electrode 31, and the lower end of the resistance chip body 4 is provided with a second electrode 32. The upper part of the first electrode 31 is provided with a bolt hole 1, liquid silicone rubber is injected into the upper part of the resistance chip body 4 through the bolt hole 1 to form a first sealing layer 21, the first sealing layer 21 completely fills the cavity in the upper part of the resistance chip body 4, and prevents water vapor from entering the inside of the resistance chip body 4 through the bolt hole. The lower part of the annular sheet 2 at the lower end of the second electrode 32 is injected with silicone glue between the inner cavity of the porcelain outer sleeve 6 to form a second sealing layer 22, and the second sealing layer 22 tightly bonds the annular sheet 2 at the lower end of the resistance chip body 4 and the inner wall of the porcelain outer sleeve 6.

[0035] As a preferred solution, the first sealing layer 21 is silicone rubber, and the second sealing layer 22 is silicone glue.

[0036] Specifically, in the embodiment, the first sealing layer 21 is silicone rubber, and the second sealing layer 22 is silicone glue. Because the main purpose of the first sealing layer 21 is to fill, the second sealing layer 22 also needs to have a bonding effect to bond and fix the annular sheet 2 at the bottom, and silicone rubber does not have a bonding effect, so the second sealing layer 22 adopts silicone glue, which can fix the annular sheet 2 on the resistance chip body 4. The first sealing layer 21 and the second sealing layer 22 isolate the resistance chip body 4 from the external environment, and the liquid silicone rubber and the silicone glue both have good moisture-proof and waterproof performance, which can effectively prevent dust, water vapor, moisture and other substances in the external environment from entering, avoid the zinc oxide resistance chip body from being damp and deteriorated, and thus can ensure that the porcelain outer sleeve lightning arrester has good moisture-proof performance.

[0037] As a preferred solution, the diameter of the inner wall of the porcelain outer sleeve 6 is greater than the outer diameter of the resistance chip body 4.

[0038] Specifically, in the embodiment, the diameter of the inner wall of the porcelain outer sleeve 6 is greater than the outer diameter of the resistance chip body 4, so that a cavity 5 is formed between the resistance chip body 4 and the inner cavity of the porcelain outer sleeve 6.

[0039] As a preferred solution, the thickness of the annular sheet 2 is 1-3 mm.

[0040] As a preferred solution, the annular sheet 2 is an annular ceramic sheet.

[0041] Specifically, in the embodiment, the thickness of the annular sheet 2 is 1-3 mm, and the annular sheet 2 is an annular ceramic sheet, which isolates the internal cavity of the porcelain outer sleeve from the external environment. Due to the brittleness of the ceramic material, it can be used as a pressure release point after the failure of the lightning arrester.

[0042] As a preferred solution, the number of pressure release grooves 71 is 3-6, and the number of support portions 72 is 3-6.

[0043] Specifically, the number of the pressure release grooves 71 at the bottom of the flange 7 is 3-6, and the number of the support portions 72 at the bottom of the flange 7 is 3-6, and the number of the pressure release grooves 71 does not need to be equal to the number of the support portions 72.

[0044] As a preferred solution, the resistance chip core 4 comprises a plurality of zinc oxide resistance chips stacked.

[0045] As a preferred solution, a spring 8 is further arranged between the bottom of the second electrode 32 and the flange 7.

[0046] Specifically, the spring 8 is arranged between the bottom of the second electrode 32 and the flange 7 in the embodiment, for pressing the inner resistance chip core.

[0047] The utility model discloses a kind of explosion-proof moisture-proof arresters, with good moisture-proof performance and explosion-proof performance. By being provided with upper sealing layer and lower sealing layer at the both ends of zinc oxide resistance chip core, zinc oxide resistance chip core is always in sealed state in the inner cavity of porcelain outer sleeve, ensure that porcelain outer sleeve arrester has good moisture-proof performance;Wherein, upper sealing layer is formed by injection liquid silicone rubber, lower sealing layer is formed by injection silicone glue, silicone glue can be fixed annular ceramic sheet on zinc oxide resistance chip core, liquid silicone rubber and silicone glue all have good moisture-proof waterproof performance, can effectively prevent the dust, moisture, humidity and other substances of outside, avoid zinc oxide resistance chip core damp deterioration, further improve the moisture-proof performance of porcelain outer sleeve arrester. By designing multiple pressure release grooves at the bottom of flange and being evenly provided with multiple support portions around the bottom of flange, when arrester is installed on cross arm, support portion is contacted with cross arm, and there is cavity between pressure release groove and cross arm to form pressure release channel. When arrester fails, the heat generated by zinc oxide resistance chip core makes the cavity inside porcelain outer sleeve form high-temperature high-pressure gas, breaks annular ceramic sheet, and then forms release channel through the pressure release groove at the bottom of flange to release pressure, can effectively avoid porcelain outer sleeve arrester to occur pulverization burst when fault, reduce the harm to power line equipment safety and personal safety.

[0048] The above is the preferred embodiment of the utility model, it should be pointed out that, for ordinary skilled person in the art, without departing from the principle of the utility model, can make a number of improvements and refinements, these improvements and refinements also be considered as the protection scope of the utility model.

Claims

1. An explosion-proof and moisture-proof lightning arrester, characterized by comprising: The resistance chip comprises a resistance chip core and a porcelain outer sleeve, both ends of the resistance chip core are provided with electrodes, and both the electrodes are sleeved with annular sheets, the upper part of the annular sheet on the upper end of the resistance chip core is provided with a first sealing layer, and the lower part of the annular sheet on the lower end of the resistance chip core is provided with a second sealing layer; the outside of the resistance chip core is provided with the porcelain outer sleeve, and a cavity is formed between the resistance chip core and the inner cavity of the porcelain outer sleeve; the bottom of the porcelain outer sleeve is provided with a flange, the bottom of the flange is provided with a plurality of pressure release grooves, and the bottom of the flange is uniformly provided with a plurality of support portions around.

2. The explosion-proof and moisture-proof lightning arrester according to claim 1, wherein The electrode is a convex electrode, the inner diameter of the annular sheet is equal to the outer diameter of the convex part of the electrode, and the outer diameter of the annular sheet is equal to the inner diameter of the inner cavity of the porcelain outer sleeve.

3. The explosion-proof and moisture-proof lightning arrester according to claim 2, wherein The upper end of the resistance chip core is provided with a first electrode, and the lower end of the resistance chip core is provided with a second electrode; the upper part of the first electrode is provided with a bolt hole, the first sealing layer completely fills the cavity on the upper part of the resistance chip core, and the second sealing layer tightly bonds the annular sheet on the lower end of the resistance chip core and the inner wall of the porcelain outer sleeve.

4. The explosion-proof and moisture-proof lightning arrester according to claim 3, wherein The first sealing layer is silicone rubber, and the second sealing layer is silicone glue.

5. The explosion-proof and moisture-proof lightning arrester according to claim 4, wherein The diameter of the inner wall of the porcelain outer sleeve is greater than the outer diameter of the resistance chip core.

6. The explosion-proof and moisture-proof lightning arrester according to claim 5, wherein The thickness of the annular sheet is 1-3 mm.

7. The explosion-proof and moisture-proof lightning arrester according to claim 6, wherein The annular sheet is an annular ceramic sheet.

8. The explosion-proof and moisture-proof lightning arrester according to claim 7, wherein The number of the pressure release grooves is 3-6, and the number of the support portions is 3-6.

9. The explosion-proof and moisture-proof lightning arrester according to claim 8, wherein The resistance chip core comprises a plurality of stacked zinc oxide resistance chips.

10. The explosion-proof and moisture-proof lightning arrester according to claim 9, wherein The bottom of the second electrode and the flange are further provided with a spring.

Images