CN210575323U

CN210575323U - Dampproof explosion-proof zinc oxide arrester

Info

Publication number: CN210575323U
Application number: CN201922302364.6U
Authority: CN
Inventors: 陈永佳
Original assignee: Shaanxi Institute of Technology
Current assignee: Shaanxi Institute of Technology
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-05-19
Anticipated expiration: 2029-12-19

Abstract

The utility model discloses a dampproofing explosion-proof zinc oxide arrester, including arrester body, dampproofing indicating device to and arrester explosion-proof equipment, the arrester body includes insulating overcoat, zinc oxide resistance, telluric electricity field, high tension electrode, ground screw and high tension screw, and dampproofing indicating device is including dampproofing indication work return circuit and concatenating first wire and second wire in the dampproofing indication work return circuit, first wire stretches into insulating overcoat along the through-hole and exposes in the one end of wire cover and stretch into insulating overcoat along the through-hole and expose and be connected with the insulating part that absorbs water between the one end of wire cover with the second wire. The utility model discloses be provided with dampproofing work return circuit and arrester explosion-proof equipment of instructing, when having the aqueous vapor to enter in insulating overcoat, the insulating part that absorbs water and is in moist state, consequently makes first wire and second wire switch-on with the help of adsorbing the water on the insulating part that absorbs water, consequently dampproofing instruction work return circuit is in the route for instruct insulating overcoat aqueous vapor have or not.

Description

Dampproof explosion-proof zinc oxide arrester

Technical Field

The utility model belongs to the technical field of power equipment, concretely relates to dampproofing explosion-proof zinc oxide arrester.

Background

In the power system, the system works under the rated voltage under the normal condition, the voltage deviation is very small, all electrical equipment work normally, but when the system is struck by lightning and fails, the system voltage can be greatly increased, the grid voltage is higher than the normal voltage by several times or even dozens of times, all the system equipment under the condition can not bear the insulation, is broken down or even damaged, and the lightning arrester is used as a place at this time. A lightning arrester is a lightning protection device connected between a conductor and ground, usually in parallel with the protected device.

The zinc oxide arrester is a new type arrester developed in the seventies, is used for protecting various electrical equipment in an electric power system from being damaged by overvoltage, mainly comprises a zinc oxide piezoresistor, and has good protection performance.

The zinc oxide lightning arrester is high in resistance under normal working voltage, leakage current is only microampere level, the piezoresistor is equivalent to an insulator, no action is generated, and the zinc oxide lightning arrester is regarded as an open circuit for the ground. When crisis or lightning strike high voltage occurs, the zinc oxide arrester can act, the high voltage of lightning waves enables the piezoresistor to be broken down, the piezoresistor is changed into a conductor instantly, and lightning current flows into the ground through the piezoresistor, so that the current is led into the ground, the voltage on a power line can be controlled within a safety range, and the safety of electrical equipment is protected. After the piezoresistor is struck, the insulation state can be recovered; when the high voltage is removed, it recovers the high impedance state. Therefore, the zinc oxide arrester not only can be used for protecting atmosphere high voltage, but also can be used for protecting operation high voltage, and once abnormal voltage appears, the zinc oxide arrester plays a role, so that the power equipment can be effectively protected.

The reliability of the long-term operation of the zinc oxide arrester depends on the quality of the product and whether the product is reasonably selected. However, the explosion accident of the zinc oxide arrester happens frequently, and research and analysis from all aspects show that the explosion reason is 69% of manufacturing quality problems, 25% of improper operation and 6% of improper type selection. The reasons for influencing the product quality mainly include internal moisture, poor sealing, porcelain bushing pollution and the like. There is therefore a need for a zinc oxide arrester with a function to indicate internal moisture and reduce explosive damage forces.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that not enough among the above-mentioned prior art is directed against, provide a dampproofing explosion-proof zinc oxide arrester, the utility model has the advantages of simple structure and reasonable design, be provided with dampproofing indication work return circuit and arrester explosion-proof equipment, when having the aqueous vapor to enter in insulating overcoat, the insulating part that absorbs water and is in moist state, consequently makes first wire and second wire switch-on with the help of adsorbing the water on the insulating part that absorbs water, consequently dampproofing indication work return circuit is in the route for indicate insulating overcoat aqueous vapor have or not, indicating effect is good.

In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a dampproofing explosion-proof zinc oxide arrester which characterized in that: the lightning arrester comprises a lightning arrester body, a moisture-proof indicating device and a lightning arrester explosion-proof device, wherein the moisture-proof indicating device is arranged on the lightning arrester body, the lightning arrester body comprises an insulating outer sleeve, a zinc oxide resistor, a grounding electrode and a high-voltage electrode, the zinc oxide resistor is arranged in the insulating outer sleeve, the grounding electrode and the high-voltage electrode are respectively arranged at two ends of the zinc oxide resistor, the grounding electrode is connected with a grounding screw rod exposed out of the insulating outer sleeve, the high-voltage electrode is connected with a high-voltage screw rod exposed out of the insulating outer sleeve, the moisture-proof indicating device comprises a moisture-proof indicating working loop, a first conducting wire and a second conducting wire, a through hole for the first conducting wire and the second conducting wire to pass through is formed in the grounding screw rod, the first conducting wire and the second conducting wire both comprise a conducting wire core and a conducting wire sleeve, one end of the first conducting wire is connected with the moisture-proof, the other end of the second wire extends into the insulating outer sleeve along the through hole, and the wire core at the other end of the first wire is connected with the wire core at the other end of the second wire through the water-absorbing insulating part.

The moisture-proof explosion-proof zinc oxide arrester is characterized in that: the lightning arrester explosion-proof device is arranged between the insulating outer sleeve and the zinc oxide resistor and comprises an electric insulating gel layer, a soft cavity and a fiber layer which are sequentially arranged from inside to outside, and non-Newtonian fluid is filled in the soft cavity.

The moisture-proof explosion-proof zinc oxide arrester is characterized in that: the other end of the first lead is exposed out of the lead core of the lead sleeve, the other end of the second lead is exposed out of the lead core of the lead sleeve, and the lead core is respectively sleeved with an insulating protective sleeve, and the insulating protective sleeve is provided with a connecting hole for the water-absorbing insulating part to pass through.

The moisture-proof explosion-proof zinc oxide arrester is characterized in that: the working circuit comprises an indicator light and a power supply unit for supplying power to the indicator light.

The moisture-proof explosion-proof zinc oxide arrester is characterized in that: still including being hollow structure and dampproofing indicator panel, set up the screw rod hole that can supply to connect the ground screw rod to pass on the dampproofing indicator panel, screw rod hole and through-hole through connection, the one end of first wire and the one end of second wire are located dampproofing indicator panel, pilot lamp and power supply unit set up on dampproofing indicator panel.

The explosion-proof zinc oxide arrester is characterized in that: the first lead and the second lead further comprise metal wires arranged in the lead sleeve, and the yield strength of the metal wires is 60-180 MPa.

The moisture-proof explosion-proof zinc oxide arrester is characterized in that: the through hole is an inclined hole, an outlet and an inlet of the inclined hole are both positioned on the side wall of the grounding screw rod, and a sealing ring is arranged in the through hole.

The moisture-proof explosion-proof zinc oxide arrester is characterized in that: the water absorption insulating part comprises a water absorption insulating wire and a water absorption core wrapped on the water absorption insulating wire.

The moisture-proof explosion-proof zinc oxide arrester is characterized in that: the water-absorbing insulated wire is pure cotton degreased yarn loaded with salt particles.

The explosion-proof zinc oxide arrester is characterized in that: the water absorption core is oval.

Compared with the prior art, the utility model has the following advantage:

1. the utility model has the advantages of simple structure and reasonable design, realize and use convenient operation.

2. The utility model discloses set up dampproofing instruction work circuit, wherein first wire stretches into insulating overcoat and exposes into insulating overcoat and expose and be connected with the insulating part that absorbs water between the one end of wire sleeve and expose in the one end of wire sleeve with the second wire, when having the aqueous vapor to enter in insulating overcoat, the insulating part that absorbs water and is in moist state, consequently make first wire and second wire switch-on with the help of adsorbing the water on the insulating part that absorbs water, dampproofing instruction work circuit is in the route, be used for instructing insulating overcoat aqueous vapor have or not, excellent in use effect.

To sum up, the utility model has the advantages of simple structure and reasonable design, be provided with dampproofing work circuit and the arrester explosion-proof equipment of instructing, when having the aqueous vapor to enter in insulating overcoat, the insulating part that absorbs water is in moist state, consequently makes first wire and second wire switch-on with the help of the water that adsorbs on the insulating part that absorbs water, consequently dampproofing instruction work circuit is in the route for instruct having or not of insulating overcoat aqueous vapor, indicate effectually.

The technical solution of the present invention is further described in detail by the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of fig. 1.

Fig. 3 is an enlarged view of fig. 2 at a.

Fig. 4 is an enlarged view of fig. 3 at B.

Fig. 5 is a schematic structural view of the water-absorbing insulating member.

Fig. 6 is a schematic structural view of the ground screw.

Fig. 7 is a schematic structural diagram of the first conductive line or the second conductive line.

Description of reference numerals:

1-high pressure screw; 2-high voltage electrode; 3-a grounding screw rod;

4-ground electrode; 5, insulating the outer sleeve; 6-fiber layer;

7-a flexible chamber; 8-an electrically insulating gel layer; 9-zinc oxide resistance;

10-moisture proof indicator board; 11-indicator light; 12 — a first conductive line;

13 — a second conductive line; 14-a water-absorbing insulating member; 15-a power supply unit;

16-an insulating protective sleeve; 121-a wire sleeve; 122 — a wire;

123-a wire core; 31-a through hole; 32-a sealing ring;

141-water-absorbing insulated wire; 142-absorbent core. 17-screw cap.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and embodiments of the present invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 4, the utility model discloses a dampproofing explosion-proof zinc oxide arrester, its characterized in that: the utility model provides a dampproofing explosion-proof zinc oxide arrester which characterized in that: the lightning arrester comprises a lightning arrester body, a moisture-proof indicating device and an explosion-proof device, wherein the moisture-proof indicating device is arranged on the lightning arrester body, the lightning arrester body comprises an insulating outer sleeve 5, a zinc oxide resistor 9 arranged in the insulating outer sleeve 5, and a grounding electrode 4 and a high-voltage electrode 2 which are respectively arranged at two ends of the zinc oxide resistor 9, the grounding electrode 4 is connected with a grounding screw 3 exposed out of the insulating outer sleeve 5, the high-voltage electrode 2 is connected with the high-voltage screw 1 exposed out of the insulating outer sleeve 5, the moisture-proof indicating device comprises a moisture-proof indicating working loop, a first lead 12 and a second lead 13, the grounding screw 3 is provided with a through hole 31 for the first lead 12 and the second lead 13 to pass through, the first lead 12 and the second lead 13 both comprise a lead core 123 and a lead sleeve 121, one end of the first lead 12 is connected with the moisture-proof indicating working loop in series, and the other end of the first lead 12 extends into the insulating, one end of the second lead 13 is connected in series with the moisture-proof indication working circuit, the other end of the second lead 13 extends into the insulating outer sleeve 5 along the through hole 31, and the lead core 123 at the other end of the first lead 12 is connected with the lead core 123 at the other end of the second lead 13 through the water-absorbing insulating part 14.

In practical use, the insulating outer sleeve 5, the zinc oxide resistor 9 arranged in the insulating outer sleeve 5, the grounding electrode 4 and the high-voltage electrode 2 which are respectively arranged at two ends of the zinc oxide resistor 9, the grounding screw 3 and the high-voltage screw 1 form the zinc oxide lightning arrester.

The insulating protective sleeve 16 plays a role in preventing one end of the first conducting wire 12 exposed out of the conducting sleeve or one end of the second conducting wire 13 exposed out of the conducting sleeve from contacting with the grounding electrode 4, so that the first conducting wire 12 and the second conducting wire 13 are electrically conducted, and an indication error is caused.

When no water or air enters the insulating outer sleeve 5, the water-absorbing insulating part 14 is in an insulating state, the first lead 12 and the second lead 13 cannot be connected, and the moisture-proof indication working circuit is in an open circuit state.

When moisture enters the insulating outer sleeve 5, the water-absorbing insulating part 14 absorbs water and is in a wet state, and the water is a conductor, so that the first lead 12 and the second lead 13 are connected by means of the water absorbed on the water-absorbing insulating part 14, the moisture-proof indication working circuit is in a passage and is used for indicating whether the moisture of the insulating outer sleeve 5 exists or not, and the using effect is good.

As moisture sinks to gather, a moisture-proof indication device is provided at the position of the earth screw 3.

As shown in fig. 5, in actual use, the water-absorbing insulating member 14 includes a water-absorbing insulating wire 141 and a water-absorbing core 142 wrapped around the water-absorbing insulating wire. The water-absorbing insulating wire 141 is a pure cotton degreased yarn loaded with salt particles. The absorbent core 142 is made of bulky cloth. The absorbent core 142 is oval in shape.

In actual use, the water-absorbent insulating wire 141 is in a slender line shape, and the water-absorbent core 142 is in an oval shape. The water-absorbing insulated wire 141 has water absorption property and can be used for absorbing water vapor in the air, meanwhile, the water-absorbing insulated wire 141 can conduct the water vapor absorbed by the water-absorbing core 142 to the water-absorbing insulated wire 141, the water-absorbing insulated wire 141 with a slender line shape increases the conduction length of the water vapor, and the using effect is good.

Since the conductivity of the saline water with the mass ratio of 10% is the highest, the water-absorbing insulated wire 141 preferably uses pure cotton degreased yarn soaked in the saline water with the mass ratio of 10%, and the conductivity of the pure cotton degreased yarn loaded with salt particles after absorbing water is higher than that of the common yarn, so that the sensitivity of the moisture-proof indicating working loop is better.

In this embodiment, the water-absorbing core 142 is made of a bulky non-woven fabric made of long fibers, and the water-absorbing core 142 is oval, so as to increase the contact area between the water-absorbing core 142 and the air and increase the water absorption capacity of the water-absorbing core 142, thereby playing a role of a desiccant on one hand, and improving the conductivity of the first conducting wire 12 and the second conducting wire 13 in the presence of weak moisture on the other hand.

In practice, it may be determined during installation whether to add the absorbent core 142 as appropriate. If the water-absorbing core 142 is used in a humid place, the water-absorbing core 142 can be added, and on one hand, the water-absorbing core 142 can increase the water absorbing capacity and can play a role of a drying agent. If the climate is dry, the water absorbent core 142 can be removed to avoid the difficulty of water and air conduction.

In this embodiment, the arrester explosion-proof device is arranged between the insulating outer sleeve 5 and the zinc oxide resistor 9, the arrester explosion-proof device includes an electrical insulating gel layer 8, a flexible cavity 7 and a fiber layer 6, which are sequentially arranged from inside to outside, and the flexible cavity 7 is filled with a non-newtonian fluid.

The fibre layer 6 is a mesh glass fibre layer and the fibre layer 6 provides support strength for the electrically insulating gel layer 8 and the flexible chamber 7.

The soft cavity 7 is a rubber cavity or a silicon cavity, and when the flexible vacuum pump is actually used, the soft cavity 7 is a silicon cavity. The non-Newtonian fluid is a polyethylene glycol liquid containing silica particles, wherein the particle size of the silica particles is 10-50nm, the molecular weight of the polyethylene glycol is 600, and the mass fraction of the silica particles is 50% -80%.

The electrically insulating gel layer 8 is a silicone gel.

In actual use, the electrical insulating gel layer 8 is firstly contacted with the zinc oxide resistor 9, on one hand, the electrical insulating gel layer 8 plays a role in isolating oxygen; on the other hand, the electrical insulation gel layer 8 has elasticity and flexibility, when the zinc oxide resistor 9 explodes, the electrical insulation gel layer 8 is stressed and expanded and transmits the force to the soft cavity 7, so that the soft cavity 7 is prevented from being suddenly stressed at an explosion moment and cannot be gathered into a block capable of blocking the explosion impact force. The soft cavity 7 is filled with non-Newtonian fluid, and the non-Newtonian fluid is stressed and gathered to be firm, so that the effect of buffering explosion impact force is achieved, and the injury force of explosion is reduced.

In this embodiment, the operating circuit includes an indicator light 11 and a power supply unit 17 for supplying power to the indicator light 11. In actual use, the power supply unit 17 is a battery. The power supply unit 17, the indicator light 11, the first wire 12 and the second wire 13 form a series circuit. During practical use, a current amplifying circuit can be added into the moisture-proof indicating working circuit to amplify weak current.

In this embodiment, still including being hollow structure's dampproofing indicator board 10, set up the screw rod hole that can supply ground screw 3 to pass on the dampproofing indicator board 10, screw rod hole and through-hole 31 through connection, the one end of first wire 12 and the one end of second wire 13 are located dampproofing indicator board 10, pilot lamp 11 and power supply unit 15 set up on dampproofing indicator board 10.

During the in-service use, set up the screw rod hole that can pass ground screw 3 on the dampproofing indicator board 10, the hollow structure and the screw rod hole of dampproofing indicator board 10, the through-hole 31 through-connection on the ground screw 3. Therefore, the first wire 12 and the second wire 13 extend from the moisture-proof indicator board 10 into the ground screw 3, and the ground screw 3 is provided with a nut 32 for limiting the moisture-proof indicator board 10.

As shown in fig. 7, the first and second

conductive wires

12 and 13 further include a wire 122 disposed in the conductive wire sheath 121, and the yield strength of the wire 122 is 60MPa to 180 MPa.

The yield strength refers to a minimum stress for deforming the wire 122, the wire 122 will deform under an external force greater than the yield strength, and the wire 122 still maintains the deformation and cannot recover after the external force greater than the yield strength disappears. The metal wire 122 is added in the lead sleeve 121, so that the first lead 12 and the second lead 13 have certain hardness, are conveniently stretched into the grounding screw 3, can also keep shapes, cannot collapse and lie in the insulating outer sleeve 5, and increases the contact probability between the first lead and water vapor in the insulating outer sleeve 5. During the actual use, after grounding screw 3 and telluric electricity field 4 are connected, stretch into grounding screw 3 with first wire 12 and second wire 13 in, then adopt nut 17 to spacing dampproofing indicator board 10.

As shown in fig. 6, the through hole 31 is an inclined hole, and an outlet and an inlet of the inclined hole are both located on the side wall of the ground screw 3. Sealing rings 32 are arranged at the inlet position and the outlet position of the through hole 31, and the size of the sealing rings 32 is adaptive to the radial direction of the first lead wire 12 and the second lead wire 13. In practical use, because the end of the ground screw 3 contacts the ground electrode 4, the ground screw 3 is provided with a through hole 31 inclined to the axis thereof, and the outlet and the inlet of the through hole 31 are both located on the side wall of the ground screw 3, so that the first lead 12 and the second lead 13 smoothly extend into the insulating sheath 5.

Wherein those matters not described in detail in the specification are prior art known to those skilled in the art. The aforesaid, only be the embodiment of the utility model discloses an it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.

Claims

1. The utility model provides a dampproofing explosion-proof zinc oxide arrester which characterized in that: comprises a lightning arrester body, a moisture-proof indicating device arranged on the lightning arrester body and an explosion-proof device of the lightning arrester,

the lightning arrester body comprises an insulating outer sleeve (5), a zinc oxide resistor (9) arranged in the insulating outer sleeve (5), and a grounding electrode (4) and a high-voltage electrode (2) which are respectively arranged at two ends of the zinc oxide resistor (9), wherein the grounding electrode (4) is connected with a grounding screw rod (3) exposed out of the insulating outer sleeve (5), the high-voltage electrode (2) is connected with a high-voltage screw rod (1) exposed out of the insulating outer sleeve (5),

the moisture-proof indicating device comprises a moisture-proof indicating working circuit, a first lead (12) and a second lead (13), a through hole (31) for the first lead (12) and the second lead (13) to pass through is formed in the grounding screw rod (3), the first lead (12) and the second lead (13) both comprise a lead core (123) and a lead sleeve (121), one end of the first lead (12) is connected with the moisture-proof indicating working circuit in series, the other end of the first lead (12) extends into the insulating outer sleeve (5) along the through hole (31),

one end of the second lead (13) is connected with the moisture-proof indicating working circuit in series, the other end of the second lead (13) extends into the insulating outer sleeve (5) along the through hole (31), and the lead core (123) at the other end of the first lead (12) is connected with the lead core (123) at the other end of the second lead (13) through the water-absorbing insulating piece (14).

2. A moisture-proof explosion-proof zinc oxide arrester as claimed in claim 1, characterized in that: the lightning arrester explosion-proof device is arranged between the insulating outer sleeve (5) and the zinc oxide resistor (9), and comprises an electric insulating gel layer (8), a soft cavity (7) and a fiber layer (6) which are sequentially arranged from inside to outside, wherein the soft cavity (7) is filled with non-Newtonian fluid.

3. A moisture-proof explosion-proof zinc oxide arrester as claimed in claim 1, characterized in that: the other end of the first lead (12) is exposed on the lead core (123) of the lead sleeve (121) and the other end of the second lead (13) is exposed on the lead core (123) of the lead sleeve (121), and is respectively sleeved with an insulating protective sleeve (16), and the insulating protective sleeve (16) is provided with a connecting hole for the water-absorbing insulating piece (14) to pass through.

4. A moisture-proof explosion-proof zinc oxide arrester as claimed in claim 1, characterized in that: the working circuit comprises an indicator light (11) and a power supply unit (15) for supplying power to the indicator light (11).

5. The moisture-proof explosion-proof zinc oxide arrester as claimed in claim 4, wherein: still including dampproofing indicator panel (10) that is hollow structure, set up the screw rod hole that can supply ground screw rod (3) to pass on dampproofing indicator panel (10), screw rod hole and through-hole (31) through connection, the one end of first wire (12) and the one end of second wire (13) are located dampproofing indicator panel (10), pilot lamp (11) and power supply unit (15) set up on dampproofing indicator panel (10).

6. A moisture-proof explosion-proof zinc oxide arrester as claimed in claim 1, characterized in that: the first lead (12) and the second lead (13) further comprise a metal wire (122) arranged in the lead sleeve (121), and the yield strength of the metal wire (122) is 60-180 MPa.

7. A moisture-proof explosion-proof zinc oxide arrester as claimed in claim 1, characterized in that: the through hole (31) is an inclined hole, the outlet and the inlet of the inclined hole are both positioned on the side wall of the grounding screw rod (3), and a sealing ring (32) is arranged in the through hole (31).

8. A moisture-proof explosion-proof zinc oxide arrester as claimed in claim 1, characterized in that: the water-absorbing insulating piece (14) comprises a water-absorbing insulating wire (141) and a water-absorbing core (142) wrapped on the water-absorbing insulating wire.

9. A moisture-proof explosion-proof zinc oxide arrester as claimed in claim 8, wherein: the water-absorbing insulating wire (141) is pure cotton degreased yarn loaded with salt particles.

10. A moisture-proof explosion-proof zinc oxide arrester as claimed in claim 8, wherein: the water absorption core (142) is oval.