CN210156890U

CN210156890U - Lightning arrester base

Info

Publication number: CN210156890U
Application number: CN201920867895.7U
Authority: CN
Inventors: 陈迪
Original assignee: Dalian Fafu'an Electric Appliances Co Ltd
Current assignee: Dalian Fafu'an Electric Appliances Co Ltd
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2020-03-17
Anticipated expiration: 2029-06-11

Abstract

The utility model relates to an arrester technical field, concretely relates to arrester base, including mounting panel, arrester bottom plate, insulator, insulating cushion, stainless steel bolt and stainless steel nut, the insulator is the sleeve pipe column structure, and the insulator upper end is the isolation portion, and the insulator lower extreme is the supporting part, the isolation portion upper end outside is equipped with the circumference recess, the supporting part of insulator is located between mounting panel and the arrester bottom plate, and the circumference recess that establishes in the through-hole and isolation portion upper end is higher than the upper surface of arrester bottom plate is inserted to the isolation portion of insulator, insulating cushion is located arrester bottom plate top and insulating cushion cover and establishes in the isolation portion outside, stainless steel nut is located insulating cushion top, stainless steel bolt's screw rod part by lower supreme behind passing mounting hole and insulator in proper order with stainless steel nut threaded connection. The base has simple structure and convenient installation; the insulation resistance of the base can not be influenced by rainwater and reduced, and the safe operation of the equipment is ensured.

Description

Lightning arrester base

Technical Field

The utility model relates to an arrester technical field, concretely relates to arrester base.

Background

The lightning arrester plays an indispensable role in the power grid as an important role of overvoltage protection. However, in recent years, the phenomena of unqualified insulation of the split type base of the lightning arrester, breakage of the small porcelain bushing of the base, ground discharge of the base of the lightning arrester in the wire-disconnecting-free pre-test process of the lightning arrester and the like occur occasionally, the phenomena directly cause increase of the overhaul frequency of the lightning arrester and prolong the power failure time, certain harm is caused to the stable operation of a power grid, and at present, the phenomena still show a rising trend.

Through the inspection of the lightning arrester base, the base insulation is mainly realized by a structure formed by an upper small porcelain bushing, a lower small porcelain bushing and a fastening bolt of the lightning arrester base, and a certain gap is formed between the fastening bolt and the small porcelain bushing, so that when raining or wet weather occurs, the gap is wetted and water enters, the insulation resistance is unqualified, the fastening bolt is corroded, and the porcelain bushing is likely to burst when the space is filled with iron chips.

In order to solve the above problems, patent CN208444683U discloses a new zinc oxide lightning arrester base, the lightning arrester base realizes the sealing of the fastening bolt through a waterproof flange arranged at the edge part of the fastening nut, a first sealing ring clamped between the large end part of the fastening bolt and the grounding mounting plate, a second sealing ring clamped between a lower end porcelain bushing and the upper surface of the grounding mounting plate, and a third sealing ring clamped between the lower end porcelain bushing and the lightning arrester base plate, thereby avoiding the base insulation property reduction and the corrosion of the fastening bolt expansion porcelain bushing caused by rainwater entering a gap between the fastening bolt and the porcelain bushing, however, the base is complex in structure and time-consuming and labor-consuming to install, and if one of the first sealing ring, the second sealing ring and the third sealing ring is broken or not installed tightly, rainwater can enter a gap between the fastening bolt and the porcelain bushing, so that the insulativity of the base and the corrosion of the bolt are reduced, and the porcelain bushing is broken.

SUMMERY OF THE UTILITY MODEL

In order to solve the existing problems, the utility model designs a lightning arrester base which has simple structure, few parts and convenient installation, can greatly shorten the installation time and reduce the labor intensity of installation workers; the insulation resistance of the base can not be influenced by rainwater and reduced, and the safe operation of the equipment is ensured.

In order to realize the technical purpose, reach above-mentioned technological effect, the utility model discloses a realize through following technical scheme:

an arrester base comprises a mounting plate, an arrester base plate, a porcelain bushing, an insulating rubber pad, a stainless steel bolt and a stainless steel nut, wherein the arrester base plate is positioned above the mounting plate, the arrester base plate and the mounting plate are parallel to each other, a mounting hole is uniformly formed in the edge of the mounting plate, a through hole is formed in the edge of the arrester base plate and corresponds to the mounting hole, the porcelain bushing is of a sleeve-shaped structure, an isolation part is arranged at the upper end of the porcelain bushing, a supporting part is arranged at the lower end of the porcelain bushing, the outer diameter of the isolation part is smaller than that of the supporting part, a circumferential groove is formed in the outer side of the upper end of the isolation part, the porcelain bushing is positioned on a connecting line of the mounting hole and the through hole, the supporting part of the porcelain bushing is positioned between the mounting plate and the arrester base plate, the isolation part of the porcelain bushing is inserted into the through hole, the circumferential groove at the upper end of the isolation part is higher than the upper surface of, the inner side of the insulating rubber pad is inwards protruded at a position corresponding to a circumferential groove at the upper end of the isolation part, and a circumferential protrusion matched with the circumferential groove is formed, the circumferential protrusion is embedded in the circumferential groove, the total thickness of the lightning arrester base plate and the insulating rubber pad is larger than the height of the isolation part of the porcelain sleeve, the stainless steel nut is positioned at the top of the insulating rubber pad, and a screw rod part of the stainless steel bolt sequentially penetrates through the mounting hole and the porcelain sleeve from bottom to top and then is in threaded connection with the stainless steel nut.

Furthermore, a spring washer is arranged between the head of the stainless steel bolt and the mounting plate.

Furthermore, the aperture of the through hole on the arrester base plate is larger than the outer diameter of the isolation part and smaller than the outer diameter of the support part.

The utility model has the advantages that: the base has the advantages of simple structure, few parts and convenient installation, can greatly shorten the installation time, and lightens the labor intensity of installation workers; the lightning arrester base adopts the stainless steel bolt and the stainless steel nut as the connecting piece, so that the lightning arrester base is not affected by rainwater and cannot be rusted and cracked by the bolt; the porcelain bushing comprises a supporting portion and an isolating portion, wherein the supporting portion plays a role in supporting and isolating the mounting plate and the arrester base plate, the isolating portion penetrates through a through hole of the arrester base plate and protrudes out of the isolating portion of the upper surface of the arrester base plate, an insulating rubber pad is sleeved on the isolating portion, the insulating rubber pad and the isolating portion are clamped through a circumferential protrusion and a circumferential groove, the insulating resistance of the base can be reduced when the gap between the arrester base plate of the traditional base and the bolt is filled with water, the isolating portion between the arrester base plate of the arrester base and the stainless steel bolt is isolated through the porcelain bushing, the stainless steel nut and the arrester base plate are isolated through the insulating rubber pad, the insulating resistance of the base can not be influenced by rainwater and reduced, the insulating property is excellent, and safe operation of equipment is guaranteed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the base of the present invention;

FIG. 2 is a sectional view of the structure at A in FIG. 1;

fig. 3 is a schematic structural view of the porcelain bushing.

In the drawings, the components represented by the respective reference numerals are listed below:

1-mounting plate, 11-mounting hole, 2-lightning arrester mounting plate, 21-through hole, 3-stainless steel bolt, 4-porcelain bushing, 41-supporting part, 42-isolating part, 43-circumferential groove, 5-insulating rubber pad, 51-circumferential bulge, 6-stainless steel bolt, 7-spring washer and 8-lightning arrester main body.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, a lightning arrester base comprises a mounting plate 1, a lightning arrester base plate 2, a porcelain bushing 4, an insulating rubber mat 5, a stainless steel bolt 3 and a stainless steel nut 6, wherein the lightning arrester base plate 2 is located above the mounting plate 1, the lightning arrester base plate 2 is parallel to the mounting plate 1, a mounting hole 11 is uniformly formed in the edge of the mounting plate 1, a through hole 21 is formed in the edge of the lightning arrester base plate 2 corresponding to the mounting hole 11, the porcelain bushing 4 is of a sleeve-shaped structure, an isolation portion 42 is arranged at the upper end of the porcelain bushing 4, a supporting portion 41 is arranged at the lower end of the porcelain bushing 4, the outer diameter of the isolation portion 42 is smaller than that of the supporting portion 41, a circumferential groove 43 is formed in the outer side of the upper end of the isolation portion 42, the porcelain bushing 4 is located on the connecting line of the mounting hole 11 and the through hole 21, the supporting portion 41 of the porcelain bushing 4 is located between the mounting plate 1 and the lightning arrester base plate 2, the isolation portion 42 The upper surface of bottom plate 2, insulating rubber mat 5 is located 2 tops of arrester bottom plate and 5 covers of insulating rubber mat and establishes in the isolation portion 42 outside, and the circumference recess 43 of the inboard and isolation portion 42 upper end of insulating rubber mat 5 corresponds the position inwards to bulge and form with the circumference protruding 51 of circumference recess 43 adaptation, circumference protruding 51 inlays and establishes in circumference recess 43, the gross thickness of arrester bottom plate 2 and insulating rubber mat 5 is greater than the isolation portion 42 height of insulator 4, stainless steel nut 6 is located 5 tops of insulating rubber mat, stainless steel bolt 3's screw rod part from lower supreme pass in proper order behind mounting hole 11 and the insulator 4 with stainless steel nut 6 threaded connection.

Wherein, a spring washer 7 is arranged between the head of the stainless steel bolt 3 and the mounting plate 1.

The aperture of the through hole 21 on the arrester base plate 2 is larger than the outer diameter of the isolation portion 42 and smaller than the outer diameter of the support portion 41, so that the support portion 41 of the porcelain bushing 4 can support and isolate between the mounting plate 1 and the arrester base plate 2.

One specific application of this embodiment is: when the lightning arrester base is used, a screw rod part of a stainless steel bolt 3 penetrates through a mounting hole 11 on a mounting plate 1 from bottom to top, a supporting part 41 of a porcelain bushing 4 is downwards sleeved on the screw rod of the stainless steel bolt 3, then a through hole 21 of a lightning arrester mounting plate 2 is sleeved on an isolation part 42 of the porcelain bushing 4, an insulating rubber mat 5 is sleeved on the isolation part 42 protruding out of the upper surface of a lightning arrester base plate 2, and the insulating rubber mat 5 has elasticity, so that a circumferential protrusion 51 on the inner side of the insulating rubber mat 5 can be embedded into a circumferential groove 43 on the outer side of the isolation part 42, a stainless steel nut 6 is screwed into the screw rod above the insulating rubber mat 5 until the stainless steel nut 6 tightly presses the lightning arrester base plate 2 on the supporting part 41 of the porcelain bushing 4 through the insulating rubber mat 5, and then a lightning arrester main body 8 is installed on the lightning arrester base plate. The lightning arrester base has the advantages of simple structure, few parts and convenient installation, can greatly shorten the installation time, and lightens the labor intensity of installation workers; the lightning arrester base adopts the stainless steel bolt 3 and the stainless steel nut 6 as connecting pieces, and compared with the traditional iron bolt and nut, the lightning arrester base is not affected by rainwater to cause the occurrence of bolt corrosion and cracking porcelain bushing 4; the porcelain bushing 4 comprises a supporting part 41 and an isolating part 42, wherein the supporting part 41 plays a role of supporting and isolating the mounting plate 1 and the arrester base plate 2, the isolating part 42 penetrates through the through hole 21 of the arrester base plate 2 and is sleeved with the insulating rubber pad 5 on the isolating part 42 protruding out of the upper surface of the arrester base plate 2, the insulating rubber pad 5 and the isolating part 42 are clamped through the circumferential protrusion 51 and the circumferential groove 43, compared with the situation that the insulation resistance of the base is reduced when water enters the gap between the arrester base plate and the bolt in the traditional base, the arrester base plate 2 and the stainless steel bolt 3 of the arrester base are isolated through the isolating part 42 of the porcelain bushing 4, the stainless steel nut 6 and the arrester base plate 2 are isolated through the insulating rubber pad 5, even if rainwater enters the gap between the stainless steel bolt 3 and the porcelain bushing 4, the arrester base plate 2 and the mounting plate 1 cannot be conducted by rainwater, so that the insulation resistance of the base cannot be influenced by the rainwater to be reduced, the insulating property is excellent, and the safe operation of the equipment is ensured.

Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should be able to make changes, alterations, additions or substitutions within the scope of the present invention.

Claims

1. A lightning arrester base, its characterized in that: the lightning arrester comprises a mounting plate, a lightning arrester bottom plate, a porcelain bushing, an insulating rubber pad, a stainless steel bolt and a stainless steel nut, wherein the lightning arrester bottom plate is positioned above the mounting plate, the lightning arrester bottom plate and the mounting plate are parallel to each other, mounting holes are uniformly formed in the edge of the mounting plate, through holes are formed in the edge of the lightning arrester bottom plate and correspond to the mounting holes, the porcelain bushing is of a sleeve-shaped structure, the upper end of the porcelain bushing is an isolation part, the lower end of the porcelain bushing is a supporting part, the outer diameter of the isolation part is smaller than that of the supporting part, a circumferential groove is formed in the outer side of the upper end of the isolation part, the porcelain bushing is positioned on a connecting line of the mounting holes and the through holes, the supporting part of the porcelain bushing is positioned between the mounting plate and the lightning arrester bottom plate, the isolation part of the porcelain bushing is inserted into the through holes, the circumferential groove of the isolation part is higher than the upper surface, the inner side of the insulating rubber pad is inwards protruded at a position corresponding to a circumferential groove at the upper end of the isolation part, and a circumferential protrusion matched with the circumferential groove is formed, the circumferential protrusion is embedded in the circumferential groove, the total thickness of the lightning arrester base plate and the insulating rubber pad is larger than the height of the isolation part of the porcelain sleeve, the stainless steel nut is positioned at the top of the insulating rubber pad, and a screw rod part of the stainless steel bolt sequentially penetrates through the mounting hole and the porcelain sleeve from bottom to top and then is in threaded connection with the stainless steel nut.

2. A lightning arrester base as claimed in claim 1, characterized in that: and a spring washer is arranged between the head of the stainless steel bolt and the mounting plate.

3. A lightning arrester base as claimed in claim 1, characterized in that: the aperture of the through hole on the lightning arrester bottom plate is larger than the outer diameter of the isolation part and smaller than the outer diameter of the supporting part.