CN220474408U - Rear access type lightning arrester - Google Patents

Abstract

The utility model discloses a rear access type lightning arrester, which comprises a conductive outer layer, a conductive inner layer, an insulating layer and a lightning arrester core body, wherein the conductive outer layer, the conductive inner layer and the insulating layer form a lightning arrester main body with a T-shaped installation space; this embodiment sets up through further design to current arrester, through setting up the elastic mechanism that is located the tip, when producing high hot pressing in inside, opens further one section buffering pressure release based on pressure and inflation bullet, and the bullet is offered the counter and can be played the suggestion effect to normally installing the arrester relatively, and the staff of being convenient for confirms.

Description

Rear access type lightning arrester

Technical Field

The utility model relates to the technical field of lightning arresters, in particular to a rear access type lightning arrester.

Background

In outdoor power supply systems, there is often a problem in that electrical equipment is damaged by overvoltage, particularly in the case of lightning impulse, so that a rear arrester is generally mounted on a cable accessory. The rear-connection type gapless zinc oxide arrester is arranged behind front and rear connectors of cables on electrical equipment such as a box transformer, a ring main unit, a cable branch box and the like, overvoltage protection is provided for the equipment or the cables, and the die casting outer shielding layer ensures personal safety of installation and maintenance personnel and safe operation of the equipment, has excellent performances of ultraviolet resistance, ageing resistance, water resistance and moisture resistance, and ensures reliable operation of products in severe environments.

After the current back-connection arrester inserts electrical equipment's equipment, the arrester core that its middle part set up can have performance decline scheduling problem in long-term use, including the aggravated ageing of the arrester core valve block that leads to by the not tight scheduling problem of sealing and wet inflation, and the arrester based on above-mentioned problem just exists in normal use and receives performance decline influence to produce bigger temperature and hot pressing, and based on the thermal expansion of its own material, the pressure release has not led to the damage of arrester body at work, and is difficult to perceive after the arrester damages.

Disclosure of Invention

In view of the prior art, the utility model aims to provide a rear access type lightning arrester, the embodiment is further designed by arranging an elastic mechanism at the end part, when high-pressure is generated inside, the rear access type lightning arrester is sprung out based on pressure and expansion to further buffer and release pressure, and the sprung-out meter can play a prompting role relative to normal installation of the lightning arrester, so that the lightning arrester is convenient for staff to confirm.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a back access formula arrester, includes electrically conductive skin, electrically conductive inlayer, arrester core and insulating layer, electrically conductive skin, electrically conductive inlayer and insulating layer constitute the arrester main part that has T type installation space, the arrester core sets up in its inside both ends and is provided with the electrode respectively, arrester terminal is connected to the one end of arrester core, and the other end butt bottom, the bottom is used for sealing the bottom opening in T type installation space, connecting bolt external member on the bottom, the linear connecting bolt external member of electrode, be provided with elastic mechanism between bottom and the arrester main part, elastic mechanism is used for the relative arrester main part axial activity of bottom.

As a further arrangement of the scheme, a plurality of inclined chamfer blocks are arranged on the circumference of the bottom cover, a plurality of sliding teeth are arranged at the position of the lightning arrester main body opposite to the bottom cover, and the sliding teeth are annularly arranged on the circumference.

As a further arrangement of the scheme, two sides of the outer wall of the bottom cover, which are oppositely provided with the bevel chamfer blocks, are respectively provided with a split groove, and the split grooves are used for elastic swinging of the bevel chamfer blocks.

As a further arrangement of the scheme, a plurality of stabilizing springs are further arranged between the bottom cover and the lightning arrester main body, and the elastic force of the stabilizing springs is smaller than the friction force of the inclined chamfer block and the sliding teeth.

As a further arrangement of the scheme, the electrode is connected with the bolt sleeve through the cable, and the length of the cable is larger than the maximum length of the bottom cover, which is separated from the lightning arrester main body.

As a further arrangement of the scheme, screw holes are formed in the lightning arrester terminals and are used for installing stud bolts to connect the conductive columns and the insulating protection plugs.

The beneficial effects are that: compared with the prior art, the rear access type lightning arrester is further designed and provided with the elastic mechanism at the bottom cover, when high-pressure is generated inside, the bottom cover is sprung off based on pressure and expansion, one section of buffer pressure relief is realized, explosion caused by concentrated pressure is avoided, the spring-off design causes the lightning arrester to lose an internal sealing result, but compared with the normal installation of the lightning arrester, the lightning arrester is different in appearance (height and installation state) from the normal installation after being unfolded, the lightning arrester has a prompting function, the confirmation of workers is facilitated, and in addition, the end electrode can be protected to a certain extent until a maintainer changes through a cable connection ground wire bolt.

Drawings

Fig. 1 is a schematic view of the structure of the lightning arrester of the present utility model.

Fig. 2 is a partial enlarged view of the lightning arrester of the present utility model.

Reference numerals: 1. an electrically conductive outer layer; 2. a lightning arrester core; 22. an electrode; 3. a conductive inner layer; 4. an insulating layer; 5. a lightning arrester terminal; 6. a bottom cover; 61. a bevel chamfer block; 62. sliding teeth; 66. a stabilizing spring; 67. a moisture absorption pad; 8. a bolt set; 88. a cable; 9. t-shaped installation space.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. In addition, the embodiments of the present application and the features in the embodiments may be combined with each other without conflicting with each other.

A rear access arrester as shown in figures 1-2, characterized by: including electrically conductive outer layer 1, electrically conductive inlayer 3, arrester core 2 and insulating layer 4, electrically conductive outer layer 1, electrically conductive inlayer 3 and insulating layer 4 constitute the arrester main part that has T type installation space 9, arrester core 2 sets up in its inside both ends and is provided with electrode 22 respectively, arrester terminal 5 is connected to the one end of arrester core 2, and other end butt bottom 6, bottom 6 is used for sealing the bottom opening of T type installation space 9, connecting bolt external member 8 on the bottom 6, electrode 22 linear connection bolt external member 8, be provided with elastic mechanism 7 between bottom 6 and the arrester main part, elastic mechanism 7 is used for the relative arrester main part axial activity of bottom 6.

Through the above-mentioned structure setting, the arrester of this embodiment, screw 51 in the arrester terminal 5 reservation that sets up in the upper end of its T type installation cavity 9 after the installation is connected in, can install conductive post and insulating protection stopper, through conductive post and external connection, insulating protection stopper can seal the inner chamber, and as one of pressure relief mouth, in addition, the bottom of arrester core 2 sets up elastic mechanism 7 when producing hot high pressure in inside, can pop out, avoid arrester core 2 high temperature inflation high pressure to obtain not releasing, thereby produce the explosion, and the arrester body of explosion forms the fragment and influences surrounding equipment cable, bottom 6 of this embodiment can produce the axial mobility of relative arrester body at inside high pressure, relative arrester body activity, but the electrode 22 of arrester body is still connected on bolt set 8 through cable 88, can continue to form ground connection, avoid the electric current to lose the ground connection and cause equipment influence.

As the further setting of above-mentioned scheme, be provided with a plurality of inclined plane chamfer pieces 61 on the bottom 6 circumference, the relative bottom 6 department of arrester main part is provided with a plurality of sliding teeth 62, be the cyclic annular setting on the sliding teeth 62 circumference the bottom 6 is provided with the outer wall both sides of inclined plane chamfer pieces 61 relatively and all is provided with the breach groove, the breach groove is used for the elastic oscillation of inclined plane chamfer pieces 61 still be provided with a plurality of stable springs 66 between bottom 6 and the arrester main part, stable spring 66's elasticity is less than the frictional force of inclined plane chamfer pieces 61 and sliding teeth 62.

Through the above structure setting, in the state of normal use, at this moment, sliding tooth 62 and bevel chamfer piece 61 slope cooperation, but, based on both dislocation structures, and the elasticity of stable spring 66 is less than the dislocation frictional force of both, consequently, equipment is stable in the state of fig. 2, and when inside produces pressure, or the electrode receives inside thermal expansion and stretches out relative to the arrester body, both can promote arrester body and bottom 6 relative activity, thereby make sliding tooth 62 and bevel chamfer piece 61 slope cooperation slip, and all be provided with the split groove based on the outer wall both sides of bevel chamfer piece 61, consequently, bevel chamfer piece 61 outwards swings, form elastic dislocation, thereby make arrester body and bottom 6 form axial activity, bevel chamfer piece 61 switches between a plurality of sliding tooth 62, until the pressure release is accomplished after static, at this moment, 88 cable conductor wire makes the arrester ground, but arrester body has produced the removal with bottom 6, regular inspection or maintenance personnel can the quick discovery of this problem, overhaul and maintenance.

As a further arrangement of the above, the electrode 22 is connected to the bolt assembly 8 by providing a cable 88, the cable 88 having a length greater than the maximum length of the bottom cover 6 that is disengaged from the lightning arrester body.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (6)

1. A rear access arrester, characterized in that: including electrically conductive skin (1), electrically conductive inlayer (3), arrester core (2) and insulating layer (4), electrically conductive skin (1), electrically conductive inlayer (3) and insulating layer (4) constitute the arrester main part that has T type installation space (9), arrester core (2) set up in T type installation space (9), and the both ends of arrester core (2) are provided with electrode (22) respectively, arrester terminal (5) are connected to the one end of arrester core (2), other end butt bottom (6), bottom (6) are used for sealing the bottom opening of T type installation space (9), connecting bolt external member (8) on bottom (6), electrode (22) linear connecting bolt external member (8), be provided with elastic mechanism (7) between bottom (6) and the arrester main part, elastic mechanism (7) are used for bottom (6) to the relative arrester main part axial activity.

2. A rear access arrester as claimed in claim 1, wherein: the lightning arrester is characterized in that a plurality of inclined chamfer blocks (61) are arranged on the circumference of the bottom cover (6), a plurality of sliding teeth (62) are arranged at the position, opposite to the bottom cover (6), of the lightning arrester body, and the sliding teeth (62) are annularly arranged on the circumference.

3. A rear access arrester as claimed in claim 2, wherein: the bottom cover (6) is relatively provided with an inclined chamfer block (61), and both sides of the outer wall are provided with split grooves which are used for elastic swinging of the inclined chamfer block (61).

4. A rear access arrester according to claim 3, characterized in that: a plurality of stabilizing springs (66) are further arranged between the bottom cover (6) and the lightning arrester main body, and the elastic force of the stabilizing springs (66) is smaller than the friction force between the inclined chamfer block (61) and the sliding teeth (62).

5. A rear access arrester as claimed in claim 1, wherein: the electrode (22) is connected with the bolt sleeve (8) through the cable (88), and the length of the cable (88) is larger than the maximum length of the bottom cover (6) which is separated from the lightning arrester main body.

6. A rear access arrester as claimed in claim 1, wherein: screw holes (51) are formed in the lightning arrester terminals (5) and used for installing stud bolts to connect the conductive columns and the insulating protection plugs.