CN212750522U

CN212750522U - Zinc oxide lightning arrester

Info

Publication number: CN212750522U
Application number: CN202022139797.7U
Authority: CN
Inventors: 黄道博
Original assignee: Huangluhong Electric Co ltd
Current assignee: Jialun Electric Co.,Ltd.
Priority date: 2020-09-26
Filing date: 2020-09-26
Publication date: 2021-03-19
Anticipated expiration: 2030-09-26

Abstract

The utility model discloses a zinc oxide arrester, its technical scheme main points are: the upper end of the shell is provided with a first external thread, the lower end of the protective sleeve is provided with a first internal thread, the shell is in threaded connection with the protective sleeve, the upper end of the protective sleeve is provided with an opening, the opening is provided with a sealing cover, the upper end outer surface of the protective sleeve is provided with a second external thread, the lower end inner surface of the sealing cover is provided with a second external thread, the protective sleeve is in threaded connection with the sealing cover, the side surface of the bolt is provided with a first groove, the side surface of the bolt is fixedly provided with a first convex ring, the lower end of the shell is fixedly provided with a first sleeve, the first sleeve is positioned on the outer side of the bolt, the inner wall of the first sleeve is fixedly provided with a second convex ring corresponding to the first groove, the inner wall of the first sleeve is provided with a second groove corresponding to the; meanwhile, the joint of the bolt and the shell has better sealing performance.

Description

Zinc oxide lightning arrester

Technical Field

The utility model relates to a lightning arrester technical field, in particular to zinc oxide lightning arrester.

Background

A lightning arrester: an electrical appliance for protecting electrical equipment from high transient overvoltage during lightning strike, limiting follow current time, and also limiting follow current amplitude. The difference between the arrester and the traditional arrester is that the arrester has no discharge gap and plays the role of current leakage and disconnection by utilizing the nonlinear characteristic of the zinc oxide.

The existing zinc oxide lightning arrester is usually provided with a protective sleeve, but the protective sleeve is usually directly sleeved on the zinc oxide lightning arrester and is easy to shake; meanwhile, the bottom bolt of the existing zinc oxide arrester has no protection mechanism, so that the sealing performance of the bolt is poor, and a new technical scheme is needed to solve the problem.

SUMMERY OF THE UTILITY MODEL

To the problem of mentioning in the background art, the utility model aims at providing a zinc oxide arrester to solve the protective sheath of mentioning in the background art and rock easily and bottom bolt department does not have the protection mechanism and leads to the not good problem of sealing performance.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a zinc oxide arrester comprises a shell and a protective sleeve, wherein a plurality of resistance cards are arranged inside the shell, an upper electrode is arranged at the top end inside the shell, a lower electrode is arranged at the bottom end inside the shell, a conductive post is arranged at the upper end of the upper electrode, a wiring board is detachably arranged on the conductive post, a bolt is arranged at the lower end of the lower electrode, a nut is in threaded connection with the bolt, a first external thread is arranged at the upper end of the shell, a first internal thread is arranged at the lower end of the protective sleeve, the shell is in threaded connection with the protective sleeve, an opening is arranged at the upper end of the protective sleeve, a sealing cover is arranged at the opening, a second external thread is arranged at the outer surface of the upper end of the protective sleeve, a second external thread is arranged at the inner surface of the lower end of the sealing, the side of bolt is fixed and is provided with first bulge loop, the fixed first sleeve that is provided with of lower extreme of shell, first sleeve is located the outside of bolt, first telescopic inner wall correspond to first groove department is fixed and is provided with the second bulge loop, first telescopic inner wall correspond to first bulge loop department has seted up the second recess, the fixed second sleeve that is provided with in upper end of nut.

Furthermore, a sealing ring is fixedly arranged at the upper end of the protective sleeve.

Through above-mentioned technical scheme, can promote the leakproofness between protective sheath and the sealed lid, prevent that liquid from getting into inside the protective sheath by the junction of protective sheath and sealed lid.

Furthermore, a wire guide opening is formed in the side wall of the protective sleeve, and a sealing ring is arranged in the wire guide opening.

Through above-mentioned technical scheme, when working a telephone switchboard, make the wire pass the wire mouth get into the inside of protective sheath can, the leakproofness of wire mouth department can be promoted to the sealing washer.

Further, the bolt, the nut and the second sleeve are made of stainless steel.

Through the technical scheme, the stainless steel material has good performance of resisting weak corrosive media such as air, steam, water and the like, and simultaneously has high mechanical strength.

Furthermore, a baffle is fixedly arranged at the upper end of the shell.

Through above-mentioned technical scheme, when the installation, the existence of baffle can block protective sheath and sealed lid, prevents to lead electrical pillar and sealed lid direct contact.

Furthermore, a compression ring is fixedly arranged on the inner wall of the second sleeve.

Through above-mentioned technical scheme, when using, usable clamping ring pushes down first sleeve, is that first bulge loop hugs closely first recess, makes the second bulge loop hug closely the second recess.

To sum up, the utility model discloses mainly have following beneficial effect:

in the utility model, the first external thread and the first internal thread are matched for use by arranging the first external thread and the first internal thread, so that the protective sleeve can not be easily moved when in use, and the upper end of the protective sleeve is also provided with the sealing cover and the sealing ring, so that the sealing property of the protective sleeve is also better; and simultaneously, the utility model discloses in still through setting up first sleeve and second sleeve, when using, liquid can not have the junction entering shell's of bolt and shell inside, and the leakproofness is better.

Drawings

FIG. 1 is a front view of the present embodiment;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is an enlarged schematic view at B in fig. 2.

Reference numerals: 1. a housing; 2. a protective sleeve; 201. an opening; 202. a wire guide port; 3. resistance cards; 4. an upper electrode; 5. a lower electrode; 6. a conductive post; 7. a wiring board; 8. a bolt; 801. a first groove; 802. a first convex ring; 9. a nut; 10. a sealing cover; 11. a first sleeve; 1101. a second convex ring; 1102. a second groove; 12. a second sleeve; 1201. pressing a ring; 13. and a baffle plate.

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 in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1-3, a zinc oxide arrester comprises a housing 1 and a protective sleeve 2, wherein a plurality of resistance discs 3 are arranged inside the housing 1, an upper electrode 4 is arranged at the top end inside the housing 1, a lower electrode 5 is arranged at the bottom end inside the housing 1, a conductive post 6 is arranged at the upper end of the upper electrode 4, a wiring board 7 is detachably arranged on the conductive post 6, a bolt 8 is arranged at the lower end of the lower electrode 5, a nut 9 is connected to the bolt 8 through a thread, a first external thread is arranged at the upper end of the housing 1, a first internal thread is arranged at the lower end of the protective sleeve 2, the housing 1 is in threaded connection with the protective sleeve 2, an opening 201 is arranged at the upper end of the protective sleeve 2, a sealing cover 10 is arranged at the opening 201, a second external thread is arranged at the outer surface of the upper, the side of the bolt 8 is provided with a first groove 801, the side of the bolt 8 is fixedly provided with a first convex ring 802, the lower end of the shell 1 is fixedly provided with a first sleeve 11, the first sleeve 11 is positioned at the outer side of the bolt 8, the inner wall of the first sleeve 11 is fixedly provided with a second convex ring 1101 corresponding to the first groove 801, the inner wall of the first sleeve 11 is provided with a second groove 1102 corresponding to the first convex ring 802, and the upper end of the nut 9 is fixedly provided with a second sleeve 12, in the embodiment, the shell 1, the protective sleeve 2 and the sealing cover 10 are all made of silicon rubber and are manufactured by using a compression molding process, the first sleeve 11 and the shell 1 are integrally molded, the resistor sheet 3 is a zinc oxide varistor, the varistor has a large varistor value which is equivalent to an insulation state under a normal working voltage (smaller than the varistor), but under an impact voltage (larger than the varistor), the varistor is broken down, corresponding to a short circuit condition. However, the varistor can recover the insulation state after being struck; when the voltage higher than the voltage-sensitive voltage is removed, it recovers the high-impedance state. Therefore, after the zinc oxide lightning arrester is installed on a power line, when lightning strikes, the high voltage of lightning waves breaks down the piezoresistor, lightning current flows into the ground through the piezoresistor, and the voltage on the power line can be controlled within a safe range, so that the safety of electrical equipment is protected.

Referring to fig. 2, a sealing ring is fixedly arranged at the upper end of the protective sleeve 2, and the sealing ring is made of nitrile rubber.

Referring to fig. 2, wire guide 202 has been seted up on the lateral wall of protective sheath 2, is provided with the sealing washer in the wire guide 202, and the sealing washer uses nitrile rubber to make, and after the wiring is accomplished, need to fill sealed glue to wire guide 202, in order to promote the utility model discloses a leakproofness.

Referring to fig. 2, the bolt 8, the nut 9 and the second sleeve 12 are made of stainless steel, the second sleeve 12 is welded and fixed with the nut 9, the upper end of the second sleeve 12 contacts with the housing 1, and a sealant is required to be arranged at the joint.

Referring to fig. 1 and 2, a baffle 13 is fixedly arranged at the upper end of the housing 1, the baffle 13 is made of silicon rubber, and the baffle 13 and the housing 1 are integrally formed.

Referring to fig. 3, a press ring 1201 is fixedly disposed on an inner wall of the second sleeve 12, and the press ring 1201 is integrally formed with the second sleeve 12.

To sum up, the utility model discloses before using, will seal the lid 10 and take off on having protective sheath 2, install protective sheath 2 in the upper end of shell 1, then the wiring board is installed on leading electrical pillar 6 again, make the wire pass wire mouth 202, then wiring, the back is accomplished in the wiring, install sealed lid 10 on protective sheath 2, set up sealed glue to protective sheath 2 and sealed 10 junction at last, set up sealed glue in wire mouth 202, need set up sealed glue in the junction of second sleeve 12 and shell 1 after can, when using, protective sheath 2 can not remove easily, and protective sheath 2's sealing performance is better, liquid does not have the inside that bolt 8 and shell 1's junction got into shell 1.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a zinc oxide arrester, includes shell (1) and protective sheath (2), the inside of shell (1) is provided with a plurality of resistance cards (3), the inside top of shell (1) is provided with upper electrode (4), the inside bottom of shell (1) is provided with bottom electrode (5), the upper end of upper electrode (4) is provided with and leads electrical pillar (6), it is provided with wiring board (7) to lead electrical pillar (6) to go up to dismantle, the lower extreme of bottom electrode (5) sets up bolt (8), threaded connection has nut (9), its characterized in that on bolt (8): first external screw thread has been seted up to the upper end of shell (1), first internal thread has been seted up to the lower extreme of protective sheath (2), shell (1) with protective sheath (2) threaded connection, opening (201) have been seted up to the upper end of protective sheath (2), opening (201) department is provided with sealed lid (10), second external screw thread has been seted up to the upper end surface of protective sheath (2), second external screw thread has been seted up to the lower extreme internal surface of sealed lid (10), protective sheath (2) with sealed lid (10) threaded connection, first recess (801) have been seted up to the side of bolt (8), the fixed first bulge loop (802) that is provided with in side of bolt (8), the fixed first sleeve (11) that is provided with of lower extreme of shell (1), first sleeve (11) are located the outside of bolt (8), the inner wall of first sleeve (11) correspond to fixed second bulge loop (802) department is provided with in first recess (801) department (1101) A second groove (1102) is formed in the inner wall of the first sleeve (11) corresponding to the first convex ring (802), and a second sleeve (12) is fixedly arranged at the upper end of the nut (9).

2. A zinc oxide arrester according to claim 1, characterized in that: the upper end of the protective sleeve (2) is fixedly provided with a sealing ring.

3. A zinc oxide arrester according to claim 1, characterized in that: a wire guide opening (202) is formed in the side wall of the protective sleeve (2), and a sealing ring is arranged in the wire guide opening (202).

4. A zinc oxide arrester according to claim 1, characterized in that: the bolt (8), the nut (9) and the second sleeve (12) are made of stainless steel.

5. A zinc oxide arrester according to claim 1, characterized in that: the upper end of the shell (1) is fixedly provided with a baffle (13).

6. A zinc oxide arrester according to claim 1, characterized in that: and a pressing ring (1201) is fixedly arranged on the inner wall of the second sleeve (12).