CN201498289U

CN201498289U - 10 KV post lightning arrester

Info

Publication number: CN201498289U
Application number: CN200920227699XU
Authority: CN
Inventors: 周文俊; 喻剑辉; 王晓丰
Original assignee: Wuhan University WHU
Current assignee: Wuhan University WHU
Priority date: 2009-08-28
Filing date: 2009-08-28
Publication date: 2010-06-02
Anticipated expiration: 2019-08-28

Abstract

The utility model discloses a 10 KV post lightning arrester relating to lightning protection equipment. The 10 KV post lightning arrester comprises a wire-pressing block (1), an insulation cylinder (2), a composite outer sleeve (3) and steel feet (4), wherein the wire-pressing block (1), the insulation cylinder (2), and the steel feet (4) are sequentially connected from the top down; and the composite outer sleeve (3) is pressed and cast on the external surface of the insulation cylinder (2). The structure of the insulation cylinder (2) is as follows: springs (2.4) which are connected with each other up and down and a plurality of zinc oxide valve plates (2.1) are arranged in a cylinder (2.5), internal threads (2.3) are respectively arranged on an upper end head and a lower end head of the inner wall of the cylinder (2.5), and a plurality of pinholes (2.2) corresponding to the positions of the plurality of zinc oxide valve plates (2.1) are arranged in the middle of the inner wall. The 10 KV post lightning arrester integrates a lightning arrester with a post, is suitable for preventing the lightening-caused wire break of 10 KV overhead wires and reducing the lightning outage rate of wires, and is practical and economical.

Description

A kind of 10kV pillar lightning arrester

Technical field

This is practical to relate to a kind of lightning protection equipment, relates in particular to a kind of 10kV pillar lightning arrester; Specifically, relate to the protection equipment that a kind of 10kV overhead transmission line prevents lightning-caused breaking and reduces circuit or transformer station's tripping rate with lightning strike.

Background technology

The 10kV power distribution network belongs to medium voltage distribution network, it extends in the center or residential quarter of power load, directly the power supply in the face of users such as industrial and mining enterprises and residents needs, and play a part to form a connecting link and guarantee that the user powers, so the residing status of 10kV power distribution network is very important.Can guarantee system safety, economy, operation reliably, lightning protection measures be an essential condition.

The insulation level of 10kV distribution line is lower, and lightning stroke flashover takes place easily, to insulated conductor easily and then form power frequency arc and blow lead.Overhead distribution adopts insulated conductor, has solved corridor and safety problem that plain conductor cann't be solved; Insulated conductor is compared with cable, reduced investment, builds soon, and advantage is fairly obvious.But the lightning-caused breaking problem is more outstanding, and repeatedly insulated conductor lightning-caused breaking accident has appearred in the whole nation.According to on-the-spot ruuning situation, the 10kV plain conductor lightning-caused breaking accident or tripping rate with lightning strike also occur easily than higher, even the lightning-caused breaking accident also took place the 35kV plain conductor.The main cause that causes broken string is to build arc to form power frequency continued flow on the lightning stroke flashover passage, and the temperature of arc root is very high, can at short notice lead be blown, even plain conductor if the electric current that passes through is very big, also can blow lead.

The lightning protection measures that adopts has the overhead ground wire of installation, penetration type arc-preventing metal utensil, lightning protection pillar insulator and zinc oxide arrester etc. at present, and pluses and minuses are respectively arranged.

Summary of the invention

The purpose of this utility model just is to overcome the shortcoming and defect that existing lightning protection measures exists, and a kind of 10kV pillar lightning arrester is provided.The utility model is succinctly reliable, can reduce lightning outage rate when effectively preventing the lightning-caused breaking accident, improves the reliability of power supply.

The utility model adopts following technical scheme:

The utility model unites two into one post insulator and lightning arrester, by the natural grounding mode, need not to lay earth mat, reduces construction intensity, can prevent that lightning-caused breaking from reducing lightning outage rate simultaneously.

Specifically, the utility model comprises line ball piece, insulating cylinder, composite sheath and steel pin;

Line ball piece, insulating cylinder and steel pin are connected up and down successively; Composite sheath die casting is on the insulating cylinder outer surface.

The line ball piece is fixed in the insulating cylinder high-pressure side, is used to install and fix lead and packaging insulating tube, and its inner maintenance is sealed, and prevents to make moist;

Dress zinc oxide valve plate in the insulating cylinder, its height pressure side is connected with the steel pin with the line ball piece respectively, constitutes the agent structure of pillar lightning arrester, bears mechanical load;

Composite sheath die casting provides creepage distance and protects insulating cylinder to avoid the influence of atmosphere and other factors on the insulating cylinder outer surface;

The steel pin is fixed in the insulating cylinder low-pressure end, is used for supporting strut lightning arrester overall structure and packaging insulating tube, and its inner maintenance is sealed, and prevents to make moist.

Operation principle of the present utility model is:

The lightning overvoltage amplitude height of 10kV overhead distribution, discharge time is short, and the insulation level of 10kV power distribution network is low, lightning overvoltage can make insulator generation flashover, on the lightning stroke flashover passage insulated conductor is easily formed power frequency continued flow and blows lead.

When electrical network normally moves, because this pillar lightning arrester 1mA dc voltage value is much larger than distribution rated voltage and switching overvoltage, so can not move at system voltage and switching overvoltage lower supporting rod lightning arrester.Under lightning overvoltage, the action of this pillar lightning arrester is Low ESR, and lightning current is released into ground; After the lightning impulse, power-frequency voltage is carried on this pillar lightning arrester body, and the resistance moment change of body is big, and power frequency continued flow is interdicted fully, thereby prevents lightning-caused breaking and reduce lightning outage rate.

The utlity model has following advantage and good effect:

1, pillar and lightning arrester unite two into one, and satisfy the pillar of GB regulation and the technical parameter requirement of two products of lightning arrester simultaneously, and the discharge residual voltage is saved cost much smaller than the flashover voltage of insulator;

2, the pillar lightning arrester is applied mechanically the silicon rubber making outward, has good insulation performance performance and antifouling property;

3, the pillar lightning arrester has good operating characteristics, can prevent lightning-caused breaking and reduce lightning outage rate, dependable performance;

4, adopt pinking mode on the insulating cylinder in the pillar lightning arrester, the energy when having solved Explosion of on Arrester discharges problem, prevents that the pillar lightning arrester from damaging.

5, be applicable to 10kV overhead distribution and power station.

In a word, the utility model is integrated lightning arrester and pillar, is applicable to the anti-lightning strike broken string of 10kV overhead transmission line and reduces lightning outage rate, has practicality and economy.

Description of drawings

Fig. 1 is the utility model structure chart.

Wherein:

1-line ball piece,

1.1-metallic channel, the 1.2-contact electrode;

The 2-insulating cylinder,

2.1-zinc oxide valve plate, 2.2-aperture, 2.3-internal thread, 2.4-spring, 2.5-cylinder;

The 3-composite sheath;

4-steel pin,

4.1-contact electrode, 4.2-screw rod, 4.3-pad, 4.4-nut.

Embodiment:

Below pass through embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.

One, overall

As Fig. 1, the utility model comprises line ball piece 1, insulating cylinder 2, composite sheath 3 and steel pin 4;

Line ball piece 1, insulating cylinder 2 and steel pin 4 are connected up and down successively;

Composite sheath 3 die casting are on insulating cylinder 2 outer surfaces.

Two, functional block

1, the line ball piece 1

Line ball piece 1 is a kind ofly to be connected up and down with contact electrode 1.2 and the metal structure formed by metallic channel 1.1.

Metallic channel 1.1 is used to place lead;

Be provided with the external screw thread that the internal thread 2.3 with insulating cylinder 2 is complementary on the lower end surface of contact electrode 1.2, rise and tighten fixation.

2, insulating cylinder 2

Insulating cylinder 2 comprises zinc oxide valve plate 2.1, spring 2.4 and cylinder 2.5;

In cylinder 2.5, be placed with the spring 2.4 and a plurality of zinc oxide valve plate 2.1 that connect up and down;

At the inwall of cylinder 2.5, its upper and lower termination is respectively arranged with internal thread 2.3, is provided with and the corresponding a plurality of apertures 2.2 in a plurality of zinc oxide valve plates 2.1 positions in the middle of it;

Internal thread 2.3 by upper and lower termination is connected and fixed with line ball piece 1 and steel pin 4 respectively.

Can either be by aperture 2.2 with the portion of energy bleed off, prevent this pillar Explosion of on Arrester and damage, can guarantee the mechanical strength of this pillar lightning arrester again.

Between contact electrode 1.2 and zinc oxide valve plate 2.1, be placed with spring 2.4, keep in touch good.

3, composite sheath 3

Composite sheath 3 is a kind of two big cluster parachutes being arranged alternately and die casting insulating coatings on insulating cylinder 2 outer surfaces of two little cluster parachutes of comprising.

Large and small cluster parachute provides creepage distance and protection insulating cylinder 2 not to be subjected to the influence of external environment, and can seal.

4, the steel pin 4

Steel pin 4 is a kind of contact electrode 4.1, screw rod 4.2, pad 4.3 and nuts 4.4 that connect successively from top to bottom that comprise.

The internal thread 2.3 of the external screw thread of contact electrode 4.1 and insulating cylinder 2 lower ends is tightened fixing, keeps in touch well with aluminium backing between the upper end of contact electrode 4.1 and zinc oxide valve plate 2.1; By screw rod 4.2, pad 4.3 and nut 4.4 this pillar lightning arrester is fixed on the cross-arm of cement shaft tower.

Claims

1. A 10kV line post arrester, characterized in that:

Including crimping block (1), insulating cylinder (2), composite jacket (3) and steel foot (4);

The crimping block (1), the insulating cylinder (2) and the steel foot (4) are connected up and down in sequence;

The composite jacket (3) is die-cast on the outer surface of the insulating cylinder (2).

2. A 10kV post arrester according to claim 1, characterized in that:

The wire crimping block (1) is a metal structure formed by connecting the wire groove (1.1) and the contact electrode (1.2) up and down;

An external thread matching the internal thread (2.3) of the insulating cylinder (2) is provided on the surface of the lower end of the contact electrode (1.2).

3. A 10kV post arrester according to claim 1, characterized in that:

The insulating cylinder (2) includes a zinc oxide valve plate (2.1), a spring (2.4) and a cylinder (2.5);

Inside the cylinder (2.5), a spring (2.4) connected up and down and a plurality of zinc oxide valve pieces (2.1) are placed;

Internal threads (2.3) are provided on the inner wall of the cylinder (2.5) at its upper and lower ends respectively, and a plurality of small holes (2.2) corresponding to the positions of the plurality of zinc oxide valve pieces (2.1) are arranged in the middle.

4. A 10kV post arrester according to claim 1, characterized in that:

The composite jacket (3) is an insulating jacket that includes two large umbrella groups and two small umbrella groups arranged alternately and is die-cast on the outer surface of the insulating cylinder (2).

5. A 10kV post arrester according to claim 1, characterized in that:

The steel foot (4) is composed of a contact electrode (4.1), a screw (4.2), a washer (4.3) and a nut (4.4) sequentially connected from top to bottom.