CN103441483A

CN103441483A - Lightning arrester device

Info

Publication number: CN103441483A
Application number: CN201310384815XA
Authority: CN
Inventors: 董兴华; 丛万生; 杨双业; 严亮; 蒋合艳
Original assignee: Baoji Oilfield Machinery Co Ltd
Current assignee: Baoji Oilfield Machinery Co Ltd
Priority date: 2013-08-29
Filing date: 2013-08-29
Publication date: 2013-12-11

Abstract

The invention discloses a lightning arrester device which comprises a lightning arrester, the lightning arrester is arranged on a bottom base through insulation supporting, the lightning arrester is connected with a down lead, the outer circumference of the down lead is sleeved with a current transformer, and the current transformer is connected with a detecting device. A cable structure of the down lead is sequentially provided with a copper conductor, a first semiconductor, a first insulation layer, a second semiconductor layer, a shielding layer and a second insulation layer from the inner layer of the cable structure to the outer layer of the cable structure. According to the lightning arrester device, due to the fact that insulation supporting and the down lead with multiple layers of insulation shielding structures are adopted, resistance is increased and thunder and lightning breakdown are prevented, and the fact that the current generated by the thunder and lightning is led away in a designed direction is ensured; the current transformer and the detecting device can judge whether currents flow through the lightning arrester device, and whether the whole set of the system is good in contact can be detected, and personal and equipment safety can be protected to the largest extent.

Description

A kind of lightning arrester

Technical field

The invention belongs to the lightning protection technical field, relate to a kind of lightning arrester.

Background technology

Lightning arrester is the security system that guarantees the normal operation of electrical system and personal safety, the indispensable important component parts of large-scale outfit such as all kinds of buildings, maritime platform, due in recent years to lightning-arrest relevant standard with require all the more strict and harsh, a lot of new technical standards have been carried out refinement to the requirement of lightning arrester, are mainly some below must meeting:

1) between the apparatus body that lightning arrester will and be protected, accomplish insulation and anti lightning instantaneous breakdown.2) interference of the magnetic field of avoiding lightning current to produce to external equipment.3) can detect and whether have device loose contact (as aging as burn into etc.) problem, guarantee normal use.

Therefore, for the lightning arrester of new national standard development high reliability, just very necessary.

Summary of the invention

The purpose of this invention is to provide a kind of lightning arrester, solved the downlead technical performance existed in the prior art on the low side, can not realize the problem automatically detected.

The technical solution adopted in the present invention is that a kind of lightning arrester, comprise arrester, arrester is arranged on bottom support bracket by insulating supporting, arrester is connected with downlead, on the downlead periphery, is set with current transformer, and current transformer separately is connected with checkout gear.

Lightning arrester of the present invention, its characteristics also are:

The cable structure of downlead is set gradually as copper conductor, the first semiconductor layer, the first insulating barrier, the second semiconductor layer, screen, the second insulating barrier to skin by internal layer.

Insulating supporting material selection composite glass fiber.

Adopt ambroin between the holder of downlead and arrester.

The invention has the beneficial effects as follows, by using the downlead of insulating supporting and multilayer insulation shielding construction, increase resistance and prevent that thunder and lightning from puncturing, and guarantee that the thunder and lightning generation current leads away according to design direction.Whether current transformer, arranging of checkout gear can judge whether the electric current mistake simultaneously, thereby detect whole system, contact intact.For the problem run in lightning-arrest relevant standard set-up and use, guarantee meeting on the basis of up-to-date relevant criterion, protect to greatest extent safety personal and equipment.

The accompanying drawing explanation

Fig. 1 is the structural representation of apparatus of the present invention;

Fig. 2 is the multilayer insulation shielded cable hierarchy schematic diagram of downlead in apparatus of the present invention.

In figure, 1. insulating supporting, 2. downlead, 3. current transformer, 4. checkout gear, 5. copper conductor, 6. the first semiconductor layer, 7. the first insulating barrier, 8. the second semiconductor layer, 9. screen, 10. the second insulating barrier, 11. arresters.

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.

Device of the present invention is mainly considered based on 3: the 1) specification requirement of integral insulation design and anti lightning instantaneous breakdown.The specification requirement of the factors such as the magnetic field that 2) lightning current produces through this device, instantaneous breakdown.3) this device can be realized automatic detection in the actual installation position, guarantees the reliability of equipment.

With reference to Fig. 1, the structure of apparatus of the present invention is to comprise arrester 11, arrester 11 is arranged on bottom support bracket by insulating supporting 1, arrester 11 is connected with downlead 2, on downlead 2 peripheries, is set with current transformer 3, and current transformer 3 separately is connected with checkout gear 4;

With reference to Fig. 2, the cable structure of the downlead 2 in apparatus of the present invention is to be set gradually as copper conductor 5, the first semiconductor layer 6, the first insulating barrier 7, the second semiconductor layer 8, screen 9, the second insulating barrier 10 to skin by internal layer.

Insulating supporting 1 material selection composite glass fiber, insulating supporting 1, by arrester 11 and bottom support bracket isolation, is guaranteed both insulation; By to concrete environment for use analysis, and then select suitable thickness and width to guarantee can not punctured by thunder and lightning.

Between the holder of downlead 2 and arrester 11, adopt ambroin that both are isolated, accomplish between guaranteeing that insulation and thunder-lightning puncture.

Current transformer 3 is sleeved on downlead 2 excircles, and both are directly contact not, and whether if there is the electric current of detection current flowing instrument transformer 3 just can capture, then it is reliable to detect a whole set of lightning arrester integral body by checkout gear 4.

The technical characterstic of apparatus of the present invention is mainly reflected in three aspects:

1) cable of downlead 2 adopts multilayer insulation shielding hierarchy (this is also the maximum innovative point of this device)

After the cable of downlead 2 of the present invention adopts multilayer insulation shielding hierarchy, the interference of the magnetic field of having avoided lightning current to produce to external equipment, guarantee the normal use of equipment.In existing lightning arrester, the cable structure of downlead 2 is all to adopt to meet the individual layer armouring insulated cable that electric power is carried requirement, and both differences are as following table 1.

Table 1, downlead of the present invention and the common technology contrast that connects lead-in cables of the prior art

Multilayer insulation shielding hierarchy of the present invention is designed according to the lightning current characteristic, and the multilayer insulation shielding that this structure adopts is progressively to reduce the impact of lightning current by the sublevel echelon, and then accomplishes insulation and anti lightning instantaneous breakdown; The introducing of screen 9 is the interference to external equipment of the magnetic field that produces for fear of lightning current.

2) detection of device reliability

Whether with reference to Fig. 1, current transformer 3 reliably is connected with checkout gear 4, utilizes electromagnetic induction principle, has judged whether that electric current flows through, thereby detect package unit, contact intact.

While usually detecting, an additional artificial power supply that detects on arrester 11, when current transformer 3 and checkout gear 4 can detect electric current and flow through, can judge that this device is still reliable, if just can't detect, illustrates fault is arranged, and will investigate reason.In the thunder and lightning situation, when having lightning current to flow through, equally also just can detect whole system and whether contact intact.Such benefit is that collection point does not directly contact with downlead 2, has avoided puncturing due to the thunder and lightning that the reasons such as downlead 2 is aging cause, and the situation of damage checkout gear occurs, and lightning arrester just can detect the problem that whether has the device loose contact in installation site.

Existing detection mode is at arrester 11(individual equipment, containing downlead 2) on the Special experimental platform, detect before dispatching from the factory, once on-the-spot actual installation is complete, can only retrain by technique, the effective detection means of neither one checks whether a whole set of lightning arrester contacts well, once being exactly this device, the direct result caused so in use comes in contact bad problem, can't detect in time, just the thunder and lightning drawn can't be led away by design, and if the thunder energy of assembling is not rationally discharged, will cause the loss of the person and equipment.

3) adopt insulating supporting 1 between arrester 11 and bottom support bracket

Existing lightning Protection Project is all to adopt steel pipe to do support, then and between bottom support bracket welds, although intensity is guaranteed like this, when thunderbolt, still likely exists electric current not lead away along lower lead-in wire, and causes the situation of casualties to occur.

And adopting insulating supporting 1 between the arrester 11 of apparatus of the present invention and bottom support bracket, the preferred composite glass fiber of material is isolated both, guarantees to accomplish insulation between the two; By to concrete environment for use analysis, can select suitable thickness and width to guarantee can not punctured by thunder and lightning.

Claims

1. a lightning arrester, its characteristics are: comprise arrester (11), arrester (11) is arranged on bottom support bracket by insulating supporting (1), arrester (11) is connected with downlead (2), be set with current transformer (3) on downlead (2) periphery, current transformer (3) separately is connected with checkout gear (4).

2. lightning arrester according to claim 1, its characteristics are: the cable structure of described downlead (2) is set gradually as copper conductor (5), the first semiconductor layer (6), the first insulating barrier (7), the second semiconductor layer (8), screen (9), the second insulating barrier (10) to skin by internal layer.

3. lightning arrester according to claim 1 and 2, its characteristics are: described insulating supporting (1) material selection composite glass fiber.

4. lightning arrester according to claim 1 and 2, its characteristics are: between the holder of described downlead (2) and arrester (11), adopt ambroin.