CN2430829Y

CN2430829Y - Static protector

Info

Publication number: CN2430829Y
Application number: CN 00236700
Authority: CN
Inventors: 陈斌; 彭玉隆
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-05-29
Filing date: 2000-05-29
Publication date: 2001-05-16
Anticipated expiration: 2010-05-29

Abstract

The utility model relates to a static protector, which removes the accumulation of induced charges in the higher positions of metallic pipelines on the ground or metallic cables caused by thundercloud to provide a potential strike point for the lightning leader. The traditional safe protection device generally uses a lightning protection tube or a current limiter as a chief device. The principle of anti-lightning attack is to relieve impact caused by the strike. The technology of the static protector is characterized in that the accumulation of the induced charges on the metallic pipelines or the overhead metallic cables can be removed. The metallic pipelines can not become the potential strike points, and the safety of the device can be protected.

Description

Electrostatic protector

The utility model relates to a kind of metallic conduit and aerial cable forms the electrostatic protection device of launch aing surprise attack, genus overvoltage and overcurrent protective device and lightning arrester because of the induction field that thundercloud produces.

When thundercloud passes through this locality, between cloud base and the earth, can produce electric field, on ground metal pipeline or overhead metal wire cable, will produce charge inducing.And at the higher position of relative position of metallic conduit or overhead metal wire cable, charge inducing can produce accumulation, often provides potential launch aing surprise attack a little for the lightning guide.Cause thunder and lightning attack or high induction voltage destruction to equipment.The modes such as overvoltage and the overcurrent protective device that lightning or high induction voltage attack, the lightning-arrest pipe of general employing, flow restricter that prevent in the past.Application number is 962138827 Chinese patents that are called the high-frequency signal lightning arrester and at present commercially available anti-lightning strike electronic current limiter etc., and all belonging to provides safeguard protection to lightning attack.These safety guards often because strong excessively lightning attack causes the damage of device itself, make it forfeiture and provide protection to equipment.This is the weak point of metal current pipeline lightning proof.

The purpose of this utility model be to provide a kind of clear up above-mentioned because of the thundercloud electric charge accumulation district that ground metal pipeline or overhead metal wire cable produce of passing by; avoid forming on metallic conduit or the overhead metal wire cable lightning guide's potential launch aing surprise attack a little, reach protection equipment.

The major technique of electrostatic protector of the present utility model is characterised in that provides a pulsed discharge switching circuit between metallic conduit or wire rope and ground wire.That is to say,,, will produce electric charge accumulation at its higher position in case on metallic conduit or wire rope, there is charge inducing to form.As long as the electric charge of this accumulation is constantly imported buried ground wire by ground wire, will avoid forming the electric charge accumulation district at the higher position of this metallic conduit or metal aerial cable, eliminated and should form the potential condition of launch aing surprise attack a little of lightning guide in the zone.

Specifically being constructed as follows of electrostatic protector of the present utility model: attaching plug 1 is connected with mains supply, and power line 2 is connected with a pulse power supply change-over circuit 12 by transformer 3.The input port of transformer 3 is connected with zero line 5 with the live wire of power line 4.The output port of transformer 3 be connected in series diode 6 and relay 7.Be connected a pulse-switching circuit 13 between the higher position of metal pipe line or overhead metal wire cable and ground wire 11, this circuit is made up of the pulse switch 9 and the filtering capacitor 10 of parallel connection.The control port of switch 9 is connected with pulse power supply change-over circuit 12 in the arteries and veins.Provide pulse current by pulse power supply change-over circuit 12 for pulse switch 9.The function of filtering capacitor 10 is to separate the frequency influence that pulse switch 9 caused that disappears.

When attaching plug 1 energized, will produce 50Hz alternating current with the civil power same frequency at the output port of transformer 3, under the effect of diode 6, what form on the loop is a pulse current, relay 7 by this pulse current control series connection, by relay 7 control impuls switches 9, the final on-off action that on pulse switch 9, produces 50Hz.Major technique feature of the present utility model just is to be connected a pulse switch between the higher position of metallic conduit or overhead metal wire cable and ground wire, make to keep the long state of opening between the higher position of metallic conduit or aerial cable and the ground wire, can not keep the long state that closes.And this pulse open and-shut mode but is that the accumulation of eliminating the charge inducing of thundercloud has produced peculiar effect.Electrostatic protector of the present utility model utilizes the civil power of 50Hz,, need not to add oscillation circuit and promptly can be pulse switch 9 electric current in the arteries and veins is provided directly for pulse power supply change-over circuit 12 provides power supply by transformer.Therefore, it has, and device structure is simple, and components and parts are few, the advantage of being convenient to process.Because the employed components and parts of electrostatic protector of the present utility model are the general low-cost device that the market is bought easily, so just greatly reduce the utility model cost again.Output one end of the present utility model is connected with metal pipe line, and the other end is connected with ground wire.If power supply has live wire, zero line and ground wire, then the utility model only needs an output line to be connected with metal pipe line to get final product.Therefore, the utility model has the advantage of installation easy to use again.

Fig. 1 is a circuit diagram of the present utility model.

Fig. 2 is a structure composition diagram of the present utility model.

Fig. 3 is an example structure composition diagram of the present utility model.

Fig. 4 is the schematic appearance of embodiment.

Among the figure: the 1st, attaching plug, the 2nd, power line, the 3rd, transformer, the 4th, live wire, the 5th, zero line, the 6th, diode, the 7th, relay, the 8th, isolation resistance, the 9th, pulse switch, the 10th, filter capacitor, the 11st, ground wire, the 12nd, pulse power supply change-over circuit, the 13rd, pulse-switching circuit, the 14th, pulse switch output port, the 15th, circuit board, the 16th, protecting cover, the 17th, binding post.

Provide an embodiment of electrostatic protector of the present utility model below.The attaching plug 1 of present embodiment is selected the attaching plug with ground connection for use.Power line 2 is selected three stamen lines for use.Transformer 3 is selected WX-100 type transformer for use.Relay 7 is selected JRX-4 type relay for use.Pulse switch is selected semiconductor switch for use, and capacity all can greater than 5 watts.Filter capacitor is selected 220V0.047 μ F electric capacity.Between live wire 4 and zero line 5, connect a WHY620 piezo-resistance as isolation resistance 8.The 14th, the output port of pulse switch is connected with metallic conduit or wire rope.The utility model embodiment is the board-like electrostatic protector of a kind of wiring.Concrete connected mode is as follows: power line 2 one ends are connected with attaching plug 1, and the other end is connected with transformer 3.The input port of transformer 3 is connected with zero line 5 with live wire 4.The output of transformer 3 is connected with pulse power supply change-over circuit 12.Transformer 3, diode 6, relay 7, piezo-resistance 8, filter capacitor 10 and pulse switch 9 all are installed on the circuit board 15.The 16th, protecting cover.The 17th, binding post is used for being connected with metal pipe line.Circuit board 15 is screwed on the base of terminal block.Between ground wire 11 and live wire 4, be connected WHY620 type piezo-resistance as isolation resistance 8.Be not difficult to find out that the utility model provides the board-like electrostatic protector of a kind of power supply wiring.

Claims

1. electrostatic protector; form by power line, transformer, discharge tube and terminal block; it is characterized in that live wire is connected with the input port of transformer with zero line; a break-make change-over circuit is connected in series between the output port of transformer; be connected switching circuit between power line and ground wire, the break-make change-over circuit connects the operation of switching circuit control switch circuit.

2. according to the described electrostatic protector of claim 1; it is characterized in that the break-make change-over circuit that is connected in series between the output port of transformer is made up of diode and relay; direct current in the arteries and veins of diode output makes the relay of series connection with it produce the conversion of pulse break-make.

3. according to claim 1 and the described electrostatic protector of claim 2; it is characterized in that the switching circuit that is connected between power line and the ground wire is made up of the pulse switch and the filter capacitor of parallel connection; the control line of pulse switch is connected with pulse break-make change-over circuit, by the switching of pulse break-make change-over circuit control impuls switch.