CN2294393Y - Igniter using electrically-produced sparks - Google Patents

Abstract

The utility model provides an igniter for igniting fuel oil and coal powder for industrial furnaces, which is composed of a transformer, a relay, an electrode, etc. Alternating current power supplies are connected with both ends of the primary coil of the transformer through an automatic switch. One end of the first coil is simultaneously connected with a root of intermediate tap line of a coil. The leads of both ends of the secondary coil of the transformer are respectively connected with both ends of the electrode through a current limiting resistor and the relay. One normally closed contact point of the relay is connected between the central tap of the primary coil and the connecting line of one end of the primary coil in series. The other normally opened contact point is connected with both ends of the current limiting resistor in parallel. The utility model has the advantages of big energy of fire, long duration time, simple structure, etc.

Description

The polar arc igniter

The utility model content belongs to the burner igniting device field, relates to a kind of ignition that is suitable for various fuel oils, industrial coal powder boiler use.

General-purpose industrial stove high-energy igniter is a capacitance energy storage discharge-type igniter at present, utilize high-voltage capacitor to produce the strong electric spark fire fuel of discharge during work, but deficiencies such as this class igniter also has ignition energy less (only can directly light light oil, heavy oil, the dregs of fat etc., directly firing coal-dust), duration weak point, complex structure to a great extent, cost is high and be unsuitable for applying on the back yard industry stove.

The purpose of this utility model is to overcome the above-mentioned weak point of existing in prior technology, provide a kind of simple in structure, cost is low, ignition energy is big and the polar arc igniter being convenient to apply on various industrial furnaces.

Polar arc igniter provided by the utility model is that a kind of high temperature of electric arc generation between electrode that utilizes is lighted by the igniter of combustion material, its theory structure as shown in drawings, it is by power supply, two utmost point automatic switch ZK, transformer Tc, electric current relay J, current-limiting resistance R ₃Form with electrode DJ, AC power is added on transformer Tc primary coil two ends through automatic switch ZK, and the end lead-out wire while of primary coil links with a centre tap lead-out wire of primary coil, and transformer TC secondary coil two ends lead-in wire is respectively through resistance R ₃With the two ends of relay J access sparking-plug electrode DJ, described relay J has a normally closed contact J ₁With a normal opened contact J ₂, normally closed contact J wherein ₁Be serially connected in the primary coil centre tap between the line of primary coil one end, normal opened contact J ₂Be connected in parallel on current-limiting resistance R ₃Two ends.In the real work, this polar arc igniter is to utilize high voltage with the gas between breakdown electrode DJ at first, forms electric arc between electrode, reduces the voltage that is added on two electrodes then, strengthens the electric current that produces electric arc, gives me a little the burner fluid fuel with the high temperature that electric arc produces.

Adopt that the ignitor of such scheme design has that ignition energy is big, longer duration, simple in structure, low cost and other advantages, it not only can light light oil, heavy oil, the dregs of fat, directly firing coal-dust.

Accompanying drawing is the electrical block diagram of a specific embodiment of the utility model.

With reference to accompanying drawing, transformer Tc primary coil two ends link with the two poles of the earth stationary contact of automatic switch ZK respectively in this polar arc igniter, and the centre tap lead-in wire of primary coil is simultaneously through relay normally closed contact J ₁Also be connected with its end lead-in wire, the two ends lead-in wire of transformer Tc secondary coil is then respectively through resistance R ₃With the two ends of electric current relay J access electrode DJ, relay normally open contact J ₂With current-limiting resistance R ₃In parallel.Concrete enforcement on the structure, at the normally closed contact J of electric current relay ₁To also being serially connected with one between the line of automatic power switch ZK one utmost point by bidirectional triode thyristor V, adjustable potentiometer R ₁, resistance R ₂The regulating circuit that constitutes with capacitor C, wherein second electrode of controllable silicon V and first electrode respectively with a utmost point stationary contact and the relay normally closed contact J of automatic switch ZK ₁Link adjustable potentiometer R ₁Two ends respectively with silicon controlled second electrode and control the utmost point link capacitor C and resistance R ₂Series connection forms the resistance-capacitance network circuit, and its two ends join with second electrode and first electrode of bidirectional triode thyristor V respectively, are used for the overvoltage protection to bidirectional triode thyristor V.

The course of work of this example structure is such: closed automatic switch ZK, power supply just are added on the primary coil of transformer Tc, because of the normally closed contact J of electric current relay J ₁Be in closure state this moment, so the part number of turn coil of transformer is by short circuit, so the transformer of this moment is actually a stepup transformer.So just on the secondary coil of transformer Tc, induce higher voltage, this high voltage is added on the electrode DJ, make interelectrode gas breakdown, thereby there is electric current to pass through gas and forming electric arc between electrode (because after producing electric arc between electrode, interelectrode voltage drop is very little, so the resistance R of connecting ₃In order to the limiting transformer secondary current).The electric current that flows through between electrode is the electric current of transformer secondary just, and this electric current makes electric current relay J work simultaneously again.So normally closed contact J of electric current relay ₁Disconnect normal opened contact J ₂Closed.Normally closed contact J ₁After the disconnection, transformer Tc becomes reducing transformer by stepup transformer, and high voltage-small current is become low-voltage, high-current.And normal opened contact J ₂After the closure, short circuit current-limiting resistance R ₃, the electric current that flows through electrode DJ is increased, formed strong electric arc, the temperature that this electric arc produced is very high, except that lighting the fuel oil, can also direct firing coal-dust.When overload or short circuit appearred in circuit, automatic switch ZK tripping operation was cut off the electricity supply with protection circuit, and automatic switch ZK also plays the on-off action of a deciliter power supply simultaneously.Adjustable potentiometer R in the holding circuit ₁Can be among a small circle the regulating load electric current.

Claims (2)

1, a kind of polar arc igniter that is used for Industrial Boiler is by power supply, two utmost point automatic switch ZK, transformer Tc, electric current relay J, current-limiting resistance R ₃Form with electrode DJ, it is characterized in that AC power is added on transformer Tc primary coil two ends through automatic switch ZK, the end lead-out wire while of primary coil links with a centre tap lead-out wire of coil; Transformer TC secondary coil two ends lead-in wire is respectively through resistance R ₃With the two ends of relay J access electrode DJ, described relay J has a normally closed contact J ₁With a normal opened contact, wherein normally closed contact J ₁Be serially connected in the primary coil centre tap between the line of primary coil one end, normal opened contact J ₂Be connected in parallel on current-limiting resistance R ₃Two ends.

2, polar arc igniter as claimed in claim 1 is characterized in that at electric current relay normally closed contact J ₁Be serially connected with one by bidirectional triode thyristor V, potentiometer R between a utmost point line of power switch ₁, resistance R ₂The regulating circuit that constitutes with capacitor C, wherein second electrode of controllable silicon V and first electrode respectively with a utmost point stationary contact and the relay normally closed contact J of automatic switch ZK ₁Link potentiometer R ₁Two ends respectively with silicon controlled second electrode and control the utmost point link capacitor C and resistance R ₂Series connection forms the resistance-capacitance network circuit, and its two ends join with second and first electrode of controllable silicon V respectively.