CN1034838C

CN1034838C - Electric line firing source simulator

Info

Publication number: CN1034838C
Application number: CN94100988A
Authority: CN
Inventors: 杨稔芳
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-02-05
Filing date: 1994-02-05
Publication date: 1997-05-07
Anticipated expiration: 2014-02-05
Also published as: CN1096605A

Abstract

The present invention relates to an electric line firing source simulator. One end of an isolating transformer (1) is connected with a common power supply while the other end is connected with a simulation circuit. The electric line firing source simulator which is a concentrated electrical fire laboratory has the advantages of simple structure and portability. The electric line firing source simulator can be used as a special teaching apparatus in fire fighting department. Meanwhile, the electric line firing source simulator can be used as an audio-visual teaching apparatus for popularizing electrical knowledge in schools, and the electric line firing source simulator makes people know the danger of electrical fires and deeply understand the electrical fires.

Description

Electric line firing source simulator

The invention belongs to electric calorifie installation, especially for the instruments used for education of security against fire.

Along with expanding economy, electrical equipment is a large amount of uses of household electrical appliance particularly, electrical fire year number of times accounted for 30% of the whole nation year fire sum.The main cause that electrical fire produces is that electric leakage, short circuit, overload and the contact resistance of circuit is excessive.Phenomenon on fire only could take place under the electrical hazard state, is difficult to the person of being studied or the educatee sees intuitively.As think that the electric leakage of repetition electric wiring, short circuit, overload and contact resistance are excessive, and produce the phenomenon of catching fire, on existing electric wiring, do experiment, promptly violated national electrical safety operating standard, simultaneously personal safety is also had very big danger.For this problem of research, need set up huge laboratory as special.But as national basic general knowledge education, this task can not be born again in the laboratory.

The purpose of this invention is to provide a kind of can be portable and on normal electric wiring the simulation phenomenon of catching fire, promptly safety does not influence the ignition source simulator of the normal operation of electric wiring again.

Principal feature of the present invention be isolating transformer 1 one ends by on public power, the other end is connected to a mimic channel 2.

The present invention is a concentrated electrical fire laboratory, simple in structure, be easy to carry, it can be used as the experimental facilities of fire-fighting professional teaching, also can be used as the instruments used for education intuitively of the universal electric fireproof knowledge of school simultaneously, make people understand the danger of electrical fire, deepen understanding electrical fire.

Fig. 1 is the simulator block diagram.

1 is isolating transformer, the 2nd among the figure, mimic channel, the 3rd, load, the 4th, test instrumentation.

Fig. 2 is the simulator wiring diagram.

Fig. 3 is the leak(age) test wiring diagram.

Fig. 4 is the short-circuit test wiring diagram.

Fig. 5 is the overload trial wiring diagram.

Fig. 6 is a circuit loose contact wiring diagram.

Below in conjunction with accompanying drawing in detail the present invention is described in detail.It mostly is electric reason of catching fire that electric leakage, short circuit, overload, contact resistance are crossed.These phenomenons only could take place under the electric fault state, are difficult to be seen by people.And test does not allow to do on the electric wiring of normal operation.The present invention has adopted safety isolating transformer, and hookup and production, household electricity are separated.Can or not damage electrical equipment owing to electrical fire experiment causing fire.What the test operation person used simultaneously is safe voltage, and the warranty test personnel do not have to get an electric shock in any situation takes place.Be connected to insurance on the transformer, in case test protection transformer when accident occurring.

Discuss electric leakage, short circuit, overload below respectively, hinder test situation such as excessive by electric shock.

1, electric leakage

Know that by Fig. 3 on the elementary termination public power of isolating transformer, the voltage of secondary output is safe voltage.Simultaneously on secondary, be serially connected with reometer and load bulb.The L1 that connects on secondary, the line of L2 are directly than time little order of magnitude in line line footpath.Before test, a on L1, the L2, b are carried out processing chemistry or machinery at 2, make it to produce leaky.L1 and L2 not near before, connect the load bulb and make it luminous.L1, L2 are close, and reometer has demonstration, and bulb is still luminous.L1 and L2 the closer to, the reometer number is big more.With the test agrafe, press from both sides a little cotton and be placed on the leak source simultaneously, electric leakage at this moment just can be ignited cotton.

2. short circuit

Known that by Fig. 4 the isolated high-voltage device is elementary to be connected on the public power, the voltage of secondary output is safe voltage.On secondary, be serially connected with reometer and load.Lead L1 that connects on secondary and the line of L2 footpath are less than the order of magnitude in transformer secondary output winding wire footpath.2 of a, b remove insulation with mechanical means.Lead L1 and L2 are put into saline solution, 2 of a, b are maintained a certain distance in salt solution.Make two contacts of a, b with insulation rod, at this moment the edge edge grate firing of L1 and L2 burns.If the place, contact puts cotton when a, b two press and touch, then make the cotton burning, because the line of lead L1 and L2 footpath is less than the order of magnitude in isolating transformer line footpath, so can not damage isolating transformer.

3, overload

Known that by Fig. 5 isolating transformer is elementary to be connected on the public power, the voltage of secondary output is safe voltage, is connected to reometer and load lamp box on secondary.Some bulb parallel connections are arranged in the lamp box.The line footpath of lead L1 and L2 is less than the order of magnitude in transformer secondary output winding wire footpath.Simultaneously L1 and L2 are bare copper wires, and at this moment the switch of the lamp lamp inside the box that closes one by one puts a cotton on copper cash, when the switch of lamp is incorporated into some, can L1 take place, L2 reddens, cotton burning, overladen situation that Here it is.

4, circuit loose contact

Know that by Fig. 6 isolating transformer is elementary to be connected on the public power.The voltage of secondary output is safe voltage.Be connected to load on secondary, the line footpath of lead L1, the L2 that connects on secondary is less than the order of magnitude in transformer secondary output winding wire footpath.Insulated conductor is connected on the binding post, makes one of them some a loose contact.After closing a switch, the close switch of lamp of order makes electric current reach certain value, the lead L1 of order with the moving a of insulated tongs pincers, can see lead generation spark, if put a fritter cotton, then can burn.

Claims

1. electric line firing source simulator, it is characterized in that the isolating transformer (1) that is output as safe voltage terminates on the public exchange electrical network, the other end is connected to an electric ignition source mimic channel (2), and said mimic channel is test instrumentation and the load that is connected on the transformer secondary output.

2. by the described electric line firing source simulator of claim 1, the line footpath that it is characterized in that being connected on the mimic channel of isolating transformer (1) on secondary is than the little order of magnitude in secondary wire astragal footpath.

3. by the described electric line firing source simulator of claim 1, it is characterized in that tunable load (3) is attempted by on the mimic channel.