CN2271216Y

CN2271216Y - Electronic fireproof detecter

Info

Publication number: CN2271216Y
Application number: CN 96246229
Authority: CN
Inventors: 孙光烈
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-12-31
Filing date: 1996-12-31
Publication date: 1997-12-24
Anticipated expiration: 2006-12-31

Abstract

The utility model relates to an electronic fireproof detector, which comprises a shell, a thermally-sensitive element and a detection circuit. The electronic fireproof detector is characterized in that the shell comprises a bottom board which is corresponding to the profile of a power supply device; the thermally-sensitive element is arranged on the bottom board, and is mutually connected with the detection circuit through a photosensitive switch; the detection circuit can be connected with an alarm through an optical cable. The detector is arranged on an insulating body or a conductive body of an electrical device. The electronic fireproof detector can reliably conduct fire and alarm in time, and is sensitive and correct and has no mistaken movement. Detector elements have memory function and are not required to be replaced after repeatedly used for myriad times. The utility model is especially suitable for applying to fire prevention and monitoring on electrical appliances for supplying power and carrying current.

Description

The fiery detector of electricity

The utility model relates to the electric fiery sniffer of high and low voltage electrical equipment equipment in the electric power system.

At present, the power-supply unit fire fighting detector of domestic use has two kinds of methods.First sense cigarette type is promptly smoldered because of circuit burns when power-supply unit and is reported to the police with photoelectric effect, and this method is by the long-distance communications factor, and error is bigger, is subjected to extraneous shadow to being prone to malfunction action or the motionless dead band that makes.It two is to be coated on the power-supply unit by its temperature of artificial supervision with paraffin wax, takes to report to the police when the too high paraffin wax of device temperature melts to smolder to wait afterwards, and this method warning is untimely, and neither science is unhygienic again.

The purpose of this utility model is to provide a kind of automatic warning error little, no misoperation, reliably electric timely fiery detector.

The fiery detector of this electricity, comprise housing, thermal sensing element and detection circuit, it is characterized in that housing contains and power-supply unit contour structures respective base, the dress thermal sensing element joins by light activated switch and detection circuit on the base plate, and detection circuit can be by optical cable device taking alarm.Positive electricity crimping R resistance, normally closed switch ground connection in the described detection circuit, positive electricity crimping R ₂Resistance, triode b ₂-b ₁, R ₁To electric 0 point, T to 0 of positive electricity crimping controllable silicon and b ₁Point, positive electricity crimping R ₃Resistance, pilot lamp are to zero point, and positive voltage and zero point are drawn device taking alarm by optical cable.Described thermal sensing element adopts memorial alloy (8MA) or bimetallic strip.

The logical optical cable of the fiery detector of electricity is connected supporting use with alarm, be mainly used in high voltage isolator, lightning arrester, oil switch, current transformer, voltage transformer (VT), and cable intermediate joint and cable are first-class.If be applied in cable intermediate joint, the emitter in the detector can be installed on the inside fire alarm, and when electric fire failure took place cable, the closed receiving trap of detector was reported to the police.If thermal sensing element adopts the electric fiery detector best results of memorial alloy (8MA).Because memorial alloy has SME, with its set point of temperature value.The equipment adstante febre that breaks down, temperature reaches a certain amount of and overflows, marmem suddenly from first model deformation to second form.The thermal sensing element of detector directly is attached to power-supply unit insulator or current, when the equipment heating of breaking down, when temperature reaches certain value, the equipment temperature difference is actually signal, signal is through extracting the detection circuit system that gives, the fiber optic conduction fire-alarm is reported to the police, and reaches the reliable order ground of in time reporting to the police of power system power supply equipment electricity fire.Temperature is reduced to normal temperature after electric fault is handled, and memorial alloy is returned to first form from second form again.And change of shape is highly stable, and can repeat up to a million times does not need to change element.Be active in one's movements, accurately.Thermal sensing element adopts bimetallic strip and cold plastics also can.

Fig. 1 is electric fiery detector cut-away view.

Fig. 2 is Fig. 1 left view.

Fig. 3 is the detection circuit schematic diagram.

Be described in further detail concrete structure of the present utility model below in conjunction with drawings and Examples.

The electric fiery detector that is contained on the current carring cable shown in Figure 1, the shape of base plate 1 is corresponding with the cable contour structures, can be mounted on stably on the cable, and insulation shell 3 connects firmly by bolt 11 and base plate.Dividing plate 2 divides upper and lower chamber dress light activated switch 6 and detection circuit plate 7 with housing, retaining shell 9 directly is loaded on the base plate by door 10 in the cavity of resorption, regulate nut 12 adjustable springs 13 are determined thermal sensing element 8 greater than left side elastic force position, thermal sensing element adopts memorial alloy 8MA material, can on push rod 14, slide, bar flexibly connects with touch panel 4, and the thermal sensing element heating is held the push rod promotion touch panel 4 pressure contacts 5 that move to left tightly the normally closed contact on the circuit board is opened when cable temperature raises.Be zero before capacitance voltage is opened, open the back and make electric U by the resistance R charging _oRaise gradually, work as U _oWhen reaching honeybee point, D-D ₁Become conducting, capacitance voltage is through D-D ₁To resistance R ₁Discharge is at R ₁Pulse voltage of output on the resistance, pulse voltage control controllable silicon T makes alarm loop conducting warning (see figure 3).

Claims

1, the fiery detector of a kind of electricity, comprise housing, thermal sensing element and detection circuit, it is characterized in that housing contains and power-supply unit contour structures respective base, the dress thermal sensing element joins by light activated switch and detection circuit on the base plate, and detection circuit can be by optical cable device taking alarm.

2, require 1 described detector according to power, it is characterized in that positive electricity crimping R resistance, normally closed switch ground connection in the described detection circuit, positive electricity crimping R ₂Resistance, triode b ₂-b ₁, R ₁To electric 0 point, T to 0 of positive electricity crimping controllable silicon and b ₁Point, positive electricity crimping R ₃Resistance, pilot lamp are to zero point, and positive voltage and zero point are drawn device taking alarm by optical cable.

3,, be that described thermal sensing element adopts memorial alloy (8MA) or bimetallic strip under it is special according to claim 1 or 2 described detectors.