CN2488120Y

CN2488120Y - Domestic gas leakage protector

Info

Publication number: CN2488120Y
Application number: CN 01214819
Authority: CN
Inventors: 叶玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-01-04
Filing date: 2001-01-04
Publication date: 2002-04-24
Anticipated expiration: 2011-01-04

Abstract

The domestic gas leakage protector is composed of detection circuit G, signal processing circuit X, delay circuit Y, alarm circuit B and execution circuit Z, in which the signal processing circuit is composed of three phase inverters A₁、A₂、A₃The triode of the execution circuit is connected with a solenoid valve maintaining ring L₁Starting coil L₂And a starting switch K₁The gas valve is connected in series, gas leakage and overtemperature are automatically detected, an alarm is automatically given and the gas valve is closed, the circuit structure is simple, the working reliability is high, the safety of gas use is improved, and accidents are prevented.

Description

The household gas leakage protector

The utility model relates to a kind of protective device that prevents gas leakage, particularly a kind ofly monitors the household gas leakage protector that gas leakage, overtemperature close gas and warning automatically.

At present, the gas leakage protector is not also used, and has only additional deflation warning system on some equipment, detects when gas concentration reaches certain value in the air, reports to the police automatically.The universal use of coal gas has brought convenience to people, also brings certain secret worry simultaneously, and its leakage can cause fire, blast, causes casualties and economic loss.In order to solve this difficult problem, people have proposed a lot of solutions, and the patented claim of a lot of this respects is also arranged, but all because of its control circuit and topworks are complicated can't application implementation.

The purpose of this utility model is for the shortcoming that overcomes above-mentioned prior art provides a kind of household gas leakage automatic protector, realizes gas leakage, overtemperature alarm and pass gas with simple circuit and topworks, and the accident of stopping takes place.

The purpose of this utility model can realize by following technical measures: this protector has testing circuit, and testing circuit is connected resistance by gas sensor with thermal sensing element and forms, and the dividing point that gas sensor and thermal sensing element and resistance connect to form is the signal output point; Signal processing circuit is in series by three phase inverters; Delay circuit is made up of phase inverter and capacitor, diode and resistance, and delay circuit connects first inverter output of signal processing circuit; Warning circuit is formed oscillatory circuit by two phase inverters and resistance, capacitor, connects loudspeaker through triode, and warning circuit connects second inverter output of signal processing circuit; The executive circuit solenoid valve is provided with actuating coil and keeps coil, and actuating coil is connected with starting switch, keeps coil and connects triode, and the base stage of triode connects the 3rd inverter output of signal processing circuit.When the gas sensor of testing circuit or thermal sensing element were in the normal state, the signal output point was an electronegative potential, and warning circuit is not worked, and the transistor base of executive circuit is a noble potential, be in conducting state, connect solenoid valve, solenoid valve is normally opened source of the gas, otherwise, then report to the police, and close gas check valve.

Concrete structure of the present utility model and embodiment are provided by the following drawings:

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

Fig. 2 is a circuit diagram of the present utility model.

The utility model is described in further detail below with reference to accompanying drawing: with reference to Fig. 1, Fig. 2, and the gas sensor S of testing circuit G, thermal sensing element R _tConnect resistance R _p, signal processing circuit X is by three phase inverter A ₁, A ₂, A ₃Serial connection forms, A ₁Input end connecting resistance R _p, the phase inverter A of delay circuit Y ₄Input end and resistance R ₂, diode D ₂, capacitor C ₂Connect A ₄Output terminal is through diode D ₄Connect phase inverter A ₁Output terminal, light emitting diode D ₁With resistance R ₃Series connection, the phase inverter A of warning circuit B ₅, A ₆With resistance R ₆, R ₇, capacitor C ₃Form oscillatory circuit, through triode T ₂Connect loudspeaker r, oscillatory circuit is through diode D ₅Connect phase inverter A ₂Output terminal, the solenoid valve of executive circuit Z has actuating coil L ₂With keep coil L ₁, actuating coil L ₂With starting switch K ₁Coil L is kept in series connection ₁Meet triode T ₁Collector, triode T ₁Base stage connects phase inverter A ₃Output terminal, light emitting diode and resistance R ₄The series connection display working condition.Connect protector under the normal condition, delay circuit is delayed time to A ₂Noble potential leaves valve by starting switch and normally uses, and detects gas leakage or when overheated, A ₁Input end is an electronegative potential, A ₂Output terminal is a noble potential, the warning of warning circuit, A ₃Output terminal is a low circuit, T ₁End L ₁Dead electricity, solenoid valve closes valve.Because solenoid valve is wanted L ₂Connect and to start, so after protector was closed solenoid valve, manually the ability repeated priming guaranteed safety.

Of the present utility model simple in structure, reasonable in design, monitoring of environmental gas concentration and temperature are reported to the police and the automatic gas check valve that closes automatically automatically, and circuit is simple, and the reliability height improves the security that combustion gas is used, and stops the gas leakage accident and takes place.

Claims

1. a household gas leakage protector has testing circuit G, signal processing circuit X, delay circuit Y, warning circuit B, executive circuit Z, it is characterized in that signal processing circuit is by three phase inverter A ₁, A ₂, A ₃Be in series, delay circuit connects phase inverter A ₁Output terminal, warning circuit connects phase inverter A ₂Output terminal, the solenoid valve of executive circuit is provided with actuating coil L ₂Enclose L with keeping ₁, actuating coil L ₂With starting switch K ₁Coil L is kept in series connection ₁Connect triode T ₁, T ₁Base stage connect the output terminal of phase inverter A3.