CN2199567Y

CN2199567Y - Explosion-proof smoke sensor

Info

Publication number: CN2199567Y
Application number: CN 94216146
Authority: CN
Inventors: 赵禧林; 张富贵
Original assignee: ELECTRONIC EQUIPMENT FACTORY JIAOZUO MINING BUREAU
Current assignee: ELECTRONIC EQUIPMENT FACTORY JIAOZUO MINING BUREAU
Priority date: 1994-06-29
Filing date: 1994-06-29
Publication date: 1995-05-31
Anticipated expiration: 2004-06-29

Abstract

The utility model relates to an explosion-proof smoke sensor under coal mines, which is suitable for the places which need to prevent fire, such as the working faces of the mining under the coal mine, return airways, electromechanical chambers, belt transport alley ways, etc. The utility model is mainly composed of a terminal box, a casing, a circuit, an alarm device and a smoke sensing probe. The utility model has the advantages of simple structure, exact monitoring and reliable work, and the utility model can send out alarm signals and can adapt the adverse environment under the coal mine.

Description

Explosion-proof smoke sensor

The utility model is a kind of colliery down-hole fireproof sensing device, is applicable to getting working face under the coal mine, return airway, dynamo-electric chamber, belt transportation lane etc., needs the fireproof place.

Can cause fire failure for various reasons under the coal mine, but also not monitor preferably at present and give applying to install and put.Though the domestic part manufacturer production has been arranged smoke transducer and since technical assurance not the reliability of work, the effect of using under the coal mine is generally not ideal.

In order to prevent the generation of colliery mine fire accident, guarantee mine safety production and workman's life security, the purpose of this utility model be to provide a kind of simple in structure, monitoring accurately, reliable operation, can adapt to rugged surroundings under the coal mine, and can send the explosion-proof type smoke transducer of alerting signal.

The purpose of this utility model is achieved in that this sensor is made up of terminal box, shell, circuit, alarm appliance and sense cigarette probe.Into wire hole 4,10 is arranged on the terminal box 7, binding post 8 and terminal block 9 are arranged in the terminal box.Circuit 3 and alarm appliance 2 are contained in the shell 11.Sense cigarette probe 1 is contained in the hurricane globe 13.Terminal box 7, shell 11 connect and compose an integral body with hurricane globe 13 usefulness screws.Circuit 3 is made up of oscillatory circuit, booster circuit, warning circuit and output circuit four parts.Its structure is that power end G connects the control power supply, and and integrated circuit (IC) ₁4,8 pin connect, 1 pin ground connection, output terminal 3 pin are connected with booster circuit, again with feel pop one's head in 1 input end of cigarette and be connected, its output terminal is connected with alarm appliance, and is connected with output circuit, output terminal YW connects external control circuit.

Adopt the smoke transducer of said structure, simple in structure, highly sensitive, the life-span is long, cost is low, and is easy to use, safe and reliable, and monitoring promptly and accurately, rugged surroundings under the coal mine there is very strong adaptability, and can reports to the police, can reduce the generation of mine fire accident with it.

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is a general structure synoptic diagram of the present utility model

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

In the accompanying drawing: the 1st, sense cigarette probe, the 2nd, alarm appliance, the 3rd, circuit, 4, the 10th, advance wire hole, the 5th, drop handle, the 6th, set bolt, the 7th, terminal box, the 8th, binding post, the 9th, terminal block, the 11st, shell, the 12nd, cover plate, the 13rd, hurricane globe, the 14th, shell is connected the screw of usefulness with cover plate, the 15th, sealing gasket, the 16th, garden chapiter screw, the 17th, pilot lamp.

Shown in Fig. 1,2, the utility model by sense cigarette probe 1, alarm appliance 2, circuit 3, advance wire hole 4,10, drop handle 5, set bolt 6, terminal box 7, binding post 8, terminal block 9, shell 11, cover plate 12, hurricane globe 13, screw 14, sealing gasket 15, garden chapiter screw 16 and pilot lamp 17 and constitute.A set bolt 6 is arranged on the terminal box 7, and drop handle 5 is contained on the bolt 6.Binding post 8 is fixed on the terminal block 9, and terminal block 9 is fixed on the shell 11.There is into wire hole 4,10 at the two ends of terminal box 7, are used for the input of power supply and the output of signal.Alarm appliance 2 and circuit 3 all are contained in the shell 11, and shell 11 usefulness screws 14 are fixed on the cover plate 12.On the sense cigarette probe pilot lamp 17 is arranged, sense cigarette probe 1 is contained in the hurricane globe 13, uses garden chapiter screw 16 again, and hurricane globe is fixed on the cover plate 12, constitutes an integral body.Between terminal box 7, shell 11, cover plate 12 and the hurricane globe 13 sealing gasket 15 is arranged all, hurricane globe 13 can be dismantled according to request for utilization.

Circuit 3 is made up of oscillatory circuit, booster circuit, warning circuit and output circuit four parts.

Principle of work of the present utility model is as described below:

Because the power supply of sense cigarette probe 1 is 20-24V, and this control system power supply is 12V, so designed booster circuit, the 12V power supply is become 22V, uses for sense cigarette probe 1.

Booster circuit: by integrated circuit (IC) ₁Constitute with peripheral cell, it is a voltage doubling rectifing circuit.IC ₁And R ₂, C ₃Constitute oscillatory circuit, 3 pin are output terminals, and during 3 pin step-downs, G is through D ₂Give C with 3 pin with going into ₂Charging is approximately supply voltage, and when 3 pin uprised, G was through 3 pin and C ₂Voltage stack after, through D ₁Give C ₁Charging is approximately 2 times of supply voltages, uses for sense cigarette probe.IC ₁4,8 pin and 1 pin be power supply terminal, wherein R ₂, C ₃Be the oscillator external resistor and capacitor component, D ₅For C is established in the reversal connection of protection power supply ₆For the power supply decoupling is established.

Warning circuit: by integrated circuit (IC) ₂Constitute with peripheral cell.YD is an alarm appliance 2.

Output circuit: by relay J, triode T ₁And peripheral cell constitutes.T when static ₁End, the J dead electricity, normally closed some adhesive, the normal battle disconnects, and YW is output as high level.When smog was arranged, the equivalent impedance in the sense cigarette probe 1 changed, and electric current output is arranged under the power supply effect, and this electric current is through R ₅Make T ₁Conducting, output terminal becomes electronegative potential by noble potential, and J gets electric, and normally closed point is opened, the adhesive of often making war, output terminal YW becomes 0 by high level, warning circuit work simultaneously, alarm appliance 2 is that YD sends chimes of doom.R wherein ₃Be current-limiting resistance, R ₁Be biasing resistor, D ₆J establishes for protective relay.

During use, with smoke transducer, hang in the underworkings with drop handle 5.Smoke transducer obtains power supply from control box, IC ₁Produce vibration, oscillator signal is through D ₁, D ₂, C ₁, C ₂The booster circuit of forming becomes the 12V power supply into 22V and supplies with the use of sense cigarette probe.When smog was arranged, the pilot lamp 17 on the sense cigarette probe 1 glowed, and electric current output is arranged, and this electric current is through R ₅Make T ₁Conducting, the actuating of relay, output terminal YW becomes electronegative potential by noble potential, the work of control external circuit, T ₁After the conducting, signal is added to by IC ₂The warning circuit of forming, YD sends newspaper sound.

IC ₁Adopt the NE555 integrated circuit; IC ₂Adopt the CP40106 integrated circuit;

Sense cigarette probe is done moistureproof the processing through epoxy encapsulation, and rugged surroundings under the coal mine are had very strong adaptability.

Claims

1, a kind of explosion-proof type smoke transducer of forming by terminal box, shell, circuit, alarm appliance and sense cigarette probe, it is characterized in that: into wire hole (4,10) is arranged on the terminal box (7), binding post (8) and terminal block (9) are arranged in the terminal box, circuit (3), alarm appliance (2) is contained in the shell (11), sense cigarette probe (1) is contained in the hurricane globe (13), and terminal box (7), shell (11) connect and compose an integral body with hurricane globe (13) with screw; Circuit (3) is made up of oscillatory circuit, booster circuit, warning circuit and output circuit four parts, and its structure is: power end G connects the control power supply, and and IC ₁4,8 pin connect, 1 pin ground connection, output terminal 3 pin are connected with booster circuit, again with feel the pop one's head in input end of (1) of cigarette and be connected, its output terminal is connected with alarm appliance, and is connected with output circuit, output terminal YW connects external control circuit.

2, according to the described explosion-proof type smoke transducer of claim 1, it is characterized in that: sense cigarette probe (1) is to use epoxy encapsulation.

3, according to the described explosion-proof type smoke transducer of claim 1, it is characterized in that: drop handle (5) is arranged on the terminal box (7), fixing with bolt (6).