CN2219410Y

CN2219410Y - Automatic closing device for fuel gas leakage

Info

Publication number: CN2219410Y
Application number: CN 94244075
Authority: CN
Inventors: 姚志容
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-10-24
Filing date: 1994-10-24
Publication date: 1996-02-07
Anticipated expiration: 2004-10-24

Abstract

The utility model discloses an automatic closing device for fuel gas leakage, relating to a fuel gas safety device. The utility model is composed of an electronic monitoring part and a mechanical mechanism part, wherein, the electronic monitoring part is mainly composed of a gas sensor and a comparing amplifier, and circuits automatically control the operation of the mechanical mechanism. The mechanical mechanism is composed of a transmission mechanism, a pulling device, and a mechanical hand, wherein, the transmission mechanism mainly uses a miniature motor to drive a center clutch to drive the pulling device, the pulling arm main shaft of the pulling device is provided with a pulling arm, and a ratchet is arranged beside the pulling arm, and the pulling arm can control the rotating shift of the ratchet; the driving shaft of the mechanical hand is provided with a torsion spring, the bottom end is provided with the mechanical hand jaw, the top end is provided with a ratchet wheel, the ratchet wheel is clamped by the ratchet, and the mechanical hand jaw can closed the fuel gas valve through the return force of the torsion spring.

Description

The gas leakage safety shutoff

The utility model relates to a kind of combustion gas safty device, particularly a kind of gas leakage safety shutoff.

Along with improving constantly of people's lives, increasing family uses combustion gas (liquefied petroleum gas (LPG), piped gas, rock gas etc.), and is convenient and healthy.But danger also lies dormant simultaneously.Combustion gas is poisonous, flammable explosive gas, because liquefaction utensil and rubber tube are aging, the boiling slime flux extinguishes fire, the people forgets that all there is the danger of leaking gas in situation such as throttle down, and gas accidents happens occasionally, and is threatening people's the security of the lives and property.

Task of the present utility model provides a kind of combustion gas safety shutoff, utilizes electronic circuit to start the manual work of machinery, reaches the purpose of automatic self-closing gas valve.

The gas leakage safety shutoff includes electronic monitoring and mechanical mechanism two large divisions.Electronic monitoring mainly is made up of gas sensing member, comparison amplifier circuit, warning circuit, direct current output driving circuit etc.Mechanical mechanism by driving mechanism, stir device and mechanism hand constitutes.Driving mechanism is driven by micromachine, if centrifugal clutch is used for driving and stirs device in going into, be provided with on the arm main shaft and pull out arm stirring pulling out of device, pull out the arm side and be provided with ratchet, pull out the rotational displacement of arm control ratchet, the driving shaft of mechanism hand is provided with torque spring, the driving shaft bottom is a mechanical paw, the top is a ratchet, blocks ratchet by ratchet, and mechanical paw rotates by the power of returning of torque spring and closes gas valve.

Below by embodiment and accompanying drawing the utility model is further described.

Fig. 1 is an electronic monitor panel schematic representation

Fig. 2 is the electronic monitor skeleton diagram

Fig. 3 is the skeleton diagram of mechanical part

Fig. 4 is the axial schematic representation of mechanical part

Fig. 5 is mechanical part ratchet, ratchet, pull out radially schematic representation of arm

Fig. 6 is mechanical part mechanical paw and driving shaft connection diagram

Fig. 7 is loaded on the schematic representation of liquified petroleum gas cylinder for the utility model

Fig. 8 is loaded on the schematic representation of gas pipe line for the utility model

Among the figure: 1, gas sensing member 16, vent systems 31, pull out arm main shaft 2, tutorial light 17, micro motor 32, pull out arm 3, loudspeaker 18, gear 33, arm 4 is pulled out in test, ventilating fan combined socket and switch 19, automatic clutch 34, ratchet 5, mechanical mechanism controls lead socket 20, arm 35 is pulled out in driving, torsion spring 6, rectifier power source service line 21, click 36, ratchet 7, power supply 22, torsion spring drives main shaft 37, driving shaft 8, amplify 23, mechanical paw 38, torque spring 9, benchmark 24, finish and close gas valve 39, bearing 10, compare 25, driving wheel 40, location sieve silk 11, drive 26, driven wheel 41, gas cylinder air valve 12, direct current is exported 27 wheel shafts 42, securing bracket 13, relay 28, middle centrifugal clutch 43, mechanical controller structure 14, sound alarm 29, spring 44, securing bracket 15, mechanical mechanism 30, pull out arm wheel 45, the pipeline air valve

The governor circuit of electronic monitoring adopts with calculating amplifier circuit.By gas sensing member 1 output signal, through comparing amplification circuit 8～10.During proper functioning, green indicating lamp is bright, when containing methane gas concentration in the air and reach 3%, deliver to mechanical mechanism 15 drive motor 17, a road by comparison amplification circuit driving direct current output 12, one road and deliver to relay 13 driving vent systems 16, one the road delivers to sound alarm 14, to loudspeaker 3.

Mechanical mechanism comprises driving mechanism, stirs device and mechanism hand, driving mechanism is made of micromachine 17, driving wheel 25, driven wheel 26, wheel shaft 27 and middle centrifugal clutch 28, be used for driving and stir device, (also can adopt other forms of mechanism to drive and stir device).Stir device by pulling out arm wheel 30, pull out arm main shaft 31, pulling out arm 32 and ratchet 34 constitutes, be used to control the disengagement of mechanism hand.Mechanism hand is made of ratchet 36, driving shaft 37, torque spring 38 and mechanical paw 23, is used to close gas valve, is provided with test arm 33 on arm main shaft 31 tops of pulling out of stirring device, is used to verify whether driving mechanism resets.At the driving shaft 37 of mechanism hand and the joint driving shaft 37 of mechanical paw 23 is nullisomic, fixing by sieve silk 40 between driving shaft 37 and the mechanical paw 23, make mechanical paw 23 can about revolution reach 120 ° so that can normally open or close gas valve.

During use, tighten torque spring 38, ratchet 36 is blocked by ratchet 34, driving shaft 37 is motionless, mechanism hand can 120 ° of left-right rotation, the gas valve switch is freely.When containing methane gas concentration in the air and reach 3%, the signal of gas sensing member output is through amplifying, send reference circuit relatively, the output of driving direct current, export to mechanical mechanism 15 on the one hand and drive 3V direct current generator 17, drive driven wheel 26 and wheel shaft 27 by driving wheel 25, centrifugal clutch 28 rotations during wheel shaft 27 drives, when rotating speed reaches certain revolution, clutch gear on the middle centrifugal clutch 28 is under action of centrifugal force, overcome the pressure of spring 29 and pull out 30 for the engagements of arm wheel, drive is pulled out arm and is taken turns 30 rotations, pulls out the arm wheel as pulls out arm 32 rotations by pulling out 31 for the drives of arm main shaft, stir ratchet 34 and break away from ratchet 36, driving shaft 37 drives mechanical paw 23 and turns round in the direction of the clock, with gas lockout valve under the effect of torque spring 38.Direct-current control voltage is exported to relay 13 on the other hand to vent systems 16, exports to sound alarm 14 to loudspeaker 13.

The utility model adopts centrifugal clutch in the minitype motor driving, drives striking gear and breaks away from mechanism hand, and the torque spring drive mechanical paw revolution by mechanism hand reaches the purpose of closing gas valve.Have characteristics safe and reliable, easy to use, and can start ventilating fan simultaneously, send alarm signal simultaneously.

Claims

1, a kind of gas leakage safety shutoff, comprise electronic monitoring and mechanical mechanism two large divisions, electronic monitoring is mainly by gas sensing member, compare amplification circuit, warning circuit, compositions such as direct current output driving circuit, mechanical mechanism is by driving mechanism, striking gear and mechanism's hand constitute, driving mechanism is driven by micromachine, if go into middle centrifugal clutch, be used for driving and stir device, it is characterized in that being provided with on the arm main shaft and pull out arm pulling out of striking gear, pull out the other ratchet that is provided with of arm, pull out the rotational displacement of arm control ratchet, the driving shaft of mechanism hand is provided with torque spring, and the driving shaft bottom is a mechanical paw, the top is a ratchet, blocks ratchet by ratchet.

2, gas leakage safety shutoff according to claim 1, the arm main shaft that pulls out that it is characterized in that stirring device is provided with and pulls out the arm wheel, drives and pulls out the arm main shaft.

3, gas leakage safety shutoff according to claim 1 is characterized in that pulling out arm main shaft top and is provided with test and pulls out arm.

4, gas leakage safety shutoff according to claim 1 is characterized in that in the joint of the driving shaft and the mechanical paw of mechanism hand, driving shaft is a nullisomic, between fix by sieve silk, mechanical paw can about the revolution reach 120 °.