CN2086436U

CN2086436U - Automatic test alarm shutoff unit for burning gas

Info

Publication number: CN2086436U
Application number: CN 91201749
Authority: CN
Inventors: 段住顺
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-01-28
Filing date: 1991-01-28
Publication date: 1991-10-09

Abstract

The utility model relates to an automatic test alarm shutoff unit for burning gas which is composed of a gas sensor, an integrated circuit chip, a transistor, a resistor, a capacitance, operating coils, a gas valve, a spring power storing unit, and the automatic test alarm shutoff unit for burning gas can automatically test and can directly shut off various burning gases. The automatic test alarm shutoff unit for burning gas has the advantages of wide applicability, good explosion-proof performance, good fire proofing performance, stable working, broad application and low cost.

Description

Automatic test alarm shutoff unit for burning gas

The utility model relates generally to the automatic detection alarm of inflammable gas and blocks the device of source of the gas, the particularly device of the detection of coal gas and liquefied petroleum and blocking-up automatically.

The use of coal gas and liquefied gas has brought very big convenience to people, has also brought potential threat to people.Since the careless leakage of gas kitchen ranges, and the user does not in time find, the lighter causes poisoning, and weight person causes death or explodes, and therefore, develops the device that source of the gas was monitored and blocked to a cover effectively, will use coal gas and liquefied gas to bring safety to people.At present, several gas leakage alarms are arranged on the market, as TEC600 type (Shenzhen), SECM-888 type (Guangzhou), MA-II type (Jiaxing) all has only warning function to block source of the gas, because gas poisoning often occurs in the user when sleeping or old handicapped person, user in this case can not react alerting signal, thereby also just can not fundamentally prevent the generation of various accidents.

I am that " the automatic jet of electronics " utility model patent (having invested patent right October 31 nineteen ninety) of 89201646.9 provides one to be with automatic monitoring and to turn-off the device of gas source in the patent No. of on February 13rd, 1989 application, the purpose of this utility model is to provide multiple user to monitor the device that inflammable gas leaked and blocked automatically source of the gas automatically, makes various inflammable gas users can both use the monitoring occluding device easily.

The automatic detection alarm block device of inflammable gas described in the utility model is made of following part: gas sensor; The time-delay transmitter; Voltage comparator; Voltage amplifier; Delayed type intermittant voltage generator; Power output stage; Audible-visual annunciator; Block device; The power circuit part.

The automatic detection alarm block device of inflammable gas described in the utility model is provided with delayed type intermittant voltage generator, make block device be operated in complete no-spark state, thereby explosion-proof (anti-flaming) performance of this device is strengthened greatly, simultaneously because the function of time-delay can have been avoided the misoperation of block device effectively; Be provided with the delay transmission circuit, thereby avoided the false alarm phenomenon at energising initial stage; Hummer adopts batch (-type) to pipe, and makes that chimes of doom is easier to be discovered by the people; Green luminotron shows that this device has been in monitoring state, the hummer sounding represents that this device has been in the inflammable gas environment of setting concentration, red luminotron shows that having control signal sends, source of the gas is blocked, the various duties of this sample device are passed through the effect of acousto-optic significantly in addition with difference, make the user convenient.

Below in conjunction with accompanying drawing, the structure of the automatic detection alarm block device of inflammable gas described in the utility model is elaborated.

Fig. 1 is the block diagram of the automatic detection alarm block device of inflammable gas described in the utility model;

Fig. 2 is the circuit diagram of the automatic detection alarm block device of inflammable gas described in the utility model;

Fig. 3 is report to the police the automatically mechanical action synoptic diagram of block device transversal-push type block device of inflammable gas described in the utility model;

Fig. 4 is the mechanical action synoptic diagram of the automatic detection alarm device of inflammable gas described in the utility model direct press type block device.

Referring to Fig. 1. Fig. 1 is the block diagram of the automatic detection alarm block device of inflammable gas described in the utility model.The inflammable gas signal voltage that is subjected to by gas sensor is subjected to the control of 1 minute time-delay transmitter, and this signal voltage will be clamped on low level in energising 1 minute; This signal voltage just can be sent to voltage comparator after switching on 1 minute, in case this signal voltage is higher than the reference voltage by sensitivity adjusting output, voltage amplifier is with regard to output low level, cut-out is to the failure of oscillation voltage of delayed type intermittant voltage generator, make delayed type intermittant voltage generator produce time-delay and oscillator signal, promote power output stage and send the intermittant voltage signal, block device is worked off and on, send the sound and light alarm signal simultaneously.Civil power is supplied with the required voltage of the automatic detection alarm device of inflammable gas each several part circuit working behind the power transformer step-down rectifier.

Referring to Fig. 2. Fig. 2 is the circuit diagram of the automatic detection alarm block device of inflammable gas described in the utility model.After the gas sensor of being made up of gas sensor M1 and resistance R 1 is experienced inflammable gas, will output voltage signal, this signal is subjected to the control of the time-delay transmission circuit be made up of Ic1a, D1, C2, R5, in 1 minute of energized, the A point of Ic1a is in low level all the time, by the clamping action of D1, make the negative input B end of voltage comparator Ic1b also be in low level all the time, thereby make the voltage signal of sensor inoperative; When energized after 1 minute, the A point of Ic1a just is in high level always, D1 is in anti-state partially, can think approx that postponing transmission circuit disconnects, thereby the voltage signal of sensor can be compared at voltage comparator, when the signal voltage B of sensor end was higher than the C end of voltage comparator, D held with regard to output low level, otherwise just exports high level.Because when the gas sensor element is not experienced the inflammable gas of setting concentration value, D end is in high level, the effect by D3 all the time, C5 will be charged to high level very soon, the G end output low level of the delayed type intermittant voltage generator of being made up of Ic1d, R8, R9, R12, R13, R14, C4, C5, D5; When the D end is in low level, because the effect of C5, the E terminal voltage can not reduce at once, but discharge lentamente by R13, after about 15 seconds, the E terminal voltage is lower than the F end, the G end is exported high level immediately, this high level drives the BG2 saturation conduction immediately, promote relay J 1 adhesive, the output control signal is because R12, the existence of D5, and the resistance of R12 is far smaller than the resistance of R13, the high level of G end is very promptly drawn high the level of C5, when E end level was higher than the F end, G held and output low level, and the high level of C5 discharges slowly by R13 again, go round and begin again, the G end is in always intermittently exports high level state, also make J1 be in the discontinuous operation state,, make block device also be in the discontinuous operation state by the effect of J1-K.When the combustable gas concentration signal of gas sensor impression was lower than setting value, the D end went out high level immediately, and C5 is also filled with high level immediately, and the G point also is pulled to low level immediately, and the intermittant voltage generator quits work, and block device also quits work.Because the signal voltage that each sensor brings is all by time-delay 15 seconds, and voltage generator resets intermittence when signal voltage disappearance time delay that sensor is sent here.So this device detects owing to kitchen range cause gas leakage less than in the time of 15 seconds in igniting or other normal reason at every turn, block device can not produce the blocking-up action, have only when the gas leakage time during greater than 15 seconds block device just produce blocking-up and move.The green emitting display circuit indication time-delay transmitter working time of being made up of R4, D2 is mistake, and sensor has been in the Monitoring and Controlling state; Indicate this device to export control signal, block device work by the emitting red light display circuit that R20, D8, R21, D13 form.

Because gas sensor M1 has the process removing residual gas, can send the false alarm signal when energising just, so the time-delay transmission circuit of being made up of Ic1a, C2, R5, D1 of this device setting is exactly the generation for fear of this phenomenon, when the moment of circuit energized, the level of C2 is about 0V, the level of Ic1a negative input end is a certain value, the A end is low level, along with R5 constantly charges to C2, the level of C2 slowly rises, after 1 minute, the level of C2 just is higher than the level of Ic1a negative input end, and the A end is high level, D1 is anti-inclined to one side, and the time-delay transformation task is finished.

When the D end is low level, effect by D4, make the square-wave oscillator work of forming by Ic1c, R6, R7, R10, R11, C3, drive the hummer formed by BG1, BG3, D6, R17, R18, R19, M2 sounding off and on simultaneously, in time remind the user to take measures.

The 220V civil power supplies this device each several part circuit working after T1 step-down, D9～D12 rectification, C7 filtering.The voltage stabilizer of being made up of Ic2, C1 can offer M1 and voltage comparator with stable voltage, and this device can be worked normally.

Referring to Fig. 3. Fig. 3 is the mechanical action synoptic diagram of the automatic detection alarm block device of inflammable gas described in the utility model transversal-push type block device.Illustrating No. 1 parts is draft tube; No. 2 parts are escape pipes; No. 3 parts are the special-shaped rubber rings of sealing; No. 4 parts are " O " type rubber rings; No. 5 parts are energy storage back-moving springs; No. 6 parts are intermediates; No. 7 parts are location lock iron; No. 8 parts are electromagnetism pull-in windings; No. 9 parts are supports; No. 10 parts are extension springs; No. 11 parts are current-limiting resistances; No. 12 parts are shells; No. 13 parts are red luminotrons.The user must connect draft tube with sebific duct with source of the gas, with sebific duct with escape pipe and kitchen range with connecting, and promote escape pipe and be moved to the left about 9mm, make location lock iron pin escape pipe, the maintenance aeration status.Along with moving of escape pipe, to promote No. 4 parts simultaneously also is moved to the left, No. 5 parts are compressed energy storage, because the air intake opening of 4 φ 3mm of No. 2 parts left port is placed in the center cavity of No. 1 parts, 4 air intake openings of the gas of No. 1 parts by No. 2 ones are sent in streams to a place kitchen range and are used for the user, because the effect of No. 7 parts and No. 10 parts, will make the pinning that is positioned of No. 2 parts, as long as extraneous circumstance does not change, this block device just is in aeration status always.After S3 ', S4 ' receive control signal, No. 8 parts are just switched on and are produced magnetic field, inhale moving No. 7 parts, No. 2 parts are broken off relations, under the effect of No. 5 parts, No. 2 parts move right rapidly and reset, under the acting in conjunction of No. 4 parts, No. 3 parts, No. 5 parts, the air intake opening of No. 2 parts is sealed, and gas circuit is blocked.The control signal of S3 ', S4 ' also by the metering function of No. 11 parts, makes No. 13 parts luminous, and indication has control signal, has only when the control signal disappearance, just can restart the ventilation of this block device, otherwise block device will be closed again.The effect of No. 6 parts is to clamp No. 3 parts by the threaded engagement with No. 1 parts to make it the location, offers the guide way of a slip of No. 2 parts simultaneously.The effect of No. 9 parts is the functions to a location of No. 7 parts.No. 12 parts are to effect of supporting the location of all parts.

Owing to adopted No. 3 parts and No. 4 parts, when this block device is in blocking state, the pressure of air intake opening can act on No. 3 and No. 4 parts simultaneously, when making block device be in blocking state, the sealing property of this block device improves greatly, and its sealing property is corresponding the raising along with the raising of air intake opening pressure, thereby the reliability of this block device is strengthened.

Because the suction kinetic power of No. 8 parts is that design is at powerful state, its job requirement is only to allow to work at short notice, otherwise it is just may Yin Wendu too high and burn, because what S3 ', S4 ' received is the intermittant voltage signal, so can guarantee No. 8 parts fully can normally work for a long time, dwindle the physical dimension of this block device therefrom greatly, reduced cost, made things convenient for the user.

Because the control signal of S3 ', S4 ' directly feeds parts No. 8, not by any touch switch, thereby eliminated spark source, the performance of explosion-proof (anti-flaming) of this resistance shape device is strengthened greatly.

Referring to Fig. 4. Fig. 4 is the mechanical action synoptic diagram of the automatic detection alarm block device of inflammable gas described in the utility model direct press type block device.Illustrating No. 1 parts is air intake openings; No. 2 parts are gas outlets; No. 3 parts are buttons; No. 4 parts are the energy storage springs that reset; No. 5 parts are intermediates; No. 6 parts are push rods; No. 7 parts are gland nuts; No. 8 parts are to go up sealing rubber ring; No. 9 parts are bowl type sealing rubber rings; No. 10 parts are stage clips; No. 11 parts are location lock iron; No. 12 parts are pull-in windings; No. 13 parts are S3 ' input ends; No. 14 parts are S4 ' input ends.The user must be with corresponding connector with air intake opening when using this block device, and the gas outlet is fixed in the middle of source of the gas and the kitchen range, presses the work of can ventilating of No. 3 parts then.Because the effect of No. 11 parts, No. 10 parts is in No. 6 parts and opens the ventilation positioning states.After S3 ', S4 ' received control signal, No. 12 parts energisings produced magnetic field and inhale moving No. 11 parts, and under the effect of No. 4 parts, No. 6 parts move up, and under the acting in conjunction of No. 4, No. 5, No. 6, No. 10 parts, the source of the gas of No. 1 parts is blocked.The effect of No. 7 parts is to make No. 6 and No. 10 parts fluid-tight engagement.

Because what S3 ', S4 ' received is the intermittant voltage signal, so No. 12 parts can be made the form of small-sized high-power, thereby makes control action reliable, volume is very little.

Claims

1, the automatic detection alarm block device of a kind of inflammable gas, by gas sensor, time-delay transmitter, voltage comparator, voltage amplifier, delayed type intermittant voltage generator, block device and power supply are formed, the output terminal of the output terminal of gas sensor, the output terminal of voltage divider, time-delay transmitter is connected to two input ends of voltage comparator respectively, voltage comparator, voltage amplifier, delayed type intermittant voltage generator, block device are electrically connected successively, power supply is powered to each several part, it is characterized in that access delay transmitter between gas sensor and the voltage comparator; Insert the delayed type intermittant voltage generator and the power output stage that are used for sensor signal voltage time-delay and the work of driving block device between voltage amplifier and the block device; The transversal-push type block device is made up of the spacer 7 of energy storage back-moving spring 5, escape pipe 2, locking escape pipe 2, special-shaped rubber ring 3 and " 0 " type rubber ring 4 of sealing escape pipe 2, source of the gas is connected draft tube 1, energy storage back-moving spring 5 is connected with escape pipe, the electromagnetism pull-in winding has control signal when input to inhale moving location lock iron 7 at S3 ', S4 ' escape pipe 2 is broken off relations, escape pipe 2 sealing that resets; The direct press type block device is made up of the energy storage spring 4 that resets, integral solder formula air intake opening 1 gas outlet 2 intermediates 5, sealing rubber ring 9, the energy storage spring 4 that resets closely is connected with push rod 6, sealing rubber ring 9, pull-in winding 12 has control signal when input, pull-in winding energising to produce magnetic field at S3 ', S4 ' to inhale moving location lock iron 11 push rod 6 is broken off relations, and push rod 6 drives sealing rubber ring 9 air intake opening of intermediate 5 is sealed under the effect of the energy storage spring 5 that resets.

2, the automatic detection alarm block device of inflammable gas as claimed in claim 1, it is characterized in that inserting after the voltage amplifier delayed type intermittant voltage generator of being made up of integrated circuit, resistance, electric capacity, diode, this time-delay intermittant voltage generator is input to block device through power output stage with this control signal.

3, the automatic detection alarm block device of inflammable gas as claimed in claim 1, it is characterized in that inserting a delayed type intermittant voltage generator after the voltage amplifier, the signal that comes from the transmission of sensor, voltage comparator does not directly drive output stage but drives output stage again after time-delay a period of time, between time delay, as the blackout of sensor, then this delayed type intermittant voltage generator resets, and after this has the signal of sensor to transmit the driving output stage of then will delaying time again again.

4, the automatic detection alarm block device of inflammable gas as claimed in claim 1, the pull-in winding driving voltage that it is characterized in that block device is a batch (-type) pulse voltage, the average power of driving is very little, and the instantaneous power that drives is very big.

5, the automatic detection alarm block device of inflammable gas as claimed in claim 1 is characterized in that the instantaneous adhesive power of block device pull-in winding is very big, and its volume is but very little.

6, the automatic detection alarm block device of inflammable gas as claimed in claim 1, it is characterized in that inserting between signal of sensor voltage and the voltage comparator clamp formula time-delay transmitter, when power initiation, make signal of sensor voltage be clamped on low level and can not be transferred to voltage comparator in a period of time of beginning, signal of sensor voltage just can be transferred to voltage comparator after time-delay finishes.

7, inflammable gas as claimed in claim 1 is examined the warning block device automatically, it is characterized in that the transversal-push type block device is to be socketed on the escape pipe of garden type by a kind of special special-shaped rubber ring, block device is in ventilation and blocking-up process, this special-shaped rubber ring relatively moves on escape pipe and reaches the function of ventilation and blocking-up, and when block device is in blocking state, its seal degree is also increased along with rising, the bleed pressure of bleed pressure also acts on this abnormal shape rubber simultaneously.

8, the automatic detection alarm block device of inflammable gas as claimed in claim 1, air intake opening, gas outlet, the intermediate that it is characterized in that the direct press type block device is directly to be welded into one with metal cast Cylinder, air intake opening is in outer cast Cylinder space, the gas outlet is in internal layer cast Cylinder space, and the blocking-up source of the gas is that the action of leaning on bowl type rubber ring to seal internal layer cast Cylinder achieves the goal.

9, the automatic detection alarm block device of inflammable gas as claimed in claim 1 is characterized in that it is that outer power is down pressed button, gives the energy storage spring energy storage that resets bowl type rubber ring when button is backed down by push rod that the direct press type block device will make it be in aeration status.

10, the automatic detection alarm block device of inflammable gas as claimed in claim 1, the air intake opening, the gas outlet that it is characterized in that the direct press type block device all are on the same axis, ventilate and block in the process of action at the direct press type block device and between air intake opening, the gas outlet any displacement does not take place.