CN207115102U - LNG points are for pulse period control plus smelly circuit - Google Patents
LNG points are for pulse period control plus smelly circuit Download PDFInfo
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- CN207115102U CN207115102U CN201720931679.5U CN201720931679U CN207115102U CN 207115102 U CN207115102 U CN 207115102U CN 201720931679 U CN201720931679 U CN 201720931679U CN 207115102 U CN207115102 U CN 207115102U
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Abstract
LNG points, which for pulse period control plus smelly circuit belong to coal and change gas engineering LNG points, supply small gas flow device for adding odor technical field, more particularly to a kind of LNG points add smelly circuit for pulse period control.The utility model provides a kind of plus smelly continuous, accurate, safety LNG points for pulse period control plus smelly circuit.The utility model includes CPU, EEPROM, RS485 part, Power convert part, usb segment, clock circuit, detection signal pulse input part, check valve drive control part plus smelly pump drive control part, key part and LCDs, the signal transmission port with EEPROM, the signal transmission port of RS485 parts, the signal transmission port of usb segment, the signal transmission port of clock circuit are connected CPU signal transmission port respectively, and CPU detection signal input port is connected with the detection signal output port of detection signal pulse input part.
Description
Technical field
The utility model, which belongs to coal and changes gas engineering LNG points, supplies small gas flow device for adding odor technical field, more particularly to
A kind of LNG points are for pulse period control plus smelly circuit.
Background technology
Substitute coal-fired engineering project using natural gas clean energy resource, be that the Chinese government is to reduce CO2 emission, improve
One fundamental state policy of air quality, people's living standard of preserving the ecological environment, improve, by the coal-fired life style in vast rural area
It is promoted to combustion gas life style.As the civilian-oriented project and blue sky environment-friendly engineering of government, LNG points for equipment it is all it is low into
The safe and reliable outfit requirement of this high-performance.Natural gas is very environmentally friendly after being used as clean energy resource, conveniently, but natural gas is easy
Explosion hazard gases is fired, once leak, it is likely that fire or explosion accident can be triggered, there must be enough safety using natural gas
Safeguard.Odorant of fuel gases is added into the natural gas of colorless and odorless, makes combustion gas that there is enough spies very easily identified
Different smell, it is one of commonly used safe way measure in the current world.Odorant of fuel gases smell is very special, in the dense of very little
Degree just has very strong penetrating odor, and should not disappear, and is a kind of warning agent of combustion gas smell well.Odorant of fuel gases is in itself
It is chemicals, majority is toxic liquid, and its gas has inflammable and explosive property, equally there is certain danger and harmfulness with combustion gas.
Most odorant of fuel gases chemical property are sufficiently stable, are not easy natural decomposition, be not easy to other material chemical combination, be that there is very big danger
The material of evil property and potential safety hazard.In addition odorant also there is very strong adsorptivity to conciliate adsorptivity, adsorption and desorption speed
Because material difference is widely different, the gas that can all distribute odorant on other objects for a long time is easily absorbing after leakage
Taste.The addition deficiency of odorant can not play safe warning function in combustion gas, and the addition of odorant is excessive in combustion gas,
Imperfect combustion can be then caused, triggers other unnecessary supply accidents.GB50028《Code for design of city gas engineering》3.2.3
Bar clear stipulaties, the smell of odorant should be able to be smelt when nontoxic gas leakage reaches 20% concentration of LEL into air,
The odour intensity of odorant is 2 grades of warning intensity, and by taking thiophane odorant as an example, the odorizing amount of unit combustion gas should add
20mg.The effect of apparatus for making gas ordorous is exactly that odorant is added into combustion gas, makes the combustion gas of gas pipeline have unique mark
Property smell, combustion gas occurring just leaked also people to be produced to injure to be also impossible to the when marquis exploded, be just easy to by
People discovers, timely processing leakage alarm or escape, effectively avoids the poisoning and explosion accident triggered by gas leakage, ensures peace
Full supply.
Because the odorant content needed in combustion gas is very small, in milligram level, for existing apparatus for making gas ordorous
For, in the sufficiently large (500m of gas flow3/ more than h) when, odorant amount needed for accumulation all 500 × 20=10000mg with
On, required more than the ÷ 60=166.67mg of odorant amount 10000 per minute, calculate, add smelly by single output quantity 150mg-50mg
The pump basic guarantee output frequency per minute that can have 1-3 times, basic guarantee returns leakage phenomenon without odorant, and is easier to realize
Odorizing agent concentration is uniform, and addition is substantially accurate.In gas flow very little, less than 500m3During/h, existing apparatus for making gas ordorous
It can not meet accurately plus smelly demand, generally use excessively add smelly method processing, also have individual cases odorizing amount deficiency, combustion occur
Add smelly discontinuous, generation supply potential safety hazard when throughput is very low.
The operation principle of existing apparatus for making gas ordorous is so：Smelly controller is added to receive the analog current of gas meter
Flow signal, control plus smelly pump count odorant by the odorizing amount of setting.Smelly pump is added to be converted into continuous gas flow signal
The reciprocating motion number of plunger, it is a discrete output procedure, by adding the transmission of smelly pipeline to tend to continuous flowing injection
In gas pipeline.Add the output end of smelly pump that check valve is set, control odorant liquid one-way flowing, check valve should not have in theory
Any time leakage quantity, actually influenceed by dust in machining accuracy, pipeline and odorant endoparticle impurity, check valve is that have
Leakage quantity is returned, check valve returns leakage quantity very little in high frequency motion, almost do not shown not come out, and when check valve low frequency movement, returns
Time leakage quantity that leakage quantity can be accumulated with time span, which can become increasing, too low motion frequency, necessarily causes check valve to stop fortune
The dynamic time is very long, and output quantity can be can exceed that by returning leakage quantity.At present plus smelly pump check valve dwell time scope was at 30 minutes to 90 minutes
Left and right, stable minimum single output quantity 50mg during 50 beats/min of working frequency, by national regulations 20mg/m3Standard of odorizing can
For 2.5m3Natural gas odorization.As gas flow 500m3During/h, working frequency is 3.33 times, if gas flow as little as 50m3/h
When, only 0.333 time per minute of working frequency, i.e., action in 3 minutes is once.If gas flow as little as 5m3During/h, working frequency
Only 0.0333 beat/min per minute, i.e., once, combustion gas recharge phenomenon is possible to occur, that is to say, that this is for action in 30 minutes
If a critical point gas flow is less than 5m for a long time3/ h, combustion gas recharge will occur.
When adding smelly equipment actual motion, gas flow can constantly change, LNG points for station in some cases 1 day also only
With tens side's combustion gas, many situations use when concentrating on three meals of Morning Afternoon Evening with gas, other times gas flow very little, or even several
Just there is 1m hour3Gas flow is by the way that gas flowmeter in this case, is merely capable of exporting 3.96mA~4.04mA or so
Analog current signal, substantially belong to null offset phenomenon, conventional controller receive as signal value will not export and accurately have
Effect adds smelly pump action signal, adds the smelly pump time out of service can be very long, for up to by 10 to 12 hours, under this operating condition
The combustion gas flowed through is just without addition odorant.
On the other hand add smelly device interior add smelly pump do not move for a long time check valve return leakage quantity can obvious, stay in add
Odorant in smelly equipment installation can return a part by combustion gas top, it is also possible to be pushed to return to and add at smelly pump, most serious, which is pushed to return to, to be added
In smelly dose of storage tank, the mixed gas of combustion gas and odorant is arranged from storage tank pressure relief opening.This thing happens pollutes surrounding enviroment,
Potential safety hazard be present, when adding smelly equipment movement output again, combustion gas has been completely filled with inside smelly pump due to adding, without liquid
Body odorant, add smelly pump operation frequency is high again can not export odorant.
The content of the invention
The utility model is aiming above mentioned problem, there is provided when a kind of plus smelly continuous, accurate, safety LNG points supply pulse
Section control plus smelly circuit.
To achieve the above object, the utility model adopts the following technical scheme that, the utility model include CPU, EEPROM,
RS485 parts, Power convert part, usb segment, clock circuit, detection signal pulse input part, check valve driving control
System part, plus smelly pump drive control part, key part and LCDs, CPU signal transmission port respectively with EEPROM
Signal transmission port, the signal transmission port of RS485 parts, the signal transmission port of usb segment, the letter of clock circuit
Number transmission port is connected, CPU detection signal input port and the detection signal output port of detection signal pulse input part
It is connected, the detection signal input port of detection signal pulse input part and the detection signal pulse output end mouth of gas meter
It is connected；
CPU operational factor sets input port to be connected with key part；
The CPU control signal output mouth control signal input mouth with check valve drive control part, plus smelly respectively
The control signal input mouth of pump drive control part is connected, the control signal output mouth difference of check valve drive control part
The control signal input mouth of control signal input mouth, upper check valve with lower check valve is connected, and adds smelly pump drive control part
The control signal output mouth divided is with adding the control signal input mouth of smelly pump to be connected；
CPU power port is connected with the output port of power source of Power convert part；
The CPU uses STC12C5A60S2 chips U1；
The detection signal pulse input part connects 24V power supplys using TPL521 optocouplers U2, U2 1 pin, and U2 2 pin pass through
Resistance R6 connects the detection signal pulse output end mouth of gas meter, U2 3 pin ground connection, and U2 4 pin connect U1 12 pin；
Described plus smelly pump drive control part connects 5V power supplys using TPL521 optocouplers U3, U3 1 pin, and U3 2 pin were connected
Resistance R7 connects U1 34 pin, and U3 4 pin, 3 pin connect the control signal input mouth for adding smelly pump；
1 pin of the RS485 part including MAX485E chips U5, U5 is connected with U1 10 pin, U5 2 pin respectively with U5
3 pin, U1 14 pin be connected, U5 4 pin are connected with U1 11 pin, U5 5 pin ground connection, U5 6 pin respectively with resistance R14 mono-
End, coffret J7 A mouths are connected, and the B mouths with coffret J7, U5 7 pin are connected the resistance R14 other ends respectively, U5 8 pin
Connect 5V power supplys；
1 pin of the Power convert part including LM2596 chip U9 and LM1117 chips U10, U9 respectively with diode
D12 negative electrodes, 12V power ends, electric capacity C44 positive poles, electric capacity C46 one end are connected, and diode D12 anodes connect switched power output,
Switching Power Supply input termination civil power；Electric capacity C44 negative poles, the electric capacity C46 other ends, U9 5 pin, U9 3 pin ground connection, U9 2 pin point
It is not connected with Schottky diode D13 negative electrodes, inductance L5 one end, Schottky diode D13 plus earths, the inductance L5 other ends point
3 pin not with electric capacity C50 positive poles, U9 4 pin, 5V power ends, electric capacity C52 one end, U10 are connected, electric capacity C50 negative poles, electric capacity C52
The 1 pin ground connection of the other end, U10；U10 2 pin are connected with electric capacity C53 one end, inductance L6 one end respectively, another terminations of electric capacity C53
Ground, the inductance L6 other ends are connected with 3.3V power ends, electric capacity C55 one end, resistance R46 one end respectively, another terminations of electric capacity C55
Ground, the resistance R46 other ends are grounded by LED D14.
As another preferred scheme, check valve drive control part described in the utility model include TPL521 optocouplers U7 and
TPL521 optocouplers U13, U7 1 pin connect 3.3V power supplys by resistance R40, U7 2 pin respectively with resistance R41 one end, electric capacity C35 mono-
End, U1 21 pin are connected, electric capacity C35 other ends ground connection, the resistance R41 other ends 3 pin with U7, resistance R43 one end, resistance respectively
R42 one end is connected, and U7 4 pin are connected with P-12V ends, the resistance R43 other ends respectively with electric capacity C39 one end, NPN triode Q2 bases
Extremely it is connected, the electric capacity C39 other ends are connected with the resistance R42 other ends, NPN triode Q2 emitter stages, ground wire respectively, NPN triode
Control signal input mouth of the Q2 colelctor electrodes respectively with resistance R44 one end, lower check valve is connected, and the resistance R44 other ends pass through LED
Lamp D9 connects P-12V ends；
U13 1 pin connects 3.3V power supplys by resistance R74, U13 2 pin respectively with resistance R77 one end, electric capacity C79 one end,
U1 22 pin are connected, electric capacity C79 other ends ground connection, the resistance R77 other ends 3 pin with U13, resistance R83 one end, resistance respectively
R80 one end is connected, and U13 4 pin are connected with P-12V ends, the resistance R83 other ends respectively with electric capacity C81 one end, NPN triode Q3
Base stage is connected, and the electric capacity C81 other ends are connected with the resistance R80 other ends, NPN triode Q3 emitter stages, ground wire respectively, the poles of NPN tri-
Control signal input mouth of the pipe Q3 colelctor electrodes respectively with resistance R86 one end, upper check valve is connected, and the resistance R86 other ends pass through
LED 15 connects P-12V ends.
As another preferred scheme, EEPROM described in the utility model includes 24C02 chips, 24C02 chips 1,2,
3rd, 4 pin are grounded, and 5 pin of 24C02 chips are connected with resistance R2 one end, cpu signal transmission port respectively, and 6 pin of 24C02 chips lead to
To cross resistance R1 and connect 3.3V power supplys, the resistance R2 other ends are connected with 3.3V power supplys, 8 pin of 24C02 chips, electric capacity C1 one end respectively,
The electric capacity C1 other ends are grounded.
As another preferred scheme, usb segment described in the utility model includes HEADER 14X2USB chips,
2 pin of USB chips connect 3V3 power supplys by 0.47 μ F electric capacity, and 5 pin of USB chips connect U1 3 pin, 6 pin of USB chips respectively with
U1 4 pin, 3V3 power supplys is connected, and 11 pin of 9 pin of USB chips respectively with 10nF electric capacity one end, USB chips are connected, 10nF electric capacity
The other end is grounded；13 pin of USB chips are connected with 12M crystal oscillators one end, the first 22pF electric capacity one end respectively, and the first 22pF electric capacity is another
One end is grounded, and 14 pin of the 12M crystal oscillators other end respectively with the 2nd 22pF electric capacity one end, USB chips are connected, and the 2nd 22pF electric capacity is another
One end is grounded, and 24 pin of USB chips pass sequentially through reverse light emitting diode, 1K resistance connects 3V3 power supplys.
As another preferred scheme, 2,3 pin that clock circuit described in the utility model includes 1302 chip U4, U4 connect
32K768 crystal oscillators both ends, 38 pin of U4 5 pin respectively with resistance R12 one end, U1 are connected, another termination 5V power supplys of resistance R12, U4
37 pin of 6 pin respectively with resistance R11 one end, U1 be connected, another termination 5V power supplys of resistance R11, U4 7 pin respectively with resistance
R10 one end, U1 36 pin are connected, another termination 5V power supplys of resistance R10；U4 8 pin connect battery.
As another preferred scheme, key part described in the utility model include KEYLEFT buttons, KEYUP buttons,
KEYDOWN buttons, KEYSET buttons, KEYRIGHT buttons and KEYCHANGE buttons, the tie point of KEYLEFT buttons one respectively with
Resistance R2 one end, U1 2 pin are connected, another tie point ground connection of KEYLEFT buttons；
5 pin of the tie point of KEYUP buttons one respectively with resistance R3 one end, U1 are connected, and another tie point of KEYUP buttons connects
Ground；
7 pin of the tie point of KEYDOWN buttons one respectively with resistance R4 one end, U1 are connected, another tie point of KEYDOWN buttons
Ground connection；6 pin of the tie point of KEYSET buttons one respectively with resistance R5 one end, U1 are connected, another tie point ground connection of KEYSET buttons；
8 pin of the tie point of KEYRIGHT buttons one respectively with resistance R1 one end, U1 are connected, another connection of KEYRIGHT buttons
Point ground connection；1 pin of the tie point of KEYCHANGE buttons one respectively with resistance R2 one end, U1 is connected, another company of KEYCHANGE buttons
Contact is grounded；
The resistance R2 other ends, the resistance R3 other ends, the resistance R4 other ends, the resistance R5 other ends, the other end of resistance 1, resistance
The R2 other ends are connected.
As another preferred scheme, the control signal input mouth and upper check valve of lower check valve described in the utility model
Control signal input mouth use solid-state relay.
As another preferred scheme, U1 described in the utility model 23 pin 2 pin, the electric capacity with 521 optocoupler U19 respectively
C102 one end is connected, and 3 pin of the electric capacity C102 other ends respectively with ground wire, U19 are connected, and U19 1 pin meets 3.3V by resistance R121
Power supply, U19 4 pin are connected with electric capacity C104 one end, PNP triode Q6 base stages respectively by resistance R125, and electric capacity C104 is another
End be connected respectively with ground wire, PNP triode Q6 colelctor electrodes, PNP triode Q6 emitter stages respectively with diode D18 anodes, relay
Device K5 control terminals one end is connected, diode D18 negative electrodes respectively with the relay K5 control terminals other end, POWER power ends, relay
K5 controlled switch fixing ends are connected, and relay K5 controlled switch first stirs termination P-12V ends, relay K5 controlled switch second
Struck side take over control non-return filling magnetic valve control terminal, prevent recharge magnetic valve be arranged on check valve with plus smelly pipeline it
Between.
Can be equipped with prevents the magnetic valve of recharge, CPU monitorings plus smelly pump action feedback loop output signal break time, in setting
Interior not have output signal, relay K5 can control closed electromagnetic valve, prevent combustion gas recharge from occurring.When output signal transmits again
When magnetic valve open immediately, continue to output odorant.
As another preferred scheme, U1 described in the utility model 39 pin pass through resistance R9 and PNP triode Q2 base
Extremely it is connected, PNP triode Q2 emitter stage connects 5V power supplys, and PNP triode Q2 colelctor electrode connects buzzer positive pole, buzzer negative pole
Ground connection.
Secondly, LCDs described in the utility model uses OCMJ4X8C LCD MODULEs.
In addition, the utility model also includes RS232 parts, RS232 parts include MAX3232C chips, MAX3232C chips
10,11 pin of 12,11 pin respectively with U1 be connected, 16 pin of MAX3232C chips respectively with 3.3V power supplys, electric capacity C3 one end, electricity
Hold C2 one end to be connected, 2 pin of another termination MAX3232C chips of electric capacity C3, the electric capacity C2 other ends respectively with electric capacity C4 one end,
Line, 15 pin of MAX3232C chips are connected, 6 pin of another termination MAX3232C chips of electric capacity C4；8 pin of MAX3232C chips lead to
Reverse TVS diode D2 ground connection is crossed, 7 pin of MAX3232C chips are grounded by reverse TVS diode D4, MAX3232C chips
13 pin are grounded by reverse TVS diode D1, and 14 pin of MAX3232C chips are grounded by reverse TVS diode D3；
5 pin of MAX3232C chips are connected by electric capacity C6 with 4 pin of MAX3232C chips, and 3 pin of MAX3232C chips pass through electric capacity
C5 is connected with 1 pin of MAX3232C chips.
The utility model beneficial effect.
The utility model analyzes existing equipment operation principle and actual operating mode and the operation troubles that may occur, this
According to LNG points supply it is required it is continuous plus smelly, uniform plus smelly, avoid operation troubles, unattended, cost is cheap, stably may be used
The several basic principles leaned on, the utility model is based on the basis of existing plus smelly equipment and technology, in control system and gas flow
Several aspects such as the docking of meter signal, control system operating condition, equipment precision reasonable disposition have carried out the conscientiously technology of studying well and ground
Hair and improvement, and carried out long-term factory's internal model and fitted actual motion test, record operating condition overall process, monitoring pipe network end
End plus smelly concentration, control system control model and device configuration are repeatedly changed, reached the requirement of LNG points confession.
The utility model using pulse signal access it is reliable and stable continuously plus smelly, there is compensation to avoid odorant recharge work(
Can, it is unattended, cheap without using magnetic valve, cost.
The utility model employs pulse signal directly commander plus the output of smelly pump, reduces signal conversion process, no matter combustion gas
Flow it is how small or how long, reliably plus smelly can add smelly continuous-stable；Realization is servo-actuated plus smelly, and gas flow constantly changes odorant
Output quantity also changes therewith, and the odorizing agent concentration in guarantor unit's combustion gas is substantially uniform.
The utility model need not change existing equipment part-structure and configuration, and cost of goods manufactured is cheap.
The utility model adds smelly pipeline rear portion to be provided with check (non-return) valve.Add and non-return valve is equipped with smelly pipeline, high pressure resistant, pressurize
Persistently, corrosion-resistant No leakage.
Brief description of the drawings
Fig. 1 is device for adding odor normal operation mode schematic diagram.
Fig. 2 is device for adding odor recharge route schematic diagram.
Fig. 3, Fig. 4 are gas flow signals with adding smelly pump work frequency curve figure.
Fig. 5 is the utility model Power convert partial circuit schematic diagram.
Fig. 6 is the utility model eeprom circuit schematic diagram.
Fig. 7 is the utility model RS232 partial circuit schematic diagrams.
Fig. 8 is the utility model check valve drive control part circuit theory diagrams.
Fig. 9 is the electric operation control circuit figure that the utility model sets the magnetic valve for preventing recharge.
Figure 10 is the utility model CPU detection control relevant portion circuit theory diagrams.
Figure 11 is usb segment circuit theory diagrams in Figure 10.
Figure 12 is key part circuit theory diagrams in Figure 10.
Figure 13 is cpu circuit schematic diagram in Figure 10.
Figure 14 is clock circuit circuit theory diagrams in Figure 10.
Figure 15 is detection signal pulse input part and plus smelly pump drive control part circuit theory diagrams in Figure 10.
Figure 16 is LCDs partial circuit schematic diagram in Figure 10.
Figure 17 is automatic and manual control conversion control circuit.
Figure 18 is Pulse Width Control power unit (U3 in Figure 18 is LM2575 chips).The utility model Power convert part
Also Figure 18 circuit can be used.
Figure 19 is another embodiment of the utility model check valve drive control part.
Embodiment
As illustrated, the utility model, which can be applied to LNG points, supplies device for adding odor, when LNG points include pulse for device for adding odor
Section compensating controller (i.e. the utility model LNG points for pulse period control add smelly circuit), gas meter, odorizing agent storage tank,
Add smelly pump, lower check valve, upper check valve plus smelly pipeline and check (non-return) valve, the detection signal pulse of pulse period compensating controller defeated
Inbound port is connected with the detection signal pulse output end mouth of gas meter, the control signal output of pulse period compensating controller
Port is with adding the control signal input mouth of smelly pump to be connected；
Add the import of smelly pump to be connected by lower check valve with the outlet of odorizing agent storage tank, add smelly pump outlet pass through it is upper unidirectional
Valve adds smelly pipeline outlet to be connected by check (non-return) valve with gas pipeline with adding smelly line inlet to be connected.
Add smelly pump to extract odorant out out of odorizing agent storage tank and be output to upper check valve, odorant flows through plus smelly pipeline is to non-return
Enter gas pipeline after valve, odorant vaporization makes combustion gas have recognizable special odor with combustion gas mixing, ensures supply safety.
Described plus smelly pump uses oil-filled type electromagnetic diaphragm plunger metering pump.The liquid level gauge uses glass tube scale liquid position
Meter.
The detection signal pulse output end mouth of the gas meter is with 0.1m3Or 1.0m3Or 2m3Or 5m3Or 10m3Flow
A pulse signal is exported, pulse period compensating controller receives a pulse signal control plus the progress of smelly pump is one or many dynamic
Make.Each pulse follow-up signal can ensure plus smelly pump once or repeatedly acts, and effectively export a certain amount of odorant, subtract
Few signal conversion process, ensure that odorant continuously exports, a certain amount of combustion gas is often flowed through in guarantee, can all have a certain proportion of plus smelly
Agent output and combustion gas mixing.
Described plus smelly pump single output quantity is 50mg, and a pulse signal represents 5m3Gas quantity, pulse period compensation control
Device receives a pulse signal control plus smelly pump exports 2 times.
The pulse period compensating controller receives a pulse signal control plus smelly pump exports 0.4 time, 0.8 time, 2 times.
During less than 1 time, pulse period compensating controller exports 1 50mg odorant when gathering enough integer according to umber of pulse is cumulative；At the scene
Single output quantity is adjusted under operating mode, when a pulse signal represents 2m3 gas flows, single output quantity is adjusted to 80mg, and four
Smelly pump is added to act during individual pulse 1 time；
The making gas ordorous standard of unit is adjusted under operating mode at the scene, when a pulse signal represents 2m3 gas flows, will be added
Smelly standard is adjusted to 25mg/m3, and single output quantity can remain as 50mg, adds smelly pump to act 1 time during 2 pulses.
When (more than 30 minutes) are not moved for a long time, the control of pulse period compensating controller plus smelly pump increase described plus smelly pump
Add several times plus the motion of smelly pump, export some odorants, the odorant that combustion gas top is returned is supplemented, make the combustion gas amount of returning back to top with
Compensate output quantity and keep equal；Compensation rate and compensation number according to gas pipe pressure and lower check valve, upper check valve it is tight
Degree field measurement determine, and do tracking and monitoring adjust out compensation rate and compensate number (use average quality check valve, with
The measured data of DN8 calibers, 0.1MPa pressure, compensated 40 times or so in 24 hours planted agents.50 grams of left sides of every meter of volume of DN8 calibers
The right side, single output quantity 50mg, 40 40 × 50=2000mg=2 grams of output, about 4 centimetre lengths.The routinely reality of device for adding odor
Border installation method, add smelly length of pipeline all more than 3 meters, apart from more than 3.5 meters of check valve, do not have combustion gas substantially and enter unidirectionally
The possibility of valve.Accordingly data combustion gas enter check valve shortest time should be in 3.5 × 50 ÷ 2=87.5 days).By it is above-mentioned can
Know, the utility model pulse period compensating controller has for a long time without preventing gas recharge compensation plus smelly work(under gas flow operating mode
Energy.Using magnetic valve automatically close plus smelly pipeline on valve can play cut-out combustion gas recharge phenomenon, but need to increase magnetic valve,
The parts such as threeway, bypass pipe, by-passing valve and cable, there is cutting-off valve during for maintenance before and after magnetic valve.It is costly,
Inapplicable inexpensive LNG points are for adding smelly equipment.
Segment unit control model and automatic servo antrol pattern when the pulse period compensating controller includes manual, if
When automatic servo antrol pattern goes wrong, segment unit control model when starting manual, circuit theory Figure 17 is seen, in circuit design
Upper plus a 1K monitoring resistor R14, when pulse input signal end goes wrong, the DC 24V load meetings of this controller output
Change, monitoring resistor R14 can send variable signal and be transmitted to software program, and software can redirect automatically switches to manual period control
Molding formula.After pulse input signal end, which goes wrong, to be released from, the DC 24V loads of this controller output are automatic to recover normal,
Software can redirect automatically switches to automatic servo antrol pattern.
It is described manually when segment unit control model by segment unit when (24 hours) were divided into 48 in one day, every 30 minutes are one
Unit, the output times of 0~255 time are set when each in segment unit, output times are evenly distributed to per minute；It is per minute not
When sufficient 1 time, two minutes (or three minutes or more minutes) exports once, by that analogy；When being provided only with 1 output, at this
Segment unit exports for first minute, without output in remaining minute.
The automatic servo antrol pattern produced problem includes gas meter failure, gas meter maintenance, combustion gas
Flowmeter communicating interrupt.The pulse period compensating controller is arranged in tight anti-explosion casing；Suitable for outdoor in explosion-proof area
Long-term unattended continuous operation.
Piece electrical circuit is using low-power consumption, low heating design, without matching somebody with somebody radiating element, the electricity of Fig. 5 power unit outside
For subcomponent from being low-power consumption element, power unit circuit design is low power consumption switch adjustment circuit, substantially without heat during operation
Source produces, therefore without matching somebody with somebody radiating element outside.The pulse period compensating controller includes short-circuit protection and warning circuit；
The power supply of pulse period compensating controller uses the power supplies of external AC 220V ± 20%, pulse period compensation
Controller, which is provided with, can externally export the DC power output end mouth that 24V dc sources are powered to gas meter；
Pulse period compensating controller is provided with 0~300V pulse signal output end mouths, control plus smelly pump output 0~50
Beat/min, pulse signal width 200ms, peak value is 300V ± 20V, low peak 0V.
The pulse period compensating controller is provided with LCDs, and LCDs shows accumulative odorizing amount (unit
G), cumulative time (date Hour Minute Second), single odorizing amount (unit mg), natural clock date；Automatic servo antrol pattern shows
Show accumulative gas flow.Once, storage content includes automatic storage the pulse period compensating controller service data per hour
Storage time, accumulative odorizing amount；Service data amount of storage more than 35 days, artificial progress data storage is reset to add up again, does not enter
The stylish service data of row clear operation covers the legacy data that renewal substitutes early stage automatically.
The pulse period compensating controller is provided with data communication interface and exports USB interface, number for service data
RS485modbus communications protocol is used according to communication interface；When computer notebook or paid use MODSCON test softwares to pulse
Section compensating controller operational factor is set, Read Controller operation history data.
Service data is automatically saved when the shutdown of pulse period compensating controller or power-off suddenly, starts shooting or restores electricity
When original operational mode, set operational factor do not change.Using having EEPROM functions in CPU, in running status
When changing, its running status is constantly automatically credited in EEPROM, and when shutting down or powering off suddenly, data have been stored in
In EEPROM, when starting shooting or restore electricity again, data are read by EEPROM, and are run automatically by data storage.Ensure to supply
Gas adds smelly synchronization and crash analysis to investigate and collect evidence.The conversion relation of described plus smelly pump single output quantity and gas flow is：Q×S
=D × F × 60
The addition of odorant in unit combustion gas, S-standard of odorizing：mg/m3；Add smelly pump single output quantity, D-single is defeated
Output：Mg/ times；Add smelly pump maximum operating frequency, F-maximum operating frequency：Beat/min；Combustion gas highest hour flow：Q-maximum
Gas flow：m3/h；Set by button and add smelly pump maximum operating frequency.
Pulse period compensating controller is calculated according to gas flow change and standard of odorizing plus the output times of smelly pump.Such as
Fruit parameter setting malfunctions or transfinited, pulse period compensating controller alarm parameter setting mistake.
As another preferred scheme, communications protocol stipulations described in the utility model are as follows：
The pulse period compensating controller includes CPU, EEPROM, RS485 part, Power convert part, USB interface portion
Point, clock circuit, detection signal pulse input part, check valve drive control part, plus smelly pump drive control part, button portion
Point and LCDs, the signal transmission port with EEPROM, the signal of RS485 parts pass respectively for CPU signal transmission port
Defeated port, the signal transmission port of usb segment, the signal transmission port of clock circuit are connected, CPU detection signal input
Port is connected with the detection signal output port of detection signal pulse input part, the detection letter of detection signal pulse input part
Number input port is connected with the detection signal pulse output end mouth of gas meter；CPU operational factor set input port with
Key part is connected；
The CPU control signal output mouth control signal input mouth with check valve drive control part, plus smelly respectively
The control signal input mouth of pump drive control part is connected, the control signal output mouth difference of check valve drive control part
The control signal input mouth of control signal input mouth, upper check valve with lower check valve is connected, and adds smelly pump drive control part
The control signal output mouth divided is with adding the control signal input mouth of smelly pump to be connected；
CPU power port is connected with the output port of power source of Power convert part.Data output interface can be with 485 communications
Mouth is connected, remote transmission accumulation odorizing amount and service data.Pulse period compensating controller receives gas-burning pulse flow signal control
System plus smelly pump are by setting output quantity output odorant.Pulse period compensating controller carries out accumulation storage to service data, can lead to
Usb segment storage is crossed to arrive in external USB flash disk.
Key part can carry out system time setting, the setting of this station address, single dosing setting, match ratio setting, pulse
Follow-up flow setting, dosing frequency setting, the CPU use STC12C5A60S2 chip U1, detection signal pulse input part
24V power supplys are connect using TPL521 optocouplers U2, U2 1 pin, U2 2 pin connect the detection signal pulse of gas meter by resistance R6
Output port, U2 3 pin ground connection, U2 4 pin connect U1 12 pin.Described plus smelly pump drive control part uses TPL521 optocouplers
U3, U3 1 pin connect 5V power supplys, and U3 2 pin connected 34 pin that resistance R7 meets U1, and U3 4 pin, 3 pin connect the control letter for adding smelly pump
Number input port.
1 pin that the check valve drive control part includes TPL521 optocoupler U7 and TPL521 optocouplers U13, U7 passes through resistance
R40 connects 3.3V power supplys, and 21 pin of U7 2 pin respectively with resistance R41 one end, electric capacity C35 one end, U1 are connected, the electric capacity C35 other ends
Ground connection, 3 pin with U7, resistance R43 one end, resistance R42 one end are connected the resistance R41 other ends respectively, U7 4 pin and P-12V ends
Be connected, the resistance R43 other ends are connected with electric capacity C39 one end, NPN triode Q2 base stages respectively, the electric capacity C39 other ends respectively with electricity
The resistance R42 other ends, NPN triode Q2 emitter stages, ground wire are connected, NPN triode Q2 colelctor electrodes respectively with resistance R44 one end, under
The control signal input mouth of check valve is connected, and the resistance R44 other ends connect P-12V ends by LED D9；
U13 1 pin connects 3.3V power supplys by resistance R74, U13 2 pin respectively with resistance R77 one end, electric capacity C79 one end,
U1 22 pin are connected, electric capacity C79 other ends ground connection, the resistance R77 other ends 3 pin with U13, resistance R83 one end, resistance respectively
R80 one end is connected, and U13 4 pin are connected with P-12V ends, the resistance R83 other ends respectively with electric capacity C81 one end, NPN triode Q3
Base stage is connected, and the electric capacity C81 other ends are connected with the resistance R80 other ends, NPN triode Q3 emitter stages, ground wire respectively, the poles of NPN tri-
Control signal input mouth of the pipe Q3 colelctor electrodes respectively with resistance R86 one end, upper check valve is connected, and the resistance R86 other ends pass through
LED 15 connects P-12V ends.
The EEPROM includes 24C02 chips, 1,2,3, the 4 pin ground connection of 24C02 chips, 5 pin of 24C02 chips respectively with
Resistance R2 one end, cpu signal transmission port are connected, and 6 pin of 24C02 chips connect 3.3V power supplys by resistance R1, and resistance R2 is another
End is connected with 3.3V power supplys, 8 pin of 24C02 chips, electric capacity C1 one end respectively, electric capacity C1 other ends ground connection.
1 pin of the RS485 part including MAX485E chips U5, U5 is connected with U1 10 pin, U5 2 pin respectively with U5
3 pin, U1 14 pin be connected, U5 4 pin are connected with U1 11 pin, U5 5 pin ground connection, U5 6 pin respectively with resistance R14 mono-
End, coffret J7 A mouths are connected, and the B mouths with coffret J7, U5 7 pin are connected the resistance R14 other ends respectively, U5 8 pin
Connect 5V power supplys.
1 pin of the Power convert part including LM2596 chip U9 and LM1117 chips U10, U9 respectively with diode
D12 negative electrodes, 12V power ends, electric capacity C44 positive poles, electric capacity C46 one end are connected, and diode D12 anodes connect switched power output,
Switching Power Supply input termination civil power；Electric capacity C44 negative poles, the electric capacity C46 other ends, U9 5 pin, U9 3 pin ground connection, U9 2 pin point
It is not connected with Schottky diode D13 negative electrodes, inductance L5 one end, Schottky diode D13 plus earths, the inductance L5 other ends point
3 pin not with electric capacity C50 positive poles, U9 4 pin, 5V power ends, electric capacity C52 one end, U10 are connected, electric capacity C50 negative poles, electric capacity C52
The 1 pin ground connection of the other end, U10；U10 2 pin are connected with electric capacity C53 one end, inductance L6 one end respectively, another terminations of electric capacity C53
Ground, the inductance L6 other ends are connected with 3.3V power ends, electric capacity C55 one end, resistance R46 one end respectively, another terminations of electric capacity C55
Ground, the resistance R46 other ends are grounded by LED D14.
The usb segment includes HEADER 14X2USB chips, and 2 pin of USB chips meet 3V3 by 0.47 μ F electric capacity
Power supply, 5 pin of USB chips connect U1 3 pin, and 4 pin with U1,3V3 power supplys are connected 6 pin of USB chips respectively, 9 pin of USB chips
11 pin with 10nF electric capacity one end, USB chips are connected respectively, 10nF electric capacity other end ground connection；13 pin of USB chips respectively with
12M crystal oscillators one end, the first 22pF electric capacity one end are connected, the first 22pF electric capacity other end ground connection, and the 12M crystal oscillators other end is respectively with the
Two 22pF electric capacity one end, 14 pin of USB chips are connected, and the 2nd 22pF electric capacity other end ground connection, 24 pin of USB chips pass sequentially through
Reverse light emitting diode, 1K resistance connect 3V3 power supplys.
2,3 pin of the clock circuit including 1302 chip U4, U4 connect 32K768 crystal oscillators both ends, U4 5 pin respectively with electricity
Resistance R12 one end, U1 38 pin are connected, another termination 5V power supplys of resistance R12, U4 6 pin respectively with resistance R11 one end, U1 37
Pin is connected, another termination 5V power supplys of resistance R11, and 36 pin of U4 7 pin respectively with resistance R10 one end, U1 are connected, and resistance R10 is another
One termination 5V power supplys；U4 8 pin connect battery.
The key part includes KEYLEFT buttons, KEYUP buttons, KEYDOWN buttons, KEYSET buttons, KEYRIGHT
Button and KEYCHANGE buttons, 2 pin of the tie point of KEYLEFT buttons one respectively with resistance R2 one end, U1 are connected, and KEYLEFT is pressed
Another tie point ground connection of key；5 pin of the tie point of KEYUP buttons one respectively with resistance R3 one end, U1 are connected, and KEYUP buttons are another
Tie point is grounded；7 pin of the tie point of KEYDOWN buttons one respectively with resistance R4 one end, U1 are connected, another company of KEYDOWN buttons
Contact is grounded；6 pin of the tie point of KEYSET buttons one respectively with resistance R5 one end, U1 are connected, another tie point of KEYSET buttons
Ground connection；8 pin of the tie point of KEYRIGHT buttons one respectively with resistance R1 one end, U1 are connected, another tie point of KEYRIGHT buttons
Ground connection；1 pin of the tie point of KEYCHANGE buttons one respectively with resistance R2 one end, U1 is connected, another connection of KEYCHANGE buttons
Point ground connection；The resistance R2 other ends, the resistance R3 other ends, the resistance R4 other ends, the resistance R5 other ends, the other end of resistance 1, resistance R2
The other end is connected.The control signal input mouth of the lower check valve and the control signal input mouth of upper check valve use solid-state
Relay.
2 pin with 521 optocoupler U19, electric capacity C102 one end are connected 23 pin of the U1 respectively, electric capacity C102 other ends difference
Be connected with ground wire, U19 3 pin, U19 1 pin connects 3.3V power supplys by resistance R121, U19 4 pin by resistance R125 respectively with
Electric capacity C104 one end, PNP triode Q6 base stages are connected, the electric capacity C104 other ends respectively with ground wire, PNP triode Q6 colelctor electrode phases
Even, PNP triode Q6 emitter stages are connected with diode D18 anodes, relay K5 control terminals one end respectively, diode D18 negative electrodes
Be connected respectively with the relay K5 control terminals other end, POWER power ends, relay K5 controlled switch fixing ends, relay K5 by
Control switch first stirs termination P-12V ends, and the control of the magnetic valve of non-return filling is taken over control in the second struck side of relay K5 controlled switch
End, prevent recharge magnetic valve be arranged on check valve and add smelly pipeline between.Can be equipped with prevents the magnetic valve of recharge, CPU prisons
Survey plus smelly pump acts feedback loop output signal break time, there is no output signal in setting time, relay K5 can control electromagnetism
Valve is closed, and prevents combustion gas recharge from occurring.When output signal transmits again, magnetic valve is opened immediately, continues to output odorant.Institute
39 pin for stating U1 are connected by resistance R9 with PNP triode Q2 base stage, and PNP triode Q2 emitter stage meets 5V power supplys, PNP tri-
Pole pipe Q2 colelctor electrode connects buzzer positive pole, buzzer negative pole ground connection.Buzzer carries out fault alarm.The LCDs is adopted
With OCMJ4X8C LCD MODULEs.The utility model also includes RS232 parts, and RS232 parts include MAX3232C chips,
10,11 pin of 12,11 pin of MAX3232C chips respectively with U1 are connected, 16 pin of MAX3232C chips respectively with 3.3V power supplys,
Electric capacity C3 one end, electric capacity C2 one end are connected, 2 pin of another termination MAX3232C chips of electric capacity C3, the electric capacity C2 other ends respectively with
Electric capacity C4 one end, ground wire, 15 pin of MAX3232C chips are connected, 6 pin of another termination MAX3232C chips of electric capacity C4；
8 pin of MAX3232C chips are grounded by reverse TVS diode D2, and 7 pin of MAX3232C chips pass through reverse TVS diode D4
Ground connection, 13 pin of MAX3232C chips are grounded by reverse TVS diode D1, and 14 pin of MAX3232C chips pass through reverse TVS
Diode D3 is grounded；5 pin of MAX3232C chips are connected by electric capacity C6 with 4 pin of MAX3232C chips, MAX3232C chips
3 pin be connected by electric capacity C5 with 1 pin of MAX3232C chips.
Claims (10)
1.LNG points connect for pulse period control plus smelly circuit, including CPU, EEPROM, RS485 part, Power convert part, USB
Oral area point, clock circuit, detection signal pulse input part, check valve drive control part plus smelly pump drive control part, press
Key section and LCDs, it is characterised in that CPU signal transmission port respectively the signal transmission port with EEPROM,
The signal transmission port of RS485 parts, the signal transmission port of usb segment, the signal transmission port of clock circuit are connected,
CPU detection signal input port is connected with the detection signal output port of detection signal pulse input part, detection signal arteries and veins
The detection signal input port of importation is rushed with the detection signal pulse output end mouth of gas meter to be connected；
CPU operational factor sets input port to be connected with key part；
The control signal input mouth with check valve drive control part plus smelly pump drive CPU control signal output mouth respectively
The control signal input mouth of dynamic control section is connected, and the control signal output mouth of check valve drive control part is respectively with
The control signal input mouth of check valve, the control signal input mouth of upper check valve are connected, and add smelly pump drive control part
Control signal output mouth is with adding the control signal input mouth of smelly pump to be connected；
CPU power port is connected with the output port of power source of Power convert part；
The CPU uses STC12C5A60S2 chips U1；
The detection signal pulse input part connects 24V power supplys using TPL521 optocouplers U2, U2 1 pin, and U2 2 pin pass through resistance
R6 connects the detection signal pulse output end mouth of gas meter, U2 3 pin ground connection, and U2 4 pin connect U1 12 pin；
Described plus smelly pump drive control part connects 5V power supplys using TPL521 optocouplers U3, U3 1 pin, and U3 2 pin connected resistance
R7 connects U1 34 pin, and U3 4 pin, 3 pin connect the control signal input mouth for adding smelly pump；
1 pin of the RS485 part including MAX485E chips U5, U5 is connected with U1 10 pin, U5 2 pin respectively with U5 3
Pin, U1 14 pin are connected, and U5 4 pin are connected with U1 11 pin, U5 5 pin ground connection, U5 6 pin respectively with resistance R14 one end, pass
Defeated interface J7 A mouths are connected, and the B mouths with coffret J7, U5 7 pin are connected the resistance R14 other ends respectively, and U5 8 pin meet 5V
Power supply；
1 pin that the Power convert part includes LM2596 chip U9 and LM1117 chips U10, U9 is cloudy with diode D12 respectively
Pole, 12V power ends, electric capacity C44 positive poles, electric capacity C46 one end are connected, and diode D12 anodes connect switched power output, switch electricity
Source input termination civil power；Electric capacity C44 negative poles, the electric capacity C46 other ends, U9 5 pin, U9 3 pin ground connection, U9 2 pin respectively with Xiao
Special based diode D13 negative electrodes, inductance L5 one end are connected, Schottky diode D13 plus earths, the inductance L5 other ends respectively with electricity
Appearance C50 positive poles, U9 4 pin, 5V power ends, electric capacity C52 one end, U10 3 pin are connected, and electric capacity C50 negative poles, electric capacity C52 are another
End, U10 1 pin ground connection；U10 2 pin are connected with electric capacity C53 one end, inductance L6 one end respectively, electric capacity C53 other ends ground connection, electricity
The sense L6 other ends are connected with 3.3V power ends, electric capacity C55 one end, resistance R46 one end respectively, electric capacity C55 other ends ground connection, resistance
The R46 other ends are grounded by LED D14.
2. LNG points are for pulse period control plus smelly circuit according to claim 1, it is characterised in that the check valve driving control
1 pin of the system part including TPL521 optocoupler U7 and TPL521 optocouplers U13, U7 connects 3.3V power supplys, U7 2 pin point by resistance R40
21 pin not with resistance R41 one end, electric capacity C35 one end, U1 are connected, electric capacity C35 other ends ground connection, resistance R41 other ends difference
3 pin, resistance R43 one end with U7, resistance R42 one end are connected, and U7 4 pin are connected with P-12V ends, resistance R43 other ends difference
Be connected with electric capacity C39 one end, NPN triode Q2 base stages, the electric capacity C39 other ends respectively with the resistance R42 other ends, NPN triode
Q2 emitter stages, ground wire are connected, NPN triode Q2 colelctor electrodes respectively with resistance R44 one end, the control signal input of lower check valve
Mouth is connected, and the resistance R44 other ends connect P-12V ends by LED D9；
U13 1 pin connects 3.3V power supplys by resistance R74, U13 2 pin respectively with resistance R77 one end, electric capacity C79 one end, U1
22 pin are connected, electric capacity C79 other ends ground connection, the resistance R77 other ends 3 pin with U13, resistance R83 one end, resistance R80 mono- respectively
End be connected, U13 4 pin are connected with P-12V ends, the resistance R83 other ends respectively with electric capacity C81 one end, NPN triode Q3 base stage phases
Even, the electric capacity C81 other ends are connected with the resistance R80 other ends, NPN triode Q3 emitter stages, ground wire respectively, NPN triode Q3 collection
Control signal input mouth of the electrode respectively with resistance R86 one end, upper check valve is connected, and the resistance R86 other ends pass through LED 15
Connect P-12V ends.
3. LNG points are for pulse period control plus smelly circuit according to claim 1, it is characterised in that the EEPROM includes
24C02 chips, 1,2,3, the 4 pin ground connection of 24C02 chips, 5 pin of 24C02 chips transmit with resistance R2 one end, cpu signal respectively
Port is connected, and 6 pin of 24C02 chips connect 3.3V power supplys by resistance R1, the resistance R2 other ends respectively with 3.3V power supplys, 24C02
8 pin of chip, electric capacity C1 one end are connected, electric capacity C1 other ends ground connection.
4. LNG points are for pulse period control plus smelly circuit according to claim 1, it is characterised in that the usb segment
Including HEADER 14X2USB chips, 2 pin of USB chips connect 3V3 power supplys by 0.47 μ F electric capacity, and 5 pin of USB chips connect U1's
3 pin, 4 pin with U1,3V3 power supplys are connected 6 pin of USB chips respectively, 9 pin of USB chips respectively with 10nF electric capacity one end, USB
11 pin of chip are connected, 10nF electric capacity other end ground connection；13 pin of USB chips respectively with 12M crystal oscillators one end, the first 22pF electric capacity
One end is connected, the first 22pF electric capacity other end ground connection, the 12M crystal oscillators other end respectively with the 2nd 22pF electric capacity one end, USB chips
14 pin are connected, and the 2nd 22pF electric capacity other end ground connection, 24 pin of USB chips pass sequentially through reverse light emitting diode, 1K resistance connects
3V3 power supplys.
5. LNG points are for pulse period control plus smelly circuit according to claim 1, it is characterised in that the clock circuit includes
1302 chip U4, U4 2,3 pin connect 32K768 crystal oscillators both ends, and 38 pin of U4 5 pin respectively with resistance R12 one end, U1 are connected, electricity
Another termination 5V power supplys of R12 are hindered, 37 pin of U4 6 pin respectively with resistance R11 one end, U1 are connected, and another termination 5V of resistance R11 are electric
Source, 36 pin of U4 7 pin respectively with resistance R10 one end, U1 are connected, another termination 5V power supplys of resistance R10；U4 8 pin connect battery.
6. LNG points are for pulse period control plus smelly circuit according to claim 1, it is characterised in that the key part includes
KEYLEFT buttons, KEYUP buttons, KEYDOWN buttons, KEYSET buttons, KEYRIGHT buttons and KEYCHANGE buttons,
2 pin of the tie point of KEYLEFT buttons one respectively with resistance R2 one end, U1 are connected, another tie point ground connection of KEYLEFT buttons；
5 pin of the tie point of KEYUP buttons one respectively with resistance R3 one end, U1 are connected, another tie point ground connection of KEYUP buttons；
7 pin of the tie point of KEYDOWN buttons one respectively with resistance R4 one end, U1 are connected, and another tie point of KEYDOWN buttons connects
Ground；6 pin of the tie point of KEYSET buttons one respectively with resistance R5 one end, U1 are connected, another tie point ground connection of KEYSET buttons；
8 pin of the tie point of KEYRIGHT buttons one respectively with resistance R1 one end, U1 are connected, and another tie point of KEYRIGHT buttons connects
Ground；1 pin of the tie point of KEYCHANGE buttons one respectively with resistance R2 one end, U1 is connected, another tie point of KEYCHANGE buttons
Ground connection；
The resistance R2 other ends, the resistance R3 other ends, the resistance R4 other ends, the resistance R5 other ends, the other end of resistance 1, resistance R2 are another
One end is connected.
7. LNG points are for pulse period control plus smelly circuit according to claim 1, it is characterised in that the control of the lower check valve
The control signal input mouth of signal input port processed and upper check valve uses solid-state relay.
8. LNG points are for pulse period control plus smelly circuit according to claim 1, it is characterised in that the 23 pin difference of the U1
2 pin, electric capacity C102 one end with 521 optocoupler U19 are connected, and 3 pin of the electric capacity C102 other ends respectively with ground wire, U19 are connected, U19
1 pin 3.3V power supplys are connect by resistance R121, U19 4 pin by resistance R125 respectively with electric capacity C104 one end, PNP triode
Q6 base stages are connected, and the electric capacity C104 other ends are connected with ground wire, PNP triode Q6 colelctor electrodes respectively, PNP triode Q6 emitter stages point
It is not connected with diode D18 anodes, relay K5 control terminals one end, diode D18 negative electrodes are another with relay K5 control terminals respectively
One end, POWER power ends, relay K5 controlled switch fixing ends are connected, and relay K5 controlled switch first stirs termination P-12V
End, the second struck side of relay K5 controlled switch take over control the control terminal of the magnetic valve of non-return filling, prevent the magnetic valve of recharge from setting
Upper check valve and add smelly pipeline between.
9. LNG points are for pulse period control plus smelly circuit according to claim 1, it is characterised in that 39 pin of the U1 pass through
Resistance R9 is connected with PNP triode Q2 base stage, and PNP triode Q2 emitter stage connects 5V power supplys, PNP triode Q2 colelctor electrode
Connect buzzer positive pole, buzzer negative pole ground connection.
10. LNG points are for pulse period control plus smelly circuit according to claim 1, it is characterised in that also including RS232 portions
Point, RS232 parts include MAX3232C chips, and 10,11 pin of 12,11 pin of MAX3232C chips respectively with U1 are connected,
16 pin of MAX3232C chips are connected with 3.3V power supplys, electric capacity C3 one end, electric capacity C2 one end respectively, another terminations of electric capacity C3
2 pin of MAX3232C chips, 15 pin of the electric capacity C2 other ends respectively with electric capacity C4 one end, ground wire, MAX3232C chips are connected, electricity
Hold 6 pin of another termination MAX3232C chips of C4；8 pin of MAX3232C chips are grounded by reverse TVS diode D2,
7 pin of MAX3232C chips are grounded by reverse TVS diode D4, and 13 pin of MAX3232C chips pass through reverse TVS diode
D1 is grounded, and 14 pin of MAX3232C chips are grounded by reverse TVS diode D3；5 pin of MAX3232C chips pass through electric capacity C6
It is connected with 4 pin of MAX3232C chips, 3 pin of MAX3232C chips are connected by electric capacity C5 with 1 pin of MAX3232C chips.
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| CN201720931679.5U CN207115102U (en) | 2017-07-28 | 2017-07-28 | LNG points are for pulse period control plus smelly circuit |
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| CN201720931679.5U CN207115102U (en) | 2017-07-28 | 2017-07-28 | LNG points are for pulse period control plus smelly circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247429A (en) * | 2017-07-28 | 2017-10-13 | 沈阳光正工业有限公司 | LNG points are for pulse period control plus smelly circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247429A (en) * | 2017-07-28 | 2017-10-13 | 沈阳光正工业有限公司 | LNG points are for pulse period control plus smelly circuit |
| CN107247429B (en) * | 2017-07-28 | 2024-04-05 | 沈阳光正工业有限公司 | LNG point supplies pulse period control odorizing circuit |
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