CN206754798U - CNG gas stations and its PLC sequential control disk automatic control systems - Google Patents
CNG gas stations and its PLC sequential control disk automatic control systems Download PDFInfo
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- CN206754798U CN206754798U CN201720277645.9U CN201720277645U CN206754798U CN 206754798 U CN206754798 U CN 206754798U CN 201720277645 U CN201720277645 U CN 201720277645U CN 206754798 U CN206754798 U CN 206754798U
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Abstract
The utility model discloses a kind of CNG gas stations, including compressor, high pressure dehydration device, sequential control disk, caisson and filling machine；It is characterized in that：Caisson is gas bomb, and gas bomb includes the cylindrical circular first kind gas bomb of the equal profile of volume, the second class gas bomb and the 3rd class gas bomb；All gas bombs are vertically fixedly mounted on same be fixedly installed in the mounting bracket on ground.The invention also discloses a kind of PLC sequential controls disk automatic control system, the PLC sequential controls disk automatic control system be included in installed on each gas bomb be used for measure gas bomb air pressure inside and can outwards export the pressure gauge of analog signal, the pressure gauge is connected with control main frame signal；And the magnetic valve of a controlled host computer control is provided with every pipeline.CNG gas stations of the present utility model and its PLC sequential control disk automatic control systems can reduce construction amount, the construction efficiency of lifting CNG gas stations, reducing the construction costs.
Description
Technical field
The utility model belongs to CNG gas stations field, and in particular to a kind of CNG gas stations and its PLC sequential controls disk are certainly
Autocontrol system.
Background technology
CNG（Chinese is entitled：Compressed natural gas, English full name are：CompressedNaturalGas, abbreviation CNG）It is one
Kind is stored in the fuel of container by natural gas pressurization and with gaseous state.CNG main component is methane（CH4）, after methyl hydride combustion
Product is carbon dioxide and water, so, compressed natural gas（CNG）Have that safe and environment-friendly, economic dispatch is superior as motor vehicle fuel
Property, CNG popularization is with using the environmental protection and sustainable development to city.Also exactly because CNG has many advantages, such as the above, therefore mesh
CNG gas stations in preceding city are more and more, and the automobile using CNG as fuel is also more and more.
At present, it is entitled《CNG gas stations process optimization design search》Document give the total of Liang Zhong CNG gas stations
Body structure, referring in this specification accompanying drawing 1 and Fig. 2, Fig. 1 and Fig. 2 mark for：1 pipeline carrys out gas, and 2 surge tanks, 3 compressors, 4 is cold
But tower, 5 high pressure dehydration devices, 6 sequential control disks, 7 well for storage, 8 filling machines.
But the depth of well for storage is deeper in the structure of above-mentioned gas station, excavation amount is larger, and construction is time-consuming longer.
Based on this, applicant considers that design a kind of the CNG gas stations that can reduce construction amount and its PLC sequential control disks controls automatically
System processed.
Utility model content
For above-mentioned the deficiencies in the prior art, technical problem to be solved in the utility model is：How a kind of energy is provided
Enough reduce the CNG gas stations and its PLC sequential control disk automatic control systems of construction amount.
In order to solve the above-mentioned technical problem, the utility model employs following technical scheme：
CNG gas stations, including compressor, high pressure dehydration device, sequential control disk, caisson and filling machine；The pressure
The air inlet of contracting machine is used to be connected with gas source sealing, and the gas outlet of the compressor is filled by pipeline and the high press-dehydrating
The import put is connected, and the outlet of the high pressure dehydration device is connected by pipeline with the infeed mouth of sequential control disk, the order
The output port of control panel is individually connected between the input port of the gas bomb and the air supply opening of filling machine by pipeline respectively,
And it is connected between the delivery outlet of the gas bomb and the air supply opening of the filling machine by seal for pipe joints；It is characterized in that：
The caisson is gas bomb, and the gas bomb includes being that volume is equal and profile cylindrical circular first
Class gas bomb, the second class gas bomb and the 3rd class gas bomb, after the storage of each first kind gas bomb is full air pressure inside be 25Mpa extremely
23Mpa, air pressure inside is 24Mpa to 22Mpa after each second class gas bomb storage is full, internal after each 3rd class gas bomb storage is full
Air pressure is 23Mpa to 20Mpa；The bottle number ratio of the first kind gas bomb, the second class gas bomb and the second class gas bomb is 1:2:
3；Each gas bomb is connected by pipeline interface corresponding with sequential control disk respectively；All gas bombs are vertically solid
Dingan County is mounted in same in the mounting bracket on ground.
Generally, the operating pressure for the air accumulator installed on automobile is 20Mpa（Volume is usually 60 to 100L）.
Using above-mentioned gas storage aerating structure carry out aerating when, you can when aerating amount is less, using the 3rd class gas bomb come
Realize aerating at a slow speed；When aerating amount demand is larger, you can using first kind gas bomb, the second class gas bomb and the 3rd class gas storage
Bottle realizes quick recharge jointly, and improves the aerating efficiency and benefit of CNG gas stations whereby.It can be seen that above-mentioned gas storage aerating knot
Structure disclosure satisfy that the aerating of CNG gas stations meets situation pockety.
Just open and compress when carrying out gas storage using above-mentioned gas storage aerating structure, during natural unsaturated vapor in most gas bombs
Machine to supply each gas bomb, so as to effectively reduce the number of starts of compressor, increases the service life.It is in addition, all
Gas bomb is vertically fixedly mounted on the same structure in the mounting bracket on ground so that bottle is overall more to save CNG aeratings
While the floor space stood, reduce the construction task of CNG gas stations, shorten CNG gas stations from building to formally using when
Between.
A kind of PLC sequential control disk automatic control systems of above-mentioned CNG gas stations, including control main frame, the control master
Each switch input unit, switch amount output unit, analog input unit and the analog output unit of machine and CNG gas stations
It is respectively connected with；It is characterized in that：Being used for of also including installing on each gas bomb measures gas bomb air pressure inside and can
Outwards the pressure gauge of output analog signal, the pressure gauge are connected with control main frame signal；And it is provided with one on every pipeline
The magnetic valve of individual controlled host computer control.
The use of above-mentioned PLC sequential controls disk automatic control system, you can each storage is quickly obtained by control main frame
The pressure of gas cylinder, and then control magnetic valve to be inflated gas bomb in time.
Preferably, the PLC sequential control disks automatic control system of above-mentioned CNG gas stations also includes control slave；Wherein,
The control main frame includes two main station controllers, and the control slave includes two from station control, single main station controller
With it is single from station control correspond and be connected between each other using cable signal；Each pass through cable and institute from station control
State each switch input unit, switch amount output unit, analog input unit and the analog output unit letter of CNG gas stations
Number be connected.
The PLC sequential control disk automatic control system generally use separate unit control main frames of existing CNG gas stations are being run,
And deadlock situation is difficult to avoid that in the process of running, so as to lose the monitoring function to each instrument of CNG gas stations, easily trigger
Security incident.
The PLC sequential control disks automatic control system of CNG gas stations of the present utility model when in use, passes through each slave station
Controller obtains each switch input unit, switch amount output unit, analog input unit and the analog quantity of CNG gas stations
The signal of output unit, so, you can by it is each from station control come gather in CNG gas stations each electric control gear and
The status data of instrument.At the same time, it is each to be connected by communication between station control and corresponding single main station controller, so
One, each main station controller can carry out the start and stop and action of each equipment in output signal control CNG gas stations according to situation
Signal is given from station control, so as to complete the start-up and shut-down control to each equipment.
So the PLC sequential control disks automatic control system of CNG gas stations of the present utility model has two sets of processor systems
System, is run in a manner of the using and the reserved, when main station controller A is run, is worked from station control A, control input output module
Unit, and main station controller B is standby.When main station controller B is run, worked from station control B, control input output module list
Member, and main station controller A is standby.Two processors can be automatically switched and manual switching, considerably increase PLC sequential controls
The safety in utilization and service life of disk automatic control system.
Preferably, the PLC sequential control disks automatic control system of above-mentioned CNG gas stations also includes ups power, it is described
The power access end of ups power is electrically connected by cable and city, and the power output end of the ups power passes through cable and each master
Station control is connected with from station control.
Using after this optimal technical scheme, you can having civil power using the power storage unit inside ups power（Civil power is
Industrial-frequency alternating current described in us（AC））In the case of store electricity；In the case where civil power powers off, ups power itself can be quick
It is switched to by storage electricity come supplying power for outside, and then improves PLC sequential control disk automatic control system reliabilities of operation.
Preferably, the main station controller is programmable controller.
So, you can utilize programmable controller（English abbreviation：PLC）, possessed is stable and reliable for performance, journey
Sequence writes the advantages of convenient.And when implementing, it is preferred to use Siemens production possesses cost-effective, electromagnetic compatibility
Property strong, the S7-300 Series Programmables of the good advantage of concussion resistibility performance.
Preferably, it is described from station control be any one in programmable controller or interface module.
When being programmable controller from station control, advantageous effects are obtained with main station controller using programmable
The advantageous effects of sequence controller.When being interface module from station control（For example, the interface of the series of Siemens Company IM 153
Module）, then lower with cost, the advantages of clock synchronization and precision reach 1ms timestamp, so as to more help this practicality newly
The PLC sequential control disks automatic control system of the CNG gas stations of type obtains more high control precision and corresponding speed.
Preferably, the PLC sequential control disks automatic control system of above-mentioned CNG gas stations also includes signal distributor；Often
Individual switch input unit, switch amount output unit, analog input unit and analog output unit pass through a cable respectively
It is connected with each corresponding signaling interface on the signal distributor, the signal distributor is again with two from station control
Corresponding interface is connected.
After above-mentioned signal distributor, each signal can be divided into two by above-mentioned signal distributor, be come with this
Reduce each switch input unit, switch amount output unit, analog input unit and analog output unit and two slave stations
Line amount between controller, simplify connection circuitry, improve the reliability of wiring.
As well known to those skilled in the art, signal distributor is that one kind is widely used in machinery, electric, telecommunications, electric power, stone
The data acquisition in the fields such as oil, chemical industry, steel, sewage disposal, building construction, signal transmit the industrial measurement and controls such as conversion, PLC, DCS
System, for improving the reliability with replenishment system Mo Ni ∣/O pin functions, increase system suitability and site environment.Signal
The mode of connection of distributor is technology as well known to those skilled in the art, and therefore not to repeat here.
Preferably, the PLC sequential control disk automatic control systems of above-mentioned CNG gas stations are additionally included in CNG gas stations
Cooling tower outer surface on the cooling tower vibration detection mechanism installed, the cooling tower vibration detection mechanism include vibration pickup,
Battery, alarm and controller；The vibration pickup, battery and alarm are connected by cable with controller respectively.
Because multiple vibration sources are provided with cooling tower（Such as：Blower fan, water supply pump and spray pump）, and it is cold in order to strengthen
But effect, the cooling tower set in each CNG gas stations are essentially arranged side by side two.So, i.e., when cooling tower is run,
The common vibration of each blower fan, water supply pump and water pump of spraying water forms resonance, the overall extent of vibration of increase cooling tower.And because
To there are at least two tie points, above-mentioned vibration is to cause company in the course of time between the air delivering pipeline of cooling tower and CNG gas stations
The loosening of contact, so as to trigger the security incident of leakage.
Based on above-mentioned background, cooling tower vibration detection mechanism when in use, the vibration of cooling tower is measured by vibration pickup
（Vibration pickup is a kind of vibration-measuring sensor, is that a kind of will vibrate is transformed into the device of corresponding electric signal）.And set in the controller
The alarm threshold value of a fixed vibration pickup, when vibration pickup detects that vibration values are signaled to controller more than or equal to alarm threshold value
Alarm equipment alarm is controlled, so as to remind the staff at scene, weakening processing need to be carried out to cooling tower as early as possible, be added with lifting CNG
The operational reliability at gas station.
Preferably, the PLC sequential control disks automatic control system of above-mentioned CNG gas stations also includes compressor cooling control
System, the compressor cooling control system include the liquid level sensor in the cistern of cooling tower interior bottom portion, institute
The terminals for stating liquid level sensor are connected by cable with control main frame signal；It is installed with cooling tower for cooling tower
The feed pipe that the cistern of interior bottom portion supplies water, magnetic valve, the terminals of the magnetic valve are installed with the feed pipe
It is connected by cable with control main frame signal.
Compressor cooling system includes cooling tower, and cooling coil pipe is internally provided with the cooling tower, and the cooling is used
The input port of coil pipe and delivery outlet are respectively positioned on outside cooling tower, and the input port is connected with the delivery outlet sealing of compressor, institute
Delivery outlet is stated with the input port sealing of high pressure dehydration device to be connected.
It is used for cooling tower in through compressor pressurization compression after high-temperature natural gas（70 degree or so）Cooled down, prevented because of heat
The metering for each measuring instrument installed in CNG gas stations caused by swollen shrinkage has error.So the use of cooling tower can
Ensure that the metering of each measuring instrument installed in CNG gas stations is more accurate.
After above-mentioned compressor cooling control system, cooling tower interior bottom portion can be detected by liquid level sensor
Liquid level depth in cistern, and then be signaled to control main frame in low water level and carry out opens solenoid valve, so that supplying water
Pipe supplies water to cistern.The long-term cooling effect for ensuring compressor, improve the security reliability of CNG gas stations operation.
Preferably, the liquid level sensor be arranged at that the cistern depth direction is in high school at low three for distribution three
It is individual.
Above three liquid level sensor can not only improve the reliability for cistern water level monitoring（Prevention is using single
Individual liquid level sensor, the liquid level sensor break down, and cause the situation that can not monitor water level to occur）；Three can also be passed through
Liquid level sensor easily to cause that the control of cooling tower is more accurate reliable, for example, when the liquid level for being in high position passes
When sensor sends signal, then control main frame supplies water to the liquid level sensor blackout to solenoid signal；But when be in it is high and
When two liquid level sensors of middle position send signal, then mean that being possible to magnetic valve evil idea or the watering of feed pipe disconnects,
It need to overhaul in time；When being in three liquid level sensors that are high, neutralizing lower position, then need to send emergency alarm in time to enter
Row rapid rush-repair.To sum up, it can be seen that the setting of three liquid level sensors, enable to the operation of compressor cooling system more
Securely and reliably.
Brief description of the drawings
The structural representation for the CNG gas stations that Fig. 1 and Fig. 2 is introduced by background technology.
Fig. 3 is the structural representation of CNG gas stations of the present utility model.
Fig. 4 is the structural representation of the PLC sequential control disk automatic control systems of CNG gas stations of the present utility model.
Fig. 5 is the dimensional structure diagram of cooling tower in CNG gas stations of the present utility model.
Fig. 6 is the electrical wiring schematic diagram of cooling tower in CNG gas stations of the present utility model.
Fig. 7 is the setting schematic diagram of liquid level sensor in cooling tower in CNG gas stations of the present utility model.
In upper figure mark for：
1 pipeline carrys out gas；
2 surge tanks；
3 compressors；
4 cooling towers；
5 high pressure dehydration devices；
6 sequential control disks；
7 well for storage；
8 filling machines；
41 blower fans, 42 water supply pumps, 43 spray pumps, 44 vibration pickups；
71 first kind gas bombs, 72 second class gas bombs, 73 the 3rd class gas bombs；
9 liquid level sensors；
10 traffic flow detecting devices.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.Wherein, for description using it is all as above,
Under, the exemplary term such as left and right, it is therefore intended that help reader to understand, without being intended for limiting.
As shown in Fig. 3 to Fig. 7, a kind of CNG gas stations, including compressor 3, high pressure dehydration device 5, sequential control disk 6, storage
Device of air and filling machine 8；The air inlet of the compressor 3 is used to be connected with gas source sealing, the gas outlet of the compressor 3
It is connected by pipeline with the import of the high pressure dehydration device 5, the outlet of the high pressure dehydration device 5 is controlled by pipeline and order
The infeed mouth of disk 6 processed is connected, the output port of the sequential control disk 6 input port with the gas bomb and filling machine 8 respectively
Air supply opening between be individually connected by pipeline, and between the air supply opening of the delivery outlet of the gas bomb and the filling machine 8 lead to
Piping sealing is connected；
The caisson is gas bomb, and the gas bomb includes being that volume is equal and profile cylindrical circular first
Class gas bomb 71, the second class gas bomb 72 and the 3rd class gas bomb 73, air pressure inside is after each storage of first kind gas bomb 71 is full
25Mpa to 23Mpa, air pressure inside is 24Mpa to 22Mpa after the storage of each second class gas bomb 72 is full, each 3rd class gas bomb
Air pressure inside is 23Mpa to 20Mpa after 73 storages are full；The first kind gas bomb 71, the second class gas bomb 72 and the second class gas storage
The bottle number ratio of bottle 72 is 1:2:3；Each gas bomb is connected by pipeline interface corresponding with sequential control disk 6 respectively
Connect；All gas bombs are vertically fixedly mounted on same in the mounting bracket on ground.
Generally, the operating pressure for the air accumulator installed on automobile is 20Mpa（Volume is usually 60 to 100L）.
When carrying out aerating using above-mentioned gas storage aerating structure, you can when aerating amount is less, using the 3rd class gas bomb 73
To realize aerating at a slow speed；When aerating amount demand is larger, you can using first kind gas bomb 71, the second class gas bomb 72 and the 3rd
Class gas bomb 73 realizes quick recharge jointly, and improves the aerating efficiency and benefit of CNG gas stations whereby.It can be seen that above-mentioned storage
Gas aerating structure disclosure satisfy that the aerating of CNG gas stations meets situation pockety.
Just open and compress when carrying out gas storage using above-mentioned gas storage aerating structure, during natural unsaturated vapor in most gas bombs
Machine 3 to supply each gas bomb, so as to effectively reduce the number of starts of compressor 3, increases the service life.
In addition, all gas bombs are vertically fixedly mounted on the same structure in the mounting bracket on ground so that bottle
It is overall more save CNG gas stations floor space while, reduce the construction tasks of CNG gas stations, shorten CNG gas stations from building
It is set to the time formally used.
During implementation, preferably described mounting bracket is metal framework structure, and has in the mounting bracket and supply each gas storage
The mounting hole that the bottom of bottle is vertically inserted and fixed, each gas bomb bottom plugged and fixed realize fixation in mounting hole.
During implementation, the volume of preferably each gas bomb is 200 to 500L.So, you can meet general CNG aeratings
Stand daily aerating amount.
A kind of PLC sequential control disk automatic control systems of CNG gas stations, including control main frame, the control main frame with
Each switch input unit, switch amount output unit, analog input unit and the analog output unit difference of CNG gas stations
It is connected；Also include installing on each gas bomb is used to measure gas bomb air pressure inside and can outwards export analog signal
Pressure gauge, the pressure gauge is connected with control main frame signal；And a controlled host computer control is provided with every pipeline
Magnetic valve.
The use of above-mentioned PLC sequential controls disk automatic control system, you can each storage is quickly obtained by control main frame
The pressure of gas cylinder, and then control magnetic valve to be inflated gas bomb in time.
As well known to those skilled in the art, switching value refers to the collection and output of noncontinuity signal, including state-signal collection and
Remote control output.It has 1 and 0 two states, and this is the switching behavior in digital circuit, and refer on electric power circuit on and off or
It is switching on and off for contact that person, which says,；The folding of each magnetic valve, relay is switching value in CNG gas stations.Analog quantity is
Refer to amount of the variable in certain limit consecutive variations；Namely in certain limit（Domain）It is interior to take arbitrary value（In codomain
It is interior）.Digital quantity is discrete amount, rather than consecutive variations amount, several discrete values can only be taken, as binary digit variable can only take two
Individual value；By the pressure value measured by each pressure gauge it is analog quantity in CNG gas stations.
Wherein, the PLC sequential control disks automatic control system of CNG gas stations also includes control slave；Wherein, the control
Main frame includes two main station controllers, and the control slave includes two from station control, single main station controller with it is single from
Station control is corresponded and is connected between each other using cable signal；Each add from station control by cable and the CNG
Each switch input unit, switch amount output unit, the analog input unit at gas station are connected with analog output unit signal.
The PLC sequential control disk automatic control system generally use separate unit control main frames of existing CNG gas stations are being run,
And deadlock situation is difficult to avoid that in the process of running, so as to lose the monitoring function to each instrument of CNG gas stations, easily trigger
Security incident.
CNG gas stations PLC sequential control disks automatic control system of the present utility model when in use, passes through each slave station control
Device processed is defeated to obtain each switch input unit, switch amount output unit, analog input unit and the analog quantity of CNG gas stations
Go out the signal of unit, so, you can gather each electric control gear and instrument in CNG gas stations from station control by each
The status data of table.At the same time, it is each to be connected by communication between station control and corresponding single main station controller, such one
Come, the start and stop that each main station controller can carry out each equipment in output signal control CNG gas stations according to situation are believed with action
Number give from station control, so as to complete the start-up and shut-down control to each equipment.
So the PLC sequential control disks automatic control system of CNG gas stations of the present utility model has two sets of processor systems
System, is run in a manner of the using and the reserved, when main station controller A is run, is worked from station control A, control input output module
Unit, and main station controller B is standby.When main station controller B is run, worked from station control B, control input output module list
Member, and main station controller A is standby.Two processors can be automatically switched and manual switching, considerably increase PLC sequential controls
The safety in utilization and service life of disk automatic control system.
Wherein, the PLC sequential control disks automatic control system of CNG gas stations also includes ups power, the ups power
Power access end is electrically connected by cable and city, and the power output end of the ups power passes through cable and each main station controller
It is connected with from station control.
Using after this optimal technical scheme, you can having civil power using the power storage unit inside ups power（Civil power is
Industrial-frequency alternating current described in us（AC））In the case of store electricity；In the case where civil power powers off, ups power itself can be quick
It is switched to by storage electricity come supplying power for outside, and then improves PLC sequential control disk automatic control system reliabilities of operation.
Wherein, the main station controller is programmable controller.
So, you can utilize programmable controller（English abbreviation：PLC）, possessed is stable and reliable for performance, journey
Sequence writes the advantages of convenient.And when implementing, it is preferred to use Siemens production possesses cost-effective, electromagnetic compatibility
Property strong, the S7-300 Series Programmables of the good advantage of concussion resistibility performance.
Wherein, it is described from station control be any one in programmable controller or interface module.
When being programmable controller from station control, advantageous effects are obtained with main station controller using programmable
The advantageous effects of sequence controller.When being interface module from station control（For example, the interface of the series of Siemens Company IM 153
Module）, then lower with cost, the advantages of clock synchronization and precision reach 1ms timestamp, so as to more help this practicality newly
The PLC sequential control disks automatic control system of the CNG gas stations of type obtains more high control precision and corresponding speed.
Wherein, the PLC sequential control disks automatic control system of CNG gas stations also includes signal distributor；Each switch defeated
Enter unit, switch amount output unit, analog input unit and analog output unit respectively by a cable and the letter
Each corresponding signaling interface on number distributor is connected, and the signal distributor corresponding from station control connects with two again
Mouth is connected.
After above-mentioned signal distributor, each signal can be divided into two by above-mentioned signal distributor, be come with this
Reduce each switch input unit, switch amount output unit, analog input unit and analog output unit and two slave stations
Line amount between controller, simplify connection circuitry, improve the reliability of wiring.
As well known to those skilled in the art, signal distributor is that one kind is widely used in machinery, electric, telecommunications, electric power, stone
The data acquisition in the fields such as oil, chemical industry, steel, sewage disposal, building construction, signal transmit the industrial measurement and controls such as conversion, PLC, DCS
System, for improving the reliability with replenishment system Mo Ni ∣/O pin functions, increase system suitability and site environment.Signal
The mode of connection of distributor is technology as well known to those skilled in the art, and therefore not to repeat here.
Wherein, the PLC sequential control disk automatic control systems of CNG gas stations are additionally included in the cooling tower 4 in CNG gas stations
Outer surface on the vibration detection mechanism of cooling tower 4 installed, the vibration detection mechanism of cooling tower 4 include vibration pickup 44, battery,
Alarm and controller；Vibration pickup 44, battery and the alarm are connected by cable with controller respectively.
Because multiple vibration sources are provided with cooling tower 4（Such as：Blower fan 41, water supply pump 42 and spray pump 43）, and in order to
Strengthen cooling effect, the cooling tower 4 set in each CNG gas stations is essentially arranged side by side two.So, i.e., in cooling tower
During 4 operation, the common vibration of each blower fan 41, water supply pump 42 and water pump of spraying water forms resonance, and increase cooling tower 4 is overall to shake
Traverse degree.Again because having at least two tie points between the air delivering pipeline of cooling tower 4 and CNG gas stations, above-mentioned vibration it is long and
Long is the loosening for causing tie point, so as to trigger the security incident of leakage.
Based on above-mentioned background, the vibration detection mechanism of cooling tower 4 when in use, cooling tower 4 is measured by vibration pickup 44
Vibration（Vibration pickup 44 is a kind of vibration-measuring sensor, is that a kind of will vibrate is transformed into the device of corresponding electric signal）.And controlling
The alarm threshold value of a vibration pickup 44 is set in device, when vibration pickup 44 detects that vibration values send signal more than or equal to alarm threshold value
Alarm equipment alarm is controlled to controller, so as to remind the staff at scene, weakening processing need to be carried out to cooling tower 4 as early as possible,
To lift the operational reliability of CNG gas stations.
During implementation, the alarm is audible-visual annunciator, and the controller is single-chip microcomputer.
So, audible-visual annunciator can cause the timely note of field personnel by the form of sound and light
Meaning, it is ensured that the effect of alarm.The structure of single-chip microcomputer is simple, reliable, is set using more convenient.
During implementation, the battery is battery；The vibration detection mechanism of cooling tower 4 also includes generator, the generating
The rotating shaft of machine is connected with the output shaft driving of any one motor on cooling tower 4, and the sending end of the generator passes through cable
It is connected with the controller and for being transmitted electricity to the battery.
So, that is, make it that the vibration detection mechanism of cooling tower 4 is preferably synchronous with the operation of cooling tower 4, and make good use of
The power source of cooling tower 4 carrys out self-generating, saves cable amount used in the vibration detection mechanism of cooling tower 4.
Wherein, the PLC sequential control disks automatic control system of CNG gas stations also includes compressor cooling control system, institute
Stating compressor cooling control system includes the liquid level sensor 9 in the cistern of the interior bottom portion of cooling tower 4, the liquid level
The terminals of sensor 9 are connected by cable with control main frame signal；It is installed with cooling tower 4 in cooling tower 4
The feed pipe that the cistern of portion bottom supplies water, magnetic valve is installed with the feed pipe, the terminals of the magnetic valve lead to
Cable is crossed with control main frame signal to be connected.
The cooling system of compressor 3 includes cooling tower 4, and cooling coil pipe, the cooling are internally provided with the cooling tower 4
It is respectively positioned on the input port and delivery outlet of coil pipe outside cooling tower 4, and the input port and the delivery outlet of compressor 3 seal phase
Even, the delivery outlet is connected with the input port sealing of high pressure dehydration device 5.
Cooling tower 4 is used for the high-temperature natural gas after the pressurization compression of compressor 3（70 degree or so）Cooled down, prevent because
The metering for each measuring instrument installed in CNG gas stations caused by expanding with heat and contract with cold has error.So use of cooling tower 4
It is able to ensure that the metering for each measuring instrument installed in CNG gas stations is more accurate.
After above-mentioned compressor cooling control system, the interior bottom portion of cooling tower 4 can be detected by liquid level sensor 9
Cistern in liquid level depth, and then be signaled to control main frame in low water level and carry out opens solenoid valve so that for
Water pipe supplies water to cistern.The long-term cooling effect for ensuring compressor 3, improve the security reliability of CNG gas stations operation.
Wherein, the liquid level sensor 9 be arranged at that the cistern depth direction is in high school at low three for distribution three.
Above three liquid level sensor 9 can not only improve the reliability for cistern water level monitoring（Prevention is using
Single liquid level sensor 9, the liquid level sensor 9 break down, and cause the situation that can not monitor water level to occur）；It can also pass through
Three liquid level sensors 9 can easily make it that the control of cooling tower 4 is more accurate reliable, be in high position for example, working as
When liquid level sensor 9 sends signal, then control main frame supplies water to the blackout of liquid level sensor 9 to solenoid signal；But work as
When being in two liquid level sensors 9 of high and middle position and sending signal, then mean to be possible to that magnetic valve is bad or the confession of feed pipe
Water source disconnects, and need to overhaul in time；When being in three liquid level sensors 9 that are high, neutralizing lower position, then need to send urgent report in time
Signal is warned to carry out rapid rush-repair.To sum up, it can be seen that the setting of three liquid level sensors 9, enable to the cooling system of compressor 3
The operation of system is safer reliable.
Wherein, the PLC sequential control disks automatic control system of CNG gas stations also allocates mechanism automatically including aerating source, institute
Stating aerating source and allocating mechanism automatically includes the first control valve, the second control valve, traffic flow detecting device 10 and control main frame；It is described
First control valve, the second control valve, traffic flow detecting device 10 are connected with the control main frame signal respectively；
First control valve is sealingly mounted on the connecting pipe between the air supply opening of filling machine 8 and sequential control disk 6,
Second control valve is sealingly mounted on the connecting pipe between the air supply opening and gas bomb of filling machine 8；The vehicle flowrate inspection
Device 10 is surveyed to be arranged in CNG gas stations and for detecting vehicle flowrate.
After allocating mechanism automatically using above-mentioned aerating source, detected using traffic flow detecting device 10 in CNG gas stations
Vehicle flowrate, and then judge whether aerating meets uniform.
If vehicle flowrate is more consistent in the data of unit interval（For example, continuous 3 times, it is more than 4 within every 20 minutes）Then judge
For the more uniform saturation of aerating of CNG gas stations, also demonstrate that now aerating vehicle is more, then control main frame provides the first control valve
Open, the control signal that the second control valve is closed, so as to carry out quick recharge by compressor 3 come direct-furnish filling machine 8, improve
The aerating efficiency of CNG gas stations, phenomena such as avoiding aerating queuing or trailer disconnection substation from dying, it is ensured that CNG gas stations are just
Normal Effec-tive Function.
If vehicle flowrate is more inconsistent in the data of unit interval, it is judged as that the aerating load of CNG gas stations is smaller, this
When the high-pressure natural gas that stores in advance of gas bomb meet aerating requirement, reduce the number of starts of compressor 3, extend compressor 3
Service life.
Wherein, the traffic flow detecting device 10 is any one in infrared sensor or ultrasonic device.
CNG gas stations are high-risk area, and the side of vehicle flowrate in CNG gas stations is detected using infrared sensor or ultrasonic device
Formula, thermal source will not be produced, securely and reliably.
Wherein, the traffic flow detecting device 10 is fixedly mounted on entrance or the outlet of CNG gas stations using support bar
Place.
Generally only it is available for single unit vehicle to come in and go out at the import or export of CNG gas stations, therefore a set of vehicle flowrate is set here
Detection means 10 is to be capable of the vehicle flowrate of accurately measure disengaging CNG gas stations, it is ensured that the degree of accuracy of wagon flow measurement it is same
When, the installation cost of reduction traffic flow detecting device 10.
It the above is only the utility model preferred embodiment, need to point out not departed from for those skilled in the art
On the premise of the technical program, several modifications and improvements can also be made, the technical scheme of above-mentioned modification and improvement should be regarded equally
For fall into this application claims scope.
Claims (10)
1.CNG gas stations, including compressor, high pressure dehydration device, sequential control disk, caisson and filling machine；The compression
The air inlet of machine is used to be connected with gas source sealing, and the gas outlet of the compressor passes through pipeline and the high pressure dehydration device
Import be connected, the outlet of the high pressure dehydration device is connected by pipeline with the infeed mouth of sequential control disk, the order control
The output port of disk processed is individually connected between the input port of the gas bomb and the air supply opening of filling machine by pipeline respectively, and
It is connected between the delivery outlet of the gas bomb and the air supply opening of the filling machine by seal for pipe joints；It is characterized in that：
The caisson is gas bomb, and the gas bomb includes being that volume is equal and the cylindrical circular first kind of profile is stored up
Gas cylinder, the second class gas bomb and the 3rd class gas bomb, wherein, after the storage of each first kind gas bomb is full air pressure inside be 25Mpa extremely
23Mpa, air pressure inside is 24Mpa to 22Mpa after each second class gas bomb storage is full, internal after each 3rd class gas bomb storage is full
Air pressure is 23Mpa to 20Mpa；The bottle number ratio of the first kind gas bomb, the second class gas bomb and the second class gas bomb is 1:2:
3；Each gas bomb is connected by pipeline interface corresponding with sequential control disk respectively；All gas bombs are vertically solid
Dingan County is fixedly installed in the mounting bracket on ground mounted in same.
2. a kind of PLC sequential control disk automatic control systems for CNG gas stations according to claim 1, including control
Main frame processed, the control main frame and each switch input unit, switch amount output unit, the analog input list of CNG gas stations
Member and analog output unit are respectively connected with；It is characterized in that：Also include installing on each gas bomb is used for measurement storage
Gas cylinder internal air pressure and the pressure gauge that can outwards export analog signal, the pressure gauge are connected with control main frame signal；It is and every
The magnetic valve of a controlled host computer control is provided with root pipeline.
3. PLC sequential controls disk automatic control system according to claim 2, it is characterised in that：Also include control slave；
Wherein, the control main frame includes two main station controllers, and the control slave includes two from station control, single main website control
Device processed with it is single from station control correspond and be connected between each other using cable signal；Each pass through cable from station control
Each switch input unit, switch amount output unit, analog input unit and analog output list with the CNG gas stations
First signal is connected.
4. PLC sequential controls disk automatic control system according to claim 3, it is characterised in that：Also include ups power,
The power access end of the ups power is electrically connected by cable and city, the power output end of the ups power by cable with it is each
Individual main station controller is connected with from station control.
5. PLC sequential controls disk automatic control system according to claim 3, it is characterised in that：The main station controller
For programmable controller.
6. PLC sequential controls disk automatic control system according to claim 3, it is characterised in that：It is described from station control
For any one in programmable controller or interface module.
7. PLC sequential controls disk automatic control system according to claim 3, it is characterised in that：Also include signal to distribute
Device；Each switch input unit, switch amount output unit, analog input unit and analog output unit pass through one respectively
Cable is connected with each corresponding signaling interface on the signal distributor, and the signal distributor is again with two from stand control
Corresponding interface is connected on device.
8. PLC sequential controls disk automatic control system according to claim 3, it is characterised in that：It is additionally included in CNG aeratings
The cooling tower vibration detection mechanism installed on the outer surface for the cooling tower stood, the cooling tower vibration detection mechanism include pick-up
Device, battery, alarm and controller；The vibration pickup, battery and alarm are connected by cable with controller respectively.
9. PLC sequential controls disk automatic control system according to claim 3, it is characterised in that：It is cold also to include compressor
But control system, the compressor cooling control system include the level sensing in the cistern of cooling tower interior bottom portion
Device, the terminals of the liquid level sensor are connected by cable with control main frame signal；Be installed with cooling tower for
The feed pipe that the cistern of cooling tower interior bottom portion supplies water, magnetic valve is installed with the feed pipe, the magnetic valve
Terminals are connected by cable with control main frame signal.
10. PLC sequential controls disk automatic control system according to claim 9, it is characterised in that：The liquid level sensor
Be arranged at that the cistern depth direction is in high school at low three for distribution three.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720277645.9U CN206754798U (en) | 2017-03-21 | 2017-03-21 | CNG gas stations and its PLC sequential control disk automatic control systems |
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| CN201720277645.9U CN206754798U (en) | 2017-03-21 | 2017-03-21 | CNG gas stations and its PLC sequential control disk automatic control systems |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107902277A (en) * | 2017-12-16 | 2018-04-13 | 天津市禾厘油气技术有限公司 | A kind of new chemical pharmacy jar |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107902277A (en) * | 2017-12-16 | 2018-04-13 | 天津市禾厘油气技术有限公司 | A kind of new chemical pharmacy jar |
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