CN206618549U - Detect the equipment and online monitoring system of the seal of gas station's closed system - Google Patents
Detect the equipment and online monitoring system of the seal of gas station's closed system Download PDFInfo
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- CN206618549U CN206618549U CN201720380870.5U CN201720380870U CN206618549U CN 206618549 U CN206618549 U CN 206618549U CN 201720380870 U CN201720380870 U CN 201720380870U CN 206618549 U CN206618549 U CN 206618549U
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Abstract
It is related to the equipment and on-line monitoring system for oil gas recovery of gas station of detection gas station's closed system seal.For the equipment for the seal for detecting gas station's closed system, it can include：Acquiring unit, for according to setpoint frequency obtain the gas station stop fueling operation multiple periods in at the beginning of predetermined detection duration between and the end time corresponding oil-air pressure of difference；Computing unit, for calculating the fall off rate from each time started to the corresponding oil-air pressure of corresponding end time；Identifying unit, for judging whether the fall off rate exceedes predetermined threshold, and records the number of times that the fall off rate exceedes the predetermined threshold in the predetermined early warning period；Alarm unit, the number of times for the fall off rate in response to record more than the predetermined threshold in the predetermined early warning period exceedes threshold value of warning, and generation causes the signal for sending early warning.
Description
Technical field
The utility model is related to the oil and gas detection of gas station, the more particularly to seal for detecting gas station's closed system
Equipment and gas station oil gas reclaim on-line monitoring (monitoring) system.
Background technology
In the seal detection for gas station of prior art, often require that before testing in 3 hours or in inspection
There should not be emptying operation during survey, it is necessary to using nitrogen, and need before detection starts to stop gas station's fueling operation etc.,
To carry out seal monitoring.In the detection process of prior art, 500Pa is forced into gas recovery system for oil with nitrogen, permitted
Perhaps system has decline of pressure.Residual compression value after 5 minutes is compared with prespecified least residue pressure limit, if
Less than limit value, then show that system leak degree exceeds allowed band.
Above-mentioned existing detection technique have impact on the normal fueling operation of gas station, and nitrogen is also used in addition, cause inspection
Survey both inconvenient or influence gas station work.In addition, in the detecting system of prior art, before detection work starts, it is necessary to
Oil gas in oil tank is first vented, nitrogen is re-filled with and is detected, emptying oil gas causes one side the waste of oil gas, the opposing party
Cause the pollution of environment in face.
Therefore, urgently there is the improvement requirement detected for gas station's seal in the prior art.
Utility model content
According to a kind of one side of the present utility model setting there is provided seal for being used to detect gas station's closed system
It is standby, it can include：Acquiring unit, for according to setpoint frequency obtain gas station stop fueling operation multiple periods in
Distinguish corresponding oil-air pressure with the end time between at the beginning of predetermined detection duration；Computing unit, is opened for calculating from each
Fall off rate of time beginning to the corresponding oil-air pressure of corresponding end time；Identifying unit, for judging whether fall off rate surpasses
Predetermined threshold is crossed, and records the number of times that fall off rate exceedes predetermined threshold in the predetermined early warning period；Alarm unit, for responding
The number of times for exceeding predetermined threshold in the predetermined early warning period in the fall off rate of record exceedes threshold value of warning, and generation, which is caused, sends pre-
Alert signal.
In one embodiment of the present utility model, where it is determined that unit also records the continuous occurrence number of early warning, and work as
When the continuous occurrence number of early warning exceedes alarm threshold value, indicate that alarm unit sends the signal of alarm.
In another embodiment of the present utility model, when wherein setpoint frequency scope includes obtaining one time per 1-120 seconds
Between data and corresponding oil-air pressure, predetermined detection duration scope include 2-20 minute, during predetermined early warning segment limit include 12-
Within 120 hours, the number of times that threshold value of warning scope is included in the predetermined early warning period more than predetermined threshold accounts for the predetermined early warning period
In total 10%-90% for exceeding number of times, alarm threshold value scope includes interior early warning occur in 24-720 hour.
In further embodiment of the present utility model, wherein setpoint frequency scope includes obtaining a time number in every 10 seconds
According to corresponding oil-air pressure, predetermined detection duration scope include 5 minutes, during predetermined early warning segment limit include 24 hours within,
The number of times that threshold value of warning scope is included in the predetermined early warning period more than predetermined threshold is accounted in the predetermined early warning period always more than number of times
25%, alarm threshold value scope include 120 hours in there is early warning.
In another embodiment of the present utility model, wherein calculate in time transverse axis and the oil-air pressure longitudinal axis from each
Time started corresponding oil-air pressure is to the straight slope of oil-air pressure institute shape corresponding with each end time.
In one embodiment of the present utility model, wherein predetermined threshold is according to National Standard of the People's Republic of China
GB20952-2007 is closed on gas station's atmosphere pollutants emission standardses or according to Beijing provincial standard DB11/208-2010
Set in gasoline station oil gas discharge control and limitation standard.
According to second aspect of the present utility model there is provided a kind of on-line monitoring system for oil gas recovery of gas station, including it is upper
The equipment for being used to detect the seal of gas station's closed system stated.
Returned by means of the equipment and gas station oil gas of the present utility model for being used to detect the seal of gas station's closed system
Online monitoring system is received, can be in the case where gas station's fueling operation need not be stopped, it is not necessary to using nitrogen, it is possible to even
It is continuous repeatedly to obtain the oil-air pressure at the corresponding time according to setpoint frequency, by calculating corresponding oil-air pressure fall off rate, with
Predetermined threshold is compared, and early warning or alarm are sent in the case where meeting some requirements.According to the utility model various aspects
Device for the seal that detects gas station's closed system, the method for the seal for detecting gas station's closed system, use
It is easy to use in the equipment and on-line monitoring system for oil gas recovery of gas station of the seal of detection gas station's closed system, it is to avoid
Influence in the prior art for gas station's fueling operation, inspection next time after being detected in addition present in prior art in last time
The defect that (even several years usual several weeks) can not be monitored in long period before survey is overcome, and is realized for adding
The on-line real-time measuremen of petrol station gas recovery system for oil, realizes the purpose of automation, with very high practical value and business
Value.
Brief description of the drawings
Fig. 1 diagrammatically illustrates the seal for being used to detect gas station's closed system according to the utility model one side
Device；
Fig. 2 is diagrammatically illustrated according to the utility model other side for detecting the closed of gas station's closed system
The equipment of property.
Embodiment
Below in conjunction with the accompanying drawings, it is described in detail for each embodiment of the present utility model.
Fig. 1 is diagrammatically illustrated according to the utility model one side for detecting the closed of gas station's closed system
The device 10 of property, can include：Oil tank 1；Fuel charger 2；For the pipeline 3 for being connected oil tank 1 with fuel charger 2, wherein oil tank 1,
Fuel charger 2 and pipeline 3 constitute closed system.Gasoline, diesel oil or other fuel oils can be stored in oil tank 1.In these fuel oils by
There is volatile additive to strengthen the combustion characteristics of fuel oil or to reach corresponding environmental protection standard in the addition of many, because
This there are certain oil-air pressure in the closed system that oil tank 1, fuel charger 2 and pipeline 3 are constituted.These oil gas 8 include
Fuel oil-gas, additive of volatilization etc., these oil gas 8 constitute saturation system with the fuel oil in oil tank 1.In order to ensure closed system
The airtight performance of system is, it is necessary to which the oil-air pressure of the oil-air pressure, particularly tank inside in on-line real-time measuremen closed system, no
Then substantial amounts of oil gas leakage, on the one hand causes environmental pollution, on the other hand causes many potential safety hazards.
The term " seal of detection gas station's closed system " mentioned in each embodiment of the present utility model is generally
Refer to monitoring the oil and gas leakage of gas station.
Therefore, according to the device 10 for being used to detect the seal of gas station's closed system of the utility model one embodiment
The sensor 4 coupled with oil tank 1 can also be included, such as baroceptor or differential pressure pick-up commonly used in the art are used for
Oil-air pressure inside continuous detection oil tank 1.According to the utility model one embodiment for detecting gas station's closed system
Seal device 10 can also include memory 5, the oil-air pressure detected for storing by sensor 4 and it is corresponding when
Between.These oil-air pressures and corresponding time can be to be stored in the form of computer code on memory 5.This area skill
Art personnel should be understood that existing many sensors equally have the function of data storage, need what is stored in mass data
In the case of, these data will be transferred storage in the memory 5.
In one embodiment, the device 10 of the seal for detecting gas station's closed system can also include processor
6, above-mentioned computer code can be configured as causing processor 6 to obtain according to setpoint frequency when performing on processor 6
Gas station stop fueling operation multiple periods in at the beginning of predetermined detection duration between and end time difference it is corresponding
Oil-air pressure；Calculate from each time started to the fall off rate of the corresponding oil-air pressure of corresponding end time；Judge lower reduction of speed
Whether rate exceedes predetermined threshold, and records the number of times that fall off rate exceedes predetermined threshold in the predetermined early warning period；In response to note
The fall off rate of record exceedes threshold value of warning in the predetermined early warning period more than the number of times of predetermined threshold, and generation, which is caused, sends early warning
Signal.
On it is above-mentioned " processor 6 according to setpoint frequency obtain gas station stop fueling operation multiple times
Distinguish corresponding oil-air pressure with the end time between at the beginning of Duan Zhongyu predetermined detection durations ", it is necessary to which explanation, such as exist
In the period of 1 day or 24 hours, the work that the oil gun (not shown) in multiple all fuel chargers does not all refuel there are
Gap, in these working clearances, processor 6 can for example be obtained once according to setpoint frequency per 1-120 seconds, or often
Obtain once within 10 seconds, come obtain it is being stored in memory 5, in these multiple working clearances that gas station stops fueling operation it is pre-
Regular inspection is surveyed in duration, such as in 2-20 minutes or preferred 5 minutes, with time started and the end time corresponding oil gas of difference
Pressure.Such as n-th period working clearance continue for 6 minutes, and all fuel chargers are in free time, processing in this 6 minutes
Device 6 can obtain setpoint frequency once according to every 10 seconds and make a reservation for obtain 5 minutes in the working clearance stored in memory 5
Start within the 1st minute corresponding oil-air pressure in detection duration and terminate corresponding oil-air pressure with the 5th minute.Such as (n+1)th
Period working clearance continue for 8 minutes, and all fuel chargers are in the free time in this 8 minutes, and processor 6 can be according to every 10
Second obtains setpoint frequency once to obtain in the working clearance stored in memory 5 the 1st point in 5 minutes predetermined detection durations
Clock starts corresponding oil-air pressure and terminated corresponding oil-air pressure with the 5th minute.Such as the n-th+2 periods working clearance hold
Continue 10 minutes, all fuel chargers are in the free time in this 10 minutes, processor 6 can obtain setting once according to every 10 seconds
Determine frequency and start corresponding oil to obtain the 1st minute in 5 minutes predetermined detection durations in the working clearance stored in memory 5
Atmospheric pressure and terminated corresponding oil-air pressure with the 5th minute.The duration of working clearance above-mentioned is to the actual work in gas station
Make the record of situation, it is possible to which the duration of working clearance is 1 minute, 5 minutes, 8 minutes etc..Above-mentioned setpoint frequency and predetermined
Detection duration is all can be according to actual conditions or adjustable according to the Stringency of examination criteria.
It can just be obtained once because setpoint frequency is every 1-120 seconds, and during predetermined detection in these working clearances
Length can be selected from 2-20 minutes, so fast setpoint frequency and so short predetermined detection duration, it is ensured that almost
Each working clearance can get corresponding time data and oil-air pressure data, it is ensured that the purpose of real-time continuous detection.
Alternative, wherein closed system can also include blow-down pipe 9 and the processing unit 12 connected with oil tank 1, such as in Fig. 1
Shown in.One end of blow-down pipe 9 is connected with oil tank 1, and the other end of blow-down pipe 9 can be provided with pressure/vacuum 11, pressure
Power/vacuum valve 11 can adjust the inside and outside differential pressure of oil tank 1 and make the valve that gas is communicated inside and outside oil tank 1.For example in oil tank 1
When oil-air pressure is between -2000Pa to 1500Pa, pressure/vacuum 11 now is closed.Oil in oil tank 1
When atmospheric pressure is less than -2000Pa, now the one-way conduction of pressure/vacuum 11, now illustrates that the oil-air pressure of oil tank 1 is too low, is
The consideration of security, outside air will be sucked in oil tank 1 via pressure/vacuum 11.Oil-air pressure in oil tank 1 is more than
During 1500Pa, now the opposite direction of pressure/vacuum 11 is turned on, and now illustrates that the oil-air pressure of oil tank 1 is too high, for the purposes of safety
Part oil gas in the consideration of property, oil tank 1 will exclude oil tank 1 via pressure/vacuum 11.In addition, processing dress above-mentioned
Put 12 and be referred to as being oil-gas emission treatment device, what the oil-gas emission treatment device was discharged for oil tank 1 via blow-down pipe 9
Oil gas, the device recycled by using methods such as absorption, absorption, condensation, UF membranes to the oil gas of this partial discharge.
The blow-down pipe 9 used, pressure/vacuum 11 and processing unit 12 in each embodiment of the present utility model are all this areas
Device known to technician, will not be described in detail herein.
" calculating from each time started to the fall off rate of the corresponding oil-air pressure of corresponding end time " above-mentioned,
It should be noted that processor 6 can calculate the fall off rate of the correspondence oil-air pressure from such as time started to the end time, will
Obtained fall off rate is calculated every time to be compared with predetermined threshold.Opened for example, processor 6 can be calculated from such as the 1st minute
The fall off rate of the end time correspondence oil-air pressure terminated between at the beginning of beginning by the 5th minute, the lower reduction of speed that calculating is obtained
Rate is compared with predetermined threshold.The predetermined threshold mentioned in each embodiment of the present utility model can be the Chinese in
People republic national standard《GB20952-2007》In set on gas station's atmosphere pollutants emission standardses, or basis
Beijing's provincial standard《DB11/208-2010》In on gasoline station oil gas discharge control and limitation standard set, can also
It is to be set according to other local standards, such as Tianjin, Shanghai etc., this point are reason of being not difficult for those skilled in the art
Solution.In each embodiment of the present utility model, processor 6 also continues to judge whether fall off rate exceedes predetermined threshold, and
Record the number of times that fall off rate exceedes predetermined threshold in the predetermined early warning period.If it is determined that fall off rate is more than predetermined threshold,
Then continue to judge that whether fall off rate is more than the number of times of predetermined threshold more than threshold value of warning, such as threshold value of warning scope is included in pre-
Determine the number of times in the early warning period more than predetermined threshold and account for total 10%-90% for exceeding number of times in the predetermined early warning period.Processor 6 is also
It is configured to number of times of the fall off rate of record more than predetermined threshold in the predetermined early warning period and exceedes threshold value of warning, generation
Cause the signal for sending early warning.
Alternative, calculating includes from each time started to the fall off rate of the corresponding oil-air pressure of corresponding end time：
In calculating time transverse axis and the oil-air pressure longitudinal axis from oil-air pressure corresponding with each time started to each end time pair
The straight slope of oil-air pressure institute shape answered.
Summarize, setpoint frequency scope above-mentioned can include obtaining a time data per 1-120 seconds and right
The oil-air pressure answered, predetermined detection duration scope can include 2-20 minutes, and segment limit can include 12-120 during predetermined early warning
Within hour, the number of times that threshold value of warning scope can be included in the predetermined early warning period more than predetermined threshold accounts for the predetermined early warning period
In total 10%-90% for exceeding number of times, alarm threshold value scope can include interior early warning occur in 24-720 hour.
Alternative, setpoint frequency scope can include obtaining a time data and corresponding oil-air pressure in every 10 seconds, in advance
Regular inspection, which surveys duration scope, to be included 5 minutes, and within segment limit can include 24 hours during predetermined early warning, threshold value of warning scope can
Account for total more than the 25% of number of times in the predetermined early warning period to be included in the number of times in the predetermined early warning period more than predetermined threshold, alarm
Threshold range can include early warning occur in 120 hours.
On predetermined threshold, it is necessary to illustrate, such as in National Standard of the People's Republic of China《GB20952-2007》
In on the table 2 in gas station's atmosphere pollutants emission standardses to give the detection of oil gas recovery system of gas station seal minimum surplus
Remaining pressure limit, such as in the case of being 37850L in gas of oil storage tank space, when nozzle is 1-6, the minimum after 5 minutes is remained
Remaining pressure limit is 473Pa, is (500-473)/5 according to the fall off rate of the oil-air pressure of National Standard of the People's Republic of China
=5.4.In each embodiment of the present utility model, for parameter oil-gas space, can using average ullage volumetric spaces come
Instead of this average ullage volumetric spaces can be set as a steady state value, so as to calculating below.For example, can set flat
Equal ullage volumetric spaces are 37850L.As described above, may be set in nozzle for 1-6 when, predetermined threshold set
For (500-473)/5=5.4.When nozzle is 7-12, predetermined threshold is set as (500-473)/5=5.4.In nozzle
For 13-18 when, predetermined threshold is set as (500-471)/5=5.8.When nozzle is 19-24, predetermined threshold is set as
(500-468)/5=6.4.When nozzle is more than 24, predetermined threshold is set as (500-468)/5=6.4.It is above-mentioned to provide
Predetermined threshold is with reference to National Standard of the People's Republic of China《GB20952-2007》Setting, for different national standards or
Person's regional standard, this predetermined threshold is also different, and this point is understandable for those skilled in the art.
For judging whether fall off rate exceedes predetermined threshold, it is necessary to which explanation, such as setting average ullage volume
Space is 37850L, when nozzle is 1-6, and predetermined threshold is set as (500-473)/5=5.4, and this point is above
Mention, if processor 6 is judged from oil-air pressure corresponding with the time started to oil-air pressure institute corresponding with end time shape
Straight slope is more than 5.4, then it is assumed that fall off rate has been above predetermined threshold, then processor 6 will also continue to judge to cut
Only fall off rate is more than whether the number of times of predetermined threshold exceedes in the predetermined early warning period (such as 24 hours) more than pre- so far
Determine the threshold value of warning of threshold value total degree.Always exceed in for example when fall off rate is small more than such as 24 more than the number of times of predetermined threshold
During the threshold value of warning of number of times, processor 6 can indicate that alarm device 7 sends pre-warning signal.This threshold value of warning scope can be
20%-30%.For example, processor 6 judges 0 from one day:Start to 24 within 00 minute：At the end of 00 last minute, lower reduction of speed
The number of times that rate is more than predetermined threshold accounts for 40% of total judgement number of times in one day (24 hours), then processor 6 indicates that alarm device 7 is sent out
Go out pre-warning signal.If processor 6 judges 0 from one day:Start to 24 within 00 minute：At the end of 00 last minute, lower reduction of speed
The number of times that rate is more than predetermined threshold accounts for 15% of total judgement number of times in one day (24 hours), then does not send pre-warning signal.
Processor 6 is further configured to record the continuous occurrence number of early warning, and exceedes report in response to the continuous occurrence number of early warning
Alert threshold value, generation causes the signal for sending alarm.For example, all having there is early warning when continuous 5 days (such as 120 hours), then recognize
For more than alarm threshold value, processor 6, which is generated, causes the signal for sending alarm.
Schematical description is shown above, in each scope given by the utility model, such as setting frequency
Segment limit, threshold value of warning scope, alarm threshold value scope etc., this area skill when rate scope, predetermined detection duration scope, predetermined early warning
Art personnel can combine specific reality according to these scopes and be selected accordingly.
It is described in detail above for the device of the seal for detecting gas station's closed system.Below
By general description once it is of the present utility model other aspect, for simplicity, with above repeat part, repeat no more.
Fig. 2 diagrammatically illustrates a kind of equipment 30 for being used to detect the seal of gas station's closed system, can include：Obtain
Take unit 31, for according to setpoint frequency obtain gas station stop fueling operation multiple periods in predetermined detection duration
At the beginning of between and the end time distinguish corresponding oil-air pressure；Computing unit 32, for calculating from each time started to phase
Answer the fall off rate of the corresponding oil-air pressure of end time；Identifying unit 33, for judging whether fall off rate exceedes predetermined threshold
Value, and record the number of times that fall off rate exceedes predetermined threshold in the predetermined early warning period；Alarm unit 34, in response to record
Number of times of the fall off rate more than predetermined threshold in the predetermined early warning period exceed threshold value of warning, generation causes the letter that sends early warning
Number.
Alternative, identifying unit 33 also records the continuous occurrence number of early warning, and when the continuous occurrence number of early warning exceedes report
During alert threshold value, indicate that alarm unit 34 sends the signal of alarm.
Equally, setpoint frequency scope can include obtaining a time data and corresponding oil-air pressure per 1-120 seconds, in advance
Regular inspection, which surveys duration scope, to be included 2-20 minutes, within segment limit includes 12-120 hours during predetermined early warning, threshold value of warning scope bag
Include the number of times more than predetermined threshold in the predetermined early warning period and account for total 10%-90% for exceeding number of times, report in the predetermined early warning period
Alert threshold range includes early warning occur in 24-720 hours.Alternative, when setpoint frequency scope was obtained one time including every 10 seconds
Between data and corresponding oil-air pressure, predetermined detection duration scope include 5 minutes, during predetermined early warning segment limit include 24 hours with
Interior, the number of times that threshold value of warning scope is included in the predetermined early warning period more than predetermined threshold accounts for total more than secondary in the predetermined early warning period
Several 25%, alarm threshold value scope includes early warning occur in 120 hours.
Alternative, wherein calculating the fall off rate bag from each time started to the corresponding oil-air pressure of corresponding end time
Include：In calculating time transverse axis and the oil-air pressure longitudinal axis from oil-air pressure corresponding with each time started to each end time
The straight slope of corresponding oil-air pressure institute shape.
Alternative, wherein predetermined threshold is on gas station according to National Standard of the People's Republic of China GB20952-2007
Atmosphere pollutants emission standardses or according to Beijing provincial standard DB11/208-2010 on gasoline station oil gas discharge control and
Limitation standard and set.
Also a kind of on-line monitoring system for oil gas recovery of gas station of the utility model, including above-mentioned be used to detect that gas station is close
Close the device or the above-mentioned method for being used to detect the seal of gas station's closed system of the seal of system or above-mentioned
Be used for detect gas station's closed system seal equipment.
By each embodiment of above-mentioned design, it can be not required in the case where gas station's fueling operation need not be stopped
Use nitrogen, it is possible to which continuous several times obtain the oil-air pressure at the corresponding time according to setpoint frequency, it is corresponding by calculating
Oil-air pressure fall off rate, is compared with predetermined threshold, and early warning or alarm are sent in the case where meeting some requirements.Advantage is also
It is, it is easy to use, it is to avoid influence in the prior art for gas station's fueling operation, realize and returned for gas station oil gas
The on-line real-time measuremen of receipts system, realizes the purpose of automation, with very high practical value and commercial value.
It should be noted that the term " comprising " used in each embodiment of the present utility model is not construed as only
Including its implication is not restricted, such as closed system includes the pipeline of both oil tank, fuel charger and connection, is not intended to limit
Only include the pipeline of both oil tank, fuel charger and connection for closed system, other parts and element can also be included, for example
Closed system can also include blow-down pipe and processing unit etc., and this wants these parts and element and oil tank, fuel charger and is connected
Both pipelines constitute closed system and are just also contained in protection domain of the present utility model, this point those skilled in the art
It will be understood by.
Further need exist for, it is noted that the technical scheme proposed in the utility model can be realized using software form,
It can be realized, can also be realized using the combination of software and hardware using hardware mode.
In the case where being realized using software form, acquiring unit, computing unit, identifying unit and alarm unit each may be used
To be implemented as the software module of corresponding function, such as instruction of computer code form or instruction set.
In the case where being realized using hardware mode, acquiring unit, computing unit, identifying unit and alarm unit each may be used
Being realized for realizing the hardware unit of corresponding function, such as electronic circuit, logic unit, application specific integrated circuit, scene
Programmable gate array, microprocessor, digital signal processor etc..According in an embodiment of the present utility model, obtain
Unit for example can be pressure checking device, such as pressure sensor；Computing unit can for example pass through subtracter and divider
Combination realize that wherein subtracter is used to obtain the oil gas pressure between time started and the oil-air pressure value of corresponding end time
Power is poor, and the oil-air pressure difference value corresponding with predetermined detection duration that divider is used to obtain subtracter is divided by, to obtain correspondence
The fall off rate of oil-air pressure；Identifying unit can for example realize that this compares by the combination of a comparator and counter
Device compares fall off rate with predetermined threshold, and counter is counted to the number of times that fall off rate is more than predetermined threshold；Warning
Unit, for example, can be realized by signal generator, for example, can produce the voltage/current signals hair of predetermined voltage or electric current
Raw device, when the count value in counter exceedes predetermined threshold, provides a control signal, to cause the signal to signal generator
Generator produces and can indicate to send the signal of early warning.
In the case where being combined using software and hardware, software module shape can be referred to using above-mentioned according to needs are applied
Formula come realize the part of functions in embodiment of the present utility model operate, and realized using hardware unit another part behaviour
Make, can also partly use software module form for One function operation, partly realized using hardware unit form.
Although describing the utility model by reference to the embodiment being presently contemplated that, it should be appreciated that the utility model
It is not limited to the disclosed embodiments.On the contrary, the utility model be intended in spirit and scope of the appended claims it is included
Various modifications and equivalent arrangements.The scope of following claims meets most broad interpretation, to include all such modifications
And equivalent structure and function.
Claims (7)
1. a kind of equipment for being used to detect the seal of gas station's closed system, it is characterised in that including：
Acquiring unit, for being obtained according to setpoint frequency in multiple periods that the gas station stops fueling operation with making a reservation for
Distinguish corresponding oil-air pressure with the end time between at the beginning of detection duration；
Computing unit, for calculating the fall off rate from each time started to the corresponding oil-air pressure of corresponding end time；
Identifying unit, for judging whether the fall off rate exceedes predetermined threshold, and records the fall off rate predetermined pre-
Exceed the number of times of the predetermined threshold in the alert period；
Alarm unit, time for the fall off rate in response to record in the predetermined early warning period more than the predetermined threshold
Number exceedes threshold value of warning, and generation causes the signal for sending early warning.
2. the equipment according to claim 1 for being used to detect the seal of gas station's closed system, wherein described judge single
Member also records the continuous occurrence number of early warning, and when the continuous occurrence number of the early warning exceedes alarm threshold value, indicates the police
Show that unit sends the signal of alarm.
3. the equipment according to claim 2 for being used to detect the seal of gas station's closed system, wherein the setting frequency
Rate scope includes obtaining a time data and corresponding oil-air pressure per 1-120 seconds, and the predetermined detection duration scope includes
2-20 minutes, within segment limit includes 12-120 hours during the predetermined early warning, the threshold value of warning scope was included in predetermined pre-
The number of times for exceeding the predetermined threshold in the alert period accounts for total 10%-90% for exceeding number of times in the predetermined early warning period, described
Alarm threshold value scope includes early warning occur in 24-720 hours.
4. the equipment according to claim 3 for being used to detect the seal of gas station's closed system, wherein the setting frequency
Rate scope includes obtaining within every 10 seconds a time data and corresponding oil-air pressure, and the predetermined detection duration scope includes 5 points
Clock, within segment limit includes 24 hours during the predetermined early warning, the threshold value of warning scope is included in the predetermined early warning period and surpassed
The number of times for crossing the predetermined threshold accounts for total more than the 25% of number of times in the predetermined early warning period, and the alarm threshold value scope includes
There is early warning in 120 hours.
5. the equipment for being used to detect the seal of gas station's closed system according to any one of claim 1-4, wherein
Calculating includes from each time started to the fall off rate of the corresponding oil-air pressure of corresponding end time：
From oil-air pressure corresponding with each time started at the end of with each in calculating time transverse axis and the oil-air pressure longitudinal axis
Between the straight slope of corresponding oil-air pressure institute shape.
6. the equipment for being used to detect the seal of gas station's closed system according to any one of claim 1-4, wherein
The predetermined threshold is on gas station's Air Pollutant Emission according to National Standard of the People's Republic of China GB20952-2007
Standard is set according to Beijing provincial standard DB11/208-2010 on gasoline station oil gas discharge control and limitation standard
's.
7. a kind of on-line monitoring system for oil gas recovery of gas station, including being used for any one of claim 1-6 are detected and added
The equipment of the seal of petrol station closed system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720380870.5U CN206618549U (en) | 2017-04-12 | 2017-04-12 | Detect the equipment and online monitoring system of the seal of gas station's closed system |
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|---|---|---|---|
| CN201720380870.5U CN206618549U (en) | 2017-04-12 | 2017-04-12 | Detect the equipment and online monitoring system of the seal of gas station's closed system |
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| CN206618549U true CN206618549U (en) | 2017-11-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341976A (en) * | 2018-10-12 | 2019-02-15 | 安徽育安实验室装备有限公司 | A kind of experimental enviroment gas leak detection method |
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2017
- 2017-04-12 CN CN201720380870.5U patent/CN206618549U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341976A (en) * | 2018-10-12 | 2019-02-15 | 安徽育安实验室装备有限公司 | A kind of experimental enviroment gas leak detection method |
| CN109341976B (en) * | 2018-10-12 | 2023-06-23 | 安徽育安实验室装备有限公司 | Method for detecting leakage of gas in test environment |
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