CN109869633A - Fuel gas supply system with safety protection function - Google Patents
Fuel gas supply system with safety protection function Download PDFInfo
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- CN109869633A CN109869633A CN201811610676.7A CN201811610676A CN109869633A CN 109869633 A CN109869633 A CN 109869633A CN 201811610676 A CN201811610676 A CN 201811610676A CN 109869633 A CN109869633 A CN 109869633A
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Abstract
The present invention provides a kind of fuel gas supply systems with safety protection function, it includes Internet of Things gas meter, fuel gas detection probe, gas appliance, field alert device and Internet of Things network, it include metering device in Internet of Things gas meter, control system and overcurrent cutting-off valve, when metering device be collected into when reaching combustible gas gas concentration early warning value according to the combustible gas gas concentration for reaching improper super flow consumption data early warning value or fuel gas detection probe detects with destiny, live early warning control module sounds an alarm instruction to field alert device, it sounds an alarm；When reaching cutoff value, data make cutting instruction to valve cutting control module through data transmission of internet of things module to management backstage, and by management backstage through data transmission of internet of things module transfer, cut off overcurrent cutting-off valve.The present invention can carry out judgement examination with normal consumption to just common gas consumption, carry out intelligent early-warning to abnormal conditions and close the processing of gas supply, effectively avoid dangerous situation.
Description
Technical field
The present invention relates to gas meter safety systems.
Background technique
Safety management problem is the vital cardinal task of gas enterprise！One home fuel gas enterprise often faces ten hundreds of
Terminal client, the residential customers that especially quantity is quite huge, distribution is extremely wide, management difficulty is quite big, due to visitor
The factor that family end influences safety gas is extremely more, and situation is complex, and portions of client lacks necessary safe knowledge and even pacifies in addition
Realize entirely it is thin, therefore, gas user end occur it is all kinds of leakage etc. reasons cause detonation safety accident it is many, to use
Family, society and gas company cause damages.
How combustion gas visitor user end security is effectively supervised using combustion gas problem? using which kind of technology or means come
Improve resident's indoor gas security of system energy? prevention or reduce resident's indoor gas accident occur, task it is complicated and
Arduousness, and current one of problem urgently to be resolved.
The approach for solving this problem is started in terms of two nothing more than.First, by using the client of combustion gas to carry out
Safety education, basic combustion gas knowledge a surname pass through and train, promote its correct operation using combustion gas and emergency disposal ability；And it is another
Aspect is then the reliability for trying every possible means to improve the security performance of resident's indoor gas system, equipment is implemented, makes every effort to accomplish do not have
The condition of generation accident.The present invention is namely based on this thinking, sets about from installations and facilities hardware aspect, by the way that some safety are arranged
Device takes technological means, to ensure that gas facility is in safely controllable state in user family, even if there is safety wind
It can also be acted rapidly behind danger, avoid the occurrence of accident and cause bigger loss.
It is well known that in household the most common gas safe accident be mostly because gas leakage into air, reach
Explosion limit causes after meeting incendiary source." leakage " is source, and " combustion gas mixes with air ratio and reaches explosion limit " " there are bright
The incendiary sources such as fire, electric spark, electrostatic " are conditions, and three is indispensable！
Ensure that accident does not occur in resident's indoor gas facility, primary certainly blocks source --- thoroughly eliminate " leakage "
Risk.But thousands upon thousands terminal clients are faced, cause leakage Producing reason varied, there is lacking for installations and facilities itself
Fall into factor, engineering construction quality leftover problem factor, material type selecting unreasonable factor, installations and facilities service life factor remote,
Corrosion influence factors, personnel operate disposing capacity factor etc., intricate, are fully solved leakage problem and are difficult to accomplish.
So, since leakage be difficult to avoid that, we how leakage generate initial stage (do not enter explosion limit or
Before there is no incendiary source appearance) this leakage can be monitored by technological means in time, and take timely measure cutting gas source
Stop combustion gas leaking, eliminate risk? and the capital investment of this measure should not just be had too greatly, based on existing facility
Operability.Solution of the invention is exactly based on this.
1, the just common gas consumption of gas appliance
The indoor gas equipment of resident is generally three classes: kitchen range, water heater, wall-hung boiler etc..Some users use it
Middle one kind, some use two kinds, and there are also users to use these three types of gas appliances.
Gas appliance (kitchen range, water heater, wall-hung boiler etc.) normal combustion (in rated load) in section at a reasonable time,
Certain combustion gas is consumed, indoor metering instrument (Internet of Things gas meter) display, storage and transmission are passed through.Fuel gas buring is in stable condition
Under nominal situation, for consumption in rated operating range, this belongs to just common gas consumption.
Under normal circumstances, household Double gas cooker kitchen range power is 3.8kw and 4.2kw.Water heater and wall-hung boiler and capacity and specified
Power is related, and 10 liters of water heaters are 20kw.By resident's indoor gas apparatus quantity, type, total rated power and consider thermal effect
In the case of rate, indoor maximum instantaneous gas consumption counter can be released, i.e., all gas appliances use simultaneously while peak load feelings
Amount of consumed gas under condition.In general, indoor there are non-if it exceeds this value can be considered as gas meter instantaneous flow
Just common gas situation, is treated as risk operating condition.
2, indoor gas non-normal consumption
Above-mentioned analysis is it is found that this part consumption for passing through gas appliance normal combustion is normal consumption.Obviously, except combustion gas is used
All amount of consumed gas except the just common gas consumption of tool belong to non-normal consumption.The present invention is directed to disappear to this part is improper
Consumption carries out taking corresponding measure after correctly identifying, eliminates risk, ensures safety.
Resident's non-normal consumption amount includes two kinds of situations, first is that the consumption that leakage generates；Second is that gas appliance (is used
Energy equipment) exception gas consumption.
(1) non-normal consumption that leakage generates
1) the maximum region of indoor gas disclosure risk
Leakage is the indoor maximum security risk source of resident, it is necessary to carry out selective analysis to it.Typical resident
Indoor gas supply schematic diagram is illustrated in fig. 1 shown below, and five-pointed star show risk of leakage point.
In general, leakage point mostly occurs in the aft section of gas meter, flow meter, this part non-normal consumption is can to pass through
Gauge table data reflect.If gas company backstage charging system can be real using Internet of Things gas meter
When monitor this data.
Previous thing is counted therefore, it is found that main risk of leakage point is followed successively by behind gauge table gas outlet and pipeline in household
Interface (1. locating in Fig. 1), gas pipeline end copy screw thread interface (2. locating in Fig. 1), valve ahead of gas stove (gas appliance before gram valve
Early gate) connect with hose (sebific duct) junction (in Fig. 1 3. locate), with gas appliance (kitchen range, water heater, wall-hung boiler etc.) it is soft
Pipe (metal hose, rubber tube etc., (4. locating in Fig. 1)), hose and gas appliance interface (5. locating in Fig. 1), gas appliance sheet
6. body (is located) in Fig. 1.
2) several typical cases revealed
Domestic gas meter tool is generally adopted by volume type measurement instrument (epithelium table etc.), it is all by gas meter, flow meter after
Any gas consumption can all be measured by gas meter come.Certainly, these consumptions had both included when gas appliance uses
Just common gas and it is improper consumed with gas, also include the non-normal consumption amount by above-mentioned risk point to outward leakage.
The present invention is directed using the resident of Internet of Things gas meter, all consumptions after table are (normal consumption, non-
Normal consumption, leakage rate) data include that the information such as instantaneous flow, integrated flow, date-time can be in Internet of Things gas meter, flow meter
It reflects and records on tool, while real-time Transmission gives gas company's background management system.
Which include the indoor typical leak situation of resident?
A) hose does not install hose clamp with the hose clamp for copying gram valve or gas appliance junction or (3., 5. installation does not fasten
Place) or external force pull, squeeze etc. reasons cause loosen caused by combustion gas leak: its feature first is that in certain time even
Some time flow be it is constant, being reflected in table tool is that instantaneous flow is small and substantially constant；It develops to hose and falls off the stage then
It is possible that the situation that flow is very big.
B) hose damaged (for example rubber hose is broken by the teeth by mouse, aging breach) or falling off causes combustion gas to leak and (4. locate):
Feature be in certain time even some time flow be it is constant, be reflected in table tool be early period instantaneous flow it is small and substantially permanent
Fixed, later period instantaneous flow will increase；Certain phase is developed to it is possible that the very big situation of flow.
C) (2. locate) junction gas leakage with hard tube screw thread before copying gram: its main feature is that a very long time flow be it is constant,
It is reflected in that be that instantaneous flow is small in table tool cut and substantially constant.
3) gas appliance ontology is revealed
A) gas appliance causes combustion gas non-normal combustion on its ontology to be let out because of quality or the reasons such as service life is longer
Drain in air, feature be in certain time even some time flow be it is constant, be reflected in table tool be instantaneous flow compared with
Small and substantially constant.
B) gas appliances such as kitchen range or water heater, wall-hung boiler because do not have blowout protection or flame-out protection device failure,
Lead to gas appliance abnormal consumption.For example, the unburned long-time leakage (missing of ignition to have consumption) of combustion gas after kitchen range accident extinguishing, or
Person's kitchen range because user forget close valve burned for long time, its main feature is that a very long time flow be it is constant, be reflected in
It is that instantaneous flow is larger and substantially constant in table tool.Water heater user is because of poisoning when reason leads to energy out of hand for another example
Power, water heater burned for long time.
(2) abnormal consumption of gas appliance
1) forget that closing fire or accident extinguishing does not automatically cut off, and leads in kitchen range (or water heater is without time-limit attachment) use process
It causes burned for long time or reveals for a long time.The combustion gas instantaneous flow shown in such case following table tool is larger and constant.
2) water heater installation is lack of standardization causes the poisoning of user's anoxic or other reasons to lose autonomous closing water heater energy
Power causes water heater long time running to burn.In such case following table tool the combustion gas instantaneous flow that shows it is constant and with normally make
It is consistent with the consumption of operating condition.
3, just common gas consumption and the judgement of non-normal consumption are screened
Key point of the present invention first is that correctly telling which data information and corresponding operating condition is abnormal consumption, be to have
The operating condition of material risk.Non-normal consumption operating condition had both included super flow rate working conditions --- the instantaneous flow i.e. on Internet of Things gas meter
It has been more than the total corresponding data on flows of rated power of indoor all gas appliances；It simultaneously also include long-time constant flow work
It is a fixed value that condition --- instantaneous flow i.e. on Internet of Things gas meter is constant for a long time, and this data on flows can not
It can be the consumption occurred under gas appliance normal combustion operating condition.
Summary of the invention
It is an object of the invention to make up the deficiencies in the prior art, a kind of intelligence that can integrate multinomial security function is provided
It can identify and protect fuel gas supply system.
To achieve the goals above, the invention adopts the following technical scheme: a kind of combustion gas with safety protection function
Supply system comprising:
One is set to the Internet of Things gas meter in subscriber household, includes metering device, control in Internet of Things gas meter
System and overcurrent cutting-off valve, and
One is set to the fuel gas detection probe in subscriber household, and fuel gas detection probe detects live combustible gas gas
Bulk concentration, and combustable gas concentration signal is sent to control system, and
At least one gas appliance, the gas appliance include blowout protection cutting solenoid valve, blowout protection cutting electricity
In the switching signal access control system of magnet valve, and
Field alert device and Internet of Things network,
Control system is by the way that in Internet of Things network insertion background management system, control system includes that continuous data receives mould
Block, combustable gas concentration signal receiving module, risk judgment module, data transmission of internet of things module, live early warning control module
And the valve of overcurrent cutting-off valve cuts off control module, it is pre- to be equipped with improper super flow consumption data in the risk judgment module
Alert value and cutoff value, combustible gas gas concentration early warning value and cutoff value, when metering device be collected into destiny evidence reach it is non-just
The combustible gas gas concentration that normal super flow consumption data early warning value or fuel gas detection probe detect reaches combustible gas gas
When concentration early warning value, live early warning control module sounds an alarm instruction to field alert device, and field alert device sounds an alarm；Work as meter
Amount device be collected into destiny according to reaching improper super flow consumption data cutoff value or fuel gas detection probe detects
Combustible gas gas concentration when reaching combustible gas gas concentration cutoff value, data are through data transmission of internet of things module transfer to management
From the background, and by management backstage through data transmission of internet of things module cutting instruction is made to valve cutting control module, cuts off overcurrent
Cutting-off valve.
Improper super flow consumption data includes super Traffic Anomaly data, and the super Traffic Anomaly data are indoor according to user
The total rated power of all gas appliances is converted to total amount of consumed gas, 1.15 total amount of consumed gas≤non-by thermal conversion efficiency
The total amount of consumed gas in normal super flow consumption data early warning value≤1.25.
Improper super flow consumption data further includes the long data of constant flow time-out, when the overtime long data foundation of the constant flow
Between section and local resident's living habit setting.
The long data of constant flow time-out include the time span for the invariable small flow gas time being greater than 4 hours.
The long data of constant flow time-out include the time span for the invariable big flow gas time in the late into the night being greater than 4 hours.
The long data of constant flow time-out include the constant time span for being 24 hours with the gas time.
Improper super flow consumption data early warning value is less than cutoff value, and combustible gas gas concentration early warning value is less than cutoff value.
The present invention can carry out judgement examination with normal consumption to just common gas consumption, carry out intelligent early-warning to abnormal conditions
And the processing of gas supply is closed, effectively avoid dangerous situation.Increasingly pay attention to privacy sky particularly with modern society, between neighbourhood
Between and privacy in the case where how effectively to avoid entire public space is caused danger or even endangered in single isolated house and give row
Effective solution scheme.And the solution of the present invention is simple, no matter for newly building the gas supply of cell or to existing
The transformation of gas supply Internet of Things table can quickly and easily and effectively, and feasibility is strong, is suitble to promote and apply.
Detailed description of the invention
Fig. 1 is existing resident's indoor gas supply system risk of leakage point；
Fig. 2 is technical solution of the present invention schematic illustration；
Fig. 3 is gas burning system gas supply schematic diagram of the single kitchen range user of embodiment 1 by traditional scheme；
Fig. 4 is schematic illustration of the single kitchen range user of embodiment 1 by technical solution of the present invention；
Fig. 5 is kitchen fuel gas supply system schematic diagram of the embodiment 2 by traditional scheme；
Fig. 6 is wall-hung boiler fuel gas supply system of the embodiment 2 by traditional scheme；
Fig. 7 is embodiment 2 by kitchen fuel gas provisioning technique scheme schematic diagram of the invention；
Fig. 8 is embodiment 2 by wall-hung boiler gas supply technical solution schematic diagram of the invention；
Wherein, table tool 100, kitchen range 101, water heater 102, wall-hung boiler 103, flammable gas alarm device 104, the combustion of Internet of Things object
Gas meter tool 105, meter 105.1, control system 105.2, solenoid valve 105.3, fuel gas detection probe 106, combustion gas 107,
Sebific duct 108, setting value and setting condition 109, blowout protection cutting-off valve switching signal 110, overcurrent cutting-off valve 111, safety
Stop valve 112, combustable gas concentration signal 113, pre-payment cutting 115, leakage linkage stop valve 116.
Specific embodiment
A kind of fuel gas supply system with safety protection function of the invention includes one being set in subscriber household
Internet of Things gas meter, interior Internet of Things gas meter includes metering device, control system and overcurrent cutting-off valve；It further include one setting
The fuel gas detection probe being placed in subscriber household, fuel gas detection probe detect live combustible gas gas concentration, and will
Combustable gas concentration signal is sent to control system；It further include at least one gas appliance, the gas appliance includes flame-out
Protection cutting solenoid valve, blowout protection are cut off in the switching signal access control system of solenoid valve；Further include field alert device and
Internet of Things network.
Control system is by the way that in Internet of Things network insertion background management system, control system includes that continuous data receives mould
Block, combustable gas concentration signal receiving module, risk judgment module, data transmission of internet of things module, live early warning control module
And the valve of overcurrent cutting-off valve cuts off control module, it is pre- to be equipped with improper super flow consumption data in the risk judgment module
Alert value and cutoff value, combustible gas gas concentration early warning value and cutoff value, when metering device be collected into destiny evidence reach it is non-just
The combustible gas gas concentration that normal super flow consumption data early warning value or fuel gas detection probe detect reaches combustible gas gas
When concentration early warning value, live early warning control module sounds an alarm instruction to field alert device, and field alert device sounds an alarm；Work as meter
Amount device be collected into destiny according to reaching improper super flow consumption data cutoff value or fuel gas detection probe detects
Combustible gas gas concentration when reaching combustible gas gas concentration cutoff value, data are through data transmission of internet of things module transfer to management
From the background, and by management backstage through data transmission of internet of things module cutting instruction is made to valve cutting control module, cuts off overcurrent
Cutting-off valve.
It includes super Traffic Anomaly data and perseverance that key point of the present invention, which also resides in and how to screen improper super flow consumption data,
The long abnormal data of flow time-out.
(1) non-normal consumption data --- super Traffic Anomaly operating condition
1) for single kitchen range client
According to the indoor kitchen range rated power of user, it is contemplated that after thermal conversion efficiency, total amount of consumed gas is converted to, by this
Data are used as super Traffic Anomaly operating condition early warning setting value after suitably amplifying a bit.
General domestic consumer's Double gas cooker kitchen range rated power is 8kw, unified by 1.0m3/ h is pre- as the super flow of this kind of client
Alert setting value, the early warning when instantaneous flow shown on gas meter reaches the value, system will issue sound-light alarm, simultaneously
Wechat is sent to user by gas company backstage or short message warns, and warns and user is guided to exclude abnormal conditions.
According to actual condition by early warning value (1.0m3/ h) cut off as super Traffic Anomaly operating condition after appropriate amplification a little
Setting value.It, can be by 1.2m for single kitchen range user3/ h cuts off setting value as the super flow of this kind of client, once gas meter, flow meter
When the instantaneous flow shown on tool reaches the value, system may turn off solenoid valve cutting gas source supply.Pass through gas company simultaneously
Backstage sends wechat to user or short message warns, and hand-reset restores gas supply after user excludes abnormal conditions, can also pass through combustion gas
Restore gas supply after enterprise backend systems confirmation.
2) for " kitchen range+water heater " client
According to the total rated power of the indoor used all gas appliances (kitchen range+water heater) of user, it is contemplated that heat
After transfer efficiency, it is converted to total amount of consumed gas, is set after this data suitably being amplified a little as super Traffic Anomaly operating condition early warning
Definite value.
For example, unified by 3.0m3The super flow early warning setting value of/h as this kind of client, once shown on gas meter
Early warning when instantaneous flow reaches the value, system will issue sound-light alarm, while micro- to user's transmission by gas company backstage
Letter or short message warning, warn and user are guided to exclude abnormal conditions.
Setting value after suitably amplifying early warning value a little according to actual condition as the cutting of super Traffic Anomaly operating condition.Than
Such as, for " kitchen range+water heater " user, by 3.2m3/ h cuts off setting value as the super flow of this kind of client, once gas meter
When the instantaneous flow of upper display reaches the value, system may turn off solenoid valve cutting gas source supply.Simultaneously by behind gas company
Platform sends wechat to user or short message warns, and hand-reset restores gas supply after user excludes abnormal conditions, can also pass through combustion gas public affairs
Restore gas supply after taking charge of background system confirmation.
3) for the reduction procedure of single kitchen range user, " kitchen range+water heater " user
To put it more simply, above-mentioned two classes user (single kitchen range user, " kitchen range+water heater " user) can also uniformly be examined
Consider, is set as identical value.
For example, by 3.0m3/ h and 3.2m3Super flow early warning and cutting setting value of/the h respectively as these two types of users, combustion gas
Table tool instantaneous flow reaches 3.0m3/ h and 3.2m3When/h value, system early warning and closing solenoid valve.
4) for being equipped with the gas user of wall hanging furnace apparatus
Wall-hung boiler client's gas consumption is larger, according to user indoor used all gas appliance (kitchen range, water heater, walls
Hang furnace) total rated power, it is contemplated that after thermal conversion efficiency, it is converted to total amount of consumed gas, this data is suitably amplified a bit
Early warning setting value as super Traffic Anomaly operating condition afterwards, appropriate amplification is as cutting setting value on this basis.
(2) non-normal consumption state --- the long unusual service condition of constant flow time-out
It other than super traffic conditions are unusual service condition, security risk operating condition, is much revealed in household, especially leakage hair
Raw early period, the phenomenon that showing are that occur by the not super traffic conditions of gas flow of gas meter, but long period
Invariable or even very little.Although not super flow, but if not being the consumption of normal combustion, also security risk operating condition
It and is material risk operating condition.
There is no the operating conditions of obvious superfluidity for this, but its really non-normal consumption, are dangerous working conditions, ask
Does is topic how we carry out being appropriately determined?
It is well known that residential households with gas ordinary circumstance be the unlikely continuous some time it is constant on a flow not
Become, even slow fire Baoshang the case where, be generally not more than 4 --- 5 hours.For another example, at dead of night, usually less may be used
It can continuous several hours invariable larger flow gas or continuous 5 hours or more invariable small flow gas.
There is situations such as these situations are particularly likely that the damaged leakage of silk mouth interface, hose, the leakage of gas utensil body defects
Caused by；It is also possible to be exactly after kitchen range accident extinguishing stop valve failure do not close combustion gas in time, cause combustion gas not burnt
And it reveals；Or user's forgetting pass valve leads to kitchen range dry combustion method；Or there is unexpected lose and closes water heater energy in water heater user
Power leads to the long burning of water heater time-out.
After above-mentioned abnormal leakage or abnormal combustion operating mode's switch are come out, early warning is carried out to it and even shuts off operation to be that have can
Some safety accidents can be avoided to generate.Certainly, imposing a condition for this kind of operating condition will come according to the local domestic gas habit that occupies
It determines, cannot impose uniformity without examining individual cases.
(3) material risk performance analysis and judgement
By blowout protection control valve signal (the open and close position of the indoor all gas appliances (with energy equipment) of resident
Signal), combustible gas probe probe signal (concentration data information) introduce the control system in Internet of Things gas meter of the present invention
In system.There are one of following situations, system starts early warning, closes valve if situation further deteriorates or does not obtain control processing
Cut off gas source supply.
1) when all when being in closed state with energy equipment blowout protection valve, i.e., all gas appliances do not make
Illustrate there is gas leakage at this time if showing amount of consumed gas on gauge table with combustion gas, is abnormal leakage operating condition.
2) there is gas appliance to be used, i.e., when available energy equipment blowout protection valve is in the open state, but gauge table
Consumption (instantaneous flow) on tool is far longer than the total metered flow for the gas utensil being currently running, and belongs to super Traffic Anomaly work
Condition.
3) the long work of gas appliance time-out, such as more than 12 hours continuous gas consumptions, and instantaneous flow substantially constant did not changed,
Illustrate that gas appliance is not normally operated, for example client forgets that closing kitchen range, water heater or user loses manipulation ability
Deng belonging to abnormal consumption operating condition.
4) there are always constant gas consumption in 24 hours or 0:00~6:00 period, illustrate that there may be leakage situations.
5) Domestic gas leakage alarm has detected gas leakage, and reaches certain value.
6) instantaneous flow, which is higher than, has the range upper limit with energy equipment total rated heat input, rated heat load or table, illustrates that there may be pipelines
Especially hose fracture, disconnect situations such as, hence it is evident that be unusual service condition.
7) background system detects other abnormal conditions.
(4) multifunctional safe early warning and cutting system implementer case
By above-mentioned analysis, by means of big data system, by the indoor just common gas consumption of residential customers and abnormal super flow
Consumption data, just common gas operating condition are distinguished with abnormal risk operating condition, technical solution according to the invention, by resident family
Blowout protection control valve signal (open and close position signal), the combustible gas probe of interior all gas appliances (with energy equipment)
Probe signal (concentration data information) is introduced into the control system in Internet of Things gas meter of the present invention, in the controls: 1)
Set improper super flow consumption data early warning value and cutoff value；2) combustible gas monitoring probe concentration early warning value and cutoff value；
3) decision condition etc. of all kinds of security exception operating conditions such as long constant current of time-out, once system detection to destiny evidence and actually use gas
Operating condition is judged as abnormal condition situation, the timely early warning of invention system, if situation further deteriorates or do not obtain control processing
Solenoid valve is then closed, gas supply is cut off, then accident is possible to avoid or reduce causality loss.
According to risk development trend, a point two-stage is managed: first early warning, rear cutting！Meet early-warning conditions, system is to correlation
Personnel send text, data or even image information early warning, and scene issues sound and light alarm signal, and client is connected to after warning information in time
Exclusion processing is carried out to dangerous working condition；Further deteriorate or do not obtain control processing such as situation, reaches cutting condition, then system is dynamic
Make, close solenoid valve, it is ensured that safety.
It eliminates to failure or abnormal conditions, can restore manually after user's confirmation is errorless, gas company backstage can also be passed through
System is intervened (cutting and recovery).
Technical solution of the present invention schematic diagram is illustrated in fig. 2 shown below.Once system enters early warning stage, Internet of Things gas meter number
It is waken up according to Transmission system, terminates suspend mode, frequently to backstage transmitting data information, not only improve gas company background work personnel
It is handled in time according to data information, controls risk and make every effort to avoid accident, while being also convenient for subsequent correctly analysis accident hair
Reason is searched in raw process, analysis, and summing up experience improves safety management level.
Embodiment 1:
The a certain residential customers in south, only use an eyes gas cooker, and 6 square metres of kitchen area, layer is 2.8 meters high,
It is fitted without water heater and wall-hung boiler, 16 cubic metres of kitchen space volume or so.
According to traditional scheme, a set of independent provided with electromagnetic valve 112 of the user installation, fuel gas detection probe 106 can
Fire gas warning system 104, an overcurrent cutting-off valve 111,105, Double gas cooker kitchen ranges 101 of an Internet of Things gas meter and
Corresponding fuel gas supply system, as shown in Figure 3.
Experiment test and analysis shows:
1), leakage point natural leak amount after table: under normal conditions, the natural leak amount of the generations such as gas meter, flow meter, valve, kitchen range
It is smaller, it is 0.02m3The lower explosion limit of/h or so, natural gas are calculated by 5%, reach the minimum tolerance 0.8m of explosion limit3, need
40 hours；Leakage caused by silk mouth and hose connection loosen or installation does not fasten is generally 0.04m3~0.1m3/ h reaches quick-fried
The fried limit is generally also at least also at 8 hours or more.
2), hose falls off caused leakage rate: after hose falls off, the leakage rate gas and front-end pipelines length, bore of combustion gas
After thering is relationship, test to show that the indoor hose of general resident falls off, natural gas flow scooter to 8.0m3/ h or more, soon
It can achieve lower explosion limit, once detonation, on fire or explosion will be occurred by fire source occur.
3), Double gas cooker kitchen range maximum gas consumption: Double gas cooker kitchen range total load is 8.0kw or so, considers thermal efficiency factor, two
Maximum amount of consumed gas is 1.0m when a kitchen range uses simultaneously3/ h or so.
4) the maximum gas consumption of water heater, wall-hung boiler: it is related with its rated power, it can be by simply converting
Out.
The technology of the present invention embodiment:
1, parameter and technical conditions are set
1), the user only needs to install 105, Double gas cooker kitchen ranges 101 of an Internet of Things gas meter and corresponding combustion gas
Supply system and fuel gas detection probe 106.
2), by the flammable of two blowout protection cutting-off valve switching signals 110 of Double gas cooker kitchen range and fuel gas detection probe
Gas concentration signal 113 is introduced into the control system 105.2 of Internet of Things gas meter.
3) by 1.0m3The non-normal consumption data early warning setting value of/h as present system；By 1.1m3/ h is as cutting
Setting value.
4) 5 hours flows by Internet of Things gas meter invariable (variation range is in ± 5.0%) are set as
Security exception operating condition early warning imposes a condition；By 5.2 hours flows by Internet of Things gas meter, invariable (variation range was
In ± 5.0%) it is set as security exception operating condition cutting setting condition.
5) the natural-gas fraction 1.0% for monitoring fuel gas detection probe is used as early warning setting value；It will be flammable
The natural-gas fraction 3.0% that gas detection probe monitors is as cutting setting value.
Technical solution schematic illustration is as shown in Figure 4.
2, system early warning and cutting
As long as 1), reach 1.0m by the flow of Internet of Things gas meter3/ h just has early warning in kitchen --- and it is existing
Field issues sound-light alarm prompt；Gas company's background management system informs user kitchen by photos and sending messages such as wechat, short messages simultaneously
Natural gas has abnormal conditions appearance, and user is instructed to handle using correct way, eliminates risk.
2), when flow reaches 1.1m3When/h, the solenoid valve 105.3 in Internet of Things gas meter is automatically closed in system, cutting
Gas supply.After user confirms and eliminates risk, manual reset restores gas supply, or opens electromagnetism by gas company backstage
Valve restores gas supply.
3) flow invariable (variation range is in ± 5.0%), by Internet of Things gas meter was more than 5 hours, kitchen
Early warning is just had in room --- scene issues sound-light alarm prompt；Simultaneously gas company's background management system by wechat,
The photos and sending messages such as short message inform that user kitchen natural gas has abnormal conditions appearance, and user is instructed to handle using correct way, eliminate wind
Danger.
4), when the flow by Internet of Things gas meter invariable (variation range is in ± 5.0%) is small more than 5.2
When, the solenoid valve in Internet of Things gas meter is automatically closed in system, cuts off gas supply.After user confirms and eliminates risk, people
Work, which resets, restores gas supply, or restores gas supply by gas company backstage opens solenoid valve.
5) it, when the natural-gas fraction that fuel gas detection probe monitors reaches 1.0%, is just had in kitchen pre-
Alert prompt --- scene issues sound-light alarm prompt；Gas company's background management system passes through the photos and sending messages such as wechat, short message simultaneously
It informs that user kitchen natural gas has abnormal conditions appearance, user is instructed to handle using correct way, eliminate risk.
6), when the natural-gas fraction that fuel gas detection probe monitors reaches 3.0%, object is automatically closed in system
The solenoid valve networked in gas meter cuts off gas supply.After user confirms and eliminates risk, manual reset restores combustion gas and supplies
It answers, or gas supply is restored by gas company backstage opens solenoid valve.
7), when 2 blowout protection cutting-off valves of Double gas cooker kitchen range are in close state (unused combustion gas), if combustion gas
Having flow indication on table tool and continue to exceed 1 minute, early warning is just had in kitchen --- scene issues sound-light alarm prompt；
Gas company's background management system informs that user kitchen natural gas has abnormal conditions to go out by photos and sending messages such as wechat, short messages simultaneously
It is existing, it instructs user to handle using correct way, eliminates risk.Continuous time is more than 1.5 minutes, and Internet of Things combustion is automatically closed in system
Solenoid valve in gas meter tool, cuts off gas supply.After user confirms and eliminates risk, manual reset restores gas supply, or logical
It crosses gas company backstage opens solenoid valve and restores gas supply.
Embodiment 2:
The a certain residential customers in the north, using 101,10 liters of gas instantaneous water heaters 102 of an eyes gas cooker, by
Internet of Things gas meter 105 measures, and is mounted in kitchen, 6 square metres of kitchen area, and layer is 2.8 meters high, and kitchen space volume 16 is vertical
Square rice or so.
Furthermore it is also equipped with a 35kw burnt gas wall hanging furnace 103, is used for warming, is fired by an other G2.5 Internet of Things
105 metering of gas meter tool, is installed on the balcony of 12 cubic metres of volume.
According to traditional scheme, which needs to install two sets of independent leakage linkages cutting solenoid valve 116,2 respectively can
The overcurrent cutting-off valve 111,2 of flammable gas alarm device 117, the 2 Internet of Things gas meter 105 of combustion gas detection probe,
One Double gas cooker kitchen range, 101, gas heaters 102, burnt gas wall hanging furnace 103 and corresponding fuel gas supply system, are shown in Fig. 5, Fig. 6
It is shown.
Experiment test and analysis shows:
1), leakage point natural leak amount after table: under normal conditions, the natural leak amount of the generations such as gas meter, flow meter, valve, kitchen range
It is smaller, it is 0.02m3The lower explosion limit of/h or so, natural gas are calculated by 5%, reach the minimum tolerance 0.8m of explosion limit3, need
40 hours；Leakage caused by silk mouth and hose connection loosen or installation does not fasten is generally 0.04m3~0.1m3/ h reaches quick-fried
The fried limit is generally also at least also at 8 hours or more.
2), hose falls off caused leakage rate: after hose falls off, the leakage rate gas and front-end pipelines length, bore of combustion gas
After thering is relationship, test to show that the indoor hose of general resident falls off, natural gas flow scooter to 8.0m3/ h or more, soon
It can achieve lower explosion limit, once detonation, on fire or explosion will be occurred by fire source occur.
3), Double gas cooker kitchen range maximum gas consumption: Double gas cooker kitchen range total load is 8.0kw or so, considers thermal efficiency factor, two
Maximum amount of consumed gas is 1.0m when a kitchen range uses simultaneously3/ h or so.
4) the maximum gas consumption of water heater, wall-hung boiler: it is related with its rated power, it can be by simply converting
Out.10 liters of water heater loads are 20kw, consider thermal efficiency factor, maximum amount of consumed gas 2.5m3/ h or so.Wall-hung boiler load
For 35kw, thermal efficiency factor, maximum amount of consumed gas 4.0m are considered3/ h or so.
The technology of the present invention embodiment:
1, parameter and technical conditions are set
The user only needs to install the water heater 102, one of Double gas cooker kitchen range 101, one of 2 Internet of Things gas meters 105, one
Platform wall-hung boiler 103 and corresponding fuel gas supply system and 2 fuel gas detection probes 106.
(1) kitchen cooker water heater fuel gas supply system implementer's case
1), the blowout protection cutting-off valve switching signal 110 of 101 two stove eyes of Double gas cooker kitchen range, water heater extinguishing are protected
The combustable gas concentration of cutting-off valve switching signal 110 and kitchen fuel gas detection probe detects signal 113 and introduces kitchen object
In gas meter control system of networking.
2) by 3.2m3Non-normal consumption data (overcurrent) the early warning setting value of/h as gas system for kitchen use；By 3.5m3/h
As cutting setting value.
3), 5 hours flows by kitchen Internet of Things gas meter invariable (variation range is in ± 5.0%) are set
It is set to security exception operating condition early warning setting condition；Invariable (the variation range of flow that 5.2 hours are had by kitchen fuel gas table
In ± 5.0%) it is set as security exception operating condition cutting setting condition.
4), the natural-gas fraction 1.0% for monitoring kitchen fuel gas detection probe is used as early warning setting value；It will
The natural-gas fraction 3.0% that fuel gas detection probe monitors is as cutting setting value.
Technical solution schematic illustration is as shown in Figure 7.
(2), balcony wall-hanging furnace fuel gas supply system implementer's case
1), by the flammable of the blowout protection cutting-off valve switching signal 110 of wall-hung boiler and balcony fuel gas detection probe
Gas concentration detection signal 113 is introduced into balcony Internet of Things gas meter control system.
2), by 3.6m3Non-normal consumption data (overcurrent) the early warning setting value of/h as balcony gas system；By 3.8m3/h
As cutting setting value.
3), 5 hours flows by balcony Internet of Things gas meter invariable (variation range is in ± 5.0%) are set
It is set to security exception operating condition early warning setting condition；Invariable (the variation range of flow that 5.2 hours are had by kitchen fuel gas table
In ± 5.0%) it is set as security exception operating condition cutting setting condition.
4), the natural-gas fraction 1.0% for monitoring balcony fuel gas detection probe is used as early warning setting value；It will
The natural-gas fraction 3.0% that fuel gas detection probe monitors is as cutting setting value.
Technical solution schematic illustration is as shown in Figure 8.
2, system early warning and cutting
(1), kitchen cooker water heater fuel gas supply system
As long as 1), reach 3.2m by the flow of kitchen Internet of Things gas meter3/ h just has early warning in kitchen and mentions
Showing --- scene issues sound-light alarm prompt；Gas company's background management system is informed by photos and sending messages such as wechat, short messages simultaneously
User kitchen natural gas has abnormal conditions appearance, and user is instructed to handle using correct way, eliminates risk.
2), when flow reaches 3.5m3When/h, the solenoid valve 105.3 in Internet of Things gas meter is automatically closed in system, cutting
Gas supply.After user confirms and eliminates risk, manual reset restores gas supply, or opens electromagnetism by gas company backstage
Valve restores gas supply.
3) flow invariable (variation range is in ± 5.0%), by Internet of Things gas meter was more than 5 hours, kitchen
Early warning is just had in room --- scene issues sound-light alarm prompt；Simultaneously gas company's background management system by wechat,
The photos and sending messages such as short message inform that user kitchen natural gas has abnormal conditions appearance, and user is instructed to handle using correct way, eliminate wind
Danger.
4), when the flow by Internet of Things gas meter invariable (variation range is in ± 5.0%) is small more than 5.2
When, the solenoid valve 105.3 in Internet of Things gas meter is automatically closed in system, cuts off gas supply.Confirm to user and eliminates risk
Afterwards, manual reset restores gas supply, or restores gas supply by gas company backstage opens solenoid valve.
It 5), will in kitchen when, the natural-gas fraction that fuel gas detection probe monitors when kitchen reaches 1.0%
There is early warning --- scene issues sound-light alarm prompt；Gas company's background management system passes through the hair such as wechat, short message simultaneously
Information informs that user kitchen natural gas has abnormal conditions appearance, and user is instructed to handle using correct way, eliminates risk.
6) when, the natural-gas fraction that fuel gas detection probe monitors when kitchen reaches 3.0%, system is closed automatically
The solenoid valve 105.3 in Internet of Things gas meter is closed, gas supply is cut off.After user confirms and eliminates risk, manual reset is extensive
Multiple gas supply, or gas supply is restored by gas company backstage opens solenoid valve.
7), in 2 blowout protection cutting-off valve switching signals of Double gas cooker kitchen range and water heater extinguishing protection cutting-off valve switch
Signal is in the case of closed state (unused combustion gas), if having flow indication on kitchen fuel gas table tool and continuing to exceed 1 point
Clock just has early warning in kitchen --- and scene issues sound-light alarm prompt；Gas company's background management system passes through simultaneously
The photos and sending messages such as wechat, short message inform that user kitchen natural gas has abnormal conditions appearance, instruct user to handle using correct way, disappear
Except risk.Continuous time is more than 1.5 minutes, and the solenoid valve in Internet of Things gas meter is automatically closed in system, cuts off gas supply.
After user confirms and eliminates risk, manual reset restores gas supply, or restores combustion by gas company backstage opens solenoid valve
Gas supply.
(2), balcony wall-hanging furnace fuel gas supply system
As long as 1), reach 3.6m by the flow of balcony Internet of Things gas meter3/ h, Internet of Things gas meter is just on balcony
Having early warning --- scene issues sound-light alarm prompt；Gas company's background management system passes through wechat, short message etc. simultaneously
Photos and sending messages inform that user kitchen natural gas has abnormal conditions appearance, and user is instructed to handle using correct way, eliminate risk.
2), when flow reaches 3.8m3When/h, the solenoid valve in Internet of Things gas meter is automatically closed in system, cuts off combustion gas
Supply.After user confirms and eliminates risk, manual reset restores gas supply, or extensive by gas company backstage opens solenoid valve
Multiple gas supply.
3) flow invariable (variation range is in ± 5.0%), by Internet of Things gas meter was more than 5 hours, sun
Platform just has early warning --- and scene issues sound-light alarm prompt；Gas company's background management system passes through wechat, short simultaneously
The photos and sending messages such as letter inform that user kitchen natural gas has abnormal conditions appearance, and user is instructed to handle using correct way, eliminate risk.
4), when the flow by Internet of Things gas meter invariable (variation range is in ± 5.0%) is small more than 5.2
When, the solenoid valve in Internet of Things gas meter is automatically closed in system, cuts off gas supply.After user confirms and eliminates risk, people
Work, which resets, restores gas supply, or restores gas supply by gas company backstage opens solenoid valve.
5), when the natural-gas fraction that balcony fuel gas detection probe monitors reaches 1.0%, balcony Internet of Things
Gas meter just has early warning --- and scene issues sound-light alarm prompt；Gas company's background management system passes through micro- simultaneously
The photos and sending messages such as letter, short message inform that user kitchen natural gas has abnormal conditions appearance, and user is instructed to handle using correct way, eliminate
Risk.
6), when the natural-gas fraction that balcony fuel gas detection probe monitors reaches 3.0%, system is closed automatically
The solenoid valve 105.3 in Internet of Things gas meter is closed, gas supply is cut off.After user confirms and eliminates risk, manual reset is extensive
Multiple gas supply, or gas supply is restored by gas company backstage opens solenoid valve.
7), when wall-hung boiler blowout protection cutting-off valve switching signal is in close state (unused combustion gas), if
Have flow indication on balcony gas meter and continue to exceed 1 minute, balcony Internet of Things gas meter just has early warning ---
Scene issues sound-light alarm prompt；Gas company's background management system informs user day by photos and sending messages such as wechat, short messages simultaneously
Right gas has abnormal conditions appearance, and user is instructed to handle using correct way, eliminates risk.Continuous time is more than 1.5 minutes, system
The solenoid valve 105.3 in Internet of Things gas meter is automatically closed, cuts off gas supply.After user confirms and eliminates risk, manually
It resets and restores gas supply, or gas supply is restored by gas company backstage opens solenoid valve.
Claims (7)
1. a kind of fuel gas supply system with safety protection function, characterized by comprising:
One is set to the Internet of Things gas meter in subscriber household, includes metering device, control system in Internet of Things gas meter
And overcurrent cutting-off valve, and
One is set to the fuel gas detection probe in subscriber household, and it is dense that fuel gas detection probe detects live combustible gas gas
Degree, and combustable gas concentration signal is sent to control system, and
At least one gas appliance, the gas appliance include blowout protection cutting solenoid valve, and blowout protection cuts off solenoid valve
Switching signal access control system in, and
Field alert device and Internet of Things network,
Control system by Internet of Things network insertion background management system, control system include continuous data receiving module,
Combustable gas concentration signal receiving module, risk judgment module, data transmission of internet of things module, live early warning control module and mistake
The valve for flowing cutting-off valve cuts off control module, is equipped with improper super flow consumption data early warning value in the risk judgment module
With cutoff value, combustible gas gas concentration early warning value and cutoff value, when metering device be collected into destiny according to reaching improper super
The combustible gas gas concentration that flow consumption data early warning value or fuel gas detection probe detect reaches combustible gas gas concentration
When early warning value, live early warning control module sounds an alarm instruction to field alert device, and field alert device sounds an alarm；When metering fills
Set be collected into destiny according to reach improper super flow consumption data cutoff value or fuel gas detection probe detects can
When combustion gas gas concentration reaches combustible gas gas concentration cutoff value, data are after data transmission of internet of things module transfer to management
Platform, and cutting instruction is made to valve cutting control module through data transmission of internet of things module by management backstage, cutting overcurrent is cut
Disconnected valve.
2. the fuel gas supply system according to claim 1 with safety protection function, it is characterised in that: improper super stream
Measuring consumption data includes super Traffic Anomaly data, the super Traffic Anomaly data volume total according to the indoor all gas appliances of user
Determine power and total amount of consumed gas, 1.15 total amount of consumed gas≤improper super flow consumption data are converted to by thermal conversion efficiency
The total amount of consumed gas in early warning value≤1.25.
3. the fuel gas supply system according to claim 2 with safety protection function, it is characterised in that: improper super stream
Amount consumption data further includes the long data of constant flow time-out, and the long data of the constant flow time-out are lived according to period and local resident
Habit setting.
4. the fuel gas supply system according to claim 3 with safety protection function, it is characterised in that: constant flow time-out
Long data include the time span for the invariable small flow gas time being greater than 4 hours.
5. the fuel gas supply system according to claim 3 with safety protection function, it is characterised in that: constant flow time-out
Long data include the time span for the invariable big flow gas time in the late into the night being greater than 4 hours.
6. the fuel gas supply system according to claim 3 with safety protection function, it is characterised in that: constant flow time-out
Long data include the constant time span for being 24 hours with the gas time.
7. the fuel gas supply system according to claim 3 with safety protection function, it is characterised in that: improper super stream
It measures consumption data early warning value and is less than cutoff value, combustible gas gas concentration early warning value is less than cutoff value.
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| CN110488719A (en) * | 2019-09-05 | 2019-11-22 | 北京市燃气集团有限责任公司 | Valve Control management system and method are closed in combustion gas |
| CN110887537A (en) * | 2019-10-17 | 2020-03-17 | 浙江威星智能仪表股份有限公司 | Gas safety detection method for gas |
| CN110956409A (en) * | 2019-12-10 | 2020-04-03 | 北方工业大学 | Community gas equipment risk control method and device |
| CN112229978A (en) * | 2020-09-30 | 2021-01-15 | 福建中科惠创科技有限公司 | Intelligent gas detection control system using normally closed gas cut-off valve |
| CN112907907A (en) * | 2021-02-07 | 2021-06-04 | 海宁新奥燃气发展有限公司 | Wireless remote transmission linkage cutting-off method for household gas alarm of Internet of things |
| CN113506430A (en) * | 2021-09-09 | 2021-10-15 | 杭州先锋电子技术股份有限公司 | Intelligent gas meter safety detection method |
| CN113703381A (en) * | 2021-10-29 | 2021-11-26 | 四川高诚物联网科技有限公司 | Gas alarm safety data acquisition method and terminal based on Internet of things |
| CN114673932A (en) * | 2022-04-07 | 2022-06-28 | 威海同天信息科技有限公司 | Method for guaranteeing gas safety by setting flow forbidden interval |
| CN115076610A (en) * | 2022-04-19 | 2022-09-20 | 北京市燃气集团有限责任公司 | Natural gas leakage automatic cutout device |
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| CN110488719A (en) * | 2019-09-05 | 2019-11-22 | 北京市燃气集团有限责任公司 | Valve Control management system and method are closed in combustion gas |
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| CN110956409A (en) * | 2019-12-10 | 2020-04-03 | 北方工业大学 | Community gas equipment risk control method and device |
| CN112229978A (en) * | 2020-09-30 | 2021-01-15 | 福建中科惠创科技有限公司 | Intelligent gas detection control system using normally closed gas cut-off valve |
| CN112907907A (en) * | 2021-02-07 | 2021-06-04 | 海宁新奥燃气发展有限公司 | Wireless remote transmission linkage cutting-off method for household gas alarm of Internet of things |
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| CN115076610A (en) * | 2022-04-19 | 2022-09-20 | 北京市燃气集团有限责任公司 | Natural gas leakage automatic cutout device |
| CN115076610B (en) * | 2022-04-19 | 2023-12-15 | 北京市燃气集团有限责任公司 | Automatic cutting device for natural gas leakage |
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Effective date of registration: 20210120 Address after: 528000 Jihua five road, Chancheng District, Foshan, Guangdong Province, No. 25 Applicant after: Fo ran Energy Group Co.,Ltd. Applicant after: Zhaoqing foran Natural Gas Co.,Ltd. Address before: No.4, Xinghua first branch road, Xiqing Development Zone, Xiqing District, Tianjin 300385 Applicant before: TIANJIN XINKE WHOLE SET INSTRUMENT & METER Co.,Ltd. |
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