CN202472377U - Hidden-danger early-warning and processing system for user combustion-gas safety - Google Patents
Hidden-danger early-warning and processing system for user combustion-gas safety Download PDFInfo
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- CN202472377U CN202472377U CN2012200369455U CN201220036945U CN202472377U CN 202472377 U CN202472377 U CN 202472377U CN 2012200369455 U CN2012200369455 U CN 2012200369455U CN 201220036945 U CN201220036945 U CN 201220036945U CN 202472377 U CN202472377 U CN 202472377U
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- 239000000567 combustion gas Substances 0.000 title abstract 4
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- 230000002159 abnormal effect Effects 0.000 claims description 14
- 238000007405 data analysis Methods 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 6
- 230000001066 destructive effect Effects 0.000 claims description 4
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- 238000009826 distribution Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
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- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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Abstract
The utility model provides a hidden-danger early-warning and processing system for user combustion-gas safety. The system comprises over-concentration power-break protection devices arranged at user low-voltage circuits, safety intelligent combustion-gas meters arranged at users and combustion-gas fire-disaster composite detectors arranged at users, all of which are used as field safety equipment. A monitoring center and a wireless communication network are also included. According to the utility model, the wireless communication technology is used for forming a large-scale monitoring system capable of detecting millions of users simultaneously, so that the gas consumption of hundreds of thousands of or millions of resident families is brought into a safety monitoring platform and the city public safety is guaranteed at the maximum.
Description
Technical Field
The invention relates to a system for predicting and processing potential safety hazards of gas.
Background
At present, the traditional gas safety guarantee mainly adopts three ways: 1. the reliability of the equipment is improved; 2. various safety devices are additionally arranged; 3. the integrity of pipelines, gas appliances and various safety devices is checked by adopting a manual regular field inspection method. For example: the stainless steel hose is used for replacing the rubber hose, so that the reliability of the equipment is improved; the safety monitoring equipment is added by adopting a safety gas meter, an overflowing stop valve, a gas leakage alarm, an emergency stop valve and a gas appliance with flameout protection. These conventional measures have proven to be somewhat effective. However, these conventional technical measures are basically based on the technology of the eighties of the last century, and cannot detect early signs in the early stage of an accident, so as to effectively prevent the accident and reduce the incidence rate and the degree of the accident. In order to ensure the normal operation of pipelines, gas appliances and safety equipment, a large amount of manpower is generally used for regularly carrying out on-site inspection on gas equipment facilities, and the on-site inspection has certain limitation.
The disadvantages of the conventional technical measures include three points: 1. the leakage can be discovered only when the accident caused by the leakage occurs; 2. the alarm device finds that the processing condition after abnormal alarm is dependent on the personnel on the site, and if no personnel are on the site, the occurrence probability of dangerous accidents is extremely high; 3. after an accident occurs, the investigation of the accident cause is difficult because the field data is difficult to trace.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to above-mentioned prior art's defect provides a system that carries out early warning and processing to user's gas potential safety hazard.
The technical scheme of the utility model is realized like this: the utility model provides a user's gas potential safety hazard early warning and processing system which characterized in that includes:
a field safety device comprising
-an over-concentration power-off protection device arranged on the low-voltage circuit of the user as a system power supply for the whole low-voltage circuit,
the safety intelligent gas meter is arranged on a user, and is internally provided with an emergency cut-off valve and an integrated chip with the following processing modules:
-a gas flow overcurrent emergency cut-off module for sending a cut-off signal to the emergency cut-off valve to cut off the gas supply emergently when the gas supply flow is outside the range of the gas flow required for the normal operation of the gas-using equipment, and
the gas pressure fluctuation emergency cut-off module sends a cut-off signal to the emergency cut-off valve to cut off the gas source emergently when the gas source pressure is out of the pressure range required by the normal work of the gas equipment,
-a gas fire composite detector provided to the user, said gas fire composite detector having
-a data acquisition device for acquiring gas concentration, carbon monoxide concentration and temperature parameters, and
-a data storage for storing parameter data collected by the data acquisition device,
-a data analysis and evaluation module for analyzing and evaluating whether the collected parameter data is abnormal,
the control module gives an alarm when the collected parameter data are abnormal, and sends a valve closing signal to a built-in gas emergency cut-off module of the safe intelligent gas meter and a power-off signal to the over-concentration power-off protection device;
a monitoring center comprises
-a memory for storing parameter data transmitted from the consumer gas fire complex detector, and
-a data analysis system for analytically evaluating whether the received parameter data is abnormal, and
a control processing system, which, in the event of an anomaly in the received parameter data, performs an alarm and subsequent processing,
and the wireless communication network is used for transmitting the data from the field equipment gas fire composite detector to the monitoring center.
Specifically, the wireless communication network comprises field terminal communication equipment, a wireless gateway and a monitoring center, wherein the wireless gateway serves as a primary management platform and sends information from the data terminal communication equipment to the monitoring center.
The wireless gateways comprise group wireless gateways, and each gateway is connected with 200-400 field terminal communication devices; and the special wireless gateway is only connected with one key gas user, and the key gas user is provided with a plurality of gas fire composite detectors.
The field terminal communication equipment, the wireless gateway and the monitoring center are in two-way communication.
Further, on-spot safety equipment still includes feels and shakes the module, feel shake the module through the data line connect in gas conflagration composite detector reaches safe intelligent gas table, the vibrations signal transmission that will detect have the intensity of destructive more than 6 degrees extremely gas conflagration composite detector reaches the integrated chip of safe intelligent gas table sends the shut off signal to the emergency cut-off valve, promptly cuts off the air supply.
Furthermore, the on-site safety equipment also comprises a miniature gas leakage detector arranged on the quick-mounting pipe joint at the position where the beginning end of the wall-buried stainless steel corrugated clad pipe is out of the wall, the miniature gas leakage detector detects the gas leakage condition at the position and transmits detection data to the gas fire composite detector.
Further, the on-site safety equipment also comprises an overflowing gas safety valve arranged at the connection part of the on-site safety equipment and the gas appliance.
The utility model discloses utilize ad hoc network technique to get up single user's on-the-spot safety device and surveillance center are related. The field device is provided with a gas fire composite detector with a data storage function, and when the indoor gas condition is abnormal, the composite detector can send alarm information and timely cut off the indoor gas and an indoor power supply. On the other hand, the composite detector uploads the monitored data information to the monitoring center at regular time, the monitoring center processes the alarm and monitoring information, and an intelligent analysis system is used for judging the states of pipelines and gas appliances of users, if the abnormal data is found, the system gives an alarm, and related personnel check the alarm information and then maintain and process the alarm information in time. The utility model discloses can make prediction and processing to user's gas potential safety hazard, possess the safety guarantee system of prediction in advance, handling in the affairs, function is trailed afterwards.
The utility model has the advantages that:
1. by utilizing the wireless communication technology, a large-scale monitoring system for simultaneously detecting millions of users can be formed, gas used by hundreds of thousands or millions of resident families in a city is brought into a safety monitoring platform, and the public safety of the city is guaranteed to the maximum extent;
2. the system can predict the occurrence of gas accidents by intelligently analyzing the gas concentration value of the user through the collection of a black box installed by the user, and meanwhile, the network equipment is installed in other public places or industrial facilities such as various schools, hotels, restaurants and the like, so that the gas leakage accidents are prevented;
3. uninterrupted service can be provided for all users at low cost, and manual service is greatly reduced;
4. the safety state of each user can be checked at any time by the gas management department so as to timely process the potential safety hazard.
Drawings
Fig. 1 is the utility model discloses whole user's gas potential safety hazard early warning and processing system.
Fig. 2 is a schematic diagram of the present invention for connecting the safety devices on the civil gas user site.
Fig. 3 is a monitoring center system work flow diagram.
Wherein,
1 emergency cut-off valve 2 sense shakes module
3 miniature gas leakage detector 4 gas safety valve
5 gas fire composite detector 6 power-off protection device
Detailed Description
As shown in fig. 1, the whole system of the early warning and processing system for the potential safety hazard of the gas of a user comprises field safety equipment, a monitoring center and a wireless communication network.
Fig. 2 is a schematic connection diagram of the field safety device, wherein a dashed line represents a buried wall gas pipeline, a central line represents a signal line, and the field safety device mainly comprises the following devices:
(1) the over-concentration power-off protection device 6 arranged on the low-voltage circuit of the user is used as a system power supply of the whole low-voltage circuit, and a 220V controlled power supply is connected with the user lighting lamp, the refrigerator, the range hood and other kitchen appliances. In order to prevent the gas from leaking to reach the concentration or the alarm cut-off system cannot timely and effectively alarm cut-off due to faults and prevent the indoor gas concentration from being reduced by adopting artificial measures for ventilation after the cut-off, the power supply is automatically cut off when the concentration is lower than the gas leakage alarm concentration, and an over-concentration power-off protection device is arranged to prevent secondary disasters caused by burning explosion due to the generation of electric sparks in the room artificially or naturally.
(2) The user safety intelligent gas meter is internally provided with a gas emergency cut-off valve 1, and has interfaces with a plurality of external signal sources, once various accident signals are received, the gas emergency cut-off valve can be cut off emergently, so that the gas emergency cut-off valve has an effective disposal function, and an independent emergency cut-off valve outside a metering device is omitted, so that the purpose of safe disposal is achieved, the process is simplified, and the investment is reduced.
(3) The composite detector 5 for the gas fire comprises a data acquisition device and is used for acquiring gas concentration, carbon monoxide concentration and temperature parameters, wherein the data acquisition device is arranged on the composite detector 5 for the gas fire; the data memory is used for storing the parameter data collected by the data acquisition device; the data analysis and evaluation module is used for analyzing and evaluating whether the collected parameter data are abnormal or not; and the control module is used for alarming when the collected parameter data are abnormal, and simultaneously sending a valve closing signal to a built-in gas emergency cut-off module of the safe intelligent gas meter and sending a power-off signal to the over-concentration power-off protection device. The gas and fire composite detector 5 has the functions of gas leakage, incomplete combustion, fire or earthquake vibration and the like, signals are sent to a gas flow overflowing emergency cut-off module arranged in the safe intelligent gas meter, and cut-off signals are sent to the emergency cut-off valve as long as the gas leakage concentration, the indoor space temperature and the CO value generated by incomplete combustion exceed set values. The built-in data storage can timely record the values of gas leakage concentration, temperature, carbon monoxide concentration and the like every 4min period within 25h before an accident occurs, is convenient to trace, and is beneficial to accident evidence obtaining and analysis.
(4) The built-in integrated chip of the safe intelligent gas meter is provided with a gas pressure fluctuation emergency cut-off module, and the vibration sensing emergency cut-off module can be integrated in the built-in integrated chip of the safe intelligent gas meter and can also be independently arranged, so that the vibration with destructive intensity of more than 6 degrees (including violent vibration which can damage a pipeline structure due to earthquake or adjacent explosion and the like) and the change of the pressure and the flow of a gas source can be effectively detected. When the gas-consuming equipment is subjected to destructive vibration with intensity of more than 6 degrees and the flow and pressure of the gas source fluctuate outside the pressure range required by normal operation of the gas-consuming equipment, a signal is transmitted to the emergency cut-off valve to cut off the gas source emergently. Meanwhile, the emergency cut-off valve 1 receives a signal sent by the gas fire composite detector 5, and starts an emergency cut-off gas source in case of special conditions.
(5) A miniature gas leakage detector 3 is arranged on a quick-mounting pipe joint at the position where the initial end of a wall-buried stainless steel corrugated clad pipe is exposed from the wall, and a drainage device is arranged on the quick-mounting pipe joint. In case of a leak, the micro gas leak detector 3 will transmit a signal to the gas fire composite detector 5, which will be processed as necessary depending on the situation.
(6) The joint of the gas safety valve and the gas appliance is provided with the gas safety valve, and the gas safety valve is used for automatically and mechanically cutting off the pipeline when the gas flow in the pipeline is suddenly increased, so that the safety of artificial damage (including gas suicide utilization and the like) caused by the falling of the gas connecting pipe with the gas appliance can be ensured. Meanwhile, the timer automatically cuts off the air source according to the set time, so that serious damage caused by long-time small leakage and micro leakage is avoided.
Except that the gas fire composite detector 5 needs 220V strong current to supply low-voltage current through the built-in alternating current-direct current conversion device of the power-off protection device 6, the signal receiving and handling of the metering device are powered by dry batteries, the service life is generally more than 1 year, and the whole automatic control system is connected by a signal bus.
The monitoring center comprises a memory for storing parameter data transmitted from the user gas fire composite detector; the data analysis system analyzes and evaluates whether the received parameter data are abnormal; and the control processing system gives an alarm and performs subsequent processing when the received parameter data is abnormal. The monitoring center end depends on the network control center, can obtain the alarm information and the gas concentration data of the gas detection alarm in real time through a wireless private network or a public network, and realizes remote autonomous monitoring and management. The monitoring center system is shown in FIG. 3 and comprises
1. Management function
1) User management
The method comprises the steps of user maintenance, user login, user logout and password change.
2) Hierarchical management
The user can implement multi-level management according to all levels of authority.
3) Packet management
The status monitoring devices can be autonomously managed in groups according to the requirements of customers (such as according to different areas, different types and the like).
4) Information management
And setting detailed information of the state monitoring points, such as addresses, responsible persons, contact ways and the like.
5) Online declaration management
And the user reports the monthly gas consumption online every month, records and stores reported data, and generates a report.
2. Report of statistical analysis
1) Alarm report
And selecting a time period and checking all alarm information.
2) Query report
By selecting the start time, end time, and items to which the system pertains, the system can generate parameter reports in a variety of forms, such as excel tables, histograms, graphs, and the like, and printouts. The report content includes information of state changes of all monitored points and corresponding time information.
3) Analysis report
And carrying out effective data analysis and trend analysis prediction on the relationship among the gas consumption, the energy consumption and relevant factors.
4) Map display function
And the geographic information system displays information such as geographic positions of related users. The function of inquiring the classified information can be realized on the GIS map: the method comprises various kinds of relevant information such as public building distribution, boiler room distribution, management unit distribution and the like; clicking on the user mark point may enter the display interface. The enhanced version can also comprise an MES process real-time monitoring system, and when a user (comprising a local ordinary user, a remote advanced user and a manager user) clicks a specified user on a map, the operation condition and various operation parameters of the user can be intuitively displayed in real time.
And the wireless communication network transmits the data from the field equipment gas fire composite detector to the monitoring center. The wireless communication network comprises field terminal communication equipment, a wireless gateway and a monitoring center, wherein the wireless gateway is used as a primary management platform to send information from the data terminal communication equipment to the monitoring center. In particular, the present invention relates to a method for producing,
the Zigbee ad hoc network and the terminal communication equipment are used for communicating with the wireless gateway and solving the problem of short-distance wireless communication of small user groups (such as houses) so as to reduce the cost. The Zigbee communication protocol and a small user group (such as a house) form the user group network in a self-addressing mode, and one wireless gateway can connect two hundred to four hundred users of the small user group. After receiving the information, the wireless gateway sends the information to a monitoring information center through a wireless private network or a wireless public network (mobile, telecommunication and Unicom). The wireless gateway is also a primary management platform, so that the information amount sent to the information center is reduced, and the operation cost is reduced. Such wireless gateways are also known as "group gateways. And the data terminal forms a local networking in a self-organizing way through the ZigBee module.
The wireless independence includes group wireless gateways and private wireless gateways. The group wireless gateway is based on a Zigbee protocol, is used for equipment of small user groups (such as residences), can be connected with 200-400 terminal communication equipment by each gateway, and is mainly used for residences and small catering gathering areas. The gateway is also a primary management platform, and when the terminal communication equipment managed by the gateway works normally, the gateway and the monitoring center keep normal contact. When the terminal communication equipment sends out alarm signal, the gateway sends signal to the monitoring center. When the monitoring center sends out the information instruction of adjusting the black box, the gateway sends the information of hundreds of alarms to the monitoring center together. Therefore, a monitoring center only needs to use the wireless gateway for ten thousand station groups to form hierarchical management, and the operation cost is reduced. The special wireless gateway is only responsible for one gas user, and a gas alarm system of the user often comprises a plurality of gas fire composite detectors, which are key protection objects and are generally 'public users'. The dedicated wireless gateway and the field alarm device are typically wired and therefore do not require a terminal communication device.
The field terminal communication equipment, the wireless gateway and the monitoring center are in two-way communication.
The present invention will now be further described with reference to specific embodiments.
As shown in fig. 2, when the system is installed in a domestic kitchen: if the gas fire composite detector 5 detects three parameters of gas (methane or propane), carbon monoxide and temperature, which respectively correspond to three conditions of gas leakage, incomplete combustion and fire, the wireless communication network sends data information in a data memory inside the gas fire composite detector to a monitoring center at regular time, and a data analysis system is used for analyzing to know whether a user has trace gas leakage on site and whether carbon monoxide discharged by a gas appliance exceeds the standard during working, so that the safety of the user is evaluated. When the analysis system finds that the detection parameter data is abnormal, the analysis system gives an alarm, and meanwhile, the gas fire composite detector sends a parameter over-concentration alarm valve closing signal to a gas emergency cut-off module arranged in the membrane type metering device (a safe intelligent gas meter) to cut off a gas source emergently.
In addition, the over-concentration power-off protection device 6 arranged in the circuit is used as a system power supply of the whole low-voltage circuit, the communication adopts a bus communication mode, and the over-concentration power-off protection device 6 can cut off a controlled power supply before the explosion or combustion concentration is reached so as to prevent accidents caused by the power supply being turned on or turned off.
If the pipeline end drops, the gas is discharged suddenly, when the flow exceeds the set safety flow limit value, the overflowing gas safety valve 4 arranged between the indoor gas pipeline and the gas using equipment can close the gas source. The overflowing gas safety valve 4 is matched with a time timer, small leakage and micro leakage occur in a connecting pipe, a gas source is automatically cut off after the timer runs out at the self-designed time of a user, and serious disasters caused by the long-time small leakage and the micro leakage of gas are prevented.
Claims (7)
1. The utility model provides a user's gas potential safety hazard early warning and processing system which characterized in that includes:
a field safety device comprising
The over-concentration power-off protection device arranged on the low-voltage circuit of the user is used as a system power supply of the whole low-voltage circuit,
set up in user's safe intelligent gas table, it has quick action emergency valve and has the integrated chip of following processing module to embed:
-a gas flow over-current emergency shut-off module for signaling a shut-off signal to the emergency shut-off valve to shut off the gas supply urgently when the gas supply flow is outside the range of gas flow required for normal operation of the gas consuming apparatus, and
-a gas pressure fluctuation emergency shut-off module for signaling a shut-off signal to the emergency shut-off valve to shut off the gas supply urgently when the gas supply pressure is outside a pressure range required for normal operation of the gas consuming apparatus, and
gas fire composite detector arranged on user and provided with
-data acquisition means for acquiring gas concentration, carbon monoxide concentration and temperature parameters, and
a data memory for storing parameter data collected by the data acquisition device,
a data analysis and evaluation module for analyzing and evaluating whether the collected parameter data is abnormal,
the control module is used for alarming when the collected parameter data are abnormal, and simultaneously sending a valve closing signal to a built-in gas emergency cut-off module of the safe intelligent gas meter and sending a power-off signal to the over-concentration power-off protection device;
a monitoring center comprises
-a memory for storing parameter data transmitted from the consumer gas fire complex detector, and
-a data analysis system for analytically evaluating whether the received parameter data is abnormal, and
a control processing system, which, in the event of an anomaly in the received parameter data, performs an alarm and subsequent processing,
and the wireless communication network is used for transmitting the data from the field equipment gas fire composite detector to the monitoring center.
2. The user gas safety hazard early warning and processing system of claim 1, characterized in that: the wireless communication network comprises field terminal communication equipment, a wireless gateway and a monitoring center, wherein the wireless gateway is used as a primary management platform to send information from the data terminal communication equipment to the monitoring center.
3. The user gas safety hazard early warning and processing system of claim 2, characterized in that: the wireless gateways comprise group wireless gateways, and each gateway is connected with 200-400 field terminal communication devices; and the special wireless gateway is only connected with one key gas user, and the key gas user is provided with a plurality of gas fire composite detectors.
4. The system for early warning and processing of the potential safety hazard of gas users according to claim 2, wherein the field terminal communication equipment, the wireless gateway and the monitoring center are in two-way communication.
5. The user gas safety hazard early warning and processing system of claim 1, characterized in that: the field safety equipment further comprises a vibration sensing module, the vibration sensing module is connected with the gas fire composite detector and the safe intelligent gas meter through a data line, and transmits a detected vibration signal with destructive intensity of more than 6 degrees to the gas fire composite detector and an integrated chip of the safe intelligent gas meter, so that a cutting signal is sent to the emergency cut-off valve to cut off an air source emergently.
6. The user gas safety hazard early warning and processing system of claim 1, characterized in that: the on-site safety equipment further comprises a miniature gas leakage detector arranged on the quick-mounting pipe joint at the position where the beginning end of the embedded stainless steel corrugated clad pipe is out of the wall, the miniature gas leakage detector detects the gas leakage condition at the position and transmits detection data to the gas fire composite detector.
7. The user gas safety hazard early warning and processing system of claim 1, characterized in that: the on-site safety equipment also comprises an overflowing fuel gas safety valve arranged at the joint of the on-site safety equipment and the gas appliance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012200369455U CN202472377U (en) | 2012-02-06 | 2012-02-06 | Hidden-danger early-warning and processing system for user combustion-gas safety |
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| CN2012200369455U CN202472377U (en) | 2012-02-06 | 2012-02-06 | Hidden-danger early-warning and processing system for user combustion-gas safety |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700225A (en) * | 2013-12-27 | 2014-04-02 | 苏州市海神达机械科技有限公司 | Multifunctional safety switch device |
| CN106287225A (en) * | 2015-06-02 | 2017-01-04 | 齐鲁工业大学 | A kind of combustion gas on-line monitoring early warning system and detection control method thereof |
| CN106402947A (en) * | 2016-11-25 | 2017-02-15 | 上海应用技术大学 | Intelligent gas leakage safety protection device |
| CN109595464A (en) * | 2017-10-03 | 2019-04-09 | 香港中华煤气有限公司 | Gas leakage detection system |
| CN109742857A (en) * | 2019-01-29 | 2019-05-10 | 深圳市卓亚云智能科技有限公司 | A dynamic monitoring method and system for electricity safety with gas leakage alarm |
| CN110223488A (en) * | 2019-06-12 | 2019-09-10 | 德力西电气有限公司 | A kind of anti-explosion device for combustible gas |
| CN110635974A (en) * | 2018-06-21 | 2019-12-31 | 智慧式控股有限公司 | General safety management control and protection system for intelligent household appliances |
| CN109668607B (en) * | 2018-11-21 | 2020-05-29 | 金卡智能集团股份有限公司 | Method for monitoring tiny leakage of gas meter |
| CN112005283A (en) * | 2018-04-02 | 2020-11-27 | 松下知识产权经营株式会社 | Gas shutoff device and wireless device for gas shutoff device |
| CN112284475A (en) * | 2020-09-28 | 2021-01-29 | 广州燃气集团有限公司 | Method for improving over-current alarm precision of intelligent gas meter |
| CN117877194A (en) * | 2024-02-26 | 2024-04-12 | 广州华颂生物科技有限公司 | Gas safety early warning system for smart homes |
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2012
- 2012-02-06 CN CN2012200369455U patent/CN202472377U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700225A (en) * | 2013-12-27 | 2014-04-02 | 苏州市海神达机械科技有限公司 | Multifunctional safety switch device |
| CN106287225A (en) * | 2015-06-02 | 2017-01-04 | 齐鲁工业大学 | A kind of combustion gas on-line monitoring early warning system and detection control method thereof |
| CN106402947A (en) * | 2016-11-25 | 2017-02-15 | 上海应用技术大学 | Intelligent gas leakage safety protection device |
| CN109595464A (en) * | 2017-10-03 | 2019-04-09 | 香港中华煤气有限公司 | Gas leakage detection system |
| CN112005283A (en) * | 2018-04-02 | 2020-11-27 | 松下知识产权经营株式会社 | Gas shutoff device and wireless device for gas shutoff device |
| CN110635974A (en) * | 2018-06-21 | 2019-12-31 | 智慧式控股有限公司 | General safety management control and protection system for intelligent household appliances |
| CN109668607B (en) * | 2018-11-21 | 2020-05-29 | 金卡智能集团股份有限公司 | Method for monitoring tiny leakage of gas meter |
| CN109742857A (en) * | 2019-01-29 | 2019-05-10 | 深圳市卓亚云智能科技有限公司 | A dynamic monitoring method and system for electricity safety with gas leakage alarm |
| CN110223488A (en) * | 2019-06-12 | 2019-09-10 | 德力西电气有限公司 | A kind of anti-explosion device for combustible gas |
| CN112284475A (en) * | 2020-09-28 | 2021-01-29 | 广州燃气集团有限公司 | Method for improving over-current alarm precision of intelligent gas meter |
| CN112284475B (en) * | 2020-09-28 | 2022-03-25 | 广州燃气集团有限公司 | Method for improving over-current alarm precision of intelligent gas meter |
| CN117877194A (en) * | 2024-02-26 | 2024-04-12 | 广州华颂生物科技有限公司 | Gas safety early warning system for smart homes |
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