A method and system for automatically shutting down a combustible gas pipeline in extreme environments

Abstract

The present invention discloses a method and system for automatically closing a combustible gas pipeline under extreme environments. The method adopts a plurality of professional detection sensors for extreme environments, which respectively detect various extreme environments including but not limited to fire, flood, earthquake, high temperature, leakage of various combustible gases, excessive combustible dust, excessive carbon monoxide, and dumping of gas-using equipment. That is, the system includes eight sensors, the sensors are connected to a host, and the host is connected to a primary solenoid valve, a secondary solenoid valve, an audible and visual alarm, a GPRS alarm module, and a power supply. After the sensor detects an extreme environment, it drives an execution circuit to close the electromagnetic valve of the combustible gas pipeline at this level and the electromagnetic valve of the combustible gas pipeline at the previous level, and the audible and visual alarm starts to work. At the same time, the GPRS alarm module is mounted using an expansion interface, and the information of the automatic closure of the combustible gas pipeline due to the extreme environment is sent to a designated mobile phone, so that the leadership organization and the fire department can intervene in the rescue and disaster relief in advance.

Description

Technical Field

[0001] The present invention belongs to the category of automatic protection of combustible gas pipelines, and specifically relates to a method and system for automatically shutting down a combustible gas pipeline under extreme conditions. Background Art

[0002] With the development and progress of society, gas pipelines are widely used in various industries. However, in extreme environments such as fire, flood, earthquake, high temperature, gas leakage, excessive combustible dust, excessive carbon monoxide, and dumping of gas equipment, unclosed gas pipelines may cause secondary disasters, which will cause huge damage to life and property. In addition, in extreme environments, due to the harsh environment and panic of personnel, it is difficult to complete the closing of gas pipeline valves while taking emergency shelters, and the closing efficiency is low and the risk factor is high. Even if the gas pipeline valve on the equipment end is closed, under certain disasters, once the pipeline is affected by high temperature, explosion, earthquake, etc., causing physical damage to the pipeline, it will also cause secondary disasters, so it is equally important to close the gas pipeline entering the house at the same time. Summary of the invention

[0003] The purpose of the present invention is to provide a method and system for automatically closing a combustible gas pipeline under extreme environments. The method and system can be used in extreme environments such as fire, flood, earthquake, high temperature, combustible gas leakage, smoke, and overturned gas-using equipment. When the sensor detects the extreme environment, it generates a trigger signal to drive the execution circuit, which can shut off the gas supply at the device end and the gas supply at the household end in one second. The sound and light alarm and the GPRS alarm module work at the same time, which is safe and reliable, and the shutdown is simple and convenient.

[0004] The technical solution of the present invention:

[0005] A method for automatically closing a gas pipeline under extreme conditions, using multiple extreme environment professional detection sensors, which respectively detect various extreme environments including but not limited to: fire, flood, earthquake, high temperature, leakage of various gaseous gases, excessive combustible dust, excessive carbon monoxide, and dumping of gas-using equipment. After the sensor detects the extreme environment, it drives the execution circuit to close the electromagnetic valve of the gas pipeline at this level, close the electromagnetic valve of the gas pipeline at the previous level, and the sound and light alarm starts to work; at the same time, the GPRS alarm module is mounted using the expansion interface, and the information of the automatic closure of the gas pipeline due to the extreme environment is sent to a designated mobile phone, so that the leadership organization and the fire department can intervene in the rescue and disaster relief in advance.

[0006] The system adopted by the method for automatically closing a combustible gas pipeline under the above-mentioned extreme environment includes eight sensors, the sensors are connected to a host, and the host is connected to a primary solenoid valve, a secondary solenoid valve, an audible and visual alarm, a GPRS alarm module and a power supply; the eight sensors include a combustible gas sensor, a carbon monoxide sensor, a humidity sensor, a flame sensor, a smoke sensor and / or a combustible dust sensor, a vibration sensor, a temperature sensor, a water level sensor and / or a tipping sensor; the combustible gas sensor is composed of a combustible gas sensor with a gas specific gravity smaller than that of air and a combustible gas sensor with a gas specific gravity larger than that of air; the primary solenoid valve and the secondary solenoid valve are respectively arranged on the pipeline, the pipeline is connected to the gas-using equipment, and the primary solenoid valve is located at the gas inlet, and the secondary solenoid valve is located on the pipeline between the primary solenoid valve and the gas-using equipment;

[0007] The host is connected to an OUT1 coupling circuit, the OUT1 coupling circuit is connected to a dual-channel MOS control delay circuit, the dual-channel MOS control delay circuit adopts a dual-channel MOS control delay circuit finished product module, the dual-channel MOS control delay circuit OUT coupling circuit is connected to a first relay, the first relay is connected to a two-way feedback remote control switch remote control, the two-way feedback remote control switch remote control is connected to a two-way feedback remote control switch through remote control, the two-way feedback remote control switch adopts a HK-FK1-2200X two-way feedback remote control switch finished product module with a timing function and a remote control, the timing version is selected in seconds, and the two-way feedback remote control switch is connected to a primary solenoid valve; the host is connected to an OUT1 coupling circuit, the OUT1 coupling circuit is connected to a dual-channel MOS control delay circuit, the dual-channel MOS control delay circuit is connected to a solid relay switch, and the solid relay switch is connected to a secondary solenoid valve; a manual solenoid valve switch is provided on the dual-channel MOS control delay circuit; the secondary solenoid valve and the primary solenoid valve are all provided with manual reset switches.

[0008] Furthermore, the host is an eight-way buzzer electronic circuit designed with a digital circuit, and the buzzer in the eight-way buzzer electronic circuit designed with a digital circuit is changed to two groups of parallel photoelectric couplers U9-U10; the push switches S1-S8 in the eight-way buzzer electronic circuit designed with a digital circuit are replaced by photoelectric couplers U1-U8, and the photoelectric couplers U1-U8 are respectively connected to the photoelectric couplers on the eight sensors, and a current limiting resistor R0 is provided between the photoelectric coupler U1-U8 and the power supply, and the current limiting resistor R0 adopts a 1 / 8 watt ordinary carbon film resistor; a reset switch and a digital tube are provided on the host, and the reset switch adopts a lock-free push button switch.

[0009] Furthermore, the dual-channel MOS controlled delay circuit OUT coupling circuit is connected to a first relay, specifically, the dual-channel MOS controlled delay circuit OUT end is connected in parallel with the solid relay switch IN end; the solid relay switch adopts SSR-10 DA solid relay; the first-level solenoid valve and the second-level solenoid valve both adopt explosion-proof solenoid cut-off valves with manual reset switches; the two-way feedback remote control switch remote controller is connected in parallel with the two contacts of the first relay.

[0010] Furthermore, the host is connected to an OUT2 coupling circuit, the OUT2 coupling circuit is connected to two coupling circuits, one of which is connected to an audible and visual alarm, and the other is connected to a second relay, the second relay is connected to a GPRS alarm module, and the GPRS alarm module adopts an intelligent cloud alarm; the two contacts of the second relay are connected in parallel at both ends of the magnetic alarm switch of the GPRS alarm module.

[0011] Furthermore, the combustible gas sensor whose gas specific gravity is smaller than that of air is located at 20-40 cm from the top surface; and the combustible gas sensor whose gas specific gravity is larger than that of air is located at 20-40 cm from the ground.

[0012] Furthermore, the carbon monoxide sensor is located 20-40 cm away from the top surface.

[0013] Furthermore, the water level sensor is installed at a distance of 5-15 cm from the ground; and the tipping sensor is located in the middle of the gas-using equipment.

[0014] Furthermore, the humidity sensor, flame sensor, smoke sensor or combustible dust sensor, vibration sensor and temperature sensor are located between the top surface and the ground.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] During use, when the sensor detects an extreme environment, the sensor module sends out a trigger signal. After the trigger signal is amplified by the host, the first-level solenoid valve and the second-level solenoid valve are shut down in one second. At the same time, the trigger signal is amplified by the host to activate the sound and light alarm and the GPRS alarm module. The sound and light alarm gives out a sound and light alarm, while the GPRS alarm module sends a notification to the relevant mobile phone holders that the combustible gas pipeline has been automatically closed in an extreme environment through telephone recording, text messages, APP, mini-programs, etc.

[0017] Release the shutdown: When the extreme environment is lifted, the host reset switch is triggered, and the host sends a signal to restore the sound and light alarm and GPRS alarm module to their initial states; while the host is reset, the reset switches of the first-level solenoid valve and the second-level solenoid valve are manually restored to their initial states, that is, the system re-enters the standby state.

[0018] The host of the present invention adopts the electronic circuit diagram of the eight-way buzzer designed by the digital circuit in the existing products, and changes the buzzer in the electronic circuit of the eight-way buzzer designed by the digital circuit into two groups of parallel photoelectric couplers U9-U10 to avoid mutual interference between different execution circuits; the key switches S1-S8 in the electronic circuit of the eight-way buzzer designed by the digital circuit are replaced by photoelectric couplers U1-U8 to obtain better anti-interference performance, and the photoelectric couplers U1-U8 are respectively connected to the photoelectric couplers on 8 sensors to form a dual-photocoupler closed-loop transmission circuit, and in order to protect the photoelectric couplers U1-U8, a current limiting resistor R0 is added between the photoelectric couplers U1-U8 and the power supply, and the current limiting resistor R0 adopts a 1 / 8 watt ordinary carbon film resistor, and the resistance value is determined according to the power supply voltage and the photoelectric couplers U1-U8. 22 The specific model is determined to obtain the host of the present invention, and the host is reset by a reset switch without a lock button. It is simple and convenient to use. At the same time, the number displayed on the digital tube on the host is the number of the triggered sensor, which intuitively shows the type of extreme environment. This is important for timely grasping the type of disaster and taking corresponding risk elimination measures, especially for early warning of excessive colorless and odorless carbon monoxide and prevention of disasters. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a system diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the present invention;

[0021] Figure 3 It is a normally open connection circuit triggered by the intelligent cloud alarm of the present invention;

[0022] Figure 4 It is a normally closed connection circuit triggered by the intelligent cloud alarm of the present invention;

[0023] Figure 5 It is a digital circuit design eight-way buzzer electronic circuit diagram;

[0024] Figure 6 It is a circuit diagram of the host of the present invention;

[0025] Figure 7 It is a connection schematic diagram of the present invention.

[0026] Markings in the figure: 1-top surface, 2-combustible gas sensor with a gas density lower than that of air, 3-carbon monoxide sensor, 4-sound and light alarm, 5-power supply, 6-GPRS alarm module, 7-reset switch, 8-humidity sensor, 9-flame sensor, 10-smoke sensor or combustible dust sensor, 11-host, 12-vibration sensor, 13-temperature sensor, 14-water level sensor, 15-combustible gas sensor with a gas density higher than that of air, 16-ground, 17-gas-using equipment, 18-dumping sensor, 19- Secondary solenoid valve, 20-pipeline, 21-primary solenoid valve, 22-photocoupler U1-U8, 23-OUT1 coupling circuit, 24-dual-channel MOS control delay circuit, 25-bidirectional feedback remote control switch, 26-coupling circuit, 27-OUT2 coupling circuit, 28-sensor, 29-manual solenoid valve cut-off switch, 30-dual-channel MOS control delay circuit OUT coupling circuit, 31-solid relay switch, 32-first relay, 33-bidirectional feedback remote control switch remote controller, 34-second relay. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0028] See also Figure 1 A method for automatically closing a gas pipeline under extreme conditions uses a plurality of professional extreme environment detection sensors, which respectively detect various extreme environments including but not limited to: fire, flood, earthquake, high temperature, leakage of various gaseous gases, excessive combustible dust, excessive carbon monoxide, and dumping of gas-using equipment. After the sensor detects the extreme environment, it drives the execution circuit to close the electromagnetic valve of the gas pipeline at this level and the electromagnetic valve of the gas pipeline at the previous level, and the sound and light alarm starts to work; at the same time, the GPRS alarm module is mounted using the expansion interface to send the information of the automatic closure of the gas pipeline due to the extreme environment to the designated mobile phone, so that the leadership and fire department can intervene in the rescue and disaster relief in advance.

[0029] like Figure 2 The system used in the method for automatically shutting down a gas pipeline in an extreme environment includes eight sensors. Figure 7 The 28, 8 types of sensors represented are connected to a host 11, and the host 11 is connected to a primary solenoid valve 21, a secondary solenoid valve 19, an audible and visual alarm 4, a GPRS alarm module 6 and a power supply 5;

[0030] The eight sensors 28 include a combustible gas sensor, a carbon monoxide sensor 3, a humidity sensor 8, a flame sensor 9, a smoke sensor and / or a combustible dust sensor 10, a vibration sensor 12, a temperature sensor 13, a water level sensor 14 and / or a tipping sensor 18;

[0031] The combustible gas sensor is composed of a combustible gas sensor 2 whose gas specific gravity is smaller than that of air and a combustible gas sensor 15 whose gas specific gravity is larger than that of air;

[0032] The first-level solenoid valve 21 and the second-level solenoid valve 19 are respectively arranged on the pipeline 20, the pipeline 20 is connected to the gas-using equipment 17, and the first-level solenoid valve 21 is located at the gas inlet, and the second-level solenoid valve 19 is located on the pipeline 20 between the first-level solenoid valve 21 and the gas-using equipment 17.

[0033] When the present invention is used, when one of the eight sensors 28 detects an extreme environment, the module related to the sensor 28 sends a trigger signal. After the trigger signal is amplified by the host 11, the first-level solenoid valve 21 and the second-level solenoid valve 19 can be shut down in one second; at the same time, the trigger signal is amplified by the host to make the sound and light alarm 4 and the GPRS alarm module 6 work, the sound and light alarm 4 makes a sound and light alarm, and the GPRS alarm module 6 sends a notification to the relevant mobile phone holder that the combustible gas pipeline has been automatically closed in an extreme environment through telephone recording, text messages, APP, small programs, etc.

[0034] Release the shutdown: When the extreme environment is released, the reset switch 7 of the host 11 is triggered, and the host 11 sends a signal to restore the sound and light alarm 4 and the GPRS alarm module 6 to their initial states; while the host 11 is reset, the reset switches of the first-level solenoid valve 21 and the second-level solenoid valve 19 are manually restored to their initial states, that is, the present invention re-enters the standby state.

[0035] The host 11 is an eight-way buzzer electronic circuit designed with a digital circuit, and the buzzer in the eight-way buzzer electronic circuit designed with a digital circuit is replaced with two sets of parallel photoelectric couplers U9-U10; the key switches S1-S8 in the eight-way buzzer electronic circuit designed with a digital circuit are replaced with photoelectric couplers U1-U8 22, and the photoelectric couplers U1-U8 22 are respectively connected to the photoelectric couplers on 8 types of sensors 28, and a current limiting resistor R0 is provided between the photoelectric coupler U1-U8 22 and the power supply 5, and the current limiting resistor R0 adopts a 1 / 8 watt ordinary carbon film resistor; a reset switch 7 and a digital tube are provided on the host 11, and the reset switch 7 adopts a lock-free button switch.

[0036] The host 11 adopts the digital circuit design of the existing commodity eight-way buzzer electronic circuit diagram as shown in Figure 5As shown, by changing the buzzer in the digital circuit design eight-way buzzer electronic circuit into two groups of parallel photoelectric couplers U9-U10, mutual interference between different execution circuits is avoided; the key switches S1-S8 in the digital circuit design eight-way buzzer electronic circuit are replaced with photoelectric couplers U1-U8 22 to obtain better anti-interference performance, and the photoelectric couplers U1-U8 22 are respectively connected to the photoelectric couplers on the eight sensors 28 to form a dual-photocoupler closed-loop transmission circuit, and in order to protect the photoelectric couplers U1-U8 22, a current limiting resistor R0 is added between the photoelectric couplers U1-U8 22 and the power supply 5. The current limiting resistor R0 adopts a 1 / 8 watt ordinary carbon film resistor, and the resistance value is determined according to the power supply voltage and the specific model of the photoelectric coupler U1-U8 22, and the host 11 of the present invention is obtained. The circuit diagram of the host is as shown in Figure 6 As shown; and the host 11 is reset by the reset switch 7 without a lock button, which is simple and convenient to use. At the same time, the number displayed on the digital tube on the host 11 is the number of the triggered sensor, which intuitively shows the type of extreme environment. This is important for timely grasping the type of disaster and taking corresponding risk elimination measures, especially for early warning of excessive colorless and odorless carbon monoxide and prevention of disasters.

[0037] The host 11 is connected to an OUT1 coupling circuit 23, the OUT1 coupling circuit 23 is connected to a dual-channel MOS control delay circuit 24, the dual-channel MOS control delay circuit 24 adopts a dual-channel MOS control delay circuit finished module, the dual-channel MOS control delay circuit OUT coupling circuit 30 is connected to a first relay 32, the first relay 32 is connected to a two-way feedback remote control switch remote controller 33, the two-way feedback remote control switch remote controller 33 is connected to a two-way feedback remote control switch 25 through remote control, and the two-way feedback remote control switch 25 adopts HK-FK1-2200 with a timing function and a remote controller. X bidirectional feedback remote control switch finished product module, the timing version is selected in seconds, the bidirectional feedback remote control switch 25 is connected to the first-level solenoid valve 21; the host 11 is connected to the OUT1 coupling circuit 23, the OUT1 coupling circuit 23 is connected to the dual-channel MOS control delay circuit 24, the dual-channel MOS control delay circuit 24 is connected to the solid relay switch 31, and the solid relay switch 31 is connected to the second-level solenoid valve 19; the dual-channel MOS control delay circuit 24 is provided with a manual solenoid valve cut-off switch 29; the second-level solenoid valve 19 and the first-level solenoid valve 21 are all provided with manual reset switches, such as Figure 7 shown.

[0038] When the present invention is used, the trigger signal is amplified by the host 11, and then passes through the OUT1 coupling circuit 23, the dual-channel MOS control delay circuit 24, the first relay 32, the two-way feedback remote control switch remote controller 33 and the two-way feedback remote control switch 25, so that the first-level solenoid valve 21 is turned off; at the same time, the trigger signal passes through the OUT1 coupling circuit 23, the two-way MOS control delay circuit 24, the solid relay switch 31 and the second-level solenoid valve 19, so that the second-level solenoid valve 19 is turned off. If an extreme environmental warning is obtained in advance, the manual solenoid valve cut-off switch 29 can be manually turned off to force the first-level solenoid valve 21 and the second-level solenoid valve 19 to be turned off;

[0039] Since the primary solenoid valve 21 and the secondary solenoid valve 19 are not in the same space, in order to quickly shut down the household valve 21 after receiving an extreme environmental warning, the present invention designs two artificial remote manual solenoid valve solutions: Solution 1 is a manual solenoid valve cut-off switch 29 of a dual-channel MOS control delay circuit, which forcibly shuts down the primary solenoid valve 21 and the secondary solenoid valve 19. Solution 2 is a two-way feedback remote control switch remote controller 33, which forcibly shuts down the primary solenoid valve 21.

[0040] Release the shutdown: After triggering the reset switch 7 of the host 11, the host 11 sends a signal to restore the sound and light alarm 4 and the GPRS alarm module 6 to the initial state. After the first-level solenoid valve 21 and the second-level solenoid valve 19 are manually reset by the manual reset switch, the present invention can re-enter the standby state.

[0041] The present invention adopts a dual-channel MOS control delay circuit 24, and can select working parameters according to the characteristics of the first-level solenoid valve 21 and the second-level solenoid valve 19. For example, the working parameter is selected as 1 second timing, the working mode is selected as P1.1, and the signal is invalid when triggered again.

[0042] Specifically, the dual-channel MOS control delay circuit 24 adopts the existing product "dual-channel MOS control delay circuit finished module", which can provide one-second working timing, and the circuit module has high-frequency, fast and frequent on-off, unlimited switching times, and the high-level trigger DC 3.0V-24V signal ground is not shared with the system ground to improve the system's anti-interference ability. It can also short-circuit the common ground by itself, the operating temperature is -40-85℃, with optical coupler isolation, enhanced anti-interference ability, industrial-grade circuit board, and the set parameters are always remembered after power failure, achieving stability and reliability.

[0043] The present invention adopts a two-way feedback remote control switch 25 to select working parameters according to the characteristics of the first-level electromagnetic valve 21, for example, the working parameter is selected as 1 second timing.

[0044] Specifically, the two-way feedback remote control switch adopts the existing product "25HK-FK1-2200X upgraded two-way feedback remote control switch", which has two versions, standard and fast, in terms of control speed and distance: the standard version receives the transmission signal in about 1 second, and the control distance is farther, up to 5000 meters; the fast version receives the transmission signal in about 0.3 seconds, and the control distance can reach up to 3000 meters; in terms of timing, there are two versions, one in minutes and one in seconds. The present invention uses the version in seconds.

[0045] The dual-channel MOS control delay circuit OUT coupling circuit 30 is connected to the first relay 32, specifically, the dual-channel MOS control delay circuit 24 OUT terminal is connected in parallel with the solid relay switch 31 IN terminal; the solid relay switch 31 adopts SSR-10 DA solid relay; the first-level solenoid valve 21 and the second-level solenoid valve 19 both adopt explosion-proof solenoid cut-off valves with manual reset switches; the two-way feedback remote control switch remote controller 33 is connected in parallel with the two contacts of the first relay 32, such as Figure 7 shown.

[0046] The bidirectional feedback remote control switch 25 of the present invention adopts the HK-FK1-2200X bidirectional feedback remote control switch finished product module with a timing function and a remote control, and the timing version is selected in seconds. The "on" key circuit of the bidirectional feedback remote control switch remote control 33 is connected in parallel with an extension line and connected to the two contacts of the first relay 32; when one of the 8-way sensors 28 detects an extreme environment, the module related to the sensor 28 sends a trigger signal, and the related photoelectric coupler path in the photoelectric coupler U1-U8 22 triggers the host 11. The host 11 displays the corresponding sensor number through the digital tube, and informs the type of extreme environment. At the same time, the host 11 sends a trigger signal to the dual-way MOS control delay circuit 24 through the OUT1 coupling circuit 23. The triggered dual-way MOS control delay circuit 24 generates a 1-second timing signal, which is turned on through the OUT of the dual-way MOS control delay circuit 24. The OUT of the dual-way MOS control delay circuit OUT coupling circuit 30 is turned on, and the first relay 32 is turned on. The first relay 32 uses a small sealed relay, and the "on" key circuit of the bidirectional feedback remote control switch remote control 33 is turned on. The parallel extension line is short-circuited, and the "on" key sends out an opening signal, and the two-way feedback remote control switch remote controller 33 remotely controls the two-way feedback remote control switch 25 to work, and sends out a one-second timing signal, and the circuit of the first-level electromagnetic valve 21 is powered on and turned off; at the same time, the host 11 sends a trigger signal to the two-way MOS control delay circuit 24 through the OUT1 coupling circuit 23, and the triggered two-way MOS control delay circuit 24 generates a 1-second timing signal, which triggers the IN end of the solid relay switch 31 through the OUT end of the two-way MOS control delay circuit 24. The solid relay switch 31 obtains a 1-second conduction time, triggering the circuit of the second-level electromagnetic valve 19 to be powered on and turned off. Note: The electromagnetic shut-off valve can only withstand a one-second shutdown working pulse, and the two-way feedback remote control switch 25 only needs one second of working time after being triggered by the remote control. The two-way feedback remote control switch 25 has a timing working state and a non-timing working state, and the present invention uses a timing working state.

[0047] The two-way feedback remote control switch 25 is connected in parallel to the "on" key circuit of the two-way feedback remote control switch 33 using an extension line. The two-way feedback remote control switch 25 is not damaged. In an emergency, the two-way feedback remote control switch 33 can be used to manually shut down the first-level solenoid valve 21.

[0048] The dual-channel MOS controlled delay circuit OUT coupling circuit 30 is connected to a first relay 32, specifically, the dual-channel MOS controlled delay circuit 24 OUT end is connected in parallel with the solid relay switch 31 IN end; the solid relay switch 31 adopts SSR-10DA solid relay; the first-level solenoid valve 21 and the second-level solenoid valve 19 both adopt explosion-proof solenoid cut-off valves with manual reset switches; the two-way feedback remote control switch remote controller 33 is connected in parallel with the two contacts of the first relay 32.

[0049] The first-stage solenoid valve 21 and the second-stage solenoid valve 19 adopt the existing explosion-proof electromagnetic cut-off valve, which is normally open (pulse power-on closed, manual reset), safe and reliable.

[0050] The host 11 is connected to an OUT2 coupling circuit 27, and the OUT2 coupling circuit 27 is connected to two coupling circuits 26, one of which is connected to an audible and visual alarm 4, and the other coupling circuit 26 is connected to a second relay 34, and the second relay 34 is connected to a GPRS alarm module 6, and the GPRS alarm module 6 adopts an intelligent cloud alarm; the two contacts of the second relay 34 are connected in parallel to the two ends of the magnetic alarm switch of the GPRS alarm module 6, such as Figure 7 shown.

[0051] The OUT2 coupling circuit 27 of the host 11 is respectively connected to the control circuit IN of the GPRS alarm module 6. Figure 3 , coupling circuit 26 and the control circuit IN end coupling circuit 26 of the sound and light alarm 4 form a dual optical coupling closed-loop transmission circuit, which greatly improves the circuit's anti-interference ability.

[0052] The GPRS alarm module 6 adopts the existing commodity "intelligent cloud alarm", and the magnetic switch of the intelligent cloud alarm is used as the alarm trigger switch, which has two types: one is normally open type, and the other is normally closed type.

[0053] Normally open connection circuit such as Figure 4 As shown: the normally open control circuit IN end coupling circuit 26 is connected to the OUT2 coupling circuit 27 of the host 11, and a normally open relay output is adopted. The second relay 34 of this circuit uses a normally open relay, and the two contacts are connected in parallel at both ends of the magnetic alarm switch of the GPRS alarm module 6; the normally closed connection circuit is as shown Figure 4 As shown: the normally closed control circuit IN end is connected to the OUT2 coupling circuit 27 of the host 11, and the second relay 34 is used for output. The second relay 34 of this circuit uses a normally closed relay, and the two contacts are connected in parallel at both ends of the magnetic alarm switch of the GPRS alarm module 6. Since the second relay 34 works in a flammable and explosive environment and works in a micro-current state, the second relay 34 uses a small sealed relay.

[0054] The combustible gas sensor 2 with a gas specific gravity smaller than that of air is located at 20-40 cm from the top surface 1; the combustible gas sensor 15 with a gas specific gravity larger than that of air is located at 20-40 cm from the ground 16; the detection of target combustible gas or other gas with a gas specific gravity smaller than that of air and combustible gas or other gas with a gas specific gravity larger than that of air is achieved.

[0055] The carbon monoxide sensor 3 is located 20-40 cm away from the top surface 1, so as to detect carbon monoxide gas having a smaller specific gravity than air.

[0056] The water level sensor 14 is installed at a distance of 5-15 cm from the ground 16; the tipping sensor 18 is located in the middle of the gas-using equipment 17; the water level sensor 14 and the tipping sensor 18 are stable and reliable in extreme environments.

[0057] The humidity sensor 8, flame sensor 9, smoke sensor or combustible dust sensor 10, vibration sensor 12 and temperature sensor 13 are located between the top surface 1 and the ground 16. Different sensors can be selected for the sensor 28 according to the actual production environment, so as to achieve a wide range of applications and easy use.

[0058] The present invention has the following characteristics:

[0059] 1. The signal transmission of the present invention all adopts photoelectric coupler: the closed-loop conduction of photoelectric coupler has high anti-interference performance and can be used in more complex electromagnetic environment.

[0060] 2. The power switch of the present invention is entirely composed of solid-state relays, bidirectional thyristors and MOC modules, which avoids arcing of high-power relay contacts and causes secondary disasters. The two relays that must be used are also micro-current small sealed relays.

[0061] 3. The present invention adopts a large number of mature commercial components and has higher reliability.

[0062] 4. The present invention adopts 8-way sensor probe input, which provides protection for more types of disasters. It can also form a combustible gas probe detection matrix to provide safer protection. If the production environment has high safety factor requirements and 8-way sensor probes are still not enough, multiple host computers can be used in parallel.

[0063] 5. The host of the present invention provides a digital display function, which can quickly find out the cause of the accident based on the pre-defined.

[0064] 6. The present invention provides a design for remotely shutting off the combustible gas valve of the previous level, which can control the scope of the disaster more efficiently.

[0065] 7. The present invention provides a design for remote disaster notification, which allows relevant leaders and fire-fighting agencies to engage in rescue work as soon as possible, and can effectively reduce the probability of disaster expansion.

[0066] 8. The present invention provides a design of two manual shut-off switches, which can efficiently shut off the combustible gas valve under the premise of early warning, effectively preventing the occurrence of secondary disasters.

[0067] In summary, the present invention can be used in extreme environments such as fire, flood, earthquake, high temperature, combustible gas leakage, smoke, and toppling of gas-using equipment. In order to reduce false alarms of sensors and better adapt to complex electromagnetic environments, all sensor signal transmissions adopt dual optocoupler closed-loop transmission circuits, which greatly improves the reliability of the system. When the sensor detects an extreme environment, it drives the execution circuit to shut down the gas supply end and the solenoid valve of the gas-using equipment, the sound and light alarm and the GPRS alarm module in one second, and they work simultaneously, which is safe and reliable, and the shutdown is simple and convenient to release.

Claims

1. A method for automatically closing a gas pipeline under extreme conditions, characterized in that: It uses multiple extreme environment professional detection sensors, which can detect various extreme environments including fire, flood, earthquake, high temperature, multiple combustible gas leakage, excessive combustible dust, excessive carbon monoxide, and gas equipment dumping. After the sensor detects the extreme environment, it drives the execution circuit to shut down the electromagnetic valve of the current level of the combustible gas pipeline, shut down the electromagnetic valve of the previous level of the combustible gas pipeline, and the sound and light alarm starts to work; at the same time, the expansion interface is used to mount the GPRS alarm module, and the information of the automatic closure of the combustible gas pipeline due to extreme environment is sent to the designated mobile phone, so that the leadership and fire department can intervene in the rescue and disaster relief in advance; The system used includes eight sensors (28), the sensors (28) are connected to a host (11), and the host (11) is connected to a primary solenoid valve (21), a secondary solenoid valve (19), an audible and visual alarm (4), a GPRS alarm module (6), and a power supply (5); The eight sensors (28) include a combustible gas sensor, a carbon monoxide sensor (3), a humidity sensor (8), a flame sensor (9), a smoke sensor and / or a combustible dust sensor (10), a vibration sensor (12), a temperature sensor (13), a water level sensor (14) and / or a tipping sensor (18); The combustible gas sensor comprises a combustible gas sensor (2) whose gas specific gravity is smaller than that of air and a combustible gas sensor (15) whose gas specific gravity is larger than that of air; The first-level solenoid valve (21) and the second-level solenoid valve (19) are respectively arranged on a pipeline (20), the pipeline (20) is connected to the gas-using equipment (17), and the first-level solenoid valve (21) is located at the gas inlet, and the second-level solenoid valve (19) is located on the pipeline (20) between the first-level solenoid valve (21) and the gas-using equipment (17); The host (11) is connected to an OUT1 coupling circuit (23), the OUT1 coupling circuit (23) is connected to a dual-channel MOS control delay circuit (24), the dual-channel MOS control delay circuit (24) adopts a dual-channel MOS control delay circuit finished product module, the dual-channel MOS control delay circuit OUT coupling circuit (30) is connected to a first relay (32), the first relay (32) is connected to a bidirectional feedback remote control switch remote controller (33), the bidirectional feedback remote control switch remote controller (33) is connected to a bidirectional feedback remote control switch (25) through remote control, and the bidirectional feedback remote control switch (25) adopts a HK-FK1-2200X dual-channel MOS control circuit with a timing function and a remote controller. A finished module of a two-way feedback remote control switch, wherein the timing version is selected in seconds, wherein the two-way feedback remote control switch (25) is connected to a primary electromagnetic valve (21); the host (11) is connected to an OUT1 coupling circuit (23), the OUT1 coupling circuit (23) is connected to a dual-channel MOS control delay circuit (24), the dual-channel MOS control delay circuit (24) is connected to a solid relay switch (31), and the solid relay switch (31) is connected to a secondary electromagnetic valve (19); a manual electromagnetic valve cut-off switch (29) is provided on the dual-channel MOS control delay circuit (24); and the secondary electromagnetic valve (19) and the primary electromagnetic valve (21) are all provided with manual reset switches.

2. The method for automatically closing a gas pipeline under extreme conditions according to claim 1, characterized in that: The host (11) is an eight-way buzzer electronic circuit designed with a digital circuit, and the buzzer in the eight-way buzzer electronic circuit designed with a digital circuit is replaced by two sets of parallel photoelectric couplers U9-U10; The key switches S1-S8 in the electronic circuit of the eight-way buzzer are replaced by photoelectric couplers U1-U8 (22). The photoelectric couplers U1-U8 (22) are respectively connected to the photoelectric couplers on the eight sensors (28), and a current limiting resistor R0 is provided between the photoelectric couplers U1-U8 (22) and the power supply (5). The current limiting resistor R0 adopts a 1 / 8 watt ordinary carbon film resistor. The host (11) is provided with a reset switch (7) and a digital tube, and the reset switch (7) adopts a lockless push button switch.

3. The method for automatically closing a gas pipeline under extreme conditions according to claim 1 is characterized in that: The dual-channel MOS controlled delay circuit OUT coupling circuit (30) is connected to a first relay (32), specifically, the dual-channel MOS controlled delay circuit (24) OUT terminal is connected in parallel to the solid relay switch (31) IN terminal; the solid relay switch (31) adopts an SSR-10 DA solid relay; the first-level solenoid valve (21) and the second-level solenoid valve (19) both adopt explosion-proof solenoid cut-off valves with manual reset switches; the two-way feedback remote control switch remote controller (33) is connected in parallel to two contacts of the first relay (32).

4. The method for automatically closing a gas pipeline under extreme conditions according to claim 1 is characterized in that: The host (11) is connected to an OUT2 coupling circuit (27), the OUT2 coupling circuit (27) is connected to two coupling circuits (26), one of the coupling circuits (26) is connected to an audible and visual alarm (4), the other coupling circuit (26) is connected to a second relay (34), the second relay (34) is connected to a GPRS alarm module (6), the GPRS alarm module (6) adopts an intelligent cloud alarm; two contacts of the second relay (34) are connected in parallel to the two ends of a magnetic alarm switch of the GPRS alarm module (6).

5. The method for automatically closing a gas pipeline under extreme conditions according to claim 1 is characterized in that: The combustible gas sensor (2) having a gas specific gravity smaller than that of air is located 20-40 cm from the top surface (1); and the combustible gas sensor (15) having a gas specific gravity larger than that of air is located 20-40 cm from the ground surface (16).

6. The method for automatically closing a gas pipeline under extreme conditions according to claim 1 is characterized in that: The carbon monoxide sensor (3) is located 20-40 cm away from the top surface (1).

7. The method for automatically closing a gas pipeline under extreme conditions according to claim 1 is characterized in that: The water level sensor (14) is installed at a distance of 5-15 cm from the ground (16); the tipping sensor (18) is located in the middle of the gas-using equipment (17).

8. The method for automatically closing a gas pipeline under extreme conditions according to claim 1 is characterized in that: The humidity sensor (8), the flame sensor (9), the smoke sensor or the combustible dust sensor (10), the vibration sensor (12) and the temperature sensor (13) are located between the top surface (1) and the ground (16).

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