A new gas alarm

Abstract

The utility model relates to alarm technical field provides a novel gas alarm, including gas alarm host computer, gas sensor and solenoid valve controller, and gas alarm host computer includes first central processing unit, first 433MHz radio frequency module, 4G network transmission module, smart phone, cloud server and alarm, and solenoid valve controller includes second central processing unit, second 433MHz radio frequency module, solenoid valve, and first central processing unit compares after receiving gas sensor detection information with the gas concentration threshold value that first central processing unit internally stored setting compares after exceeding the gas concentration threshold value that setting, and when first central processing unit communicates the control instruction to second central processing unit through the second 433MHz radio frequency module of solenoid valve controller through first 433MHz radio frequency module with the first central processing unit. The utility model solves the problem that the existing gas alarm adopts one-way control and cannot real-time feedback valve state exists instruction execution invalid risk.

Description

Technical Field

[0001] This utility model relates to the field of alarm technology, and in particular to a novel gas alarm. Background Technology

[0002] A gas alarm is a gas leak detection and alarm instrument. When a gas leaks in an industrial environment, and the gas alarm detects that the gas concentration has reached the critical point set by explosion or poisoning alarms, it will issue an alarm signal to remind workers to take safety measures. Gas alarms are similar to automatic fire extinguishers and can be installed to drive ventilation, shut-off, and sprinkler systems to prevent explosions, fires, and poisoning accidents, thereby ensuring safe production. Gas alarms can detect the concentration of various gases. They are frequently used in chemical plants, oil fields, gas stations, steel mills, and other places where gas leaks are possible. Gas is a combustible gas; common gaseous gases include liquefied petroleum gas (LPG), manufactured gas, and natural gas. A gas leak detector is a detector that detects the concentration of gas. Its core component is a gas-sensitive sensor, which is installed in places where gas leaks may occur. When the concentration of gas in the air exceeds a set value, the detector will be triggered and will emit an audible and visual alarm signal.

[0003] However, existing gas alarms have the following shortcomings: 1. Valve control often uses a single wired connection or one-way wireless communication, which cannot provide real-time feedback on valve status and poses a risk of command execution failure; 2. The compatibility between the host and valves is limited, making it difficult to meet the differentiated control requirements of different types of valves (such as knife valves and air valves); 3. The multi-device linkage capability is insufficient, which cannot meet the centralized management needs of multi-area and multi-valve scenarios. Utility Model Content

[0004] Therefore, in response to the above problems, this utility model proposes a new type of gas alarm, which realizes the integrated functions of gas leak detection, multi-valve linkage control and remote status monitoring through two-way wireless communication, multi-type valve adaptation and 4G remote transmission technology.

[0005] To solve this technical problem, the present invention adopts the following solution: A novel gas alarm includes a gas alarm host, a gas sensor, and an electromagnetic valve controller. The gas alarm host includes a first central processing unit (CPU), a first 433MHz radio frequency module, a 4G network transmission module, a smartphone, a cloud server, and an alarm. The electromagnetic valve controller includes a second CPU, a second 433MHz radio frequency module, and an electromagnetic valve. The gas sensor is located at the gas leak location to be detected, collects gas concentration information in real time, and sends it to the first CPU. The electromagnetic valve is located on the gas supply pipeline to either stop or open the gas supply. After receiving the gas sensor detection information, the first CPU compares it with a gas concentration threshold stored in its internal memory. If the gas concentration exceeds the threshold, the first CPU communicates with the second 433MHz radio frequency module of the electromagnetic valve controller via the first 433MHz radio frequency module and sends a control command to the second CPU. The second CPU, based on the received control command, controls the electromagnetic valve on the gas supply pipeline corresponding to the gas leak location to either close or open the gas supply. The second CPU also transmits the electromagnetic valve's execution status via the second 433MHz radio frequency module to the first 433MHz radio frequency module of the gas alarm host. The radio frequency module communicates and sends data to the first central processing unit. The first central processing unit also controls the alarm to sound when the gas concentration exceeds the set threshold or when the solenoid valve malfunctions. The first central processing unit also uploads the alarm information to the cloud server via the 4G network transmission module. The cloud server then sends the alarm information to a smartphone for remote alarm.

[0006] A further improvement is that the first central processing unit is a BA45F6753 chip and its peripheral circuitry.

[0007] In a further improvement, the second central processing unit is an HC32L110C6PA chip and its peripheral circuitry.

[0008] A further improvement is that the alarm includes a buzzer and an indicator light display circuit.

[0009] Further improvements include a second alarm, which is connected to and controlled by a second central processing unit, and includes a second indicator light display circuit.

[0010] In a further improvement, the solenoid valve is an electric knife valve or a gas emergency shut-off valve.

[0011] By adopting the aforementioned technical solution, the beneficial effects of this utility model are as follows: By setting up a gas alarm host unit in conjunction with an electromagnetic valve controller and a gas sensor for detection, the gas alarm host unit includes a first central processing unit, a first 433MHz radio frequency module, a 4G network transmission module, a smartphone, a cloud server, and an alarm. The electromagnetic valve controller includes a second central processing unit, a second 433MHz radio frequency module, and a solenoid valve. The gas alarm host unit uses the first 433MHz radio frequency module and the second 433MHz radio frequency module of the electromagnetic valve controller for bidirectional 433MHz communication. Wireless communication enables command interaction and execution status feedback for solenoid valves on gas supply pipelines. Alarm information is uploaded to a cloud server via a 4G network transmission module. When a gas sensor detects that the gas leak concentration exceeds the standard, the gas alarm host triggers the alarm to issue a local audible and visual alarm and sends a valve-closing command to the solenoid valve controller. Simultaneously, it receives the solenoid valve execution result from the solenoid valve controller and synchronizes it to the cloud server. The solenoid valve controller enables universal application between different solenoid valves, achieving adaptability to various solenoid valves. This allows for mixed control of multiple sets of electric knife valves and gas emergency shut-off valves. The solenoid valve controller, in conjunction with other applications, enables differentiated control through type identification to adapt to the control needs of various solenoid valves in multiple scenarios. This solves the problems of single valve control and lack of status feedback in existing technologies. It features strong adaptability, high reliability, and low cost, realizing integrated functions of gas leak monitoring, multi-valve linkage control, and remote status monitoring, and can be widely promoted and applied. Attached Figure Description

[0012] Figure 1 This is a circuit block diagram of an embodiment of the present utility model; Figure 2 This is a partial circuit diagram of the gas alarm host according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the gas sensor circuit according to an embodiment of the present invention; Figure 4 This is a circuit diagram of the 4G network transmission module in this embodiment of the utility model; Figure 5 This is a partial circuit diagram of the electromagnetic valve controller in an embodiment of this utility model. Detailed Implementation

[0013] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0014] refer to Figures 1-5The preferred gas alarm of this utility model includes a gas alarm host 1, a gas sensor 2, and an electromagnetic valve controller 3. The gas alarm host 1 includes a first central processing unit 11, a first 433MHz radio frequency module 12, a 4G network transmission module 13, a smartphone 14, a cloud server 15, and an alarm 16. The first central processing unit 11 is a BA45F6753 chip and its peripheral circuits. The electromagnetic valve controller 3 includes a second central processing unit 31, a second 433MHz radio frequency module 32, a solenoid valve 33, and a second alarm 34. The second central processing unit 31 is an HC32L110C6PA chip. The gas sensor 2 is located at the gas leak location to be detected and collects gas concentration information in real time, which is then sent to the first central processing unit 11. The solenoid valve 33 is located on the gas supply pipeline to either stop or open the gas supply, and this gas supply pipeline is the gas supply pipeline corresponding to the gas sensor 2 detection location. The first central processing unit 11 has an internal memory that stores a gas concentration threshold. After receiving the gas sensor 2 detection information, the first central processing unit 11 compares it with the gas concentration threshold stored in its internal memory. If the gas concentration exceeds the set threshold, the first central processing unit 11 communicates with the second 433MHz radio frequency module 32 of the solenoid valve controller 3 via the first 433MHz radio frequency module 12 and sends a control command to the second central processing unit 31. The second central processing unit 31 controls the solenoid valve 33 on the gas supply pipeline corresponding to the gas leak location to close and stop the gas supply, or to open the gas supply after the alarm processing or maintenance is completed. The second central processing unit 31 also communicates the execution status of the solenoid valve 33 (such as valve closed, valve fault, etc.) with the first 433MHz radio frequency module 32 of the gas alarm host 1 via the second 433MHz radio frequency module 32. The radio frequency module 12 communicates and sends data to the first central processing unit 11. The second alarm 34 is connected to and controlled by the second central processing unit 31. The second alarm 34 includes a second indicator light display circuit. When the solenoid valve 33 encounters a valve malfunction, the second central processing unit 31 controls the second alarm 34 to perform a local audible and visual alarm. When the gas concentration exceeds a set threshold or the solenoid valve malfunctions, the first central processing unit 11 also controls the alarm 16 to sound an alarm. The alarm 16 includes a buzzer and an indicator light display circuit. The first central processing unit 11 also uploads alarm information to the cloud server 15 via the 4G network transmission module 13. The cloud server 15 sends the alarm information to the APP terminal of the smartphone 14 for remote alarm.

[0015] refer to Figure 3After the sensor is powered and heated to the operating temperature, methane gas is adsorbed on the surface of the sensor MQ4. The thickness of the adsorption layer of the sensor MQ4 changes with the concentration of methane gas. The methane gas reacts with the sensor MQ4 element to generate an electrical signal, which is amplified and filtered and then converted into a voltage signal and sent to the first central processing unit 11. The first central processing unit 11 reads the voltage signal sent by the gas sensor 2 and converts it into a methane concentration value. When the concentration exceeds the preset threshold (default 1% LEL), the alarm logic is triggered.

[0016] Working principle: The gas sensor 2 is placed at the gas leak location to collect gas concentration information in real time. A solenoid valve 33 is installed on the gas supply pipeline to either stop or open the gas supply. After the gas sensor 2 is heated to its operating temperature, methane gas is adsorbed onto its surface. The thickness of the adsorption layer on the gas sensor 2 varies with the concentration. The gas reacts with the gas sensor 2 element to generate an electrical signal, which is amplified and filtered internally by the gas sensor 2 and converted into a voltage signal, which is then sent to the first central processing unit 11. The first central processing unit 11 reads the voltage signal and converts it into a methane concentration value. When the concentration exceeds a preset threshold (default 1% LEL) in the internal memory of the first central processing unit 11, an alarm logic is triggered. When the gas sensor 2 detects a gas concentration exceeding the set threshold, the first central processing unit 11, via a 433MHz... The radio frequency module 12 communicates with the second 433MHz radio frequency module 32 of the solenoid valve controller 3 to send a control command to close the solenoid valve to the second central processing unit 31. The second central processing unit 31 controls the solenoid valve 33 on the gas supply pipeline corresponding to the gas leak to close and stop the gas supply, and controls the second alarm 34 to sound an alarm. After the alarm is handled or the maintenance is completed, the solenoid valve 33 is opened to control the gas supply pipeline to restore the gas supply. At the same time, the second central processing unit 31 also sends the execution status of the solenoid valve 33 (such as the solenoid valve being closed or the solenoid valve being in a fault state) to the first central processing unit 11 via the second 433MHz radio frequency module 32 and the first 433MHz radio frequency module 12 of the gas alarm host 1. Meanwhile, when the gas concentration exceeds the set threshold or the solenoid valve 33 fails, the first central processing unit 11 controls the alarm 16 to sound a local alarm and uploads the alarm information to the cloud server 15 via the 4G network transmission module 13 to forward the alarm to the smartphone 14 for remote alarm.

[0017] In the above embodiments, the solenoid valve can be an electric knife valve or a gas emergency shut-off valve. The first central processing unit and the second central processing unit are both components that can be directly purchased on the existing market. The judgment threshold comparison output is based on the functional application of the existing central processing unit.

[0018] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A novel gas alarm, comprising a gas alarm main unit, a gas sensor, and a solenoid valve controller, characterized in that: The gas alarm host includes a first central processing unit (CPU), a first 433MHz radio frequency module, a 4G network transmission module, a smartphone, a cloud server, and an alarm. The solenoid valve controller includes a second CPU, a second 433MHz radio frequency module, and a solenoid valve. The gas sensor is installed at the gas leak location to be detected, collecting gas concentration information in real time and sending it to the first CPU. The solenoid valve is installed on the gas supply pipeline to either stop or open the gas supply. After receiving the gas sensor detection information, the first CPU compares it with a gas concentration threshold stored in its internal memory. If the gas concentration exceeds the threshold, the first CPU communicates with the second 433MHz radio frequency module of the solenoid valve controller via the first 433MHz radio frequency module and sends a control command to the second CPU. The second CPU, based on the received control command, controls the solenoid valve on the gas supply pipeline corresponding to the gas leak location to either close or open the gas supply. The second CPU also transmits the solenoid valve's execution status via the second 433MHz radio frequency module to the first 433MHz radio frequency module of the gas alarm host. The radio frequency module communicates and sends data to the first central processing unit. The first central processing unit also controls the alarm to sound when the gas concentration exceeds the set threshold or when the solenoid valve malfunctions. The first central processing unit also uploads the alarm information to the cloud server via the 4G network transmission module. The cloud server then sends the alarm information to a smartphone for remote alarm.

2. The novel gas alarm according to claim 1, characterized in that: The first central processing unit is a BA45F6753 chip and its peripheral circuits.

3. The novel gas alarm according to claim 1, characterized in that: The second central processing unit is an HC32L110C6PA chip and its peripheral circuits.

4. The novel gas alarm according to claim 1, characterized in that: The alarm includes a buzzer and an indicator light display circuit.

5. The novel gas alarm according to claim 1, characterized in that: It also includes a second alarm, which is connected to and controlled by a second central processing unit, and the second alarm includes a second indicator light display circuit.

6. The novel gas alarm according to claim 1, characterized in that: The solenoid valve is either an electric knife valve or a gas emergency shut-off valve.

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