Combustible gas point valve device with risk early warning and linkage control functions

Abstract

The invention discloses a combustible gas point valve device with risk early warning and linkage control functions, relates to the field of monitoring, and aims to solve the problem that when a gas leakage accident occurs in a traditional gas point valve box, accident information cannot be transmitted to workers in time, and the accident occurrence risk is increased. The combustible gas detection device is used for detecting whether the concentration and the temperature of the combustible gas in the valve box simultaneously reach respective dangerous values or not in real time; if yes, alarm information is sent to the alarm device on the point valve box, the alarm devices on the point valve boxes within the preset range and the monitoring center at the same time, and an air inlet valve in the point valve boxes is controlled to be closed; and if not, whether the concentration and the temperature of the combustible gas in the detection point valve box reach respective early warning values at the same time is judged, if yes, alarm information is sent to an alarm device on the detection point valve box, a ventilation device is controlled to operate at the same time, and if not, it is judged that no combustible gas leakage occurs in the detection point valve box. The method is used for monitoring whether combustible gas leakage occurs in the valve box or not.

Description

Technical Field

[0001] The invention relates to the field of monitoring, and belongs to the monitoring of a point valve box. Background Art

[0002] Existing valve box technology mainly focuses on functional applications, including flow control, pressure monitoring, etc. However, as a terminal equipment for the use of combustible gas, the combustible gas valve box lacks real-time leak monitoring, automatic ventilation system and remote data transmission functions, and cannot meet the needs of modern intelligent management, limiting the ability to control in emergency situations. When a gas leak occurs in a traditional gas valve box, the accident information cannot be transmitted to the staff in a timely manner, which leads to slow response and handling measures by relevant personnel, increasing the risk of accidents. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that when a gas leakage accident occurs in a traditional gas point valve box, the accident information cannot be transmitted to the staff in time, which increases the risk of accidents. A combustible gas point valve device with risk warning and linkage control functions is proposed.

[0004] A combustible gas valve point device with risk warning and linkage control functions, the combustible gas valve point device comprising a valve point box, a combustible gas detection device, an alarm device and a ventilation device;

[0005] The air inlet end of the valve box is connected to the combustible gas source end, and the air outlet end of the valve box is connected to the gas-using equipment end; the combustible gas detection device is embedded on the side wall of the valve box, the alarm device is embedded on the combustible gas detection device, and the ventilation device is arranged on the top of the valve box;

[0006] The combustible gas detection device is used to detect in real time whether the concentration and temperature of the combustible gas in the valve box have reached their respective dangerous values ​​at the same time;

[0007] If yes, an alarm message is sent to the alarm device on the point valve box, the alarm devices on the point valve boxes within the preset range and the monitoring center at the same time, and the air inlet valve in the control point valve box is closed;

[0008] If not, determine whether the concentration and temperature of the combustible gas in the valve box at the detection point reach their respective warning values ​​at the same time. If so, send an alarm message to the alarm device on the valve box at this point and control the operation of the ventilation device at the same time. If not, determine that no combustible gas leakage occurs in the valve box at the detection point.

[0009] Preferably, the valve point box includes an air inlet valve, an air inlet pipe, a backfire arrester, a dust screen, a rectangular box, a pressure gauge, a bus bar, a branch pipeline, a branch pipeline ball valve, a branch pipeline flame arrester and a hose;

[0010] An air intake pipe extends from the top of the rectangular box, an air intake end of the air intake pipe is connected to the combustible gas source end, an air outlet end of the air intake pipe is connected to the bus inlet, an air intake valve is arranged on the air intake pipe near the air intake end of the air intake pipe, and a backfire arrester is arranged on the air intake pipe near the air intake end of the air intake pipe;

[0011] The pressure gauge is installed on the bus, the dust screen is located on the top of the rectangular box, one end of the branch pipe is connected to the bus outlet, the other end of the branch pipe is connected to one end of the branch pipe ball valve, the other end of the branch pipe ball valve is connected to one end of the branch pipe flame arrester, the other end of the branch pipe flame arrester is connected to one end of the hose, and the other end of the hose is connected to the gas-using equipment end.

[0012] Preferably, the air intake valve is implemented by an air intake electric ball valve.

[0013] Preferably, the combustible gas detection device comprises a control panel housing, an embedded processor, a temperature sensor, a concentration sensor, a storage module and a communication module;

[0014] The control panel housing is arranged on the side wall of the point valve box; the temperature sensor and the concentration sensor are both embedded in the back of the control panel housing, and the temperature sensor and the concentration sensor are embedded in the point valve box, and the embedded processor, the storage module and the communication module are all arranged in the control panel housing;

[0015] The temperature sensor is used to detect the temperature of the combustible gas in the point valve box and transmit it to the processing module and the storage module at the same time;

[0016] The concentration sensor is used to detect the concentration of combustible gas in the point valve box and transmit it to the processing module and the storage module at the same time;

[0017] A storage module, used to store the temperature and concentration of combustible gas in real time;

[0018] Embedded processor, used to detect in real time whether the concentration and temperature of combustible gas in the valve box reach their respective dangerous values ​​at the same time;

[0019] If yes, then send alarm information to the alarm device on this point valve box, to the alarm devices on the point valve boxes within the preset range and to the monitoring center through the communication module, and control the air inlet valve in the point valve box to close;

[0020] If not, determine whether the concentration and temperature of the combustible gas in the valve box at the detection point reach their respective warning values ​​at the same time. If so, send an alarm message to the alarm device on the valve box at this point and control the operation of the ventilation device at the same time. If not, determine that there is no combustible gas leakage in the valve box at the detection point.

[0021] Preferably, the combustible gas detection device further includes a start button, a reset button and a USB interface;

[0022] The start button, reset button and USB interface are all on the front surface of the panel housing;

[0023] A start button is used to start the processing module to work;

[0024] The reset button is used to reset the embedded processor to the detection state after the combustible gas leakage fault is eliminated;

[0025] USB interface, used to export the temperature and concentration data stored in the storage module.

[0026] Preferably, the combustible gas detection device further comprises a filtering device;

[0027] A filter device is installed on the concentration sensor probe.

[0028] Preferably, the alarm device includes a buzzer and an alarm light;

[0029] The alarm light is located above the control panel housing, and the buzzer is located inside the control panel housing;

[0030] The embedded processor drives the buzzer to sound at a preset high frequency and the alarm light to light up in red when it detects that the concentration and temperature of the combustible gas in the point valve box reach their respective dangerous values ​​at the same time; when it detects that the concentration and temperature of the combustible gas in the point valve box reach their respective warning values ​​at the same time, it drives the buzzer to sound at a preset low volume and the alarm light to light up in yellow.

[0031] Preferably, the ventilation device includes a fan; the combustible gas detection device also includes a display screen and operation buttons;

[0032] The fan is set on the top of the point valve box;

[0033] An operation button is used to send a button signal to the running fan;

[0034] The embedded processor is also used to control the fan to run at a preset speed when it is detected that the concentration and temperature of the combustible gas in the point valve box reach their respective warning values ​​at the same time. It is also used to adjust the preset speed of the current fan after receiving a key signal, and send the preset speed or the adjusted speed to the display screen for display.

[0035] The beneficial effects of the present invention are:

[0036] Compared with the traditional point valve box design, the present invention has built-in concentration and temperature sensors, which can monitor the gas concentration and temperature in the point valve box in real time. When the risk of leakage is detected, it will promptly alarm itself and simultaneously send an alarm to the monitoring center and the surrounding combustible gas point valve devices. It can issue an early warning in the early stage of the accident and take appropriate control measures to prevent the accident from expanding.

[0037] The present invention has multi-level alarm and automatic linkage functions, which can automatically adjust the fan speed, close the valve, and trigger the alarm linkage of the adjacent valve box according to the degree of gas leakage, thereby reducing risks in time and quickly notifying staff, thereby improving accident response efficiency.

[0038] The present invention supports data uploading and local storage functions, can be connected to a centralized control unit to achieve remote monitoring, data statistics and historical analysis, and is helpful for risk management and security optimization.

[0039] The invention is applicable to pipeline use points of combustible gases such as coal gas, natural gas, acetylene, etc., and has excellent risk control function. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is the overall structure diagram of the combustible gas valve device with risk warning and linkage control functions;

[0041] Figure 2 This is a structural diagram of a combustible gas detection device;

[0042] Figure 3 It is a schematic diagram of the principle of a combustible gas valve point device with risk warning and linkage control functions;

[0043] Figure 4 Displaying a content image for a display screen;

[0044] Figure 5 This is a control flow chart for a combustible gas valve point device with risk warning and linkage control functions. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0047] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0048] Example:

[0049] Combination Figures 1 to 3 , describing this embodiment, a combustible gas valve point device with risk warning and linkage control functions, the combustible gas valve point device comprising a valve point box 1, a combustible gas detection device 2, an alarm device 3 and a ventilation device 4;

[0050] The air inlet end of the valve box 1 is connected to the combustible gas source end, and the air outlet end of the valve box 1 is connected to the gas-using equipment end; the combustible gas detection device 2 is embedded on the side wall of the valve box 1, the alarm device 3 is embedded on the combustible gas detection device 2, and the ventilation device 4 is arranged on the top of the valve box 1;

[0051] The combustible gas detection device 2 is used to detect in real time whether the concentration and temperature of the combustible gas in the point valve box 1 have reached their respective dangerous values ​​at the same time;

[0052] If yes, then send alarm information to the alarm device 3 on this point valve box 1, the alarm device 3 on the point valve box 1 within the preset range and the monitoring center at the same time, and control the air intake valve 1-1 in the point valve box 1 to close;

[0053] If not, determine whether the concentration and temperature of the combustible gas in the detection point valve box 1 reach their respective warning values ​​at the same time. If so, send an alarm message to the alarm device 3 on this point valve box 1, and control the operation of the ventilation device 4 at the same time. If not, determine that no combustible gas leakage occurs in the point valve box 1.

[0054] Specifically, when the combustible gas leakage value is monitored to be between 1-5000ppm or the temperature inside the valve box reaches 40℃, the yellow alarm light flashes, the buzzer sounds an alarm, the frequency is set to 2-3kHz, the volume is set to 70-85dB, the fan starts, and the combustible gas is extracted. The fan speed must reach 1750RPM; during use, when the leakage threshold is greater than 5000ppm, the light turns red, the buzzer alarm value increases, the frequency is set to 4kHz, the volume is set to 85-95dB, the fan accelerates ventilation and exhaust, and the fan speed must reach 3580RPM. Wireless communication The module transmits the alarm signal to the monitoring center and the adjacent valve box. After the adjacent valve box receives the linkage signal, it will start its own safety protection behavior, the yellow alarm light flashes, the buzzer alarms, the frequency is set to 2-3kHz, the volume is set to 70-85dB, the fan is started, and the combustible gas is extracted. The fan speed must reach 1750RPM; when the light is green, this state indicates that the equipment is operating normally; when the light is blue, this state indicates that the equipment is abnormal, and the abnormal information can be displayed on the control panel display to remind the inspection and maintenance of the equipment to ensure the normal operation of the monitoring. The above alarm information is transmitted to the monitoring center through the wireless transmission module.

[0055] When the mass of combustible gas is greater than that of air, the fan is arranged outside the lower side of the valve box, and the partition between the valve box and the fan is provided with multiple circular holes to increase the gas discharge effect. The concentration sensor is arranged on the lower side of the valve box to better monitor gas leakage.

[0056] Further introduction to the structure of the valve box 1:

[0057] The valve box 1 includes an air inlet valve 1-1, an air inlet pipe 1-2, a backfire arrester 1-3, a dust screen 1-4, a rectangular box 1-5, a pressure gauge 1-7, a bus bar 1-8, a branch pipeline 1-9, a branch pipeline ball valve 1-10, a branch pipeline flame arrester 1-6 and a hose;

[0058] An air intake pipe 1-2 extends from the top of the rectangular box 1-5, an air intake end of the air intake pipe 1-2 is connected to the combustible gas source end, an air outlet end of the air intake pipe 1-2 is connected to the inlet of the bus 1-8, an air intake valve 1-1 is arranged on the air intake pipe 1-2 near the air intake end of the air intake pipe 1-2, and a backfire arrester 1-3 is arranged on the air intake pipe 1-2 near the air intake end of the air intake pipe 1-2;

[0059] The pressure gauge 1-7 is installed on the bus 1-8, the dust screen 1-4 is located on the top of the rectangular box 1-5, one end of the branch pipeline 1-9 is connected to the outlet of the bus 1-8, the other end of the branch pipeline 1-9 is connected to one end of the branch pipeline ball valve 1-10, the other end of the branch pipeline ball valve 1-10 is connected to one end of the branch pipeline flame arrester 1-6, the other end of the branch pipeline flame arrester 1-6 is connected to one end of the hose, and the other end of the hose is connected to the gas-using equipment end.

[0060] Specifically, the rectangular boxes 1-5 are made of stainless steel with a wall thickness set between 2mm and 5mm. The box size is determined according to the type of combustible gas and the number of branch pipelines. Taking the outer diameter of the air intake pipe as 32mm and a three-branch pipeline point valve box as an example, the box size is 400mm x 300mm x 450mm in length, width and height.

[0061] The flashback arrester adopts a dry type flashback arrester, and its structure has multiple layers of metal mesh filter elements inside. The diameter of the metal mesh filter element is selected according to MESG (maximum experimental safety gap), and the material is selected from stainless steel or copper-nickel alloy to ensure the fire-blocking effect.

[0062] The type of intake valve 1 - 1 is further given: the intake valve 1 - 1 is implemented by an intake electric ball valve.

[0063] Specifically, the valve body, valve plate and valve stem of the air inlet electric ball valve are all made of stainless steel. According to the specifications of the air inlet pipe, the nominal diameter setting range is DN08-DN100. Taking the pipe outer diameter of 32mm as an example, an electric ball valve with a nominal diameter of DN25 should be selected, and the actuator of the electric valve should be selected with an on-site / remote control switch.

[0064] Given the composition of a combustible gas detection device 2:

[0065] The combustible gas detection device 2 includes a control panel housing 2-1, an embedded processor 2-2, a temperature sensor 2-3, a concentration sensor 2-4, a storage module and a communication module;

[0066] The control panel housing 2-1 is arranged on the side wall of the point valve box 1; the temperature sensor 2-3 and the concentration sensor 2-4 are both embedded in the back of the control panel housing 2-1, and the temperature sensor 2-3 and the concentration sensor 2-4 are embedded in the point valve box 1, and the embedded processor 2-2, the storage module and the communication module are all arranged in the control panel housing 2-1;

[0067] The temperature sensor 2-3 is used to detect the temperature of the combustible gas in the valve box 1 and transmit it to the processing module and the storage module;

[0068] Concentration sensor 2-4, used to detect the concentration of combustible gas in the point valve box 1, and transmit it to the processing module and the storage module at the same time;

[0069] A storage module, used to store the temperature and concentration of combustible gas in real time;

[0070] The embedded processor 2-2 is used to detect in real time whether the concentration and temperature of the combustible gas in the valve box 1 have reached their respective dangerous values ​​at the same time;

[0071] If yes, then send alarm information to the alarm device 3 on the point valve box 1, the alarm device 3 on the point valve box 1 within the preset range and the monitoring center through the communication module, and control the air inlet valve in the point valve box 1 to close;

[0072] If not, determine whether the concentration and temperature of the combustible gas in the detection point valve box 1 reach their respective warning values ​​at the same time. If so, send an alarm message to the alarm device 3 on this point valve box 1, and control the operation of the ventilation device 4 at the same time. If not, determine that there is no combustible gas leakage in the point valve box 1.

[0073] Specifically, the monitoring data and alarm events are uploaded to the monitoring center in real time and stored in the local storage module at the same time. In addition, the system periodically transmits status information to the monitoring center in a non-alarm state to ensure data continuity.

[0074] The composition of the combustible gas detection device 2 is further defined as: it also includes a start button 2-5, a reset button 2-6 and a USB interface 2-7;

[0075] The start button 2-5, the reset button 2-6 and the USB interface 2-7 are all on the front surface of the panel housing 2-1;

[0076] Start button 2-5 is used to power on and start the post-processing module;

[0077] The reset button 2-6 is used to reset the embedded processor 2-2 to the detection state after the combustible gas leakage fault is eliminated;

[0078] USB interface 2-7 is used to export the temperature and concentration data stored in the storage module.

[0079] The composition of the combustible gas detection device 2 is further defined as: it also includes a filtering device 2-8;

[0080] A filter device 2-8 is installed on the probe of the concentration sensor 2-4.

[0081] The alarm device 3 is further defined as comprising: a buzzer 3-1 and an alarm light 3-2;

[0082] The alarm light 3-2 is located above the control panel housing 2-1, and the buzzer 3-1 is located inside the control panel housing 2-1;

[0083] When the embedded processor 2-2 detects that the concentration and temperature of the combustible gas in the point valve box 1 reach their respective dangerous values ​​at the same time, it drives the buzzer 3-1 to sound at a preset high frequency and drives the alarm light 3-2 to light up red; when it detects that the concentration and temperature of the combustible gas in the point valve box 1 reach their respective warning values ​​at the same time, it drives the buzzer 3-1 to sound at a preset low volume and drives the alarm light 3-2 to light up yellow.

[0084] The ventilation device 4 is further defined as comprising: a fan;

[0085] The combustible gas detection device 2 also includes a display screen 2-9 and operation buttons 2-10;

[0086] The fan is arranged on the top of the point valve box 1;

[0087] Operation buttons 2-10 are used to send key signals to the running fan;

[0088] The embedded processor 2-2 is also used to control the fan to run at a preset speed when it is detected that the concentration and temperature of the combustible gas in the point valve box 1 reach their respective warning values ​​at the same time. It is also used to adjust the preset speed of the current fan after receiving a key signal, and send the preset speed or the adjusted speed to the display screen 2-9 for display.

[0089] Specifically, the ventilation device includes a fan, which is located on the upper side of the rectangular box and below the dust screen. The fan adopts a flame retardant and explosion-proof design. Fans of different specifications are selected according to the size of the valve box. The fan is located on the upper side of the rectangular box and below the dust screen. The fan speed is adjustable in multiple gears. Different speeds are used according to the different combustible gas leakage situations. The fan speed can also be adjusted using the buttons on the control panel.

[0090] like Figure 4 As shown, the control panel display screen displays interface information including: date, combustible gas concentration, temperature, fan speed, device status and setting options.

[0091] The operating procedures for the combustible gas valve point device with risk warning and linkage control functions are as follows:

[0092] Step 1: After the system is powered on, the combustible gas point valve box starts the self-inspection process, including the monitoring of hardware such as sensors, communication modules, fans and alarm devices. When the equipment detects an abnormal situation during self-inspection or operation (such as sensor failure, communication module abnormality, fan failure or data transmission problem), the alarm light turns blue and the fault information is displayed on the control panel.

[0093] Step 2: After initialization is completed, the equipment is in normal condition, the alarm light turns green, and each sensor starts monitoring. The monitoring module will collect data such as gas concentration and temperature in the valve box in real time.

[0094] Step 3: The concentration sensor and temperature sensor continuously collect environmental data and upload it to the embedded processor. The system sets multi-level alarm thresholds, such as warning values ​​and danger values ​​for gas concentration and temperature.

[0095] Step 4: If the concentration and temperature of the combustible gas reach dangerous values, the alarm light will turn red, the buzzer will sound continuously at a high volume, the fan will be turned on to the preset level and an alarm signal will be sent to the monitoring center; the system will automatically link the surrounding valve boxes to issue a warning, prompting staff in the nearby area to evacuate, and trigger the emergency closure of the valves of the corresponding pipelines.

[0096] Step 5: If the concentration and temperature of the combustible gas do not reach the dangerous value, but the gas concentration and temperature reach the set warning value, the alarm light flashes yellow and the buzzer sounds at a low frequency to remind the staff that there may be a slight leak. The system also activates the ventilation device and turns the fan speed to the preset level to accelerate gas diffusion and reduce the leakage concentration.

[0097] Step 6. After the fault is resolved, the staff can reset the system through the control panel and the system will return to normal monitoring status. If the alarm signal is not released, the system will maintain the linkage alarm and fan operation until the concentration drops to a safe range.

[0098] When the alarm light is blue, it indicates that the internal hardware or software of the system is abnormal. When the device detects an abnormal situation during self-check or operation (such as sensor failure, communication module abnormality, fan failure or data transmission problem), the blue fault light will light up and the fault information will be displayed on the control panel for quick troubleshooting and maintenance. When the fault is repaired or the system is reset, the blue fault light will automatically go out, indicating that the system has returned to normal.

[0099] When the monitored gas concentration value is lower than the alarm threshold and all functions remain normal, the alarm light will display green, indicating that the equipment is operating normally and no further operation is required.

[0100] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A combustible gas valve point device with risk warning and linkage control functions, characterized in that: The combustible gas valve-pointing device comprises a valve-pointing box (1), a combustible gas detection device (2), an alarm device (3) and a ventilation device (4); The air inlet end of the valve point box (1) is connected to the combustible gas source end, and the air outlet end of the valve point box (1) is connected to the gas-using equipment end; the combustible gas detection device (2) is embedded in the side wall of the valve point box (1), the alarm device (3) is embedded in the combustible gas detection device (2), and the ventilation device (4) is arranged on the top of the valve point box (1); A combustible gas detection device (2) is used to detect in real time whether the concentration and temperature of the combustible gas in the point valve box (1) have reached their respective dangerous values ​​at the same time; If yes, an alarm message is simultaneously sent to the alarm device (3) on the point valve box (1), the alarm devices (3) on the point valve boxes (1) within a preset range, and the monitoring center, and the air inlet valve (1-1) in the point valve box (1) is controlled to be closed; If not, determine whether the concentration and temperature of the combustible gas in the detection point valve box (1) have reached their respective warning values ​​at the same time. If so, send an alarm message to the alarm device (3) on the point valve box (1) and control the operation of the ventilation device (4) at the same time. If not, determine that no combustible gas leakage has occurred in the point valve box (1).

2. The combustible gas valve point device with risk warning and linkage control functions according to claim 1 is characterized in that: The valve box (1) comprises an air intake valve (1-1), an air intake pipe (1-2), a backfire arrester (1-3), a dust screen (1-4), a rectangular box (1-5), a pressure gauge (1-7), a bus bar (1-8), a branch pipeline (1-9), a branch pipeline ball valve (1-10), a branch pipeline flame arrester (1-6) and a hose; An air intake pipe (1-2) extends from the top of the rectangular box (1-5); an air intake end of the air intake pipe (1-2) is connected to a combustible gas source end; an air outlet end of the air intake pipe (1-2) is connected to an inlet of a bus bar (1-8); an air intake valve (1-1) is arranged on the air intake pipe (1-2) near the air intake end of the air intake pipe (1-2); and a backfire arrester (1-3) is arranged on the air intake pipe (1-2) near the air intake end of the air intake pipe (1-2); The pressure gauge (1-7) is installed on the bus (1-8), the dust screen (1-4) is located on the top of the rectangular box (1-5), one end of the branch pipeline (1-9) is connected to the outlet of the bus (1-8), the other end of the branch pipeline (1-9) is connected to one end of the branch pipeline ball valve (1-10), the other end of the branch pipeline ball valve (1-10) is connected to one end of the branch pipeline flame arrester (1-6), the other end of the branch pipeline flame arrester (1-6) is connected to one end of the hose, and the other end of the hose is connected to the gas-using equipment end.

3. The combustible gas valve point device with risk warning and linkage control functions according to claim 2 is characterized in that: The air intake valve (1-1) is realized by an air intake electric ball valve.

4. The combustible gas valve point device with risk warning and linkage control functions according to claim 1 is characterized in that: The combustible gas detection device (2) comprises a control panel housing (2-1), an embedded processor (2-2), a temperature sensor (2-3), a concentration sensor (2-4), a storage module and a communication module; The control panel housing (2-1) is arranged on the side wall of the point valve box (1); the temperature sensor (2-3) and the concentration sensor (2-4) are both embedded in the back of the control panel housing (2-1), and the temperature sensor (2-3) and the concentration sensor (2-4) are embedded in the inside of the point valve box (1); the embedded processor (2-2), the storage module and the communication module are all arranged in the inside of the control panel housing (2-1); The temperature sensor (2-3) is used to detect the temperature of the combustible gas in the point valve box (1) and transmit it to the processing module and the storage module at the same time; Concentration sensors (2-4) are used to detect the concentration of combustible gas in the point valve box (1) and transmit it to the processing module and the storage module at the same time; A storage module, used to store the temperature and concentration of combustible gas in real time; An embedded processor (2-2) is used to detect in real time whether the concentration and temperature of the combustible gas in the point valve box (1) have reached their respective dangerous values ​​at the same time; If yes, an alarm message is simultaneously sent to the alarm device (3) on the point valve box (1), to the alarm devices (3) on the point valve boxes (1) within a preset range and to the monitoring center through the communication module, and the air inlet valve in the point valve box (1) is controlled to close; If not, determine whether the concentration and temperature of the combustible gas in the detection point valve box (1) have reached their respective warning values ​​at the same time. If so, send an alarm message to the alarm device (3) on the point valve box (1) and control the operation of the ventilation device (4). If not, determine that there is no combustible gas leakage in the point valve box (1).

5. The combustible gas valve point device with risk warning and linkage control functions according to claim 4 is characterized in that: The combustible gas detection device (2) also includes a start button (2-5), a reset button (2-6) and a USB interface (2-7); The start button (2-5), the reset button (2-6) and the USB interface (2-7) are all on the front surface of the control panel housing (2-1); A start button (2-5) is used to start the processing module. A reset button (2-6) is used to reset the embedded processor (2-2) to a detection state after the combustible gas leakage fault is resolved; The USB interface (2-7) is used to export the temperature and concentration data stored in the storage module.

6. The combustible gas valve point device with risk warning and linkage control functions according to claim 4 is characterized in that: The combustible gas detection device (2) further comprises a filtering device (2-8); A filter device (2-8) is installed on the probe of the concentration sensor (2-4).

7. The combustible gas valve point device with risk warning and linkage control functions according to claim 4 is characterized in that: The alarm device (3) comprises a buzzer (3-1) and an alarm light (3-2); The alarm light (3-2) is located above the control panel housing (2-1), and the buzzer (3-1) is located inside the control panel housing (2-1); The embedded processor (2-2) drives the buzzer (3-1) to sound at a preset high frequency and drives the alarm light (3-2) to light up in red when it detects that the concentration and temperature of the combustible gas in the point valve box (1) simultaneously reach their respective dangerous values; and drives the buzzer (3-1) to sound at a preset low volume and drives the alarm light (3-2) to light up in yellow when it detects that the concentration and temperature of the combustible gas in the point valve box (1) simultaneously reach their respective warning values.

8. The combustible gas valve point device with risk warning and linkage control functions according to claim 5 is characterized in that: The ventilation device (4) includes a fan; the combustible gas detection device (2) also includes a display screen (2-9) and operation buttons (2-10); The fan is arranged on the top of the point valve box (1); Operation buttons (2-10) are used to send button signals to the running fan; The embedded processor (2-2) is also used to control the fan to run at a preset speed when it is detected that the concentration and temperature of the combustible gas in the point valve box (1) reach their respective warning values ​​at the same time, and is also used to adjust the preset speed of the current fan after receiving a key signal, and send the preset speed or the adjusted speed to the display screen (2-9) for display.

Images