Low-pressure carbon dioxide fire extinguishing system pneumatic control plate with voice reminding function

Abstract

A low-pressure carbon dioxide fire extinguishing system pneumatic control board with a voice reminding function is characterized in that a voice reminding unit is fixedly arranged on a fire extinguishing system pneumatic control board box body and is electrically connected with a partition gas circuit main valve in the low-pressure carbon dioxide fire extinguishing system pneumatic control board and a limit switch of a manual three-way valve; detecting the on-off states of a partition gas circuit main valve and a manual three-way valve; when an operator changes the states of the partition gas circuit main valve and the manual three-way valve in the pneumatic control board of the low-pressure carbon dioxide fire extinguishing system, the voice reminding unit plays pre-recorded voice to remind the operator of changing the result generated by the states of the partition gas circuit main valve and the manual three-way valve. Therefore, accidental release of carbon dioxide gas caused by misoperation or huge economic loss caused by control failure of a pneumatic control plate of a low-pressure carbon dioxide fire extinguishing system is prevented.

Description

Technical Field

[0001] The utility model relates to a low-pressure carbon dioxide fire extinguishing system, in particular to a low-pressure carbon dioxide fire extinguishing system gas control panel with a voice reminder function. Background Art

[0002] In the rolling production process of non-ferrous metal strips and foils, process lubricants are needed to clean the surface dirt, cool the plate temperature, and control the surface waves of the strip. The lubricant is usually based on kerosene and has a small amount of additives. During the rolling process, the lubricant evaporates to produce a large amount of oil mist. A large concentration of oil mist can easily cause a fire in the case of mechanical overheating, static electricity accumulation, sparks from broken strips, and high strip temperatures. Therefore, the non-ferrous metal processing field is often equipped with a low-pressure carbon dioxide fire extinguishing system to control the occurrence of fires.

[0003] The low-pressure carbon dioxide fire extinguishing system is equipped with a gas control panel for manually or automatically controlling the release of the gas of the low-pressure carbon dioxide fire extinguishing system; in the gas control panel of the low-pressure carbon dioxide fire extinguishing system, a partition gas circuit main valve, an electric three-way valve, and a manual three-way valve are provided, wherein the partition gas circuit main valve and the manual three-way valve are both manual control valves; when the low-pressure carbon dioxide fire extinguishing system is in a normal standby state, the partition gas circuit main valve is in an on state, and the manual three-way valve is in a closed state; when the low-pressure carbon dioxide fire extinguishing system is under maintenance, the partition gas circuit main valve is in a closed state, and the valves at the rear end of the partition gas circuit main valve are inspected or the rear end pipeline is maintained. In this process, the manual three-way valve may not return to the closed state after the inspection operation. When the partition gas circuit main valve is opened in this state, the low-pressure carbon dioxide fire extinguishing system may malfunction, resulting in an accidental release of carbon dioxide gas. If there are workers on the production line at this time, the personal safety of the workers will be endangered. Therefore, the existing low-pressure carbon dioxide fire extinguishing system gas control panel has serious operational safety loopholes;

[0004] In addition, during the maintenance of the low-pressure carbon dioxide fire extinguishing system, if the main valve of the zoned gas circuit is closed due to misoperation, the gas control panel of the low-pressure carbon dioxide fire extinguishing system will fail to control. In this case, when a fire occurs, the carbon dioxide gas cannot be released, causing the fire to get out of control, thereby causing huge economic losses to the company. Utility Model Content

[0005] In order to overcome the deficiencies in the background technology, the utility model discloses a low-pressure carbon dioxide fire extinguishing system gas control board with a voice reminder function, a voice reminder unit is fixedly arranged on the fire extinguishing system gas control board box, the voice reminder unit is electrically connected to the limit switches of the partition gas circuit main valve and the manual three-way valve in the low-pressure carbon dioxide fire extinguishing system gas control board, and detects the switching status of the partition gas circuit main valve and the manual three-way valve; when the operator changes the status of the partition gas circuit main valve and the manual three-way valve in the low-pressure carbon dioxide fire extinguishing system gas control board, the voice reminder unit plays a pre-recorded voice to remind the operator of the result of changing the status of the partition gas circuit main valve and the manual three-way valve, thereby preventing the accidental release of carbon dioxide gas due to misoperation, or the huge economic losses caused by the control failure of the low-pressure carbon dioxide fire extinguishing system gas control board.

[0006] In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme: a low-pressure carbon dioxide fire extinguishing system gas control panel with a voice reminder function, including a plurality of gas control units and voice reminder units arranged in parallel, the gas control unit is fixedly arranged in the fire extinguishing system gas control panel box, the voice reminder unit is fixedly arranged on the fire extinguishing system gas control panel box, the gas control unit and the voice reminder unit are electrically connected; the gas control unit is connected to the gas source unit through a gas pipeline; the gas control unit is provided with a partition gas circuit main valve and a manual three-way valve, when the operator changes the state of the partition gas circuit main valve and the manual three-way valve in the low-pressure carbon dioxide fire extinguishing system gas control panel, the voice reminder unit plays a pre-recorded voice to remind the operator of the result of changing the state of the partition gas circuit main valve and the manual three-way valve.

[0007] Furthermore, the low-pressure carbon dioxide fire extinguishing system gas control panel also includes a door-controlled switch, which is fixed on the door frame; the door frame is hinged with a transparent glass door, and the door-controlled switch is electrically connected to the voice reminder unit; when the operator opens the glass door of the fire extinguishing system gas control panel box, the door-controlled switch is triggered, and the door-controlled switch sends a door opening signal to the voice reminder unit. At this time, the voice reminder unit plays a pre-recorded voice to remind the operator not to connect the partition gas circuit main valve and the manual three-way valve at the same time.

[0008] Furthermore, the gas control unit includes a partition gas circuit main valve, an electric three-way valve, a manual three-way valve, and a partition selection valve driving device; one end of the partition gas circuit main valve is connected to the gas source unit through a gas pipeline, and the other end is connected to the electric three-way valve and the manual three-way valve through gas pipelines, the electric three-way valve and the manual three-way valve are also connected through a gas pipeline, and the manual three-way valve is connected to the partition selection valve driving device through a gas pipeline; a main valve pneumatic valve limit switch is fixedly provided on the partition gas circuit main valve, and the main valve pneumatic valve limit switch is used to detect the switching state of the partition gas circuit main valve; a manual valve pneumatic valve limit switch is fixedly provided on the manual three-way valve, and the manual valve pneumatic valve limit switch is used to detect the switching state of the manual three-way valve.

[0009] Furthermore, the gas control board of the low-pressure carbon dioxide fire extinguishing system is also electrically connected to a control system. The control system is independently developed based on a single-chip microcomputer and has the advantage of low cost. The control system is used to automatically control the switch of the electric three-way valve.

[0010] Preferably, the low-pressure carbon dioxide fire extinguishing system gas control panel is also electrically connected to a PLC control unit, which is used to monitor the switching status of the glass door, the partition gas circuit main valve, and the manual three-way valve in real time, automatically control the switch of the electric three-way valve, or issue control instructions to control the voice reminder unit to play a voice reminder.

[0011] Furthermore, the voice reminder unit is electrically connected to the main valve pneumatic valve limit switch and the manual valve pneumatic valve limit switch; when the voice reminder unit is electrically connected to the main valve pneumatic valve limit switch and the manual valve pneumatic valve limit switch, the voice reminder unit can monitor the switching status of the partition gas circuit main valve, the manual three-way valve and the glass door in real time; when the operator opens the glass door of the fire extinguishing system air control panel box, the door control switch is triggered, and the door control switch sends a door opening signal to the voice reminder unit. At this time, the voice reminder unit plays a pre-recorded targeted voice according to the switching status of the partition gas circuit main valve and the manual three-way valve, reminding the operator not to connect the partition gas circuit main valve and the manual three-way valve at the same time.

[0012] Preferably, the voice reminder unit is electrically connected to the PLC control unit, the main valve pneumatic valve limit switch and the manual valve pneumatic valve limit switch; when the voice reminder unit is electrically connected to the PLC control unit, the main valve pneumatic valve limit switch and the manual valve pneumatic valve limit switch, the PLC control unit monitors the switching status of the partition gas circuit main valve, the manual three-way valve and the glass door in real time through the voice reminder unit; when the operator opens the glass door of the air control panel box of the fire extinguishing system, the door control switch is triggered, and the door control switch sends a door opening signal to the voice reminder unit, and the voice reminder unit transmits the door opening signal to the PLC control unit, and the PLC control unit returns a control signal to the voice reminder unit according to the monitored status of the partition gas circuit main valve and the manual three-way valve, and the voice reminder unit plays a pre-recorded targeted voice according to the control signal to remind the operator not to connect the partition gas circuit main valve and the manual three-way valve at the same time.

[0013] Preferably, the PLC control unit is electrically connected to the voice reminder unit, the main valve pneumatic valve limit switch and the manual valve pneumatic valve limit switch; when the PLC control unit is electrically connected to the voice reminder unit, the main valve pneumatic valve limit switch and the manual valve pneumatic valve limit switch, the switching status of the partition gas circuit main valve and the manual three-way valve are directly monitored, and the switching status of the glass door is detected through the voice reminder unit; when the operator opens the glass door of the air control panel box of the fire extinguishing system, the door control switch is triggered, and the door control switch sends a door opening signal to the voice reminder unit, and the voice reminder unit transmits the door opening signal to the PLC control unit, and the PLC control unit returns a control signal to the voice reminder unit according to the directly monitored status of the partition gas circuit main valve and the manual three-way valve, and the voice reminder unit plays a pre-recorded targeted voice according to the control signal to remind the operator not to connect the partition gas circuit main valve and the manual three-way valve at the same time.

[0014] Furthermore, identification plates are provided on the zoned gas circuit main valve and manual three-way valve. The identification plates are used to indicate the valve body name and the serial number of the gas control unit to which each zoned gas circuit main valve and manual three-way valve belongs. The identification plates are the same as the valve body name and the serial number of the gas control unit to which they belong in the reminder voice played by the voice reminder unit. The voice played reminds the operator to find the corresponding valve body for operation, thereby preventing the zoned gas circuit main valve and manual three-way valve from being connected at the same time.

[0015] Furthermore, a filter is provided on the gas pipeline between the partition gas circuit main valve and the electric three-way valve; a quick exhaust valve is provided on the gas pipeline connecting the manual three-way valve and the partition selection valve drive device, and the quick exhaust valve is used to discharge the gas when the partition selection valve drive device returns to its position.

[0016] Due to the adoption of the technical scheme as described above, the utility model has the following beneficial effects: the utility model discloses a low-pressure carbon dioxide fire extinguishing system gas control board with a voice reminder function, in which a voice reminder unit is fixedly arranged on the fire extinguishing system gas control board box, and the voice reminder unit is electrically connected to the limit switches of the partition gas circuit main valve and the manual three-way valve in the low-pressure carbon dioxide fire extinguishing system gas control board to detect the switching status of the partition gas circuit main valve and the manual three-way valve; when the operator changes the status of the partition gas circuit main valve and the manual three-way valve in the low-pressure carbon dioxide fire extinguishing system gas control board, the voice reminder unit plays a pre-recorded voice to remind the operator of the result of changing the status of the partition gas circuit main valve and the manual three-way valve, thereby preventing the accidental release of carbon dioxide gas due to misoperation, or the huge economic losses caused by the control failure of the low-pressure carbon dioxide fire extinguishing system gas control board. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the gas control panel of the low-pressure carbon dioxide fire extinguishing system of Example 1;

[0018] Figure 2 This is a schematic diagram of the structure of the gas control panel of the low-pressure carbon dioxide fire extinguishing system of Example 2;

[0019] Figure 3 This is a schematic diagram of the structure of the gas control panel of the low-pressure carbon dioxide fire extinguishing system of Example 3;

[0020] Figure 4 This is a schematic diagram of the structure of the gas control panel of the low-pressure carbon dioxide fire extinguishing system of Example 4;

[0021] Figure 5 It is a schematic diagram of the structure of the gas control unit;

[0022] Figure 6 This is a schematic diagram of the structure of the voice reminder unit;

[0023] Figure 7 Schematic diagram of the gas source unit structure.

[0024] In the figure: 1. Air control unit; 1.1. Partition air circuit main valve; 1.1.1. Main valve pneumatic valve limit switch; 1.2. Electric three-way valve; 1.3. Manual three-way valve; 1.3.1. Manual valve pneumatic valve limit switch; 1.4. Partition selection valve drive device; 1.5. Quick exhaust valve; 1.6. Filter; 2. Voice reminder unit; 2.1. Voice controller; 2.2. Speaker; 3. PLC control unit; 4. Air source unit; 4.1. Carbon dioxide storage tank; 4.2. Air control board air source main valve; 4.3. Air control board air source valve; 5. Gate switch; 6. Control system. DETAILED DESCRIPTION

[0025] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. Embodiment 1:

[0026] A low-pressure carbon dioxide fire extinguishing system gas control panel with voice reminder function, see the attached manual Figure 1 : It includes four gas control units 1 and voice reminder units 2 arranged in parallel, the gas control unit 1 is fixedly arranged in the gas control panel box of the fire extinguishing system, and the voice reminder unit 2 is fixedly arranged on the upper part of the gas control panel box of the fire extinguishing system;

[0027] The structures of the four gas control units 1 are the same. Figure 5:It includes a partition gas circuit main valve 1.1, an electric three-way valve 1.2, a manual three-way valve 1.3, and a partition selection valve driving device 1.4, wherein the electric three-way valve 1.2 is electrically connected to a control system 6; one end of the partition gas circuit main valve 1.1 is connected to the gas source unit 4 through a gas pipeline, and the other end is connected to the electric three-way valve 1.2 and the manual three-way valve 1.3 through gas pipelines, respectively, the electric three-way valve 1.2 and the manual three-way valve 1.3 are also connected through a gas pipeline, and the manual three-way valve 1.3 is connected to the partition selection valve driving device 1.4 through a gas pipeline; a filter 1.6 is arranged on the gas pipeline between the partition gas circuit main valve 1.1 and the electric three-way valve 1.2; the manual three-way valve 1.3 and the partition selection valve driving device 1.4 A quick exhaust valve 1.5 is provided on the connected gas pipeline; the electric three-way valve 1.2 is electrically connected to a control system 6; a main valve pneumatic valve limit switch 1.1.1 is fixedly provided on the partition gas circuit main valve 1.1, which is used to detect the switch state of the partition gas circuit main valve 1.1; a manual valve pneumatic valve limit switch 1.3.1 is fixedly provided on the manual three-way valve 1.3, which is used to detect the switch state of the manual three-way valve 1.3; wherein the voice reminder unit 2 includes a voice controller 2.1 and a speaker 2.2, and the voice controller 2.1 adopts a YX092A-20LR voice module; the voice controller 2.1 is electrically connected to the speaker 2.2, the main valve pneumatic valve limit switch 1.1.1, and the manual valve pneumatic valve limit switch 1.3.1;

[0028] See the instruction manual Figure 7 : The gas source unit 4 includes a carbon dioxide storage tank 4.1, a gas control board gas source main valve 4.2, and a gas control board gas source valve 4.3 connected in series. The gas control board gas source valve 4.3 is connected to the partition gas circuit main valve 1.1 through a gas pipeline. The gas source unit 4 provides a driving gas source for the low-pressure carbon dioxide fire extinguishing system gas control board;

[0029] When the gas control panel of the low-pressure carbon dioxide fire extinguishing system with voice reminder function is in normal standby state, the partition gas circuit main valve 1.1 is in the on state, the electric three-way valve 1.2 is in the off state, and the manual three-way valve 1.3 is in the off state (at this time, the electric three-way valve 1.2 and the partition selection valve drive device 1.4 are in the connected state through the manual three-way valve 1.3, and the partition gas circuit main valve 1.1 and the partition selection valve drive device 1.4 are in the closed state through the manual three-way valve 1.3), and the electric three-way valve 1.2 is automatically controlled by the control system 6; if a fire occurs in the fire extinguishing control area 1, the control system 6 controls the electric three-way valve 1.2 in the gas control unit 1 to be connected, and the driving gas source from the gas source unit 4 enters the partition selection valve drive device 1.4 through the partition gas circuit main valve 1.1, the electric three-way valve 1.2, and the manual three-way valve 1.3, and the partition selection valve drive device 1.4 is activated, driving the corresponding selection valve of the gas control unit 1 to open, and the low-pressure carbon dioxide is released into the fire extinguishing control area 1 to extinguish the fire;

[0030] When the gas control panel of the low-pressure carbon dioxide fire extinguishing system is in normal standby state for normal maintenance, the operator opens the transparent glass door and manually operates the partition gas circuit main valve 1.1 or the manual three-way valve 1.3, the state of the partition gas circuit main valve 1.1 or the manual three-way valve 1.3 changes, and the voice controller 2.1 plays a pre-recorded voice according to the change of the state of the partition gas circuit main valve 1.1 or the manual three-way valve 1.3; for example, when the operator closes the gas circuit main valve 1.1 of the first zone, the voice controller 2.1 plays a pre-recorded voice through the speaker 2.2: "The gas circuit main valve of the first zone is closed, and the manual three-way valve of the first zone is allowed to be manually connected"; when the operator directly opens the manual three-way valve 1.3 without closing the partition gas circuit main valve 1.1, the voice controller 2.1 plays a pre-recorded voice through the speaker 2.2: "The carbon dioxide in the first zone has been released, please quickly close the manual three-way valve of the first zone". Embodiment 2:

[0031] See the instruction manual Figure 2: In this embodiment, a door-controlled switch 5 is also provided. The door-controlled switch 5 is a limit switch, which is fixedly arranged on the door frame. The door frame is hingedly connected with a transparent glass door. When the transparent glass door of the air-controlled panel box of the fire extinguishing system is opened or closed, the door-controlled switch 5 is triggered to act and the switch state of the transparent glass door is detected; the voice reminder unit 2 is electrically connected to the speaker 2.2, the main valve pneumatic valve limit switch 1.1.1, the manual valve pneumatic valve limit switch 1.3.1, and the door-controlled switch 5; the voice reminder unit 2 monitors the switch states of the partitioned gas circuit main valves 1.1, the manual three-way valve 1.3 and the glass door in the four gas control units 1 in real time; low-pressure carbon dioxide fire extinguishing When the system gas control panel is in normal standby state for normal maintenance, the operator opens the transparent glass door, which triggers the door control switch 5. The door control switch 5 sends a door opening signal to the voice controller 2.1. The voice controller 2.1 first plays a pre-recorded voice through the speaker 2.2: "Please note that all partition gas circuit main valves are in the open state. Do not turn any manual three-way valve." At this time, the operator only closes the partition gas circuit main valve 1.1 under the voice prompt; when the operator closes the partition gas circuit main valve 1.1 in the gas control unit 1, the main valve pneumatic valve limit switch 1.1.1 in the gas control unit 1 is actuated, and the voice prompt is turned off. The voice controller 2.1 detects that the main valve 1.1 of the zoned gas circuit in the gas control unit 1 is closed. At this time, the voice controller 2.1 plays a pre-recorded voice through the speaker 2.2: "Please note that the main valves of the gas circuits in the second, third and fourth zones are open. Do not turn the manual three-way valves in the second, third and fourth zones." When the main valves 1.1 of the zoned gas circuits in all gas control units 1 are closed, the voice controller 2.1 stops playing the voice. At this time, the operator can turn the manual three-way valves 1.3 one by one to check whether they can be turned normally by hand. If the manual three-way valve 1.3 in the gas control unit 1 is turned to check the action, if the manual three-way valve 1.3 is open, If the operator closes the manual three-way valve in zone 1 after the voice prompt, if the operator closes the glass door without opening the main gas circuit valve 1.1 of the gas control unit 1 after the maintenance, the voice controller 2.1 will play a pre-recorded voice through the speaker 2.2: "Please note that the main gas circuit valve in zone 1 is in the closed state, and the control function fails. Please open it". Through the above example, the operator can prevent wrong operation under the voice prompt. Embodiment three:

[0032] See the instruction manual Figure 3: Compared with the second embodiment, the control system 6 in the first or second embodiment is replaced by the PLC control unit 3 in this embodiment; the voice reminder unit 2 is electrically connected to the PLC control unit 3, the main valve pneumatic valve limit switch 1.1.1, the manual valve pneumatic valve limit switch 1.3.1, and the door switch 5, and the electric three-way valve 1.2 is electrically connected to the PLC control unit 3; in this embodiment, the switch states of the glass door, the partition gas circuit main valve 1.1, and the manual three-way valve 1.3 are transmitted to the PLC control unit 3 through the voice reminder unit, and the PLC control unit 3 monitors the switch states of the glass door, the partition gas circuit main valve 1.1, and the manual three-way valve 1.3 in real time; when the glass door is opened, the PLC control unit 3 sends a control instruction to the voice reminder unit 2 according to the switch states of the partition gas circuit main valve 1.1 and the manual three-way valve 1.3, and the voice reminder unit 2 plays the expected recorded voice prompt according to the control instruction; this embodiment is used for the electrical connection of the PLC control unit 3 and the gas control panel of the low-pressure carbon dioxide fire extinguishing system in the case where the distance is far. Embodiment 4:

[0033] See the instruction manual Figure 4 : Compared with the third embodiment, the PLC control unit 3 is electrically connected to the voice reminder unit 2, the main valve pneumatic valve limit switch 1.1.1, the manual valve pneumatic valve limit switch 1.3.1, and the electric three-way valve 1.2, and the voice reminder unit 2 is electrically connected to the door control switch 5; the switching state of the glass door is transmitted to the PLC control unit 3 through the voice reminder unit 2 for real-time monitoring, and the switching state of the partition gas circuit main valve 1.1 and the manual three-way valve 1.3 is directly monitored by the PLC control unit 3 in real time; this embodiment is used for the electrical connection of the PLC control unit 3 and the gas control panel of the low-pressure carbon dioxide fire extinguishing system when the distance is close.

[0034] The parts not described in detail in this utility model are prior art.

Claims

1. A low-pressure carbon dioxide fire extinguishing system gas control panel with voice reminder function, characterized by: The invention comprises a plurality of gas control units (1) and voice reminder units (2) arranged in parallel, wherein the gas control unit (1) is fixedly arranged in a gas control panel box of a fire extinguishing system, the voice reminder unit (2) is fixedly arranged on the gas control panel box of the fire extinguishing system, and the gas control unit (1) is electrically connected to the voice reminder unit (2); the gas control unit (1) is connected to a gas source unit (4) via a gas pipeline.

2. The low-pressure carbon dioxide fire extinguishing system gas control panel with voice reminder function according to claim 1 is characterized by: It also comprises a door-controlled switch (5), which is fixedly arranged on a door frame; a transparent glass door is hingedly arranged on the door frame, and the door-controlled switch (5) is triggered to act through the transparent glass door; the door-controlled switch (5) is electrically connected to the voice reminder unit (2).

3. The low-pressure carbon dioxide fire extinguishing system gas control panel with voice reminder function according to claim 1 or 2, characterized in that: The gas control unit (1) comprises a zone gas circuit main valve (1.1), an electric three-way valve (1.2), a manual three-way valve (1.3), and a zone selection valve driving device (1.4); one end of the zone gas circuit main valve (1.1) is connected to the gas source unit (4) through a gas pipeline, and the other end is connected to the electric three-way valve (1.2) and the manual three-way valve (1.3) through gas pipelines, respectively; the electric three-way valve (1.2) and the manual three-way valve (1.3) are also connected through a gas pipeline, and the manual three-way valve (1.3) and the zone selection valve driving device (1.4) are connected through a gas pipeline; a main valve pneumatic valve limit switch (1.1.1) is fixedly provided on the zone gas circuit main valve (1.1), and a manual valve pneumatic valve limit switch (1.3.1) is fixedly provided on the manual three-way valve (1.3).

4. The low-pressure carbon dioxide fire extinguishing system gas control panel with voice reminder function according to claim 3 is characterized by: The low-pressure carbon dioxide fire extinguishing system gas control panel is also electrically connected to a control system (6).

5. The low-pressure carbon dioxide fire extinguishing system gas control panel with voice reminder function according to claim 3 is characterized by: The low-pressure carbon dioxide fire extinguishing system gas control panel is also electrically connected to a PLC control unit (3).

6. The low-pressure carbon dioxide fire extinguishing system gas control panel with voice reminder function according to claim 4 is characterized by: The voice reminder unit (2) is electrically connected to the main valve pneumatic valve limit switch (1.1.1) and the manual valve pneumatic valve limit switch (1.3.1).

7. The low-pressure carbon dioxide fire extinguishing system gas control panel with voice reminder function according to claim 5 is characterized by: The voice reminder unit (2) is electrically connected to the PLC control unit (3), the main valve pneumatic valve limit switch (1.1.1), and the manual valve pneumatic valve limit switch (1.3.1).

8. The low-pressure carbon dioxide fire extinguishing system gas control panel with voice reminder function according to claim 5 is characterized by: The PLC control unit (3) is electrically connected to the voice reminder unit (2), the main valve pneumatic valve limit switch (1.1.1), and the manual valve pneumatic valve limit switch (1.3.1).

9. The low-pressure carbon dioxide fire extinguishing system gas control panel with voice reminder function according to claim 3 is characterized by: Identification plates are provided on the zoned gas circuit main valve (1.1) and the manual three-way valve (1.3).

10. The low-pressure carbon dioxide fire extinguishing system gas control panel with voice reminder function according to claim 3 is characterized by: A filter (1.6) is provided on the gas pipeline between the gas circuit main valve (1.1) and the electric three-way valve (1.2); and a quick exhaust valve (1.5) is provided on the gas pipeline connecting the manual three-way valve (1.3) and the partition selection valve drive device (1.4).

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