Water pre-filling main pipe type water spraying system

Abstract

The utility model relates to a water pre-filling main pipe type water spraying system. The water pre-filling main pipe type water spraying system comprises a gas detection probe, a monitoring and control system, a water storage device, a spraying pump, a partition remote control valve, a release valve, a remote control stop valve, a spraying head, a ventilation remote control valve and an overflow alarm box. The gas detection probe and the nozzle are mounted at a gas leakage position; the water storage device is connected with the spray head through a spray pipeline, and a release valve, a partition remote control valve and a remote control stop valve are sequentially mounted on the spray pipeline; the water storage device is further connected with the overflow alarm box through a spraying pipeline and a first ventilation pipe, and a ventilation remote control valve is installed on the first ventilation pipe. The monitoring and control system is used for controlling the spraying pump, the partition remote control valve, the ventilation remote control valve and the remote control stop valve to be opened and closed according to different leaked gas concentrations so as to achieve water pre-filling in the spraying pipeline and automatic water spraying of the spraying head. The release valve is used for releasing water in the spraying pipeline and the first vent pipe after water spraying is finished. Water does not need to be stored in the spraying pipeline for a long time.

Description

Technical Field

[0001] This application relates to the technical field of ships, and particularly refers to a pre-charged dry pipe water spray system. Background Art

[0002] Existing ships can use environmentally friendly alternative fuel liquid ammonia. For liquid ammonia fuel, since its molecular formula does not contain any carbon, the exhaust gas generated after combustion by an internal combustion engine can achieve zero carbon emissions. However, liquid ammonia and ammonia vapor after vaporization are toxic substances. When ammonia leaks occur on the ship, when the ammonia vapor reaches a certain concentration in the air, it will seriously endanger the respiratory and nervous systems of the crew and endanger life.

[0003] For ammonia fuel ships, ammonia fuel-related equipment, related pipeline valves and accessories are mainly arranged in the following three main locations:

[0004] 1. Ammonia Fuel Preparation Room (AFSS Room)

[0005] 2. Ammonia Fuel Tank Connection Space (Tank Connection Space, hereinafter referred to as TCS)

[0006] 3. Ammonia Fuel Bunkering Station (Bunkering Station Room)

[0007] There is a certain possibility that the valves and accessories in these locations are damaged, such as accidental collision resulting in leakage of liquid ammonia in the pipeline. Therefore, in order to reduce ammonia leakage, a wet pipe water spray system is usually adopted in these three locations.

[0008] The wet pipe water spray system fills the pipeline it includes with water so that when triggered, water can be sprayed to reach the protected location at the fastest speed. When ammonia leaks occur on the ship, the wet pipe water spray system starts to spray. Because the pipeline is filled with water for a long time, it is extremely easy to freeze in winter. For this situation, the conventional method is to use heating and insulation to prevent freezing. On the one hand, it increases the construction cost significantly, and on the other hand, the heat required for heating also consumes energy, thus reducing the energy efficiency of the ship. Therefore, it is necessary to develop a new type of water spray system. Utility Model Content

[0009] In view of the above problems in the prior art, this application provides a pre-charged dry pipe water spray system, the internal of the spray pipeline it includes does not need to store water for a long time, nor does it need to provide heating and insulation for outdoor pipelines.

[0010] To achieve the above object, this application provides a pre-charged dry pipe water spray system, including: gas detection probe, monitoring and control system, water storage device, spray pump, zone remote control valve, drain valve, remote control stop valve, sprinkler head, vent remote control valve, overflow alarm box;

[0011] The gas detection probe and the spray head are installed at the gas leakage point;

[0012] The water storage device is connected to the spray head through a spray pipeline, and a drain valve, a zoning remote control valve, and a remote control stop valve are sequentially installed on the spray pipeline; the water storage device is also connected to the overflow alarm box through a spray pipeline and a first vent pipe, and a vent remote control valve is installed on the first vent pipe;

[0013] The monitoring and control system is electrically connected to the gas detection probe, the spray pump, the zoning remote control valve, the vent remote control valve, and the remote control stop valve, and is used to control the opening and closing of the spray pump, the zoning remote control valve, the vent remote control valve, and the remote control stop valve according to different leakage gas concentrations detected by the gas detection probe, so as to realize pre-charging water in the spray pipeline and automatic water spraying of the spray head;

[0014] The drain valve is used for: draining the water in the spray pipeline and the first vent pipe after the water spraying is completed.

[0015] As described above, in this application, the leakage gas concentration is detected by the gas detection probe, and the monitoring and control system controls the opening and closing of the spray pump, the zoning remote control valve, the vent remote control valve, and the remote control stop valve according to different leakage gas concentrations, so as to realize pre-charging water in the spray pipeline and automatic water spraying of the spray head. In this way, the spray pipeline is not always filled with water, but water is filled into the pipeline only when the gas leaks to a certain concentration, and water is sprayed when reaching another concentration. After the water spraying is completed, the drain valve drains the water in the spray pipeline and the first vent pipe. In this way, through the automatic pre-charging water method, this system can still be used in an environment where the temperature is lower than 0°C, and there is no need to store water in the spray pipeline for a long time, nor is it necessary to provide heating and insulation for the outdoor pipeline.

[0016] As a possible implementation manner of the first aspect, the gas detection probe, the spray head, the zoning remote control valve, the remote control stop valve, and the vent remote control valve include multiple;

[0017] The spray pipeline and the first vent pipe include multiple;

[0018] At least one of the spray heads, one zoning remote control valve, and one remote control stop valve are installed on one spray pipeline, and one vent remote control valve is installed on one first vent pipe;

[0019] At least one of the gas detection probes corresponds to one spray pipeline.

[0020] As described above, since there are multiple gas leakage points, multiple gas detection probes can be included, with at least one at each leakage point, and thus multiple spray pipelines and multiple first vent pipes can be included. Furthermore, at least one of the nozzles, one zone remote control valve, and one remote cut-off valve are installed on one of the spray pipelines, and one vent remote control valve is installed on one of the first vent pipes. Moreover, each spray pipeline includes at least one nozzle, so that spraying can be carried out for multiple leakage points.

[0021] As a possible implementation manner of the first aspect, the installation position of the overflow alarm box is higher than the installation positions of the spray pipeline and the first vent pipe.

[0022] As described above, the position of the overflow alarm box is higher than the height of all the spray pipelines, so that it can be ensured that when pre-filling water, the water will first fill the pipelines and then flow into the alarm box to trigger a high-level alarm and stop the pump.

[0023] As a possible implementation manner of the first aspect, the overflow alarm box includes a first float-type liquid level control switch and a second float-type liquid level control switch;

[0024] The first float-type liquid level control switch is used to generate an alarm when the liquid level exceeds a preset liquid level height;

[0025] The second float-type liquid level control switch is used to stop the spray pump when the liquid level exceeds the preset liquid level height.

[0026] As described above, the first float-type liquid level control switch and the second float-type liquid level control switch are used to provide an alarm and stop the pump, so that it can be determined whether the pre-filling of water in the pipeline is completed.

[0027] As a possible implementation manner of the first aspect, the installation position of the drain valve is lower than the installation positions of the spray pipeline and the first vent pipe.

[0028] As described above, by setting the installation position of the drain valve to the lowest point of the spray pipeline, the residual water in the pipeline can be drained completely so that there is no water stored in the pipeline.

[0029] As a possible implementation manner of the first aspect, it further includes: a check valve, installed between the spray pump and the zone remote control valve, for maintaining the pre-filled water level in the spray pipeline.

[0030] As described above, by setting the check valve, the pre-filled water level in the spray pipeline can be maintained and will not flow back into the water storage device.

[0031] As a possible implementation manner of the first aspect, it further includes: a low-level alarm device, arranged in the water storage device.

[0032] As described above, when the water level in the water storage device is too low, the low-level alarm device can be used to give an alarm, reminding how much longer the water in the water storage device can be used and prompting to store water in the water storage device.

[0033] As a possible implementation of the first aspect, it further includes: a filter installed between the water storage device and the spray pump.

[0034] As described above, a filter can be provided between the water storage device and the spray pump to prevent impurities in the water storage device from entering the spray pump and blocking the spray pump.

[0035] As a possible implementation of the first aspect, it further includes: a normally open stop valve installed between the water storage device and the filter.

[0036] As a possible implementation of the first aspect, it further includes: a second breather pipe installed at the upper end of the overflow alarm box for discharging the air in the overflow alarm box.

[0037] As described above, the air in the overflow alarm box can be discharged through the second breather pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic structural diagram of a pre-charged dry pipe water spray system provided by an embodiment of the present application.

[0039] It should be understood that in the above schematic structural diagram, the sizes and shapes of the respective block diagrams are for reference only and should not constitute an exclusive interpretation of the embodiments of the present utility model. The relative positions and inclusion relationships between the respective block diagrams presented in the schematic structural diagram only schematically represent the structural associations between the block diagrams and do not limit the physical connection manners of the embodiments of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] The following examples are given in conjunction with the accompanying drawings to further illustrate the technical solutions provided by the present application. It should be understood that the system structures and service scenarios provided in the embodiments of the present application are mainly for explaining possible implementation manners of the technical solutions of the present application and should not be construed as the only limitation of the technical solutions of the present application. Those of ordinary skill in the art will know that with the evolution of the system structure and the emergence of new service scenarios, the technical solutions provided by the present application are equally applicable to similar technical problems.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. In case of inconsistency, the meaning described in this specification or the meaning derived from the content recorded in this specification shall prevail. In addition, the terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application. For the purpose of accurately describing the technical content in this application and for accurately understanding this utility model, the following explanatory notes or definitions are given to the terms used in this specification before describing the specific embodiments.

[0042] This application provides a pre-charged water dry pipe type water spray system, including: a gas detection probe, a monitoring and control system, a water storage device, a spray pump, a sectional remote control valve, a drain valve, a remote control stop valve, a sprinkler head, a ventilation remote control valve, and an overflow alarm box;

[0043] The gas detection probe and the sprinkler head are installed at the gas leakage location;

[0044] The water storage device is connected to the sprinkler head through a spray pipeline, and the drain valve, the sectional remote control valve, and the remote control stop valve are sequentially installed on the spray pipeline; the water storage device is also connected to the overflow alarm box through a spray pipeline and a first breather pipe, and a ventilation remote control valve is installed on the first breather pipe;

[0045] The monitoring and control system is electrically connected to the gas detection probe, the spray pump, the sectional remote control valve, the ventilation remote control valve, and the remote control stop valve, and is used to control the opening and closing of the spray pump, the sectional remote control valve, the ventilation remote control valve, and the remote control stop valve according to different leakage gas concentrations detected by the gas detection probe, so as to realize pre-charging water in the spray pipeline and automatic water spraying of the sprinkler head;

[0046] The drain valve is used to drain the water in the spray pipeline and the first breather pipe after the water spraying is completed.

[0047] As described above, this application detects the leakage gas concentration through the gas detection probe, and the monitoring and control system controls the opening and closing of the spray pump, the sectional remote control valve, the ventilation remote control valve, and the remote control stop valve according to different leakage gas concentrations, so as to realize pre-charging water in the spray pipeline and automatic water spraying of the sprinkler head. In this way, the spray pipeline is not always filled with water, but water is filled into the pipeline only when the gas leaks to a certain concentration, and water is sprayed when reaching another concentration. After the water spraying is completed, the drain valve drains the water in the spray pipeline and the first breather pipe. In this way, through the automatic pre-charging water method, this system can still be used in an environment where the temperature is lower than 0°C, and there is no need to store water in the spray pipeline for a long time, nor is it necessary to provide heating and insulation for outdoor pipelines.

[0048] As a possible implementation of the first aspect, there are multiple gas detection probes, spray nozzles, zone remote control valves, remote control stop valves, and ventilation remote control valves;

[0049] There are multiple spray pipelines and first ventilation pipelines;

[0050] At least one spray nozzle, one zone remote control valve, and one remote control stop valve are installed on one spray pipeline, and one ventilation remote control valve is installed on one first ventilation pipeline;

[0051] At least one gas detection probe corresponds to one spray pipeline.

[0052] From the above, because there are multiple gas leakage points, multiple gas detection probes can be included, at least one can be included at each leakage point, and thus multiple spray pipelines and multiple first ventilation pipelines can be included. Furthermore, at least one spray nozzle, one zone remote control valve, and one remote control stop valve are installed on one spray pipeline, one ventilation remote control valve is installed on one first ventilation pipeline, and at least one spray nozzle is included on each spray pipeline, so that spraying can be carried out for multiple leakage points.

[0053] As a possible implementation of the first aspect, the installation position of the overflow alarm box is higher than the installation positions of the spray pipeline and the first ventilation pipeline.

[0054] From the above, the position of the overflow alarm box is higher than the height of all spray pipelines, so that it can be ensured that when pre-filling water, the water will first fill the pipelines and then flow into the alarm box to trigger a high-level alarm and stop the pump.

[0055] As a possible implementation of the first aspect, the overflow alarm box includes a first float-type liquid level control switch and a second float-type liquid level control switch;

[0056] The first float-type liquid level control switch is used to generate an alarm when the liquid level exceeds the preset liquid level height;

[0057] The second float-type liquid level control switch is used to stop the spray pump when the liquid level exceeds the preset liquid level height.

[0058] From the above, the first float-type liquid level control switch and the second float-type liquid level control switch are used to provide an alarm and stop the pump, so that it can be determined whether the pre-filling of water in the pipeline is completed.

[0059] As a possible implementation of the first aspect, the installation position of the drain valve is lower than the installation positions of the spray pipeline and the first ventilation pipeline.

[0060] As described above, the installation position of the drain valve is set to the lowest point of the spray pipeline, so that the residual water in the pipeline can be drained completely, and no water will be stored in the pipeline.

[0061] As a possible implementation manner of the first aspect, it further includes: a check valve, installed between the spray pump and the zone remote control valve, for maintaining the pre-charge water level in the spray pipeline.

[0062] As described above, by setting the check valve, the pre-charge water level in the spray pipeline can be maintained and will not flow back into the water storage device.

[0063] As a possible implementation manner of the first aspect, it further includes: a low-level alarm device, arranged in the water storage device.

[0064] As described above, when the water level in the water storage device is too low, the low-level alarm device can give an alarm to remind how long the water in the water storage device can still be used and to remind to store water in the water storage device.

[0065] As a possible implementation manner of the first aspect, it further includes: a filter, installed between the water storage device and the spray pump.

[0066] As described above, a filter can be set between the water storage device and the spray pump to prevent impurities in the water storage device from entering the spray pump and blocking the spray pump.

[0067] As a possible implementation manner of the first aspect, it further includes: a normally open stop valve, installed between the water storage device and the filter.

[0068] As a possible implementation manner of the first aspect, it further includes: a second breather pipe, installed at the upper end of the overflow alarm box, for discharging the air in the overflow alarm box.

[0069] As described above, the air in the overflow alarm box can be discharged through the second breather pipe.

[0070] Next, regarding Figure 1 A detailed description will be given to the pre-charged water dry pipe type water spray system proposed in this application.

[0071] As Figure 1 shown, the pre-charged water dry pipe type water spray system includes an ammonia detection probe (1), zone remote control valves (2, 3, 4), vent remote control valves (5, 6, 7), an overflow alarm box (8), a water storage device (9), a check valve (10), remote control stop valves (11, 12, 13), sprinkler heads (14), a drain valve (15), a spray pump (16), a filter (17), a normally open stop valve (18), and a monitoring and control system (19).

[0072] Among them, the overflow alarm box (8) is connected to one end of the overflow pipeline, and a stop valve (18), a filter (17), a spray pump (16), a check valve (10), and a relief valve (15) are successively installed on the overflow pipeline. After reaching the installation position of the relief valve (15), the spray pipeline is divided into three spray pipelines, and on each of the three spray pipelines, a zone remote control valve (2, 3, 4), a remote control stop valve (11, 12, 13), and an ammonia detection probe (1) are successively installed. A breather pipe is externally connected to each of the spray pipelines between the zone remote control valves (2, 3, 4) and the remote control stop valves (11, 12, 13), a breather remote control valve (5, 6, 7) is installed on the breather pipe, the other end of the breather pipe is connected to the overflow alarm box (8), and a breather pipe is also externally connected to the highest end of the overflow alarm box (8).

[0073] (1) Ammonia detection probe (1)

[0074] For ammonia fuel ships, ammonia fuel-related equipment, related pipeline valves and accessories are mainly arranged in the following three main places:

[0075] 1. Ammonia Fuel Supply System Room (AFSS Room)

[0076] 2. Tank Connection Space (hereinafter referred to as TCS)

[0077] 3. Ammonia Fuel Bunkering Station

[0078] Therefore, ammonia detection probes (1) are installed at these three ammonia leakage locations. One ammonia detection probe (1) can be installed at each location, or multiple ammonia detection probes (1) can be installed.

[0079] Since the proposed system is a pre-filled water dry pipe type water spray system, the ammonia detection probe (1) is set to pre-fill water when the detected leakage gas concentration reaches the first concentration and to spray water when it reaches the second concentration. The first concentration and the second concentration are determined according to different standards. This application is for ammonia, and the standards are as follows:

[0080] (1) The impact of the concentration of ammonia in the air on the human body depends on the contact time and method, and different standards have different regulations. Generally speaking, the lowest detectable concentration of ammonia is 5.3 ppm, and the lowest lethal concentration is 5000 ppm.

[0081] (2) According to the Indoor Air Quality Standard GB / T 18883-2002, the maximum allowable concentration of ammonia in indoor air is 0.2 mg / m 3 , that is, 0.2635 ppm.

[0082] (3) According to the "Hygienic Standards for Design of Industrial Enterprises" TJ36-79, the maximum allowable concentration of harmful substances in the air of the workshop, for ammonia, is 30 mg / m 3 (equivalent to 39.53 ppm).

[0083] (4) According to the "Design Standard for Detection and Alarm of Combustible and Toxic Gases in Petrochemical Industry" GB / T 50493, the first-level alarm set value of toxic gases should be less than or equal to 100% OEL (Occupational Exposure Limit), and the second-level alarm set value of toxic gases should be less than or equal to 200% OEL. For ammonia, the OEL is 25 ppm. Therefore, the first-level alarm value is 25 ppm, and the second-level alarm value is 50 ppm.

[0084] (5) According to the content of DNV Specification Pt.6 Ch.2 section14 GAS FUELLED SHIPINSTALLATIONS - GASFUELLED AMMONIA (2023 version) 10.2.4.6 and the content of DNV Specification Pt.6 Ch.2 section14 GAS FUELLEDSHIPINSTALLATIONS - GAS FUELLED AMMONIA (2023 version) 6.1.1.8, it can be known that the DNV Classification Society requires the minimum alarm value of ammonia to be 150 ppm, and the ammonia concentration value for triggering the protection action should be about 350 ppm.

[0085] Based on the comprehensive comparison and research of the above standards, and with a high degree of emphasis on human life safety, the trigger alarm value of the sprinkler system proposed in this application is set at 50 ppm, far exceeding the standard required by the classification society. When the ammonia concentration reaches 50 ppm (the first concentration), the water sprinkler system is automatically triggered to pre-fill the pipeline with water. When the ammonia concentration reaches 350 ppm (the second concentration), the sprinkler system automatically starts the sprinkler operation.

[0086] (2) Sprinkler Head (14)

[0087] Sprinkler heads (14) are also installed at the three ammonia leakage locations mentioned above. One sprinkler head (14) can be installed at each ammonia leakage location, or multiple sprinkler heads (14) can be installed.

[0088] Specifically, the design of the sprinkler head (14) should be able to meet the water volume requirement of 10 L / min / ㎡. And the number and position of the sprinkler heads (14) should enable the water mist to cover the entire space.

[0089] (3) Water Storage Device (9)

[0090] The water storage device (9) can store fresh water or seawater as the sprinkling medium. That is, the water storage device (9) can be a fresh water tank (or seawater tank).

[0091] As Figure 1 shown, a low-level alarm device (91) should be designed in the water storage device (9). The liquid level of the water storage device (9) is detected by the low-level alarm device (91), and its lowest water level should be able to meet the water volume for spraying the largest protected area for 20 minutes (or other).

[0092] (IV) Check valve (10), drain valve (15), spray pump (16), filter (17), normally open stop valve (18),

[0093] A stop valve (18), a filter (17), a spray pump (16), a check valve (10), and a drain valve (15) are successively installed on the spray pipeline externally connected to the water storage device (9).

[0094] Among them, the normally open stop valve (18) is in the normally open state, that is, the pipeline between the water storage device (9) and the spray pump (16) always has water. The function of the normally open stop valve is that usually the system is in a standby state, so as the source of spray water, this valve cannot be closed, otherwise there will be no water available, so it is normally open. Only when the system is under maintenance, for example, when cleaning the filter (17) or replacing the blades of the spray pump (16), and it is necessary to remove the filter (17) or the spray pump (16), this stop valve needs to be closed at this time to cut off the water source.

[0095] The filter (17) between the water storage device (9) and the spray pump (16) is used to filter impurities in the water in the water storage device (9) to prevent impurities from blocking the spray pump (16) and the subsequent spray pipeline.

[0096] The check valve (10) is used to maintain the water level when water enters the spray pipeline and no longer pre-fills the spray pipeline, and prevent the water entering the spray pipeline from flowing back to the water storage device (9).

[0097] The drain valve (15) needs to be installed at the lowest point of the spray pipeline. After the pre-charged dry pipe water spray system is used, the drain valve (15) can be opened, so as to ensure that the residual water in the spray pipeline is discharged to the ship's bilge water system, and then closed after discharging. The drain valve (15) can be manually controlled or controlled to open and close by the monitoring and control system.

[0098] If the protected area is located at a position lower than the spray pump, that is, the situation where the spray pipeline is also lower than the height of the spray pump, then it is necessary to additionally set a separate drain valve at the lowest point of this special spray pipeline.

[0099] (V) Zone remote control valves (2, 3, 4), vent remote control valves (5, 6, 7) and remote control stop valves (11, 12, 13)

[0100] According to the above three ammonia leakage points, three spray pipelines and three vent pipes need to be set up. Then, a sectional remote control valve and a remote control stop valve are installed on each spray pipeline, and a vent remote control valve is installed on one vent pipe.

[0101] Among them, the installation positions of the three vent pipes are higher than those of the three spray pipelines, so that the gas in the pipelines can be drained completely.

[0102] (VI) Overflow alarm box (8)

[0103] Two float type liquid level control switches, namely the first float type liquid level control switch (81) and the second float type liquid level control switch (82), should be set inside the overflow alarm box (8). These two switches provide alarm and pump stop respectively. That is, the first float type liquid level control switch (81) is used to generate an alarm when the liquid level exceeds the preset liquid level height; the second float type liquid level control switch (82) is used to stop the spray pump when the liquid level exceeds the preset liquid level height.

[0104] The installation position of the overflow alarm box (8) is higher than the height of all spray pipelines, so as to ensure that when pre-filling water, the water will first fill the pipelines and then flow into the overflow alarm box (8) to trigger the high-level alarm and pump stop. If the overflow alarm box (8) is lower than the spray pipelines, the water will first enter the overflow alarm box (8), and after triggering the alarm and pump stop, the water will stop, but at this time the pipelines are not yet filled with water.

[0105] As above, through the first float type liquid level control switch and the second float type liquid level control switch to provide alarm and pump stop, it can be determined whether the pre-filling water in the pipeline is completed.

[0106] (VII) Monitoring and control system (19)

[0107] The monitoring and control system (19) is electrically connected to the ammonia detection probe (1), sectional remote control valves (2, 3, 4), vent remote control valves (5, 6, 7), relief valve (15) (which can be manually controlled), spray pump (16), remote control stop valves (11, 12, 13), first float type liquid level control switch (81), second float type liquid level control switch (82), low-level alarm device (91). The monitoring and control system receives the gas concentration detected by the ammonia detection probe (1), and controls the opening and closing of the sectional remote control valves (2, 3, 4), vent remote control valves (5, 6, 7), relief valve (15), spray pump (16), remote control stop valves (11, 12, 13), first float type liquid level control switch (81), second float type liquid level control switch (82), low-level alarm device (91).

[0108] The specific working process of the pre-filling water dry pipe type water spray system proposed in this application is as follows:

[0109] When the ammonia gas detection probe (1) detects that the ammonia gas concentration in one or more protected premises reaches 50 ppm, it notifies the concentration value to the monitoring and control system (19), and the pre-charged dry-pipe water spray system gets ready for spraying and enters the water filling operation. The monitoring and control system (19) controls the sectional remote control valves (2 or 3 or 4) and the ventilation remote control valves (5 or 6 or 7) of the corresponding release premises to automatically open as required, and the spray pump (16) operates to pump the water in the water storage device (9) into the spray pipeline, so that one or several corresponding spray pipelines are filled with water. The air in the spray pipeline is squeezed and discharged into the overflow alarm box (8) by the injected water through the breather pipe until the water level in the overflow alarm box (8) rises to the high liquid level and the pump stops, and the spray pump (16) stops operating. The pre-charging operation is completed. The monitoring and control system (19) controls the ventilation remote control valves (5 or 6 or 7) of the corresponding release premises to automatically close, and the water level in the spray pipeline is maintained through the check valve (10).

[0110] When the ammonia gas detection probe (1) detects that the ammonia gas concentration in the protected premises rises to 350 ppm, it notifies the concentration value to the monitoring and control system (19), and the pre-charged dry-pipe water spray system gets ready for spraying. The monitoring and control system (19) controls the remote control stop valves (11 or 12 or 13) of the corresponding release premises to open as required, and the water can reach the spray heads (14) to start the spraying operation. At this time, the monitoring and control system (19) will control the spray pump (16) to run again. At this time, the sectional remote control valves (2 or 3 or 4) are still in the open state, and the water can continuously be pumped from the water storage device (9) into the spray pipeline.

[0111] After the system is used, the ammonia gas in the corresponding premises is diluted, and then the monitoring and control system (19) controls the remote control stop valves (11 or 12 or 13) and the spray pump (16) of the corresponding premises to automatically close. The monitoring and control system (19) opens the ventilation remote control valves (5 or 6 or 7) of the corresponding release premises, and then manually opens the manual drain valve (15) installed at the lowest point of the system pipeline to ensure that the residual water in the pipeline is drained into the ship's bilge water system. Finally, the monitoring and control system (19) controls to close the sectional remote control stop valves (2 or 3 or 4) and the ventilation remote control valves (5 or 6 or 7) of the corresponding release premises. The pre-charged dry-pipe water spray system is restored to the initial state to get ready for the next use.

[0112] When the ammonia detection probe (1) detects that the ammonia concentration in the protected area reaches 50 ppm or 350 ppm, it will notify the monitoring and control system, automatically determine which leakage area sent the alarm, and then specifically display it on the liquid crystal screen of the console in the fire control station, with clear area indication and real-time ammonia concentration display. The crew should observe the situation inside the alarm area through CCTV (Closed-Circuit Television, representing closed-circuit television for security monitoring), and promptly notify the internal staff to evacuate as soon as possible through communication equipment. There is also an audible and visual alarm inside the protected area to synchronously notify the staff on the site. This sprinkler system can also be manually activated by the personnel in the fire control station.

[0113] In summary, based on the existing ammonia fuel ship design, this application adds a new type of water sprinkler system to all areas where ammonia leakage may occur, so as to be able to detect the leakage in a timely manner and automatically trigger the water sprinkler system when ammonia leakage occurs. The sprayed water mist can absorb the ammonia vapor released into the air, and at the same time reduce the amount of toxic ammonia vapor diffused to the outside through the ventilation system, thus preventing the crew on board from inhaling excessive amounts of toxic ammonia vapor and reducing the health impact on the crew.

[0114] This system can use seawater or fresh water as the sprinkling medium. In order to reduce the time for the sprinkling water to reach the protected area and achieve the purpose of rapid response, this system adopts a pre-charged dry pipe system design, that is, when the water sprinkler system receives a low-concentration alarm, the pipeline starts to be filled with water. Once a high concentration of ammonia is detected and a water spraying instruction is received, the system immediately sprays water from the nozzles, and the system operates completely automatically.

[0115] Through the automatic pre-charging of water, this system can still be used in an environment where the temperature is below 0°C. There is no need for long-term water storage inside the sprinkler pipeline, nor is it necessary to provide heating and insulation for outdoor pipelines, which can reduce the cost and energy consumption of ship pipeline anti-freezing.

[0116] The term "comprising" used in the specification and claims should not be construed as being limited to the content listed thereafter; it does not exclude other elements or steps. Therefore, it should be interpreted as specifying the presence of the mentioned features, wholes, steps or components, but does not exclude the presence or addition of one or more other features, wholes, steps or components and their groups. Therefore, the expression "equipment comprising device A and B" should not be limited to equipment consisting only of components A and B.

[0117] As used herein, the term "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrase "in one embodiment" or "in an embodiment" in various places in this specification are not necessarily all referring to the same embodiment, but may refer to the same embodiment. In addition, in one or more embodiments, the various specific features, structures, or characteristics can be combined in any suitable manner, as will be apparent to those of ordinary skill in the art from the present disclosure.

[0118] Note that the above is only a preferred embodiment of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments. Without departing from the concept of the present application, more other equivalent embodiments can be included, all of which fall within the protection scope of the present application.

Claims

1. A pre-filled water main pipe water sprinkler system, characterized in that: include: Gas detection probe, monitoring and control system, water storage device, sprinkler pump, zone remote control valve, discharge valve, remote control stop valve, sprinkler head, ventilated remote control valve, overflow alarm box; The gas detection probe and the nozzle are installed at the gas leakage location; The water storage device is connected to the sprinkler head through a sprinkler pipeline, on which the discharge valve, the partition remote control valve, and the remote control stop valve are sequentially installed; the water storage device is also connected to the overflow alarm box through a sprinkler pipeline and a first vent pipe, on which a vent remote control valve is installed; The monitoring and control system is electrically connected to the gas detection probe, the spray pump, the partition remote control valve, the ventilated remote control valve, and the remote control stop valve, and is used to control the spray pump, the partition remote control valve, the ventilated remote control valve, and the remote control stop valve to open and close according to different leakage gas concentrations detected by the gas detection probe, so as to realize pre-filling of water in the spray pipeline and automatic water spraying of the sprinkler head; The discharge valve is used to discharge the water in the spray pipeline and the first air pipe after the water spraying is completed.

2. The pre-filled water main pipe water sprinkler system according to claim 1, characterized in that: The gas detection probe, the nozzle, the partition remote control valve, the remote control stop valve and the ventilated remote control valve include a plurality of them; The spray pipeline and the first vent pipe include a plurality of them; At least one of the spray heads, one of the partition remote control valves, and one of the remote control stop valves are installed on one of the spray pipelines, and one of the vent remote control valves is installed on one of the first vent pipes; At least one of the gas detection probes corresponds to one of the spray pipelines.

3. The pre-filled water main pipe water sprinkler system according to claim 1, characterized in that: The installation position of the overflow alarm box is higher than the installation positions of the spray pipeline and the first vent pipe.

4. The pre-filled water main pipe water sprinkler system according to claim 1, characterized in that: The overflow alarm box includes a first float type liquid level control switch and a second float type liquid level control switch; The first float type liquid level control switch is used to generate an alarm when the liquid level exceeds a preset liquid level height; The second float type liquid level control switch is used to stop the spray pump when the liquid level exceeds a preset liquid level height.

5. The pre-filled water main pipe water sprinkler system according to claim 1, characterized in that: The installation position of the discharge valve is lower than the installation positions of the spray pipeline and the first air vent pipe.

6. The pre-filled water main pipe water sprinkler system according to claim 1, characterized in that: Also includes: A check valve is installed between the spray pump and the partition remote control valve to maintain the pre-filled water level in the spray pipeline.

7. The pre-filled water main pipe water sprinkler system according to claim 1, characterized in that: Also includes: A low-level alarm device is arranged in the water storage device.

8. The pre-filled water main pipe water sprinkler system according to claim 1, characterized in that: Also includes: The filter is installed between the water storage device and the spray pump.

9. The pre-filled water main pipe water sprinkler system according to claim 8, characterized in that: Also includes: A normally open stop valve is installed between the water storage device and the filter.

10. The pre-filled water main pipe water sprinkler system according to claim 1, characterized in that: Also includes: A second air vent is installed at the upper end of the overflow alarm box and is used to exhaust the air in the overflow alarm box.

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