Simple spraying automatic fire extinguishing device

Abstract

The invention discloses a simple spraying automatic fire extinguishing device, and relates to the field of fire fighting equipment, the simple spraying automatic fire extinguishing device comprises a fixed shell, a fire detection structure is arranged in the fixed shell, a booster pump is arranged in the fixed shell and is connected with an external water source, a conveying control valve is connected with a water outlet of the booster pump, and a water spraying assembly is connected with the conveying control valve; the system further comprises a pressure stabilizing structure, the pressure stabilizing structure comprises a pressure stabilizing tank, the pressure stabilizing tank is arranged between an external water source and the booster pump, the flexible pressure stabilizing part is arranged in the pressure stabilizing tank and divides the pressure stabilizing tank into a water storage cavity and a pressure stabilizing cavity, and the water storage cavity is arranged at the bottom of the pressure stabilizing tank and connected with the external water source and the booster pump. The pressure stabilizing cavity is formed in the top of the pressure stabilizing tank; the simple spraying automatic fire extinguishing device can realize stable water pressure in the conveying process of fire-fighting water from an external water source to the water spraying assembly, so that the water spraying assembly can form effective fire extinguishing water mist or water flow, and the fire extinguishing effect is ensured.

Description

Technical Field

[0001] This invention relates to the field of fire-fighting equipment, specifically a simple automatic sprinkler fire extinguishing device. Background Technology

[0002] Simple automatic sprinkler fire suppression systems are increasingly used in small locations due to their low cost and flexible deployment. Existing simple automatic sprinkler fire suppression systems are typically connected directly to an external water source, relying on municipal water supply pressure or a simple booster pump to provide water pressure. However, in actual use, the external water pressure fluctuates significantly, especially during peak water usage periods, where sudden drops in water pressure are common. When the water pressure is insufficient, the sprinkler components cannot form an effective fire-extinguishing mist or flow, resulting in a significant decrease in fire-extinguishing effectiveness, or even failure to extinguish the fire. Furthermore, drastic water pressure fluctuations can impact internal components such as pipes and valves, shortening equipment lifespan and increasing maintenance costs. Summary of the Invention

[0003] The purpose of this invention is to provide a simple automatic sprinkler fire extinguishing device. This simple automatic sprinkler fire extinguishing device can stabilize the water pressure during the transportation of fire-fighting water from an external water source to the sprinkler assembly, thereby ensuring that the sprinkler assembly can form an effective fire-extinguishing water mist or water flow and ensuring the fire extinguishing effect.

[0004] The above-mentioned optimized structure of the present invention is achieved through the following technical solution: a simple automatic sprinkler fire extinguishing device, including a fixed shell; A fire detection structure, wherein the fire detection structure is disposed within the fixed shell; A booster pump, which is located inside the fixed housing and connected to an external water source; A delivery control valve is connected to the outlet of the booster pump; A water spray assembly, which is connected to the delivery control valve; It also includes a pressure stabilizing structure, which includes a pressure stabilizing tank located between the external water source and the booster pump; A flexible pressure stabilizer is provided inside the pressure stabilizing tank, dividing the pressure stabilizing tank into a water storage chamber and a pressure stabilizing chamber. The water storage chamber is located at the bottom of the pressure stabilizing tank and is connected to an external water source and the booster pump. The pressure stabilizing chamber is located at the top of the pressure stabilizing tank.

[0005] In some embodiments, the pressure stabilizing structure further includes a high-pressure gas cylinder, which stores high-pressure gas and is connected to the pressure stabilizing chamber; A pressure maintaining valve is provided between the high-pressure gas cylinder and the pressure stabilizing chamber.

[0006] In some embodiments, a filtration structure is also included, the filtration structure including a first filtration component disposed between the pressure stabilizing tank and an external water source; The second filter assembly is located between the water spray assembly and the delivery control valve.

[0007] In some embodiments, the first filter assembly includes a first connecting pipe disposed between the booster pump and an external water source; A coarse filter element is disposed inside the first connecting pipe, which can achieve preliminary filtration of the water flowing to the booster pump.

[0008] In some embodiments, the first connecting pipe includes a first connecting portion, which is connected to an external water source; The second connecting part is connected to the booster pump; The filter section is connected to both the first connecting section and the second connecting section, and the filter section contains the coarse filter element.

[0009] In some embodiments, the coarse filter element includes two fixing rings, which are coaxially disposed at the connection between the filter part and the first connecting part, and at the end of the filter part away from the first connecting part. A fixing frame, which is coaxially disposed between the two fixing rings; A filter screen ring is coaxially disposed within the fixed frame.

[0010] In some embodiments, the coarse filter element further includes a plurality of guide vanes, which are arranged in a ring on the inner wall of the filter screen ring.

[0011] In some embodiments, the coarse filter element further includes a rotating groove, which is coaxially disposed on the outer wall of the fixed ring; Multiple ball bearings are arranged in a ring on the inner wall of the fixed frame and are rotatably disposed in the rotating groove.

[0012] In some embodiments, the second filtration assembly includes two fine filter elements, which are disposed in parallel between the water spray assembly and the delivery control valve. A switching valve is disposed between the delivery control valve and the two fine filter elements; A differential pressure sensor is disposed between the switching valve and the fine filter element and is electrically connected to the switching valve.

[0013] In some embodiments, an audible and visual alarm is also included, which is disposed on the fixed housing and electrically connected to the fire detection structure.

[0014] The above-described technical solutions in the embodiments of the present invention have at least the following technical effects or advantages: (1) The present invention uses a flexible pressure stabilizing component inside the pressure stabilizing tank to divide the pressure stabilizing tank into a water storage chamber and a pressure stabilizing chamber. The pressure stabilizing chamber is filled with high-pressure gas. When the external water source pressure fluctuates, the high-pressure gas in the pressure stabilizing chamber exerts pressure on the water in the water storage chamber through the flexible pressure stabilizing component, thus keeping the water pressure in the water storage chamber stable. At the same time, the high-pressure gas cylinder and the pressure maintaining valve can maintain the pressure in the pressure stabilizing chamber within a set range, further ensuring the stability of the water pressure. The stable water pressure allows the water spray assembly to spray water mist or water flow at a specified pressure, effectively covering the protected area and ensuring the fire extinguishing effect.

[0015] (2) The present invention has a two-stage filtration structure. The first filter component can filter larger particulate impurities in the water, which can prevent larger particulate impurities from damaging the flexible pressure stabilizer. At the same time, the second filter component can filter fine particulate impurities in the water. The combination of the two-stage filtration improves the filtration effect and effectively prevents the nozzle of the water spray component from clogging and the wear of components such as the booster pump and delivery control valve.

[0016] (3) The fixing frame of the coarse filter element can rotate under the impact of water flow, so that each area of ​​the filter screen ring is in uniform contact with the water flow, reducing the local impact of impurities on the filter screen ring. At the same time, the rotating filter screen ring can generate centrifugal force, further gathering impurities at the end of the filter part away from the first connection part, avoiding the accumulation of impurities on the movement path of the water flow, thereby enhancing the impurity interception effect and improving the filtration efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the fixing shell of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the structure of the first filter component of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle; In the diagram: 1. Fixed housing; 2. Fire detection structure; 3. Booster pump; 4. Delivery control valve; 5. Sprinkler assembly; 6. Filter structure; 61. First connecting pipe; 611. First connecting part; 612. Second connecting part; 613. Filter part; 62. Coarse filter element; 621. Fixing ring; 622. Fixing frame; 623. Filter screen ring; 624. Guide vane; 625. Rotating groove; 626. Ball bearing; 63. Fine filter element; 64. Switching valve; 7. Pressure stabilizing structure; 71. Pressure stabilizing tank; 72. Flexible pressure stabilizing element; 73. Water storage chamber; 74. Pressure stabilizing chamber; 75. High-pressure gas cylinder; 76. Pressure maintaining valve; 8. Audible and visual alarm. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] refer to Figure 1-5A simple automatic sprinkler fire extinguishing device includes a fixed housing 1, a fire detection structure 2, a booster pump 3, a delivery control valve 4, a water spray assembly 5, a filter structure 6, and a pressure stabilizing structure 7. The fixed housing 1 serves as the load-bearing foundation of the device. The fixed housing 1 can be a cuboid structure made of cold-rolled steel plate with a thickness of 2-3mm, and its surface is treated with electrostatic spraying for good rust resistance. The top of the fixed housing 1 may have a hoisting hole, and the bottom has an installation hole, allowing for hoisting or floor installation according to actual needs. An installation chamber is reserved inside the fixed housing 1 for integrating the booster pump 3, delivery control valve 4, water spray assembly 5, filter structure 6, and pressure stabilizing structure 7. The fire detection structure 2 is located at the top center inside the fixed housing 1 and may include a temperature sensor, a smoke sensor, and a controller. The temperature sensor can be a thermocouple-type temperature sensor, capable of rapidly responding to temperature changes. The smoke sensor can be a photoelectric smoke sensor, capable of effectively identifying smoke generated by a fire. Both the temperature sensor and the smoke sensor are electrically connected to the controller, transmitting the collected temperature and smoke signals to the controller. The controller 23 can use an STM32 series microcontroller, which has functions such as data processing, logic judgment, and control output. It can determine whether a fire has occurred based on temperature and smoke signals and issue corresponding control commands. The booster pump 3 is located on one side of the bottom inside the fixed housing 1. It can be a miniature centrifugal pump. Its inlet end is connected to an external water source through a pipe, and its outlet end is connected to the delivery control valve 4 through a pipe. It can pressurize the external water source to the pressure required for fire extinguishing and provide stable power to the sprinkler assembly 5. The booster pump 3 is electrically connected to the controller and is started or stopped by the controller. The delivery control valve 4 is located on the pipe between the booster pump 3 and the sprinkler assembly 5. It is electrically connected to the controller and is opened or closed by the controller. It is normally in the closed state. When it receives a trigger signal from the fire detection structure 2, it can quickly open to conduct water flow. The delivery control valve 4 can be an electric ball valve. The valve body of the delivery control valve 4 can be made of austenitic stainless steel, and the seals are made of oil-resistant rubber, which has good sealing performance and corrosion resistance. The water sprinkler assembly 5 may include a connecting pipe and a sprinkler head. The connecting pipe may be a DN20 fire-fighting galvanized pipe, with one end connected to the delivery control valve 4 and the other end connected to the sprinkler head. The sprinkler head may be an atomizing nozzle, with the flow coefficient selectable according to actual needs. The nozzle material is austenitic stainless steel, which has good corrosion resistance. The sprinkler head can convert pressurized water flow into atomized water mist to cover the fire area and extinguish the fire.

[0024] The pressure stabilizing structure 7 includes a pressure stabilizing tank 71, a flexible pressure stabilizing component 72, a water storage chamber 73, and a pressure stabilizing chamber 74. The pressure stabilizing tank 71 is located on the pipeline between the external water source and the booster pump 3. It can be a cylindrical sealed cavity and can be made of seamless steel pipe with a thickness of 5mm. It can temporarily store part of the water source. The flexible pressure stabilizing component 72 can be a water pressure resistant diaphragm, which is sealed and embedded inside the pressure stabilizing tank 71, dividing the inside of the pressure stabilizing tank 71 into two independent water storage chambers 73 and pressure stabilizing chambers 74. The water storage chamber 73 is located at the bottom of the pressure stabilizing tank 71. Its inlet is connected to the external water source pipeline, and its outlet is connected to the water inlet of the booster pump 3, so as to continuously supply water to the booster pump 3. The pressure stabilizing chamber 74 is located at the top of the pressure stabilizing tank 71. It is pre-filled with inert gas. The gas pressure acts on the flexible pressure stabilizing component 72 to balance the water pressure in the water storage chamber 73.

[0025] Through the pressure transmission of the flexible pressure stabilizer 72, when the external water source pressure rises suddenly, the water pressure in the water storage chamber 73 increases, pushing the flexible pressure stabilizer 72 to deform towards the pressure stabilizing chamber 74, compressing the gas in the pressure stabilizing chamber 74, and absorbing the energy of water pressure fluctuations; when the external water source pressure drops suddenly, the gas in the pressure stabilizing chamber 74 expands, pushing the flexible pressure stabilizer 72 to reset towards the water storage chamber 73, replenishing the pressure in the water storage chamber 73, avoiding malfunctions such as dry running and overpressure of the booster pump 3 due to fluctuations in inlet water pressure, ensuring that the water spray assembly 5 is always in a stable water pressure environment, and guaranteeing the atomization fire extinguishing effect.

[0026] In some embodiments, the pressure stabilizing structure 7 further includes a high-pressure gas cylinder 75 and a pressure maintaining valve 76. The high-pressure gas cylinder 75 stores high-pressure inert gases such as nitrogen, and its outlet is connected to the pressure stabilizing chamber 74 through a pipeline, which can replenish the pressure stabilizing chamber 74 with gas. The pressure maintaining valve 76 is connected in series on the pipeline between the high-pressure gas cylinder 75 and the pressure stabilizing chamber 74, and can maintain the pressure in the pressure stabilizing chamber 74 within a set range of 0.2-0.4 MPa. It can be an electrically controlled pressure maintaining valve (such as EDRV-05).

[0027] When a small leak occurs in the gas within the pressure stabilizing chamber 74 due to prolonged use, causing the pressure to fall below the set threshold, the pressure maintaining valve 76 automatically opens, allowing high-pressure gas from the high-pressure cylinder 75 to enter the pressure stabilizing chamber 74. The pressure maintaining valve 76 automatically closes once the pressure in the pressure stabilizing chamber 74 returns to the rated value. If the pressure in the pressure stabilizing chamber 74 exceeds the set upper limit due to abnormal conditions, the pressure relief structure of the pressure maintaining valve 76 can open to release excess gas, preventing overpressure damage to the pressure stabilizing tank 71. Through the synergistic effect of the high-pressure cylinder 75 and the pressure maintaining valve 76, the pressure in the pressure stabilizing chamber 74 can be maintained stably for a long period, extending the service life of the pressure stabilizing structure 7 and avoiding frequent manual gas replenishment operations.

[0028] In some embodiments, a filter structure 6 is also included. The filter structure 6 includes a first filter component and a second filter component. The first filter component is located on the pipeline between the pressure stabilizing tank 71 and the external water source, and can perform preliminary filtration on the water source entering the pressure stabilizing tank 71. The second filter component is located on the pipeline between the water spray assembly 5 and the delivery control valve 4, and can perform fine filtration on the water flow entering the water spray assembly 5.

[0029] Through a graded filtration design of coarse and fine filtration, the first filter component first intercepts large particulate impurities (such as silt and rust) in the water source, preventing impurities from entering the pressure tank 71 and depositing, thus affecting the movement of the flexible pressure stabilizer 72; the second filter component then filters out fine impurities (such as suspended particles and algae debris) in the water, preventing impurities from clogging the nozzle orifice of the water spray component 5, ensuring the atomization effect of the water mist, and at the same time preventing impurities from entering the booster pump 3 and the delivery control valve 4, reducing component wear and lowering the probability of failure.

[0030] In some embodiments, the first filter assembly includes a first connecting pipe 61 and a coarse filter element 62. The first connecting pipe 61 is connected in series on the pipeline between the booster pump 3 and the external water source, serving as a water flow channel and a filter carrier. The coarse filter element 62 is coaxially installed inside the first connecting pipe 61, and its filter pore size matches the size of common large particle impurities in the water source, enabling preliminary filtration of the water flowing to the booster pump 3.

[0031] When water flows from an external water source into the first connecting pipe 61, it must first pass through the coarse filter 62. Large particles of impurities in the water flow are intercepted on the filter surface of the coarse filter 62. The filtered clean water continues to flow to the pressure stabilizing tank 71, preventing large particles of impurities from entering subsequent components with the water flow and reducing the risk of wear on the impeller of the booster pump 3 and blockage of the pipeline in the pressure stabilizing tank 71.

[0032] In some embodiments, the first connecting pipe 61 includes a first connecting portion 611, a second connecting portion 612, and a filter portion 613. The first connecting portion 611 may be a threaded connector structure, with one end sealed to an external water source pipe and the other end connected to the filter portion 613. The second connecting portion 612 may be a threaded connector structure, with one end sealed to the inlet pipe of the booster pump 3 and the other end connected to the filter portion 613. The top of the filter portion 613 is connected to the first connecting portion 611, and the middle part is connected to the second connecting portion 612. A coarse filter element 62 is provided inside the filter portion 613. A detachable and sealed end cap is provided on the end of the filter portion 613 away from the first connecting portion 611 to facilitate the removal and cleaning of the coarse filter element 62.

[0033] Water flows through the first connection part 611 to the filter part 613, and after being filtered by the coarse filter element 62, it flows to the second connection part 612 and then to the booster pump 3, thereby achieving coarse filtration of the water.

[0034] In some embodiments, the coarse filter element 62 includes two fixing rings 621, a fixing frame 622, and a filter screen ring 623. The two fixing rings 621 are coaxially disposed at the connection point between the filter section 613 and the first connecting section 611, and on the inner wall of the filter section 613 away from the first connecting section 611, respectively. Grooves can be provided on the inner wall of the filter section 613 at the connection point with the first connecting section 611 and on the inner wall of the filter section 613 away from the first connecting section 611, allowing for insertion and engagement with the fixing rings 621 to axially position the fixing frame 622. The fixing frame 622 can be a cylindrical frame structure, coaxially disposed between the two fixing rings 621, and can be made of stainless steel. The filter screen ring 623 is coaxially disposed within the fixing frame 622. The filter screen ring 623 can be a stainless steel mesh ring structure, coaxially welded to the inner ring of the fixing frame 622, with a mesh diameter of 0.5-1mm, capable of intercepting large particulate impurities in the water source.

[0035] When water flows through the coarse filter element 62, the fixing frame 622 supports the filter screen ring 623 to prevent the filter screen from deforming due to the impact of the water flow; large particles of impurities in the water flow are intercepted by the filter screen ring 623, and the filtered water flows through the gap of the filter screen to the subsequent pipe. At the same time, the two fixing rings 621 restrict the displacement of the fixing frame 622 in the filter section 613 to ensure the stability of the filter position.

[0036] In some embodiments, the coarse filter element 62 further includes a plurality of guide vanes 624, which are arc-shaped sheet structures and are uniformly distributed in a ring on the inner wall of the filter screen ring 623. Their tilt direction is consistent with the water flow direction, which can guide the water flow to form a rotating flow state.

[0037] When water flows into the coarse filter element 62, it will rotate as it flows through the guide plate 624, forming a spiral water flow. Under the action of centrifugal force, the water flow throws impurities toward the inner wall of the filter screen ring 623, preventing impurities from accumulating in the central area of ​​the filter screen ring 623 and expanding the effective filtration area of ​​the filter screen ring 623. At the same time, the rotating water flow can wash away impurities on the surface of the filter screen, reduce impurity adhesion, and extend the cleaning cycle of the filter screen ring 623.

[0038] In some embodiments, the coarse filter element 62 further includes a rotating groove 625 and a plurality of balls 626. The rotating groove 625 may be an annular groove, coaxially formed on the outer wall of the fixed ring 621, and adapted to the balls 626 to form a sliding track. The plurality of balls 626 may be stainless steel spheres, uniformly embedded in the inner walls of both ends of the fixed frame 622 in an annular shape, and their diameter matches the groove width of the rotating groove 625, so that they can roll flexibly in the rotating groove 625.

[0039] Through the rolling engagement of the ball bearing 626 and the rotating groove 625, the fixed frame 622 can rotate relative to the fixed ring 621. When the water flow impacts the guide plate 624, it will drive the fixed frame 622 and the filter screen ring 623 to rotate synchronously, so that each area of ​​the filter screen ring 623 is evenly in contact with the water flow, reducing the local impact of impurities on the filter screen ring 623. At the same time, the rotating filter screen ring 623 can generate centrifugal force, which further gathers impurities at the end of the filter section 613 away from the first connecting part 611, avoiding the accumulation of impurities on the movement path of the water flow, thereby enhancing the impurity interception effect and improving the filtration efficiency.

[0040] In some embodiments, the second filtration assembly includes two fine filter elements 63, a switching valve 64, and a differential pressure sensor (not shown in the figure). The two fine filter elements 63 are arranged in parallel on the pipeline between the water spray assembly 5 and the delivery control valve 4. The fine filter elements 63 can be cylindrical precision filter cartridges with a filtration accuracy of 5-10 μm, which can filter out small impurities in the water. The switching valve 64 is located on the main pipeline between the delivery control valve 4 and the two fine filter elements 63. It can be an electric three-way valve and is electrically connected to the controller. Its two outlet ends are respectively connected to the water inlet ends of the two fine filter elements 63, which can switch the water flow through one of the fine filter elements 63. The two detection ends of the differential pressure sensor are respectively connected to the pipeline between the outlet end of the switching valve 64 and the outlet end of the fine filter element 63. Its signal output end is electrically connected to the control end of the switching valve 64, which can detect the pressure difference before and after the fine filter element 63 in real time.

[0041] When one of the fine filter elements 63 has been used for a long time, the accumulation of impurities will increase the filter element resistance. When the pressure difference detected by the differential pressure sensor exceeds the set threshold, a switching signal will be sent to the switching valve 64. The switching valve 64 will automatically switch the water flow channel so that the water flows through another spare fine filter element 63, ensuring that the water supply of the water spray assembly 5 is uninterrupted. When the device is not in operation, the operator can replace the clogged fine filter element 63, realize maintenance without stopping the machine, and improve the continuous availability of the device.

[0042] In some embodiments, an audible and visual alarm 8 is also included. The audible and visual alarm 8 is located on the top outer side of the fixed housing 1, and its signal receiving end is electrically connected to the signal output end of the fire detection structure 2. It can issue an alarm prompt when a fire signal is received.

[0043] When the fire detection structure 2 detects a fire in the protected area (temperature and smoke concentration exceeding the standard), it will simultaneously send a trigger signal to the audible and visual alarm 8. The audible and visual alarm 8 will immediately emit a continuous buzzing sound of more than 110dB, accompanied by a red flashing light. In noisy environments or under strong light conditions, it can quickly remind on-site personnel to evacuate, while indicating the location of the fire to firefighters, assisting subsequent firefighting operations, and reducing the risk of casualties and property damage.

[0044] The specific working principle is as follows: When an initial fire occurs in the protected area, the high temperature generated by the fire causes the temperature sensor to detect an ambient temperature that rises rapidly to above 68°C. Simultaneously, smoke particles enter the smoke sensor, causing the light scattering signal intensity output by the sensor to exceed 0.1 dB / m. Both types of sensors simultaneously transmit the threshold-exceeding signals to the controller. The controller uses a dual-signal and logic judgment; only when both the temperature and smoke signals exceed the threshold is the fire confirmed to be real. If only a single signal exceeds the threshold, the controller only issues a warning and does not initiate fire suppression actions.

[0045] After the controller confirms the fire, it outputs a 220V working voltage to the booster pump 3 to start the booster pump 3; it outputs a 24V drive voltage to the delivery control valve 4, causing the electric ball valve core to rotate 90° and open the water flow channel; it outputs a trigger signal to the audible and visual alarm 8 to start the alarm function; and it outputs a holding signal to the switching valve 64 of the second filter component to maintain the current conduction state of the fine filter element 63. If the subsequent pressure difference exceeds the standard, the switching will be triggered again.

[0046] After the booster pump 3 starts, its inlet end draws water from the water storage chamber 73 of the pressure stabilizing tank 71 through the pipeline, pressurizing the water flow to the rated pressure required for fire extinguishing, such as 0.3MPa. The pressurized water flow is then directed to the delivery control valve 4 through the outlet.

[0047] If the external water pressure suddenly increases, the water pressure in the storage chamber 73 will rise synchronously, pushing the flexible pressure stabilizer 72 to deform towards the pressure stabilizing chamber 74, compressing the inert gas in the pressure stabilizing chamber 74. The gas pressure will rise from 0.3MPa to 0.4MPa, absorbing the energy of the sudden increase in water pressure and preventing the high-pressure water flow from impacting the impeller of the booster pump 3 or the valve core of the delivery control valve 4. If the external water pressure suddenly drops, the water pressure in the storage chamber 73 will decrease, and the gas in the pressure stabilizing chamber 74 will expand, pushing the flexible pressure stabilizer 72 to reset towards the storage chamber 73, squeezing the water in the storage chamber 73, and supplementing the water flow pressure. This ensures that the water pressure at the inlet of the booster pump 3 is always maintained at 0.2-0.3MPa, preventing the booster pump 3 from running dry or cavitating due to insufficient inlet water pressure, and ensuring stable output water pressure.

[0048] If a small amount of gas leaks from the pressure regulating chamber 74 due to the deformation of the flexible pressure regulating component 72 during the pressure regulation process, the pressure maintaining valve 76 will open again when the pressure drops to 0.2MPa, and the high-pressure gas cylinder 75 will replenish nitrogen to the pressure regulating chamber 74 to maintain pressure balance and ensure that the water supply pressure of the water storage chamber 73 remains stable throughout the entire fire extinguishing process.

[0049] Before entering the pressure stabilizing tank 71, the external water source flows through the first connecting pipe 61 of the first filter assembly. The water flows into the filter section 613 from the first connecting part 611. When it flows through the coarse filter element 62, large particles of impurities such as mud, rust, and algae are intercepted by the filter screen ring 623. At this time, the water flow impacts the guide vanes 624 on the inner wall of the coarse filter element 62, pushing the guide vanes 624 to drive the fixed frame 622 to rotate. The fixed frame 622 drives the filter screen ring 623 to rotate synchronously, generating centrifugal force to throw impurities towards the inner wall of the filter section 613, preventing impurities from accumulating in the central area of ​​the filter screen. At the same time, the rotating filter screen can reduce impurity adhesion through the flushing action of the water flow. The filtered clean water flows into the water storage chamber 73 of the pressure stabilizing tank 71 from the second connecting part 612, ensuring that the water flowing into the booster pump 3 is free of large particles of impurities, and avoiding imperfections in the pump impeller and blockages in the pipes.

[0050] The water, pressurized by the booster pump 3, flows from the delivery control valve 4 into the switching valve 64 of the second filter assembly. The switching valve 64 directs the water flow to the currently active fine filter element 63. As the water flows through the fine filter element 63, fine impurities such as suspended particles, rust powder, and microbial debris are intercepted by the filter element, ensuring that the water flowing into the spray assembly 5 is free of minute impurities. The differential pressure sensor monitors the pressure difference before and after the fine filter element 63 in real time. If the filter element experiences increased resistance due to impurity accumulation, and the differential pressure rises to a set clogging threshold (e.g., 0.1 MPa), the differential pressure sensor sends a switching signal to the switching valve 64. The switching valve 64 rotates its valve core, disconnecting the currently clogged fine filter element 63 and activating the backup fine filter element 63, ensuring uninterrupted water flow and not affecting the fire extinguishing process.

[0051] Clean water is delivered to the spray head through the connecting pipe. When the water flows through the spiral channel under a pressure of 0.3MPa, it rotates at high speed. After being sprayed out of the nozzle outlet, it is dispersed into fine water mist particles due to centrifugal force and air resistance.

[0052] Atomized water mist has a large specific surface area, which can quickly absorb heat when in contact with flames, reducing the flame temperature below the ignition point of combustibles. At the same time, the water mist particles evaporate in the fire to form water vapor, diluting the oxygen concentration in the protected area and inhibiting the combustion reaction. In addition, the water mist can cover the surface of combustibles, forming a water film to isolate the air and prevent reignition.

[0053] During the firefighting process, the audible and visual alarm 8 works simultaneously to provide clear fire warnings to personnel on site and assist in evacuation and rescue: Upon receiving the trigger signal from the controller, the audible and visual alarm 8 immediately emits a continuous buzzing sound of over 110dB to alert personnel at a distance to the location of the fire. Simultaneously, a red flashing LED light flashes at a frequency of 1Hz to visually indicate the fire zone and guide personnel to evacuate in a direction away from the fire. If the fire is extinguished and the ambient temperature and smoke concentration drop below the threshold, the controller will delay for 30 seconds (to prevent reignition) before cutting off the trigger signal of the audible and visual alarm 8, and the alarm will stop.

[0054] After the fire is extinguished, the equipment needs to be maintained and reset to ensure it can be used normally next time.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A simple spray automatic fire extinguishing device, comprising a fixed shell (1); a fire detection structure (2) arranged in the fixed shell (1); a booster pump (3) arranged in the fixed shell (1) and connected with an external water source; a delivery control valve (4) connected with a water outlet of the booster pump (3); a water spraying assembly (5) connected with the delivery control valve (4); characterized in that further comprising a pressure stabilizing structure (7), which comprises a pressure stabilizing tank (71) arranged between the external water source and the booster pump (3); a flexible pressure stabilizing member (72) arranged in the pressure stabilizing tank (71) and separating the pressure stabilizing tank (71) into a water storage cavity (73) arranged at the bottom of the pressure stabilizing tank (71) and connected with the external water source and the booster pump (3), and a pressure stabilizing cavity (74) arranged at the top of the pressure stabilizing tank (71).

2. A simple spray automatic fire extinguishing device according to claim 1, characterized in that: The pressure stabilizing structure (7) further comprises a high-pressure gas cylinder (75) storing high-pressure gas and connected with the pressure stabilizing cavity (74); a pressure maintaining valve (76) arranged between the high-pressure gas cylinder (75) and the pressure stabilizing cavity (74).

3. A simple spray automatic fire extinguishing device according to claim 1, characterized in that: Further comprising a filtering structure (6) comprising a first filtering assembly arranged between the pressure stabilizing tank (71) and the external water source; a second filtering assembly arranged between the water spraying assembly (5) and the delivery control valve (4).

4. A simple spray automatic fire extinguishing device according to claim 3, characterized in that: The first filtering assembly comprises a first connecting pipe (61) arranged between the booster pump (3) and the external water source; a coarse filtering member (62) arranged in the first connecting pipe (61) and capable of achieving preliminary filtration of water flowing to the booster pump (3).

5. A simple spray automatic fire extinguishing device according to claim 4, characterized in that: The first connecting pipe (61) comprises a first connecting portion (611) connected with the external water source; a second connecting portion (612) connected with the booster pump (3); a filtering portion (613) connected with the first connecting portion (611) and the second connecting portion (612), and the coarse filtering member (62) is arranged in the filtering portion (613).

6. A simple spray automatic fire extinguishing device according to claim 5, characterized in that: The coarse filtering member (62) comprises two fixed rings (621) coaxially arranged at the connecting portion of the filtering portion (613) and the first connecting portion (611) and at the end of the filtering portion (613) away from the first connecting portion (611), respectively; a fixed frame (622) coaxially arranged between the two fixed rings (621); a filtering mesh ring (623) coaxially arranged in the fixed frame (622).

7. A simple spray automatic fire extinguishing device according to claim 6, characterized in that: The coarse filter (62) further comprises a plurality of guide vanes (624), which are annularly arranged on the inner wall of the filter screen ring (623).

8. A simple spray automatic fire extinguishing device according to claim 6, characterized in that: The coarse filter (62) further comprises a rotating groove (625), which is coaxially arranged on the outer wall of the fixed ring (621). A plurality of rolling balls (626) are annularly arranged on the inner wall of the fixed frame (622) and rotatably arranged in the rotating groove (625).

9. A simple spray automatic fire extinguishing device according to claim 3, characterized in that: The second filter assembly comprises two fine filters (63), which are arranged in parallel between the water spraying assembly (5) and the delivery control valve (4). A switching valve (64) is arranged between the delivery control valve (4) and the two fine filters (63). A differential pressure sensor is arranged between the switching valve (64) and the fine filter (63) and is electrically connected with the switching valve (64).

10. A simple spray automatic fire extinguishing device according to claim 1, characterized in that: An audible and visual alarm (8) is arranged on the fixed shell (1) and is electrically connected with the fire detection structure (2).

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