Automatic water spraying fire extinguishing system

Abstract

The utility model relates to an automatic water spraying fire extinguishing system which comprises a water storage unit, a conveying pipeline, a pressurizing unit, a control unit, a plurality of electric control spray head units, a temperature sensing unit and a valve, the control unit is electrically connected with the electric control spray head units, the pressurizing unit and the temperature sensing unit, the conveying pipeline is sequentially connected with the water storage unit, the valve, the pressurizing unit and the electric control spray head units, the temperature sensing unit is arranged close to the electric control spray heads, and the electric control spray head units are independently arranged and have a preset fire extinguishing coverage range; the distance between every two adjacent electric control spray head units is not larger than the fire extinguishing radius of the electric control spray head units, the coverage areas of the adjacent electric control spray head units are partially overlapped to form an overlapped area, and the control unit selectively opens or closes the corresponding electric control spray head units according to the temperature value of the overlapped area sensed by the temperature sensing unit. And in the overlapping area, the opening sequence of the adjacent electric control nozzles is controlled to ensure that the temperature in the sensed target protection area is controlled below fire, and rapid cooling and fire extinguishing are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fire extinguishing technology field especially automatic water spraying fire extinguishing system. BACKGROUND

[0002] The automatic water spraying fire extinguishing system is a kind of fire-fighting automatic water spraying fire extinguishing facility, which triggers the water spraying of nozzle and sends fire alarm signal simultaneously when fire occurs.

[0003] However, lithium battery centralized charging facilities and lithium battery energy storage equipment facilities catch fire frequently with electric bicycle charging shed as focus in recent years, and various provinces and cities have successively formulated the notification of strengthening electric bicycle whole chain and centralized charging facility construction work scheme, and vigorously promote the full coverage of residential area charging facility construction. However, due to overcharge, overvoltage, short circuit and environment, etc., the battery, especially the lithium battery, is prone to cause heat runaway phenomenon and lead to fire during frequent charging process in the charging cabinet, resulting in safety accidents. Due to high cost, these places rarely configure fire extinguishing system, or only configure ordinary dry powder fire extinguisher. The prior art is difficult to successfully extinguish fire or can only extinguish open fire once, and cannot continuously cool and inhibit fire from rekindling. Now there is an urgent need for a fire extinguishing system that can quickly extinguish fire, continuously cool, effectively prevent fire from rekindling and has low cost and safety. SUMMARY

[0004] To solve the above technical problems, the utility model discloses an automatic water spraying fire extinguishing system, which comprises a water storage unit, a conveying pipeline, a pressurizing unit, a damping unit, a control unit, an electrically controlled nozzle unit, a temperature sensing unit and a valve. The control unit is electrically connected with the electrically controlled nozzle unit, the pressurizing unit, the damping unit and the temperature sensing unit. The conveying pipeline is connected with the water storage unit, the valve, the pressurizing unit and the electrically controlled nozzle unit in sequence. The temperature sensing unit is arranged close to the electrically controlled nozzle. The number of the electrically controlled nozzle units is several, and the electrically controlled nozzle units are independently arranged. The electrically controlled nozzle units spray water towards the target protection area to form a circular fire extinguishing area. The distance L between adjacent electrically controlled nozzle units is less than or equal to the radius R of the fire extinguishing area of the electrically controlled nozzle unit. The overlapping fire extinguishing area is formed by the partial overlap of adjacent electrically controlled nozzle units in the target fire extinguishing area. The control unit can receive the temperature signal sent by the temperature sensing unit and selectively send the start signal to the electrically controlled nozzle units in the overlapping fire extinguishing area to form the fire extinguishing path.

[0005] Specifically, the electrically controlled nozzle units are arranged at equal intervals, and the connecting lines of the electrically controlled nozzle units are on the same straight line.

[0006] Specifically, a Y-shaped filter screen is arranged between the valve and the damping unit, the Y-shaped filter screen is arranged close to the water outlet of the valve, one end of the Y-shaped filter screen is detachably connected with the water outlet of the valve, and the other end is detachably connected with the damping unit.

[0007] Specifically, the pressurizing unit comprises a box body and an automatic booster pump, a water leakage pipeline is arranged at the bottom of the automatic booster pump, a water leakage hole is reserved at the corresponding position of the bottom of the box body, and the water leakage pipeline passes through the water leakage hole to discharge water in the water leakage pipeline to the outside of the box body.

[0008] Specifically, the damping unit is arranged as a flexible pipe with a double-layer structure, the inner layer of the flexible pipe is a woven mesh structure, and the outer layer of the flexible pipe is a corrugated structure formed along the axial direction of the pipe.

[0009] Specifically, the pressure sensing unit is arranged at the end of the conveying pipeline close to the electric control nozzle unit, the pressure sensing unit is electrically connected with the control unit, the water pressure output by the pressurizing unit is selectively adjusted by sensing the water pressure value in the conveying pipeline, and the water sprayed by the electric control nozzle unit at least covers the overlapping fire extinguishing area.

[0010] Specifically, the electric control nozzle unit is installed at the top of the center position of the target protection area.

[0011] Specifically, the surface of the electric control nozzle unit is coated with a fluorescent substance with a digital mark.

[0012] Specifically, the manual remote controller is provided with a key matched with each electric control nozzle unit, the key is signal-connected with the electric control nozzle unit to form a manual control circuit, the control unit is signal-connected with the electric control nozzle unit to form an automatic control circuit, and the priority level of the manual control circuit is higher than that of the automatic control circuit.

[0013] Advantageous effects

[0014] Compared with the prior art, the utility model discloses a plurality of electric control nozzle units are arranged on the fire extinguishing agent conveying pipeline, each electric control nozzle unit is connected with the control unit, and each electric control nozzle unit is independently arranged, the temperature value in the target protection area is sensed in time according to the temperature sensing unit, and the temperature signal is sent to the control unit, the spraying range of adjacent electric control nozzle units is partially overlapped, the control unit selects the start or shutdown of adjacent electric control nozzle units in order, the fire extinguishing system can quickly reduce the temperature, the fire in the target protection area is prevented from spreading to the surrounding environment, the performance of extinguishing fire is ensured, and the fire extinguishing efficiency of the fire extinguishing system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1This is a schematic diagram of the automatic sprinkler fire extinguishing system of this utility model;

[0016] Figure 2 This is a bottom view of the booster unit of this utility model.

[0017] Legend: 1. Water storage unit; 2. Valve; 21. Y-type filter screen; 3. Pressurization unit; 31. Water inlet; 32. Water outlet; 33. Booster pump; 34. Housing; 341. Drain hole; 342. Heat dissipation hole; 343. Fixing hole; 4. Delivery pipeline; 5. Control unit; 51. Control circuit; 52. Manual remote control; 6. Electric nozzle unit; 7. Pressure sensing unit; 8. Shock absorption unit; 9. Temperature sensing unit. Detailed Implementation

[0018] The present invention will be further described below with reference to embodiments, but is not limited to the contents of the specification.

[0019] This utility model relates to an automatic sprinkler fire extinguishing system, such as Figure 1 As shown, it includes a water storage unit 1, a delivery pipeline 4, a pressurization unit 3, a shock absorption unit 8, a control unit 5, an electronically controlled nozzle unit 6, a temperature sensing unit 9, and a valve 2. The control unit 5 is electrically connected to the electronically controlled nozzle unit 6, the pressurization unit 3, the shock absorption unit 8, and the temperature sensing unit 9 via a control circuit 51. The delivery pipeline 4 is sequentially connected to the water storage unit 1, the valve 2, the pressurization unit 3, and the electronically controlled nozzle unit 6. The temperature sensing unit 9 is paired with the electronically controlled nozzle unit 6 and is located close to the electronically controlled nozzle unit 6, and the number of temperature sensing units is the same as the number of electronically controlled nozzle units 6. The number of elements 6 is several, and the several electronically controlled sprinkler units 6 are set independently. The electronically controlled sprinkler units 6 spray water towards the target protection area to form a circular fire extinguishing area. The distance L between adjacent electronically controlled sprinkler units 6 is less than or equal to the radius R of the fire extinguishing area of ​​the electronically controlled sprinkler unit 6. The adjacent electronically controlled sprinkler units 6 partially overlap in the target fire extinguishing area to form an overlapping fire extinguishing area. According to the temperature value of the fire extinguishing area sensed by the temperature sensing unit 9, the control unit 5 selectively turns on or off multiple electronically controlled sprinkler units 6 covering the overlapping fire extinguishing area in the overlapping fire extinguishing area.

[0020] This fire extinguishing system can be used in various complex locations such as intelligent parking garages, electric vehicle charging sheds, charging piles, small distributed energy storage cabinets, small amusement facilities, and small-space UPS battery rooms. Its applications can be expanded to include independent electric lithium battery car charging piles, electric lithium battery bus charging piles, lithium battery energy storage warehouses, and fire extinguishing and cooling protection for liquid fires and electrical fires with a flash point higher than 60℃. The following is a detailed introduction using the fire extinguishing system applied to a charging shed as an example.

[0021] When installing the fire extinguishing system, the electric control nozzle unit 6 needs to be fixed on the top of the electric vehicle charging shed first, and then the conveying pipeline 4 is communicated with the electric control nozzle unit 6 and the bottom water storage unit 1, at this time, the water storage unit 1 can be a storage water tank or a tap water pipeline, in order to ensure the water output and water pressure of the electric control nozzle unit 6, the pressurizing unit 3 is installed near the water storage unit 1, because the weight of the pressurizing unit 3 is large, and the pressurizing unit 3 has high requirements for the placement space, it is necessary to find a suitable place for the pressurizing unit 3, and then install the pressurizing unit 3 in the suitable place; in addition, the electric control nozzle unit 6 is fixed at a set position of the charging shed and is aligned with the target protection area, and the position of the water storage unit 1 providing water for the charging shed is also fixed, during the installation of the fire extinguishing system, the horizontal distance difference and the height difference between the pressurizing unit 3 and the water storage unit 1 and the electric control nozzle unit 6 can be measured, and the length of the conveying pipeline 4 can be accurately determined, and then a plurality of straight conveying pipelines 4, the pressurizing unit 3 and the water storage unit 1 are connected through elbow connecting pipes, three-way pipes and connecting heads to form a complete fire extinguishing system passage.

[0022] In addition, the temperature sensing unit 9 is also installed on the top of the charging shed and is aligned with the target protection area, which can timely sense the temperature in the target protection area and timely transmit the temperature signal to the control unit 5, and the temperature threshold value is preset in the control unit 5, when the temperature value in the target protection area is greater than or equal to the temperature threshold value, the control unit 5 selectively opens the electric control nozzle unit 6 in the fire extinguishing overlap area, in order to improve the control, when the temperature signal exceeds the first temperature threshold value of the target protection area, the control unit 5 sends a start command to the pressurizing unit 3 and the electric control nozzle unit 6, at the same time, according to the real-time temperature data of the temperature sensing unit 9, when the temperature of the target protection area is greater than the second temperature threshold value, the control unit 5 controls the adjacent electric control nozzle unit 6 to start in order until there is no safety hazard in the target protection area, the temperature signal sensor feeds back the temperature signal to the control unit 5, and the control unit 5 sends a closing command to the electric control nozzle unit 6.

[0023] It should be pointed out that the first temperature threshold value is higher than the second temperature threshold value, the first temperature threshold value corresponds to the upper limit of the ignition point in the target protection area, at this time, the temperature in the target protection area cannot be extinguished by opening only one electric control nozzle unit, it is necessary to open the adjacent electric control nozzle unit to control the temperature in the target protection area below the ignition point, when the temperature in the target protection area is lower than the second temperature threshold value, the components in the target protection area continue to cool to the normal temperature state, which can avoid the occurrence of secondary fire in the target protection area, so as to eliminate the occurrence of safety hazards.

[0024] It should be noted that a plurality of monitoring devices are installed on the top of the charging shed, and the plurality of monitoring devices can at least cover the entire range of the charging shed, and the monitoring devices are connected with the control unit 5 through the control line 51. In the embodiment, the monitoring device is a camera, which can timely transmit the camera monitoring picture to the control unit 5. Correspondingly, the control terminal is signal connected with the electrically controlled nozzle unit 6 and the control unit 5, so as to be linked with the control terminal through wireless transmission.

[0025] The plurality of electrically controlled nozzle units 6 are arranged at equal intervals, and the wires of the plurality of nozzle units are on the same straight line.

[0026] In actual use, the position of the electrically controlled nozzle unit 6 corresponds to the position of the charging pile of the charging shed, and the electrically controlled nozzle unit 6 is aligned with the position of the battery to be charged. Since the wires of the charging piles are arranged at equal intervals and in a straight line, the wires of the electrically controlled nozzle unit 6 are also located on a straight line, and the adjacent two electrically controlled nozzle units 6 are arranged at equal intervals, so as to ensure that each target protection area corresponds to at least two electrically controlled nozzle units 6, thereby determining that the protection range in the entire charging shed corresponds to the electrically controlled nozzle, avoiding the existence of fire extinguishing dead angle, saving installation time, and the least conveying pipeline 4 can achieve the best fire extinguishing effect.

[0027] In addition, at least two nozzle units are aligned with a target protection area, which can prevent a large fire from causing a single electrically controlled nozzle unit 6 to fail to achieve the purpose of fire extinguishing, thereby ensuring that the temperature in the target protection area is lower than the second temperature threshold, reducing the security risk and improving the safety level.

[0028] In other embodiments, each electrically controlled nozzle unit 6 is connected to a sliding structure and communicates with the conveying pipeline 4, and the electrically controlled nozzle unit 6 and the sliding structure are connected with the control unit 5. At this time, a driving motor is also installed on the sliding structure, and the driving motor is fixed on the top of the charging shed. The driving motor is started by the control unit 5, so that the nozzle of the electrically controlled nozzle unit 6 driven by the sliding structure can reciprocate along the length direction of the conveying pipeline 4. Further, the sliding structure includes a sliding groove and a sliding rod. The sliding groove is fixed on the top of the charging shed and is arranged parallel to the conveying pipeline 4. The side wall of the sliding rod is connected with the nozzle in the electrically controlled nozzle unit 6. The sliding rod and the sliding groove can slide relative to each other along the extension direction of the conveying pipeline 4, forming the movement amount of the electrically controlled nozzle unit 6. At the same time, the electrically controlled nozzle unit 6 is arranged at the middle position of the sliding structure, so as to ensure that the adjacent electrically controlled nozzle units 6 can move into the protection area range according to the command of the control unit 5, improve the fire extinguishing efficiency, and eliminate the security risk.

[0029] Correspondingly, the spray head connected with the three-way pipe communicated with the conveying pipeline 4 is connected through an extensible hose, so that the stability of the connection between the conveying pipeline 4 and the electrically controlled spray head unit 6 can be ensured when the sliding structure drives the spray head to reciprocate, and the connection between the spray head and the conveying pipeline 4 during the reciprocating movement of the spray head is avoided to be disconnected, so that the normal operation of the fire extinguishing system can be ensured.

[0030] In addition, the control unit 5 can be a PLC integrated control module, which is installed in the control box 34 and is electrically connected with each electrically controlled spray head unit 6. The control module is pre-installed with a starting command program corresponding to the first temperature threshold and the second temperature threshold. When a fire or a fire about to occur in a vehicle in the charging shed, the control unit 5 of the fire extinguishing system can automatically control the electrically controlled spray head unit 6 to be opened according to the temperature value of the target protection area sensed by the temperature sensing signal, so that the fire extinguishing system can automatically operate.

[0031] In the embodiment, the pressurizing unit 3 is an automatic booster pump 33, which is installed near the protection equipment and provides driving power for the fire extinguishing system. The pump body is made of 304 stainless steel. The water inlet 31 and the water outlet 32 of the automatic booster pump 33 are respectively detachably connected with the conveying pipeline 4. The automatic booster pump 33 generates repeated vibrations during operation. The water inlet 31 and the water outlet 32 are integrally formed with the pressurizing unit 3, so that the water inlet 31 and the water outlet 32 vibrate synchronously with the automatic booster pump 33. A damping unit 8 is arranged between the water inlet 31 and the water outlet 32 and the conveying pipeline 4. The damping unit 8 has deformation amounts in axial and radial directions. During the vibration of the automatic booster pump 33, the damping unit 8 is frequently subjected to a certain pulling force. At this time, the damping unit 8 can eliminate or reduce the pulling force generated by the vibration, so that the vibration of the automatic booster pump 33 is prevented from being transmitted to the conveying pipeline 4, thereby avoiding damage to the connection of the conveying pipeline 4 and reducing the maintenance frequency, so that the fire extinguishing system can normally operate.

[0032] In order to ensure the pressure resistance of the conveying pipeline 4, the conveying pipeline 4 is made of a galvanized steel pipe, which has good rust resistance.

[0033] The electrically controlled spray head unit 6 is connected with the conveying pipeline 4 through a three-way joint. The electrically controlled spray head unit 6 includes a spray head, a temperature sensing glass bulb and an electric starter. The electric starter can be a resistance wire electric starter or an electric explosion electric starter. The electric starter is connected with the control unit 5 through a control line 51. The electric starter is connected with the temperature sensing glass bulb, and the temperature sensing glass bulb is installed on the spray head to block the spray opening of the spray head. After the fire extinguishing system stops operating, the valve 2 is closed, and part of water remains in the conveying pipeline. In order to prevent the remaining water in the conveying pipeline 4 from freezing in winter, a heat preservation layer can be arranged on the outer periphery of the conveying pipeline 4 to avoid that the fire extinguishing system cannot normally operate in winter.

[0034] Alternatively, a water leakage pipeline is arranged at the bottom of the automatic booster pump 33 and is installed in the box 34, for example, the box 34 is rectangular in shape, the positions of the water inlet 31 and the water outlet 32 of the automatic booster pump 33 do not interfere with each other, and the automatic booster pump 33 can be protected. Correspondingly, the water leakage hole 341 is reserved at the corresponding position of the bottom of the box 34, the water leakage pipeline passes through the water leakage hole 341 to discharge the water in the water leakage pipeline to the outside of the box 34, so that the automatic booster pump 33 can operate normally in winter. Figure 2

[0035] In addition, a plurality of heat dissipation holes 342 are arranged at the bottom of the box 34, corresponding to the position of the fan of the booster pump 33, the heat generated during the operation of the booster pump 33 can be transmitted to the outside, and the normal operation of the booster pump 33 is ensured; the fixing holes 343 are arranged at the four corners of the bottom of the box 34, respectively, and the box 34 can be fixed at a set position through the fixing holes 343, so that the booster pump is stably fixed in the box 34.

[0036] Correspondingly, the valve 2 of the utility model is preferably a stop valve, the water inlet end of the stop valve is communicated with the water storage unit 1, the water outlet end of the stop valve is connected with the conveying pipeline 4, and then is connected with the automatic booster pump 33 and the electric control nozzle unit 6, after installation, the stop valve can be in a normally open state, or when a fire occurs in the target protection area, the stop valve is manually opened, so that the water of the water storage unit 1 can flow to the pressurizing unit 3 through the conveying pipeline 4, and the water flow can be sprayed from the nozzle to extinguish the fire when extinguishing is needed.

[0037] In addition, the Y-shaped filter screen 21 is arranged between the valve 2 and the damping unit 8, the Y-shaped filter screen 21 is arranged close to the water outlet 32 of the valve 2, the Y-shaped filter screen 21 is made of brass or stainless steel, one end of the Y-shaped filter screen 21 is detachably connected with the water outlet 32 of the valve 2, and the other end is detachably connected with the damping unit 8, so that impurities or scale in the water storage unit 1 can be left on the surface of the filter structure, thereby avoiding that the scale or impurities enter the booster pump 33 to damage the blades, and meanwhile, the scale or impurities can also be avoided to gather at the bending part of the damping unit 8 and the conveying pipeline 4, so that the water pressure of the side wall of the damping unit 8 and the conveying pipeline 4 is increased, the flow of the water flow is reduced, the water amount sprayed by the electric control nozzle is reduced, and the extinguishing effect of the extinguishing system is reduced; in addition, when the damping unit 8 and the pressurizing unit 3 are damaged, they can be replaced or repaired in time, and the maintenance efficiency is improved.

[0038] ​The damping unit 8 can be a flexible pipe with a double-layer structure that can be bent. The inner layer of the flexible pipe is a stainless steel woven mesh structure, and the outer layer of the flexible pipe is a corrugated structure formed in the axial direction of the pipe. Through such a structure, the damping effect of the damping unit 8 can be ensured, and the flexible pipe can be bent to quickly connect the booster pump 33 to the delivery pipeline 4, thereby reducing the measurement accuracy and improving the installation efficiency.

[0039] In order to control the flow and pressure of the electrically controlled nozzle unit 6, a pressure sensing unit 7 is arranged on the delivery pipeline 4 at the top of the charging shed. Since the top delivery pipeline 4 forms a water passage, the pressure sensing unit 7 is arranged at the end of the delivery pipeline 4 and is electrically connected to the control unit 5. The pressure sensing unit 7 can timely feedback the pressure signal in the delivery pipeline 4 to the control unit 5. At this time, the control unit 5 is pre-set with a water flow pressure threshold value of the normal electrically controlled nozzle unit 6. When the pressure value is less than the water flow pressure threshold value, the pressure signal is sent to the control unit 5 in time. Since the water flow pressure is low, the spraying range of the electrically controlled nozzle unit 6 is reduced, thereby reducing the fire extinguishing effect. At this time, the control unit 5 sends a start signal to the booster pump 33. Correspondingly, until the output water pressure in the delivery pipeline 4 increases to reach the pressure threshold value, the booster pump 33 remains in this state. In this way, the water sprayed by the electrically controlled nozzle unit 6 can cover the target protection area and achieve the fire extinguishing effect.

[0040] The above-mentioned control mode is that the control unit 5 automatically starts the fire extinguishing system according to the pre-set temperature threshold value. The fire extinguishing system can also be controlled manually through a control terminal. The control terminal can push the fire extinguishing system start signal to the user through a 4G or 5G network. The control terminal can be a combination of one or more of a mobile phone, a computer, and a manual remote controller 52 with a key for the user of the fire extinguishing system, for example. The terminal can display specific images or specific abnormal information of the fire extinguishing system. The terminal can be used to timely start or stop the electrically controlled nozzle of the target protection area. In addition, the mobile terminal controlled fire extinguishing system and the control unit 5 automatically start the fire extinguishing system have different priorities in operation. For example, the priority of the terminal control line 51 is the highest. That is, when the terminal control line 51 is started, the fire extinguishing system controls the opening and closing of the corresponding nozzle unit in order according to the signal sent by the terminal. At this time, the automatic control line 51 connected to the control unit 5 stops running until the fire in the target protection area is quickly cooled below the ignition point, thereby achieving the effect of extinguishing the fire. The control terminal stops running.

[0041] And, the utility model still includes automatic detection fire alarm unit, automatic detection fire alarm unit is connected with control unit 5 electricity, when detecting that target protection area has the fire, automatic detection fire alarm unit can send the alarm sound in time, and send alarm signal to the control terminal of control unit 5, simultaneously, cut off the power supply of protected equipment and facilities, prevent the electric shock accident, ensure that user can start fire extinguishing system in time, avoid the problem when the fire occurs due to automatic fire extinguishing control circuit, still can control the opening and closing of fire extinguishing system through manual control circuit, reduce the security risk.

[0042] In order to ensure that user can accurately control and the opening and closing of the target protection area corresponding electric control shower head unit 6, the shower head surface of electric control shower head unit 6 is coated with fluorescent substance with digital identification, absorbs light in daytime, emits light at night, like this, fire extinguishing system still can be started through terminal accurately in the night and the corresponding key of the digital identification fast fire extinguishing or continuous cooling and temperature reduction, improve fire extinguishing efficiency, reduce the security risk, still can avoid material waste, save production cost.

[0043] Obviously, the above-mentioned embodiment of the utility model is only for clearly illustrating the utility model, and is not the limitation of the embodiment of the utility model. For ordinary skilled person in the art, on the basis of the above-mentioned explanation, other different forms of change or variation can be made. Here cannot be exhausted to all the embodiments. Any change or variation that belongs to the technical scheme of the utility model still falls within the protection scope of the utility model.

Claims

1. An automatic sprinkler system characterized in that: It includes water storage unit (1), delivery pipeline (4), pressurizing unit (3), damping unit (8), control unit (5), electric control nozzle unit (6), temperature sensing unit (9) and valve (2);The control unit (5) is electrically connected with electric control nozzle unit (6), pressurizing unit (3), damping unit (8) and temperature sensing unit (9), the delivery pipeline (4) is connected with water storage unit (1), valve (2), pressurizing unit (3), electric control nozzle unit (6) in turn, the temperature sensing unit (9) is matched with the electric control nozzle unit (6) and is close to electric control nozzle, the number of electric control nozzle unit (6) is several, and several electric control nozzle unit (6) are independently arranged, the electric control nozzle unit (6) sprays water towards target protection area and forms circular fire extinguishing area; The distance L between adjacent electric control nozzle unit (6) is less than or equal to the radius R of the fire extinguishing area of the electric control nozzle unit (6), and the adjacent electric control nozzle unit (6) partially overlaps in the target fire extinguishing area to form an overlapping fire extinguishing area, and the control unit (5) can receive the temperature signal sent by the temperature sensing unit (9) and selectively send the start signal to the electric control nozzle unit (6) in the overlapping fire extinguishing area to form a fire extinguishing path.

2. The automatic sprinkler system according to claim 1, wherein: Several nozzle units (6) are arranged at equal intervals, and the connection lines of several electric control nozzle units (6) are on the same straight line.

3. The automatic sprinkler system of claim 2, wherein: A Y-shaped filter screen (21) is arranged between the valve (2) and the damping unit (8), the Y-shaped filter screen (21) is arranged close to the water outlet of the valve (2), one end of the Y-shaped filter screen (21) is detachably connected with the water outlet of the valve, and the other end is detachably connected with the damping unit (8).

4. The automatic sprinkler system of claim 1, wherein: The pressurizing unit (3) comprises a box body (34) and an automatic booster pump (33), the bottom of the automatic booster pump (33) is provided with a water leakage pipeline, the bottom of the box body is provided with a water leakage hole in a corresponding position, and the water leakage pipeline passes through the water leakage hole to discharge water in the water leakage pipeline to the outside of the box body.

5. The automatic sprinkler system of claim 1, wherein: The damping unit (8) is a flexible pipe with a double-layer structure, the inner layer of the flexible pipe is a woven mesh structure, and the outer layer of the flexible pipe is a corrugated structure formed in the axial direction of the pipe.

6. The automatic sprinkler system of claim 1, wherein: It also includes a pressure sensing unit, the pressure sensing unit (7) is arranged at the end of the delivery pipeline (4) close to the electric control nozzle unit (6), the pressure sensing unit (7) is electrically connected with the control unit (5), the water pressure output by the pressurizing unit is selectively adjusted by sensing the water pressure value in the delivery pipeline (4), so that the water sprayed by the nozzle unit (6) covers at least the overlapping fire extinguishing area.

7. The automatic sprinkler system of claim 6, wherein: The electric control nozzle unit (6) is installed on the top of the center position of the target protection area.

8. The automatic sprinkler system of claim 1, wherein: The surface of the electric control nozzle unit (6) is coated with a fluorescent substance with digital identification.

9. The automatic sprinkler system of claim 1, wherein: It also comprises a manual remote controller (52) provided with buttons matched with each of the electrically controlled spray head units (6) and connected with the electrically controlled spray head units (6) respectively to form a manual control circuit, the control unit is connected with the electrically controlled spray head units (6) to form an automatic control circuit, and the priority level of the manual control circuit is higher than that of the automatic control circuit.

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