Automatic fire extinguishing system for kitchen

Abstract

The invention discloses an automatic fire extinguishing system for a kitchen, which relates to the technical field of fire-fighting equipment manufacturing and application and comprises a pipe network, an automatic valve, a fire extinguishing agent storage tank and a spray head. A filter, a valve and a flow switch are arranged on the pipe network, the filter, the valve and the flow switch are connected to the front end of an automatic valve of the pipe network in series, fire extinguishing agent storage tanks, spray heads, sealing adapters and protective caps are symmetrically installed on the two sides of the automatic valve, and a standard temperature sensing glass ball is arranged under a valve body of the automatic valve. A pipe network continuous water supply mode is adopted to solve the problem of fire extinguishing and reburning, and efficient fire extinguishing and continuous cooling are achieved. When the building floor is too high or the system is installed at the most unfavorable point of the pipe network, the pressure of the pipe network is too low, a supercharging device can be configured. The kitchen fire extinguishing device adopts an innovative technology of integrating the fire extinguishing agent storage tank and the spray head, is different from a traditional kitchen fire extinguishing device in which the fire extinguishing agent storage tank and the spray head are mounted at different positions, and is higher in fire extinguishing response speed and fire extinguishing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of fire-fighting equipment manufacturing and application, in particular to an automatic kitchen fire-extinguishing system. Background Art

[0002] The spontaneous combustion temperature of cooking oil is relatively high, generally between 350 and 380°C. Once the temperature gets out of control during cooking, a fire will occur. Once a fire occurs in cooking oil, it burns faster than other flammable liquids and is very likely to reignite. When the temperature of cooking oil exceeds 350°C, a chemical reaction will occur to generate flammable materials with a spontaneous combustion temperature of 65°C. Therefore, the fire hazard of cooking oil is greater.

[0003] Kitchens are high-risk locations for fires, where open flames are often used and a large amount of combustibles are stored. In commercial or important kitchens in hotels, restaurants, fast food chains, villas and other places, for the safety of life and property and to better meet the requirements of fire regulations, it is usually considered to install supporting firefighting equipment. However, existing firefighting equipment is manually operated, and the fire extinguishing efficiency is low for non-professional or unskilled operators. At the same time, improper injection of fire extinguishing agents may cause high-temperature burning grease in kitchen utensils to splash, personal safety cannot be guaranteed, and other items may be ignited. Even after the open fire in the kitchen is extinguished, it may re-ignite without continuous cooling. The fire extinguishing agent has a short shelf life, high maintenance costs, and may fail to extinguish the fire due to the failure of the fire extinguishing agent.

[0004] The existing automatic kitchen fire extinguishing system on the market is prefabricated. The fire extinguishing agent storage tank, drive device and injection system are located in two locations respectively, and are transported through a pipeline network. There is a response lag in the injection of the fire extinguishing agent, and the spraying medium is limited by the capacity of the storage tank. The system replaces connecting components, drivers or fire extinguishing agents, etc., which causes long kitchen downtime.

[0005] Therefore, developing a high-performance, easy-to-maintain kitchen automatic fire extinguishing system to continuously meet people's pursuit of a better life has very strong social benefits. Summary of the invention

[0006] The object of the present invention is to provide an automatic fire extinguishing system for a kitchen, so as to solve the problems raised in the above background technology that the existing automatic fire extinguishing system for a kitchen is prefabricated, the fire extinguishing agent storage tank, the driving device and the injection system are respectively located in two places, and are connected and transported through a pipeline network, there is a response lag in the injection of the fire extinguishing agent, the spraying medium is limited by the capacity of the storage tank, and the system replaces connecting components, drivers or fire extinguishing agents, etc., resulting in long kitchen downtime.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A kitchen automatic fire extinguishing system includes a pipe network, an automatic valve, a fire extinguishing agent storage tank and a nozzle. The pipe network is provided with a filter, a valve and a flow switch. The filter, valve and flow switch are connected in series to the front end of the automatic valve of the pipe network. The fire extinguishing agent storage tank, the nozzle, a sealing adapter and a protective cap are symmetrically installed on both sides of the automatic valve. A standard temperature-sensitive glass ball is arranged directly below the valve body. The left and right sides of the automatic valve are respectively connected to the inlet of the fire extinguishing agent storage tank through a first threaded connector to ensure that the outlet of the fire extinguishing agent storage tank is always facing downward, and a second threaded connector is connected. The nozzle of the nozzle is screwed downward to the outlet of the second threaded connector. The sealing adapter is installed on the thread of the nozzle, and the protective cap is sealed with the sealing adapter.

[0009] As a further solution of the present invention: the pipe network is a fire sprinkler pipe network or a tap water pipe network.

[0010] As a further solution of the present invention: the valve is a manual ball valve or an electric valve.

[0011] As a further solution of the present invention: when the building floor is too high or the system is installed at the most unfavorable point of the pipe network, a booster device can be configured if the pipe network pressure is too low.

[0012] As a further solution of the present invention: the flow switch can be converted into an electrical signal alarm to cut off the heating source.

[0013] As a further solution of the present invention: the automatic valve is started by a temperature-sensitive glass ball that breaks after reaching a nominal release temperature.

[0014] As a further solution of the present invention: the inlet of the fire extinguishing agent storage tank is fixed to the outlet of the first threaded connector with multiple screws, the outlet is fixed to the inlet of the second threaded connector with multiple screws, and a bursting disc is provided between the two components.

[0015] As a further solution of the present invention: the bursting disc has a plurality of screw holes.

[0016] As a further solution of the present invention: the protective caps are each provided with a metal wire made of stainless steel, and the other end of the metal wire is sleeved on the thread of the first threaded connector.

[0017] As a further solution of the present invention: the two metal wires have different lengths.

[0018] A fire extinguishing method for a kitchen automatic fire extinguishing system, the fire extinguishing method steps are as follows:

[0019] S1: When a fire occurs, the fire causes the temperature-sensitive glass ball to break. When a pressure-boosting device is provided, the water flow in step S(1) is further pressurized by the pressure-boosting device;

[0020] S2: The flow switch sends out a fire alarm signal, causing the stove heating source to be cut off;

[0021] S3: water flows further into the automatic valve;

[0022] S4: The water flow entering the automatic valve further causes the bursting disc at the inlet of the fire extinguishing agent storage tank to explode;

[0023] S5: The water flow entering the automatic valve further enters the fire extinguishing agent storage tank;

[0024] S6: The water flow entering the fire extinguishing agent tank further causes the bursting disc at the fire extinguishing agent tank outlet to explode;

[0025] S7: water flows further into the sprinkler;

[0026] S8: The water pressure further causes the protective cap to come off;

[0027] S9: The fire extinguishing agent acts on the fire scene to extinguish the fire.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The main body of the present invention adopts the innovative technology of integrating the fire extinguishing agent storage tank and the nozzle, which is different from the traditional kitchen fire extinguishing device that installs the fire extinguishing agent storage tank and the nozzle in different positions. The fire extinguishing response speed is faster and the fire extinguishing efficiency is higher;

[0030] 2. The present invention solves the problem that the traditional fire extinguishing device is unsafe and unreliable in manual operation. The present invention adopts automatic fire extinguishing technology and is equipped with an automatic temperature-sensing release valve;

[0031] 3. The present invention solves the problem of grease splashing caused by the spraying of fire extinguishing agent. It adopts low-pressure spraying, small spray impact, specially designed nozzle, and the atomization angle of the fire extinguishing agent can fully cover the protected object. The design of the atomization particle size can make the fire extinguishing agent highly efficient in extinguishing fire and the water mist highly efficient in cooling;

[0032] 4. The present invention solves the problem of the shelf life of fire extinguishing agent, adopts independent fire extinguishing agent storage tanks and independent storage tank bursting disc packaging, which ensures the safe storage of fire extinguishing agent, long validity period, and convenient maintenance and replacement;

[0033] 5. The present invention solves the problem of fire extinguishing and re-ignition. It adopts a pipe network to continuously supply water. The low-pressure pipe network can be equipped with a booster device, and the nozzle continuously sprays to achieve efficient fire extinguishing and continuous cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the kitchen automatic fire extinguishing system.

[0035] Figure 2 This is a partial structural diagram of the kitchen automatic fire extinguishing system.

[0036] Figure 3 This is a partial structural diagram of the kitchen automatic fire extinguishing system.

[0037] Figure 4 This is a schematic diagram of the kitchen automatic fire extinguishing system with automatic fire extinguishing function of the smoke exhaust duct.

[0038] Figure 5 This is a schematic diagram of the kitchen automatic fire extinguishing system with automatic fire extinguishing function of the smoke exhaust duct.

[0039] Figure 6 This is a flow chart of the kitchen automatic fire extinguishing system.

[0040] As shown in the figure: flow switch 1, pipe network 2, automatic valve 3, fire extinguishing agent storage tank 4, sealing adapter 5, nozzle 6, protective cap 7, metal wire 8, first threaded connector 9, second threaded connector 10, bursting disc 11, temperature sensitive glass ball 12, filter 13, valve 14. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-6 ;

[0043] Embodiment 1

[0044] A kitchen automatic fire extinguishing system comprises a filter 13, a valve 14, a flow switch 1, a pipe network 2, an automatic valve 3, a first threaded connector 9, a bursting disc 11, a fire extinguishing agent storage tank 4, a second threaded connector 10, a nozzle 6, a sealing adapter 5, a metal wire 8 and a protective cap 7.

[0045] The pipe network 2 is a fire sprinkler pipe network or a tap water pipe network, and a filter 13, a valve 14 and a flow switch 1 are arranged on the pipe network 2. When the building floor is too high or the system is installed at the most unfavorable point of the pipe network 2, the pressure of the pipe network 2 is too low and a booster device can be configured. The booster device is preferably a booster pump, and can also be other boosters. The filter 13, the valve 14, the flow switch 1 and the configurable booster device are connected in series at the front end of the automatic valve 3 of the pipe network 2.

[0046] The first threaded connector 9, bursting disc 11, fire extinguishing agent storage tank 4, second threaded connector 10, nozzle 6, sealing adapter 5 and protective cap 7 are symmetrically installed on both sides of the automatic valve 3. A standard temperature-sensitive glass ball 12 is provided just below the valve body of the automatic valve 3. The automatic valve 3 is screwed to the first threaded connector 9 on the left and right. The outlet end of the first threaded connector 9 is fixed to the inlet end of the fire extinguishing agent storage tank 4 with multiple screws. It is necessary to ensure that the outlet of the fire extinguishing agent storage tank 4 is always facing downward, and a bursting disc 11 is provided between the two components. The outlet of the fire extinguishing agent storage tank 4 is fixed to the second threaded connector 10 with multiple screws, and a bursting disc 11 is provided between the two components. The nozzle 6 is screwed to the outlet of the second threaded connector 10 with the nozzle facing downward. The sealing adapter 5 is installed on the thread of the nozzle 6, and the two protective caps 7 with metal wires 8 of different lengths are covered on the nozzle 6 and sealed with the sealing adapter 5. The other end of the metal wire 8 is sleeved on the thread of the first threaded connector 9;

[0047] The automatic valve 3 is used before the system is used. The internal thread interface on the upper surface of the automatic valve 3 needs to be screwed onto the vertically downward pipe network 2, and the valve of the pipe network 2 is always open. When the oil pan below the automatic valve 3 catches fire and the rated release temperature is reached around the temperature-sensitive glass ball 12, the ball will break, and the water pressure of the pipe network 2 will automatically push open the valve, and the fire extinguishing system will be automatically turned on; the fire extinguishing agent storage tank 4 and the nozzle 6 are used for when the automatic valve 3 is started, the water pressure from the pipe network 2 will break the bursting disc 11 at the inlet of the fire extinguishing agent storage tank 4, causing the internal pressure of the fire extinguishing agent storage tank 4 to break the bursting disc 11 at the tank outlet, and the fire extinguishing agent will be sprayed out from the nozzle 6, flushing off the protective cap 7, acting on the oil pan fire, and immediately extinguishing the fire. The nozzle 6 will continuously spray fine water mist to cool the oil pool and prevent re-ignition; the sealing adapter 5 and the protective cap 7 are used to protect the nozzle 6 from being damaged or dirty. The protective cap 7 completely covers the nozzle 6. The protective cap 7 maintains a seal with the sealing adapter 5 installed on the thread of the nozzle 6. Each protective cap 7 has a metal wire 8 made of stainless steel to prevent the protective cap 7 from falling into the oil pan, and the two metal wires 8 have different lengths to prevent the protective caps 7 from colliding with each other when they are dropped and hung; the threaded connector with screws and the bursting disc 11 are used to seal the fire extinguishing agent in the fire extinguishing agent storage tank 4 at the inlet and outlet of the tank, and the bursting disc 11 is easy to explode under low-pressure water flow.

[0048] The fire extinguishing method steps are as follows:

[0049] S1: When a fire occurs, the fire causes the temperature-sensitive glass ball 12 to break. When a pressure-boosting device is provided, the water flow in step S(1) is further pressurized by the pressure-boosting device;

[0050] S2: Flow switch 1 sends out a fire alarm signal, causing the stove heating source to be cut off;

[0051] S3: water flows further into automatic valve 3;

[0052] S4: The water flow entering the automatic valve 3 further causes the bursting disc 11 at the inlet of the fire extinguishing agent storage tank 4 to explode;

[0053] S5: The water flow entering the automatic valve 3 further enters the fire extinguishing agent storage tank 4;

[0054] S6: The water flow entering the fire extinguishing agent storage tank 4 further causes the bursting disc 11 at the outlet of the fire extinguishing agent storage tank 4 to explode;

[0055] S7: The water flow further enters the nozzle 6;

[0056] S8: The water pressure further causes the protective cap 7 to be detached;

[0057] S9: The fire extinguishing agent acts on the fire scene to extinguish the fire.

[0058] When considering the fire in the smoke exhaust duct of a kitchen fire, the following two further embodiments are proposed based on the above embodiment 1:

[0059] Embodiment 2

[0060] See also Figure 4 In an embodiment of the present invention, a kitchen automatic fire extinguishing system with an automatic fire extinguishing function of a smoke exhaust pipe is provided. On the basis of the above-mentioned embodiment 1, a solenoid valve, a prefabricated tank and a nozzle 6 are added. The solenoid valve realizes the standby and open states through the signal feedback of the flow switch 1. The prefabricated tanks are arranged in sequence on the spray pipe network of the smoke exhaust pipe at equal intervals. The pipe network 2 is arranged along the outer shell of the smoke exhaust hood. The nozzle 6 is threadedly connected to each prefabricated tank. The nozzle 6 extends into the interior of the smoke exhaust pipe and the nozzle 6 always faces the smoke exhaust direction at its location. Bursting discs 11 are provided at both ends of the prefabricated tank.

[0061] The fire extinguishing method steps are as follows:

[0062] S1: When a fire occurs, the fire causes the temperature-sensitive glass ball 12 to break. When a pressure-boosting device is provided, the water flow in step S(1) is further pressurized by the pressure-boosting device;

[0063] S2: Flow switch 1 sends out a fire alarm signal, which cuts off the stove heating source and drives the solenoid valve to open;

[0064] S3: The water flows into two paths and further enters the automatic valve 3 and the smoke exhaust pipe spray network;

[0065] S4: The water flow entering the automatic valve 3 further causes the bursting disc 11 at the inlet of the fire extinguishing agent storage tank 4 to explode;

[0066] S5: The water flow entering the automatic valve 3 further enters the fire extinguishing agent storage tank 4;

[0067] S6: The water flow entering the fire extinguishing agent storage tank 4 further causes the bursting disc 11 at the outlet of the fire extinguishing agent storage tank 4 to explode;

[0068] S7: The water flow further enters the nozzle 6;

[0069] S8: The water pressure further causes the protective cap 7 to be detached;

[0070] S9: The water flow entering the smoke exhaust pipe spray network further causes the bursting disc 11 at the inlet of the prefabricated tank to explode;

[0071] S10: The water flow entering the exhaust pipe spray network further enters the prefabricated tank;

[0072] S11: The water flow entering the prefabricated tank further causes the bursting disc 11 at the outlet of the prefabricated tank to explode;

[0073] S12: The water flow further enters the nozzle 6;

[0074] S13: The water pressure further causes the protective cap 7 to be detached;

[0075] S14: The fire extinguishing agent acts on the fire scene to extinguish the fire.

[0076] Steps S4-S8 and steps S9-S13 are performed simultaneously;

[0077] Embodiment 3

[0078] See also Figure 5 In an embodiment of the present invention, a kitchen automatic fire extinguishing system with an automatic fire extinguishing function of a smoke exhaust pipe is provided. A control cabinet and a matching fire extinguishing agent container assembly, a one-way valve, a solenoid valve and a nozzle 6 are added to the above-mentioned embodiment 1. The fire extinguishing agent container assembly is completely installed in the control cabinet. The control cabinet realizes the functions of standby and automatic start of the fire extinguishing system through the signal feedback of the flow switch 1. The one-way valve is connected to the outlet of the fire extinguishing agent container assembly. The solenoid valve is installed at the front end of the spray pipe network of the smoke exhaust pipe. The system remains closed when it is on standby. When the fire extinguishing agent is released, the control cabinet starts the solenoid valve to ensure continuous water supply to the pipe network. At this time, the one-way valve ensures that the water source does not invert the fire extinguishing agent bottle group. The pipe network is arranged along the outer shell of the smoke exhaust hood. The nozzles 6 are arranged on the spray pipe network of the smoke exhaust pipe at equal intervals. The nozzles 6 extend into the interior of the smoke exhaust pipe and the nozzles 6 always face the smoke exhaust direction of their positions.

[0079] The fire extinguishing method steps are as follows:

[0080] S1: When a fire occurs, the fire causes the temperature-sensitive glass ball 12 to break. When a pressure-boosting device is provided, the water flow in step S(1) is further pressurized by the pressure-boosting device;

[0081] S2: Flow switch 1 sends out a fire alarm signal, causing the control cabinet to drive the fire extinguishing system to start and cut off the stove heating source at the same time;

[0082] S3: water flows further into automatic valve 3;

[0083] S4: The water flow entering the automatic valve 3 further causes the bursting disc 11 at the inlet of the fire extinguishing agent storage tank 4 to explode;

[0084] S5: The water flow entering the automatic valve 3 further enters the fire extinguishing agent storage tank 4;

[0085] S6: The water flow entering the fire extinguishing agent storage tank 4 further causes the bursting disc 11 at the outlet of the fire extinguishing agent storage tank 4 to explode;

[0086] S7: The water flow further enters the nozzle 6;

[0087] S8: The water pressure further causes the protective cap 7 to be detached;

[0088] S9: The starter bottle further drives the fire extinguishing agent to fill the smoke exhaust pipe spray network;

[0089] S10: The fire extinguishing agent entering the smoke exhaust pipe spray network further enters the sprinkler head 6;

[0090] S11: The fire extinguishing agent further causes the protective cap 7 to be detached and sprayed;

[0091] S12: After the fire extinguishing agent is released, the control cabinet further opens the solenoid valve;

[0092] S13: The water flow of the spray pipe network 2 further enters the smoke exhaust pipe spray pipe network for continuous spraying;

[0093] S14: The fire extinguishing agent acts on the fire scene to extinguish the fire.

[0094] Steps S3-S8 and steps S9-S13 are performed simultaneously.

[0095] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A kitchen automatic fire extinguishing system, comprising a pipe network (2), an automatic valve (3), a fire extinguishing agent storage tank (4) and a nozzle (6). The characteristics are: The pipe network (2) is provided with a filter (13), a valve (14) and a flow switch (1), and the filter (13), the valve (14) and the flow switch (1) are connected in series to the front end of the automatic valve (3) of the pipe network (2). The fire extinguishing agent storage tank (4), the nozzle (6), the sealing adapter (5) and the protective cap (7) are symmetrically installed on both sides of the automatic valve (3), and a standard temperature-sensitive glass ball (12) is arranged directly below the valve body. The left and right sides of the automatic valve (3) are respectively connected to the inlet of the fire extinguishing agent storage tank (4) through a first threaded connector (9) to ensure that the outlet of the fire extinguishing agent storage tank (4) is always facing downwards, and connected to a second threaded connector (10), the nozzle of the nozzle (6) is screwed downwards to the outlet of the second threaded connector (10), the sealing adapter (5) is installed on the thread of the nozzle (6), and the protective cap (7) is sealed with the sealing adapter (5).

2. The automatic kitchen fire extinguishing system according to claim 1, characterized in that: The pipe network (2) is a fire sprinkler pipe network or a tap water pipe network.

3. The automatic kitchen fire extinguishing system according to claim 1, characterized in that: The valve (14) is a manual ball valve or an electric valve.

4. The automatic kitchen fire extinguishing system according to claim 1, characterized in that: The flow switch (1) can be converted into an electrical signal alarm to cut off the heating source.

5. The kitchen automatic fire extinguishing system according to claim 1, characterized in that: When the building floors are too high or the system is installed at the most unfavorable point in the pipe network, a booster device can be configured if the pipe network pressure is too low.

6. The automatic kitchen fire extinguishing system according to claim 1, characterized in that: The automatic valve (3) is activated by a temperature-sensitive glass ball (12) that breaks after reaching a nominal release temperature.

7. The automatic kitchen fire extinguishing system according to claim 1, characterized in that: The inlet of the fire extinguishing agent storage tank (4) and the outlet of the first threaded connector (9) are fixed with a plurality of screws, and the outlet and the inlet of the second threaded connector (10) are fixed with a plurality of screws, and bursting discs (11) are provided between the two components.

8. The automatic kitchen fire extinguishing system according to claim 7, characterized in that: The bursting disc (11) has a plurality of screw holes.

9. The automatic kitchen fire extinguishing system according to claim 1, characterized in that: The protective cap (7) is provided with a metal wire (8) made of stainless steel, the other end of the metal wire (8) is sleeved on the thread of the first threaded connector (9), and the two metal wires (8) are of different lengths.

10. The fire extinguishing method of the kitchen automatic fire extinguishing system according to claim 1, characterized in that: The fire extinguishing method steps are as follows: S1: When a fire occurs, the fire causes the temperature-sensitive glass ball (12) to break. When a pressure-boosting device is provided, the water flow in step S (1) is further pressurized by the pressure-boosting device; S2: The flow switch (1) sends out a fire alarm signal, causing the stove heating source to be cut off; S3: water flows further into the automatic valve (3); S4: The water flow entering the automatic valve (3) further causes the bursting disc (11) at the inlet of the fire extinguishing agent storage tank (4) to explode; S5: The water flow entering the automatic valve (3) further enters the fire extinguishing agent storage tank (4); S6: The water flow entering the fire extinguishing agent storage tank (4) further causes the bursting disc (11) at the outlet of the fire extinguishing agent storage tank (4) to explode; S7: the water flow further enters the nozzle (6); S8: The water pressure further causes the protective cap (7) to be detached; S9: The fire extinguishing agent acts on the fire scene to extinguish the fire.

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