Fire extinguishing system

Abstract

The present invention discloses a fire extinguishing system, which includes a fire extinguishing bottle, a detection bottle, a connection valve group and a spray pipe. One end of the spray pipe provided with a plugging member is placed at a position where a fire is likely to occur. Initially, the connection valve group is in the first conduction state, and the temperature of the plugging member is lower than the preset temperature and is in a plugging state to plug the spray pipe. When a fire occurs, the temperature of the plugging member rises to the preset temperature, and the plugging member enters a damaged state, and one end of the spray pipe far from the connection valve group is conducted, causing the detection gas to leak, and the pressure in the spray pipe drops. When the pressure drops to less than the preset pressure, the connection valve group enters the first conduction state, the fire extinguishing bottle is communicated with the spray pipe, and the fire extinguishing agent in the fire extinguishing bottle is ejected through the spray pipe to extinguish the fire. A plugging member is provided at one end of the spray pipe for plugging. The plugging member can be made of a fusible material or a temperature-sensitive material. The connection valve group is used to control the on-off of the fire extinguishing bottle and the spray pipe, and there will be no leakage of the fire extinguishing agent, ensuring the fire extinguishing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of fire-fighting equipment, and particularly to a fire extinguishing system. Background Art

[0002] The fire detection tube type heat-responsive self-activation fire extinguishing device is an innovative invention in the fire-fighting industry. As a simple, low-cost and highly reliable independent automatic fire extinguishing device, it requires no power supply, no dedicated fire detectors, no complex equipment and pipelines. Utilizing its own stored pressure, relying on a pressurized fire detection tube and a set of fire detection bottle groups, it can detect and extinguish the fire source, integrating fire detection and extinguishing, and extinguishing the fire hazard in the initial stage. It can not only greatly reduce the project cost, but also reduce the usage amount of fire extinguishing agent, reduce environmental pollution, and cause no harm to personnel. As a new type of fire detection and extinguishing device, it solves the fire prevention problem in spaces such as electrical equipment, control boxes, and switchboards that are prone to fire hazards and have plagued the fire-fighting industry for a long time. It has been widely used in domestic power plants, communications, radio and television, petrochemical, railways, oil storage depots, computer rooms and other places. However, after the fire detection tube is placed for a long time, it is prone to corrosion and aging, resulting in leakage of the fire extinguishing agent and affecting the fire extinguishing effect. Summary of the Invention

[0003] The purpose of the present invention is to provide a fire extinguishing system that can avoid leakage of the fire extinguishing agent and ensure the fire extinguishing effect.

[0004] A fire extinguishing system includes:

[0005] A fire extinguishing bottle storing a fire extinguishing agent and a pressurized gas;

[0006] A detection bottle storing a detection gas;

[0007] A connection valve group connected to both the fire extinguishing bottle and the detection bottle at the same time;

[0008] An injection tube with one end connected to the connection valve group; and

[0009] A plugging member provided at the other end of the injection tube away from the connection valve group to plug the injection tube;

[0010] Wherein, the connection valve group includes a first conduction state and a second conduction state, and the plugging member includes a plugging state and a damaged state;

[0011] When the pressure in the injection tube is greater than or equal to a preset pressure, the connection valve group is in the first conduction state to connect the detection bottle and the injection tube and cut off the connection between the injection tube and the fire extinguishing bottle;

[0012] When the pressure in the injection pipe is less than the preset pressure, the connection valve group enters the second conduction state to connect the fire extinguishing bottle and the injection pipe;

[0013] When the temperature of the plugging member is less than the preset temperature, the plugging member is in the plugging state to plug the injection pipe;

[0014] When the temperature of the plugging member is greater than or equal to the preset temperature, the plugging member is in the damaged state, and one end of the injection pipe away from the connection valve group is conducted.

[0015] By setting the above-mentioned fire extinguishing system, one end of the injection pipe provided with the plugging member is placed at a position where a fire is likely to occur. Initially, the connection valve group is in the first conduction state, and the temperature of the plugging member is less than the preset temperature and is in the plugging state to plug the injection pipe. When a fire occurs, the temperature of the plugging member rises to the preset temperature, the plugging member enters the damaged state, and one end of the injection pipe away from the connection valve group is conducted, causing the detection gas to leak and the pressure in the injection pipe to drop. When the pressure drops to less than the preset pressure, the connection valve group enters the first conduction state, the fire extinguishing bottle is connected to the injection pipe, and the fire extinguishing agent in the fire extinguishing bottle is sprayed out through the injection pipe to extinguish the fire. In this way, only a plugging member is arranged at one end of the injection pipe for plugging. The plugging member can be made of fusible material or temperature-sensitive material. Compared with the method of arranging the fire detection tube, the connection valve group in this fire extinguishing system controls the on-off of the fire extinguishing bottle and the injection pipe, and there will be no situation of fire extinguishing agent leakage, ensuring the fire extinguishing effect. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the principle of the fire extinguishing system provided by an embodiment of the present invention;

[0017] Figure 2 For Figure 1 It is a schematic diagram of the principle of a partial structure of the fire extinguishing system shown.

[0018] Reference Signs:

[0019] 100, fire extinguishing system; 200, battery box;

[0020] 11, fire extinguishing bottle; 12, detection bottle; 20, connection valve group; 21, first connecting pipe; 22, first control valve; 23, second connecting pipe; 24, second control valve; 25, third control valve; 26, fourth control valve; 27, fifth control valve; 28, connection joint; 29, third connecting pipe; 30, sixth control valve; 31, control pipe; 41, injection pipe; 42, delivery main pipe; 43, delivery branch pipe; 51, first pressure detector; 52, second pressure detector; 53, third pressure detector; 54, first pressure gauge; 55, second pressure gauge. Detailed Embodiments

[0021] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following provides a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0023] In addition, the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0024] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0027] As Figure 1 shown, a fire extinguishing system 100 provided by an embodiment of the present invention includes a fire extinguishing bottle 11, a detection bottle 12, a connection valve group 20, a spray pipe 41 and a plugging member (not shown in the figure).

[0028] The fire extinguishing bottle 11 stores a fire extinguishing agent and a pressurized gas, the detection bottle 12 stores a detection gas, the connection valve group 20 is connected to both the fire extinguishing bottle 11 and the detection bottle 12 at the same time, one end of the spray pipe 41 is connected to the connection valve group 20, and the plugging member is disposed at the other end of the spray pipe 41 away from the connection valve group 20 to plug the spray pipe 41.

[0029] Wherein, the connection valve group 20 includes a first conducting state and a second conducting state, and the plugging member includes a plugging state and a damaged state.

[0030] When the pressure in the spray pipe 41 is greater than or equal to a preset pressure, the connection valve group 20 is in the first conducting state to connect the detection bottle 12 and the spray pipe 41 and cut off the connection between the spray pipe 41 and the fire extinguishing bottle 11;

[0031] When the pressure in the spray pipe 41 is less than the preset pressure, the connection valve group 20 enters the second conducting state to connect the fire extinguishing bottle 11 and the spray pipe 41 and cut off the connection between the spray pipe 41 and the detection bottle 12;

[0032] When the temperature of the plugging member is less than the preset temperature, the plugging member is in the plugging state to plug the spray pipe 41;

[0033] When the temperature of the blocking member is greater than or equal to the preset temperature, the blocking member is in a damaged state, and the end of the injection pipe 41 away from the connection valve group 20 is connected.

[0034] By setting the above-mentioned fire extinguishing system, the end of the injection pipe 41 provided with the blocking member is placed at a position where fire is prone to occur. Initially, the connecting valve group 20 is in the first conduction state, and the temperature of the blocking member is lower than the preset temperature, and is in the blocking state to block the injection pipe 41. When a fire occurs, the temperature of the blocking member rises to the preset temperature, and the blocking member enters a damaged state. The end of the injection pipe 41 away from the connecting valve group 20 is connected, so that the detection gas leaks, and the pressure in the injection pipe 41 drops. When the pressure drops to less than the preset pressure, the connecting valve group 20 enters the first conduction state, and the fire extinguishing bottle 11 is connected to the injection pipe 41, and the fire extinguishing agent in the fire extinguishing bottle 11 is ejected through the injection pipe 41 to extinguish the fire. In this way, a blocking member is only set at one end of the injection pipe 41 for blocking, and the blocking member can be made of fusible material or temperature-sensitive material. Compared with the method of arranging a fire detection tube, the fire extinguishing system controls the connection and disconnection of the fire extinguishing bottle 11 and the injection pipe 41 by the connecting valve group 20, and there will be no leakage of the fire extinguishing agent, thereby ensuring the fire extinguishing effect.

[0035] It should be noted that the injection pipe 41 can be made of corrosion-resistant and long-life material to ensure its service life.

[0036] In addition, in this embodiment, the fire extinguishing agent is a fire extinguishing agent such as perfluorohexanone, heptafluoropropane, CO2, a coolant, and other media. When the fire extinguishing agent is CO2, the fire extinguishing agent and the pressurized gas are both CO2, and the detection gas is nitrogen. The pressurized gas can be the same as the detection gas. Of course, in other embodiments, the detection gas can be other compressed gases.

[0037] Furthermore, when the connecting valve group 20 enters the second conduction state, the connecting valve group 20 connects the fire extinguisher bottle 11 with the injection pipe 41, and cuts off the connection between the injection pipe 41 and the detection bottle 12 to avoid the fire extinguisher bottle 11 being connected with the detection bottle 12, and the fire extinguishing agent entering the detection bottle 12, resulting in waste of fire extinguishing agent.

[0038] In some embodiments, the connecting valve group 20 also includes a cut-off state. When the connecting valve group 20 is in the cut-off state, the connecting valve group 20 cuts off the connection between the injection pipe 41 and the fire extinguisher bottle 11 and the injection pipe 41 and the detection bottle 12 to prevent the detection gas and the fire extinguishing agent from entering the injection pipe 41.

[0039] Furthermore, when the blocking member is in a damaged state, the connecting valve group 20 can be switched back and forth between the second on state and the off state. In this way, when a fire occurs and the blocking member enters a damaged state, the connecting valve group 20 can be switched back and forth between the second on state and the off state to achieve multiple injections of the fire extinguishing agent, thereby achieving continuous suppression of the fire.

[0040] It should be noted that when the fire extinguishing system is applied to a lithium battery, the end of the spray pipe 41 provided with the plugging member extends into the battery box 200. When the battery undergoes thermal runaway, it will also cause the plugging member to enter a damaged state. Multiple injections of the fire extinguishing agent can continuously suppress and cool down the battery in thermal runaway, and discharge the continuously generated combustible gas, reducing the concentration of the combustible gas, thereby reducing the risk of explosion of the battery box 200.

[0041] In some embodiments, the connection valve group 20 further includes a first connecting pipe 21, a first control valve 22, and a second connecting pipe 23. The first connecting pipe 21 is connected between the fire extinguishing bottle 11 and the spray pipe 41. The first control valve 22 is disposed on the first connecting pipe 21 and is used to control the on-off of the first connecting pipe 21. The second connecting pipe 23 is connected between the detection bottle 12 and the spray pipe 41.

[0042] The first control valve 22 can be controlled to reciprocally switch between a conducting state and a cut-off state, so that the connection valve group 20 switches between a second conducting state and a cut-off state, realizing multiple injections of the fire extinguishing agent.

[0043] It should be noted that the first control valve 22 is disposed on the first connecting pipe 21. Actually, the first connecting pipe 21 is divided into two sections. One section is connected between the second control valve 24 and the first control valve 22, and the other section is connected between the first control valve 22 and the fourth control valve 26.

[0044] In some embodiments, the connection valve group 20 includes a second control valve 24 and a third control valve 25. The second control valve 24 is connected to the fire extinguishing bottle 11, the first connecting pipe 21 is connected to the second control valve 24, the third control valve 25 is connected to the detection bottle 12, and the second connecting pipe 23 is connected to the third control valve 25.

[0045] In some embodiments, the connection valve group 20 further includes a fourth control valve 26. The fourth control valve 26 is connected between the first connecting pipe 21 and the spray pipe 41, that is, one end of the fourth control valve 26 is connected to the end of the first connecting pipe 21 away from the second control valve 24, and the other end is connected to the spray pipe 41.

[0046] Furthermore, the connection valve group 20 further includes a fifth control valve 27. The fifth control valve 27 is connected between the second connecting pipe 23 and the spray pipe 41, that is, one end of the fifth control valve 27 is connected to the end of the second connecting pipe 23 away from the third control valve 25, and the other end is connected to the spray pipe 41.

[0047] It can be understood that the settings of the second control valve 24, the third control valve 25, the fourth control valve 26, and the fifth control valve 27 can facilitate the replacement of the first connecting pipe 21 and the second connecting pipe 23. Additionally, when the connection valve group 20 is in the second conduction state, the third control valve 25 and the fifth control valve 27 can be closed to cut off the connection between the injection pipe 41 and the detection bottle 12 while connecting the fire extinguisher bottle 11 and the injection pipe 41, preventing the fire extinguishing agent from entering the detection bottle 12.

[0048] Specifically, when the connection valve group 20 is in the second conduction state, both the second control valve 24 and the fourth control valve 26 are open, and the first control valve 22 controls the first connecting pipe 21 to be in a conduction state or a cut-off state; when the connection valve group 20 is in the first conduction state or the cut-off state, the first control valve 22 controls the first connecting pipe 21 to be in a cut-off state.

[0049] In some embodiments, the connection valve group 20 further includes a connection joint 28, and the connection joint 28 is connected between the fourth control valve 26, the fifth control valve 27, and the injection pipe 41. Specifically, the connection joint 28 is a tee joint.

[0050] In some embodiments, the connection valve group 20 further includes a third connecting pipe 29, a sixth control valve 30, and a control pipe 31. The third connecting pipe 29 is connected between the fire extinguisher bottle 11 and the injection pipe 41. The sixth control valve 30 is disposed on the third connecting pipe 29 for controlling the on-off of the third connecting pipe 29. The control pipe 31 is connected between the second connecting pipe 23 and the sixth control valve 30.

[0051] When the pressure in the second connecting pipe 23 is greater than or equal to the preset pressure, the sixth control valve 30 closes, thereby preventing the fire extinguishing agent from entering the injection pipe 41; when the pressure in the second connecting pipe 23 is less than the preset pressure, the sixth control valve 30 opens, allowing the fire extinguishing agent to enter the injection pipe 41.

[0052] It should be noted that the first control valve 22 is electrically controlled. The second control valve 24, the third control valve 25, the fourth control valve 26, and the fifth control valve 27 can be electric, manual, or pneumatic. Generally, the second control valve 24 and the fourth control valve 26 are in an open state, and the sixth control valve 30 is pneumatic.

[0053] In addition, the pressure differences in the injection pipe 41, the second connecting pipe 23, and the detection bottle 12 when the detection gas flows out are not considered here, and it is defaulted that the pressures in the injection pipe 41, the second connecting pipe 23, and the detection bottle 12 are the same. Therefore, the sixth control valve 30 also opens when the pressure in the second connecting pipe 23 is less than the preset pressure.

[0054] Specifically, generally, under normal circumstances, the second control valve 24, the third control valve 25, the fourth control valve 26, and the fifth control valve 27 are all in the open state, while the first control valve 22 and the sixth control valve 30 are in the closed state. Therefore, in the event of a power outage, the second control valve 24, the third control valve 25, the fourth control valve 26, and the fifth control valve 27 will open, and the first control valve 22 and the sixth control valve 30 will remain in the closed state.

[0055] In this way, when a fire breaks out during a power outage, the pressures in the spray pipe 41, the second connecting pipe 23, and the detection bottle 12 will all decrease. When the pressure drops below the preset pressure, the first control valve 22 will not act, but the sixth control valve 30 will open, and the fire extinguishing agent can enter the spray pipe 41 through the third connecting pipe 29 and be ejected to ensure that the fire extinguishing agent is ejected to extinguish the fire in the event of a power outage.

[0056] In some embodiments, the fire extinguishing system further includes a first pressure detector 51 and a controller. The first pressure detector 51 is disposed on the spray pipe 41 for detecting the pressure of the spray pipe 41. The controller is connected to the first pressure detector 51 and the connection valve group 20 for controlling the connection valve group 20 to switch from the first conduction state to the second conduction state according to the detection result of the first pressure detector 51.

[0057] That is to say, initially, the connection valve group 20 is in the first conduction state, the spray pipe 41 is filled with the detection gas, and its pressure is greater than or equal to the preset pressure. When a fire breaks out and the plugging member enters the damaged state, the spray pipe 41 communicates with the outside, the gas in the spray pipe 41 leaks, and the pressure in the spray pipe 41 decreases. When the pressure drops below the preset pressure, the controller controls the connection valve group 20 to enter the second conduction state.

[0058] In practical applications, the controller is also connected to the first control valve 22. When the second control valve 24, the third control valve 25, the fourth control valve 26, and the fifth control valve 27 are electrically operated, they can also be connected to the controller. When the connection valve group 20 enters the second conduction state, the controller can control the third control valve 25 and the fifth control valve 27 to close, thereby preventing the fire extinguishing agent from entering the detection bottle 12.

[0059] In some embodiments, the fire extinguishing system further includes an alarm. The alarm is connected to the controller, and the controller also controls the alarm to act according to the detection result of the first pressure detector 51, that is, when a fire breaks out and the pressure in the spray pipe 41 drops below the preset pressure, the controller controls the alarm to act, thereby notifying the staff to extinguish the fire.

[0060] Specifically, the alarm is an audible and visual alarm.

[0061] In some embodiments, the fire extinguishing system further includes a second pressure detector 52 disposed in the fire extinguishing bottle 11 for detecting the pressure inside the fire extinguishing bottle 11, so as to facilitate the staff to obtain information when the pressure inside the fire extinguishing bottle 11 is relatively low, and then replenish the fire extinguishing agent and pressurized gas into the fire extinguishing bottle 11.

[0062] It can be understood that the second pressure detector 52 is connected to the controller, and the controller can also control the alarm to act according to the detection result of the second pressure detector 52 to notify the staff to replenish the fire extinguishing agent.

[0063] In practical applications, the second pressure detector 52 is disposed on the second control valve 24.

[0064] In some embodiments, the fire extinguishing system further includes a third pressure detector 53 disposed in the detection bottle 12 for detecting the pressure inside the detection bottle 12, so as to detect the pressure inside the detection bottle 12 after the third control valve 25 and the fifth control valve 27 are closed.

[0065] In some embodiments, the first pressure detector 51, the second pressure detector 52, and the third pressure detector 53 are all pressure sensors.

[0066] In some embodiments, the fire extinguishing system further includes a first pressure gauge 54 and a second pressure gauge 55. The first pressure gauge 54 is disposed on the fire extinguishing bottle 11 for visually displaying the pressure inside the fire extinguishing bottle 11, and the second pressure gauge 55 is disposed on the detection bottle 12 for visually displaying the pressure inside the fire extinguishing bottle 11, so as to obtain the pressure inside the fire extinguishing bottle 11 and the detection bottle 12 in the event of a power outage.

[0067] In some embodiments, there are multiple jet pipes 41, and there are multiple blocking members. One end of each jet pipe 41 is connected to the connection valve group 20, and each blocking member is disposed at the other end of the corresponding jet pipe 41 away from the connection valve group 20.

[0068] In this way, multiple fire-prone locations can be monitored. Moreover, when fires occur at multiple locations, the blocking members at the corresponding locations enter a damaged state, while the blocking members at other normal locations are in a blocking state, and the fire extinguishing agent will only be ejected from the corresponding jet pipe 41, achieving the effect of precise fire extinguishing.

[0069] In some embodiments, the fire extinguishing system further includes a main delivery pipe 42 and delivery branch pipes 43. One end of the main delivery pipe 42 is connected to the connection valve group 20, one end of each delivery branch pipe 43 is connected to the main delivery pipe 42, and multiple jet pipes 41 are connected to each delivery branch pipe 43.

[0070] It can be understood that, as Figure 1As shown, when the fire extinguishing system is applied to lithium batteries, each delivery branch pipe 43 can correspond to a partition, and each injection pipe 41 corresponds to a battery box 200. Thus, when a battery in a certain battery box 200 undergoes thermal runaway, the fire extinguishing agent can be ejected from the injection pipe 41 corresponding to the battery box 200 to achieve precise suppression and fire extinguishing.

[0071] In some embodiments, the fire extinguishing system further includes a plurality of nozzles. One end of each injection pipe 41 away from the delivery branch pipe 43 is connected to a nozzle, and a plugging member is used to plug the nozzle.

[0072] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0073] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A fire extinguishing system, characterized in that, include: Fire extinguisher bottle, storing fire extinguishing agent and pressurized gas; A detection bottle storing a detection gas; Connect the valve group, and connect it to the fire extinguisher bottle and the detection bottle at the same time; An injection pipe, one end of which is connected to the connecting valve group; A blocking member is arranged at the other end of the injection pipe away from the connecting valve group; and A nozzle, the nozzle is connected to one end of the spray pipe, and the blocking member is used to block the nozzle; Wherein, the connecting valve group includes a first connecting pipe, a first control valve and a second connecting pipe, the first connecting pipe is connected between the fire extinguishing bottle and the injection pipe, the first control valve is arranged on the first connecting pipe, and is used to control the on-off of the first connecting pipe, and the second connecting pipe is connected between the detection bottle and the injection pipe; The connecting valve group includes a first conducting state and a second conducting state, and the blocking member includes a blocking state and a damaged state; When the pressure in the spray pipe is greater than or equal to the preset pressure, the connecting valve group is in the first conducting state to connect the detection bottle with the spray pipe and cut off the connection between the spray pipe and the fire extinguishing bottle; When the pressure in the spray pipe is lower than the preset pressure, the connecting valve group enters the second conducting state to connect the fire extinguisher bottle with the spray pipe; When the temperature of the blocking member is lower than a preset temperature, the blocking member is in the blocking state to block the injection pipe; When the temperature of the blocking member is greater than or equal to the preset temperature, the blocking member is in the damaged state, and the end of the injection pipe away from the connecting valve group is connected.

2. The fire extinguishing system according to claim 1, characterized in that, The connecting valve group also includes a second control valve and a third control valve, the second control valve is connected to the fire extinguisher bottle, the first connecting pipe is connected to the second control valve, the third control valve is connected to the detection bottle, and the second connecting pipe is connected to the third control valve.

3. The fire extinguishing system according to claim 2, characterized in that, The connecting valve group further includes a fourth control valve and a fifth control valve. The fourth control valve is connected between the first connecting pipe and the injection pipe, and the fifth control valve is connected between the second connecting pipe and the injection pipe.

4. The fire extinguishing system according to claim 1, characterized in that, The connecting valve group further includes a third connecting pipe, a sixth control valve and a control pipe, wherein the third connecting pipe is connected between the fire extinguisher bottle and the spray pipe, the sixth control valve is arranged on the third connecting pipe and is used to control the on-off of the first connecting pipe, and the control pipe is connected between the second connecting pipe and the sixth control valve; When the pressure in the second connecting pipe is greater than or equal to a preset pressure, the sixth control valve is closed; when the pressure in the second connecting pipe is less than the preset pressure, the sixth control valve is opened.

5. The fire extinguishing system according to any one of claims 1 - 4, characterized in that, The connecting valve group also includes a cut-off state; When the connecting valve group is in the cut-off state, the connecting valve group cuts off the connection between the injection pipe and the fire extinguishing bottle and between the injection pipe and the detection bottle; When the blocking member is in the damaged state, the connecting valve group can be switched back and forth between the second conducting state and the blocking state.

6. The fire extinguishing system according to any one of claims 1 - 4, characterized in that, The fire extinguishing system further includes a first pressure detector and a controller. The first pressure detector is disposed on the injection pipe for detecting the pressure of the injection pipe. The controller is connected to the first pressure detector and the connection valve group, and is configured to control the connection valve group to switch from the first conducting state to the second conducting state according to the detection result of the first pressure detector.

7. The fire extinguishing system according to claim 6, characterized in that, The fire extinguishing system further includes an alarm. The alarm is connected to the controller, and the controller is further configured to control the alarm to act according to the detection result of the first pressure detector.

8. The fire extinguishing system according to any one of claims 1 - 4, characterized in that, The fire extinguishing system further includes a second pressure detector. The second pressure detector is disposed on the fire extinguisher bottle for detecting the pressure inside the fire extinguisher bottle.

9. The fire extinguishing system according to any one of claims 1 - 4, characterized in that, There are multiple injection pipes, and there are multiple blocking members. One end of each injection pipe communicates with the connection valve group, and each blocking member is disposed at the other end of the corresponding injection pipe away from the connection valve group.

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