Automatic fire extinguishing device and power distribution cabinet

Abstract

The present invention relates to an automatic fire extinguishing device and a power distribution cabinet, belonging to the technical field of fire-fighting equipment for power distribution cabinets. By connecting the open end of the first fire extinguishing agent storage to the main line, a first solenoid valve is connected to the main line. When the ambient temperature is greater than the first temperature threshold, the first temperature control switch controls the first solenoid valve to open through the first relay, and the main line sprays the fire extinguishing agent outward; when the ambient temperature is less than the second temperature threshold, the second temperature control switch controls the first solenoid valve to close through the first relay, and the main line stops spraying the fire extinguishing agent outward. Therefore, the automatic fire extinguishing device and the power distribution cabinet provided by the present invention can automatically respond to a fire occurring in the power distribution cabinet and perform fire extinguishing treatment, thereby enhancing the fire prevention and extinguishing effect of the power distribution cabinet and the safety of use of the power distribution cabinet.

Description

Technical Field

[0001] The present invention relates to an automatic fire extinguishing device and a power distribution cabinet, belonging to the technical field of fire-fighting equipment for power distribution cabinets. Background Art

[0002] Fire extinguishers are usually equipped in power distribution cabinets. When a fire breaks out, fire extinguishing treatment is carried out using the fire extinguishers.

[0003] The commonly used fire extinguishers at present are hand-held fire extinguishers. The hand-held fire extinguishers include components such as a cylinder body, a valve, a spray hose, etc. The cylinder body stores fire extinguishing agents such as carbon dioxide or dry powder. When a fire breaks out, a person needs to hold the fire extinguisher by hand, open the valve of the fire extinguisher, and then hold the nozzle part at the front end of the spray hose, and use the ejected fire extinguishing agent to extinguish the fire.

[0004] However, the hand-held fire extinguisher cannot automatically respond to the occurring fire and carry out fire extinguishing treatment. When using the hand-held fire extinguisher, it depends on people to discover the fire in time. If people do not discover the fire in time, it will cause the fire to spread and expand, resulting in heavy losses. Summary of the Invention

[0005] Aiming at the above defects in the prior art, the present invention provides an automatic fire extinguishing device and a power distribution cabinet.

[0006] The automatic fire extinguishing device provided by the present invention includes a first fire extinguishing agent storage, a first solenoid valve, a first relay, as well as a first temperature control switch and a second temperature control switch; the first fire extinguishing agent storage stores a fire extinguishing agent, and an opening end of the first fire extinguishing agent storage is connected with a main line; the first solenoid valve is connected to the main line, and the first solenoid valve is a normally closed solenoid valve; the first relay is electrically connected to the first solenoid valve; the first temperature control switch and the second temperature control switch are respectively electrically connected to the first relay; the first temperature control switch is set with a first temperature threshold, the second temperature control switch is set with a second temperature threshold, and the second temperature threshold is less than the first temperature threshold; when the ambient temperature is greater than the first temperature threshold, the first temperature control switch controls the first solenoid valve to open through the first relay, and the main line sprays out the fire extinguishing agent; when the ambient temperature is less than the second temperature threshold, the second temperature control switch controls the first solenoid valve to close through the first relay, and the main line stops spraying out the fire extinguishing agent; the first temperature control switch, the second temperature control switch, and the outlet end of the main line are arranged in the power distribution cabinet.

[0007] As one of the optional technical solutions of the present invention, the automatic fire extinguishing device provided by the present invention further includes a second fire extinguishing agent storage, a second solenoid valve, a second relay, and a first pressure switch; the second fire extinguishing agent storage is connected to the main line through the second solenoid valve, and the second solenoid valve is a normally closed solenoid valve; the first pressure switch is connected to the main line, the first pressure switch is used to monitor the pressure of the main line, and the first pressure switch is provided with a first pressure threshold; the first pressure switch is electrically connected to the second relay, and the second relay is electrically connected to the second solenoid valve; when the pressure value of the main line is lower than the first pressure threshold, the first pressure switch controls the second solenoid valve to open through the second relay, and the fire extinguishing agent in the second fire extinguishing agent storage enters the main line.

[0008] As one of the optional technical solutions of the present invention, the automatic fire extinguishing device provided by the present invention further includes a circuit bus, and the circuit bus includes a neutral line and a live line; the first end of the second solenoid valve is electrically connected to the neutral line, and the second end of the second solenoid valve is electrically connected to the live line through the second relay; the first end of the first pressure switch is electrically connected to the live line, the second end of the first pressure switch is electrically connected to the first signal input end of the second relay, and the second signal input end of the second relay is electrically connected to the neutral line.

[0009] As one of the optional technical solutions of the present invention, the first end of the first solenoid valve is electrically connected to the neutral line, and the second end of the first solenoid valve is electrically connected to the live line through the first relay; the first ends of the first temperature control switch and the second temperature control switch are respectively electrically connected to the live line, the second end of the first temperature control switch is electrically connected to the first signal input end of the first relay, the second end of the second temperature control switch is electrically connected to the second signal input end of the first relay, and the third signal input end of the first relay is electrically connected to the neutral line.

[0010] As one of the optional technical solutions of the present invention, the automatic fire extinguishing device provided by the present invention further includes a third relay and an alarm; the first end of the alarm is electrically connected to the neutral line, and the second end of the alarm is electrically connected to the power output end of the first relay through the third relay; the first signal input end of the third relay is electrically connected to the neutral line; the second signal input end of the third relay is electrically connected to the live line through a third normally open button.

[0011] As one of the optional technical solutions of the present invention, the automatic fire extinguishing device provided by the present invention further includes a first normally open button and a second normally open button; the first normally open button and the first temperature control switch are in parallel, and the second normally open button and the second temperature control switch are in parallel.

[0012] As one of the optional technical solutions of the present invention, the automatic fire extinguishing device provided by the present invention further includes a first circuit breaker and a second circuit breaker; the first circuit breaker is arranged on the live wire, and the first pressure switch and the second relay are respectively electrically connected to the live wire through the first circuit breaker; the power input end of the first relay, the first end of the first temperature control switch and the first end of the second temperature control switch are respectively electrically connected to the live wire through the second circuit breaker.

[0013] As one of the optional technical solutions of the present invention, the automatic fire extinguishing device provided by the present invention further includes a safety valve, a first three-way control valve and a leakage circuit breaker; the safety valve is connected to the main line; the first end of the first three-way control valve is connected to the main line, the second end of the first three-way control valve is connected to a first pressure switch, and the third end of the first three-way control valve is left vacant; the neutral wire and the live wire are electrically connected to the leakage circuit breaker.

[0014] As one of the optional technical solutions of the present invention, the outlet end of the main line is connected with a plurality of branch pipelines, and each branch pipeline is respectively connected with a horn nozzle.

[0015] In addition, the present invention further provides a power distribution cabinet, including: a cabinet body and the automatic fire extinguishing device as described above.

[0016] For the automatic fire extinguishing device and the power distribution cabinet provided by the present invention, by connecting the open end of the first fire extinguishing agent storage to the main line, a first electromagnetic valve is connected to the main line. When the ambient temperature is greater than the first temperature threshold, the first temperature control switch controls the first electromagnetic valve to open through the first relay, and the main line sprays the fire extinguishing agent outward; when the ambient temperature is less than the second temperature threshold, the second temperature control switch controls the first electromagnetic valve to close through the first relay, and the main line stops spraying the fire extinguishing agent outward. Therefore, the automatic fire extinguishing device and the power distribution cabinet provided by the present invention can automatically respond to the fire occurring in the power distribution cabinet and perform fire extinguishing treatment, thereby enhancing the fire prevention and extinguishing effect of the power distribution cabinet and the safety of the use of the power distribution cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings here are incorporated into the specification and constitute a part of this specification, showing the embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0018] Figure 1 It is the first structural schematic diagram of the automatic fire extinguishing device provided for this embodiment;

[0019] Figure 2 It is the second structural schematic diagram of the automatic fire extinguishing device provided for this embodiment;

[0020] Figure 3 Schematic diagram of the first control circuit of the automatic fire extinguishing device provided in this embodiment;

[0021] Figure 4 Schematic diagram of the second control circuit of the automatic fire extinguishing device provided in this embodiment;

[0022] Figure 5 Schematic diagram of the third control circuit of the automatic fire extinguishing device provided in this embodiment;

[0023] Figure 6 Schematic diagram of the fourth control circuit of the automatic fire extinguishing device provided in this embodiment.

[0024] Description of reference numerals:

[0025] 101 - First fire extinguishing agent storage tank;

[0026] 102 - Second fire extinguishing agent storage tank;

[0027] 103 - Third fire extinguishing agent storage tank;

[0028] 2 - Third solenoid valve;

[0029] 3 - Second solenoid valve;

[0030] 4 - Second pressure switch;

[0031] 5 - First pressure switch;

[0032] 61 - First three-way control valve;

[0033] 62 - Second three-way control valve;

[0034] 7 - First solenoid valve;

[0035] 8 - Horn nozzle;

[0036] 9 - Second temperature control switch;

[0037] 10 - First temperature control switch;

[0038] 11 - Main line;

[0039] 12 - Branch pipeline;

[0040] 13 - Safety valve;

[0041] 14 - Power distribution cabinet;

[0042] 15 - Residual current circuit breaker;

[0043] 161 - First circuit breaker;

[0044] 162 - Second circuit breaker;

[0045] 17 - Fourth relay;

[0046] 18 - Second relay;

[0047] 19 - First relay;

[0048] 20 - First normally open button;

[0049] 21 - Second normally open button;

[0050] 22 - Third relay;

[0051] 23 - Alarm;

[0052] 24 - Third normally open button;

[0053] N - Neutral wire;

[0054] L - Live wire.

[0055] Through the above - mentioned drawings, specific embodiments of the present invention have been shown, and there will be a more detailed description hereinafter. These drawings and written descriptions are not intended to limit the scope of the inventive concept in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed embodiments

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0057] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0058] Among them, terms such as "upper" and "lower" are used to describe the relative positional relationship of each structure in the drawings, only for the sake of clarity in narration, rather than to limit the scope of the present invention that can be implemented. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope that the present invention can be implemented.

[0059] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply 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 mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the horizontal height of the first feature is less than that of the second feature.

[0060] In addition, in the present invention, unless otherwise clearly specified or limited, terms such as "installed", "connected", "joined" and "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. 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.

[0061] Fire extinguishers are usually equipped in the power distribution cabinet. When a fire occurs, fire extinguishing treatment is carried out using the fire extinguishers.

[0062] The commonly used fire extinguishers at present are hand-held fire extinguishers. The hand-held fire extinguishers include components such as a cylinder body, a valve, a spray hose, etc. Fire extinguishing agents such as carbon dioxide or dry powder are stored in the cylinder body. When a fire occurs, a person needs to hold the fire extinguisher by hand, open the valve of the fire extinguisher, and then hold the nozzle part at the front end of the spray hose, and use the ejected fire extinguishing agent to extinguish the fire.

[0063] However, the hand-held fire extinguisher cannot automatically respond to a fire and carry out fire extinguishing treatment. When using the hand-held fire extinguisher, it depends on people to discover the fire in time. If people do not discover the fire in time, it will cause the fire to spread and cause heavy losses.

[0064] In order to solve the above technical problems existing in the fire extinguishers used in the power distribution cabinet in the prior art, this embodiment provides an automatic fire extinguishing device and a power distribution cabinet. The following makes an exemplary description of the automatic fire extinguishing device provided in this embodiment from aspects such as the types of components and the connections between components, so that those skilled in the art can clearly and completely understand the technical solution provided in this embodiment and can easily implement it on the basis of understanding.

[0065] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown in the figure, the automatic fire extinguishing device provided in this embodiment includes a first fire extinguishing agent storage 101, a first solenoid valve 7, a first relay 19, a first temperature control switch 10, and a second temperature control switch 9. The first fire extinguishing agent storage 101 stores a fire extinguishing agent, and the open end of the first fire extinguishing agent storage 101 is connected to a main line 11. The first solenoid valve 7 is connected to the main line 11, and the first solenoid valve 7 is a normally closed solenoid valve. The first relay 19 is electrically connected to the first solenoid valve 7. The first temperature control switch 10 and the second temperature control switch 9 are respectively electrically connected to the first relay 19. The first temperature control switch 10 is set with a first temperature threshold, and the second temperature control switch 9 is set with a second temperature threshold, and the second temperature threshold is less than the first temperature threshold. When the ambient temperature is greater than the first temperature threshold, the first temperature control switch 10 controls the first solenoid valve 7 to open through the first relay 19, and the main line 11 sprays the fire extinguishing agent outward. When the ambient temperature is less than the second temperature threshold, the second temperature control switch 9 controls the first solenoid valve 7 to close through the first relay 19, and the main line 11 stops spraying the fire extinguishing agent outward. The first temperature control switch 10, the second temperature control switch 9, and the outlet end of the main line 11 are arranged in the power distribution cabinet 14.

[0066] Exemplarily, the main line 11 refers to the pipeline through which the fire extinguishing agent flows. One end of the main line 11 is connected to the open end of the first fire extinguishing agent storage 101, and the other end of the main line 11 is controlled by the first solenoid valve 7 to open and close. The first temperature control switch 10, the second temperature control switch 9, and the outlet end of the main line 11 are arranged in the power distribution cabinet 14, so that the first temperature control switch 10 and the second temperature control switch 9 can monitor the temperature in the power distribution cabinet 14 for a long time and control the opening and closing of the first solenoid valve 7 through the first relay 19 to achieve the automatic fire prevention and extinguishing function of the power distribution cabinet 14. Among them, the fire extinguishing agent can be carbon dioxide, dry powder, etc.

[0067] The automatic fire extinguishing device provided in this embodiment connects the open end of the first fire extinguishing agent storage 101 to the main line 11, and a first solenoid valve 7 is connected to the main line 11. When the ambient temperature is greater than the first temperature threshold, the first temperature control switch 10 controls the first solenoid valve 7 to open through the first relay 19, and the main line 11 sprays the fire extinguishing agent outward. When the ambient temperature is less than the second temperature threshold, the second temperature control switch 9 controls the first solenoid valve 7 to close through the first relay 19, and the main line 11 stops spraying the fire extinguishing agent outward. Therefore, the automatic fire extinguishing device provided in this embodiment can automatically respond to the fire occurring in the power distribution cabinet 14 and perform fire extinguishing treatment, thereby enhancing the fire prevention and extinguishing effect of the power distribution cabinet 14 and the safety of using the power distribution cabinet 14.

[0068] Such as Figure 2 、 Figure 3 and Figure 4As shown, as one of the optional implementation manners of this embodiment, the automatic fire extinguishing device provided in this embodiment further includes a second fire extinguishing agent storage 102, a second solenoid valve 3, a second relay 18, and a first pressure switch 5; the second fire extinguishing agent storage 102 is connected to the main line 11 through the second solenoid valve 3, and the second solenoid valve 3 is a normally closed solenoid valve; the first pressure switch 5 is connected to the main line 11, and the first pressure switch 5 is used to monitor the pressure of the main line 11, and the first pressure switch 5 is provided with a first pressure threshold; the first pressure switch 5 is electrically connected to the second relay 18, and the second relay 18 is electrically connected to the second solenoid valve 3; when the pressure value of the main line 11 is lower than the first pressure threshold, the first pressure switch 5 controls the second solenoid valve 3 to open through the second relay 18, and the fire extinguishing agent in the second fire extinguishing agent storage 102 enters the main line 11.

[0069] Exemplarily, in order to ensure that the amount of the fire extinguishing agent in the automatic fire extinguishing device provided in this embodiment is sufficient, the automatic fire extinguishing device provided in this embodiment may further include a second fire extinguishing agent storage 102 and a third fire extinguishing agent storage 103.

[0070] The working process of the second fire extinguishing agent storage 102 is taken as an example in this embodiment for illustration. The outlet end of the second fire extinguisher is connected with a second solenoid valve 3, and the second solenoid valve 3 is a normally closed solenoid valve, that is, under normal circumstances, the second solenoid valve 3 is in a closed state, so as to avoid excessive pressure on the main line 11 caused by connecting multiple fire extinguishing agent storages to the main line 11 at the same time, which affects the working performance of the automatic fire extinguishing device provided in this embodiment.

[0071] When the first pressure switch 5 monitors that the pressure value in the main line 11 is less than the first pressure threshold, the first pressure switch 5 opens the second solenoid valve 3 through the second relay 18, so that the fire extinguishing agent in the second fire extinguishing agent storage 102 enters the main line 11. The set value of the first pressure threshold can be referenced by the pressure value that enables the fire extinguishing agent to be normally ejected from the outlet end of the main line 11.

[0072] When there are multiple fire extinguishing agent storages provided in this embodiment, different fire extinguishing agent storages need to be gradually connected to the main line 11 to form a path. At this time, different pressure switches can be used to control the solenoid valves corresponding to different fire extinguishing agent storages, and the pressure thresholds set by each pressure switch are different, and the order in which the pressure switches control the corresponding solenoid valves to open is the same as the order in which the pressure thresholds of the pressure switches decrease.

[0073] Such as Figure 2 and Figure 4As shown in the figure, the third fire extinguishing agent storage container 103 is connected to the main line 11 through the third solenoid valve 2, and the third solenoid valve 2 is a normally closed solenoid valve; the second pressure switch 4 is connected to the main line 11, and the second pressure switch 4 is used to monitor the pressure of the main line 11. The second pressure switch 4 is provided with a second pressure threshold, where the second pressure threshold is less than the first pressure threshold; the second pressure switch 4 is electrically connected to the fourth relay 17, and the fourth relay 17 is electrically connected to the third solenoid valve 2; when the pressure value of the main line 11 is lower than the second pressure threshold, the second pressure switch 4 controls the third solenoid valve 2 to open through the fourth relay 17, and the fire extinguishing agent in the third fire extinguishing agent storage container 103 enters the main line 11. Since the second pressure threshold is less than the first pressure threshold, the second fire extinguishing agent storage container opens first. When the fire extinguishing agent in the second fire extinguishing agent storage container 102 is almost used up, that is, when the pressure in the main line 11 is less than the second pressure threshold, the third fire extinguishing agent storage container 103 will open.

[0074] As Figure 3 shown, as one of the optional implementation manners of this embodiment, the automatic fire extinguishing device provided in this embodiment further includes a circuit bus, and the circuit bus includes a neutral line N and a live line L; the first end of the second solenoid valve 3 is electrically connected to the neutral line N, and the second end of the second solenoid valve 3 is electrically connected to the live line L through the second relay 18; the first end of the first pressure switch 5 is electrically connected to the live line L, the second end of the first pressure switch 5 is electrically connected to the first signal input end of the second relay 18, and the second signal input end of the second relay 18 is electrically connected to the neutral line N.

[0075] Exemplarily, the first signal input end of the second relay 18 and the second signal input end of the second relay 18 refer to the wiring ends of the coil of the relay. When the pressure value in the main line 11 is less than the first pressure threshold of the first pressure switch 5, the first pressure switch 5 connects the coil of the second relay 18 to the neutral line N, and the second relay 18 operates, causing the second relay 18 to open the second solenoid valve 3.

[0076] As Figure 5 shown, as one of the optional implementation manners of this embodiment, the first end of the first solenoid valve 7 is electrically connected to the neutral line N, and the second end of the first solenoid valve 7 is electrically connected to the live line L through the first relay 19; the first ends of the first temperature control switch 10 and the second temperature control switch 9 are respectively electrically connected to the live line L, the second end of the first temperature control switch 10 is electrically connected to the first signal input end of the first relay 19, the second end of the second temperature control switch 9 is electrically connected to the second signal input end of the first relay 19, and the third signal input end of the first relay 19 is electrically connected to the neutral line N.

[0077] Exemplarily, when the ambient temperature is greater than the first temperature threshold, the first temperature control switch 10 closes, causing the first relay 19 to actuate. The first relay 19 connects the power supply of the first solenoid valve 7, and the first solenoid valve 7 opens, and the main line 11 sprays the fire extinguishing agent outward. When the ambient temperature is less than the second temperature threshold, the second temperature control switch 9 closes, causing the first relay 19 to act in the opposite manner as before. The first relay 19 disconnects the power supply of the first solenoid valve 7, the first solenoid valve 7 closes, and the main line 11 stops spraying the fire extinguishing agent outward.

[0078] As Figure 6 shown, as one of the optional implementation manners of this embodiment, the automatic fire extinguishing device provided in this embodiment further includes a third relay 22 and an alarm 23. The first end of the alarm 23 is electrically connected to the neutral line N, and the second end of the alarm 23 is electrically connected to the power output end of the first relay 19 through the third relay 22. The first signal input end of the third relay 22 is electrically connected to the neutral line N. The second signal input end of the third relay 22 is electrically connected to the live wire L through the third normally open button 24.

[0079] Exemplarily, in order to remind people of a fire, an alarm 23 is further provided on the automatic fire extinguishing device provided in this embodiment.

[0080] When the first relay 19 closes, the third relay 22 also closes and supplies the power of the neutral line N to the alarm 23, causing the alarm 23 to emit a sound. In the case where the fire is not extinguished, if you want to turn off the alarm 23, just close the third normally open button 24. At this time, the third relay 22 will act in the opposite manner, thereby closing the alarm 23.

[0081] As Figure 5 shown, as one of the optional implementation manners of this embodiment, the automatic fire extinguishing device provided in this embodiment further includes a first normally open button 20 and a second normally open button 21. The first normally open button 20 and the first temperature control switch 10 are in parallel, and the second normally open button 21 and the second temperature control switch 9 are in parallel.

[0082] Exemplarily, in the case of no fire, the circuit of the automatic fire extinguishing device of this embodiment can be tested by operating the first normally open button 20 and the second normally open button 21. Among them, when the first normally open button 20 closes, its function is equivalent to the closing of the first temperature control switch 10 when the ambient temperature exceeds the first temperature threshold. When the second normally open button 21 closes, its function is equivalent to the closing of the second temperature control switch 9 when the ambient temperature is lower than the second temperature threshold. Furthermore, the circuit controlling the first solenoid valve 7 can be tested to ensure that the automatic fire extinguishing device of this embodiment can be used normally.

[0083] As Figure 6As shown, as one of the optional implementation manners of this embodiment, the automatic fire extinguishing device provided in this embodiment further includes a first circuit breaker 161 and a second circuit breaker 162; the first circuit breaker 161 is disposed on the live wire L, and the first pressure switch 5 and the second relay 18 are respectively electrically connected to the live wire L through the first circuit breaker 161; the power input terminal of the first relay 19, the first terminal of the first temperature control switch 10, and the first terminal of the second temperature control switch 9 are respectively electrically connected to the live wire L through the second circuit breaker 162.

[0084] Exemplarily, the first circuit breaker 161 is used to realize the on-off of the power supply of the control circuits of the second solenoid valve 3 and the third solenoid valve 2; the second circuit breaker 162 is used to realize the on-off of the power supply of the control circuit of the first solenoid valve 7.

[0085] As Figure 6 As shown, as one of the optional implementation manners of this embodiment, the automatic fire extinguishing device provided in this embodiment further includes a safety valve 13, a first three-way control valve 61, and a leakage circuit breaker 15; the safety valve 13 is connected to the main line 11; the first end of the first three-way control valve 61 is connected to the main line 11, the second end of the first three-way control valve 61 is connected to a first pressure switch 5, and the third end of the first three-way control valve 61 is left vacant; the neutral wire N and the live wire L are electrically connected to the leakage circuit breaker 15.

[0086] Exemplarily, the safety valve 13 is used for pressure relief when the main line 11 is blocked and the pressure is too high, so as to avoid causing safety accidents. When the first pressure switch 5 is working properly, the first three-way control valve 61 conducts the end connected to the first pressure switch 5 and the end connected to the main line 11, and closes the vacant end; when replacing the first pressure switch 5, the first three-way control valve 61 conducts the end connected to the first pressure switch 5 and the vacant end, and closes the end connected to the main line 11, so as to prevent the leakage of the fire extinguishing agent when replacing the first pressure switch 5. When a second pressure switch 4 and a third fire extinguishing agent storage 103 are further provided on the automatic fire extinguishing device provided in this embodiment, the first end of the second three-way control valve 62 is connected to the main line 11, the second end of the second three-way control valve 62 is connected to the second pressure switch 4, the third end of the second three-way control valve 62 is left vacant, and the function of the second three-way control valve 62 is similar to that of the second three-way control valve 62, which will not be elaborated here.

[0087] As Figure 2 As shown, as one of the optional implementation manners of this embodiment, the outlet end of the main line 11 is connected with a plurality of branch pipelines 12, and a horn nozzle 8 is respectively connected to each branch pipeline 12.

[0088] Exemplarily, when there are multiple independent areas in the power distribution cabinet 14, the outlet end of the main line 11 is connected with a plurality of branch pipelines 12 to meet the fire extinguishing treatment of different areas.

[0089] Each branch pipeline 12 is connected to a bell nozzle 8 so that the sprayed fire extinguishing agent can be sprayed along the opening direction of the bell nozzle 8.

[0090] In addition, this embodiment further provides a power distribution cabinet 14, comprising: a cabinet body and the automatic fire extinguishing device as described above.

[0091] For example, the automatic fire extinguishing device provided in this embodiment can be installed in the power distribution cabinet 14 when the power distribution cabinet is produced and assembled, thereby forming a power distribution cabinet with an automatic fire extinguishing function.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic fire extinguishing device, characterized in that: It includes a first fire extinguishing agent storage tank, a first solenoid valve, a first relay, as well as a first temperature control switch and a second temperature control switch; The first fire extinguishing agent storage tank stores fire extinguishing agent, and an opening end of the first fire extinguishing agent storage tank is connected with a main line; the first solenoid valve is connected to the main line, and the first solenoid valve is a normally closed solenoid valve; the first relay is electrically connected to the first solenoid valve; the first temperature control switch and the second temperature control switch are respectively electrically connected to the first relay; the first temperature control switch is set with a first temperature threshold, the second temperature control switch is set with a second temperature threshold, and the second temperature threshold is less than the first temperature threshold; When the ambient temperature is greater than the first temperature threshold, the first temperature control switch controls the first solenoid valve to open through the first relay, and the main line sprays fire extinguishing agent outwards; When the ambient temperature is less than the second temperature threshold, the second temperature control switch controls the first solenoid valve to close through the first relay, and the main line stops spraying fire extinguishing agent outwards; The first temperature control switch, the second temperature control switch and the outlet end of the main line are arranged in the power distribution cabinet; It further includes a second fire extinguishing agent storage tank, a second solenoid valve, a second relay and a first pressure switch; The second fire extinguishing agent storage tank is connected to the main line through the second solenoid valve, and the second solenoid valve is a normally closed solenoid valve; The first pressure switch is connected to the main line, the first pressure switch is used to monitor the pressure of the main line, and the first pressure switch is set with a first pressure threshold; The first pressure switch is electrically connected to the second relay, and the second relay is electrically connected to the second solenoid valve; When the pressure value of the main line is lower than the first pressure threshold, the first pressure switch controls the second solenoid valve to open through the second relay, and the fire extinguishing agent in the second fire extinguishing agent storage tank enters the main line; It further includes a third fire extinguishing agent storage tank and a third solenoid valve, and the third fire extinguishing agent storage tank is connected to the main line through the third solenoid valve.

2. The automatic fire extinguishing device according to claim 1, characterized in that: It further includes a circuit bus, and the circuit bus includes a neutral line and a live line; A first end of the second solenoid valve is electrically connected to the neutral line, and a second end of the second solenoid valve is electrically connected to the live line through the second relay; a first end of the first pressure switch is electrically connected to the live line, a second end of the first pressure switch is electrically connected to a first signal input end of the second relay, and a second signal input end of the second relay is electrically connected to the neutral line.

3. The automatic fire extinguishing device according to claim 2, characterized in that: A first end of the first solenoid valve is electrically connected to the neutral line, and a second end of the first solenoid valve is electrically connected to the live line through the first relay; The first end of the first temperature control switch and the first end of the second temperature control switch are respectively electrically connected to the live wire. The second end of the first temperature control switch is electrically connected to the first signal input end of the first relay. The second end of the second temperature control switch is electrically connected to the second signal input end of the first relay. The third signal input end of the first relay is electrically connected to the neutral wire.

4. The automatic fire extinguishing device according to claim 3, characterized in that: It further includes a third relay and an alarm; The first end of the alarm is electrically connected to the neutral wire, and the second end of the alarm is electrically connected to the power output end of the first relay through the third relay; the first signal input end of the third relay is electrically connected to the neutral wire; the second signal input end of the third relay is electrically connected to the live wire through a third normally open button.

5. The automatic fire extinguishing device according to claim 4, characterized in that: It further includes a first normally open button and a second normally open button; The first normally open button is connected in parallel with the first temperature control switch, and the second normally open button is connected in parallel with the second temperature control switch.

6. The automatic fire extinguishing device according to claim 3, characterized in that: It further includes a first circuit breaker and a second circuit breaker; The first circuit breaker is arranged on the live wire, and the first pressure switch and the second relay are respectively electrically connected to the live wire through the first circuit breaker; The power input end of the first relay, the first end of the first temperature control switch, and the first end of the second temperature control switch are respectively electrically connected to the live wire through the second circuit breaker.

7. The automatic fire extinguishing device according to claim 2, characterized in that: It further includes a safety valve, a first three-way control valve, and a leakage circuit breaker; The safety valve is connected to the main line; The first end of the first three-way control valve is connected to the main line, the second end of the first three-way control valve is connected to a first pressure switch, and the third end of the first three-way control valve is left vacant; The neutral wire and the live wire are electrically connected to the leakage circuit breaker.

8. The automatic fire extinguishing device according to claim 1, characterized in that: The outlet end of the main line is connected with a plurality of branch pipelines, and each branch pipeline is respectively connected with a horn nozzle.

9. A power distribution cabinet, characterized in that, Including: A cabinet body and the automatic fire extinguishing device according to any one of claims 1 to 8.

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