Perfluorohexanone fire extinguishing device with multi-stage linkage function

Abstract

The invention discloses a perfluorohexanone fire extinguishing device with a multi-stage linkage function, which is applied to the field of fire extinguishing equipment. According to the scheme, a plurality of pre-breaking knots are arranged on a fire detection tube, when a plurality of fire points appear in a power distribution cabinet, the plurality of adjacent pre-breaking knots can be automatically broken, and after being broken, the fire detection tube can still stably convey a fire extinguishing agent; the fire extinguishing agent can be sprayed out from multiple fire points, synchronous fixed-point fire extinguishing is achieved, the problem that in the prior art, fixed-point fire extinguishing is difficult to conduct on downstream fire points is solved, fire extinguishing efficiency is greatly improved, fire extinguishing comprehensiveness is higher, fire extinguishing dead angles are not prone to occurring, air pressure can be compensated in the reverse direction in cooperation with the arrangement of the air pressure compensation unit, and fire extinguishing efficiency is improved. And the fire extinguishing agent is transported from the tail end of the fire detection pipe to the broken pre-breaking position in the reverse direction and sprayed out, the influence of insufficient pressure of a downstream fire point on fire extinguishing agent spraying is effectively compensated, and the fire extinguishing effect and the fire extinguishing efficiency are further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fire extinguishing equipment, in particular to a perfluorocyclohexanone fire extinguishing device with multi-stage linkage function. BACKGROUND

[0002] The perfluorocyclohexanone automatic fire extinguishing device is mainly applied to fire extinguishing protection in small spaces. After extinguishing the fire, there is no residue, and it is applied to closed scenes such as power distribution rooms, energy storage cabinets, data machine rooms, etc. Its service range covers more than ten industries such as power equipment, energy grid, petrochemical industry, rail transit, etc. The adaptive scenes include high and low voltage power distribution cabinets, lithium battery power stations, new energy vehicles, etc. The application scenarios extend to cable troughs, container energy storage cabinets, industrial and commercial energy storage cabinets, and household energy storage cabinets, etc.

[0003] The existing direct type perfluorocyclohexanone automatic fire extinguishing device has a fire detection tube extending into the power distribution cabinet, and the fire detection tube is distributed in a snake shape along the bracket on which the electrical elements are installed inside. When the corresponding electrical element abnormally heats up, the fire detection tube at the corresponding position will break, causing the internal gas pressure to decrease, thereby triggering automatic fire extinguishing and achieving point fire extinguishing. For example, a direct type fire detection tube type perfluorocyclohexanone fire extinguishing device is disclosed in Chinese patent CN216358769U, and a lithium battery module level fire extinguishing device is disclosed in Chinese patent CN218853352U. However, when multiple fire points occur in the power distribution cabinet at the same time, it is difficult to achieve point fire extinguishing for one or more fire points located downstream, resulting in poor point fire extinguishing effect. SUMMARY

[0004] The core of the present application is to set multiple pre-breaking points on the fire detection tube. When multiple fire points occur in the power distribution cabinet at the same time, synchronous point fire extinguishing can be achieved, thereby solving the problem that downstream fire points are difficult to extinguish in the prior art. In addition, with the setting of the gas pressure compensation unit, the gas pressure can also be compensated in the opposite direction, effectively compensating for the influence of insufficient pressure on the injection of fire extinguishing agent for downstream fire points.

[0005] To solve the above problems, the technical scheme adopted by the present application is as follows.

[0006] A perfluorocyclohexanone fire extinguishing device with multi-stage linkage function, comprising a steel cylinder installed outside the power distribution cabinet box, an audible and visual alarm, and a temperature sensor and a smoke sensor installed at the top of the power distribution cabinet, the audible and visual alarm being electrically connected with the steel cylinder, the steel cylinder being fixedly connected with a cross pipe at the top, a main electromagnetic valve being installed on the upper end of the cross pipe, a main gas pressure gauge being installed on the right end of the cross pipe, a four-way valve being fixedly connected with the left end of the cross pipe, a transition pipe being connected between the outlet of the main electromagnetic valve and the end of the four-way valve away from the cross pipe, a secondary gas pressure gauge being fixedly installed in front of the four-way valve, and a delivery main pipe being fixedly connected with the lower end of the four-way valve, the connection between the cross pipe and the four-way valve being not communicated; The end of the conveying main pipe penetrates the outer wall of the power distribution cabinet near the top and extends into the power distribution cabinet, and the end of the conveying main pipe in the power distribution cabinet is fixedly connected with a shunt pipe, a fire detection pipe is connected to the shunt pipe, the fire detection pipe is filled with high-pressure nitrogen, the fire detection pipe is arranged in a serpentine shape on a plurality of supports in the power distribution cabinet for installing electrical components, a plurality of pre-breaks are connected in series to the fire detection pipe, the plurality of pre-breaks are arranged corresponding to the plurality of supports, and at least one pre-break corresponds to one support; The pre-break includes two threaded joints, a gas passing pipe threaded between the two threaded joints, a pre-melting sleeve wrapped outside the middle part of the gas passing pipe, and two compression sleeve rings respectively threaded with the left and right ends of the gas passing pipe, and the ends of the two compression sleeve rings close to each other are respectively pressed and sleeved outside the two ends of the pre-melting sleeve, a jet port is opened in the middle outer end of the gas passing pipe, and the two threaded joints are respectively fixedly connected with the two ends of the corresponding fire detection pipe.

[0007] Further, the jet port is located between the two compression sleeve rings, and neither of the two compression sleeve rings coincides with the jet port.

[0008] Further, the pre-melting sleeve is made of a low-melting-point material, and the melting points of the plurality of pre-melting sleeves are all higher than the highest safe operating temperature of the electrical components on the corresponding supports, and the temperature difference is not more than 5℃.

[0009] Optionally, the shunt pipe is further provided with a surface fire extinguishing unit, the surface fire extinguishing unit includes a spray head fixedly installed on the top of the power distribution cabinet and a top jet pipe connected between the spray head and the shunt pipe, and an upper electromagnetic valve is further arranged at the connection between the top jet pipe and the shunt pipe.

[0010] Optionally, it further includes a gas pressure compensation unit, the gas pressure compensation unit includes a nitrogen tank installed parallel to the steel cylinder on the outer wall of the power distribution cabinet, a reverse pipe connected between the shunt pipe and the end of the fire detection pipe, a gas supplement pipe fixedly connected between the nitrogen tank and the upper end of the steel cylinder, a gas pump installed on the gas supplement pipe, a one-way valve installed on the mouth of the reverse pipe close to the fire detection pipe, a lower electromagnetic valve installed on the mouth of the reverse pipe close to the shunt pipe, and a pressure sensor installed at the end of the fire detection pipe, the pressure sensor being signal connected with the lower electromagnetic valve.

[0011] Optionally, the gas pressure compensation unit further includes a flow conversion assembly arranged in the pre-break, the flow conversion assembly includes a flow distribution plate fixedly connected to the inner wall of the middle part of the gas passing pipe, two limiting half-rings fixedly connected to the inner wall of the gas passing pipe, and a flow conversion plate slidably connected with the flow distribution plate, the outer edge of the flow conversion plate matches the inner wall of the gas passing pipe, and the compression sleeve ring is located on the side of the flow distribution plate close to the jet port.

[0012] Further, the two limiting half-rings are respectively located on the two sides of the jet port, the flow conversion plate is in contact with the limiting half-ring close to the downstream side, and a pre-melting half-ring is cast between the inner wall of the gas passing pipe and the edge of the flow conversion plate, the pre-melting half-ring is located on the side of the flow conversion plate close to the jet port.

[0013] Furthermore, the pre-melted semi-ring is made of the same material as the pre-melted sleeve, and the melting point is also consistent. The fire detection tube, top injection tube, and reverse tube are all made of flame-retardant materials with high melting points.

[0014] Compared with the prior art, the advantages of this invention are: (1) This solution sets up multiple pre-break knots on the fire detection tube. When multiple fire points appear in the distribution cabinet, it can achieve synchronous fixed-point fire extinguishing, so as to solve the problem that it is difficult to extinguish fire points in the downstream of the existing technology. In comparison, it greatly improves the fire extinguishing efficiency, makes the fire extinguishing more comprehensive, and is less likely to have fire extinguishing dead corners.

[0015] (2) With the setting of the air pressure compensation unit, the air pressure can also be compensated from the reverse direction, so that the extinguishing agent is transported and sprayed from the end of the fire detection tube towards the ruptured pre-knot, effectively compensating for the impact of insufficient pressure on the downstream ignition point on the spraying of the extinguishing agent, and further improving the extinguishing effect and extinguishing efficiency. Attached Figure Description

[0016] Figure 1 This is a perspective view of the invention installed on a power distribution cabinet; Figure 2 This is a perspective view of the present invention; Figure 3 This is a front view of the present invention; Figure 4 This is a schematic diagram illustrating the simultaneous multi-point fire suppression system of the present invention. Figure 5 This is a perspective view of the pre-break point of the present invention; Figure 6 This is an exploded view of the pre-knot breaking of the present invention; Figure 7 This is a schematic diagram of the invention when a pressure booster bottle is added; Figure 8 This is a schematic diagram illustrating the multi-point synchronous fixed-point fire extinguishing process of the present invention when an air pressure compensation unit is added; Figure 9 This is a half-sectional view of the pre-break junction in the addition of the converter component according to the present invention; Figure 10 This is a half-sectional schematic diagram of the pre-break knot during reverse pressure compensation according to the present invention.

[0017] Explanation of the labels in the diagram: 1. Gas cylinder, 101. Main pressure gauge, 102. Auxiliary pressure gauge, 103. Main solenoid valve, 104. Gas supply pipe, 105. Nitrogen tank, 2. Main delivery pipe, 201. Transition pipe, 3. Audible and visual alarm, 4. Fire detection pipe, 51. Top injection pipe, 52. Nozzle, 6. Pre-break knot, 61. Threaded joint, 62. Gas transfer pipe, 63. Pre-melted sleeve, 64. Pressure ring, 601. Injection port, 7. Diverter pipe, 8. Reverse pipe, 91. Diverter plate, 92. Flow converter plate, 93. Limiting half ring, 94. Pre-melted half ring. Detailed Implementation

[0018] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0019] First implementation method: like Figures 1-3 A perfluorohexanone fire extinguishing device with multi-level linkage function includes a gas cylinder 1 installed outside the distribution cabinet, an audible and visual alarm 3, and a temperature sensor and a smoke sensor installed on the top of the distribution cabinet. The audible and visual alarm 3 is electrically connected to the gas cylinder 1. A cross tube is fixedly connected to the top of the gas cylinder 1. A main solenoid valve 103 is installed at the upper end of the cross tube. A main pressure gauge 101 is installed at the right end of the cross tube. The main pressure gauge 101 is used to monitor whether the gas pressure inside the gas cylinder 1 is abnormal. A four-way valve is fixedly connected to the left end of the cross tube. A transition pipe 201 is connected between the end of the four-way valve away from the cross tube and the outlet of the main solenoid valve 103. A secondary pressure gauge 102 is fixedly installed at the front end of the four-way valve. The secondary pressure gauge 102 is used to monitor whether the fire detection tube 4 is abnormal, so as to trigger the fire extinguishing device in case of abnormality and respond to the fire extinguishing at the first time. A delivery main pipe 2 is fixedly connected to the lower end of the four-way valve. The connection between the cross tube and the four-way valve is not connected. The end of the main conveying pipe 2 penetrates the outer wall near the top of the distribution cabinet and extends into the distribution cabinet. The end of the main conveying pipe 2 inside the distribution cabinet is fixedly connected to a branch pipe 7. A fire detection pipe 4 is connected to the branch pipe 7. The fire detection pipe 4 is filled with high-pressure nitrogen. The fire detection pipe 4 is arranged in a serpentine pattern on multiple brackets inside the distribution cabinet for installing electrical components. Multiple pre-break knots 6 are connected in series on the fire detection pipe 4. Multiple pre-break knots 6 are set on multiple brackets, and each bracket corresponds to at least one pre-break knot 6. In specific implementation, the number of pre-break knots 6 can be selected according to the size of the internal space of the distribution cabinet and the actual needs. like Figures 5-6 The pre-fusion sleeve 6 includes two threaded joints 61, a gas-filling pipe 62 threaded between the two threaded joints 61, a pre-fusion sleeve 63 wrapped around the outer side of the middle part of the gas-filling pipe 62, and two pressure rings 64 threaded to the left and right ends of the gas-filling pipe 62 respectively. The ends of the two pressure rings 64 close to each other are pressed and sleeved on the outer sides of both ends of the pre-fusion sleeve 63. A spray port 601 is drilled at the outer end of the middle part of the gas-filling pipe 62. The two threaded joints 61 are fixedly connected to the two ends of the corresponding fire detection tube 4 respectively. The spray port 601 is located between the two pressure rings 64, and the two pressure rings 64 do not coincide with the spray port 601. The pre-fusion sleeve 63 is made of a low melting point material, and the melting point of multiple pre-fusion sleeves 63 is higher than the maximum safe operating temperature of the electrical components on the corresponding support, and the temperature difference does not exceed 5°C, generally around 70°C. In specific implementation, it can be set according to the performance of the specific electrical components.

[0020] In addition, the two threaded joints 61 facilitate the assembly and disassembly of the pre-knot breaker 6 and the fire detection tube 4. After the pre-melting sleeve 63 is heat-melted, the staff can simply unscrew it and replace the pre-knot breaker 6 without replacing the entire fire detection tube 4, thus reducing the cost of use.

[0021] When an abnormal temperature rise occurs inside the cabinet, the temperature anomaly is most noticeable at the nearest pre-fused sleeve 6. When the temperature reaches its melting point, the pre-fused sleeve 63 melts, exposing the spray nozzle 601. At this time, the nitrogen pre-filled in the fire detection tube 4 leaks, causing the pressure inside the fire detection tube 4 to drop rapidly. After the auxiliary pressure gauge 102 detects this signal, it feeds the signal back to the audible and visual alarm 3, controlling it to alarm and promptly alerting the staff to the anomaly. When the temperature sensor or smoke sensor on the top of the cabinet simultaneously detects the anomaly, the main solenoid valve 103 opens (the setting of the temperature sensor or smoke sensor can effectively prevent the pre-fused sleeve 63 from melting due to temperature fluctuations and thus falsely triggering this fire extinguishing device). This allows the fire extinguishing device to respond immediately upon confirmation of the anomaly. The high-pressure nitrogen inside propels the perfluorohexanone extinguishing agent outward along the cross tube, main solenoid valve 103, transition pipe 201, four-way valve, main delivery pipe 2, diversion pipe 7, and fire detection tube 4, finally reaching the pre-fused sleeve 6 near the ignition point for spraying, achieving targeted fire extinguishing.

[0022] In addition, once the fire extinguishing device is triggered, it can automatically control the power distribution cabinet to cut off the power, so as to prevent the temperature from continuing to rise and reduce safety hazards. This part is existing technology and will not be described in detail here.

[0023] This solution, by setting multiple pre-break knots 6 on the fire detection tube, enables simultaneous targeted fire suppression when multiple fire points appear in the distribution cabinet. This solves the problem of difficulty in targeted fire suppression of downstream fire points in existing technologies, significantly improving fire suppression efficiency and making the fire suppression more comprehensive, reducing the likelihood of dead zones in extinguishing agent coverage. Furthermore, in this embodiment, after the pre-melted sleeve 63 is heat-fused, only the spray nozzle 601 serves as the flame outlet, and the fire detection tube 4 remains connected front and rear, allowing some extinguishing agent to still be delivered downstream. Compared to the destructive breakage of the fire detection tube 4 at the fire point through complete heat fusion in existing technologies, if a fire point also occurs downstream, multiple targeted fire suppression points can be simultaneously extinguished, thereby significantly improving the fire suppression effect and efficiency of this fire suppression device and providing better protection for electrical components in the distribution cabinet.

[0024] It is worth noting that in this embodiment, a power distribution cabinet is used as an example for implementation. In actual use, it can also be used for fire extinguishing inside battery packs, power distribution rooms, energy storage cabinets, etc.

[0025] In summary, this solution, by setting multiple pre-break points 6 on the fire detection tube, can trigger an intelligent alarm and quickly activate the fire extinguishing device when multiple fire points appear in the distribution cabinet, achieving multi-level linkage. Furthermore, it can achieve synchronous targeted fire extinguishing, solving the problem of difficulty in targeted fire extinguishing of downstream fire points in existing technologies. Compared with other solutions, it significantly improves fire extinguishing efficiency, makes fire extinguishing more comprehensive, and reduces the likelihood of fire extinguishing blind spots.

[0026] Second implementation method: This embodiment adds an area fire suppression unit to the first embodiment, while the rest remains the same as the first embodiment.

[0027] like Figure 4 The diversion pipe 7 is a three-way pipe, and a surface fire extinguishing unit is also installed at the third outlet of the diversion pipe 7. The surface fire extinguishing unit includes a nozzle 52 fixedly installed on the top of the distribution cabinet and a top spray pipe 51 connected between the nozzle 52 and the diversion pipe 7. An upper solenoid valve is also installed at the connection between the top spray pipe 51 and the diversion pipe 7.

[0028] In this embodiment, when a pre-break knot 6 on the fire detection tube 4 breaks, triggering the spraying of extinguishing agent, if the temperature sensor inside the distribution cabinet detects a slow temperature drop, the upper solenoid valve can be opened, thereby connecting the top spray pipe 51 with the main delivery pipe 2. This allows the nozzle 52 to simultaneously spray extinguishing agent from the top of the distribution cabinet, achieving comprehensive fire extinguishing of the distribution cabinet. Combined with the targeted fire extinguishing in the first embodiment, this presents a point-to-area coordinated fire extinguishing approach. Compared to single-point fire extinguishing or overall comprehensive fire extinguishing in existing technologies, this solution allows for simultaneous implementation of two fire extinguishing methods, effectively ensuring the comprehensiveness of fire extinguishing within the distribution cabinet, effectively preventing the occurrence of dead zones covered by extinguishing agent within the distribution cabinet, and significantly reducing damage to electrical components caused by abnormal temperature rise.

[0029] The third implementation method: This embodiment adds a pressure compensation unit to the second embodiment, while the rest remains the same as the first embodiment.

[0030] like Figures 7-8In the diagram, 'a' represents high-pressure nitrogen and 'b' represents perfluorohexanone extinguishing agent. The system also includes a pressure compensation unit, which consists of a nitrogen tank 105 mounted parallel to cylinder 1 on the outer wall of the distribution cabinet, and a reverse pipe 8 connected between the end of the diversion pipe 7 and the fire detection pipe 4. A gas supply pipe 104 is fixedly connected between the nitrogen tank 105 and the upper end of cylinder 1. A gas pump is installed on the gas supply pipe 104. When the fire extinguishing device is triggered, the gas pump can be activated simultaneously, supplying high-pressure nitrogen into cylinder 1, thereby effectively assisting in the extinguishing process. The problem of insufficient spray pressure caused by the diversion of fire extinguishing agent from the top spray pipe 51 and the fire detection pipe 4, as well as the multi-point spraying of fire extinguishing agent, is effectively solved. This ensures that the fire extinguishing agent can be sprayed out and spread quickly, effectively ensures the coverage area during fire extinguishing, and effectively avoids the occurrence of dead corners in the coverage of fire extinguishing agent. A one-way valve is installed at the opening of the reverse pipe 8 near the fire detection pipe 4 to effectively prevent the fire extinguishing agent flowing in the forward direction along the fire detection pipe 4 from flowing back into the reverse pipe 8 and the main delivery pipe 2. A lower solenoid valve is installed at the opening of the reverse pipe 8 near the diversion pipe 7.

[0031] It is worth noting that in this embodiment, the diversion pipe 7 is a four-way pipe, and the additional opening of the diversion pipe 7 is used to connect to the reverse pipe 8, so that the fire detection pipe 4 can be supplied with extinguishing agent in both the forward and reverse directions.

[0032] like Figure 8 A pressure sensor is installed at the end of the fire detection tube 4. The pressure sensor is connected to the lower solenoid valve. The pressure sensor can effectively monitor the pressure changes at the end of the fire detection tube 4. If there is a single point rupture, the pressure in the fire detection tube 4 will drop only slightly within a unit time. However, if there are multiple points of rupture, the pressure drop rate will be significantly faster than that of a single point rupture. If the pressure drop rate reaches the preset threshold in the pressure sensor, it is determined that there is a multi-point abnormal high temperature. At this time, the lower solenoid valve receives the signal from the pressure sensor and opens, causing the reverse compensation to be activated. At this time, part of the extinguishing agent delivered in the main delivery tube 2 is diverted to the reverse pipe 8 at the diversion pipe 7 and flows back into the fire detection tube 4 from the end of the fire detection tube 4 along the reverse pipe 8. This ensures that there is enough extinguishing agent at the downstream ignition point and that it is sprayed with sufficient pressure. This compensates for the insufficient pressure at the downstream ignition point caused by multiple pressure leaks upstream, thus effectively ensuring the stable, continuous, and rapid spraying of the extinguishing agent and ensuring the fire extinguishing effect.

[0033] Fourth implementation method: This embodiment adds a converter component to the third embodiment, while the rest remains the same as the third embodiment.

[0034] like Figure 9The pressure compensation unit also includes a flow converter assembly disposed within the pre-break knot 6. The flow converter assembly includes a flow divider plate 91 fixedly connected to the inner wall of the middle section of the air-transfer pipe 62, two limiting semi-rings 93 fixedly connected to the inner wall of the air-transfer pipe 62, and a flow converter plate 92 slidably connected to the flow divider plate 91. The outer edge of the flow converter plate 92 matches the inner wall of the air-transfer pipe 62, and the pressure ring 64 is located on the side of the flow divider plate 91 near the injection port 601. The two limiting semi-rings 93 are respectively located on the side of the injection port 601. On both sides, the converter plate 92 contacts the limiting semi-ring 93 near the downstream side, and a pre-melted semi-ring 94 is cast between the inner wall of the air pipe 62 and the edge of the converter plate 92. The pre-melted semi-ring 94 is located on the side of the converter plate 92 near the nozzle 601. The diverter plate 91 is used to divert the flow, effectively ensuring that a portion of the extinguishing agent always flows to the nozzle 601, so that the extinguishing agent can be stably sprayed out after the pre-melted sleeve 63 is hot-melted. At the same time, it also effectively ensures that a portion of the extinguishing agent can flow to the downstream pre-breakage point 6.

[0035] The pre-melted semi-ring 94 and the pre-melted sleeve 63 are made of the same material and have the same melting point, so that they can melt synchronously when the corresponding electrical components heat up abnormally or catch fire. This allows the converter plate 92 to move. If the pressure of the upstream extinguishing agent is greater, the converter plate 92 will still be in contact with the downstream limiting semi-ring 93, and the extinguishing agent from the upstream will extinguish or cool the ignition point or temperature abnormality point. Conversely, if the converter plate 92 is in contact with the upstream limiting semi-ring 93, the extinguishing agent from the downstream will extinguish or cool the ignition point or temperature abnormality point. The fire detection tube 4, the top spray tube 51, and the reverse tube 8 are all made of high melting point flame retardant material, so that when this fire extinguishing device is triggered, the fire detection tube 4, the top spray tube 51, and the reverse tube 8 used to transport the extinguishing agent are not easily damaged. Instead, the damage point is preset at the spray port 601, so that when multiple ignition points occur, the extinguishing agent can still be stably delivered to the downstream ignition point.

[0036] like Figure 10 In this embodiment, when the reverse pipe 8 is triggered and reverses to deliver extinguishing agent to the fire detection pipe 4, the pre-melted sleeve 63 and the pre-melted semi-ring 94 on the pre-break knot 6 at the downstream ignition point are both thermally melted, which releases the restriction of the converter plate 92. Furthermore, due to insufficient pressure upstream and greater pressure from the downstream extinguishing agent, the converter plate 92 can gradually move away from the upstream limiting semi-ring 93 under the thrust of the downstream extinguishing agent until it comes into contact with it. At this time, the converter plate 92 can intercept the upstream extinguishing agent, making it less likely for the nozzle 601 to collide and become disordered due to extinguishing agents with different directions. This allows the downstream compensated extinguishing agent to be sprayed smoothly, stably, and continuously along the nozzle 601, performing synchronous fixed-point extinguishing of the downstream ignition point.

[0037] With the addition of a pressure compensation unit, the pressure can be compensated in reverse, allowing the extinguishing agent to be transported and sprayed from the end of the fire detection tube 4 toward the ruptured pre-break knot 6. This effectively compensates for the impact of insufficient pressure at the downstream ignition point on the extinguishing agent spray, further improving the extinguishing effect and efficiency.

[0038] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A perfluorocyclohexanone fire extinguishing device with multi-stage linkage function, comprising a steel cylinder (1) installed outside the cabinet box of a power distribution cabinet, an audible and visual alarm (3), and a temperature sensor and a smoke sensor installed on the top of the power distribution cabinet, wherein the audible and visual alarm (3) is electrically connected with the steel cylinder (1), characterized in that: The steel bottle (1) top fixedly connected with cross pipe, the cross pipe upper end is installed with main electromagnetic valve (103), the cross pipe right end is installed with main gas pressure gauge (101), the cross pipe left end fixedly connected with four-way valve, the four-way valve away from the cross pipe one end and the outlet between main electromagnetic valve (103) are connected with transition pipe (201), the four-way valve front end fixedly installed with auxiliary gas pressure gauge (102), the four-way valve lower end fixedly connected with delivery main pipe (2), the cross pipe and four-way valve junction is not communicated; The delivery main pipe (2) end penetrates the outer wall of the power distribution cabinet near the top and extends into the power distribution cabinet, and the end of the delivery main pipe (2) in the power distribution cabinet is fixedly connected with a shunt pipe (7), the shunt pipe (7) is connected with a fire detection tube (4), the fire detection tube (4) is filled with high-pressure nitrogen, the fire detection tube (4) is arranged in a serpentine shape on a plurality of supports for installing electrical components in the power distribution cabinet, a plurality of pre-breaks (6) are connected in series on the fire detection tube (4), and a plurality of pre-breaks (6) are provided corresponding to a plurality of supports, and at least one pre-break (6) corresponds to one support on one support. The pre-break (6) includes two threaded joints (61), a gas passage (62) threadedly connected between the two threaded joints (61), a pre-melt sleeve (63) wrapped outside the middle portion of the gas passage (62), and two pressure sleeve rings (64) threadedly connected with the left and right ends of the gas passage (62), respectively, and the ends of the two pressure sleeve rings (64) close to each other are respectively pressed and sleeved outside the two ends of the pre-melt sleeve (63), and the middle outer end of the gas passage (62) is drilled with a jet port (601), and the two threaded joints (61) are respectively fixedly connected with the two ends of the corresponding fire detection tube (4).

2. The perfluorocyclohexanone fire extinguishing device with multi-stage linkage function according to claim 1, characterized in that: The jet port (601) is located between the two pressure sleeve rings (64), and the two pressure sleeve rings (64) do not coincide with the jet port (601).

3. The perfluorocyclohexanone fire extinguishing device with multi-stage linkage function according to claim 2, characterized in that: The pre-melt sleeve (63) is made of low-melting-point material, and the melting points of the plurality of pre-melt sleeves (63) are higher than the highest safe operating temperature of the electrical components on the corresponding supports, and the temperature difference is not more than 5℃.

4. The perfluoroketone fire extinguishing apparatus with multi-stage linkage function according to claim 1, characterized in that: The shunt pipe (7) is also provided with a surface fire extinguishing unit, the surface fire extinguishing unit includes a nozzle (52) fixedly installed on the top of the power distribution cabinet and a top jet pipe (51) connected between the nozzle (52) and the shunt pipe (7), and an upper electromagnetic valve is further provided at the connection between the top jet pipe (51) and the shunt pipe (7).

5. The perfluoroketone fire extinguishing apparatus with multi-stage linkage function according to claim 4, characterized in that: It also includes a gas pressure compensation unit, the gas pressure compensation unit includes a nitrogen tank (105) installed parallel to the steel bottle (1) on the outer wall of the power distribution cabinet, a reverse pipe (8) connected between the shunt pipe (7) and the end of the fire detection tube (4), a gas supplement pipe (104) fixedly connected between the nitrogen tank (105) and the upper end of the steel bottle (1), a gas pump installed on the gas supplement pipe (104), a one-way valve installed on the mouth of the fire detection tube (4) close to the reverse pipe (8), a lower electromagnetic valve installed on the mouth of the shunt pipe (7) close to the reverse pipe (8), a pressure sensor installed at the end of the fire detection tube (4), and the pressure sensor is signal connected with the lower electromagnetic valve.

6. The perfluoroketone fire extinguishing apparatus with multi-stage linkage function according to claim 5, characterized in that: The air pressure compensation unit further comprises a flow changing assembly arranged in the pre-breaking joint (6), the flow changing assembly comprising a flow dividing plate (91) fixedly connected to the inner wall of the middle part of the air passage pipe (62), two limiting half-rings (93) fixedly connected to the inner wall of the air passage pipe (62), and a flow changing plate (92) slidably connected to the flow dividing plate (91), the outer edge of the flow changing plate (92) being matched with the inner wall of the air passage pipe (62), and the pressing sleeve ring (64) being located on the side of the flow dividing plate (91) close to the injection port (601).

7. The perfluoroketone fire extinguishing apparatus with multi-stage linkage function according to claim 6, characterized in that: The two limiting half-rings (93) are respectively located on the two sides of the injection port (601), the flow changing plate (92) is in contact with the limiting half-ring (93) close to the downstream side, and a pre-melting half-ring (94) is cast between the inner wall of the air passage pipe (62) and the edge of the flow changing plate (92), the pre-melting half-ring (94) being located on the side of the flow changing plate (92) close to the injection port (601).

8. The perfluoroketone fire extinguishing apparatus with multi-stage linkage function according to claim 7, characterized in that: The pre-melting half-ring (94) is made of the same material as the pre-melting sleeve (63), and the melting points are consistent, the fire detecting pipe (4), the top injection pipe (51) and the reverse pipe (8) are all made of high-melting point flame-retardant materials.

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