External pressure storage perfluorohexanone fire extinguishing device

Abstract

The utility model discloses a kind of external storage pressure perfluorocyclohexanone fire extinguishing devices, it is related to fire extinguishing equipment field, including fire extinguishing agent storage bottle group, pressurized gas storage bottle group, pressurized container valve, fire container valve, spray head, solenoid valve, control panel, still include connecting pipe, connecting pipe is located between pressurized container valve and fire container valve, between fire container valve and spray head, double sealing structure is located between connecting pipe and pressurized container valve or fire container valve;This kind of external storage pressure perfluorocyclohexanone fire extinguishing device can solve the problem that connecting pipe and valve connecting part sealing are easily corroded and invalid in existing external storage pressure perfluorocyclohexanone fire extinguishing device, to ensure the reliability and fire extinguishing effect of device under long-term use and complex environment.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguishing equipment, specifically a perfluorohexanone fire extinguishing device with external pressure. Background Technology

[0002] Externally pressurized fire extinguishing devices store the extinguishing agent and the propellant (pressurized) gas separately, and have the characteristics of large agent storage capacity, wide extinguishing range, and convenient agent replacement.

[0003] In practical applications of existing externally pressurized perfluorohexanone fire extinguishing devices, the connection points between the connecting pipes and valves (pressurization container valve, fire extinguishing container valve) are the key flow channels for the agent and pressurized gas. Traditional double-seal structures often use a single rubber sealing ring, which lacks sufficient corrosion resistance and aging resistance. After long-term use, the sealing ring is prone to deformation and cracking due to pressure fluctuations, changes in ambient temperature and humidity, and potential corrosive media (such as condensate in underground garages and trace amounts of corrosive gases in chemical workshops). This allows trace amounts of corrosive media to seep into the sealing gap, resulting in continuous immersion and corrosion of the sealing ring, which in turn leads to gas leakage or agent leakage, affecting the fire extinguishing effect. Utility Model Content

[0004] The purpose of this invention is to provide an externally pressurized perfluorohexanone fire extinguishing device. This device, through a double-sealing structure, can solve the problem of easy corrosion and failure of the seal at the connection between the connecting pipe and the valve in existing externally pressurized perfluorohexanone fire extinguishing devices, thereby ensuring the reliability and fire extinguishing effect of the device in long-term use and complex environments.

[0005] The above-mentioned optimized structure of this utility model is achieved through the following technical solution: an externally pressurized perfluorohexanone fire extinguishing device, including a fire extinguishing agent storage bottle group, a pressurized gas storage bottle group, a pressurized container valve, a fire extinguishing container valve, a nozzle, a solenoid valve, a control panel, and also including a connecting pipe, wherein the connecting pipe is disposed between the pressurized container valve and the fire extinguishing container valve, and between the fire extinguishing container valve and the nozzle; A double-sealing structure is provided between the connecting pipe and the pressurized container valve or the fire extinguishing container valve.

[0006] In some embodiments, the double sealing structure includes two main grooves, which are disposed on the inner wall of the connecting pipe opening; A sealing ring is provided in the main groove and sleeved on the pressurized container valve or the fire extinguishing container valve.

[0007] In some embodiments, the dual sealing structure further includes a secondary groove disposed between the two main grooves; A water-absorbing component is disposed within the secondary groove.

[0008] In some embodiments, the double sealing structure further includes a flow guiding channel, one end of which is connected to the secondary groove, and the other end of which passes through the connecting pipe; A one-way valve is provided within the flow channel.

[0009] In some embodiments, the sealing ring includes a fluororubber ring, which is wrapped with a polytetrafluoroethylene film.

[0010] In some embodiments, the water-absorbing element is a water-swellable sealing strip.

[0011] In some embodiments, the sealing ring is interference-fitted with the main groove, and the water-absorbing element is clearance-fitted with the secondary groove.

[0012] In some embodiments, a pressure gauge is also included, which is connected to the pressurized container valve.

[0013] In summary, this utility model has the following beneficial effects: This type of externally pressurized perfluorohexanone fire extinguishing device, through its double-sealing structure, can effectively block the infiltration of external corrosive media and prevent the seals from corroding and failing, thereby ensuring the reliability and fire extinguishing effect of the device in long-term use and complex environments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention inside the opened box; Figure 2 This is a schematic diagram of the structure of the pressurized container valve and connecting pipe of this utility model; Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.

[0015] In the diagram: 1. Extinguishing agent storage cylinder group; 2. Pressurized gas storage cylinder group; 3. Pressurized container valve; 4. Extinguishing container valve; 5. Connecting pipe; 6. Double sealing structure; 61. Main tank; 62. Sealing ring; 63. Secondary tank; 64. Water suction component; 65. Flow guide channel; 66. One-way valve; 7. Pressure gauge; 8. Nozzle; 9. Solenoid valve. Detailed Implementation

[0016] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] refer to Figure 1-3An externally pressurized perfluorohexanone fire extinguishing device includes an extinguishing agent storage bottle group 1, a pressurized gas storage bottle group 2, a pressurized container valve 3, an extinguishing container valve 4, a nozzle 8, a solenoid valve 9, a control panel (not shown in the figure), a connecting pipe 5, and a double sealing structure 6. The extinguishing agent storage bottle group 1 and the pressurized gas storage bottle group 2 are housed in an openable and closable metal box, which can be placed on a platform inside the box and secured with straps. The extinguishing agent storage bottle group 1 includes at least one extinguishing agent storage bottle, which serves as a storage carrier for the perfluorohexanone extinguishing agent and is pre-filled with a measured amount of extinguishing agent to provide the agent source for the fire extinguishing process. The pressurized gas storage bottle group 2 includes at least one pressurized gas storage bottle, which stores a high-pressure driving gas (usually nitrogen). The extinguishing agent (fire extinguishing agent) is released into a pressurized container. Pressure is generated by releasing the gas, propelling the extinguishing agent from the storage cylinder group 1 outwards. A pressurized container valve 3 is installed at the outlet end of the pressurized gas storage cylinder group 2, providing a control channel for the release of pressurized gas. A solenoid valve 9 is linked to the pressurized container valve 3, enabling rapid on / off switching of the pressurized gas. An extinguishing container valve 4 is installed at the outlet end of the extinguishing agent storage cylinder group 1. When pressurized gas enters the extinguishing agent storage cylinder group 1 and reaches the set pressure, the extinguishing container valve 4 automatically opens, allowing the extinguishing agent to flow out. The nozzle 8 is the final spray component for the extinguishing agent. It is connected to the extinguishing container valve 4 via a connecting pipe 5 and is located in the protected area. It atomizes the delivered extinguishing agent and sprays it evenly over the protected area. To achieve fire suppression coverage, the control panel serves as the core of the device, integrating a control circuit board. It can be electrically connected to fire detectors and solenoid valve 9 via wires, receiving signals from the fire detectors and performing logical judgments to issue start or stop commands to solenoid valve 9. Simultaneously, it can monitor the operating status of each component. The nozzles 8, solenoid valve 9, and control panel are all existing technologies and will not be described in detail here. The connecting pipes 5 are crucial channels for fluid transmission, located between the pressurized container valve 3 and the extinguishing container valve 4, between the extinguishing container valve 4 and the nozzle 8, and between the pressurized container valve 3 and the extinguishing container valve 4. These connecting pipes 5 are used to transport the high-pressure gas released from the pressurized gas storage cylinder group 2 to the extinguishing agent storage cylinder group 1, providing a means of agent delivery. Power; the connecting pipe 5 between the fire extinguishing container valve 4 and the nozzle 8 is used to transport the fire extinguishing agent flowing out of the fire extinguishing agent storage bottle group 1 to the nozzle 8, ensuring that the agent accurately reaches the protected area. The connecting pipe 5 can be made of 304 stainless steel. The connecting pipe 5 may include a delivery pipe body. The delivery pipe body has connecting ends at both ends. The inner wall of the connecting end can be provided with external threads, which are screwed into the internal threads of the connection port of the pressurized container valve 3 and the fire extinguishing container valve 4. The double sealing structure 6 is provided at the connection between the connecting pipe 5 and the pressurized container valve 3 or the fire extinguishing container valve 4. It can block external impurities and corrosive media from entering the connection gap, and at the same time prevent the leakage of internal high-pressure fluid (pressurized gas or fire extinguishing agent), ensuring the sealing reliability of the device.

[0018] In some embodiments, the double-sealing structure 6 includes two main grooves 61 and a sealing ring 62. The double sealing enhances the basic sealing effect of the connection. The two main grooves 61 are spaced apart along the axial direction of the connecting pipe 5's opening on the inner wall of the connecting end of the connecting pipe 5. The depth and width of the grooves are adapted to the size of the sealing ring 62. The distance between the two main grooves 61 is set to 5-8 mm, forming two parallel sealing grooves, providing an installation basis for the double seal. The sealing ring 62 is correspondingly embedded in the two main grooves 61 and sleeved on the outer wall of the interface of the pressurized container valve 3 or the fire extinguishing container valve 4. After installation, the sealing ring 62 is tightly fitted to the inner wall of the main groove 61 and the outer wall of the interface of the pressurized container valve 3 or the fire extinguishing container valve 4, using the elastic deformation of the sealing ring 62 to fill the small gaps. When high-pressure fluid flows through the device, the sealing ring 62 further adheres to the sealing surface under pressure, blocking the fluid leakage path. The double-sealing ring 62 avoids the leakage risk caused by the failure of a single seal, improving sealing redundancy.

[0019] In some embodiments, the double-sealing structure 6 further includes a secondary groove 63 and a water-absorbing element 64, which can provide secondary protection against trace amounts of infiltrated media. The secondary groove 63 is formed on the inner wall of the connecting end of the connecting pipe 5 between the two main grooves 61. The groove width is larger than the cross-sectional size of the water-absorbing element 64. Its position is between the two main seals, which can intercept trace amounts of media (such as condensate in a humid environment or corrosive gases) that seep in from the gap between the main seals. The water-absorbing element 64 is disposed in the secondary groove 63, and initially maintains a small gap with the inner wall of the secondary groove 63. When trace amounts of moisture or corrosive liquid seep into the gap between the two main seals, the water-absorbing element 64 can quickly absorb these media and expand. The expanded water-absorbing element 64 will fill the gap in the secondary groove 63, forming a temporary sealing barrier to prevent the media from further diffusing into the main sealing area or the interior of the device, preventing the main sealing ring 62 from being soaked and corroded by the media, and extending the overall service life of the double-sealing structure 6.

[0020] In some embodiments, the double sealing structure 6 further includes a flow channel 65 and a one-way valve 66, which can effectively discharge the infiltrated medium. The flow channel 65 can be a through hole opened in the wall of the connecting pipe 5, with one end connected to the bottom of the secondary tank 63 to ensure that the medium accumulated in the secondary tank 63 can flow into the channel; the other end penetrates the outer wall of the connecting pipe 5 radially, and the outlet faces downward to prevent external dust and rainwater from entering the sealing gap in the reverse direction through the channel. The inner diameter of the channel is set to 2-3 mm to ensure smooth flow of the medium. The one-way valve 66 is embedded in the flow channel 65, and its conduction direction only allows fluid to flow from the secondary tank 63 to the outside of the connecting pipe 5. The one-way valve 66 can be made of polytetrafluoroethylene valve core. When the medium in the secondary tank 63 (such as the liquid that has not been completely absorbed by the suction element 64) reaches a certain amount, the medium pushes the one-way valve 66 to open under its own gravity or slight pressure, and is discharged to the outside of the device through the guide channel 65. When there are pressure fluctuations or impurities in the outside, the one-way valve 66 remains closed to prevent external substances from entering the secondary tank 63, achieving a protective effect of only discharging and not entering, and avoiding corrosion of the seals caused by long-term retention of the liquid.

[0021] In some embodiments, the sealing ring 62 adopts a composite structure of a fluororubber ring wrapped with a polytetrafluoroethylene (PTFE) film, which combines elastic sealing with corrosion resistance. The fluororubber ring has excellent elasticity, temperature resistance (-20℃ to 120℃), and aging resistance. During installation, it can fit tightly with the main groove 61 and valve interface through elastic deformation to ensure basic sealing pressure. Even under long-term high-pressure fluid impact, it is not prone to permanent deformation. The PTFE film tightly wraps around the outside of the fluororubber ring and has extremely strong corrosion resistance, resisting the erosion of strong acids, strong alkalis, organic solvents, and perfluorohexanone fire extinguishing agents, while not reacting chemically with pressurized gas. This film can isolate the fluororubber ring from direct contact with external corrosive media, preventing corrosion damage to the fluororubber ring and extending the service life of the sealing ring 62.

[0022] In some embodiments, the water-absorbing element 64 can be a water-swellable sealing strip, which can be made of butyl rubber as the base material and with added water-swellable resin. It has the characteristics of fast expansion speed (expansion rate can reach more than 150% within 1 hour after water absorption), stable volume after expansion (no shrinkage), and strong chemical corrosion resistance. When water seeps into the secondary groove 63, the sealing strip can quickly absorb water and expand, tightly filling the gap of the secondary groove 63; even if it comes into contact with a small amount of corrosive liquid (such as acidic condensate in a chemical plant), it is not easy for the material to deteriorate, and it can still maintain good water absorption and sealing performance, providing stable secondary protection for the double sealing structure 6.

[0023] In some embodiments, the sealing ring 62 and the main groove 61 are interference-fitted, with the interference amount controlled at 0.1-0.2mm. During installation, a certain pressure needs to be applied to press the sealing ring 62 into the main groove 61. The extrusion force generated by the interference fit ensures that the sealing ring 62 fits seamlessly with the inner wall of the main groove 61 and the outer wall of the valve interface, significantly improving sealing reliability and preventing high-pressure fluid leakage from the fit gap. The suction component 64 and the secondary groove 63 are clearance-fitted, with the gap amount set to 0.5-1mm, providing sufficient expansion space for the suction component 64. When the suction component 64 absorbs the medium and expands, it can fill the gap, preventing the suction component 64 from being damaged by pressure due to insufficient space, or causing excessive pressure on the inner wall of the secondary groove 63, which could lead to deformation of the connecting pipe 5 opening, thus ensuring that the suction component 64 stably performs its protective function.

[0024] In some embodiments, the device further includes a pressure gauge 7, which is sealed to the side interface of the pressurization container valve 3 via a threaded interface. The pressure gauge 7 has a range adapted to the working pressure of the pressurized gas (typically 0-40 MPa) and an accuracy class of not less than 1.0. In the standby state of the device, the pressure gauge 7 can display the pressure value in the pressurized gas storage bottle group 2 in real time. By observing the reading of the pressure gauge 7, the operator can promptly grasp the pressurized gas pressure status: when the pressure is lower than the set threshold (e.g., 15 MPa), pressurized gas can be replenished in time to avoid insufficient pressure causing a slowdown in the delivery speed of the fire extinguishing agent and insufficient spray volume, thus affecting the fire extinguishing efficiency; when the pressure rises abnormally, the fault can be investigated in time to prevent safety accidents caused by overpressure in the pressurized gas storage bottle group 2, providing pressure monitoring assurance for the stable operation of the device.

[0025] The specific working principle is as follows: When a fire occurs in the protected area, the fire detectors (such as smoke detectors and heat detectors, which are electrically connected to the control panel) first detect the fire signal and transmit the electrical signal to the control panel in real time.

[0026] After receiving the signal from the fire detector, the control panel starts the built-in logic judgment program. Once it confirms that a fire has actually occurred, it immediately issues two commands: one command is to activate the solenoid valve 9 on the pressurized container valve 3 (energize it), and the other command is to trigger the on-site audible and visual alarm.

[0027] When the solenoid valve 9 on the pressurized container valve 3 is energized, the valve core actuates, opening the passage of the pressurized container valve 3; the high-pressure nitrogen in the pressurized gas storage bottle group 2 flows rapidly into the extinguishing agent storage bottle group 1 through the connecting pipe 5 between the pressurized container valve 3 and the extinguishing container valve 4, causing the pressure in the extinguishing agent storage bottle group 1 to rise rapidly; when the pressure reaches the opening pressure threshold of the extinguishing container valve 4 (e.g., 1.2 MPa), the valve core of the extinguishing container valve 4 automatically opens, releasing the perfluorohexanone extinguishing agent in the extinguishing agent storage bottle group 1.

[0028] Under the continuous propulsion of high-pressure nitrogen, perfluorohexanone extinguishing agent is delivered to each nozzle 8 through the connecting pipe 5 between the extinguishing container valve 4 and the nozzle 8. During the delivery process, the sealing ring 62 ensures that the agent does not leak. If a small amount of condensate or corrosive medium seeps in, the water-absorbing component 64 expands to block the diffusion of the medium, and the excess liquid is discharged through the guide channel 65 and the one-way valve 66. After the agent reaches the nozzle 8, it is atomized into fine particles by the atomizing structure (such as a vortex generator) of the nozzle 8 and sprayed evenly to the protected area, terminating the combustion process and ultimately extinguishing the fire quickly.

[0029] After the fire is extinguished, the control panel issues a command to close the solenoid valve 9 of the pressurization container valve 3, and the pressurization container valve 3 is closed; after the pressure in the extinguishing agent storage bottle group 1 drops to normal pressure, the extinguishing container valve 4 is closed; the staff needs to check the double sealing structure 6 of each connecting pipe 5. If the water suction part 64 has expanded, the water suction part 64 needs to be replaced; if the sealing ring 62 is worn, the sealing ring 62 needs to be replaced; at the same time, pressurized gas is added through the pressure gauge 7 to restore the device to standby state, waiting for the next use.

[0030] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An externally pressurized perfluorohexanone fire extinguishing device, comprising an extinguishing agent storage bottle group (1), a pressurized gas storage bottle group (2), a pressurized container valve (3), an extinguishing container valve (4), a nozzle (8), a solenoid valve (9), and a control panel, characterized in that: It also includes a connecting pipe (5), which is located between the pressurized container valve (3) and the fire extinguishing container valve (4), and between the fire extinguishing container valve (4) and the nozzle (8); A double sealing structure (6) is provided between the connecting pipe (5) and the pressurized container valve (3) or the fire extinguishing container valve (4).

2. A pressurized storage full-hexone fire extinguishing device according to claim 1, characterized in that: The double sealing structure (6) includes two main grooves (61), which are located on the inner wall of the opening of the connecting pipe (5); A sealing ring (62) is provided in the main groove (61) and sleeved on the pressurized container valve (3) or the fire extinguishing container valve (4).

3. A pressurized storage full-hexone fire extinguishing device according to claim 2, characterized in that: The double sealing structure (6) also includes a secondary groove (63), which is located between the two main grooves (61); A water-absorbing element (64) is disposed in the secondary groove (63).

4. A pressurized stored energy perfluorocyclohexanone fire extinguishing apparatus according to claim 3 wherein: The double sealing structure (6) also includes a flow channel (65), one end of which is connected to the sub-groove (63), and the other end passes through the connecting pipe (5). A one-way valve (66) is provided in the flow channel (65).

5. A pressurized stored energy perfluorocyclohexanone fire extinguishing apparatus according to claim 2 wherein: The sealing ring (62) includes a fluororubber ring, which is wrapped with a polytetrafluoroethylene film.

6. A pressurized stored energy perfluorocyclohexanone fire extinguishing apparatus according to claim 3 wherein: The water-absorbing component (64) is a water-swellable sealing strip.

7. A pressurized stored energy perfluorocyclohexanone fire extinguishing apparatus according to claim 3 wherein: The sealing ring (62) is interference-fitted with the main groove (61), and the water-absorbing element (64) is clearance-fitted with the secondary groove (63).

8. A pressurized storage full-hexone fire extinguishing device according to claim 1, characterized in that: It also includes a pressure gauge (7) which is connected to the pressurized container valve (3).

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