An external pressure heptafluoro-propane foam extinguishing device

Abstract

The utility model relates to fire -fighting system technical field discloses a kind of heptafluoro-propane foam fire extinguishing devices of external storage pressure formula, including support frame, the support frame outer wall is fixedly connected with baffle, the baffle is elastically connected with electric heating wire A by spring A, the baffle outer wall is hinged with switch door, the switch door is elastically connected with electric heating wire B by spring B, the switch door outer wall is fixedly connected with knob. In the utility model, the heat generated by electric heating wire is transmitted to the inside of bottle body, nitrogen is heated, nitrogen molecule thermal motion is intensified after heating, the frequency and strength of molecular impact bottle wall are significantly improved, nitrogen pressure is quickly restored to normal working range, ensure that the device can still maintain good performance in cold weather and other low-temperature scenarios, complete fire extinguishing operation stably, improve the environmental adaptability and reliability of the device, provide key protection for fire safety in low-temperature environment, effectively avoid fire extinguishing failure risk.

Description

Technical Field

[0001] This utility model relates to the field of fire protection system technology, and in particular to an externally pressurized heptafluoropropane foam fire extinguishing device. Background Technology

[0002] This device stores the extinguishing agent and the propellant gas separately. During firefighting, the independently controlled high-pressure propellant gas efficiently pushes heptafluoropropane, effectively avoiding the pressure fluctuations caused by long-term mixing of the agent and propellant gas in internally pressurized systems. This ensures stable spray pressure and higher agent purity. Furthermore, it can be adapted to agent storage tanks of different volumes by adjusting the propellant gas pressure, meeting the firefighting needs of various sizes of locations, from small protected areas to large power distribution rooms and data centers. It also offers a longer spray distance and wider coverage, quickly reaching the designed extinguishing concentration. In addition, the gas-liquid separation during storage and maintenance reduces safety risks caused by abnormal pressure, further improving the system's operational reliability.

[0003] In existing technologies, externally pressurized heptafluoropropane devices employ a gas-liquid separation storage design. Under normal conditions, the extinguishing agent and driving nitrogen are stored in separate cylinders. In the event of a fire, after the detection system is triggered, high-pressure nitrogen is first injected into the extinguishing agent cylinder to pressurize it, and then pushes the extinguishing agent through the pipeline network to be sprayed out from the nozzle, quickly reaching the extinguishing concentration. It can adjust the driving pressure, adapt to long pipelines, and is suitable for multiple scenarios. In addition, the gas and liquid states can be detected separately in daily operation, making operation and maintenance convenient and reliable.

[0004] In existing fire extinguishing devices, when the ambient temperature decreases, the nitrogen gas inside the power cylinder experiences reduced molecular thermal motion, resulting in a simultaneous decrease in the frequency and force of molecular collisions with the cylinder wall. This leads to a significant drop in nitrogen pressure, making it impossible to specifically heat the nitrogen gas inside the cylinder to restore the activity of molecular thermal motion. Consequently, the nitrogen pressure is difficult to rise back to the normal range required for fire extinguishing operations. This defect directly causes problems such as difficulty in starting the fire extinguishing device, insufficient spray pressure of the extinguishing medium, shortened spray distance, or shortened spray time in low-temperature scenarios due to insufficient nitrogen power. In severe cases, it may even be unable to complete the fire extinguishing operation. To address these issues, an externally pressurized heptafluoropropane foam fire extinguishing device is proposed. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides an externally pressurized heptafluoropropane foam fire extinguishing device, which aims to solve the problems in the prior art caused by insufficient nitrogen power, such as difficulty in starting, insufficient spray pressure of the fire extinguishing medium, shortened spray distance or spray time, and in severe cases, even inability to complete the fire extinguishing operation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an externally pressurized heptafluoropropane foam fire extinguishing device, comprising a support frame, a baffle fixedly connected to the outer wall of the support frame, a heating wire A elastically connected to the baffle via a spring A, a switch door hinged to the outer wall of the baffle, a heating wire B elastically connected to the switch door via a spring B, and a knob fixedly connected to the outer wall of the switch door.

[0007] As a further description of the above technical solution: A manifold is fixedly connected to the outer wall of the support frame, and a connecting valve A is detachably connected to the outer wall of the manifold.

[0008] As a further description of the above technical solution: The outer wall of the baffle is hinged with a fixing strip, and the inner wall of the fixing strip is fitted with a heptafluoropropane bottle.

[0009] As a further description of the above technical solution: The outer wall of the heptafluoropropane bottle is detachably connected to a connecting pipe, and the outer wall of the connecting pipe is fitted to the inner wall of the switch door.

[0010] As a further description of the above technical solution: One end of the spring A is fixedly connected to the inner wall of the baffle, and the other end of the spring A is fixedly connected to the outer wall of the heating wire A.

[0011] As a further description of the above technical solution: One end of the spring B is fixedly connected to the inner wall of the door, and the other end of the spring B is fixedly connected to the outer wall of the heating wire B.

[0012] As a further description of the above technical solution: The top of the switch door has a through hole that matches the connecting pipe, and the connecting pipe is detachably connected to a connecting valve B.

[0013] As a further description of the above technical solution: The top of the baffle is fixedly connected to a heating wire control switch, and the outer wall of the connecting valve B is detachably connected to a power cylinder.

[0014] This utility model has the following beneficial effects: 1. In this utility model, the heat generated by the heating wire is transferred to the inside of the bottle to heat the nitrogen gas. After heating, the thermal motion of the nitrogen gas molecules intensifies, and the frequency and force of the molecules colliding with the bottle wall are significantly increased. The nitrogen gas pressure can be quickly restored to the normal working range, ensuring that the device can maintain good performance in low-temperature scenarios such as cold weather and stably complete the fire extinguishing operation. This improves the environmental adaptability and reliability of the device, provides key protection for fire safety in low-temperature environments, and effectively avoids the risk of fire extinguishing failure.

[0015] 2. In this utility model, the spring, with its excellent elastic deformation capability, can be adapted to power bottles of different sizes, and can tightly fit the outer wall of the bottle to achieve stable clamping. It can be used for bottles of different specifications, which greatly improves the compatibility of the device with power bottles and ensures the stability of the overall structure of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of an externally pressurized heptafluoropropane foam fire extinguishing device proposed in this utility model; Figure 2 This is a schematic diagram of the internal structure of the opening and closing door of an externally pressurized heptafluoropropane foam fire extinguishing device proposed in this utility model. Figure 3 This is a schematic diagram of the explosion structure of the opening and closing door of an externally pressurized heptafluoropropane foam fire extinguishing device proposed in this utility model.

[0017] Legend: 1. Support frame; 2. Baffle; 3. Spring A; 4. Heating wire A; 5. Switch door; 6. Spring B; 7. Heating wire B; 8. Power cylinder body; 9. Knob; 10. Manifold; 11. Connecting pipe; 12. Connecting valve A; 13. Fixing strip; 14. Heptafluoropropane cylinder body; 15. Connecting valve B; 16. Heating wire control switch. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1-3 The present invention provides an embodiment of an externally pressurized heptafluoropropane foam fire extinguishing device, comprising a support frame 1, a baffle 2 fixedly connected to the outer wall of the support frame 1, the baffle 2 being connected by welding for protection and limiting, the baffle 2 being elastically connected to a heating wire A4 via a spring A3, the heating wire A4 being able to heat the powered cylinder 8, the baffle 2 being hinged to a switch door 5, the outer wall of the baffle 2 having a protective switch door 5, the switch door 5 being elastically connected to a heating wire B7 via a spring B6, the heating wire B7 being able to heat the powered cylinder 8, a knob 9 fixedly connected to the outer wall of the switch door 5, and a threaded knob 9 fixedly connected to the outer wall of the switch door 5.

[0020] Reference Figures 1-3The support frame 1 has a fixed connection to a manifold 10 for collecting and transmitting fire extinguishing media. The manifold 10 has a detachable connection to a connecting valve A12 for controlling the flow of the media. The baffle 2 has a hinged fixing strip 13 for fixing the heptafluoropropane cylinder 14. The inner wall of the fixing strip 13 is attached to the heptafluoropropane cylinder 14. The outer wall of the heptafluoropropane cylinder 14 is detachably connected to a connecting pipe 11. The outer wall of the connecting pipe 11 is attached to the inner wall of the switch door 5 to ensure the stability of the connection.

[0021] Reference Figures 1-3 One end of spring A3 is fixedly connected to the inner wall of baffle 2, and the other end of spring A3 is fixedly connected to the outer wall of heating wire A4. One end of spring B6 is fixedly connected to the inner wall of switch door 5, and the other end of spring B6 is fixedly connected to the outer wall of heating wire B7. A through hole adapted to the connecting pipe 11 is opened at the top of switch door 5. The size of the through hole matches the connecting pipe 11 to facilitate the passage of the connecting pipe 11. A connecting valve B15 is detachably connected to the connecting pipe 11. A connecting valve B15 for controlling the flow of medium is detachably connected to the connecting pipe 11. A heating wire control switch 16 for controlling the working state of the heating wire is fixedly installed at the top of baffle 2. A power cylinder 8 is detachably connected to the outer wall of connecting valve B15. A power cylinder 8 that provides power to the device is detachably connected to the outer wall of connecting valve B15.

[0022] Working Principle: In colder weather, the nitrogen gas inside the power cylinder 8 is in a low-temperature environment, which reduces the frequency and force of nitrogen molecules impacting the inner wall of the power cylinder 8, resulting in a significant drop in nitrogen pressure. This fire extinguishing device is equipped with a heating wire control switch 16, which controls the circuit's on / off state. When the ambient temperature is low and affects the nitrogen pressure inside the power cylinder, the operator uses the heating wire control switch 16. Current then flows through heating wires A4 and B7. The current generates heat as it passes through the conductors, converting electrical energy into internal energy, thus generating heat in the heating wires. This heat is transferred to the inside of the power cylinder 8, heating the nitrogen gas. The heated nitrogen molecules undergo increased thermal motion, increasing the frequency and force of their impacts on the inner wall of the cylinder, allowing the nitrogen pressure to rise. This improves the nitrogen pressure problem caused by low temperature, ensuring the fire extinguishing device maintains good performance and can function normally even in low-temperature environments.

[0023] Springs A3 and B6 in the device have good elastic deformation capabilities. When different sized power cylinders 8 need to be placed, springs A3 and B6 will expand and contract accordingly based on the specific size of the cylinder. For larger power cylinders 8, during placement, the power cylinder 8 exerts a squeezing effect on springs A3 and B6, causing them to be compressed more significantly. At this time, springs A3 and B6 rely on their own elastic restoring force after compression to tightly adhere to the outer wall of the power cylinder 8, stabilizing the cylinder from both sides or around it. For smaller power cylinders... When the power bottle 8 is placed, the compression force on springs A3 and B6 is relatively small, and the springs will stretch to a certain extent. Even after stretching, springs A3 and B6 can still act on the power bottle 8 through their own elastic force, stabilizing the bottle in a suitable position within the device. In this way, regardless of the size or specifications of the power bottle 8, springs A3 and B6 can adapt to it based on their elastic characteristics, ensuring that the power bottle 8 can be stably installed in the device without shaking or shifting. This guarantees the compatibility of the device with power bottles 8 of different specifications, improving the applicability and flexibility of the device.

[0024] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An externally pressurized heptafluoropropane foam fire extinguishing device, comprising a support frame (1), characterized in that: The support frame (1) has a baffle (2) fixedly connected to its outer wall. The baffle (2) is elastically connected to a heating wire A (4) via a spring A (3). The baffle (2) has a hinged switch door (5). The switch door (5) is elastically connected to a heating wire B (7) via a spring B (6). The switch door (5) has a knob (9) fixedly connected to its outer wall.

2. The externally pressurized heptafluoropropane foam fire extinguishing device according to claim 1, characterized in that: The outer wall of the support frame (1) is fixedly connected to a manifold (10), and the outer wall of the manifold (10) is detachably connected to a connecting valve A (12).

3. The externally pressurized heptafluoropropane foam fire extinguishing device according to claim 1, characterized in that: The outer wall of the baffle (2) is hinged with a fixing strip (13), and the inner wall of the fixing strip (13) is fitted with a heptafluoropropane bottle (14).

4. The externally pressurized heptafluoropropane foam fire extinguishing device according to claim 3, characterized in that: The outer wall of the heptafluoropropane bottle (14) is detachably connected to a connecting pipe (11), and the outer wall of the connecting pipe (11) is in contact with the inner wall of the switch door (5).

5. The externally pressurized heptafluoropropane foam fire extinguishing device according to claim 1, characterized in that: One end of the spring A (3) is fixedly connected to the inner wall of the baffle (2), and the other end of the spring A (3) is fixedly connected to the outer wall of the heating wire A (4).

6. The externally pressurized heptafluoropropane foam fire extinguishing device according to claim 1, characterized in that: One end of the spring B (6) is fixedly connected to the inner wall of the switch door (5), and the other end of the spring B (6) is fixedly connected to the outer wall of the heating wire B (7).

7. The externally pressurized heptafluoropropane foam fire extinguishing device according to claim 1, characterized in that: The top of the switch door (5) is provided with a through hole that is compatible with the connecting pipe (11), and the connecting pipe (11) is detachably connected to the connecting valve B (15).

8. The externally pressurized heptafluoropropane foam fire extinguishing device according to claim 7, characterized in that: The top of the baffle (2) is fixedly connected to a heating wire control switch (16), and the outer wall of the connecting valve B (15) is detachably connected to a power cylinder (8).

Images