A rack-mounted automatic temperature-sensing fire extinguishing device

Abstract

This utility model discloses a rack-mounted automatic temperature-sensing fire extinguishing device, relating to the field of fire extinguishing devices. It includes a fixed housing, a steel cylinder housed within the fixed housing containing a fire extinguishing agent, a control valve connected to the cylinder's outlet and extending outside the fixed housing, a triggering component mounted on the fixed housing and connected to the control valve, and a signal feedback device mounted on the fixed housing and electrically connected to the control valve. This rack-mounted automatic temperature-sensing fire extinguishing device enables rapid response and comprehensive coverage of fires in rack environments, solving the problems of delayed response and incomplete coverage in existing devices, and improving the efficiency of handling fires in rack environments.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguishing devices, specifically a rack-mounted temperature-sensing automatic fire extinguishing device. Background Technology

[0002] In data centers, communication equipment rooms, and other similar settings, rack-mounted equipment (such as servers and switches) are prone to fires due to their high power density and concentrated heat dissipation, caused by short circuits or aging components.

[0003] To adapt to the limited space within server racks, temperature sensing and fire suppression are integrated into a single device. However, existing fire suppression devices mostly rely on natural heat conduction for their temperature-sensing trigger components. In the complex airflow environment within the rack, the trigger response time is long, easily missing the optimal fire suppression opportunity. At the same time, most devices only release extinguishing agents through fixed nozzles, making it difficult to cover blind spots of multi-layered equipment within the rack, resulting in incomplete fire suppression. Utility Model Content

[0004] The purpose of this invention is to provide a rack-mounted automatic heat-sensing fire extinguishing device. This device can achieve rapid response and comprehensive coverage for fires in rack environments, solving the problems of delayed response and incomplete coverage of existing devices, and improving the efficiency of handling fires in rack environments.

[0005] The above-mentioned optimized structure of this utility model is achieved through the following technical solution: a rack-mounted automatic temperature-sensing fire extinguishing device, including a fixed shell; A steel cylinder, which is located inside the fixed housing, and contains a fire extinguishing agent; A control valve, which is connected to the outlet of the gas cylinder and extends outside the fixed housing; A triggering component, which is disposed on the fixed housing and connected to the control valve; A signal feedback device is mounted on the fixed housing and electrically connected to the control valve.

[0006] In some embodiments, the triggering component includes a first release port, which is disposed on the fixed housing and connected to the control valve; A release tube, wherein the release tube is connected to the first release port; The nozzle is located at the bottom of the release tube and is equipped with a temperature-sensing glass ball.

[0007] In some embodiments, the triggering component further includes a second release port, which is disposed on the fixed housing and connected to the control valve; A flexible fire detection tube is connected to the second release port.

[0008] In some embodiments, the fixed housing includes a housing, the gas cylinder is disposed inside the housing, and the control valve, the triggering component and the signal feedback device are disposed on one side of the housing; Mounting plate, which is located on the side of the housing away from the control valve.

[0009] In some embodiments, a pressure gauge is also included, which is located on the side of the housing away from the mounting plate and connected to the cylinder.

[0010] In some embodiments, the signal feedback device is a temperature sensor.

[0011] In some embodiments, the control valve is a solenoid valve.

[0012] In some embodiments, a three-way valve is also included, the three-way valve being disposed between the control valve, the first release port, and the second release port; A pressure monitor is located between the three-way valve and the second release port, and is electrically connected to the control valve.

[0013] In some embodiments, the three-way valve is a three-way solenoid valve.

[0014] In summary, this utility model has the following beneficial effects: This rack-mounted automatic heat-sensing fire extinguishing device combines the mechanical triggering of a heat-sensing glass bulb with the electronic triggering of a flexible fire detection tube for close-range temperature sensing and a signal feedback device. It can achieve rapid response to fires in rack environments. Through the distribution of the release pipe and the flexible fire detection tube, it can cover different areas within the rack, achieving comprehensive coverage and solving the problems of delayed response and incomplete coverage of existing devices. This improves the efficiency of handling fires in rack environments. The release pressure is monitored in real time by a pressure monitor, ensuring the fire extinguishing effect while saving extinguishing agent. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the present invention with the cover plate removed.

[0016] In the diagram: 1. Fixed shell; 11. Shell; 12. Mounting plate; 2. Gas cylinder; 3. Control valve; 4. Trigger assembly; 41. First release port; 42. Release pipe; 43. Nozzle; 44. Second release port; 5. Signal feedback device; 6. Pressure gauge; 7. Three-way valve; 8. Pressure monitor. Detailed Implementation

[0017] 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.

[0018] refer to Figure 1-2 A rack-mounted automatic temperature-sensing fire extinguishing device includes a fixed housing 1, a steel cylinder 2, a control valve 3, a triggering component 4, and a signal feedback device 5. The fixed housing 1 serves as the load-bearing structure of the device, and its specific dimensions can be customized according to the cabinet. The steel cylinder 2 is housed inside the fixed housing 1. The steel cylinder 2 can be a high-pressure container made of 316 stainless steel and stores a fire extinguishing agent, which can be either heptafluoropropane or perfluorohexanone, depending on the actual situation. It can be fixed inside the fixed housing 1 by clamps. The control valve 3 is connected to the outlet of the steel cylinder 2, and the steel cylinder 2 can be connected to the control valve by threads. 3. Sealed connection: The sealing surface can be made of copper gasket to ensure pressure-resistant sealing. One side of the control valve 3 extends to the outside of the fixed housing 1. The triggering component 4 is located on the fixed housing 1 and connected to the control valve 3. The triggering component 4 can collect fire signals and send the signals to the control valve 3, so that the control valve 3 can quickly open after receiving the trigger signal and release the extinguishing agent in the cylinder 2 to extinguish the fire. The signal feedback device 5 is located on the fixed housing 1 and electrically connected to the control valve 3. The signal feedback device 5 can monitor the fire signals inside the cabinet. After the fire is extinguished, it sends a signal to the control valve 3, and the control valve 3 stops working.

[0019] In some embodiments, the triggering component 4 includes a first release port 41, a release tube 42, and a nozzle 43. The first release port 41 may be a brass interface, fixed to the side wall of the fixed housing 1 via a flange, and its input end may be sealed to the output end of the control valve 3 via a high-pressure hose. The release tube 42 may be a stainless steel corrugated pipe, with one end threaded to the first release port 41 and the other end extending downwards to the protected area. The nozzle 43 may be a 120° fan-shaped atomizing nozzle, fixed to the bottom of the release tube 42 via a quick connector; this is prior art and will not be elaborated here. A temperature-sensitive glass bulb is embedded at the nozzle orifice of the nozzle 43. The temperature-sensitive glass bulb can sense a breakage temperature of 68°C. The temperature-sensitive glass bulb is mechanically linked to a sealed piston inside the nozzle 43. At room temperature, the temperature-sensitive glass bulb supports the piston and seals the nozzle orifice. When the temperature reaches the target, the temperature-sensitive glass bulb breaks, and the piston opens under the pressure of the extinguishing agent, achieving directional spraying of the agent. The specific working principles of the temperature-sensitive glass bulb and the nozzle 43 are prior art and will not be elaborated here.

[0020] In some embodiments, the triggering component 4 further includes a second release port 44 and a flexible fire detection tube (not shown in the figure). The second release port 44 may be a copper interface, symmetrically arranged on the side wall of the fixed shell 1 with the first release port 41, and can be connected to the control valve 3 through a branch pipeline; the flexible fire detection tube may be a double-layer composite structure, with the inner layer being a fluororubber tube and the outer layer being a stainless steel braided mesh, the length of which can be customized according to the depth of the protected area, and can be wired according to the actual space of the cabinet to achieve full coverage of the cabinet, thereby improving the triggering sensitivity. One end of the flexible fire detection tube is connected to the output end of the second release port 44 through a pagoda connector, and the tube can be pre-filled with 0.2MPa nitrogen. When the temperature of the contact fire source reaches 170°C, the fire detection tube softens and ruptures locally, the nitrogen depressurization triggers the control valve 3 to open, and at the same time the extinguishing agent is sprayed directionally to the fire source through the rupture.

[0021] In some embodiments, the fixed shell 1 includes a shell 11 and a mounting plate 12. The shell 11 can be a cuboid box welded from cold-rolled steel plate. The inner wall can be pasted with 3mm thick flame-retardant heat insulation cotton. The steel cylinder 2 can be fixed inside by an arc-shaped clamp. The top can be provided with a cover plate, which can be fixed by bolts to facilitate the installation of the internal structure. One side wall of the shell 11 can be reserved with mounting holes for the control valve 3, the first release port 41, and the second release port 44. Sealing gaskets are provided around the holes. The mounting plate 12 can be a 5mm thick steel plate, which is vertically welded to the outer wall of the other side of the shell 11. Four waist-shaped mounting holes are opened on the surface. Rubber shock-absorbing sleeves are embedded in the holes and can be fixed to a standard frame by bolts.

[0022] In some embodiments, a pressure gauge 6 is also included. The pressure gauge 6 may be a radial Bourdon tube pressure gauge. The pressure gauge 6 may be embedded on the side wall of the housing 11 away from the mounting plate 12, with the dial facing outward, so as to make it easy to read the static pressure in the cylinder 2 directly, thereby determining the remaining amount of extinguishing agent in the cylinder 2, so that the extinguishing agent in the cylinder 2 can be replaced in time when it is insufficient.

[0023] In some embodiments, the signal feedback device 5 can be a PT100 platinum resistance temperature sensor. Its detection end extends out of the outer side of the housing 11 through a metal bracket, facing the heat-dense area of ​​the protected region. The sensing wire passes through the inside of the housing 11 and is electrically connected to the control module of the control valve 3. It can monitor the ambient temperature in real time so that after the fire is extinguished, it can feed back a signal to the control valve 3 to close the control valve 3. At the same time, when the temperature exceeds 68°C, it can output an electrical signal to the control valve 3 as an electronic trigger source, forming a dual sensing structure with the trigger component 4, thereby improving the sensitivity of temperature sensing. In some embodiments, the control valve 3 may be a direct-acting solenoid valve that can receive mechanical trigger signals from the temperature-sensing glass bulb and electronic signals from the signal feedback device 5. Once either signal is triggered, the valve core is opened to release the fire extinguishing agent in the cylinder 2.

[0024] In some embodiments, the system also includes a three-way valve 7 and a pressure monitor 8. The inlet end of the three-way valve 7 is connected to the outlet end of the control valve 3 via a stainless steel pipe. The two outlet ends are respectively connected to the first release port 41 and the second release port 44. The three-way valve 7 can be a three-way solenoid valve, which can switch the path via a control signal. The pressure monitor 8 can be a diffused silicon pressure sensor, which can be installed on the pipeline between the three-way valve 7 and the second release port 44 via a three-way connector to detect the pressure inside the flexible fire detection tube. The signal output end of the pressure monitor 8 is electrically connected to the control valve 3. When the pressure is lower than the set value, such as 0.3 MPa, it can feed back a signal to the control valve 3 to increase the opening of the control valve 3. This increases the pressure when the distance between the rupture point of the flexible fire detection tube and the second release port 44 is far, in order to compensate for the energy loss due to friction between the extinguishing agent and the inner wall of the flexible fire detection tube during the flow of the extinguishing agent, thereby ensuring sufficient extinguishing pressure and thus ensuring the extinguishing effect.

[0025] In some embodiments, the device also includes a battery, a control circuit board, and a buzzer alarm. The battery and the control circuit board are electrically connected to the buzzer alarm, control valve 3, signal feedback device 5, three-way valve 7, and pressure monitor 8, which can realize the automatic control of the fire extinguishing device.

[0026] The specific working principle is as follows: When a small fire occurs inside the frame, the temperature at nozzle 43 reaches 68°C, causing the temperature-sensing glass bulb to rupture and the sealing piston to lose support, opening under the pressure of the subsequent extinguishing agent. Simultaneously, the signal feedback device 5 detects a temperature ≥68°C and sends an electronic signal to control valve 3. Either triggering will activate the device, ensuring reliability and mitigating the risk of failure due to a single trigger. Control valve 3 immediately opens, connecting the three-way valve 7 to the first release port 41, fanning out and covering the middle layer of the frame.

[0027] When a major fire occurs inside the rack, the fire causes the local temperature of the flexible fire detection tube to reach 170°C. The flexible fire detection tube located at the point of ignition softens and ruptures, releasing internal nitrogen pressure and triggering control valve 3. Simultaneously, signal feedback device 5 detects a temperature >170°C and sends a strong trigger signal. After control valve 3 opens, three-way valve 7 connects to the second release port 44. The extinguishing agent is then sprayed out through the second release port 44 and the flexible fire detection tube from the rupture, precisely extinguishing the fire. During this process, pressure monitor 8 monitors the release pressure in real time. If the pressure is <0.3MPa, or if the pipeline is blocked or the distance between the ignition point and the second release port 44 is too long, control valve 3 receives the signal from pressure monitor 8 and automatically increases its opening.

[0028] Once the fire is extinguished, signal feedback device 5 detects that the temperature has dropped below 50°C and sends a reset signal to the control system, prompting manual replacement of gas cylinder 2, temperature-sensing glass bulb, and flexible fire detection tube.

[0029] 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. A rack-mounted automatic temperature-sensing fire extinguishing device, characterized in that: Includes a fixed shell (1); A steel cylinder (2) is located inside the fixed shell (1) and contains a fire extinguishing agent. Control valve (3), which is connected to the outlet of the cylinder (2) and extends to the outside of the fixed shell (1); Trigger assembly (4), which is disposed on the fixed housing (1) and connected to the control valve (3); The signal feedback device (5) is located on the fixed housing (1) and is electrically connected to the control valve (3).

2. The rack-mounted automatic temperature-sensing fire extinguishing device according to claim 1, characterized in that: The triggering component (4) includes a first release port (41), which is located on the fixed housing (1) and connected to the control valve (3); Release tube (42), the release tube (42) is connected to the first release port (41); The nozzle (43) is located at the bottom of the release tube (42) and is equipped with a temperature-sensing glass ball.

3. The rack-mounted automatic temperature-sensing fire extinguishing device according to claim 2, characterized in that: The triggering component (4) further includes a second release port (44), which is located on the fixed housing (1) and connected to the control valve (3); A flexible fire detection tube is connected to the second release port (44).

4. The rack-mounted automatic temperature-sensing fire extinguishing device according to claim 1, characterized in that: The fixed shell (1) includes a shell (11), the steel cylinder (2) is disposed inside the shell (11), and the control valve (3), the triggering component (4) and the signal feedback device (5) are disposed on one side of the shell (11). Mounting plate (12) is located on the side of the housing (11) away from the control valve (3).

5. A rack-mounted automatic temperature-sensing fire extinguishing device according to claim 4, characterized in that: It also includes a pressure gauge (6), which is located on the side of the housing (11) away from the mounting plate (12) and connected to the cylinder (2).

6. The rack-mounted automatic temperature-sensing fire extinguishing device according to claim 1, characterized in that: The signal feedback device (5) is a temperature sensor.

7. A rack-mounted automatic temperature-sensing fire extinguishing device according to claim 3, characterized in that: The control valve (3) is a solenoid valve.

8. A rack-mounted automatic temperature-sensing fire extinguishing device according to claim 3, characterized in that: It also includes a three-way valve (7), which is located between the control valve (3), the first release port (41), and the second release port (44); Pressure monitor (8) is located between the three-way valve (7) and the second release port (44) and is electrically connected to the control valve (3).

9. A rack-mounted automatic temperature-sensing fire extinguishing device according to claim 8, characterized in that: The three-way valve (7) is a three-way solenoid valve.

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