Fire alarm device for underground comprehensive pipe gallery

Abstract

This invention relates to a fire alarm device for underground utility tunnels, comprising a smoke detector body, a linkage warning plate attached to the surface of the smoke detector body, a drive motor mounted on the top wall of the smoke detector body, a magnetic bending plate connected to the output end of the drive motor, a linkage module installed inside the smoke detector body, an electric nozzle with an external water pipe slidably mounted through the bottom of the smoke detector body, a heat insulation box installed inside the smoke detector body, a linkage rod connected to one side inner wall of the heat insulation box via a bearing, a miniature electric telescopic rod connected to the end of the linkage rod, a servo motor mounted on the inner wall of the heat insulation box, a second bevel gear fixedly sleeved on the surface of the linkage rod, a sleeve rod connected to the output end of the servo motor, and a first bevel gear meshing with the second bevel gear sleeved on the surface of the support rod, realizing the linkage management of the underground utility tunnel fire alarm device, and also being able to effectively extinguish fires in special locations.

Description

Technical Field

[0001] This invention relates to a fire alarm device for underground utility tunnels, and more particularly to a fire alarm device for underground utility tunnels used in the field of alarm and warning. Background Technology

[0002] Underground utility tunnels are used in engineering projects such as airports, subways, and tunnels. To ensure the safe use of underground utility tunnels, fire alarm devices are usually used to provide early warning of fires in underground spaces. However, existing fire alarm devices typically use a combination of smoke detectors and electric sprinklers to extinguish fires. Nevertheless, the environment at the fire scene still contains harmful substances such as smoke and dust, which can affect the health of people on site.

[0003] To address the aforementioned issues, a certain design in the market employs fire alarm and optimization techniques, and has achieved a certain market share.

[0004] Chinese invention patent CN202211355947.5 discloses a public space fire early warning and firefighting device based on the Internet of Things (IoT). The device includes a protective shell with a sealing sheet fixed to its top surface. A water spray system, auxiliary lights, and a dust collection structure are detachably connected to the protective shell. A protective tube is fixed to the side wall of the protective shell, and a pump is detachably connected inside the tube. In use, the smoke sensor can detect the smoke concentration at the location in real time. When the smoke concentration reaches a suitable value, the smoke sensor sends a signal to the controller. The controller then controls the alarm, strobe lights, and pump. The alarm and strobe lights alert personnel at the location, and the pump collects external water and sprays it onto the location. This allows the firefighting equipment to automatically alarm and handle fires, maximizing the escape opportunities for people at the fire location.

[0005] When the aforementioned fire alarm devices are in use, the fire alarm devices near the fire point are difficult to provide timely linkage warnings, which can lead to disorderly escape when people are escaping from underground spaces, reducing escape efficiency. At the same time, the fixed angle of the sprinkler head makes it ineffective in extinguishing fires at specific locations.

[0006] Application content

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to realize the linkage management of fire alarm devices in underground utility tunnels, and at the same time, to effectively extinguish fires in special locations.

[0008] To address the aforementioned problems, this invention provides a fire alarm device for underground utility tunnels, comprising a smoke detector body, a linkage warning plate attached to the surface of the smoke detector body, a drive motor mounted on the top wall of the smoke detector body, a magnetically connected bent plate connected to the output end of the drive motor, a linkage module installed inside the smoke detector body and electrically connected to the smoke detector body, a smoke inlet at the bottom of the smoke detector body, an electric nozzle with an external water pipe slidably mounted through the bottom of the smoke detector body, an insulation box installed inside the smoke detector body, a linkage rod connected to one side of the inner wall of the insulation box via a bearing, a miniature electric telescopic rod connected to the bottom of the linkage rod and the top of the electric nozzle at the top, a servo motor mounted below the linkage rod on the inner wall of the insulation box, a second bevel gear fixedly sleeved on the surface of the linkage rod, a sleeve rod connected to the output end of the servo motor, a support rod connected above the sleeve rod, and a first bevel gear meshing with the second bevel gear sleeved on the surface of the support rod.

[0009] In the aforementioned fire alarm device for underground utility tunnels, linkage management can be achieved during fire early warning management in the underground utility tunnel. The smoke detector body installed near the fire point can use the rotation of the surface linkage warning plate to remind the escapee of the direction of the fire point, thereby enabling effective escape. In addition, the electric sprinkler head can be used to spray at an angle to effectively extinguish the fire point located directly below the smoke detector body and in the fire extinguishing blind zone.

[0010] As a further improvement of this application, a locking block is connected to the support rod near the bottom end, the sleeve rod has a recessed cylindrical groove inside, and the inner wall of the cylindrical groove has several square grooves that are fitted and slidably connected with the locking block. Several locking blocks located above the locking block are installed on the support rod surface, and the inner wall of the first bevel gear has a strip groove corresponding to the locking block.

[0011] As a further improvement of this application, the length of the strip groove is less than the thickness of the first bevel gear, and the height of the top of the strip groove is lower than the height of the top of the first bevel gear. The strip groove and the snap-fit ​​block are engaged and slidably connected.

[0012] As a further improvement of this application, the alarm panel is provided with a vacuum groove inside, and the vacuum groove is filled with neon gas and has an electric wire arranged inside, which is electrically connected to the smoke alarm body.

[0013] As a further improvement of this application, a thermal expansion plate is installed on one inner wall of the insulation box, and a backing plate is connected to the end of the thermal expansion plate. The backing plate has a through hole inside, and the radius of the through hole is not less than the sum of the cross-sectional width of the snap-fit ​​block and the radius of the support rod. The cross-sectional width of the snap-fit ​​block is not less than the cross-sectional width of the snap-fit ​​block.

[0014] As a further improvement of this application, in the initial state, the overlapping area of ​​the tail end of the abutment plate and the bottom end of the support rod does not exceed one-fifth of the projected area of ​​the support rod.

[0015] As a further improvement of this application, the top wall of the insulation box is connected with a bent pipe, and the bent pipe is distributed on both sides of the linkage rod. The tail end of the bent pipe is connected to the top of the surface of the first bevel gear through a rotary joint.

[0016] As another improvement of this application, the surface of the linkage warning board is provided with a through groove located above the vacuum groove. A hot melt block is embedded in the surface of the through groove, and symmetrically arranged elastic telescopic members are arranged on the inner wall of the through groove. The tail end of the elastic telescopic member is connected to a drop block.

[0017] As a further improvement to this application, the drop block and the hot melt block are in abutting contact, and the stretching length of the elastic telescopic component is greater than the vertical distance between the bottom of the linkage warning plate and the through groove.

[0018] In summary, this application utilizes a linkage warning board, which can effectively warn of fires by determining whether the electric wire is activated or not. It can also provide targeted warnings to smoke detectors installed near the ignition point, preventing disorderly escapes and improving escape efficiency. Furthermore, the application employs a miniature electric telescopic rod, servo motor, and linkage rod to adjust the spray direction of the electric nozzles, effectively extinguishing fires in specific locations, such as directly below the smoke detector or on the ceiling. This enhances the smoke detector's overall fire response capabilities and improves the safety management of underground utility tunnels. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of this application;

[0020] Figure 2 This is a structural diagram of the smoke alarm body according to the first embodiment of this application;

[0021] Figure 3 This is a bottom view of the smoke detector body according to the first embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the internal structure of the insulated box according to the first embodiment of this application;

[0023] Figure 5 This is an exploded view of the servo motor and thermal expansion plate according to the first embodiment of this application.

[0024] Figure 6 This is a schematic diagram showing the start-up state of the miniature electric telescopic rod and servo motor according to the first embodiment of this application.

[0025] Figure 7 This is a schematic diagram of the linkage alarm board status in the first embodiment of this application;

[0026] Figure 8 This is a schematic diagram of an escape route after the linkage warning board is activated in the first embodiment of this application.

[0027] Figure 9 This is a schematic diagram of the extinguishing path of the electric nozzle when the miniature electric telescopic rod and servo motor of the first embodiment of this application are not started;

[0028] Figure 10 This is a schematic diagram of the extinguishing path of the electric nozzle when the miniature electric telescopic rod and servo motor of the first embodiment of this application are started.

[0029] Figure 11 This is a schematic diagram of the structure of the second embodiment of this application;

[0030] Figure 12 This is a cross-sectional view of the third embodiment of this application;

[0031] Figure 13 This is a schematic diagram of the working state of the third embodiment of this application.

[0032] Explanation of the labels in the diagram:

[0033] 1. Smoke alarm body; 2. Linkage warning panel; 21. Hot melt block; 22. Drop block; 23. Elastic telescopic component; 3. Magnetic bending plate; 4. Drive motor; 5. Insulation box; 6. Smoke inlet; 7. Electric nozzle; 8. Servo motor; 81. Sleeve rod; 82. Support rod; 821. Locking block; 822. First bevel gear; 823. Locking block; 9. Miniature electric telescopic rod; 10. Linkage rod; 101. Second bevel gear; 11. Thermal expansion plate; 111. Support plate. Detailed Implementation

[0034] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0035] Implementation method 1:

[0036] Figure 1-10This invention discloses a fire alarm device for underground utility tunnels, comprising a smoke detector body 1, a linkage warning plate 2 attached to the surface of the smoke detector body 1, a drive motor 4 mounted on the top wall of the smoke detector body 1, a magnetically attached bent plate 3 connected to the output end of the drive motor 4 and magnetically connected to the linkage warning plate 2, a linkage module installed inside the smoke detector body 1 and electrically connected to the smoke detector body 1, a smoke inlet 6 at the bottom of the smoke detector body 1, and an electric sprinkler head 7 with an external water pipe slidably mounted through the bottom of the smoke detector body 1. The inside of the fog alarm body 1 is equipped with a heat insulation box 5. A linkage rod 10 is connected to one side of the inner wall of the heat insulation box 5 via a bearing. The end of the linkage rod 10 is connected to a miniature electric telescopic rod 9 whose bottom is connected to the top of the electric nozzle 7. A servo motor 8 is installed on the inner wall of the heat insulation box 5 below the linkage rod 10. A second bevel gear 101 is fixedly sleeved on the surface of the linkage rod 10. The output end of the servo motor 8 is connected to a sleeve rod 81, and a support rod 82 is connected above the sleeve rod 81. A first bevel gear 822 is sleeved on the surface of the support rod 82 and meshes with the second bevel gear 101.

[0037] Specifically, when a fire occurs, the smoke detector body 1 in the fire environment is the first to sense the presence of the fire. Then, it uses the linkage module to send relevant signals to the linkage modules in the smoke detector bodies 1 around the smoke detector body 1 that detected the fire. At this time, the drive motor 4 inside the surrounding smoke detector bodies 1 rotates at a corresponding angle, so that the linkage warning plates 2 on the surface of the surrounding smoke detector bodies 1 all face the smoke detector body 1 in the fire environment, thereby achieving the linkage warning effect.

[0038] When the smoke detector body 1 detects a fire, it activates the electric sprinkler head 7, which forms an umbrella-shaped jet of water to suppress and extinguish the fire.

[0039] Because the water jet from the electric sprinkler head 7 has a blind spot, it is difficult to effectively extinguish the fire when the ignition point is directly below the smoke alarm body 1. At this time, the linkage rod 10 rotates and the mini electric telescopic rod 9 is activated, allowing the electric sprinkler head 7 to fall. Since the diameter of the electric sprinkler head 7 is larger than that of the mini electric telescopic rod 9, the diameter of the circular hole for sliding of the electric sprinkler head 7 at the bottom of the insulation box 5 and the smoke alarm body 1 is larger than that of the mini electric telescopic rod 9. This allows the electric sprinkler head 7 to deflect smoothly, so that the sprayed water jet can impact the ignition point directly below the smoke alarm body 1 and the fire spreading through the ceiling, achieving vertical fire extinguishing treatment, and thus effectively extinguishing the fire in a special location.

[0040] It should be added that, depending on the location of the fire and the spread of the fire, the miniature electric telescopic rod 9 is selectively activated. When the miniature electric telescopic rod 9 is activated (the miniature electric telescopic rod 9 is activated synchronously with the servo motor 8), the electric nozzle 7 made of heat insulation material falls, and the gap formed allows external heat to enter the interior of the heat insulation box 5, thereby causing the thermal expansion plate 11 to extend and triggering the subsequent linkage rod 10 to rotate.

[0041] A locking block 821 is connected to the surface of the support rod 82 near the bottom. The sleeve rod 81 has a recessed cylindrical groove inside, and the inner wall of the cylindrical groove has several square grooves that are fitted and slidably connected with the locking block 821. Several locking blocks 823 are installed on the surface of the support rod 82 above the locking block 821, and the inner wall of the first bevel gear 822 has a strip groove corresponding to the locking block 823.

[0042] Specifically, in the initial state, the support rod 82 is located above the sleeve rod 81, so that the linkage rod 10 is in a non-rotating state;

[0043] After the support rod 82 falls into the cylindrical groove inside the sleeve rod 81, the locking block 821 falls into one of the square grooves. As the sleeve rod 81 rotates with the servo motor 8, it can smoothly drive the support rod 82 to rotate. This, in turn, drives the first bevel gear 822, which is connected to the strip groove through the locking block 823, to rotate. This, in turn, drives the second bevel gear 101 to rotate, thereby driving the linkage rod 10 to rotate, causing the electric nozzle 7 to deflect.

[0044] The length of the strip groove is less than the thickness of the first bevel gear 822, and the height of the top of the strip groove is lower than the height of the top of the first bevel gear 822. The strip groove and the snap-fit ​​block 823 are engaged and slidably connected.

[0045] Specifically, when the support rod 82 is above the sleeve rod 81 or when the support rod 82 falls into the cylindrical groove inside the sleeve rod 81, the strip groove and the snap-fit ​​block 823 are always in a sliding connection state, thereby ensuring the stable connection between the support rod 82 and the first bevel gear 822.

[0046] The alarm panel 2 has a vacuum chamber inside, which is filled with neon gas and has an electric wire. The electric wire is electrically connected to the smoke alarm body 1.

[0047] Specifically, neon is a colorless gas. When a fire is detected, the filament is energized, and the neon gas, which is in a vacuum environment, turns red, which can enhance the warning effect and prevent the issuance of false alarm information when there is no fire.

[0048] A thermal expansion plate 11 is installed on one inner wall of the insulation box 5. A backing plate 111 is connected to the end of the thermal expansion plate 11. The backing plate 111 has a through hole inside, and the radius of the through hole is not less than the sum of the cross-sectional width of the snap-fit ​​block 823 and the radius of the support rod 82. The cross-sectional width of the snap-fit ​​block 823 is not less than the cross-sectional width of the snap-fit ​​block 821. In the initial state, the overlapping area of ​​the tail end of the backing plate 111 and the bottom end of the support rod 82 does not exceed one-fifth of the projected area of ​​the support rod 82.

[0049] Specifically, in the initial state, the abutment plate 111 at the tail end of the thermal expansion plate 11 can support the support rod 82 and prevent it from falling into the sleeve rod 81. When the miniature electric telescopic rod 9 is started, the heat is dissipated, and the thermal expansion plate 11 extends, causing the through hole inside the abutment plate 111 to move to the bottom of the support rod 82, so that the support rod 82 can fall into the sleeve rod 81, and then the support rod 82 can rotate under the rotation of the sleeve rod 81.

[0050] The top wall of the insulation box 5 is connected to a bent pipe, and the bent pipe is distributed on both sides of the linkage rod 10. The tail end of the bent pipe is connected to the top of the surface of the first bevel gear 822 through a rotating joint.

[0051] Specifically, the top of the bearing bend is connected to the top of the insulation box 5. This design allows the first bevel gear 822 to be kept at a constant height, thereby maintaining its meshing connection with the second bevel gear 101 without affecting its subsequent rotation.

[0052] The second implementation method:

[0053] Figure 11-13 As shown, components that are the same as or corresponding to those in the first embodiment are represented by reference numerals corresponding to those in the first embodiment. For simplicity, only the differences from the first embodiment will be described below. The difference between this second embodiment and the first embodiment is that: the surface of the linkage warning plate 2 is provided with a through groove located above the vacuum tank, a hot melt block 21 is embedded in the surface of the through groove, and symmetrically arranged elastic telescopic members 23 are arranged on the inner wall of the through groove, and a drop block 22 is connected to the tail end of the elastic telescopic member 23.

[0054] The drop block 22 and the hot melt block 21 are in abutting contact, and the stretching length of the elastic telescopic member 23 is greater than the vertical distance between the bottom of the linkage warning plate 2 and the through groove.

[0055] Specifically, this implementation method is adopted to avoid the warning effect being insignificant (among the escapees there are colorblind people and people with poor eyesight, making it difficult to easily find the warning information issued by the linkage warning board 2);

[0056] Near the ignition point, the ambient temperature rises, causing the hot melt block 21 to melt and break off from the through groove. At this time, the elastic telescopic component 23, which is in a compressed state, pops out and is straightened under the action of the drop block 22, and shakes on the surface of the linkage warning plate 2 to enhance the warning effect.

[0057] In light of current practical needs, the above-described embodiments adopted in this application are not limited to this scope of protection. Various changes made within the knowledge of those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A fire alarm device for underground utility tunnels, comprising a smoke detector body (1), characterized in that: The smoke alarm body (1) has a linkage warning plate (2) attached to its surface. A drive motor (4) is installed on the top wall of the smoke alarm body (1). The output end of the drive motor (4) is connected to a magnetically attached bent plate (3) that is magnetically connected to the linkage warning plate (2). A linkage module is installed inside the smoke alarm body (1), and the linkage module is electrically connected to the smoke alarm body (1). A smoke inlet (6) is provided at the bottom of the smoke alarm body (1). An electric nozzle (7) with an external water pipe is slidably installed through the bottom of the smoke alarm body (1). An insulation box (5) is installed inside the smoke alarm body (1). The inner wall of the insulation box (5) is connected to a linkage rod (10) via a bearing. The end of the linkage rod (10) is connected to a miniature electric telescopic rod (9) whose bottom is connected to the top of the electric nozzle (7). The inner wall of the insulation box (5) is equipped with a servo motor (8) located below the linkage rod (10). A second bevel gear (101) is fixedly sleeved on the surface of the linkage rod (10). The output end of the servo motor (8) is connected to a sleeve rod (81), and a support rod (82) is connected above the sleeve rod (81). A first bevel gear (822) is sleeved on the surface of the support rod (82) and meshes with the second bevel gear (101). A thermal expansion plate (11) is installed on one side of the inner wall of the insulation box (5). A stop plate (111) is connected to the end of the thermal expansion plate (11). The stop plate (111) has a through hole inside, and the radius of the through hole is not less than the sum of the cross-sectional width of the snap-fit ​​block (823) and the radius of the support rod (82). The cross-sectional width of the snap-fit ​​block (823) is not less than the cross-sectional width of the snap-fit ​​block (821). In the initial state, the overlapping area between the tail end of the abutment (111) and the bottom end of the support rod (82) does not exceed one-fifth of the projected area of ​​the support rod (82).

2. The fire alarm device for underground integrated pipe gallery according to claim 1, characterized in that: The support rod (82) is connected to a locking block (821) near the bottom end. The sleeve rod (81) has a recessed cylindrical groove inside, and the inner wall of the cylindrical groove has several square grooves that are fitted and slidably connected with the locking block (821). The support rod (82) is equipped with several locking blocks (823) located above the locking block (821), and the inner wall of the first bevel gear (822) has a strip groove corresponding to the locking block (823).

3. A fire alarm device for underground utility tunnels according to claim 2, characterized in that: The length of the strip groove is less than the thickness of the first bevel gear (822), and the height of the top of the strip groove is lower than the height of the top of the first bevel gear (822). The strip groove is engaged and slidably connected with the snap-fit ​​block (823).

4. A fire alarm device for underground utility tunnels according to claim 1, characterized in that: The linkage warning plate (2) has a vacuum groove inside, and the vacuum groove is filled with neon gas and has an electric wire arranged inside. The electric wire is electrically connected to the smoke alarm body (1).

5. A fire alarm device for underground utility tunnels according to claim 1, characterized in that: The top wall of the insulation box (5) is connected to a bent pipe, and the bent pipe is distributed on both sides of the linkage rod (10). The tail end of the bent pipe is connected to the top of the surface of the first bevel gear (822) through a rotating joint.

6. A fire alarm device for underground utility tunnels according to claim 4, characterized in that: The surface of the linkage warning plate (2) is provided with a through groove located above the vacuum tank. A hot melt block (21) is embedded in the surface of the through groove. The inner wall of the through groove is provided with symmetrically arranged elastic telescopic members (23), and the tail end of the elastic telescopic member (23) is connected to a drop block (22).

7. A fire alarm device for underground utility tunnels according to claim 6, characterized in that: The drop block (22) is in contact with the hot melt block (21), and the stretch length of the elastic telescopic member (23) is greater than the vertical distance between the bottom of the linkage warning plate (2) and the through groove.

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