Portable construction site fire alarm device

Abstract

The utility model discloses a portable construction site fire alarm device which comprises a gear box, a gear assembly, a driving assembly, a fan blade seat and an air bellow, the driving assembly is connected with the gear assembly and used for driving the fan blade seat to rotate, and the fan blade seat is located in the air bellow and provided with blades. The air bellow is used for forming air flow during rotation and sending out wind sounding alarm sound through an air window on the air bellow; the gear assembly comprises a gear column, a mounting disc and an auxiliary gear, and the auxiliary gear is meshed with the gear column and the gear box; the driving assembly comprises a driving disc, a driving rod, a rotating handle and a guiding structure and is used for achieving manual driving and torque transmission. The device can quickly give out high-decibel alarm sound on a construction site without electric power, is compact in structure, convenient to carry and simple to operate, and is suitable for places with insufficient electric power conditions or complex environments.

Description

A portable fire alarm device for construction sites Technical Field

[0001] This utility model belongs to the field of fire safety equipment technology, specifically relating to a portable fire alarm device for construction sites. Background Technology

[0002] Construction sites are prone to fires due to the presence of multiple high-risk factors such as welding, open flames, and flammable building materials. To reduce casualties and property damage after a fire, it is essential to promptly communicate fire information to all personnel on site. Common fire alarm devices include smoke detectors, manual alarm buttons, and electric audible and visual alarms. However, these devices often rely on electrical systems for power and are installed in relatively fixed locations, making them unsuitable for the mobile nature of construction sites where power access is limited.

[0003] In situations where power is unavailable, some construction companies use simple hand-cranked sirens to sound alarms. However, existing hand-cranked sirens are relatively complex in structure, bulky, and cumbersome to activate. Especially in emergencies, they cannot quickly locate the operating parts, affecting the timeliness of the alarm. Furthermore, some devices occupy a significant amount of space when not in use, hindering temporary deployment and daily transport on construction sites. Summary of the Invention

[0004] To address the problems existing in the prior art, the purpose of this utility model is to provide a portable fire alarm device for construction sites. This portable fire alarm device can quickly emit a high-decibel whistling sound to sound an alarm in the event of a power outage. There is an urgent need to propose a new structure to improve it in order to meet the emergency early warning needs of construction sites in the event of a sudden fire.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A portable fire alarm device for construction sites includes a gearbox, inside which a gear assembly is installed, and at the other end of the gearbox is a drive assembly for driving the gear assembly inside the gearbox to rotate.

[0007] The output end of the gear assembly is provided with a fan blade seat;

[0008] A bellows is provided at one end of the gearbox;

[0009] The fan blade holder is located inside the wind box. When the fan blade holder rotates inside the wind box, it can produce a wind alarm sound.

[0010] Furthermore, the gearbox includes a housing, and a first tooth groove is formed on the inner side wall of the housing;

[0011] Both ends of the box are provided with bottom covers, and the bottom covers are provided with first positioning holes.

[0012] A top cover is provided at one end of the box.

[0013] Furthermore, the gear assembly includes a positioning shaft, on which a gear post is sleeved. Mounting discs are sleeved at equal intervals along the height direction on the gear post. A pin hole is opened through the mounting disc, and an auxiliary gear is connected to the pin hole. The auxiliary gear meshes with the gear post and the housing respectively.

[0014] Furthermore, the drive assembly includes a drive disk, the side of which has a second toothed groove, and a positioning groove is fitted onto one end of the gear column.

[0015] A mounting base is fixedly connected to one side of the drive disk, and a positioning block is provided on the mounting base. A drive rod is slidably connected to the positioning block.

[0016] Furthermore, positioning grooves are provided on both sides of the positioning block;

[0017] The upper end face of the drive rod is provided with a guide groove, and the positioning block is located in the guide groove;

[0018] Positioning strips are fixedly connected to the opposing surfaces inside the guide grooves, and the positioning strips are engaged in the positioning grooves;

[0019] A handle is rotatably connected to one end of the drive rod.

[0020] Furthermore, a third toothed groove is provided at one end of the blade holder, and the third toothed groove is sleeved on the other end of the gear column. Blades are provided at equal intervals along the wind direction of the outer surface of the blade holder.

[0021] Furthermore, the bellows is configured as a cylindrical cavity with one end open, and a second positioning hole is provided through one end of the bellows. Wind vents are provided through the outer side of the bellows at equal intervals around its axis.

[0022] A positioning frame is provided at the open end of the bellows.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] This invention sets up a gear assembly and a fan blade seat in the gearbox, and drives the fan blade seat to rotate through the drive assembly. When the fan blade seat rotates at high speed, it can generate airflow and emit a high-decibel whistling sound through the air window on the wind box, so as to realize a rapid sound warning of fire at the construction site under the condition of no power supply. This solves the problem that the existing alarm equipment is highly dependent on power and cannot be used in the power outage environment.

[0025] This invention, through the cooperative structure of positioning block, guide groove, positioning strip and drive rod, makes the action path clear and the sliding smooth during the driving process, which can effectively improve the starting efficiency of the equipment in emergency situations, solve the problems of complex structure and inconvenient operation of traditional hand-cranked alarms, and improve the alarm response speed.

[0026] This invention employs an auxiliary gear meshing with multiple mounting discs and gear columns in the gear assembly, which effectively enhances the stability and output torque of the internal transmission system. This ensures that the fan blade seat maintains a uniform rotation speed during rapid rotation, improves the continuity and intensity of the alarm sound, and overcomes the defects of weak or intermittent alarm sound caused by unstable transmission in existing structures.

[0027] This invention designs the device as a portable and detachable structure. A positioning frame and positioning holes are set between the bellows and the drive component for quick disassembly and assembly. When not in use, it can be effectively stored and its space occupancy is reduced. This solves the problem of existing alarm devices being bulky and inconvenient to transport, and improves the flexibility and practicality of on-site deployment. Attached Figure Description

[0028] Figure 1 is a schematic diagram of the structure of this utility model;

[0029] Figure 2 is a structural schematic diagram of the gearbox of this utility model;

[0030] Figure 3 is a structural schematic diagram of the box body of this utility model;

[0031] Figure 4 is a schematic diagram of the drive assembly of this utility model;

[0032] Figure 5 is a structural schematic diagram of the gear assembly of this utility model;

[0033] Figure 6 is a structural schematic diagram of the wind turbine seat of this utility model;

[0034] Figure 7 is a schematic diagram of the structure of the bellows of this utility model.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. Gearbox;

[0037] 11. Housing; 111. First tooth groove;

[0038] 12. Bottom cover; 121. First positioning hole;

[0039] 13. Top cover;

[0040] 2. Driver components;

[0041] 21. Drive plate; 211. Second tooth groove; 212. Mounting base;

[0042] 22. Positioning block; 221. Positioning groove;

[0043] 23. Drive rod; 231. Guide groove; 232. Positioning bar; 24. Rotary handle;

[0044] 3. Gear assembly;

[0045] 31. Positioning shaft; 32. Gear post; 33. Mounting plate; 331. Pin hole; 34. Auxiliary gear;

[0046] 4. Fan blade seat; 41. Third tooth groove; 42. Blade;

[0047] 5. Bellows; 51. Second positioning hole; 52. Ventilation window; 53. Positioning bracket. Detailed Implementation

[0048] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0049] Referring to Figures 1-7, a portable fire alarm device for construction sites includes a gearbox 1, with a gear assembly 3 inside the gearbox 1 and a drive assembly 2 at the other end of the gearbox 1. The drive assembly 2 is used to drive the gear assembly 3 inside the gearbox 1 to rotate. A fan holder 4 is provided at the output end of the gear assembly 3. A bellows 5 is provided at one end of the gearbox 1. The fan holder 4 is located inside the bellows 5. When the fan holder 4 rotates inside the bellows 5, it can generate a wind alarm sound. The airflow generated by the rotation of the fan holder 4 is diffused into the surrounding space through the vent 52 on the bellows 5, thereby realizing a non-electrical audible alarm when a fire breaks out at the construction site. The overall structure adopts a portable design, which is easy to carry and deploy quickly, and is suitable for working environments with insufficient temporary power or frequent movement.

[0050] Referring to Figures 1-2, the gearbox 1 includes a housing 11, on which a first tooth groove 111 is formed. The first tooth groove 111 is used to mesh with the auxiliary gear 34, thereby realizing the rotational transmission of the multi-tooth structure inside the gear assembly 3. Both ends of the housing 11 are provided with bottom covers 12, and a first positioning hole 121 is formed through the bottom cover 12. The first positioning hole 121 is used to mechanically cooperate and position with the drive assembly 2 and the air box 5. One end of the housing 11 is provided with a top cover 13, which closes one end of the gear assembly 3 to ensure that no parts leak out or foreign objects intrude during gear rotation.

[0051] Referring to Figures 1-5, the gear assembly 3 includes a positioning shaft 31, which is installed inside the gearbox 1 and positioned by the first positioning holes 121 at both ends of the bottom cover 12. A gear column 32 is sleeved on the positioning shaft 31. The gear column 32 is a multi-stage transmission structure, which achieves efficient energy transmission through multiple sets of tooth profiles machined on its outer surface. Mounting discs 33 are evenly spaced along the height direction on the gear column 32. The mounting discs 33 are used to connect the auxiliary gear 34 and provide structural support. A pin hole 331 is opened through the mounting disc 33. The auxiliary gear 34 is connected to the pin hole 331. The auxiliary gear 34 meshes with the first tooth groove 111 of the gear column 32 and the housing 11, respectively, to improve torque output and enhance overall transmission stability.

[0052] Referring to Figure 4, the drive assembly 2 includes a drive disk 21. A second toothed groove 211 is provided through the side of the drive disk 21. The second toothed groove 211 meshes with the outer surface of the gear post 32 to realize the function of driving the internal gear transmission by external rotation. One end of the drive disk 21 is sleeved on one end of the gear post 32 through a positioning groove 221 to ensure that the direction is consistent and there is no slippage during the transmission process. A mounting base 212 is fixedly connected to one side of the drive disk 21. A positioning block 22 is provided on the mounting base 212. The positioning block 22 is connected to the drive rod 23 through a sliding structure to realize the function of pulling out and retracting the drive structure, which facilitates quick reset after the device is used.

[0053] Referring to Figure 4, positioning slots 221 are provided on both sides of the positioning block 22; a guide slot 231 is provided through the upper end face of the drive rod 23, and the positioning block 22 is located in the guide slot 231. Linear guidance is achieved during the driving process through relative sliding between the positioning block 22 and the positioning block 22; positioning strips 232 are fixedly connected to the opposing surfaces inside the guide slot 231. The positioning strips 232 are engaged in the positioning slot 221 to prevent the positioning block 22 from swinging or shifting during the sliding process; a handle 24 is rotatably connected to one end of the drive rod 23. The handle 24 is used for manual force operation by the user. The rotational action drives the entire drive assembly to output torque and start the fan blades to rotate to emit a wind alarm.

[0054] Referring to Figures 6-7, a third toothed groove 41 is provided at one end of the fan blade seat 4. The third toothed groove 41 is fitted onto the other end of the gear column 32, and the fan blade seat 4 and the gear column 32 rotate synchronously through gear transmission. The outer surface of the fan blade seat 4 is provided with blades 42 at equal intervals along its axis and wind direction. During the rotation, multiple blades 42 can stir up the surrounding air to form a high-pressure airflow. This airflow forms a resonance cavity effect inside the wind box 5 and emits a high-intensity wind noise through the wind window 52, ​​thereby alerting the construction site personnel to the possibility of fire.

[0055] Referring to Figures 6-7, the bellows 5 is a cylindrical cavity with one open end, which has a good airflow guiding structure, facilitating the high-speed rotation of the fan blade seat 4 to drive airflow; a second positioning hole 51 is provided through one end of the bellows 5, which is used to cooperate with the bottom cover 12 of the gearbox 1 for positioning and fixing the overall structure; the outer side of the bellows 5 has air windows 52 that are equally spaced around its axis, and the number and spacing of the air windows 52 are optimized according to the sound wave resonance effect to improve the propagation range and penetration of the alarm sound; a positioning frame 53 is provided at the open end of the bellows 5, which is used to reset the drive rod 23 when not in use and to provide support and stability to the overall structure when the device is stored.

[0056] The working principle of this utility model is as follows:

[0057] When in use, if a fire is discovered at the construction site, it can be taken out of the storage bag, then hold the outside of the box 11 with one hand and the handle 24 with the other hand, and pull the handle 24 outward. The positioning block 22 slides in the guide groove 231. When the positioning block 22 slides to one end of the drive rod 23, then shake the handle 24 to drive the drive rod 23 to rotate, which in turn drives the drive disc 21 to rotate.

[0058] The drive disc 21 is fitted onto one end of the gear column 32, thereby causing the gear column 32 to rotate synchronously;

[0059] The fan blade seat 4 is connected to the other end of the gear column 32, so that the fan blade seat 4 rotates synchronously with the gear column 32. When the fan blade seat 4 rotates, the high-speed airflow brought up by the blade 42 will flow out of the wind window 52, ​​thereby emitting a wind alarm sound.

[0060] When not in use, the drive lever 23 needs to be pushed back to its initial position to reduce the space occupied by the drive lever 23 when storing it.

[0061] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A portable fire alarm device for construction sites, characterized in that: The gearbox (1) includes a gear assembly (3) inside the gearbox (1) and a drive assembly (2) at the other end of the gearbox (1). The drive assembly (2) is used to drive the gear assembly (3) inside the gearbox (1) to rotate. A fan blade seat (4) is provided at the output end of the gear assembly (3). A bellows (5) is provided at one end of the gearbox (1). The fan blade seat (4) is located inside the bellows (5). When the fan blade seat (4) rotates inside the bellows (5), a wind alarm sound can be generated.

2. The portable construction site fire alarm device according to claim 1, characterized in that: The gearbox (1) includes a housing (11), and a first tooth groove (111) is provided on the inner side wall of the housing (11); both ends of the housing (11) are provided with bottom covers (12), and a first positioning hole (121) is provided through the bottom cover (12); a top cover (13) is provided at one end of the housing (11).

3. A portable construction site fire alarm device according to claim 2, characterized in that: The gear assembly (3) includes a positioning shaft (31), a gear column (32) is sleeved on the positioning shaft (31), and mounting discs (33) are sleeved on the gear column (32) at equal intervals along its height direction. A pin hole (331) is opened through the mounting disc (33), and an auxiliary gear (34) is connected to the pin hole (331). The auxiliary gear (34) meshes with the gear column (32) and the housing (11) respectively.

4. A portable construction site fire alarm device according to claim 3, characterized in that: The drive assembly (2) includes a drive disk (21), a second toothed groove (211) is provided through the side of the drive disk (21), and a positioning groove (221) is sleeved on one end of the gear column (32); a mounting base (212) is fixedly connected to one side of the drive disk (21), a positioning block (22) is provided on the mounting base (212), and a drive rod (23) is slidably connected to the positioning block (22).

5. A portable construction site fire alarm device according to claim 4, characterized in that: Positioning slots (221) are provided on both sides of the positioning block (22); a guide slot (231) is provided through the upper end face of the drive rod (23), and the positioning block (22) is located in the guide slot (231); positioning strips (232) are fixedly connected to the opposing surfaces inside the guide slot (231), and the positioning strips (232) are engaged in the positioning slot (221); a handle (24) is rotatably connected above one end of the drive rod (23).

6. A portable construction site fire alarm device according to claim 4, characterized in that: The wind turbine seat (4) has a third tooth groove (41) at one end, and the third tooth groove (41) is sleeved on the other end of the gear column (32). The outer side of the wind turbine seat (4) is provided with blades (42) at equal intervals along its axis and wind direction.

7. A portable construction site fire alarm device according to claim 1, characterized in that: The bellows (5) is configured as a cylindrical cavity with one end open, and a second positioning hole (51) is provided through one end of the bellows (5). The outer side of the bellows (5) is provided with wind windows (52) at equal intervals around its axis. A positioning frame (53) is provided at the open end of the bellows (5).

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