Fire ventilation device

Abstract

This utility model relates to the field of fire ventilation technology, and solves the problem that with the increase of usage time, some dust remains on the surface of the protective cover, blocking the ventilation holes and affecting ventilation efficiency. Furthermore, some dust remains on the inner wall, causing inconvenience for later cleaning and further affecting the ventilation quality of the duct. Specifically, it is a fire ventilation device, including a duct. A fan is installed inside one end of the duct, and a dustproof net is installed at the other end. A threaded cylinder is fixedly connected to the back of the fan. A threaded rod is threadedly connected inside the threaded cylinder. One end of the threaded rod is provided with a connector and a cross plate. The cross plate has symmetrically formed grooves at its four corners and a connecting strip embedded inside. A flexible scraper is installed inside the connecting strip and contacts the dustproof net. An electric telescopic rod is provided on the side of the duct, and an arc-shaped groove is formed at its telescopic end. A clamping plate assembly is provided in the middle of the side of the duct, and a fixed plate is movably connected inside it.

Description

Technical Field

[0001] This utility model relates to the field of fire ventilation technology, specifically a fire ventilation device. Background Technology

[0002] The indoor fire ventilation device disclosed in CN222865131U includes a ventilation duct, an air inlet of the ventilation duct is provided with an air intake mechanism, an air outlet at the end of the ventilation duct away from the air intake mechanism is detachably connected with a second louvered fan, an installation groove is provided at the lower end of the ventilation duct near the air intake mechanism, a filter mechanism is provided inside the installation groove, and a smoke exhaust mechanism is provided inside the ventilation duct and on the side of the filter mechanism away from the air intake mechanism.

[0003] Its filtration mechanism is designed so that when a fire occurs, the smoke is discharged through the ventilation duct, and the filtration mechanism can filter the dust and impurities in the discharged smoke, thereby reducing environmental pollution.

[0004] However, as the usage time increases, some dust remains on the surface of the protective cover, blocking the ventilation holes and affecting the ventilation efficiency. Some dust also remains on the inner wall, which not only makes it inconvenient to clean later, but also further affects the ventilation quality of the pipeline. This solution is not very efficient for the ventilation of fire protection pipelines. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a fire ventilation device that solves the problem that, with increasing usage time, some dust remains on the surface of the protective cover, clogging the ventilation holes and affecting ventilation efficiency. Furthermore, some dust remains on the inner wall, causing inconvenience for later cleaning and further affecting the ventilation quality of the duct.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fire ventilation device, comprising a duct, a fan installed inside one end of the duct and a dustproof net installed at the other end, a threaded cylinder fixedly connected to the back of the fan, a threaded rod threadedly connected inside the threaded cylinder, a connector and a cross plate installed at one end of the threaded rod, symmetrically recessed grooves on the four corners of the cross plate and a connecting strip embedded inside, a flexible scraper installed inside the connecting strip and in contact with the dustproof net; an electric telescopic rod installed on the side of the duct with an arc-shaped groove at its telescopic end, a clamping plate assembly installed in the middle of the side of the duct and a fixed plate movably connected inside it, an elastic rubber hammer and a spring installed at one end of the fixed plate and an arc-shaped locking block installed at the other end, one end of the spring fixed to the surface of the duct, and the arc-shaped locking block adapted to the arc-shaped groove.

[0007] In one specific embodiment, the flexible scraper is made of silicone and has a wavy cross-section, and its surface covers the entire area of ​​the dustproof net in contact with the dustproof net.

[0008] In one specific embodiment, the arcuate groove of the electric telescopic rod has the same curvature as the surface curvature of the arcuate clamping block, and the clamping plate assembly is hinged to the fixing plate via a rotating shaft.

[0009] In one specific embodiment, the inner wall of the threaded cylinder is provided with a trapezoidal thread that matches the threaded rod, and the rotation axis of the cross plate is coaxial with the fan axis.

[0010] In one specific embodiment, the hammerhead of the elastic rubber hammer is made of high-temperature resistant rubber, and its contact surface with the inner wall of the air duct is provided with a protrusion array.

[0011] In one specific embodiment, the springs are arranged in pairs with opposite spirals, and their free length is greater than one-third of the duct diameter and their compression stroke is adapted to the reciprocating range of the arc-shaped locking block.

[0012] Compared with the prior art, the present invention provides a fire ventilation device with the following advantages:

[0013] In the technical solution disclosed in this utility model, the linkage structure design of the fan-driven threaded cylinder and threaded rod, through which the spiral transmission of the threaded rod and threaded cylinder converts the rotation of the fan into the rotation of the cross plate, and the wavy cross section of the silicone scraper enhances the dust removal contact area, realizing the automatic cleaning function of the dust screen and solving the problem of easy clogging of the dust screen in traditional fire ventilation devices. When the fan rotates, the threaded transmission drives the cross plate to rotate, and the flexible scraper removes dust from the surface of the dust screen, improving ventilation efficiency. Through the vibration linkage design of the electric telescopic rod and the elastic rubber hammer, the function of removing accumulated dust from the inner wall of the air duct is realized, solving the problem of reduced ventilation quality caused by dust adhesion. When the electric telescopic rod extends and retracts, the arc groove moves the arc-shaped locking block, and the spring rebound drives the elastic rubber hammer to strike the inner wall at high frequency, improving cleaning efficiency. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the duct structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the cross-shaped plate structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the electric telescopic pole structure of this utility model.

[0019] In the diagram: 1. Air duct; 2. Fan; 3. Dustproof net; 4. Threaded cylinder; 5. Threaded rod; 6. Connector; 7. Cross plate; 8. Embedded groove; 9. Connecting strip; 10. Flexible scraper; 11. Electric telescopic rod; 12. Arc-shaped groove; 13. Clamping plate assembly; 14. Fixing plate; 15. Elastic rubber hammer; 16. Spring; 17. Arc-shaped locking block. Detailed Implementation

[0020] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0021] Figures 1-4 In one embodiment of this utility model, a fire ventilation device includes a duct 1. A fan 2 is installed inside one end of the duct 1 and a dustproof net 3 is installed at the other end. A threaded cylinder 4 is fixedly connected to the back of the fan 2. A threaded rod 5 is threadedly connected inside the threaded cylinder 4. A connector 6 and a cross plate 7 are provided at one end of the threaded rod 5. The cross plate 7 has symmetrically provided grooves 8 at the four corners of its surface and a connecting strip 9 is embedded inside. A flexible scraper 10 is provided inside the connecting strip 9 and contacts the dustproof net 3. An electric telescopic rod 11 is provided on the side of the duct 1 and an arc-shaped groove 12 is provided at its telescopic end. A clamping plate group 13 is provided in the middle of the side of the duct 1 and a fixed plate 14 is movably connected inside it. An elastic rubber hammer 15 and a spring 16 are provided at one end of the fixed plate 14 and an arc-shaped locking block 17 is provided at the other end. One end of the spring 16 is fixed to the surface of the duct 1, and the arc-shaped locking block 17 is adapted to the arc-shaped groove 12.

[0022] The specific problem addressed in this embodiment is that, with increasing usage time, some dust remains on the surface of the protective cover, clogging the ventilation holes and affecting ventilation efficiency. Furthermore, some dust remains on the inner wall, causing inconvenience for later cleaning and further impacting the ventilation quality of the duct. This invention utilizes a linkage structure design between the fan 2 driving the threaded cylinder 4 and the threaded rod 5. The helical transmission of the threaded rod 5 and the threaded cylinder 4 converts the rotation of the fan 2 into the rotation of the cross plate 7. The wavy cross-section silicone scraper enhances the dust removal contact area, achieving automatic cleaning of the dustproof net 3 and solving the problem of easy clogging of the dustproof net 3 in traditional fire ventilation devices. When the fan 2 rotates, the threaded transmission drives the cross plate 7 to rotate, and the flexible scraper 10 scrapes away dust from the surface of the dustproof net 3, improving ventilation efficiency. Through the vibration linkage design of the electric telescopic rod 11 and the elastic rubber hammer 15, the function of removing accumulated dust from the inner wall of the duct 1 is realized, solving the problem of reduced ventilation quality due to dust adhesion. When the electric telescopic rod 11 extends or retracts, the arc-shaped groove 12 moves the arc-shaped locking block 17, and the spring 16 rebounds, causing the elastic rubber hammer 15 to strike the inner wall at high frequency, improving cleaning efficiency.

[0023] When the fan 2 rotates, the cross plate 7 is driven to rotate through the threaded transmission of the threaded cylinder 4 and the threaded rod 5. The flexible scrapers 10 at the four corners scrape the surface of the dustproof net 3 to clean the dust. At the same time, the extension end of the electric telescopic rod 11 moves the arc-shaped locking block 17 through the arc-shaped groove 12. The spring 16 rebounds and drives the fixed plate 14 to swing. The elastic rubber hammer 15 knocks the inner wall of the air duct 1 at high frequency to shake off the accumulated dust. The flexible scraper 10 and the elastic rubber hammer 15 work together to achieve double cleaning of the dustproof net 3 and the inner wall of the air duct 1, improve ventilation efficiency, and automate the dust removal to reduce the need for manual maintenance.

[0024] In this specific embodiment, the flexible scraper 10 is made of silicone and has a wavy cross-section, and its surface covers the entire area of ​​the dustproof net 3 in contact with the dustproof net 3.

[0025] The flexible scraper 10 is made of silicone and has a wavy cross-section. Its surface is fully attached to the dustproof mesh 3. The wavy structure enhances the dust removal effect when scraping.

[0026] In this specific embodiment, the arc of the arc groove 12 of the electric telescopic rod 11 is consistent with the surface curvature of the arc-shaped locking block 17, and the clamping plate group 13 is hinged to the fixing plate 14 through the rotating shaft;

[0027] The arc-shaped groove 12 of the electric telescopic rod 11 is perfectly matched with the curvature of the arc-shaped locking block 17, and the clamping plate group 13 is hinged to the fixing plate 14 through the pivot to ensure smooth swing when moving.

[0028] In this specific embodiment, the inner wall of the threaded cylinder 4 is provided with a trapezoidal thread that matches the threaded rod 5, and the rotation axis of the cross plate 7 is coaxial with the axis of the fan 2;

[0029] The inner wall of the threaded cylinder 4 is provided with a trapezoidal thread that precisely meshes with the threaded rod 5. The rotation axis of the cross plate 7 is coaxial with that of the fan 2, ensuring that the torque transmission is unbiased.

[0030] In this specific embodiment, the hammer head of the elastic rubber hammer 15 is made of high-temperature resistant rubber, and a protrusion array is provided on the contact surface between the hammer head and the inner wall of the air duct 1.

[0031] The head of the elastic rubber hammer 15 is made of high-temperature resistant rubber, and its contact surface is set with a convex dot array to enhance the dust removal effect when hitting.

[0032] In this specific embodiment, the springs 16 are arranged in pairs with opposite spirals, and their free length is greater than one-third of the diameter of the air duct 1 and their compression stroke is adapted to the reciprocating range of the arc-shaped locking block 17.

[0033] Spring 16 is arranged in pairs with opposite spirals, its free length is adapted to the diameter of duct 1, and its compression stroke matches the range of the arc-shaped locking block 17 to optimize the vibration amplitude.

[0034] Working principle: The rotation of fan 2 drives the cross plate 7 to rotate through the threaded transmission of threaded cylinder 4 and threaded rod 5. The flexible scrapers 10 at the four corners scrape the dustproof net 3 to remove surface dust. At the same time, the extension end of electric telescopic rod 11 triggers the spring 16 to rebound through arc-shaped groove 12 to push arc-shaped locking block 17. This causes the fixed plate 14 to swing, causing the elastic rubber hammer 15 to strike the inner wall of the air duct 1 at high frequency and shake off the accumulated dust. The trapezoidal threaded transmission ensures stable dust removal power, and the reverse spiral spring 16 cancels the vibration energy. The high-temperature resistant rubber hammer head is suitable for high-temperature fire protection environments.

[0035] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0036] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fire-fighting ventilation device, comprising a duct (1), characterized in that: The air duct (1) has a fan (2) installed inside one end and a dustproof net (3) installed at the other end. The fan (2) is fixedly connected to a threaded cylinder (4) on the back. The threaded cylinder (4) is threadedly connected to a threaded rod (5). One end of the threaded rod (5) is provided with a connector (6) and a cross plate (7). The cross plate (7) has symmetrically provided grooves (8) at the four corners and a connecting strip (9) is embedded inside. The connecting strip (9) is provided with a flexible scraper (10) inside and contacts the dustproof net (3). The air duct (1) is provided with an electric telescopic rod (11) on its side and an arc-shaped groove (12) is opened at its telescopic end. The air duct (1) is provided with a clamping plate group (13) in the middle of its side and a fixed plate (14) is movably connected inside it. One end of the fixed plate (14) is provided with an elastic rubber hammer (15) and a spring (16) and the other end is provided with an arc-shaped locking block (17). One end of the spring (16) is fixed to the surface of the air duct (1) and the arc-shaped locking block (17) is adapted to the arc-shaped groove (12).

2. A fire-fighting ventilation device according to claim 1, characterized in that: The flexible scraper (10) is made of silicone and has a wavy cross-section. Its surface contacts the dustproof net (3) and covers the entire area of ​​the dustproof net (3).

3. A fire-fighting ventilation device according to claim 1, characterized in that: The arc of the arc groove (12) of the electric telescopic rod (11) is consistent with the curvature of the surface of the arc-shaped clamp (17), and the clamping plate group (13) is hinged to the fixing plate (14) through the rotating shaft.

4. A fire-fighting ventilation device according to claim 1, characterized in that: The inner wall of the threaded cylinder (4) is provided with a trapezoidal thread that matches the threaded rod (5), and the rotation axis of the cross plate (7) is coaxial with the axis of the fan (2).

5. A fire-fighting ventilation device according to claim 1, characterized in that: The head of the elastic rubber hammer (15) is made of high-temperature resistant rubber, and a protrusion array is provided on the contact surface between the hammer and the inner wall of the air duct (1).

6. A fire-fighting ventilation device according to claim 1, characterized in that: The springs (16) are arranged in pairs with opposite spirals, and their free length is greater than one-third of the diameter of the air duct (1) and their compression stroke is adapted to the reciprocating range of the arc-shaped card block (17).

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