Smoke exhaust fireproof valve

Abstract

The utility model relates to the field of fire fighting equipment, and discloses a smoke exhaust fireproof valve which comprises a valve body and blades, fixing plates are symmetrically and fixedly connected to the upper end and the lower end in the valve body, two rotating shafts are rotationally installed between the two fixing plates, the blades are installed on the rotating shafts, and a driving assembly used for driving the rotating shafts to rotate is arranged at the top of the valve body. Two positioning assemblies for positioning the two blades are mounted at the top of the valve body; the positioning assembly comprises a fixing cylinder and a fixing block, a vertical rod is installed on the top face of the fixing cylinder in a penetrating mode, a positioning iron block is connected to the bottom of the vertical rod, a limiting plate is fixedly connected to the upper end, in the fixing cylinder, of the vertical rod, a spring arranged on the outer side of the vertical rod in a sleeving mode is arranged below the limiting plate, a positioning hole matched with the positioning iron block is formed in the middle of the fixing block, and a magnetic block is installed in the positioning hole. According to the utility model, the lower part of the positioning iron block moves into the positioning hole through the attraction force of the magnetic block to the positioning iron block, so that the blade is fixed, the blade is effectively prevented from being opened by the impact of the airflow of flue gas, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of fire-fighting equipment, in particular to a smoke exhaust fire damper. Background Art

[0002] Smoke exhaust fire damper is a device used in the fire protection system inside the building. It can automatically close when a fire occurs to prevent the spread of smoke and fire. Smoke exhaust fire damper is usually installed in the ventilation duct or air conditioning system of the building. When a fire occurs, it will close through the signal of the temperature sensing device or fire detector to prevent the spread of smoke to other areas. This equipment plays an important role in ensuring the safety of personnel and reducing property losses.

[0003] During use, it is difficult to ensure the stability of the blade closure when the blade inside the valve body is closed. When the impact force of the smoke airflow on the blade is large, it is easy to cause the blade to rotate and open, posing certain safety hazards. Utility Model Content

[0004] The technical problem to be solved by the utility model is that it is difficult for the existing smoke exhaust fire damper to ensure the stability of the blade closure, and when the impact force of the airflow on the blade is large, it is easy to cause the blade to open.

[0005] In order to solve the above problems, the technical solution of the utility model is: a smoke exhaust fire damper, comprising a valve body and two blades rotatably mounted inside the valve body, wherein fixed plates are symmetrically fixedly connected to the upper and lower ends of the valve body, two rotating shafts are rotatably mounted between the two fixed plates, the blades are mounted on the rotating shafts, the top of the rotating shafts extends to the top of the valve body, a driving assembly for driving the rotating shaft to rotate is provided on the top of the valve body, and two positioning assemblies for positioning the two blades are installed on the top of the valve body, and protective covers are provided on the outer sides of the driving assembly and the positioning assembly;

[0006] The positioning assembly includes a fixed cylinder and a fixed block, a vertical rod is installed through the top surface of the fixed cylinder, the bottom of the vertical rod is connected to a positioning iron block that passes through the bottom surface of the fixed cylinder, the vertical rod is fixedly connected to a limiting plate at the upper end inside the fixed cylinder, a spring is provided below the limiting plate and is sleeved on the outside of the vertical rod, a positioning hole that is compatible with the positioning iron block is opened in the middle of the fixed block, and a magnetic block is installed inside the positioning hole.

[0007] Furthermore, baffles matching with the blades are fixedly connected to both sides of the valve body, and a temperature sensor is installed on the top of the valve body.

[0008] Furthermore, the driving assembly includes a motor installed on the top surface of the protective cover, the output shaft of the motor is connected to a rotating shaft, a slide rail is installed on the inner wall of the protective cover, a T-shaped plate is slidably connected to one side of the slide rail, a rack is connected to one side of the T-shaped plate, and a gear meshing with the rack is installed on the rotating shaft.

[0009] Furthermore, a controller is installed inside the protective cover, and a handle is installed after the top of another rotating shaft passes through the top surface of the protective cover.

[0010] Furthermore, the fixing cylinder is installed through the top surface of the valve body, and the fixing block is installed on the upper part of the side surface of the blade.

[0011] Furthermore, a horizontal plate is fixedly connected to the top of the two vertical rods, a connecting rod penetrating the top surface of the protective cover is fixedly connected to the top of the horizontal plate, and a handle is fixedly connected to the top of the connecting rod.

[0012] Furthermore, a mounting groove is provided inside the fixing block on the side of the positioning hole, and a rubber expansion strip is installed in the mounting groove.

[0013] The advantages of the utility model compared with the existing technology are:

[0014] 1. When the blades of the utility model are closed, the suction force of the magnetic block on the positioning iron block causes the lower part of the positioning iron block to move into the positioning hole, thereby fixing the blades, effectively preventing the blades from being opened by the impact of the flue gas flow, and improving safety.

[0015] 2. The expansion of the rubber expansion strip of the utility model can increase the friction between the positioning iron block and the fixed block, thereby preventing the positioning iron block from leaving the positioning hole due to demagnetization of the magnetic block due to high temperature, thereby further improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a stereogram of the utility model.

[0017] Figure 2 It is a connection structure diagram of the valve body of the utility model.

[0018] Figure 3 This utility model Figure 2 sectional view of .

[0019] Figure 4 It is a cross-sectional view of the positioning assembly of the utility model.

[0020] As shown in the figure: 1. Valve body; 2. Blade; 3. Fixed plate; 4. Rotating shaft; 5. Protective cover; 6. Fixed cylinder; 7. Fixed block; 8. Vertical rod; 9. Positioning iron block; 10. Limit plate; 11. Spring; 12. Magnetic block; 13. Temperature sensor; 14. Motor; 15. Slide rail; 16. T-plate; 17. Rack; 18. Gear; 19. Controller; 20. Handle; 21. Horizontal plate; 22. Connecting rod; 23. Handle; 24. Rubber expansion strip. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] like Figures 1 to 3 As shown, a smoke exhaust fire damper comprises a valve body 1 and two blades 2 rotatably mounted inside the valve body 1, baffles matching the blades 2 are fixedly connected on both sides of the valve body 1, a temperature sensor 13 is installed on the top of the valve body 1, fixing plates 3 are symmetrically fixed at the upper and lower ends of the valve body 1, two rotating shafts 4 are rotatably mounted between the two fixing plates 3, the blades 2 are mounted on the rotating shafts 4, the top of the rotating shafts 4 extends to above the valve body 1, a driving assembly for driving the rotating shaft 4 to rotate is provided on the top of the valve body 1, and a protective cover 5 is provided on the outside of the driving assembly.

[0023] The driving assembly includes a motor 14 installed on the top surface of the protective cover 5, the output shaft of the motor 14 is connected to a rotating shaft 4, a slide rail 15 is installed on the inner wall of the protective cover 5, a T-plate 16 is slidably connected to one side of the slide rail 15, a rack 17 is connected to one side of the T-plate 16, a gear 18 meshing with the rack 17 is installed on the rotating shaft 4, a controller 19 is installed inside the protective cover 5, and a handle 20 is installed on the top of another rotating shaft 4 after passing through the top surface of the protective cover 5.

[0024] The motor 14 drives one shaft 4 to rotate, and the shaft 4 drives the rack 17 and the T-shaped plate 16 to move along the slide rail 15 through the gear 18, and the rack 17 drives the other shaft 4 to rotate through another gear 18, thereby realizing the rotation of the two shafts 4, and the shaft 4 drives the blade 2 to rotate, realizing the closing or opening of the blade 2. Similarly, when the shaft 4 is rotated by the handle 20, the blade 2 can also be closed or opened.

[0025] like Figure 3 and Figure 4As shown, two positioning components for positioning the two blades 2 are installed on the inner side of the protective cover 5 at the top of the valve body 1, and the positioning components include a fixed cylinder 6 and a fixed block 7. The fixed cylinder 6 is installed through the top surface of the valve body 1, and the fixed block 7 is installed on the upper side of the blade 2. A vertical rod 8 is installed through the top surface of the fixed cylinder 6, and a positioning iron block 9 that penetrates the bottom of the vertical rod 8 is connected to the bottom of the fixed cylinder 6. The vertical rod 8 is fixedly connected to a limiting plate 10 at the upper end inside the fixed cylinder 6, and a spring 11 is provided below the limiting plate 10 and is sleeved on the outside of the vertical rod 8. A positioning hole that is compatible with the positioning iron block 9 is opened in the middle of the fixed block 7, and a magnetic block 12 is installed inside the positioning hole. A horizontal plate 21 is fixedly connected to the top of the two vertical rods 8, and a connecting rod 22 that penetrates the top surface of the protective cover 5 is fixedly connected to the top of the horizontal plate 21. A handle 23 is fixedly connected to the top of the connecting rod 22, and an installation groove is opened on the side of the positioning hole inside the fixed block 7, and a rubber expansion strip 24 is installed in the installation groove.

[0026] When the blade 2 is closed, the fixing cylinder 6 moves to the top of the fixing block 7, and the suction force generated by the magnetic block 12 on the positioning iron block 9 causes the lower part of the positioning iron block 9 to move into the positioning hole, thereby fixing the blade 2 and effectively preventing the blade 2 from being opened by the impact of the flue gas airflow, thereby improving safety. When the flue gas temperature is high, the rubber expansion strip 24 expands and fills the gap between the positioning iron block 9 and the positioning hole, effectively increasing the friction between the positioning iron block 9 and the fixing block 7, and preventing the positioning iron block 9 from leaving the positioning hole due to the demagnetization of the magnetic block 12 due to high temperature. When the blade 2 needs to be reset and opened, the connecting rod 22 is pulled upward by the handle 23, and the connecting rod 22 drives the positioning iron block 9 to leave the positioning hole. At this time, the blade 2 can be reset by turning the handle 20.

[0027] In specific use, when the temperature sensor 13 detects that the flue gas temperature reaches 280°C, the motor 14 drives the two blades 2 to rotate to close the blades 2. The suction force generated by the magnetic block 12 on the positioning iron block 9 causes the lower part of the positioning iron block 9 to move into the positioning hole, thereby fixing the blades 2 and effectively preventing the blades 2 from being opened by the impact of the flue gas airflow, thereby improving safety. When the flue gas temperature is high, the rubber expansion strip 24 expands, effectively increasing the friction between the positioning iron block 9 and the fixed block 7, thereby preventing the magnetic block 12 from losing magnetism due to high temperature and causing the positioning iron block 9 to leave the positioning hole, thereby further improving safety. By pulling the connecting rod 22 upward through the handle 23, the connecting rod 22 drives the positioning iron block 9 to leave the positioning hole. At this time, the blade 2 can be reset by turning the handle 20.

[0028] The undisclosed parts in the present invention are all prior art, and their specific structures and working principles are not described in detail.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0031] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A smoke exhaust fire damper, comprising a valve body (1) and two blades (2) rotatably mounted inside the valve body (1), characterized in that: The valve body (1) has fixed plates (3) symmetrically fixed at the upper and lower ends thereof, two rotating shafts (4) are rotatably mounted between the two fixed plates (3), the blades (2) are mounted on the rotating shafts (4), the top of the rotating shafts (4) extends to the top of the valve body (1), a driving assembly for driving the rotating shaft (4) to rotate is provided on the top of the valve body (1), and two positioning assemblies for positioning the two blades (2) are installed on the top of the valve body (1), and a protective cover (5) is provided on the outer side of the driving assembly and the positioning assembly; The positioning assembly comprises a fixed cylinder (6) and a fixed block (7); a vertical rod (8) is installed through the top surface of the fixed cylinder (6); the bottom of the vertical rod (8) is connected to a positioning iron block (9) which passes through the bottom surface of the fixed cylinder (6); the upper end of the vertical rod (8) is fixedly connected to a limiting plate (10) inside the fixed cylinder (6); a spring (11) is provided below the limiting plate (10) and is sleeved on the outside of the vertical rod (8); a positioning hole matched with the positioning iron block (9) is provided in the middle of the fixed block (7); a magnetic block (12) is installed inside the positioning hole.

2. A smoke exhaust fire damper according to claim 1, characterized in that: The valve body (1) has retaining bars fixedly connected to both sides thereof and matched with the blades (2). A temperature sensor (13) is installed at the top of the valve body (1).

3. The smoke exhaust fire damper according to claim 1, characterized in that: The driving assembly comprises a motor (14) mounted on the inner top surface of the protective cover (5), the output shaft of the motor (14) being connected to a rotating shaft (4), a slide rail (15) being mounted on the inner side wall of the protective cover (5), a T-shaped plate (16) being slidably connected to one side of the slide rail (15), a rack (17) being connected to one side of the T-shaped plate (16), and a gear (18) meshing with the rack (17) being mounted on the rotating shaft (4).

4. A smoke exhaust fire damper according to claim 3, characterized in that: A controller (19) is installed inside the protective cover (5), and a handle (20) is installed on the top of the other rotating shaft (4) after passing through the top surface of the protective cover (5).

5. The smoke exhaust fire damper according to claim 1, characterized in that: The fixing cylinder (6) is installed through the top surface of the valve body (1), and the fixing block (7) is installed on the upper part of the side surface of the blade (2).

6. The smoke exhaust fire damper according to claim 5, characterized in that: A transverse plate (21) is fixedly connected to the top of the two vertical rods (8), a connecting rod (22) penetrating the top surface of the protective cover (5) is fixedly connected to the top of the transverse plate (21), and a handle (23) is fixedly connected to the top of the connecting rod (22).

7. The smoke exhaust fire damper according to claim 1, characterized in that: The fixing block (7) is provided with a mounting groove on the side of the positioning hole, and a rubber expansion strip (24) is installed in the mounting groove.

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