Fire damper valve comprising a sealing baffle assembly

Abstract

The utility model provides a kind of sealing baffle assembly and fire damper comprising it, sealing baffle assembly is installed in the outer frame of fire damper, sealing baffle assembly includes sealing piece, elastic sealing sheet, sealing piece is fixed on the inner circumferential surface of outer frame, sealing piece is equipped with the sealing baffle extending to outer frame, the surface of sealing baffle facing blade is baffle sealing surface;Elastic sealing sheet is bent and forms fixed section and elastic sealing section, fixed section is closer to outer frame relative to elastic sealing section, fixed section is fixed on baffle sealing surface, elastic sealing section is made of elastic metal material, the distance between elastic sealing section and baffle sealing surface gradually increases along the direction away from outer frame.Elastic sealing section and the edge between blade can achieve excellent sealing effect, ensure the sealing performance of fire damper;Meanwhile, the elastic sealing section made of elastic metal material, after being heated, still cannot be deformed under 300Pa pressure, can still ensure the sealing performance of fire damper under high temperature state.

Description

Technical Field

[0001] This utility model relates to a sealing baffle assembly and a fire valve containing the same. Background Technology

[0002] With the release of new standards for fire dampers used in building ventilation and smoke exhaust systems, the requirements for fire dampers have been raised, especially regarding the air leakage rate under ambient temperature and the smoke leakage rate under fire resistance conditions. Previously, the requirement was that the air leakage rate per unit area should not exceed 500 m³ when maintaining a static pressure difference of 300 Pa across the blades. 3 / (m 2 .h) increased to 300m 3 / (m 2 .h).

[0003] Existing fire dampers use baffles on the outer frame to prevent gaps between the last blade and the outer frame when the blades are closed. However, due to the harsh working environment of fire dampers, the contact surfaces of the baffles or blades often warp or twist, creating gaps between the blades and the baffles, leading to significant air leakage. Especially in high-temperature environments, the blades and baffles deform due to heat, widening the gaps and failing to meet the system's requirements for smoke leakage. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defect of poor sealing effect of fire dampers in the prior art under high temperature environment, and to provide a sealing baffle assembly and a fire damper including the baffle assembly.

[0005] This utility model solves the above-mentioned technical problems through the following technical solutions:

[0006] This utility model provides a sealing baffle assembly, which is installed inside the outer frame of a fire damper. The sealing baffle assembly includes a sealing stop and an elastic sealing sheet. The sealing stop is fixed to the inner circumferential surface of the outer frame and has a sealing baffle extending into the outer frame. The surface of the sealing baffle facing the blade is the baffle sealing surface. The elastic sealing sheet is bent to form a fixed section and an elastic sealing section. The fixed section is closer to the outer frame than the elastic sealing section and is fixed to the baffle sealing surface. The elastic sealing section is made of an elastic metal material, and the distance between the elastic sealing section and the baffle sealing surface gradually increases in the direction away from the outer frame.

[0007] In this technical solution, the elasticity of the metal material in the elastic sealing section ensures that the elastic sealing section can press against the blade after being compressed, thus guaranteeing the seal between the elastic sealing section and the blade. When the fire damper closes instantly, the blade impacts the elastic sealing section, and the elastic buffering force of the elastic sealing section reduces the rebound force of the blade, preventing the blade from jamming. When the fire damper undergoes fire resistance testing or is under high temperature conditions, the elastic sealing section made of elastic metal material will not deform under 300Pa pressure after being heated, maintaining the sealing effect between the elastic sealing section and the blade.

[0008] Preferably, the sealing baffle assembly further includes a sealing strip, and the fixing section is sandwiched between the sealing strip and the sealing baffle.

[0009] In this technical solution, the sealing strip covers the surface of the fixed section and applies uniform pressure to the fixed section, so that the fixed section is firmly attached to the sealing surface of the sealing baffle.

[0010] Preferably, the sealing baffle assembly further includes a plurality of blind rivets, which penetrate the sealing strip, the fixing section, and the sealing baffle, and press the sealing strip, the fixing section, and the sealing baffle together.

[0011] In this technical solution, the core-pulling rivet firmly clamps and fixes the three components—the sealing strip, the fixing section, and the sealing baffle—together, providing strong resistance to shearing and pulling forces, and ensuring that these three components will not move, separate, or become misaligned during subsequent use.

[0012] Preferably, the elastic sealing sheet is made of stainless steel and has a thickness of 0.1 mm to 1 mm.

[0013] In this technical solution, the above-mentioned settings ensure that the elastic force of the elastic sealing sheet meets the sealing requirements of the blade, while also guaranteeing that the elastic sealing sheet can be formed by pressing and the overall strength of the elastic sealing sheet after it is fixed to the sealing baffle.

[0014] Preferably, the angle between the elastic sealing section and the baffle sealing surface is 10° to 45°.

[0015] In this technical solution, the aforementioned angle setting ensures that the elastic force of the elastic sealing sheet meets the sealing requirements of the blade while also overcoming the rebound force of the blade.

[0016] Preferably, the outer edge of the sealing baffle away from the outer frame is the first outer edge; the edge of the elastic sealing sheet away from the outer frame is the second outer edge; the second outer edge is closer to the inner circumferential surface of the outer frame than the first outer edge.

[0017] In this technical solution, the height of the elastic sealing sheet is slightly lower than that of the sealing baffle; when the fire damper is opened, the airflow will not move the elastic sealing sheet due to the obstruction of the sealing baffle, and the elastic sealing sheet will not generate noise.

[0018] Preferably, the sealing baffle further includes a fixing base plate, which is integrally formed with the sealing baffle. The fixing base plate is attached to the inner circumferential surface of the outer frame and fixed to the outer frame. The fixing base plate and the sealing baffle are perpendicular to each other.

[0019] In this technical solution, a fixed base plate and a sealing baffle are formed by an integrally molded sealing baffle. When the fixed base plate is fixed to the outer frame, the sealing baffle is perpendicular to the outer frame, ensuring a tight fit between the blade and the elastic sealing section.

[0020] This utility model also provides a fire damper, including an outer frame, side blades, and a sealing baffle assembly. The side blades are installed inside the outer frame and can rotate around the rotation axis of the side blades. The sealing baffle assembly is installed on the inner circumferential surface of the outer frame, and the sealing baffle assembly is as described in the above technical solution. When the side blades rotate to the closed position, the side blades can abut against the elastic sealing sheet and form a seal.

[0021] In this technical solution, when the side blade rotates to the sealed position, the side blade abuts against the elastic sealing section, slightly pressing the elastic sealing section towards the sealing baffle, thereby achieving the best sealing effect between the side blade and the elastic sealing section, ensuring the sealing performance of the fire damper even at high temperatures.

[0022] Preferably, the edge of the elastic sealing sheet away from the outer frame is the second outer edge; the second outer edge, the edge of the side blade near the outer frame, and the rotation axis of the side blade are parallel to each other.

[0023] In this technical solution, when the edge blades and the elastic sealing section are in contact, the overlapping area of ​​each section is approximately the same, and the elastic sealing section is subjected to uniform force, thereby achieving a comprehensive and seamless seal.

[0024] Preferably, the edge blade is formed by pressing a sheet metal, and a ridge is formed in the middle of the edge blade. The extension direction of the ridge is parallel to the rotation axis of the edge blade, and the protrusion direction of the ridge is set in a direction away from the sealing baffle assembly.

[0025] In this technical solution, the raised strip can enhance the overall strength of the edge blade; and by setting the protruding direction of the raised strip to be away from the direction of the sealing baffle assembly, the edge blade can generate a strong pressure towards the elastic sealing sheet when it comes into contact with the elastic sealing sheet.

[0026] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0027] The positive and progressive effects of this utility model are as follows:

[0028] The aforementioned sealing baffle assembly and the fire damper containing it are provided with a sealing baffle assembly on the outer frame of the fire damper. The sealing baffle assembly uses an elastic sealing section made of elastic metal material. The elastic sealing section can achieve an excellent sealing effect with the edge of the blade, ensuring the sealing performance of the fire damper. At the same time, the elastic sealing section made of elastic metal material will not deform under 300Pa pressure after being heated, and can still ensure the sealing performance of the fire damper under high temperature conditions. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the fireproof valve of this utility model.

[0030] Figure 2 for Figure 1 The diagram shows the structural schematic of the sealing baffle assembly of the fire damper.

[0031] Figure 3 for Figure 1 The diagram shows the assembly of the sealing baffle and the blades of the fire damper.

[0032] Figure 4 for Figure 1 The diagram shows a cross-sectional view of the fire damper.

[0033] Explanation of reference numerals in the attached figures

[0034] Outer frame 100

[0035] Middle blades 200

[0036] Edge blades 300

[0037] Raised strip 301

[0038] Sealing baffle assembly 400

[0039] Sealing element 1

[0040] Sealing baffle 11

[0041] baffle sealing surface 12

[0042] First outer edge 13

[0043] Fixed base plate 14

[0044] Elastic sealing sheet 2

[0045] Fixed section 21

[0046] Elastic sealing section 22

[0047] Second outer edge 23

[0048] Sealing strip 3

[0049] 4 pop rivets Detailed Implementation

[0050] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0051] like Figure 1 As shown, the fire damper includes an outer frame 100, a middle blade 200, and two side blades 300. The two side blades 300 are located above and below the middle blade 200, respectively. Both the middle blade 200 and the side blades 300 can rotate around their own rotation axis.

[0052] When this fire damper is installed in ducts used for ventilation or smoke extraction, the outer frame 100 seals against the inner circumference of the duct. When airflow is required, the middle blade 200 and the side blades 300 rotate to a separated position, forming an airflow path between them, allowing air to pass through both sides of the fire damper. When airflow is required, the middle blade 200 and the side blades 300 rotate to an overlapping position, creating a seal and isolating the air on both sides of the fire damper.

[0053] To ensure a tight seal, in addition to ensuring a seal at the overlap of the middle blade 200 and the side blades 300, it is also necessary to ensure a seal at the overlap between the side blades 300 and the outer frame 100. Therefore, the fire damper also includes a sealing baffle assembly 400, which is installed on the inner circumferential surface of the outer frame 100. When the side blades 300 rotate to the closed position, they can abut against the sealing baffle assembly 400 and form a seal, ensuring a tight seal between the side blades 300 and the outer frame 100.

[0054] like Figures 2-3 As shown, the sealing baffle assembly 400 includes a sealing baffle 1 and an elastic sealing sheet 2. The sealing baffle 1 is fixed on the inner circumferential surface of the outer frame 100. The sealing baffle 11 extends into the outer frame 100. The surface of the sealing baffle 11 facing the edge blade 300 is the baffle sealing surface 12. The elastic sealing sheet 2 is bent to form a fixed section 21 and an elastic sealing section 22. The fixed section 21 is closer to the outer frame 100 than the elastic sealing section 22. The fixed section 21 is fixed on the baffle sealing surface 12. The elastic sealing section 22 is made of elastic metal material. The distance between the elastic sealing section 22 and the baffle sealing surface 12 gradually increases in the direction away from the outer frame 100.

[0055] When the side blade 300 rotates to the sealed position, the side blade 300 abuts against the elastic sealing section 22, slightly pressing the elastic sealing section 22 towards the sealing baffle 11, so that the sealing effect between the side blade 300 and the elastic sealing section 22 reaches the best.

[0056] The elastic sealing section 22 is made of an elastic metal material. The elasticity of the metal material in the elastic sealing section 22 ensures that it can press against the edge blade 300 after being compressed, guaranteeing the seal between the elastic sealing section 22 and the edge blade 300. When the fire damper closes instantly, the edge blade 300 impacts the elastic sealing section 22, and the elastic buffering force of the elastic sealing section 22 reduces the rebound force of the edge blade 300, preventing it from jamming. When the fire damper undergoes a fire resistance test or operates at high temperatures, the elastic sealing section 22, made of elastic metal material, will not deform under a pressure of 300 Pa after being heated, maintaining the sealing effect between the elastic sealing section 22 and the edge blade 300.

[0057] The sealing baffle assembly 400 also includes a sealing strip 3, with the fixing section 21 sandwiched between the sealing strip 3 and the sealing baffle 11. The sealing strip 3 covers the surface of the fixing section 21, applying uniform pressure to the fixing section 21 so that the fixing section 21 is firmly attached to the baffle sealing surface 12 of the sealing baffle 11.

[0058] The sealing baffle assembly 400 also includes several blind rivets 4, which penetrate the sealing strip 3, the fixing section 21, and the sealing baffle 11, pressing them together. During installation, the core rod of the blind rivet 4 is pulled by a rivet gun, causing the tail of the blind rivet 4 to expand and deform, forming a "bulge" or "flower" shape, thereby firmly clamping and fixing the three components—the sealing strip 3, the fixing section 21, and the sealing baffle 11—together. The blind rivets 4 provide strong shear and pull-out resistance, ensuring that the sealing strip 3, the fixing section 21, and the sealing baffle 11 will not move, separate, or misalign during subsequent use.

[0059] The elastic sealing sheet 2 is made of stainless steel and has a thickness of 0.1mm to 1mm. This design ensures that the elastic force of the elastic sealing sheet 2 meets the sealing requirements of the edge blade 300, while also guaranteeing that the elastic sealing sheet 2 can be formed through pressing and that the overall strength of the elastic sealing sheet 2 after it is fixed to the sealing baffle 11 is sufficient. Of course, in other embodiments, the elastic sealing sheet 2 can also be made of other materials, such as stainless steel, galvanized steel sheet, aluminized sheet, aluminized zinc sheet, or cold-rolled sheet.

[0060] The angle between the elastic sealing section 22 and the baffle sealing surface 11 is 10° to 45°, which allows the elastic force of the elastic sealing sheet 2 to meet the sealing requirements of the side blade 300 while also meeting the requirements to overcome the rebound force of the side blade 300.

[0061] The outer edge of the sealing baffle 11 furthest from the outer frame 100 is the first outer edge 13; the edge of the elastic sealing sheet 2 furthest from the outer frame 100 is the second outer edge 23. The second outer edge 23 is closer to the inner circumference of the outer frame 100 than the first outer edge 13, making the height of the elastic sealing sheet 2 slightly lower than that of the sealing baffle 11. When the fire damper is opened, the airflow will not move the elastic sealing sheet 2 due to the obstruction of the sealing baffle 11, and the elastic sealing sheet 2 will not generate noise.

[0062] The sealing element 1 further includes a fixing base plate 14, which is integrally formed with the sealing baffle 11. The fixing base plate 14 is attached to the inner circumferential surface of the outer frame 100 and fixed to the outer frame 100. The fixing base plate 14 and the sealing baffle 11 are perpendicular to each other. The integrally formed sealing element 1 creates a perpendicular fixing base plate 14 and sealing baffle 11. When the fixing base plate 14 is fixed to the outer frame 100, the sealing baffle 11 is perpendicular to the outer frame 100, ensuring a tight fit between the edge blade 300 and the elastic sealing section 22.

[0063] like Figure 3 As shown, the second outer edge 23 of the elastic sealing sheet 2, the edge of the side blade 300 near the outer frame 100, and the rotation axis of the side blade 300 are parallel to each other, so that when the side blade 300 is in contact with the elastic sealing section 22, the overlapping area of ​​each section is approximately the same, and the elastic sealing section 22 is subjected to uniform force, thereby achieving a comprehensive and dead-angle-free seal.

[0064] like Figure 3 and Figure 4 As shown, the edge blade 300 is formed by pressing sheet metal. A protrusion 301 is formed in the middle of the edge blade 300. The extension direction of the protrusion 301 is parallel to the rotation axis of the edge blade 300, and the protrusion direction of the protrusion 301 is set in a direction away from the sealing baffle assembly 400. The protrusion 301 can enhance the overall strength of the edge blade 300; and by setting the protrusion direction of the protrusion 301 away from the sealing baffle assembly 400, the edge blade 300 can generate a strong pressure towards the elastic sealing sheet 2 when it comes into contact with the elastic sealing sheet 2.

[0065] like Figure 4As shown, in this embodiment, the fire damper has two sealing baffle assemblies 400. The two sealing baffle assemblies 400 are respectively installed above and below the outer frame 100. The upper edge blade 300 is in a sealing fit with the upper sealing baffle assembly 400, and the lower edge blade 300 is in a sealing fit with the lower sealing baffle assembly 400. In other embodiments, the number and installation position of the sealing baffle assemblies 400 can be adaptively adjusted according to the blade installation position.

[0066] The aforementioned sealing baffle assembly and the fire damper containing it are provided with a sealing baffle assembly on the outer frame of the fire damper. The sealing baffle assembly uses an elastic sealing section made of elastic metal material. The elastic sealing section can achieve an excellent sealing effect with the edge of the blade, ensuring the sealing performance of the fire damper. At the same time, the elastic sealing section made of elastic metal material will not deform under 300Pa pressure after being heated, and can still ensure the sealing performance of the fire damper under high temperature conditions.

[0067] This utility model is not limited to the above-described embodiments. Any changes in its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A sealing baffle assembly, wherein the sealing baffle assembly is installed within the outer frame of a fire damper, characterized in that, The sealing baffle assembly includes: A sealing element is fixed to the inner circumferential surface of the outer frame. The sealing element is provided with a sealing baffle extending into the outer frame. The surface of the sealing baffle facing the blade is the baffle sealing surface. An elastic sealing sheet is formed by bending the elastic sealing sheet into a fixed section and an elastic sealing section. The fixed section is closer to the outer frame than the elastic sealing section. The fixed section is fixed to the sealing surface of the baffle. The elastic sealing section is made of elastic metal material. The distance between the elastic sealing section and the sealing surface of the baffle gradually increases in the direction away from the outer frame.

2. The sealing baffle assembly as claimed in claim 1, characterized in that: The sealing baffle assembly also includes a sealing strip, and the fixing section is sandwiched between the sealing strip and the sealing baffle.

3. The sealing baffle assembly as described in claim 2, characterized in that: The sealing baffle assembly also includes a number of pull rivets, which penetrate the sealing strip, the fixing section, and the sealing baffle, and press the sealing strip, the fixing section, and the sealing baffle together.

4. The sealing baffle assembly as claimed in claim 1, characterized in that: The elastic sealing sheet is made of stainless steel and has a thickness of 0.1 mm to 1 mm.

5. The sealing baffle assembly as claimed in claim 1, characterized in that: The angle between the elastic sealing section and the baffle sealing surface is 10° to 45°.

6. The sealing baffle assembly as claimed in claim 1, characterized in that: The outer edge of the sealing baffle away from the outer frame is the first outer edge; the edge of the elastic sealing sheet away from the outer frame is the second outer edge; the second outer edge is closer to the inner circumferential surface of the outer frame than the first outer edge.

7. The sealing baffle assembly as claimed in claim 1, characterized in that: The sealing baffle also includes a fixing base plate, which is integrally formed with the sealing baffle. The fixing base plate is attached to the inner circumferential surface of the outer frame and fixed to the outer frame. The fixing base plate and the sealing baffle are perpendicular to each other.

8. A fire damper, characterized in that, include: Outer frame; Side blades, which are installed inside the outer frame and are rotatable about the rotation axis of the side blades; A sealing baffle assembly is installed on the inner circumferential surface of the outer frame, as described in any one of claims 1 to 7; when the side blade is rotated to the sealed position, the side blade can abut against the elastic sealing sheet and form a seal.

9. The fire damper as described in claim 8, characterized in that: The edge of the elastic sealing sheet away from the outer frame is the second outer edge; the second outer edge, the edge of the side blade near the outer frame, and the rotation axis of the side blade are parallel to each other.

10. The fire damper as described in claim 8, characterized in that: The edge blade is formed by pressing a sheet metal, and a ridge is formed in the middle of the edge blade. The extension direction of the ridge is parallel to the rotation axis of the edge blade, and the protrusion direction of the ridge is set in a direction away from the sealing baffle assembly.

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