High sealing high temperature resistant fire damper

Abstract

The utility model relates to a kind of high sealing high-temperature-resistant fire damper, comprising: valve body and valve piece, multiple are arranged along the valve body height direction array, any two adjacent valve pieces are mutually overlapped, and two valve pieces close to the top and bottom of valve body are all with the abutment of the valve body;The valve piece is provided with thermal expansion sealing strip at the lap joint, and the valve piece includes support plate and two pieces of fireproof plate, both ends of the support plate are rotatably connected with the valve body, and two pieces of the fireproof plate are arranged on the both sides of the support plate.The valve piece in the utility model adopts the composite structure of steel plate and fireproof plate, has good high-temperature resistance and heat insulation performance, avoids valve piece deformation, effectively prevents smoke leakage during fire;Secondly, the thermal expansion sealing strip at the lap joint of valve piece fills the gap between valve piece and valve body, valve piece and valve piece, forms dynamic seal, further guarantees the sealing of entire fire damper, prevents smoke leakage.

Description

Technical Field

[0001] This utility model relates to the field of smoke exhaust fire damper technology, and in particular to a high-sealing, high-temperature resistant fire damper. Background Technology

[0002] Fire dampers are safety control components in building ventilation systems. Their core function is to block the spread of flames and high-temperature smoke through air ducts during a fire, thus preventing the fire from escalating.

[0003] In existing fire dampers, the valve plates are made of galvanized steel sheets, which are directly exposed between the fire-facing and un-fired surfaces. The strength of galvanized steel sheets decreases significantly (>60%) at high temperatures, directly causing the valve plates to deform and lose their original structural shape. On one hand, the deformed valve plates are difficult to fit snugly against the valve body, increasing the sealing gap and leading to smoke leakage. On the other hand, in multi-plate structures, the sealing between valve plates also fails, similarly causing smoke leakage. Furthermore, high temperatures can cause the original sealing materials to carbonize, further exacerbating seal damage. In addition, due to the poor thermal insulation performance of galvanized steel sheets, when the fire-facing surface of the fire damper is exposed to high temperatures, the temperature of the un-fired surface will rise rapidly, causing surrounding flammable materials to ignite and spread the fire. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the defects in the prior art, such as the deformation of valve plates and carbonization of sealing strips caused by high temperature, which leads to a significant increase in the smoke leakage rate of fire dampers and the inability to effectively block the spread of smoke, as well as the temperature of valve plates and valve bodies on the unexposed side rising with the temperature of the fire-facing side.

[0005] To solve the above-mentioned technical problems, this utility model provides a high-sealing, high-temperature resistant fireproof valve, comprising: a valve body and valve plates, wherein multiple valve plates are arranged in an array along the height direction of the valve body, any two adjacent valve plates overlap each other, and the two valve plates near the top and bottom of the valve body abut against the valve body; the valve plates are provided with thermal expansion sealing strips at the overlap points, and the valve plates include a support plate and two fireproof plates, the two ends of the support plate are rotatably connected to the valve body, and the two fireproof plates are disposed on both sides of the support plate.

[0006] In one embodiment of the present invention, the support plate is provided with a rotating shaft along its length axis, and the rotating shaft passes through the valve body.

[0007] In one embodiment of this utility model, the fireproof board is provided with an overlapping bracket on one side along the width direction, and a pair of fireproof boards are symmetrically arranged along the center of the rotating axis.

[0008] In one embodiment of this utility model, a slot is provided on the side of the fireproof board away from the overlapping platform, and one side of the thermal expansion sealing strip is engaged in the slot.

[0009] In one embodiment of this utility model, the pair of fireproof boards and the support plate are detachably connected by bolts.

[0010] In one embodiment of this utility model, the surface of the support plate is provided with a connection hole for bolt engagement.

[0011] In one embodiment of this utility model, the length of the support plate is equal to the width of the valve body.

[0012] In one embodiment of the present invention, a sealing baffle is provided circumferentially on the inner wall of the valve body, and the valve plate abuts against the sealing baffle.

[0013] In one embodiment of this utility model, the cross-section of the valve plate is arc-shaped or wedge-shaped.

[0014] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art: The present invention discloses a high-sealing, high-temperature resistant fire damper. In this invention, the valve plate adopts a composite structure of steel plate and fireproof plate, which has good high-temperature resistance and heat insulation performance, avoids valve plate deformation, and effectively prevents smoke leakage during fire. Secondly, the thermal expansion sealing strip at the valve plate overlap fills the gap between the valve plate and the valve body, and between valve plates, forming a dynamic seal, further ensuring the sealing performance of the entire fire damper and preventing smoke leakage. Attached Figure Description

[0015] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the internal structure of this utility model; Figure 3 for Figure 1 A schematic diagram of the overall structure of the middle valve plate (arc-shaped); Figure 4 for Figure 3 Exploded view of the structure of the middle valve plate; Figure 5 for Figure 1 A schematic diagram of the overall structure of the central valve plate (rhombus shape); Explanation of the reference numerals in the instruction manual: 1. Valve body; 2. Valve plate; 3. Thermal expansion sealing strip; 4. Sealing baffle; 21. Support plate; 22. Fireproof plate; 23. Rotating shaft; 24. Bolt; 211. Connecting hole; 221. Overlapping bracket; 222. Slot. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0017] Reference Figures 1-4 As shown, this utility model discloses a high-sealing, high-temperature resistant fireproof valve, comprising: a valve body 1 and valve plates 2. Multiple valve plates 2 are arranged in an array along the height direction of the valve body 1, and any two adjacent valve plates 2 overlap each other. The two valve plates 2 near the top and bottom of the valve body 1 abut against the valve body 1. A thermal expansion sealing strip 3 is provided at the overlap of the valve plates 2. The valve plates 2 include a support plate 21 and two fireproof plates 22. The two ends of the support plate 21 are rotatably connected to the valve body 1, and the two fireproof plates 22 are arranged on both sides of the support plate 21.

[0018] In this invention, multiple valve plates 2 are disposed inside the valve body 1. These valve plates 2 are louvered, and any two valve plates 2 overlap each other. The rotation of the multiple valve plates 2 controls the opening and closing of the entire valve body 1. Specifically, in this invention, any two valve plates 2 are provided with a thermal expansion sealing strip 3 at the overlap (on both sides of the width direction of the valve plate 2). Preferably, the thermal expansion sealing strip 3 in this invention is an expanded graphite strip. The thermal expansion sealing strip 3 is used to fill the gaps between the valve plate 2 and the valve body 1, and between valve plates 2 themselves, forming a dynamic seal. This provides dual protection of sealing performance at both normal and high temperatures, preventing smoke leakage and simultaneously enhancing the fireproof effect. Furthermore, the porous structure formed by the high-temperature expansion of the expanded graphite strip can also absorb smoke, further ensuring the sealing performance of the entire fireproof valve.

[0019] The valve plate 2 in this utility model adopts a structure of fireproof plate 22-support plate 21-fireproof plate 22. The support plate 21 is made of steel plate, serving as the inner core support of the entire valve plate 2. It has good creep resistance and can maintain good rigidity under high temperature conditions, preventing the entire valve plate 2 from deforming. Secondly, the fireproof plates 22 on both sides of the support plate 21 are made of foam ceramic or microcrystalline perlite. The fireproof plates 22 are compliant fire protection materials that meet the current standards and specifications for relevant fireproof materials. They have good high temperature resistance and heat insulation performance, preventing the valve plate 2 from deforming and effectively preventing smoke leakage during a fire. In addition, the good heat insulation performance can also prevent heat transfer and prevent the temperature of the unexposed surface of the entire fire valve from becoming too high and causing a fire.

[0020] Furthermore, the support plate 21 is provided with a rotating shaft 23 along its length axis, and the rotating shaft 23 passes through the valve body 1.

[0021] Specifically, in this invention, each support plate 21 is provided with a rotating shaft 23, and both ends of the rotating shaft 23 are rotatably connected to the valve body 1 to realize the opening and closing of the valve plate 2. Preferably, multiple rotating shafts 23 are linked together, and driving one rotating shaft 23 to rotate realizes the synchronous rotation of multiple rotating shafts 23, ensuring the synchronous opening and closing of multiple valve plates 2.

[0022] Furthermore, the fireproof board 22 is provided with an overlapping bracket 221 on one side along the width direction, and a pair of fireproof boards 22 are symmetrically arranged along the center of the rotating shaft 23.

[0023] Specifically, a pair of fireproof plates 22 are symmetrically arranged along the center of the rotating shaft 23, that is, the two fireproof plates 22 are arranged oppositely and staggered. Two overlapping brackets 221 are arranged on both sides of the entire valve plate 2, and the opening directions of the two overlapping brackets 221 are opposite, so that the overlapping parts of any two adjacent valve plates 2 interlock with each other to form a boss seal, further improving the sealing performance of the entire fire valve. As a preferred embodiment of this utility model, the shape of the overlapping brackets 221 can be stepped, tenon, or dovetail, effectively ensuring the fit of the valve plates 2 at the overlapping parts, further ensuring the sealing performance of the entire fire valve.

[0024] Furthermore, a slot 222 is provided on the side of the fireproof board 22 away from the overlapping bracket 221, and one side of the thermal expansion sealing strip 3 is engaged in the slot 222. Specifically, during installation, the thermal expansion sealing strip 3 is embedded in the slot 222 and pressed tightly onto the overlapping bracket 221.

[0025] Furthermore, the fireproof plate 22 and the support plate 21 are detachably connected by bolts 24; the surface of the support plate 21 is provided with a connection hole 211 that mates with the bolts 24.

[0026] Specifically, during the actual assembly process, bolts 24 are passed sequentially through one side of the fireproof plate 22, the support plate 21, and the fireproof plate 22 on the other side, fixing the two fireproof plates 22 onto the support plate 21. The connection holes 211 on the support plate 21 facilitate the connection of bolts 24. Furthermore, washers can be added to the bolts 24 during installation to ensure the stability of the fireproof plate 22 installation.

[0027] Furthermore, to ensure the sealing of the entire fire damper, the length of the support plate 21 is equal to the width of the valve body 1, thereby sealing the entire port of the valve body 1.

[0028] Furthermore, a sealing baffle 4 is provided circumferentially on the inner wall of the valve body 1, and the valve plate 2 abuts against the sealing baffle 4.

[0029] Specifically, a ring of sealing baffles 4 is provided along the inner wall of valve body 1. When valve plates 2 are closed, both sides of multiple valve plates 2 abut against the sealing baffles 4 on the left and right sides of valve body 1. The topmost valve plate 2 and the bottommost valve plate 2 abut against the sealing baffles 4 on the top and bottom sides of valve body 1, respectively, to further improve the sealing performance between valve plates 2 and valve body 1.

[0030] Furthermore, specifically, refer to Figure 3 As shown, in this embodiment, the cross-section of valve plate 2 is arc-shaped, referring to... Figure 5 As shown, in another embodiment of this utility model, the cross-section of the valve plate 2 can also be rhomboid. This makes the shape of the valve plate 2 conform to the requirements of hydrodynamics, optimizes airflow control, and further improves the sealing performance of the entire fire damper.

[0031] In summary, this utility model introduces a high-sealing, high-temperature resistant fire damper. In this utility model, the valve plate 2 adopts a composite structure of steel plate and fireproof plate 22, which has good high-temperature resistance and heat insulation performance, avoids deformation of valve plate 2, and effectively prevents smoke leakage during fire. Secondly, the thermal expansion sealing strip 3 at the overlap of valve plate 2 fills the gap between valve plate 2 and valve body 1, and between valve plates 2, forming a dynamic seal, further ensuring the sealing performance of the entire fire damper and preventing smoke leakage.

[0032] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A high-sealing, high-temperature resistant fireproof valve, characterized in that, include: The valve body and valve plates are arranged in an array along the height direction of the valve body. Any two adjacent valve plates overlap each other, and the two valve plates near the top and bottom of the valve body abut against the valve body. A thermal expansion sealing strip is provided at the overlap of the valve plates. The valve plates include a support plate and two fireproof plates. The two ends of the support plate are rotatably connected to the valve body, and the two fireproof plates are arranged on both sides of the support plate.

2. The high-sealing, high-temperature resistant fireproof valve according to claim 1, characterized in that: The support plate is provided with a rotating shaft along its length axis, and the rotating shaft passes through the valve body.

3. The high-sealing, high-temperature resistant fireproof valve according to claim 2, characterized in that: The fireproof board is provided with an overlapping bracket on one side along the width direction, and a pair of fireproof boards are symmetrically arranged along the center of the rotating axis.

4. The high-sealing, high-temperature resistant fireproof valve according to claim 3, characterized in that: The fireproof board has a slot on the side away from the overlapping bracket, and one side of the thermal expansion sealing strip is engaged in the slot.

5. The high-sealing, high-temperature resistant fireproof valve according to claim 1, characterized in that: The fireproof board and the support plate are detachably connected by bolts.

6. The high-sealing, high-temperature resistant fireproof valve according to claim 5, characterized in that: The surface of the support plate has connection holes that mate with the bolts.

7. The high-sealing, high-temperature resistant fireproof valve according to claim 1, characterized in that: The length of the support plate is equal to the width of the valve body.

8. The high-sealing, high-temperature resistant fireproof valve according to claim 1, characterized in that: A sealing baffle is provided on the inner wall of the valve body, and the valve plate abuts against the sealing baffle.

9. The high-sealing, high-temperature resistant fireproof valve according to claim 1, characterized in that: The cross-section of the valve plate is arc-shaped or wedge-shaped.

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