A sealing enhancement structure suitable for a low to medium pressure duct

Abstract

A sealing enhancement structure suitable for medium and low pressure air ducts includes an air duct with a flange at its end. A first sealing gasket is provided between the flanges of two adjacent air ducts. An L-shaped sealing gasket is provided on the back of the flange. Matching clamps are provided on the outside of the flange, the first sealing gasket, and the L-shaped sealing gasket. Bolts pass through the screw holes on the clamps, the L-shaped sealing gasket, the flange, and the first sealing gasket to tightly connect the two adjacent air ducts. This utility model effectively prevents air leakage at the air duct connection by compressing the sealing gasket through the flange structure with grooves and protrusions, thereby improving the operating efficiency of the system. It avoids the problems of air leakage at the interface and insufficient elasticity and tightness due to insufficient thickness of the flange gasket when using combined flange connections for traditional air duct systems. It has the advantages of simple structure, good sealing performance, and good safety.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, specifically to a sealing enhancement structure suitable for medium and low pressure air ducts. Background Technology

[0002] In building construction, ductwork is a crucial component of ventilation, smoke extraction, and air conditioning systems. The airtightness of ductwork directly impacts system efficiency and energy consumption. Existing duct connection methods primarily utilize angle steel flanges or thin steel plate flanges (common plate flange connections). Angle steel flange connections offer advantages such as high strength, stability, good sealing, and resistance to deformation, but they are costly and involve complex construction processes. Thin steel plate flange connections (common plate flange connections) offer a certain level of sealing, high installation efficiency, and low cost, but they are prone to quality issues during processing. Furthermore, during use, factors such as vibration and temperature changes can easily lead to air leakage, resulting in decreased system efficiency and increased energy consumption. Particularly in smoke extraction systems, duct leakage severely affects smoke extraction performance and threatens personnel safety. Therefore, there is an urgent need for a low-cost, easy-to-install ductwork sealing enhancement structure with excellent sealing performance. Summary of the Invention

[0003] In order to overcome the defects of the existing technology, the purpose of this utility model is to provide a sealing enhancement structure suitable for medium and low pressure air ducts. By setting a flange structure with grooves and protrusions to compress the sealing gasket, it effectively prevents air leakage at the air duct connection, improves the operating efficiency of the system, and avoids the problems of air leakage at the interface and insufficient elasticity and tightness due to insufficient thickness of the flange gasket when using combined flange connection for traditional air duct systems. It has the advantages of simple structure, good sealing performance and safety.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A sealing enhancement structure suitable for medium and low pressure air ducts includes an air duct 5, with a flange 3 at the end of the air duct 5. A first sealing gasket 2 is provided between the flanges 3 of two adjacent air ducts 5. An L-shaped sealing gasket 6 is provided on the back of the flanges 3. Matching clamps 1 are provided on the outside of the first sealing gasket 2 and the L-shaped sealing gasket 6. A bolt connector 4 passes through the bolt holes on the clamp 1, the L-shaped sealing gasket 6, the flange 3 and the first sealing gasket 2 to tightly connect the two adjacent air ducts 5.

[0006] The flange 3 at one end of the air duct 5 is provided with a groove 301, and the flange 3 at the other end is provided with a protrusion 302 that cooperates with the groove 301.

[0007] The flange 3 has a width of 25mm-30mm and forms a 90-degree angle with the air duct 5.

[0008] A fire-retardant sealant with a thickness of 1.5mm-2.5mm is applied between the L-shaped sealing gasket 6 and the flange 3.

[0009] The spacing between the bolts 4 should not exceed 150mm.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. By using a flanged structure with grooves and protrusions to compress the sealing gasket, air leakage at the duct connection is effectively prevented, thus improving the system's operating efficiency.

[0012] 2. The clamp structure connection is easy to install and the connection is firm. The application of fireproof sealant and the setting of sealing gaskets can effectively resist the effects of vibration and temperature changes, further enhancing the sealing and fire resistance performance. It is suitable for occasions with high sealing requirements, such as smoke control systems.

[0013] In summary, this utility model has the advantages of simple structure and good sealing performance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the connection relationship in this embodiment.

[0015] Figure 2 This is a front view of the structure in this embodiment.

[0016] Figure 3 This is a three-dimensional schematic diagram of this embodiment.

[0017] Figure 4 This is a detailed diagram of the air duct tight structure connection in this embodiment.

[0018] Figure 5 This is a detailed drawing of the flanged structure of the two side ducts in this embodiment.

[0019] In the diagram: 1. Clamp, 2. First sealing gasket, 3. Flanged edge, 301. Groove, 302. Protrusion, 4. Bolt connector, 5. Air duct, 6. L-shaped sealing gasket. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] like Figure 1 , Figure 2As shown, a sealing enhancement structure suitable for medium and low pressure air ducts includes an air duct 5, with a flange 3 at the end of the air duct 5. A first sealing gasket 2 is provided between the flanges 3 of two adjacent air ducts 5. An L-shaped sealing gasket 6 is provided on the back of the flanges 3. Matching clamps 1 are provided on the outside of the first sealing gasket 2 and the L-shaped sealing gasket 6. A bolt connector 4 passes through the bolt holes on the clamp 1, the L-shaped sealing gasket 6, the flange 3 and the first sealing gasket 2 to tightly connect the two adjacent air ducts 5. Radial pressure is generated by bolt tightening to form a dynamic sealing interface.

[0022] The flange 3 at one end of the air duct 5 is provided with a groove 301, and the flange 3 at the other end is provided with a protrusion 302 that matches the groove 301. The groove and protrusion on the flange 3 compress the sealing gasket, effectively preventing air leakage at the air duct connection.

[0023] The flange 3 has a width of 25mm-30mm and forms a 90-degree angle with the air duct 5.

[0024] A fire-resistant sealant with a thickness of 1.5mm-2.5mm is applied between the L-shaped sealing gasket 6 and the flange 3 to form a continuous fire barrier.

[0025] The spacing between the bolts 4 should not exceed 150mm.

[0026] The working principle of this utility model is as follows:

[0027] The ends of the duct are machined to form a flange with a width of 25-30mm. A matching groove 301 and a protrusion 302 are machined on the flange. When the bolt connector 4 passes through the clamp 1, L-shaped sealing gasket 6, first sealing gasket 2 and flange 3 at the connection surface of the adjacent duct, the tightening generates radial pressure and forms a dynamic sealing interface. Fireproof sealant is applied between the L-shaped sealing gasket 6 and the flange 3 to ensure the airtightness and fire resistance of the connection.

[0028] Although embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that...

[0029] It is understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing enhancement structure suitable for medium and low pressure air ducts, comprising an air duct (5), characterized in that, The port of the air duct (5) is provided with a flange (3). A first sealing gasket (2) is provided between the flanges (3) of two adjacent air ducts (5). An L-shaped sealing gasket (6) is provided on the back of the flanges (3). A matching clamp (1) is provided on the outside of the first sealing gasket (2) and the L-shaped sealing gasket (6). The bolt connector (4) passes through the screw holes on the clamp (1), the L-shaped sealing gasket (6), the flange (3) and the first sealing gasket (2) to tightly connect the two adjacent air ducts (5).

2. The sealing enhancement structure for medium and low pressure air ducts according to claim 1, characterized in that, The duct (5) has a groove (301) on one end of the flange (3) and a protrusion (302) on the other end of the flange (3) that matches the groove (301).

3. The sealing enhancement structure for medium and low pressure air ducts according to claim 1, characterized in that, The flange (3) has a width of 25mm-30mm and forms a 90-degree angle with the air duct (5).

4. The sealing enhancement structure for medium and low pressure air ducts according to claim 1, characterized in that, Fire-retardant sealant is applied between the L-shaped sealing gasket (6) and the flange (3).

5. The sealing enhancement structure for medium and low pressure air ducts according to claim 1, characterized in that, The spacing of the bolted connectors (4) shall not exceed 150 mm.

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