Fireproof ventilating duct structure

Abstract

The utility model relates to the technical field of ventilation equipment. The fireproof ventilating pipeline structure comprises an inner-layer galvanized sheet pipe body and an outer-layer galvanized sheet pipe body, and a frame type reinforcing frame is arranged between the inner-layer galvanized sheet pipe body and the outer-layer galvanized sheet pipe body. The frame body of the reinforcing frame, the inner-layer galvanized sheet pipe body and the outer-layer galvanized sheet pipe body jointly define a filling area filled with a fireproof layer. A plurality of vertical buffer pull rods are arranged in the inner-layer galvanized plate pipe body, and the upper ends and the lower ends of the buffer pull rods are connected with the cross beams of the reinforcing frames respectively; the buffering pull rod comprises a center sleeve and connecting rods penetrating through the two ends of the center sleeve, the ends, located in the center sleeve, of the buffering pull rod are connected through a spring, and the other ends of the buffering pull rod penetrate through the inner-layer galvanized plate pipe body to be connected with the cross beam of the reinforcing frame. The deformation risk of the air pipe under the action of high temperature can be reduced, and the structural stability of the air pipe is improved.

Description

Technical Field

[0001] This utility model relates to the field of ventilation equipment technology, specifically to a fireproof ventilation duct structure. Background Technology

[0002] Ventilation ducts are a crucial component of fire protection and smoke extraction systems, serving as channels for expelling high-temperature, harmful smoke and playing a vital role in the safety of people and property within buildings. Currently, traditional fire-resistant ventilation ducts typically enhance their fire resistance by adding fire-resistant and insulation layers to the inner and outer layers of the duct body. However, in practical applications, the ducts are often subjected to significant heat shocks when high-temperature smoke flows through them, leading to increased temperature rise and a greater risk of deformation. Once deformation occurs, it can easily cause smoke leaks that contaminate non-disaster areas, and may even loosen the fixings, compromising safety during use. Summary of the Invention

[0003] The purpose of this utility model is to provide a fireproof ventilation duct structure that is not easily deformed and has internal support.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is: a fireproof ventilation duct structure, including an inner galvanized steel pipe body and an outer galvanized steel pipe body, wherein a frame-type reinforcing frame is provided between the inner galvanized steel pipe body and the outer galvanized steel pipe body, and the frame of the reinforcing frame and the inner galvanized steel pipe body and the outer galvanized steel pipe body together form a filling area for filling the fireproof layer;

[0005] The inner galvanized steel tube is equipped with several vertical buffer rods. The upper and lower ends of the buffer rods are respectively connected to the crossbeam of the reinforcing frame. The buffer rod includes a central sleeve and connecting rods passing through both ends of the central sleeve. The ends of the buffer rods located in the central sleeve are connected by a spring, and the other end passes through the inner galvanized steel tube and is connected to the crossbeam of the reinforcing frame.

[0006] Preferably, the crossbeam of the reinforcing frame has several clearance holes on its outer side wall, the clearance holes being positioned opposite the buffer tie rod; the end of the connecting rod away from the central sleeve passes through the crossbeam and has an external thread, and a nut located inside the crossbeam is installed at the end of the connecting rod.

[0007] Preferably, the fireproof layer is glass wool board.

[0008] Preferably, the fireproof layer is a rock wool board.

[0009] Preferably, the spring includes a central tension spring and an outer compression spring, with both ends of the central tension spring hooked onto hooks at the ends of the connecting rod via hooks.

[0010] The beneficial effects of this invention are mainly reflected in its ability to reduce the risk of duct deformation under high temperatures and improve its structural stability. Specifically, during use, regardless of whether high temperatures invade the duct from the inside or outside, the buffer rod, with its central sleeve + connecting rod + spring structure, allows the spring to buffer and release the force through the extension and retraction of the connecting rod within the central sleeve, thereby reducing the risk of duct deformation. Under normal circumstances, the buffer rod also provides reinforcement and support to the duct's reinforcing frame, further improving the duct's stability. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0013] Figure 3 for Figure 1 Enlarged view of section B in the middle. Detailed Implementation

[0014] like Figure 1-3 As shown, a fireproof ventilation duct structure is mainly used in smoke control and exhaust systems, and has excellent high-temperature deformation resistance. For example... Figure 1 As shown, this utility model includes an inner galvanized steel tube 1 and an outer galvanized steel tube 2, with a frame-type reinforcing frame between them. The reinforcing frame can be formed by welding, bolting, or other methods. The frame of the reinforcing frame, the inner galvanized steel tube 1, and the outer galvanized steel tube 2 together form a filling area for the fireproof layer 3. The fireproof material used for filling can be rock wool board, glass wool board, etc.

[0015] The most significant difference in this invention lies in the fact that several vertical buffer rods 4 are provided inside the inner galvanized steel tube 1, with the upper and lower ends of the buffer rods 4 connected to the crossbeams 5 of the reinforcing frame, respectively. While they can be directly installed in locations without crossbeams 5 and connected to the tube wall for fixation, installation at the crossbeam 5 position is generally preferred as it provides a more significant effect on the structural stability of the main body.

[0016] like Figure 2 As shown, the buffer rod 4 of this utility model includes a central sleeve 6 and connecting rods 7 passing through both ends of the central sleeve 6. The buffer rod 4 is connected at one end within the central sleeve 6 by a spring, and the other end passes through the inner galvanized steel tube 1 and is connected to the crossbeam 5 of the reinforcing frame. Only one spring may be provided, with both ends fixed to the connecting rod 7 by welding or screwing. Alternatively, it can be as follows... Figure 2As shown, two springs are provided, including a central tension spring 10 and an outer compression spring 11. The two ends of the central tension spring 10 are hooked to the hook rings at the ends of the connecting rod 7. The central tension spring 10 mainly bears the force when the buffer rod 4 extends, while the outer compression spring 11 mainly bears the force when the buffer rod 4 retracts.

[0017] To maintain the flatness of the duct surface and improve installation convenience, the crossbeam 5 of the reinforcing frame of this invention is provided with several clearance holes 8 on its outer side wall, the clearance holes 8 being positioned opposite the buffer rod 4. The end of the connecting rod 7 away from the central sleeve 6 passes through the crossbeam 5 and is provided with external threads, and the nut 9 located inside the crossbeam 5 is installed at the end of the connecting rod 7.

Claims

1. A fireproof ventilating duct structure, comprising an inner galvanized sheet pipe body (1) and an outer galvanized sheet pipe body (2), a frame-shaped reinforcing frame being arranged between the inner and outer galvanized sheet pipe bodies (1, 2), the frame body of the reinforcing frame and the inner and outer galvanized sheet pipe bodies (1, 2) together defining a filling area for filling a fireproof layer (3); characterized in that a plurality of vertical buffer pull rods (4) are arranged in the inner galvanized sheet pipe body (1), the upper and lower ends of the buffer pull rods (4) being connected with the cross beams (5) of the reinforcing frame respectively; the buffer pull rod (4) comprises a center sleeve (6) and a connecting rod (7) arranged in the center sleeve (6), one end of the buffer pull rod (4) in the center sleeve (6) being connected by a spring, and the other end of the buffer pull rod (4) passing through the inner galvanized sheet pipe body (1) and being connected with the cross beam (5) of the reinforcing frame.

2. A fire damming vent pipe structure according to claim 1, characterised in that: A plurality of position giving holes (8) are arranged on the lateral wall of the cross beam (5) of the reinforcing frame, the position giving holes (8) being opposite to the buffer pull rods (4); the end of the connecting rod (7) away from the center sleeve (6) passes through the cross beam (5) and is provided with external threads, and a nut (9) arranged in the cross beam (5) is mounted on the end of the connecting rod (7).

3. A fire damming vent pipe construction according to claim 2, characterised in that: The fireproof layer (3) is a glass wool board.

4. The fire-guarded vented duct structure of claim 2, wherein: The fireproof layer (3) is a rock wool board.

5. A fire damming vent pipe structure according to any one of claims 1 to 4, wherein: The spring comprises a center tension spring (10) and an outer compression spring (11), the two ends of the center tension spring (10) being hooked on the hook rings on the end of the connecting rod (7).

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