L-shaped flange embedded steel surface magnesium fireproof composite air pipe

Abstract

The utility model relates to steel face magnesium fireproof composite air pipe technical field, concretely is a kind of L type flange embedded steel face magnesium fireproof composite air pipe, including air pipe body and the L type flange of detachable connection in the both ends of air pipe body and air pipe body, air pipe body includes the galvanized iron sheet of outside and the magnesium plate of inside, the vertical edge of L type flange and the end surface of galvanized iron sheet and the end surface of magnesium plate abut, the inside surface of galvanized iron sheet and with the outside surface of magnesium plate abut, the inside surface of magnesium plate and the horizontal edge of L type flange abut.The utility model is in-embedded by L type flange and is installed in the inside of air pipe body, avoids the connecting gap between magnesium plate and galvanized iron sheet, between galvanized iron sheet and flange from product structure design technology, optimizes and omits sealing process step and alignment leveling step, and fast fixed connection of flange and air pipe body can be realized by one screw connection, maximum degree optimization assembly step, improve assembly efficiency, it is convenient for staff on-site construction.

Description

Technical Field

[0001] This utility model relates to the technical field of steel-faced magnesium fireproof composite air ducts, specifically an L-shaped flange-embedded steel-faced magnesium fireproof composite air duct. Background Technology

[0002] As a new type of fireproof air duct, the steel-faced magnesium fireproof composite air duct is composed of a steel face and a magnesium core material. It has high resistance to chemical corrosion and can resist various corrosive substances in the internal and external environments of the air duct. At the same time, the magnesium material has an extremely low thermal conductivity coefficient, which can effectively isolate the heat exchange between the internal and external air and ensure the temperature stability of the airflow inside the air duct.

[0003] Currently, steel-faced magnesium fireproof composite air ducts are mostly assembled and fixed by splicing and fixing with T-shaped inserts, square plates, and L-shaped flanges. The specific assembly steps are as follows: First, apply sealant to the inside of the opening of the T-shaped insert to ensure the sealing of the gap between the T-shaped insert and the plate; insert the plates into the openings of the T-shaped inserts respectively, and splice and assemble the plates together to form a hollow frame structure. During splicing and assembly, the plates on both sides of the frame should be kept flush; after alignment and leveling, work from the outside to the inside of the T-shaped inserts. Screws are driven in to secure the insert to the plate. L-shaped flanges are fitted onto the outer sides of both ends of the frame, with the vertical edges of the flanges flush with the ends of the frame. After alignment and leveling, pliers are used to clamp the horizontal edges of the flanges against the side walls of the frame, ensuring a tight fit. Screws are then driven in from the outside in along the horizontal edges of the flanges to secure them to the frame. Finally, sealant is applied to the gaps between the vertical edges of the flanges and the plate. After sealing, the sealant must be allowed to dry in a well-ventilated area until it hardens before proceeding to the next assembly step. However, the above assembly process is overly complex and cumbersome, time-consuming, and inefficient, hindering the rapid installation of fire-resistant ventilation ducts on-site.

[0004] Furthermore, magnesium sheets are prone to damage and chipping during transportation or assembly due to impacts, leading to gaps in the connection between ducts and compromising the overall airtightness of the fire-resistant ventilation ducts. To address this, ducts with metal-sealed ends for magnesium sheets have been introduced on the market. However, this requires adding a metal-sealing process to the existing assembly steps, making the assembly process of steel-faced magnesium fire-resistant composite ducts more complicated, extending the assembly time, and increasing product costs. Utility Model Content

[0005] The purpose of this utility model is to provide an L-shaped flange-embedded steel-faced magnesium fireproof composite air duct that addresses the shortcomings of existing technologies. It optimizes and eliminates the sealing process and alignment steps, reduces the number of screw connections, and solves the problems of overly complex and cumbersome assembly steps, long installation time, and poor overall sealing performance of fireproof ventilation ducts in the existing technologies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An L-shaped flange-embedded steel-faced magnesium fireproof composite air duct includes an air duct body and L-shaped flanges located at both ends of the air duct body and detachably connected to the air duct body. The air duct body includes a hollow base pipe constructed of magnesium plate and a galvanized iron sheet covering the outside of the base pipe. The axial length of the base pipe and the galvanized iron sheet is the same. The L-shaped flange has a horizontal edge extending in the axial direction and a vertical edge extending in the circumferential direction. The vertical edge of the L-shaped flange abuts against the end face of the galvanized iron sheet and the end face of the base pipe. The inner surface of the galvanized iron sheet abuts against the outer surface of the base pipe, and the inner surface of the base pipe abuts against the horizontal edge of the L-shaped flange.

[0008] Furthermore, the duct body and the L-shaped flange are connected by self-tightening screws. The self-tightening screws pass through the galvanized iron sheet, magnesium plate and the horizontal edge of the L-shaped flange to achieve relative fixation of the galvanized iron sheet, magnesium plate and L-shaped flange.

[0009] Furthermore, there are multiple galvanized iron sheets that are interlocked with each other.

[0010] Furthermore, the duct body has a square structure, and there are two galvanized iron sheets, which are L-shaped.

[0011] Furthermore, the two galvanized iron sheets are fastened together at opposite corners of the duct body. One of the fastening ends of the galvanized iron sheets is provided with a flange, and the other fastening end is provided with a groove. The groove includes a fitting part corresponding to the flange, and a bending part for bending and wrapping the flange after the flange and the fitting part are fitted together.

[0012] Furthermore, the width of the horizontal side of the L-shaped flange is smaller than the width of the vertical side.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model achieves metal edge sealing on both ends of the magnesium plate by embedding an L-shaped flange inside the magnesium plate and wrapping the outside of the magnesium plate with a layer of galvanized iron sheet. From a product structure design and manufacturing process perspective, this avoids connection gaps between the magnesium plate and the galvanized iron sheet, and between the galvanized iron sheet and the flange. It also prevents gaps at the connection point after bolting two steel-faced magnesium fireproof composite air ducts, effectively ensuring the overall airtightness of the fire-resistant ventilation duct and optimizing and eliminating sealing process steps. Furthermore, after splicing and assembling the galvanized iron sheet and magnesium plate, there is no need for further processing. Alignment and leveling of the side ends can be achieved simply by pushing the flanges on both sides inward to make the vertical edge of the L-shaped flange abut against the end face of the duct body, thus eliminating the need for alignment and leveling steps. The two-way screw connection is reduced to a single screw connection, which can achieve the fixed connection of the flange, magnesium plate, and galvanized steel surface. This enables quick and easy fixing of the flange to the duct body, improves the edge strength of the steel-faced magnesium fireproof composite duct, optimizes the assembly steps of the steel-faced magnesium fireproof composite duct to the greatest extent, improves the assembly efficiency of the steel-faced magnesium fireproof composite duct, and facilitates on-site construction by workers.

[0015] Furthermore, the inner magnesium plate is covered by two interlocking L-shaped galvanized iron sheets, which enhances the structural strength of the steel-faced magnesium fireproof composite air duct and prevents structural deformation. At the same time, the two galvanized iron sheets can be stacked together during movement and transportation, greatly reducing the footprint and transportation costs. The assembly method is convenient and easy to learn, further improving the assembly efficiency of the steel-faced magnesium fireproof composite air duct and enabling rapid installation of fire-resistant ventilation ducts. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of an L-shaped flange-embedded steel-faced magnesium fireproof composite air duct provided by this utility model;

[0017] Figure 2 A front sectional view of an L-shaped flange-embedded steel-faced magnesium fireproof composite air duct provided for this utility model;

[0018] Figure 3 A side sectional view of an L-shaped flange-embedded steel-faced magnesium fireproof composite air duct provided for this utility model;

[0019] Figure 4 A schematic diagram of a steel-faced magnesium fireproof composite air duct with an embedded L-shaped flange, omitting the front L-shaped flange, provided by this utility model;

[0020] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0021] Figure 6A schematic diagram of the structure of an L-shaped flange-embedded steel-faced magnesium fireproof composite air duct before the bending part is bent inward, provided for this utility model.

[0022] Figure 7 A front structural diagram of an L-shaped flange embedded in a steel-faced magnesium fireproof composite air duct provided by this utility model.

[0023] Figure 8 This utility model provides a schematic diagram of the back structure of an L-shaped flange embedded in a steel-faced magnesium fireproof composite air duct.

[0024] The attached figures are labeled as follows:

[0025] 1. Duct body; 11. Galvanized iron sheet; 12. Magnesium sheet; 13. Flange; 14. Groove; 141. Fitting part; 142. Bending part; 2. L-shaped flange; 21. Horizontal edge; 22. Vertical edge. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0028] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0030] For easier understanding, please refer to Figure 1 and Figure 8 This embodiment provides an L-shaped flange-embedded steel-faced magnesium fireproof composite air duct, including a square hollow structure air duct body 1. The air duct body 1 includes galvanized iron sheet 11 and a base pipe from the outside to the inside. The base pipe includes four magnesium plates 12 spliced ​​together. The galvanized iron sheet 11 is wrapped around and covered on the outer side of the base pipe. The axial length of the galvanized iron sheet 11 and the magnesium plate 12 is the same. The duct body 1 is symmetrically and detachably connected to an L-shaped flange 2 at both ends of its horizontal longitudinal direction. The L-shaped flange 2 is embedded inside the duct body 1. Specifically, the L-shaped flange 2 has a horizontal edge 21 extending in the axial direction and a vertical edge 22 extending in the circumferential direction. The width of the horizontal edge 21 is smaller than the width of the vertical edge 22. The inner side of the galvanized iron sheet 11 is tightly fitted and sealed against the outer side of each magnesium plate 12. The inner side of each magnesium plate 12 is tightly fitted and sealed against the horizontal edge 21 of the L-shaped flange 2. The vertical edge 22 of the L-shaped flange 2 is tightly fitted and sealed against the end face of the galvanized iron sheet 11 and the end face of each magnesium plate 12. Small through holes are correspondingly provided on the side walls of the galvanized iron sheet 11, the magnesium plate 12, and the horizontal edge 21 of the L-shaped flange 2. Self-tightening screws are used to pass through these small through holes sequentially from the outside to the inside, thereby achieving relative fixation of the galvanized iron sheet 11, magnesium plate 12, and L-shaped flange 2, i.e., relative fixation of the duct body 1 and the L-shaped flange 2. Bolts are used to pass through the large through holes on the vertical edge 22 of the L-shaped flange 2 on two adjacent steel-faced magnesium fireproof composite ducts in the horizontal direction, and nuts are used to achieve relative fixation of the two adjacent steel-faced magnesium fireproof composite ducts. The horizontal edge 21 of the L-shaped flange 2 only needs to cover the end of the magnesium plate 12 and leave enough space for the self-tightening screw to pass through. The vertical edge 22 of the L-shaped flange 2 is used for the connection and fixation between ducts, so the width of the horizontal edge 21 is slightly smaller than the width of the vertical edge 22.

[0031] For better understanding, please continue reading. Figure 1 and Figure 8 A square duct body 1 includes two L-shaped galvanized iron sheets 11 and four square magnesium plates 12. The two galvanized iron sheets 11 are fastened together at two opposite corners of the duct body 1. One fastening end of one galvanized iron sheet 11 has a single-sided flange 13, and the corresponding fastening end has a double-sided groove 14. The groove 14 includes a fitting part 141 that abuts and fits against the flange 13, and a bending part 142 for bending inward to wrap around the flange 13 after the flange 13 abuts and fits against the fitting part 141. In the initial state, the groove 14 has an S-shaped structure. After the bending part 142 is bent inward to wrap around the flange 13 (i.e., after the fastening action is completed), the groove 14 changes to a G-shaped structure.

[0032] Assembly method of this utility model:

[0033] The workers first insert the flange 13 of the first galvanized iron sheet 11 into the corresponding fitting portion 141 of the groove 14 of the second galvanized iron sheet 11, thus limiting the flange 13 in the horizontal direction. Then, the bent portion 142 of the groove 14 of the second galvanized iron sheet 11 is bent inwards until it abuts against the outer wall of the first galvanized iron sheet 11, completing the wrapping of the first galvanized iron sheet 11 and limiting the flange 13 in the vertical direction, thus completing the one-point fastening connection of the two galvanized iron sheets 11. Similarly, the flange 13 of the second galvanized iron sheet 11 is fastened to the groove 14 of the first galvanized iron sheet 11, completing the two-point fastening connection of the two galvanized iron sheets 11, thereby achieving the relative fixed installation of the two galvanized iron sheets 11 in both the horizontal and vertical directions. Next, four magnesium plates 12 are inserted into the inner side of the galvanized iron sheet 11, so that the outer wall of each magnesium plate 12 abuts against the inner wall of the galvanized iron sheet 11, thus completing the fastening connection. The installation of a duct body 1 is performed. Then, two L-shaped flanges 2 are inserted into the middle cavity of the duct body 1, corresponding to the front and rear (horizontal and longitudinal) ends of the duct body 1, respectively. The horizontal edges 21 of the two L-shaped flanges 2 are tightly fitted to the inner walls of the four magnesium plates 12, until the vertical edges 22 of the two L-shaped flanges 2 simultaneously abut against the end faces of the two galvanized iron sheets 11 and the four magnesium plates 12, thus fixing the two galvanized iron sheets 11 and the four magnesium plates 12. Finally, multiple through holes are made on the front and rear ends of the galvanized iron sheets 11, the front and rear ends of the magnesium plates 12, and the horizontal edges 21 of the two L-shaped flanges 2. Self-tightening screws are locked into the corresponding through hole positions from the outside to the inside, thus fixing the two galvanized iron sheets 11, the four magnesium plates 12, and the two L-shaped flanges 2. This completes the assembly of a steel-faced magnesium fireproof composite duct.

[0034] Although the present invention has been described using the above preferred embodiments, it is not intended to limit the scope of protection of the present invention. Any changes and modifications made by those skilled in the art to the above embodiments without departing from the spirit and scope of the present invention shall still fall within the scope of protection of the present invention.

Claims

1. A type of L-shaped flange-embedded steel-faced magnesium fireproof composite air duct, characterized in that, The duct includes a duct body (1) and L-shaped flanges (2) located at both ends of the duct body (1) and detachably connected to the duct body (1). The duct body (1) includes a hollow base pipe constructed of magnesium plate (12) and a galvanized iron sheet (11) covering the outside of the base pipe. The axial length of the base pipe and the galvanized iron sheet (11) are the same. The L-shaped flange (2) has a horizontal side (21) extending in the axial direction and a vertical side (22) extending in the circumferential direction. The inner side of the galvanized iron sheet (11) abuts against the outer side of the base pipe. The inner side of the base pipe abuts against the horizontal side (21) of the L-shaped flange (2). The vertical side (22) of the L-shaped flange (2) abuts against the end face of the galvanized iron sheet (11) and the end face of the base pipe.

2. The L-shaped flange-embedded steel-faced magnesium fireproof composite air duct according to claim 1, characterized in that, The duct body (1) and the L-shaped flange (2) are connected by self-tightening screws. The galvanized iron sheet (11), magnesium plate (12) and L-shaped flange (2) are relatively fixed by the self-tightening screws passing through the galvanized iron sheet (11), magnesium plate (12) and the horizontal edge (21) of the L-shaped flange (2).

3. The L-shaped flange-embedded steel-faced magnesium fireproof composite air duct according to claim 1, characterized in that, The galvanized iron sheet (11) is multiple and interlocked with each other.

4. The L-shaped flange-embedded steel-faced magnesium fireproof composite air duct according to claim 3, characterized in that, The duct body (1) has a square structure, and there are two galvanized iron sheets (11) with an L-shaped structure.

5. The L-shaped flange-embedded steel-faced magnesium fireproof composite air duct according to claim 4, characterized in that, Two galvanized iron sheets (11) are fastened together at opposite corners of the duct body (1). One of the fastening ends of the galvanized iron sheet (11) is provided with a flange (13), and the other fastening end is provided with a groove (14). The groove (14) includes a fitting part (141) corresponding to the flange (13), and a bending part (142) for bending and wrapping the flange (13) after the flange (13) is fitted with the fitting part (141).

6. The L-shaped flange-embedded steel-faced magnesium fireproof composite air duct according to claim 1, characterized in that, The width of the horizontal side (21) of the L-shaped flange (2) is smaller than the width of the vertical side (22).

Images