Metal composite fire-resistant air pipe

Abstract

The utility model discloses a metal composite fire-resistant air pipe which comprises at least two air pipe sections and connecting pieces used for connecting the two adjacent air pipe sections, and grooves are formed in the two ends of the top wall and the two ends of the bottom wall of each air pipe section along the edges of the ends. The connecting piece comprises a cover plate, and two protruding strips corresponding to the grooves extend out of one plate face of the cover plate. Two connecting pieces are arranged at the connecting position of every two adjacent air pipe sections, one connecting piece faces downwards so that the two protruding strips of the connecting piece can be sunken into the grooves in the connecting position of the top walls of the two adjacent air pipe sections, and the other connecting piece faces upwards so that the two protruding strips of the connecting piece can be sunken into the grooves in the splicing position of the bottom walls of the two adjacent air pipe sections. Therefore, the two adjacent air pipe sections are fixed together. According to the metal composite fire-resistant air pipe, the two protruding strips of the connecting piece are sunken into the grooves in the ends of the two adjacent air pipe sections respectively, the two adjacent air pipe sections can be fixed together rapidly, and rapid installation and connection are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-resistant air ducts, in particular to a metal composite fire-resistant air duct. Background Art

[0002] Air ducts, also known as ventilation pipes, are usually installed on the ceiling of the building floor for ventilation and exhaust to reduce the concentration of harmful gases. In the event of a fire, the ventilation duct plays a role in smoke exhaust, so the ventilation duct needs to have a fireproof function. At present, the industry has proposed a metal composite fire-resistant air duct, which is mainly made of magnesium crystal plate. The air duct made of magnesium crystal plate has good fire resistance. In order to facilitate the deployment of fire-resistant air ducts of different lengths, the fire-resistant air ducts currently on the market are designed into a small section. The two adjacent sections of the fire-resistant air duct are connected by bolts, and the fire-resistant air ducts are connected one by one to achieve the desired length. During the connection process, it is necessary to align the bolt holes of the flanges on the two sections of the fire-resistant air duct, and then align each bolt with the bolt hole and tighten it to connect the two sections of the fire-resistant air duct. In order to ensure the sealing of the connection between the fire-resistant air duct sections, the number of bolts is usually set to be relatively large, and tightening them one by one is troublesome. Summary of the invention

[0003] The utility model aims to provide a metal composite fire-resistant air duct, which is convenient for quick installation and connection.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a metal composite fire-resistant air duct, comprising at least two air duct sections and a connecting piece for connecting two adjacent air duct sections, the top wall and the bottom wall of each air duct section are provided with grooves along the end edges at both ends; the connecting piece comprises a cover plate, and two convex strips corresponding to the above-mentioned grooves extend from one plate surface of the cover plate; two of the connecting pieces are arranged at the connection between each two adjacent air duct sections, wherein one connecting piece is downward so that its two convex strips are respectively sunk into the grooves at the connection between the top walls of the two adjacent air duct sections, and the other connecting piece is upward so that its two convex strips are respectively sunk into the grooves at the joint between the bottom walls of the two adjacent air duct sections, thereby fixing the two adjacent air duct sections together.

[0005] Furthermore, sealing rings are provided at the edges of the end faces at both ends of the air duct section, and every two adjacent air duct sections are abutted by the sealing rings.

[0006] Furthermore, one end surface of the air duct section is recessed to form a slot, and the other end surface is protruded to form a bulge. Among two adjacent air duct sections, the bulge of one is inserted into the slot of the other.

[0007] Furthermore, a sealing ring is provided in the clamping groove or on the clamping protrusion of the air duct section.

[0008] Furthermore, the top wall of the duct section sinks at both ends to form a connecting platform, and the bottom wall of the duct section rises at both ends to form a connecting platform. The groove is arranged on the connecting platform, and the cover plate of the connecting piece is flush with the duct section after the convex strip sinks into the groove.

[0009] Furthermore, the connecting piece includes a transverse locking mechanism, which is laterally extended to lock the connecting piece and two adjacent air duct sections together.

[0010] Furthermore, the transverse locking mechanism includes an operating portion exposed on the top surface of the cover plate and two transverse locking strips located inside the cover plate. A through hole is respectively opened on the two opposite side walls of the cover plate close to the air duct section, and the top wall and the bottom wall of the air duct section are opened with insertion holes corresponding to the through holes of the cover plate next to the connecting platforms at both ends. When the convex strip of the connecting piece is sunk into the groove of the air duct section, the through holes on the two opposite side walls of the cover plate close to the air duct section are respectively aligned with the insertion holes of the two adjacent air duct sections. The rotation of the operating portion drives the two transverse locking strips to extend toward the through holes on both sides of the cover plate and extend into the insertion holes of the corresponding air duct sections, thereby locking the connecting piece and the two adjacent air duct sections together.

[0011] Furthermore, the two transverse locking strips are located on both sides of the operating portion, and a tooth pattern is provided on one side of the transverse locking strip facing the operating portion. The lower end of the operating portion is connected to the two transverse locking strips through a gear transmission.

[0012] The metal composite fire-resistant air duct provided by the utility model has two convex strips of the connecting piece respectively sunk into the grooves at the ends of two adjacent air duct sections, which can quickly fix the two adjacent air duct sections together, facilitating rapid installation and connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the metal composite fire-resistant air duct in an unassembled state.

[0014] Figure 2 It is a structural schematic diagram of the metal composite fire-resistant air duct in the assembled state.

[0015] Figure 3 It is a structural schematic diagram of the lateral locking mechanism of the connecting piece. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with specific implementation methods.

[0017] like Figure 1As shown, the metal composite fire-resistant air duct includes at least two air duct sections 1 with a rectangular cross section, and the top wall of each air duct section 1 is sunken at both ends to form a connection platform, and the bottom wall is raised at both ends to form a connection platform. Each air duct section 1 is provided with a groove 11 along the edge of the end on the connection platform of the top wall and the bottom wall. The metal composite fire-resistant air duct includes a connector 2 for connecting two adjacent air duct sections 1. The connector 2 includes a cover plate 20, and one plate surface of the cover plate extends with two convex strips 21 corresponding to the grooves 11 at the ends of the air duct section. If it is necessary to install multiple sections of air duct 1 into a whole fire-resistant air duct, the operator will splice the ends of each section of the air duct 1 together. In this state, the above-mentioned connecting pieces 2 are used to fix the sections of the air duct 1 together. Specifically, two of the above-mentioned connecting pieces 2 are provided at the connection between each two adjacent sections of the air duct, wherein one connecting piece 2 faces downward so that its two convex strips 21 are respectively sunk into the grooves 11 of the top walls of the two adjacent sections of the air duct at the connection, and the other connecting piece 2 faces upward so that its two convex strips 21 are respectively sunk into the grooves 11 of the bottom walls of the two adjacent sections of the air duct, thereby fixing the two adjacent sections of the air duct together. Figure 2 As shown, in this state, the cover plate 20 of the connector 2 located at the top wall of the air duct segment 1 is flush with the top surface of the air duct segment 1, and the cover plate 20 of the connector 2 located at the bottom wall of the air duct segment 1 is flush with the bottom surface of the air duct segment 1. Sealing rings (not shown) are provided at the edges of the end surfaces of both ends of the air duct segment 1, and the two adjacent air duct segments 1 are abutted by the sealing rings, so that the two adjacent air duct segments 1 are sealed at the connection. Other embodiments can be changed to: the end surface of one end of the air duct segment 1 is concave to form a slot, and the end surface of the other end is protruding to form a convex, and the sealing ring is changed to be arranged in the slot or on the convex, and the convex of one of each two adjacent air duct segments 1 is inserted into the slot of the other and abutted by the sealing ring, so that the two adjacent air duct segments 1 are sealed at the connection. Through the cooperation of the slot and the convex, it can be prevented that the two adjacent air duct segments 1 are not aligned and sealed due to displacement on the vertical plane of the connection during the connection process.

[0018] Although the connector 2 is sunk into the groove 11 and the two adjacent air duct sections 1 are fixed by the engagement force between the convex strip of the connector 2 and the groove 11 of the air duct section 1, considering that the fire-resistant air duct may vibrate during operation, in order to prevent the connector 2 from being separated from the connection between each two adjacent air duct sections 1, in this embodiment, the connector 2 preferably includes a transverse locking mechanism, which is laterally extended to lock the connector 2 and the two adjacent air duct sections 1 together. Specifically:

[0019] like Figure 3As shown, the transverse locking mechanism includes an operating portion 201 exposed on the top surface of the cover plate 20 and two left and right transverse locking strips 203 and 204 located inside the cover plate 20. The operating portion 201 is located in the middle of the cover plate 20, and the two transverse locking strips 203 and 204 are located at the front and rear sides of the operating portion 201. The transverse locking strips 203 and 204 are provided with tooth patterns on the side facing the operating portion 201, and the lower end of the operating portion 201 is connected to the two transverse locking strips 203 and 204 through a gear 202. A through hole 205 is respectively opened on the left and right side walls of the cover plate 20 (i.e., the two opposite side walls close to the air duct section), and the top wall and the bottom wall of the air duct section 1 are opened with a plug hole 12 corresponding to the through hole 205 of the cover plate 20 next to the connection platform at both ends. When the convex strip 21 of the connector 2 is sunk into the groove 11 of the air duct section 1, the through holes 205 on the left and right side walls of the cover plate 20 are respectively aligned with the insertion holes 12 of the adjacent left and right air duct sections 1. The operator uses an operating tool such as a wrench to rotate the operating part 201, which drives the two transverse locking strips 203 and 204 to extend to the through holes 205 on the left and right sides of the cover plate 20 and extend into the corresponding insertion holes 12 of the air duct section 1, thereby locking the connector 2 and the adjacent two air duct sections 1 together. If the connector 2 needs to be unlocked, the operating part 201 is rotated in the opposite direction, driving the two transverse locking strips 203 and 204 to retract to the middle of the cover plate 20, thereby withdrawing from the insertion holes 12 of the corresponding air duct section 1, and unlocking is achieved.

[0020] The above is only an implementation method of the invention, and does not limit the scope of patent protection. Those skilled in the art can make non-substantial changes or substitutions based on the invention, which still fall within the scope of patent protection.

Claims

1. A metal composite fire-resistant air duct, comprising at least two air duct sections (1) and a connecting piece (2) for connecting two adjacent air duct sections (1), characterized in that: The top wall and the bottom wall of each air duct section are provided with grooves (11) along the end edges at both ends; the connecting member (2) comprises a cover plate (20), and two convex strips (21) corresponding to the above-mentioned grooves (11) extend from one plate surface of the cover plate; two connecting members (2) are provided at the connection between each two adjacent air duct sections, wherein one connecting member (2) is downwardly facing so that its two convex strips (21) are respectively sunk into the grooves (11) of the top walls of the two adjacent air duct sections (1) at the connection, and the other connecting member (2) is upwardly facing so that its two convex strips (21) are respectively sunk into the grooves (11) of the top walls of the two adjacent air duct sections (1) The bottom wall is in the groove (11) at the joint, thereby fixing two adjacent air duct sections (1) together; the top wall of the air duct section (1) sinks at both ends to form a connection platform, and the bottom wall of the air duct section (1) is lifted at both ends to form a connection platform, the groove (11) is arranged on the connection platform, and the cover plate (20) of the connecting piece (2) is flush with the air duct section (1) after the convex strip (21) is sunken into the groove (11); the connecting piece (2) includes a transverse locking mechanism, and the transverse locking mechanism is extended transversely to lock the connecting piece (2) and the two adjacent air duct sections (1) together.

2. The metal composite fire-resistant air duct according to claim 1, characterized in that: Sealing rings are provided at the edges of the end faces of both ends of the air duct section (1), and every two adjacent air duct sections (1) are abutted against each other via the sealing rings.

3. The metal composite fire-resistant air duct according to claim 1, characterized in that: One end surface of the air duct section (1) is concave to form a slot, and the other end surface is protruding to form a convexity. Among two adjacent air duct sections (1), the convexity of one is inserted into the slot of the other.

4. The metal composite fire-resistant air duct according to claim 3, characterized in that: The air duct section (1) is provided with a sealing ring in the clamping groove or on the clamping protrusion.

5. The metal composite fire-resistant air duct according to claim 1, characterized in that: The transverse locking mechanism comprises an operating portion (201) exposed on the top surface of the cover plate (20) and two transverse locking strips (203, 204) located inside the cover plate (20); two opposite side walls of the cover plate (20) close to the air duct section are respectively provided with through holes (205); the top wall and the bottom wall of the air duct section (1) are provided with insertion holes (12) corresponding to the through holes (205) of the cover plate (20) beside the connecting platforms at both ends; and the convex strips (21) of the connecting piece (2) are sunk into the air duct section (1). ), the through holes (205) on the two opposite side walls of the cover plate (20) close to the air duct section are respectively aligned with the insertion holes (12) of the two adjacent air duct sections (1), and the rotation of the operating portion (201) drives the two transverse locking strips (203, 204) to extend respectively toward the through holes (205) on both sides of the cover plate (20) and extend into the insertion holes (12) of the corresponding air duct sections, thereby locking the connecting piece (2) and the two adjacent air duct sections (1) together.

6. The metal composite fire-resistant air duct according to claim 5, characterized in that: The two transverse locking strips (203, 204) are located on both sides of the operating portion (201); a side of the transverse locking strips (203, 204) facing the operating portion (201) is provided with tooth patterns; the lower end of the operating portion (201) is transmission-connected to the two transverse locking strips (203, 204) via a gear (202).

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