Novel spiral duct

Abstract

The utility model relates to the technical field of air pipes, and discloses a novel spiral air pipe which comprises a spirally-arranged strip-shaped plate, the spiral edges of the strip-shaped plate are mutually connected, flanges are additionally arranged at the two ends of the spirally-arranged strip-shaped plate, the two sides of the strip-shaped plate are bent towards the inner side to form inward turning and bent towards the outer side to form outward turning. The strip-shaped plate is wound in a spiral shape, the inward turning part and the outward turning part are mutually meshed and pressed, and the connection position of the spiral edges of the strip-shaped plate is provided with an outward protrusion. According to the utility model, the strip-shaped plate is spirally wound, and the inward turning part and the outward turning part are mutually engaged and pressed, namely, the buckled inward turning part and outward turning part are knocked and pressed by using external knocking equipment after buckling, so that the spiral edges of the strip-shaped plate are mutually connected, and a seamless tubular structure is formed; and meanwhile, the position of the inward turning and outward turning occlusion connection part is in an outward convex state, so that the resistance in the pipe can be ensured to be reduced, and normal flow of fluid is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of air ducts, in particular to a novel spiral air duct. Background Art

[0002] At present, the manufacturing process of air ducts usually adopts one-piece molding or spliced ​​air ducts, but such one-piece air ducts often take up a large space during transportation, or the air duct diameter formed by the spliced ​​air duct during installation and splicing is a fixed value, and it is necessary to select spliced ​​air duct parts of different specifications according to the required air duct diameters. Therefore, traditional air ducts are not adaptable, that is, it is difficult to flexibly select air ducts of different specifications and corresponding air duct connection parts according to the actual air duct size required on site, which will undoubtedly increase the complexity of on-site air duct installation and cannot quickly adapt to the required air duct size.

[0003] For this purpose, we designed a new type of spiral air duct. Utility Model Content

[0004] The utility model aims to solve the problem that air ducts of different specifications cannot be quickly selected according to the air duct sizes actually required on site, and proposes a novel spiral air duct.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A novel spiral air duct comprises a spirally arranged strip plate, the spiral edges of the strip plate are connected to each other, and flanges are installed at both ends of the spirally arranged strip plate.

[0007] Preferably, the two sides of the strip plate are respectively bent inwardly to form an inversion and bent outwardly to form an outversion.

[0008] Preferably, the strip plate is wound in a spiral shape, and the inward and outward turns are engaged and pressed against each other, and the junction of the spiral edges of the strip plate is an external protrusion.

[0009] Preferably, a first chamfer is formed on the inward turning portion, and a second chamfer is formed on the outward turning portion.

[0010] Preferably, the bending angles formed by the inward and outward turning with the surface of the strip plate are acute angles for easy snap-fitting, and the inward and outward turning are integrally formed with the strip plate.

[0011] Preferably, the strip plate is made of galvanized iron sheet which is easy to bend.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model adopts the method of winding the strip plate in a spiral shape, and can control the diameter of the spiral tubular structure by adjusting the spiral degree of the strip plate according to the required diameter, so as to achieve the effect of selecting the diameter of the spiral air duct; and the inward and outward turning are engaged and pressed against each other, that is, after the buckling, the buckled inward and outward turning are knocked and pressed against each other by an external knocking device, so that the spiral edges of the strip plate are connected to each other and form a seamless tubular structure.

[0014] 2. The flange structures on both sides can facilitate the splicing of the air duct according to the length required on site, which is conducive to meeting the needs of different places.

[0015] 3. The utility model adopts the position of the inward and outward occlusal connection parts to be in an outward convex state, which can ensure that the resistance in the pipe is reduced and facilitate the normal flow of airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a new type of spiral air duct proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of a strip plate in a new type of spiral air duct proposed by the utility model;

[0018] Figure 3 This is a front view of a strip plate in a new type of spiral air duct proposed by the utility model;

[0019] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at point A in the middle.

[0020] In the figure: 1, strip plate; 2, external protrusion; 3, inward turning; 4, outward turning; 5, first chamfer; 6, second chamfer; 7, flange. DETAILED DESCRIPTION

[0021] Reference Figure 1-Figure 4 A novel spiral air duct comprises a spirally arranged strip plate 1, such as Figure 2 As shown in the state, the spiral edges of the strip plate 1 are interconnected to form a seamless tubular structure. The material of the strip plate 1 is galvanized iron sheet which is easy to bend. It should be noted that the diameter of the spiral tubular structure is controlled by adjusting the spiral degree of the strip plate 1, thereby achieving the effect of selecting the diameter of the spiral air duct.

[0022] Flanges 7 are installed at both ends of the spirally arranged strip plate 1, which are cut into fixed lengths by cutting equipment according to different installation requirements, so that the two ends of the spiral tubular structure are cut into flat ends, and then the corresponding flanges 7 are installed to facilitate installation or connection to the corresponding length.

[0023] Reference Figure 3 and Figure 4In this state, both sides of the strip plate 1 are bent inwardly to form an inward turn 3 and outwardly to form an outward turn 4. During the pressing process, they are spirally wound, and the inner and outer bent edges are engaged and pressed with each other to achieve sealing.

[0024] The strip plate 1 is spirally wound, and the inverted part 3 and the outverted part 4 are engaged and pressed against each other, that is, after buckling, the buckled inverted part 3 and the outverted part 4 are knocked and pressed against each other using an external knocking device;

[0025] The bending angles formed by the inward turning 3 and the outward turning 4 with the surface of the strip plate 1 are acute angles for easy snap-fitting, and the inward turning 3 and the outward turning 4 are integrally formed with the strip plate 1, which makes it easy for the inward turning 3 and the outward turning 4 to snap into each other and strengthens the firmness of the snapping of the inward turning 3 and the outward turning 4.

[0026] The spiral edges of the strip plate 1 meet to form an outer protrusion 2, wherein the inner turn 3 and the strip plate 1 are connected to a bent and protruding state, which is not only convenient for accommodating the outer turn 4, but also convenient for subsequent tapping and snapping to form the outer protrusion 2. Such a setting can make the position of the bite connection part be in an outward protrusion state, while no protrusion will appear inside, thereby maintaining a flat state, which can reduce the resistance in the tube, avoid resistance to the flow of gas, and affect the ventilation effect.

[0027] A first chamfer 5 is provided on the inverted part 3, and a second chamfer 6 is provided on the outverted part 4. The first chamfer 5 and the second chamfer 6 are arranged to facilitate the inverted part 3 and the outverted part 4 to slide together without hindrance during the buckling process.

[0028] The working principle of the utility model is as follows:

[0029] Firstly, a strip plate 1 is selected, and then according to the required caliber, the caliber of the spiral tubular structure is controlled by adjusting the spiral degree of the strip plate 1, so as to achieve the effect of selecting the caliber of the spiral air duct.

[0030] Then, the spiral edges of the strip plate 1 are connected to each other to form a seamless tubular structure by interlocking and pressing the inward turning 3 and the outward turning 4. The spiral tubular structure is cut into a fixed length by a cutting device, and the two ends of the spiral tubular structure are cut into flat ends. Then, corresponding flanges for pipe connection are installed at both ends of the tubular structure to install it. Alternatively, the flanges at both ends of the air duct can be connected end to end by bolts to form a corresponding length.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new type of spiral air duct, characterized in that: The invention comprises a strip plate (1) arranged in a spiral shape, wherein the spiral edges of the strip plate (1) are connected to each other, and flanges (7) are installed at both ends of the strip plate (1) arranged in a spiral shape. The two sides of the strip plate (1) are respectively bent inwardly to form an inward turn (3) and bent outwardly to form an outward turn (4), and the inward turn (3) and the outward turn (4) are bent at an acute angle with the surface of the strip plate (1) to facilitate snap-fit ​​engagement, and the inward turn (3) and the outward turn (4) are integrally formed with the strip plate (1).

2. A novel spiral air duct according to claim 1, characterized in that: The strip plate (1) is wound in a spiral shape, and the inward turning (3) and the outward turning (4) are mutually engaged and pressed tightly, and the junction of the spiral edges of the strip plate (1) is an outer protrusion (2).

3. The novel spiral air duct according to claim 1 is characterized in that: The inward turning (3) is provided with a first chamfer (5), and the outward turning (4) is provided with a second chamfer (6).

4. The novel spiral air duct according to claim 1 is characterized in that: The strip plate (1) is made of galvanized iron sheet which is easy to bend.

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